Commit | Line | Data |
---|---|---|
eb1d1641 HX |
1 | /* |
2 | * Bridge multicast support. | |
3 | * | |
4 | * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/err.h> | |
07f8ac4a | 14 | #include <linux/export.h> |
eb1d1641 HX |
15 | #include <linux/if_ether.h> |
16 | #include <linux/igmp.h> | |
17 | #include <linux/jhash.h> | |
18 | #include <linux/kernel.h> | |
b195167f | 19 | #include <linux/log2.h> |
eb1d1641 HX |
20 | #include <linux/netdevice.h> |
21 | #include <linux/netfilter_bridge.h> | |
22 | #include <linux/random.h> | |
23 | #include <linux/rculist.h> | |
24 | #include <linux/skbuff.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/timer.h> | |
1c8ad5bf | 27 | #include <linux/inetdevice.h> |
91b02d3d | 28 | #include <linux/mroute.h> |
eb1d1641 | 29 | #include <net/ip.h> |
147c1e9b | 30 | #include <net/switchdev.h> |
dfd56b8b | 31 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
32 | #include <net/ipv6.h> |
33 | #include <net/mld.h> | |
d4c4f07d | 34 | #include <net/ip6_checksum.h> |
3c3769e6 | 35 | #include <net/addrconf.h> |
08b202b6 | 36 | #endif |
eb1d1641 HX |
37 | |
38 | #include "br_private.h" | |
39 | ||
cc0fdd80 | 40 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 41 | struct bridge_mcast_own_query *query); |
754bc547 SA |
42 | static void br_multicast_add_router(struct net_bridge *br, |
43 | struct net_bridge_port *port); | |
bc8c20ac SA |
44 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
45 | struct net_bridge_port *port, | |
46 | __be32 group, | |
6db6f0ea FF |
47 | __u16 vid, |
48 | const unsigned char *src); | |
49 | ||
f12e7d95 | 50 | static void __del_port_router(struct net_bridge_port *p); |
bc8c20ac SA |
51 | #if IS_ENABLED(CONFIG_IPV6) |
52 | static void br_ip6_multicast_leave_group(struct net_bridge *br, | |
53 | struct net_bridge_port *port, | |
54 | const struct in6_addr *group, | |
6db6f0ea | 55 | __u16 vid, const unsigned char *src); |
bc8c20ac | 56 | #endif |
2ce297fc | 57 | unsigned int br_mdb_rehash_seq; |
c83b8fab | 58 | |
8ef2a9a5 YH |
59 | static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b) |
60 | { | |
61 | if (a->proto != b->proto) | |
62 | return 0; | |
b0e9a30d VY |
63 | if (a->vid != b->vid) |
64 | return 0; | |
8ef2a9a5 YH |
65 | switch (a->proto) { |
66 | case htons(ETH_P_IP): | |
67 | return a->u.ip4 == b->u.ip4; | |
dfd56b8b | 68 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
69 | case htons(ETH_P_IPV6): |
70 | return ipv6_addr_equal(&a->u.ip6, &b->u.ip6); | |
71 | #endif | |
8ef2a9a5 YH |
72 | } |
73 | return 0; | |
74 | } | |
75 | ||
b0e9a30d VY |
76 | static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip, |
77 | __u16 vid) | |
eb1d1641 | 78 | { |
b0e9a30d | 79 | return jhash_2words((__force u32)ip, vid, mdb->secret) & (mdb->max - 1); |
eb1d1641 HX |
80 | } |
81 | ||
dfd56b8b | 82 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 83 | static inline int __br_ip6_hash(struct net_bridge_mdb_htable *mdb, |
b0e9a30d VY |
84 | const struct in6_addr *ip, |
85 | __u16 vid) | |
08b202b6 | 86 | { |
b0e9a30d VY |
87 | return jhash_2words(ipv6_addr_hash(ip), vid, |
88 | mdb->secret) & (mdb->max - 1); | |
08b202b6 YH |
89 | } |
90 | #endif | |
91 | ||
8ef2a9a5 YH |
92 | static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb, |
93 | struct br_ip *ip) | |
94 | { | |
95 | switch (ip->proto) { | |
96 | case htons(ETH_P_IP): | |
b0e9a30d | 97 | return __br_ip4_hash(mdb, ip->u.ip4, ip->vid); |
dfd56b8b | 98 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 99 | case htons(ETH_P_IPV6): |
b0e9a30d | 100 | return __br_ip6_hash(mdb, &ip->u.ip6, ip->vid); |
08b202b6 | 101 | #endif |
8ef2a9a5 YH |
102 | } |
103 | return 0; | |
eb1d1641 HX |
104 | } |
105 | ||
106 | static struct net_bridge_mdb_entry *__br_mdb_ip_get( | |
8ef2a9a5 | 107 | struct net_bridge_mdb_htable *mdb, struct br_ip *dst, int hash) |
eb1d1641 HX |
108 | { |
109 | struct net_bridge_mdb_entry *mp; | |
eb1d1641 | 110 | |
b67bfe0d | 111 | hlist_for_each_entry_rcu(mp, &mdb->mhash[hash], hlist[mdb->ver]) { |
8ef2a9a5 | 112 | if (br_ip_equal(&mp->addr, dst)) |
eb1d1641 HX |
113 | return mp; |
114 | } | |
115 | ||
116 | return NULL; | |
117 | } | |
118 | ||
cfd56754 CW |
119 | struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, |
120 | struct br_ip *dst) | |
7f285fa7 HX |
121 | { |
122 | if (!mdb) | |
123 | return NULL; | |
124 | ||
125 | return __br_mdb_ip_get(mdb, dst, br_ip_hash(mdb, dst)); | |
126 | } | |
127 | ||
8ef2a9a5 | 128 | static struct net_bridge_mdb_entry *br_mdb_ip4_get( |
b0e9a30d | 129 | struct net_bridge_mdb_htable *mdb, __be32 dst, __u16 vid) |
eb1d1641 | 130 | { |
8ef2a9a5 YH |
131 | struct br_ip br_dst; |
132 | ||
133 | br_dst.u.ip4 = dst; | |
134 | br_dst.proto = htons(ETH_P_IP); | |
b0e9a30d | 135 | br_dst.vid = vid; |
0821ec55 | 136 | |
7f285fa7 | 137 | return br_mdb_ip_get(mdb, &br_dst); |
8ef2a9a5 YH |
138 | } |
139 | ||
dfd56b8b | 140 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 141 | static struct net_bridge_mdb_entry *br_mdb_ip6_get( |
b0e9a30d VY |
142 | struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst, |
143 | __u16 vid) | |
08b202b6 YH |
144 | { |
145 | struct br_ip br_dst; | |
0821ec55 | 146 | |
4e3fd7a0 | 147 | br_dst.u.ip6 = *dst; |
08b202b6 | 148 | br_dst.proto = htons(ETH_P_IPV6); |
b0e9a30d | 149 | br_dst.vid = vid; |
08b202b6 | 150 | |
7f285fa7 | 151 | return br_mdb_ip_get(mdb, &br_dst); |
08b202b6 YH |
152 | } |
153 | #endif | |
154 | ||
eb1d1641 | 155 | struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, |
fbca58a2 | 156 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 157 | { |
e8051688 | 158 | struct net_bridge_mdb_htable *mdb = rcu_dereference(br->mdb); |
8ef2a9a5 YH |
159 | struct br_ip ip; |
160 | ||
7f285fa7 | 161 | if (br->multicast_disabled) |
eb1d1641 HX |
162 | return NULL; |
163 | ||
8ef2a9a5 | 164 | if (BR_INPUT_SKB_CB(skb)->igmp) |
eb1d1641 HX |
165 | return NULL; |
166 | ||
8ef2a9a5 | 167 | ip.proto = skb->protocol; |
fbca58a2 | 168 | ip.vid = vid; |
8ef2a9a5 | 169 | |
eb1d1641 HX |
170 | switch (skb->protocol) { |
171 | case htons(ETH_P_IP): | |
8ef2a9a5 YH |
172 | ip.u.ip4 = ip_hdr(skb)->daddr; |
173 | break; | |
dfd56b8b | 174 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 175 | case htons(ETH_P_IPV6): |
4e3fd7a0 | 176 | ip.u.ip6 = ipv6_hdr(skb)->daddr; |
08b202b6 YH |
177 | break; |
178 | #endif | |
8ef2a9a5 YH |
179 | default: |
180 | return NULL; | |
eb1d1641 HX |
181 | } |
182 | ||
8ef2a9a5 | 183 | return br_mdb_ip_get(mdb, &ip); |
eb1d1641 HX |
184 | } |
185 | ||
186 | static void br_mdb_free(struct rcu_head *head) | |
187 | { | |
188 | struct net_bridge_mdb_htable *mdb = | |
189 | container_of(head, struct net_bridge_mdb_htable, rcu); | |
190 | struct net_bridge_mdb_htable *old = mdb->old; | |
191 | ||
192 | mdb->old = NULL; | |
193 | kfree(old->mhash); | |
194 | kfree(old); | |
195 | } | |
196 | ||
197 | static int br_mdb_copy(struct net_bridge_mdb_htable *new, | |
198 | struct net_bridge_mdb_htable *old, | |
199 | int elasticity) | |
200 | { | |
201 | struct net_bridge_mdb_entry *mp; | |
eb1d1641 HX |
202 | int maxlen; |
203 | int len; | |
204 | int i; | |
205 | ||
206 | for (i = 0; i < old->max; i++) | |
b67bfe0d | 207 | hlist_for_each_entry(mp, &old->mhash[i], hlist[old->ver]) |
eb1d1641 | 208 | hlist_add_head(&mp->hlist[new->ver], |
8ef2a9a5 | 209 | &new->mhash[br_ip_hash(new, &mp->addr)]); |
eb1d1641 HX |
210 | |
211 | if (!elasticity) | |
212 | return 0; | |
213 | ||
214 | maxlen = 0; | |
215 | for (i = 0; i < new->max; i++) { | |
216 | len = 0; | |
b67bfe0d | 217 | hlist_for_each_entry(mp, &new->mhash[i], hlist[new->ver]) |
eb1d1641 HX |
218 | len++; |
219 | if (len > maxlen) | |
220 | maxlen = len; | |
221 | } | |
222 | ||
223 | return maxlen > elasticity ? -EINVAL : 0; | |
224 | } | |
225 | ||
cfd56754 | 226 | void br_multicast_free_pg(struct rcu_head *head) |
eb1d1641 HX |
227 | { |
228 | struct net_bridge_port_group *p = | |
229 | container_of(head, struct net_bridge_port_group, rcu); | |
230 | ||
231 | kfree(p); | |
232 | } | |
233 | ||
234 | static void br_multicast_free_group(struct rcu_head *head) | |
235 | { | |
236 | struct net_bridge_mdb_entry *mp = | |
237 | container_of(head, struct net_bridge_mdb_entry, rcu); | |
238 | ||
239 | kfree(mp); | |
240 | } | |
241 | ||
88c1f37f | 242 | static void br_multicast_group_expired(struct timer_list *t) |
eb1d1641 | 243 | { |
88c1f37f | 244 | struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer); |
eb1d1641 HX |
245 | struct net_bridge *br = mp->br; |
246 | struct net_bridge_mdb_htable *mdb; | |
247 | ||
248 | spin_lock(&br->multicast_lock); | |
249 | if (!netif_running(br->dev) || timer_pending(&mp->timer)) | |
250 | goto out; | |
251 | ||
ff0fd34e | 252 | mp->host_joined = false; |
2a26028d | 253 | br_mdb_notify(br->dev, NULL, &mp->addr, RTM_DELMDB, 0); |
eb1d1641 HX |
254 | |
255 | if (mp->ports) | |
256 | goto out; | |
257 | ||
e8051688 ED |
258 | mdb = mlock_dereference(br->mdb, br); |
259 | ||
eb1d1641 HX |
260 | hlist_del_rcu(&mp->hlist[mdb->ver]); |
261 | mdb->size--; | |
262 | ||
eb1d1641 HX |
263 | call_rcu_bh(&mp->rcu, br_multicast_free_group); |
264 | ||
265 | out: | |
266 | spin_unlock(&br->multicast_lock); | |
267 | } | |
268 | ||
269 | static void br_multicast_del_pg(struct net_bridge *br, | |
270 | struct net_bridge_port_group *pg) | |
271 | { | |
e8051688 | 272 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 HX |
273 | struct net_bridge_mdb_entry *mp; |
274 | struct net_bridge_port_group *p; | |
e8051688 ED |
275 | struct net_bridge_port_group __rcu **pp; |
276 | ||
277 | mdb = mlock_dereference(br->mdb, br); | |
eb1d1641 | 278 | |
8ef2a9a5 | 279 | mp = br_mdb_ip_get(mdb, &pg->addr); |
eb1d1641 HX |
280 | if (WARN_ON(!mp)) |
281 | return; | |
282 | ||
e8051688 ED |
283 | for (pp = &mp->ports; |
284 | (p = mlock_dereference(*pp, br)) != NULL; | |
285 | pp = &p->next) { | |
eb1d1641 HX |
286 | if (p != pg) |
287 | continue; | |
288 | ||
83f6a740 | 289 | rcu_assign_pointer(*pp, p->next); |
eb1d1641 HX |
290 | hlist_del_init(&p->mglist); |
291 | del_timer(&p->timer); | |
45ebcce5 ER |
292 | br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB, |
293 | p->flags); | |
eb1d1641 HX |
294 | call_rcu_bh(&p->rcu, br_multicast_free_pg); |
295 | ||
ff0fd34e | 296 | if (!mp->ports && !mp->host_joined && |
eb1d1641 HX |
297 | netif_running(br->dev)) |
298 | mod_timer(&mp->timer, jiffies); | |
299 | ||
300 | return; | |
301 | } | |
302 | ||
303 | WARN_ON(1); | |
304 | } | |
305 | ||
88c1f37f | 306 | static void br_multicast_port_group_expired(struct timer_list *t) |
eb1d1641 | 307 | { |
88c1f37f | 308 | struct net_bridge_port_group *pg = from_timer(pg, t, timer); |
eb1d1641 HX |
309 | struct net_bridge *br = pg->port->br; |
310 | ||
311 | spin_lock(&br->multicast_lock); | |
312 | if (!netif_running(br->dev) || timer_pending(&pg->timer) || | |
9d06b6d8 | 313 | hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT) |
eb1d1641 HX |
314 | goto out; |
315 | ||
316 | br_multicast_del_pg(br, pg); | |
317 | ||
318 | out: | |
319 | spin_unlock(&br->multicast_lock); | |
320 | } | |
321 | ||
e8051688 | 322 | static int br_mdb_rehash(struct net_bridge_mdb_htable __rcu **mdbp, int max, |
eb1d1641 HX |
323 | int elasticity) |
324 | { | |
e8051688 | 325 | struct net_bridge_mdb_htable *old = rcu_dereference_protected(*mdbp, 1); |
eb1d1641 HX |
326 | struct net_bridge_mdb_htable *mdb; |
327 | int err; | |
328 | ||
329 | mdb = kmalloc(sizeof(*mdb), GFP_ATOMIC); | |
330 | if (!mdb) | |
331 | return -ENOMEM; | |
332 | ||
333 | mdb->max = max; | |
334 | mdb->old = old; | |
335 | ||
6396bb22 | 336 | mdb->mhash = kcalloc(max, sizeof(*mdb->mhash), GFP_ATOMIC); |
eb1d1641 HX |
337 | if (!mdb->mhash) { |
338 | kfree(mdb); | |
339 | return -ENOMEM; | |
340 | } | |
341 | ||
342 | mdb->size = old ? old->size : 0; | |
343 | mdb->ver = old ? old->ver ^ 1 : 0; | |
344 | ||
345 | if (!old || elasticity) | |
346 | get_random_bytes(&mdb->secret, sizeof(mdb->secret)); | |
347 | else | |
348 | mdb->secret = old->secret; | |
349 | ||
