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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> | |
14 | #include <linux/if_ether.h> | |
15 | #include <linux/igmp.h> | |
16 | #include <linux/jhash.h> | |
17 | #include <linux/kernel.h> | |
b195167f | 18 | #include <linux/log2.h> |
eb1d1641 HX |
19 | #include <linux/netdevice.h> |
20 | #include <linux/netfilter_bridge.h> | |
21 | #include <linux/random.h> | |
22 | #include <linux/rculist.h> | |
23 | #include <linux/skbuff.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/timer.h> | |
26 | #include <net/ip.h> | |
08b202b6 YH |
27 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
28 | #include <net/ipv6.h> | |
29 | #include <net/mld.h> | |
30 | #include <net/addrconf.h> | |
d4c4f07d | 31 | #include <net/ip6_checksum.h> |
08b202b6 | 32 | #endif |
eb1d1641 HX |
33 | |
34 | #include "br_private.h" | |
35 | ||
e8051688 ED |
36 | #define mlock_dereference(X, br) \ |
37 | rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) | |
38 | ||
08b202b6 | 39 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
e4de9f9e | 40 | static inline int ipv6_is_transient_multicast(const struct in6_addr *addr) |
eb1d1641 | 41 | { |
e4de9f9e | 42 | if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr)) |
08b202b6 YH |
43 | return 1; |
44 | return 0; | |
45 | } | |
46 | #endif | |
47 | ||
8ef2a9a5 YH |
48 | static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b) |
49 | { | |
50 | if (a->proto != b->proto) | |
51 | return 0; | |
52 | switch (a->proto) { | |
53 | case htons(ETH_P_IP): | |
54 | return a->u.ip4 == b->u.ip4; | |
08b202b6 YH |
55 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
56 | case htons(ETH_P_IPV6): | |
57 | return ipv6_addr_equal(&a->u.ip6, &b->u.ip6); | |
58 | #endif | |
8ef2a9a5 YH |
59 | } |
60 | return 0; | |
61 | } | |
62 | ||
63 | static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip) | |
eb1d1641 | 64 | { |
0eae88f3 | 65 | return jhash_1word(mdb->secret, (__force u32)ip) & (mdb->max - 1); |
eb1d1641 HX |
66 | } |
67 | ||
08b202b6 YH |
68 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
69 | static inline int __br_ip6_hash(struct net_bridge_mdb_htable *mdb, | |
70 | const struct in6_addr *ip) | |
71 | { | |
72 | return jhash2((__force u32 *)ip->s6_addr32, 4, mdb->secret) & (mdb->max - 1); | |
73 | } | |
74 | #endif | |
75 | ||
8ef2a9a5 YH |
76 | static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb, |
77 | struct br_ip *ip) | |
78 | { | |
79 | switch (ip->proto) { | |
80 | case htons(ETH_P_IP): | |
81 | return __br_ip4_hash(mdb, ip->u.ip4); | |
08b202b6 YH |
82 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
83 | case htons(ETH_P_IPV6): | |
84 | return __br_ip6_hash(mdb, &ip->u.ip6); | |
85 | #endif | |
8ef2a9a5 YH |
86 | } |
87 | return 0; | |
eb1d1641 HX |
88 | } |
89 | ||
90 | static struct net_bridge_mdb_entry *__br_mdb_ip_get( | |
8ef2a9a5 | 91 | struct net_bridge_mdb_htable *mdb, struct br_ip *dst, int hash) |
eb1d1641 HX |
92 | { |
93 | struct net_bridge_mdb_entry *mp; | |
94 | struct hlist_node *p; | |
95 | ||
49f5fcfd | 96 | hlist_for_each_entry_rcu(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) { |
8ef2a9a5 | 97 | if (br_ip_equal(&mp->addr, dst)) |
eb1d1641 HX |
98 | return mp; |
99 | } | |
100 | ||
101 | return NULL; | |
102 | } | |
103 | ||
7f285fa7 HX |
104 | static struct net_bridge_mdb_entry *br_mdb_ip_get( |
105 | struct net_bridge_mdb_htable *mdb, struct br_ip *dst) | |
106 | { | |
107 | if (!mdb) | |
108 | return NULL; | |
109 | ||
110 | return __br_mdb_ip_get(mdb, dst, br_ip_hash(mdb, dst)); | |
111 | } | |
112 | ||
8ef2a9a5 | 113 | static struct net_bridge_mdb_entry *br_mdb_ip4_get( |
eb1d1641 HX |
114 | struct net_bridge_mdb_htable *mdb, __be32 dst) |
115 | { | |
8ef2a9a5 YH |
116 | struct br_ip br_dst; |
117 | ||
118 | br_dst.u.ip4 = dst; | |
119 | br_dst.proto = htons(ETH_P_IP); | |
0821ec55 | 120 | |
7f285fa7 | 121 | return br_mdb_ip_get(mdb, &br_dst); |
8ef2a9a5 YH |
122 | } |
123 | ||
08b202b6 YH |
124 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
125 | static struct net_bridge_mdb_entry *br_mdb_ip6_get( | |
126 | struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst) | |
127 | { | |
128 | struct br_ip br_dst; | |
0821ec55 | 129 | |
08b202b6 YH |
130 | ipv6_addr_copy(&br_dst.u.ip6, dst); |
131 | br_dst.proto = htons(ETH_P_IPV6); | |
132 | ||
7f285fa7 | 133 | return br_mdb_ip_get(mdb, &br_dst); |
08b202b6 YH |
134 | } |
135 | #endif | |
136 | ||
eb1d1641 HX |
137 | struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, |
138 | struct sk_buff *skb) | |
139 | { | |
e8051688 | 140 | struct net_bridge_mdb_htable *mdb = rcu_dereference(br->mdb); |
8ef2a9a5 YH |
141 | struct br_ip ip; |
142 | ||
7f285fa7 | 143 | if (br->multicast_disabled) |
eb1d1641 HX |
144 | return NULL; |
145 | ||
8ef2a9a5 | 146 | if (BR_INPUT_SKB_CB(skb)->igmp) |
eb1d1641 HX |
147 | return NULL; |
148 | ||
8ef2a9a5 YH |
149 | ip.proto = skb->protocol; |
150 | ||
eb1d1641 HX |
151 | switch (skb->protocol) { |
152 | case htons(ETH_P_IP): | |
8ef2a9a5 YH |
153 | ip.u.ip4 = ip_hdr(skb)->daddr; |
154 | break; | |
08b202b6 YH |
155 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
156 | case htons(ETH_P_IPV6): | |
157 | ipv6_addr_copy(&ip.u.ip6, &ipv6_hdr(skb)->daddr); | |
158 | break; | |
159 | #endif | |
8ef2a9a5 YH |
160 | default: |
161 | return NULL; | |
eb1d1641 HX |
162 | } |
163 | ||
8ef2a9a5 | 164 | return br_mdb_ip_get(mdb, &ip); |
eb1d1641 HX |
165 | } |
166 | ||
167 | static void br_mdb_free(struct rcu_head *head) | |
168 | { | |
169 | struct net_bridge_mdb_htable *mdb = | |
170 | container_of(head, struct net_bridge_mdb_htable, rcu); | |
171 | struct net_bridge_mdb_htable *old = mdb->old; | |
172 | ||
173 | mdb->old = NULL; | |
174 | kfree(old->mhash); | |
175 | kfree(old); | |
176 | } | |
177 | ||
178 | static int br_mdb_copy(struct net_bridge_mdb_htable *new, | |
179 | struct net_bridge_mdb_htable *old, | |
180 | int elasticity) | |
181 | { | |
182 | struct net_bridge_mdb_entry *mp; | |
183 | struct hlist_node *p; | |
184 | int maxlen; | |
185 | int len; | |
186 | int i; | |
187 | ||
188 | for (i = 0; i < old->max; i++) | |
189 | hlist_for_each_entry(mp, p, &old->mhash[i], hlist[old->ver]) | |
190 | hlist_add_head(&mp->hlist[new->ver], | |
8ef2a9a5 | 191 | &new->mhash[br_ip_hash(new, &mp->addr)]); |
eb1d1641 HX |
192 | |
193 | if (!elasticity) | |
194 | return 0; | |
195 | ||
196 | maxlen = 0; | |
197 | for (i = 0; i < new->max; i++) { | |
198 | len = 0; | |
199 | hlist_for_each_entry(mp, p, &new->mhash[i], hlist[new->ver]) | |
200 | len++; | |
201 | if (len > maxlen) | |
202 | maxlen = len; | |
203 | } | |
204 | ||
205 | return maxlen > elasticity ? -EINVAL : 0; | |
206 | } | |
207 | ||
208 | static void br_multicast_free_pg(struct rcu_head *head) | |
209 | { | |
210 | struct net_bridge_port_group *p = | |
211 | container_of(head, struct net_bridge_port_group, rcu); | |
212 | ||
213 | kfree(p); | |
214 | } | |
215 | ||
216 | static void br_multicast_free_group(struct rcu_head *head) | |
217 | { | |
218 | struct net_bridge_mdb_entry *mp = | |
219 | container_of(head, struct net_bridge_mdb_entry, rcu); | |
220 | ||
221 | kfree(mp); | |
222 | } | |
223 | ||
224 | static void br_multicast_group_expired(unsigned long data) | |
225 | { | |
226 | struct net_bridge_mdb_entry *mp = (void *)data; | |
227 | struct net_bridge *br = mp->br; | |
228 | struct net_bridge_mdb_htable *mdb; | |
229 | ||
230 | spin_lock(&br->multicast_lock); | |
231 | if (!netif_running(br->dev) || timer_pending(&mp->timer)) | |
232 | goto out; | |
233 | ||
8a870178 | 234 | mp->mglist = false; |
