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Commit | Line | Data |
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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> |
eb1d1641 | 28 | #include <net/ip.h> |
dfd56b8b | 29 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
30 | #include <net/ipv6.h> |
31 | #include <net/mld.h> | |
d4c4f07d | 32 | #include <net/ip6_checksum.h> |
3c3769e6 | 33 | #include <net/addrconf.h> |
08b202b6 | 34 | #endif |
eb1d1641 HX |
35 | |
36 | #include "br_private.h" | |
37 | ||
cc0fdd80 | 38 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 39 | struct bridge_mcast_own_query *query); |
754bc547 SA |
40 | static void br_multicast_add_router(struct net_bridge *br, |
41 | struct net_bridge_port *port); | |
bc8c20ac SA |
42 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
43 | struct net_bridge_port *port, | |
44 | __be32 group, | |
45 | __u16 vid); | |
46 | #if IS_ENABLED(CONFIG_IPV6) | |
47 | static void br_ip6_multicast_leave_group(struct net_bridge *br, | |
48 | struct net_bridge_port *port, | |
49 | const struct in6_addr *group, | |
50 | __u16 vid); | |
51 | #endif | |
2ce297fc | 52 | unsigned int br_mdb_rehash_seq; |
c83b8fab | 53 | |
8ef2a9a5 YH |
54 | static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b) |
55 | { | |
56 | if (a->proto != b->proto) | |
57 | return 0; | |
b0e9a30d VY |
58 | if (a->vid != b->vid) |
59 | return 0; | |
8ef2a9a5 YH |
60 | switch (a->proto) { |
61 | case htons(ETH_P_IP): | |
62 | return a->u.ip4 == b->u.ip4; | |
dfd56b8b | 63 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
64 | case htons(ETH_P_IPV6): |
65 | return ipv6_addr_equal(&a->u.ip6, &b->u.ip6); | |
66 | #endif | |
8ef2a9a5 YH |
67 | } |
68 | return 0; | |
69 | } | |
70 | ||
b0e9a30d VY |
71 | static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip, |
72 | __u16 vid) | |
eb1d1641 | 73 | { |
b0e9a30d | 74 | return jhash_2words((__force u32)ip, vid, mdb->secret) & (mdb->max - 1); |
eb1d1641 HX |
75 | } |
76 | ||
dfd56b8b | 77 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 78 | static inline int __br_ip6_hash(struct net_bridge_mdb_htable *mdb, |
b0e9a30d VY |
79 | const struct in6_addr *ip, |
80 | __u16 vid) | |
08b202b6 | 81 | { |
b0e9a30d VY |
82 | return jhash_2words(ipv6_addr_hash(ip), vid, |
83 | mdb->secret) & (mdb->max - 1); | |
08b202b6 YH |
84 | } |
85 | #endif | |
86 | ||
8ef2a9a5 YH |
87 | static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb, |
88 | struct br_ip *ip) | |
89 | { | |
90 | switch (ip->proto) { | |
91 | case htons(ETH_P_IP): | |
b0e9a30d | 92 | return __br_ip4_hash(mdb, ip->u.ip4, ip->vid); |
dfd56b8b | 93 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 94 | case htons(ETH_P_IPV6): |
b0e9a30d | 95 | return __br_ip6_hash(mdb, &ip->u.ip6, ip->vid); |
08b202b6 | 96 | #endif |
8ef2a9a5 YH |
97 | } |
98 | return 0; | |
eb1d1641 HX |
99 | } |
100 | ||
101 | static struct net_bridge_mdb_entry *__br_mdb_ip_get( | |
8ef2a9a5 | 102 | struct net_bridge_mdb_htable *mdb, struct br_ip *dst, int hash) |
eb1d1641 HX |
103 | { |
104 | struct net_bridge_mdb_entry *mp; | |
eb1d1641 | 105 | |
b67bfe0d | 106 | hlist_for_each_entry_rcu(mp, &mdb->mhash[hash], hlist[mdb->ver]) { |
8ef2a9a5 | 107 | if (br_ip_equal(&mp->addr, dst)) |
eb1d1641 HX |
108 | return mp; |
109 | } | |
110 | ||
111 | return NULL; | |
112 | } | |
113 | ||
cfd56754 CW |
114 | struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, |
115 | struct br_ip *dst) | |
7f285fa7 HX |
116 | { |
117 | if (!mdb) | |
118 | return NULL; | |
119 | ||
120 | return __br_mdb_ip_get(mdb, dst, br_ip_hash(mdb, dst)); | |
121 | } | |
122 | ||
8ef2a9a5 | 123 | static struct net_bridge_mdb_entry *br_mdb_ip4_get( |
b0e9a30d | 124 | struct net_bridge_mdb_htable *mdb, __be32 dst, __u16 vid) |
eb1d1641 | 125 | { |
8ef2a9a5 YH |
126 | struct br_ip br_dst; |
127 | ||
128 | br_dst.u.ip4 = dst; | |
129 | br_dst.proto = htons(ETH_P_IP); | |
b0e9a30d | 130 | br_dst.vid = vid; |
0821ec55 | 131 | |
7f285fa7 | 132 | return br_mdb_ip_get(mdb, &br_dst); |
8ef2a9a5 YH |
133 | } |
134 | ||
dfd56b8b | 135 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 136 | static struct net_bridge_mdb_entry *br_mdb_ip6_get( |
b0e9a30d VY |
137 | struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst, |
138 | __u16 vid) | |
08b202b6 YH |
139 | { |
140 | struct br_ip br_dst; | |
0821ec55 | 141 | |
4e3fd7a0 | 142 | br_dst.u.ip6 = *dst; |
08b202b6 | 143 | br_dst.proto = htons(ETH_P_IPV6); |
b0e9a30d | 144 | br_dst.vid = vid; |
08b202b6 | 145 | |
7f285fa7 | 146 | return br_mdb_ip_get(mdb, &br_dst); |
08b202b6 YH |
147 | } |
148 | #endif | |
149 | ||
eb1d1641 | 150 | struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, |
fbca58a2 | 151 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 152 | { |
e8051688 | 153 | struct net_bridge_mdb_htable *mdb = rcu_dereference(br->mdb); |
8ef2a9a5 YH |
154 | struct br_ip ip; |
155 | ||
7f285fa7 | 156 | if (br->multicast_disabled) |
eb1d1641 HX |
157 | return NULL; |
158 | ||
8ef2a9a5 | 159 | if (BR_INPUT_SKB_CB(skb)->igmp) |
eb1d1641 HX |
160 | return NULL; |
161 | ||
8ef2a9a5 | 162 | ip.proto = skb->protocol; |
fbca58a2 | 163 | ip.vid = vid; |
8ef2a9a5 | 164 | |
eb1d1641 HX |
165 | switch (skb->protocol) { |
166 | case htons(ETH_P_IP): | |
8ef2a9a5 YH |
167 | ip.u.ip4 = ip_hdr(skb)->daddr; |
168 | break; | |
dfd56b8b | 169 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 170 | case htons(ETH_P_IPV6): |
4e3fd7a0 | 171 | ip.u.ip6 = ipv6_hdr(skb)->daddr; |
08b202b6 YH |
172 | break; |
173 | #endif | |
8ef2a9a5 YH |
174 | default: |
175 | return NULL; | |
eb1d1641 HX |
176 | } |
177 | ||
8ef2a9a5 | 178 | return br_mdb_ip_get(mdb, &ip); |
eb1d1641 HX |
179 | } |
180 | ||
181 | static void br_mdb_free(struct rcu_head *head) | |
182 | { | |
183 | struct net_bridge_mdb_htable *mdb = | |
184 | container_of(head, struct net_bridge_mdb_htable, rcu); | |
185 | struct net_bridge_mdb_htable *old = mdb->old; | |
186 | ||
187 | mdb->old = NULL; | |
188 | kfree(old->mhash); | |
189 | kfree(old); | |
190 | } | |
191 | ||
192 | static int br_mdb_copy(struct net_bridge_mdb_htable *new, | |
193 | struct net_bridge_mdb_htable *old, | |
194 | int elasticity) | |
195 | { | |
196 | struct net_bridge_mdb_entry *mp; | |
eb1d1641 HX |
197 | int maxlen; |
198 | int len; | |
199 | int i; | |
200 | ||
201 | for (i = 0; i < old->max; i++) | |
b67bfe0d | 202 | hlist_for_each_entry(mp, &old->mhash[i], hlist[old->ver]) |
eb1d1641 | 203 | hlist_add_head(&mp->hlist[new->ver], |
8ef2a9a5 | 204 | &new->mhash[br_ip_hash(new, &mp->addr)]); |
eb1d1641 HX |
205 | |
206 | if (!elasticity) | |
207 | return 0; | |
208 | ||
209 | maxlen = 0; | |
210 | for (i = 0; i < new->max; i++) { | |
211 | len = 0; | |
b67bfe0d | 212 | hlist_for_each_entry(mp, &new->mhash[i], hlist[new->ver]) |
eb1d1641 HX |
213 | len++; |
214 | if (len > maxlen) | |
215 | maxlen = len; | |
216 | } | |
217 | ||
218 | return maxlen > elasticity ? -EINVAL : 0; | |
219 | } | |
220 | ||
cfd56754 | 221 | void br_multicast_free_pg(struct rcu_head *head) |
eb1d1641 HX |
222 | { |
223 | struct net_bridge_port_group *p = | |
224 | container_of(head, struct net_bridge_port_group, rcu); | |
225 | ||
226 | kfree(p); | |
227 | } | |
228 | ||
229 | static void br_multicast_free_group(struct rcu_head *head) | |
230 | { | |
231 | struct net_bridge_mdb_entry *mp = | |
232 | container_of(head, struct net_bridge_mdb_entry, rcu); | |
233 | ||
234 | kfree(mp); | |
235 | } | |
236 | ||
237 | static void br_multicast_group_expired(unsigned long data) | |
238 | { | |
239 | struct net_bridge_mdb_entry *mp = (void *)data; | |
240 | struct net_bridge *br = mp->br; | |
241 | struct net_bridge_mdb_htable *mdb; | |
242 | ||
243 | spin_lock(&br->multicast_lock); | |
244 | if (!netif_running(br->dev) || timer_pending(&mp->timer)) | |
245 | goto out; | |
246 | ||
8a870178 | 247 | mp->mglist = false; |
eb1d1641 HX |
248 | |
249 | if (mp->ports) | |
250 | goto out; | |
251 | ||
e8051688 ED |
252 | mdb = mlock_dereference(br->mdb, br); |
253 | ||
eb1d1641 HX |
254 | hlist_del_rcu(&mp->hlist[mdb->ver]); |
255 | mdb->size--; | |
256 | ||
eb1d1641 HX |
257 | call_rcu_bh(&mp->rcu, br_multicast_free_group); |
258 | ||
259 | out: | |
260 | spin_unlock(&br->multicast_lock); | |
261 | } | |
262 | ||
263 | static void br_multicast_del_pg(struct net_bridge *br, | |
264 | struct net_bridge_port_group *pg) | |
265 | { | |
e8051688 | 266 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 HX |
267 | struct net_bridge_mdb_entry *mp; |
268 | struct net_bridge_port_group *p; | |
e8051688 ED |
269 | struct net_bridge_port_group __rcu **pp; |
270 | ||
271 | mdb = mlock_dereference(br->mdb, br); | |
eb1d1641 | 272 | |
8ef2a9a5 | 273 | mp = br_mdb_ip_get(mdb, &pg->addr); |
eb1d1641 HX |
274 | if (WARN_ON(!mp)) |
275 | return; | |
276 | ||
e8051688 ED |
277 | for (pp = &mp->ports; |
278 | (p = mlock_dereference(*pp, br)) != NULL; | |
279 | pp = &p->next) { | |
eb1d1641 HX |
280 | if (p != pg) |
281 | continue; | |
282 | ||
83f6a740 | 283 | rcu_assign_pointer(*pp, p->next); |
eb1d1641 HX |
284 | hlist_del_init(&p->mglist); |
285 | del_timer(&p->timer); | |
45ebcce5 ER |
286 | br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB, |
287 | p->flags); | |
eb1d1641 HX |
288 | call_rcu_bh(&p->rcu, br_multicast_free_pg); |
289 | ||
454594f3 | 290 | if (!mp->ports && !mp->mglist && |
eb1d1641 HX |
291 | netif_running(br->dev)) |
292 | mod_timer(&mp->timer, jiffies); | |
293 | ||
294 | return; | |
295 | } | |
296 | ||
297 | WARN_ON(1); | |
298 | } | |
299 | ||
300 | static void br_multicast_port_group_expired(unsigned long data) | |
301 | { | |
302 | struct net_bridge_port_group *pg = (void *)data; | |
303 | struct net_bridge *br = pg->port->br; | |
304 | ||
305 | spin_lock(&br->multicast_lock); | |
306 | if (!netif_running(br->dev) || timer_pending(&pg->timer) || | |
9d06b6d8 | 307 | hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT) |
eb1d1641 HX |
308 | goto out; |
309 | ||
310 | br_multicast_del_pg(br, pg); | |
311 | ||
312 | out: | |
313 | spin_unlock(&br->multicast_lock); | |
314 | } | |
315 | ||
e8051688 | 316 | static int br_mdb_rehash(struct net_bridge_mdb_htable __rcu **mdbp, int max, |
eb1d1641 HX |
317 | int elasticity) |
318 | { | |
e8051688 | 319 | struct net_bridge_mdb_htable *old = rcu_dereference_protected(*mdbp, 1); |
eb1d1641 HX |
320 | struct net_bridge_mdb_htable *mdb; |
321 | int err; | |
322 | ||
323 | mdb = kmalloc(sizeof(*mdb), GFP_ATOMIC); | |
324 | if (!mdb) | |
325 | return -ENOMEM; | |
326 | ||
327 | mdb->max = max; | |
328 | mdb->old = old; | |
329 | ||
330 | mdb->mhash = kzalloc(max * sizeof(*mdb->mhash), GFP_ATOMIC); | |
331 | if (!mdb->mhash) { | |
332 | kfree(mdb); | |
333 | return -ENOMEM; | |
334 | } | |
335 | ||
336 | mdb->size = old ? old->size : 0; | |
