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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
Elad Raz9d06b6d2016-02-03 09:57:05 +010044static void __mdb_entry_fill_flags(struct br_mdb_entry *e, unsigned char flags)
45{
46 e->state = flags & MDB_PG_FLAGS_PERMANENT;
47 e->flags = 0;
48 if (flags & MDB_PG_FLAGS_OFFLOAD)
49 e->flags |= MDB_FLAGS_OFFLOAD;
50}
51
Cong Wangee07c6e2012-12-07 00:04:48 +000052static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
53 struct net_device *dev)
54{
55 struct net_bridge *br = netdev_priv(dev);
56 struct net_bridge_mdb_htable *mdb;
57 struct nlattr *nest, *nest2;
58 int i, err = 0;
59 int idx = 0, s_idx = cb->args[1];
60
61 if (br->multicast_disabled)
62 return 0;
63
64 mdb = rcu_dereference(br->mdb);
65 if (!mdb)
66 return 0;
67
68 nest = nla_nest_start(skb, MDBA_MDB);
69 if (nest == NULL)
70 return -EMSGSIZE;
71
72 for (i = 0; i < mdb->max; i++) {
Cong Wangee07c6e2012-12-07 00:04:48 +000073 struct net_bridge_mdb_entry *mp;
stephen hemminger762a3d82013-08-04 17:19:38 -070074 struct net_bridge_port_group *p;
75 struct net_bridge_port_group __rcu **pp;
Cong Wangee07c6e2012-12-07 00:04:48 +000076 struct net_bridge_port *port;
77
Sasha Levinb67bfe02013-02-27 17:06:00 -080078 hlist_for_each_entry_rcu(mp, &mdb->mhash[i], hlist[mdb->ver]) {
Cong Wangee07c6e2012-12-07 00:04:48 +000079 if (idx < s_idx)
80 goto skip;
81
82 nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
83 if (nest2 == NULL) {
84 err = -EMSGSIZE;
85 goto out;
86 }
87
88 for (pp = &mp->ports;
89 (p = rcu_dereference(*pp)) != NULL;
90 pp = &p->next) {
Nikolay Aleksandrov21257152016-02-16 12:46:54 +010091 struct nlattr *nest_ent;
Nikolay Aleksandrov76cc1732016-02-16 12:46:53 +010092 struct br_mdb_entry e;
93
Cong Wangee07c6e2012-12-07 00:04:48 +000094 port = p->port;
Nikolay Aleksandrov76cc1732016-02-16 12:46:53 +010095 if (!port)
96 continue;
Nikolay Aleksandrov21257152016-02-16 12:46:54 +010097
Nikolay Aleksandrov76cc1732016-02-16 12:46:53 +010098 memset(&e, 0, sizeof(e));
99 e.ifindex = port->dev->ifindex;
100 e.vid = p->addr.vid;
101 __mdb_entry_fill_flags(&e, p->flags);
102 if (p->addr.proto == htons(ETH_P_IP))
103 e.addr.u.ip4 = p->addr.u.ip4;
Cong Wangee07c6e2012-12-07 00:04:48 +0000104#if IS_ENABLED(CONFIG_IPV6)
Nikolay Aleksandrov76cc1732016-02-16 12:46:53 +0100105 if (p->addr.proto == htons(ETH_P_IPV6))
106 e.addr.u.ip6 = p->addr.u.ip6;
Cong Wangee07c6e2012-12-07 00:04:48 +0000107#endif
Nikolay Aleksandrov76cc1732016-02-16 12:46:53 +0100108 e.addr.proto = p->addr.proto;
Nikolay Aleksandrov21257152016-02-16 12:46:54 +0100109 nest_ent = nla_nest_start(skb,
110 MDBA_MDB_ENTRY_INFO);
111 if (!nest_ent) {
Nikolay Aleksandrov76cc1732016-02-16 12:46:53 +0100112 nla_nest_cancel(skb, nest2);
113 err = -EMSGSIZE;
114 goto out;
Cong Wangee07c6e2012-12-07 00:04:48 +0000115 }
Nikolay Aleksandrov21257152016-02-16 12:46:54 +0100116 if (nla_put_nohdr(skb, sizeof(e), &e) ||
117 nla_put_u32(skb,
118 MDBA_MDB_EATTR_TIMER,
119 br_timer_value(&p->timer))) {
120 nla_nest_cancel(skb, nest_ent);
121 nla_nest_cancel(skb, nest2);
122 err = -EMSGSIZE;
123 goto out;
124 }
125 nla_nest_end(skb, nest_ent);
Cong Wangee07c6e2012-12-07 00:04:48 +0000126 }
127 nla_nest_end(skb, nest2);
128 skip:
129 idx++;
130 }
131 }
132
