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Linux 4.19-rc7
[linux-2.6/btrfs-unstable.git] / net / bridge / br_netlink.c
blobec2b58a09f76381b75179f38e438e190027a5102
1 /*
2 * Bridge netlink control interface
3 *
4 * Authors:
5 * Stephen Hemminger <shemminger@osdl.org>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/etherdevice.h>
16 #include <net/rtnetlink.h>
17 #include <net/net_namespace.h>
18 #include <net/sock.h>
19 #include <uapi/linux/if_bridge.h>
20
21 #include "br_private.h"
22 #include "br_private_stp.h"
23 #include "br_private_tunnel.h"
24
25 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
26 u32 filter_mask)
27 {
28 struct net_bridge_vlan *v;
29 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
30 u16 flags, pvid;
31 int num_vlans = 0;
32
33 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
34 return 0;
35
36 pvid = br_get_pvid(vg);
37 /* Count number of vlan infos */
38 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
39 flags = 0;
40 /* only a context, bridge vlan not activated */
41 if (!br_vlan_should_use(v))
42 continue;
43 if (v->vid == pvid)
44 flags |= BRIDGE_VLAN_INFO_PVID;
45
46 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
47 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
48
49 if (vid_range_start == 0) {
50 goto initvars;
51 } else if ((v->vid - vid_range_end) == 1 &&
52 flags == vid_range_flags) {
53 vid_range_end = v->vid;
54 continue;
55 } else {
56 if ((vid_range_end - vid_range_start) > 0)
57 num_vlans += 2;
58 else
59 num_vlans += 1;
60 }
61 initvars:
62 vid_range_start = v->vid;
63 vid_range_end = v->vid;
64 vid_range_flags = flags;
65 }
66
67 if (vid_range_start != 0) {
68 if ((vid_range_end - vid_range_start) > 0)
69 num_vlans += 2;
70 else
71 num_vlans += 1;
72 }
73
74 return num_vlans;
75 }
76
77 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
78 u32 filter_mask)
79 {
80 int num_vlans;
81
82 if (!vg)
83 return 0;
84
85 if (filter_mask & RTEXT_FILTER_BRVLAN)
86 return vg->num_vlans;
87
88 rcu_read_lock();
89 num_vlans = __get_num_vlan_infos(vg, filter_mask);
90 rcu_read_unlock();
91
92 return num_vlans;
93 }
94
95 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
96 u32 filter_mask)
97 {
98 struct net_bridge_vlan_group *vg = NULL;
99 struct net_bridge_port *p = NULL;
100 struct net_bridge *br;
101 int num_vlan_infos;
102 size_t vinfo_sz = 0;
103
104 rcu_read_lock();
105 if (br_port_exists(dev)) {
106 p = br_port_get_rcu(dev);
107 vg = nbp_vlan_group_rcu(p);
108 } else if (dev->priv_flags & IFF_EBRIDGE) {
109 br = netdev_priv(dev);
110 vg = br_vlan_group_rcu(br);
111 }
112 num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
113 rcu_read_unlock();
114
115 if (p && (p->flags & BR_VLAN_TUNNEL))
116 vinfo_sz += br_get_vlan_tunnel_info_size(vg);
117
118 /* Each VLAN is returned in bridge_vlan_info along with flags */
119 vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
120
121 return vinfo_sz;
122 }
123
124 static inline size_t br_port_info_size(void)
125 {
126 return nla_total_size(1) /* IFLA_BRPORT_STATE */
127 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */
128 + nla_total_size(4) /* IFLA_BRPORT_COST */
129 + nla_total_size(1) /* IFLA_BRPORT_MODE */
130 + nla_total_size(1) /* IFLA_BRPORT_GUARD */
131 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
132 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
133 + nla_total_size(1) /* IFLA_BRPORT_MCAST_TO_UCAST */
134 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
135 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
136 + nla_total_size(1) /* IFLA_BRPORT_MCAST_FLOOD */
137 + nla_total_size(1) /* IFLA_BRPORT_BCAST_FLOOD */
138 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
139 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
140 + nla_total_size(1) /* IFLA_BRPORT_VLAN_TUNNEL */
141 + nla_total_size(1) /* IFLA_BRPORT_NEIGH_SUPPRESS */
142 + nla_total_size(1) /* IFLA_BRPORT_ISOLATED */
143 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
144 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
145 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */
146 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */
147 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */
148 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */
149 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
150 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */
151 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
152 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
153 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
154 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
155 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */
156 #endif
157 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_GROUP_FWD_MASK */
158 + 0;
159 }
160
161 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
162 {
163 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
164 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
165 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
166 + nla_total_size(4) /* IFLA_MASTER */
167 + nla_total_size(4) /* IFLA_MTU */
168 + nla_total_size(4) /* IFLA_LINK */
169 + nla_total_size(1) /* IFLA_OPERSTATE */
170 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
171 + nla_total_size(br_get_link_af_size_filtered(dev,
172 filter_mask)) /* IFLA_AF_SPEC */
173 + nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */
174 }
175
176 static int br_port_fill_attrs(struct sk_buff *skb,
177 const struct net_bridge_port *p)
178 {
179 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
180 struct net_bridge_port *backup_p;
181 u64 timerval;
182
183 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
184 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
185 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