337 | mdb->ver = old ? old->ver ^ 1 : 0; | |
338 | ||
339 | if (!old || elasticity) | |
340 | get_random_bytes(&mdb->secret, sizeof(mdb->secret)); | |
341 | else | |
342 | mdb->secret = old->secret; | |
343 | ||
344 | if (!old) | |
345 | goto out; | |
346 | ||
347 | err = br_mdb_copy(mdb, old, elasticity); | |
348 | if (err) { | |
349 | kfree(mdb->mhash); | |
350 | kfree(mdb); | |
351 | return err; | |
352 | } | |
353 | ||
2ce297fc | 354 | br_mdb_rehash_seq++; |
eb1d1641 HX |
355 | call_rcu_bh(&mdb->rcu, br_mdb_free); |
356 | ||
357 | out: | |
358 | rcu_assign_pointer(*mdbp, mdb); | |
359 | ||
360 | return 0; | |
361 | } | |
362 | ||
8ef2a9a5 | 363 | static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
364 | __be32 group, |
365 | u8 *igmp_type) | |
eb1d1641 HX |
366 | { |
367 | struct sk_buff *skb; | |
368 | struct igmphdr *ih; | |
369 | struct ethhdr *eth; | |
370 | struct iphdr *iph; | |
371 | ||
372 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) + | |
373 | sizeof(*ih) + 4); | |
374 | if (!skb) | |
375 | goto out; | |
376 | ||
377 | skb->protocol = htons(ETH_P_IP); | |
378 | ||
379 | skb_reset_mac_header(skb); | |
380 | eth = eth_hdr(skb); | |
381 | ||
e5a727f6 | 382 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
eb1d1641 HX |
383 | eth->h_dest[0] = 1; |
384 | eth->h_dest[1] = 0; | |
385 | eth->h_dest[2] = 0x5e; | |
386 | eth->h_dest[3] = 0; | |
387 | eth->h_dest[4] = 0; | |
388 | eth->h_dest[5] = 1; | |
389 | eth->h_proto = htons(ETH_P_IP); | |
390 | skb_put(skb, sizeof(*eth)); | |
391 | ||
392 | skb_set_network_header(skb, skb->len); | |
393 | iph = ip_hdr(skb); | |
394 | ||
395 | iph->version = 4; | |
396 | iph->ihl = 6; | |
397 | iph->tos = 0xc0; | |
398 | iph->tot_len = htons(sizeof(*iph) + sizeof(*ih) + 4); | |
399 | iph->id = 0; | |
400 | iph->frag_off = htons(IP_DF); | |
401 | iph->ttl = 1; | |
402 | iph->protocol = IPPROTO_IGMP; | |
1c8ad5bf CW |
403 | iph->saddr = br->multicast_query_use_ifaddr ? |
404 | inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0; | |
eb1d1641 HX |
405 | iph->daddr = htonl(INADDR_ALLHOSTS_GROUP); |
406 | ((u8 *)&iph[1])[0] = IPOPT_RA; | |
407 | ((u8 *)&iph[1])[1] = 4; | |
408 | ((u8 *)&iph[1])[2] = 0; | |
409 | ((u8 *)&iph[1])[3] = 0; | |
410 | ip_send_check(iph); | |
411 | skb_put(skb, 24); | |
412 | ||
413 | skb_set_transport_header(skb, skb->len); | |
414 | ih = igmp_hdr(skb); | |
1080ab95 | 415 | *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY; |
eb1d1641 HX |
416 | ih->type = IGMP_HOST_MEMBERSHIP_QUERY; |
417 | ih->code = (group ? br->multicast_last_member_interval : | |
418 | br->multicast_query_response_interval) / | |
419 | (HZ / IGMP_TIMER_SCALE); | |
420 | ih->group = group; | |
421 | ih->csum = 0; | |
422 | ih->csum = ip_compute_csum((void *)ih, sizeof(struct igmphdr)); | |
423 | skb_put(skb, sizeof(*ih)); | |
424 | ||
425 | __skb_pull(skb, sizeof(*eth)); | |
426 | ||
427 | out: | |
428 | return skb; | |
429 | } | |
430 | ||
dfd56b8b | 431 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 432 | static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
433 | const struct in6_addr *grp, |
434 | u8 *igmp_type) | |
08b202b6 YH |
435 | { |
436 | struct sk_buff *skb; | |
437 | struct ipv6hdr *ip6h; | |
438 | struct mld_msg *mldq; | |
439 | struct ethhdr *eth; | |
440 | u8 *hopopt; | |
441 | unsigned long interval; | |
442 | ||
443 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) + | |
444 | 8 + sizeof(*mldq)); | |
445 | if (!skb) | |
446 | goto out; | |
447 | ||
448 | skb->protocol = htons(ETH_P_IPV6); | |
449 | ||
450 | /* Ethernet header */ | |
451 | skb_reset_mac_header(skb); | |
452 | eth = eth_hdr(skb); | |
453 | ||
e5a727f6 | 454 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
08b202b6 YH |
455 | eth->h_proto = htons(ETH_P_IPV6); |
456 | skb_put(skb, sizeof(*eth)); | |
457 | ||
458 | /* IPv6 header + HbH option */ | |
459 | skb_set_network_header(skb, skb->len); | |
460 | ip6h = ipv6_hdr(skb); | |
461 | ||
462 | *(__force __be32 *)ip6h = htonl(0x60000000); | |
76d66158 | 463 | ip6h->payload_len = htons(8 + sizeof(*mldq)); |
08b202b6 YH |
464 | ip6h->nexthdr = IPPROTO_HOPOPTS; |
465 | ip6h->hop_limit = 1; | |
a7bff75b | 466 | ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1)); |
d1d81d4c UW |
467 | if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, |
468 | &ip6h->saddr)) { | |
469 | kfree_skb(skb); | |
0888d5f3 | 470 | br->has_ipv6_addr = 0; |
d1d81d4c UW |
471 | return NULL; |
472 | } | |
0888d5f3 | 473 | |
474 | br->has_ipv6_addr = 1; | |
36cff5a1 | 475 | ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); |
08b202b6 YH |
476 | |
477 | hopopt = (u8 *)(ip6h + 1); | |
478 | hopopt[0] = IPPROTO_ICMPV6; /* next hdr */ | |
479 | hopopt[1] = 0; /* length of HbH */ | |
480 | hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */ | |
481 | hopopt[3] = 2; /* Length of RA Option */ | |
482 | hopopt[4] = 0; /* Type = 0x0000 (MLD) */ | |
483 | hopopt[5] = 0; | |
1de5a71c EZ |
484 | hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */ |
485 | hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */ | |
08b202b6 YH |
486 | |
487 | skb_put(skb, sizeof(*ip6h) + 8); | |
488 | ||
489 | /* ICMPv6 */ | |
490 | skb_set_transport_header(skb, skb->len); | |
491 | mldq = (struct mld_msg *) icmp6_hdr(skb); | |
492 | ||
1080ab95 | 493 | interval = ipv6_addr_any(grp) ? |
32de868c LL |
494 | br->multicast_query_response_interval : |
495 | br->multicast_last_member_interval; | |
08b202b6 | 496 | |
1080ab95 | 497 | *igmp_type = ICMPV6_MGM_QUERY; |
08b202b6 YH |
498 | mldq->mld_type = ICMPV6_MGM_QUERY; |
499 | mldq->mld_code = 0; | |
500 | mldq->mld_cksum = 0; | |
501 | mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval)); | |
502 | mldq->mld_reserved = 0; | |
1080ab95 | 503 | mldq->mld_mca = *grp; |
08b202b6 YH |
504 | |
505 | /* checksum */ | |
506 | mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
507 | sizeof(*mldq), IPPROTO_ICMPV6, | |
508 | csum_partial(mldq, | |
509 | sizeof(*mldq), 0)); | |
510 | skb_put(skb, sizeof(*mldq)); | |
511 | ||
512 | __skb_pull(skb, sizeof(*eth)); | |
513 | ||
514 | out: | |
515 | return skb; | |
516 | } | |
517 | #endif | |
518 | ||
8ef2a9a5 | 519 | static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
520 | struct br_ip *addr, |
521 | u8 *igmp_type) | |
8ef2a9a5 YH |
522 | { |
523 | switch (addr->proto) { | |
524 | case htons(ETH_P_IP): | |
1080ab95 | 525 | return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type); |
dfd56b8b | 526 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 527 | case htons(ETH_P_IPV6): |
1080ab95 NA |
528 | return br_ip6_multicast_alloc_query(br, &addr->u.ip6, |
529 | igmp_type); | |
08b202b6 | 530 | #endif |
8ef2a9a5 YH |
531 | } |
532 | return NULL; | |
533 | } | |
534 | ||
eb1d1641 | 535 | static struct net_bridge_mdb_entry *br_multicast_get_group( |
8ef2a9a5 YH |
536 | struct net_bridge *br, struct net_bridge_port *port, |
537 | struct br_ip *group, int hash) | |
eb1d1641 | 538 | { |
e8051688 | 539 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 | 540 | struct net_bridge_mdb_entry *mp; |
95c96174 ED |
541 | unsigned int count = 0; |
542 | unsigned int max; | |
eb1d1641 HX |
543 | int elasticity; |
544 | int err; | |
545 | ||
e8051688 | 546 | mdb = rcu_dereference_protected(br->mdb, 1); |
b67bfe0d | 547 | hlist_for_each_entry(mp, &mdb->mhash[hash], hlist[mdb->ver]) { |
eb1d1641 | 548 | count++; |
8ef2a9a5 | 549 | if (unlikely(br_ip_equal(group, &mp->addr))) |
eb1d1641 | 550 | return mp; |
eb1d1641 HX |
551 | } |
552 | ||
553 | elasticity = 0; | |
554 | max = mdb->max; | |
555 | ||
556 | if (unlikely(count > br->hash_elasticity && count)) { | |
557 | if (net_ratelimit()) | |
28a16c97 | 558 | br_info(br, "Multicast hash table " |
559 | "chain limit reached: %s\n", | |
560 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
561 | |
562 | elasticity = br->hash_elasticity; | |
563 | } | |
564 | ||
565 | if (mdb->size >= max) { | |
566 | max *= 2; | |
036be6db TG |
567 | if (unlikely(max > br->hash_max)) { |
568 | br_warn(br, "Multicast hash table maximum of %d " | |
569 | "reached, disabling snooping: %s\n", | |
570 | br->hash_max, | |
571 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
572 | err = -E2BIG; |
573 | disable: | |
574 | br->multicast_disabled = 1; | |
575 | goto err; | |
576 | } | |
577 | } | |
578 | ||
579 | if (max > mdb->max || elasticity) { | |
580 | if (mdb->old) { | |
581 | if (net_ratelimit()) | |
28a16c97 | 582 | br_info(br, "Multicast hash table " |
583 | "on fire: %s\n", | |
584 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
585 | err = -EEXIST; |
586 | goto err; | |
587 | } | |
588 | ||
589 | err = br_mdb_rehash(&br->mdb, max, elasticity); | |
590 | if (err) { | |
28a16c97 | 591 | br_warn(br, "Cannot rehash multicast " |
592 | "hash table, disabling snooping: %s, %d, %d\n", | |
593 | port ? port->dev->name : br->dev->name, | |
594 | mdb->size, err); | |
eb1d1641 HX |
595 | goto disable; |
596 | } | |
597 | ||
598 | err = -EAGAIN; | |
599 | goto err; | |
600 | } | |
601 | ||
602 | return NULL; | |
603 | ||
604 | err: | |
605 | mp = ERR_PTR(err); | |
606 | return mp; | |
607 | } | |
608 | ||
cfd56754 CW |
609 | struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, |
610 | struct net_bridge_port *port, struct br_ip *group) | |
eb1d1641 | 611 | { |
e8051688 | 612 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 HX |
613 | struct net_bridge_mdb_entry *mp; |
614 | int hash; | |
4c0833bc | 615 | int err; |
eb1d1641 | 616 | |
e8051688 | 617 | mdb = rcu_dereference_protected(br->mdb, 1); |
eb1d1641 | 618 | if (!mdb) { |
4c0833bc TK |
619 | err = br_mdb_rehash(&br->mdb, BR_HASH_SIZE, 0); |
620 | if (err) | |
621 | return ERR_PTR(err); | |
eb1d1641 HX |
622 | goto rehash; |
623 | } | |
624 | ||
625 | hash = br_ip_hash(mdb, group); | |
626 | mp = br_multicast_get_group(br, port, group, hash); | |
627 | switch (PTR_ERR(mp)) { | |
628 | case 0: | |
629 | break; | |
630 | ||
631 | case -EAGAIN: | |
632 | rehash: | |
e8051688 | 633 | mdb = rcu_dereference_protected(br->mdb, 1); |
eb1d1641 HX |
634 | hash = br_ip_hash(mdb, group); |
635 | break; | |
636 | ||
637 | default: | |
638 | goto out; | |
639 | } | |
640 | ||
641 | mp = kzalloc(sizeof(*mp), GFP_ATOMIC); | |
642 | if (unlikely(!mp)) | |
4c0833bc | 643 | return ERR_PTR(-ENOMEM); |
eb1d1641 HX |
644 | |
645 | mp->br = br; | |
8ef2a9a5 | 646 | mp->addr = *group; |
1faabf2a ED |
647 | setup_timer(&mp->timer, br_multicast_group_expired, |
648 | (unsigned long)mp); | |
649 | ||
eb1d1641 HX |
650 | hlist_add_head_rcu(&mp->hlist[mdb->ver], &mdb->mhash[hash]); |
651 | mdb->size++; | |
652 | ||
653 | out: | |
654 | return mp; | |
655 | } | |
656 | ||
cfd56754 CW |
657 | struct net_bridge_port_group *br_multicast_new_port_group( |
