blob: 3f189823ba3b2e44e7bc3603af8ef90424421208 [file] [log] [blame]
Jiri Pirko3d249d42011-11-11 22:16:48 +00001/*
Jiri Pirko0d572e42012-06-19 05:54:09 +00002 * drivers/net/team/team_mode_activebackup.c - Active-backup mode for team
Jiri Pirko3d249d42011-11-11 22:16:48 +00003 * 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 <net/rtnetlink.h>
18#include <linux/if_team.h>
19
20struct ab_priv {
21 struct team_port __rcu *active_port;
Jiri Pirko675b8042013-02-01 08:17:26 +000022 struct team_option_inst_info *ap_opt_inst_info;
Jiri Pirko3d249d42011-11-11 22:16:48 +000023};
24
25static struct ab_priv *ab_priv(struct team *team)
26{
27 return (struct ab_priv *) &team->mode_priv;
28}
29
30static rx_handler_result_t ab_receive(struct team *team, struct team_port *port,
31 struct sk_buff *skb) {
32 struct team_port *active_port;
33
34 active_port = rcu_dereference(ab_priv(team)->active_port);
35 if (active_port != port)
36 return RX_HANDLER_EXACT;
37 return RX_HANDLER_ANOTHER;
38}
39
40static bool ab_transmit(struct team *team, struct sk_buff *skb)
41{
42 struct team_port *active_port;
43
Jiri Pirkod1904fb2012-06-19 05:54:21 +000044 active_port = rcu_dereference_bh(ab_priv(team)->active_port);
Jiri Pirko3d249d42011-11-11 22:16:48 +000045 if (unlikely(!active_port))
46 goto drop;
Jiri Pirkobd2d0832012-07-17 05:22:36 +000047 if (team_dev_queue_xmit(team, active_port, skb))
Jiri Pirko3d249d42011-11-11 22:16:48 +000048 return false;
49 return true;
50
51drop:
52 dev_kfree_skb_any(skb);
53 return false;
54}
55
56static void ab_port_leave(struct team *team, struct team_port *port)
57{
Jiri Pirko675b8042013-02-01 08:17:26 +000058 if (ab_priv(team)->active_port == port) {
Eric Dumazet2cfa5a02011-11-23 07:09:32 +000059 RCU_INIT_POINTER(ab_priv(team)->active_port, NULL);
Jiri Pirko675b8042013-02-01 08:17:26 +000060 team_option_inst_set_change(ab_priv(team)->ap_opt_inst_info);
61 }
62}
63
64static int ab_active_port_init(struct team *team,
65 struct team_option_inst_info *info)
66{
67 ab_priv(team)->ap_opt_inst_info = info;
68 return 0;
Jiri Pirko3d249d42011-11-11 22:16:48 +000069}
70
Jiri Pirko80f7c662012-04-10 05:15:42 +000071static int ab_active_port_get(struct team *team, struct team_gsetter_ctx *ctx)
Jiri Pirko3d249d42011-11-11 22:16:48 +000072{
Jiri Pirko6dab0152012-06-20 08:39:39 +000073 struct team_port *active_port;
74
75 active_port = rcu_dereference_protected(ab_priv(team)->active_port,
76 lockdep_is_held(&team->lock));
77 if (active_port)
78 ctx->data.u32_val = active_port->dev->ifindex;
Jiri Pirko80f7c662012-04-10 05:15:42 +000079 else
80 ctx->data.u32_val = 0;
Jiri Pirko3d249d42011-11-11 22:16:48 +000081 return 0;
82}
83
Jiri Pirko80f7c662012-04-10 05:15:42 +000084static int ab_active_port_set(struct team *team, struct team_gsetter_ctx *ctx)
Jiri Pirko3d249d42011-11-11 22:16:48 +000085{
Jiri Pirko3d249d42011-11-11 22:16:48 +000086 struct team_port *port;
87
Jiri Pirko679b1602012-04-10 05:15:45 +000088 list_for_each_entry(port, &team->port_list, list) {
Jiri Pirko80f7c662012-04-10 05:15:42 +000089 if (port->dev->ifindex == ctx->data.u32_val) {
Jiri Pirko3d249d42011-11-11 22:16:48 +000090 rcu_assign_pointer(ab_priv(team)->active_port, port);
91 return 0;
92 }
93 }
94 return -ENOENT;
95}
96
Jiri Pirko358b8382011-11-16 11:09:09 +000097static const struct team_option ab_options[] = {
Jiri Pirko3d249d42011-11-11 22:16:48 +000098 {
99 .name = "activeport",
100 .type = TEAM_OPTION_TYPE_U32,
Jiri Pirko675b8042013-02-01 08:17:26 +0000101 .init = ab_active_port_init,
Jiri Pirko3d249d42011-11-11 22:16:48 +0000102 .getter = ab_active_port_get,
103 .setter = ab_active_port_set,
104 },
105};
106
Jiri Pirkocade4552012-04-10 05:15:46 +0000107static int ab_init(struct team *team)
Jiri Pirko3d249d42011-11-11 22:16:48 +0000108{
Jiri Pirko358b8382011-11-16 11:09:09 +0000109 return team_options_register(team, ab_options, ARRAY_SIZE(ab_options));
Jiri Pirko3d249d42011-11-11 22:16:48 +0000110}
111
Jiri Pirkocade4552012-04-10 05:15:46 +0000112static void ab_exit(struct team *team)
Jiri Pirko3d249d42011-11-11 22:16:48 +0000113{
114 team_options_unregister(team, ab_options, ARRAY_SIZE(ab_options));
115}
116
117static const struct team_mode_ops ab_mode_ops = {
118 .init = ab_init,
119 .exit = ab_exit,
120 .receive = ab_receive,
121 .transmit = ab_transmit,
122 .port_leave = ab_port_leave,
123};
124
Jiri Pirko04027882012-06-19 05:54:03 +0000125static const struct team_mode ab_mode = {
Jiri Pirko3d249d42011-11-11 22:16:48 +0000126 .kind = "activebackup",
127 .owner = THIS_MODULE,
128 .priv_size = sizeof(struct ab_priv),
129 .ops = &ab_mode_ops,
Jiri Pirko8fd72852015-12-03 12:12:13 +0100130 .lag_tx_type = NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
Jiri Pirko3d249d42011-11-11 22:16:48 +0000131};
132
133static int __init ab_init_module(void)
134{
135 return team_mode_register(&ab_mode);
136}
137
138static void __exit ab_cleanup_module(void)
139{
140 team_mode_unregister(&ab_mode);
141}
142
143module_init(ab_init_module);
144module_exit(ab_cleanup_module);
145
146MODULE_LICENSE("GPL v2");
147MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
148MODULE_DESCRIPTION("Active-backup mode for team");
149MODULE_ALIAS("team-mode-activebackup");