blob: 30e105f57f0d9a59e1ce03de8531b90718ac8e29 [file] [log] [blame]
Cong Wangee07c6e2012-12-07 00:04:48 +00001#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>
Cong Wangcfd56752012-12-11 22:23:08 +00007#include <linux/if_ether.h>
Cong Wangee07c6e2012-12-07 00:04:48 +00008#include <net/ip.h>
9#include <net/netlink.h>
Elad Razf1fecb12016-01-10 21:06:23 +010010#include <net/switchdev.h>
Cong Wangee07c6e2012-12-07 00:04:48 +000011#if IS_ENABLED(CONFIG_IPV6)
12#include <net/ipv6.h>
Linus Lüssing3c3769e2013-09-04 02:13:39 +020013#include <net/addrconf.h>
Cong Wangee07c6e2012-12-07 00:04:48 +000014#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;
Cong Wangee07c6e2012-12-07 00:04:48 +000023 struct nlattr *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
Sasha Levinb67bfe02013-02-27 17:06:00 -080032 hlist_for_each_entry_rcu(p, &br->router_list, rlist) {
Cong Wangee07c6e2012-12-07 00:04:48 +000033 if (p && nla_put_u32(skb, MDBA_ROUTER_PORT, p->dev->ifindex))
34 goto fail;
35 }
36
37 nla_nest_end(skb, nest);
38 return 0;
39fail:
40 nla_nest_cancel(skb, nest);
41 return -EMSGSIZE;
42}
43
44static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
45 struct net_device *dev)
46{
47 struct net_bridge *br = netdev_priv(dev);
48 struct net_bridge_mdb_htable *mdb;
49 struct nlattr *nest, *nest2;
50 int i, err = 0;
51 int idx = 0, s_idx = cb->args[1];
52
53 if (br->multicast_disabled)
54 return 0;
55
56 mdb = rcu_dereference(br->mdb);
57 if (!mdb)
58 return 0;
59
60 nest = nla_nest_start(skb, MDBA_MDB);
61 if (nest == NULL)
62 return -EMSGSIZE;
63
64 for (i = 0; i < mdb->max; i++) {
Cong Wangee07c6e2012-12-07 00:04:48 +000065 struct net_bridge_mdb_entry *mp;
stephen hemminger762a3d82013-08-04 17:19:38 -070066 struct net_bridge_port_group *p;
67 struct net_bridge_port_group __rcu **pp;
Cong Wangee07c6e2012-12-07 00:04:48 +000068 struct net_bridge_port *port;
69
Sasha Levinb67bfe02013-02-27 17:06:00 -080070 hlist_for_each_entry_rcu(mp, &mdb->mhash[i], hlist[mdb->ver]) {
Cong Wangee07c6e2012-12-07 00:04:48 +000071 if (idx < s_idx)
72 goto skip;
73
74 nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
75 if (nest2 == NULL) {
76 err = -EMSGSIZE;
77 goto out;
78 }
79
80 for (pp = &mp->ports;
81 (p = rcu_dereference(*pp)) != NULL;
82 pp = &p->next) {
83 port = p->port;
84 if (port) {
85 struct br_mdb_entry e;
Mathias Krausec085c492013-03-09 05:52:19 +000086 memset(&e, 0, sizeof(e));
Cong Wangee07c6e2012-12-07 00:04:48 +000087 e.ifindex = port->dev->ifindex;
Amerigo Wangccb1c312012-12-14 22:09:51 +000088 e.state = p->state;
Nikolay Aleksandrov74fe61f2015-07-10 08:02:08 -070089 e.vid = p->addr.vid;
Vlad Yasevich09d7cf72012-12-18 11:54:08 +000090 if (p->addr.proto == htons(ETH_P_IP))
91 e.addr.u.ip4 = p->addr.u.ip4;
Cong Wangee07c6e2012-12-07 00:04:48 +000092#if IS_ENABLED(CONFIG_IPV6)
Vlad Yasevich09d7cf72012-12-18 11:54:08 +000093 if (p->addr.proto == htons(ETH_P_IPV6))
94 e.addr.u.ip6 = p->addr.u.ip6;
Cong Wangee07c6e2012-12-07 00:04:48 +000095#endif
96 e.addr.proto = p->addr.proto;
97 if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(e), &e)) {
98 nla_nest_cancel(skb, nest2);
