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Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/eth_media.c: Ethernet bearer support for TIPC
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09003 *
Allan Stephensf3ec75f2007-06-10 17:24:20 -07004 * Copyright (c) 2001-2007, Ericsson AB
Allan Stephensbcd326e2011-05-27 13:59:17 -04005 * Copyright (c) 2005-2008, 2011, Wind River Systems
Per Lidenb97bf3f2006-01-02 19:04:38 +01006 * All rights reserved.
7 *
Per Liden9ea1fd32006-01-11 13:30:43 +01008 * Redistribution and use in source and binary forms, with or without
Per Lidenb97bf3f2006-01-02 19:04:38 +01009 * modification, are permitted provided that the following conditions are met:
10 *
Per Liden9ea1fd32006-01-11 13:30:43 +010011 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
Per Lidenb97bf3f2006-01-02 19:04:38 +010019 *
Per Liden9ea1fd32006-01-11 13:30:43 +010020 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
Per Lidenb97bf3f2006-01-02 19:04:38 +010034 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
Allan Stephensd265fef2010-11-30 12:00:53 +000037#include "core.h"
38#include "bearer.h"
39
Allan Stephens909234c2011-05-27 15:09:40 -040040#define MAX_ETH_BEARERS MAX_BEARERS
Per Lidenb97bf3f2006-01-02 19:04:38 +010041
Allan Stephens4d163a32011-10-07 13:37:34 -040042#define ETH_ADDR_OFFSET 4 /* message header offset of MAC address */
43
Per Lidenb97bf3f2006-01-02 19:04:38 +010044/**
45 * struct eth_bearer - Ethernet bearer data structure
46 * @bearer: ptr to associated "generic" bearer structure
47 * @dev: ptr to associated Ethernet network device
48 * @tipc_packet_type: used in binding TIPC to Ethernet driver
Ying Xue4225a392012-08-16 12:09:07 +000049 * @setup: work item used when enabling bearer
Allan Stephens64b32f72011-10-19 15:18:11 -040050 * @cleanup: work item used when disabling bearer
Per Lidenb97bf3f2006-01-02 19:04:38 +010051 */
Per Lidenb97bf3f2006-01-02 19:04:38 +010052struct eth_bearer {
53 struct tipc_bearer *bearer;
54 struct net_device *dev;
55 struct packet_type tipc_packet_type;
Ying Xue4225a392012-08-16 12:09:07 +000056 struct work_struct setup;
Allan Stephens64b32f72011-10-19 15:18:11 -040057 struct work_struct cleanup;
Per Lidenb97bf3f2006-01-02 19:04:38 +010058};
59
Paul Gortmaker358a0d12011-12-29 20:19:42 -050060static struct tipc_media eth_media_info;
Per Lidenb97bf3f2006-01-02 19:04:38 +010061static struct eth_bearer eth_bearers[MAX_ETH_BEARERS];
Allan Stephense3ec9c72010-12-31 18:59:34 +000062static int eth_started;
Ying Xuefa7f86f2012-08-16 12:09:06 +000063
64static int recv_notification(struct notifier_block *nb, unsigned long evt,
Paul Gortmakerae8509c2013-06-17 10:54:47 -040065 void *dv);
Ying Xuefa7f86f2012-08-16 12:09:06 +000066/*
67 * Network device notifier info
68 */
69static struct notifier_block notifier = {
70 .notifier_call = recv_notification,
71 .priority = 0
72};
Per Lidenb97bf3f2006-01-02 19:04:38 +010073
74/**
Allan Stephens4d163a32011-10-07 13:37:34 -040075 * eth_media_addr_set - initialize Ethernet media address structure
Allan Stephens3d749a62011-10-07 15:19:11 -040076 *
77 * Media-dependent "value" field stores MAC address in first 6 bytes
78 * and zeroes out the remaining bytes.
