kernel/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 const struct team_mode_ops bc_mode_ops = {
  50         .transmit               = bc_transmit,
  51         .port_enter             = team_modeop_port_enter,
  52         .port_change_dev_addr   = team_modeop_port_change_dev_addr,
  53 };
  54
  55 static const struct team_mode bc_mode = {
  56         .kind           = "broadcast",
  57         .owner          = THIS_MODULE,
  58         .ops            = &bc_mode_ops,
  59 };
  60
  61 static int __init bc_init_module(void)
  62 {
  63         return team_mode_register(&bc_mode);
  64 }
  65
  66 static void __exit bc_cleanup_module(void)
  67 {
  68         team_mode_unregister(&bc_mode);
  69 }
  70
  71 module_init(bc_init_module);
  72 module_exit(bc_cleanup_module);
  73
  74 MODULE_LICENSE("GPL v2");
  75 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
  76 MODULE_DESCRIPTION("Broadcast mode for team");
  77 MODULE_ALIAS("team-mode-broadcast");