eb1d1641 HX |
235 | |
236 | if (mp->ports) | |
237 | goto out; | |
238 | ||
e8051688 ED |
239 | mdb = mlock_dereference(br->mdb, br); |
240 | ||
eb1d1641 HX |
241 | hlist_del_rcu(&mp->hlist[mdb->ver]); |
242 | mdb->size--; | |
243 | ||
244 | del_timer(&mp->query_timer); | |
245 | call_rcu_bh(&mp->rcu, br_multicast_free_group); | |
246 | ||
247 | out: | |
248 | spin_unlock(&br->multicast_lock); | |
249 | } | |
250 | ||
251 | static void br_multicast_del_pg(struct net_bridge *br, | |
252 | struct net_bridge_port_group *pg) | |
253 | { | |
e8051688 | 254 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 HX |
255 | struct net_bridge_mdb_entry *mp; |
256 | struct net_bridge_port_group *p; | |
e8051688 ED |
257 | struct net_bridge_port_group __rcu **pp; |
258 | ||
259 | mdb = mlock_dereference(br->mdb, br); | |
eb1d1641 | 260 | |
8ef2a9a5 | 261 | mp = br_mdb_ip_get(mdb, &pg->addr); |
eb1d1641 HX |
262 | if (WARN_ON(!mp)) |
263 | return; | |
264 | ||
e8051688 ED |
265 | for (pp = &mp->ports; |
266 | (p = mlock_dereference(*pp, br)) != NULL; | |
267 | pp = &p->next) { | |
eb1d1641 HX |
268 | if (p != pg) |
269 | continue; | |
270 | ||
83f6a740 | 271 | rcu_assign_pointer(*pp, p->next); |
eb1d1641 HX |
272 | hlist_del_init(&p->mglist); |
273 | del_timer(&p->timer); | |
274 | del_timer(&p->query_timer); | |
275 | call_rcu_bh(&p->rcu, br_multicast_free_pg); | |
276 | ||
8a870178 | 277 | if (!mp->ports && !mp->mglist && |
eb1d1641 HX |
278 | netif_running(br->dev)) |
279 | mod_timer(&mp->timer, jiffies); | |
280 | ||
281 | return; | |
282 | } | |
283 | ||
284 | WARN_ON(1); | |
285 | } | |
286 | ||
287 | static void br_multicast_port_group_expired(unsigned long data) | |
288 | { | |
289 | struct net_bridge_port_group *pg = (void *)data; | |
290 | struct net_bridge *br = pg->port->br; | |
291 | ||
292 | spin_lock(&br->multicast_lock); | |
293 | if (!netif_running(br->dev) || timer_pending(&pg->timer) || | |
294 | hlist_unhashed(&pg->mglist)) | |
295 | goto out; | |
296 | ||
297 | br_multicast_del_pg(br, pg); | |
298 | ||
299 | out: | |
300 | spin_unlock(&br->multicast_lock); | |
301 | } | |
302 | ||
e8051688 | 303 | static int br_mdb_rehash(struct net_bridge_mdb_htable __rcu **mdbp, int max, |
eb1d1641 HX |
304 | int elasticity) |
305 | { | |
e8051688 | 306 | struct net_bridge_mdb_htable *old = rcu_dereference_protected(*mdbp, 1); |
eb1d1641 HX |
307 | struct net_bridge_mdb_htable *mdb; |
308 | int err; | |
309 | ||
310 | mdb = kmalloc(sizeof(*mdb), GFP_ATOMIC); | |
311 | if (!mdb) | |
312 | return -ENOMEM; | |
313 | ||
314 | mdb->max = max; | |
315 | mdb->old = old; | |
316 | ||
317 | mdb->mhash = kzalloc(max * sizeof(*mdb->mhash), GFP_ATOMIC); | |
318 | if (!mdb->mhash) { | |
319 | kfree(mdb); | |
320 | return -ENOMEM; | |
321 | } | |
322 | ||
323 | mdb->size = old ? old->size : 0; | |
324 | mdb->ver = old ? old->ver ^ 1 : 0; | |
325 | ||
326 | if (!old || elasticity) | |
327 | get_random_bytes(&mdb->secret, sizeof(mdb->secret)); | |
328 | else | |
329 | mdb->secret = old->secret; | |
330 | ||
331 | if (!old) | |
332 | goto out; | |
333 | ||
334 | err = br_mdb_copy(mdb, old, elasticity); | |
335 | if (err) { | |
336 | kfree(mdb->mhash); | |
337 | kfree(mdb); | |
338 | return err; | |
339 | } | |
340 | ||
341 | call_rcu_bh(&mdb->rcu, br_mdb_free); | |
342 | ||
343 | out: | |
344 | rcu_assign_pointer(*mdbp, mdb); | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
8ef2a9a5 YH |
349 | static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br, |
350 | __be32 group) | |
eb1d1641 HX |
351 | { |
352 | struct sk_buff *skb; | |
353 | struct igmphdr *ih; | |
354 | struct ethhdr *eth; | |
355 | struct iphdr *iph; | |
356 | ||
357 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) + | |
358 | sizeof(*ih) + 4); | |
359 | if (!skb) | |
360 | goto out; | |
361 | ||
362 | skb->protocol = htons(ETH_P_IP); | |
363 | ||
364 | skb_reset_mac_header(skb); | |
365 | eth = eth_hdr(skb); | |
366 | ||
367 | memcpy(eth->h_source, br->dev->dev_addr, 6); | |
368 | eth->h_dest[0] = 1; | |
369 | eth->h_dest[1] = 0; | |
370 | eth->h_dest[2] = 0x5e; | |
371 | eth->h_dest[3] = 0; | |
372 | eth->h_dest[4] = 0; | |
373 | eth->h_dest[5] = 1; | |
374 | eth->h_proto = htons(ETH_P_IP); | |
375 | skb_put(skb, sizeof(*eth)); | |
376 | ||
377 | skb_set_network_header(skb, skb->len); | |
378 | iph = ip_hdr(skb); | |
379 | ||
380 | iph->version = 4; | |
381 | iph->ihl = 6; | |
382 | iph->tos = 0xc0; | |
383 | iph->tot_len = htons(sizeof(*iph) + sizeof(*ih) + 4); | |
384 | iph->id = 0; | |
385 | iph->frag_off = htons(IP_DF); | |
386 | iph->ttl = 1; | |
387 | iph->protocol = IPPROTO_IGMP; | |
388 | iph->saddr = 0; | |
389 | iph->daddr = htonl(INADDR_ALLHOSTS_GROUP); | |
390 | ((u8 *)&iph[1])[0] = IPOPT_RA; | |
391 | ((u8 *)&iph[1])[1] = 4; | |
392 | ((u8 *)&iph[1])[2] = 0; | |
393 | ((u8 *)&iph[1])[3] = 0; | |
394 | ip_send_check(iph); | |
395 | skb_put(skb, 24); | |
396 | ||
397 | skb_set_transport_header(skb, skb->len); | |
398 | ih = igmp_hdr(skb); | |
399 | ih->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
400 | ih->code = (group ? br->multicast_last_member_interval : | |
401 | br->multicast_query_response_interval) / | |
402 | (HZ / IGMP_TIMER_SCALE); | |
403 | ih->group = group; | |
404 | ih->csum = 0; | |
405 | ih->csum = ip_compute_csum((void *)ih, sizeof(struct igmphdr)); | |
406 | skb_put(skb, sizeof(*ih)); | |
407 | ||
408 | __skb_pull(skb, sizeof(*eth)); | |
409 | ||
410 | out: | |
411 | return skb; | |
412 | } | |
413 | ||
08b202b6 YH |
414 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
415 | static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, | |
b71d1d42 | 416 | const struct in6_addr *group) |
08b202b6 YH |
417 | { |
418 | struct sk_buff *skb; | |
419 | struct ipv6hdr *ip6h; | |
420 | struct mld_msg *mldq; | |
421 | struct ethhdr *eth; | |
422 | u8 *hopopt; | |
423 | unsigned long interval; | |
424 | ||
425 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) + | |
426 | 8 + sizeof(*mldq)); | |
427 | if (!skb) | |
428 | goto out; | |
429 | ||
430 | skb->protocol = htons(ETH_P_IPV6); | |
431 | ||
432 | /* Ethernet header */ | |
433 | skb_reset_mac_header(skb); | |
434 | eth = eth_hdr(skb); | |
435 | ||
436 | memcpy(eth->h_source, br->dev->dev_addr, 6); | |
08b202b6 YH |
437 | eth->h_proto = htons(ETH_P_IPV6); |
438 | skb_put(skb, sizeof(*eth)); | |
439 | ||
440 | /* IPv6 header + HbH option */ | |
441 | skb_set_network_header(skb, skb->len); | |
442 | ip6h = ipv6_hdr(skb); | |
443 | ||
444 | *(__force __be32 *)ip6h = htonl(0x60000000); | |
76d66158 | 445 | ip6h->payload_len = htons(8 + sizeof(*mldq)); |
08b202b6 YH |
446 | ip6h->nexthdr = IPPROTO_HOPOPTS; |
447 | ip6h->hop_limit = 1; | |
a7bff75b | 448 | ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1)); |
fe29ec41 LL |
449 | ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, |
450 | &ip6h->saddr); | |
36cff5a1 | 451 | ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); |
08b202b6 YH |
452 | |
453 | hopopt = (u8 *)(ip6h + 1); | |
454 | hopopt[0] = IPPROTO_ICMPV6; /* next hdr */ | |
455 | hopopt[1] = 0; /* length of HbH */ | |
456 | hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */ | |
457 | hopopt[3] = 2; /* Length of RA Option */ | |
458 | hopopt[4] = 0; /* Type = 0x0000 (MLD) */ | |
459 | hopopt[5] = 0; | |
460 | hopopt[6] = IPV6_TLV_PAD0; /* Pad0 */ | |
461 | hopopt[7] = IPV6_TLV_PAD0; /* Pad0 */ | |
462 | ||
463 | skb_put(skb, sizeof(*ip6h) + 8); | |
464 | ||
465 | /* ICMPv6 */ | |
466 | skb_set_transport_header(skb, skb->len); | |
467 | mldq = (struct mld_msg *) icmp6_hdr(skb); | |
468 | ||
