blob: 89ad25a76202924eadf9bce8aadf761dcea3e8d5 [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>
WANG Congc06ee962010-05-06 00:48:24 -070016#include <linux/netpoll.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/ethtool.h>
18#include <linux/if_arp.h>
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/rtnetlink.h>
Kris Katterjohn46f25df2006-01-05 16:35:42 -080022#include <linux/if_ether.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090023#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <net/sock.h>
25
26#include "br_private.h"
27
28/*
29 * Determine initial path cost based on speed.
30 * using recommendations from 802.1d standard
31 *
Matthew Wilcox61a44b92007-07-31 14:00:02 -070032 * Since driver might sleep need to not be holding any locks.
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 */
Stephen Hemminger4433f422005-12-20 15:19:51 -080034static int port_cost(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070035{
Stephen Hemmingerb4a488d2007-08-30 22:16:22 -070036 if (dev->ethtool_ops && dev->ethtool_ops->get_settings) {
37 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET, };
38
39 if (!dev->ethtool_ops->get_settings(dev, &ecmd)) {
Matthew Wilcox61a44b92007-07-31 14:00:02 -070040 switch(ecmd.speed) {
Matthew Wilcox61a44b92007-07-31 14:00:02 -070041 case SPEED_10000:
42 return 2;
Stephen Hemmingerb4a488d2007-08-30 22:16:22 -070043 case SPEED_1000:
44 return 4;
45 case SPEED_100:
46 return 19;
Matthew Wilcox61a44b92007-07-31 14:00:02 -070047 case SPEED_10:
48 return 100;
49 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 }
51 }
52
53 /* Old silly heuristics based on name */
54 if (!strncmp(dev->name, "lec", 3))
55 return 7;
56
57 if (!strncmp(dev->name, "plip", 4))
58 return 2500;
59
60 return 100; /* assume old 10Mbps */
61}
62
Stephen Hemminger4433f422005-12-20 15:19:51 -080063
Stephen Hemminger944c7942010-08-24 13:08:10 +000064/* Check for port carrier transistions. */
Stephen Hemminger269def72007-02-22 01:10:18 -080065void br_port_carrier_check(struct net_bridge_port *p)
Stephen Hemminger4433f422005-12-20 15:19:51 -080066{
Stephen Hemminger269def72007-02-22 01:10:18 -080067 struct net_device *dev = p->dev;
68 struct net_bridge *br = p->br;
Stephen Hemmingerb3f1be42006-02-09 17:08:52 -080069
stephen hemmingeraa7c6e52010-08-24 13:12:56 +000070 if (netif_running(dev) && netif_carrier_ok(dev))
Stephen Hemminger6e86b892006-03-03 17:14:51 -080071 p->path_cost = port_cost(dev);
Stephen Hemminger4433f422005-12-20 15:19:51 -080072
stephen hemmingeraa7c6e52010-08-24 13:12:56 +000073 if (!netif_running(br->dev))
74 return;
75
76 spin_lock_bh(&br->lock);
77 if (netif_running(dev) && 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 hemmingeraa7c6e52010-08-24 13:12:56 +000084 spin_unlock_bh(&br->lock);
Stephen Hemminger4433f422005-12-20 15:19:51 -080085}
86
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -080087static void release_nbp(struct kobject *kobj)
88{
89 struct net_bridge_port *p
90 = container_of(kobj, struct net_bridge_port, kobj);
91 kfree(p);
92}
93
94static struct kobj_type brport_ktype = {
95#ifdef CONFIG_SYSFS
96 .sysfs_ops = &brport_sysfs_ops,
97#endif
98 .release = release_nbp,
99};
100
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101static void destroy_nbp(struct net_bridge_port *p)
102{
103 struct net_device *dev = p->dev;
104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 p->br = NULL;
106 p->dev = NULL;
107 dev_put(dev);
108
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800109 kobject_put(&p->kobj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110}
111
112static void destroy_nbp_rcu(struct rcu_head *head)
113{
114 struct net_bridge_port *p =
115 container_of(head, struct net_bridge_port, rcu);
116 destroy_nbp(p);
117}
118
Stephen Hemminger3f4cfc22006-01-31 17:44:07 -0800119/* Delete port(interface) from bridge is done in two steps.
