blob: 718b60366dfe59303e11699c42903462dd21abf5 [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
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
163/* called with RTNL */
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000164static void del_br(struct net_bridge *br, struct list_head *head)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165{
166 struct net_bridge_port *p, *n;
167
168 list_for_each_entry_safe(p, n, &br->port_list, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 del_nbp(p);
170 }
171
172 del_timer_sync(&br->gc_timer);
173
174 br_sysfs_delbr(br->dev);
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000175 unregister_netdevice_queue(br->dev, head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176}
177
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700178static struct net_device *new_bridge_dev(struct net *net, const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179{
180 struct net_bridge *br;
181 struct net_device *dev;
182
183 dev = alloc_netdev(sizeof(struct net_bridge), name,
184 br_dev_setup);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900185
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 if (!dev)
187 return NULL;
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700188 dev_net_set(dev, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
190 br = netdev_priv(dev);
191 br->dev = dev;
192
stephen hemminger14bb4782010-03-02 13:32:09 +0000193 br->stats = alloc_percpu(struct br_cpu_netstats);
194 if (!br->stats) {
195 free_netdev(dev);
196 return NULL;
197 }
198
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 spin_lock_init(&br->lock);
200 INIT_LIST_HEAD(&br->port_list);
201 spin_lock_init(&br->hash_lock);
202
203 br->bridge_id.prio[0] = 0x80;
204 br->bridge_id.prio[1] = 0x00;
Stephen Hemmingercee48542006-03-20 22:57:03 -0800205
206 memcpy(br->group_addr, br_group_address, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207
Stephen Hemmingeredb5e462005-12-21 19:00:58 -0800208 br->feature_mask = dev->features;
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700209 br->stp_enabled = BR_NO_STP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 br->designated_root = br->bridge_id;
211 br->root_path_cost = 0;
212 br->root_port = 0;
213 br->bridge_max_age = br->max_age = 20 * HZ;
214 br->bridge_hello_time = br->hello_time = 2 * HZ;
215 br->bridge_forward_delay = br->forward_delay = 15 * HZ;
216 br->topology_change = 0;
217 br->topology_change_detected = 0;
218 br->ageing_time = 300 * HZ;
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700219
220 br_netfilter_rtable_init(br);
221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 br_stp_timer_init(br);
Herbert Xu3fe2d7c2010-02-28 00:49:38 -0800223 br_multicast_init(br);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
225 return dev;
226}
227
228/* find an available port number */
229static int find_portno(struct net_bridge *br)
230{
231 int index;
232 struct net_bridge_port *p;
233 unsigned long *inuse;
234
Stephen Hemminger3b781fa2006-03-20 22:56:50 -0800235 inuse = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 GFP_KERNEL);
237 if (!inuse)
238 return -ENOMEM;
239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 set_bit(0, inuse); /* zero is reserved */
241 list_for_each_entry(p, &br->port_list, list) {
242 set_bit(p->port_no, inuse);
243 }
244 index = find_first_zero_bit(inuse, BR_MAX_PORTS);
245 kfree(inuse);
246
247 return (index >= BR_MAX_PORTS) ? -EXFULL : index;
248}
249
Stephen Hemminger4433f422005-12-20 15:19:51 -0800250/* called with RTNL but without bridge lock */
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900251static struct net_bridge_port *new_nbp(struct net_bridge *br,
Stephen Hemminger4433f422005-12-20 15:19:51 -0800252 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253{
254 int index;
255 struct net_bridge_port *p;
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 index = find_portno(br);
258 if (index < 0)
259 return ERR_PTR(index);
260
Stephen Hemmingercee48542006-03-20 22:57:03 -0800261 p = kzalloc(sizeof(*p), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 if (p == NULL)
263 return ERR_PTR(-ENOMEM);
264
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 p->br = br;
266 dev_hold(dev);
267 p->dev = dev;
Stephen Hemminger4433f422005-12-20 15:19:51 -0800268 p->path_cost = port_cost(dev);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900269 p->priority = 0x8000 >> BR_PORT_BITS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 p->port_no = index;
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000271 p->flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 br_init_port(p);
273 p->state = BR_STATE_DISABLED;
Stephen Hemmingerd32439c2006-03-03 17:15:34 -0800274 br_stp_port_timer_init(p);
Herbert Xu3fe2d7c2010-02-28 00:49:38 -0800275 br_multicast_add_port(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
277 return p;
278}
279
Marcel Holtmann384912e2009-08-31 21:08:19 +0000280static struct device_type br_type = {
281 .name = "bridge",
282};
283