469 | interval = ipv6_addr_any(group) ? br->multicast_last_member_interval : | |
470 | br->multicast_query_response_interval; | |
471 | ||
472 | mldq->mld_type = ICMPV6_MGM_QUERY; | |
473 | mldq->mld_code = 0; | |
474 | mldq->mld_cksum = 0; | |
475 | mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval)); | |
476 | mldq->mld_reserved = 0; | |
477 | ipv6_addr_copy(&mldq->mld_mca, group); | |
478 | ||
479 | /* checksum */ | |
480 | mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
481 | sizeof(*mldq), IPPROTO_ICMPV6, | |
482 | csum_partial(mldq, | |
483 | sizeof(*mldq), 0)); | |
484 | skb_put(skb, sizeof(*mldq)); | |
485 | ||
486 | __skb_pull(skb, sizeof(*eth)); | |
487 | ||
488 | out: | |
489 | return skb; | |
490 | } | |
491 | #endif | |
492 | ||
8ef2a9a5 YH |
493 | static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br, |
494 | struct br_ip *addr) | |
495 | { | |
496 | switch (addr->proto) { | |
497 | case htons(ETH_P_IP): | |
498 | return br_ip4_multicast_alloc_query(br, addr->u.ip4); | |
08b202b6 YH |
499 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
500 | case htons(ETH_P_IPV6): | |
501 | return br_ip6_multicast_alloc_query(br, &addr->u.ip6); | |
502 | #endif | |
8ef2a9a5 YH |
503 | } |
504 | return NULL; | |
505 | } | |
506 | ||
eb1d1641 HX |
507 | static void br_multicast_send_group_query(struct net_bridge_mdb_entry *mp) |
508 | { | |
509 | struct net_bridge *br = mp->br; | |
510 | struct sk_buff *skb; | |
511 | ||
8ef2a9a5 | 512 | skb = br_multicast_alloc_query(br, &mp->addr); |
eb1d1641 HX |
513 | if (!skb) |
514 | goto timer; | |
515 | ||
516 | netif_rx(skb); | |
517 | ||
518 | timer: | |
519 | if (++mp->queries_sent < br->multicast_last_member_count) | |
520 | mod_timer(&mp->query_timer, | |
521 | jiffies + br->multicast_last_member_interval); | |
522 | } | |
523 | ||
524 | static void br_multicast_group_query_expired(unsigned long data) | |
525 | { | |
526 | struct net_bridge_mdb_entry *mp = (void *)data; | |
527 | struct net_bridge *br = mp->br; | |
528 | ||
529 | spin_lock(&br->multicast_lock); | |
8a870178 | 530 | if (!netif_running(br->dev) || !mp->mglist || |
eb1d1641 HX |
531 | mp->queries_sent >= br->multicast_last_member_count) |
532 | goto out; | |
533 | ||
534 | br_multicast_send_group_query(mp); | |
535 | ||
536 | out: | |
537 | spin_unlock(&br->multicast_lock); | |
538 | } | |
539 | ||
540 | static void br_multicast_send_port_group_query(struct net_bridge_port_group *pg) | |
541 | { | |
542 | struct net_bridge_port *port = pg->port; | |
543 | struct net_bridge *br = port->br; | |
544 | struct sk_buff *skb; | |
545 | ||
8ef2a9a5 | 546 | skb = br_multicast_alloc_query(br, &pg->addr); |
eb1d1641 HX |
547 | if (!skb) |
548 | goto timer; | |
549 | ||
550 | br_deliver(port, skb); | |
551 | ||
552 | timer: | |
553 | if (++pg->queries_sent < br->multicast_last_member_count) | |
554 | mod_timer(&pg->query_timer, | |
555 | jiffies + br->multicast_last_member_interval); | |
556 | } | |
557 | ||
558 | static void br_multicast_port_group_query_expired(unsigned long data) | |
559 | { | |
560 | struct net_bridge_port_group *pg = (void *)data; | |
561 | struct net_bridge_port *port = pg->port; | |
562 | struct net_bridge *br = port->br; | |
563 | ||
564 | spin_lock(&br->multicast_lock); | |
565 | if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) || | |
566 | pg->queries_sent >= br->multicast_last_member_count) | |
567 | goto out; | |
568 | ||
569 | br_multicast_send_port_group_query(pg); | |
570 | ||
571 | out: | |
572 | spin_unlock(&br->multicast_lock); | |
573 | } | |
574 | ||
575 | static struct net_bridge_mdb_entry *br_multicast_get_group( | |
8ef2a9a5 YH |
576 | struct net_bridge *br, struct net_bridge_port *port, |
577 | struct br_ip *group, int hash) | |
eb1d1641 | 578 | { |
e8051688 | 579 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 HX |
580 | struct net_bridge_mdb_entry *mp; |
581 | struct hlist_node *p; | |
582 | unsigned count = 0; | |
583 | unsigned max; | |
584 | int elasticity; | |
585 | int err; | |
586 | ||
e8051688 | 587 | mdb = rcu_dereference_protected(br->mdb, 1); |
eb1d1641 HX |
588 | hlist_for_each_entry(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) { |
589 | count++; | |
8ef2a9a5 | 590 | if (unlikely(br_ip_equal(group, &mp->addr))) |
eb1d1641 | 591 | return mp; |
eb1d1641 HX |
592 | } |
593 | ||
594 | elasticity = 0; | |
595 | max = mdb->max; | |
596 | ||
597 | if (unlikely(count > br->hash_elasticity && count)) { | |
598 | if (net_ratelimit()) | |
28a16c97 | 599 | br_info(br, "Multicast hash table " |
600 | "chain limit reached: %s\n", | |
601 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
602 | |
603 | elasticity = br->hash_elasticity; | |
604 | } | |
605 | ||
606 | if (mdb->size >= max) { | |
607 | max *= 2; | |
608 | if (unlikely(max >= br->hash_max)) { | |
28a16c97 | 609 | br_warn(br, "Multicast hash table maximum " |
610 | "reached, disabling snooping: %s, %d\n", | |
611 | port ? port->dev->name : br->dev->name, max); | |
eb1d1641 HX |
612 | err = -E2BIG; |
613 | disable: | |
614 | br->multicast_disabled = 1; | |
615 | goto err; | |
616 | } | |
617 | } | |
618 | ||
619 | if (max > mdb->max || elasticity) { | |
620 | if (mdb->old) { | |
621 | if (net_ratelimit()) | |
28a16c97 | 622 | br_info(br, "Multicast hash table " |
623 | "on fire: %s\n", | |
624 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
625 | err = -EEXIST; |
626 | goto err; | |
627 | } | |
628 | ||
629 | err = br_mdb_rehash(&br->mdb, max, elasticity); | |
630 | if (err) { | |
28a16c97 | 631 | br_warn(br, "Cannot rehash multicast " |
632 | "hash table, disabling snooping: %s, %d, %d\n", | |
633 | port ? port->dev->name : br->dev->name, | |
634 | mdb->size, err); | |
eb1d1641 HX |
635 | goto disable; |
636 | } | |
637 | ||
638 | err = -EAGAIN; | |
639 | goto err; | |
640 | } | |
641 | ||
642 | return NULL; | |
643 | ||
644 | err: | |
645 | mp = ERR_PTR(err); | |
646 | return mp; | |
647 | } | |
648 | ||
649 | static struct net_bridge_mdb_entry *br_multicast_new_group( | |
8ef2a9a5 YH |
650 | struct net_bridge *br, struct net_bridge_port *port, |
651 | struct br_ip *group) | |
eb1d1641 | 652 | { |
e8051688 | 653 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 HX |
654 | struct net_bridge_mdb_entry *mp; |
655 | int hash; | |
4c0833bc | 656 | int err; |
eb1d1641 | 657 | |
e8051688 | 658 | mdb = rcu_dereference_protected(br->mdb, 1); |
eb1d1641 | 659 | if (!mdb) { |
4c0833bc TK |
660 | err = br_mdb_rehash(&br->mdb, BR_HASH_SIZE, 0); |
661 | if (err) | |
662 | return ERR_PTR(err); | |
eb1d1641 HX |
663 | goto rehash; |
664 | } | |
665 | ||
666 | hash = br_ip_hash(mdb, group); | |
667 | mp = br_multicast_get_group(br, port, group, hash); | |
668 | switch (PTR_ERR(mp)) { | |
669 | case 0: | |
670 | break; | |
671 | ||
672 | case -EAGAIN: | |
673 | rehash: | |
e8051688 | 674 | mdb = rcu_dereference_protected(br->mdb, 1); |
eb1d1641 HX |
675 | hash = br_ip_hash(mdb, group); |
676 | break; | |
677 | ||
678 | default: | |
679 | goto out; | |
680 | } | |
681 | ||
682 | mp = kzalloc(sizeof(*mp), GFP_ATOMIC); | |
683 | if (unlikely(!mp)) | |
4c0833bc | 684 | return ERR_PTR(-ENOMEM); |
eb1d1641 HX |
685 | |
686 | mp->br = br; | |
8ef2a9a5 | 687 | mp->addr = *group; |
eb1d1641 HX |
688 | setup_timer(&mp->timer, br_multicast_group_expired, |
689 | (unsigned long)mp); | |
690 | setup_timer(&mp->query_timer, br_multicast_group_query_expired, | |
691 | (unsigned long)mp); | |
692 | ||
693 | hlist_add_head_rcu(&mp->hlist[mdb->ver], &mdb->mhash[hash]); | |
694 | mdb->size++; | |
695 | ||
696 | out: | |
697 | return mp; | |
698 | } | |
699 | ||
700 | static int br_multicast_add_group(struct net_bridge *br, | |
