Commit | Line | Data |
---|---|---|
eb1d1641 HX |
1 | /* |
2 | * Bridge multicast support. | |
3 | * | |
4 | * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/err.h> | |
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 | ||
08b202b6 YH |
36 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
37 | static inline int ipv6_is_local_multicast(const struct in6_addr *addr) | |
eb1d1641 | 38 | { |
08b202b6 YH |
39 | if (ipv6_addr_is_multicast(addr) && |
40 | IPV6_ADDR_MC_SCOPE(addr) <= IPV6_ADDR_SCOPE_LINKLOCAL) | |
41 | return 1; | |
42 | return 0; | |
43 | } | |
44 | #endif | |
45 | ||
8ef2a9a5 YH |
46 | static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b) |
47 | { | |
48 | if (a->proto != b->proto) | |
49 | return 0; | |
50 | switch (a->proto) { | |
51 | case htons(ETH_P_IP): | |
52 | return a->u.ip4 == b->u.ip4; | |
08b202b6 YH |
53 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
54 | case htons(ETH_P_IPV6): | |
55 | return ipv6_addr_equal(&a->u.ip6, &b->u.ip6); | |
56 | #endif | |
8ef2a9a5 YH |
57 | } |
58 | return 0; | |
59 | } | |
60 | ||
61 | static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip) | |
eb1d1641 | 62 | { |
0eae88f3 | 63 | return jhash_1word(mdb->secret, (__force u32)ip) & (mdb->max - 1); |
eb1d1641 HX |
64 | } |
65 | ||
08b202b6 YH |
66 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
67 | static inline int __br_ip6_hash(struct net_bridge_mdb_htable *mdb, | |
68 | const struct in6_addr *ip) | |
69 | { | |
70 | return jhash2((__force u32 *)ip->s6_addr32, 4, mdb->secret) & (mdb->max - 1); | |
71 | } | |
72 | #endif | |
73 | ||
8ef2a9a5 YH |
74 | static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb, |
75 | struct br_ip *ip) | |
76 | { | |
77 | switch (ip->proto) { | |
78 | case htons(ETH_P_IP): | |
79 | return __br_ip4_hash(mdb, ip->u.ip4); | |
08b202b6 YH |
80 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
81 | case htons(ETH_P_IPV6): | |
82 | return __br_ip6_hash(mdb, &ip->u.ip6); | |
83 | #endif | |
8ef2a9a5 YH |
84 | } |
85 | return 0; | |
eb1d1641 HX |
86 | } |
87 | ||
88 | static struct net_bridge_mdb_entry *__br_mdb_ip_get( | |
8ef2a9a5 | 89 | struct net_bridge_mdb_htable *mdb, struct br_ip *dst, int hash) |
eb1d1641 HX |
90 | { |
91 | struct net_bridge_mdb_entry *mp; | |
92 | struct hlist_node *p; | |
93 | ||
49f5fcfd | 94 | hlist_for_each_entry_rcu(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) { |
8ef2a9a5 | 95 | if (br_ip_equal(&mp->addr, dst)) |
eb1d1641 HX |
96 | return mp; |
97 | } | |
98 | ||
99 | return NULL; | |
100 | } | |
101 | ||
7f285fa7 HX |
102 | static struct net_bridge_mdb_entry *br_mdb_ip_get( |
103 | struct net_bridge_mdb_htable *mdb, struct br_ip *dst) | |
104 | { | |
105 | if (!mdb) | |
106 | return NULL; | |
107 | ||
108 | return __br_mdb_ip_get(mdb, dst, br_ip_hash(mdb, dst)); | |
109 | } | |
110 | ||
8ef2a9a5 | 111 | static struct net_bridge_mdb_entry *br_mdb_ip4_get( |
eb1d1641 HX |
112 | struct net_bridge_mdb_htable *mdb, __be32 dst) |
113 | { | |
8ef2a9a5 YH |
114 | struct br_ip br_dst; |
115 | ||
116 | br_dst.u.ip4 = dst; | |
117 | br_dst.proto = htons(ETH_P_IP); | |
0821ec55 | 118 | |
7f285fa7 | 119 | return br_mdb_ip_get(mdb, &br_dst); |
8ef2a9a5 YH |
120 | } |
121 | ||
08b202b6 YH |
122 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
123 | static struct net_bridge_mdb_entry *br_mdb_ip6_get( | |
