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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Device handling code
4 * Linux ethernet bridge
5 *
6 * Authors:
7 * Lennert Buytenhek <buytenh@gnu.org>
8 */
9
10#include <linux/kernel.h>
11#include <linux/netdevice.h>
12#include <linux/netpoll.h>
13#include <linux/etherdevice.h>
14#include <linux/ethtool.h>
15#include <linux/list.h>
16#include <linux/netfilter_bridge.h>
17
18#include <linux/uaccess.h>
19#include "br_private.h"
20
21#define COMMON_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | \
22 NETIF_F_GSO_MASK | NETIF_F_HW_CSUM)
23
24const struct nf_br_ops __rcu *nf_br_ops __read_mostly;
25EXPORT_SYMBOL_GPL(nf_br_ops);
26
27/* net device transmit always called with BH disabled */
28netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
29{
30 struct net_bridge *br = netdev_priv(dev);
31 struct net_bridge_fdb_entry *dst;
32 struct net_bridge_mdb_entry *mdst;
33 struct pcpu_sw_netstats *brstats = this_cpu_ptr(br->stats);
34 const struct nf_br_ops *nf_ops;
35 const unsigned char *dest;
36 struct ethhdr *eth;
37 u16 vid = 0;
38
39 rcu_read_lock();
40 nf_ops = rcu_dereference(nf_br_ops);
41 if (nf_ops && nf_ops->br_dev_xmit_hook(skb)) {
42 rcu_read_unlock();
43 return NETDEV_TX_OK;
44 }
45
46 u64_stats_update_begin(&brstats->syncp);
47 brstats->tx_packets++;
48 brstats->tx_bytes += skb->len;
49 u64_stats_update_end(&brstats->syncp);
50
51 br_switchdev_frame_unmark(skb);
52 BR_INPUT_SKB_CB(skb)->brdev = dev;
53 BR_INPUT_SKB_CB(skb)->frag_max_size = 0;
54
55 skb_reset_mac_header(skb);
56 eth = eth_hdr(skb);
57 skb_pull(skb, ETH_HLEN);
58
59 if (!br_allowed_ingress(br, br_vlan_group_rcu(br), skb, &vid))
60 goto out;
61
62 if (IS_ENABLED(CONFIG_INET) &&
63 (eth->h_proto == htons(ETH_P_ARP) ||
64 eth->h_proto == htons(ETH_P_RARP)) &&
65 br_opt_get(br, BROPT_NEIGH_SUPPRESS_ENABLED)) {
66 br_do_proxy_suppress_arp(skb, br, vid, NULL);
67 } else if (IS_ENABLED(CONFIG_IPV6) &&
68 skb->protocol == htons(ETH_P_IPV6) &&
69 br_opt_get(br, BROPT_NEIGH_SUPPRESS_ENABLED) &&
70 pskb_may_pull(skb, sizeof(struct ipv6hdr) +
71 sizeof(struct nd_msg)) &&
72 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) {
73 struct nd_msg *msg, _msg;
74
75 msg = br_is_nd_neigh_msg(skb, &_msg);
76 if (msg)
77 br_do_suppress_nd(skb, br, vid, NULL, msg);
78 }
79
80 dest = eth_hdr(skb)->h_dest;
81 if (is_broadcast_ether_addr(dest)) {
82 br_flood(br, skb, BR_PKT_BROADCAST, false, true);
83 } else if (is_multicast_ether_addr(dest)) {
84 if (unlikely(netpoll_tx_running(dev))) {
85 br_flood(br, skb, BR_PKT_MULTICAST, false, true);
86 goto out;
87 }
88 if (br_multicast_rcv(br, NULL, skb, vid)) {
89 kfree_skb(skb);
90 goto out;
91 }
92
93 mdst = br_mdb_get(br, skb, vid);
94 if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
95 br_multicast_querier_exists(br, eth_hdr(skb)))
96 br_multicast_flood(mdst, skb, false, true);
97 else
98 br_flood(br, skb, BR_PKT_MULTICAST, false, true);
99 } else if ((dst = br_fdb_find_rcu(br, dest, vid)) != NULL) {
