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");

 
  1/*
  2 * net/drivers/team/team_mode_roundrobin.c - Round-robin mode for team
  3 * Copyright (c) 2011 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
 19struct rr_priv {
 20	unsigned int sent_packets;
 21};
 22
 23static struct rr_priv *rr_priv(struct team *team)
 24{
 25	return (struct rr_priv *) &team->mode_priv;
 26}
 27
 28static struct team_port *__get_first_port_up(struct team *team,
 29					     struct team_port *port)
 30{
 31	struct team_port *cur;
 32
 33	if (port->linkup)
 34		return port;
 35	cur = port;
 36	list_for_each_entry_continue_rcu(cur, &team->port_list, list)
 37		if (cur->linkup)
 38			return cur;
 39	list_for_each_entry_rcu(cur, &team->port_list, list) {
 40		if (cur == port)
 41			break;
 42		if (cur->linkup)
 43			return cur;
 44	}
 45	return NULL;
 46}
 47
 48static bool rr_transmit(struct team *team, struct sk_buff *skb)
 49{
 50	struct team_port *port;
 51	int port_index;
 52
 53	port_index = rr_priv(team)->sent_packets++ % team->en_port_count;
 
 54	port = team_get_port_by_index_rcu(team, port_index);
 55	port = __get_first_port_up(team, port);
 56	if (unlikely(!port))
 57		goto drop;
 58	skb->dev = port->dev;
 59	if (dev_queue_xmit(skb))
 
 
 60		return false;
 61	return true;
 62
 63drop:
 64	dev_kfree_skb_any(skb);
 65	return false;
 66}
 67
 68static int rr_port_enter(struct team *team, struct team_port *port)
 69{
 70	return team_port_set_team_mac(port);
 71}
 72
 73static void rr_port_change_mac(struct team *team, struct team_port *port)
 74{
 75	team_port_set_team_mac(port);
 76}
 77
 78static const struct team_mode_ops rr_mode_ops = {
 79	.transmit		= rr_transmit,
 80	.port_enter		= rr_port_enter,
 81	.port_change_mac	= rr_port_change_mac,
 82};
 83
 84static struct team_mode rr_mode = {
 85	.kind		= "roundrobin",
 86	.owner		= THIS_MODULE,
 87	.priv_size	= sizeof(struct rr_priv),
 88	.ops		= &rr_mode_ops,
 
 89};
 90
 91static int __init rr_init_module(void)
 92{
 93	return team_mode_register(&rr_mode);
 94}
 95
 96static void __exit rr_cleanup_module(void)
 97{
 98	team_mode_unregister(&rr_mode);
 99}
100
101module_init(rr_init_module);
102module_exit(rr_cleanup_module);
103
104MODULE_LICENSE("GPL v2");
105MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
106MODULE_DESCRIPTION("Round-robin mode for team");
107MODULE_ALIAS("team-mode-roundrobin");