Allan Stephens4d163a32011-10-07 13:37:34 -040079 */
Patrick McHardy8aeb89f2013-04-17 06:18:26 +000080static void eth_media_addr_set(const struct tipc_bearer *tb_ptr,
81 struct tipc_media_addr *a, char *mac)
Allan Stephens4d163a32011-10-07 13:37:34 -040082{
Allan Stephens3d749a62011-10-07 15:19:11 -040083 memcpy(a->value, mac, ETH_ALEN);
84 memset(a->value + ETH_ALEN, 0, sizeof(a->value) - ETH_ALEN);
85 a->media_id = TIPC_MEDIA_TYPE_ETH;
Patrick McHardy8aeb89f2013-04-17 06:18:26 +000086 a->broadcast = !memcmp(mac, tb_ptr->bcast_addr.value, ETH_ALEN);
Allan Stephens4d163a32011-10-07 13:37:34 -040087}
88
89/**
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +090090 * send_msg - send a TIPC message out over an Ethernet interface
Per Lidenb97bf3f2006-01-02 19:04:38 +010091 */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +090092static int send_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr,
Per Lidenb97bf3f2006-01-02 19:04:38 +010093 struct tipc_media_addr *dest)
94{
95 struct sk_buff *clone;
96 struct net_device *dev;
Allan Stephens9fbfca02010-09-03 08:33:40 +000097 int delta;
Per Lidenb97bf3f2006-01-02 19:04:38 +010098
99 clone = skb_clone(buf, GFP_ATOMIC);
Allan Stephens9fbfca02010-09-03 08:33:40 +0000100 if (!clone)
101 return 0;
102
103 dev = ((struct eth_bearer *)(tb_ptr->usr_handle))->dev;
104 delta = dev->hard_header_len - skb_headroom(buf);
105
106 if ((delta > 0) &&
107 pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
108 kfree_skb(clone);
109 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100110 }
Allan Stephens9fbfca02010-09-03 08:33:40 +0000111
112 skb_reset_network_header(clone);
113 clone->dev = dev;
Patrick McHardy76f5c6f2013-04-17 06:18:27 +0000114 clone->protocol = htons(ETH_P_TIPC);
Allan Stephens3d749a62011-10-07 15:19:11 -0400115 dev_hard_header(clone, dev, ETH_P_TIPC, dest->value,
Allan Stephens9fbfca02010-09-03 08:33:40 +0000116 dev->dev_addr, clone->len);
117 dev_queue_xmit(clone);
Allan Stephens0e35fd52008-07-14 22:44:01 -0700118 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100119}
120
121/**
122 * recv_msg - handle incoming TIPC message from an Ethernet interface
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900123 *
Allan Stephensf3ec75f2007-06-10 17:24:20 -0700124 * Accept only packets explicitly sent to this node, or broadcast packets;
125 * ignores packets sent using Ethernet multicast, and traffic sent to other
126 * nodes (which can happen if interface is running in promiscuous mode).
Per Lidenb97bf3f2006-01-02 19:04:38 +0100127 */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900128static int recv_msg(struct sk_buff *buf, struct net_device *dev,
Per Lidenb97bf3f2006-01-02 19:04:38 +0100129 struct packet_type *pt, struct net_device *orig_dev)
130{
131 struct eth_bearer *eb_ptr = (struct eth_bearer *)pt->af_packet_priv;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100132
YOSHIFUJI Hideaki721499e2008-07-19 22:34:43 -0700133 if (!net_eq(dev_net(dev), &init_net)) {
Eric W. Biedermane730c152007-09-17 11:53:39 -0700134 kfree_skb(buf);
135 return 0;
136 }
137
Per Lidenb97bf3f2006-01-02 19:04:38 +0100138 if (likely(eb_ptr->bearer)) {
Allan Stephensf3ec75f2007-06-10 17:24:20 -0700139 if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
Paul Gortmakerb2abd4c2010-09-08 13:31:24 +0000140 buf->next = NULL;
141 tipc_recv_msg(buf, eb_ptr->bearer);
