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Alexander Aringb72f6f52015-08-11 21:44:08 +02001/* 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
Alexander Aring4ae935c2015-08-11 21:44:09 +020014#include <linux/module.h>
15
Alexander Aringb72f6f52015-08-11 21:44:08 +020016#include <net/6lowpan.h>
17
Alexander Aringb1815fd2015-12-09 22:46:30 +010018#include "6lowpan_i.h"
19
Alexander Aring00f59312015-12-09 22:46:29 +010020int lowpan_register_netdevice(struct net_device *dev,
21 enum lowpan_lltypes lltype)
Alexander Aringb72f6f52015-08-11 21:44:08 +020022{
Alexander Aring5609c182016-02-22 09:13:54 +010023 int i, ret;
Alexander Aringb1815fd2015-12-09 22:46:30 +010024
Alexander Aring4d6a6ae2015-10-02 20:28:04 +020025 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
Alexander Aringb72f6f52015-08-11 21:44:08 +020030 lowpan_priv(dev)->lltype = lltype;
Alexander Aring00f59312015-12-09 22:46:29 +010031
Alexander Aring5609c182016-02-22 09:13:54 +010032 spin_lock_init(&lowpan_priv(dev)->ctx.lock);
33 for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++)
34 lowpan_priv(dev)->ctx.table[i].id = i;
35
Alexander Aring92e17ee2015-12-15 12:25:35 +010036 ret = register_netdevice(dev);
Alexander Aringb1815fd2015-12-09 22:46:30 +010037 if (ret < 0)
38 return ret;
39
Alexander Aring92e17ee2015-12-15 12:25:35 +010040 ret = lowpan_dev_debugfs_init(dev);
Alexander Aringb1815fd2015-12-09 22:46:30 +010041 if (ret < 0)
Alexander Aring92e17ee2015-12-15 12:25:35 +010042 unregister_netdevice(dev);
Alexander Aringb1815fd2015-12-09 22:46:30 +010043
44 return ret;
Alexander Aringb72f6f52015-08-11 21:44:08 +020045}
Alexander Aring00f59312015-12-09 22:46:29 +010046EXPORT_SYMBOL(lowpan_register_netdevice);
47
48int lowpan_register_netdev(struct net_device *dev,
49 enum lowpan_lltypes lltype)
50{
51 int ret;
52
53 rtnl_lock();
54 ret = lowpan_register_netdevice(dev, lltype);
55 rtnl_unlock();
56 return ret;
57}
58EXPORT_SYMBOL(lowpan_register_netdev);
59
60void lowpan_unregister_netdevice(struct net_device *dev)
61{
62 unregister_netdevice(dev);
Alexander Aringb1815fd2015-12-09 22:46:30 +010063 lowpan_dev_debugfs_exit(dev);
Alexander Aring00f59312015-12-09 22:46:29 +010064}
65EXPORT_SYMBOL(lowpan_unregister_netdevice);
66
67void lowpan_unregister_netdev(struct net_device *dev)
68{
69 rtnl_lock();
70 lowpan_unregister_netdevice(dev);
71 rtnl_unlock();
72}
73EXPORT_SYMBOL(lowpan_unregister_netdev);
Alexander Aring4ae935c2015-08-11 21:44:09 +020074
Alexander Aring5609c182016-02-22 09:13:54 +010075static int lowpan_event(struct notifier_block *unused,
76 unsigned long event, void *ptr)
77{
78 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
79 int i;
80
81 if (dev->type != ARPHRD_6LOWPAN)
82 return NOTIFY_DONE;
83
84 switch (event) {
85 case NETDEV_DOWN:
86 for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++)
87 clear_bit(LOWPAN_IPHC_CTX_FLAG_ACTIVE,
88 &lowpan_priv(dev)->ctx.table[i].flags);
89 break;
90 default:
91 return NOTIFY_DONE;
92 }
93
94 return NOTIFY_OK;
95}
96
97static struct notifier_block lowpan_notifier = {
98 .notifier_call = lowpan_event,
99};
100
Alexander Aring4ae935c2015-08-11 21:44:09 +0200101static int __init lowpan_module_init(void)
102{
Alexander Aringb1815fd2015-12-09 22:46:30 +0100103 int ret;
104
105 ret = lowpan_debugfs_init();
106 if (ret < 0)
107 return ret;
108
Alexander Aring5609c182016-02-22 09:13:54 +0100109 ret = register_netdevice_notifier(&lowpan_notifier);
110 if (ret < 0) {
111 lowpan_debugfs_exit();
112 return ret;
113 }
114
Alexander Aring4ae935c2015-08-11 21:44:09 +0200115 request_module_nowait("ipv6");
116
117 request_module_nowait("nhc_dest");
118 request_module_nowait("nhc_fragment");
119 request_module_nowait("nhc_hop");
120 request_module_nowait("nhc_ipv6");
121 request_module_nowait("nhc_mobility");
122 request_module_nowait("nhc_routing");
123 request_module_nowait("nhc_udp");
124
125 return 0;
126}
Alexander Aringb1815fd2015-12-09 22:46:30 +0100127
128static void __exit lowpan_module_exit(void)
129{
130 lowpan_debugfs_exit();
Alexander Aring5609c182016-02-22 09:13:54 +0100131 unregister_netdevice_notifier(&lowpan_notifier);
Alexander Aringb1815fd2015-12-09 22:46:30 +0100132}
133
Alexander Aring4ae935c2015-08-11 21:44:09 +0200134module_init(lowpan_module_init);
Alexander Aringb1815fd2015-12-09 22:46:30 +0100135module_exit(lowpan_module_exit);
Alexander Aring4ae935c2015-08-11 21:44:09 +0200136
137MODULE_LICENSE("GPL");