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700284int br_add_bridge(struct net *net, const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285{
286 struct net_device *dev;
287 int ret;
288
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700289 dev = new_bridge_dev(net, name);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900290 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 return -ENOMEM;
292
293 rtnl_lock();
294 if (strchr(dev->name, '%')) {
295 ret = dev_alloc_name(dev, dev->name);
Pavel Emelyanove340a902008-05-04 17:58:07 -0700296 if (ret < 0)
297 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 }
299
Marcel Holtmann384912e2009-08-31 21:08:19 +0000300 SET_NETDEV_DEVTYPE(dev, &br_type);
301
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 ret = register_netdevice(dev);
Pavel Emelyanove340a902008-05-04 17:58:07 -0700303 if (ret)
304 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 ret = br_sysfs_addbr(dev);
Stephen Hemmingerac052022006-05-10 13:21:53 -0700307 if (ret)
Jiri Benc36485702006-06-05 16:39:34 -0700308 unregister_netdevice(dev);
309 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 rtnl_unlock();
Stephen Hemmingerac052022006-05-10 13:21:53 -0700311 return ret;
Pavel Emelyanove340a902008-05-04 17:58:07 -0700312
313out_free:
314 free_netdev(dev);
315 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316}
317
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700318int br_del_bridge(struct net *net, const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319{
320 struct net_device *dev;
321 int ret = 0;
322
323 rtnl_lock();
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700324 dev = __dev_get_by_name(net, name);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900325 if (dev == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 ret = -ENXIO; /* Could not find device */
327
328 else if (!(dev->priv_flags & IFF_EBRIDGE)) {
329 /* Attempt to delete non bridge device! */
330 ret = -EPERM;
331 }
332
333 else if (dev->flags & IFF_UP) {
334 /* Not shutdown yet. */
335 ret = -EBUSY;
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900336 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900338 else
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000339 del_br(netdev_priv(dev), NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
341 rtnl_unlock();
342 return ret;
343}
344
Kris Katterjohn46f25df2006-01-05 16:35:42 -0800345/* MTU of the bridge pseudo-device: ETH_DATA_LEN or the minimum of the ports */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346int br_min_mtu(const struct net_bridge *br)
347{
348 const struct net_bridge_port *p;
349 int mtu = 0;
350
351 ASSERT_RTNL();
352
353 if (list_empty(&br->port_list))
Kris Katterjohn46f25df2006-01-05 16:35:42 -0800354 mtu = ETH_DATA_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 else {
356 list_for_each_entry(p, &br->port_list, list) {
357 if (!mtu || p->dev->mtu < mtu)
358 mtu = p->dev->mtu;
359 }
360 }
361 return mtu;
362}
363
Stephen Hemminger81d35302005-05-29 14:15:17 -0700364/*
365 * Recomputes features using slave's features
366 */
367void br_features_recompute(struct net_bridge *br)
368{
369 struct net_bridge_port *p;
Michał Mirosław04ed3e72011-01-24 15:32:47 -0800370 u32 features, mask;
Stephen Hemminger81d35302005-05-29 14:15:17 -0700371
Herbert Xub63365a2008-10-23 01:11:29 -0700372 features = mask = br->feature_mask;
373 if (list_empty(&br->port_list))
374 goto done;
375
376 features &= ~NETIF_F_ONE_FOR_ALL;
Stephen Hemminger81d35302005-05-29 14:15:17 -0700377
378 list_for_each_entry(p, &br->port_list, list) {
Herbert Xub63365a2008-10-23 01:11:29 -0700379 features = netdev_increment_features(features,
380 p->dev->features, mask);
Stephen Hemminger81d35302005-05-29 14:15:17 -0700381 }
382
Herbert Xub63365a2008-10-23 01:11:29 -0700383done:
Michał Mirosławacd11302011-01-24 15:45:15 -0800384 br->dev->features = netdev_fix_features(br->dev, features);
Stephen Hemminger81d35302005-05-29 14:15:17 -0700385}
386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387/* called with RTNL */
388int br_add_if(struct net_bridge *br, struct net_device *dev)
389{
390 struct net_bridge_port *p;
391 int err = 0;
stephen hemmingeredf947f2011-03-24 13:24:01 +0000392 bool changed_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
Stephen Hemminger1056bd52009-11-05 20:46:52 -0800394 /* Don't allow bridging non-ethernet like devices */
395 if ((dev->flags & IFF_LOOPBACK) ||
396 dev->type != ARPHRD_ETHER || dev->addr_len != ETH_ALEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 return -EINVAL;
398
Stephen Hemminger1056bd52009-11-05 20:46:52 -0800399 /* No bridging of bridges */
Stephen Hemminger00829822008-11-20 20:14:53 -0800400 if (dev->netdev_ops->ndo_start_xmit == br_dev_xmit)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 return -ELOOP;
402
Stephen Hemminger1056bd52009-11-05 20:46:52 -0800403 /* Device is already being bridged */
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000404 if (br_port_exists(dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 return -EBUSY;
406
