1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * drivers/net/team/team_mode_random.c - Random mode for team
4 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/types.h>
9 #include <linux/module.h>
10 #include <linux/init.h>
11 #include <linux/skbuff.h>
12 #include <linux/if_team.h>
13
rnd_transmit(struct team * team,struct sk_buff * skb)14 static bool rnd_transmit(struct team *team, struct sk_buff *skb)
15 {
16 struct team_port *port;
17 int port_index;
18
19 port_index = get_random_u32_below(team->en_port_count);
20 port = team_get_port_by_index_rcu(team, port_index);
21 if (unlikely(!port))
22 goto drop;
23 port = team_get_first_port_txable_rcu(team, port);
24 if (unlikely(!port))
25 goto drop;
26 if (team_dev_queue_xmit(team, port, skb))
27 return false;
28 return true;
29
30 drop:
31 dev_kfree_skb_any(skb);
32 return false;
33 }
34
35 static const struct team_mode_ops rnd_mode_ops = {
36 .transmit = rnd_transmit,
37 .port_enter = team_modeop_port_enter,
38 .port_change_dev_addr = team_modeop_port_change_dev_addr,
39 };
40
41 static const struct team_mode rnd_mode = {
42 .kind = "random",
43 .owner = THIS_MODULE,
44 .ops = &rnd_mode_ops,
45 .lag_tx_type = NETDEV_LAG_TX_TYPE_RANDOM,
46 };
47
rnd_init_module(void)48 static int __init rnd_init_module(void)
49 {
50 return team_mode_register(&rnd_mode);
51 }
52
rnd_cleanup_module(void)53 static void __exit rnd_cleanup_module(void)
54 {
55 team_mode_unregister(&rnd_mode);
56 }
57
58 module_init(rnd_init_module);
59 module_exit(rnd_cleanup_module);
60
61 MODULE_LICENSE("GPL v2");
62 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
63 MODULE_DESCRIPTION("Random mode for team");
64 MODULE_ALIAS_TEAM_MODE("random");
65