350 | if (!old) | |
351 | goto out; | |
352 | ||
353 | err = br_mdb_copy(mdb, old, elasticity); | |
354 | if (err) { | |
355 | kfree(mdb->mhash); | |
356 | kfree(mdb); | |
357 | return err; | |
358 | } | |
359 | ||
2ce297fc | 360 | br_mdb_rehash_seq++; |
eb1d1641 HX |
361 | call_rcu_bh(&mdb->rcu, br_mdb_free); |
362 | ||
363 | out: | |
364 | rcu_assign_pointer(*mdbp, mdb); | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
8ef2a9a5 | 369 | static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
370 | __be32 group, |
371 | u8 *igmp_type) | |
eb1d1641 | 372 | { |
5e923585 NA |
373 | struct igmpv3_query *ihv3; |
374 | size_t igmp_hdr_size; | |
eb1d1641 HX |
375 | struct sk_buff *skb; |
376 | struct igmphdr *ih; | |
377 | struct ethhdr *eth; | |
378 | struct iphdr *iph; | |
379 | ||
5e923585 NA |
380 | igmp_hdr_size = sizeof(*ih); |
381 | if (br->multicast_igmp_version == 3) | |
382 | igmp_hdr_size = sizeof(*ihv3); | |
eb1d1641 | 383 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) + |
5e923585 | 384 | igmp_hdr_size + 4); |
eb1d1641 HX |
385 | if (!skb) |
386 | goto out; | |
387 | ||
388 | skb->protocol = htons(ETH_P_IP); | |
389 | ||
390 | skb_reset_mac_header(skb); | |
391 | eth = eth_hdr(skb); | |
392 | ||
e5a727f6 | 393 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
eb1d1641 HX |
394 | eth->h_dest[0] = 1; |
395 | eth->h_dest[1] = 0; | |
396 | eth->h_dest[2] = 0x5e; | |
397 | eth->h_dest[3] = 0; | |
398 | eth->h_dest[4] = 0; | |
399 | eth->h_dest[5] = 1; | |
400 | eth->h_proto = htons(ETH_P_IP); | |
401 | skb_put(skb, sizeof(*eth)); | |
402 | ||
403 | skb_set_network_header(skb, skb->len); | |
404 | iph = ip_hdr(skb); | |
405 | ||
406 | iph->version = 4; | |
407 | iph->ihl = 6; | |
408 | iph->tos = 0xc0; | |
5e923585 | 409 | iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4); |
eb1d1641 HX |
410 | iph->id = 0; |
411 | iph->frag_off = htons(IP_DF); | |
412 | iph->ttl = 1; | |
413 | iph->protocol = IPPROTO_IGMP; | |
1c8ad5bf CW |
414 | iph->saddr = br->multicast_query_use_ifaddr ? |
415 | inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0; | |
eb1d1641 HX |
416 | iph->daddr = htonl(INADDR_ALLHOSTS_GROUP); |
417 | ((u8 *)&iph[1])[0] = IPOPT_RA; | |
418 | ((u8 *)&iph[1])[1] = 4; | |
419 | ((u8 *)&iph[1])[2] = 0; | |
420 | ((u8 *)&iph[1])[3] = 0; | |
421 | ip_send_check(iph); | |
422 | skb_put(skb, 24); | |
423 | ||
424 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 425 | *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY; |
eb1d1641 | 426 | |
5e923585 NA |
427 | switch (br->multicast_igmp_version) { |
428 | case 2: | |
429 | ih = igmp_hdr(skb); | |
430 | ih->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
431 | ih->code = (group ? br->multicast_last_member_interval : | |
432 | br->multicast_query_response_interval) / | |
433 | (HZ / IGMP_TIMER_SCALE); | |
434 | ih->group = group; | |
435 | ih->csum = 0; | |
436 | ih->csum = ip_compute_csum((void *)ih, sizeof(*ih)); | |
437 | break; | |
438 | case 3: | |
439 | ihv3 = igmpv3_query_hdr(skb); | |
440 | ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
441 | ihv3->code = (group ? br->multicast_last_member_interval : | |
442 | br->multicast_query_response_interval) / | |
443 | (HZ / IGMP_TIMER_SCALE); | |
444 | ihv3->group = group; | |
445 | ihv3->qqic = br->multicast_query_interval / HZ; | |
446 | ihv3->nsrcs = 0; | |
447 | ihv3->resv = 0; | |
448 | ihv3->suppress = 0; | |
449 | ihv3->qrv = 2; | |
450 | ihv3->csum = 0; | |
451 | ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3)); | |
452 | break; | |
453 | } | |
454 | ||
455 | skb_put(skb, igmp_hdr_size); | |
eb1d1641 HX |
456 | __skb_pull(skb, sizeof(*eth)); |
457 | ||
458 | out: | |
459 | return skb; | |
460 | } | |
461 | ||
dfd56b8b | 462 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 463 | static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
464 | const struct in6_addr *grp, |
465 | u8 *igmp_type) | |
08b202b6 | 466 | { |
aa2ae3e7 NA |
467 | struct mld2_query *mld2q; |
468 | unsigned long interval; | |
08b202b6 YH |
469 | struct ipv6hdr *ip6h; |
470 | struct mld_msg *mldq; | |
aa2ae3e7 NA |
471 | size_t mld_hdr_size; |
472 | struct sk_buff *skb; | |
08b202b6 YH |
473 | struct ethhdr *eth; |
474 | u8 *hopopt; | |
08b202b6 | 475 | |
aa2ae3e7 NA |
476 | mld_hdr_size = sizeof(*mldq); |
477 | if (br->multicast_mld_version == 2) | |
478 | mld_hdr_size = sizeof(*mld2q); | |
08b202b6 | 479 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) + |
aa2ae3e7 | 480 | 8 + mld_hdr_size); |
08b202b6 YH |
481 | if (!skb) |
482 | goto out; | |
483 | ||
484 | skb->protocol = htons(ETH_P_IPV6); | |
485 | ||
486 | /* Ethernet header */ | |
487 | skb_reset_mac_header(skb); | |
488 | eth = eth_hdr(skb); | |
489 | ||
e5a727f6 | 490 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
08b202b6 YH |
491 | eth->h_proto = htons(ETH_P_IPV6); |
492 | skb_put(skb, sizeof(*eth)); | |
493 | ||
494 | /* IPv6 header + HbH option */ | |
495 | skb_set_network_header(skb, skb->len); | |
496 | ip6h = ipv6_hdr(skb); | |
497 | ||
498 | *(__force __be32 *)ip6h = htonl(0x60000000); | |
aa2ae3e7 | 499 | ip6h->payload_len = htons(8 + mld_hdr_size); |
08b202b6 YH |
500 | ip6h->nexthdr = IPPROTO_HOPOPTS; |
501 | ip6h->hop_limit = 1; | |
a7bff75b | 502 | ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1)); |
d1d81d4c UW |
503 | if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, |
504 | &ip6h->saddr)) { | |
505 | kfree_skb(skb); | |
0888d5f3 | 506 | br->has_ipv6_addr = 0; |
d1d81d4c UW |
507 | return NULL; |
508 | } | |
0888d5f3 | 509 | |
510 | br->has_ipv6_addr = 1; | |
36cff5a1 | 511 | ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); |
08b202b6 YH |
512 | |
513 | hopopt = (u8 *)(ip6h + 1); | |
514 | hopopt[0] = IPPROTO_ICMPV6; /* next hdr */ | |
515 | hopopt[1] = 0; /* length of HbH */ | |
516 | hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */ | |
517 | hopopt[3] = 2; /* Length of RA Option */ | |
518 | hopopt[4] = 0; /* Type = 0x0000 (MLD) */ | |
519 | hopopt[5] = 0; | |
1de5a71c EZ |
520 | hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */ |
521 | hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */ | |
08b202b6 YH |
522 | |
523 | skb_put(skb, sizeof(*ip6h) + 8); | |
524 | ||
525 | /* ICMPv6 */ | |
526 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 527 | interval = ipv6_addr_any(grp) ? |
32de868c LL |
528 | br->multicast_query_response_interval : |
529 | br->multicast_last_member_interval; | |
1080ab95 | 530 | *igmp_type = ICMPV6_MGM_QUERY; |
aa2ae3e7 NA |
531 | switch (br->multicast_mld_version) { |
532 | case 1: | |
533 | mldq = (struct mld_msg *)icmp6_hdr(skb); | |
534 | mldq->mld_type = ICMPV6_MGM_QUERY; | |
535 | mldq->mld_code = 0; | |
536 | mldq->mld_cksum = 0; | |
537 | mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval)); | |
538 | mldq->mld_reserved = 0; | |
539 | mldq->mld_mca = *grp; | |
540 | mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
541 | sizeof(*mldq), IPPROTO_ICMPV6, | |
542 | csum_partial(mldq, | |
543 | sizeof(*mldq), | |
544 | 0)); | |
545 | break; | |
546 | case 2: | |
547 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
53631a5f | 548 | mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval)); |
aa2ae3e7 NA |
549 | mld2q->mld2q_type = ICMPV6_MGM_QUERY; |
550 | mld2q->mld2q_code = 0; | |
551 | mld2q->mld2q_cksum = 0; | |
552 | mld2q->mld2q_resv1 = 0; | |
553 | mld2q->mld2q_resv2 = 0; | |
554 | mld2q->mld2q_suppress = 0; | |
555 | mld2q->mld2q_qrv = 2; | |
556 | mld2q->mld2q_nsrcs = 0; | |
557 | mld2q->mld2q_qqic = br->multicast_query_interval / HZ; | |
558 | mld2q->mld2q_mca = *grp; | |
559 | mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
560 | sizeof(*mld2q), | |
561 | IPPROTO_ICMPV6, | |
562 | csum_partial(mld2q, | |
563 | sizeof(*mld2q), | |
564 | 0)); | |
565 | break; | |
566 | } | |
567 | skb_put(skb, mld_hdr_size); | |
08b202b6 YH |
568 | |
569 | __skb_pull(skb, sizeof(*eth)); | |
570 | ||
571 | out: | |
572 | return skb; | |
573 | } | |
574 | #endif | |
575 | ||
8ef2a9a5 | 576 | static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
577 | struct br_ip *addr, |
578 | u8 *igmp_type) | |
8ef2a9a5 YH |
579 | { |
580 | switch (addr->proto) { | |
581 | case htons(ETH_P_IP): | |
1080ab95 | 582 | return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type); |
dfd56b8b | 583 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 584 | case htons(ETH_P_IPV6): |
1080ab95 NA |
585 | return br_ip6_multicast_alloc_query(br, &addr->u.ip6, |
586 | igmp_type); | |
08b202b6 | 587 | #endif |
8ef2a9a5 YH |
588 | } |
589 | return NULL; | |
590 | } | |
591 | ||
eb1d1641 | 592 | static struct net_bridge_mdb_entry *br_multicast_get_group( |
8ef2a9a5 YH |
593 | struct net_bridge *br, struct net_bridge_port *port, |
594 | struct br_ip *group, int hash) | |
eb1d1641 | 595 | { |
e8051688 | 596 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 | 597 | struct net_bridge_mdb_entry *mp; |
95c96174 ED |
598 | unsigned int count = 0; |
599 | unsigned int max; | |
eb1d1641 HX |
600 | int elasticity; |
601 | int err; | |
602 | ||
e8051688 | 603 | mdb = rcu_dereference_protected(br->mdb, 1); |
b67bfe0d | 604 | hlist_for_each_entry(mp, &mdb->mhash[hash], hlist[mdb->ver]) { |
eb1d1641 | 605 | count++; |
8ef2a9a5 | 606 | if (unlikely(br_ip_equal(group, &mp->addr))) |
eb1d1641 | 607 | return mp; |
eb1d1641 HX |
608 | } |
609 | ||
610 | elasticity = 0; | |
611 | max = mdb->max; | |
612 | ||
613 | if (unlikely(count > br->hash_elasticity && count)) { | |
614 | if (net_ratelimit()) | |
28a16c97 | 615 | br_info(br, "Multicast hash table " |
616 | "chain limit reached: %s\n", | |
617 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
618 | |
619 | elasticity = br->hash_elasticity; | |
620 | } | |
621 | ||
622 | if (mdb->size >= max) { | |
623 | max *= 2; | |
036be6db TG |
624 | if (unlikely(max > br->hash_max)) { |
625 | br_warn(br, "Multicast hash table maximum of %d " | |
626 | "reached, disabling snooping: %s\n", | |
627 | br->hash_max, | |
628 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
629 | err = -E2BIG; |
630 | disable: | |
631 | br->multicast_disabled = 1; | |
632 | goto err; | |
633 | } | |
634 | } | |
635 | ||
636 | if (max > mdb->max || elasticity) { | |
637 | if (mdb->old) { | |
638 | if (net_ratelimit()) | |
28a16c97 | 639 | br_info(br, "Multicast hash table " |
640 | "on fire: %s\n", | |
641 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
642 | err = -EEXIST; |
643 | goto err; | |
644 | } | |
645 | ||
646 | err = br_mdb_rehash(&br->mdb, max, elasticity); | |
647 | if (err) { | |
28a16c97 | 648 | br_warn(br, "Cannot rehash multicast " |
649 | "hash table, disabling snooping: %s, %d, %d\n", | |
650 | port ? port->dev->name : br->dev->name, | |
651 | mdb->size, err); | |
eb1d1641 HX |
652 | goto disable; |
653 | } | |
654 | ||
655 | err = -EAGAIN; | |
656 | goto err; | |
657 | } | |
658 | ||
659 | return NULL; | |
660 | ||
661 | err: | |
662 | mp = ERR_PTR(err); | |
663 | return mp; | |
664 | } | |
665 | ||
cfd56754 | 666 | struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, |
5e923585 NA |
667 | struct net_bridge_port *p, |
668 | struct br_ip *group) | |
eb1d1641 | 669 | { |
e8051688 | 670 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 HX |
671 | struct net_bridge_mdb_entry *mp; |
672 | int hash; | |
4c0833bc | 673 | int err; |
eb1d1641 | 674 | |
e8051688 | 675 | mdb = rcu_dereference_protected(br->mdb, 1); |
eb1d1641 | 676 | if (!mdb) { |
4c0833bc TK |
677 | err = br_mdb_rehash(&br->mdb, BR_HASH_SIZE, 0); |
678 | if (err) | |
679 | return ERR_PTR(err); | |
eb1d1641 HX |
680 | goto rehash; |
681 | } | |
682 | ||
683 | hash = br_ip_hash(mdb, group); | |
5e923585 | 684 | mp = br_multicast_get_group(br, p, group, hash); |
eb1d1641 HX |
685 | switch (PTR_ERR(mp)) { |
686 | case 0: | |
687 | break; | |
688 | ||
689 | case -EAGAIN: | |
690 | rehash: | |
e8051688 | 691 | mdb = rcu_dereference_protected(br->mdb, 1); |
eb1d1641 HX |
692 | hash = br_ip_hash(mdb, group); |
693 | break; | |
694 | ||
