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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Generic parts
4 * Linux ethernet bridge
5 *
6 * Authors:
7 * Lennert Buytenhek <buytenh@gnu.org>
8 */
9
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/netdevice.h>
13#include <linux/etherdevice.h>
14#include <linux/init.h>
15#include <linux/llc.h>
16#include <net/llc.h>
17#include <net/stp.h>
18#include <net/switchdev.h>
19
20#include "br_private.h"
21
22/*
23 * Handle changes in state of network devices enslaved to a bridge.
24 *
25 * Note: don't care about up/down if bridge itself is down, because
26 * port state is checked when bridge is brought up.
27 */
28static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
29{
30 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
31 struct netdev_notifier_pre_changeaddr_info *prechaddr_info;
32 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
33 struct net_bridge_port *p;
34 struct net_bridge *br;
35 bool notified = false;
36 bool changed_addr;
37 int err;
38
39 if (dev->priv_flags & IFF_EBRIDGE) {
40 err = br_vlan_bridge_event(dev, event, ptr);
41 if (err)
42 return notifier_from_errno(err);
43
44 if (event == NETDEV_REGISTER) {
45 /* register of bridge completed, add sysfs entries */
46 br_sysfs_addbr(dev);
47 return NOTIFY_DONE;
48 }
49 }
50
51 /* not a port of a bridge */
52 p = br_port_get_rtnl(dev);
53 if (!p)
54 return NOTIFY_DONE;
55
56 br = p->br;
57
58 switch (event) {
59 case NETDEV_CHANGEMTU:
60 br_mtu_auto_adjust(br);
61 break;
62
63 case NETDEV_PRE_CHANGEADDR:
64 if (br->dev->addr_assign_type == NET_ADDR_SET)
65 break;
66 prechaddr_info = ptr;
67 err = dev_pre_changeaddr_notify(br->dev,
68 prechaddr_info->dev_addr,
69 extack);
70 if (err)
71 return notifier_from_errno(err);
72 break;
73
74 case NETDEV_CHANGEADDR:
75 spin_lock_bh(&br->lock);
76 br_fdb_changeaddr(p, dev->dev_addr);
77 changed_addr = br_stp_recalculate_bridge_id(br);
78 spin_unlock_bh(&br->lock);
79
80 if (changed_addr)
81 call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
82
83 break;
84
85 case NETDEV_CHANGE:
86 br_port_carrier_check(p, ¬ified);
87 break;
88
89 case NETDEV_FEAT_CHANGE:
90 netdev_update_features(br->dev);
91 break;
92
93 case NETDEV_DOWN:
94 spin_lock_bh(&br->lock);
95 if (br->dev->flags & IFF_UP) {
96 br_stp_disable_port(p);
97 notified = true;
98 }
99 spin_unlock_bh(&br->lock);
100 break;
101
102 case NETDEV_UP:
103 if (netif_running(br->dev) && netif_oper_up(dev)) {
104 spin_lock_bh(&br->lock);
105 br_stp_enable_port(p);
106 notified = true;
107 spin_unlock_bh(&br->lock);
108 }
109 break;
110
111 case NETDEV_UNREGISTER:
112 br_del_if(br, dev);
113 break;
114
115 case NETDEV_CHANGENAME:
116 err = br_sysfs_renameif(p);
117 if (err)
118 return notifier_from_errno(err);
119 break;
120
121 case NETDEV_PRE_TYPE_CHANGE:
122 /* Forbid underlaying device to change its type. */
123 return NOTIFY_BAD;
124
125 case NETDEV_RESEND_IGMP:
126 /* Propagate to master device */
127 call_netdevice_notifiers(event, br->dev);
128 break;
129 }
130
131 if (event != NETDEV_UNREGISTER)
132 br_vlan_port_event(p, event);
133
134 /* Events that may cause spanning tree to refresh */
135 if (!notified && (event == NETDEV_CHANGEADDR || event == NETDEV_UP ||
136 event == NETDEV_CHANGE || event == NETDEV_DOWN))
137 br_ifinfo_notify(RTM_NEWLINK, NULL, p);
138
139 return NOTIFY_DONE;
140}
141
