blob: a2cbe61f6e653842215699ced523d7a0c6b6dfc0 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Userspace interface
3 * Linux ethernet bridge
4 *
5 * Authors:
6 * Lennert Buytenhek <buytenh@gnu.org>
7 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 */
13
14#include <linux/kernel.h>
15#include <linux/netdevice.h>
16#include <linux/ethtool.h>
17#include <linux/if_arp.h>
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/rtnetlink.h>
Kris Katterjohn46f25df2006-01-05 16:35:42 -080021#include <linux/if_ether.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <net/sock.h>
23
24#include "br_private.h"
25
26/*
27 * Determine initial path cost based on speed.
28 * using recommendations from 802.1d standard
29 *
Matthew Wilcox61a44b92007-07-31 14:00:02 -070030 * Since driver might sleep need to not be holding any locks.
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 */
Stephen Hemminger4433f422005-12-20 15:19:51 -080032static int port_cost(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070033{
Stephen Hemmingerb4a488d2007-08-30 22:16:22 -070034 if (dev->ethtool_ops && dev->ethtool_ops->get_settings) {
35 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET, };
36
37 if (!dev->ethtool_ops->get_settings(dev, &ecmd)) {
Matthew Wilcox61a44b92007-07-31 14:00:02 -070038 switch(ecmd.speed) {
Matthew Wilcox61a44b92007-07-31 14:00:02 -070039 case SPEED_10000:
40 return 2;
Stephen Hemmingerb4a488d2007-08-30 22:16:22 -070041 case SPEED_1000:
42 return 4;
43 case SPEED_100:
44 return 19;
Matthew Wilcox61a44b92007-07-31 14:00:02 -070045 case SPEED_10:
46 return 100;
47 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 }
49 }
50
51 /* Old silly heuristics based on name */
52 if (!strncmp(dev->name, "lec", 3))
53 return 7;
54
55 if (!strncmp(dev->name, "plip", 4))
56 return 2500;
57
58 return 100; /* assume old 10Mbps */
59}
60
Stephen Hemminger4433f422005-12-20 15:19:51 -080061
62/*
63 * Check for port carrier transistions.
64 * Called from work queue to allow for calling functions that
65 * might sleep (such as speed check), and to debounce.
66 */
Stephen Hemminger269def72007-02-22 01:10:18 -080067void br_port_carrier_check(struct net_bridge_port *p)
Stephen Hemminger4433f422005-12-20 15:19:51 -080068{
Stephen Hemminger269def72007-02-22 01:10:18 -080069 struct net_device *dev = p->dev;
70 struct net_bridge *br = p->br;
Stephen Hemmingerb3f1be42006-02-09 17:08:52 -080071
Stephen Hemminger6e86b892006-03-03 17:14:51 -080072 if (netif_carrier_ok(dev))
73 p->path_cost = port_cost(dev);
Stephen Hemminger4433f422005-12-20 15:19:51 -080074
Stephen Hemminger269def72007-02-22 01:10:18 -080075 if (netif_running(br->dev)) {
Stephen Hemminger6e86b892006-03-03 17:14:51 -080076 spin_lock_bh(&br->lock);
77 if (netif_carrier_ok(dev)) {
78 if (p->state == BR_STATE_DISABLED)
79 br_stp_enable_port(p);
80 } else {
81 if (p->state != BR_STATE_DISABLED)
82 br_stp_disable_port(p);
Stephen Hemminger4433f422005-12-20 15:19:51 -080083 }
Stephen Hemminger6e86b892006-03-03 17:14:51 -080084 spin_unlock_bh(&br->lock);
Stephen Hemminger4433f422005-12-20 15:19:51 -080085 }
Stephen Hemminger4433f422005-12-20 15:19:51 -080086}
87
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -080088static void release_nbp(struct kobject *kobj)
89{
90 struct net_bridge_port *p
91 = container_of(kobj, struct net_bridge_port, kobj);
92 kfree(p);
93}
94
95static struct kobj_type brport_ktype = {
96#ifdef CONFIG_SYSFS
97 .sysfs_ops = &brport_sysfs_ops,
98#endif
99 .release = release_nbp,
100};
101
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102static void destroy_nbp(struct net_bridge_port *p)
103{
104 struct net_device *dev = p->dev;
105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 p->br = NULL;
107 p->dev = NULL;
108 dev_put(dev);
109
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800110 kobject_put(&p->kobj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111}
112
113static void destroy_nbp_rcu(struct rcu_head *head)
114{
115 struct net_bridge_port *p =
116 container_of(head, struct net_bridge_port, rcu);
117 destroy_nbp(p);
118}
119
Stephen Hemminger3f4cfc22006-01-31 17:44:07 -0800120/* Delete port(interface) from bridge is done in two steps.
