2 * drivers/net/team/team_mode_activebackup.c - Active-backup mode for team
3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
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.
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>
21 struct team_port __rcu
*active_port
;
24 static struct ab_priv
*ab_priv(struct team
*team
)
26 return (struct ab_priv
*) &team
->mode_priv
;
29 static rx_handler_result_t
ab_receive(struct team
*team
, struct team_port
*port
,
30 struct sk_buff
*skb
) {
31 struct team_port
*active_port
;
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
;
39 static bool ab_transmit(struct team
*team
, struct sk_buff
*skb
)
41 struct team_port
*active_port
;
43 active_port
= rcu_dereference_bh(ab_priv(team
)->active_port
);
44 if (unlikely(!active_port
))
46 if (team_dev_queue_xmit(team
, active_port
, skb
))
51 dev_kfree_skb_any(skb
);
55 static void ab_port_leave(struct team
*team
, struct team_port
*port
)
57 if (ab_priv(team
)->active_port
== port
)
58 RCU_INIT_POINTER(ab_priv(team
)->active_port
, NULL
);
61 static int ab_active_port_get(struct team
*team
, struct team_gsetter_ctx
*ctx
)
63 struct team_port
*active_port
;
65 active_port
= rcu_dereference_protected(ab_priv(team
)->active_port
,
66 lockdep_is_held(&team
->lock
));
68 ctx
->data
.u32_val
= active_port
->dev
->ifindex
;
70 ctx
->data
.u32_val
= 0;
74 static int ab_active_port_set(struct team
*team
, struct team_gsetter_ctx
*ctx
)
76 struct team_port
*port
;
78 list_for_each_entry(port
, &team
->port_list
, list
) {
79 if (port
->dev
->ifindex
== ctx
->data
.u32_val
) {
80 rcu_assign_pointer(ab_priv(team
)->active_port
, port
);
87 static const struct team_option ab_options
[] = {
90 .type
= TEAM_OPTION_TYPE_U32
,
91 .getter
= ab_active_port_get
,
92 .setter
= ab_active_port_set
,
96 static int ab_init(struct team
*team
)
98 return team_options_register(team
, ab_options
, ARRAY_SIZE(ab_options
));
101 static void ab_exit(struct team
*team
)
103 team_options_unregister(team
, ab_options
, ARRAY_SIZE(ab_options
));
106 static const struct team_mode_ops ab_mode_ops
= {
109 .receive
= ab_receive
,
110 .transmit
= ab_transmit
,
111 .port_leave
= ab_port_leave
,
114 static const struct team_mode ab_mode
= {
115 .kind
= "activebackup",
116 .owner
= THIS_MODULE
,
117 .priv_size
= sizeof(struct ab_priv
),
121 static int __init
ab_init_module(void)
123 return team_mode_register(&ab_mode
);
126 static void __exit
ab_cleanup_module(void)
128 team_mode_unregister(&ab_mode
);
131 module_init(ab_init_module
);
132 module_exit(ab_cleanup_module
);
134 MODULE_LICENSE("GPL v2");
135 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
136 MODULE_DESCRIPTION("Active-backup mode for team");
137 MODULE_ALIAS("team-mode-activebackup");