142static struct notifier_block br_device_notifier = {
143 .notifier_call = br_device_event
144};
145
146/* called with RTNL or RCU */
147static int br_switchdev_event(struct notifier_block *unused,
148 unsigned long event, void *ptr)
149{
150 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
151 struct net_bridge_port *p;
152 struct net_bridge *br;
153 struct switchdev_notifier_fdb_info *fdb_info;
154 int err = NOTIFY_DONE;
155
156 p = br_port_get_rtnl_rcu(dev);
157 if (!p)
158 goto out;
159
160 br = p->br;
161
162 switch (event) {
163 case SWITCHDEV_FDB_ADD_TO_BRIDGE:
164 fdb_info = ptr;
165 err = br_fdb_external_learn_add(br, p, fdb_info->addr,
166 fdb_info->vid, false);
167 if (err) {
168 err = notifier_from_errno(err);
169 break;
170 }
171 br_fdb_offloaded_set(br, p, fdb_info->addr,
172 fdb_info->vid, true);
173 break;
174 case SWITCHDEV_FDB_DEL_TO_BRIDGE:
175 fdb_info = ptr;
176 err = br_fdb_external_learn_del(br, p, fdb_info->addr,
177 fdb_info->vid, false);
178 if (err)
179 err = notifier_from_errno(err);
180 break;
181 case SWITCHDEV_FDB_OFFLOADED:
182 fdb_info = ptr;
183 br_fdb_offloaded_set(br, p, fdb_info->addr,
184 fdb_info->vid, fdb_info->offloaded);
185 break;
186 }
187
188out:
189 return err;
190}
191
192static struct notifier_block br_switchdev_notifier = {
193 .notifier_call = br_switchdev_event,
194};
195
196/* br_boolopt_toggle - change user-controlled boolean option
197 *
198 * @br: bridge device
199 * @opt: id of the option to change
200 * @on: new option value
201 * @extack: extack for error messages
202 *
203 * Changes the value of the respective boolean option to @on taking care of
204 * any internal option value mapping and configuration.
205 */
206int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
207 struct netlink_ext_ack *extack)
208{
209 switch (opt) {
210 case BR_BOOLOPT_NO_LL_LEARN:
211 br_opt_toggle(br, BROPT_NO_LL_LEARN, on);
212 break;
213 default:
214 /* shouldn't be called with unsupported options */
215 WARN_ON(1);
216 break;
217 }
218
219 return 0;
220}
221
222int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt)
223{
224 switch (opt) {
225 case BR_BOOLOPT_NO_LL_LEARN:
226 return br_opt_get(br, BROPT_NO_LL_LEARN);
227 default:
228 /* shouldn't be called with unsupported options */
229 WARN_ON(1);
230 break;
231 }
232
233 return 0;
234}
235
236int br_boolopt_multi_toggle(struct net_bridge *br,
237 struct br_boolopt_multi *bm,
238 struct netlink_ext_ack *extack)
239{
240 unsigned long bitmap = bm->optmask;
241 int err = 0;
242 int opt_id;
243
244 for_each_set_bit(opt_id, &bitmap, BR_BOOLOPT_MAX) {
245 bool on = !!(bm->optval & BIT(opt_id));
246
247 err = br_boolopt_toggle(br, opt_id, on, extack);
248 if (err) {
249 br_debug(br, "boolopt multi-toggle error: option: %d current: %d new: %d error: %d\n",
250 opt_id, br_boolopt_get(br, opt_id), on, err);
251 break;
252 }
253 }
254
255 return err;
256}
257
258void br_boolopt_multi_get(const struct net_bridge *br,
259 struct br_boolopt_multi *bm)
260{
261 u32 optval = 0;
262 int opt_id;
263
264 for (opt_id = 0; opt_id < BR_BOOLOPT_MAX; opt_id++)
265 optval |= (br_boolopt_get(br, opt_id) << opt_id);
266
267 bm->optval = optval;
268 bm->optmask = GENMASK((BR_BOOLOPT_MAX - 1), 0);
269}
270
271/* private bridge options, controlled by the kernel */
272void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on)
273{
274 bool cur = !!br_opt_get(br, opt);
275