8ef2a9a5 YH |
701 | struct net_bridge_port *port, |
702 | struct br_ip *group) | |
eb1d1641 HX |
703 | { |
704 | struct net_bridge_mdb_entry *mp; | |
705 | struct net_bridge_port_group *p; | |
e8051688 | 706 | struct net_bridge_port_group __rcu **pp; |
eb1d1641 HX |
707 | unsigned long now = jiffies; |
708 | int err; | |
709 | ||
eb1d1641 HX |
710 | spin_lock(&br->multicast_lock); |
711 | if (!netif_running(br->dev) || | |
712 | (port && port->state == BR_STATE_DISABLED)) | |
713 | goto out; | |
714 | ||
715 | mp = br_multicast_new_group(br, port, group); | |
716 | err = PTR_ERR(mp); | |
4c0833bc | 717 | if (IS_ERR(mp)) |
eb1d1641 HX |
718 | goto err; |
719 | ||
720 | if (!port) { | |
8a870178 | 721 | mp->mglist = true; |
eb1d1641 HX |
722 | mod_timer(&mp->timer, now + br->multicast_membership_interval); |
723 | goto out; | |
724 | } | |
725 | ||
e8051688 ED |
726 | for (pp = &mp->ports; |
727 | (p = mlock_dereference(*pp, br)) != NULL; | |
728 | pp = &p->next) { | |
eb1d1641 HX |
729 | if (p->port == port) |
730 | goto found; | |
731 | if ((unsigned long)p->port < (unsigned long)port) | |
732 | break; | |
733 | } | |
734 | ||
735 | p = kzalloc(sizeof(*p), GFP_ATOMIC); | |
736 | err = -ENOMEM; | |
737 | if (unlikely(!p)) | |
738 | goto err; | |
739 | ||
8ef2a9a5 | 740 | p->addr = *group; |
eb1d1641 HX |
741 | p->port = port; |
742 | p->next = *pp; | |
743 | hlist_add_head(&p->mglist, &port->mglist); | |
744 | setup_timer(&p->timer, br_multicast_port_group_expired, | |
745 | (unsigned long)p); | |
746 | setup_timer(&p->query_timer, br_multicast_port_group_query_expired, | |
747 | (unsigned long)p); | |
748 | ||
749 | rcu_assign_pointer(*pp, p); | |
750 | ||
751 | found: | |
752 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
753 | out: | |
754 | err = 0; | |
755 | ||
756 | err: | |
757 | spin_unlock(&br->multicast_lock); | |
758 | return err; | |
759 | } | |
760 | ||
8ef2a9a5 YH |
761 | static int br_ip4_multicast_add_group(struct net_bridge *br, |
762 | struct net_bridge_port *port, | |
763 | __be32 group) | |
764 | { | |
765 | struct br_ip br_group; | |
766 | ||
767 | if (ipv4_is_local_multicast(group)) | |
768 | return 0; | |
769 | ||
770 | br_group.u.ip4 = group; | |
771 | br_group.proto = htons(ETH_P_IP); | |
772 | ||
773 | return br_multicast_add_group(br, port, &br_group); | |
774 | } | |
775 | ||
08b202b6 YH |
776 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
777 | static int br_ip6_multicast_add_group(struct net_bridge *br, | |
778 | struct net_bridge_port *port, | |
779 | const struct in6_addr *group) | |
780 | { | |
781 | struct br_ip br_group; | |
782 | ||
e4de9f9e | 783 | if (!ipv6_is_transient_multicast(group)) |
08b202b6 YH |
784 | return 0; |
785 | ||
786 | ipv6_addr_copy(&br_group.u.ip6, group); | |
9cc6e0c4 | 787 | br_group.proto = htons(ETH_P_IPV6); |
08b202b6 YH |
788 | |
789 | return br_multicast_add_group(br, port, &br_group); | |
790 | } | |
791 | #endif | |
792 | ||
eb1d1641 HX |
793 | static void br_multicast_router_expired(unsigned long data) |
794 | { | |
795 | struct net_bridge_port *port = (void *)data; | |
796 | struct net_bridge *br = port->br; | |
797 | ||
798 | spin_lock(&br->multicast_lock); | |
799 | if (port->multicast_router != 1 || | |
800 | timer_pending(&port->multicast_router_timer) || | |
801 | hlist_unhashed(&port->rlist)) | |
802 | goto out; | |
803 | ||
804 | hlist_del_init_rcu(&port->rlist); | |
805 | ||
806 | out: | |
807 | spin_unlock(&br->multicast_lock); | |
808 | } | |
809 | ||
810 | static void br_multicast_local_router_expired(unsigned long data) | |
811 | { | |
812 | } | |
813 | ||
8ef2a9a5 YH |
814 | static void __br_multicast_send_query(struct net_bridge *br, |
815 | struct net_bridge_port *port, | |
816 | struct br_ip *ip) | |
eb1d1641 | 817 | { |
eb1d1641 HX |
818 | struct sk_buff *skb; |
819 | ||
8ef2a9a5 | 820 | skb = br_multicast_alloc_query(br, ip); |
eb1d1641 | 821 | if (!skb) |
8ef2a9a5 | 822 | return; |
eb1d1641 HX |
823 | |
824 | if (port) { | |
825 | __skb_push(skb, sizeof(struct ethhdr)); | |
826 | skb->dev = port->dev; | |
713aefa3 | 827 | NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev, |
eb1d1641 HX |
828 | dev_queue_xmit); |
829 | } else | |
830 | netif_rx(skb); | |
8ef2a9a5 YH |
831 | } |
832 | ||
833 | static void br_multicast_send_query(struct net_bridge *br, | |
834 | struct net_bridge_port *port, u32 sent) | |
835 | { | |
836 | unsigned long time; | |
837 | struct br_ip br_group; | |
838 | ||
839 | if (!netif_running(br->dev) || br->multicast_disabled || | |
840 | timer_pending(&br->multicast_querier_timer)) | |
841 | return; | |
842 | ||
08b202b6 YH |
843 | memset(&br_group.u, 0, sizeof(br_group.u)); |
844 | ||
8ef2a9a5 | 845 | br_group.proto = htons(ETH_P_IP); |
08b202b6 | 846 | __br_multicast_send_query(br, port, &br_group); |
8ef2a9a5 | 847 | |
08b202b6 YH |
848 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
849 | br_group.proto = htons(ETH_P_IPV6); | |
8ef2a9a5 | 850 | __br_multicast_send_query(br, port, &br_group); |
08b202b6 | 851 | #endif |
eb1d1641 | 852 | |
eb1d1641 HX |
853 | time = jiffies; |
854 | time += sent < br->multicast_startup_query_count ? | |
855 | br->multicast_startup_query_interval : | |
856 | br->multicast_query_interval; | |
857 | mod_timer(port ? &port->multicast_query_timer : | |
858 | &br->multicast_query_timer, time); | |
859 | } | |
860 | ||
861 | static void br_multicast_port_query_expired(unsigned long data) | |
862 | { | |
863 | struct net_bridge_port *port = (void *)data; | |
864 | struct net_bridge *br = port->br; | |
865 | ||
866 | spin_lock(&br->multicast_lock); | |
02a780c0 DC |
867 | if (port->state == BR_STATE_DISABLED || |
868 | port->state == BR_STATE_BLOCKING) | |
eb1d1641 HX |
869 | goto out; |
870 | ||
871 | if (port->multicast_startup_queries_sent < | |
872 | br->multicast_startup_query_count) | |
873 | port->multicast_startup_queries_sent++; | |
874 | ||
875 | br_multicast_send_query(port->br, port, | |
876 | port->multicast_startup_queries_sent); | |
877 | ||
878 | out: | |
879 | spin_unlock(&br->multicast_lock); | |
880 | } | |
881 | ||
882 | void br_multicast_add_port(struct net_bridge_port *port) | |
883 | { | |
884 | port->multicast_router = 1; | |
885 | ||
886 | setup_timer(&port->multicast_router_timer, br_multicast_router_expired, | |
887 | (unsigned long)port); | |
888 | setup_timer(&port->multicast_query_timer, | |
889 | br_multicast_port_query_expired, (unsigned long)port); | |
890 | } | |
891 | ||
892 | void br_multicast_del_port(struct net_bridge_port *port) | |
893 | { | |
894 | del_timer_sync(&port->multicast_router_timer); | |
895 | } | |
896 | ||
561f1103 HX |
897 | static void __br_multicast_enable_port(struct net_bridge_port *port) |
898 | { | |
899 | port->multicast_startup_queries_sent = 0; | |
900 | ||
901 | if (try_to_del_timer_sync(&port->multicast_query_timer) >= 0 || | |
902 | del_timer(&port->multicast_query_timer)) | |
903 | mod_timer(&port->multicast_query_timer, jiffies); | |
904 | } | |
905 | ||
eb1d1641 HX |
906 | void br_multicast_enable_port(struct net_bridge_port *port) |
907 | { | |
908 | struct net_bridge *br = port->br; | |
909 | ||
910 | spin_lock(&br->multicast_lock); | |
911 | if (br->multicast_disabled || !netif_running(br->dev)) | |
912 | goto out; | |
913 | ||
561f1103 | 914 | __br_multicast_enable_port(port); |
eb1d1641 HX |
915 | |
916 | out: | |
917 | spin_unlock(&br->multicast_lock); | |
918 | } | |
919 | ||
920 | void br_multicast_disable_port(struct net_bridge_port *port) | |
921 | { | |
922 | struct net_bridge *br = port->br; | |
923 | struct net_bridge_port_group *pg; | |
