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b72f6f51 AA |
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 | ||
4ae935c1 AA |
14 | #include <linux/module.h> |
15 | ||
b72f6f51 AA |
16 | #include <net/6lowpan.h> |
17 | ||
b1815fd9 AA |
18 | #include "6lowpan_i.h" |
19 | ||
00f59314 AA |
20 | int lowpan_register_netdevice(struct net_device *dev, |
21 | enum lowpan_lltypes lltype) | |
b72f6f51 | 22 | { |
5609c185 | 23 | int i, ret; |
b1815fd9 | 24 | |
4d6a6aed AA |
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 | ||
2e4d60cb | 30 | lowpan_dev(dev)->lltype = lltype; |
00f59314 | 31 | |
2e4d60cb | 32 | spin_lock_init(&lowpan_dev(dev)->ctx.lock); |
5609c185 | 33 | for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++) |
2e4d60cb | 34 | lowpan_dev(dev)->ctx.table[i].id = i; |
5609c185 | 35 | |
92e17ee7 | 36 | ret = register_netdevice(dev); |
b1815fd9 AA |
37 | if (ret < 0) |
38 | return ret; | |
39 | ||
92e17ee7 | 40 | ret = lowpan_dev_debugfs_init(dev); |
b1815fd9 | 41 | if (ret < 0) |
92e17ee7 | 42 | unregister_netdevice(dev); |
b1815fd9 AA |
43 | |
44 | return ret; | |
00f59314 AA |
45 | } |
46 | EXPORT_SYMBOL(lowpan_register_netdevice); | |
47 | ||
48 | int 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 | } | |
58 | EXPORT_SYMBOL(lowpan_register_netdev); | |
59 | ||
60 | void lowpan_unregister_netdevice(struct net_device *dev) | |
61 | { | |
62 | unregister_netdevice(dev); | |
b1815fd9 | 63 | lowpan_dev_debugfs_exit(dev); |
00f59314 AA |
64 | } |
65 | EXPORT_SYMBOL(lowpan_unregister_netdevice); | |
66 | ||
67 | void lowpan_unregister_netdev(struct net_device *dev) | |
68 | { | |
69 | rtnl_lock(); | |
70 | lowpan_unregister_netdevice(dev); | |
71 | rtnl_unlock(); | |
b72f6f51 | 72 | } |
00f59314 | 73 | EXPORT_SYMBOL(lowpan_unregister_netdev); |
4ae935c1 | 74 | |
5609c185 AA |
75 | static 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, | |
2e4d60cb | 88 | &lowpan_dev(dev)->ctx.table[i].flags); |
5609c185 AA |
89 | break; |
90 | default: | |
91 | return NOTIFY_DONE; | |
92 | } | |
93 | ||
94 | return NOTIFY_OK; | |
95 | } | |
96 | ||
97 | static struct notifier_block lowpan_notifier = { | |
98 | .notifier_call = lowpan_event, | |
99 | }; | |
100 | ||
4ae935c1 AA |
101 | static int __init lowpan_module_init(void) |
102 | { | |
b1815fd9 AA |
103 | int ret; |
104 | ||
105 | ret = lowpan_debugfs_init(); | |
106 | if (ret < 0) | |
107 | return ret; | |
108 | ||
5609c185 AA |
109 | ret = register_netdevice_notifier(&lowpan_notifier); |
110 | if (ret < 0) { | |
111 | lowpan_debugfs_exit(); | |
112 | return ret; | |
113 | } | |
114 | ||
4ae935c1 AA |
115 | 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 | } | |
b1815fd9 AA |
127 | |
128 | static void __exit lowpan_module_exit(void) | |
129 | { | |
130 | lowpan_debugfs_exit(); | |
5609c185 | 131 | unregister_netdevice_notifier(&lowpan_notifier); |
b1815fd9 AA |
132 | } |
133 | ||
4ae935c1 | 134 | module_init(lowpan_module_init); |
b1815fd9 | 135 | module_exit(lowpan_module_exit); |
4ae935c1 AA |
136 | |
137 | MODULE_LICENSE("GPL"); |