net/6lowpan/core.c

   1 /* This program is free software; you can redistribute it and/or modify
   2  * it under the terms of the GNU General Public License version 2
   3  * as published by the Free Software Foundation.
   4  *
   5  * This program is distributed in the hope that it will be useful,
   6  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   7  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   8  * GNU General Public License for more details.
   9  *
  10  * Authors:
  11  * (C) 2015 Pengutronix, Alexander Aring <aar@pengutronix.de>
  12  */
  13
  14 #include <linux/module.h>
  15
  16 #include <net/6lowpan.h>
  17
  18 #include "6lowpan_i.h"
  19
  20 int lowpan_register_netdevice(struct net_device *dev,
  21                               enum lowpan_lltypes lltype)
  22 {
  23         int ret;
  24
  25         dev->addr_len = EUI64_ADDR_LEN;
  26         dev->type = ARPHRD_6LOWPAN;
  27         dev->mtu = IPV6_MIN_MTU;
  28         dev->priv_flags |= IFF_NO_QUEUE;
  29
  30         lowpan_priv(dev)->lltype = lltype;
  31
  32         ret = register_netdevice(dev);
  33         if (ret < 0)
  34                 return ret;
  35
  36         ret = lowpan_dev_debugfs_init(dev);
  37         if (ret < 0)
  38                 unregister_netdevice(dev);
  39
  40         return ret;
  41 }
  42 EXPORT_SYMBOL(lowpan_register_netdevice);
  43
  44 int lowpan_register_netdev(struct net_device *dev,
  45                            enum lowpan_lltypes lltype)
  46 {
  47         int ret;
  48
  49         rtnl_lock();
  50         ret = lowpan_register_netdevice(dev, lltype);
  51         rtnl_unlock();
  52         return ret;
  53 }
  54 EXPORT_SYMBOL(lowpan_register_netdev);
  55
  56 void lowpan_unregister_netdevice(struct net_device *dev)
  57 {
  58         unregister_netdevice(dev);
  59         lowpan_dev_debugfs_exit(dev);
  60 }
  61 EXPORT_SYMBOL(lowpan_unregister_netdevice);
  62
  63 void lowpan_unregister_netdev(struct net_device *dev)
  64 {
  65         rtnl_lock();
  66         lowpan_unregister_netdevice(dev);
  67         rtnl_unlock();
  68 }
  69 EXPORT_SYMBOL(lowpan_unregister_netdev);
  70
  71 static int __init lowpan_module_init(void)
  72 {
  73         int ret;
  74
  75         ret = lowpan_debugfs_init();
  76         if (ret < 0)
  77                 return ret;
  78
  79         request_module_nowait("ipv6");
  80
  81         request_module_nowait("nhc_dest");
  82         request_module_nowait("nhc_fragment");
  83         request_module_nowait("nhc_hop");
  84         request_module_nowait("nhc_ipv6");
  85         request_module_nowait("nhc_mobility");
  86         request_module_nowait("nhc_routing");
  87         request_module_nowait("nhc_udp");
  88
  89         return 0;
  90 }
  91
  92 static void __exit lowpan_module_exit(void)
  93 {
  94         lowpan_debugfs_exit();
  95 }
  96
  97 module_init(lowpan_module_init);
  98 module_exit(lowpan_module_exit);
  99
 100 MODULE_LICENSE("GPL");