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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 int 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 return 0;
65}
66
67static int ab_active_port_get(struct team *team, struct team_gsetter_ctx *ctx)
68{
69 struct team_port *active_port;
70
71 active_port = rcu_dereference_protected(ab_priv(team)->active_port,
72 lockdep_is_held(&team->lock));
73 if (active_port)
74 ctx->data.u32_val = active_port->dev->ifindex;
75 else
76 ctx->data.u32_val = 0;
77 return 0;
78}
79
80static int ab_active_port_set(struct team *team, struct team_gsetter_ctx *ctx)
81{
82 struct team_port *port;
83
84 list_for_each_entry(port, &team->port_list, list) {
85 if (port->dev->ifindex == ctx->data.u32_val) {
86 rcu_assign_pointer(ab_priv(team)->active_port, port);
87 return 0;
88 }
89 }
90 return -ENOENT;
91}
92
93static const struct team_option ab_options[] = {
94 {
95 .name = "activeport",
96 .type = TEAM_OPTION_TYPE_U32,
97 .init = ab_active_port_init,
98 .getter = ab_active_port_get,
99 .setter = ab_active_port_set,
100 },
101};
102
103static int ab_init(struct team *team)
104{
105 return team_options_register(team, ab_options, ARRAY_SIZE(ab_options));
106}
107
108static void ab_exit(struct team *team)
109{
110 team_options_unregister(team, ab_options, ARRAY_SIZE(ab_options));
111}
112
113static const struct team_mode_ops ab_mode_ops = {
114 .init = ab_init,
115 .exit = ab_exit,
116 .receive = ab_receive,
117 .transmit = ab_transmit,
118 .port_leave = ab_port_leave,
119};
120
121static const struct team_mode ab_mode = {
122 .kind = "activebackup",
123 .owner = THIS_MODULE,
124 .priv_size = sizeof(struct ab_priv),
125 .ops = &ab_mode_ops,
126 .lag_tx_type = NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
127};
128
129static int __init ab_init_module(void)
130{
131 return team_mode_register(&ab_mode);
132}
133
134static void __exit ab_cleanup_module(void)
135{
136 team_mode_unregister(&ab_mode);
137}
138
139module_init(ab_init_module);
140module_exit(ab_cleanup_module);
141
142MODULE_LICENSE("GPL v2");
143MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
144MODULE_DESCRIPTION("Active-backup mode for team");
145MODULE_ALIAS_TEAM_MODE("activebackup");
146
