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1/*
2 * net/drivers/team/team_mode_activebackup.c - Active-backup 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 <net/rtnetlink.h>
18#include <linux/if_team.h>
19
20struct ab_priv {
21 struct team_port __rcu *active_port;
22};
23
24static struct ab_priv *ab_priv(struct team *team)
25{
26 return (struct ab_priv *) &team->mode_priv;
27}
28
29static rx_handler_result_t ab_receive(struct team *team, struct team_port *port,
30 struct sk_buff *skb) {
31 struct team_port *active_port;
32
33 active_port = rcu_dereference(ab_priv(team)->active_port);
34 if (active_port != port)
35 return RX_HANDLER_EXACT;
36 return RX_HANDLER_ANOTHER;
37}
38
39static bool ab_transmit(struct team *team, struct sk_buff *skb)
40{
41 struct team_port *active_port;
42
43 active_port = rcu_dereference(ab_priv(team)->active_port);
44 if (unlikely(!active_port))
45 goto drop;
46 skb->dev = active_port->dev;
47 if (dev_queue_xmit(skb))
48 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{
58 if (ab_priv(team)->active_port == port)
59 RCU_INIT_POINTER(ab_priv(team)->active_port, NULL);
60}
61
62static int ab_active_port_get(struct team *team, struct team_gsetter_ctx *ctx)
63{
64 if (ab_priv(team)->active_port)
65 ctx->data.u32_val = ab_priv(team)->active_port->dev->ifindex;
66 else
67 ctx->data.u32_val = 0;
68 return 0;
69}
70
71static int ab_active_port_set(struct team *team, struct team_gsetter_ctx *ctx)
72{
73 struct team_port *port;
74
75 list_for_each_entry(port, &team->port_list, list) {
76 if (port->dev->ifindex == ctx->data.u32_val) {
77 rcu_assign_pointer(ab_priv(team)->active_port, port);
78 return 0;
79 }
80 }
81 return -ENOENT;
82}
83
84static const struct team_option ab_options[] = {
85 {
86 .name = "activeport",
87 .type = TEAM_OPTION_TYPE_U32,
88 .getter = ab_active_port_get,
89 .setter = ab_active_port_set,
90 },
91};
92
93static int ab_init(struct team *team)
94{
95 return team_options_register(team, ab_options, ARRAY_SIZE(ab_options));
96}
97
98static void ab_exit(struct team *team)
99{
100 team_options_unregister(team, ab_options, ARRAY_SIZE(ab_options));
101}
102
103static const struct team_mode_ops ab_mode_ops = {
104 .init = ab_init,
105 .exit = ab_exit,
106 .receive = ab_receive,
107 .transmit = ab_transmit,
108 .port_leave = ab_port_leave,
109};
110
111static struct team_mode ab_mode = {
112 .kind = "activebackup",
113 .owner = THIS_MODULE,
114 .priv_size = sizeof(struct ab_priv),
115 .ops = &ab_mode_ops,
116};
117
118static int __init ab_init_module(void)
119{
120 return team_mode_register(&ab_mode);
121}
122
123static void __exit ab_cleanup_module(void)
124{
125 team_mode_unregister(&ab_mode);
126}
127
128module_init(ab_init_module);
129module_exit(ab_cleanup_module);
130
131MODULE_LICENSE("GPL v2");
132MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
133MODULE_DESCRIPTION("Active-backup mode for team");
134MODULE_ALIAS("team-mode-activebackup");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * drivers/net/team/team_mode_activebackup.c - Active-backup 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/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;
18 struct team_option_inst_info *ap_opt_inst_info;
19};
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
40 active_port = rcu_dereference_bh(ab_priv(team)->active_port);
41 if (unlikely(!active_port))
42 goto drop;
43 if (team_dev_queue_xmit(team, active_port, skb))
44 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{
54 if (ab_priv(team)->active_port == port) {
55 RCU_INIT_POINTER(ab_priv(team)->active_port, NULL);
56 team_option_inst_set_change(ab_priv(team)->ap_opt_inst_info);
57 }
58}
59
60static void ab_active_port_init(struct team *team,
61 struct team_option_inst_info *info)
62{
63 ab_priv(team)->ap_opt_inst_info = info;
64}
65
66static void ab_active_port_get(struct team *team, struct team_gsetter_ctx *ctx)
67{
68 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;
74 else
75 ctx->data.u32_val = 0;
76}
77
78static int ab_active_port_set(struct team *team, struct team_gsetter_ctx *ctx)
79{
80 struct team_port *port;
81
82 list_for_each_entry(port, &team->port_list, list) {
83 if (port->dev->ifindex == ctx->data.u32_val) {
84 rcu_assign_pointer(ab_priv(team)->active_port, port);
85 return 0;
86 }
87 }
88 return -ENOENT;
89}
90
91static const struct team_option ab_options[] = {
92 {
93 .name = "activeport",
94 .type = TEAM_OPTION_TYPE_U32,
95 .init = ab_active_port_init,
96 .getter = ab_active_port_get,
97 .setter = ab_active_port_set,
98 },
99};
100
101static int ab_init(struct team *team)
102{
103 return team_options_register(team, ab_options, ARRAY_SIZE(ab_options));
104}
105
106static void ab_exit(struct team *team)
107{
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
119static const struct team_mode ab_mode = {
120 .kind = "activebackup",
121 .owner = THIS_MODULE,
122 .priv_size = sizeof(struct ab_priv),
123 .ops = &ab_mode_ops,
124 .lag_tx_type = NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
125};
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");
143MODULE_ALIAS_TEAM_MODE("activebackup");