100 br_forward(dst->dst, skb, false, true);
101 } else {
102 br_flood(br, skb, BR_PKT_UNICAST, false, true);
103 }
104out:
105 rcu_read_unlock();
106 return NETDEV_TX_OK;
107}
108
109static int br_dev_init(struct net_device *dev)
110{
111 struct net_bridge *br = netdev_priv(dev);
112 int err;
113
114 br->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
115 if (!br->stats)
116 return -ENOMEM;
117
118 err = br_fdb_hash_init(br);
119 if (err) {
120 free_percpu(br->stats);
121 return err;
122 }
123
124 err = br_mdb_hash_init(br);
125 if (err) {
126 free_percpu(br->stats);
127 br_fdb_hash_fini(br);
128 return err;
129 }
130
131 err = br_vlan_init(br);
132 if (err) {
133 free_percpu(br->stats);
134 br_mdb_hash_fini(br);
135 br_fdb_hash_fini(br);
136 return err;
137 }
138
139 err = br_multicast_init_stats(br);
140 if (err) {
141 free_percpu(br->stats);
142 br_vlan_flush(br);
143 br_mdb_hash_fini(br);
144 br_fdb_hash_fini(br);
145 }
146
147 return err;
148}
149
150static void br_dev_uninit(struct net_device *dev)
151{
152 struct net_bridge *br = netdev_priv(dev);
153
154 br_multicast_dev_del(br);
155 br_multicast_uninit_stats(br);
156 br_vlan_flush(br);
157 br_mdb_hash_fini(br);
158 br_fdb_hash_fini(br);
159 free_percpu(br->stats);
160}
161
162static int br_dev_open(struct net_device *dev)
163{
164 struct net_bridge *br = netdev_priv(dev);
165
166 netdev_update_features(dev);
167 netif_start_queue(dev);
168 br_stp_enable_bridge(br);
169 br_multicast_open(br);
170
171 return 0;
172}
173
174static void br_dev_set_multicast_list(struct net_device *dev)
175{
176}
177
178static void br_dev_change_rx_flags(struct net_device *dev, int change)
179{
180 if (change & IFF_PROMISC)
181 br_manage_promisc(netdev_priv(dev));
182}
183
184static int br_dev_stop(struct net_device *dev)
185{
186 struct net_bridge *br = netdev_priv(dev);
187
188 br_stp_disable_bridge(br);
189 br_multicast_stop(br);
190
191 netif_stop_queue(dev);
192
193 return 0;
194}
195
196static void br_get_stats64(struct net_device *dev,
197 struct rtnl_link_stats64 *stats)
198{
199 struct net_bridge *br = netdev_priv(dev);
200 struct pcpu_sw_netstats tmp, sum = { 0 };
201 unsigned int cpu;
202
203 for_each_possible_cpu(cpu) {
204 unsigned int start;
205 const struct pcpu_sw_netstats *bstats
206 = per_cpu_ptr(br->stats, cpu);
207 do {
208 start = u64_stats_fetch_begin_irq(&bstats->syncp);
209 memcpy(&tmp, bstats, sizeof(tmp));
210 } while (u64_stats_fetch_retry_irq(&bstats->syncp, start));
211 sum.tx_bytes += tmp.tx_bytes;
212 sum.tx_packets += tmp.tx_packets;
213 sum.rx_bytes += tmp.rx_bytes;
214 sum.rx_packets += tmp.rx_packets;
215 }
216
217 stats->tx_bytes = sum.tx_bytes;
218 stats->tx_packets = sum.tx_packets;
219 stats->rx_bytes = sum.rx_bytes;
220 stats->rx_packets = sum.rx_packets;
221}
222
223static int br_change_mtu(struct net_device *dev, int new_mtu)
224{
225 struct net_bridge *br = netdev_priv(dev);
226
227 dev->mtu = new_mtu;
228
229 /* this flag will be cleared if the MTU was automatically adjusted */