276 br_debug(br, "toggle option: %d state: %d -> %d\n",
277 opt, cur, on);
278
279 if (cur == on)
280 return;
281
282 if (on)
283 set_bit(opt, &br->options);
284 else
285 clear_bit(opt, &br->options);
286}
287
288static void __net_exit br_net_exit(struct net *net)
289{
290 struct net_device *dev;
291 LIST_HEAD(list);
292
293 rtnl_lock();
294 for_each_netdev(net, dev)
295 if (dev->priv_flags & IFF_EBRIDGE)
296 br_dev_delete(dev, &list);
297
298 unregister_netdevice_many(&list);
299 rtnl_unlock();
300
301}
302
303static struct pernet_operations br_net_ops = {
304 .exit = br_net_exit,
305};
306
307static const struct stp_proto br_stp_proto = {
308 .rcv = br_stp_rcv,
309};
310
311static int __init br_init(void)
312{
313 int err;
314
315 BUILD_BUG_ON(sizeof(struct br_input_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
316
317 err = stp_proto_register(&br_stp_proto);
318 if (err < 0) {
319 pr_err("bridge: can't register sap for STP\n");
320 return err;
321 }
322
323 err = br_fdb_init();
324 if (err)
325 goto err_out;
326
327 err = register_pernet_subsys(&br_net_ops);
328 if (err)
329 goto err_out1;
330
331 err = br_nf_core_init();
332 if (err)
333 goto err_out2;
334
335 err = register_netdevice_notifier(&br_device_notifier);
336 if (err)
337 goto err_out3;
338
339 err = register_switchdev_notifier(&br_switchdev_notifier);
340 if (err)
341 goto err_out4;
342
343 err = br_netlink_init();
344 if (err)
345 goto err_out5;
346
347 brioctl_set(br_ioctl_deviceless_stub);
348
349#if IS_ENABLED(CONFIG_ATM_LANE)
350 br_fdb_test_addr_hook = br_fdb_test_addr;
351#endif
352
353#if IS_MODULE(CONFIG_BRIDGE_NETFILTER)
354 pr_info("bridge: filtering via arp/ip/ip6tables is no longer available "
355 "by default. Update your scripts to load br_netfilter if you "
356 "need this.\n");
357#endif
358
359 return 0;
360
361err_out5:
362 unregister_switchdev_notifier(&br_switchdev_notifier);
363err_out4:
364 unregister_netdevice_notifier(&br_device_notifier);
365err_out3:
366 br_nf_core_fini();
367err_out2:
368 unregister_pernet_subsys(&br_net_ops);
369err_out1:
370 br_fdb_fini();
371err_out:
372 stp_proto_unregister(&br_stp_proto);
373 return err;
374}
375
376static void __exit br_deinit(void)
377{
378 stp_proto_unregister(&br_stp_proto);
379 br_netlink_fini();
380 unregister_switchdev_notifier(&br_switchdev_notifier);
381 unregister_netdevice_notifier(&br_device_notifier);
382 brioctl_set(NULL);
383 unregister_pernet_subsys(&br_net_ops);
384
385 rcu_barrier(); /* Wait for completion of call_rcu()'s */
386
387 br_nf_core_fini();
388#if IS_ENABLED(CONFIG_ATM_LANE)
389 br_fdb_test_addr_hook = NULL;
390#endif
391 br_fdb_fini();
392}
393
394module_init(br_init)
395module_exit(br_deinit)
396MODULE_LICENSE("GPL");
397MODULE_VERSION(BR_VERSION);
398MODULE_ALIAS_RTNL_LINK("bridge");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Generic parts
4 * Linux ethernet bridge
5 *
6 * Authors:
7 * Lennert Buytenhek <buytenh@gnu.org>
8 */
9
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/netdevice.h>
13#include <linux/etherdevice.h>
14#include <linux/init.h>
15#include <linux/llc.h>
16#include <net/llc.h>
17#include <net/stp.h>
18#include <net/switchdev.h>
19
20#include "br_private.h"
21
22/*
23 * Handle changes in state of network devices enslaved to a bridge.
24 *
25 * Note: don't care about up/down if bridge itself is down, because
26 * port state is checked when bridge is brought up.