124 | struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst) | |
125 | { | |
126 | struct br_ip br_dst; | |
0821ec55 | 127 | |
08b202b6 YH |
128 | ipv6_addr_copy(&br_dst.u.ip6, dst); |
129 | br_dst.proto = htons(ETH_P_IPV6); | |
130 | ||
7f285fa7 | 131 | return br_mdb_ip_get(mdb, &br_dst); |
08b202b6 YH |
132 | } |
133 | #endif | |
134 | ||
eb1d1641 HX |
135 | struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, |
136 | struct sk_buff *skb) | |
137 | { | |
8ef2a9a5 YH |
138 | struct net_bridge_mdb_htable *mdb = br->mdb; |
139 | struct br_ip ip; | |
140 | ||
7f285fa7 | 141 | if (br->multicast_disabled) |
eb1d1641 HX |
142 | return NULL; |
143 | ||
8ef2a9a5 | 144 | if (BR_INPUT_SKB_CB(skb)->igmp) |
eb1d1641 HX |
145 | return NULL; |
146 | ||
8ef2a9a5 YH |
147 | ip.proto = skb->protocol; |
148 | ||
eb1d1641 HX |
149 | switch (skb->protocol) { |
150 | case htons(ETH_P_IP): | |
8ef2a9a5 YH |
151 | ip.u.ip4 = ip_hdr(skb)->daddr; |
152 | break; | |
08b202b6 YH |
153 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
154 | case htons(ETH_P_IPV6): | |
155 | ipv6_addr_copy(&ip.u.ip6, &ipv6_hdr(skb)->daddr); | |
156 | break; | |
157 | #endif | |
8ef2a9a5 YH |
158 | default: |
159 | return NULL; | |
eb1d1641 HX |
160 | } |
161 | ||
8ef2a9a5 | 162 | return br_mdb_ip_get(mdb, &ip); |
eb1d1641 HX |
163 | } |
164 | ||
165 | static void br_mdb_free(struct rcu_head *head) | |
166 | { | |
167 | struct net_bridge_mdb_htable *mdb = | |
168 | container_of(head, struct net_bridge_mdb_htable, rcu); | |
169 | struct net_bridge_mdb_htable *old = mdb->old; | |
170 | ||
171 | mdb->old = NULL; | |
172 | kfree(old->mhash); | |
173 | kfree(old); | |
174 | } | |
175 | ||
176 | static int br_mdb_copy(struct net_bridge_mdb_htable *new, | |
177 | struct net_bridge_mdb_htable *old, | |
178 | int elasticity) | |
179 | { | |
180 | struct net_bridge_mdb_entry *mp; | |
181 | struct hlist_node *p; | |
182 | int maxlen; | |
183 | int len; | |
184 | int i; | |
185 | ||
186 | for (i = 0; i < old->max; i++) | |
187 | hlist_for_each_entry(mp, p, &old->mhash[i], hlist[old->ver]) | |
188 | hlist_add_head(&mp->hlist[new->ver], | |
8ef2a9a5 | 189 | &new->mhash[br_ip_hash(new, &mp->addr)]); |
eb1d1641 HX |
190 | |
191 | if (!elasticity) | |
192 | return 0; | |
193 | ||
194 | maxlen = 0; | |
195 | for (i = 0; i < new->max; i++) { | |
196 | len = 0; | |
197 | hlist_for_each_entry(mp, p, &new->mhash[i], hlist[new->ver]) | |
198 | len++; | |
199 | if (len > maxlen) | |
200 | maxlen = len; | |
201 | } | |
202 | ||
203 | return maxlen > elasticity ? -EINVAL : 0; | |
204 | } | |
205 | ||
206 | static void br_multicast_free_pg(struct rcu_head *head) | |
207 | { | |
208 | struct net_bridge_port_group *p = | |
209 | container_of(head, struct net_bridge_port_group, rcu); | |
210 | ||
211 | kfree(p); | |
212 | } | |
213 | ||
214 | static void br_multicast_free_group(struct rcu_head *head) | |
215 | { | |
216 | struct net_bridge_mdb_entry *mp = | |
217 | container_of(head, struct net_bridge_mdb_entry, rcu); | |
218 | ||
219 | kfree(mp); | |
220 | } | |
221 | ||
222 | static void br_multicast_group_expired(unsigned long data) | |
223 | { | |
224 | struct net_bridge_mdb_entry *mp = (void *)data; | |
225 | struct net_bridge *br = mp->br; | |
226 | struct net_bridge_mdb_htable *mdb; | |
227 | ||
228 | spin_lock(&br->multicast_lock); | |