99 err = -EMSGSIZE;
100 goto out;
101 }
102 }
103 }
104 nla_nest_end(skb, nest2);
105 skip:
106 idx++;
107 }
108 }
109
110out:
111 cb->args[1] = idx;
112 nla_nest_end(skb, nest);
113 return err;
114}
115
116static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
117{
118 struct net_device *dev;
119 struct net *net = sock_net(skb->sk);
120 struct nlmsghdr *nlh = NULL;
121 int idx = 0, s_idx;
122
123 s_idx = cb->args[0];
124
125 rcu_read_lock();
126
Cong Wang2ce297f2012-12-10 02:15:35 +0000127 /* In theory this could be wrapped to 0... */
128 cb->seq = net->dev_base_seq + br_mdb_rehash_seq;
Cong Wangee07c6e2012-12-07 00:04:48 +0000129
130 for_each_netdev_rcu(net, dev) {
131 if (dev->priv_flags & IFF_EBRIDGE) {
132 struct br_port_msg *bpm;
133
134 if (idx < s_idx)
135 goto skip;
136
137 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
138 cb->nlh->nlmsg_seq, RTM_GETMDB,
139 sizeof(*bpm), NLM_F_MULTI);
140 if (nlh == NULL)
141 break;
142
143 bpm = nlmsg_data(nlh);
Mathias Krausec085c492013-03-09 05:52:19 +0000144 memset(bpm, 0, sizeof(*bpm));
Cong Wangee07c6e2012-12-07 00:04:48 +0000145 bpm->ifindex = dev->ifindex;
146 if (br_mdb_fill_info(skb, cb, dev) < 0)
147 goto out;
148 if (br_rports_fill_info(skb, cb, dev) < 0)
149 goto out;
150
151 cb->args[1] = 0;
152 nlmsg_end(skb, nlh);
153 skip:
154 idx++;
155 }
156 }
157
158out:
159 if (nlh)
160 nlmsg_end(skb, nlh);
161 rcu_read_unlock();
162 cb->args[0] = idx;
163 return skb->len;
164}
165
Cong Wang37a393b2012-12-11 22:23:07 +0000166static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
167 struct net_device *dev,
168 struct br_mdb_entry *entry, u32 pid,
169 u32 seq, int type, unsigned int flags)
170{
171 struct nlmsghdr *nlh;
172 struct br_port_msg *bpm;
173 struct nlattr *nest, *nest2;
174
Nicolas Dichtel82199672015-04-28 18:33:48 +0200175 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0);
Cong Wang37a393b2012-12-11 22:23:07 +0000176 if (!nlh)
177 return -EMSGSIZE;
178
179 bpm = nlmsg_data(nlh);
Mathias Krausec085c492013-03-09 05:52:19 +0000180 memset(bpm, 0, sizeof(*bpm));
Cong Wang37a393b2012-12-11 22:23:07 +0000181 bpm->family = AF_BRIDGE;
182 bpm->ifindex = dev->ifindex;
183 nest = nla_nest_start(skb, MDBA_MDB);
184 if (nest == NULL)
185 goto cancel;
186 nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
187 if (nest2 == NULL)
188 goto end;
189
190 if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry))
191 goto end;
192
193 nla_nest_end(skb, nest2);
194 nla_nest_end(skb, nest);
Johannes Berg053c0952015-01-16 22:09:00 +0100195 nlmsg_end(skb, nlh);
196 return 0;
Cong Wang37a393b2012-12-11 22:23:07 +0000197
198end:
199 nla_nest_end(skb, nest);
200cancel:
201 nlmsg_cancel(skb, nlh);
202 return -EMSGSIZE;
203}
204
205static inline size_t rtnl_mdb_nlmsg_size(void)
206{
207 return NLMSG_ALIGN(sizeof(struct br_port_msg))
208 + nla_total_size(sizeof(struct br_mdb_entry));
209}
210
211static void __br_mdb_notify(struct net_device *dev, struct br_mdb_entry *entry,
212 int type)
213{
Elad Razf1fecb12016-01-10 21:06:23 +0100214 struct switchdev_obj_port_mdb mdb = {
215 .obj = {
216 .id = SWITCHDEV_OBJ_ID_PORT_MDB,