120 * via RCU. First step, marks device as down. That deletes
121 * all the timers and stops new packets from flowing through.
122 *
123 * Final cleanup doesn't occur until after all CPU's finished
124 * processing packets.
125 *
126 * Protected from multiple admin operations by RTNL mutex
127 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128static void del_nbp(struct net_bridge_port *p)
129{
130 struct net_bridge *br = p->br;
131 struct net_device *dev = p->dev;
132
Randy Dunlapb3bcb722010-05-18 12:26:27 -0700133 sysfs_remove_link(br->ifobj, p->dev->name);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800134
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 dev_set_promiscuity(dev, -1);
136
137 spin_lock_bh(&br->lock);
138 br_stp_disable_port(p);
139 spin_unlock_bh(&br->lock);
140
Stephen Hemmingerb86c4502007-03-22 14:08:46 -0700141 br_ifinfo_notify(RTM_DELLINK, p);
142
Stephen Hemminger1a620692006-10-12 14:45:38 -0700143 br_fdb_delete_by_port(br, p, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
145 list_del_rcu(&p->list);
146
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000147 dev->priv_flags &= ~IFF_BRIDGE_PORT;
148
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000149 netdev_rx_handler_unregister(dev);
Stephen Hemmingerb3f1be42006-02-09 17:08:52 -0800150
Herbert Xu3fe2d7c2010-02-28 00:49:38 -0800151 br_multicast_del_port(p);
152
Stephen Hemminger125a12c2006-03-03 17:16:15 -0800153 kobject_uevent(&p->kobj, KOBJ_REMOVE);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800154 kobject_del(&p->kobj);
155
Herbert Xu91d2c342010-06-10 16:12:50 +0000156 br_netpoll_disable(p);
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 call_rcu(&p->rcu, destroy_nbp_rcu);
159}
160
161/* called with RTNL */
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000162static void del_br(struct net_bridge *br, struct list_head *head)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163{
164 struct net_bridge_port *p, *n;
165
166 list_for_each_entry_safe(p, n, &br->port_list, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 del_nbp(p);
168 }
169
170 del_timer_sync(&br->gc_timer);
171
172 br_sysfs_delbr(br->dev);
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000173 unregister_netdevice_queue(br->dev, head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174}
175
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700176static struct net_device *new_bridge_dev(struct net *net, const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177{
178 struct net_bridge *br;
179 struct net_device *dev;
180
181 dev = alloc_netdev(sizeof(struct net_bridge), name,
182 br_dev_setup);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 if (!dev)
185 return NULL;
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700186 dev_net_set(dev, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
188 br = netdev_priv(dev);
189 br->dev = dev;
190
stephen hemminger14bb4782010-03-02 13:32:09 +0000191 br->stats = alloc_percpu(struct br_cpu_netstats);
192 if (!br->stats) {
193 free_netdev(dev);
194 return NULL;
195 }
196
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 spin_lock_init(&br->lock);
198 INIT_LIST_HEAD(&br->port_list);
199 spin_lock_init(&br->hash_lock);
200
201 br->bridge_id.prio[0] = 0x80;
202 br->bridge_id.prio[1] = 0x00;
Stephen Hemmingercee48542006-03-20 22:57:03 -0800203
204 memcpy(br->group_addr, br_group_address, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
Stephen Hemmingeredb5e462005-12-21 19:00:58 -0800206 br->feature_mask = dev->features;
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700207 br->stp_enabled = BR_NO_STP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 br->designated_root = br->bridge_id;
209 br->root_path_cost = 0;
210 br->root_port = 0;
211 br->bridge_max_age = br->max_age = 20 * HZ;
212 br->bridge_hello_time = br->hello_time = 2 * HZ;
213 br->bridge_forward_delay = br->forward_delay = 15 * HZ;
214 br->topology_change = 0;
215 br->topology_change_detected = 0;
216 br->ageing_time = 300 * HZ;
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700217
