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1/*
2 * Device handling code
3 * Linux ethernet bridge
4 *
5 * Authors:
6 * Lennert Buytenhek <buytenh@gnu.org>
7 *
8 * 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/netpoll.h>
17#include <linux/etherdevice.h>
18#include <linux/ethtool.h>
19#include <linux/list.h>
20#include <linux/netfilter_bridge.h>
21
22#include <asm/uaccess.h>
23#include "br_private.h"
24
25#define COMMON_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | \
26 NETIF_F_GSO_MASK | NETIF_F_HW_CSUM)
27
28const struct nf_br_ops __rcu *nf_br_ops __read_mostly;
29EXPORT_SYMBOL_GPL(nf_br_ops);
30
31static struct lock_class_key bridge_netdev_addr_lock_key;
32
33/* net device transmit always called with BH disabled */
34netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
35{
36 struct net_bridge *br = netdev_priv(dev);
37 const unsigned char *dest = skb->data;
38 struct net_bridge_fdb_entry *dst;
39 struct net_bridge_mdb_entry *mdst;
40 struct pcpu_sw_netstats *brstats = this_cpu_ptr(br->stats);
41 const struct nf_br_ops *nf_ops;
42 u16 vid = 0;
43
44 rcu_read_lock();
45 nf_ops = rcu_dereference(nf_br_ops);
46 if (nf_ops && nf_ops->br_dev_xmit_hook(skb)) {
47 rcu_read_unlock();
48 return NETDEV_TX_OK;
49 }
50
51 u64_stats_update_begin(&brstats->syncp);
52 brstats->tx_packets++;
53 brstats->tx_bytes += skb->len;
54 u64_stats_update_end(&brstats->syncp);
55
56 BR_INPUT_SKB_CB(skb)->brdev = dev;
57
58 skb_reset_mac_header(skb);
59 skb_pull(skb, ETH_HLEN);
60
61 if (!br_allowed_ingress(br, br_vlan_group_rcu(br), skb, &vid))
62 goto out;
63
64 if (is_broadcast_ether_addr(dest))
65 br_flood_deliver(br, skb, false);
66 else if (is_multicast_ether_addr(dest)) {
67 if (unlikely(netpoll_tx_running(dev))) {
68 br_flood_deliver(br, skb, false);
69 goto out;
70 }
71 if (br_multicast_rcv(br, NULL, skb, vid)) {
72 kfree_skb(skb);
73 goto out;
74 }
75
76 mdst = br_mdb_get(br, skb, vid);
77 if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
78 br_multicast_querier_exists(br, eth_hdr(skb)))
79 br_multicast_deliver(mdst, skb);
80 else
81 br_flood_deliver(br, skb, false);
82 } else if ((dst = __br_fdb_get(br, dest, vid)) != NULL)
83 br_deliver(dst->dst, skb);
84 else
85 br_flood_deliver(br, skb, true);
86
87out:
88 rcu_read_unlock();
89 return NETDEV_TX_OK;
90}
91
92static void br_set_lockdep_class(struct net_device *dev)
93{
94 lockdep_set_class(&dev->addr_list_lock, &bridge_netdev_addr_lock_key);
95}
96
97static int br_dev_init(struct net_device *dev)
98{
99 struct net_bridge *br = netdev_priv(dev);
100 int err;
101
102 br->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
103 if (!br->stats)
104 return -ENOMEM;
105
106 err = br_vlan_init(br);
107 if (err)
108 free_percpu(br->stats);
109 br_set_lockdep_class(dev);
110
111 return err;
112}
113
114static int br_dev_open(struct net_device *dev)
115{
116 struct net_bridge *br = netdev_priv(dev);
117
118 netdev_update_features(dev);
119 netif_start_queue(dev);
120 br_stp_enable_bridge(br);
121 br_multicast_open(br);
122
