blob: 0a942fbccc9a64592d486199608e6527ebc8de8f [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>
stephen hemminger77f98592011-09-30 14:37:26 +000016#include <linux/etherdevice.h>
WANG Congc06ee962010-05-06 00:48:24 -070017#include <linux/netpoll.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/ethtool.h>
19#include <linux/if_arp.h>
20#include <linux/module.h>
21#include <linux/init.h>
22#include <linux/rtnetlink.h>
Kris Katterjohn46f25df2006-01-05 16:35:42 -080023#include <linux/if_ether.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090024#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <net/sock.h>
26
27#include "br_private.h"
28
29/*
30 * Determine initial path cost based on speed.
31 * using recommendations from 802.1d standard
32 *
Matthew Wilcox61a44b92007-07-31 14:00:02 -070033 * Since driver might sleep need to not be holding any locks.
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 */
Stephen Hemminger4433f422005-12-20 15:19:51 -080035static int port_cost(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070036{
Jiri Pirkofa3df922011-09-01 03:29:38 +000037 struct ethtool_cmd ecmd;
Stephen Hemmingerb4a488d2007-08-30 22:16:22 -070038
Jiri Pirko4bc71cb2011-09-03 03:34:30 +000039 if (!__ethtool_get_settings(dev, &ecmd)) {
Jiri Pirkofa3df922011-09-01 03:29:38 +000040 switch (ethtool_cmd_speed(&ecmd)) {
41 case SPEED_10000:
42 return 2;
43 case SPEED_1000:
44 return 4;
45 case SPEED_100:
46 return 19;
47 case SPEED_10:
48 return 100;
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 }
50 }
51
52 /* Old silly heuristics based on name */
53 if (!strncmp(dev->name, "lec", 3))
54 return 7;
55
56 if (!strncmp(dev->name, "plip", 4))
57 return 2500;
58
59 return 100; /* assume old 10Mbps */
60}
61
Stephen Hemminger4433f422005-12-20 15:19:51 -080062
Stephen Hemminger944c7942010-08-24 13:08:10 +000063/* Check for port carrier transistions. */
Stephen Hemminger269def72007-02-22 01:10:18 -080064void br_port_carrier_check(struct net_bridge_port *p)
Stephen Hemminger4433f422005-12-20 15:19:51 -080065{
Stephen Hemminger269def72007-02-22 01:10:18 -080066 struct net_device *dev = p->dev;
67 struct net_bridge *br = p->br;
Stephen Hemmingerb3f1be42006-02-09 17:08:52 -080068
stephen hemmingeraa7c6e52010-08-24 13:12:56 +000069 if (netif_running(dev) && netif_carrier_ok(dev))
Stephen Hemminger6e86b892006-03-03 17:14:51 -080070 p->path_cost = port_cost(dev);
Stephen Hemminger4433f422005-12-20 15:19:51 -080071
stephen hemmingeraa7c6e52010-08-24 13:12:56 +000072 if (!netif_running(br->dev))
73 return;
74
75 spin_lock_bh(&br->lock);
76 if (netif_running(dev) && netif_carrier_ok(dev)) {
77 if (p->state == BR_STATE_DISABLED)
78 br_stp_enable_port(p);
79 } else {
80 if (p->state != BR_STATE_DISABLED)
81 br_stp_disable_port(p);
Stephen Hemminger4433f422005-12-20 15:19:51 -080082 }
stephen hemmingeraa7c6e52010-08-24 13:12:56 +000083 spin_unlock_bh(&br->lock);
Stephen Hemminger4433f422005-12-20 15:19:51 -080084}
85
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -080086static void release_nbp(struct kobject *kobj)
87{
88 struct net_bridge_port *p
89 = container_of(kobj, struct net_bridge_port, kobj);
90 kfree(p);
91}
92
93static struct kobj_type brport_ktype = {
94#ifdef CONFIG_SYSFS
95 .sysfs_ops = &brport_sysfs_ops,
96#endif
97 .release = release_nbp,
98};
99
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100static void destroy_nbp(struct net_bridge_port *p)
101{
102 struct net_device *dev = p->dev;
103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 p->br = NULL;
105 p->dev = NULL;
106 dev_put(dev);
107
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800108 kobject_put(&p->kobj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109}
110
111static void destroy_nbp_rcu(struct rcu_head *head)
112{
113 struct net_bridge_port *p =
114 container_of(head, struct net_bridge_port, rcu);
115 destroy_nbp(p);
116}
117
Stephen Hemminger3f4cfc22006-01-31 17:44:07 -0800118/* Delete port(interface) from bridge is done in two steps.