Johannes Bergad4bb6f2009-11-19 00:56:30 +0100407 /* No bridging devices that dislike that (e.g. wireless) */
408 if (dev->priv_flags & IFF_DONT_BRIDGE)
409 return -EOPNOTSUPP;
410
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800411 p = new_nbp(br, dev);
412 if (IS_ERR(p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 return PTR_ERR(p);
414
Wang Chenbc3f9072008-07-14 20:53:13 -0700415 err = dev_set_promiscuity(dev, 1);
416 if (err)
417 goto put_back;
418
Greg Kroah-Hartmane32cc732007-12-17 23:05:35 -0700419 err = kobject_init_and_add(&p->kobj, &brport_ktype, &(dev->dev.kobj),
420 SYSFS_BRIDGE_PORT_ATTR);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800421 if (err)
422 goto err0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900424 err = br_fdb_insert(br, p, dev->dev_addr);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800425 if (err)
426 goto err1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800428 err = br_sysfs_addif(p);
429 if (err)
430 goto err2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
Herbert Xu91d2c342010-06-10 16:12:50 +0000432 if (br_netpoll_info(br) && ((err = br_netpoll_enable(p))))
433 goto err3;
434
Jiri Pirkoafc61512011-02-13 09:33:42 +0000435 err = netdev_set_master(dev, br->dev);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000436 if (err)
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000437 goto err3;
438
Jiri Pirkoafc61512011-02-13 09:33:42 +0000439 err = netdev_rx_handler_register(dev, br_handle_frame, p);
440 if (err)
441 goto err4;
442
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000443 dev->priv_flags |= IFF_BRIDGE_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000444
Ben Hutchings0187bdf2008-06-19 16:15:47 -0700445 dev_disable_lro(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800447 list_add_rcu(&p->list, &br->port_list);
448
449 spin_lock_bh(&br->lock);
stephen hemmingeredf947f2011-03-24 13:24:01 +0000450 changed_addr = br_stp_recalculate_bridge_id(br);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800451 br_features_recompute(br);
Aji Srinivasde790592007-03-07 16:10:53 -0800452
453 if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) &&
454 (br->dev->flags & IFF_UP))
455 br_stp_enable_port(p);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800456 spin_unlock_bh(&br->lock);
457
Stephen Hemmingerb86c4502007-03-22 14:08:46 -0700458 br_ifinfo_notify(RTM_NEWLINK, p);
459
stephen hemmingeredf947f2011-03-24 13:24:01 +0000460 if (changed_addr)
461 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
462
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800463 dev_set_mtu(br->dev, br_min_mtu(br));
Stephen Hemminger269def72007-02-22 01:10:18 -0800464
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800465 kobject_uevent(&p->kobj, KOBJ_ADD);
466
467 return 0;
Jiri Pirkoafc61512011-02-13 09:33:42 +0000468
469err4:
470 netdev_set_master(dev, NULL);
Herbert Xu91d2c342010-06-10 16:12:50 +0000471err3:
472 sysfs_remove_link(br->ifobj, p->dev->name);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800473err2:
Stephen Hemminger1a620692006-10-12 14:45:38 -0700474 br_fdb_delete_by_port(br, p, 1);
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800475err1:
Xiaotian Fengc587aea2009-07-23 23:06:32 +0000476 kobject_put(&p->kobj);
Jeff Hansen30df94f2009-09-28 12:54:25 -0700477 p = NULL; /* kobject_put frees */
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800478err0:
Wang Chenbc3f9072008-07-14 20:53:13 -0700479 dev_set_promiscuity(dev, -1);
Volodymyr G Lukiianyk43af8532008-04-29 03:17:42 -0700480put_back:
481 dev_put(dev);
Wang Chenbc3f9072008-07-14 20:53:13 -0700482 kfree(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 return err;
484}
485
486/* called with RTNL */
487int br_del_if(struct net_bridge *br, struct net_device *dev)
488{
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000489 struct net_bridge_port *p;
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900490
Eric Dumazetec1e5612010-11-15 06:38:14 +0000491 p = br_port_get_rtnl(dev);
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000492 if (!p || p->br != br)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 return -EINVAL;
494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 del_nbp(p);
496
497 spin_lock_bh(&br->lock);
498 br_stp_recalculate_bridge_id(br);
Stephen Hemminger81d35302005-05-29 14:15:17 -0700499 br_features_recompute(br);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 spin_unlock_bh(&br->lock);
501
502 return 0;
503}
504
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000505void __net_exit br_net_exit(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506{
Patrick McHardyab1b2042008-07-03 03:53:42 -0700507 struct net_device *dev;
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000508 LIST_HEAD(list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
510 rtnl_lock();
Eric Dumazet8c56ba02009-10-28 05:35:35 +0000511 for_each_netdev(net, dev)
512 if (dev->priv_flags & IFF_EBRIDGE)
513 del_br(netdev_priv(dev), &list);
514
515 unregister_netdevice_many(&list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 rtnl_unlock();
517
518}