123 return 0;
124}
125
126static void br_dev_set_multicast_list(struct net_device *dev)
127{
128}
129
130static void br_dev_change_rx_flags(struct net_device *dev, int change)
131{
132 if (change & IFF_PROMISC)
133 br_manage_promisc(netdev_priv(dev));
134}
135
136static int br_dev_stop(struct net_device *dev)
137{
138 struct net_bridge *br = netdev_priv(dev);
139
140 br_stp_disable_bridge(br);
141 br_multicast_stop(br);
142
143 netif_stop_queue(dev);
144
145 return 0;
146}
147
148static struct rtnl_link_stats64 *br_get_stats64(struct net_device *dev,
149 struct rtnl_link_stats64 *stats)
150{
151 struct net_bridge *br = netdev_priv(dev);
152 struct pcpu_sw_netstats tmp, sum = { 0 };
153 unsigned int cpu;
154
155 for_each_possible_cpu(cpu) {
156 unsigned int start;
157 const struct pcpu_sw_netstats *bstats
158 = per_cpu_ptr(br->stats, cpu);
159 do {
160 start = u64_stats_fetch_begin_irq(&bstats->syncp);
161 memcpy(&tmp, bstats, sizeof(tmp));
162 } while (u64_stats_fetch_retry_irq(&bstats->syncp, start));
163 sum.tx_bytes += tmp.tx_bytes;
164 sum.tx_packets += tmp.tx_packets;
165 sum.rx_bytes += tmp.rx_bytes;
166 sum.rx_packets += tmp.rx_packets;
167 }
168
169 stats->tx_bytes = sum.tx_bytes;
170 stats->tx_packets = sum.tx_packets;
171 stats->rx_bytes = sum.rx_bytes;
172 stats->rx_packets = sum.rx_packets;
173
174 return stats;
175}
176
177static int br_change_mtu(struct net_device *dev, int new_mtu)
178{
179 struct net_bridge *br = netdev_priv(dev);
180 if (new_mtu < 68 || new_mtu > br_min_mtu(br))
181 return -EINVAL;
182
183 dev->mtu = new_mtu;
184
185#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
186 /* remember the MTU in the rtable for PMTU */
187 dst_metric_set(&br->fake_rtable.dst, RTAX_MTU, new_mtu);
188#endif
189
190 return 0;
191}
192
193/* Allow setting mac address to any valid ethernet address. */
194static int br_set_mac_address(struct net_device *dev, void *p)
195{
196 struct net_bridge *br = netdev_priv(dev);
197 struct sockaddr *addr = p;
198
199 if (!is_valid_ether_addr(addr->sa_data))
200 return -EADDRNOTAVAIL;
201
202 spin_lock_bh(&br->lock);
203 if (!ether_addr_equal(dev->dev_addr, addr->sa_data)) {
204 /* Mac address will be changed in br_stp_change_bridge_id(). */
205 br_stp_change_bridge_id(br, addr->sa_data);
206 }
207 spin_unlock_bh(&br->lock);
208
209 return 0;
210}
211
212static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
213{
214 strlcpy(info->driver, "bridge", sizeof(info->driver));
215 strlcpy(info->version, BR_VERSION, sizeof(info->version));
216 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
217 strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
218}
219
220static netdev_features_t br_fix_features(struct net_device *dev,
221 netdev_features_t features)
222{
223 struct net_bridge *br = netdev_priv(dev);
224
225 return br_features_recompute(br, features);
226}
227
228#ifdef CONFIG_NET_POLL_CONTROLLER
229static void br_poll_controller(struct net_device *br_dev)
230{
231}
232
233static void br_netpoll_cleanup(struct net_device *dev)
234{
