Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Userspace interface | |
3 | * Linux ethernet bridge | |
4 | * | |
5 | * Authors: | |
6 | * Lennert Buytenhek <buytenh@gnu.org> | |
7 | * | |
1da177e4 LT |
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> | |
77f98598 | 16 | #include <linux/etherdevice.h> |
c06ee961 | 17 | #include <linux/netpoll.h> |
1da177e4 LT |
18 | #include <linux/ethtool.h> |
19 | #include <linux/if_arp.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/rtnetlink.h> | |
46f25dff | 23 | #include <linux/if_ether.h> |
5a0e3ad6 | 24 | #include <linux/slab.h> |
c6e970a0 | 25 | #include <net/dsa.h> |
1da177e4 | 26 | #include <net/sock.h> |
407af329 | 27 | #include <linux/if_vlan.h> |
56607386 | 28 | #include <net/switchdev.h> |
705e0dea | 29 | #include <net/net_namespace.h> |
1da177e4 LT |
30 | |
31 | #include "br_private.h" | |
32 | ||
33 | /* | |
34 | * Determine initial path cost based on speed. | |
35 | * using recommendations from 802.1d standard | |
36 | * | |
61a44b9c | 37 | * Since driver might sleep need to not be holding any locks. |
1da177e4 | 38 | */ |
4433f420 | 39 | static int port_cost(struct net_device *dev) |
1da177e4 | 40 | { |
702b26a2 | 41 | struct ethtool_link_ksettings ecmd; |
b4a488d1 | 42 | |
702b26a2 DD |
43 | if (!__ethtool_get_link_ksettings(dev, &ecmd)) { |
44 | switch (ecmd.base.speed) { | |
fa3df928 JP |
45 | case SPEED_10000: |
46 | return 2; | |
47 | case SPEED_1000: | |
48 | return 4; | |
49 | case SPEED_100: | |
50 | return 19; | |
51 | case SPEED_10: | |
52 | return 100; | |
1da177e4 LT |
53 | } |
54 | } | |
55 | ||
56 | /* Old silly heuristics based on name */ | |
57 | if (!strncmp(dev->name, "lec", 3)) | |
58 | return 7; | |
59 | ||
60 | if (!strncmp(dev->name, "plip", 4)) | |
61 | return 2500; | |
62 | ||
63 | return 100; /* assume old 10Mbps */ | |
64 | } | |
65 | ||
4433f420 | 66 | |
1a81a2e0 | 67 | /* Check for port carrier transitions. */ |
faa1cd82 | 68 | void br_port_carrier_check(struct net_bridge_port *p, bool *notified) |
4433f420 | 69 | { |
269def7c SH |
70 | struct net_device *dev = p->dev; |
71 | struct net_bridge *br = p->br; | |
6e86b890 | 72 | |
8f3359bd | 73 | if (!(p->flags & BR_ADMIN_COST) && |
74 | netif_running(dev) && netif_oper_up(dev)) | |
6e86b890 SH |
75 | p->path_cost = port_cost(dev); |
76 | ||
faa1cd82 | 77 | *notified = false; |
aa7c6e5f | 78 | if (!netif_running(br->dev)) |
79 | return; | |
80 | ||
81 | spin_lock_bh(&br->lock); | |
576eb625 | 82 | if (netif_running(dev) && netif_oper_up(dev)) { |
faa1cd82 | 83 | if (p->state == BR_STATE_DISABLED) { |
aa7c6e5f | 84 | br_stp_enable_port(p); |
faa1cd82 NA |
85 | *notified = true; |
86 | } | |
aa7c6e5f | 87 | } else { |
faa1cd82 | 88 | if (p->state != BR_STATE_DISABLED) { |
aa7c6e5f | 89 | br_stp_disable_port(p); |
faa1cd82 NA |
90 | *notified = true; |
91 | } | |
4433f420 | 92 | } |
aa7c6e5f | 93 | spin_unlock_bh(&br->lock); |
4433f420 SH |
94 | } |
95 | ||
2796d0c6 VY |
96 | static void br_port_set_promisc(struct net_bridge_port *p) |
97 | { | |