695 | default: | |
696 | goto out; | |
697 | } | |
698 | ||
699 | mp = kzalloc(sizeof(*mp), GFP_ATOMIC); | |
700 | if (unlikely(!mp)) | |
4c0833bc | 701 | return ERR_PTR(-ENOMEM); |
eb1d1641 HX |
702 | |
703 | mp->br = br; | |
8ef2a9a5 | 704 | mp->addr = *group; |
88c1f37f | 705 | timer_setup(&mp->timer, br_multicast_group_expired, 0); |
1faabf2a | 706 | |
eb1d1641 HX |
707 | hlist_add_head_rcu(&mp->hlist[mdb->ver], &mdb->mhash[hash]); |
708 | mdb->size++; | |
709 | ||
710 | out: | |
711 | return mp; | |
712 | } | |
713 | ||
cfd56754 CW |
714 | struct net_bridge_port_group *br_multicast_new_port_group( |
715 | struct net_bridge_port *port, | |
716 | struct br_ip *group, | |
ccb1c31a | 717 | struct net_bridge_port_group __rcu *next, |
6db6f0ea FF |
718 | unsigned char flags, |
719 | const unsigned char *src) | |
cfd56754 CW |
720 | { |
721 | struct net_bridge_port_group *p; | |
722 | ||
723 | p = kzalloc(sizeof(*p), GFP_ATOMIC); | |
724 | if (unlikely(!p)) | |
725 | return NULL; | |
726 | ||
727 | p->addr = *group; | |
728 | p->port = port; | |
9d06b6d8 | 729 | p->flags = flags; |
eca2a43b | 730 | rcu_assign_pointer(p->next, next); |
cfd56754 | 731 | hlist_add_head(&p->mglist, &port->mglist); |
88c1f37f | 732 | timer_setup(&p->timer, br_multicast_port_group_expired, 0); |
6db6f0ea FF |
733 | |
734 | if (src) | |
735 | memcpy(p->eth_addr, src, ETH_ALEN); | |
736 | else | |
737 | memset(p->eth_addr, 0xff, ETH_ALEN); | |
738 | ||
cfd56754 CW |
739 | return p; |
740 | } | |
741 | ||
6db6f0ea FF |
742 | static bool br_port_group_equal(struct net_bridge_port_group *p, |
743 | struct net_bridge_port *port, | |
744 | const unsigned char *src) | |
745 | { | |
746 | if (p->port != port) | |
747 | return false; | |
748 | ||
749 | if (!(port->flags & BR_MULTICAST_TO_UNICAST)) | |
750 | return true; | |
751 | ||
752 | return ether_addr_equal(src, p->eth_addr); | |
753 | } | |
754 | ||
eb1d1641 | 755 | static int br_multicast_add_group(struct net_bridge *br, |
8ef2a9a5 | 756 | struct net_bridge_port *port, |
6db6f0ea FF |
757 | struct br_ip *group, |
758 | const unsigned char *src) | |
eb1d1641 | 759 | { |
e8051688 | 760 | struct net_bridge_port_group __rcu **pp; |
5e923585 NA |
761 | struct net_bridge_port_group *p; |
762 | struct net_bridge_mdb_entry *mp; | |
454594f3 | 763 | unsigned long now = jiffies; |
eb1d1641 HX |
764 | int err; |
765 | ||
eb1d1641 HX |
766 | spin_lock(&br->multicast_lock); |
767 | if (!netif_running(br->dev) || | |
768 | (port && port->state == BR_STATE_DISABLED)) | |
769 | goto out; | |
770 | ||
771 | mp = br_multicast_new_group(br, port, group); | |
772 | err = PTR_ERR(mp); | |
4c0833bc | 773 | if (IS_ERR(mp)) |
eb1d1641 HX |
774 | goto err; |
775 | ||
776 | if (!port) { | |
2a26028d AL |
777 | if (!mp->host_joined) { |
778 | mp->host_joined = true; | |
779 | br_mdb_notify(br->dev, NULL, &mp->addr, RTM_NEWMDB, 0); | |
780 | } | |
454594f3 | 781 | mod_timer(&mp->timer, now + br->multicast_membership_interval); |
eb1d1641 HX |
782 | goto out; |
783 | } | |
784 | ||
e8051688 ED |
785 | for (pp = &mp->ports; |
786 | (p = mlock_dereference(*pp, br)) != NULL; | |
787 | pp = &p->next) { | |
6db6f0ea | 788 | if (br_port_group_equal(p, port, src)) |
454594f3 | 789 | goto found; |
eb1d1641 HX |
790 | if ((unsigned long)p->port < (unsigned long)port) |
791 | break; | |
792 | } | |
793 | ||
6db6f0ea | 794 | p = br_multicast_new_port_group(port, group, *pp, 0, src); |
eb1d1641 HX |
795 | if (unlikely(!p)) |
796 | goto err; | |
eb1d1641 | 797 | rcu_assign_pointer(*pp, p); |
45ebcce5 | 798 | br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0); |
eb1d1641 | 799 | |
454594f3 LL |
800 | found: |
801 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
eb1d1641 HX |
802 | out: |
803 | err = 0; | |
804 | ||
805 | err: | |
806 | spin_unlock(&br->multicast_lock); | |
807 | return err; | |
808 | } | |
809 | ||
8ef2a9a5 YH |
810 | static int br_ip4_multicast_add_group(struct net_bridge *br, |
811 | struct net_bridge_port *port, | |
b0e9a30d | 812 | __be32 group, |
6db6f0ea FF |
813 | __u16 vid, |
814 | const unsigned char *src) | |
8ef2a9a5 YH |
815 | { |
816 | struct br_ip br_group; | |
817 | ||
818 | if (ipv4_is_local_multicast(group)) | |
819 | return 0; | |
820 | ||
821 | br_group.u.ip4 = group; | |
822 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 823 | br_group.vid = vid; |
8ef2a9a5 | 824 | |
6db6f0ea | 825 | return br_multicast_add_group(br, port, &br_group, src); |
8ef2a9a5 YH |
826 | } |
827 | ||
dfd56b8b | 828 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
829 | static int br_ip6_multicast_add_group(struct net_bridge *br, |
830 | struct net_bridge_port *port, | |
b0e9a30d | 831 | const struct in6_addr *group, |
6db6f0ea FF |
832 | __u16 vid, |
833 | const unsigned char *src) | |
08b202b6 YH |
834 | { |
835 | struct br_ip br_group; | |
836 | ||
3c3769e6 | 837 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
838 | return 0; |
839 | ||
4e3fd7a0 | 840 | br_group.u.ip6 = *group; |
9cc6e0c4 | 841 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 842 | br_group.vid = vid; |
08b202b6 | 843 | |
6db6f0ea | 844 | return br_multicast_add_group(br, port, &br_group, src); |
08b202b6 YH |
845 | } |
846 | #endif | |
847 | ||
88c1f37f | 848 | static void br_multicast_router_expired(struct timer_list *t) |
eb1d1641 | 849 | { |
88c1f37f AP |
850 | struct net_bridge_port *port = |
851 | from_timer(port, t, multicast_router_timer); | |
eb1d1641 HX |
852 | struct net_bridge *br = port->br; |
853 | ||
854 | spin_lock(&br->multicast_lock); | |
a55d8246 NA |
855 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
856 | port->multicast_router == MDB_RTR_TYPE_PERM || | |
f12e7d95 | 857 | timer_pending(&port->multicast_router_timer)) |
eb1d1641 HX |
858 | goto out; |
859 | ||
f12e7d95 | 860 | __del_port_router(port); |
eb1d1641 HX |
861 | out: |
862 | spin_unlock(&br->multicast_lock); | |
863 | } | |
864 | ||
77041420 YG |
865 | static void br_mc_router_state_change(struct net_bridge *p, |
866 | bool is_mc_router) | |
867 | { | |
868 | struct switchdev_attr attr = { | |
869 | .orig_dev = p->dev, | |
870 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER, | |
871 | .flags = SWITCHDEV_F_DEFER, | |
872 | .u.mrouter = is_mc_router, | |
873 | }; | |
874 | ||
875 | switchdev_port_attr_set(p->dev, &attr); | |
876 | } | |
877 | ||
88c1f37f | 878 | static void br_multicast_local_router_expired(struct timer_list *t) |
eb1d1641 | 879 | { |
88c1f37f | 880 | struct net_bridge *br = from_timer(br, t, multicast_router_timer); |
77041420 YG |
881 | |
882 | spin_lock(&br->multicast_lock); | |
883 | if (br->multicast_router == MDB_RTR_TYPE_DISABLED || | |
884 | br->multicast_router == MDB_RTR_TYPE_PERM || | |
885 | timer_pending(&br->multicast_router_timer)) | |
886 | goto out; | |
887 | ||
888 | br_mc_router_state_change(br, false); | |
889 | out: | |
890 | spin_unlock(&br->multicast_lock); | |
eb1d1641 HX |
891 | } |
892 | ||
cc0fdd80 | 893 | static void br_multicast_querier_expired(struct net_bridge *br, |
90010b36 | 894 | struct bridge_mcast_own_query *query) |
c83b8fab | 895 | { |
c83b8fab HX |
896 | spin_lock(&br->multicast_lock); |
897 | if (!netif_running(br->dev) || br->multicast_disabled) | |
898 | goto out; | |
899 | ||
cc0fdd80 | 900 | br_multicast_start_querier(br, query); |
c83b8fab HX |
901 | |
902 | out: | |
903 | spin_unlock(&br->multicast_lock); | |
904 | } | |
905 | ||
88c1f37f | 906 | static void br_ip4_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 907 | { |
88c1f37f | 908 | struct net_bridge *br = from_timer(br, t, ip4_other_query.timer); |
cc0fdd80 | 909 | |
90010b36 | 910 | br_multicast_querier_expired(br, &br->ip4_own_query); |
cc0fdd80 LL |
911 | } |
912 | ||
913 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 914 | static void br_ip6_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 915 | { |
88c1f37f | 916 | struct net_bridge *br = from_timer(br, t, ip6_other_query.timer); |
cc0fdd80 | 917 | |
90010b36 | 918 | br_multicast_querier_expired(br, &br->ip6_own_query); |
cc0fdd80 LL |
919 | } |
920 | #endif | |
921 | ||
dc4eb53a LL |
922 | static void br_multicast_select_own_querier(struct net_bridge *br, |
923 | struct br_ip *ip, | |
924 | struct sk_buff *skb) | |
925 | { | |
926 | if (ip->proto == htons(ETH_P_IP)) | |
927 | br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr; | |
928 | #if IS_ENABLED(CONFIG_IPV6) | |
929 | else | |
930 | br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr; | |
931 | #endif | |
932 | } | |
933 | ||
8ef2a9a5 YH |
934 | static void __br_multicast_send_query(struct net_bridge *br, |
935 | struct net_bridge_port *port, | |
936 | struct br_ip *ip) | |
eb1d1641 | 937 | { |
eb1d1641 | 938 | struct sk_buff *skb; |
1080ab95 | 939 | u8 igmp_type; |
eb1d1641 | 940 | |
1080ab95 | 941 | skb = br_multicast_alloc_query(br, ip, &igmp_type); |
eb1d1641 | 942 | if (!skb) |
8ef2a9a5 | 943 | return; |
eb1d1641 HX |
944 | |
945 | if (port) { | |
eb1d1641 | 946 | skb->dev = port->dev; |
a65056ec | 947 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 948 | BR_MCAST_DIR_TX); |
29a26a56 EB |
949 | NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, |
950 | dev_net(port->dev), NULL, skb, NULL, skb->dev, | |
f0b4eece | 951 | br_dev_queue_push_xmit); |
dc4eb53a LL |
952 | } else { |
953 | br_multicast_select_own_querier(br, ip, skb); | |
a65056ec | 954 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 955 | BR_MCAST_DIR_RX); |
eb1d1641 | 956 | netif_rx(skb); |
dc4eb53a | 957 | } |
8ef2a9a5 YH |
958 | } |
959 | ||
960 | static void br_multicast_send_query(struct net_bridge *br, | |
cc0fdd80 | 961 | struct net_bridge_port *port, |
90010b36 | 962 | struct bridge_mcast_own_query *own_query) |
8ef2a9a5 | 963 | { |
90010b36 | 964 | struct bridge_mcast_other_query *other_query = NULL; |
5e923585 NA |
965 | struct br_ip br_group; |
966 | unsigned long time; | |
8ef2a9a5 YH |
967 | |
968 | if (!netif_running(br->dev) || br->multicast_disabled || | |
cc0fdd80 | 969 | !br->multicast_querier) |
8ef2a9a5 YH |
970 | return; |
971 | ||
08b202b6 YH |
972 | memset(&br_group.u, 0, sizeof(br_group.u)); |
973 | ||
90010b36 LL |
974 | if (port ? (own_query == &port->ip4_own_query) : |
975 | (own_query == &br->ip4_own_query)) { | |
976 | other_query = &br->ip4_other_query; | |
cc0fdd80 | 977 | br_group.proto = htons(ETH_P_IP); |
dfd56b8b | 978 | #if IS_ENABLED(CONFIG_IPV6) |
cc0fdd80 | 979 | } else { |
90010b36 | 980 | other_query = &br->ip6_other_query; |
cc0fdd80 | 981 | br_group.proto = htons(ETH_P_IPV6); |
08b202b6 | 982 | #endif |
cc0fdd80 LL |
983 | } |
984 | ||
90010b36 | 985 | if (!other_query || timer_pending(&other_query->timer)) |
cc0fdd80 LL |
986 | return; |
987 | ||
988 | __br_multicast_send_query(br, port, &br_group); | |
eb1d1641 | 989 | |
eb1d1641 | 990 | time = jiffies; |
90010b36 | 991 | time += own_query->startup_sent < br->multicast_startup_query_count ? |
eb1d1641 HX |
992 | br->multicast_startup_query_interval : |
993 | br->multicast_query_interval; | |
90010b36 | 994 | mod_timer(&own_query->timer, time); |
eb1d1641 HX |
995 | } |
996 | ||
90010b36 LL |
997 | static void |
998 | br_multicast_port_query_expired(struct net_bridge_port *port, | |
999 | struct bridge_mcast_own_query *query) | |
eb1d1641 | 1000 | { |
eb1d1641 HX |
1001 | struct net_bridge *br = port->br; |
1002 | ||
1003 | spin_lock(&br->multicast_lock); | |
02a780c0 DC |
1004 | if (port->state == BR_STATE_DISABLED || |
1005 | port->state == BR_STATE_BLOCKING) | |
eb1d1641 HX |
1006 | goto out; |
1007 | ||
cc0fdd80 LL |
1008 | if (query->startup_sent < br->multicast_startup_query_count) |
1009 | query->startup_sent++; | |
eb1d1641 | 1010 | |
cc0fdd80 | 1011 | br_multicast_send_query(port->br, port, query); |
eb1d1641 HX |
1012 | |
1013 | out: | |
1014 | spin_unlock(&br->multicast_lock); | |
1015 | } | |
1016 | ||
88c1f37f | 1017 | static void br_ip4_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 1018 | { |
88c1f37f | 1019 | struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer); |
cc0fdd80 | 1020 | |