186 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
187 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
188 nla_put_u8(skb, IFLA_BRPORT_PROTECT,
189 !!(p->flags & BR_ROOT_BLOCK)) ||
190 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
191 !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
192 nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
193 !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
194 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
195 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
196 !!(p->flags & BR_FLOOD)) ||
197 nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
198 !!(p->flags & BR_MCAST_FLOOD)) ||
199 nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
200 !!(p->flags & BR_BCAST_FLOOD)) ||
201 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
202 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
203 !!(p->flags & BR_PROXYARP_WIFI)) ||
204 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
205 &p->designated_root) ||
206 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
207 &p->designated_bridge) ||
208 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
209 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
210 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
211 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
212 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
213 p->topology_change_ack) ||
214 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
215 nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
216 BR_VLAN_TUNNEL)) ||
217 nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
218 nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
219 !!(p->flags & BR_NEIGH_SUPPRESS)) ||
220 nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)))
221 return -EMSGSIZE;
222
223 timerval = br_timer_value(&p->message_age_timer);
224 if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
225 IFLA_BRPORT_PAD))
226 return -EMSGSIZE;
227 timerval = br_timer_value(&p->forward_delay_timer);
228 if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
229 IFLA_BRPORT_PAD))
230 return -EMSGSIZE;
231 timerval = br_timer_value(&p->hold_timer);
232 if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
233 IFLA_BRPORT_PAD))
234 return -EMSGSIZE;
235
236 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
237 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
238 p->multicast_router))
239 return -EMSGSIZE;
240 #endif
241
242 /* we might be called only with br->lock */
243 rcu_read_lock();
244 backup_p = rcu_dereference(p->backup_port);
245 if (backup_p)
246 nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT,
247 backup_p->dev->ifindex);
248 rcu_read_unlock();
249
250 return 0;
251 }
252
253 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
254 u16 vid_end, u16 flags)
255 {
256 struct bridge_vlan_info vinfo;
257
258 if ((vid_end - vid_start) > 0) {
259 /* add range to skb */
260 vinfo.vid = vid_start;
261 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
262 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
263 sizeof(vinfo), &vinfo))
264 goto nla_put_failure;
265
266 vinfo.vid = vid_end;
267 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
268 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
269 sizeof(vinfo), &vinfo))
270 goto nla_put_failure;
271 } else {
272 vinfo.vid = vid_start;
273 vinfo.flags = flags;
274 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
275 sizeof(vinfo), &vinfo))
276 goto nla_put_failure;
277 }
278
279 return 0;
280
281 nla_put_failure:
282 return -EMSGSIZE;
283 }
284
285 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
286 struct net_bridge_vlan_group *vg)
287 {
288 struct net_bridge_vlan *v;
289 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
290 u16 flags, pvid;
291 int err = 0;
292
293 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
294 * and mark vlan info with begin and end flags
295 * if vlaninfo represents a range
296 */
297 pvid = br_get_pvid(vg);
298 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
299 flags = 0;
300 if (!br_vlan_should_use(v))
301 continue;
302 if (v->vid == pvid)
303 flags |= BRIDGE_VLAN_INFO_PVID;
304
305 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
306 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
307
308 if (vid_range_start == 0) {
309 goto initvars;
310 } else if ((v->vid - vid_range_end) == 1 &&
311 flags == vid_range_flags) {
312 vid_range_end = v->vid;
313 continue;
314 } else {
315 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
316 vid_range_end,
317 vid_range_flags);
318 if (err)
319 return err;
320 }
321
322 initvars:
323 vid_range_start = v->vid;
324 vid_range_end = v->vid;
325 vid_range_flags = flags;
326 }
327
328 if (vid_range_start != 0) {
329 /* Call it once more to send any left over vlans */
330 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
331 vid_range_end,
332 vid_range_flags);
333 if (err)
334 return err;
335 }
336
337 return 0;
338 }
339
340 static int br_fill_ifvlaninfo(struct sk_buff *skb,
341 struct net_bridge_vlan_group *vg)
342 {
343 struct bridge_vlan_info vinfo;
344 struct net_bridge_vlan *v;
345 u16 pvid;
346
347 pvid = br_get_pvid(vg);
348 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
349 if (!br_vlan_should_use(v))
350 continue;
351
352 vinfo.vid = v->vid;
353 vinfo.flags = 0;
354 if (v->vid == pvid)
355 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
356
357 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
358 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
359
360 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
361 sizeof(vinfo), &vinfo))
362 goto nla_put_failure;
363 }
364
365 return 0;
366
367 nla_put_failure:
368 return -EMSGSIZE;
369 }
370
371 /*
372 * Create one netlink message for one interface
373 * Contains port and master info as well as carrier and bridge state.