235 struct net_bridge *br = netdev_priv(dev);
236 struct net_bridge_port *p;
237
238 list_for_each_entry(p, &br->port_list, list)
239 br_netpoll_disable(p);
240}
241
242static int __br_netpoll_enable(struct net_bridge_port *p)
243{
244 struct netpoll *np;
245 int err;
246
247 np = kzalloc(sizeof(*p->np), GFP_KERNEL);
248 if (!np)
249 return -ENOMEM;
250
251 err = __netpoll_setup(np, p->dev);
252 if (err) {
253 kfree(np);
254 return err;
255 }
256
257 p->np = np;
258 return err;
259}
260
261int br_netpoll_enable(struct net_bridge_port *p)
262{
263 if (!p->br->dev->npinfo)
264 return 0;
265
266 return __br_netpoll_enable(p);
267}
268
269static int br_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
270{
271 struct net_bridge *br = netdev_priv(dev);
272 struct net_bridge_port *p;
273 int err = 0;
274
275 list_for_each_entry(p, &br->port_list, list) {
276 if (!p->dev)
277 continue;
278 err = __br_netpoll_enable(p);
279 if (err)
280 goto fail;
281 }
282
283out:
284 return err;
285
286fail:
287 br_netpoll_cleanup(dev);
288 goto out;
289}
290
291void br_netpoll_disable(struct net_bridge_port *p)
292{
293 struct netpoll *np = p->np;
294
295 if (!np)
296 return;
297
298 p->np = NULL;
299
300 __netpoll_free_async(np);
301}
302
303#endif
304
305static int br_add_slave(struct net_device *dev, struct net_device *slave_dev)
306
307{
308 struct net_bridge *br = netdev_priv(dev);
309
310 return br_add_if(br, slave_dev);
311}
312
313static int br_del_slave(struct net_device *dev, struct net_device *slave_dev)
314{
315 struct net_bridge *br = netdev_priv(dev);
316
317 return br_del_if(br, slave_dev);
318}
319
320static const struct ethtool_ops br_ethtool_ops = {
321 .get_drvinfo = br_getinfo,
322 .get_link = ethtool_op_get_link,
323};
324
325static const struct net_device_ops br_netdev_ops = {
326 .ndo_open = br_dev_open,
327 .ndo_stop = br_dev_stop,
328 .ndo_init = br_dev_init,
329 .ndo_start_xmit = br_dev_xmit,
330 .ndo_get_stats64 = br_get_stats64,
331 .ndo_set_mac_address = br_set_mac_address,
332 .ndo_set_rx_mode = br_dev_set_multicast_list,
333 .ndo_change_rx_flags = br_dev_change_rx_flags,
334 .ndo_change_mtu = br_change_mtu,
335 .ndo_do_ioctl = br_dev_ioctl,
336#ifdef CONFIG_NET_POLL_CONTROLLER
337 .ndo_netpoll_setup = br_netpoll_setup,
338 .ndo_netpoll_cleanup = br_netpoll_cleanup,
339 .ndo_poll_controller = br_poll_controller,
340#endif
341 .ndo_add_slave = br_add_slave,
342 .ndo_del_slave = br_del_slave,
343 .ndo_fix_features = br_fix_features,
344 .ndo_fdb_add = br_fdb_add,
345 .ndo_fdb_del = br_fdb_delete,
346 .ndo_fdb_dump = br_fdb_dump,
347 .ndo_bridge_getlink = br_getlink,
348 .ndo_bridge_setlink = br_setlink,
349 .ndo_bridge_dellink = br_dellink,
350 .ndo_features_check = passthru_features_check,
351};
352
353static void br_dev_free(struct net_device *dev)
354{
355 struct net_bridge *br = netdev_priv(dev);
356
357 free_percpu(br->stats);
358 free_netdev(dev);
359}
360
361static struct device_type br_type = {
362 .name = "bridge",
363};
364
365void br_dev_setup(struct net_device *dev)