658 | struct net_bridge_port *port, | |
659 | struct br_ip *group, | |
ccb1c31a | 660 | struct net_bridge_port_group __rcu *next, |
9d06b6d8 | 661 | unsigned char flags) |
cfd56754 CW |
662 | { |
663 | struct net_bridge_port_group *p; | |
664 | ||
665 | p = kzalloc(sizeof(*p), GFP_ATOMIC); | |
666 | if (unlikely(!p)) | |
667 | return NULL; | |
668 | ||
669 | p->addr = *group; | |
670 | p->port = port; | |
9d06b6d8 | 671 | p->flags = flags; |
eca2a43b | 672 | rcu_assign_pointer(p->next, next); |
cfd56754 CW |
673 | hlist_add_head(&p->mglist, &port->mglist); |
674 | setup_timer(&p->timer, br_multicast_port_group_expired, | |
675 | (unsigned long)p); | |
676 | return p; | |
677 | } | |
678 | ||
eb1d1641 | 679 | static int br_multicast_add_group(struct net_bridge *br, |
8ef2a9a5 YH |
680 | struct net_bridge_port *port, |
681 | struct br_ip *group) | |
eb1d1641 HX |
682 | { |
683 | struct net_bridge_mdb_entry *mp; | |
684 | struct net_bridge_port_group *p; | |
e8051688 | 685 | struct net_bridge_port_group __rcu **pp; |
454594f3 | 686 | unsigned long now = jiffies; |
eb1d1641 HX |
687 | int err; |
688 | ||
eb1d1641 HX |
689 | spin_lock(&br->multicast_lock); |
690 | if (!netif_running(br->dev) || | |
691 | (port && port->state == BR_STATE_DISABLED)) | |
692 | goto out; | |
693 | ||
694 | mp = br_multicast_new_group(br, port, group); | |
695 | err = PTR_ERR(mp); | |
4c0833bc | 696 | if (IS_ERR(mp)) |
eb1d1641 HX |
697 | goto err; |
698 | ||
699 | if (!port) { | |
8a870178 | 700 | mp->mglist = true; |
454594f3 | 701 | mod_timer(&mp->timer, now + br->multicast_membership_interval); |
eb1d1641 HX |
702 | goto out; |
703 | } | |
704 | ||
e8051688 ED |
705 | for (pp = &mp->ports; |
706 | (p = mlock_dereference(*pp, br)) != NULL; | |
707 | pp = &p->next) { | |
eb1d1641 | 708 | if (p->port == port) |
454594f3 | 709 | goto found; |
eb1d1641 HX |
710 | if ((unsigned long)p->port < (unsigned long)port) |
711 | break; | |
712 | } | |
713 | ||
9d06b6d8 | 714 | p = br_multicast_new_port_group(port, group, *pp, 0); |
eb1d1641 HX |
715 | if (unlikely(!p)) |
716 | goto err; | |
eb1d1641 | 717 | rcu_assign_pointer(*pp, p); |
45ebcce5 | 718 | br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0); |
eb1d1641 | 719 | |
454594f3 LL |
720 | found: |
721 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
eb1d1641 HX |
722 | out: |
723 | err = 0; | |
724 | ||
725 | err: | |
726 | spin_unlock(&br->multicast_lock); | |
727 | return err; | |
728 | } | |
729 | ||
8ef2a9a5 YH |
730 | static int br_ip4_multicast_add_group(struct net_bridge *br, |
731 | struct net_bridge_port *port, | |
b0e9a30d VY |
732 | __be32 group, |
733 | __u16 vid) | |
8ef2a9a5 YH |
734 | { |
735 | struct br_ip br_group; | |
736 | ||
737 | if (ipv4_is_local_multicast(group)) | |
738 | return 0; | |
739 | ||
740 | br_group.u.ip4 = group; | |
741 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 742 | br_group.vid = vid; |
8ef2a9a5 YH |
743 | |
744 | return br_multicast_add_group(br, port, &br_group); | |
745 | } | |
746 | ||
dfd56b8b | 747 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
748 | static int br_ip6_multicast_add_group(struct net_bridge *br, |
749 | struct net_bridge_port *port, | |
b0e9a30d VY |
750 | const struct in6_addr *group, |
751 | __u16 vid) | |
08b202b6 YH |
752 | { |
753 | struct br_ip br_group; | |
754 | ||
3c3769e6 | 755 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
756 | return 0; |
757 | ||
4e3fd7a0 | 758 | br_group.u.ip6 = *group; |
9cc6e0c4 | 759 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 760 | br_group.vid = vid; |
08b202b6 YH |
761 | |
762 | return br_multicast_add_group(br, port, &br_group); | |
763 | } | |
764 | #endif | |
765 | ||
eb1d1641 HX |
766 | static void br_multicast_router_expired(unsigned long data) |
767 | { | |
768 | struct net_bridge_port *port = (void *)data; | |
769 | struct net_bridge *br = port->br; | |
770 | ||
771 | spin_lock(&br->multicast_lock); | |
a55d8246 NA |
772 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
773 | port->multicast_router == MDB_RTR_TYPE_PERM || | |
eb1d1641 HX |
774 | timer_pending(&port->multicast_router_timer) || |
775 | hlist_unhashed(&port->rlist)) | |
776 | goto out; | |
777 | ||
778 | hlist_del_init_rcu(&port->rlist); | |
949f1e39 | 779 | br_rtr_notify(br->dev, port, RTM_DELMDB); |
a55d8246 NA |
780 | /* Don't allow timer refresh if the router expired */ |
781 | if (port->multicast_router == MDB_RTR_TYPE_TEMP) | |
782 | port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
eb1d1641 HX |
783 | |
784 | out: | |
785 | spin_unlock(&br->multicast_lock); | |
786 | } | |
787 | ||
788 | static void br_multicast_local_router_expired(unsigned long data) | |
789 | { | |
790 | } | |
791 | ||
cc0fdd80 | 792 | static void br_multicast_querier_expired(struct net_bridge *br, |
90010b36 | 793 | struct bridge_mcast_own_query *query) |
c83b8fab | 794 | { |
c83b8fab HX |
795 | spin_lock(&br->multicast_lock); |
796 | if (!netif_running(br->dev) || br->multicast_disabled) | |
797 | goto out; | |
798 | ||
cc0fdd80 | 799 | br_multicast_start_querier(br, query); |
c83b8fab HX |
800 | |
801 | out: | |
802 | spin_unlock(&br->multicast_lock); | |
803 | } | |
804 | ||
cc0fdd80 LL |
805 | static void br_ip4_multicast_querier_expired(unsigned long data) |
806 | { | |
807 | struct net_bridge *br = (void *)data; | |
808 | ||
90010b36 | 809 | br_multicast_querier_expired(br, &br->ip4_own_query); |
cc0fdd80 LL |
810 | } |
811 | ||
812 | #if IS_ENABLED(CONFIG_IPV6) | |
813 | static void br_ip6_multicast_querier_expired(unsigned long data) | |
814 | { | |
815 | struct net_bridge *br = (void *)data; | |
816 | ||
90010b36 | 817 | br_multicast_querier_expired(br, &br->ip6_own_query); |
cc0fdd80 LL |
818 | } |
819 | #endif | |
820 | ||
dc4eb53a LL |
821 | static void br_multicast_select_own_querier(struct net_bridge *br, |
822 | struct br_ip *ip, | |
823 | struct sk_buff *skb) | |
824 | { | |
825 | if (ip->proto == htons(ETH_P_IP)) | |
826 | br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr; | |
827 | #if IS_ENABLED(CONFIG_IPV6) | |
828 | else | |
829 | br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr; | |
830 | #endif | |
831 | } | |
832 | ||
8ef2a9a5 YH |
833 | static void __br_multicast_send_query(struct net_bridge *br, |
834 | struct net_bridge_port *port, | |
835 | struct br_ip *ip) | |
eb1d1641 | 836 | { |
eb1d1641 | 837 | struct sk_buff *skb; |
1080ab95 | 838 | u8 igmp_type; |
eb1d1641 | 839 | |
1080ab95 | 840 | skb = br_multicast_alloc_query(br, ip, &igmp_type); |
eb1d1641 | 841 | if (!skb) |
8ef2a9a5 | 842 | return; |
eb1d1641 HX |
843 | |
844 | if (port) { | |
eb1d1641 | 845 | skb->dev = port->dev; |
a65056ec | 846 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 847 | BR_MCAST_DIR_TX); |
29a26a56 EB |
848 | NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, |
849 | dev_net(port->dev), NULL, skb, NULL, skb->dev, | |
f0b4eece | 850 | br_dev_queue_push_xmit); |
dc4eb53a LL |
851 | } else { |
852 | br_multicast_select_own_querier(br, ip, skb); | |
a65056ec | 853 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 854 | BR_MCAST_DIR_RX); |
eb1d1641 | 855 | netif_rx(skb); |
dc4eb53a | 856 | } |
8ef2a9a5 YH |
857 | } |
858 | ||
859 | static void br_multicast_send_query(struct net_bridge *br, | |
cc0fdd80 | 860 | struct net_bridge_port *port, |
90010b36 | 861 | struct bridge_mcast_own_query *own_query) |
8ef2a9a5 YH |
862 | { |
863 | unsigned long time; | |
864 | struct br_ip br_group; | |
90010b36 | 865 | struct bridge_mcast_other_query *other_query = NULL; |
8ef2a9a5 YH |
866 | |
867 | if (!netif_running(br->dev) || br->multicast_disabled || | |
cc0fdd80 | 868 | !br->multicast_querier) |
8ef2a9a5 YH |
869 | return; |
870 | ||
08b202b6 YH |
871 | memset(&br_group.u, 0, sizeof(br_group.u)); |
872 | ||
90010b36 LL |
873 | if (port ? (own_query == &port->ip4_own_query) : |
874 | (own_query == &br->ip4_own_query)) { | |
875 | other_query = &br->ip4_other_query; | |
cc0fdd80 | 876 | br_group.proto = htons(ETH_P_IP); |
dfd56b8b | 877 | #if IS_ENABLED(CONFIG_IPV6) |
cc0fdd80 | 878 | } else { |
90010b36 | 879 | other_query = &br->ip6_other_query; |
cc0fdd80 | 880 | br_group.proto = htons(ETH_P_IPV6); |
08b202b6 | 881 | #endif |
cc0fdd80 LL |
882 | } |
883 | ||
90010b36 | 884 | if (!other_query || timer_pending(&other_query->timer)) |
cc0fdd80 LL |
885 | return; |
886 | ||
887 | __br_multicast_send_query(br, port, &br_group); | |
eb1d1641 | 888 | |
eb1d1641 | 889 | time = jiffies; |
90010b36 | 890 | time += own_query->startup_sent < br->multicast_startup_query_count ? |
eb1d1641 HX |
891 | br->multicast_startup_query_interval : |
892 | br->multicast_query_interval; | |
90010b36 | 893 | mod_timer(&own_query->timer, time); |
eb1d1641 HX |
894 | } |
895 | ||
90010b36 LL |
896 | static void |
897 | br_multicast_port_query_expired(struct net_bridge_port *port, | |
898 | struct bridge_mcast_own_query *query) | |
eb1d1641 | 899 | { |
eb1d1641 HX |
900 | struct net_bridge *br = port->br; |
901 | ||
902 | spin_lock(&br->multicast_lock); | |
02a780c0 DC |
903 | if (port->state == BR_STATE_DISABLED || |
904 | port->state == BR_STATE_BLOCKING) | |
eb1d1641 HX |
905 | goto out; |
906 | ||
cc0fdd80 LL |
907 | if (query->startup_sent < br->multicast_startup_query_count) |
908 | query->startup_sent++; | |
eb1d1641 | 909 | |
cc0fdd80 | 910 | br_multicast_send_query(port->br, port, query); |
eb1d1641 HX |
911 | |
912 | out: | |
913 | spin_unlock(&br->multicast_lock); | |
914 | } | |
915 | ||
cc0fdd80 LL |
916 | static void br_ip4_multicast_port_query_expired(unsigned long data) |
917 | { | |
918 | struct net_bridge_port *port = (void *)data; | |
919 | ||
90010b36 | 920 | br_multicast_port_query_expired(port, &port->ip4_own_query); |
cc0fdd80 LL |
921 | } |
922 | ||
923 | #if IS_ENABLED(CONFIG_IPV6) | |
924 | static void br_ip6_multicast_port_query_expired(unsigned long data) | |
925 | { | |
926 | struct net_bridge_port *port = (void *)data; | |
927 | ||
90010b36 | 928 | br_multicast_port_query_expired(port, &port->ip6_own_query); |
cc0fdd80 LL |
929 | } |
930 | #endif | |
931 | ||
1080ab95 | 932 | int br_multicast_add_port(struct net_bridge_port *port) |
eb1d1641 | 933 | { |
7f0aec7a | 934 | port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
eb1d1641 HX |
935 | |
936 | setup_timer(&port->multicast_router_timer, br_multicast_router_expired, | |
937 | (unsigned long)port); | |
90010b36 LL |
938 | setup_timer(&port->ip4_own_query.timer, |
939 | br_ip4_multicast_port_query_expired, (unsigned long)port); | |
cc0fdd80 | 940 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 LL |
941 | setup_timer(&port->ip6_own_query.timer, |
942 | br_ip6_multicast_port_query_expired, (unsigned long)port); | |
cc0fdd80 | 943 | #endif |
1080ab95 NA |
944 | port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); |