133out:
134 cb->args[1] = idx;
135 nla_nest_end(skb, nest);
136 return err;
137}
138
139static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
140{
141 struct net_device *dev;
142 struct net *net = sock_net(skb->sk);
143 struct nlmsghdr *nlh = NULL;
144 int idx = 0, s_idx;
145
146 s_idx = cb->args[0];
147
148 rcu_read_lock();
149
Cong Wang2ce297f2012-12-10 02:15:35 +0000150 /* In theory this could be wrapped to 0... */
151 cb->seq = net->dev_base_seq + br_mdb_rehash_seq;
Cong Wangee07c6e2012-12-07 00:04:48 +0000152
153 for_each_netdev_rcu(net, dev) {
154 if (dev->priv_flags & IFF_EBRIDGE) {
155 struct br_port_msg *bpm;
156
157 if (idx < s_idx)
158 goto skip;
159
160 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
161 cb->nlh->nlmsg_seq, RTM_GETMDB,
162 sizeof(*bpm), NLM_F_MULTI);
163 if (nlh == NULL)
164 break;
165
166 bpm = nlmsg_data(nlh);
Mathias Krausec085c492013-03-09 05:52:19 +0000167 memset(bpm, 0, sizeof(*bpm));
Cong Wangee07c6e2012-12-07 00:04:48 +0000168 bpm->ifindex = dev->ifindex;
169 if (br_mdb_fill_info(skb, cb, dev) < 0)
170 goto out;
171 if (br_rports_fill_info(skb, cb, dev) < 0)
172 goto out;
173
174 cb->args[1] = 0;
175 nlmsg_end(skb, nlh);
176 skip:
177 idx++;
178 }
179 }
180
181out:
182 if (nlh)
183 nlmsg_end(skb, nlh);
184 rcu_read_unlock();
185 cb->args[0] = idx;
186 return skb->len;
187}
188
Cong Wang37a393b2012-12-11 22:23:07 +0000189static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
190 struct net_device *dev,
191 struct br_mdb_entry *entry, u32 pid,
192 u32 seq, int type, unsigned int flags)
193{
194 struct nlmsghdr *nlh;
195 struct br_port_msg *bpm;
196 struct nlattr *nest, *nest2;
197
Nicolas Dichtel82199672015-04-28 18:33:48 +0200198 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0);
Cong Wang37a393b2012-12-11 22:23:07 +0000199 if (!nlh)
200 return -EMSGSIZE;
201
202 bpm = nlmsg_data(nlh);
Mathias Krausec085c492013-03-09 05:52:19 +0000203 memset(bpm, 0, sizeof(*bpm));
Cong Wang37a393b2012-12-11 22:23:07 +0000204 bpm->family = AF_BRIDGE;
205 bpm->ifindex = dev->ifindex;
206 nest = nla_nest_start(skb, MDBA_MDB);
207 if (nest == NULL)
208 goto cancel;
209 nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
210 if (nest2 == NULL)
211 goto end;
212
213 if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry))
214 goto end;
215
216 nla_nest_end(skb, nest2);
217 nla_nest_end(skb, nest);
Johannes Berg053c0952015-01-16 22:09:00 +0100218 nlmsg_end(skb, nlh);
219 return 0;
Cong Wang37a393b2012-12-11 22:23:07 +0000220
221end:
222 nla_nest_end(skb, nest);
223cancel:
224 nlmsg_cancel(skb, nlh);
225 return -EMSGSIZE;
226}
227
228static inline size_t rtnl_mdb_nlmsg_size(void)
229{
230 return NLMSG_ALIGN(sizeof(struct br_port_msg))
231 + nla_total_size(sizeof(struct br_mdb_entry));
232}
233
234static void __br_mdb_notify(struct net_device *dev, struct br_mdb_entry *entry,
Elad Raz9e8430f2016-02-03 09:57:06 +0100235 int type, struct net_bridge_port_group *pg)
Cong Wang37a393b2012-12-11 22:23:07 +0000236{
Elad Razf1fecb12016-01-10 21:06:23 +0100237 struct switchdev_obj_port_mdb mdb = {
238 .obj = {
239 .id = SWITCHDEV_OBJ_ID_PORT_MDB,
240 .flags = SWITCHDEV_F_DEFER,
241 },
242 .vid = entry->vid,
243 };
244 struct net_device *port_dev;
Cong Wang37a393b2012-12-11 22:23:07 +0000245 struct net *net = dev_net(dev);