119 * via RCU. First step, marks device as down. That deletes
120 * all the timers and stops new packets from flowing through.
121 *
122 * Final cleanup doesn't occur until after all CPU's finished
123 * processing packets.
124 *
125 * Protected from multiple admin operations by RTNL mutex
126 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127static void del_nbp(struct net_bridge_port *p)
128{
129 struct net_bridge *br = p->br;
130 struct net_device *dev = p->dev;
131
Randy Dunlapb3bcb722010-05-18 12:26:27 -0700132 sysfs_remove_link(br->ifobj, p->dev->name);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800133
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 dev_set_promiscuity(dev, -1);
135
136 spin_lock_bh(&br->lock);
137 br_stp_disable_port(p);
138 spin_unlock_bh(&br->lock);
139
Stephen Hemmingerb86c4502007-03-22 14:08:46 -0700140 br_ifinfo_notify(RTM_DELLINK, p);
141
Stephen Hemminger1a620692006-10-12 14:45:38 -0700142 br_fdb_delete_by_port(br, p, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
144 list_del_rcu(&p->list);
145
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000146 dev->priv_flags &= ~IFF_BRIDGE_PORT;
147
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000148 netdev_rx_handler_unregister(dev);
Eric Dumazet6df427f2011-05-19 19:37:40 +0000149 synchronize_net();
Stephen Hemmingerb3f1be42006-02-09 17:08:52 -0800150
Jiri Pirkoafc61512011-02-13 09:33:42 +0000151 netdev_set_master(dev, NULL);
152
Herbert Xu3fe2d7c2010-02-28 00:49:38 -0800153 br_multicast_del_port(p);
154
Stephen Hemminger125a12c2006-03-03 17:16:15 -0800155 kobject_uevent(&p->kobj, KOBJ_REMOVE);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800156 kobject_del(&p->kobj);
157
Herbert Xu91d2c342010-06-10 16:12:50 +0000158 br_netpoll_disable(p);
159
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 call_rcu(&p->rcu, destroy_nbp_rcu);
161}
162
stephen hemminger1ce5cce2011-10-06 11:19:41 +0000163/* Delete bridge device */
164void br_dev_delete(struct net_device *dev, struct list_head *head)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165{
stephen hemminger1ce5cce2011-10-06 11:19:41 +0000166 struct net_bridge *br = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 struct net_bridge_port *p, *n;
168
169 list_for_each_entry_safe(p, n, &br->port_list, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 del_nbp(p);
171 }
172
173 del_timer_sync(&br->gc_timer);
174
175 br_sysfs_delbr(br->dev);
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000176 unregister_netdevice_queue(br->dev, head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177}
178
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179/* find an available port number */
180static int find_portno(struct net_bridge *br)
181{
182 int index;
183 struct net_bridge_port *p;
184 unsigned long *inuse;
185
Stephen Hemminger3b781fa2006-03-20 22:56:50 -0800186 inuse = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 GFP_KERNEL);
188 if (!inuse)
189 return -ENOMEM;
190
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 set_bit(0, inuse); /* zero is reserved */
192 list_for_each_entry(p, &br->port_list, list) {
193 set_bit(p->port_no, inuse);
194 }
195 index = find_first_zero_bit(inuse, BR_MAX_PORTS);
196 kfree(inuse);
197
198 return (index >= BR_MAX_PORTS) ? -EXFULL : index;
199}
200
Stephen Hemminger4433f422005-12-20 15:19:51 -0800201/* called with RTNL but without bridge lock */
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900202static struct net_bridge_port *new_nbp(struct net_bridge *br,
Stephen Hemminger4433f422005-12-20 15:19:51 -0800203 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204{
205 int index;
206 struct net_bridge_port *p;
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900207
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 index = find_portno(br);
209 if (index < 0)