98 | int err = 0; | |
99 | ||
100 | if (br_promisc_port(p)) | |
101 | return; | |
102 | ||
103 | err = dev_set_promiscuity(p->dev, 1); | |
104 | if (err) | |
105 | return; | |
106 | ||
107 | br_fdb_unsync_static(p->br, p); | |
108 | p->flags |= BR_PROMISC; | |
109 | } | |
110 | ||
111 | static void br_port_clear_promisc(struct net_bridge_port *p) | |
112 | { | |
113 | int err; | |
114 | ||
115 | /* Check if the port is already non-promisc or if it doesn't | |
116 | * support UNICAST filtering. Without unicast filtering support | |
117 | * we'll end up re-enabling promisc mode anyway, so just check for | |
118 | * it here. | |
119 | */ | |
120 | if (!br_promisc_port(p) || !(p->dev->priv_flags & IFF_UNICAST_FLT)) | |
121 | return; | |
122 | ||
123 | /* Since we'll be clearing the promisc mode, program the port | |
124 | * first so that we don't have interruption in traffic. | |
125 | */ | |
126 | err = br_fdb_sync_static(p->br, p); | |
127 | if (err) | |
128 | return; | |
129 | ||
130 | dev_set_promiscuity(p->dev, -1); | |
131 | p->flags &= ~BR_PROMISC; | |
132 | } | |
133 | ||
134 | /* When a port is added or removed or when certain port flags | |
135 | * change, this function is called to automatically manage | |
136 | * promiscuity setting of all the bridge ports. We are always called | |
137 | * under RTNL so can skip using rcu primitives. | |
138 | */ | |
139 | void br_manage_promisc(struct net_bridge *br) | |
140 | { | |
141 | struct net_bridge_port *p; | |
142 | bool set_all = false; | |
143 | ||
144 | /* If vlan filtering is disabled or bridge interface is placed | |
145 | * into promiscuous mode, place all ports in promiscuous mode. | |
146 | */ | |
1f51445a | 147 | if ((br->dev->flags & IFF_PROMISC) || !br_vlan_enabled(br->dev)) |
2796d0c6 VY |
148 | set_all = true; |
149 | ||
150 | list_for_each_entry(p, &br->port_list, list) { | |
151 | if (set_all) { | |
152 | br_port_set_promisc(p); | |
153 | } else { | |
154 | /* If the number of auto-ports is <= 1, then all other | |
155 | * ports will have their output configuration | |
156 | * statically specified through fdbs. Since ingress | |
157 | * on the auto-port becomes forwarding/egress to other | |
158 | * ports and egress configuration is statically known, | |
159 | * we can say that ingress configuration of the | |
160 | * auto-port is also statically known. | |
161 | * This lets us disable promiscuous mode and write | |
162 | * this config to hw. | |
163 | */ | |
e0a47d1f TM |
164 | if (br->auto_cnt == 0 || |
165 | (br->auto_cnt == 1 && br_auto_port(p))) | |
2796d0c6 VY |
166 | br_port_clear_promisc(p); |
167 | else | |
168 | br_port_set_promisc(p); | |
169 | } | |
170 | } | |
171 | } | |
172 | ||
e028e4b8 VY |
173 | static void nbp_update_port_count(struct net_bridge *br) |
174 | { | |
175 | struct net_bridge_port *p; | |
176 | u32 cnt = 0; | |
177 | ||
178 | list_for_each_entry(p, &br->port_list, list) { | |
179 | if (br_auto_port(p)) | |
180 | cnt++; | |
181 | } | |
2796d0c6 VY |
182 | if (br->auto_cnt != cnt) { |