246 struct sk_buff *skb;
247 int err = -ENOBUFS;
248
Elad Razf1fecb12016-01-10 21:06:23 +0100249 port_dev = __dev_get_by_index(net, entry->ifindex);
250 if (entry->addr.proto == htons(ETH_P_IP))
251 ip_eth_mc_map(entry->addr.u.ip4, mdb.addr);
252#if IS_ENABLED(CONFIG_IPV6)
253 else
254 ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr);
255#endif
256
257 mdb.obj.orig_dev = port_dev;
Elad Raz9e8430f2016-02-03 09:57:06 +0100258 if (port_dev && type == RTM_NEWMDB) {
259 err = switchdev_port_obj_add(port_dev, &mdb.obj);
260 if (!err && pg)
261 pg->flags |= MDB_PG_FLAGS_OFFLOAD;
262 } else if (port_dev && type == RTM_DELMDB) {
Elad Razf1fecb12016-01-10 21:06:23 +0100263 switchdev_port_obj_del(port_dev, &mdb.obj);
Elad Raz9e8430f2016-02-03 09:57:06 +0100264 }
Elad Razf1fecb12016-01-10 21:06:23 +0100265
Cong Wang37a393b2012-12-11 22:23:07 +0000266 skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC);
267 if (!skb)
268 goto errout;
269
270 err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF);
271 if (err < 0) {
272 kfree_skb(skb);
273 goto errout;
274 }
275
276 rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
277 return;
278errout:
279 rtnl_set_sk_err(net, RTNLGRP_MDB, err);
280}
281
Elad Raz9e8430f2016-02-03 09:57:06 +0100282void br_mdb_notify(struct net_device *dev, struct net_bridge_port_group *pg,
283 int type)
Cong Wang37a393b2012-12-11 22:23:07 +0000284{
285 struct br_mdb_entry entry;
286
Mathias Krausec085c492013-03-09 05:52:19 +0000287 memset(&entry, 0, sizeof(entry));
Elad Raz9e8430f2016-02-03 09:57:06 +0100288 entry.ifindex = pg->port->dev->ifindex;
289 entry.addr.proto = pg->addr.proto;
290 entry.addr.u.ip4 = pg->addr.u.ip4;
Cong Wang37a393b2012-12-11 22:23:07 +0000291#if IS_ENABLED(CONFIG_IPV6)
Elad Raz9e8430f2016-02-03 09:57:06 +0100292 entry.addr.u.ip6 = pg->addr.u.ip6;
Cong Wang37a393b2012-12-11 22:23:07 +0000293#endif
Elad Raz9e8430f2016-02-03 09:57:06 +0100294 entry.vid = pg->addr.vid;
295 __mdb_entry_fill_flags(&entry, pg->flags);
296 __br_mdb_notify(dev, &entry, type, pg);
Cong Wang37a393b2012-12-11 22:23:07 +0000297}
298
Satish Ashok949f1e32015-07-23 05:00:53 -0700299static int nlmsg_populate_rtr_fill(struct sk_buff *skb,
300 struct net_device *dev,
301 int ifindex, u32 pid,
302 u32 seq, int type, unsigned int flags)
303{
304 struct br_port_msg *bpm;
305 struct nlmsghdr *nlh;
306 struct nlattr *nest;
307
308 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI);
309 if (!nlh)
310 return -EMSGSIZE;
311
312 bpm = nlmsg_data(nlh);
313 memset(bpm, 0, sizeof(*bpm));
314 bpm->family = AF_BRIDGE;
315 bpm->ifindex = dev->ifindex;
316 nest = nla_nest_start(skb, MDBA_ROUTER);
317 if (!nest)
318 goto cancel;
319
320 if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex))
321 goto end;
322
323 nla_nest_end(skb, nest);
324 nlmsg_end(skb, nlh);
325 return 0;
326
327end:
328 nla_nest_end(skb, nest);
329cancel:
330 nlmsg_cancel(skb, nlh);
331 return -EMSGSIZE;
332}
333
334static inline size_t rtnl_rtr_nlmsg_size(void)
335{
336 return NLMSG_ALIGN(sizeof(struct br_port_msg))
337 + nla_total_size(sizeof(__u32));
338}
339
340void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
341 int type)
342{
343 struct net *net = dev_net(dev);
344 struct sk_buff *skb;
