/*
   * drivers/net/team/team_mode_random.c - Random mode for team
   * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   */
  
  #include <linux/kernel.h>
  #include <linux/types.h>
  #include <linux/module.h>
  #include <linux/init.h>
  #include <linux/skbuff.h>

  #include <linux/if_team.h>

  static bool rnd_transmit(struct team *team, struct sk_buff *skb)
  {
  	struct team_port *port;
  	int port_index;

  	port_index = prandom_u32_max(team->en_port_count);

  	port = team_get_port_by_index_rcu(team, port_index);

  	if (unlikely(!port))
  		goto drop;

  	port = team_get_first_port_txable_rcu(team, port);
  	if (unlikely(!port))
  		goto drop;
  	if (team_dev_queue_xmit(team, port, skb))
  		return false;
  	return true;
  
  drop:
  	dev_kfree_skb_any(skb);
  	return false;
  }
  
  static const struct team_mode_ops rnd_mode_ops = {
  	.transmit		= rnd_transmit,
  	.port_enter		= team_modeop_port_enter,
  	.port_change_dev_addr	= team_modeop_port_change_dev_addr,
  };
  
  static const struct team_mode rnd_mode = {
  	.kind		= "random",
  	.owner		= THIS_MODULE,
  	.ops		= &rnd_mode_ops,

  	.lag_tx_type	= NETDEV_LAG_TX_TYPE_RANDOM,

  };
  
  static int __init rnd_init_module(void)
  {
  	return team_mode_register(&rnd_mode);
  }
  
  static void __exit rnd_cleanup_module(void)
  {
  	team_mode_unregister(&rnd_mode);
  }
  
  module_init(rnd_init_module);
  module_exit(rnd_cleanup_module);
  
  MODULE_LICENSE("GPL v2");
  MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
  MODULE_DESCRIPTION("Random mode for team");
  MODULE_ALIAS("team-mode-random");