374 */
375 static int br_fill_ifinfo(struct sk_buff *skb,
376 const struct net_bridge_port *port,
377 u32 pid, u32 seq, int event, unsigned int flags,
378 u32 filter_mask, const struct net_device *dev)
379 {
380 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
381 struct net_bridge *br;
382 struct ifinfomsg *hdr;
383 struct nlmsghdr *nlh;
384
385 if (port)
386 br = port->br;
387 else
388 br = netdev_priv(dev);
389
390 br_debug(br, "br_fill_info event %d port %s master %s\n",
391 event, dev->name, br->dev->name);
392
393 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
394 if (nlh == NULL)
395 return -EMSGSIZE;
396
397 hdr = nlmsg_data(nlh);
398 hdr->ifi_family = AF_BRIDGE;
399 hdr->__ifi_pad = 0;
400 hdr->ifi_type = dev->type;
401 hdr->ifi_index = dev->ifindex;
402 hdr->ifi_flags = dev_get_flags(dev);
403 hdr->ifi_change = 0;
404
405 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
406 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
407 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
408 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
409 (dev->addr_len &&
410 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
411 (dev->ifindex != dev_get_iflink(dev) &&
412 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
413 goto nla_put_failure;
414
415 if (event == RTM_NEWLINK && port) {
416 struct nlattr *nest
417 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
418
419 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
420 goto nla_put_failure;
421 nla_nest_end(skb, nest);
422 }
423
424 /* Check if the VID information is requested */
425 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
426 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
427 struct net_bridge_vlan_group *vg;
428 struct nlattr *af;
429 int err;
430
431 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
432 rcu_read_lock();
433 if (port)
434 vg = nbp_vlan_group_rcu(port);
435 else
436 vg = br_vlan_group_rcu(br);
437
438 if (!vg || !vg->num_vlans) {
439 rcu_read_unlock();
440 goto done;
441 }
442 af = nla_nest_start(skb, IFLA_AF_SPEC);
443 if (!af) {
444 rcu_read_unlock();
445 goto nla_put_failure;
446 }
447 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
448 err = br_fill_ifvlaninfo_compressed(skb, vg);
449 else
450 err = br_fill_ifvlaninfo(skb, vg);
451
452 if (port && (port->flags & BR_VLAN_TUNNEL))
453 err = br_fill_vlan_tunnel_info(skb, vg);
454 rcu_read_unlock();
455 if (err)
456 goto nla_put_failure;
457 nla_nest_end(skb, af);
458 }
459
460 done:
461 nlmsg_end(skb, nlh);
462 return 0;
463
464 nla_put_failure:
465 nlmsg_cancel(skb, nlh);
466 return -EMSGSIZE;
467 }
468
469 /* Notify listeners of a change in bridge or port information */
470 void br_ifinfo_notify(int event, const struct net_bridge *br,
471 const struct net_bridge_port *port)
472 {
473 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
474 struct net_device *dev;
475 struct sk_buff *skb;
476 int err = -ENOBUFS;
477 struct net *net;
478 u16 port_no = 0;
479
480 if (WARN_ON(!port && !br))
481 return;
482
483 if (port) {
484 dev = port->dev;
485 br = port->br;
486 port_no = port->port_no;
487 } else {
488 dev = br->dev;
489 }
490
491 net = dev_net(dev);
492 br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
493
494 skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
495 if (skb == NULL)
496 goto errout;
497
498 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev);
499 if (err < 0) {
500 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
501 WARN_ON(err == -EMSGSIZE);
502 kfree_skb(skb);
503 goto errout;
504 }
505 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
506 return;
507 errout:
508 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
509 }
510
511 /*
512 * Dump information about all ports, in response to GETLINK
513 */
514 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
515 struct net_device *dev, u32 filter_mask, int nlflags)
516 {
517 struct net_bridge_port *port = br_port_get_rtnl(dev);
518
519 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
520 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
521 return 0;
522
523 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
524 filter_mask, dev);
525 }
526
527 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
528 int cmd, struct bridge_vlan_info *vinfo, bool *changed)
529 {
530 bool curr_change;
531 int err = 0;
532
533 switch (cmd) {
534 case RTM_SETLINK:
535 if (p) {
536 /* if the MASTER flag is set this will act on the global
537 * per-VLAN entry as well
538 */
539 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
540 &curr_change);
541 } else {
542 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
543 err = br_vlan_add(br, vinfo->vid, vinfo->flags,
544 &curr_change);
545 }
546 if (curr_change)
547 *changed = true;
548 break;
549
550 case RTM_DELLINK:
551 if (p) {
552 if (!nbp_vlan_delete(p, vinfo->vid))
553 *changed = true;
554
555 if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
556 !br_vlan_delete(p->br, vinfo->vid))
557 *changed = true;
558 } else if (!br_vlan_delete(br, vinfo->vid)) {
559 *changed = true;
560 }
561 break;
562 }
563
564 return err;
565 }
566
567 static int br_process_vlan_info(struct net_bridge *br,
568 struct net_bridge_port *p, int cmd,
569 struct bridge_vlan_info *vinfo_curr,
570 struct bridge_vlan_info **vinfo_last,
571 bool *changed)
572 {
573 if (!vinfo_curr->vid || vinfo_curr->vid >= VLAN_VID_MASK)
574 return -EINVAL;
575
576 if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
577 /* check if we are already processing a range */
578 if (*vinfo_last)
579 return -EINVAL;
580 *vinfo_last = vinfo_curr;
581 /* don't allow range of pvids */
582 if ((*vinfo_last)->flags & BRIDGE_VLAN_INFO_PVID)
583 return -EINVAL;
584 return 0;
585 }
586
587 if (*vinfo_last) {
588 struct bridge_vlan_info tmp_vinfo;
589 int v, err;
590
591 if (!(vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END))
592 return -EINVAL;
593
594 if (vinfo_curr->vid <= (*vinfo_last)->vid)
595 return -EINVAL;
596
597 memcpy(&tmp_vinfo, *vinfo_last,
598 sizeof(struct bridge_vlan_info));
599 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
600 tmp_vinfo.vid = v;
601 err = br_vlan_info(br, p, cmd, &tmp_vinfo, changed);
602 if (err)
603 break;
604 }
605 *vinfo_last = NULL;
606
607 return err;
608 }
609
610 return br_vlan_info(br, p, cmd, vinfo_curr, changed);
611 }
612