217 .flags = SWITCHDEV_F_DEFER,
218 },
219 .vid = entry->vid,
220 };
221 struct net_device *port_dev;
Cong Wang37a393b2012-12-11 22:23:07 +0000222 struct net *net = dev_net(dev);
223 struct sk_buff *skb;
224 int err = -ENOBUFS;
225
Elad Razf1fecb12016-01-10 21:06:23 +0100226 port_dev = __dev_get_by_index(net, entry->ifindex);
227 if (entry->addr.proto == htons(ETH_P_IP))
228 ip_eth_mc_map(entry->addr.u.ip4, mdb.addr);
229#if IS_ENABLED(CONFIG_IPV6)
230 else
231 ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr);
232#endif
233
234 mdb.obj.orig_dev = port_dev;
235 if (port_dev && type == RTM_NEWMDB)
236 switchdev_port_obj_add(port_dev, &mdb.obj);
237 else if (port_dev && type == RTM_DELMDB)
238 switchdev_port_obj_del(port_dev, &mdb.obj);
239
Cong Wang37a393b2012-12-11 22:23:07 +0000240 skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC);
241 if (!skb)
242 goto errout;
243
244 err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF);
245 if (err < 0) {
246 kfree_skb(skb);
247 goto errout;
248 }
249
250 rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
251 return;
252errout:
253 rtnl_set_sk_err(net, RTNLGRP_MDB, err);
254}
255
256void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
Nikolay Aleksandrov09cf0212015-07-09 03:11:10 -0700257 struct br_ip *group, int type, u8 state)
Cong Wang37a393b2012-12-11 22:23:07 +0000258{
259 struct br_mdb_entry entry;
260
Mathias Krausec085c492013-03-09 05:52:19 +0000261 memset(&entry, 0, sizeof(entry));
Cong Wang37a393b2012-12-11 22:23:07 +0000262 entry.ifindex = port->dev->ifindex;
263 entry.addr.proto = group->proto;
264 entry.addr.u.ip4 = group->u.ip4;
265#if IS_ENABLED(CONFIG_IPV6)
266 entry.addr.u.ip6 = group->u.ip6;
267#endif
Nikolay Aleksandrov09cf0212015-07-09 03:11:10 -0700268 entry.state = state;
Nikolay Aleksandrov74fe61f2015-07-10 08:02:08 -0700269 entry.vid = group->vid;
Cong Wang37a393b2012-12-11 22:23:07 +0000270 __br_mdb_notify(dev, &entry, type);
271}
272
Satish Ashok949f1e32015-07-23 05:00:53 -0700273static int nlmsg_populate_rtr_fill(struct sk_buff *skb,
274 struct net_device *dev,
275 int ifindex, u32 pid,
276 u32 seq, int type, unsigned int flags)
277{
278 struct br_port_msg *bpm;
279 struct nlmsghdr *nlh;
280 struct nlattr *nest;
281
282 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI);
283 if (!nlh)
284 return -EMSGSIZE;
285
286 bpm = nlmsg_data(nlh);
287 memset(bpm, 0, sizeof(*bpm));
288 bpm->family = AF_BRIDGE;
289 bpm->ifindex = dev->ifindex;
290 nest = nla_nest_start(skb, MDBA_ROUTER);
291 if (!nest)
292 goto cancel;
293
294 if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex))
295 goto end;
296
297 nla_nest_end(skb, nest);
298 nlmsg_end(skb, nlh);
299 return 0;
300
301end:
302 nla_nest_end(skb, nest);
303cancel:
304 nlmsg_cancel(skb, nlh);
305 return -EMSGSIZE;
306}
307
308static inline size_t rtnl_rtr_nlmsg_size(void)
309{
310 return NLMSG_ALIGN(sizeof(struct br_port_msg))
311 + nla_total_size(sizeof(__u32));
312}
313
314void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
315 int type)
316{
317 struct net *net = dev_net(dev);
318 struct sk_buff *skb;