924 | struct hlist_node *p, *n; | |
925 | ||
926 | spin_lock(&br->multicast_lock); | |
927 | hlist_for_each_entry_safe(pg, p, n, &port->mglist, mglist) | |
928 | br_multicast_del_pg(br, pg); | |
929 | ||
930 | if (!hlist_unhashed(&port->rlist)) | |
931 | hlist_del_init_rcu(&port->rlist); | |
932 | del_timer(&port->multicast_router_timer); | |
933 | del_timer(&port->multicast_query_timer); | |
934 | spin_unlock(&br->multicast_lock); | |
935 | } | |
936 | ||
8ef2a9a5 YH |
937 | static int br_ip4_multicast_igmp3_report(struct net_bridge *br, |
938 | struct net_bridge_port *port, | |
939 | struct sk_buff *skb) | |
eb1d1641 HX |
940 | { |
941 | struct igmpv3_report *ih; | |
942 | struct igmpv3_grec *grec; | |
943 | int i; | |
944 | int len; | |
945 | int num; | |
946 | int type; | |
947 | int err = 0; | |
948 | __be32 group; | |
949 | ||
950 | if (!pskb_may_pull(skb, sizeof(*ih))) | |
951 | return -EINVAL; | |
952 | ||
953 | ih = igmpv3_report_hdr(skb); | |
954 | num = ntohs(ih->ngrec); | |
955 | len = sizeof(*ih); | |
956 | ||
957 | for (i = 0; i < num; i++) { | |
958 | len += sizeof(*grec); | |
959 | if (!pskb_may_pull(skb, len)) | |
960 | return -EINVAL; | |
961 | ||
fd218cf9 | 962 | grec = (void *)(skb->data + len - sizeof(*grec)); |
eb1d1641 HX |
963 | group = grec->grec_mca; |
964 | type = grec->grec_type; | |
965 | ||
8eabf95c | 966 | len += ntohs(grec->grec_nsrcs) * 4; |
eb1d1641 HX |
967 | if (!pskb_may_pull(skb, len)) |
968 | return -EINVAL; | |
969 | ||
970 | /* We treat this as an IGMPv2 report for now. */ | |
971 | switch (type) { | |
972 | case IGMPV3_MODE_IS_INCLUDE: | |
973 | case IGMPV3_MODE_IS_EXCLUDE: | |
974 | case IGMPV3_CHANGE_TO_INCLUDE: | |
975 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
976 | case IGMPV3_ALLOW_NEW_SOURCES: | |
977 | case IGMPV3_BLOCK_OLD_SOURCES: | |
978 | break; | |
979 | ||
980 | default: | |
981 | continue; | |
982 | } | |
983 | ||
8ef2a9a5 | 984 | err = br_ip4_multicast_add_group(br, port, group); |
eb1d1641 HX |
985 | if (err) |
986 | break; | |
987 | } | |
988 | ||
989 | return err; | |
990 | } | |
991 | ||
08b202b6 YH |
992 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
993 | static int br_ip6_multicast_mld2_report(struct net_bridge *br, | |
994 | struct net_bridge_port *port, | |
995 | struct sk_buff *skb) | |
996 | { | |
997 | struct icmp6hdr *icmp6h; | |
998 | struct mld2_grec *grec; | |
999 | int i; | |
1000 | int len; | |
1001 | int num; | |
1002 | int err = 0; | |
1003 | ||
1004 | if (!pskb_may_pull(skb, sizeof(*icmp6h))) | |
1005 | return -EINVAL; | |
1006 | ||
1007 | icmp6h = icmp6_hdr(skb); | |
1008 | num = ntohs(icmp6h->icmp6_dataun.un_data16[1]); | |
1009 | len = sizeof(*icmp6h); | |
1010 | ||
1011 | for (i = 0; i < num; i++) { | |
1012 | __be16 *nsrcs, _nsrcs; | |
1013 | ||
1014 | nsrcs = skb_header_pointer(skb, | |
1015 | len + offsetof(struct mld2_grec, | |
649e984d | 1016 | grec_nsrcs), |
08b202b6 YH |
1017 | sizeof(_nsrcs), &_nsrcs); |
1018 | if (!nsrcs) | |
1019 | return -EINVAL; | |
1020 | ||
1021 | if (!pskb_may_pull(skb, | |
1022 | len + sizeof(*grec) + | |
d41db9f3 | 1023 | sizeof(struct in6_addr) * ntohs(*nsrcs))) |
08b202b6 YH |
1024 | return -EINVAL; |
1025 | ||
1026 | grec = (struct mld2_grec *)(skb->data + len); | |
d41db9f3 LL |
1027 | len += sizeof(*grec) + |
1028 | sizeof(struct in6_addr) * ntohs(*nsrcs); | |
08b202b6 YH |
1029 | |
1030 | /* We treat these as MLDv1 reports for now. */ | |
1031 | switch (grec->grec_type) { | |
1032 | case MLD2_MODE_IS_INCLUDE: | |
1033 | case MLD2_MODE_IS_EXCLUDE: | |
1034 | case MLD2_CHANGE_TO_INCLUDE: | |
1035 | case MLD2_CHANGE_TO_EXCLUDE: | |
1036 | case MLD2_ALLOW_NEW_SOURCES: | |
1037 | case MLD2_BLOCK_OLD_SOURCES: | |
1038 | break; | |
1039 | ||
1040 | default: | |
1041 | continue; | |
1042 | } | |
1043 | ||
1044 | err = br_ip6_multicast_add_group(br, port, &grec->grec_mca); | |
1045 | if (!err) | |
1046 | break; | |
1047 | } | |
1048 | ||
1049 | return err; | |
1050 | } | |
1051 | #endif | |
1052 | ||
7e80c124 | 1053 | /* |
1054 | * Add port to rotuer_list | |
1055 | * list is maintained ordered by pointer value | |
1056 | * and locked by br->multicast_lock and RCU | |
1057 | */ | |
0909e117 HX |
1058 | static void br_multicast_add_router(struct net_bridge *br, |
1059 | struct net_bridge_port *port) | |
1060 | { | |
dcdca2c4 | 1061 | struct net_bridge_port *p; |
7e80c124 | 1062 | struct hlist_node *n, *slot = NULL; |
dcdca2c4 | 1063 | |
709b9326 | 1064 | hlist_for_each_entry(p, n, &br->router_list, rlist) { |
7e80c124 | 1065 | if ((unsigned long) port >= (unsigned long) p) |
1066 | break; | |
1067 | slot = n; | |
dcdca2c4 | 1068 | } |
1069 | ||
7e80c124 | 1070 | if (slot) |
1071 | hlist_add_after_rcu(slot, &port->rlist); | |
dcdca2c4 | 1072 | else |
1073 | hlist_add_head_rcu(&port->rlist, &br->router_list); | |
0909e117 HX |
1074 | } |
1075 | ||
eb1d1641 HX |
1076 | static void br_multicast_mark_router(struct net_bridge *br, |
1077 | struct net_bridge_port *port) | |
1078 | { | |
1079 | unsigned long now = jiffies; | |
eb1d1641 HX |
1080 | |
1081 | if (!port) { | |
1082 | if (br->multicast_router == 1) | |
1083 | mod_timer(&br->multicast_router_timer, | |
1084 | now + br->multicast_querier_interval); | |
1085 | return; | |
1086 | } | |
1087 | ||
1088 | if (port->multicast_router != 1) | |
1089 | return; | |
1090 | ||
1091 | if (!hlist_unhashed(&port->rlist)) | |
1092 | goto timer; | |
1093 | ||
0909e117 | 1094 | br_multicast_add_router(br, port); |
eb1d1641 HX |
1095 | |
1096 | timer: | |
1097 | mod_timer(&port->multicast_router_timer, | |
1098 | now + br->multicast_querier_interval); | |
1099 | } | |
1100 | ||
1101 | static void br_multicast_query_received(struct net_bridge *br, | |
1102 | struct net_bridge_port *port, | |
8ef2a9a5 | 1103 | int saddr) |
eb1d1641 HX |
1104 | { |
1105 | if (saddr) | |
1106 | mod_timer(&br->multicast_querier_timer, | |
1107 | jiffies + br->multicast_querier_interval); | |
1108 | else if (timer_pending(&br->multicast_querier_timer)) | |
1109 | return; | |
1110 | ||
1111 | br_multicast_mark_router(br, port); | |
1112 | } | |
1113 | ||
8ef2a9a5 YH |
1114 | static int br_ip4_multicast_query(struct net_bridge *br, |
1115 | struct net_bridge_port *port, | |
1116 | struct sk_buff *skb) | |
eb1d1641 | 1117 | { |
b71d1d42 | 1118 | const struct iphdr *iph = ip_hdr(skb); |
eb1d1641 HX |
1119 | struct igmphdr *ih = igmp_hdr(skb); |
1120 | struct net_bridge_mdb_entry *mp; | |
1121 | struct igmpv3_query *ih3; | |
1122 | struct net_bridge_port_group *p; | |
e8051688 | 1123 | struct net_bridge_port_group __rcu **pp; |
eb1d1641 HX |
1124 | unsigned long max_delay; |
1125 | unsigned long now = jiffies; | |
1126 | __be32 group; | |
bec68ff1 | 1127 | int err = 0; |
eb1d1641 HX |
1128 | |
1129 | spin_lock(&br->multicast_lock); | |
1130 | if (!netif_running(br->dev) || | |
1131 | (port && port->state == BR_STATE_DISABLED)) | |
1132 | goto out; | |
1133 | ||
8ef2a9a5 | 1134 | br_multicast_query_received(br, port, !!iph->saddr); |
eb1d1641 HX |
1135 | |
1136 | group = ih->group; | |
1137 | ||
1138 | if (skb->len == sizeof(*ih)) { | |
1139 | max_delay = ih->code * (HZ / IGMP_TIMER_SCALE); | |
1140 | ||
1141 | if (!max_delay) { | |
1142 | max_delay = 10 * HZ; | |
1143 | group = 0; | |
1144 | } | |
1145 | } else { | |
bec68ff1 YH |
1146 | if (!pskb_may_pull(skb, sizeof(struct igmpv3_query))) { |
1147 | err = -EINVAL; | |
1148 | goto out; | |
1149 | } | |
eb1d1641 HX |
1150 | |
1151 | ih3 = igmpv3_query_hdr(skb); | |
1152 | if (ih3->nsrcs) | |
bec68ff1 | 1153 | goto out; |
eb1d1641 | 1154 | |
0ba8c9ec YH |
1155 | max_delay = ih3->code ? |