345 int err = -ENOBUFS;
346 int ifindex;
347
348 ifindex = port ? port->dev->ifindex : 0;
349 skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC);
350 if (!skb)
351 goto errout;
352
353 err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF);
354 if (err < 0) {
355 kfree_skb(skb);
356 goto errout;
357 }
358
359 rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
360 return;
361
362errout:
363 rtnl_set_sk_err(net, RTNLGRP_MDB, err);
364}
365
Cong Wangcfd56752012-12-11 22:23:08 +0000366static bool is_valid_mdb_entry(struct br_mdb_entry *entry)
367{
368 if (entry->ifindex == 0)
369 return false;
370
371 if (entry->addr.proto == htons(ETH_P_IP)) {
372 if (!ipv4_is_multicast(entry->addr.u.ip4))
373 return false;
374 if (ipv4_is_local_multicast(entry->addr.u.ip4))
375 return false;
376#if IS_ENABLED(CONFIG_IPV6)
377 } else if (entry->addr.proto == htons(ETH_P_IPV6)) {
Linus Lüssing3c3769e2013-09-04 02:13:39 +0200378 if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6))
Cong Wangcfd56752012-12-11 22:23:08 +0000379 return false;
380#endif
381 } else
382 return false;
Amerigo Wangccb1c312012-12-14 22:09:51 +0000383 if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY)
384 return false;
Nikolay Aleksandrov74fe61f2015-07-10 08:02:08 -0700385 if (entry->vid >= VLAN_VID_MASK)
386 return false;
Cong Wangcfd56752012-12-11 22:23:08 +0000387
388 return true;
389}
390
391static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh,
392 struct net_device **pdev, struct br_mdb_entry **pentry)
393{
394 struct net *net = sock_net(skb->sk);
395 struct br_mdb_entry *entry;
396 struct br_port_msg *bpm;
397 struct nlattr *tb[MDBA_SET_ENTRY_MAX+1];
398 struct net_device *dev;
399 int err;
400
Nicolas Dichtel12d87252015-01-15 16:29:12 +0100401 err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, NULL);
Cong Wangcfd56752012-12-11 22:23:08 +0000402 if (err < 0)
403 return err;
404
405 bpm = nlmsg_data(nlh);
406 if (bpm->ifindex == 0) {
407 pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n");
408 return -EINVAL;
409 }
410
411 dev = __dev_get_by_index(net, bpm->ifindex);
412 if (dev == NULL) {
413 pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n");
414 return -ENODEV;
415 }
416
417 if (!(dev->priv_flags & IFF_EBRIDGE)) {
418 pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n");
419 return -EOPNOTSUPP;
420 }
421
422 *pdev = dev;
423
424 if (!tb[MDBA_SET_ENTRY] ||
425 nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) {
426 pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n");
427 return -EINVAL;
428 }
429
430 entry = nla_data(tb[MDBA_SET_ENTRY]);
431 if (!is_valid_mdb_entry(entry)) {
432 pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n");
433 return -EINVAL;
434 }
435
436 *pentry = entry;
437 return 0;
438}
439
440static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
Elad Raz9e8430f2016-02-03 09:57:06 +0100441 struct br_ip *group, unsigned char state,
442 struct net_bridge_port_group **pg)
Cong Wangcfd56752012-12-11 22:23:08 +0000443{
444 struct net_bridge_mdb_entry *mp;
445 struct net_bridge_port_group *p;
446 struct net_bridge_port_group __rcu **pp;
447 struct net_bridge_mdb_htable *mdb;
Satish Ashokf7e29652015-07-06 05:53:35 -0700448 unsigned long now = jiffies;
