1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * drivers/net/team/team_mode_broadcast.c - Broadcast mode for team
4  * Copyright (c) 2012 Jiri Pirko <jpirko@redhat.com>
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/netdevice.h>
12 #include <linux/if_team.h>
13 
14 static bool bc_transmit(struct team *team, struct sk_buff *skb)
15 {
16 	struct team_port *cur;
17 	struct team_port *last = NULL;
18 	struct sk_buff *skb2;
19 	bool ret;
20 	bool sum_ret = false;
21 
22 	list_for_each_entry_rcu(cur, &team->port_list, list) {
23 		if (team_port_txable(cur)) {
24 			if (last) {
25 				skb2 = skb_clone(skb, GFP_ATOMIC);
26 				if (skb2) {
27 					ret = !team_dev_queue_xmit(team, last,
28 								   skb2);
29 					if (!sum_ret)
30 						sum_ret = ret;
31 				}
32 			}
33 			last = cur;
34 		}
35 	}
36 	if (last) {
37 		ret = !team_dev_queue_xmit(team, last, skb);
38 		if (!sum_ret)
39 			sum_ret = ret;
40 	}
41 	return sum_ret;
42 }
43 
44 static const struct team_mode_ops bc_mode_ops = {
45 	.transmit		= bc_transmit,
46 	.port_enter		= team_modeop_port_enter,
47 	.port_change_dev_addr	= team_modeop_port_change_dev_addr,
48 };
49 
50 static const struct team_mode bc_mode = {
51 	.kind		= "broadcast",
52 	.owner		= THIS_MODULE,
53 	.ops		= &bc_mode_ops,
54 	.lag_tx_type	= NETDEV_LAG_TX_TYPE_BROADCAST,
55 };
56 
57 static int __init bc_init_module(void)
58 {
59 	return team_mode_register(&bc_mode);
60 }
61 
62 static void __exit bc_cleanup_module(void)
63 {
64 	team_mode_unregister(&bc_mode);
65 }
66 
67 module_init(bc_init_module);
68 module_exit(bc_cleanup_module);
69 
70 MODULE_LICENSE("GPL v2");
71 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
72 MODULE_DESCRIPTION("Broadcast mode for team");
73 MODULE_ALIAS_TEAM_MODE("broadcast");
74