613 static int br_afspec(struct net_bridge *br,
614 struct net_bridge_port *p,
615 struct nlattr *af_spec,
616 int cmd, bool *changed)
617 {
618 struct bridge_vlan_info *vinfo_curr = NULL;
619 struct bridge_vlan_info *vinfo_last = NULL;
620 struct nlattr *attr;
621 struct vtunnel_info tinfo_last = {};
622 struct vtunnel_info tinfo_curr = {};
623 int err = 0, rem;
624
625 nla_for_each_nested(attr, af_spec, rem) {
626 err = 0;
627 switch (nla_type(attr)) {
628 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
629 if (!p || !(p->flags & BR_VLAN_TUNNEL))
630 return -EINVAL;
631 err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
632 if (err)
633 return err;
634 err = br_process_vlan_tunnel_info(br, p, cmd,
635 &tinfo_curr,
636 &tinfo_last,
637 changed);
638 if (err)
639 return err;
640 break;
641 case IFLA_BRIDGE_VLAN_INFO:
642 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
643 return -EINVAL;
644 vinfo_curr = nla_data(attr);
645 err = br_process_vlan_info(br, p, cmd, vinfo_curr,
646 &vinfo_last, changed);
647 if (err)
648 return err;
649 break;
650 }
651 }
652
653 return err;
654 }
655
656 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
657 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
658 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
659 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
660 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
661 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
662 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
663 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
664 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
665 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
666 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
667 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
668 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
669 [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
670 [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
671 [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
672 [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
673 [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
674 [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
675 [IFLA_BRPORT_ISOLATED] = { .type = NLA_U8 },
676 [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
677 };
678
679 /* Change the state of the port and notify spanning tree */
680 static int br_set_port_state(struct net_bridge_port *p, u8 state)
681 {
682 if (state > BR_STATE_BLOCKING)
683 return -EINVAL;
684
685 /* if kernel STP is running, don't allow changes */
686 if (p->br->stp_enabled == BR_KERNEL_STP)
687 return -EBUSY;
688
689 /* if device is not up, change is not allowed
690 * if link is not present, only allowable state is disabled
691 */
692 if (!netif_running(p->dev) ||
693 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
694 return -ENETDOWN;
695
696 br_set_state(p, state);
697 br_port_state_selection(p->br);
698 return 0;
699 }
700
701 /* Set/clear or port flags based on attribute */
702 static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
703 int attrtype, unsigned long mask)
704 {
705 unsigned long flags;
706 int err;
707
708 if (!tb[attrtype])
709 return 0;
710
711 if (nla_get_u8(tb[attrtype]))
712 flags = p->flags | mask;
713 else
714 flags = p->flags & ~mask;
715
716 err = br_switchdev_set_port_flag(p, flags, mask);
717 if (err)
718 return err;
719
720 p->flags = flags;
721 return 0;
722 }
723
724 /* Process bridge protocol info on port */
725 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
726 {
727 unsigned long old_flags = p->flags;
728 bool br_vlan_tunnel_old = false;
729 int err;
730
731 err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
732 if (err)
733 return err;
734
735 err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
736 if (err)
737 return err;
738
739 err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
740 if (err)
741 return err;
742
743 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
744 if (err)
745 return err;
746
747 err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
748 if (err)
749 return err;
750
751 err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
752 if (err)
753 return err;
754
755 err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
756 if (err)
757 return err;
758
759 err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
760 if (err)
761 return err;
762
763 err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
764 if (err)
765 return err;
766
767 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
768 if (err)
769 return err;
770
771 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
772 if (err)
773 return err;
774
775 br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
776 err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
777 if (err)
778 return err;
779
780 if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
781 nbp_vlan_tunnel_info_flush(p);
782
783 if (tb[IFLA_BRPORT_COST]) {
784 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
785 if (err)
786 return err;
787 }
788
789 if (tb[IFLA_BRPORT_PRIORITY]) {
790 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
791 if (err)
792 return err;
793 }
794
795 if (tb[IFLA_BRPORT_STATE]) {
796 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
797 if (err)
798 return err;
799 }
800
801 if (tb[IFLA_BRPORT_FLUSH])
802 br_fdb_delete_by_port(p->br, p, 0, 0);
803
804 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
805 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
806 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
807
808 err = br_multicast_set_port_router(p, mcast_router);
809 if (err)
810 return err;
811 }
812 #endif
813
814 if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
815 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
816
817 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
818 return -EINVAL;
819 p->group_fwd_mask = fwd_mask;
820 }
821
822 err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
823 BR_NEIGH_SUPPRESS);
824 if (err)
825 return err;
826
827 err = br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
828 if (err)
829 return err;
830
831 if (tb[IFLA_BRPORT_BACKUP_PORT]) {
832 struct net_device *backup_dev = NULL;
833 u32 backup_ifindex;
834
835 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
836 if (backup_ifindex) {
837 backup_dev = __dev_get_by_index(dev_net(p->dev),