1156 | IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1; | |
eb1d1641 HX |
1157 | } |
1158 | ||
1159 | if (!group) | |
1160 | goto out; | |
1161 | ||
e8051688 | 1162 | mp = br_mdb_ip4_get(mlock_dereference(br->mdb, br), group); |
eb1d1641 HX |
1163 | if (!mp) |
1164 | goto out; | |
1165 | ||
1166 | max_delay *= br->multicast_last_member_count; | |
1167 | ||
8a870178 | 1168 | if (mp->mglist && |
eb1d1641 HX |
1169 | (timer_pending(&mp->timer) ? |
1170 | time_after(mp->timer.expires, now + max_delay) : | |
1171 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1172 | mod_timer(&mp->timer, now + max_delay); | |
1173 | ||
e8051688 ED |
1174 | for (pp = &mp->ports; |
1175 | (p = mlock_dereference(*pp, br)) != NULL; | |
1176 | pp = &p->next) { | |
eb1d1641 HX |
1177 | if (timer_pending(&p->timer) ? |
1178 | time_after(p->timer.expires, now + max_delay) : | |
1179 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1180 | mod_timer(&p->timer, now + max_delay); |
eb1d1641 HX |
1181 | } |
1182 | ||
1183 | out: | |
1184 | spin_unlock(&br->multicast_lock); | |
bec68ff1 | 1185 | return err; |
eb1d1641 HX |
1186 | } |
1187 | ||
08b202b6 YH |
1188 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
1189 | static int br_ip6_multicast_query(struct net_bridge *br, | |
1190 | struct net_bridge_port *port, | |
1191 | struct sk_buff *skb) | |
1192 | { | |
b71d1d42 | 1193 | const struct ipv6hdr *ip6h = ipv6_hdr(skb); |
08b202b6 YH |
1194 | struct mld_msg *mld = (struct mld_msg *) icmp6_hdr(skb); |
1195 | struct net_bridge_mdb_entry *mp; | |
1196 | struct mld2_query *mld2q; | |
e8051688 ED |
1197 | struct net_bridge_port_group *p; |
1198 | struct net_bridge_port_group __rcu **pp; | |
08b202b6 YH |
1199 | unsigned long max_delay; |
1200 | unsigned long now = jiffies; | |
b71d1d42 | 1201 | const struct in6_addr *group = NULL; |
08b202b6 YH |
1202 | int err = 0; |
1203 | ||
1204 | spin_lock(&br->multicast_lock); | |
1205 | if (!netif_running(br->dev) || | |
1206 | (port && port->state == BR_STATE_DISABLED)) | |
1207 | goto out; | |
1208 | ||
1209 | br_multicast_query_received(br, port, !ipv6_addr_any(&ip6h->saddr)); | |
1210 | ||
1211 | if (skb->len == sizeof(*mld)) { | |
1212 | if (!pskb_may_pull(skb, sizeof(*mld))) { | |
1213 | err = -EINVAL; | |
1214 | goto out; | |
1215 | } | |
1216 | mld = (struct mld_msg *) icmp6_hdr(skb); | |
1217 | max_delay = msecs_to_jiffies(htons(mld->mld_maxdelay)); | |
1218 | if (max_delay) | |
1219 | group = &mld->mld_mca; | |
1220 | } else if (skb->len >= sizeof(*mld2q)) { | |
1221 | if (!pskb_may_pull(skb, sizeof(*mld2q))) { | |
1222 | err = -EINVAL; | |
1223 | goto out; | |
1224 | } | |
1225 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
1226 | if (!mld2q->mld2q_nsrcs) | |
1227 | group = &mld2q->mld2q_mca; | |
1228 | max_delay = mld2q->mld2q_mrc ? MLDV2_MRC(mld2q->mld2q_mrc) : 1; | |
1229 | } | |
1230 | ||
1231 | if (!group) | |
1232 | goto out; | |
1233 | ||
e8051688 | 1234 | mp = br_mdb_ip6_get(mlock_dereference(br->mdb, br), group); |
08b202b6 YH |
1235 | if (!mp) |
1236 | goto out; | |
1237 | ||
1238 | max_delay *= br->multicast_last_member_count; | |
8a870178 | 1239 | if (mp->mglist && |
08b202b6 YH |
1240 | (timer_pending(&mp->timer) ? |
1241 | time_after(mp->timer.expires, now + max_delay) : | |
1242 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1243 | mod_timer(&mp->timer, now + max_delay); | |
1244 | ||
e8051688 ED |
1245 | for (pp = &mp->ports; |
1246 | (p = mlock_dereference(*pp, br)) != NULL; | |
1247 | pp = &p->next) { | |
08b202b6 YH |
1248 | if (timer_pending(&p->timer) ? |
1249 | time_after(p->timer.expires, now + max_delay) : | |
1250 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1251 | mod_timer(&p->timer, now + max_delay); |
08b202b6 YH |
1252 | } |
1253 | ||
1254 | out: | |
1255 | spin_unlock(&br->multicast_lock); | |
1256 | return err; | |
1257 | } | |
1258 | #endif | |
1259 | ||
eb1d1641 HX |
1260 | static void br_multicast_leave_group(struct net_bridge *br, |
1261 | struct net_bridge_port *port, | |
8ef2a9a5 | 1262 | struct br_ip *group) |
eb1d1641 HX |
1263 | { |
1264 | struct net_bridge_mdb_htable *mdb; | |
1265 | struct net_bridge_mdb_entry *mp; | |
1266 | struct net_bridge_port_group *p; | |
1267 | unsigned long now; | |
1268 | unsigned long time; | |
1269 | ||
eb1d1641 HX |
1270 | spin_lock(&br->multicast_lock); |
1271 | if (!netif_running(br->dev) || | |
1272 | (port && port->state == BR_STATE_DISABLED) || | |
1273 | timer_pending(&br->multicast_querier_timer)) | |
1274 | goto out; | |
1275 | ||
e8051688 | 1276 | mdb = mlock_dereference(br->mdb, br); |
eb1d1641 HX |
1277 | mp = br_mdb_ip_get(mdb, group); |
1278 | if (!mp) | |
1279 | goto out; | |
1280 | ||
1281 | now = jiffies; | |
1282 | time = now + br->multicast_last_member_count * | |
1283 | br->multicast_last_member_interval; | |
1284 | ||
1285 | if (!port) { | |
8a870178 | 1286 | if (mp->mglist && |
eb1d1641 HX |
1287 | (timer_pending(&mp->timer) ? |
1288 | time_after(mp->timer.expires, time) : | |
1289 | try_to_del_timer_sync(&mp->timer) >= 0)) { | |
1290 | mod_timer(&mp->timer, time); | |
1291 | ||
1292 | mp->queries_sent = 0; | |
1293 | mod_timer(&mp->query_timer, now); | |
1294 | } | |
1295 | ||
1296 | goto out; | |
1297 | } | |
1298 | ||
e8051688 ED |
1299 | for (p = mlock_dereference(mp->ports, br); |
1300 | p != NULL; | |
1301 | p = mlock_dereference(p->next, br)) { | |
eb1d1641 HX |
1302 | if (p->port != port) |
1303 | continue; | |
1304 | ||
1305 | if (!hlist_unhashed(&p->mglist) && | |
1306 | (timer_pending(&p->timer) ? | |
1307 | time_after(p->timer.expires, time) : | |
1308 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1309 | mod_timer(&p->timer, time); | |
1310 | ||
1311 | p->queries_sent = 0; | |
1312 | mod_timer(&p->query_timer, now); | |
1313 | } | |
1314 | ||
1315 | break; | |
1316 | } | |
1317 | ||
1318 | out: | |
1319 | spin_unlock(&br->multicast_lock); | |
1320 | } | |
1321 | ||
8ef2a9a5 YH |
1322 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
1323 | struct net_bridge_port *port, | |
1324 | __be32 group) | |
1325 | { | |
1326 | struct br_ip br_group; | |
1327 | ||
1328 | if (ipv4_is_local_multicast(group)) | |
1329 | return; | |
1330 | ||
1331 | br_group.u.ip4 = group; | |
1332 | br_group.proto = htons(ETH_P_IP); | |
1333 | ||
1334 | br_multicast_leave_group(br, port, &br_group); | |
1335 | } | |
1336 | ||
08b202b6 YH |
1337 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
1338 | static void br_ip6_multicast_leave_group(struct net_bridge *br, | |
1339 | struct net_bridge_port *port, | |
1340 | const struct in6_addr *group) | |
1341 | { | |
1342 | struct br_ip br_group; | |
1343 | ||
e4de9f9e | 1344 | if (!ipv6_is_transient_multicast(group)) |
08b202b6 YH |
1345 | return; |
1346 | ||
1347 | ipv6_addr_copy(&br_group.u.ip6, group); | |
1348 | br_group.proto = htons(ETH_P_IPV6); | |
1349 | ||
1350 | br_multicast_leave_group(br, port, &br_group); | |
1351 | } | |
1352 | #endif | |
8ef2a9a5 | 1353 | |
eb1d1641 HX |
1354 | static int br_multicast_ipv4_rcv(struct net_bridge *br, |
1355 | struct net_bridge_port *port, | |
1356 | struct sk_buff *skb) | |
1357 | { | |
1358 | struct sk_buff *skb2 = skb; | |
b71d1d42 | 1359 | const struct iphdr *iph; |
eb1d1641 HX |
1360 | struct igmphdr *ih; |
1361 | unsigned len; | |
1362 | unsigned offset; | |
1363 | int err; | |
1364 | ||
eb1d1641 HX |
1365 | /* We treat OOM as packet loss for now. */ |
1366 | if (!pskb_may_pull(skb, sizeof(*iph))) | |
1367 | return -EINVAL; | |
1368 | ||
1369 | iph = ip_hdr(skb); | |
1370 | ||
1371 | if (iph->ihl < 5 || iph->version != 4) | |
1372 | return -EINVAL; | |
1373 | ||