142 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100143 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100144 }
Jon Maloy5e3c8852006-06-25 23:36:43 -0700145 kfree_skb(buf);
Allan Stephens0e35fd52008-07-14 22:44:01 -0700146 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100147}
148
149/**
Ying Xue4225a392012-08-16 12:09:07 +0000150 * setup_bearer - setup association between Ethernet bearer and interface
151 */
152static void setup_bearer(struct work_struct *work)
153{
154 struct eth_bearer *eb_ptr =
155 container_of(work, struct eth_bearer, setup);
156
157 dev_add_pack(&eb_ptr->tipc_packet_type);
158}
159
160/**
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900161 * enable_bearer - attach TIPC bearer to an Ethernet interface
Per Lidenb97bf3f2006-01-02 19:04:38 +0100162 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100163static int enable_bearer(struct tipc_bearer *tb_ptr)
164{
Ying Xue2537af92013-06-17 10:54:51 -0400165 struct net_device *dev;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100166 struct eth_bearer *eb_ptr = &eth_bearers[0];
167 struct eth_bearer *stop = &eth_bearers[MAX_ETH_BEARERS];
168 char *driver_name = strchr((const char *)tb_ptr->name, ':') + 1;
Allan Stephensd1fb6272010-09-03 08:33:42 +0000169 int pending_dev = 0;
170
171 /* Find unused Ethernet bearer structure */
Allan Stephensd1fb6272010-09-03 08:33:42 +0000172 while (eb_ptr->dev) {
173 if (!eb_ptr->bearer)
174 pending_dev++;
175 if (++eb_ptr == stop)
176 return pending_dev ? -EAGAIN : -EDQUOT;
177 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100178
179 /* Find device with specified name */
Ying Xue2537af92013-06-17 10:54:51 -0400180 dev = dev_get_by_name(&init_net, driver_name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100181 if (!dev)
182 return -ENODEV;
183
Allan Stephens18abf0f2011-05-27 14:02:48 -0400184 /* Create Ethernet bearer for device */
Allan Stephens18abf0f2011-05-27 14:02:48 -0400185 eb_ptr->dev = dev;
186 eb_ptr->tipc_packet_type.type = htons(ETH_P_TIPC);
187 eb_ptr->tipc_packet_type.dev = dev;
188 eb_ptr->tipc_packet_type.func = recv_msg;
189 eb_ptr->tipc_packet_type.af_packet_priv = eb_ptr;
190 INIT_LIST_HEAD(&(eb_ptr->tipc_packet_type.list));
Ying Xue4225a392012-08-16 12:09:07 +0000191 INIT_WORK(&eb_ptr->setup, setup_bearer);
192 schedule_work(&eb_ptr->setup);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100193
194 /* Associate TIPC bearer with Ethernet bearer */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100195 eb_ptr->bearer = tb_ptr;
196 tb_ptr->usr_handle = (void *)eb_ptr;
Patrick McHardy8aeb89f2013-04-17 06:18:26 +0000197 memset(tb_ptr->bcast_addr.value, 0, sizeof(tb_ptr->bcast_addr.value));
198 memcpy(tb_ptr->bcast_addr.value, dev->broadcast, ETH_ALEN);
199 tb_ptr->bcast_addr.media_id = TIPC_MEDIA_TYPE_ETH;
200 tb_ptr->bcast_addr.broadcast = 1;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100201 tb_ptr->mtu = dev->mtu;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900202 tb_ptr->blocked = 0;
Patrick McHardy8aeb89f2013-04-17 06:18:26 +0000203 eth_media_addr_set(tb_ptr, &tb_ptr->addr, (char *)dev->dev_addr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100204 return 0;
205}
206
207/**
Allan Stephens64b32f72011-10-19 15:18:11 -0400208 * cleanup_bearer - break association between Ethernet bearer and interface
209 *
210 * This routine must be invoked from a work queue because it can sleep.
