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1// SPDX-License-Identifier: GPL-2.0-only2#include <linux/kernel.h>3#include <linux/module.h>4#include <linux/netdevice.h>5 6#include "notifier-error-inject.h"7 8static int priority;9module_param(priority, int, 0);10MODULE_PARM_DESC(priority, "specify netdevice notifier priority");11 12static 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 27static struct dentry *dir;28 29static 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 45static void netdev_err_inject_exit(void)46{47 unregister_netdevice_notifier(&netdev_notifier_err_inject.nb);48 debugfs_remove_recursive(dir);49}50 51module_init(netdev_err_inject_init);52module_exit(netdev_err_inject_exit);53 54MODULE_DESCRIPTION("Netdevice notifier error injection module");55MODULE_LICENSE("GPL");56MODULE_AUTHOR("Nikolay Aleksandrov <razor@blackwall.org>");57