blob: e0f599e2a51dd6da759c9c0489f74bc3c665dcc4 [file] [log] [blame]
Thomas Gleixner2874c5f2019-05-27 08:55:01 +02001// SPDX-License-Identifier: GPL-2.0-or-later
Jiri Pirko3d249d42011-11-11 22:16:48 +00002/*
Jiri Pirko0d572e42012-06-19 05:54:09 +00003 * drivers/net/team/team_mode_activebackup.c - Active-backup mode for team
Jiri Pirko3d249d42011-11-11 22:16:48 +00004 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
Jiri Pirko3d249d42011-11-11 22:16:48 +00005 */
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 <net/rtnetlink.h>
14#include <linux/if_team.h>
15
16struct ab_priv {
17 struct team_port __rcu *active_port;
Jiri Pirko675b8042013-02-01 08:17:26 +000018 struct team_option_inst_info *ap_opt_inst_info;
Jiri Pirko3d249d42011-11-11 22:16:48 +000019};
20
21static struct ab_priv *ab_priv(struct team *team)
22{
23 return (struct ab_priv *) &team->mode_priv;
24}
25
26static rx_handler_result_t ab_receive(struct team *team, struct team_port *port,
27 struct sk_buff *skb) {
28 struct team_port *active_port;
29
30 active_port = rcu_dereference(ab_priv(team)->active_port);
31 if (active_port != port)
32 return RX_HANDLER_EXACT;
33 return RX_HANDLER_ANOTHER;
34}
35
36static bool ab_transmit(struct team *team, struct sk_buff *skb)
37{
38 struct team_port *active_port;
39
Jiri Pirkod1904fb2012-06-19 05:54:21 +000040 active_port = rcu_dereference_bh(ab_priv(team)->active_port);
Jiri Pirko3d249d42011-11-11 22:16:48 +000041 if (unlikely(!active_port))
42 goto drop;
Jiri Pirkobd2d0832012-07-17 05:22:36 +000043 if (team_dev_queue_xmit(team, active_port, skb))
Jiri Pirko3d249d42011-11-11 22:16:48 +000044 return false;
45 return true;
46
47drop:
48 dev_kfree_skb_any(skb);
49 return false;
50}
51
52static void ab_port_leave(struct team *team, struct team_port *port)
53{
Jiri Pirko675b8042013-02-01 08:17:26 +000054 if (ab_priv(team)->active_port == port) {
Eric Dumazet2cfa5a02011-11-23 07:09:32 +000055 RCU_INIT_POINTER(ab_priv(team)->active_port, NULL);
Jiri Pirko675b8042013-02-01 08:17:26 +000056 team_option_inst_set_change(ab_priv(team)->ap_opt_inst_info);
57 }
58}
59
Zhengchao Shaode3ecc42023-08-07 09:25:54 +080060static void ab_active_port_init(struct team *team,
61 struct team_option_inst_info *info)
Jiri Pirko675b8042013-02-01 08:17:26 +000062{
63 ab_priv(team)->ap_opt_inst_info = info;
Jiri Pirko3d249d42011-11-11 22:16:48 +000064}
65
Zhengchao Shaoc3b41f42023-08-07 09:25:55 +080066static void ab_active_port_get(struct team *team, struct team_gsetter_ctx *ctx)
Jiri Pirko3d249d42011-11-11 22:16:48 +000067{
Jiri Pirko6dab0152012-06-20 08:39:39 +000068 struct team_port *active_port;
69
70 active_port = rcu_dereference_protected(ab_priv(team)->active_port,
71 lockdep_is_held(&team->lock));
72 if (active_port)
73 ctx->data.u32_val = active_port->dev->ifindex;
Jiri Pirko80f7c662012-04-10 05:15:42 +000074 else
75 ctx->data.u32_val = 0;
Jiri Pirko3d249d42011-11-11 22:16:48 +000076}
77
Jiri Pirko80f7c662012-04-10 05:15:42 +000078static int ab_active_port_set(struct team *team, struct team_gsetter_ctx *ctx)
Jiri Pirko3d249d42011-11-11 22:16:48 +000079{
Jiri Pirko3d249d42011-11-11 22:16:48 +000080 struct team_port *port;
81
Jiri Pirko679b1602012-04-10 05:15:45 +000082 list_for_each_entry(port, &team->port_list, list) {
Jiri Pirko80f7c662012-04-10 05:15:42 +000083 if (port->dev->ifindex == ctx->data.u32_val) {
Jiri Pirko3d249d42011-11-11 22:16:48 +000084 rcu_assign_pointer(ab_priv(team)->active_port, port);
85 return 0;
86 }
87 }
88 return -ENOENT;
89}
90
Jiri Pirko358b8382011-11-16 11:09:09 +000091static const struct team_option ab_options[] = {
Jiri Pirko3d249d42011-11-11 22:16:48 +000092 {
93 .name = "activeport",
94 .type = TEAM_OPTION_TYPE_U32,
Jiri Pirko675b8042013-02-01 08:17:26 +000095 .init = ab_active_port_init,
Jiri Pirko3d249d42011-11-11 22:16:48 +000096 .getter = ab_active_port_get,
97 .setter = ab_active_port_set,
98 },
99};
100
Jiri Pirkocade4552012-04-10 05:15:46 +0000101static int ab_init(struct team *team)
Jiri Pirko3d249d42011-11-11 22:16:48 +0000102{
Jiri Pirko358b8382011-11-16 11:09:09 +0000103 return team_options_register(team, ab_options, ARRAY_SIZE(ab_options));
Jiri Pirko3d249d42011-11-11 22:16:48 +0000104}
105
Jiri Pirkocade4552012-04-10 05:15:46 +0000106static void ab_exit(struct team *team)
Jiri Pirko3d249d42011-11-11 22:16:48 +0000107{
108 team_options_unregister(team, ab_options, ARRAY_SIZE(ab_options));
109}
110
111static const struct team_mode_ops ab_mode_ops = {
112 .init = ab_init,
113 .exit = ab_exit,
114 .receive = ab_receive,
115 .transmit = ab_transmit,
116 .port_leave = ab_port_leave,
117};
118
Jiri Pirko04027882012-06-19 05:54:03 +0000119static const struct team_mode ab_mode = {
Jiri Pirko3d249d42011-11-11 22:16:48 +0000120 .kind = "activebackup",
121 .owner = THIS_MODULE,
122 .priv_size = sizeof(struct ab_priv),
123 .ops = &ab_mode_ops,
Jiri Pirko8fd72852015-12-03 12:12:13 +0100124 .lag_tx_type = NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
Jiri Pirko3d249d42011-11-11 22:16:48 +0000125};
126
127static int __init ab_init_module(void)
128{
129 return team_mode_register(&ab_mode);
130}
131
132static void __exit ab_cleanup_module(void)
133{
134 team_mode_unregister(&ab_mode);
135}
136
137module_init(ab_init_module);
138module_exit(ab_cleanup_module);
139
140MODULE_LICENSE("GPL v2");
141MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
142MODULE_DESCRIPTION("Active-backup mode for team");
Zhang Shengju3a5f8992017-06-01 15:37:02 +0800143MODULE_ALIAS_TEAM_MODE("activebackup");