366{
367 struct net_bridge *br = netdev_priv(dev);
368
369 eth_hw_addr_random(dev);
370 ether_setup(dev);
371
372 dev->netdev_ops = &br_netdev_ops;
373 dev->destructor = br_dev_free;
374 dev->ethtool_ops = &br_ethtool_ops;
375 SET_NETDEV_DEVTYPE(dev, &br_type);
376 dev->priv_flags = IFF_EBRIDGE | IFF_NO_QUEUE;
377
378 dev->features = COMMON_FEATURES | NETIF_F_LLTX | NETIF_F_NETNS_LOCAL |
379 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
380 dev->hw_features = COMMON_FEATURES | NETIF_F_HW_VLAN_CTAG_TX |
381 NETIF_F_HW_VLAN_STAG_TX;
382 dev->vlan_features = COMMON_FEATURES;
383
384 br->dev = dev;
385 spin_lock_init(&br->lock);
386 INIT_LIST_HEAD(&br->port_list);
387 spin_lock_init(&br->hash_lock);
388
389 br->bridge_id.prio[0] = 0x80;
390 br->bridge_id.prio[1] = 0x00;
391
392 ether_addr_copy(br->group_addr, eth_reserved_addr_base);
393
394 br->stp_enabled = BR_NO_STP;
395 br->group_fwd_mask = BR_GROUPFWD_DEFAULT;
396 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
397
398 br->designated_root = br->bridge_id;
399 br->bridge_max_age = br->max_age = 20 * HZ;
400 br->bridge_hello_time = br->hello_time = 2 * HZ;
401 br->bridge_forward_delay = br->forward_delay = 15 * HZ;
402 br->ageing_time = BR_DEFAULT_AGEING_TIME;
403
404 br_netfilter_rtable_init(br);
405 br_stp_timer_init(br);
406 br_multicast_init(br);
407}
1/*
2 * Device handling code
3 * Linux ethernet bridge
4 *
5 * Authors:
6 * Lennert Buytenhek <buytenh@gnu.org>
7 *
8 * 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/netpoll.h>
17#include <linux/etherdevice.h>
18#include <linux/ethtool.h>
19#include <linux/list.h>
20#include <linux/netfilter_bridge.h>
21
22#include <linux/uaccess.h>
23#include "br_private.h"
24
25#define COMMON_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | \
26 NETIF_F_GSO_MASK | NETIF_F_HW_CSUM)
27
28const struct nf_br_ops __rcu *nf_br_ops __read_mostly;
29EXPORT_SYMBOL_GPL(nf_br_ops);
30
31static struct lock_class_key bridge_netdev_addr_lock_key;
32
33/* net device transmit always called with BH disabled */
34netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
35{
36 struct net_bridge *br = netdev_priv(dev);
37 const unsigned char *dest = skb->data;
38 struct net_bridge_fdb_entry *dst;
39 struct net_bridge_mdb_entry *mdst;
40 struct pcpu_sw_netstats *brstats = this_cpu_ptr(br->stats);
41 const struct nf_br_ops *nf_ops;
42 u16 vid = 0;
43
44 rcu_read_lock();
45 nf_ops = rcu_dereference(nf_br_ops);
46 if (nf_ops && nf_ops->br_dev_xmit_hook(skb)) {
47 rcu_read_unlock();
48 return NETDEV_TX_OK;
49 }
50
51 u64_stats_update_begin(&brstats->syncp);
52 brstats->tx_packets++;
53 brstats->tx_bytes += skb->len;
54 u64_stats_update_end(&brstats->syncp);
55
56 BR_INPUT_SKB_CB(skb)->brdev = dev;
57
58 skb_reset_mac_header(skb);
59 skb_pull(skb, ETH_HLEN);
60
61 if (!br_allowed_ingress(br, br_vlan_group_rcu(br), skb, &vid))
62 goto out;
63
64 if (is_broadcast_ether_addr(dest)) {
65 br_flood(br, skb, BR_PKT_BROADCAST, false, true);
66 } else if (is_multicast_ether_addr(dest)) {
