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[~shefty/rdma-dev.git] / drivers / net / team / team_mode_broadcast.c
1 /*
2  * drivers/net/team/team_mode_broadcast.c - Broadcast mode for team
3  * Copyright (c) 2012 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 <linux/if_team.h>
18
19 static bool bc_transmit(struct team *team, struct sk_buff *skb)
20 {
21         struct team_port *cur;
22         struct team_port *last = NULL;
23         struct sk_buff *skb2;
24         bool ret;
25         bool sum_ret = false;
26
27         list_for_each_entry_rcu(cur, &team->port_list, list) {
28                 if (team_port_txable(cur)) {
29                         if (last) {
30                                 skb2 = skb_clone(skb, GFP_ATOMIC);
31                                 if (skb2) {
32                                         ret = team_dev_queue_xmit(team, last,
33                                                                   skb2);
34                                         if (!sum_ret)
35                                                 sum_ret = ret;
36                                 }
37                         }
38                         last = cur;
39                 }
40         }
41         if (last) {
42                 ret = team_dev_queue_xmit(team, last, skb);
43                 if (!sum_ret)
44                         sum_ret = ret;
45         }
46         return sum_ret;
47 }
48
49 static int bc_port_enter(struct team *team, struct team_port *port)
50 {
51         return team_port_set_team_dev_addr(port);
52 }
53
54 static void bc_port_change_dev_addr(struct team *team, struct team_port *port)
55 {
56         team_port_set_team_dev_addr(port);
57 }
58
59 static const struct team_mode_ops bc_mode_ops = {
60         .transmit               = bc_transmit,
61         .port_enter             = bc_port_enter,
62         .port_change_dev_addr   = bc_port_change_dev_addr,
63 };
64
65 static const struct team_mode bc_mode = {
66         .kind           = "broadcast",
67         .owner          = THIS_MODULE,
68         .ops            = &bc_mode_ops,
69 };
70
71 static int __init bc_init_module(void)
72 {
73         return team_mode_register(&bc_mode);
74 }
75
76 static void __exit bc_cleanup_module(void)
77 {
78         team_mode_unregister(&bc_mode);
79 }
80
81 module_init(bc_init_module);
82 module_exit(bc_cleanup_module);
83
84 MODULE_LICENSE("GPL v2");
85 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
86 MODULE_DESCRIPTION("Broadcast mode for team");
87 MODULE_ALIAS("team-mode-broadcast");