90010b36 | 1021 | br_multicast_port_query_expired(port, &port->ip4_own_query); |
cc0fdd80 LL |
1022 | } |
1023 | ||
1024 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 1025 | static void br_ip6_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 1026 | { |
88c1f37f | 1027 | struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer); |
cc0fdd80 | 1028 | |
90010b36 | 1029 | br_multicast_port_query_expired(port, &port->ip6_own_query); |
cc0fdd80 LL |
1030 | } |
1031 | #endif | |
1032 | ||
147c1e9b NF |
1033 | static void br_mc_disabled_update(struct net_device *dev, bool value) |
1034 | { | |
1035 | struct switchdev_attr attr = { | |
1036 | .orig_dev = dev, | |
1037 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED, | |
1038 | .flags = SWITCHDEV_F_DEFER, | |
1039 | .u.mc_disabled = value, | |
1040 | }; | |
1041 | ||
1042 | switchdev_port_attr_set(dev, &attr); | |
1043 | } | |
1044 | ||
1080ab95 | 1045 | int br_multicast_add_port(struct net_bridge_port *port) |
eb1d1641 | 1046 | { |
7f0aec7a | 1047 | port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
eb1d1641 | 1048 | |
88c1f37f AP |
1049 | timer_setup(&port->multicast_router_timer, |
1050 | br_multicast_router_expired, 0); | |
1051 | timer_setup(&port->ip4_own_query.timer, | |
1052 | br_ip4_multicast_port_query_expired, 0); | |
cc0fdd80 | 1053 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f AP |
1054 | timer_setup(&port->ip6_own_query.timer, |
1055 | br_ip6_multicast_port_query_expired, 0); | |
cc0fdd80 | 1056 | #endif |
147c1e9b NF |
1057 | br_mc_disabled_update(port->dev, port->br->multicast_disabled); |
1058 | ||
1080ab95 NA |
1059 | port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); |
1060 | if (!port->mcast_stats) | |
1061 | return -ENOMEM; | |
1062 | ||
1063 | return 0; | |
eb1d1641 HX |
1064 | } |
1065 | ||
1066 | void br_multicast_del_port(struct net_bridge_port *port) | |
1067 | { | |
e10177ab SA |
1068 | struct net_bridge *br = port->br; |
1069 | struct net_bridge_port_group *pg; | |
1070 | struct hlist_node *n; | |
1071 | ||
1072 | /* Take care of the remaining groups, only perm ones should be left */ | |
1073 | spin_lock_bh(&br->multicast_lock); | |
1074 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) | |
1075 | br_multicast_del_pg(br, pg); | |
1076 | spin_unlock_bh(&br->multicast_lock); | |
eb1d1641 | 1077 | del_timer_sync(&port->multicast_router_timer); |
1080ab95 | 1078 | free_percpu(port->mcast_stats); |
eb1d1641 HX |
1079 | } |
1080 | ||
90010b36 | 1081 | static void br_multicast_enable(struct bridge_mcast_own_query *query) |
561f1103 | 1082 | { |
cc0fdd80 | 1083 | query->startup_sent = 0; |
561f1103 | 1084 | |
cc0fdd80 LL |
1085 | if (try_to_del_timer_sync(&query->timer) >= 0 || |
1086 | del_timer(&query->timer)) | |
1087 | mod_timer(&query->timer, jiffies); | |
561f1103 HX |
1088 | } |
1089 | ||
7cb3f921 | 1090 | static void __br_multicast_enable_port(struct net_bridge_port *port) |
eb1d1641 HX |
1091 | { |
1092 | struct net_bridge *br = port->br; | |
1093 | ||
eb1d1641 | 1094 | if (br->multicast_disabled || !netif_running(br->dev)) |
7cb3f921 | 1095 | return; |
eb1d1641 | 1096 | |
90010b36 | 1097 | br_multicast_enable(&port->ip4_own_query); |
cc0fdd80 | 1098 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1099 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 1100 | #endif |
7f0aec7a NA |
1101 | if (port->multicast_router == MDB_RTR_TYPE_PERM && |
1102 | hlist_unhashed(&port->rlist)) | |
754bc547 | 1103 | br_multicast_add_router(br, port); |
7cb3f921 | 1104 | } |
eb1d1641 | 1105 | |
7cb3f921 NA |
1106 | void br_multicast_enable_port(struct net_bridge_port *port) |
1107 | { | |
1108 | struct net_bridge *br = port->br; | |
1109 | ||
1110 | spin_lock(&br->multicast_lock); | |
1111 | __br_multicast_enable_port(port); | |
eb1d1641 HX |
1112 | spin_unlock(&br->multicast_lock); |
1113 | } | |
1114 | ||
1115 | void br_multicast_disable_port(struct net_bridge_port *port) | |
1116 | { | |
1117 | struct net_bridge *br = port->br; | |
1118 | struct net_bridge_port_group *pg; | |
b67bfe0d | 1119 | struct hlist_node *n; |
eb1d1641 HX |
1120 | |
1121 | spin_lock(&br->multicast_lock); | |
b67bfe0d | 1122 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) |
9d06b6d8 | 1123 | if (!(pg->flags & MDB_PG_FLAGS_PERMANENT)) |
e10177ab | 1124 | br_multicast_del_pg(br, pg); |
eb1d1641 | 1125 | |
f12e7d95 NF |
1126 | __del_port_router(port); |
1127 | ||
eb1d1641 | 1128 | del_timer(&port->multicast_router_timer); |
90010b36 | 1129 | del_timer(&port->ip4_own_query.timer); |
cc0fdd80 | 1130 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1131 | del_timer(&port->ip6_own_query.timer); |
cc0fdd80 | 1132 | #endif |
eb1d1641 HX |
1133 | spin_unlock(&br->multicast_lock); |
1134 | } | |
1135 | ||
8ef2a9a5 YH |
1136 | static int br_ip4_multicast_igmp3_report(struct net_bridge *br, |
1137 | struct net_bridge_port *port, | |
06499098 VY |
1138 | struct sk_buff *skb, |
1139 | u16 vid) | |
eb1d1641 | 1140 | { |
6db6f0ea | 1141 | const unsigned char *src; |
eb1d1641 HX |
1142 | struct igmpv3_report *ih; |
1143 | struct igmpv3_grec *grec; | |
1144 | int i; | |
1145 | int len; | |
1146 | int num; | |
1147 | int type; | |
1148 | int err = 0; | |
1149 | __be32 group; | |
1150 | ||
eb1d1641 HX |
1151 | ih = igmpv3_report_hdr(skb); |
1152 | num = ntohs(ih->ngrec); | |
c2d4fbd2 | 1153 | len = skb_transport_offset(skb) + sizeof(*ih); |
eb1d1641 HX |
1154 | |
1155 | for (i = 0; i < num; i++) { | |
1156 | len += sizeof(*grec); | |
1157 | if (!pskb_may_pull(skb, len)) | |
1158 | return -EINVAL; | |
1159 | ||
fd218cf9 | 1160 | grec = (void *)(skb->data + len - sizeof(*grec)); |
eb1d1641 HX |
1161 | group = grec->grec_mca; |
1162 | type = grec->grec_type; | |
1163 | ||
8eabf95c | 1164 | len += ntohs(grec->grec_nsrcs) * 4; |
eb1d1641 HX |
1165 | if (!pskb_may_pull(skb, len)) |
1166 | return -EINVAL; | |
1167 | ||
1168 | /* We treat this as an IGMPv2 report for now. */ | |
1169 | switch (type) { | |
1170 | case IGMPV3_MODE_IS_INCLUDE: | |
1171 | case IGMPV3_MODE_IS_EXCLUDE: | |
1172 | case IGMPV3_CHANGE_TO_INCLUDE: | |
1173 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
1174 | case IGMPV3_ALLOW_NEW_SOURCES: | |
1175 | case IGMPV3_BLOCK_OLD_SOURCES: | |
1176 | break; | |
1177 | ||
1178 | default: | |
1179 | continue; | |
1180 | } | |
1181 | ||
6db6f0ea | 1182 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
1183 | if ((type == IGMPV3_CHANGE_TO_INCLUDE || |
1184 | type == IGMPV3_MODE_IS_INCLUDE) && | |
1185 | ntohs(grec->grec_nsrcs) == 0) { | |
6db6f0ea | 1186 | br_ip4_multicast_leave_group(br, port, group, vid, src); |
bc8c20ac | 1187 | } else { |
6db6f0ea FF |
1188 | err = br_ip4_multicast_add_group(br, port, group, vid, |
1189 | src); | |
bc8c20ac SA |
1190 | if (err) |
1191 | break; | |
1192 | } | |
eb1d1641 HX |
1193 | } |
1194 | ||
1195 | return err; | |
1196 | } | |
1197 | ||
dfd56b8b | 1198 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1199 | static int br_ip6_multicast_mld2_report(struct net_bridge *br, |
1200 | struct net_bridge_port *port, | |
06499098 VY |
1201 | struct sk_buff *skb, |
1202 | u16 vid) | |
08b202b6 | 1203 | { |
6db6f0ea | 1204 | const unsigned char *src; |
08b202b6 YH |
1205 | struct icmp6hdr *icmp6h; |
1206 | struct mld2_grec *grec; | |
1207 | int i; | |
1208 | int len; | |
1209 | int num; | |
1210 | int err = 0; | |
1211 | ||
1212 | if (!pskb_may_pull(skb, sizeof(*icmp6h))) | |
1213 | return -EINVAL; | |
1214 | ||
1215 | icmp6h = icmp6_hdr(skb); | |
1216 | num = ntohs(icmp6h->icmp6_dataun.un_data16[1]); | |
c2d4fbd2 | 1217 | len = skb_transport_offset(skb) + sizeof(*icmp6h); |
08b202b6 YH |
1218 | |
1219 | for (i = 0; i < num; i++) { | |
1220 | __be16 *nsrcs, _nsrcs; | |
1221 | ||
1222 | nsrcs = skb_header_pointer(skb, | |
1223 | len + offsetof(struct mld2_grec, | |
649e984d | 1224 | grec_nsrcs), |
08b202b6 YH |
1225 | sizeof(_nsrcs), &_nsrcs); |
1226 | if (!nsrcs) | |
1227 | return -EINVAL; | |
1228 | ||
1229 | if (!pskb_may_pull(skb, | |
1230 | len + sizeof(*grec) + | |
d41db9f3 | 1231 | sizeof(struct in6_addr) * ntohs(*nsrcs))) |
08b202b6 YH |
1232 | return -EINVAL; |
1233 | ||
1234 | grec = (struct mld2_grec *)(skb->data + len); | |
d41db9f3 LL |
1235 | len += sizeof(*grec) + |
1236 | sizeof(struct in6_addr) * ntohs(*nsrcs); | |
08b202b6 YH |
1237 | |
1238 | /* We treat these as MLDv1 reports for now. */ | |
1239 | switch (grec->grec_type) { | |
1240 | case MLD2_MODE_IS_INCLUDE: | |
1241 | case MLD2_MODE_IS_EXCLUDE: | |
1242 | case MLD2_CHANGE_TO_INCLUDE: | |
1243 | case MLD2_CHANGE_TO_EXCLUDE: | |
1244 | case MLD2_ALLOW_NEW_SOURCES: | |
1245 | case MLD2_BLOCK_OLD_SOURCES: | |
1246 | break; | |
1247 | ||
1248 | default: | |
1249 | continue; | |
1250 | } | |
1251 | ||
6db6f0ea | 1252 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
1253 | if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE || |
1254 | grec->grec_type == MLD2_MODE_IS_INCLUDE) && | |
1255 | ntohs(*nsrcs) == 0) { | |
1256 | br_ip6_multicast_leave_group(br, port, &grec->grec_mca, | |
6db6f0ea | 1257 | vid, src); |
bc8c20ac SA |
1258 | } else { |
1259 | err = br_ip6_multicast_add_group(br, port, | |
6db6f0ea FF |
1260 | &grec->grec_mca, vid, |
1261 | src); | |
9264251e | 1262 | if (err) |
bc8c20ac SA |
1263 | break; |
1264 | } | |
08b202b6 YH |
1265 | } |
1266 | ||
1267 | return err; | |
1268 | } | |
1269 | #endif | |
1270 | ||
dc4eb53a | 1271 | static bool br_ip4_multicast_select_querier(struct net_bridge *br, |
2cd41431 | 1272 | struct net_bridge_port *port, |
dc4eb53a LL |
1273 | __be32 saddr) |
1274 | { | |
1275 | if (!timer_pending(&br->ip4_own_query.timer) && | |
1276 | !timer_pending(&br->ip4_other_query.timer)) | |
1277 | goto update; | |
1278 | ||
1279 | if (!br->ip4_querier.addr.u.ip4) | |
1280 | goto update; | |
1281 | ||
1282 | if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4)) | |
1283 | goto update; | |
1284 | ||
1285 | return false; | |
1286 | ||
1287 | update: | |
1288 | br->ip4_querier.addr.u.ip4 = saddr; | |
1289 | ||
2cd41431 LL |
1290 | /* update protected by general multicast_lock by caller */ |
1291 | rcu_assign_pointer(br->ip4_querier.port, port); | |
1292 | ||
dc4eb53a LL |
1293 | return true; |
1294 | } | |
1295 | ||
1296 | #if IS_ENABLED(CONFIG_IPV6) | |
1297 | static bool br_ip6_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1298 | struct net_bridge_port *port, |
dc4eb53a LL |
1299 | struct in6_addr *saddr) |
1300 | { | |
1301 | if (!timer_pending(&br->ip6_own_query.timer) && | |
1302 | !timer_pending(&br->ip6_other_query.timer)) | |
1303 | goto update; | |
1304 | ||
1305 | if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0) | |
1306 | goto update; | |
1307 | ||
1308 | return false; | |
1309 | ||
1310 | update: | |
1311 | br->ip6_querier.addr.u.ip6 = *saddr; | |
1312 | ||
2cd41431 LL |
1313 | /* update protected by general multicast_lock by caller */ |
1314 | rcu_assign_pointer(br->ip6_querier.port, port); | |
1315 | ||
dc4eb53a LL |
1316 | return true; |
1317 | } | |
1318 | #endif | |
1319 | ||
1320 | static bool br_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1321 | struct net_bridge_port *port, |
dc4eb53a LL |
1322 | struct br_ip *saddr) |
1323 | { | |
1324 | switch (saddr->proto) { | |
1325 | case htons(ETH_P_IP): | |
2cd41431 | 1326 | return br_ip4_multicast_select_querier(br, port, saddr->u.ip4); |
dc4eb53a LL |
1327 | #if IS_ENABLED(CONFIG_IPV6) |
1328 | case htons(ETH_P_IPV6): | |
2cd41431 | 1329 | return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6); |
dc4eb53a LL |
1330 | #endif |
1331 | } | |
1332 | ||
1333 | return false; | |
1334 | } | |
1335 | ||
cc0fdd80 | 1336 | static void |
90010b36 LL |
1337 | br_multicast_update_query_timer(struct net_bridge *br, |
1338 | struct bridge_mcast_other_query *query, | |
1339 | unsigned long max_delay) | |
b00589af | 1340 | { |
90010b36 LL |
1341 | if (!timer_pending(&query->timer)) |
1342 | query->delay_time = jiffies + max_delay; | |
b00589af | 1343 | |
90010b36 | 1344 | mod_timer(&query->timer, jiffies + br->multicast_querier_interval); |