319 int err = -ENOBUFS;
320 int ifindex;
321
322 ifindex = port ? port->dev->ifindex : 0;
323 skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC);
324 if (!skb)
325 goto errout;
326
327 err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF);
328 if (err < 0) {
329 kfree_skb(skb);
330 goto errout;
331 }
332
333 rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
334 return;
335
336errout:
337 rtnl_set_sk_err(net, RTNLGRP_MDB, err);
338}
339
Cong Wangcfd56752012-12-11 22:23:08 +0000340static bool is_valid_mdb_entry(struct br_mdb_entry *entry)
341{
342 if (entry->ifindex == 0)
343 return false;
344
345 if (entry->addr.proto == htons(ETH_P_IP)) {
346 if (!ipv4_is_multicast(entry->addr.u.ip4))
347 return false;
348 if (ipv4_is_local_multicast(entry->addr.u.ip4))
349 return false;
350#if IS_ENABLED(CONFIG_IPV6)
351 } else if (entry->addr.proto == htons(ETH_P_IPV6)) {
Linus Lüssing3c3769e2013-09-04 02:13:39 +0200352 if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6))
Cong Wangcfd56752012-12-11 22:23:08 +0000353 return false;
354#endif
355 } else
356 return false;
Amerigo Wangccb1c312012-12-14 22:09:51 +0000357 if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY)
358 return false;
Nikolay Aleksandrov74fe61f2015-07-10 08:02:08 -0700359 if (entry->vid >= VLAN_VID_MASK)
360 return false;
Cong Wangcfd56752012-12-11 22:23:08 +0000361
362 return true;
363}
364
365static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh,
366 struct net_device **pdev, struct br_mdb_entry **pentry)
367{
368 struct net *net = sock_net(skb->sk);
369 struct br_mdb_entry *entry;
370 struct br_port_msg *bpm;
371 struct nlattr *tb[MDBA_SET_ENTRY_MAX+1];
372 struct net_device *dev;
373 int err;
374
Nicolas Dichtel12d87252015-01-15 16:29:12 +0100375 err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, NULL);
Cong Wangcfd56752012-12-11 22:23:08 +0000376 if (err < 0)
377 return err;
378
379 bpm = nlmsg_data(nlh);
380 if (bpm->ifindex == 0) {
381 pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n");
382 return -EINVAL;
383 }
384
385 dev = __dev_get_by_index(net, bpm->ifindex);
386 if (dev == NULL) {
387 pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n");
388 return -ENODEV;
389 }
390
391 if (!(dev->priv_flags & IFF_EBRIDGE)) {
392 pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n");
393 return -EOPNOTSUPP;
394 }
395
396 *pdev = dev;
397
398 if (!tb[MDBA_SET_ENTRY] ||
399 nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) {
400 pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n");
401 return -EINVAL;
402 }
403
404 entry = nla_data(tb[MDBA_SET_ENTRY]);
405 if (!is_valid_mdb_entry(entry)) {
406 pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n");
407 return -EINVAL;
408 }
409
410 *pentry = entry;
411 return 0;
412}
413
414static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
Amerigo Wangccb1c312012-12-14 22:09:51 +0000415 struct br_ip *group, unsigned char state)
Cong Wangcfd56752012-12-11 22:23:08 +0000416{
417 struct net_bridge_mdb_entry *mp;
418 struct net_bridge_port_group *p;
419 struct net_bridge_port_group __rcu **pp;
420 struct net_bridge_mdb_htable *mdb;