945 | if (!port->mcast_stats) | |
946 | return -ENOMEM; | |
947 | ||
948 | return 0; | |
eb1d1641 HX |
949 | } |
950 | ||
951 | void br_multicast_del_port(struct net_bridge_port *port) | |
952 | { | |
e10177ab SA |
953 | struct net_bridge *br = port->br; |
954 | struct net_bridge_port_group *pg; | |
955 | struct hlist_node *n; | |
956 | ||
957 | /* Take care of the remaining groups, only perm ones should be left */ | |
958 | spin_lock_bh(&br->multicast_lock); | |
959 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) | |
960 | br_multicast_del_pg(br, pg); | |
961 | spin_unlock_bh(&br->multicast_lock); | |
eb1d1641 | 962 | del_timer_sync(&port->multicast_router_timer); |
1080ab95 | 963 | free_percpu(port->mcast_stats); |
eb1d1641 HX |
964 | } |
965 | ||
90010b36 | 966 | static void br_multicast_enable(struct bridge_mcast_own_query *query) |
561f1103 | 967 | { |
cc0fdd80 | 968 | query->startup_sent = 0; |
561f1103 | 969 | |
cc0fdd80 LL |
970 | if (try_to_del_timer_sync(&query->timer) >= 0 || |
971 | del_timer(&query->timer)) | |
972 | mod_timer(&query->timer, jiffies); | |
561f1103 HX |
973 | } |
974 | ||
7cb3f921 | 975 | static void __br_multicast_enable_port(struct net_bridge_port *port) |
eb1d1641 HX |
976 | { |
977 | struct net_bridge *br = port->br; | |
978 | ||
eb1d1641 | 979 | if (br->multicast_disabled || !netif_running(br->dev)) |
7cb3f921 | 980 | return; |
eb1d1641 | 981 | |
90010b36 | 982 | br_multicast_enable(&port->ip4_own_query); |
cc0fdd80 | 983 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 984 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 985 | #endif |
7f0aec7a NA |
986 | if (port->multicast_router == MDB_RTR_TYPE_PERM && |
987 | hlist_unhashed(&port->rlist)) | |
754bc547 | 988 | br_multicast_add_router(br, port); |
7cb3f921 | 989 | } |
eb1d1641 | 990 | |
7cb3f921 NA |
991 | void br_multicast_enable_port(struct net_bridge_port *port) |
992 | { | |
993 | struct net_bridge *br = port->br; | |
994 | ||
995 | spin_lock(&br->multicast_lock); | |
996 | __br_multicast_enable_port(port); | |
eb1d1641 HX |
997 | spin_unlock(&br->multicast_lock); |
998 | } | |
999 | ||
1000 | void br_multicast_disable_port(struct net_bridge_port *port) | |
1001 | { | |
1002 | struct net_bridge *br = port->br; | |
1003 | struct net_bridge_port_group *pg; | |
b67bfe0d | 1004 | struct hlist_node *n; |
eb1d1641 HX |
1005 | |
1006 | spin_lock(&br->multicast_lock); | |
b67bfe0d | 1007 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) |
9d06b6d8 | 1008 | if (!(pg->flags & MDB_PG_FLAGS_PERMANENT)) |
e10177ab | 1009 | br_multicast_del_pg(br, pg); |
eb1d1641 | 1010 | |
949f1e39 | 1011 | if (!hlist_unhashed(&port->rlist)) { |
eb1d1641 | 1012 | hlist_del_init_rcu(&port->rlist); |
949f1e39 | 1013 | br_rtr_notify(br->dev, port, RTM_DELMDB); |
a55d8246 NA |
1014 | /* Don't allow timer refresh if disabling */ |
1015 | if (port->multicast_router == MDB_RTR_TYPE_TEMP) | |
1016 | port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
949f1e39 | 1017 | } |
eb1d1641 | 1018 | del_timer(&port->multicast_router_timer); |
90010b36 | 1019 | del_timer(&port->ip4_own_query.timer); |
cc0fdd80 | 1020 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1021 | del_timer(&port->ip6_own_query.timer); |
cc0fdd80 | 1022 | #endif |
eb1d1641 HX |
1023 | spin_unlock(&br->multicast_lock); |
1024 | } | |
1025 | ||
8ef2a9a5 YH |
1026 | static int br_ip4_multicast_igmp3_report(struct net_bridge *br, |
1027 | struct net_bridge_port *port, | |
06499098 VY |
1028 | struct sk_buff *skb, |
1029 | u16 vid) | |
eb1d1641 HX |
1030 | { |
1031 | struct igmpv3_report *ih; | |
1032 | struct igmpv3_grec *grec; | |
1033 | int i; | |
1034 | int len; | |
1035 | int num; | |
1036 | int type; | |
1037 | int err = 0; | |
1038 | __be32 group; | |
1039 | ||
eb1d1641 HX |
1040 | ih = igmpv3_report_hdr(skb); |
1041 | num = ntohs(ih->ngrec); | |
c2d4fbd2 | 1042 | len = skb_transport_offset(skb) + sizeof(*ih); |
eb1d1641 HX |
1043 | |
1044 | for (i = 0; i < num; i++) { | |
1045 | len += sizeof(*grec); | |
1046 | if (!pskb_may_pull(skb, len)) | |
1047 | return -EINVAL; | |
1048 | ||
fd218cf9 | 1049 | grec = (void *)(skb->data + len - sizeof(*grec)); |
eb1d1641 HX |
1050 | group = grec->grec_mca; |
1051 | type = grec->grec_type; | |
1052 | ||
8eabf95c | 1053 | len += ntohs(grec->grec_nsrcs) * 4; |
eb1d1641 HX |
1054 | if (!pskb_may_pull(skb, len)) |
1055 | return -EINVAL; | |
1056 | ||
1057 | /* We treat this as an IGMPv2 report for now. */ | |
1058 | switch (type) { | |
1059 | case IGMPV3_MODE_IS_INCLUDE: | |
1060 | case IGMPV3_MODE_IS_EXCLUDE: | |
1061 | case IGMPV3_CHANGE_TO_INCLUDE: | |
1062 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
1063 | case IGMPV3_ALLOW_NEW_SOURCES: | |
1064 | case IGMPV3_BLOCK_OLD_SOURCES: | |
1065 | break; | |
1066 | ||
1067 | default: | |
1068 | continue; | |
1069 | } | |
1070 | ||
bc8c20ac SA |
1071 | if ((type == IGMPV3_CHANGE_TO_INCLUDE || |
1072 | type == IGMPV3_MODE_IS_INCLUDE) && | |
1073 | ntohs(grec->grec_nsrcs) == 0) { | |
1074 | br_ip4_multicast_leave_group(br, port, group, vid); | |
1075 | } else { | |
1076 | err = br_ip4_multicast_add_group(br, port, group, vid); | |
1077 | if (err) | |
1078 | break; | |
1079 | } | |
eb1d1641 HX |
1080 | } |
1081 | ||
1082 | return err; | |
1083 | } | |
1084 | ||
dfd56b8b | 1085 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1086 | static int br_ip6_multicast_mld2_report(struct net_bridge *br, |
1087 | struct net_bridge_port *port, | |
06499098 VY |
1088 | struct sk_buff *skb, |
1089 | u16 vid) | |
08b202b6 YH |
1090 | { |
1091 | struct icmp6hdr *icmp6h; | |
1092 | struct mld2_grec *grec; | |
1093 | int i; | |
1094 | int len; | |
1095 | int num; | |
1096 | int err = 0; | |
1097 | ||
1098 | if (!pskb_may_pull(skb, sizeof(*icmp6h))) | |
1099 | return -EINVAL; | |
1100 | ||
1101 | icmp6h = icmp6_hdr(skb); | |
1102 | num = ntohs(icmp6h->icmp6_dataun.un_data16[1]); | |
c2d4fbd2 | 1103 | len = skb_transport_offset(skb) + sizeof(*icmp6h); |
08b202b6 YH |
1104 | |
1105 | for (i = 0; i < num; i++) { | |
1106 | __be16 *nsrcs, _nsrcs; | |
1107 | ||
1108 | nsrcs = skb_header_pointer(skb, | |
1109 | len + offsetof(struct mld2_grec, | |
649e984d | 1110 | grec_nsrcs), |
08b202b6 YH |
1111 | sizeof(_nsrcs), &_nsrcs); |
1112 | if (!nsrcs) | |
1113 | return -EINVAL; | |
1114 | ||
1115 | if (!pskb_may_pull(skb, | |
1116 | len + sizeof(*grec) + | |
d41db9f3 | 1117 | sizeof(struct in6_addr) * ntohs(*nsrcs))) |
08b202b6 YH |
1118 | return -EINVAL; |
1119 | ||
1120 | grec = (struct mld2_grec *)(skb->data + len); | |
d41db9f3 LL |
1121 | len += sizeof(*grec) + |
1122 | sizeof(struct in6_addr) * ntohs(*nsrcs); | |
08b202b6 YH |
1123 | |
1124 | /* We treat these as MLDv1 reports for now. */ | |
1125 | switch (grec->grec_type) { | |
1126 | case MLD2_MODE_IS_INCLUDE: | |
1127 | case MLD2_MODE_IS_EXCLUDE: | |
1128 | case MLD2_CHANGE_TO_INCLUDE: | |
1129 | case MLD2_CHANGE_TO_EXCLUDE: | |
1130 | case MLD2_ALLOW_NEW_SOURCES: | |
1131 | case MLD2_BLOCK_OLD_SOURCES: | |
1132 | break; | |
1133 | ||
1134 | default: | |
1135 | continue; | |
1136 | } | |
1137 | ||
bc8c20ac SA |
1138 | if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE || |
1139 | grec->grec_type == MLD2_MODE_IS_INCLUDE) && | |
1140 | ntohs(*nsrcs) == 0) { | |
1141 | br_ip6_multicast_leave_group(br, port, &grec->grec_mca, | |
1142 | vid); | |
1143 | } else { | |
1144 | err = br_ip6_multicast_add_group(br, port, | |
1145 | &grec->grec_mca, vid); | |
9264251e | 1146 | if (err) |
bc8c20ac SA |
1147 | break; |
1148 | } | |
08b202b6 YH |
1149 | } |
1150 | ||
1151 | return err; | |
1152 | } | |
1153 | #endif | |
1154 | ||
dc4eb53a | 1155 | static bool br_ip4_multicast_select_querier(struct net_bridge *br, |
2cd41431 | 1156 | struct net_bridge_port *port, |
dc4eb53a LL |
1157 | __be32 saddr) |
1158 | { | |
1159 | if (!timer_pending(&br->ip4_own_query.timer) && | |
1160 | !timer_pending(&br->ip4_other_query.timer)) | |
1161 | goto update; | |
1162 | ||
1163 | if (!br->ip4_querier.addr.u.ip4) | |
1164 | goto update; | |
1165 | ||
1166 | if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4)) | |
1167 | goto update; | |
1168 | ||
1169 | return false; | |
1170 | ||
1171 | update: | |
1172 | br->ip4_querier.addr.u.ip4 = saddr; | |
1173 | ||
2cd41431 LL |
1174 | /* update protected by general multicast_lock by caller */ |
1175 | rcu_assign_pointer(br->ip4_querier.port, port); | |
1176 | ||
dc4eb53a LL |
1177 | return true; |
1178 | } | |
1179 | ||
1180 | #if IS_ENABLED(CONFIG_IPV6) | |
1181 | static bool br_ip6_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1182 | struct net_bridge_port *port, |
dc4eb53a LL |
1183 | struct in6_addr *saddr) |
1184 | { | |
1185 | if (!timer_pending(&br->ip6_own_query.timer) && | |
1186 | !timer_pending(&br->ip6_other_query.timer)) | |
1187 | goto update; | |
1188 | ||
1189 | if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0) | |
1190 | goto update; | |
1191 | ||
1192 | return false; | |
1193 | ||
1194 | update: | |
1195 | br->ip6_querier.addr.u.ip6 = *saddr; | |
1196 | ||
2cd41431 LL |
1197 | /* update protected by general multicast_lock by caller */ |
1198 | rcu_assign_pointer(br->ip6_querier.port, port); | |
1199 | ||
dc4eb53a LL |
1200 | return true; |
1201 | } | |
1202 | #endif | |
1203 | ||
1204 | static bool br_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1205 | struct net_bridge_port *port, |
dc4eb53a LL |
1206 | struct br_ip *saddr) |
1207 | { | |
1208 | switch (saddr->proto) { | |
1209 | case htons(ETH_P_IP): | |
2cd41431 | 1210 | return br_ip4_multicast_select_querier(br, port, saddr->u.ip4); |
dc4eb53a LL |
1211 | #if IS_ENABLED(CONFIG_IPV6) |
1212 | case htons(ETH_P_IPV6): | |
2cd41431 | 1213 | return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6); |
dc4eb53a LL |
1214 | #endif |
1215 | } | |
1216 | ||
1217 | return false; | |
1218 | } | |
1219 | ||
cc0fdd80 | 1220 | static void |
90010b36 LL |
1221 | br_multicast_update_query_timer(struct net_bridge *br, |
1222 | struct bridge_mcast_other_query *query, | |
1223 | unsigned long max_delay) | |
b00589af | 1224 | { |
90010b36 LL |
1225 | if (!timer_pending(&query->timer)) |
1226 | query->delay_time = jiffies + max_delay; | |
b00589af | 1227 | |
90010b36 | 1228 | mod_timer(&query->timer, jiffies + br->multicast_querier_interval); |
b00589af LL |
1229 | } |
1230 | ||
7e80c124 | 1231 | /* |
7c77602f | 1232 | * Add port to router_list |
7e80c124 | 1233 | * list is maintained ordered by pointer value |
1234 | * and locked by br->multicast_lock and RCU | |
1235 | */ | |
0909e117 HX |
1236 | static void br_multicast_add_router(struct net_bridge *br, |
1237 | struct net_bridge_port *port) | |
1238 | { | |
dcdca2c4 | 1239 | struct net_bridge_port *p; |
b67bfe0d | 1240 | struct hlist_node *slot = NULL; |
