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