Eric Lee / smarc-fsl-linux-kernel

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lib/netdev-notifier-error-inject.c 1.51 KB
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81f7e3824   Eric Lee   Initial Release, ... 
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  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/netdevice.h>
  
  #include "notifier-error-inject.h"
  
  static int priority;
  module_param(priority, int, 0);
  MODULE_PARM_DESC(priority, "specify netdevice notifier priority");
  
  static struct notifier_err_inject netdev_notifier_err_inject = {
  	.actions = {
  		{ NOTIFIER_ERR_INJECT_ACTION(NETDEV_REGISTER) },
  		{ NOTIFIER_ERR_INJECT_ACTION(NETDEV_CHANGEMTU) },
  		{ NOTIFIER_ERR_INJECT_ACTION(NETDEV_CHANGENAME) },
  		{ NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRE_UP) },
  		{ NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRE_TYPE_CHANGE) },
  		{ NOTIFIER_ERR_INJECT_ACTION(NETDEV_POST_INIT) },
  		{ NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRECHANGEMTU) },
  		{ NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRECHANGEUPPER) },
  		{ NOTIFIER_ERR_INJECT_ACTION(NETDEV_CHANGEUPPER) },
  		{}
  	}
  };
  
  static struct dentry *dir;
  
  static int netdev_err_inject_init(void)
  {
  	int err;
  
  	dir = notifier_err_inject_init("netdev", notifier_err_inject_dir,
  				       &netdev_notifier_err_inject, priority);
  	if (IS_ERR(dir))
  		return PTR_ERR(dir);
  
  	err = register_netdevice_notifier(&netdev_notifier_err_inject.nb);
  	if (err)
  		debugfs_remove_recursive(dir);
  
  	return err;
  }
  
  static void netdev_err_inject_exit(void)
  {
  	unregister_netdevice_notifier(&netdev_notifier_err_inject.nb);
  	debugfs_remove_recursive(dir);
  }
  
  module_init(netdev_err_inject_init);
  module_exit(netdev_err_inject_exit);
  
  MODULE_DESCRIPTION("Netdevice notifier error injection module");
  MODULE_LICENSE("GPL");
  MODULE_AUTHOR("Nikolay Aleksandrov <razor@blackwall.org>");