218 br_netfilter_rtable_init(br);
219
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 br_stp_timer_init(br);
Herbert Xu3fe2d7c2010-02-28 00:49:38 -0800221 br_multicast_init(br);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
223 return dev;
224}
225
226/* find an available port number */
227static int find_portno(struct net_bridge *br)
228{
229 int index;
230 struct net_bridge_port *p;
231 unsigned long *inuse;
232
Stephen Hemminger3b781fa2006-03-20 22:56:50 -0800233 inuse = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 GFP_KERNEL);
235 if (!inuse)
236 return -ENOMEM;
237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 set_bit(0, inuse); /* zero is reserved */
239 list_for_each_entry(p, &br->port_list, list) {
240 set_bit(p->port_no, inuse);
241 }
242 index = find_first_zero_bit(inuse, BR_MAX_PORTS);
243 kfree(inuse);
244
245 return (index >= BR_MAX_PORTS) ? -EXFULL : index;
246}
247
Stephen Hemminger4433f422005-12-20 15:19:51 -0800248/* called with RTNL but without bridge lock */
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900249static struct net_bridge_port *new_nbp(struct net_bridge *br,
Stephen Hemminger4433f422005-12-20 15:19:51 -0800250 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251{
252 int index;
253 struct net_bridge_port *p;
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900254
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 index = find_portno(br);
256 if (index < 0)
257 return ERR_PTR(index);
258
Stephen Hemmingercee48542006-03-20 22:57:03 -0800259 p = kzalloc(sizeof(*p), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 if (p == NULL)
261 return ERR_PTR(-ENOMEM);
262
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 p->br = br;
264 dev_hold(dev);
265 p->dev = dev;
Stephen Hemminger4433f422005-12-20 15:19:51 -0800266 p->path_cost = port_cost(dev);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900267 p->priority = 0x8000 >> BR_PORT_BITS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 p->port_no = index;
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000269 p->flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 br_init_port(p);
271 p->state = BR_STATE_DISABLED;
Stephen Hemmingerd32439c2006-03-03 17:15:34 -0800272 br_stp_port_timer_init(p);
Herbert Xu3fe2d7c2010-02-28 00:49:38 -0800273 br_multicast_add_port(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
275 return p;
276}
277
Marcel Holtmann384912e2009-08-31 21:08:19 +0000278static struct device_type br_type = {
279 .name = "bridge",
280};
281
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700282int br_add_bridge(struct net *net, const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283{
284 struct net_device *dev;
285 int ret;
286
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700287 dev = new_bridge_dev(net, name);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900288 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 return -ENOMEM;
290
291 rtnl_lock();
292 if (strchr(dev->name, '%')) {
293 ret = dev_alloc_name(dev, dev->name);
Pavel Emelyanove340a902008-05-04 17:58:07 -0700294 if (ret < 0)
295 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 }
297
Marcel Holtmann384912e2009-08-31 21:08:19 +0000298 SET_NETDEV_DEVTYPE(dev, &br_type);
299
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 ret = register_netdevice(dev);
Pavel Emelyanove340a902008-05-04 17:58:07 -0700301 if (ret)
302 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 ret = br_sysfs_addbr(dev);
Stephen Hemmingerac052022006-05-10 13:21:53 -0700305 if (ret)
Jiri Benc36485702006-06-05 16:39:34 -0700306 unregister_netdevice(dev);
307 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 rtnl_unlock();
Stephen Hemmingerac052022006-05-10 13:21:53 -0700309 return ret;
Pavel Emelyanove340a902008-05-04 17:58:07 -0700310
311out_free:
312 free_netdev(dev);
313 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314}
315
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700316int br_del_bridge(struct net *net, const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317{