Cong Wangcfd56752012-12-11 22:23:08 +0000449 int err;
450
451 mdb = mlock_dereference(br->mdb, br);
452 mp = br_mdb_ip_get(mdb, group);
453 if (!mp) {
454 mp = br_multicast_new_group(br, port, group);
455 err = PTR_ERR(mp);
456 if (IS_ERR(mp))
457 return err;
458 }
459
460 for (pp = &mp->ports;
461 (p = mlock_dereference(*pp, br)) != NULL;
462 pp = &p->next) {
463 if (p->port == port)
464 return -EEXIST;
465 if ((unsigned long)p->port < (unsigned long)port)
466 break;
467 }
468
Amerigo Wangccb1c312012-12-14 22:09:51 +0000469 p = br_multicast_new_port_group(port, group, *pp, state);
Cong Wangcfd56752012-12-11 22:23:08 +0000470 if (unlikely(!p))
471 return -ENOMEM;
472 rcu_assign_pointer(*pp, p);
Elad Raz9e8430f2016-02-03 09:57:06 +0100473 *pg = p;
Satish Ashokf7e29652015-07-06 05:53:35 -0700474 if (state == MDB_TEMPORARY)
475 mod_timer(&p->timer, now + br->multicast_membership_interval);
Cong Wangcfd56752012-12-11 22:23:08 +0000476
Cong Wangcfd56752012-12-11 22:23:08 +0000477 return 0;
478}
479
480static int __br_mdb_add(struct net *net, struct net_bridge *br,
Elad Raz9e8430f2016-02-03 09:57:06 +0100481 struct br_mdb_entry *entry,
482 struct net_bridge_port_group **pg)
Cong Wangcfd56752012-12-11 22:23:08 +0000483{
484 struct br_ip ip;
485 struct net_device *dev;
486 struct net_bridge_port *p;
487 int ret;
488
489 if (!netif_running(br->dev) || br->multicast_disabled)
490 return -EINVAL;
491
492 dev = __dev_get_by_index(net, entry->ifindex);
493 if (!dev)
494 return -ENODEV;
495
496 p = br_port_get_rtnl(dev);
497 if (!p || p->br != br || p->state == BR_STATE_DISABLED)
498 return -EINVAL;
499
Nikolay Aleksandrovf1158b72015-07-07 15:55:56 +0200500 memset(&ip, 0, sizeof(ip));
Nikolay Aleksandrov74fe61f2015-07-10 08:02:08 -0700501 ip.vid = entry->vid;
Cong Wangcfd56752012-12-11 22:23:08 +0000502 ip.proto = entry->addr.proto;
503 if (ip.proto == htons(ETH_P_IP))
504 ip.u.ip4 = entry->addr.u.ip4;
505#if IS_ENABLED(CONFIG_IPV6)
506 else
507 ip.u.ip6 = entry->addr.u.ip6;
508#endif
509
510 spin_lock_bh(&br->multicast_lock);
Elad Raz9e8430f2016-02-03 09:57:06 +0100511 ret = br_mdb_add_group(br, p, &ip, entry->state, pg);
Cong Wangcfd56752012-12-11 22:23:08 +0000512 spin_unlock_bh(&br->multicast_lock);
513 return ret;
514}
515
Thomas Graf661d2962013-03-21 07:45:29 +0000516static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
Cong Wangcfd56752012-12-11 22:23:08 +0000517{
518 struct net *net = sock_net(skb->sk);
Elad Raz9e8430f2016-02-03 09:57:06 +0100519 struct net_bridge_port_group *pg;
Nikolay Aleksandrov2594e902015-09-25 19:00:11 +0200520 struct net_bridge_vlan_group *vg;
Satish Ashoke44deb22015-08-03 13:29:16 +0200521 struct net_device *dev, *pdev;
Cong Wangcfd56752012-12-11 22:23:08 +0000522 struct br_mdb_entry *entry;
Satish Ashoke44deb22015-08-03 13:29:16 +0200523 struct net_bridge_port *p;
Nikolay Aleksandrov2594e902015-09-25 19:00:11 +0200524 struct net_bridge_vlan *v;
Cong Wangcfd56752012-12-11 22:23:08 +0000525 struct net_bridge *br;
526 int err;
527
528 err = br_mdb_parse(skb, nlh, &dev, &entry);
529 if (err < 0)
530 return err;
531
532 br = netdev_priv(dev);
533
Satish Ashoke44deb22015-08-03 13:29:16 +0200534 /* If vlan filtering is enabled and VLAN is not specified
535 * install mdb entry on all vlans configured on the port.