838 backup_ifindex);
839 if (!backup_dev)
840 return -ENOENT;
841 }
842
843 err = nbp_backup_change(p, backup_dev);
844 if (err)
845 return err;
846 }
847
848 br_port_flags_change(p, old_flags ^ p->flags);
849 return 0;
850 }
851
852 /* Change state and parameters on port. */
853 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
854 {
855 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
856 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
857 struct net_bridge_port *p;
858 struct nlattr *protinfo;
859 struct nlattr *afspec;
860 bool changed = false;
861 int err = 0;
862
863 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
864 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
865 if (!protinfo && !afspec)
866 return 0;
867
868 p = br_port_get_rtnl(dev);
869 /* We want to accept dev as bridge itself if the AF_SPEC
870 * is set to see if someone is setting vlan info on the bridge
871 */
872 if (!p && !afspec)
873 return -EINVAL;
874
875 if (p && protinfo) {
876 if (protinfo->nla_type & NLA_F_NESTED) {
877 err = nla_parse_nested(tb, IFLA_BRPORT_MAX, protinfo,
878 br_port_policy, NULL);
879 if (err)
880 return err;
881
882 spin_lock_bh(&p->br->lock);
883 err = br_setport(p, tb);
884 spin_unlock_bh(&p->br->lock);
885 } else {
886 /* Binary compatibility with old RSTP */
887 if (nla_len(protinfo) < sizeof(u8))
888 return -EINVAL;
889
890 spin_lock_bh(&p->br->lock);
891 err = br_set_port_state(p, nla_get_u8(protinfo));
892 spin_unlock_bh(&p->br->lock);
893 }
894 if (err)
895 goto out;
896 changed = true;
897 }
898
899 if (afspec)
900 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed);
901
902 if (changed)
903 br_ifinfo_notify(RTM_NEWLINK, br, p);
904 out:
905 return err;
906 }
907
908 /* Delete port information */
909 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
910 {
911 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
912 struct net_bridge_port *p;
913 struct nlattr *afspec;
914 bool changed = false;
915 int err = 0;
916
917 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
918 if (!afspec)
919 return 0;
920
921 p = br_port_get_rtnl(dev);
922 /* We want to accept dev as bridge itself as well */
923 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
924 return -EINVAL;
925
926 err = br_afspec(br, p, afspec, RTM_DELLINK, &changed);
927 if (changed)
928 /* Send RTM_NEWLINK because userspace
929 * expects RTM_NEWLINK for vlan dels
930 */
931 br_ifinfo_notify(RTM_NEWLINK, br, p);
932
933 return err;
934 }
935
936 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
937 struct netlink_ext_ack *extack)
938 {
939 if (tb[IFLA_ADDRESS]) {
940 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
941 return -EINVAL;
942 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
943 return -EADDRNOTAVAIL;
944 }
945
946 if (!data)
947 return 0;
948
949 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
950 if (data[IFLA_BR_VLAN_PROTOCOL]) {
951 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
952 case htons(ETH_P_8021Q):
953 case htons(ETH_P_8021AD):
954 break;
955 default:
956 return -EPROTONOSUPPORT;
957 }
958 }
959
960 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
961 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
962
963 if (defpvid >= VLAN_VID_MASK)
964 return -EINVAL;
965 }
966 #endif
967
968 return 0;
969 }
970
971 static int br_port_slave_changelink(struct net_device *brdev,
972 struct net_device *dev,
973 struct nlattr *tb[],
974 struct nlattr *data[],
975 struct netlink_ext_ack *extack)
976 {
977 struct net_bridge *br = netdev_priv(brdev);
978 int ret;
979
980 if (!data)
981 return 0;
982
983 spin_lock_bh(&br->lock);
984 ret = br_setport(br_port_get_rtnl(dev), data);
985 spin_unlock_bh(&br->lock);
986
987 return ret;
988 }
989
990 static int br_port_fill_slave_info(struct sk_buff *skb,
991 const struct net_device *brdev,
992 const struct net_device *dev)
993 {
994 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
995 }
996
997 static size_t br_port_get_slave_size(const struct net_device *brdev,
998 const struct net_device *dev)
999 {
1000 return br_port_info_size();
1001 }
1002
1003 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1004 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1005 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
1006 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
1007 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1008 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1009 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1010 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1011 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1012 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1013 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1014 .len = ETH_ALEN },
1015 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1016 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1017 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1018 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1019 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1020 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1021 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1022 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1023 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1024 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1025 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1026 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1027 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1028 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1029 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1030 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1031 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1032 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1033 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1034 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1035 [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1036 [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1037 };
1038
1039 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1040 struct nlattr *data[],
1041 struct netlink_ext_ack *extack)
1042 {
1043 struct net_bridge *br = netdev_priv(brdev);
1044 int err;
1045
1046 if (!data)
1047 return 0;
1048
1049 if (data[IFLA_BR_FORWARD_DELAY]) {
