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