229 | if (!netif_running(br->dev) || timer_pending(&mp->timer)) | |
230 | goto out; | |
231 | ||
232 | if (!hlist_unhashed(&mp->mglist)) | |
233 | hlist_del_init(&mp->mglist); | |
234 | ||
235 | if (mp->ports) | |
236 | goto out; | |
237 | ||
238 | mdb = br->mdb; | |
239 | hlist_del_rcu(&mp->hlist[mdb->ver]); | |
240 | mdb->size--; | |
241 | ||
242 | del_timer(&mp->query_timer); | |
243 | call_rcu_bh(&mp->rcu, br_multicast_free_group); | |
244 | ||
245 | out: | |
246 | spin_unlock(&br->multicast_lock); | |
247 | } | |
248 | ||
249 | static void br_multicast_del_pg(struct net_bridge *br, | |
250 | struct net_bridge_port_group *pg) | |
251 | { | |
252 | struct net_bridge_mdb_htable *mdb = br->mdb; | |
253 | struct net_bridge_mdb_entry *mp; | |
254 | struct net_bridge_port_group *p; | |
255 | struct net_bridge_port_group **pp; | |
256 | ||
8ef2a9a5 | 257 | mp = br_mdb_ip_get(mdb, &pg->addr); |
eb1d1641 HX |
258 | if (WARN_ON(!mp)) |
259 | return; | |
260 | ||
261 | for (pp = &mp->ports; (p = *pp); pp = &p->next) { | |
262 | if (p != pg) | |
263 | continue; | |
264 | ||
83f6a740 | 265 | rcu_assign_pointer(*pp, p->next); |
eb1d1641 HX |
266 | hlist_del_init(&p->mglist); |
267 | del_timer(&p->timer); | |
268 | del_timer(&p->query_timer); | |
269 | call_rcu_bh(&p->rcu, br_multicast_free_pg); | |
270 | ||
271 | if (!mp->ports && hlist_unhashed(&mp->mglist) && | |
272 | netif_running(br->dev)) | |
273 | mod_timer(&mp->timer, jiffies); | |
274 | ||
275 | return; | |
276 | } | |
277 | ||
278 | WARN_ON(1); | |
279 | } | |
280 | ||
281 | static void br_multicast_port_group_expired(unsigned long data) | |
282 | { | |
283 | struct net_bridge_port_group *pg = (void *)data; | |
284 | struct net_bridge *br = pg->port->br; | |
285 | ||
286 | spin_lock(&br->multicast_lock); | |
287 | if (!netif_running(br->dev) || timer_pending(&pg->timer) || | |
288 | hlist_unhashed(&pg->mglist)) | |
289 | goto out; | |
290 | ||
291 | br_multicast_del_pg(br, pg); | |
292 | ||
293 | out: | |
294 | spin_unlock(&br->multicast_lock); | |
295 | } | |
296 | ||
297 | static int br_mdb_rehash(struct net_bridge_mdb_htable **mdbp, int max, | |
298 | int elasticity) | |
299 | { | |
300 | struct net_bridge_mdb_htable *old = *mdbp; | |
301 | struct net_bridge_mdb_htable *mdb; | |
302 | int err; | |
303 | ||
304 | mdb = kmalloc(sizeof(*mdb), GFP_ATOMIC); | |
305 | if (!mdb) | |
306 | return -ENOMEM; | |
307 | ||
308 | mdb->max = max; | |
309 | mdb->old = old; | |
310 | ||
311 | mdb->mhash = kzalloc(max * sizeof(*mdb->mhash), GFP_ATOMIC); | |
312 | if (!mdb->mhash) { | |
313 | kfree(mdb); | |
314 | return -ENOMEM; | |
315 | } | |
316 | ||
317 | mdb->size = old ? old->size : 0; | |
318 | mdb->ver = old ? old->ver ^ 1 : 0; | |
319 | ||
320 | if (!old || elasticity) | |
321 | get_random_bytes(&mdb->secret, sizeof(mdb->secret)); | |
322 | else | |
323 | mdb->secret = old->secret; | |
324 | ||
325 | if (!old) | |
326 | goto out; | |
327 | ||
328 | err = br_mdb_copy(mdb, old, elasticity); | |
329 | if (err) { | |
330 | kfree(mdb->mhash); | |
331 | kfree(mdb); | |
332 | return err; | |
333 | } | |
334 | ||
335 | call_rcu_bh(&mdb->rcu, br_mdb_free); | |
336 | ||
337 | out: | |
338 | rcu_assign_pointer(*mdbp, mdb); | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
8ef2a9a5 YH |
343 | static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br, |
344 | __be32 group) | |