230 br_opt_toggle(br, BROPT_MTU_SET_BY_USER, true);
231#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
232 /* remember the MTU in the rtable for PMTU */
233 dst_metric_set(&br->fake_rtable.dst, RTAX_MTU, new_mtu);
234#endif
235
236 return 0;
237}
238
239/* Allow setting mac address to any valid ethernet address. */
240static int br_set_mac_address(struct net_device *dev, void *p)
241{
242 struct net_bridge *br = netdev_priv(dev);
243 struct sockaddr *addr = p;
244
245 if (!is_valid_ether_addr(addr->sa_data))
246 return -EADDRNOTAVAIL;
247
248 spin_lock_bh(&br->lock);
249 if (!ether_addr_equal(dev->dev_addr, addr->sa_data)) {
250 /* Mac address will be changed in br_stp_change_bridge_id(). */
251 br_stp_change_bridge_id(br, addr->sa_data);
252 }
253 spin_unlock_bh(&br->lock);
254
255 return 0;
256}
257
258static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
259{
260 strlcpy(info->driver, "bridge", sizeof(info->driver));
261 strlcpy(info->version, BR_VERSION, sizeof(info->version));
262 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
263 strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
264}
265
266static netdev_features_t br_fix_features(struct net_device *dev,
267 netdev_features_t features)
268{
269 struct net_bridge *br = netdev_priv(dev);
270
271 return br_features_recompute(br, features);
272}
273
274#ifdef CONFIG_NET_POLL_CONTROLLER
275static void br_poll_controller(struct net_device *br_dev)
276{
277}
278
279static void br_netpoll_cleanup(struct net_device *dev)
280{
281 struct net_bridge *br = netdev_priv(dev);
282 struct net_bridge_port *p;
283
284 list_for_each_entry(p, &br->port_list, list)
285 br_netpoll_disable(p);
286}
287
288static int __br_netpoll_enable(struct net_bridge_port *p)
289{
290 struct netpoll *np;
291 int err;
292
293 np = kzalloc(sizeof(*p->np), GFP_KERNEL);
294 if (!np)
295 return -ENOMEM;
296
297 err = __netpoll_setup(np, p->dev);
298 if (err) {
299 kfree(np);
300 return err;
301 }
302
303 p->np = np;
304 return err;
305}
306
307int br_netpoll_enable(struct net_bridge_port *p)
308{
309 if (!p->br->dev->npinfo)
310 return 0;
311
312 return __br_netpoll_enable(p);
313}
314
315static int br_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
316{
317 struct net_bridge *br = netdev_priv(dev);
318 struct net_bridge_port *p;
319 int err = 0;
320
321 list_for_each_entry(p, &br->port_list, list) {
322 if (!p->dev)
323 continue;
324 err = __br_netpoll_enable(p);
325 if (err)
326 goto fail;
327 }
328
329out:
330 return err;
331
332fail:
333 br_netpoll_cleanup(dev);
334 goto out;
335}
336
337void br_netpoll_disable(struct net_bridge_port *p)
338{
339 struct netpoll *np = p->np;
340
341 if (!np)
342 return;
343
344 p->np = NULL;
345
346 __netpoll_free(np);
347}
348
349#endif
350
351static int br_add_slave(struct net_device *dev, struct net_device *slave_dev,
352 struct netlink_ext_ack *extack)
353
354{
355 struct net_bridge *br = netdev_priv(dev);
356
357 return br_add_if(br, slave_dev, extack);