1374 | if (!pskb_may_pull(skb, ip_hdrlen(skb))) | |
1375 | return -EINVAL; | |
1376 | ||
1377 | iph = ip_hdr(skb); | |
1378 | ||
1379 | if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl))) | |
1380 | return -EINVAL; | |
1381 | ||
bd4265fe HX |
1382 | if (iph->protocol != IPPROTO_IGMP) { |
1383 | if ((iph->daddr & IGMP_LOCAL_GROUP_MASK) != IGMP_LOCAL_GROUP) | |
1384 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
eb1d1641 | 1385 | return 0; |
bd4265fe | 1386 | } |
eb1d1641 HX |
1387 | |
1388 | len = ntohs(iph->tot_len); | |
1389 | if (skb->len < len || len < ip_hdrlen(skb)) | |
1390 | return -EINVAL; | |
1391 | ||
1392 | if (skb->len > len) { | |
1393 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
1394 | if (!skb2) | |
1395 | return -ENOMEM; | |
1396 | ||
1397 | err = pskb_trim_rcsum(skb2, len); | |
1398 | if (err) | |
8440853b | 1399 | goto err_out; |
eb1d1641 HX |
1400 | } |
1401 | ||
1402 | len -= ip_hdrlen(skb2); | |
1403 | offset = skb_network_offset(skb2) + ip_hdrlen(skb2); | |
1404 | __skb_pull(skb2, offset); | |
1405 | skb_reset_transport_header(skb2); | |
1406 | ||
1407 | err = -EINVAL; | |
1408 | if (!pskb_may_pull(skb2, sizeof(*ih))) | |
1409 | goto out; | |
1410 | ||
eb1d1641 HX |
1411 | switch (skb2->ip_summed) { |
1412 | case CHECKSUM_COMPLETE: | |
1413 | if (!csum_fold(skb2->csum)) | |
1414 | break; | |
1415 | /* fall through */ | |
1416 | case CHECKSUM_NONE: | |
1417 | skb2->csum = 0; | |
1418 | if (skb_checksum_complete(skb2)) | |
8440853b | 1419 | goto out; |
eb1d1641 HX |
1420 | } |
1421 | ||
1422 | err = 0; | |
1423 | ||
1424 | BR_INPUT_SKB_CB(skb)->igmp = 1; | |
1425 | ih = igmp_hdr(skb2); | |
1426 | ||
1427 | switch (ih->type) { | |
1428 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
1429 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
62b2bcb4 | 1430 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
8ef2a9a5 | 1431 | err = br_ip4_multicast_add_group(br, port, ih->group); |
eb1d1641 HX |
1432 | break; |
1433 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
8ef2a9a5 | 1434 | err = br_ip4_multicast_igmp3_report(br, port, skb2); |
eb1d1641 HX |
1435 | break; |
1436 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
8ef2a9a5 | 1437 | err = br_ip4_multicast_query(br, port, skb2); |
eb1d1641 HX |
1438 | break; |
1439 | case IGMP_HOST_LEAVE_MESSAGE: | |
8ef2a9a5 | 1440 | br_ip4_multicast_leave_group(br, port, ih->group); |
eb1d1641 HX |
1441 | break; |
1442 | } | |
1443 | ||
1444 | out: | |
1445 | __skb_push(skb2, offset); | |
8440853b | 1446 | err_out: |
eb1d1641 HX |
1447 | if (skb2 != skb) |
1448 | kfree_skb(skb2); | |
1449 | return err; | |
1450 | } | |
1451 | ||
08b202b6 YH |
1452 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
1453 | static int br_multicast_ipv6_rcv(struct net_bridge *br, | |
1454 | struct net_bridge_port *port, | |
1455 | struct sk_buff *skb) | |
1456 | { | |
9d89081d | 1457 | struct sk_buff *skb2; |
b71d1d42 | 1458 | const struct ipv6hdr *ip6h; |
22df1331 | 1459 | u8 icmp6_type; |
08b202b6 YH |
1460 | u8 nexthdr; |
1461 | unsigned len; | |
bb7a0bd6 | 1462 | int offset; |
08b202b6 YH |
1463 | int err; |
1464 | ||
08b202b6 YH |
1465 | if (!pskb_may_pull(skb, sizeof(*ip6h))) |
1466 | return -EINVAL; | |
1467 | ||
1468 | ip6h = ipv6_hdr(skb); | |
1469 | ||
1470 | /* | |
1471 | * We're interested in MLD messages only. | |
1472 | * - Version is 6 | |
1473 | * - MLD has always Router Alert hop-by-hop option | |
1474 | * - But we do not support jumbrograms. | |
1475 | */ | |
1476 | if (ip6h->version != 6 || | |
1477 | ip6h->nexthdr != IPPROTO_HOPOPTS || | |
1478 | ip6h->payload_len == 0) | |
1479 | return 0; | |
1480 | ||
ff9a57a6 | 1481 | len = ntohs(ip6h->payload_len) + sizeof(*ip6h); |
08b202b6 YH |
1482 | if (skb->len < len) |
1483 | return -EINVAL; | |
1484 | ||
1485 | nexthdr = ip6h->nexthdr; | |
1486 | offset = ipv6_skip_exthdr(skb, sizeof(*ip6h), &nexthdr); | |
1487 | ||
1488 | if (offset < 0 || nexthdr != IPPROTO_ICMPV6) | |
1489 | return 0; | |
1490 | ||
1491 | /* Okay, we found ICMPv6 header */ | |
1492 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
1493 | if (!skb2) | |
1494 | return -ENOMEM; | |
1495 | ||
9d89081d TW |
1496 | err = -EINVAL; |
1497 | if (!pskb_may_pull(skb2, offset + sizeof(struct icmp6hdr))) | |
1498 | goto out; | |
1499 | ||
08b202b6 YH |
1500 | len -= offset - skb_network_offset(skb2); |
1501 | ||
1502 | __skb_pull(skb2, offset); | |
1503 | skb_reset_transport_header(skb2); | |
1504 | ||
22df1331 | 1505 | icmp6_type = icmp6_hdr(skb2)->icmp6_type; |
08b202b6 | 1506 | |
22df1331 | 1507 | switch (icmp6_type) { |
08b202b6 YH |
1508 | case ICMPV6_MGM_QUERY: |
1509 | case ICMPV6_MGM_REPORT: | |
1510 | case ICMPV6_MGM_REDUCTION: | |
1511 | case ICMPV6_MLD2_REPORT: | |
1512 | break; | |
1513 | default: | |
1514 | err = 0; | |
1515 | goto out; | |
1516 | } | |
1517 | ||
1518 | /* Okay, we found MLD message. Check further. */ | |
1519 | if (skb2->len > len) { | |
1520 | err = pskb_trim_rcsum(skb2, len); | |
1521 | if (err) | |
1522 | goto out; | |
4b275d7e | 1523 | err = -EINVAL; |
08b202b6 YH |
1524 | } |
1525 | ||
4b275d7e YZ |
1526 | ip6h = ipv6_hdr(skb2); |
1527 | ||
08b202b6 YH |
1528 | switch (skb2->ip_summed) { |
1529 | case CHECKSUM_COMPLETE: | |
4b275d7e YZ |
1530 | if (!csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, skb2->len, |
1531 | IPPROTO_ICMPV6, skb2->csum)) | |
08b202b6 YH |
1532 | break; |
1533 | /*FALLTHROUGH*/ | |
1534 | case CHECKSUM_NONE: | |
4b275d7e YZ |
1535 | skb2->csum = ~csum_unfold(csum_ipv6_magic(&ip6h->saddr, |
1536 | &ip6h->daddr, | |
1537 | skb2->len, | |
1538 | IPPROTO_ICMPV6, 0)); | |
1539 | if (__skb_checksum_complete(skb2)) | |
08b202b6 YH |
1540 | goto out; |
1541 | } | |
1542 | ||
1543 | err = 0; | |
1544 | ||
1545 | BR_INPUT_SKB_CB(skb)->igmp = 1; | |
1546 | ||
22df1331 | 1547 | switch (icmp6_type) { |
08b202b6 YH |
1548 | case ICMPV6_MGM_REPORT: |
1549 | { | |
9d89081d TW |
1550 | struct mld_msg *mld; |
1551 | if (!pskb_may_pull(skb2, sizeof(*mld))) { | |
1552 | err = -EINVAL; | |
1553 | goto out; | |
1554 | } | |
1555 | mld = (struct mld_msg *)skb_transport_header(skb2); | |
fc2af6c7 | 1556 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
08b202b6 YH |
1557 | err = br_ip6_multicast_add_group(br, port, &mld->mld_mca); |
1558 | break; | |
1559 | } | |
1560 | case ICMPV6_MLD2_REPORT: | |
1561 | err = br_ip6_multicast_mld2_report(br, port, skb2); | |
1562 | break; | |
1563 | case ICMPV6_MGM_QUERY: | |
1564 | err = br_ip6_multicast_query(br, port, skb2); | |
1565 | break; | |
1566 | case ICMPV6_MGM_REDUCTION: | |
1567 | { | |
9d89081d TW |
1568 | struct mld_msg *mld; |
1569 | if (!pskb_may_pull(skb2, sizeof(*mld))) { | |
1570 | err = -EINVAL; | |
1571 | goto out; | |
1572 | } | |
1573 | mld = (struct mld_msg *)skb_transport_header(skb2); | |
08b202b6 YH |
1574 | br_ip6_multicast_leave_group(br, port, &mld->mld_mca); |
1575 | } | |
1576 | } | |
1577 | ||
1578 | out: | |
9d89081d | 1579 | kfree_skb(skb2); |
08b202b6 YH |
1580 | return err; |
1581 | } | |
1582 | #endif | |
1583 | ||
eb1d1641 HX |
1584 | int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, |
1585 | struct sk_buff *skb) | |
1586 | { | |
1fafc7a9 YH |
1587 | BR_INPUT_SKB_CB(skb)->igmp = 0; |
1588 | BR_INPUT_SKB_CB(skb)->mrouters_only = 0; | |
1589 | ||
eb1d1641 HX |
1590 | if (br->multicast_disabled) |
1591 | return 0; | |
1592 | ||
1593 | switch (skb->protocol) { | |
1594 | case htons(ETH_P_IP): | |
1595 | return br_multicast_ipv4_rcv(br, port, skb); | |
08b202b6 YH |
1596 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
1597 | case htons(ETH_P_IPV6): | |