210 return ERR_PTR(index);
211
Stephen Hemmingercee48542006-03-20 22:57:03 -0800212 p = kzalloc(sizeof(*p), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 if (p == NULL)
214 return ERR_PTR(-ENOMEM);
215
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 p->br = br;
217 dev_hold(dev);
218 p->dev = dev;
Stephen Hemminger4433f422005-12-20 15:19:51 -0800219 p->path_cost = port_cost(dev);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900220 p->priority = 0x8000 >> BR_PORT_BITS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 p->port_no = index;
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000222 p->flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 br_init_port(p);
224 p->state = BR_STATE_DISABLED;
Stephen Hemmingerd32439c2006-03-03 17:15:34 -0800225 br_stp_port_timer_init(p);
Herbert Xu3fe2d7c2010-02-28 00:49:38 -0800226 br_multicast_add_port(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
228 return p;
229}
230
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700231int br_add_bridge(struct net *net, const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232{
233 struct net_device *dev;
Eric Dumazet11f3a6b2011-08-22 06:05:59 +0000234 int res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
stephen hemmingerbb900b22011-04-04 14:03:32 +0000236 dev = alloc_netdev(sizeof(struct net_bridge), name,
237 br_dev_setup);
238
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900239 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 return -ENOMEM;
241
stephen hemmingerbb900b22011-04-04 14:03:32 +0000242 dev_net_set(dev, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
Eric Dumazet11f3a6b2011-08-22 06:05:59 +0000244 res = register_netdev(dev);
245 if (res)
246 free_netdev(dev);
247 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248}
249
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700250int br_del_bridge(struct net *net, const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251{
252 struct net_device *dev;
253 int ret = 0;
254
255 rtnl_lock();
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700256 dev = __dev_get_by_name(net, name);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900257 if (dev == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 ret = -ENXIO; /* Could not find device */
259
260 else if (!(dev->priv_flags & IFF_EBRIDGE)) {
261 /* Attempt to delete non bridge device! */
262 ret = -EPERM;
263 }
264
265 else if (dev->flags & IFF_UP) {
266 /* Not shutdown yet. */
267 ret = -EBUSY;
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900268 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900270 else
stephen hemminger1ce5cce2011-10-06 11:19:41 +0000271 br_dev_delete(dev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
273 rtnl_unlock();
274 return ret;
275}
276
Kris Katterjohn46f25df2006-01-05 16:35:42 -0800277/* MTU of the bridge pseudo-device: ETH_DATA_LEN or the minimum of the ports */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278int br_min_mtu(const struct net_bridge *br)
279{
280 const struct net_bridge_port *p;
281 int mtu = 0;
282
283 ASSERT_RTNL();
284
285 if (list_empty(&br->port_list))
Kris Katterjohn46f25df2006-01-05 16:35:42 -0800286 mtu = ETH_DATA_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 else {
288 list_for_each_entry(p, &br->port_list, list) {
289 if (!mtu || p->dev->mtu < mtu)
290 mtu = p->dev->mtu;
291 }
292 }
293 return mtu;
294}
295
Stephen Hemminger81d35302005-05-29 14:15:17 -0700296/*
297 * Recomputes features using slave's features
298 */
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000299netdev_features_t br_features_recompute(struct net_bridge *br,
300 netdev_features_t features)
Stephen Hemminger81d35302005-05-29 14:15:17 -0700301{
302 struct net_bridge_port *p;
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000303 netdev_features_t mask;
