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1#include <linux/err.h>
2#include <linux/igmp.h>
3#include <linux/kernel.h>
4#include <linux/netdevice.h>
5#include <linux/rculist.h>
6#include <linux/skbuff.h>
7#include <linux/if_ether.h>
8#include <net/ip.h>
9#include <net/netlink.h>
10#include <net/switchdev.h>
11#if IS_ENABLED(CONFIG_IPV6)
12#include <net/ipv6.h>
13#include <net/addrconf.h>
14#endif
15
16#include "br_private.h"
17
18static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
19 struct net_device *dev)
20{
21 struct net_bridge *br = netdev_priv(dev);
22 struct net_bridge_port *p;
23 struct nlattr *nest, *port_nest;
24
25 if (!br->multicast_router || hlist_empty(&br->router_list))
26 return 0;
27
28 nest = nla_nest_start(skb, MDBA_ROUTER);
29 if (nest == NULL)
30 return -EMSGSIZE;
31
32 hlist_for_each_entry_rcu(p, &br->router_list, rlist) {
33 if (!p)
34 continue;
35 port_nest = nla_nest_start(skb, MDBA_ROUTER_PORT);
36 if (!port_nest)
37 goto fail;
38 if (nla_put_nohdr(skb, sizeof(u32), &p->dev->ifindex) ||
39 nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER,
40 br_timer_value(&p->multicast_router_timer)) ||
41 nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE,
42 p->multicast_router)) {
43 nla_nest_cancel(skb, port_nest);
44 goto fail;
45 }
46 nla_nest_end(skb, port_nest);
47 }
48
49 nla_nest_end(skb, nest);
50 return 0;
51fail:
52 nla_nest_cancel(skb, nest);
53 return -EMSGSIZE;
54}
55
56static void __mdb_entry_fill_flags(struct br_mdb_entry *e, unsigned char flags)
57{
58 e->state = flags & MDB_PG_FLAGS_PERMANENT;
59 e->flags = 0;
60 if (flags & MDB_PG_FLAGS_OFFLOAD)
61 e->flags |= MDB_FLAGS_OFFLOAD;
62}
63
64static void __mdb_entry_to_br_ip(struct br_mdb_entry *entry, struct br_ip *ip)
65{
66 memset(ip, 0, sizeof(struct br_ip));
67 ip->vid = entry->vid;
68 ip->proto = entry->addr.proto;
69 if (ip->proto == htons(ETH_P_IP))
70 ip->u.ip4 = entry->addr.u.ip4;
71#if IS_ENABLED(CONFIG_IPV6)
72 else
73 ip->u.ip6 = entry->addr.u.ip6;
74#endif
75}
76
77static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
78 struct net_device *dev)
79{
80 struct net_bridge *br = netdev_priv(dev);
81 struct net_bridge_mdb_htable *mdb;
82 struct nlattr *nest, *nest2;
83 int i, err = 0;
84 int idx = 0, s_idx = cb->args[1];
85
86 if (br->multicast_disabled)
87 return 0;
88
89 mdb = rcu_dereference(br->mdb);
90 if (!mdb)
91 return 0;
92
93 nest = nla_nest_start(skb, MDBA_MDB);
94 if (nest == NULL)
95 return -EMSGSIZE;
96
97 for (i = 0; i < mdb->max; i++) {
98 struct net_bridge_mdb_entry *mp;
99 struct net_bridge_port_group *p;
100 struct net_bridge_port_group __rcu **pp;
101 struct net_bridge_port *port;
102
103 hlist_for_each_entry_rcu(mp, &mdb->mhash[i], hlist[mdb->ver]) {
104 if (idx < s_idx)
105 goto skip;
106
107 nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
108 if (nest2 == NULL) {
109 err = -EMSGSIZE;
110 goto out;
111 }
112
113 for (pp = &mp->ports;
114 (p = rcu_dereference(*pp)) != NULL;
115 pp = &p->next) {
116 struct nlattr *nest_ent;
117 struct br_mdb_entry e;
118
119 port = p->port;
120 if (!port)
121 continue;
122
123 memset(&e, 0, sizeof(e));
124 e.ifindex = port->dev->ifindex;
125 e.vid = p->addr.vid;
126 __mdb_entry_fill_flags(&e, p->flags);
127 if (p->addr.proto == htons(ETH_P_IP))
128 e.addr.u.ip4 = p->addr.u.ip4;
129#if IS_ENABLED(CONFIG_IPV6)
130 if (p->addr.proto == htons(ETH_P_IPV6))
131 e.addr.u.ip6 = p->addr.u.ip6;
132#endif
133 e.addr.proto = p->addr.proto;
134 nest_ent = nla_nest_start(skb,
135 MDBA_MDB_ENTRY_INFO);
136 if (!nest_ent) {
137 nla_nest_cancel(skb, nest2);
138 err = -EMSGSIZE;
139 goto out;
140 }
141 if (nla_put_nohdr(skb, sizeof(e), &e) ||
142 nla_put_u32(skb,
143 MDBA_MDB_EATTR_TIMER,
144 br_timer_value(&p->timer))) {