Satish Ashokf7e29652015-07-06 05:53:35 -0700421 unsigned long now = jiffies;
Cong Wangcfd56752012-12-11 22:23:08 +0000422 int err;
423
424 mdb = mlock_dereference(br->mdb, br);
425 mp = br_mdb_ip_get(mdb, group);
426 if (!mp) {
427 mp = br_multicast_new_group(br, port, group);
428 err = PTR_ERR(mp);
429 if (IS_ERR(mp))
430 return err;
431 }
432
433 for (pp = &mp->ports;
434 (p = mlock_dereference(*pp, br)) != NULL;
435 pp = &p->next) {
436 if (p->port == port)
437 return -EEXIST;
438 if ((unsigned long)p->port < (unsigned long)port)
439 break;
440 }
441
Amerigo Wangccb1c312012-12-14 22:09:51 +0000442 p = br_multicast_new_port_group(port, group, *pp, state);
Cong Wangcfd56752012-12-11 22:23:08 +0000443 if (unlikely(!p))
444 return -ENOMEM;
445 rcu_assign_pointer(*pp, p);
Satish Ashokf7e29652015-07-06 05:53:35 -0700446 if (state == MDB_TEMPORARY)
447 mod_timer(&p->timer, now + br->multicast_membership_interval);
Cong Wangcfd56752012-12-11 22:23:08 +0000448
Cong Wangcfd56752012-12-11 22:23:08 +0000449 return 0;
450}
451
452static int __br_mdb_add(struct net *net, struct net_bridge *br,
453 struct br_mdb_entry *entry)
454{
455 struct br_ip ip;
456 struct net_device *dev;
457 struct net_bridge_port *p;
458 int ret;
459
460 if (!netif_running(br->dev) || br->multicast_disabled)
461 return -EINVAL;
462
463 dev = __dev_get_by_index(net, entry->ifindex);
464 if (!dev)
465 return -ENODEV;
466
467 p = br_port_get_rtnl(dev);
468 if (!p || p->br != br || p->state == BR_STATE_DISABLED)
469 return -EINVAL;
470
Nikolay Aleksandrovf1158b72015-07-07 15:55:56 +0200471 memset(&ip, 0, sizeof(ip));
Nikolay Aleksandrov74fe61f2015-07-10 08:02:08 -0700472 ip.vid = entry->vid;
Cong Wangcfd56752012-12-11 22:23:08 +0000473 ip.proto = entry->addr.proto;
474 if (ip.proto == htons(ETH_P_IP))
475 ip.u.ip4 = entry->addr.u.ip4;
476#if IS_ENABLED(CONFIG_IPV6)
477 else
478 ip.u.ip6 = entry->addr.u.ip6;
479#endif
480
481 spin_lock_bh(&br->multicast_lock);
Amerigo Wangccb1c312012-12-14 22:09:51 +0000482 ret = br_mdb_add_group(br, p, &ip, entry->state);
Cong Wangcfd56752012-12-11 22:23:08 +0000483 spin_unlock_bh(&br->multicast_lock);
484 return ret;
485}
486
Thomas Graf661d2962013-03-21 07:45:29 +0000487static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
Cong Wangcfd56752012-12-11 22:23:08 +0000488{
489 struct net *net = sock_net(skb->sk);
Nikolay Aleksandrov2594e902015-09-25 19:00:11 +0200490 struct net_bridge_vlan_group *vg;
Satish Ashoke44deb22015-08-03 13:29:16 +0200491 struct net_device *dev, *pdev;
Cong Wangcfd56752012-12-11 22:23:08 +0000492 struct br_mdb_entry *entry;
Satish Ashoke44deb22015-08-03 13:29:16 +0200493 struct net_bridge_port *p;
Nikolay Aleksandrov2594e902015-09-25 19:00:11 +0200494 struct net_bridge_vlan *v;
Cong Wangcfd56752012-12-11 22:23:08 +0000495 struct net_bridge *br;
496 int err;
497
498 err = br_mdb_parse(skb, nlh, &dev, &entry);
499 if (err < 0)
500 return err;
501
502 br = netdev_priv(dev);
503
Satish Ashoke44deb22015-08-03 13:29:16 +0200504 /* If vlan filtering is enabled and VLAN is not specified
505 * install mdb entry on all vlans configured on the port.
