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
14 struct rr_priv {
15 unsigned int sent_packets;
16 };
17
rr_priv(struct team * team)18 static struct rr_priv *rr_priv(struct team *team)
19 {
20 return (struct rr_priv *) &team->mode_priv;
21 }
22
rr_transmit(struct team * team,struct sk_buff * skb)23 static 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
40 drop:
41 dev_kfree_skb_any(skb);
42 return false;
43 }
44
45 static 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
51 static 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
rr_init_module(void)59 static int __init rr_init_module(void)
60 {
61 return team_mode_register(&rr_mode);
62 }
63
rr_cleanup_module(void)64 static void __exit rr_cleanup_module(void)
65 {
66 team_mode_unregister(&rr_mode);
67 }
68
69 module_init(rr_init_module);
70 module_exit(rr_cleanup_module);
71
72 MODULE_LICENSE("GPL v2");
73 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
74 MODULE_DESCRIPTION("Round-robin mode for team");
75 MODULE_ALIAS_TEAM_MODE("roundrobin");
76