1050 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1051 if (err)
1052 return err;
1053 }
1054
1055 if (data[IFLA_BR_HELLO_TIME]) {
1056 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1057 if (err)
1058 return err;
1059 }
1060
1061 if (data[IFLA_BR_MAX_AGE]) {
1062 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1063 if (err)
1064 return err;
1065 }
1066
1067 if (data[IFLA_BR_AGEING_TIME]) {
1068 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1069 if (err)
1070 return err;
1071 }
1072
1073 if (data[IFLA_BR_STP_STATE]) {
1074 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1075
1076 br_stp_set_enabled(br, stp_enabled);
1077 }
1078
1079 if (data[IFLA_BR_PRIORITY]) {
1080 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1081
1082 br_stp_set_bridge_priority(br, priority);
1083 }
1084
1085 if (data[IFLA_BR_VLAN_FILTERING]) {
1086 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1087
1088 err = __br_vlan_filter_toggle(br, vlan_filter);
1089 if (err)
1090 return err;
1091 }
1092
1093 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1094 if (data[IFLA_BR_VLAN_PROTOCOL]) {
1095 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1096
1097 err = __br_vlan_set_proto(br, vlan_proto);
1098 if (err)
1099 return err;
1100 }
1101
1102 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1103 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1104
1105 err = __br_vlan_set_default_pvid(br, defpvid);
1106 if (err)
1107 return err;
1108 }
1109
1110 if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1111 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1112
1113 err = br_vlan_set_stats(br, vlan_stats);
1114 if (err)
1115 return err;
1116 }
1117 #endif
1118
1119 if (data[IFLA_BR_GROUP_FWD_MASK]) {
1120 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1121
1122 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1123 return -EINVAL;
1124 br->group_fwd_mask = fwd_mask;
1125 }
1126
1127 if (data[IFLA_BR_GROUP_ADDR]) {
1128 u8 new_addr[ETH_ALEN];
1129
1130 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1131 return -EINVAL;
1132 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1133 if (!is_link_local_ether_addr(new_addr))
1134 return -EINVAL;
1135 if (new_addr[5] == 1 || /* 802.3x Pause address */
1136 new_addr[5] == 2 || /* 802.3ad Slow protocols */
1137 new_addr[5] == 3) /* 802.1X PAE address */
1138 return -EINVAL;
1139 spin_lock_bh(&br->lock);
1140 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1141 spin_unlock_bh(&br->lock);
1142 br->group_addr_set = true;
1143 br_recalculate_fwd_mask(br);
1144 }
1145
1146 if (data[IFLA_BR_FDB_FLUSH])
1147 br_fdb_flush(br);
1148
1149 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1150 if (data[IFLA_BR_MCAST_ROUTER]) {
1151 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1152
1153 err = br_multicast_set_router(br, multicast_router);
1154 if (err)
1155 return err;
1156 }
1157
1158 if (data[IFLA_BR_MCAST_SNOOPING]) {
1159 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1160
1161 err = br_multicast_toggle(br, mcast_snooping);
1162 if (err)
1163 return err;
1164 }
1165
1166 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1167 u8 val;
1168
1169 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1170 br->multicast_query_use_ifaddr = !!val;
1171 }
1172
1173 if (data[IFLA_BR_MCAST_QUERIER]) {
1174 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1175
1176 err = br_multicast_set_querier(br, mcast_querier);
1177 if (err)
1178 return err;
1179 }
1180
1181 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
1182 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
1183
1184 br->hash_elasticity = val;
1185 }
1186
1187 if (data[IFLA_BR_MCAST_HASH_MAX]) {
1188 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1189
1190 err = br_multicast_set_hash_max(br, hash_max);
1191 if (err)
1192 return err;
1193 }
1194
1195 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1196 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1197
1198 br->multicast_last_member_count = val;
1199 }
1200
1201 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1202 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1203
1204 br->multicast_startup_query_count = val;
1205 }
1206
1207 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1208 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1209
1210 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1211 }
1212
1213 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1214 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1215
1216 br->multicast_membership_interval = clock_t_to_jiffies(val);
1217 }
1218
1219 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1220 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1221
1222 br->multicast_querier_interval = clock_t_to_jiffies(val);
1223 }
1224
1225 if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1226 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1227
1228 br->multicast_query_interval = clock_t_to_jiffies(val);
1229 }
1230
1231 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1232 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1233
1234 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1235 }
1236
1237 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1238 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1239
1240 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1241 }
1242
1243 if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1244 __u8 mcast_stats;
1245
1246 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1247 br->multicast_stats_enabled = !!mcast_stats;
1248 }
1249
1250 if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1251 __u8 igmp_version;
1252
1253 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1254 err = br_multicast_set_igmp_version(br, igmp_version);
1255 if (err)
1256 return err;
1257 }
1258
1259 #if IS_ENABLED(CONFIG_IPV6)
1260 if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1261 __u8 mld_version;
1262
1263 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1264 err = br_multicast_set_mld_version(br, mld_version);
1265 if (err)
1266 return err;
1267 }
1268 #endif
1269 #endif
1270 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1271 if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1272 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1273
1274 br->nf_call_iptables = val ? true : false;
1275 }
1276