1598 | return br_multicast_ipv6_rcv(br, port, skb); | |
1599 | #endif | |
eb1d1641 HX |
1600 | } |
1601 | ||
1602 | return 0; | |
1603 | } | |
1604 | ||
1605 | static void br_multicast_query_expired(unsigned long data) | |
1606 | { | |
1607 | struct net_bridge *br = (void *)data; | |
1608 | ||
1609 | spin_lock(&br->multicast_lock); | |
1610 | if (br->multicast_startup_queries_sent < | |
1611 | br->multicast_startup_query_count) | |
1612 | br->multicast_startup_queries_sent++; | |
1613 | ||
1614 | br_multicast_send_query(br, NULL, br->multicast_startup_queries_sent); | |
1615 | ||
1616 | spin_unlock(&br->multicast_lock); | |
1617 | } | |
1618 | ||
1619 | void br_multicast_init(struct net_bridge *br) | |
1620 | { | |
1621 | br->hash_elasticity = 4; | |
1622 | br->hash_max = 512; | |
1623 | ||
1624 | br->multicast_router = 1; | |
1625 | br->multicast_last_member_count = 2; | |
1626 | br->multicast_startup_query_count = 2; | |
1627 | ||
1628 | br->multicast_last_member_interval = HZ; | |
1629 | br->multicast_query_response_interval = 10 * HZ; | |
1630 | br->multicast_startup_query_interval = 125 * HZ / 4; | |
1631 | br->multicast_query_interval = 125 * HZ; | |
1632 | br->multicast_querier_interval = 255 * HZ; | |
1633 | br->multicast_membership_interval = 260 * HZ; | |
1634 | ||
1635 | spin_lock_init(&br->multicast_lock); | |
1636 | setup_timer(&br->multicast_router_timer, | |
1637 | br_multicast_local_router_expired, 0); | |
1638 | setup_timer(&br->multicast_querier_timer, | |
1639 | br_multicast_local_router_expired, 0); | |
1640 | setup_timer(&br->multicast_query_timer, br_multicast_query_expired, | |
1641 | (unsigned long)br); | |
1642 | } | |
1643 | ||
1644 | void br_multicast_open(struct net_bridge *br) | |
1645 | { | |
1646 | br->multicast_startup_queries_sent = 0; | |
1647 | ||
1648 | if (br->multicast_disabled) | |
1649 | return; | |
1650 | ||
1651 | mod_timer(&br->multicast_query_timer, jiffies); | |
1652 | } | |
1653 | ||
1654 | void br_multicast_stop(struct net_bridge *br) | |
1655 | { | |
1656 | struct net_bridge_mdb_htable *mdb; | |
1657 | struct net_bridge_mdb_entry *mp; | |
1658 | struct hlist_node *p, *n; | |
1659 | u32 ver; | |
1660 | int i; | |
1661 | ||
1662 | del_timer_sync(&br->multicast_router_timer); | |
1663 | del_timer_sync(&br->multicast_querier_timer); | |
1664 | del_timer_sync(&br->multicast_query_timer); | |
1665 | ||
1666 | spin_lock_bh(&br->multicast_lock); | |
e8051688 | 1667 | mdb = mlock_dereference(br->mdb, br); |
eb1d1641 HX |
1668 | if (!mdb) |
1669 | goto out; | |
1670 | ||
1671 | br->mdb = NULL; | |
1672 | ||
1673 | ver = mdb->ver; | |
1674 | for (i = 0; i < mdb->max; i++) { | |
1675 | hlist_for_each_entry_safe(mp, p, n, &mdb->mhash[i], | |
1676 | hlist[ver]) { | |
1677 | del_timer(&mp->timer); | |
1678 | del_timer(&mp->query_timer); | |
1679 | call_rcu_bh(&mp->rcu, br_multicast_free_group); | |
1680 | } | |
1681 | } | |
1682 | ||
1683 | if (mdb->old) { | |
1684 | spin_unlock_bh(&br->multicast_lock); | |
10cc2b50 | 1685 | rcu_barrier_bh(); |
eb1d1641 HX |
1686 | spin_lock_bh(&br->multicast_lock); |
1687 | WARN_ON(mdb->old); | |
1688 | } | |
1689 | ||
1690 | mdb->old = mdb; | |
1691 | call_rcu_bh(&mdb->rcu, br_mdb_free); | |
1692 | ||
1693 | out: | |
1694 | spin_unlock_bh(&br->multicast_lock); | |
1695 | } | |
0909e117 HX |
1696 | |
1697 | int br_multicast_set_router(struct net_bridge *br, unsigned long val) | |
1698 | { | |
1699 | int err = -ENOENT; | |
1700 | ||
1701 | spin_lock_bh(&br->multicast_lock); | |
1702 | if (!netif_running(br->dev)) | |
1703 | goto unlock; | |
1704 | ||
1705 | switch (val) { | |
1706 | case 0: | |
1707 | case 2: | |
1708 | del_timer(&br->multicast_router_timer); | |
1709 | /* fall through */ | |
1710 | case 1: | |
1711 | br->multicast_router = val; | |
1712 | err = 0; | |
1713 | break; | |
1714 | ||
1715 | default: | |
1716 | err = -EINVAL; | |
1717 | break; | |
1718 | } | |
1719 | ||
1720 | unlock: | |
1721 | spin_unlock_bh(&br->multicast_lock); | |
1722 | ||
1723 | return err; | |
1724 | } | |
1725 | ||
1726 | int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val) | |
1727 | { | |
1728 | struct net_bridge *br = p->br; | |
1729 | int err = -ENOENT; | |
1730 | ||
1731 | spin_lock(&br->multicast_lock); | |
1732 | if (!netif_running(br->dev) || p->state == BR_STATE_DISABLED) | |
1733 | goto unlock; | |
1734 | ||
1735 | switch (val) { | |
1736 | case 0: | |
1737 | case 1: | |
1738 | case 2: | |
1739 | p->multicast_router = val; | |
1740 | err = 0; | |
1741 | ||
1742 | if (val < 2 && !hlist_unhashed(&p->rlist)) | |
1743 | hlist_del_init_rcu(&p->rlist); | |
1744 | ||
1745 | if (val == 1) | |
1746 | break; | |
1747 | ||
1748 | del_timer(&p->multicast_router_timer); | |
1749 | ||
1750 | if (val == 0) | |
1751 | break; | |
1752 | ||
1753 | br_multicast_add_router(br, p); | |
1754 | break; | |
1755 | ||
1756 | default: | |
1757 | err = -EINVAL; | |
1758 | break; | |
1759 | } | |
1760 | ||
1761 | unlock: | |
1762 | spin_unlock(&br->multicast_lock); | |
1763 | ||
1764 | return err; | |
1765 | } | |
561f1103 HX |
1766 | |
1767 | int br_multicast_toggle(struct net_bridge *br, unsigned long val) | |
1768 | { | |
1769 | struct net_bridge_port *port; | |
3a7fda06 | 1770 | int err = 0; |
e8051688 | 1771 | struct net_bridge_mdb_htable *mdb; |
561f1103 HX |
1772 | |
1773 | spin_lock(&br->multicast_lock); | |
561f1103 HX |
1774 | if (br->multicast_disabled == !val) |
1775 | goto unlock; | |
1776 | ||
1777 | br->multicast_disabled = !val; | |
1778 | if (br->multicast_disabled) | |
1779 | goto unlock; | |
1780 | ||
3a7fda06 HX |
1781 | if (!netif_running(br->dev)) |
1782 | goto unlock; | |
1783 | ||
e8051688 ED |
1784 | mdb = mlock_dereference(br->mdb, br); |
1785 | if (mdb) { | |
1786 | if (mdb->old) { | |
561f1103 HX |
1787 | err = -EEXIST; |
1788 | rollback: | |
1789 | br->multicast_disabled = !!val; | |
1790 | goto unlock; | |
1791 | } | |
1792 | ||
e8051688 | 1793 | err = br_mdb_rehash(&br->mdb, mdb->max, |
561f1103 HX |
1794 | br->hash_elasticity); |
1795 | if (err) | |
1796 | goto rollback; | |
1797 | } | |
1798 | ||
1799 | br_multicast_open(br); | |
1800 | list_for_each_entry(port, &br->port_list, list) { | |
1801 | if (port->state == BR_STATE_DISABLED || | |
1802 | port->state == BR_STATE_BLOCKING) | |
1803 | continue; | |
1804 | ||
1805 | __br_multicast_enable_port(port); | |
1806 | } | |
1807 | ||
1808 | unlock: | |
1809 | spin_unlock(&br->multicast_lock); | |
1810 | ||
1811 | return err; | |
1812 | } | |
b195167f HX |
1813 | |
1814 | int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val) | |
1815 | { | |
1816 | int err = -ENOENT; | |
1817 | u32 old; | |
e8051688 | 1818 | struct net_bridge_mdb_htable *mdb; |
b195167f HX |
1819 | |
1820 | spin_lock(&br->multicast_lock); | |
1821 | if (!netif_running(br->dev)) | |
1822 | goto unlock; | |
1823 | ||
1824 | err = -EINVAL; | |
1825 | if (!is_power_of_2(val)) | |
1826 | goto unlock; | |
e8051688 ED |
1827 | |
1828 | mdb = mlock_dereference(br->mdb, br); | |
1829 | if (mdb && val < mdb->size) | |
b195167f HX |
1830 | goto unlock; |
1831 | ||
1832 | err = 0; | |
1833 | ||
1834 | old = br->hash_max; | |
1835 | br->hash_max = val; | |
1836 | ||
e8051688 ED |
1837 | if (mdb) { |
1838 | if (mdb->old) { | |
b195167f HX |
1839 | err = -EEXIST; |
1840 | rollback: | |
1841 | br->hash_max = old; | |
1842 | goto unlock; | |
1843 | } | |
1844 | ||
1845 | err = br_mdb_rehash(&br->mdb, br->hash_max, | |
1846 | br->hash_elasticity); | |
1847 | if (err) | |
1848 | goto rollback; | |
1849 | } | |
1850 | ||
1851 | unlock: | |
1852 | spin_unlock(&br->multicast_lock); | |
1853 | ||
1854 | return err; | |
1855 | } |