2 * drivers/net/team/team_mode_random.c - Random mode for team
3 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
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.
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/reciprocal_div.h>
17 #include <linux/if_team.h>
19 static u32 random_N(unsigned int N)
21 return reciprocal_divide(random32(), N);
24 static bool rnd_transmit(struct team *team, struct sk_buff *skb)
26 struct team_port *port;
29 port_index = random_N(team->en_port_count);
30 port = team_get_port_by_index_rcu(team, port_index);
31 port = team_get_first_port_txable_rcu(team, port);
34 if (team_dev_queue_xmit(team, port, skb))
39 dev_kfree_skb_any(skb);
43 static const struct team_mode_ops rnd_mode_ops = {
44 .transmit = rnd_transmit,
45 .port_enter = team_modeop_port_enter,
46 .port_change_dev_addr = team_modeop_port_change_dev_addr,
49 static const struct team_mode rnd_mode = {
55 static int __init rnd_init_module(void)
57 return team_mode_register(&rnd_mode);
60 static void __exit rnd_cleanup_module(void)
62 team_mode_unregister(&rnd_mode);
65 module_init(rnd_init_module);
66 module_exit(rnd_cleanup_module);
68 MODULE_LICENSE("GPL v2");
69 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
70 MODULE_DESCRIPTION("Random mode for team");
71 MODULE_ALIAS("team-mode-random");