b00589af LL |
1345 | } |
1346 | ||
6d549648 NF |
1347 | static void br_port_mc_router_state_change(struct net_bridge_port *p, |
1348 | bool is_mc_router) | |
1349 | { | |
1350 | struct switchdev_attr attr = { | |
1351 | .orig_dev = p->dev, | |
1352 | .id = SWITCHDEV_ATTR_ID_PORT_MROUTER, | |
1353 | .flags = SWITCHDEV_F_DEFER, | |
1354 | .u.mrouter = is_mc_router, | |
1355 | }; | |
1356 | ||
1357 | switchdev_port_attr_set(p->dev, &attr); | |
1358 | } | |
1359 | ||
7e80c124 | 1360 | /* |
7c77602f | 1361 | * Add port to router_list |
7e80c124 | 1362 | * list is maintained ordered by pointer value |
1363 | * and locked by br->multicast_lock and RCU | |
1364 | */ | |
0909e117 HX |
1365 | static void br_multicast_add_router(struct net_bridge *br, |
1366 | struct net_bridge_port *port) | |
1367 | { | |
dcdca2c4 | 1368 | struct net_bridge_port *p; |
b67bfe0d | 1369 | struct hlist_node *slot = NULL; |
dcdca2c4 | 1370 | |
1a040eac NA |
1371 | if (!hlist_unhashed(&port->rlist)) |
1372 | return; | |
1373 | ||
b67bfe0d | 1374 | hlist_for_each_entry(p, &br->router_list, rlist) { |
7e80c124 | 1375 | if ((unsigned long) port >= (unsigned long) p) |
1376 | break; | |
b67bfe0d | 1377 | slot = &p->rlist; |
dcdca2c4 | 1378 | } |
1379 | ||
7e80c124 | 1380 | if (slot) |
1d023284 | 1381 | hlist_add_behind_rcu(&port->rlist, slot); |
dcdca2c4 | 1382 | else |
1383 | hlist_add_head_rcu(&port->rlist, &br->router_list); | |
949f1e39 | 1384 | br_rtr_notify(br->dev, port, RTM_NEWMDB); |
6d549648 | 1385 | br_port_mc_router_state_change(port, true); |
0909e117 HX |
1386 | } |
1387 | ||
eb1d1641 HX |
1388 | static void br_multicast_mark_router(struct net_bridge *br, |
1389 | struct net_bridge_port *port) | |
1390 | { | |
1391 | unsigned long now = jiffies; | |
eb1d1641 HX |
1392 | |
1393 | if (!port) { | |
77041420 YG |
1394 | if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) { |
1395 | if (!timer_pending(&br->multicast_router_timer)) | |
1396 | br_mc_router_state_change(br, true); | |
eb1d1641 HX |
1397 | mod_timer(&br->multicast_router_timer, |
1398 | now + br->multicast_querier_interval); | |
77041420 | 1399 | } |
eb1d1641 HX |
1400 | return; |
1401 | } | |
1402 | ||
a55d8246 NA |
1403 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
1404 | port->multicast_router == MDB_RTR_TYPE_PERM) | |
eb1d1641 HX |
1405 | return; |
1406 | ||
0909e117 | 1407 | br_multicast_add_router(br, port); |
eb1d1641 | 1408 | |
eb1d1641 HX |
1409 | mod_timer(&port->multicast_router_timer, |
1410 | now + br->multicast_querier_interval); | |
1411 | } | |
1412 | ||
1413 | static void br_multicast_query_received(struct net_bridge *br, | |
1414 | struct net_bridge_port *port, | |
90010b36 | 1415 | struct bridge_mcast_other_query *query, |
dc4eb53a | 1416 | struct br_ip *saddr, |
b00589af | 1417 | unsigned long max_delay) |
eb1d1641 | 1418 | { |
2cd41431 | 1419 | if (!br_multicast_select_querier(br, port, saddr)) |
eb1d1641 HX |
1420 | return; |
1421 | ||
dc4eb53a | 1422 | br_multicast_update_query_timer(br, query, max_delay); |
eb1d1641 HX |
1423 | br_multicast_mark_router(br, port); |
1424 | } | |
1425 | ||
8ef2a9a5 YH |
1426 | static int br_ip4_multicast_query(struct net_bridge *br, |
1427 | struct net_bridge_port *port, | |
06499098 VY |
1428 | struct sk_buff *skb, |
1429 | u16 vid) | |
eb1d1641 | 1430 | { |
b71d1d42 | 1431 | const struct iphdr *iph = ip_hdr(skb); |
eb1d1641 HX |
1432 | struct igmphdr *ih = igmp_hdr(skb); |
1433 | struct net_bridge_mdb_entry *mp; | |
1434 | struct igmpv3_query *ih3; | |
1435 | struct net_bridge_port_group *p; | |
e8051688 | 1436 | struct net_bridge_port_group __rcu **pp; |
dc4eb53a | 1437 | struct br_ip saddr; |
eb1d1641 HX |
1438 | unsigned long max_delay; |
1439 | unsigned long now = jiffies; | |
856ce5d0 | 1440 | unsigned int offset = skb_transport_offset(skb); |
eb1d1641 | 1441 | __be32 group; |
bec68ff1 | 1442 | int err = 0; |
eb1d1641 HX |
1443 | |
1444 | spin_lock(&br->multicast_lock); | |
1445 | if (!netif_running(br->dev) || | |
1446 | (port && port->state == BR_STATE_DISABLED)) | |
1447 | goto out; | |
1448 | ||
eb1d1641 HX |
1449 | group = ih->group; |
1450 | ||
856ce5d0 | 1451 | if (skb->len == offset + sizeof(*ih)) { |
eb1d1641 HX |
1452 | max_delay = ih->code * (HZ / IGMP_TIMER_SCALE); |
1453 | ||
1454 | if (!max_delay) { | |
1455 | max_delay = 10 * HZ; | |
1456 | group = 0; | |
1457 | } | |
856ce5d0 | 1458 | } else if (skb->len >= offset + sizeof(*ih3)) { |
eb1d1641 HX |
1459 | ih3 = igmpv3_query_hdr(skb); |
1460 | if (ih3->nsrcs) | |
bec68ff1 | 1461 | goto out; |
eb1d1641 | 1462 | |
0ba8c9ec YH |
1463 | max_delay = ih3->code ? |
1464 | IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1; | |
9afd85c9 | 1465 | } else { |
9ed973cc LL |
1466 | goto out; |
1467 | } | |
1468 | ||
dc4eb53a LL |
1469 | if (!group) { |
1470 | saddr.proto = htons(ETH_P_IP); | |
1471 | saddr.u.ip4 = iph->saddr; | |
b00589af | 1472 | |
dc4eb53a LL |
1473 | br_multicast_query_received(br, port, &br->ip4_other_query, |
1474 | &saddr, max_delay); | |
eb1d1641 | 1475 | goto out; |
dc4eb53a | 1476 | } |
eb1d1641 | 1477 | |
b0e9a30d | 1478 | mp = br_mdb_ip4_get(mlock_dereference(br->mdb, br), group, vid); |
eb1d1641 HX |
1479 | if (!mp) |
1480 | goto out; | |
1481 | ||
1482 | max_delay *= br->multicast_last_member_count; | |
1483 | ||
ff0fd34e | 1484 | if (mp->host_joined && |
eb1d1641 HX |
1485 | (timer_pending(&mp->timer) ? |
1486 | time_after(mp->timer.expires, now + max_delay) : | |
1487 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1488 | mod_timer(&mp->timer, now + max_delay); | |
1489 | ||
e8051688 ED |
1490 | for (pp = &mp->ports; |
1491 | (p = mlock_dereference(*pp, br)) != NULL; | |
1492 | pp = &p->next) { | |
eb1d1641 HX |
1493 | if (timer_pending(&p->timer) ? |
1494 | time_after(p->timer.expires, now + max_delay) : | |
1495 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1496 | mod_timer(&p->timer, now + max_delay); |
eb1d1641 HX |
1497 | } |
1498 | ||
1499 | out: | |
1500 | spin_unlock(&br->multicast_lock); | |
bec68ff1 | 1501 | return err; |
eb1d1641 HX |
1502 | } |
1503 | ||
dfd56b8b | 1504 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1505 | static int br_ip6_multicast_query(struct net_bridge *br, |
1506 | struct net_bridge_port *port, | |
06499098 VY |
1507 | struct sk_buff *skb, |
1508 | u16 vid) | |
08b202b6 | 1509 | { |
b71d1d42 | 1510 | const struct ipv6hdr *ip6h = ipv6_hdr(skb); |
eca2a43b | 1511 | struct mld_msg *mld; |
08b202b6 YH |
1512 | struct net_bridge_mdb_entry *mp; |
1513 | struct mld2_query *mld2q; | |
e8051688 ED |
1514 | struct net_bridge_port_group *p; |
1515 | struct net_bridge_port_group __rcu **pp; | |
dc4eb53a | 1516 | struct br_ip saddr; |
08b202b6 YH |
1517 | unsigned long max_delay; |
1518 | unsigned long now = jiffies; | |
856ce5d0 | 1519 | unsigned int offset = skb_transport_offset(skb); |
b71d1d42 | 1520 | const struct in6_addr *group = NULL; |
9ed973cc | 1521 | bool is_general_query; |
08b202b6 YH |
1522 | int err = 0; |
1523 | ||
1524 | spin_lock(&br->multicast_lock); | |
1525 | if (!netif_running(br->dev) || | |
1526 | (port && port->state == BR_STATE_DISABLED)) | |
1527 | goto out; | |
1528 | ||
856ce5d0 LL |
1529 | if (skb->len == offset + sizeof(*mld)) { |
1530 | if (!pskb_may_pull(skb, offset + sizeof(*mld))) { | |
08b202b6 YH |
1531 | err = -EINVAL; |
1532 | goto out; | |
1533 | } | |
1534 | mld = (struct mld_msg *) icmp6_hdr(skb); | |
4715213d | 1535 | max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay)); |
08b202b6 YH |
1536 | if (max_delay) |
1537 | group = &mld->mld_mca; | |
248ba8ec | 1538 | } else { |
856ce5d0 | 1539 | if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) { |
08b202b6 YH |
1540 | err = -EINVAL; |
1541 | goto out; | |
1542 | } | |
1543 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
1544 | if (!mld2q->mld2q_nsrcs) | |
1545 | group = &mld2q->mld2q_mca; | |
e3f5b170 DB |
1546 | |
1547 | max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL); | |
08b202b6 YH |
1548 | } |
1549 | ||
9ed973cc LL |
1550 | is_general_query = group && ipv6_addr_any(group); |
1551 | ||
dc4eb53a LL |
1552 | if (is_general_query) { |
1553 | saddr.proto = htons(ETH_P_IPV6); | |
1554 | saddr.u.ip6 = ip6h->saddr; | |
b00589af | 1555 | |
dc4eb53a LL |
1556 | br_multicast_query_received(br, port, &br->ip6_other_query, |
1557 | &saddr, max_delay); | |
08b202b6 | 1558 | goto out; |
6c03ee8b LL |
1559 | } else if (!group) { |
1560 | goto out; | |
dc4eb53a | 1561 | } |
08b202b6 | 1562 | |
b0e9a30d | 1563 | mp = br_mdb_ip6_get(mlock_dereference(br->mdb, br), group, vid); |
08b202b6 YH |
1564 | if (!mp) |
1565 | goto out; | |
1566 | ||
1567 | max_delay *= br->multicast_last_member_count; | |
ff0fd34e | 1568 | if (mp->host_joined && |
08b202b6 YH |
1569 | (timer_pending(&mp->timer) ? |
1570 | time_after(mp->timer.expires, now + max_delay) : | |
1571 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1572 | mod_timer(&mp->timer, now + max_delay); | |
1573 | ||
e8051688 ED |
1574 | for (pp = &mp->ports; |
1575 | (p = mlock_dereference(*pp, br)) != NULL; | |
1576 | pp = &p->next) { | |
08b202b6 YH |
1577 | if (timer_pending(&p->timer) ? |
1578 | time_after(p->timer.expires, now + max_delay) : | |
1579 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1580 | mod_timer(&p->timer, now + max_delay); |
08b202b6 YH |
1581 | } |
1582 | ||
1583 | out: | |
1584 | spin_unlock(&br->multicast_lock); | |
1585 | return err; | |
1586 | } | |
1587 | #endif | |
1588 | ||
90010b36 LL |
1589 | static void |
1590 | br_multicast_leave_group(struct net_bridge *br, | |
1591 | struct net_bridge_port *port, | |
1592 | struct br_ip *group, | |
1593 | struct bridge_mcast_other_query *other_query, | |
6db6f0ea FF |
1594 | struct bridge_mcast_own_query *own_query, |
1595 | const unsigned char *src) | |
eb1d1641 HX |
1596 | { |
1597 | struct net_bridge_mdb_htable *mdb; | |
1598 | struct net_bridge_mdb_entry *mp; | |
1599 | struct net_bridge_port_group *p; | |
1600 | unsigned long now; | |
1601 | unsigned long time; | |
1602 | ||
eb1d1641 HX |
1603 | spin_lock(&br->multicast_lock); |
1604 | if (!netif_running(br->dev) || | |
544586f7 | 1605 | (port && port->state == BR_STATE_DISABLED)) |
eb1d1641 HX |
1606 | goto out; |
1607 | ||
e8051688 | 1608 | mdb = mlock_dereference(br->mdb, br); |
eb1d1641 HX |
1609 | mp = br_mdb_ip_get(mdb, group); |
1610 | if (!mp) | |
1611 | goto out; | |
1612 | ||
544586f7 SA |
1613 | if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) { |
1614 | struct net_bridge_port_group __rcu **pp; | |
1615 | ||
1616 | for (pp = &mp->ports; | |
1617 | (p = mlock_dereference(*pp, br)) != NULL; | |
1618 | pp = &p->next) { | |
6db6f0ea | 1619 | if (!br_port_group_equal(p, port, src)) |
544586f7 SA |
1620 | continue; |
1621 | ||
1622 | rcu_assign_pointer(*pp, p->next); | |
1623 | hlist_del_init(&p->mglist); | |
1624 | del_timer(&p->timer); | |
1625 | call_rcu_bh(&p->rcu, br_multicast_free_pg); | |
45ebcce5 ER |
1626 | br_mdb_notify(br->dev, port, group, RTM_DELMDB, |
1627 | p->flags); | |
544586f7 | 1628 | |
ff0fd34e | 1629 | if (!mp->ports && !mp->host_joined && |
544586f7 SA |
1630 | netif_running(br->dev)) |
1631 | mod_timer(&mp->timer, jiffies); | |
1632 | } | |
1633 | goto out; | |
1634 | } | |
1635 | ||
1636 | if (timer_pending(&other_query->timer)) | |
1637 | goto out; | |
1638 | ||
cc0fdd80 | 1639 | if (br->multicast_querier) { |
6b7df111 CW |
1640 | __br_multicast_send_query(br, port, &mp->addr); |
1641 | ||
1642 | time = jiffies + br->multicast_last_member_count * | |
1643 | br->multicast_last_member_interval; | |
cc0fdd80 | 1644 | |
90010b36 | 1645 | mod_timer(&own_query->timer, time); |
6b7df111 CW |
1646 | |
1647 | for (p = mlock_dereference(mp->ports, br); | |
1648 | p != NULL; | |
1649 | p = mlock_dereference(p->next, br)) { | |
6db6f0ea | 1650 | if (!br_port_group_equal(p, port, src)) |
6b7df111 CW |
1651 | continue; |
1652 | ||
1653 | if (!hlist_unhashed(&p->mglist) && | |
1654 | (timer_pending(&p->timer) ? | |
1655 | time_after(p->timer.expires, time) : | |
