LXR linux/drivers/net/team/team_mode

   1/*
   2 * drivers/net/team/team_mode_random.c - Random mode for team
   3 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License as published by
   7 * the Free Software Foundation; either version 2 of the License, or
   8 * (at your option) any later version.
   9 */
  10
  11#include <linux/kernel.h>
  12#include <linux/types.h>
  13#include <linux/module.h>
  14#include <linux/init.h>
  15#include <linux/skbuff.h>
  16#include <linux/if_team.h>
  17
  18static bool rnd_transmit(struct team *team, struct sk_buff *skb)
  19{
  20        struct team_port *port;
  21        int port_index;
  22
  23        port_index = prandom_u32_max(team->en_port_count);
  24        port = team_get_port_by_index_rcu(team, port_index);
  25        if (unlikely(!port))
  26                goto drop;
  27        port = team_get_first_port_txable_rcu(team, port);
  28        if (unlikely(!port))
  29                goto drop;
  30        if (team_dev_queue_xmit(team, port, skb))
  31                return false;
  32        return true;
  33
  34drop:
  35        dev_kfree_skb_any(skb);
  36        return false;
  37}
  38
  39static const struct team_mode_ops rnd_mode_ops = {
  40        .transmit               = rnd_transmit,
  41        .port_enter             = team_modeop_port_enter,
  42        .port_change_dev_addr   = team_modeop_port_change_dev_addr,
  43};
  44
  45static const struct team_mode rnd_mode = {
  46        .kind           = "random",
  47        .owner          = THIS_MODULE,
  48        .ops            = &rnd_mode_ops,
  49        .lag_tx_type    = NETDEV_LAG_TX_TYPE_RANDOM,
  50};
  51
  52static int __init rnd_init_module(void)
  53{
  54        return team_mode_register(&rnd_mode);
  55}
  56
  57static void __exit rnd_cleanup_module(void)
  58{
  59        team_mode_unregister(&rnd_mode);
  60}
  61
  62module_init(rnd_init_module);
  63module_exit(rnd_cleanup_module);
  64
  65MODULE_LICENSE("GPL v2");
  66MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
  67MODULE_DESCRIPTION("Random mode for team");
  68MODULE_ALIAS("team-mode-random");
  69