eb1d1641 HX |
345 | { |
346 | struct sk_buff *skb; | |
347 | struct igmphdr *ih; | |
348 | struct ethhdr *eth; | |
349 | struct iphdr *iph; | |
350 | ||
351 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) + | |
352 | sizeof(*ih) + 4); | |
353 | if (!skb) | |
354 | goto out; | |
355 | ||
356 | skb->protocol = htons(ETH_P_IP); | |
357 | ||
358 | skb_reset_mac_header(skb); | |
359 | eth = eth_hdr(skb); | |
360 | ||
361 | memcpy(eth->h_source, br->dev->dev_addr, 6); | |
362 | eth->h_dest[0] = 1; | |
363 | eth->h_dest[1] = 0; | |
364 | eth->h_dest[2] = 0x5e; | |
365 | eth->h_dest[3] = 0; | |
366 | eth->h_dest[4] = 0; | |
367 | eth->h_dest[5] = 1; | |
368 | eth->h_proto = htons(ETH_P_IP); | |
369 | skb_put(skb, sizeof(*eth)); | |
370 | ||
371 | skb_set_network_header(skb, skb->len); | |
372 | iph = ip_hdr(skb); | |
373 | ||
374 | iph->version = 4; | |
375 | iph->ihl = 6; | |
376 | iph->tos = 0xc0; | |
377 | iph->tot_len = htons(sizeof(*iph) + sizeof(*ih) + 4); | |
378 | iph->id = 0; | |
379 | iph->frag_off = htons(IP_DF); | |
380 | iph->ttl = 1; | |
381 | iph->protocol = IPPROTO_IGMP; | |
382 | iph->saddr = 0; | |
383 | iph->daddr = htonl(INADDR_ALLHOSTS_GROUP); | |
384 | ((u8 *)&iph[1])[0] = IPOPT_RA; | |
385 | ((u8 *)&iph[1])[1] = 4; | |
386 | ((u8 *)&iph[1])[2] = 0; | |
387 | ((u8 *)&iph[1])[3] = 0; | |
388 | ip_send_check(iph); | |
389 | skb_put(skb, 24); | |
390 | ||
391 | skb_set_transport_header(skb, skb->len); | |
392 | ih = igmp_hdr(skb); | |
393 | ih->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
394 | ih->code = (group ? br->multicast_last_member_interval : | |
395 | br->multicast_query_response_interval) / | |
396 | (HZ / IGMP_TIMER_SCALE); | |
397 | ih->group = group; | |
398 | ih->csum = 0; | |
399 | ih->csum = ip_compute_csum((void *)ih, sizeof(struct igmphdr)); | |
400 | skb_put(skb, sizeof(*ih)); | |
401 | ||
402 | __skb_pull(skb, sizeof(*eth)); | |
403 | ||
404 | out: | |
405 | return skb; | |
406 | } | |
407 | ||
08b202b6 YH |
408 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
409 | static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, | |
410 | struct in6_addr *group) | |
411 | { | |
412 | struct sk_buff *skb; | |
413 | struct ipv6hdr *ip6h; | |
414 | struct mld_msg *mldq; | |
415 | struct ethhdr *eth; | |
416 | u8 *hopopt; | |
417 | unsigned long interval; | |
418 | ||
419 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) + | |
420 | 8 + sizeof(*mldq)); | |
421 | if (!skb) | |
422 | goto out; | |
423 | ||
424 | skb->protocol = htons(ETH_P_IPV6); | |
425 | ||
426 | /* Ethernet header */ | |
427 | skb_reset_mac_header(skb); | |
428 | eth = eth_hdr(skb); | |
429 | ||
430 | memcpy(eth->h_source, br->dev->dev_addr, 6); | |
431 | ipv6_eth_mc_map(group, eth->h_dest); | |
432 | eth->h_proto = htons(ETH_P_IPV6); | |
433 | skb_put(skb, sizeof(*eth)); | |
434 | ||
435 | /* IPv6 header + HbH option */ | |
436 | skb_set_network_header(skb, skb->len); | |
437 | ip6h = ipv6_hdr(skb); | |
438 | ||
439 | *(__force __be32 *)ip6h = htonl(0x60000000); | |
440 | ip6h->payload_len = 8 + sizeof(*mldq); | |
441 | ip6h->nexthdr = IPPROTO_HOPOPTS; | |
442 | ip6h->hop_limit = 1; | |
443 | ipv6_addr_set(&ip6h->saddr, 0, 0, 0, 0); | |
444 | ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1)); | |
445 | ||
446 | hopopt = (u8 *)(ip6h + 1); | |
447 | hopopt[0] = IPPROTO_ICMPV6; /* next hdr */ | |