211 */
Allan Stephens64b32f72011-10-19 15:18:11 -0400212static void cleanup_bearer(struct work_struct *work)
213{
214 struct eth_bearer *eb_ptr =
215 container_of(work, struct eth_bearer, cleanup);
216
217 dev_remove_pack(&eb_ptr->tipc_packet_type);
218 dev_put(eb_ptr->dev);
219 eb_ptr->dev = NULL;
220}
221
222/**
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900223 * disable_bearer - detach TIPC bearer from an Ethernet interface
Per Lidenb97bf3f2006-01-02 19:04:38 +0100224 *
Allan Stephens64b32f72011-10-19 15:18:11 -0400225 * Mark Ethernet bearer as inactive so that incoming buffers are thrown away,
226 * then get worker thread to complete bearer cleanup. (Can't do cleanup
227 * here because cleanup code needs to sleep and caller holds spinlocks.)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100228 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100229static void disable_bearer(struct tipc_bearer *tb_ptr)
230{
Allan Stephens64b32f72011-10-19 15:18:11 -0400231 struct eth_bearer *eb_ptr = (struct eth_bearer *)tb_ptr->usr_handle;
232
233 eb_ptr->bearer = NULL;
234 INIT_WORK(&eb_ptr->cleanup, cleanup_bearer);
235 schedule_work(&eb_ptr->cleanup);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100236}
237
238/**
239 * recv_notification - handle device updates from OS
240 *
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900241 * Change the state of the Ethernet bearer (if any) associated with the
Per Lidenb97bf3f2006-01-02 19:04:38 +0100242 * specified device.
243 */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900244static int recv_notification(struct notifier_block *nb, unsigned long evt,
Jiri Pirko351638e2013-05-28 01:30:21 +0000245 void *ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100246{
Jiri Pirko351638e2013-05-28 01:30:21 +0000247 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100248 struct eth_bearer *eb_ptr = &eth_bearers[0];
249 struct eth_bearer *stop = &eth_bearers[MAX_ETH_BEARERS];
250
YOSHIFUJI Hideaki721499e2008-07-19 22:34:43 -0700251 if (!net_eq(dev_net(dev), &init_net))
Eric W. Biedermane9dc8652007-09-12 13:02:17 +0200252 return NOTIFY_DONE;
253
Per Lidenb97bf3f2006-01-02 19:04:38 +0100254 while ((eb_ptr->dev != dev)) {
255 if (++eb_ptr == stop)
256 return NOTIFY_DONE; /* couldn't find device */
257 }
258 if (!eb_ptr->bearer)
259 return NOTIFY_DONE; /* bearer had been disabled */
260
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900261 eb_ptr->bearer->mtu = dev->mtu;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100262
263 switch (evt) {
264 case NETDEV_CHANGE:
265 if (netif_carrier_ok(dev))
266 tipc_continue(eb_ptr->bearer);
267 else
268 tipc_block_bearer(eb_ptr->bearer->name);
269 break;
270 case NETDEV_UP:
271 tipc_continue(eb_ptr->bearer);
272 break;
273 case NETDEV_DOWN:
274 tipc_block_bearer(eb_ptr->bearer->name);
275 break;
276 case NETDEV_CHANGEMTU:
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900277 case NETDEV_CHANGEADDR:
Per Lidenb97bf3f2006-01-02 19:04:38 +0100278 tipc_block_bearer(eb_ptr->bearer->name);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900279 tipc_continue(eb_ptr->bearer);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100280 break;
281 case NETDEV_UNREGISTER:
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900282 case NETDEV_CHANGENAME:
Per Lidenb97bf3f2006-01-02 19:04:38 +0100283 tipc_disable_bearer(eb_ptr->bearer->name);
284 break;
285 }
286 return NOTIFY_OK;
287}
288
289/**
290 * eth_addr2str - convert Ethernet address to string
291 */
Allan Stephensc61b6662011-10-07 11:31:49 -0400292static int eth_addr2str(struct tipc_media_addr *a, char *str_buf, int str_size)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900293{