1656 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1657 | mod_timer(&p->timer, time); | |
1658 | } | |
1659 | ||
1660 | break; | |
1661 | } | |
1662 | } | |
1663 | ||
eb1d1641 HX |
1664 | now = jiffies; |
1665 | time = now + br->multicast_last_member_count * | |
1666 | br->multicast_last_member_interval; | |
1667 | ||
1668 | if (!port) { | |
ff0fd34e | 1669 | if (mp->host_joined && |
eb1d1641 HX |
1670 | (timer_pending(&mp->timer) ? |
1671 | time_after(mp->timer.expires, time) : | |
1672 | try_to_del_timer_sync(&mp->timer) >= 0)) { | |
1673 | mod_timer(&mp->timer, time); | |
eb1d1641 | 1674 | } |
454594f3 LL |
1675 | |
1676 | goto out; | |
1677 | } | |
1678 | ||
1679 | for (p = mlock_dereference(mp->ports, br); | |
1680 | p != NULL; | |
1681 | p = mlock_dereference(p->next, br)) { | |
1682 | if (p->port != port) | |
1683 | continue; | |
1684 | ||
1685 | if (!hlist_unhashed(&p->mglist) && | |
1686 | (timer_pending(&p->timer) ? | |
1687 | time_after(p->timer.expires, time) : | |
1688 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1689 | mod_timer(&p->timer, time); | |
1690 | } | |
1691 | ||
1692 | break; | |
eb1d1641 | 1693 | } |
eb1d1641 HX |
1694 | out: |
1695 | spin_unlock(&br->multicast_lock); | |
1696 | } | |
1697 | ||
8ef2a9a5 YH |
1698 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
1699 | struct net_bridge_port *port, | |
b0e9a30d | 1700 | __be32 group, |
6db6f0ea FF |
1701 | __u16 vid, |
1702 | const unsigned char *src) | |
8ef2a9a5 YH |
1703 | { |
1704 | struct br_ip br_group; | |
90010b36 | 1705 | struct bridge_mcast_own_query *own_query; |
8ef2a9a5 YH |
1706 | |
1707 | if (ipv4_is_local_multicast(group)) | |
1708 | return; | |
1709 | ||
90010b36 LL |
1710 | own_query = port ? &port->ip4_own_query : &br->ip4_own_query; |
1711 | ||
8ef2a9a5 YH |
1712 | br_group.u.ip4 = group; |
1713 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 1714 | br_group.vid = vid; |
8ef2a9a5 | 1715 | |
90010b36 | 1716 | br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query, |
6db6f0ea | 1717 | own_query, src); |
8ef2a9a5 YH |
1718 | } |
1719 | ||
dfd56b8b | 1720 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1721 | static void br_ip6_multicast_leave_group(struct net_bridge *br, |
1722 | struct net_bridge_port *port, | |
b0e9a30d | 1723 | const struct in6_addr *group, |
6db6f0ea FF |
1724 | __u16 vid, |
1725 | const unsigned char *src) | |
08b202b6 YH |
1726 | { |
1727 | struct br_ip br_group; | |
90010b36 | 1728 | struct bridge_mcast_own_query *own_query; |
08b202b6 | 1729 | |
3c3769e6 | 1730 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
1731 | return; |
1732 | ||
90010b36 LL |
1733 | own_query = port ? &port->ip6_own_query : &br->ip6_own_query; |
1734 | ||
4e3fd7a0 | 1735 | br_group.u.ip6 = *group; |
08b202b6 | 1736 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 1737 | br_group.vid = vid; |
08b202b6 | 1738 | |
90010b36 | 1739 | br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query, |
6db6f0ea | 1740 | own_query, src); |
08b202b6 YH |
1741 | } |
1742 | #endif | |
8ef2a9a5 | 1743 | |
1080ab95 NA |
1744 | static void br_multicast_err_count(const struct net_bridge *br, |
1745 | const struct net_bridge_port *p, | |
1746 | __be16 proto) | |
1747 | { | |
1748 | struct bridge_mcast_stats __percpu *stats; | |
1749 | struct bridge_mcast_stats *pstats; | |
1750 | ||
1751 | if (!br->multicast_stats_enabled) | |
1752 | return; | |
1753 | ||
1754 | if (p) | |
1755 | stats = p->mcast_stats; | |
1756 | else | |
1757 | stats = br->mcast_stats; | |
1758 | if (WARN_ON(!stats)) | |
1759 | return; | |
1760 | ||
1761 | pstats = this_cpu_ptr(stats); | |
1762 | ||
1763 | u64_stats_update_begin(&pstats->syncp); | |
1764 | switch (proto) { | |
1765 | case htons(ETH_P_IP): | |
1766 | pstats->mstats.igmp_parse_errors++; | |
1767 | break; | |
1768 | #if IS_ENABLED(CONFIG_IPV6) | |
1769 | case htons(ETH_P_IPV6): | |
1770 | pstats->mstats.mld_parse_errors++; | |
1771 | break; | |
1772 | #endif | |
1773 | } | |
1774 | u64_stats_update_end(&pstats->syncp); | |
1775 | } | |
1776 | ||
91b02d3d NA |
1777 | static void br_multicast_pim(struct net_bridge *br, |
1778 | struct net_bridge_port *port, | |
1779 | const struct sk_buff *skb) | |
1780 | { | |
1781 | unsigned int offset = skb_transport_offset(skb); | |
1782 | struct pimhdr *pimhdr, _pimhdr; | |
1783 | ||
1784 | pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr); | |
1785 | if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION || | |
1786 | pim_hdr_type(pimhdr) != PIM_TYPE_HELLO) | |
1787 | return; | |
1788 | ||
1789 | br_multicast_mark_router(br, port); | |
1790 | } | |
1791 | ||
eb1d1641 HX |
1792 | static int br_multicast_ipv4_rcv(struct net_bridge *br, |
1793 | struct net_bridge_port *port, | |
06499098 VY |
1794 | struct sk_buff *skb, |
1795 | u16 vid) | |
eb1d1641 | 1796 | { |
9afd85c9 | 1797 | struct sk_buff *skb_trimmed = NULL; |
6db6f0ea | 1798 | const unsigned char *src; |
eb1d1641 | 1799 | struct igmphdr *ih; |
eb1d1641 HX |
1800 | int err; |
1801 | ||
9afd85c9 | 1802 | err = ip_mc_check_igmp(skb, &skb_trimmed); |
eb1d1641 | 1803 | |
9afd85c9 | 1804 | if (err == -ENOMSG) { |
91b02d3d | 1805 | if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) { |
bd4265fe | 1806 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
91b02d3d NA |
1807 | } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) { |
1808 | if (ip_hdr(skb)->protocol == IPPROTO_PIM) | |
1809 | br_multicast_pim(br, port, skb); | |
1810 | } | |
eb1d1641 | 1811 | return 0; |
9afd85c9 | 1812 | } else if (err < 0) { |
1080ab95 | 1813 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1814 | return err; |
bd4265fe | 1815 | } |
eb1d1641 | 1816 | |
9afd85c9 | 1817 | ih = igmp_hdr(skb); |
6db6f0ea | 1818 | src = eth_hdr(skb)->h_source; |
1080ab95 | 1819 | BR_INPUT_SKB_CB(skb)->igmp = ih->type; |
eb1d1641 HX |
1820 | |
1821 | switch (ih->type) { | |
1822 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
1823 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
62b2bcb4 | 1824 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
6db6f0ea | 1825 | err = br_ip4_multicast_add_group(br, port, ih->group, vid, src); |
eb1d1641 HX |
1826 | break; |
1827 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
9afd85c9 | 1828 | err = br_ip4_multicast_igmp3_report(br, port, skb_trimmed, vid); |
eb1d1641 HX |
1829 | break; |
1830 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
9afd85c9 | 1831 | err = br_ip4_multicast_query(br, port, skb_trimmed, vid); |
eb1d1641 HX |
1832 | break; |
1833 | case IGMP_HOST_LEAVE_MESSAGE: | |
6db6f0ea | 1834 | br_ip4_multicast_leave_group(br, port, ih->group, vid, src); |
eb1d1641 HX |
1835 | break; |
1836 | } | |
1837 | ||
a516993f | 1838 | if (skb_trimmed && skb_trimmed != skb) |
9afd85c9 LL |
1839 | kfree_skb(skb_trimmed); |
1840 | ||
a65056ec | 1841 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1842 | BR_MCAST_DIR_RX); |
1843 | ||
eb1d1641 HX |
1844 | return err; |
1845 | } | |
1846 | ||
dfd56b8b | 1847 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1848 | static int br_multicast_ipv6_rcv(struct net_bridge *br, |
1849 | struct net_bridge_port *port, | |
06499098 VY |
1850 | struct sk_buff *skb, |
1851 | u16 vid) | |
08b202b6 | 1852 | { |
9afd85c9 | 1853 | struct sk_buff *skb_trimmed = NULL; |
6db6f0ea | 1854 | const unsigned char *src; |
9afd85c9 | 1855 | struct mld_msg *mld; |
08b202b6 YH |
1856 | int err; |
1857 | ||
9afd85c9 | 1858 | err = ipv6_mc_check_mld(skb, &skb_trimmed); |
08b202b6 | 1859 | |
9afd85c9 LL |
1860 | if (err == -ENOMSG) { |
1861 | if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr)) | |
1862 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
08b202b6 | 1863 | return 0; |
9afd85c9 | 1864 | } else if (err < 0) { |
1080ab95 | 1865 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1866 | return err; |
08b202b6 YH |
1867 | } |
1868 | ||
9afd85c9 | 1869 | mld = (struct mld_msg *)skb_transport_header(skb); |
1080ab95 | 1870 | BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type; |
08b202b6 | 1871 | |
9afd85c9 | 1872 | switch (mld->mld_type) { |
08b202b6 | 1873 | case ICMPV6_MGM_REPORT: |
6db6f0ea | 1874 | src = eth_hdr(skb)->h_source; |
fc2af6c7 | 1875 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
6db6f0ea FF |
1876 | err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid, |
1877 | src); | |
08b202b6 | 1878 | break; |
08b202b6 | 1879 | case ICMPV6_MLD2_REPORT: |
9afd85c9 | 1880 | err = br_ip6_multicast_mld2_report(br, port, skb_trimmed, vid); |
08b202b6 YH |
1881 | break; |
1882 | case ICMPV6_MGM_QUERY: | |
9afd85c9 | 1883 | err = br_ip6_multicast_query(br, port, skb_trimmed, vid); |
08b202b6 YH |
1884 | break; |
1885 | case ICMPV6_MGM_REDUCTION: | |
6db6f0ea FF |
1886 | src = eth_hdr(skb)->h_source; |
1887 | br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src); | |
9afd85c9 | 1888 | break; |
08b202b6 YH |
1889 | } |
1890 | ||
a516993f | 1891 | if (skb_trimmed && skb_trimmed != skb) |
9afd85c9 LL |
1892 | kfree_skb(skb_trimmed); |
1893 | ||
a65056ec | 1894 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1895 | BR_MCAST_DIR_RX); |
1896 | ||
08b202b6 YH |
1897 | return err; |
1898 | } | |
1899 | #endif | |
1900 | ||
eb1d1641 | 1901 | int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, |
06499098 | 1902 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 1903 | { |
1080ab95 NA |
1904 | int ret = 0; |
1905 | ||
1fafc7a9 YH |
1906 | BR_INPUT_SKB_CB(skb)->igmp = 0; |
1907 | BR_INPUT_SKB_CB(skb)->mrouters_only = 0; | |
1908 | ||
eb1d1641 HX |
1909 | if (br->multicast_disabled) |
1910 | return 0; | |
1911 | ||
1912 | switch (skb->protocol) { | |
1913 | case htons(ETH_P_IP): | |
1080ab95 NA |
1914 | ret = br_multicast_ipv4_rcv(br, port, skb, vid); |
1915 | break; | |
dfd56b8b | 1916 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 1917 | case htons(ETH_P_IPV6): |
1080ab95 NA |
1918 | ret = br_multicast_ipv6_rcv(br, port, skb, vid); |
1919 | break; | |
08b202b6 | 1920 | #endif |
eb1d1641 HX |
1921 | } |
1922 | ||
1080ab95 | 1923 | return ret; |
eb1d1641 HX |
1924 | } |
1925 | ||
cc0fdd80 | 1926 | static void br_multicast_query_expired(struct net_bridge *br, |
2cd41431 LL |
1927 | struct bridge_mcast_own_query *query, |
1928 | struct bridge_mcast_querier *querier) | |
cc0fdd80 LL |
1929 | { |
1930 | spin_lock(&br->multicast_lock); | |
1931 | if (query->startup_sent < br->multicast_startup_query_count) | |
1932 | query->startup_sent++; | |
1933 | ||
71d9f614 | 1934 | RCU_INIT_POINTER(querier->port, NULL); |
cc0fdd80 LL |
1935 | br_multicast_send_query(br, NULL, query); |
1936 | spin_unlock(&br->multicast_lock); | |
1937 | } | |
1938 | ||
88c1f37f | 1939 | static void br_ip4_multicast_query_expired(struct timer_list *t) |
eb1d1641 | 1940 | { |
88c1f37f | 1941 | struct net_bridge *br = from_timer(br, t, ip4_own_query.timer); |
eb1d1641 | 1942 | |
2cd41431 | 1943 | br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier); |
cc0fdd80 | 1944 | } |
eb1d1641 | 1945 | |
cc0fdd80 | 1946 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f | 1947 | static void br_ip6_multicast_query_expired(struct timer_list *t) |
cc0fdd80 | 1948 | { |
88c1f37f | 1949 | struct net_bridge *br = from_timer(br, t, ip6_own_query.timer); |
eb1d1641 | 1950 | |
2cd41431 | 1951 | br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier); |
eb1d1641 | 1952 | } |
cc0fdd80 | 1953 | #endif |
eb1d1641 HX |
1954 | |
1955 | void br_multicast_init(struct net_bridge *br) | |
1956 | { | |
1957 | br->hash_elasticity = 4; | |
1958 | br->hash_max = 512; | |
1959 | ||
7f0aec7a | 1960 | br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
c5c23260 | 1961 | br->multicast_querier = 0; |
1c8ad5bf | 1962 | br->multicast_query_use_ifaddr = 0; |
eb1d1641 HX |
1963 | br->multicast_last_member_count = 2; |
1964 | br->multicast_startup_query_count = 2; | |
1965 | ||
1966 | br->multicast_last_member_interval = HZ; | |
1967 | br->multicast_query_response_interval = 10 * HZ; | |
1968 | br->multicast_startup_query_interval = 125 * HZ / 4; | |