121 * via RCU. First step, marks device as down. That deletes
122 * all the timers and stops new packets from flowing through.
123 *
124 * Final cleanup doesn't occur until after all CPU's finished
125 * processing packets.
126 *
127 * Protected from multiple admin operations by RTNL mutex
128 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129static void del_nbp(struct net_bridge_port *p)
130{
131 struct net_bridge *br = p->br;
132 struct net_device *dev = p->dev;
133
Greg Kroah-Hartman43b98c42007-12-17 15:54:39 -0400134 sysfs_remove_link(br->ifobj, dev->name);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800135
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 dev_set_promiscuity(dev, -1);
137
138 spin_lock_bh(&br->lock);
139 br_stp_disable_port(p);
140 spin_unlock_bh(&br->lock);
141
Stephen Hemmingerb86c4502007-03-22 14:08:46 -0700142 br_ifinfo_notify(RTM_DELLINK, p);
143
Stephen Hemminger1a620692006-10-12 14:45:38 -0700144 br_fdb_delete_by_port(br, p, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146 list_del_rcu(&p->list);
147
Stephen Hemmingerb3f1be42006-02-09 17:08:52 -0800148 rcu_assign_pointer(dev->br_port, NULL);
149
Stephen Hemminger125a12c2006-03-03 17:16:15 -0800150 kobject_uevent(&p->kobj, KOBJ_REMOVE);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800151 kobject_del(&p->kobj);
152
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 call_rcu(&p->rcu, destroy_nbp_rcu);
154}
155
156/* called with RTNL */
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000157static void del_br(struct net_bridge *br, struct list_head *head)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158{
159 struct net_bridge_port *p, *n;
160
161 list_for_each_entry_safe(p, n, &br->port_list, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 del_nbp(p);
163 }
164
165 del_timer_sync(&br->gc_timer);
166
167 br_sysfs_delbr(br->dev);
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000168 unregister_netdevice_queue(br->dev, head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169}
170
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700171static struct net_device *new_bridge_dev(struct net *net, const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172{
173 struct net_bridge *br;
174 struct net_device *dev;
175
176 dev = alloc_netdev(sizeof(struct net_bridge), name,
177 br_dev_setup);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900178
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 if (!dev)
180 return NULL;
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700181 dev_net_set(dev, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
183 br = netdev_priv(dev);
184 br->dev = dev;
185
186 spin_lock_init(&br->lock);
187 INIT_LIST_HEAD(&br->port_list);
188 spin_lock_init(&br->hash_lock);
189
190 br->bridge_id.prio[0] = 0x80;
191 br->bridge_id.prio[1] = 0x00;
Stephen Hemmingercee48542006-03-20 22:57:03 -0800192
193 memcpy(br->group_addr, br_group_address, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194
Stephen Hemmingeredb5e462005-12-21 19:00:58 -0800195 br->feature_mask = dev->features;
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700196 br->stp_enabled = BR_NO_STP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 br->designated_root = br->bridge_id;
198 br->root_path_cost = 0;
199 br->root_port = 0;
200 br->bridge_max_age = br->max_age = 20 * HZ;
201 br->bridge_hello_time = br->hello_time = 2 * HZ;
202 br->bridge_forward_delay = br->forward_delay = 15 * HZ;
203 br->topology_change = 0;
204 br->topology_change_detected = 0;
205 br->ageing_time = 300 * HZ;
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700206
207 br_netfilter_rtable_init(br);
208
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 INIT_LIST_HEAD(&br->age_list);
210
211 br_stp_timer_init(br);
212
213 return dev;
214}
215
216/* find an available port number */
217static int find_portno(struct net_bridge *br)
218{
219 int index;
220 struct net_bridge_port *p;
221 unsigned long *inuse;
222
Stephen Hemminger3b781fa2006-03-20 22:56:50 -0800223 inuse = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 GFP_KERNEL);
225 if (!inuse)
226 return -ENOMEM;
227
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 set_bit(0, inuse); /* zero is reserved */
229 list_for_each_entry(p, &br->port_list, list) {
230 set_bit(p->port_no, inuse);
231 }
232 index = find_first_zero_bit(inuse, BR_MAX_PORTS);
233 kfree(inuse);
234
235 return (index >= BR_MAX_PORTS) ? -EXFULL : index;
236}
237
Stephen Hemminger4433f422005-12-20 15:19:51 -0800238/* called with RTNL but without bridge lock */
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900239static struct net_bridge_port *new_nbp(struct net_bridge *br,
Stephen Hemminger4433f422005-12-20 15:19:51 -0800240 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241{
242 int index;
243 struct net_bridge_port *p;
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900244