1277 if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1278 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1279
1280 br->nf_call_ip6tables = val ? true : false;
1281 }
1282
1283 if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1284 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1285
1286 br->nf_call_arptables = val ? true : false;
1287 }
1288 #endif
1289
1290 return 0;
1291 }
1292
1293 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1294 struct nlattr *tb[], struct nlattr *data[],
1295 struct netlink_ext_ack *extack)
1296 {
1297 struct net_bridge *br = netdev_priv(dev);
1298 int err;
1299
1300 err = register_netdevice(dev);
1301 if (err)
1302 return err;
1303
1304 if (tb[IFLA_ADDRESS]) {
1305 spin_lock_bh(&br->lock);
1306 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1307 spin_unlock_bh(&br->lock);
1308 }
1309
1310 err = br_changelink(dev, tb, data, extack);
1311 if (err)
1312 br_dev_delete(dev, NULL);
1313
1314 return err;
1315 }
1316
1317 static size_t br_get_size(const struct net_device *brdev)
1318 {
1319 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
1320 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
1321 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
1322 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
1323 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
1324 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
1325 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
1326 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1327 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1328 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */
1329 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */
1330 #endif
1331 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
1332 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */
1333 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */
1334 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */
1335 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */
1336 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */
1337 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1338 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1339 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1340 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1341 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1342 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
1343 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1344 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */
1345 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */
1346 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1347 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */
1348 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */
1349 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */
1350 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */
1351 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1352 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1353 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1354 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1355 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1356 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1357 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1358 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1359 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */
1360 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */
1361 #endif
1362 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1363 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */
1364 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */
1365 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */
1366 #endif
1367 0;
1368 }
1369
1370 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1371 {
1372 struct net_bridge *br = netdev_priv(brdev);
1373 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1374 u32 hello_time = jiffies_to_clock_t(br->hello_time);
1375 u32 age_time = jiffies_to_clock_t(br->max_age);
1376 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1377 u32 stp_enabled = br->stp_enabled;
1378 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1379 u8 vlan_enabled = br_vlan_enabled(br->dev);
1380 u64 clockval;
1381
1382 clockval = br_timer_value(&br->hello_timer);
1383 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1384 return -EMSGSIZE;
1385 clockval = br_timer_value(&br->tcn_timer);
1386 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1387 return -EMSGSIZE;
1388 clockval = br_timer_value(&br->topology_change_timer);
1389 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1390 IFLA_BR_PAD))
1391 return -EMSGSIZE;
1392 clockval = br_timer_value(&br->gc_work.timer);
1393 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1394 return -EMSGSIZE;
1395
1396 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1397 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1398 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1399 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1400 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1401 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1402 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1403 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1404 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1405 &br->bridge_id) ||
1406 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1407 &br->designated_root) ||
1408 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1409 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1410 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1411 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1412 br->topology_change_detected) ||
1413 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1414 return -EMSGSIZE;
1415
1416 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1417 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1418 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1419 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled))
1420 return -EMSGSIZE;
1421 #endif
1422 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1423 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1424 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1425 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1426 br->multicast_query_use_ifaddr) ||