318 struct net_device *dev;
319 int ret = 0;
320
321 rtnl_lock();
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700322 dev = __dev_get_by_name(net, name);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900323 if (dev == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 ret = -ENXIO; /* Could not find device */
325
326 else if (!(dev->priv_flags & IFF_EBRIDGE)) {
327 /* Attempt to delete non bridge device! */
328 ret = -EPERM;
329 }
330
331 else if (dev->flags & IFF_UP) {
332 /* Not shutdown yet. */
333 ret = -EBUSY;
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900334 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900336 else
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000337 del_br(netdev_priv(dev), NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
339 rtnl_unlock();
340 return ret;
341}
342
Kris Katterjohn46f25df2006-01-05 16:35:42 -0800343/* MTU of the bridge pseudo-device: ETH_DATA_LEN or the minimum of the ports */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344int br_min_mtu(const struct net_bridge *br)
345{
346 const struct net_bridge_port *p;
347 int mtu = 0;
348
349 ASSERT_RTNL();
350
351 if (list_empty(&br->port_list))
Kris Katterjohn46f25df2006-01-05 16:35:42 -0800352 mtu = ETH_DATA_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 else {
354 list_for_each_entry(p, &br->port_list, list) {
355 if (!mtu || p->dev->mtu < mtu)
356 mtu = p->dev->mtu;
357 }
358 }
359 return mtu;
360}
361
Stephen Hemminger81d35302005-05-29 14:15:17 -0700362/*
363 * Recomputes features using slave's features
364 */
365void br_features_recompute(struct net_bridge *br)
366{
367 struct net_bridge_port *p;
Herbert Xub63365a2008-10-23 01:11:29 -0700368 unsigned long features, mask;
Stephen Hemminger81d35302005-05-29 14:15:17 -0700369
Herbert Xub63365a2008-10-23 01:11:29 -0700370 features = mask = br->feature_mask;
371 if (list_empty(&br->port_list))
372 goto done;
373
374 features &= ~NETIF_F_ONE_FOR_ALL;
Stephen Hemminger81d35302005-05-29 14:15:17 -0700375
376 list_for_each_entry(p, &br->port_list, list) {
Herbert Xub63365a2008-10-23 01:11:29 -0700377 features = netdev_increment_features(features,
378 p->dev->features, mask);
Stephen Hemminger81d35302005-05-29 14:15:17 -0700379 }
380
Herbert Xub63365a2008-10-23 01:11:29 -0700381done:
382 br->dev->features = netdev_fix_features(features, NULL);
Stephen Hemminger81d35302005-05-29 14:15:17 -0700383}
384
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385/* called with RTNL */
386int br_add_if(struct net_bridge *br, struct net_device *dev)
387{
388 struct net_bridge_port *p;
389 int err = 0;
390
Stephen Hemminger1056bd52009-11-05 20:46:52 -0800391 /* Don't allow bridging non-ethernet like devices */
392 if ((dev->flags & IFF_LOOPBACK) ||
393 dev->type != ARPHRD_ETHER || dev->addr_len != ETH_ALEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 return -EINVAL;
395
Stephen Hemminger1056bd52009-11-05 20:46:52 -0800396 /* No bridging of bridges */
Stephen Hemminger00829822008-11-20 20:14:53 -0800397 if (dev->netdev_ops->ndo_start_xmit == br_dev_xmit)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 return -ELOOP;
399
Stephen Hemminger1056bd52009-11-05 20:46:52 -0800400 /* Device is already being bridged */
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000401 if (br_port_exists(dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 return -EBUSY;
403
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100404 /* No bridging devices that dislike that (e.g. wireless) */
405 if (dev->priv_flags & IFF_DONT_BRIDGE)
406 return -EOPNOTSUPP;
407
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800408 p = new_nbp(br, dev);
409 if (IS_ERR(p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 return PTR_ERR(p);
411
Wang Chenbc3f9072008-07-14 20:53:13 -0700412 err = dev_set_promiscuity(dev, 1);
413 if (err)
414 goto put_back;
415
Greg Kroah-Hartmane32cc732007-12-17 23:05:35 -0700416 err = kobject_init_and_add(&p->kobj, &brport_ktype, &(dev->dev.kobj),