183 | br->auto_cnt = cnt; | |
184 | br_manage_promisc(br); | |
185 | } | |
186 | } | |
187 | ||
188 | static void nbp_delete_promisc(struct net_bridge_port *p) | |
189 | { | |
025559ee | 190 | /* If port is currently promiscuous, unset promiscuity. |
2796d0c6 VY |
191 | * Otherwise, it is a static port so remove all addresses |
192 | * from it. | |
193 | */ | |
194 | dev_set_allmulti(p->dev, -1); | |
195 | if (br_promisc_port(p)) | |
196 | dev_set_promiscuity(p->dev, -1); | |
197 | else | |
198 | br_fdb_unsync_static(p->br, p); | |
e028e4b8 VY |
199 | } |
200 | ||
bab1deea SH |
201 | static void release_nbp(struct kobject *kobj) |
202 | { | |
203 | struct net_bridge_port *p | |
204 | = container_of(kobj, struct net_bridge_port, kobj); | |
205 | kfree(p); | |
206 | } | |
207 | ||
705e0dea TH |
208 | static void brport_get_ownership(struct kobject *kobj, kuid_t *uid, kgid_t *gid) |
209 | { | |
210 | struct net_bridge_port *p = kobj_to_brport(kobj); | |
211 | ||
212 | net_ns_get_ownership(dev_net(p->dev), uid, gid); | |
213 | } | |
214 | ||
bab1deea SH |
215 | static struct kobj_type brport_ktype = { |
216 | #ifdef CONFIG_SYSFS | |
217 | .sysfs_ops = &brport_sysfs_ops, | |
218 | #endif | |
219 | .release = release_nbp, | |
705e0dea | 220 | .get_ownership = brport_get_ownership, |
bab1deea SH |
221 | }; |
222 | ||
1da177e4 LT |
223 | static void destroy_nbp(struct net_bridge_port *p) |
224 | { | |
225 | struct net_device *dev = p->dev; | |
226 | ||
1da177e4 LT |
227 | p->br = NULL; |
228 | p->dev = NULL; | |
229 | dev_put(dev); | |
230 | ||
bab1deea | 231 | kobject_put(&p->kobj); |
1da177e4 LT |
232 | } |
233 | ||
234 | static void destroy_nbp_rcu(struct rcu_head *head) | |
235 | { | |
236 | struct net_bridge_port *p = | |
237 | container_of(head, struct net_bridge_port, rcu); | |
238 | destroy_nbp(p); | |
239 | } | |
240 | ||
45493d47 PA |
241 | static unsigned get_max_headroom(struct net_bridge *br) |
242 | { | |
243 | unsigned max_headroom = 0; | |
244 | struct net_bridge_port *p; | |
245 | ||
246 | list_for_each_entry(p, &br->port_list, list) { | |
247 | unsigned dev_headroom = netdev_get_fwd_headroom(p->dev); | |
248 | ||
249 | if (dev_headroom > max_headroom) | |
250 | max_headroom = dev_headroom; | |
251 | } | |
252 | ||
253 | return max_headroom; | |
254 | } | |
255 | ||
256 | static void update_headroom(struct net_bridge *br, int new_hr) | |
257 | { | |
258 | struct net_bridge_port *p; | |
259 | ||
260 | list_for_each_entry(p, &br->port_list, list) | |
261 | netdev_set_rx_headroom(p->dev, new_hr); | |
262 | ||
263 | br->dev->needed_headroom = new_hr; | |
264 | } | |
265 | ||
3f4cfc2d SH |
266 | /* Delete port(interface) from bridge is done in two steps. |
267 | * via RCU. First step, marks device as down. That deletes | |
268 | * all the timers and stops new packets from flowing through. | |
269 | * | |
270 | * Final cleanup doesn't occur until after all CPU's finished | |
271 | * processing packets. | |
272 | * | |
273 | * Protected from multiple admin operations by RTNL mutex | |