Stephen Hemminger81d35302005-05-29 14:15:17 -0700304
Herbert Xub63365a2008-10-23 01:11:29 -0700305 if (list_empty(&br->port_list))
Michał Mirosławc4d27ef2011-04-22 06:31:16 +0000306 return features;
Herbert Xub63365a2008-10-23 01:11:29 -0700307
Michał Mirosławc4d27ef2011-04-22 06:31:16 +0000308 mask = features;
Herbert Xub63365a2008-10-23 01:11:29 -0700309 features &= ~NETIF_F_ONE_FOR_ALL;
Stephen Hemminger81d35302005-05-29 14:15:17 -0700310
311 list_for_each_entry(p, &br->port_list, list) {
Herbert Xub63365a2008-10-23 01:11:29 -0700312 features = netdev_increment_features(features,
313 p->dev->features, mask);
Stephen Hemminger81d35302005-05-29 14:15:17 -0700314 }
315
Michał Mirosławc4d27ef2011-04-22 06:31:16 +0000316 return features;
Stephen Hemminger81d35302005-05-29 14:15:17 -0700317}
318
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319/* called with RTNL */
320int br_add_if(struct net_bridge *br, struct net_device *dev)
321{
322 struct net_bridge_port *p;
323 int err = 0;
stephen hemmingeredf947f2011-03-24 13:24:01 +0000324 bool changed_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
Stephen Hemminger1056bd52009-11-05 20:46:52 -0800326 /* Don't allow bridging non-ethernet like devices */
327 if ((dev->flags & IFF_LOOPBACK) ||
stephen hemminger77f98592011-09-30 14:37:26 +0000328 dev->type != ARPHRD_ETHER || dev->addr_len != ETH_ALEN ||
329 !is_valid_ether_addr(dev->dev_addr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 return -EINVAL;
331
Stephen Hemminger1056bd52009-11-05 20:46:52 -0800332 /* No bridging of bridges */
Stephen Hemminger00829822008-11-20 20:14:53 -0800333 if (dev->netdev_ops->ndo_start_xmit == br_dev_xmit)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 return -ELOOP;
335
Stephen Hemminger1056bd52009-11-05 20:46:52 -0800336 /* Device is already being bridged */
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000337 if (br_port_exists(dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 return -EBUSY;
339
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100340 /* No bridging devices that dislike that (e.g. wireless) */
341 if (dev->priv_flags & IFF_DONT_BRIDGE)
342 return -EOPNOTSUPP;
343
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800344 p = new_nbp(br, dev);
345 if (IS_ERR(p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 return PTR_ERR(p);
347
Amerigo Wangbb8ed632011-05-19 21:39:11 +0000348 call_netdevice_notifiers(NETDEV_JOIN, dev);
349
Wang Chenbc3f9072008-07-14 20:53:13 -0700350 err = dev_set_promiscuity(dev, 1);
351 if (err)
352 goto put_back;
353
Greg Kroah-Hartmane32cc732007-12-17 23:05:35 -0700354 err = kobject_init_and_add(&p->kobj, &brport_ktype, &(dev->dev.kobj),
355 SYSFS_BRIDGE_PORT_ATTR);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800356 if (err)
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800357 goto err1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800359 err = br_sysfs_addif(p);
360 if (err)
361 goto err2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
Herbert Xu91d2c342010-06-10 16:12:50 +0000363 if (br_netpoll_info(br) && ((err = br_netpoll_enable(p))))
364 goto err3;
365
Jiri Pirkoafc61512011-02-13 09:33:42 +0000366 err = netdev_set_master(dev, br->dev);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000367 if (err)
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000368 goto err3;
369
Jiri Pirkoafc61512011-02-13 09:33:42 +0000370 err = netdev_rx_handler_register(dev, br_handle_frame, p);
371 if (err)
372 goto err4;
373
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000374 dev->priv_flags |= IFF_BRIDGE_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000375
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700376 dev_disable_lro(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800378 list_add_rcu(&p->list, &br->port_list);
379
Michał Mirosławc4d27ef2011-04-22 06:31:16 +0000380 netdev_update_features(br->dev);