1969 | br->multicast_query_interval = 125 * HZ; | |
1970 | br->multicast_querier_interval = 255 * HZ; | |
1971 | br->multicast_membership_interval = 260 * HZ; | |
1972 | ||
90010b36 | 1973 | br->ip4_other_query.delay_time = 0; |
2cd41431 | 1974 | br->ip4_querier.port = NULL; |
aa2ae3e7 | 1975 | br->multicast_igmp_version = 2; |
cc0fdd80 | 1976 | #if IS_ENABLED(CONFIG_IPV6) |
aa2ae3e7 | 1977 | br->multicast_mld_version = 1; |
90010b36 | 1978 | br->ip6_other_query.delay_time = 0; |
2cd41431 | 1979 | br->ip6_querier.port = NULL; |
cc0fdd80 | 1980 | #endif |
0888d5f3 | 1981 | br->has_ipv6_addr = 1; |
b00589af | 1982 | |
eb1d1641 | 1983 | spin_lock_init(&br->multicast_lock); |
88c1f37f AP |
1984 | timer_setup(&br->multicast_router_timer, |
1985 | br_multicast_local_router_expired, 0); | |
1986 | timer_setup(&br->ip4_other_query.timer, | |
1987 | br_ip4_multicast_querier_expired, 0); | |
1988 | timer_setup(&br->ip4_own_query.timer, | |
1989 | br_ip4_multicast_query_expired, 0); | |
cc0fdd80 | 1990 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f AP |
1991 | timer_setup(&br->ip6_other_query.timer, |
1992 | br_ip6_multicast_querier_expired, 0); | |
1993 | timer_setup(&br->ip6_own_query.timer, | |
1994 | br_ip6_multicast_query_expired, 0); | |
cc0fdd80 | 1995 | #endif |
eb1d1641 HX |
1996 | } |
1997 | ||
cc0fdd80 | 1998 | static void __br_multicast_open(struct net_bridge *br, |
90010b36 | 1999 | struct bridge_mcast_own_query *query) |
eb1d1641 | 2000 | { |
cc0fdd80 | 2001 | query->startup_sent = 0; |
eb1d1641 HX |
2002 | |
2003 | if (br->multicast_disabled) | |
2004 | return; | |
2005 | ||
cc0fdd80 LL |
2006 | mod_timer(&query->timer, jiffies); |
2007 | } | |
2008 | ||
2009 | void br_multicast_open(struct net_bridge *br) | |
2010 | { | |
90010b36 | 2011 | __br_multicast_open(br, &br->ip4_own_query); |
cc0fdd80 | 2012 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 2013 | __br_multicast_open(br, &br->ip6_own_query); |
cc0fdd80 | 2014 | #endif |
eb1d1641 HX |
2015 | } |
2016 | ||
2017 | void br_multicast_stop(struct net_bridge *br) | |
2018 | { | |
eb1d1641 | 2019 | del_timer_sync(&br->multicast_router_timer); |
90010b36 LL |
2020 | del_timer_sync(&br->ip4_other_query.timer); |
2021 | del_timer_sync(&br->ip4_own_query.timer); | |
cc0fdd80 | 2022 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 LL |
2023 | del_timer_sync(&br->ip6_other_query.timer); |
2024 | del_timer_sync(&br->ip6_own_query.timer); | |
cc0fdd80 | 2025 | #endif |
e10177ab SA |
2026 | } |
2027 | ||
2028 | void br_multicast_dev_del(struct net_bridge *br) | |
2029 | { | |
2030 | struct net_bridge_mdb_htable *mdb; | |
2031 | struct net_bridge_mdb_entry *mp; | |
2032 | struct hlist_node *n; | |
2033 | u32 ver; | |
2034 | int i; | |
eb1d1641 HX |
2035 | |
2036 | spin_lock_bh(&br->multicast_lock); | |
e8051688 | 2037 | mdb = mlock_dereference(br->mdb, br); |
eb1d1641 HX |
2038 | if (!mdb) |
2039 | goto out; | |
2040 | ||
2041 | br->mdb = NULL; | |
2042 | ||
2043 | ver = mdb->ver; | |
2044 | for (i = 0; i < mdb->max; i++) { | |
b67bfe0d | 2045 | hlist_for_each_entry_safe(mp, n, &mdb->mhash[i], |
eb1d1641 HX |
2046 | hlist[ver]) { |
2047 | del_timer(&mp->timer); | |
eb1d1641 HX |
2048 | call_rcu_bh(&mp->rcu, br_multicast_free_group); |
2049 | } | |
2050 | } | |
2051 | ||
2052 | if (mdb->old) { | |
2053 | spin_unlock_bh(&br->multicast_lock); | |
10cc2b50 | 2054 | rcu_barrier_bh(); |
eb1d1641 HX |
2055 | spin_lock_bh(&br->multicast_lock); |
2056 | WARN_ON(mdb->old); | |
2057 | } | |
2058 | ||
2059 | mdb->old = mdb; | |
2060 | call_rcu_bh(&mdb->rcu, br_mdb_free); | |
2061 | ||
2062 | out: | |
2063 | spin_unlock_bh(&br->multicast_lock); | |
2064 | } | |
0909e117 HX |
2065 | |
2066 | int br_multicast_set_router(struct net_bridge *br, unsigned long val) | |
2067 | { | |
6ae4ae8e | 2068 | int err = -EINVAL; |
0909e117 HX |
2069 | |
2070 | spin_lock_bh(&br->multicast_lock); | |
0909e117 HX |
2071 | |
2072 | switch (val) { | |
7f0aec7a NA |
2073 | case MDB_RTR_TYPE_DISABLED: |
2074 | case MDB_RTR_TYPE_PERM: | |
77041420 | 2075 | br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM); |
0909e117 | 2076 | del_timer(&br->multicast_router_timer); |
77041420 YG |
2077 | br->multicast_router = val; |
2078 | err = 0; | |
2079 | break; | |
7f0aec7a | 2080 | case MDB_RTR_TYPE_TEMP_QUERY: |
77041420 YG |
2081 | if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY) |
2082 | br_mc_router_state_change(br, false); | |
0909e117 HX |
2083 | br->multicast_router = val; |
2084 | err = 0; | |
2085 | break; | |
0909e117 HX |
2086 | } |
2087 | ||
0909e117 HX |
2088 | spin_unlock_bh(&br->multicast_lock); |
2089 | ||
2090 | return err; | |
2091 | } | |
2092 | ||
7f0aec7a NA |
2093 | static void __del_port_router(struct net_bridge_port *p) |
2094 | { | |
2095 | if (hlist_unhashed(&p->rlist)) | |
2096 | return; | |
2097 | hlist_del_init_rcu(&p->rlist); | |
2098 | br_rtr_notify(p->br->dev, p, RTM_DELMDB); | |
6d549648 | 2099 | br_port_mc_router_state_change(p, false); |
f12e7d95 NF |
2100 | |
2101 | /* don't allow timer refresh */ | |
2102 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
2103 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
7f0aec7a NA |
2104 | } |
2105 | ||
0909e117 HX |
2106 | int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val) |
2107 | { | |
2108 | struct net_bridge *br = p->br; | |
a55d8246 | 2109 | unsigned long now = jiffies; |
6ae4ae8e | 2110 | int err = -EINVAL; |
0909e117 HX |
2111 | |
2112 | spin_lock(&br->multicast_lock); | |
4950cfd1 | 2113 | if (p->multicast_router == val) { |
a55d8246 NA |
2114 | /* Refresh the temp router port timer */ |
2115 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
2116 | mod_timer(&p->multicast_router_timer, | |
2117 | now + br->multicast_querier_interval); | |
4950cfd1 NA |
2118 | err = 0; |
2119 | goto unlock; | |
2120 | } | |
0909e117 | 2121 | switch (val) { |
7f0aec7a NA |
2122 | case MDB_RTR_TYPE_DISABLED: |
2123 | p->multicast_router = MDB_RTR_TYPE_DISABLED; | |
2124 | __del_port_router(p); | |
2125 | del_timer(&p->multicast_router_timer); | |
2126 | break; | |
2127 | case MDB_RTR_TYPE_TEMP_QUERY: | |
2128 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
2129 | __del_port_router(p); | |
2130 | break; | |
2131 | case MDB_RTR_TYPE_PERM: | |
2132 | p->multicast_router = MDB_RTR_TYPE_PERM; | |
0909e117 | 2133 | del_timer(&p->multicast_router_timer); |
0909e117 HX |
2134 | br_multicast_add_router(br, p); |
2135 | break; | |
a55d8246 NA |
2136 | case MDB_RTR_TYPE_TEMP: |
2137 | p->multicast_router = MDB_RTR_TYPE_TEMP; | |
2138 | br_multicast_mark_router(br, p); | |
2139 | break; | |
7f0aec7a NA |
2140 | default: |
2141 | goto unlock; | |
0909e117 | 2142 | } |
7f0aec7a NA |
2143 | err = 0; |
2144 | unlock: | |
0909e117 HX |
2145 | spin_unlock(&br->multicast_lock); |
2146 | ||
2147 | return err; | |
2148 | } | |
561f1103 | 2149 | |
cc0fdd80 | 2150 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 2151 | struct bridge_mcast_own_query *query) |
561f1103 HX |
2152 | { |
2153 | struct net_bridge_port *port; | |
74857216 | 2154 | |
cc0fdd80 | 2155 | __br_multicast_open(br, query); |
74857216 HX |
2156 | |
2157 | list_for_each_entry(port, &br->port_list, list) { | |
2158 | if (port->state == BR_STATE_DISABLED || | |
2159 | port->state == BR_STATE_BLOCKING) | |
2160 | continue; | |
2161 | ||
90010b36 LL |
2162 | if (query == &br->ip4_own_query) |
2163 | br_multicast_enable(&port->ip4_own_query); | |
cc0fdd80 LL |
2164 | #if IS_ENABLED(CONFIG_IPV6) |
2165 | else | |
90010b36 | 2166 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 2167 | #endif |
74857216 HX |
2168 | } |
2169 | } | |
2170 | ||
2171 | int br_multicast_toggle(struct net_bridge *br, unsigned long val) | |
2172 | { | |
e8051688 | 2173 | struct net_bridge_mdb_htable *mdb; |
7cb3f921 NA |
2174 | struct net_bridge_port *port; |
2175 | int err = 0; | |
561f1103 | 2176 | |
ef5e0d82 | 2177 | spin_lock_bh(&br->multicast_lock); |
561f1103 HX |
2178 | if (br->multicast_disabled == !val) |
2179 | goto unlock; | |
2180 | ||
147c1e9b | 2181 | br_mc_disabled_update(br->dev, !val); |
561f1103 HX |
2182 | br->multicast_disabled = !val; |
2183 | if (br->multicast_disabled) | |
2184 | goto unlock; | |
2185 | ||
3a7fda06 HX |
2186 | if (!netif_running(br->dev)) |
2187 | goto unlock; | |
2188 | ||
e8051688 ED |
2189 | mdb = mlock_dereference(br->mdb, br); |
2190 | if (mdb) { | |
2191 | if (mdb->old) { | |
561f1103 HX |
2192 | err = -EEXIST; |
2193 | rollback: | |
2194 | br->multicast_disabled = !!val; | |
2195 | goto unlock; | |
2196 | } | |
2197 | ||
e8051688 | 2198 | err = br_mdb_rehash(&br->mdb, mdb->max, |
561f1103 HX |
2199 | br->hash_elasticity); |
2200 | if (err) | |
2201 | goto rollback; | |
2202 | } | |
2203 | ||
7cb3f921 NA |
2204 | br_multicast_open(br); |
2205 | list_for_each_entry(port, &br->port_list, list) | |
2206 | __br_multicast_enable_port(port); | |
561f1103 HX |
2207 | |
2208 | unlock: | |
ef5e0d82 | 2209 | spin_unlock_bh(&br->multicast_lock); |
561f1103 HX |
2210 | |
2211 | return err; | |
2212 | } | |
b195167f | 2213 | |
9341b988 IS |
2214 | bool br_multicast_enabled(const struct net_device *dev) |
2215 | { | |
2216 | struct net_bridge *br = netdev_priv(dev); | |
2217 | ||
2218 | return !br->multicast_disabled; | |
2219 | } | |
2220 | EXPORT_SYMBOL_GPL(br_multicast_enabled); | |
2221 | ||
0912bda4 YG |
2222 | bool br_multicast_router(const struct net_device *dev) |
2223 | { | |
2224 | struct net_bridge *br = netdev_priv(dev); | |
2225 | bool is_router; | |
2226 | ||
2227 | spin_lock_bh(&br->multicast_lock); | |
2228 | is_router = br_multicast_is_router(br); | |
2229 | spin_unlock_bh(&br->multicast_lock); | |
2230 | return is_router; | |
2231 | } | |
2232 | EXPORT_SYMBOL_GPL(br_multicast_router); | |
2233 | ||
c5c23260 HX |
2234 | int br_multicast_set_querier(struct net_bridge *br, unsigned long val) |
2235 | { | |
b00589af LL |
2236 | unsigned long max_delay; |
2237 | ||
c5c23260 HX |
2238 | val = !!val; |
2239 | ||
2240 | spin_lock_bh(&br->multicast_lock); | |
2241 | if (br->multicast_querier == val) | |
2242 | goto unlock; | |
2243 | ||
2244 | br->multicast_querier = val; | |
b00589af LL |
2245 | if (!val) |
2246 | goto unlock; | |
2247 | ||
2248 | max_delay = br->multicast_query_response_interval; | |
b00589af | 2249 | |
90010b36 LL |
2250 | if (!timer_pending(&br->ip4_other_query.timer)) |
2251 | br->ip4_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2252 | |
90010b36 | 2253 | br_multicast_start_querier(br, &br->ip4_own_query); |
cc0fdd80 LL |
2254 | |
2255 | #if IS_ENABLED(CONFIG_IPV6) | |
90010b36 LL |
2256 | if (!timer_pending(&br->ip6_other_query.timer)) |
2257 | br->ip6_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2258 | |
90010b36 | 2259 | br_multicast_start_querier(br, &br->ip6_own_query); |
cc0fdd80 | 2260 | #endif |
c5c23260 HX |
2261 | |
2262 | unlock: | |
2263 | spin_unlock_bh(&br->multicast_lock); | |
2264 | ||
2265 | return 0; | |
2266 | } | |
2267 | ||
b195167f HX |
2268 | int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val) |
2269 | { | |
6ae4ae8e | 2270 | int err = -EINVAL; |
b195167f | 2271 | u32 old; |
e8051688 | 2272 | struct net_bridge_mdb_htable *mdb; |
b195167f | 2273 | |
fe0d692b | 2274 | spin_lock_bh(&br->multicast_lock); |
b195167f HX |
2275 | if (!is_power_of_2(val)) |
2276 | goto unlock; | |
e8051688 ED |
2277 | |
2278 | mdb = mlock_dereference(br->mdb, br); | |
2279 | if (mdb && val < mdb->size) | |
b195167f HX |
2280 | goto unlock; |
2281 | ||
2282 | err = 0; | |
2283 | ||
2284 | old = br->hash_max; | |
2285 | br->hash_max = val; | |
2286 | ||
e8051688 ED |
2287 | if (mdb) { |
2288 | if (mdb->old) { | |
b195167f HX |
2289 | err = -EEXIST; |
2290 | rollback: | |
2291 | br->hash_max = old; | |
2292 | goto unlock; | |
2293 | } | |
2294 | ||
2295 | err = br_mdb_rehash(&br->mdb, br->hash_max, | |
2296 | br->hash_elasticity); | |
2297 | if (err) | |
2298 | goto rollback; | |
2299 | } | |
2300 | ||
2301 | unlock: | |
fe0d692b | 2302 | spin_unlock_bh(&br->multicast_lock); |
b195167f HX |
2303 | |
2304 | return err; | |