274 | */ | |
1da177e4 LT |
275 | static void del_nbp(struct net_bridge_port *p) |
276 | { | |
277 | struct net_bridge *br = p->br; | |
278 | struct net_device *dev = p->dev; | |
279 | ||
b3bcb72e | 280 | sysfs_remove_link(br->ifobj, p->dev->name); |
bab1deea | 281 | |
2796d0c6 | 282 | nbp_delete_promisc(p); |
1da177e4 LT |
283 | |
284 | spin_lock_bh(&br->lock); | |
285 | br_stp_disable_port(p); | |
286 | spin_unlock_bh(&br->lock); | |
287 | ||
92899063 | 288 | br_ifinfo_notify(RTM_DELLINK, NULL, p); |
b86c4503 | 289 | |
1da177e4 | 290 | list_del_rcu(&p->list); |
45493d47 PA |
291 | if (netdev_get_fwd_headroom(dev) == br->dev->needed_headroom) |
292 | update_headroom(br, get_max_headroom(br)); | |
293 | netdev_reset_rx_headroom(dev); | |
1da177e4 | 294 | |
f409d0ed | 295 | nbp_vlan_flush(p); |
1ea2d020 | 296 | br_fdb_delete_by_port(br, p, 0, 1); |
56607386 JP |
297 | switchdev_deferred_process(); |
298 | ||
e028e4b8 VY |
299 | nbp_update_port_count(br); |
300 | ||
0f49579a JP |
301 | netdev_upper_dev_unlink(dev, br->dev); |
302 | ||
f350a0a8 JP |
303 | dev->priv_flags &= ~IFF_BRIDGE_PORT; |
304 | ||
ab95bfe0 | 305 | netdev_rx_handler_unregister(dev); |
b3f1be4b | 306 | |
3fe2d7c7 HX |
307 | br_multicast_del_port(p); |
308 | ||
125a12cc | 309 | kobject_uevent(&p->kobj, KOBJ_REMOVE); |
bab1deea SH |
310 | kobject_del(&p->kobj); |
311 | ||
91d2c34a HX |
312 | br_netpoll_disable(p); |
313 | ||
1da177e4 LT |
314 | call_rcu(&p->rcu, destroy_nbp_rcu); |
315 | } | |
316 | ||
1ce5cce8 | 317 | /* Delete bridge device */ |
318 | void br_dev_delete(struct net_device *dev, struct list_head *head) | |
1da177e4 | 319 | { |
1ce5cce8 | 320 | struct net_bridge *br = netdev_priv(dev); |
1da177e4 LT |
321 | struct net_bridge_port *p, *n; |
322 | ||
323 | list_for_each_entry_safe(p, n, &br->port_list, list) { | |
1da177e4 LT |
324 | del_nbp(p); |
325 | } | |
326 | ||
821f1b21 RP |
327 | br_recalculate_neigh_suppress_enabled(br); |
328 | ||
1ea2d020 | 329 | br_fdb_delete_by_port(br, NULL, 0, 1); |
f8730420 | 330 | |
f7cdee8a | 331 | cancel_delayed_work_sync(&br->gc_work); |
1da177e4 LT |
332 | |
333 | br_sysfs_delbr(br->dev); | |
8c56ba05 | 334 | unregister_netdevice_queue(br->dev, head); |
1da177e4 LT |
335 | } |
336 | ||
1da177e4 LT |
337 | /* find an available port number */ |
338 | static int find_portno(struct net_bridge *br) | |
339 | { | |
340 | int index; | |
341 | struct net_bridge_port *p; | |
342 | unsigned long *inuse; | |
343 | ||
3b781fa1 | 344 | inuse = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long), |
1da177e4 LT |
345 | GFP_KERNEL); |
346 | if (!inuse) | |
347 | return -ENOMEM; | |
348 | ||
1da177e4 LT |
349 | set_bit(0, inuse); /* zero is reserved */ |
350 | list_for_each_entry(p, &br->port_list, list) { | |
351 | set_bit(p->port_no, inuse); | |
352 | } | |
353 | index = find_first_zero_bit(inuse, BR_MAX_PORTS); | |
354 | kfree(inuse); | |
355 | ||
356 | return (index >= BR_MAX_PORTS) ? -EXFULL : index; | |
357 | } | |
358 | ||
4433f420 | 359 | /* called with RTNL but without bridge lock */ |
