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(prandom_u32(), 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
);
33 port
= team_get_first_port_txable_rcu(team
, port
);
36 if (team_dev_queue_xmit(team
, port
, skb
))
41 dev_kfree_skb_any(skb
);
45 static const struct team_mode_ops rnd_mode_ops
= {
46 .transmit
= rnd_transmit
,
47 .port_enter
= team_modeop_port_enter
,
48 .port_change_dev_addr
= team_modeop_port_change_dev_addr
,
51 static const struct team_mode rnd_mode
= {
57 static int __init
rnd_init_module(void)
59 return team_mode_register(&rnd_mode
);
62 static void __exit
rnd_cleanup_module(void)
64 team_mode_unregister(&rnd_mode
);
67 module_init(rnd_init_module
);
68 module_exit(rnd_cleanup_module
);
70 MODULE_LICENSE("GPL v2");
71 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
72 MODULE_DESCRIPTION("Random mode for team");
73 MODULE_ALIAS("team-mode-random");