506 */
507 pdev = __dev_get_by_index(net, entry->ifindex);
508 if (!pdev)
509 return -ENODEV;
510
511 p = br_port_get_rtnl(pdev);
512 if (!p || p->br != br || p->state == BR_STATE_DISABLED)
513 return -EINVAL;
514
Nikolay Aleksandrov2594e902015-09-25 19:00:11 +0200515 vg = nbp_vlan_group(p);
516 if (br_vlan_enabled(br) && vg && entry->vid == 0) {
517 list_for_each_entry(v, &vg->vlan_list, vlist) {
518 entry->vid = v->vid;
Satish Ashoke44deb22015-08-03 13:29:16 +0200519 err = __br_mdb_add(net, br, entry);
520 if (err)
521 break;
522 __br_mdb_notify(dev, entry, RTM_NEWMDB);
523 }
524 } else {
525 err = __br_mdb_add(net, br, entry);
526 if (!err)
527 __br_mdb_notify(dev, entry, RTM_NEWMDB);
528 }
529
Cong Wangcfd56752012-12-11 22:23:08 +0000530 return err;
531}
532
533static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry)
534{
535 struct net_bridge_mdb_htable *mdb;
536 struct net_bridge_mdb_entry *mp;
537 struct net_bridge_port_group *p;
538 struct net_bridge_port_group __rcu **pp;
539 struct br_ip ip;
540 int err = -EINVAL;
541
542 if (!netif_running(br->dev) || br->multicast_disabled)
543 return -EINVAL;
544
Nikolay Aleksandrovf1158b72015-07-07 15:55:56 +0200545 memset(&ip, 0, sizeof(ip));
Nikolay Aleksandrov74fe61f2015-07-10 08:02:08 -0700546 ip.vid = entry->vid;
Cong Wangcfd56752012-12-11 22:23:08 +0000547 ip.proto = entry->addr.proto;
Satish Ashok51ed7f3e2015-07-09 04:12:45 -0700548 if (ip.proto == htons(ETH_P_IP))
Cong Wangcfd56752012-12-11 22:23:08 +0000549 ip.u.ip4 = entry->addr.u.ip4;
550#if IS_ENABLED(CONFIG_IPV6)
Satish Ashok51ed7f3e2015-07-09 04:12:45 -0700551 else
Cong Wangcfd56752012-12-11 22:23:08 +0000552 ip.u.ip6 = entry->addr.u.ip6;
553#endif
554
555 spin_lock_bh(&br->multicast_lock);
556 mdb = mlock_dereference(br->mdb, br);
557
558 mp = br_mdb_ip_get(mdb, &ip);
559 if (!mp)
560 goto unlock;
561
562 for (pp = &mp->ports;
563 (p = mlock_dereference(*pp, br)) != NULL;
564 pp = &p->next) {
565 if (!p->port || p->port->dev->ifindex != entry->ifindex)
566 continue;
567
568 if (p->port->state == BR_STATE_DISABLED)
569 goto unlock;
570
Nikolay Aleksandrov7ae90a42015-07-28 13:10:44 +0200571 entry->state = p->state;
Cong Wangcfd56752012-12-11 22:23:08 +0000572 rcu_assign_pointer(*pp, p->next);
573 hlist_del_init(&p->mglist);
574 del_timer(&p->timer);
575 call_rcu_bh(&p->rcu, br_multicast_free_pg);
576 err = 0;
577
Linus Lüssing454594f2013-10-20 00:58:57 +0200578 if (!mp->ports && !mp->mglist &&
Cong Wangcfd56752012-12-11 22:23:08 +0000579 netif_running(br->dev))