27 */
28static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
29{
30 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
31 struct netdev_notifier_pre_changeaddr_info *prechaddr_info;
32 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
33 struct net_bridge_port *p;
34 struct net_bridge *br;
35 bool notified = false;
36 bool changed_addr;
37 int err;
38
39 if (netif_is_bridge_master(dev)) {
40 err = br_vlan_bridge_event(dev, event, ptr);
41 if (err)
42 return notifier_from_errno(err);
43
44 if (event == NETDEV_REGISTER) {
45 /* register of bridge completed, add sysfs entries */
46 err = br_sysfs_addbr(dev);
47 if (err)
48 return notifier_from_errno(err);
49
50 return NOTIFY_DONE;
51 }
52 }
53
54 /* not a port of a bridge */
55 p = br_port_get_rtnl(dev);
56 if (!p)
57 return NOTIFY_DONE;
58
59 br = p->br;
60
61 switch (event) {
62 case NETDEV_CHANGEMTU:
63 br_mtu_auto_adjust(br);
64 break;
65
66 case NETDEV_PRE_CHANGEADDR:
67 if (br->dev->addr_assign_type == NET_ADDR_SET)
68 break;
69 prechaddr_info = ptr;
70 err = dev_pre_changeaddr_notify(br->dev,
71 prechaddr_info->dev_addr,
72 extack);
73 if (err)
74 return notifier_from_errno(err);
75 break;
76
77 case NETDEV_CHANGEADDR:
78 spin_lock_bh(&br->lock);
79 br_fdb_changeaddr(p, dev->dev_addr);
80 changed_addr = br_stp_recalculate_bridge_id(br);
81 spin_unlock_bh(&br->lock);
82
83 if (changed_addr)
84 call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
85
86 break;
87
88 case NETDEV_CHANGE:
89 br_port_carrier_check(p, ¬ified);
90 break;
91
92 case NETDEV_FEAT_CHANGE:
93 netdev_update_features(br->dev);
94 break;
95
96 case NETDEV_DOWN:
97 spin_lock_bh(&br->lock);
98 if (br->dev->flags & IFF_UP) {
99 br_stp_disable_port(p);
100 notified = true;
101 }
102 spin_unlock_bh(&br->lock);
103 break;
104
105 case NETDEV_UP:
106 if (netif_running(br->dev) && netif_oper_up(dev)) {
107 spin_lock_bh(&br->lock);
108 br_stp_enable_port(p);
109 notified = true;
110 spin_unlock_bh(&br->lock);
111 }
112 break;
113
114 case NETDEV_UNREGISTER:
115 br_del_if(br, dev);
116 break;
117
118 case NETDEV_CHANGENAME:
119 err = br_sysfs_renameif(p);
120 if (err)
121 return notifier_from_errno(err);
122 break;
123
124 case NETDEV_PRE_TYPE_CHANGE:
125 /* Forbid underlying device to change its type. */
126 return NOTIFY_BAD;
127
128 case NETDEV_RESEND_IGMP:
129 /* Propagate to master device */
130 call_netdevice_notifiers(event, br->dev);
131 break;
132 }
133
134 if (event != NETDEV_UNREGISTER)
135 br_vlan_port_event(p, event);
136
137 /* Events that may cause spanning tree to refresh */
138 if (!notified && (event == NETDEV_CHANGEADDR || event == NETDEV_UP ||
139 event == NETDEV_CHANGE || event == NETDEV_DOWN))
140 br_ifinfo_notify(RTM_NEWLINK, NULL, p);
141
142 return NOTIFY_DONE;
143}
144
145static struct notifier_block br_device_notifier = {
146 .notifier_call = br_device_event
147};
148
149/* called with RTNL or RCU */
150static int br_switchdev_event(struct notifier_block *unused,
151 unsigned long event, void *ptr)
152{
153 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
154 struct net_bridge_port *p;
155 struct net_bridge *br;
156 struct switchdev_notifier_fdb_info *fdb_info;
157 int err = NOTIFY_DONE;
158
159 p = br_port_get_rtnl_rcu(dev);
160 if (!p)
161 goto out;
162
163 br = p->br;
164
165 switch (event) {
166 case SWITCHDEV_FDB_ADD_TO_BRIDGE:
167 fdb_info = ptr;
168 err = br_fdb_external_learn_add(br, p, fdb_info->addr,
169 fdb_info->vid,
170 fdb_info->locked, false);
171 if (err) {
172 err = notifier_from_errno(err);
173 break;
174 }
175 br_fdb_offloaded_set(br, p, fdb_info->addr,
176 fdb_info->vid, fdb_info->offloaded);
177 break;
178 case SWITCHDEV_FDB_DEL_TO_BRIDGE:
179 fdb_info = ptr;
180 err = br_fdb_external_learn_del(br, p, fdb_info->addr,