145 nla_nest_cancel(skb, nest_ent);
146 nla_nest_cancel(skb, nest2);
147 err = -EMSGSIZE;
148 goto out;
149 }
150 nla_nest_end(skb, nest_ent);
151 }
152 nla_nest_end(skb, nest2);
153 skip:
154 idx++;
155 }
156 }
157
158out:
159 cb->args[1] = idx;
160 nla_nest_end(skb, nest);
161 return err;
162}
163
164static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
165{
166 struct net_device *dev;
167 struct net *net = sock_net(skb->sk);
168 struct nlmsghdr *nlh = NULL;
169 int idx = 0, s_idx;
170
171 s_idx = cb->args[0];
172
173 rcu_read_lock();
174
175 /* In theory this could be wrapped to 0... */
176 cb->seq = net->dev_base_seq + br_mdb_rehash_seq;
177
178 for_each_netdev_rcu(net, dev) {
179 if (dev->priv_flags & IFF_EBRIDGE) {
180 struct br_port_msg *bpm;
181
182 if (idx < s_idx)
183 goto skip;
184
185 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
186 cb->nlh->nlmsg_seq, RTM_GETMDB,
187 sizeof(*bpm), NLM_F_MULTI);
188 if (nlh == NULL)
189 break;
190
191 bpm = nlmsg_data(nlh);
192 memset(bpm, 0, sizeof(*bpm));
193 bpm->ifindex = dev->ifindex;
194 if (br_mdb_fill_info(skb, cb, dev) < 0)
195 goto out;
196 if (br_rports_fill_info(skb, cb, dev) < 0)
197 goto out;
198
199 cb->args[1] = 0;
200 nlmsg_end(skb, nlh);
201 skip:
202 idx++;
203 }
204 }
205
206out:
207 if (nlh)
208 nlmsg_end(skb, nlh);
209 rcu_read_unlock();
210 cb->args[0] = idx;
211 return skb->len;
212}
213
214static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
215 struct net_device *dev,
216 struct br_mdb_entry *entry, u32 pid,
217 u32 seq, int type, unsigned int flags)
218{
219 struct nlmsghdr *nlh;
220 struct br_port_msg *bpm;
221 struct nlattr *nest, *nest2;
222
223 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0);
224 if (!nlh)
225 return -EMSGSIZE;
226
227 bpm = nlmsg_data(nlh);
228 memset(bpm, 0, sizeof(*bpm));
229 bpm->family = AF_BRIDGE;
230 bpm->ifindex = dev->ifindex;
231 nest = nla_nest_start(skb, MDBA_MDB);
232 if (nest == NULL)
233 goto cancel;
234 nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
235 if (nest2 == NULL)
236 goto end;
237
238 if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry))
239 goto end;
240
241 nla_nest_end(skb, nest2);
242 nla_nest_end(skb, nest);
243 nlmsg_end(skb, nlh);
244 return 0;
245
246end:
247 nla_nest_end(skb, nest);
248cancel:
249 nlmsg_cancel(skb, nlh);
250 return -EMSGSIZE;
251}
252
253static inline size_t rtnl_mdb_nlmsg_size(void)
254{
255 return NLMSG_ALIGN(sizeof(struct br_port_msg))
256 + nla_total_size(sizeof(struct br_mdb_entry));
257}
258
259struct br_mdb_complete_info {
260 struct net_bridge_port *port;
261 struct br_ip ip;
262};
263
264static void br_mdb_complete(struct net_device *dev, int err, void *priv)
265{
266 struct br_mdb_complete_info *data = priv;
267 struct net_bridge_port_group __rcu **pp;
268 struct net_bridge_port_group *p;
269 struct net_bridge_mdb_htable *mdb;
270 struct net_bridge_mdb_entry *mp;
271 struct net_bridge_port *port = data->port;
272 struct net_bridge *br = port->br;
273
274 if (err)
275 goto err;
276
277 spin_lock_bh(&br->multicast_lock);
278 mdb = mlock_dereference(br->mdb, br);
279 mp = br_mdb_ip_get(mdb, &data->ip);
280 if (!mp)
281 goto out;
282 for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL;
283 pp = &p->next) {
284 if (p->port != port)
285 continue;
286 p->flags |= MDB_PG_FLAGS_OFFLOAD;
287 }
288out:
289 spin_unlock_bh(&br->multicast_lock);
290err:
291 kfree(priv);
292}
293
294static void __br_mdb_notify(struct net_device *dev, struct net_bridge_port *p,
295 struct br_mdb_entry *entry, int type)
296{
297 struct br_mdb_complete_info *complete_info;
298 struct switchdev_obj_port_mdb mdb = {
299 .obj = {
300 .id = SWITCHDEV_OBJ_ID_PORT_MDB,
301 .flags = SWITCHDEV_F_DEFER,
302 },
303 .vid = entry->vid,
304 };