580 mod_timer(&mp->timer, jiffies);
581 break;
582 }
583
584unlock:
585 spin_unlock_bh(&br->multicast_lock);
586 return err;
587}
588
Thomas Graf661d2962013-03-21 07:45:29 +0000589static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
Cong Wangcfd56752012-12-11 22:23:08 +0000590{
Satish Ashoke44deb22015-08-03 13:29:16 +0200591 struct net *net = sock_net(skb->sk);
Nikolay Aleksandrov2594e902015-09-25 19:00:11 +0200592 struct net_bridge_vlan_group *vg;
Satish Ashoke44deb22015-08-03 13:29:16 +0200593 struct net_device *dev, *pdev;
Cong Wangcfd56752012-12-11 22:23:08 +0000594 struct br_mdb_entry *entry;
Satish Ashoke44deb22015-08-03 13:29:16 +0200595 struct net_bridge_port *p;
Nikolay Aleksandrov2594e902015-09-25 19:00:11 +0200596 struct net_bridge_vlan *v;
Cong Wangcfd56752012-12-11 22:23:08 +0000597 struct net_bridge *br;
598 int err;
599
600 err = br_mdb_parse(skb, nlh, &dev, &entry);
601 if (err < 0)
602 return err;
603
604 br = netdev_priv(dev);
605
Satish Ashoke44deb22015-08-03 13:29:16 +0200606 /* If vlan filtering is enabled and VLAN is not specified
607 * delete mdb entry on all vlans configured on the port.
608 */
609 pdev = __dev_get_by_index(net, entry->ifindex);
610 if (!pdev)
611 return -ENODEV;
612
613 p = br_port_get_rtnl(pdev);
614 if (!p || p->br != br || p->state == BR_STATE_DISABLED)
615 return -EINVAL;
616
Nikolay Aleksandrov2594e902015-09-25 19:00:11 +0200617 vg = nbp_vlan_group(p);
618 if (br_vlan_enabled(br) && vg && entry->vid == 0) {
619 list_for_each_entry(v, &vg->vlan_list, vlist) {
620 entry->vid = v->vid;
Satish Ashoke44deb22015-08-03 13:29:16 +0200621 err = __br_mdb_del(br, entry);
622 if (!err)
623 __br_mdb_notify(dev, entry, RTM_DELMDB);
624 }
625 } else {
626 err = __br_mdb_del(br, entry);
627 if (!err)
628 __br_mdb_notify(dev, entry, RTM_DELMDB);
629 }
630
Cong Wangcfd56752012-12-11 22:23:08 +0000631 return err;
632}
633
Cong Wangee07c6e2012-12-07 00:04:48 +0000634void br_mdb_init(void)
635{
636 rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, NULL);
Cong Wangcfd56752012-12-11 22:23:08 +0000637 rtnl_register(PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, NULL);
638 rtnl_register(PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, NULL);
Cong Wangee07c6e2012-12-07 00:04:48 +0000639}
Vlad Yasevich63233152012-12-19 09:13:48 +0000640
641void br_mdb_uninit(void)
642{
643 rtnl_unregister(PF_BRIDGE, RTM_GETMDB);
644 rtnl_unregister(PF_BRIDGE, RTM_NEWMDB);
645 rtnl_unregister(PF_BRIDGE, RTM_DELMDB);
646}