1 /*
2  * drivers/net/team/team_mode_broadcast.c - Broadcast mode for team
3  * Copyright (c) 2012 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 
19 static bool bc_transmit(struct team *team, struct sk_buff *skb)
20 {
21 	struct team_port *cur;
22 	struct team_port *last = NULL;
23 	struct sk_buff *skb2;
24 	bool ret;
25 	bool sum_ret = false;
26 
27 	list_for_each_entry_rcu(cur, &team->port_list, list) {
28 		if (team_port_txable(cur)) {
29 			if (last) {
30 				skb2 = skb_clone(skb, GFP_ATOMIC);
31 				if (skb2) {
32 					ret = !team_dev_queue_xmit(team, last,
33 								   skb2);
34 					if (!sum_ret)
35 						sum_ret = ret;
36 				}
37 			}
38 			last = cur;
39 		}
40 	}
41 	if (last) {
42 		ret = !team_dev_queue_xmit(team, last, skb);
43 		if (!sum_ret)
44 			sum_ret = ret;
45 	}
46 	return sum_ret;
47 }
48 
49 static const struct team_mode_ops bc_mode_ops = {
50 	.transmit		= bc_transmit,
51 	.port_enter		= team_modeop_port_enter,
52 	.port_change_dev_addr	= team_modeop_port_change_dev_addr,
53 };
54 
55 static const struct team_mode bc_mode = {
56 	.kind		= "broadcast",
57 	.owner		= THIS_MODULE,
58 	.ops		= &bc_mode_ops,
59 	.lag_tx_type	= NETDEV_LAG_TX_TYPE_BROADCAST,
60 };
61 
62 static int __init bc_init_module(void)
63 {
64 	return team_mode_register(&bc_mode);
65 }
66 
67 static void __exit bc_cleanup_module(void)
68 {
69 	team_mode_unregister(&bc_mode);
70 }
71 
72 module_init(bc_init_module);
73 module_exit(bc_cleanup_module);
74 
75 MODULE_LICENSE("GPL v2");
76 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
77 MODULE_DESCRIPTION("Broadcast mode for team");
78 MODULE_ALIAS("team-mode-broadcast");
79