LXR linux/drivers/net/team/team_mode

   1/*
   2 * drivers/net/team/team_mode_roundrobin.c - Round-robin mode for team
   3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   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/errno.h>
  16#include <linux/netdevice.h>
  17#include <linux/if_team.h>
  18
  19struct rr_priv {
  20        unsigned int sent_packets;
  21};
  22
  23static struct rr_priv *rr_priv(struct team *team)
  24{
  25        return (struct rr_priv *) &team->mode_priv;
  26}
  27
  28static bool rr_transmit(struct team *team, struct sk_buff *skb)
  29{
  30        struct team_port *port;
  31        int port_index;
  32
  33        port_index = team_num_to_port_index(team,
  34                                            rr_priv(team)->sent_packets++);
  35        port = team_get_port_by_index_rcu(team, port_index);
  36        if (unlikely(!port))
  37                goto drop;
  38        port = team_get_first_port_txable_rcu(team, port);
  39        if (unlikely(!port))
  40                goto drop;
  41        if (team_dev_queue_xmit(team, port, skb))
  42                return false;
  43        return true;
  44
  45drop:
  46        dev_kfree_skb_any(skb);
  47        return false;
  48}
  49
  50static const struct team_mode_ops rr_mode_ops = {
  51        .transmit               = rr_transmit,
  52        .port_enter             = team_modeop_port_enter,
  53        .port_change_dev_addr   = team_modeop_port_change_dev_addr,
  54};
  55
  56static const struct team_mode rr_mode = {
  57        .kind           = "roundrobin",
  58        .owner          = THIS_MODULE,
  59        .priv_size      = sizeof(struct rr_priv),
  60        .ops            = &rr_mode_ops,
  61};
  62
  63static int __init rr_init_module(void)
  64{
  65        return team_mode_register(&rr_mode);
  66}
  67
  68static void __exit rr_cleanup_module(void)
  69{
  70        team_mode_unregister(&rr_mode);
  71}
  72
  73module_init(rr_init_module);
  74module_exit(rr_cleanup_module);
  75
  76MODULE_LICENSE("GPL v2");
  77MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
  78MODULE_DESCRIPTION("Round-robin mode for team");
  79MODULE_ALIAS("team-mode-roundrobin");
  80