358}
359
360static int br_del_slave(struct net_device *dev, struct net_device *slave_dev)
361{
362 struct net_bridge *br = netdev_priv(dev);
363
364 return br_del_if(br, slave_dev);
365}
366
367static const struct ethtool_ops br_ethtool_ops = {
368 .get_drvinfo = br_getinfo,
369 .get_link = ethtool_op_get_link,
370};
371
372static const struct net_device_ops br_netdev_ops = {
373 .ndo_open = br_dev_open,
374 .ndo_stop = br_dev_stop,
375 .ndo_init = br_dev_init,
376 .ndo_uninit = br_dev_uninit,
377 .ndo_start_xmit = br_dev_xmit,
378 .ndo_get_stats64 = br_get_stats64,
379 .ndo_set_mac_address = br_set_mac_address,
380 .ndo_set_rx_mode = br_dev_set_multicast_list,
381 .ndo_change_rx_flags = br_dev_change_rx_flags,
382 .ndo_change_mtu = br_change_mtu,
383 .ndo_do_ioctl = br_dev_ioctl,
384#ifdef CONFIG_NET_POLL_CONTROLLER
385 .ndo_netpoll_setup = br_netpoll_setup,
386 .ndo_netpoll_cleanup = br_netpoll_cleanup,
387 .ndo_poll_controller = br_poll_controller,
388#endif
389 .ndo_add_slave = br_add_slave,
390 .ndo_del_slave = br_del_slave,
391 .ndo_fix_features = br_fix_features,
392 .ndo_fdb_add = br_fdb_add,
393 .ndo_fdb_del = br_fdb_delete,
394 .ndo_fdb_dump = br_fdb_dump,
395 .ndo_fdb_get = br_fdb_get,
396 .ndo_bridge_getlink = br_getlink,
397 .ndo_bridge_setlink = br_setlink,
398 .ndo_bridge_dellink = br_dellink,
399 .ndo_features_check = passthru_features_check,
400};
401
402static struct device_type br_type = {
403 .name = "bridge",
404};
405
406void br_dev_setup(struct net_device *dev)
407{
408 struct net_bridge *br = netdev_priv(dev);
409
410 eth_hw_addr_random(dev);
411 ether_setup(dev);
412
413 dev->netdev_ops = &br_netdev_ops;
414 dev->needs_free_netdev = true;
415 dev->ethtool_ops = &br_ethtool_ops;
416 SET_NETDEV_DEVTYPE(dev, &br_type);
417 dev->priv_flags = IFF_EBRIDGE | IFF_NO_QUEUE;
418
419 dev->features = COMMON_FEATURES | NETIF_F_LLTX | NETIF_F_NETNS_LOCAL |
420 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
421 dev->hw_features = COMMON_FEATURES | NETIF_F_HW_VLAN_CTAG_TX |
422 NETIF_F_HW_VLAN_STAG_TX;
423 dev->vlan_features = COMMON_FEATURES;
424
425 br->dev = dev;
426 spin_lock_init(&br->lock);
427 INIT_LIST_HEAD(&br->port_list);
428 INIT_HLIST_HEAD(&br->fdb_list);
429 spin_lock_init(&br->hash_lock);
430
431 br->bridge_id.prio[0] = 0x80;
432 br->bridge_id.prio[1] = 0x00;
433
434 ether_addr_copy(br->group_addr, eth_stp_addr);
435
436 br->stp_enabled = BR_NO_STP;
437 br->group_fwd_mask = BR_GROUPFWD_DEFAULT;
438 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
439
440 br->designated_root = br->bridge_id;
441 br->bridge_max_age = br->max_age = 20 * HZ;
442 br->bridge_hello_time = br->hello_time = 2 * HZ;
443 br->bridge_forward_delay = br->forward_delay = 15 * HZ;
444 br->bridge_ageing_time = br->ageing_time = BR_DEFAULT_AGEING_TIME;
445 dev->max_mtu = ETH_MAX_MTU;
446
447 br_netfilter_rtable_init(br);
448 br_stp_timer_init(br);
449 br_multicast_init(br);
450 INIT_DELAYED_WORK(&br->gc_work, br_fdb_cleanup);
451}