9d6f229f | 360 | static struct net_bridge_port *new_nbp(struct net_bridge *br, |
4433f420 | 361 | struct net_device *dev) |
1da177e4 | 362 | { |
1da177e4 | 363 | struct net_bridge_port *p; |
1080ab95 | 364 | int index, err; |
9d6f229f | 365 | |
1da177e4 LT |
366 | index = find_portno(br); |
367 | if (index < 0) | |
368 | return ERR_PTR(index); | |
369 | ||
cee48541 | 370 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
1da177e4 LT |
371 | if (p == NULL) |
372 | return ERR_PTR(-ENOMEM); | |
373 | ||
1da177e4 LT |
374 | p->br = br; |
375 | dev_hold(dev); | |
376 | p->dev = dev; | |
4433f420 | 377 | p->path_cost = port_cost(dev); |
9d6f229f | 378 | p->priority = 0x8000 >> BR_PORT_BITS; |
1da177e4 | 379 | p->port_no = index; |
99f906e9 | 380 | p->flags = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD; |
1da177e4 | 381 | br_init_port(p); |
775dd692 | 382 | br_set_state(p, BR_STATE_DISABLED); |
d32439c0 | 383 | br_stp_port_timer_init(p); |
1080ab95 NA |
384 | err = br_multicast_add_port(p); |
385 | if (err) { | |
386 | dev_put(dev); | |
387 | kfree(p); | |
388 | p = ERR_PTR(err); | |
389 | } | |
1da177e4 LT |
390 | |
391 | return p; | |
392 | } | |
393 | ||
4aa678ba | 394 | int br_add_bridge(struct net *net, const char *name) |
1da177e4 LT |
395 | { |
396 | struct net_device *dev; | |
11f3a6bd | 397 | int res; |
1da177e4 | 398 | |
c835a677 | 399 | dev = alloc_netdev(sizeof(struct net_bridge), name, NET_NAME_UNKNOWN, |
bb900b27 | 400 | br_dev_setup); |
401 | ||
9d6f229f | 402 | if (!dev) |
1da177e4 LT |
403 | return -ENOMEM; |
404 | ||
bb900b27 | 405 | dev_net_set(dev, net); |
149ddd83 | 406 | dev->rtnl_link_ops = &br_link_ops; |
e340a90e | 407 | |
11f3a6bd ED |
408 | res = register_netdev(dev); |
409 | if (res) | |
410 | free_netdev(dev); | |
411 | return res; | |
1da177e4 LT |
412 | } |
413 | ||
4aa678ba | 414 | int br_del_bridge(struct net *net, const char *name) |
1da177e4 LT |
415 | { |
416 | struct net_device *dev; | |
417 | int ret = 0; | |
418 | ||
419 | rtnl_lock(); | |
4aa678ba | 420 | dev = __dev_get_by_name(net, name); |
9d6f229f | 421 | if (dev == NULL) |
1da177e4 LT |
422 | ret = -ENXIO; /* Could not find device */ |
423 | ||
424 | else if (!(dev->priv_flags & IFF_EBRIDGE)) { | |
425 | /* Attempt to delete non bridge device! */ | |
426 | ret = -EPERM; | |
427 | } | |
428 | ||
429 | else if (dev->flags & IFF_UP) { | |
430 | /* Not shutdown yet. */ | |
431 | ret = -EBUSY; | |
9d6f229f | 432 | } |
1da177e4 | 433 | |
9d6f229f | 434 | else |
1ce5cce8 | 435 | br_dev_delete(dev, NULL); |
1da177e4 LT |
436 | |
437 | rtnl_unlock(); | |
438 | return ret; | |
439 | } | |
440 | ||
804b854d NA |
441 | /* MTU of the bridge pseudo-device: ETH_DATA_LEN or the minimum of the ports */ |
442 | static int br_mtu_min(const struct net_bridge *br) | |
1da177e4 LT |
443 | { |
444 | const struct net_bridge_port *p; | |
f40aa233 | 445 | int ret_mtu = 0; |
1da177e4 | 446 | |
804b854d NA |
447 | list_for_each_entry(p, &br->port_list, list) |
448 | if (!ret_mtu || ret_mtu > p->dev->mtu) | |