536 */
537 pdev = __dev_get_by_index(net, entry->ifindex);
538 if (!pdev)
539 return -ENODEV;
540
541 p = br_port_get_rtnl(pdev);
542 if (!p || p->br != br || p->state == BR_STATE_DISABLED)
543 return -EINVAL;
544
Nikolay Aleksandrov2594e902015-09-25 19:00:11 +0200545 vg = nbp_vlan_group(p);
546 if (br_vlan_enabled(br) && vg && entry->vid == 0) {
547 list_for_each_entry(v, &vg->vlan_list, vlist) {
548 entry->vid = v->vid;
Elad Raz9e8430f2016-02-03 09:57:06 +0100549 err = __br_mdb_add(net, br, entry, &pg);
Satish Ashoke44deb22015-08-03 13:29:16 +0200550 if (err)
551 break;
Elad Raz9e8430f2016-02-03 09:57:06 +0100552 __br_mdb_notify(dev, entry, RTM_NEWMDB, pg);
Satish Ashoke44deb22015-08-03 13:29:16 +0200553 }
554 } else {
Elad Raz9e8430f2016-02-03 09:57:06 +0100555 err = __br_mdb_add(net, br, entry, &pg);
Satish Ashoke44deb22015-08-03 13:29:16 +0200556 if (!err)
Elad Raz9e8430f2016-02-03 09:57:06 +0100557 __br_mdb_notify(dev, entry, RTM_NEWMDB, pg);
Satish Ashoke44deb22015-08-03 13:29:16 +0200558 }
559
Cong Wangcfd56752012-12-11 22:23:08 +0000560 return err;
561}
562
563static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry)
564{
565 struct net_bridge_mdb_htable *mdb;
566 struct net_bridge_mdb_entry *mp;
567 struct net_bridge_port_group *p;
568 struct net_bridge_port_group __rcu **pp;
569 struct br_ip ip;
570 int err = -EINVAL;
571
572 if (!netif_running(br->dev) || br->multicast_disabled)
573 return -EINVAL;
574
Nikolay Aleksandrovf1158b72015-07-07 15:55:56 +0200575 memset(&ip, 0, sizeof(ip));
Nikolay Aleksandrov74fe61f2015-07-10 08:02:08 -0700576 ip.vid = entry->vid;
Cong Wangcfd56752012-12-11 22:23:08 +0000577 ip.proto = entry->addr.proto;
Satish Ashok51ed7f3e2015-07-09 04:12:45 -0700578 if (ip.proto == htons(ETH_P_IP))
Cong Wangcfd56752012-12-11 22:23:08 +0000579 ip.u.ip4 = entry->addr.u.ip4;
580#if IS_ENABLED(CONFIG_IPV6)
Satish Ashok51ed7f3e2015-07-09 04:12:45 -0700581 else
Cong Wangcfd56752012-12-11 22:23:08 +0000582 ip.u.ip6 = entry->addr.u.ip6;
583#endif
584
585 spin_lock_bh(&br->multicast_lock);
586 mdb = mlock_dereference(br->mdb, br);
587
588 mp = br_mdb_ip_get(mdb, &ip);
589 if (!mp)
590 goto unlock;
591
592 for (pp = &mp->ports;
593 (p = mlock_dereference(*pp, br)) != NULL;
594 pp = &p->next) {
595 if (!p->port || p->port->dev->ifindex != entry->ifindex)
596 continue;
597
598 if (p->port->state == BR_STATE_DISABLED)
599 goto unlock;
600
Elad Raz9d06b6d2016-02-03 09:57:05 +0100601 __mdb_entry_fill_flags(entry, p->flags);
Cong Wangcfd56752012-12-11 22:23:08 +0000602 rcu_assign_pointer(*pp, p->next);
603 hlist_del_init(&p->mglist);
604 del_timer(&p->timer);
605 call_rcu_bh(&p->rcu, br_multicast_free_pg);
606 err = 0;
607
Linus Lüssing454594f2013-10-20 00:58:57 +0200608 if (!mp->ports && !mp->mglist &&