dcdca2c4 | 1241 | |
1a040eac NA |
1242 | if (!hlist_unhashed(&port->rlist)) |
1243 | return; | |
1244 | ||
b67bfe0d | 1245 | hlist_for_each_entry(p, &br->router_list, rlist) { |
7e80c124 | 1246 | if ((unsigned long) port >= (unsigned long) p) |
1247 | break; | |
b67bfe0d | 1248 | slot = &p->rlist; |
dcdca2c4 | 1249 | } |
1250 | ||
7e80c124 | 1251 | if (slot) |
1d023284 | 1252 | hlist_add_behind_rcu(&port->rlist, slot); |
dcdca2c4 | 1253 | else |
1254 | hlist_add_head_rcu(&port->rlist, &br->router_list); | |
949f1e39 | 1255 | br_rtr_notify(br->dev, port, RTM_NEWMDB); |
0909e117 HX |
1256 | } |
1257 | ||
eb1d1641 HX |
1258 | static void br_multicast_mark_router(struct net_bridge *br, |
1259 | struct net_bridge_port *port) | |
1260 | { | |
1261 | unsigned long now = jiffies; | |
eb1d1641 HX |
1262 | |
1263 | if (!port) { | |
7f0aec7a | 1264 | if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) |
eb1d1641 HX |
1265 | mod_timer(&br->multicast_router_timer, |
1266 | now + br->multicast_querier_interval); | |
1267 | return; | |
1268 | } | |
1269 | ||
a55d8246 NA |
1270 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
1271 | port->multicast_router == MDB_RTR_TYPE_PERM) | |
eb1d1641 HX |
1272 | return; |
1273 | ||
0909e117 | 1274 | br_multicast_add_router(br, port); |
eb1d1641 | 1275 | |
eb1d1641 HX |
1276 | mod_timer(&port->multicast_router_timer, |
1277 | now + br->multicast_querier_interval); | |
1278 | } | |
1279 | ||
1280 | static void br_multicast_query_received(struct net_bridge *br, | |
1281 | struct net_bridge_port *port, | |
90010b36 | 1282 | struct bridge_mcast_other_query *query, |
dc4eb53a | 1283 | struct br_ip *saddr, |
b00589af | 1284 | unsigned long max_delay) |
eb1d1641 | 1285 | { |
2cd41431 | 1286 | if (!br_multicast_select_querier(br, port, saddr)) |
eb1d1641 HX |
1287 | return; |
1288 | ||
dc4eb53a | 1289 | br_multicast_update_query_timer(br, query, max_delay); |
eb1d1641 HX |
1290 | br_multicast_mark_router(br, port); |
1291 | } | |
1292 | ||
8ef2a9a5 YH |
1293 | static int br_ip4_multicast_query(struct net_bridge *br, |
1294 | struct net_bridge_port *port, | |
06499098 VY |
1295 | struct sk_buff *skb, |
1296 | u16 vid) | |
eb1d1641 | 1297 | { |
b71d1d42 | 1298 | const struct iphdr *iph = ip_hdr(skb); |
eb1d1641 HX |
1299 | struct igmphdr *ih = igmp_hdr(skb); |
1300 | struct net_bridge_mdb_entry *mp; | |
1301 | struct igmpv3_query *ih3; | |
1302 | struct net_bridge_port_group *p; | |
e8051688 | 1303 | struct net_bridge_port_group __rcu **pp; |
dc4eb53a | 1304 | struct br_ip saddr; |
eb1d1641 HX |
1305 | unsigned long max_delay; |
1306 | unsigned long now = jiffies; | |
856ce5d0 | 1307 | unsigned int offset = skb_transport_offset(skb); |
eb1d1641 | 1308 | __be32 group; |
bec68ff1 | 1309 | int err = 0; |
eb1d1641 HX |
1310 | |
1311 | spin_lock(&br->multicast_lock); | |
1312 | if (!netif_running(br->dev) || | |
1313 | (port && port->state == BR_STATE_DISABLED)) | |
1314 | goto out; | |
1315 | ||
eb1d1641 HX |
1316 | group = ih->group; |
1317 | ||
856ce5d0 | 1318 | if (skb->len == offset + sizeof(*ih)) { |
eb1d1641 HX |
1319 | max_delay = ih->code * (HZ / IGMP_TIMER_SCALE); |
1320 | ||
1321 | if (!max_delay) { | |
1322 | max_delay = 10 * HZ; | |
1323 | group = 0; | |
1324 | } | |
856ce5d0 | 1325 | } else if (skb->len >= offset + sizeof(*ih3)) { |
eb1d1641 HX |
1326 | ih3 = igmpv3_query_hdr(skb); |
1327 | if (ih3->nsrcs) | |
bec68ff1 | 1328 | goto out; |
eb1d1641 | 1329 | |
0ba8c9ec YH |
1330 | max_delay = ih3->code ? |
1331 | IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1; | |
9afd85c9 | 1332 | } else { |
9ed973cc LL |
1333 | goto out; |
1334 | } | |
1335 | ||
dc4eb53a LL |
1336 | if (!group) { |
1337 | saddr.proto = htons(ETH_P_IP); | |
1338 | saddr.u.ip4 = iph->saddr; | |
b00589af | 1339 | |
dc4eb53a LL |
1340 | br_multicast_query_received(br, port, &br->ip4_other_query, |
1341 | &saddr, max_delay); | |
eb1d1641 | 1342 | goto out; |
dc4eb53a | 1343 | } |
eb1d1641 | 1344 | |
b0e9a30d | 1345 | mp = br_mdb_ip4_get(mlock_dereference(br->mdb, br), group, vid); |
eb1d1641 HX |
1346 | if (!mp) |
1347 | goto out; | |
1348 | ||
1349 | max_delay *= br->multicast_last_member_count; | |
1350 | ||
8a870178 | 1351 | if (mp->mglist && |
eb1d1641 HX |
1352 | (timer_pending(&mp->timer) ? |
1353 | time_after(mp->timer.expires, now + max_delay) : | |
1354 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1355 | mod_timer(&mp->timer, now + max_delay); | |
1356 | ||
e8051688 ED |
1357 | for (pp = &mp->ports; |
1358 | (p = mlock_dereference(*pp, br)) != NULL; | |
1359 | pp = &p->next) { | |
eb1d1641 HX |
1360 | if (timer_pending(&p->timer) ? |
1361 | time_after(p->timer.expires, now + max_delay) : | |
1362 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1363 | mod_timer(&p->timer, now + max_delay); |
eb1d1641 HX |
1364 | } |
1365 | ||
1366 | out: | |
1367 | spin_unlock(&br->multicast_lock); | |
bec68ff1 | 1368 | return err; |
eb1d1641 HX |
1369 | } |
1370 | ||
dfd56b8b | 1371 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1372 | static int br_ip6_multicast_query(struct net_bridge *br, |
1373 | struct net_bridge_port *port, | |
06499098 VY |
1374 | struct sk_buff *skb, |
1375 | u16 vid) | |
08b202b6 | 1376 | { |
b71d1d42 | 1377 | const struct ipv6hdr *ip6h = ipv6_hdr(skb); |
eca2a43b | 1378 | struct mld_msg *mld; |
08b202b6 YH |
1379 | struct net_bridge_mdb_entry *mp; |
1380 | struct mld2_query *mld2q; | |
e8051688 ED |
1381 | struct net_bridge_port_group *p; |
1382 | struct net_bridge_port_group __rcu **pp; | |
dc4eb53a | 1383 | struct br_ip saddr; |
08b202b6 YH |
1384 | unsigned long max_delay; |
1385 | unsigned long now = jiffies; | |
856ce5d0 | 1386 | unsigned int offset = skb_transport_offset(skb); |
b71d1d42 | 1387 | const struct in6_addr *group = NULL; |
9ed973cc | 1388 | bool is_general_query; |
08b202b6 YH |
1389 | int err = 0; |
1390 | ||
1391 | spin_lock(&br->multicast_lock); | |
1392 | if (!netif_running(br->dev) || | |
1393 | (port && port->state == BR_STATE_DISABLED)) | |
1394 | goto out; | |
1395 | ||
856ce5d0 LL |
1396 | if (skb->len == offset + sizeof(*mld)) { |
1397 | if (!pskb_may_pull(skb, offset + sizeof(*mld))) { | |
08b202b6 YH |
1398 | err = -EINVAL; |
1399 | goto out; | |
1400 | } | |
1401 | mld = (struct mld_msg *) icmp6_hdr(skb); | |
4715213d | 1402 | max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay)); |
08b202b6 YH |
1403 | if (max_delay) |
1404 | group = &mld->mld_mca; | |
248ba8ec | 1405 | } else { |
856ce5d0 | 1406 | if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) { |
08b202b6 YH |
1407 | err = -EINVAL; |
1408 | goto out; | |
1409 | } | |
1410 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
1411 | if (!mld2q->mld2q_nsrcs) | |
1412 | group = &mld2q->mld2q_mca; | |
e3f5b170 DB |
1413 | |
1414 | max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL); | |
08b202b6 YH |
1415 | } |
1416 | ||
9ed973cc LL |
1417 | is_general_query = group && ipv6_addr_any(group); |
1418 | ||
dc4eb53a LL |
1419 | if (is_general_query) { |
1420 | saddr.proto = htons(ETH_P_IPV6); | |
1421 | saddr.u.ip6 = ip6h->saddr; | |
b00589af | 1422 | |
dc4eb53a LL |
1423 | br_multicast_query_received(br, port, &br->ip6_other_query, |
1424 | &saddr, max_delay); | |
08b202b6 | 1425 | goto out; |
6c03ee8b LL |
1426 | } else if (!group) { |
1427 | goto out; | |
dc4eb53a | 1428 | } |
08b202b6 | 1429 | |
b0e9a30d | 1430 | mp = br_mdb_ip6_get(mlock_dereference(br->mdb, br), group, vid); |
08b202b6 YH |
1431 | if (!mp) |
1432 | goto out; | |
1433 | ||
1434 | max_delay *= br->multicast_last_member_count; | |
8a870178 | 1435 | if (mp->mglist && |
08b202b6 YH |
1436 | (timer_pending(&mp->timer) ? |
1437 | time_after(mp->timer.expires, now + max_delay) : | |
1438 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1439 | mod_timer(&mp->timer, now + max_delay); | |
1440 | ||
e8051688 ED |
1441 | for (pp = &mp->ports; |
1442 | (p = mlock_dereference(*pp, br)) != NULL; | |
1443 | pp = &p->next) { | |
08b202b6 YH |
1444 | if (timer_pending(&p->timer) ? |
1445 | time_after(p->timer.expires, now + max_delay) : | |
1446 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1447 | mod_timer(&p->timer, now + max_delay); |
08b202b6 YH |
1448 | } |
1449 | ||
1450 | out: | |
1451 | spin_unlock(&br->multicast_lock); | |
1452 | return err; | |
1453 | } | |
1454 | #endif | |
1455 | ||
90010b36 LL |
1456 | static void |
1457 | br_multicast_leave_group(struct net_bridge *br, | |
1458 | struct net_bridge_port *port, | |
1459 | struct br_ip *group, | |
1460 | struct bridge_mcast_other_query *other_query, | |
1461 | struct bridge_mcast_own_query *own_query) | |
eb1d1641 HX |
1462 | { |
1463 | struct net_bridge_mdb_htable *mdb; | |
1464 | struct net_bridge_mdb_entry *mp; | |
1465 | struct net_bridge_port_group *p; | |
1466 | unsigned long now; | |
1467 | unsigned long time; | |
1468 | ||
eb1d1641 HX |
1469 | spin_lock(&br->multicast_lock); |
1470 | if (!netif_running(br->dev) || | |
544586f7 | 1471 | (port && port->state == BR_STATE_DISABLED)) |
eb1d1641 HX |
1472 | goto out; |
1473 | ||
e8051688 | 1474 | mdb = mlock_dereference(br->mdb, br); |
eb1d1641 HX |
1475 | mp = br_mdb_ip_get(mdb, group); |
1476 | if (!mp) | |
1477 | goto out; | |
1478 | ||
544586f7 SA |
1479 | if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) { |
1480 | struct net_bridge_port_group __rcu **pp; | |
1481 | ||
1482 | for (pp = &mp->ports; | |
1483 | (p = mlock_dereference(*pp, br)) != NULL; | |
1484 | pp = &p->next) { | |
1485 | if (p->port != port) | |
1486 | continue; | |
1487 | ||
1488 | rcu_assign_pointer(*pp, p->next); | |
1489 | hlist_del_init(&p->mglist); | |
1490 | del_timer(&p->timer); | |
1491 | call_rcu_bh(&p->rcu, br_multicast_free_pg); | |
45ebcce5 ER |
1492 | br_mdb_notify(br->dev, port, group, RTM_DELMDB, |
1493 | p->flags); | |
544586f7 SA |
1494 | |
1495 | if (!mp->ports && !mp->mglist && | |
1496 | netif_running(br->dev)) | |
1497 | mod_timer(&mp->timer, jiffies); | |
1498 | } | |
1499 | goto out; | |
1500 | } | |
1501 | ||
1502 | if (timer_pending(&other_query->timer)) | |
1503 | goto out; | |
1504 | ||
cc0fdd80 | 1505 | if (br->multicast_querier) { |
6b7df111 CW |
1506 | __br_multicast_send_query(br, port, &mp->addr); |
1507 | ||
1508 | time = jiffies + br->multicast_last_member_count * | |
1509 | br->multicast_last_member_interval; | |
cc0fdd80 | 1510 | |
90010b36 | 1511 | mod_timer(&own_query->timer, time); |
6b7df111 CW |
1512 | |
1513 | for (p = mlock_dereference(mp->ports, br); | |
1514 | p != NULL; | |
1515 | p = mlock_dereference(p->next, br)) { | |
1516 | if (p->port != port) | |
1517 | continue; | |
1518 | ||
1519 | if (!hlist_unhashed(&p->mglist) && | |
1520 | (timer_pending(&p->timer) ? | |
1521 | time_after(p->timer.expires, time) : | |