181 fdb_info->vid, false);
182 if (err)
183 err = notifier_from_errno(err);
184 break;
185 case SWITCHDEV_FDB_OFFLOADED:
186 fdb_info = ptr;
187 br_fdb_offloaded_set(br, p, fdb_info->addr,
188 fdb_info->vid, fdb_info->offloaded);
189 break;
190 case SWITCHDEV_FDB_FLUSH_TO_BRIDGE:
191 fdb_info = ptr;
192 /* Don't delete static entries */
193 br_fdb_delete_by_port(br, p, fdb_info->vid, 0);
194 break;
195 }
196
197out:
198 return err;
199}
200
201static struct notifier_block br_switchdev_notifier = {
202 .notifier_call = br_switchdev_event,
203};
204
205/* called under rtnl_mutex */
206static int br_switchdev_blocking_event(struct notifier_block *nb,
207 unsigned long event, void *ptr)
208{
209 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
210 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
211 struct switchdev_notifier_brport_info *brport_info;
212 const struct switchdev_brport *b;
213 struct net_bridge_port *p;
214 int err = NOTIFY_DONE;
215
216 p = br_port_get_rtnl(dev);
217 if (!p)
218 goto out;
219
220 switch (event) {
221 case SWITCHDEV_BRPORT_OFFLOADED:
222 brport_info = ptr;
223 b = &brport_info->brport;
224
225 err = br_switchdev_port_offload(p, b->dev, b->ctx,
226 b->atomic_nb, b->blocking_nb,
227 b->tx_fwd_offload, extack);
228 err = notifier_from_errno(err);
229 break;
230 case SWITCHDEV_BRPORT_UNOFFLOADED:
231 brport_info = ptr;
232 b = &brport_info->brport;
233
234 br_switchdev_port_unoffload(p, b->ctx, b->atomic_nb,
235 b->blocking_nb);
236 break;
237 case SWITCHDEV_BRPORT_REPLAY:
238 brport_info = ptr;
239 b = &brport_info->brport;
240
241 err = br_switchdev_port_replay(p, b->dev, b->ctx, b->atomic_nb,
242 b->blocking_nb, extack);
243 err = notifier_from_errno(err);
244 break;
245 }
246
247out:
248 return err;
249}
250
251static struct notifier_block br_switchdev_blocking_notifier = {
252 .notifier_call = br_switchdev_blocking_event,
253};
254
255/* br_boolopt_toggle - change user-controlled boolean option
256 *
257 * @br: bridge device
258 * @opt: id of the option to change
259 * @on: new option value
260 * @extack: extack for error messages
261 *
262 * Changes the value of the respective boolean option to @on taking care of
263 * any internal option value mapping and configuration.
264 */
265int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
266 struct netlink_ext_ack *extack)
267{
268 int err = 0;
269
270 switch (opt) {
271 case BR_BOOLOPT_NO_LL_LEARN:
272 br_opt_toggle(br, BROPT_NO_LL_LEARN, on);
273 break;
274 case BR_BOOLOPT_MCAST_VLAN_SNOOPING:
275 err = br_multicast_toggle_vlan_snooping(br, on, extack);
276 break;
277 case BR_BOOLOPT_MST_ENABLE:
278 err = br_mst_set_enabled(br, on, extack);
279 break;
280 default:
281 /* shouldn't be called with unsupported options */
282 WARN_ON(1);
283 break;
284 }
285
286 return err;
287}
288
289int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt)
290{
291 switch (opt) {
292 case BR_BOOLOPT_NO_LL_LEARN:
293 return br_opt_get(br, BROPT_NO_LL_LEARN);
294 case BR_BOOLOPT_MCAST_VLAN_SNOOPING:
295 return br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED);
296 case BR_BOOLOPT_MST_ENABLE:
297 return br_opt_get(br, BROPT_MST_ENABLED);
298 default:
299 /* shouldn't be called with unsupported options */
300 WARN_ON(1);
301 break;
302 }
303
304 return 0;
305}
306
307int br_boolopt_multi_toggle(struct net_bridge *br,
308 struct br_boolopt_multi *bm,
309 struct netlink_ext_ack *extack)
310{
311 unsigned long bitmap = bm->optmask;
312 int err = 0;
313 int opt_id;
314
315 for_each_set_bit(opt_id, &bitmap, BR_BOOLOPT_MAX) {
316 bool on = !!(bm->optval & BIT(opt_id));
317
318 err = br_boolopt_toggle(br, opt_id, on, extack);
319 if (err) {
320 br_debug(br, "boolopt multi-toggle error: option: %d current: %d new: %d error: %d\n",