305 struct net_device *port_dev;
306 struct net *net = dev_net(dev);
307 struct sk_buff *skb;
308 int err = -ENOBUFS;
309
310 port_dev = __dev_get_by_index(net, entry->ifindex);
311 if (entry->addr.proto == htons(ETH_P_IP))
312 ip_eth_mc_map(entry->addr.u.ip4, mdb.addr);
313#if IS_ENABLED(CONFIG_IPV6)
314 else
315 ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr);
316#endif
317
318 mdb.obj.orig_dev = port_dev;
319 if (port_dev && type == RTM_NEWMDB) {
320 complete_info = kmalloc(sizeof(*complete_info), GFP_ATOMIC);
321 if (complete_info) {
322 complete_info->port = p;
323 __mdb_entry_to_br_ip(entry, &complete_info->ip);
324 mdb.obj.complete_priv = complete_info;
325 mdb.obj.complete = br_mdb_complete;
326 switchdev_port_obj_add(port_dev, &mdb.obj);
327 }
328 } else if (port_dev && type == RTM_DELMDB) {
329 switchdev_port_obj_del(port_dev, &mdb.obj);
330 }
331
332 skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC);
333 if (!skb)
334 goto errout;
335
336 err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF);
337 if (err < 0) {
338 kfree_skb(skb);
339 goto errout;
340 }
341
342 rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
343 return;
344errout:
345 rtnl_set_sk_err(net, RTNLGRP_MDB, err);
346}
347
348void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
349 struct br_ip *group, int type, u8 flags)
350{
351 struct br_mdb_entry entry;
352
353 memset(&entry, 0, sizeof(entry));
354 entry.ifindex = port->dev->ifindex;
355 entry.addr.proto = group->proto;
356 entry.addr.u.ip4 = group->u.ip4;
357#if IS_ENABLED(CONFIG_IPV6)
358 entry.addr.u.ip6 = group->u.ip6;
359#endif
360 entry.vid = group->vid;
361 __mdb_entry_fill_flags(&entry, flags);
362 __br_mdb_notify(dev, port, &entry, type);
363}
364
365static int nlmsg_populate_rtr_fill(struct sk_buff *skb,
366 struct net_device *dev,
367 int ifindex, u32 pid,
368 u32 seq, int type, unsigned int flags)
369{
370 struct br_port_msg *bpm;
371 struct nlmsghdr *nlh;
372 struct nlattr *nest;
373
374 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI);
375 if (!nlh)
376 return -EMSGSIZE;
377
378 bpm = nlmsg_data(nlh);
379 memset(bpm, 0, sizeof(*bpm));
380 bpm->family = AF_BRIDGE;
381 bpm->ifindex = dev->ifindex;
382 nest = nla_nest_start(skb, MDBA_ROUTER);
383 if (!nest)
384 goto cancel;
385
386 if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex))
387 goto end;
388
389 nla_nest_end(skb, nest);
390 nlmsg_end(skb, nlh);
391 return 0;
392
393end:
394 nla_nest_end(skb, nest);
395cancel:
396 nlmsg_cancel(skb, nlh);
397 return -EMSGSIZE;
398}
399
400static inline size_t rtnl_rtr_nlmsg_size(void)
401{
402 return NLMSG_ALIGN(sizeof(struct br_port_msg))
403 + nla_total_size(sizeof(__u32));
404}
405
406void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
407 int type)
408{
409 struct net *net = dev_net(dev);
410 struct sk_buff *skb;
411 int err = -ENOBUFS;
412 int ifindex;
413
414 ifindex = port ? port->dev->ifindex : 0;
415 skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC);
416 if (!skb)
417 goto errout;
418
419 err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF);
420 if (err < 0) {
421 kfree_skb(skb);
422 goto errout;
423 }
424
425 rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
426 return;
427
428errout:
429 rtnl_set_sk_err(net, RTNLGRP_MDB, err);
430}
431
432static bool is_valid_mdb_entry(struct br_mdb_entry *entry)
433{
434 if (entry->ifindex == 0)
435 return false;
436
437 if (entry->addr.proto == htons(ETH_P_IP)) {
438 if (!ipv4_is_multicast(entry->addr.u.ip4))
439 return false;
440 if (ipv4_is_local_multicast(entry->addr.u.ip4))
441 return false;
442#if IS_ENABLED(CONFIG_IPV6)
443 } else if (entry->addr.proto == htons(ETH_P_IPV6)) {
444 if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6))
445 return false;