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/* net device transmit always called with BH disabled */
26netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
27{
28 struct net_bridge *br = netdev_priv(dev);
29 const unsigned char *dest = skb->data;
30 struct net_bridge_fdb_entry *dst;
31 struct net_bridge_mdb_entry *mdst;
32 struct br_cpu_netstats *brstats = this_cpu_ptr(br->stats);
33
34#ifdef CONFIG_BRIDGE_NETFILTER
35 if (skb->nf_bridge && (skb->nf_bridge->mask & BRNF_BRIDGED_DNAT)) {
36 br_nf_pre_routing_finish_bridge_slow(skb);
37 return NETDEV_TX_OK;
38 }
39#endif
40
41 u64_stats_update_begin(&brstats->syncp);
42 brstats->tx_packets++;
43 brstats->tx_bytes += skb->len;
44 u64_stats_update_end(&brstats->syncp);
45
46 BR_INPUT_SKB_CB(skb)->brdev = dev;
47
48 skb_reset_mac_header(skb);
49 skb_pull(skb, ETH_HLEN);
50
51 rcu_read_lock();
52 if (is_broadcast_ether_addr(dest))
53 br_flood_deliver(br, skb);
54 else if (is_multicast_ether_addr(dest)) {
55 if (unlikely(netpoll_tx_running(dev))) {
56 br_flood_deliver(br, skb);
57 goto out;
58 }
59 if (br_multicast_rcv(br, NULL, skb)) {
60 kfree_skb(skb);
61 goto out;
62 }
63
64 mdst = br_mdb_get(br, skb);
65 if (mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb))
66 br_multicast_deliver(mdst, skb);
67 else
68 br_flood_deliver(br, skb);
69 } else if ((dst = __br_fdb_get(br, dest)) != NULL)
70 br_deliver(dst->dst, skb);
71 else
72 br_flood_deliver(br, skb);
73
74out:
75 rcu_read_unlock();
76 return NETDEV_TX_OK;
77}
78
79static int br_dev_init(struct net_device *dev)
80{
81 struct net_bridge *br = netdev_priv(dev);
82
83 br->stats = alloc_percpu(struct br_cpu_netstats);
84 if (!br->stats)
85 return -ENOMEM;
86
87 return 0;
88}
89
90static int br_dev_open(struct net_device *dev)
91{
92 struct net_bridge *br = netdev_priv(dev);
93
94 netdev_update_features(dev);
95 netif_start_queue(dev);
96 br_stp_enable_bridge(br);
97 br_multicast_open(br);
98
99 return 0;
100}
101
102static void br_dev_set_multicast_list(struct net_device *dev)
103{
104}
105
106static int br_dev_stop(struct net_device *dev)
107{
108 struct net_bridge *br = netdev_priv(dev);
109
110 br_stp_disable_bridge(br);
111 br_multicast_stop(br);
112
113 netif_stop_queue(dev);
114
115 return 0;
116}
117
118static struct rtnl_link_stats64 *br_get_stats64(struct net_device *dev,
119 struct rtnl_link_stats64 *stats)
120{
121 struct net_bridge *br = netdev_priv(dev);
122 struct br_cpu_netstats tmp, sum = { 0 };
123 unsigned int cpu;
124
125 for_each_possible_cpu(cpu) {
126 unsigned int start;
127 const struct br_cpu_netstats *bstats
128 = per_cpu_ptr(br->stats, cpu);
129 do {
130 start = u64_stats_fetch_begin(&bstats->syncp);
131 memcpy(&tmp, bstats, sizeof(tmp));
132 } while (u64_stats_fetch_retry(&bstats->syncp, start));
133 sum.tx_bytes += tmp.tx_bytes;
134 sum.tx_packets += tmp.tx_packets;
135 sum.rx_bytes += tmp.rx_bytes;
136 sum.rx_packets += tmp.rx_packets;
137 }
138
139 stats->tx_bytes = sum.tx_bytes;
140 stats->tx_packets = sum.tx_packets;