1522 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1523 | mod_timer(&p->timer, time); | |
1524 | } | |
1525 | ||
1526 | break; | |
1527 | } | |
1528 | } | |
1529 | ||
eb1d1641 HX |
1530 | now = jiffies; |
1531 | time = now + br->multicast_last_member_count * | |
1532 | br->multicast_last_member_interval; | |
1533 | ||
1534 | if (!port) { | |
454594f3 | 1535 | if (mp->mglist && |
eb1d1641 HX |
1536 | (timer_pending(&mp->timer) ? |
1537 | time_after(mp->timer.expires, time) : | |
1538 | try_to_del_timer_sync(&mp->timer) >= 0)) { | |
1539 | mod_timer(&mp->timer, time); | |
eb1d1641 | 1540 | } |
454594f3 LL |
1541 | |
1542 | goto out; | |
1543 | } | |
1544 | ||
1545 | for (p = mlock_dereference(mp->ports, br); | |
1546 | p != NULL; | |
1547 | p = mlock_dereference(p->next, br)) { | |
1548 | if (p->port != port) | |
1549 | continue; | |
1550 | ||
1551 | if (!hlist_unhashed(&p->mglist) && | |
1552 | (timer_pending(&p->timer) ? | |
1553 | time_after(p->timer.expires, time) : | |
1554 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1555 | mod_timer(&p->timer, time); | |
1556 | } | |
1557 | ||
1558 | break; | |
eb1d1641 | 1559 | } |
eb1d1641 HX |
1560 | out: |
1561 | spin_unlock(&br->multicast_lock); | |
1562 | } | |
1563 | ||
8ef2a9a5 YH |
1564 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
1565 | struct net_bridge_port *port, | |
b0e9a30d VY |
1566 | __be32 group, |
1567 | __u16 vid) | |
8ef2a9a5 YH |
1568 | { |
1569 | struct br_ip br_group; | |
90010b36 | 1570 | struct bridge_mcast_own_query *own_query; |
8ef2a9a5 YH |
1571 | |
1572 | if (ipv4_is_local_multicast(group)) | |
1573 | return; | |
1574 | ||
90010b36 LL |
1575 | own_query = port ? &port->ip4_own_query : &br->ip4_own_query; |
1576 | ||
8ef2a9a5 YH |
1577 | br_group.u.ip4 = group; |
1578 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 1579 | br_group.vid = vid; |
8ef2a9a5 | 1580 | |
90010b36 LL |
1581 | br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query, |
1582 | own_query); | |
8ef2a9a5 YH |
1583 | } |
1584 | ||
dfd56b8b | 1585 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1586 | static void br_ip6_multicast_leave_group(struct net_bridge *br, |
1587 | struct net_bridge_port *port, | |
b0e9a30d VY |
1588 | const struct in6_addr *group, |
1589 | __u16 vid) | |
08b202b6 YH |
1590 | { |
1591 | struct br_ip br_group; | |
90010b36 | 1592 | struct bridge_mcast_own_query *own_query; |
08b202b6 | 1593 | |
3c3769e6 | 1594 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
1595 | return; |
1596 | ||
90010b36 LL |
1597 | own_query = port ? &port->ip6_own_query : &br->ip6_own_query; |
1598 | ||
4e3fd7a0 | 1599 | br_group.u.ip6 = *group; |
08b202b6 | 1600 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 1601 | br_group.vid = vid; |
08b202b6 | 1602 | |
90010b36 LL |
1603 | br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query, |
1604 | own_query); | |
08b202b6 YH |
1605 | } |
1606 | #endif | |
8ef2a9a5 | 1607 | |
1080ab95 NA |
1608 | static void br_multicast_err_count(const struct net_bridge *br, |
1609 | const struct net_bridge_port *p, | |
1610 | __be16 proto) | |
1611 | { | |
1612 | struct bridge_mcast_stats __percpu *stats; | |
1613 | struct bridge_mcast_stats *pstats; | |
1614 | ||
1615 | if (!br->multicast_stats_enabled) | |
1616 | return; | |
1617 | ||
1618 | if (p) | |
1619 | stats = p->mcast_stats; | |
1620 | else | |
1621 | stats = br->mcast_stats; | |
1622 | if (WARN_ON(!stats)) | |
1623 | return; | |
1624 | ||
1625 | pstats = this_cpu_ptr(stats); | |
1626 | ||
1627 | u64_stats_update_begin(&pstats->syncp); | |
1628 | switch (proto) { | |
1629 | case htons(ETH_P_IP): | |
1630 | pstats->mstats.igmp_parse_errors++; | |
1631 | break; | |
1632 | #if IS_ENABLED(CONFIG_IPV6) | |
1633 | case htons(ETH_P_IPV6): | |
1634 | pstats->mstats.mld_parse_errors++; | |
1635 | break; | |
1636 | #endif | |
1637 | } | |
1638 | u64_stats_update_end(&pstats->syncp); | |
1639 | } | |
1640 | ||
eb1d1641 HX |
1641 | static int br_multicast_ipv4_rcv(struct net_bridge *br, |
1642 | struct net_bridge_port *port, | |
06499098 VY |
1643 | struct sk_buff *skb, |
1644 | u16 vid) | |
eb1d1641 | 1645 | { |
9afd85c9 | 1646 | struct sk_buff *skb_trimmed = NULL; |
eb1d1641 | 1647 | struct igmphdr *ih; |
eb1d1641 HX |
1648 | int err; |
1649 | ||
9afd85c9 | 1650 | err = ip_mc_check_igmp(skb, &skb_trimmed); |
eb1d1641 | 1651 | |
9afd85c9 LL |
1652 | if (err == -ENOMSG) { |
1653 | if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) | |
bd4265fe | 1654 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
eb1d1641 | 1655 | return 0; |
9afd85c9 | 1656 | } else if (err < 0) { |
1080ab95 | 1657 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1658 | return err; |
bd4265fe | 1659 | } |
eb1d1641 | 1660 | |
9afd85c9 | 1661 | ih = igmp_hdr(skb); |
1080ab95 | 1662 | BR_INPUT_SKB_CB(skb)->igmp = ih->type; |
eb1d1641 HX |
1663 | |
1664 | switch (ih->type) { | |
1665 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
1666 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
62b2bcb4 | 1667 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
b0e9a30d | 1668 | err = br_ip4_multicast_add_group(br, port, ih->group, vid); |
eb1d1641 HX |
1669 | break; |
1670 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
9afd85c9 | 1671 | err = br_ip4_multicast_igmp3_report(br, port, skb_trimmed, vid); |
eb1d1641 HX |
1672 | break; |
1673 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
9afd85c9 | 1674 | err = br_ip4_multicast_query(br, port, skb_trimmed, vid); |
eb1d1641 HX |
1675 | break; |
1676 | case IGMP_HOST_LEAVE_MESSAGE: | |
b0e9a30d | 1677 | br_ip4_multicast_leave_group(br, port, ih->group, vid); |
eb1d1641 HX |
1678 | break; |
1679 | } | |
1680 | ||
a516993f | 1681 | if (skb_trimmed && skb_trimmed != skb) |
9afd85c9 LL |
1682 | kfree_skb(skb_trimmed); |
1683 | ||
a65056ec | 1684 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1685 | BR_MCAST_DIR_RX); |
1686 | ||
eb1d1641 HX |
1687 | return err; |
1688 | } | |
1689 | ||
dfd56b8b | 1690 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1691 | static int br_multicast_ipv6_rcv(struct net_bridge *br, |
1692 | struct net_bridge_port *port, | |
06499098 VY |
1693 | struct sk_buff *skb, |
1694 | u16 vid) | |
08b202b6 | 1695 | { |
9afd85c9 LL |
1696 | struct sk_buff *skb_trimmed = NULL; |
1697 | struct mld_msg *mld; | |
08b202b6 YH |
1698 | int err; |
1699 | ||
9afd85c9 | 1700 | err = ipv6_mc_check_mld(skb, &skb_trimmed); |
08b202b6 | 1701 | |
9afd85c9 LL |
1702 | if (err == -ENOMSG) { |
1703 | if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr)) | |
1704 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
08b202b6 | 1705 | return 0; |
9afd85c9 | 1706 | } else if (err < 0) { |
1080ab95 | 1707 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1708 | return err; |
08b202b6 YH |
1709 | } |
1710 | ||
9afd85c9 | 1711 | mld = (struct mld_msg *)skb_transport_header(skb); |
1080ab95 | 1712 | BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type; |
08b202b6 | 1713 | |
9afd85c9 | 1714 | switch (mld->mld_type) { |
08b202b6 | 1715 | case ICMPV6_MGM_REPORT: |
fc2af6c7 | 1716 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
b0e9a30d | 1717 | err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid); |
08b202b6 | 1718 | break; |
08b202b6 | 1719 | case ICMPV6_MLD2_REPORT: |
9afd85c9 | 1720 | err = br_ip6_multicast_mld2_report(br, port, skb_trimmed, vid); |
08b202b6 YH |
1721 | break; |
1722 | case ICMPV6_MGM_QUERY: | |
9afd85c9 | 1723 | err = br_ip6_multicast_query(br, port, skb_trimmed, vid); |
08b202b6 YH |
1724 | break; |
1725 | case ICMPV6_MGM_REDUCTION: | |
b0e9a30d | 1726 | br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid); |
9afd85c9 | 1727 | break; |
08b202b6 YH |
1728 | } |
1729 | ||
a516993f | 1730 | if (skb_trimmed && skb_trimmed != skb) |
9afd85c9 LL |
1731 | kfree_skb(skb_trimmed); |
1732 | ||
a65056ec | 1733 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1734 | BR_MCAST_DIR_RX); |
1735 | ||
08b202b6 YH |
1736 | return err; |
1737 | } | |
1738 | #endif | |
1739 | ||
eb1d1641 | 1740 | int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, |
06499098 | 1741 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 1742 | { |
1080ab95 NA |
1743 | int ret = 0; |
1744 | ||
1fafc7a9 YH |
1745 | BR_INPUT_SKB_CB(skb)->igmp = 0; |
1746 | BR_INPUT_SKB_CB(skb)->mrouters_only = 0; | |
1747 | ||
eb1d1641 HX |
1748 | if (br->multicast_disabled) |
1749 | return 0; | |
1750 | ||
1751 | switch (skb->protocol) { | |
1752 | case htons(ETH_P_IP): | |
1080ab95 NA |
1753 | ret = br_multicast_ipv4_rcv(br, port, skb, vid); |
1754 | break; | |
dfd56b8b | 1755 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 1756 | case htons(ETH_P_IPV6): |
1080ab95 NA |
1757 | ret = br_multicast_ipv6_rcv(br, port, skb, vid); |
1758 | break; | |
08b202b6 | 1759 | #endif |
eb1d1641 HX |
1760 | } |
1761 | ||
1080ab95 | 1762 | return ret; |
eb1d1641 HX |
1763 | } |
1764 | ||
cc0fdd80 | 1765 | static void br_multicast_query_expired(struct net_bridge *br, |
2cd41431 LL |
1766 | struct bridge_mcast_own_query *query, |
1767 | struct bridge_mcast_querier *querier) | |
cc0fdd80 LL |
1768 | { |
1769 | spin_lock(&br->multicast_lock); | |
1770 | if (query->startup_sent < br->multicast_startup_query_count) | |
1771 | query->startup_sent++; | |
1772 | ||
71d9f614 | 1773 | RCU_INIT_POINTER(querier->port, NULL); |
cc0fdd80 LL |
1774 | br_multicast_send_query(br, NULL, query); |
1775 | spin_unlock(&br->multicast_lock); | |
1776 | } | |
1777 | ||
1778 | static void br_ip4_multicast_query_expired(unsigned long data) | |
eb1d1641 HX |
1779 | { |
1780 | struct net_bridge *br = (void *)data; | |
1781 | ||
2cd41431 | 1782 | br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier); |
cc0fdd80 | 1783 | } |
eb1d1641 | 1784 | |
cc0fdd80 LL |
1785 | #if IS_ENABLED(CONFIG_IPV6) |
1786 | static void br_ip6_multicast_query_expired(unsigned long data) | |
1787 | { | |
1788 | struct net_bridge *br = (void *)data; | |
eb1d1641 | 1789 | |
2cd41431 | 1790 | br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier); |
eb1d1641 | 1791 | } |
cc0fdd80 | 1792 | #endif |
eb1d1641 HX |
1793 | |
1794 | void br_multicast_init(struct net_bridge *br) | |
1795 | { | |
1796 | br->hash_elasticity = 4; | |
1797 | br->hash_max = 512; | |
1798 | ||
7f0aec7a | 1799 | br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
c5c23260 | 1800 | br->multicast_querier = 0; |
1c8ad5bf | 1801 | br->multicast_query_use_ifaddr = 0; |
eb1d1641 HX |
1802 | br->multicast_last_member_count = 2; |
1803 | br->multicast_startup_query_count = 2; | |
1804 | ||
1805 | br->multicast_last_member_interval = HZ; | |
1806 | br->multicast_query_response_interval = 10 * HZ; | |
1807 | br->multicast_startup_query_interval = 125 * HZ / 4; | |
1808 | br->multicast_query_interval = 125 * HZ; | |