417 SYSFS_BRIDGE_PORT_ATTR);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800418 if (err)
419 goto err0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900421 err = br_fdb_insert(br, p, dev->dev_addr);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800422 if (err)
423 goto err1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800425 err = br_sysfs_addif(p);
426 if (err)
427 goto err2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
Herbert Xu91d2c342010-06-10 16:12:50 +0000429 if (br_netpoll_info(br) && ((err = br_netpoll_enable(p))))
430 goto err3;
431
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000432 err = netdev_rx_handler_register(dev, br_handle_frame, p);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000433 if (err)
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000434 goto err3;
435
436 dev->priv_flags |= IFF_BRIDGE_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000437
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700438 dev_disable_lro(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800440 list_add_rcu(&p->list, &br->port_list);
441
442 spin_lock_bh(&br->lock);
443 br_stp_recalculate_bridge_id(br);
444 br_features_recompute(br);
Aji Srinivasde790592007-03-07 16:10:53 -0800445
446 if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) &&
447 (br->dev->flags & IFF_UP))
448 br_stp_enable_port(p);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800449 spin_unlock_bh(&br->lock);
450
Stephen Hemmingerb86c4502007-03-22 14:08:46 -0700451 br_ifinfo_notify(RTM_NEWLINK, p);
452
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800453 dev_set_mtu(br->dev, br_min_mtu(br));
Stephen Hemminger269def72007-02-22 01:10:18 -0800454
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800455 kobject_uevent(&p->kobj, KOBJ_ADD);
456
457 return 0;
Herbert Xu91d2c342010-06-10 16:12:50 +0000458err3:
459 sysfs_remove_link(br->ifobj, p->dev->name);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800460err2:
Stephen Hemminger1a620692006-10-12 14:45:38 -0700461 br_fdb_delete_by_port(br, p, 1);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800462err1:
Xiaotian Fengc587aea2009-07-23 23:06:32 +0000463 kobject_put(&p->kobj);
Jeff Hansen30df94f2009-09-28 12:54:25 -0700464 p = NULL; /* kobject_put frees */
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800465err0:
Wang Chenbc3f9072008-07-14 20:53:13 -0700466 dev_set_promiscuity(dev, -1);
Volodymyr G Lukiianyk43af8532008-04-29 03:17:42 -0700467put_back:
468 dev_put(dev);
Wang Chenbc3f9072008-07-14 20:53:13 -0700469 kfree(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 return err;
471}
472
473/* called with RTNL */
474int br_del_if(struct net_bridge *br, struct net_device *dev)
475{
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000476 struct net_bridge_port *p;
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900477
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000478 if (!br_port_exists(dev))
479 return -EINVAL;
480
481 p = br_port_get(dev);
482 if (p->br != br)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 return -EINVAL;
484
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 del_nbp(p);
486
487 spin_lock_bh(&br->lock);
488 br_stp_recalculate_bridge_id(br);
Stephen Hemminger81d35302005-05-29 14:15:17 -0700489 br_features_recompute(br);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 spin_unlock_bh(&br->lock);
491
492 return 0;
493}
494
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000495void __net_exit br_net_exit(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496{
Patrick McHardyab1b2042008-07-03 03:53:42 -0700497 struct net_device *dev;
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000498 LIST_HEAD(list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499
500 rtnl_lock();
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000501 for_each_netdev(net, dev)
502 if (dev->priv_flags & IFF_EBRIDGE)
503 del_br(netdev_priv(dev), &list);
504
505 unregister_netdevice_many(&list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 rtnl_unlock();
507
508}