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/errno.h>
12 #include <linux/netdevice.h>
13 #include <linux/if_team.h>
14 
15 static bool bc_transmit(struct team *team, struct sk_buff *skb)
16 {
17 	struct team_port *cur;
18 	struct team_port *last = NULL;
19 	struct sk_buff *skb2;
20 	bool ret;
21 	bool sum_ret = false;
22 
23 	list_for_each_entry_rcu(cur, &team->port_list, list) {
24 		if (team_port_txable(cur)) {
25 			if (last) {
26 				skb2 = skb_clone(skb, GFP_ATOMIC);
27 				if (skb2) {
28 					ret = !team_dev_queue_xmit(team, last,
29 								   skb2);
30 					if (!sum_ret)
31 						sum_ret = ret;
32 				}
33 			}
34 			last = cur;
35 		}
36 	}
37 	if (last) {
38 		ret = !team_dev_queue_xmit(team, last, skb);
39 		if (!sum_ret)
40 			sum_ret = ret;
41 	}
42 	return sum_ret;
43 }
44 
45 static const struct team_mode_ops bc_mode_ops = {
46 	.transmit		= bc_transmit,
47 	.port_enter		= team_modeop_port_enter,
48 	.port_change_dev_addr	= team_modeop_port_change_dev_addr,
49 };
50 
51 static const struct team_mode bc_mode = {
52 	.kind		= "broadcast",
53 	.owner		= THIS_MODULE,
54 	.ops		= &bc_mode_ops,
55 	.lag_tx_type	= NETDEV_LAG_TX_TYPE_BROADCAST,
56 };
57 
58 static int __init bc_init_module(void)
59 {
60 	return team_mode_register(&bc_mode);
61 }
62 
63 static void __exit bc_cleanup_module(void)
64 {
65 	team_mode_unregister(&bc_mode);
66 }
67 
68 module_init(bc_init_module);
69 module_exit(bc_cleanup_module);
70 
71 MODULE_LICENSE("GPL v2");
72 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
73 MODULE_DESCRIPTION("Broadcast mode for team");
74 MODULE_ALIAS_TEAM_MODE("broadcast");
75