1809 | br->multicast_querier_interval = 255 * HZ; | |
1810 | br->multicast_membership_interval = 260 * HZ; | |
1811 | ||
90010b36 | 1812 | br->ip4_other_query.delay_time = 0; |
2cd41431 | 1813 | br->ip4_querier.port = NULL; |
cc0fdd80 | 1814 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1815 | br->ip6_other_query.delay_time = 0; |
2cd41431 | 1816 | br->ip6_querier.port = NULL; |
cc0fdd80 | 1817 | #endif |
0888d5f3 | 1818 | br->has_ipv6_addr = 1; |
b00589af | 1819 | |
eb1d1641 HX |
1820 | spin_lock_init(&br->multicast_lock); |
1821 | setup_timer(&br->multicast_router_timer, | |
1822 | br_multicast_local_router_expired, 0); | |
90010b36 LL |
1823 | setup_timer(&br->ip4_other_query.timer, |
1824 | br_ip4_multicast_querier_expired, (unsigned long)br); | |
1825 | setup_timer(&br->ip4_own_query.timer, br_ip4_multicast_query_expired, | |
eb1d1641 | 1826 | (unsigned long)br); |
cc0fdd80 | 1827 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 LL |
1828 | setup_timer(&br->ip6_other_query.timer, |
1829 | br_ip6_multicast_querier_expired, (unsigned long)br); | |
1830 | setup_timer(&br->ip6_own_query.timer, br_ip6_multicast_query_expired, | |
cc0fdd80 LL |
1831 | (unsigned long)br); |
1832 | #endif | |
eb1d1641 HX |
1833 | } |
1834 | ||
cc0fdd80 | 1835 | static void __br_multicast_open(struct net_bridge *br, |
90010b36 | 1836 | struct bridge_mcast_own_query *query) |
eb1d1641 | 1837 | { |
cc0fdd80 | 1838 | query->startup_sent = 0; |
eb1d1641 HX |
1839 | |
1840 | if (br->multicast_disabled) | |
1841 | return; | |
1842 | ||
cc0fdd80 LL |
1843 | mod_timer(&query->timer, jiffies); |
1844 | } | |
1845 | ||
1846 | void br_multicast_open(struct net_bridge *br) | |
1847 | { | |
90010b36 | 1848 | __br_multicast_open(br, &br->ip4_own_query); |
cc0fdd80 | 1849 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1850 | __br_multicast_open(br, &br->ip6_own_query); |
cc0fdd80 | 1851 | #endif |
eb1d1641 HX |
1852 | } |
1853 | ||
1854 | void br_multicast_stop(struct net_bridge *br) | |
1855 | { | |
eb1d1641 | 1856 | del_timer_sync(&br->multicast_router_timer); |
90010b36 LL |
1857 | del_timer_sync(&br->ip4_other_query.timer); |
1858 | del_timer_sync(&br->ip4_own_query.timer); | |
cc0fdd80 | 1859 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 LL |
1860 | del_timer_sync(&br->ip6_other_query.timer); |
1861 | del_timer_sync(&br->ip6_own_query.timer); | |
cc0fdd80 | 1862 | #endif |
e10177ab SA |
1863 | } |
1864 | ||
1865 | void br_multicast_dev_del(struct net_bridge *br) | |
1866 | { | |
1867 | struct net_bridge_mdb_htable *mdb; | |
1868 | struct net_bridge_mdb_entry *mp; | |
1869 | struct hlist_node *n; | |
1870 | u32 ver; | |
1871 | int i; | |
eb1d1641 HX |
1872 | |
1873 | spin_lock_bh(&br->multicast_lock); | |
e8051688 | 1874 | mdb = mlock_dereference(br->mdb, br); |
eb1d1641 HX |
1875 | if (!mdb) |
1876 | goto out; | |
1877 | ||
1878 | br->mdb = NULL; | |
1879 | ||
1880 | ver = mdb->ver; | |
1881 | for (i = 0; i < mdb->max; i++) { | |
b67bfe0d | 1882 | hlist_for_each_entry_safe(mp, n, &mdb->mhash[i], |
eb1d1641 HX |
1883 | hlist[ver]) { |
1884 | del_timer(&mp->timer); | |
eb1d1641 HX |
1885 | call_rcu_bh(&mp->rcu, br_multicast_free_group); |
1886 | } | |
1887 | } | |
1888 | ||
1889 | if (mdb->old) { | |
1890 | spin_unlock_bh(&br->multicast_lock); | |
10cc2b50 | 1891 | rcu_barrier_bh(); |
eb1d1641 HX |
1892 | spin_lock_bh(&br->multicast_lock); |
1893 | WARN_ON(mdb->old); | |
1894 | } | |
1895 | ||
1896 | mdb->old = mdb; | |
1897 | call_rcu_bh(&mdb->rcu, br_mdb_free); | |
1898 | ||
1899 | out: | |
1900 | spin_unlock_bh(&br->multicast_lock); | |
1080ab95 NA |
1901 | |
1902 | free_percpu(br->mcast_stats); | |
eb1d1641 | 1903 | } |
0909e117 HX |
1904 | |
1905 | int br_multicast_set_router(struct net_bridge *br, unsigned long val) | |
1906 | { | |
6ae4ae8e | 1907 | int err = -EINVAL; |
0909e117 HX |
1908 | |
1909 | spin_lock_bh(&br->multicast_lock); | |
0909e117 HX |
1910 | |
1911 | switch (val) { | |
7f0aec7a NA |
1912 | case MDB_RTR_TYPE_DISABLED: |
1913 | case MDB_RTR_TYPE_PERM: | |
0909e117 HX |
1914 | del_timer(&br->multicast_router_timer); |
1915 | /* fall through */ | |
7f0aec7a | 1916 | case MDB_RTR_TYPE_TEMP_QUERY: |
0909e117 HX |
1917 | br->multicast_router = val; |
1918 | err = 0; | |
1919 | break; | |
0909e117 HX |
1920 | } |
1921 | ||
0909e117 HX |
1922 | spin_unlock_bh(&br->multicast_lock); |
1923 | ||
1924 | return err; | |
1925 | } | |
1926 | ||
7f0aec7a NA |
1927 | static void __del_port_router(struct net_bridge_port *p) |
1928 | { | |
1929 | if (hlist_unhashed(&p->rlist)) | |
1930 | return; | |
1931 | hlist_del_init_rcu(&p->rlist); | |
1932 | br_rtr_notify(p->br->dev, p, RTM_DELMDB); | |
1933 | } | |
1934 | ||
0909e117 HX |
1935 | int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val) |
1936 | { | |
1937 | struct net_bridge *br = p->br; | |
a55d8246 | 1938 | unsigned long now = jiffies; |
6ae4ae8e | 1939 | int err = -EINVAL; |
0909e117 HX |
1940 | |
1941 | spin_lock(&br->multicast_lock); | |
4950cfd1 | 1942 | if (p->multicast_router == val) { |
a55d8246 NA |
1943 | /* Refresh the temp router port timer */ |
1944 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
1945 | mod_timer(&p->multicast_router_timer, | |
1946 | now + br->multicast_querier_interval); | |
4950cfd1 NA |
1947 | err = 0; |
1948 | goto unlock; | |
1949 | } | |
0909e117 | 1950 | switch (val) { |
7f0aec7a NA |
1951 | case MDB_RTR_TYPE_DISABLED: |
1952 | p->multicast_router = MDB_RTR_TYPE_DISABLED; | |
1953 | __del_port_router(p); | |
1954 | del_timer(&p->multicast_router_timer); | |
1955 | break; | |
1956 | case MDB_RTR_TYPE_TEMP_QUERY: | |
1957 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
1958 | __del_port_router(p); | |
1959 | break; | |
1960 | case MDB_RTR_TYPE_PERM: | |
1961 | p->multicast_router = MDB_RTR_TYPE_PERM; | |
0909e117 | 1962 | del_timer(&p->multicast_router_timer); |
0909e117 HX |
1963 | br_multicast_add_router(br, p); |
1964 | break; | |
a55d8246 NA |
1965 | case MDB_RTR_TYPE_TEMP: |
1966 | p->multicast_router = MDB_RTR_TYPE_TEMP; | |
1967 | br_multicast_mark_router(br, p); | |
1968 | break; | |
7f0aec7a NA |
1969 | default: |
1970 | goto unlock; | |
0909e117 | 1971 | } |
7f0aec7a NA |
1972 | err = 0; |
1973 | unlock: | |
0909e117 HX |
1974 | spin_unlock(&br->multicast_lock); |
1975 | ||
1976 | return err; | |
1977 | } | |
561f1103 | 1978 | |
cc0fdd80 | 1979 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 1980 | struct bridge_mcast_own_query *query) |
561f1103 HX |
1981 | { |
1982 | struct net_bridge_port *port; | |
74857216 | 1983 | |
cc0fdd80 | 1984 | __br_multicast_open(br, query); |
74857216 HX |
1985 | |
1986 | list_for_each_entry(port, &br->port_list, list) { | |
1987 | if (port->state == BR_STATE_DISABLED || | |
1988 | port->state == BR_STATE_BLOCKING) | |
1989 | continue; | |
1990 | ||
90010b36 LL |
1991 | if (query == &br->ip4_own_query) |
1992 | br_multicast_enable(&port->ip4_own_query); | |
cc0fdd80 LL |
1993 | #if IS_ENABLED(CONFIG_IPV6) |
1994 | else | |
90010b36 | 1995 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 1996 | #endif |
74857216 HX |
1997 | } |
1998 | } | |
1999 | ||
2000 | int br_multicast_toggle(struct net_bridge *br, unsigned long val) | |
2001 | { | |
e8051688 | 2002 | struct net_bridge_mdb_htable *mdb; |
7cb3f921 NA |
2003 | struct net_bridge_port *port; |
2004 | int err = 0; | |
561f1103 | 2005 | |
ef5e0d82 | 2006 | spin_lock_bh(&br->multicast_lock); |
561f1103 HX |
2007 | if (br->multicast_disabled == !val) |
2008 | goto unlock; | |
2009 | ||
2010 | br->multicast_disabled = !val; | |
2011 | if (br->multicast_disabled) | |
2012 | goto unlock; | |
2013 | ||
3a7fda06 HX |
2014 | if (!netif_running(br->dev)) |
2015 | goto unlock; | |
2016 | ||
e8051688 ED |
2017 | mdb = mlock_dereference(br->mdb, br); |
2018 | if (mdb) { | |
2019 | if (mdb->old) { | |
561f1103 HX |
2020 | err = -EEXIST; |
2021 | rollback: | |
2022 | br->multicast_disabled = !!val; | |
2023 | goto unlock; | |
2024 | } | |
2025 | ||
e8051688 | 2026 | err = br_mdb_rehash(&br->mdb, mdb->max, |
561f1103 HX |
2027 | br->hash_elasticity); |
2028 | if (err) | |
2029 | goto rollback; | |
2030 | } | |
2031 | ||
7cb3f921 NA |
2032 | br_multicast_open(br); |
2033 | list_for_each_entry(port, &br->port_list, list) | |
2034 | __br_multicast_enable_port(port); | |
561f1103 HX |
2035 | |
2036 | unlock: | |
ef5e0d82 | 2037 | spin_unlock_bh(&br->multicast_lock); |
561f1103 HX |
2038 | |
2039 | return err; | |
2040 | } | |
b195167f | 2041 | |
c5c23260 HX |
2042 | int br_multicast_set_querier(struct net_bridge *br, unsigned long val) |
2043 | { | |
b00589af LL |
2044 | unsigned long max_delay; |
2045 | ||
c5c23260 HX |
2046 | val = !!val; |
2047 | ||
2048 | spin_lock_bh(&br->multicast_lock); | |
2049 | if (br->multicast_querier == val) | |
2050 | goto unlock; | |
2051 | ||
2052 | br->multicast_querier = val; | |
b00589af LL |
2053 | if (!val) |
2054 | goto unlock; | |
2055 | ||
2056 | max_delay = br->multicast_query_response_interval; | |
b00589af | 2057 | |
90010b36 LL |
2058 | if (!timer_pending(&br->ip4_other_query.timer)) |
2059 | br->ip4_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2060 | |
90010b36 | 2061 | br_multicast_start_querier(br, &br->ip4_own_query); |
cc0fdd80 LL |
2062 | |
2063 | #if IS_ENABLED(CONFIG_IPV6) | |
90010b36 LL |
2064 | if (!timer_pending(&br->ip6_other_query.timer)) |
2065 | br->ip6_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2066 | |
90010b36 | 2067 | br_multicast_start_querier(br, &br->ip6_own_query); |
cc0fdd80 | 2068 | #endif |
c5c23260 HX |
2069 | |
2070 | unlock: | |
2071 | spin_unlock_bh(&br->multicast_lock); | |
2072 | ||
2073 | return 0; | |
2074 | } | |
2075 | ||
b195167f HX |
2076 | int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val) |
2077 | { | |
6ae4ae8e | 2078 | int err = -EINVAL; |
b195167f | 2079 | u32 old; |
e8051688 | 2080 | struct net_bridge_mdb_htable *mdb; |
b195167f | 2081 | |
fe0d692b | 2082 | spin_lock_bh(&br->multicast_lock); |
b195167f HX |
2083 | if (!is_power_of_2(val)) |
2084 | goto unlock; | |
e8051688 ED |
2085 | |
2086 | mdb = mlock_dereference(br->mdb, br); | |
2087 | if (mdb && val < mdb->size) | |
b195167f HX |
2088 | goto unlock; |
2089 | ||
2090 | err = 0; | |
2091 | ||
2092 | old = br->hash_max; | |
2093 | br->hash_max = val; | |
2094 | ||
e8051688 ED |
2095 | if (mdb) { |
2096 | if (mdb->old) { | |
b195167f HX |
2097 | err = -EEXIST; |
2098 | rollback: | |
2099 | br->hash_max = old; | |
2100 | goto unlock; | |
2101 | } | |
2102 | ||
2103 | err = br_mdb_rehash(&br->mdb, br->hash_max, | |
2104 | br->hash_elasticity); | |
2105 | if (err) | |
2106 | goto rollback; | |
2107 | } | |
2108 | ||
2109 | unlock: | |
fe0d692b | 2110 | spin_unlock_bh(&br->multicast_lock); |
b195167f HX |
2111 | |
2112 | return err; | |
2113 | } | |
07f8ac4a LL |