Allan Stephensc61b6662011-10-07 11:31:49 -0400294 if (str_size < 18) /* 18 = strlen("aa:bb:cc:dd:ee:ff\0") */
295 return 1;
296
Allan Stephens3d749a62011-10-07 15:19:11 -0400297 sprintf(str_buf, "%pM", a->value);
Allan Stephensc61b6662011-10-07 11:31:49 -0400298 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100299}
300
Allan Stephens4d163a32011-10-07 13:37:34 -0400301/**
Allan Stephens4d163a32011-10-07 13:37:34 -0400302 * eth_str2addr - convert Ethernet address format to message header format
303 */
Allan Stephens4d163a32011-10-07 13:37:34 -0400304static int eth_addr2msg(struct tipc_media_addr *a, char *msg_area)
305{
306 memset(msg_area, 0, TIPC_MEDIA_ADDR_SIZE);
307 msg_area[TIPC_MEDIA_TYPE_OFFSET] = TIPC_MEDIA_TYPE_ETH;
Allan Stephens3d749a62011-10-07 15:19:11 -0400308 memcpy(msg_area + ETH_ADDR_OFFSET, a->value, ETH_ALEN);
Allan Stephens4d163a32011-10-07 13:37:34 -0400309 return 0;
310}
311
312/**
313 * eth_str2addr - convert message header address format to Ethernet format
314 */
Patrick McHardy8aeb89f2013-04-17 06:18:26 +0000315static int eth_msg2addr(const struct tipc_bearer *tb_ptr,
316 struct tipc_media_addr *a, char *msg_area)
Allan Stephens4d163a32011-10-07 13:37:34 -0400317{
318 if (msg_area[TIPC_MEDIA_TYPE_OFFSET] != TIPC_MEDIA_TYPE_ETH)
319 return 1;
320
Patrick McHardy8aeb89f2013-04-17 06:18:26 +0000321 eth_media_addr_set(tb_ptr, a, msg_area + ETH_ADDR_OFFSET);
Allan Stephens4d163a32011-10-07 13:37:34 -0400322 return 0;
323}
324
Allan Stephens706767d2011-10-06 15:28:44 -0400325/*
326 * Ethernet media registration info
327 */
Paul Gortmaker358a0d12011-12-29 20:19:42 -0500328static struct tipc_media eth_media_info = {
Allan Stephens706767d2011-10-06 15:28:44 -0400329 .send_msg = send_msg,
330 .enable_bearer = enable_bearer,
331 .disable_bearer = disable_bearer,
332 .addr2str = eth_addr2str,
Allan Stephens4d163a32011-10-07 13:37:34 -0400333 .addr2msg = eth_addr2msg,
334 .msg2addr = eth_msg2addr,
Allan Stephens706767d2011-10-06 15:28:44 -0400335 .priority = TIPC_DEF_LINK_PRI,
336 .tolerance = TIPC_DEF_LINK_TOL,
337 .window = TIPC_DEF_LINK_WIN,
338 .type_id = TIPC_MEDIA_TYPE_ETH,
339 .name = "eth"
340};
341
Per Lidenb97bf3f2006-01-02 19:04:38 +0100342/**
Per Liden4323add2006-01-18 00:38:21 +0100343 * tipc_eth_media_start - activate Ethernet bearer support
Per Lidenb97bf3f2006-01-02 19:04:38 +0100344 *
345 * Register Ethernet media type with TIPC bearer code. Also register
346 * with OS for notifications about device state changes.
347 */
Per Liden4323add2006-01-18 00:38:21 +0100348int tipc_eth_media_start(void)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900349{
Per Lidenb97bf3f2006-01-02 19:04:38 +0100350 int res;
351
352 if (eth_started)
353 return -EINVAL;
354
Allan Stephens706767d2011-10-06 15:28:44 -0400355 res = tipc_register_media(&eth_media_info);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100356 if (res)
357 return res;
358
Per Lidenb97bf3f2006-01-02 19:04:38 +0100359 res = register_netdevice_notifier(&notifier);
360 if (!res)
361 eth_started = 1;
362 return res;
363}
364
365/**
Per Liden4323add2006-01-18 00:38:21 +0100366 * tipc_eth_media_stop - deactivate Ethernet bearer support
Per Lidenb97bf3f2006-01-02 19:04:38 +0100367 */
Per Liden4323add2006-01-18 00:38:21 +0100368void tipc_eth_media_stop(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100369{
Per Lidenb97bf3f2006-01-02 19:04:38 +0100370 if (!eth_started)
371 return;
372
Allan Stephens64b32f72011-10-19 15:18:11 -0400373 flush_scheduled_work();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100374 unregister_netdevice_notifier(&notifier);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100375 eth_started = 0;
376}