LXR linux/lib/netdev-notifier-error-inject.c

   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>");
  56