446#endif
447 } else
448 return false;
449 if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY)
450 return false;
451 if (entry->vid >= VLAN_VID_MASK)
452 return false;
453
454 return true;
455}
456
457static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh,
458 struct net_device **pdev, struct br_mdb_entry **pentry)
459{
460 struct net *net = sock_net(skb->sk);
461 struct br_mdb_entry *entry;
462 struct br_port_msg *bpm;
463 struct nlattr *tb[MDBA_SET_ENTRY_MAX+1];
464 struct net_device *dev;
465 int err;
466
467 err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, NULL);
468 if (err < 0)
469 return err;
470
471 bpm = nlmsg_data(nlh);
472 if (bpm->ifindex == 0) {
473 pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n");
474 return -EINVAL;
475 }
476
477 dev = __dev_get_by_index(net, bpm->ifindex);
478 if (dev == NULL) {
479 pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n");
480 return -ENODEV;
481 }
482
483 if (!(dev->priv_flags & IFF_EBRIDGE)) {
484 pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n");
485 return -EOPNOTSUPP;
486 }
487
488 *pdev = dev;
489
490 if (!tb[MDBA_SET_ENTRY] ||
491 nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) {
492 pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n");
493 return -EINVAL;
494 }
495
496 entry = nla_data(tb[MDBA_SET_ENTRY]);
497 if (!is_valid_mdb_entry(entry)) {
498 pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n");
499 return -EINVAL;
500 }
501
502 *pentry = entry;
503 return 0;
504}
505
506static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
507 struct br_ip *group, unsigned char state)
508{
509 struct net_bridge_mdb_entry *mp;
510 struct net_bridge_port_group *p;
511 struct net_bridge_port_group __rcu **pp;
512 struct net_bridge_mdb_htable *mdb;
513 unsigned long now = jiffies;
514 int err;
515
516 mdb = mlock_dereference(br->mdb, br);
517 mp = br_mdb_ip_get(mdb, group);
518 if (!mp) {
519 mp = br_multicast_new_group(br, port, group);
520 err = PTR_ERR_OR_ZERO(mp);
521 if (err)
522 return err;
523 }
524
525 for (pp = &mp->ports;
526 (p = mlock_dereference(*pp, br)) != NULL;
527 pp = &p->next) {
528 if (p->port == port)
529 return -EEXIST;
530 if ((unsigned long)p->port < (unsigned long)port)
531 break;
532 }
533
534 p = br_multicast_new_port_group(port, group, *pp, state);
535 if (unlikely(!p))
536 return -ENOMEM;
537 rcu_assign_pointer(*pp, p);
538 if (state == MDB_TEMPORARY)
539 mod_timer(&p->timer, now + br->multicast_membership_interval);
540
541 return 0;
542}
543
544static int __br_mdb_add(struct net *net, struct net_bridge *br,
545 struct br_mdb_entry *entry)
546{
547 struct br_ip ip;
548 struct net_device *dev;
549 struct net_bridge_port *p;
550 int ret;
551
552 if (!netif_running(br->dev) || br->multicast_disabled)
553 return -EINVAL;
554
555 dev = __dev_get_by_index(net, entry->ifindex);
556 if (!dev)
557 return -ENODEV;
558
559 p = br_port_get_rtnl(dev);
560 if (!p || p->br != br || p->state == BR_STATE_DISABLED)
561 return -EINVAL;
562
563 __mdb_entry_to_br_ip(entry, &ip);
564
565 spin_lock_bh(&br->multicast_lock);
566 ret = br_mdb_add_group(br, p, &ip, entry->state);
567 spin_unlock_bh(&br->multicast_lock);
568 return ret;
569}
570
571static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
572{
573 struct net *net = sock_net(skb->sk);
574 struct net_bridge_vlan_group *vg;
575 struct net_device *dev, *pdev;
576 struct br_mdb_entry *entry;
577 struct net_bridge_port *p;
578 struct net_bridge_vlan *v;
579 struct net_bridge *br;
580 int err;
581
582 err = br_mdb_parse(skb, nlh, &dev, &entry);
583 if (err < 0)
584 return err;
585
586 br = netdev_priv(dev);
587
588 /* If vlan filtering is enabled and VLAN is not specified
589 * install mdb entry on all vlans configured on the port.