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 index = find_portno(br);
246 if (index < 0)
247 return ERR_PTR(index);
248
Stephen Hemmingercee48542006-03-20 22:57:03 -0800249 p = kzalloc(sizeof(*p), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 if (p == NULL)
251 return ERR_PTR(-ENOMEM);
252
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 p->br = br;
254 dev_hold(dev);
255 p->dev = dev;
Stephen Hemminger4433f422005-12-20 15:19:51 -0800256 p->path_cost = port_cost(dev);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900257 p->priority = 0x8000 >> BR_PORT_BITS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 p->port_no = index;
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000259 p->flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 br_init_port(p);
261 p->state = BR_STATE_DISABLED;
Stephen Hemmingerd32439c2006-03-03 17:15:34 -0800262 br_stp_port_timer_init(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
264 return p;
265}
266
Marcel Holtmann384912e2009-08-31 21:08:19 +0000267static struct device_type br_type = {
268 .name = "bridge",
269};
270
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700271int br_add_bridge(struct net *net, const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272{
273 struct net_device *dev;
274 int ret;
275
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700276 dev = new_bridge_dev(net, name);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900277 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 return -ENOMEM;
279
280 rtnl_lock();
281 if (strchr(dev->name, '%')) {
282 ret = dev_alloc_name(dev, dev->name);
Pavel Emelyanove340a902008-05-04 17:58:07 -0700283 if (ret < 0)
284 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 }
286
Marcel Holtmann384912e2009-08-31 21:08:19 +0000287 SET_NETDEV_DEVTYPE(dev, &br_type);
288
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 ret = register_netdevice(dev);
Pavel Emelyanove340a902008-05-04 17:58:07 -0700290 if (ret)
291 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 ret = br_sysfs_addbr(dev);
Stephen Hemmingerac052022006-05-10 13:21:53 -0700294 if (ret)
Jiri Benc36485702006-06-05 16:39:34 -0700295 unregister_netdevice(dev);
296 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 rtnl_unlock();
Stephen Hemmingerac052022006-05-10 13:21:53 -0700298 return ret;
Pavel Emelyanove340a902008-05-04 17:58:07 -0700299
300out_free:
301 free_netdev(dev);
302 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303}
304
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700305int br_del_bridge(struct net *net, const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306{
307 struct net_device *dev;
308 int ret = 0;
309
310 rtnl_lock();
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700311 dev = __dev_get_by_name(net, name);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900312 if (dev == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 ret = -ENXIO; /* Could not find device */
314
315 else if (!(dev->priv_flags & IFF_EBRIDGE)) {
316 /* Attempt to delete non bridge device! */
317 ret = -EPERM;
318 }
319
320 else if (dev->flags & IFF_UP) {
321 /* Not shutdown yet. */
322 ret = -EBUSY;
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900323 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900325 else
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000326 del_br(netdev_priv(dev), NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
328 rtnl_unlock();
329 return ret;
330}
331
Kris Katterjohn46f25df2006-01-05 16:35:42 -0800332/* MTU of the bridge pseudo-device: ETH_DATA_LEN or the minimum of the ports */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333int br_min_mtu(const struct net_bridge *br)
334{
335 const struct net_bridge_port *p;
336 int mtu = 0;
337
338 ASSERT_RTNL();
339
340 if (list_empty(&br->port_list))
Kris Katterjohn46f25df2006-01-05 16:35:42 -0800341 mtu = ETH_DATA_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 else {
343 list_for_each_entry(p, &br->port_list, list) {
344 if (!mtu || p->dev->mtu < mtu)
345 mtu = p->dev->mtu;
346 }
347 }
348 return mtu;
349}
350
Stephen Hemminger81d35302005-05-29 14:15:17 -0700351/*
352 * Recomputes features using slave's features
353 */
354void br_features_recompute(struct net_bridge *br)
355{
356 struct net_bridge_port *p;
Herbert Xub63365a2008-10-23 01:11:29 -0700357 unsigned long features, mask;
Stephen Hemminger81d35302005-05-29 14:15:17 -0700358
Herbert Xub63365a2008-10-23 01:11:29 -0700359 features = mask = br->feature_mask;
360 if (list_empty(&br->port_list))
361 goto done;
362
363 features &= ~NETIF_F_ONE_FOR_ALL;
Stephen Hemminger81d35302005-05-29 14:15:17 -0700364
365 list_for_each_entry(p, &br->port_list, list) {
Herbert Xub63365a2008-10-23 01:11:29 -0700366 features = netdev_increment_features(features,
367 p->dev->features, mask);
Stephen Hemminger81d35302005-05-29 14:15:17 -0700368 }
369
Herbert Xub63365a2008-10-23 01:11:29 -0700370done:
371 br->dev->features = netdev_fix_features(features, NULL);
Stephen Hemminger81d35302005-05-29 14:15:17 -0700372}
373
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374/* called with RTNL */
375int br_add_if(struct net_bridge *br, struct net_device *dev)
376{
377 struct net_bridge_port *p;
378 int err = 0;
379
Stephen Hemminger1056bd52009-11-05 20:46:52 -0800380 /* Don't allow bridging non-ethernet like devices */
381 if ((dev->flags & IFF_LOOPBACK) ||
382 dev->type != ARPHRD_ETHER || dev->addr_len != ETH_ALEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 return -EINVAL;
384
Stephen Hemminger1056bd52009-11-05 20:46:52 -0800385 /* No bridging of bridges */
Stephen Hemminger00829822008-11-20 20:14:53 -0800386 if (dev->netdev_ops->ndo_start_xmit == br_dev_xmit)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 return -ELOOP;
388
Stephen Hemminger1056bd52009-11-05 20:46:52 -0800389 /* Device is already being bridged */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 if (dev->br_port != NULL)
391 return -EBUSY;
392
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100393 /* No bridging devices that dislike that (e.g. wireless) */
394 if (dev->priv_flags & IFF_DONT_BRIDGE)
395 return -EOPNOTSUPP;
396
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800397 p = new_nbp(br, dev);
398 if (IS_ERR(p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 return PTR_ERR(p);
400
Wang Chenbc3f9072008-07-14 20:53:13 -0700401 err = dev_set_promiscuity(dev, 1);
402 if (err)
403 goto put_back;
404
Greg Kroah-Hartmane32cc732007-12-17 23:05:35 -0700405 err = kobject_init_and_add(&p->kobj, &brport_ktype, &(dev->dev.kobj),
406 SYSFS_BRIDGE_PORT_ATTR);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800407 if (err)
408 goto err0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900410 err = br_fdb_insert(br, p, dev->dev_addr);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800411 if (err)
412 goto err1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800414 err = br_sysfs_addif(p);
415 if (err)
416 goto err2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800418 rcu_assign_pointer(dev->br_port, p);
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700419 dev_disable_lro(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800421 list_add_rcu(&p->list, &br->port_list);
422
423 spin_lock_bh(&br->lock);
424 br_stp_recalculate_bridge_id(br);
425 br_features_recompute(br);
Aji Srinivasde790592007-03-07 16:10:53 -0800426
427 if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) &&
428 (br->dev->flags & IFF_UP))
429 br_stp_enable_port(p);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800430 spin_unlock_bh(&br->lock);
431
Stephen Hemmingerb86c4502007-03-22 14:08:46 -0700432 br_ifinfo_notify(RTM_NEWLINK, p);
433
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800434 dev_set_mtu(br->dev, br_min_mtu(br));
Stephen Hemminger269def72007-02-22 01:10:18 -0800435
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800436 kobject_uevent(&p->kobj, KOBJ_ADD);
437
438 return 0;
439err2:
Stephen Hemminger1a620692006-10-12 14:45:38 -0700440 br_fdb_delete_by_port(br, p, 1);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800441err1:
Xiaotian Fengc587aea2009-07-23 23:06:32 +0000442 kobject_put(&p->kobj);
Jeff Hansen30df94f2009-09-28 12:54:25 -0700443 p = NULL; /* kobject_put frees */
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800444err0:
Wang Chenbc3f9072008-07-14 20:53:13 -0700445 dev_set_promiscuity(dev, -1);
Volodymyr G Lukiianyk43af8532008-04-29 03:17:42 -0700446put_back:
447 dev_put(dev);
Wang Chenbc3f9072008-07-14 20:53:13 -0700448 kfree(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 return err;
450}
451
452/* called with RTNL */
453int br_del_if(struct net_bridge *br, struct net_device *dev)
454{
455 struct net_bridge_port *p = dev->br_port;
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900456
457 if (!p || p->br != br)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 return -EINVAL;
459
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 del_nbp(p);
461
462 spin_lock_bh(&br->lock);
463 br_stp_recalculate_bridge_id(br);
Stephen Hemminger81d35302005-05-29 14:15:17 -0700464 br_features_recompute(br);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 spin_unlock_bh(&br->lock);
466
467 return 0;
468}
469
Alexey Dobriyan712d6952008-09-08 16:20:18 -0700470void br_net_exit(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471{
Patrick McHardyab1b2042008-07-03 03:53:42 -0700472 struct net_device *dev;
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000473 LIST_HEAD(list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
475 rtnl_lock();
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000476 for_each_netdev(net, dev)
477 if (dev->priv_flags & IFF_EBRIDGE)
478 del_br(netdev_priv(dev), &list);
479
480 unregister_netdevice_many(&list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 rtnl_unlock();
482
483}