67 if (unlikely(netpoll_tx_running(dev))) {
68 br_flood(br, skb, BR_PKT_MULTICAST, false, true);
69 goto out;
70 }
71 if (br_multicast_rcv(br, NULL, skb, vid)) {
72 kfree_skb(skb);
73 goto out;
74 }
75
76 mdst = br_mdb_get(br, skb, vid);
77 if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
78 br_multicast_querier_exists(br, eth_hdr(skb)))
79 br_multicast_flood(mdst, skb, false, true);
80 else
81 br_flood(br, skb, BR_PKT_MULTICAST, false, true);
82 } else if ((dst = __br_fdb_get(br, dest, vid)) != NULL) {
83 br_forward(dst->dst, skb, false, true);
84 } else {
85 br_flood(br, skb, BR_PKT_UNICAST, false, true);
86 }
87out:
88 rcu_read_unlock();
89 return NETDEV_TX_OK;
90}
91
92static void br_set_lockdep_class(struct net_device *dev)
93{
94 lockdep_set_class(&dev->addr_list_lock, &bridge_netdev_addr_lock_key);
95}
96
97static int br_dev_init(struct net_device *dev)
98{
99 struct net_bridge *br = netdev_priv(dev);
100 int err;
101
102 br->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
103 if (!br->stats)
104 return -ENOMEM;
105
106 err = br_vlan_init(br);
107 if (err) {
108 free_percpu(br->stats);
109 return err;
110 }
111
112 err = br_multicast_init_stats(br);
113 if (err) {
114 free_percpu(br->stats);
115 br_vlan_flush(br);
116 }
117 br_set_lockdep_class(dev);
118
119 return err;
120}
121
122static int br_dev_open(struct net_device *dev)
123{
124 struct net_bridge *br = netdev_priv(dev);
125
126 netdev_update_features(dev);
127 netif_start_queue(dev);
128 br_stp_enable_bridge(br);
129 br_multicast_open(br);
130
131 return 0;
132}
133
134static void br_dev_set_multicast_list(struct net_device *dev)
135{
136}
137
138static void br_dev_change_rx_flags(struct net_device *dev, int change)
139{
140 if (change & IFF_PROMISC)
141 br_manage_promisc(netdev_priv(dev));
142}
143
144static int br_dev_stop(struct net_device *dev)
145{
146 struct net_bridge *br = netdev_priv(dev);
147
148 br_stp_disable_bridge(br);
149 br_multicast_stop(br);
150
151 netif_stop_queue(dev);
152
153 return 0;
154}
155
156static struct rtnl_link_stats64 *br_get_stats64(struct net_device *dev,
157 struct rtnl_link_stats64 *stats)
158{
159 struct net_bridge *br = netdev_priv(dev);
160 struct pcpu_sw_netstats tmp, sum = { 0 };
161 unsigned int cpu;
162
163 for_each_possible_cpu(cpu) {
164 unsigned int start;
165 const struct pcpu_sw_netstats *bstats
166 = per_cpu_ptr(br->stats, cpu);
167 do {
168 start = u64_stats_fetch_begin_irq(&bstats->syncp);
169 memcpy(&tmp, bstats, sizeof(tmp));
170 } while (u64_stats_fetch_retry_irq(&bstats->syncp, start));
171 sum.tx_bytes += tmp.tx_bytes;
172 sum.tx_packets += tmp.tx_packets;
173 sum.rx_bytes += tmp.rx_bytes;
174 sum.rx_packets += tmp.rx_packets;
175 }
176
177 stats->tx_bytes = sum.tx_bytes;
178 stats->tx_packets = sum.tx_packets;
179 stats->rx_bytes = sum.rx_bytes;
180 stats->rx_packets = sum.rx_packets;
181
182 return stats;
183}
184
185static int br_change_mtu(struct net_device *dev, int new_mtu)
186{
187 struct net_bridge *br = netdev_priv(dev);
188 if (new_mtu > br_min_mtu(br))