Cong Wangcfd56752012-12-11 22:23:08 +0000609 netif_running(br->dev))
610 mod_timer(&mp->timer, jiffies);
611 break;
612 }
613
614unlock:
615 spin_unlock_bh(&br->multicast_lock);
616 return err;
617}
618
Thomas Graf661d2962013-03-21 07:45:29 +0000619static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
Cong Wangcfd56752012-12-11 22:23:08 +0000620{
Satish Ashoke44deb22015-08-03 13:29:16 +0200621 struct net *net = sock_net(skb->sk);
Nikolay Aleksandrov2594e902015-09-25 19:00:11 +0200622 struct net_bridge_vlan_group *vg;
Satish Ashoke44deb22015-08-03 13:29:16 +0200623 struct net_device *dev, *pdev;
Cong Wangcfd56752012-12-11 22:23:08 +0000624 struct br_mdb_entry *entry;
Satish Ashoke44deb22015-08-03 13:29:16 +0200625 struct net_bridge_port *p;
Nikolay Aleksandrov2594e902015-09-25 19:00:11 +0200626 struct net_bridge_vlan *v;
Cong Wangcfd56752012-12-11 22:23:08 +0000627 struct net_bridge *br;
628 int err;
629
630 err = br_mdb_parse(skb, nlh, &dev, &entry);
631 if (err < 0)
632 return err;
633
634 br = netdev_priv(dev);
635
Satish Ashoke44deb22015-08-03 13:29:16 +0200636 /* If vlan filtering is enabled and VLAN is not specified
637 * delete mdb entry on all vlans configured on the port.
638 */
639 pdev = __dev_get_by_index(net, entry->ifindex);
640 if (!pdev)
641 return -ENODEV;
642
643 p = br_port_get_rtnl(pdev);
644 if (!p || p->br != br || p->state == BR_STATE_DISABLED)
645 return -EINVAL;
646
Nikolay Aleksandrov2594e902015-09-25 19:00:11 +0200647 vg = nbp_vlan_group(p);
648 if (br_vlan_enabled(br) && vg && entry->vid == 0) {
649 list_for_each_entry(v, &vg->vlan_list, vlist) {
650 entry->vid = v->vid;
Satish Ashoke44deb22015-08-03 13:29:16 +0200651 err = __br_mdb_del(br, entry);
652 if (!err)
Elad Raz9e8430f2016-02-03 09:57:06 +0100653 __br_mdb_notify(dev, entry, RTM_DELMDB, NULL);
Satish Ashoke44deb22015-08-03 13:29:16 +0200654 }
655 } else {
656 err = __br_mdb_del(br, entry);
657 if (!err)
Elad Raz9e8430f2016-02-03 09:57:06 +0100658 __br_mdb_notify(dev, entry, RTM_DELMDB, NULL);
Satish Ashoke44deb22015-08-03 13:29:16 +0200659 }
660
Cong Wangcfd56752012-12-11 22:23:08 +0000661 return err;
662}
663
Cong Wangee07c6e2012-12-07 00:04:48 +0000664void br_mdb_init(void)
665{
666 rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, NULL);
Cong Wangcfd56752012-12-11 22:23:08 +0000667 rtnl_register(PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, NULL);
668 rtnl_register(PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, NULL);
Cong Wangee07c6e2012-12-07 00:04:48 +0000669}
Vlad Yasevich63233152012-12-19 09:13:48 +0000670
671void br_mdb_uninit(void)
672{
673 rtnl_unregister(PF_BRIDGE, RTM_GETMDB);
674 rtnl_unregister(PF_BRIDGE, RTM_NEWMDB);
675 rtnl_unregister(PF_BRIDGE, RTM_DELMDB);
676}