141 stats->rx_bytes = sum.rx_bytes;
142 stats->rx_packets = sum.rx_packets;
143
144 return stats;
145}
146
147static int br_change_mtu(struct net_device *dev, int new_mtu)
148{
149 struct net_bridge *br = netdev_priv(dev);
150 if (new_mtu < 68 || new_mtu > br_min_mtu(br))
151 return -EINVAL;
152
153 dev->mtu = new_mtu;
154
155#ifdef CONFIG_BRIDGE_NETFILTER
156 /* remember the MTU in the rtable for PMTU */
157 dst_metric_set(&br->fake_rtable.dst, RTAX_MTU, new_mtu);
158#endif
159
160 return 0;
161}
162
163/* Allow setting mac address to any valid ethernet address. */
164static int br_set_mac_address(struct net_device *dev, void *p)
165{
166 struct net_bridge *br = netdev_priv(dev);
167 struct sockaddr *addr = p;
168
169 if (!is_valid_ether_addr(addr->sa_data))
170 return -EADDRNOTAVAIL;
171
172 spin_lock_bh(&br->lock);
173 if (!ether_addr_equal(dev->dev_addr, addr->sa_data)) {
174 dev->addr_assign_type &= ~NET_ADDR_RANDOM;
175 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
176 br_fdb_change_mac_address(br, addr->sa_data);
177 br_stp_change_bridge_id(br, addr->sa_data);
178 }
179 br->flags |= BR_SET_MAC_ADDR;
180 spin_unlock_bh(&br->lock);
181
182 return 0;
183}
184
185static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
186{
187 strcpy(info->driver, "bridge");
188 strcpy(info->version, BR_VERSION);
189 strcpy(info->fw_version, "N/A");
190 strcpy(info->bus_info, "N/A");
191}
192
193static netdev_features_t br_fix_features(struct net_device *dev,
194 netdev_features_t features)
195{
196 struct net_bridge *br = netdev_priv(dev);
197
198 return br_features_recompute(br, features);
199}
200
201#ifdef CONFIG_NET_POLL_CONTROLLER
202static void br_poll_controller(struct net_device *br_dev)
203{
204}
205
206static void br_netpoll_cleanup(struct net_device *dev)
207{
208 struct net_bridge *br = netdev_priv(dev);
209 struct net_bridge_port *p, *n;
210
211 list_for_each_entry_safe(p, n, &br->port_list, list) {
212 br_netpoll_disable(p);
213 }
214}
215
216static int br_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
217{
218 struct net_bridge *br = netdev_priv(dev);
219 struct net_bridge_port *p, *n;
220 int err = 0;
221
222 list_for_each_entry_safe(p, n, &br->port_list, list) {
223 if (!p->dev)
224 continue;
225
226 err = br_netpoll_enable(p);
227 if (err)
228 goto fail;
229 }
230
231out:
232 return err;
233
234fail:
235 br_netpoll_cleanup(dev);
236 goto out;
237}
238
239int br_netpoll_enable(struct net_bridge_port *p)
240{
241 struct netpoll *np;
242 int err = 0;
243
244 np = kzalloc(sizeof(*p->np), GFP_KERNEL);
245 err = -ENOMEM;
246 if (!np)
247 goto out;
248
249 np->dev = p->dev;
250 strlcpy(np->dev_name, p->dev->name, IFNAMSIZ);
251
252 err = __netpoll_setup(np);
253 if (err) {
254 kfree(np);
255 goto out;
256 }
257
258 p->np = np;
259
260out:
261 return err;
262}
263
264void br_netpoll_disable(struct net_bridge_port *p)
265{
266 struct netpoll *np = p->np;
267
268 if (!np)
269 return;
270
271 p->np = NULL;
272