189 return -EINVAL;
190
191 dev->mtu = new_mtu;
192
193#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
194 /* remember the MTU in the rtable for PMTU */
195 dst_metric_set(&br->fake_rtable.dst, RTAX_MTU, new_mtu);
196#endif
197
198 return 0;
199}
200
201/* Allow setting mac address to any valid ethernet address. */
202static int br_set_mac_address(struct net_device *dev, void *p)
203{
204 struct net_bridge *br = netdev_priv(dev);
205 struct sockaddr *addr = p;
206
207 if (!is_valid_ether_addr(addr->sa_data))
208 return -EADDRNOTAVAIL;
209
210 spin_lock_bh(&br->lock);
211 if (!ether_addr_equal(dev->dev_addr, addr->sa_data)) {
212 /* Mac address will be changed in br_stp_change_bridge_id(). */
213 br_stp_change_bridge_id(br, addr->sa_data);
214 }
215 spin_unlock_bh(&br->lock);
216
217 return 0;
218}
219
220static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
221{
222 strlcpy(info->driver, "bridge", sizeof(info->driver));
223 strlcpy(info->version, BR_VERSION, sizeof(info->version));
224 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
225 strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
226}
227
228static netdev_features_t br_fix_features(struct net_device *dev,
229 netdev_features_t features)
230{
231 struct net_bridge *br = netdev_priv(dev);
232
233 return br_features_recompute(br, features);
234}
235
236#ifdef CONFIG_NET_POLL_CONTROLLER
237static void br_poll_controller(struct net_device *br_dev)
238{
239}
240
241static void br_netpoll_cleanup(struct net_device *dev)
242{
243 struct net_bridge *br = netdev_priv(dev);
244 struct net_bridge_port *p;
245
246 list_for_each_entry(p, &br->port_list, list)
247 br_netpoll_disable(p);
248}
249
250static int __br_netpoll_enable(struct net_bridge_port *p)
251{
252 struct netpoll *np;
253 int err;
254
255 np = kzalloc(sizeof(*p->np), GFP_KERNEL);
256 if (!np)
257 return -ENOMEM;
258
259 err = __netpoll_setup(np, p->dev);
260 if (err) {
261 kfree(np);
262 return err;
263 }
264
265 p->np = np;
266 return err;
267}
268
269int br_netpoll_enable(struct net_bridge_port *p)
270{
271 if (!p->br->dev->npinfo)
272 return 0;
273
274 return __br_netpoll_enable(p);
275}
276
277static int br_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
278{
279 struct net_bridge *br = netdev_priv(dev);
280 struct net_bridge_port *p;
281 int err = 0;
282
283 list_for_each_entry(p, &br->port_list, list) {
284 if (!p->dev)
285 continue;
286 err = __br_netpoll_enable(p);
287 if (err)
288 goto fail;
289 }
290
291out:
292 return err;
293
294fail:
295 br_netpoll_cleanup(dev);
296 goto out;
297}
298
299void br_netpoll_disable(struct net_bridge_port *p)
300{
301 struct netpoll *np = p->np;
302
303 if (!np)
304 return;
305
306 p->np = NULL;
307
308 __netpoll_free_async(np);
309}
310
311#endif
312
313static int br_add_slave(struct net_device *dev, struct net_device *slave_dev)
314
315{
316 struct net_bridge *br = netdev_priv(dev);
317
318 return br_add_if(br, slave_dev);
319}
320
321static int br_del_slave(struct net_device *dev, struct net_device *slave_dev)
322{
