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");