273 /* Wait for transmitting packets to finish before freeing. */
274 synchronize_rcu_bh();
275
276 __netpoll_cleanup(np);
277 kfree(np);
278}
279
280#endif
281
282static int br_add_slave(struct net_device *dev, struct net_device *slave_dev)
283
284{
285 struct net_bridge *br = netdev_priv(dev);
286
287 return br_add_if(br, slave_dev);
288}
289
290static int br_del_slave(struct net_device *dev, struct net_device *slave_dev)
291{
292 struct net_bridge *br = netdev_priv(dev);
293
294 return br_del_if(br, slave_dev);
295}
296
297static const struct ethtool_ops br_ethtool_ops = {
298 .get_drvinfo = br_getinfo,
299 .get_link = ethtool_op_get_link,
300};
301
302static const struct net_device_ops br_netdev_ops = {
303 .ndo_open = br_dev_open,
304 .ndo_stop = br_dev_stop,
305 .ndo_init = br_dev_init,
306 .ndo_start_xmit = br_dev_xmit,
307 .ndo_get_stats64 = br_get_stats64,
308 .ndo_set_mac_address = br_set_mac_address,
309 .ndo_set_rx_mode = br_dev_set_multicast_list,
310 .ndo_change_mtu = br_change_mtu,
311 .ndo_do_ioctl = br_dev_ioctl,
312#ifdef CONFIG_NET_POLL_CONTROLLER
313 .ndo_netpoll_setup = br_netpoll_setup,
314 .ndo_netpoll_cleanup = br_netpoll_cleanup,
315 .ndo_poll_controller = br_poll_controller,
316#endif
317 .ndo_add_slave = br_add_slave,
318 .ndo_del_slave = br_del_slave,
319 .ndo_fix_features = br_fix_features,
320 .ndo_fdb_add = br_fdb_add,
321 .ndo_fdb_del = br_fdb_delete,
322 .ndo_fdb_dump = br_fdb_dump,
323};
324
325static void br_dev_free(struct net_device *dev)
326{
327 struct net_bridge *br = netdev_priv(dev);
328
329 free_percpu(br->stats);
330 free_netdev(dev);
331}
332
333static struct device_type br_type = {
334 .name = "bridge",
335};
336
337void br_dev_setup(struct net_device *dev)
338{
339 struct net_bridge *br = netdev_priv(dev);
340
341 eth_hw_addr_random(dev);
342 ether_setup(dev);
343
344 dev->netdev_ops = &br_netdev_ops;
345 dev->destructor = br_dev_free;
346 SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
347 SET_NETDEV_DEVTYPE(dev, &br_type);
348 dev->tx_queue_len = 0;
349 dev->priv_flags = IFF_EBRIDGE;
350
351 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
352 NETIF_F_GSO_MASK | NETIF_F_HW_CSUM | NETIF_F_LLTX |
353 NETIF_F_NETNS_LOCAL | NETIF_F_HW_VLAN_TX;
354 dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
355 NETIF_F_GSO_MASK | NETIF_F_HW_CSUM |
356 NETIF_F_HW_VLAN_TX;
357
358 br->dev = dev;
359 spin_lock_init(&br->lock);
360 INIT_LIST_HEAD(&br->port_list);
361 spin_lock_init(&br->hash_lock);
362
363 br->bridge_id.prio[0] = 0x80;
364 br->bridge_id.prio[1] = 0x00;
365
366 memcpy(br->group_addr, br_group_address, ETH_ALEN);
367
368 br->stp_enabled = BR_NO_STP;
369 br->group_fwd_mask = BR_GROUPFWD_DEFAULT;
370
371 br->designated_root = br->bridge_id;
372 br->bridge_max_age = br->max_age = 20 * HZ;
373 br->bridge_hello_time = br->hello_time = 2 * HZ;
374 br->bridge_forward_delay = br->forward_delay = 15 * HZ;
375 br->ageing_time = 300 * HZ;
376
377 br_netfilter_rtable_init(br);
378 br_stp_timer_init(br);
379 br_multicast_init(br);
380}