323 struct net_bridge *br = netdev_priv(dev);
324
325 return br_del_if(br, slave_dev);
326}
327
328static const struct ethtool_ops br_ethtool_ops = {
329 .get_drvinfo = br_getinfo,
330 .get_link = ethtool_op_get_link,
331};
332
333static const struct net_device_ops br_netdev_ops = {
334 .ndo_open = br_dev_open,
335 .ndo_stop = br_dev_stop,
336 .ndo_init = br_dev_init,
337 .ndo_start_xmit = br_dev_xmit,
338 .ndo_get_stats64 = br_get_stats64,
339 .ndo_set_mac_address = br_set_mac_address,
340 .ndo_set_rx_mode = br_dev_set_multicast_list,
341 .ndo_change_rx_flags = br_dev_change_rx_flags,
342 .ndo_change_mtu = br_change_mtu,
343 .ndo_do_ioctl = br_dev_ioctl,
344#ifdef CONFIG_NET_POLL_CONTROLLER
345 .ndo_netpoll_setup = br_netpoll_setup,
346 .ndo_netpoll_cleanup = br_netpoll_cleanup,
347 .ndo_poll_controller = br_poll_controller,
348#endif
349 .ndo_add_slave = br_add_slave,
350 .ndo_del_slave = br_del_slave,
351 .ndo_fix_features = br_fix_features,
352 .ndo_neigh_construct = netdev_default_l2upper_neigh_construct,
353 .ndo_neigh_destroy = netdev_default_l2upper_neigh_destroy,
354 .ndo_fdb_add = br_fdb_add,
355 .ndo_fdb_del = br_fdb_delete,
356 .ndo_fdb_dump = br_fdb_dump,
357 .ndo_bridge_getlink = br_getlink,
358 .ndo_bridge_setlink = br_setlink,
359 .ndo_bridge_dellink = br_dellink,
360 .ndo_features_check = passthru_features_check,
361};
362
363static void br_dev_free(struct net_device *dev)
364{
365 struct net_bridge *br = netdev_priv(dev);
366
367 free_percpu(br->stats);
368 free_netdev(dev);
369}
370
371static struct device_type br_type = {
372 .name = "bridge",
373};
374
375void br_dev_setup(struct net_device *dev)
376{
377 struct net_bridge *br = netdev_priv(dev);
378
379 eth_hw_addr_random(dev);
380 ether_setup(dev);
381
382 dev->netdev_ops = &br_netdev_ops;
383 dev->destructor = br_dev_free;
384 dev->ethtool_ops = &br_ethtool_ops;
385 SET_NETDEV_DEVTYPE(dev, &br_type);
386 dev->priv_flags = IFF_EBRIDGE | IFF_NO_QUEUE;
387
388 dev->features = COMMON_FEATURES | NETIF_F_LLTX | NETIF_F_NETNS_LOCAL |
389 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
390 dev->hw_features = COMMON_FEATURES | NETIF_F_HW_VLAN_CTAG_TX |
391 NETIF_F_HW_VLAN_STAG_TX;
392 dev->vlan_features = COMMON_FEATURES;
393
394 br->dev = dev;
395 spin_lock_init(&br->lock);
396 INIT_LIST_HEAD(&br->port_list);
397 spin_lock_init(&br->hash_lock);
398
399 br->bridge_id.prio[0] = 0x80;
400 br->bridge_id.prio[1] = 0x00;
401
402 ether_addr_copy(br->group_addr, eth_reserved_addr_base);
403
404 br->stp_enabled = BR_NO_STP;
405 br->group_fwd_mask = BR_GROUPFWD_DEFAULT;
406 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
407
408 br->designated_root = br->bridge_id;
409 br->bridge_max_age = br->max_age = 20 * HZ;
410 br->bridge_hello_time = br->hello_time = 2 * HZ;
411 br->bridge_forward_delay = br->forward_delay = 15 * HZ;
412 br->bridge_ageing_time = br->ageing_time = BR_DEFAULT_AGEING_TIME;
413 dev->max_mtu = ETH_MAX_MTU;
414
415 br_netfilter_rtable_init(br);
416 br_stp_timer_init(br);
417 br_multicast_init(br);
418}