f40aa233 | 449 | ret_mtu = p->dev->mtu; |
1da177e4 | 450 | |
f40aa233 | 451 | return ret_mtu ? ret_mtu : ETH_DATA_LEN; |
419d14af CW |
452 | } |
453 | ||
804b854d NA |
454 | void br_mtu_auto_adjust(struct net_bridge *br) |
455 | { | |
456 | ASSERT_RTNL(); | |
457 | ||
458 | /* if the bridge MTU was manually configured don't mess with it */ | |
459 | if (br->mtu_set_by_user) | |
460 | return; | |
461 | ||
462 | /* change to the minimum MTU and clear the flag which was set by | |
463 | * the bridge ndo_change_mtu callback | |
464 | */ | |
465 | dev_set_mtu(br->dev, br_mtu_min(br)); | |
466 | br->mtu_set_by_user = false; | |
467 | } | |
468 | ||
ae74f100 ED |
469 | static void br_set_gso_limits(struct net_bridge *br) |
470 | { | |
471 | unsigned int gso_max_size = GSO_MAX_SIZE; | |
472 | u16 gso_max_segs = GSO_MAX_SEGS; | |
473 | const struct net_bridge_port *p; | |
474 | ||
475 | list_for_each_entry(p, &br->port_list, list) { | |
476 | gso_max_size = min(gso_max_size, p->dev->gso_max_size); | |
477 | gso_max_segs = min(gso_max_segs, p->dev->gso_max_segs); | |
478 | } | |
479 | br->dev->gso_max_size = gso_max_size; | |
480 | br->dev->gso_max_segs = gso_max_segs; | |
481 | } | |
482 | ||
81d35307 SH |
483 | /* |
484 | * Recomputes features using slave's features | |
485 | */ | |
c8f44aff MM |
486 | netdev_features_t br_features_recompute(struct net_bridge *br, |
487 | netdev_features_t features) | |
81d35307 SH |
488 | { |
489 | struct net_bridge_port *p; | |
c8f44aff | 490 | netdev_features_t mask; |
81d35307 | 491 | |
b63365a2 | 492 | if (list_empty(&br->port_list)) |
c4d27ef9 | 493 | return features; |
b63365a2 | 494 | |
c4d27ef9 | 495 | mask = features; |
b63365a2 | 496 | features &= ~NETIF_F_ONE_FOR_ALL; |
81d35307 SH |
497 | |
498 | list_for_each_entry(p, &br->port_list, list) { | |
b63365a2 HX |
499 | features = netdev_increment_features(features, |
500 | p->dev->features, mask); | |
81d35307 | 501 | } |
f902e881 | 502 | features = netdev_add_tso_features(features, mask); |
81d35307 | 503 | |
c4d27ef9 | 504 | return features; |
81d35307 SH |
505 | } |
506 | ||
1da177e4 | 507 | /* called with RTNL */ |
ca752be0 DA |
508 | int br_add_if(struct net_bridge *br, struct net_device *dev, |
509 | struct netlink_ext_ack *extack) | |
1da177e4 LT |
510 | { |
511 | struct net_bridge_port *p; | |
512 | int err = 0; | |
45493d47 | 513 | unsigned br_hr, dev_hr; |
edf947f1 | 514 | bool changed_addr; |
1da177e4 | 515 | |
8db0a2ee FF |
516 | /* Don't allow bridging non-ethernet like devices, or DSA-enabled |
517 | * master network devices since the bridge layer rx_handler prevents | |
518 | * the DSA fake ethertype handler to be invoked, so we do not strip off | |
519 | * the DSA switch tag protocol header and the bridge layer just return | |
520 | * RX_HANDLER_CONSUMED, stopping RX processing for these frames. | |
521 | */ | |
1056bd51 | 522 | if ((dev->flags & IFF_LOOPBACK) || |
77f98598 | 523 | dev->type != ARPHRD_ETHER || dev->addr_len != ETH_ALEN || |
8db0a2ee FF |
524 | !is_valid_ether_addr(dev->dev_addr) || |