2305 | } | |
07f8ac4a | 2306 | |
5e923585 NA |
2307 | int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val) |
2308 | { | |
2309 | /* Currently we support only version 2 and 3 */ | |
2310 | switch (val) { | |
2311 | case 2: | |
2312 | case 3: | |
2313 | break; | |
2314 | default: | |
2315 | return -EINVAL; | |
2316 | } | |
2317 | ||
2318 | spin_lock_bh(&br->multicast_lock); | |
2319 | br->multicast_igmp_version = val; | |
2320 | spin_unlock_bh(&br->multicast_lock); | |
2321 | ||
2322 | return 0; | |
2323 | } | |
2324 | ||
aa2ae3e7 NA |
2325 | #if IS_ENABLED(CONFIG_IPV6) |
2326 | int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val) | |
2327 | { | |
2328 | /* Currently we support version 1 and 2 */ | |
2329 | switch (val) { | |
2330 | case 1: | |
2331 | case 2: | |
2332 | break; | |
2333 | default: | |
2334 | return -EINVAL; | |
2335 | } | |
2336 | ||
2337 | spin_lock_bh(&br->multicast_lock); | |
2338 | br->multicast_mld_version = val; | |
2339 | spin_unlock_bh(&br->multicast_lock); | |
2340 | ||
2341 | return 0; | |
2342 | } | |
2343 | #endif | |
2344 | ||
07f8ac4a LL |
2345 | /** |
2346 | * br_multicast_list_adjacent - Returns snooped multicast addresses | |
2347 | * @dev: The bridge port adjacent to which to retrieve addresses | |
2348 | * @br_ip_list: The list to store found, snooped multicast IP addresses in | |
2349 | * | |
2350 | * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast | |
2351 | * snooping feature on all bridge ports of dev's bridge device, excluding | |
2352 | * the addresses from dev itself. | |
2353 | * | |
2354 | * Returns the number of items added to br_ip_list. | |
2355 | * | |
2356 | * Notes: | |
2357 | * - br_ip_list needs to be initialized by caller | |
2358 | * - br_ip_list might contain duplicates in the end | |
2359 | * (needs to be taken care of by caller) | |
2360 | * - br_ip_list needs to be freed by caller | |
2361 | */ | |
2362 | int br_multicast_list_adjacent(struct net_device *dev, | |
2363 | struct list_head *br_ip_list) | |
2364 | { | |
2365 | struct net_bridge *br; | |
2366 | struct net_bridge_port *port; | |
2367 | struct net_bridge_port_group *group; | |
2368 | struct br_ip_list *entry; | |
2369 | int count = 0; | |
2370 | ||
2371 | rcu_read_lock(); | |
2372 | if (!br_ip_list || !br_port_exists(dev)) | |
2373 | goto unlock; | |
2374 | ||
2375 | port = br_port_get_rcu(dev); | |
2376 | if (!port || !port->br) | |
2377 | goto unlock; | |
2378 | ||
2379 | br = port->br; | |
2380 | ||
2381 | list_for_each_entry_rcu(port, &br->port_list, list) { | |
2382 | if (!port->dev || port->dev == dev) | |
2383 | continue; | |
2384 | ||
2385 | hlist_for_each_entry_rcu(group, &port->mglist, mglist) { | |
2386 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); | |
2387 | if (!entry) | |
2388 | goto unlock; | |
2389 | ||
2390 | entry->addr = group->addr; | |
2391 | list_add(&entry->list, br_ip_list); | |
2392 | count++; | |
2393 | } | |
2394 | } | |
2395 | ||
2396 | unlock: | |
2397 | rcu_read_unlock(); | |
2398 | return count; | |
2399 | } | |
2400 | EXPORT_SYMBOL_GPL(br_multicast_list_adjacent); | |
2cd41431 | 2401 | |
c34963e2 LL |
2402 | /** |
2403 | * br_multicast_has_querier_anywhere - Checks for a querier on a bridge | |
2404 | * @dev: The bridge port providing the bridge on which to check for a querier | |
2405 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2406 | * | |
2407 | * Checks whether the given interface has a bridge on top and if so returns | |
2408 | * true if a valid querier exists anywhere on the bridged link layer. | |
2409 | * Otherwise returns false. | |
2410 | */ | |
2411 | bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto) | |
2412 | { | |
2413 | struct net_bridge *br; | |
2414 | struct net_bridge_port *port; | |
2415 | struct ethhdr eth; | |
2416 | bool ret = false; | |
2417 | ||
2418 | rcu_read_lock(); | |
2419 | if (!br_port_exists(dev)) | |
2420 | goto unlock; | |
2421 | ||
2422 | port = br_port_get_rcu(dev); | |
2423 | if (!port || !port->br) | |
2424 | goto unlock; | |
2425 | ||
2426 | br = port->br; | |
2427 | ||
2428 | memset(ð, 0, sizeof(eth)); | |
2429 | eth.h_proto = htons(proto); | |
2430 | ||
2431 | ret = br_multicast_querier_exists(br, ð); | |
2432 | ||
2433 | unlock: | |
2434 | rcu_read_unlock(); | |
2435 | return ret; | |
2436 | } | |
2437 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere); | |
2438 | ||
2cd41431 LL |
2439 | /** |
2440 | * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port | |
2441 | * @dev: The bridge port adjacent to which to check for a querier | |
2442 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2443 | * | |
2444 | * Checks whether the given interface has a bridge on top and if so returns | |
2445 | * true if a selected querier is behind one of the other ports of this | |
2446 | * bridge. Otherwise returns false. | |
2447 | */ | |
2448 | bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto) | |
2449 | { | |
2450 | struct net_bridge *br; | |
2451 | struct net_bridge_port *port; | |
2452 | bool ret = false; | |
2453 | ||
2454 | rcu_read_lock(); | |
2455 | if (!br_port_exists(dev)) | |
2456 | goto unlock; | |
2457 | ||
2458 | port = br_port_get_rcu(dev); | |
2459 | if (!port || !port->br) | |
2460 | goto unlock; | |
2461 | ||
2462 | br = port->br; | |
2463 | ||
2464 | switch (proto) { | |
2465 | case ETH_P_IP: | |
2466 | if (!timer_pending(&br->ip4_other_query.timer) || | |
2467 | rcu_dereference(br->ip4_querier.port) == port) | |
2468 | goto unlock; | |
2469 | break; | |
3993c4e1 | 2470 | #if IS_ENABLED(CONFIG_IPV6) |
2cd41431 LL |
2471 | case ETH_P_IPV6: |
2472 | if (!timer_pending(&br->ip6_other_query.timer) || | |
2473 | rcu_dereference(br->ip6_querier.port) == port) | |
2474 | goto unlock; | |
2475 | break; | |
3993c4e1 | 2476 | #endif |
2cd41431 LL |
2477 | default: |
2478 | goto unlock; | |
2479 | } | |
2480 | ||
2481 | ret = true; | |
2482 | unlock: | |
2483 | rcu_read_unlock(); | |
2484 | return ret; | |
2485 | } | |
2486 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent); | |
1080ab95 NA |
2487 | |
2488 | static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, | |
a65056ec | 2489 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2490 | { |
2491 | struct bridge_mcast_stats *pstats = this_cpu_ptr(stats); | |
a65056ec NA |
2492 | __be16 proto = skb->protocol; |
2493 | unsigned int t_len; | |
1080ab95 NA |
2494 | |
2495 | u64_stats_update_begin(&pstats->syncp); | |
2496 | switch (proto) { | |
2497 | case htons(ETH_P_IP): | |
a65056ec | 2498 | t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb); |
1080ab95 NA |
2499 | switch (type) { |
2500 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
2501 | pstats->mstats.igmp_v1reports[dir]++; | |
2502 | break; | |
2503 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
2504 | pstats->mstats.igmp_v2reports[dir]++; | |
2505 | break; | |
2506 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
2507 | pstats->mstats.igmp_v3reports[dir]++; | |
2508 | break; | |
2509 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
a65056ec NA |
2510 | if (t_len != sizeof(struct igmphdr)) { |
2511 | pstats->mstats.igmp_v3queries[dir]++; | |
2512 | } else { | |
2513 | unsigned int offset = skb_transport_offset(skb); | |
2514 | struct igmphdr *ih, _ihdr; | |
2515 | ||
2516 | ih = skb_header_pointer(skb, offset, | |
2517 | sizeof(_ihdr), &_ihdr); | |
2518 | if (!ih) | |
2519 | break; | |
2520 | if (!ih->code) | |
2521 | pstats->mstats.igmp_v1queries[dir]++; | |
2522 | else | |
2523 | pstats->mstats.igmp_v2queries[dir]++; | |
2524 | } | |
1080ab95 NA |
2525 | break; |
2526 | case IGMP_HOST_LEAVE_MESSAGE: | |
2527 | pstats->mstats.igmp_leaves[dir]++; | |
2528 | break; | |
2529 | } | |
2530 | break; | |
2531 | #if IS_ENABLED(CONFIG_IPV6) | |
2532 | case htons(ETH_P_IPV6): | |
a65056ec NA |
2533 | t_len = ntohs(ipv6_hdr(skb)->payload_len) + |
2534 | sizeof(struct ipv6hdr); | |
2535 | t_len -= skb_network_header_len(skb); | |
1080ab95 NA |
2536 | switch (type) { |
2537 | case ICMPV6_MGM_REPORT: | |
2538 | pstats->mstats.mld_v1reports[dir]++; | |
2539 | break; | |
2540 | case ICMPV6_MLD2_REPORT: | |
2541 | pstats->mstats.mld_v2reports[dir]++; | |
2542 | break; | |
2543 | case ICMPV6_MGM_QUERY: | |
a65056ec NA |
2544 | if (t_len != sizeof(struct mld_msg)) |
2545 | pstats->mstats.mld_v2queries[dir]++; | |
2546 | else | |
2547 | pstats->mstats.mld_v1queries[dir]++; | |
1080ab95 NA |
2548 | break; |
2549 | case ICMPV6_MGM_REDUCTION: | |
2550 | pstats->mstats.mld_leaves[dir]++; | |
2551 | break; | |
2552 | } | |
2553 | break; | |
2554 | #endif /* CONFIG_IPV6 */ | |
2555 | } | |
2556 | u64_stats_update_end(&pstats->syncp); | |
2557 | } | |
2558 | ||
2559 | void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, | |
a65056ec | 2560 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2561 | { |
2562 | struct bridge_mcast_stats __percpu *stats; | |
2563 | ||
2564 | /* if multicast_disabled is true then igmp type can't be set */ | |
2565 | if (!type || !br->multicast_stats_enabled) | |
2566 | return; | |
2567 | ||
2568 | if (p) | |
2569 | stats = p->mcast_stats; | |
2570 | else | |
2571 | stats = br->mcast_stats; | |
2572 | if (WARN_ON(!stats)) | |
2573 | return; | |
2574 | ||
a65056ec | 2575 | br_mcast_stats_add(stats, skb, type, dir); |
1080ab95 NA |
2576 | } |
2577 | ||
2578 | int br_multicast_init_stats(struct net_bridge *br) | |
2579 | { | |
2580 | br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); | |
2581 | if (!br->mcast_stats) | |
2582 | return -ENOMEM; | |
2583 | ||
2584 | return 0; | |
2585 | } | |
2586 | ||
b6fe0440 IS |
2587 | void br_multicast_uninit_stats(struct net_bridge *br) |
2588 | { | |
2589 | free_percpu(br->mcast_stats); | |
2590 | } | |
2591 | ||
1080ab95 NA |
2592 | static void mcast_stats_add_dir(u64 *dst, u64 *src) |
2593 | { | |
2594 | dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX]; | |
2595 | dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX]; | |
2596 | } | |
2597 | ||
2598 | void br_multicast_get_stats(const struct net_bridge *br, | |
2599 | const struct net_bridge_port *p, | |
2600 | struct br_mcast_stats *dest) | |
2601 | { | |
2602 | struct bridge_mcast_stats __percpu *stats; | |
2603 | struct br_mcast_stats tdst; | |
2604 | int i; | |
2605 | ||
2606 | memset(dest, 0, sizeof(*dest)); | |
2607 | if (p) | |
2608 | stats = p->mcast_stats; | |
2609 | else | |
2610 | stats = br->mcast_stats; | |
2611 | if (WARN_ON(!stats)) | |
2612 | return; | |
2613 | ||
2614 | memset(&tdst, 0, sizeof(tdst)); | |
2615 | for_each_possible_cpu(i) { | |
2616 | struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i); | |
2617 | struct br_mcast_stats temp; | |
2618 | unsigned int start; | |
2619 | ||
2620 | do { | |
2621 | start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); | |
2622 | memcpy(&temp, &cpu_stats->mstats, sizeof(temp)); | |
2623 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); | |
2624 | ||
a65056ec NA |
2625 | mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries); |
2626 | mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries); | |
2627 | mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries); | |
1080ab95 NA |
2628 | mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves); |
2629 | mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports); | |
2630 | mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports); | |
2631 | mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports); | |
2632 | tdst.igmp_parse_errors += temp.igmp_parse_errors; | |
2633 | ||
a65056ec NA |
2634 | mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries); |
2635 | mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries); | |
1080ab95 NA |
2636 | mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves); |
2637 | mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports); | |
2638 | mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports); | |
2639 | tdst.mld_parse_errors += temp.mld_parse_errors; | |
2640 | } | |
2641 | memcpy(dest, &tdst, sizeof(*dest)); | |
2642 | } |