321 opt_id, br_boolopt_get(br, opt_id), on, err);
322 break;
323 }
324 }
325
326 return err;
327}
328
329void br_boolopt_multi_get(const struct net_bridge *br,
330 struct br_boolopt_multi *bm)
331{
332 u32 optval = 0;
333 int opt_id;
334
335 for (opt_id = 0; opt_id < BR_BOOLOPT_MAX; opt_id++)
336 optval |= (br_boolopt_get(br, opt_id) << opt_id);
337
338 bm->optval = optval;
339 bm->optmask = GENMASK((BR_BOOLOPT_MAX - 1), 0);
340}
341
342/* private bridge options, controlled by the kernel */
343void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on)
344{
345 bool cur = !!br_opt_get(br, opt);
346
347 br_debug(br, "toggle option: %d state: %d -> %d\n",
348 opt, cur, on);
349
350 if (cur == on)
351 return;
352
353 if (on)
354 set_bit(opt, &br->options);
355 else
356 clear_bit(opt, &br->options);
357}
358
359static void __net_exit br_net_exit_batch_rtnl(struct list_head *net_list,
360 struct list_head *dev_to_kill)
361{
362 struct net_device *dev;
363 struct net *net;
364
365 ASSERT_RTNL();
366 list_for_each_entry(net, net_list, exit_list)
367 for_each_netdev(net, dev)
368 if (netif_is_bridge_master(dev))
369 br_dev_delete(dev, dev_to_kill);
370}
371
372static struct pernet_operations br_net_ops = {
373 .exit_batch_rtnl = br_net_exit_batch_rtnl,
374};
375
376static const struct stp_proto br_stp_proto = {
377 .rcv = br_stp_rcv,
378};
379
380static int __init br_init(void)
381{
382 int err;
383
384 BUILD_BUG_ON(sizeof(struct br_input_skb_cb) > sizeof_field(struct sk_buff, cb));
385
386 err = stp_proto_register(&br_stp_proto);
387 if (err < 0) {
388 pr_err("bridge: can't register sap for STP\n");
389 return err;
390 }
391
392 err = br_fdb_init();
393 if (err)
394 goto err_out;
395
396 err = register_pernet_subsys(&br_net_ops);
397 if (err)
398 goto err_out1;
399
400 err = br_nf_core_init();
401 if (err)
402 goto err_out2;
403
404 err = register_netdevice_notifier(&br_device_notifier);
405 if (err)
406 goto err_out3;
407
408 err = register_switchdev_notifier(&br_switchdev_notifier);
409 if (err)
410 goto err_out4;
411
412 err = register_switchdev_blocking_notifier(&br_switchdev_blocking_notifier);
413 if (err)
414 goto err_out5;
415
416 err = br_netlink_init();
417 if (err)
418 goto err_out6;
419
420 brioctl_set(br_ioctl_stub);
421
422#if IS_ENABLED(CONFIG_ATM_LANE)
423 br_fdb_test_addr_hook = br_fdb_test_addr;
424#endif
425
426#if IS_MODULE(CONFIG_BRIDGE_NETFILTER)
427 pr_info("bridge: filtering via arp/ip/ip6tables is no longer available "
428 "by default. Update your scripts to load br_netfilter if you "
429 "need this.\n");
430#endif
431
432 return 0;
433
434err_out6:
435 unregister_switchdev_blocking_notifier(&br_switchdev_blocking_notifier);
436err_out5:
437 unregister_switchdev_notifier(&br_switchdev_notifier);
438err_out4:
439 unregister_netdevice_notifier(&br_device_notifier);
440err_out3:
441 br_nf_core_fini();
442err_out2:
443 unregister_pernet_subsys(&br_net_ops);
444err_out1:
445 br_fdb_fini();
446err_out:
447 stp_proto_unregister(&br_stp_proto);
448 return err;
449}
450
451static void __exit br_deinit(void)
452{
453 stp_proto_unregister(&br_stp_proto);
454 br_netlink_fini();
455 unregister_switchdev_blocking_notifier(&br_switchdev_blocking_notifier);
456 unregister_switchdev_notifier(&br_switchdev_notifier);
457 unregister_netdevice_notifier(&br_device_notifier);
458 brioctl_set(NULL);
459 unregister_pernet_subsys(&br_net_ops);
460
461 rcu_barrier(); /* Wait for completion of call_rcu()'s */
462
463 br_nf_core_fini();
464#if IS_ENABLED(CONFIG_ATM_LANE)
465 br_fdb_test_addr_hook = NULL;
466#endif
467 br_fdb_fini();
468}
469
470module_init(br_init)
471module_exit(br_deinit)
472MODULE_LICENSE("GPL");
473MODULE_VERSION(BR_VERSION);
474MODULE_ALIAS_RTNL_LINK("bridge");
475MODULE_DESCRIPTION("Ethernet bridge driver");