1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * drivers/net/team/team_mode_roundrobin.c - Round-robin mode for team
4 * Copyright (c) 2011 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
14struct rr_priv {
15	unsigned int sent_packets;
16};
17
18static struct rr_priv *rr_priv(struct team *team)
19{
20	return (struct rr_priv *) &team->mode_priv;
21}
22
23static bool rr_transmit(struct team *team, struct sk_buff *skb)
24{
25	struct team_port *port;
26	int port_index;
27
28	port_index = team_num_to_port_index(team,
29					    rr_priv(team)->sent_packets++);
30	port = team_get_port_by_index_rcu(team, port_index);
31	if (unlikely(!port))
32		goto drop;
33	port = team_get_first_port_txable_rcu(team, port);
34	if (unlikely(!port))
35		goto drop;
36	if (team_dev_queue_xmit(team, port, skb))
37		return false;
38	return true;
39
40drop:
41	dev_kfree_skb_any(skb);
42	return false;
43}
44
45static const struct team_mode_ops rr_mode_ops = {
46	.transmit		= rr_transmit,
47	.port_enter		= team_modeop_port_enter,
48	.port_change_dev_addr	= team_modeop_port_change_dev_addr,
49};
50
51static const struct team_mode rr_mode = {
52	.kind		= "roundrobin",
53	.owner		= THIS_MODULE,
54	.priv_size	= sizeof(struct rr_priv),
55	.ops		= &rr_mode_ops,
56	.lag_tx_type	= NETDEV_LAG_TX_TYPE_ROUNDROBIN,
57};
58
59static int __init rr_init_module(void)
60{
61	return team_mode_register(&rr_mode);
62}
63
64static void __exit rr_cleanup_module(void)
65{
66	team_mode_unregister(&rr_mode);
67}
68
69module_init(rr_init_module);
70module_exit(rr_cleanup_module);
71
72MODULE_LICENSE("GPL v2");
73MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
74MODULE_DESCRIPTION("Round-robin mode for team");
75MODULE_ALIAS_TEAM_MODE("roundrobin");
76