381
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800382 spin_lock_bh(&br->lock);
stephen hemmingeredf947f2011-03-24 13:24:01 +0000383 changed_addr = br_stp_recalculate_bridge_id(br);
Aji Srinivasde790592007-03-07 16:10:53 -0800384
385 if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) &&
386 (br->dev->flags & IFF_UP))
387 br_stp_enable_port(p);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800388 spin_unlock_bh(&br->lock);
389
Stephen Hemmingerb86c4502007-03-22 14:08:46 -0700390 br_ifinfo_notify(RTM_NEWLINK, p);
391
stephen hemmingeredf947f2011-03-24 13:24:01 +0000392 if (changed_addr)
stephen hemminger56139fc2011-07-22 07:47:08 +0000393 call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
stephen hemmingeredf947f2011-03-24 13:24:01 +0000394
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800395 dev_set_mtu(br->dev, br_min_mtu(br));
Stephen Hemminger269def72007-02-22 01:10:18 -0800396
stephen hemminger77f98592011-09-30 14:37:26 +0000397 if (br_fdb_insert(br, p, dev->dev_addr))
398 netdev_err(dev, "failed insert local address bridge forwarding table\n");
399
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800400 kobject_uevent(&p->kobj, KOBJ_ADD);
401
402 return 0;
Jiri Pirkoafc61512011-02-13 09:33:42 +0000403
404err4:
405 netdev_set_master(dev, NULL);
Herbert Xu91d2c342010-06-10 16:12:50 +0000406err3:
407 sysfs_remove_link(br->ifobj, p->dev->name);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800408err2:
Xiaotian Fengc587aea2009-07-23 23:06:32 +0000409 kobject_put(&p->kobj);
Jeff Hansen30df94f2009-09-28 12:54:25 -0700410 p = NULL; /* kobject_put frees */
stephen hemminger77f98592011-09-30 14:37:26 +0000411err1:
Wang Chenbc3f9072008-07-14 20:53:13 -0700412 dev_set_promiscuity(dev, -1);
Volodymyr G Lukiianyk43af8532008-04-29 03:17:42 -0700413put_back:
414 dev_put(dev);
Wang Chenbc3f9072008-07-14 20:53:13 -0700415 kfree(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 return err;
417}
418
419/* called with RTNL */
420int br_del_if(struct net_bridge *br, struct net_device *dev)
421{
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000422 struct net_bridge_port *p;
Andrei Warkentin9be6dd62011-08-05 11:04:10 +0000423 bool changed_addr;
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900424
Eric Dumazetec1e5612010-11-15 06:38:14 +0000425 p = br_port_get_rtnl(dev);
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000426 if (!p || p->br != br)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 return -EINVAL;
428
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 del_nbp(p);
430
431 spin_lock_bh(&br->lock);
Andrei Warkentin9be6dd62011-08-05 11:04:10 +0000432 changed_addr = br_stp_recalculate_bridge_id(br);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 spin_unlock_bh(&br->lock);
434
Andrei Warkentin9be6dd62011-08-05 11:04:10 +0000435 if (changed_addr)
436 call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
437
Michał Mirosławc4d27ef2011-04-22 06:31:16 +0000438 netdev_update_features(br->dev);
439
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 return 0;
441}
442
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000443void __net_exit br_net_exit(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444{
Patrick McHardyab1b2042008-07-03 03:53:42 -0700445 struct net_device *dev;
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000446 LIST_HEAD(list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
448 rtnl_lock();
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000449 for_each_netdev(net, dev)
450 if (dev->priv_flags & IFF_EBRIDGE)
stephen hemminger1ce5cce2011-10-06 11:19:41 +0000451 br_dev_delete(dev, &list);
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000452
453 unregister_netdevice_many(&list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 rtnl_unlock();
455
456}