525 | netdev_uses_dsa(dev)) | |
1da177e4 LT |
526 | return -EINVAL; |
527 | ||
1056bd51 | 528 | /* No bridging of bridges */ |
ca752be0 DA |
529 | if (dev->netdev_ops->ndo_start_xmit == br_dev_xmit) { |
530 | NL_SET_ERR_MSG(extack, | |
531 | "Can not enslave a bridge to a bridge"); | |
1da177e4 | 532 | return -ELOOP; |
ca752be0 | 533 | } |
1da177e4 | 534 | |
e8238fc2 HL |
535 | /* Device has master upper dev */ |
536 | if (netdev_master_upper_dev_get(dev)) | |
1da177e4 LT |
537 | return -EBUSY; |
538 | ||
ad4bb6f8 | 539 | /* No bridging devices that dislike that (e.g. wireless) */ |
ca752be0 DA |
540 | if (dev->priv_flags & IFF_DONT_BRIDGE) { |
541 | NL_SET_ERR_MSG(extack, | |
542 | "Device does not allow enslaving to a bridge"); | |
ad4bb6f8 | 543 | return -EOPNOTSUPP; |
ca752be0 | 544 | } |
ad4bb6f8 | 545 | |
bab1deea SH |
546 | p = new_nbp(br, dev); |
547 | if (IS_ERR(p)) | |
1da177e4 LT |
548 | return PTR_ERR(p); |
549 | ||
bb8ed630 AW |
550 | call_netdevice_notifiers(NETDEV_JOIN, dev); |
551 | ||
2796d0c6 | 552 | err = dev_set_allmulti(dev, 1); |
bc3f9076 WC |
553 | if (err) |
554 | goto put_back; | |
555 | ||
e32cc736 GKH |
556 | err = kobject_init_and_add(&p->kobj, &brport_ktype, &(dev->dev.kobj), |
557 | SYSFS_BRIDGE_PORT_ATTR); | |
bab1deea SH |
558 | if (err) |
559 | goto err1; | |
1da177e4 | 560 | |
bab1deea SH |
561 | err = br_sysfs_addif(p); |
562 | if (err) | |
563 | goto err2; | |
1da177e4 | 564 | |
a8779ec1 | 565 | err = br_netpoll_enable(p); |
93d8bf9f | 566 | if (err) |
91d2c34a HX |
567 | goto err3; |
568 | ||
0f49579a | 569 | err = netdev_rx_handler_register(dev, br_handle_frame, p); |
ab95bfe0 | 570 | if (err) |
9b1536c4 | 571 | goto err4; |
f350a0a8 | 572 | |
0f49579a JP |
573 | dev->priv_flags |= IFF_BRIDGE_PORT; |
574 | ||
ca752be0 | 575 | err = netdev_master_upper_dev_link(dev, br->dev, NULL, NULL, extack); |
afc6151a | 576 | if (err) |
9b1536c4 | 577 | goto err5; |
afc6151a | 578 | |
6bc506b4 IS |
579 | err = nbp_switchdev_mark_set(p); |
580 | if (err) | |
581 | goto err6; | |
582 | ||
0187bdfb | 583 | dev_disable_lro(dev); |
bab1deea SH |
584 | |
585 | list_add_rcu(&p->list, &br->port_list); | |
586 | ||
e028e4b8 VY |
587 | nbp_update_port_count(br); |
588 | ||
c4d27ef9 MM |
589 | netdev_update_features(br->dev); |
590 | ||
45493d47 PA |
591 | br_hr = br->dev->needed_headroom; |
592 | dev_hr = netdev_get_fwd_headroom(dev); | |
593 | if (br_hr < dev_hr) | |
594 | update_headroom(br, dev_hr); | |
595 | else | |
596 | netdev_set_rx_headroom(dev, br_hr); | |
fd094808 | 597 | |
a4b816d8 TM |
598 | if (br_fdb_insert(br, p, dev->dev_addr, 0)) |
599 | netdev_err(dev, "failed insert local address bridge forwarding table\n"); | |
600 | ||
08474cc1 ER |
601 | err = nbp_vlan_init(p); |
602 | if (err) { | |
5be5a2df | 603 | netdev_err(dev, "failed to initialize vlan filtering on this port\n"); |
6bc506b4 | 604 | goto err7; |
08474cc1 | 605 | } |
5be5a2df | 606 | |
bab1deea | 607 | spin_lock_bh(&br->lock); |
edf947f1 | 608 | changed_addr = br_stp_recalculate_bridge_id(br); |