2114 | |
2115 | /** | |
2116 | * br_multicast_list_adjacent - Returns snooped multicast addresses | |
2117 | * @dev: The bridge port adjacent to which to retrieve addresses | |
2118 | * @br_ip_list: The list to store found, snooped multicast IP addresses in | |
2119 | * | |
2120 | * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast | |
2121 | * snooping feature on all bridge ports of dev's bridge device, excluding | |
2122 | * the addresses from dev itself. | |
2123 | * | |
2124 | * Returns the number of items added to br_ip_list. | |
2125 | * | |
2126 | * Notes: | |
2127 | * - br_ip_list needs to be initialized by caller | |
2128 | * - br_ip_list might contain duplicates in the end | |
2129 | * (needs to be taken care of by caller) | |
2130 | * - br_ip_list needs to be freed by caller | |
2131 | */ | |
2132 | int br_multicast_list_adjacent(struct net_device *dev, | |
2133 | struct list_head *br_ip_list) | |
2134 | { | |
2135 | struct net_bridge *br; | |
2136 | struct net_bridge_port *port; | |
2137 | struct net_bridge_port_group *group; | |
2138 | struct br_ip_list *entry; | |
2139 | int count = 0; | |
2140 | ||
2141 | rcu_read_lock(); | |
2142 | if (!br_ip_list || !br_port_exists(dev)) | |
2143 | goto unlock; | |
2144 | ||
2145 | port = br_port_get_rcu(dev); | |
2146 | if (!port || !port->br) | |
2147 | goto unlock; | |
2148 | ||
2149 | br = port->br; | |
2150 | ||
2151 | list_for_each_entry_rcu(port, &br->port_list, list) { | |
2152 | if (!port->dev || port->dev == dev) | |
2153 | continue; | |
2154 | ||
2155 | hlist_for_each_entry_rcu(group, &port->mglist, mglist) { | |
2156 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); | |
2157 | if (!entry) | |
2158 | goto unlock; | |
2159 | ||
2160 | entry->addr = group->addr; | |
2161 | list_add(&entry->list, br_ip_list); | |
2162 | count++; | |
2163 | } | |
2164 | } | |
2165 | ||
2166 | unlock: | |
2167 | rcu_read_unlock(); | |
2168 | return count; | |
2169 | } | |
2170 | EXPORT_SYMBOL_GPL(br_multicast_list_adjacent); | |
2cd41431 | 2171 | |
c34963e2 LL |
2172 | /** |
2173 | * br_multicast_has_querier_anywhere - Checks for a querier on a bridge | |
2174 | * @dev: The bridge port providing the bridge on which to check for a querier | |
2175 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2176 | * | |
2177 | * Checks whether the given interface has a bridge on top and if so returns | |
2178 | * true if a valid querier exists anywhere on the bridged link layer. | |
2179 | * Otherwise returns false. | |
2180 | */ | |
2181 | bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto) | |
2182 | { | |
2183 | struct net_bridge *br; | |
2184 | struct net_bridge_port *port; | |
2185 | struct ethhdr eth; | |
2186 | bool ret = false; | |
2187 | ||
2188 | rcu_read_lock(); | |
2189 | if (!br_port_exists(dev)) | |
2190 | goto unlock; | |
2191 | ||
2192 | port = br_port_get_rcu(dev); | |
2193 | if (!port || !port->br) | |
2194 | goto unlock; | |
2195 | ||
2196 | br = port->br; | |
2197 | ||
2198 | memset(ð, 0, sizeof(eth)); | |
2199 | eth.h_proto = htons(proto); | |
2200 | ||
2201 | ret = br_multicast_querier_exists(br, ð); | |
2202 | ||
2203 | unlock: | |
2204 | rcu_read_unlock(); | |
2205 | return ret; | |
2206 | } | |
2207 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere); | |
2208 | ||
2cd41431 LL |
2209 | /** |
2210 | * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port | |
2211 | * @dev: The bridge port adjacent to which to check for a querier | |
2212 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2213 | * | |
2214 | * Checks whether the given interface has a bridge on top and if so returns | |
2215 | * true if a selected querier is behind one of the other ports of this | |
2216 | * bridge. Otherwise returns false. | |
2217 | */ | |
2218 | bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto) | |
2219 | { | |
2220 | struct net_bridge *br; | |
2221 | struct net_bridge_port *port; | |
2222 | bool ret = false; | |
2223 | ||
2224 | rcu_read_lock(); | |
2225 | if (!br_port_exists(dev)) | |
2226 | goto unlock; | |
2227 | ||
2228 | port = br_port_get_rcu(dev); | |
2229 | if (!port || !port->br) | |
2230 | goto unlock; | |
2231 | ||
2232 | br = port->br; | |
2233 | ||
2234 | switch (proto) { | |
2235 | case ETH_P_IP: | |
2236 | if (!timer_pending(&br->ip4_other_query.timer) || | |
2237 | rcu_dereference(br->ip4_querier.port) == port) | |
2238 | goto unlock; | |
2239 | break; | |
3993c4e1 | 2240 | #if IS_ENABLED(CONFIG_IPV6) |
2cd41431 LL |
2241 | case ETH_P_IPV6: |
2242 | if (!timer_pending(&br->ip6_other_query.timer) || | |
2243 | rcu_dereference(br->ip6_querier.port) == port) | |
2244 | goto unlock; | |
2245 | break; | |
3993c4e1 | 2246 | #endif |
2cd41431 LL |
2247 | default: |
2248 | goto unlock; | |
2249 | } | |
2250 | ||
2251 | ret = true; | |
2252 | unlock: | |
2253 | rcu_read_unlock(); | |
2254 | return ret; | |
2255 | } | |
2256 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent); | |
1080ab95 NA |
2257 | |
2258 | static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, | |
a65056ec | 2259 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2260 | { |
2261 | struct bridge_mcast_stats *pstats = this_cpu_ptr(stats); | |
a65056ec NA |
2262 | __be16 proto = skb->protocol; |
2263 | unsigned int t_len; | |
1080ab95 NA |
2264 | |
2265 | u64_stats_update_begin(&pstats->syncp); | |
2266 | switch (proto) { | |
2267 | case htons(ETH_P_IP): | |
a65056ec | 2268 | t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb); |
1080ab95 NA |
2269 | switch (type) { |
2270 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
2271 | pstats->mstats.igmp_v1reports[dir]++; | |
2272 | break; | |
2273 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
2274 | pstats->mstats.igmp_v2reports[dir]++; | |
2275 | break; | |
2276 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
2277 | pstats->mstats.igmp_v3reports[dir]++; | |
2278 | break; | |
2279 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
a65056ec NA |
2280 | if (t_len != sizeof(struct igmphdr)) { |
2281 | pstats->mstats.igmp_v3queries[dir]++; | |
2282 | } else { | |
2283 | unsigned int offset = skb_transport_offset(skb); | |
2284 | struct igmphdr *ih, _ihdr; | |
2285 | ||
2286 | ih = skb_header_pointer(skb, offset, | |
2287 | sizeof(_ihdr), &_ihdr); | |
2288 | if (!ih) | |
2289 | break; | |
2290 | if (!ih->code) | |
2291 | pstats->mstats.igmp_v1queries[dir]++; | |
2292 | else | |
2293 | pstats->mstats.igmp_v2queries[dir]++; | |
2294 | } | |
1080ab95 NA |
2295 | break; |
2296 | case IGMP_HOST_LEAVE_MESSAGE: | |
2297 | pstats->mstats.igmp_leaves[dir]++; | |
2298 | break; | |
2299 | } | |
2300 | break; | |
2301 | #if IS_ENABLED(CONFIG_IPV6) | |
2302 | case htons(ETH_P_IPV6): | |
a65056ec NA |
2303 | t_len = ntohs(ipv6_hdr(skb)->payload_len) + |
2304 | sizeof(struct ipv6hdr); | |
2305 | t_len -= skb_network_header_len(skb); | |
1080ab95 NA |
2306 | switch (type) { |
2307 | case ICMPV6_MGM_REPORT: | |
2308 | pstats->mstats.mld_v1reports[dir]++; | |
2309 | break; | |
2310 | case ICMPV6_MLD2_REPORT: | |
2311 | pstats->mstats.mld_v2reports[dir]++; | |
2312 | break; | |
2313 | case ICMPV6_MGM_QUERY: | |
a65056ec NA |
2314 | if (t_len != sizeof(struct mld_msg)) |
2315 | pstats->mstats.mld_v2queries[dir]++; | |
2316 | else | |
2317 | pstats->mstats.mld_v1queries[dir]++; | |
1080ab95 NA |
2318 | break; |
2319 | case ICMPV6_MGM_REDUCTION: | |
2320 | pstats->mstats.mld_leaves[dir]++; | |
2321 | break; | |
2322 | } | |
2323 | break; | |
2324 | #endif /* CONFIG_IPV6 */ | |
2325 | } | |
2326 | u64_stats_update_end(&pstats->syncp); | |
2327 | } | |
2328 | ||
2329 | void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, | |
a65056ec | 2330 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2331 | { |
2332 | struct bridge_mcast_stats __percpu *stats; | |
2333 | ||
2334 | /* if multicast_disabled is true then igmp type can't be set */ | |
2335 | if (!type || !br->multicast_stats_enabled) | |
2336 | return; | |
2337 | ||
2338 | if (p) | |
2339 | stats = p->mcast_stats; | |
2340 | else | |
2341 | stats = br->mcast_stats; | |
2342 | if (WARN_ON(!stats)) | |
2343 | return; | |
2344 | ||
a65056ec | 2345 | br_mcast_stats_add(stats, skb, type, dir); |
1080ab95 NA |
2346 | } |
2347 | ||
2348 | int br_multicast_init_stats(struct net_bridge *br) | |
2349 | { | |
2350 | br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); | |
2351 | if (!br->mcast_stats) | |
2352 | return -ENOMEM; | |
2353 | ||
2354 | return 0; | |
2355 | } | |
2356 | ||
2357 | static void mcast_stats_add_dir(u64 *dst, u64 *src) | |
2358 | { | |
2359 | dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX]; | |
2360 | dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX]; | |
2361 | } | |
2362 | ||
2363 | void br_multicast_get_stats(const struct net_bridge *br, | |
2364 | const struct net_bridge_port *p, | |
2365 | struct br_mcast_stats *dest) | |
2366 | { | |
2367 | struct bridge_mcast_stats __percpu *stats; | |
2368 | struct br_mcast_stats tdst; | |
2369 | int i; | |
2370 | ||
2371 | memset(dest, 0, sizeof(*dest)); | |
2372 | if (p) | |
2373 | stats = p->mcast_stats; | |
2374 | else | |
2375 | stats = br->mcast_stats; | |
2376 | if (WARN_ON(!stats)) | |
2377 | return; | |
2378 | ||
2379 | memset(&tdst, 0, sizeof(tdst)); | |
2380 | for_each_possible_cpu(i) { | |
2381 | struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i); | |
2382 | struct br_mcast_stats temp; | |
2383 | unsigned int start; | |
2384 | ||
2385 | do { | |
2386 | start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); | |
2387 | memcpy(&temp, &cpu_stats->mstats, sizeof(temp)); | |
2388 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); | |
2389 | ||
a65056ec NA |
2390 | mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries); |
2391 | mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries); | |
2392 | mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries); | |
1080ab95 NA |
2393 | mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves); |
2394 | mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports); | |
2395 | mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports); | |
2396 | mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports); | |
2397 | tdst.igmp_parse_errors += temp.igmp_parse_errors; | |
2398 | ||
a65056ec NA |
2399 | mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries); |
2400 | mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries); | |
1080ab95 NA |
2401 | mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves); |
2402 | mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports); | |
2403 | mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports); | |
2404 | tdst.mld_parse_errors += temp.mld_parse_errors; | |
2405 | } | |
2406 | memcpy(dest, &tdst, sizeof(*dest)); | |
2407 | } |