1427 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1428 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1429 br->multicast_stats_enabled) ||
1430 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1431 br->hash_elasticity) ||
1432 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1433 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1434 br->multicast_last_member_count) ||
1435 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1436 br->multicast_startup_query_count) ||
1437 nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1438 br->multicast_igmp_version))
1439 return -EMSGSIZE;
1440 #if IS_ENABLED(CONFIG_IPV6)
1441 if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1442 br->multicast_mld_version))
1443 return -EMSGSIZE;
1444 #endif
1445 clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1446 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1447 IFLA_BR_PAD))
1448 return -EMSGSIZE;
1449 clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1450 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1451 IFLA_BR_PAD))
1452 return -EMSGSIZE;
1453 clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1454 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1455 IFLA_BR_PAD))
1456 return -EMSGSIZE;
1457 clockval = jiffies_to_clock_t(br->multicast_query_interval);
1458 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1459 IFLA_BR_PAD))
1460 return -EMSGSIZE;
1461 clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1462 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1463 IFLA_BR_PAD))
1464 return -EMSGSIZE;
1465 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1466 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1467 IFLA_BR_PAD))
1468 return -EMSGSIZE;
1469 #endif
1470 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1471 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1472 br->nf_call_iptables ? 1 : 0) ||
1473 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1474 br->nf_call_ip6tables ? 1 : 0) ||
1475 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1476 br->nf_call_arptables ? 1 : 0))
1477 return -EMSGSIZE;
1478 #endif
1479
1480 return 0;
1481 }
1482
1483 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1484 {
1485 struct net_bridge_port *p = NULL;
1486 struct net_bridge_vlan_group *vg;
1487 struct net_bridge_vlan *v;
1488 struct net_bridge *br;
1489 int numvls = 0;
1490
1491 switch (attr) {
1492 case IFLA_STATS_LINK_XSTATS:
1493 br = netdev_priv(dev);
1494 vg = br_vlan_group(br);
1495 break;
1496 case IFLA_STATS_LINK_XSTATS_SLAVE:
1497 p = br_port_get_rtnl(dev);
1498 if (!p)
1499 return 0;
1500 br = p->br;
1501 vg = nbp_vlan_group(p);
1502 break;
1503 default:
1504 return 0;
1505 }
1506
1507 if (vg) {
1508 /* we need to count all, even placeholder entries */
1509 list_for_each_entry(v, &vg->vlan_list, vlist)
1510 numvls++;
1511 }
1512
1513 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1514 nla_total_size(sizeof(struct br_mcast_stats)) +
1515 nla_total_size(0);
1516 }
1517
1518 static int br_fill_linkxstats(struct sk_buff *skb,
1519 const struct net_device *dev,
1520 int *prividx, int attr)
1521 {
1522 struct nlattr *nla __maybe_unused;
1523 struct net_bridge_port *p = NULL;
1524 struct net_bridge_vlan_group *vg;
1525 struct net_bridge_vlan *v;
1526 struct net_bridge *br;
1527 struct nlattr *nest;
1528 int vl_idx = 0;
1529
1530 switch (attr) {
1531 case IFLA_STATS_LINK_XSTATS:
1532 br = netdev_priv(dev);
1533 vg = br_vlan_group(br);
1534 break;
1535 case IFLA_STATS_LINK_XSTATS_SLAVE:
1536 p = br_port_get_rtnl(dev);
1537 if (!p)
1538 return 0;
1539 br = p->br;
1540 vg = nbp_vlan_group(p);
1541 break;
1542 default:
1543 return -EINVAL;
1544 }
1545
1546 nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE);
1547 if (!nest)
1548 return -EMSGSIZE;
1549
1550 if (vg) {
1551 u16 pvid;
1552
1553 pvid = br_get_pvid(vg);
1554 list_for_each_entry(v, &vg->vlan_list, vlist) {
1555 struct bridge_vlan_xstats vxi;
1556 struct br_vlan_stats stats;
1557
1558 if (++vl_idx < *prividx)
1559 continue;
1560 memset(&vxi, 0, sizeof(vxi));
1561 vxi.vid = v->vid;
1562 vxi.flags = v->flags;
1563 if (v->vid == pvid)
1564 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1565 br_vlan_get_stats(v, &stats);
1566 vxi.rx_bytes = stats.rx_bytes;
1567 vxi.rx_packets = stats.rx_packets;
1568 vxi.tx_bytes = stats.tx_bytes;
1569 vxi.tx_packets = stats.tx_packets;
1570
1571 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1572 goto nla_put_failure;
1573 }
1574 }
1575
1576 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1577 if (++vl_idx >= *prividx) {
1578 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1579 sizeof(struct br_mcast_stats),
1580 BRIDGE_XSTATS_PAD);
1581 if (!nla)
1582 goto nla_put_failure;
1583 br_multicast_get_stats(br, p, nla_data(nla));
1584 }
1585 #endif
1586 nla_nest_end(skb, nest);
1587 *prividx = 0;
1588
1589 return 0;
1590
1591 nla_put_failure:
1592 nla_nest_end(skb, nest);
1593 *prividx = vl_idx;
1594
1595 return -EMSGSIZE;
1596 }
1597
1598 static struct rtnl_af_ops br_af_ops __read_mostly = {
1599 .family = AF_BRIDGE,
1600 .get_link_af_size = br_get_link_af_size_filtered,
1601 };
1602
1603 struct rtnl_link_ops br_link_ops __read_mostly = {
1604 .kind = "bridge",
1605 .priv_size = sizeof(struct net_bridge),
1606 .setup = br_dev_setup,
1607 .maxtype = IFLA_BR_MAX,
1608 .policy = br_policy,
1609 .validate = br_validate,
1610 .newlink = br_dev_newlink,
1611 .changelink = br_changelink,
1612 .dellink = br_dev_delete,
1613 .get_size = br_get_size,
1614 .fill_info = br_fill_info,
1615 .fill_linkxstats = br_fill_linkxstats,
1616 .get_linkxstats_size = br_get_linkxstats_size,
1617
1618 .slave_maxtype = IFLA_BRPORT_MAX,
1619 .slave_policy = br_port_policy,
1620 .slave_changelink = br_port_slave_changelink,
1621 .get_slave_size = br_port_get_slave_size,
1622 .fill_slave_info = br_port_fill_slave_info,
1623 };
1624
1625 int __init br_netlink_init(void)
1626 {
1627 int err;
1628
1629 br_mdb_init();
1630 rtnl_af_register(&br_af_ops);
1631
1632 err = rtnl_link_register(&br_link_ops);
1633 if (err)
1634 goto out_af;
1635
1636 return 0;
1637
1638 out_af:
1639 rtnl_af_unregister(&br_af_ops);
1640 br_mdb_uninit();
1641 return err;
1642 }
1643
1644 void br_netlink_fini(void)
1645 {
1646 br_mdb_uninit();
1647 rtnl_af_unregister(&br_af_ops);
1648 rtnl_link_unregister(&br_link_ops);
1649 }
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