de79059e | 609 | |
576eb625 | 610 | if (netif_running(dev) && netif_oper_up(dev) && |
de79059e AS |
611 | (br->dev->flags & IFF_UP)) |
612 | br_stp_enable_port(p); | |
bab1deea SH |
613 | spin_unlock_bh(&br->lock); |
614 | ||
92899063 | 615 | br_ifinfo_notify(RTM_NEWLINK, NULL, p); |
b86c4503 | 616 | |
edf947f1 | 617 | if (changed_addr) |
56139fc5 | 618 | call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev); |
edf947f1 | 619 | |
804b854d | 620 | br_mtu_auto_adjust(br); |
ae74f100 | 621 | br_set_gso_limits(br); |
269def7c | 622 | |
bab1deea | 623 | kobject_uevent(&p->kobj, KOBJ_ADD); |
1da177e4 | 624 | |
bab1deea | 625 | return 0; |
afc6151a | 626 | |
6bc506b4 | 627 | err7: |
08474cc1 ER |
628 | list_del_rcu(&p->list); |
629 | br_fdb_delete_by_port(br, p, 0, 1); | |
630 | nbp_update_port_count(br); | |
6bc506b4 | 631 | err6: |
08474cc1 | 632 | netdev_upper_dev_unlink(dev, br->dev); |
9b1536c4 | 633 | err5: |
0f49579a JP |
634 | dev->priv_flags &= ~IFF_BRIDGE_PORT; |
635 | netdev_rx_handler_unregister(dev); | |
9b1536c4 G |
636 | err4: |
637 | br_netpoll_disable(p); | |
91d2c34a HX |
638 | err3: |
639 | sysfs_remove_link(br->ifobj, p->dev->name); | |
bab1deea | 640 | err2: |
c587aea9 | 641 | kobject_put(&p->kobj); |
30df94f8 | 642 | p = NULL; /* kobject_put frees */ |
77f98598 | 643 | err1: |
019ee792 | 644 | dev_set_allmulti(dev, -1); |
43af8532 VL |
645 | put_back: |
646 | dev_put(dev); | |
bc3f9076 | 647 | kfree(p); |
1da177e4 LT |
648 | return err; |
649 | } | |
650 | ||
651 | /* called with RTNL */ | |
652 | int br_del_if(struct net_bridge *br, struct net_device *dev) | |
653 | { | |
f350a0a8 | 654 | struct net_bridge_port *p; |
9be6dd65 | 655 | bool changed_addr; |
f350a0a8 | 656 | |
ec1e5610 | 657 | p = br_port_get_rtnl(dev); |
b5ed54e9 | 658 | if (!p || p->br != br) |
1da177e4 LT |
659 | return -EINVAL; |
660 | ||
d30362c0 AW |
661 | /* Since more than one interface can be attached to a bridge, |
662 | * there still maybe an alternate path for netconsole to use; | |
663 | * therefore there is no reason for a NETDEV_RELEASE event. | |
664 | */ | |
1da177e4 LT |
665 | del_nbp(p); |
666 | ||
804b854d | 667 | br_mtu_auto_adjust(br); |
ae74f100 | 668 | br_set_gso_limits(br); |
4c906c27 | 669 | |
1da177e4 | 670 | spin_lock_bh(&br->lock); |
9be6dd65 | 671 | changed_addr = br_stp_recalculate_bridge_id(br); |
1da177e4 LT |
672 | spin_unlock_bh(&br->lock); |
673 | ||
9be6dd65 AW |
674 | if (changed_addr) |
675 | call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev); | |
676 | ||
c4d27ef9 MM |
677 | netdev_update_features(br->dev); |
678 | ||
1da177e4 LT |
679 | return 0; |
680 | } | |
e028e4b8 VY |
681 | |
682 | void br_port_flags_change(struct net_bridge_port *p, unsigned long mask) | |
683 | { | |
684 | struct net_bridge *br = p->br; | |
685 | ||
686 | if (mask & BR_AUTO_MASK) | |
687 | nbp_update_port_count(br); | |
821f1b21 RP |
688 | |
689 | if (mask & BR_NEIGH_SUPPRESS) | |
690 | br_recalculate_neigh_suppress_enabled(br); | |
e028e4b8 | 691 | } |