590 */
591 pdev = __dev_get_by_index(net, entry->ifindex);
592 if (!pdev)
593 return -ENODEV;
594
595 p = br_port_get_rtnl(pdev);
596 if (!p || p->br != br || p->state == BR_STATE_DISABLED)
597 return -EINVAL;
598
599 vg = nbp_vlan_group(p);
600 if (br_vlan_enabled(br) && vg && entry->vid == 0) {
601 list_for_each_entry(v, &vg->vlan_list, vlist) {
602 entry->vid = v->vid;
603 err = __br_mdb_add(net, br, entry);
604 if (err)
605 break;
606 __br_mdb_notify(dev, p, entry, RTM_NEWMDB);
607 }
608 } else {
609 err = __br_mdb_add(net, br, entry);
610 if (!err)
611 __br_mdb_notify(dev, p, entry, RTM_NEWMDB);
612 }
613
614 return err;
615}
616
617static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry)
618{
619 struct net_bridge_mdb_htable *mdb;
620 struct net_bridge_mdb_entry *mp;
621 struct net_bridge_port_group *p;
622 struct net_bridge_port_group __rcu **pp;
623 struct br_ip ip;
624 int err = -EINVAL;
625
626 if (!netif_running(br->dev) || br->multicast_disabled)
627 return -EINVAL;
628
629 __mdb_entry_to_br_ip(entry, &ip);
630
631 spin_lock_bh(&br->multicast_lock);
632 mdb = mlock_dereference(br->mdb, br);
633
634 mp = br_mdb_ip_get(mdb, &ip);
635 if (!mp)
636 goto unlock;
637
638 for (pp = &mp->ports;
639 (p = mlock_dereference(*pp, br)) != NULL;
640 pp = &p->next) {
641 if (!p->port || p->port->dev->ifindex != entry->ifindex)
642 continue;
643
644 if (p->port->state == BR_STATE_DISABLED)
645 goto unlock;
646
647 __mdb_entry_fill_flags(entry, p->flags);
648 rcu_assign_pointer(*pp, p->next);
649 hlist_del_init(&p->mglist);
650 del_timer(&p->timer);
651 call_rcu_bh(&p->rcu, br_multicast_free_pg);
652 err = 0;
653
654 if (!mp->ports && !mp->mglist &&
655 netif_running(br->dev))
656 mod_timer(&mp->timer, jiffies);
657 break;
658 }
659
660unlock:
661 spin_unlock_bh(&br->multicast_lock);
662 return err;
663}
664
665static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
666{
667 struct net *net = sock_net(skb->sk);
668 struct net_bridge_vlan_group *vg;
669 struct net_device *dev, *pdev;
670 struct br_mdb_entry *entry;
671 struct net_bridge_port *p;
672 struct net_bridge_vlan *v;
673 struct net_bridge *br;
674 int err;
675
676 err = br_mdb_parse(skb, nlh, &dev, &entry);
677 if (err < 0)
678 return err;
679
680 br = netdev_priv(dev);
681
682 /* If vlan filtering is enabled and VLAN is not specified
683 * delete mdb entry on all vlans configured on the port.
684 */
685 pdev = __dev_get_by_index(net, entry->ifindex);
686 if (!pdev)
687 return -ENODEV;
688
689 p = br_port_get_rtnl(pdev);
690 if (!p || p->br != br || p->state == BR_STATE_DISABLED)
691 return -EINVAL;
692
693 vg = nbp_vlan_group(p);
694 if (br_vlan_enabled(br) && vg && entry->vid == 0) {
695 list_for_each_entry(v, &vg->vlan_list, vlist) {
696 entry->vid = v->vid;
697 err = __br_mdb_del(br, entry);
698 if (!err)
699 __br_mdb_notify(dev, p, entry, RTM_DELMDB);
700 }
701 } else {
702 err = __br_mdb_del(br, entry);
703 if (!err)
704 __br_mdb_notify(dev, p, entry, RTM_DELMDB);
705 }
706
707 return err;
708}
709
710void br_mdb_init(void)
711{
712 rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, NULL);
713 rtnl_register(PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, NULL);
714 rtnl_register(PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, NULL);
715}
716
717void br_mdb_uninit(void)
718{
719 rtnl_unregister(PF_BRIDGE, RTM_GETMDB);
720 rtnl_unregister(PF_BRIDGE, RTM_NEWMDB);
721 rtnl_unregister(PF_BRIDGE, RTM_DELMDB);
722}