448 | hopopt[1] = 0; /* length of HbH */ | |
449 | hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */ | |
450 | hopopt[3] = 2; /* Length of RA Option */ | |
451 | hopopt[4] = 0; /* Type = 0x0000 (MLD) */ | |
452 | hopopt[5] = 0; | |
453 | hopopt[6] = IPV6_TLV_PAD0; /* Pad0 */ | |
454 | hopopt[7] = IPV6_TLV_PAD0; /* Pad0 */ | |
455 | ||
456 | skb_put(skb, sizeof(*ip6h) + 8); | |
457 | ||
458 | /* ICMPv6 */ | |
459 | skb_set_transport_header(skb, skb->len); | |
460 | mldq = (struct mld_msg *) icmp6_hdr(skb); | |
461 | ||
462 | interval = ipv6_addr_any(group) ? br->multicast_last_member_interval : | |
463 | br->multicast_query_response_interval; | |
464 | ||
465 | mldq->mld_type = ICMPV6_MGM_QUERY; | |
466 | mldq->mld_code = 0; | |
467 | mldq->mld_cksum = 0; | |
468 | mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval)); | |
469 | mldq->mld_reserved = 0; | |
470 | ipv6_addr_copy(&mldq->mld_mca, group); | |
471 | ||
472 | /* checksum */ | |
473 | mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
474 | sizeof(*mldq), IPPROTO_ICMPV6, | |
475 | csum_partial(mldq, | |
476 | sizeof(*mldq), 0)); | |
477 | skb_put(skb, sizeof(*mldq)); | |
478 | ||
479 | __skb_pull(skb, sizeof(*eth)); | |
480 | ||
481 | out: | |
482 | return skb; | |
483 | } | |
484 | #endif | |
485 | ||
8ef2a9a5 YH |
486 | static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br, |
487 | struct br_ip *addr) | |
488 | { | |
489 | switch (addr->proto) { | |
490 | case htons(ETH_P_IP): | |
491 | return br_ip4_multicast_alloc_query(br, addr->u.ip4); | |
08b202b6 YH |
492 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
493 | case htons(ETH_P_IPV6): | |
494 | return br_ip6_multicast_alloc_query(br, &addr->u.ip6); | |
495 | #endif | |
8ef2a9a5 YH |
496 | } |
497 | return NULL; | |
498 | } | |
499 | ||
eb1d1641 HX |
500 | static void br_multicast_send_group_query(struct net_bridge_mdb_entry *mp) |
501 | { | |
502 | struct net_bridge *br = mp->br; | |
503 | struct sk_buff *skb; | |
504 | ||
8ef2a9a5 | 505 | skb = br_multicast_alloc_query(br, &mp->addr); |
eb1d1641 HX |
506 | if (!skb) |
507 | goto timer; | |
508 | ||
509 | netif_rx(skb); | |
510 | ||
511 | timer: | |
512 | if (++mp->queries_sent < br->multicast_last_member_count) | |
513 | mod_timer(&mp->query_timer, | |
514 | jiffies + br->multicast_last_member_interval); | |
515 | } | |
516 | ||
517 | static void br_multicast_group_query_expired(unsigned long data) | |
518 | { | |
519 | struct net_bridge_mdb_entry *mp = (void *)data; | |
520 | struct net_bridge *br = mp->br; | |
521 | ||
522 | spin_lock(&br->multicast_lock); | |
523 | if (!netif_running(br->dev) || hlist_unhashed(&mp->mglist) || | |
524 | mp->queries_sent >= br->multicast_last_member_count) | |
525 | goto out; | |
526 | ||
527 | br_multicast_send_group_query(mp); | |
528 | ||
529 | out: | |
530 | spin_unlock(&br->multicast_lock); | |
531 | } | |
532 | ||
533 | static void br_multicast_send_port_group_query(struct net_bridge_port_group *pg) | |
534 | { | |
535 | struct net_bridge_port *port = pg->port; | |
536 | struct net_bridge *br = port->br; | |
537 | struct sk_buff *skb; | |
538 | ||
8ef2a9a5 | 539 | skb = br_multicast_alloc_query(br, &pg->addr); |
eb1d1641 HX |
540 | if (!skb) |
541 | goto timer; | |
542 | ||
543 | br_deliver(port, skb); | |
544 | ||
545 | timer: | |
546 | if (++pg->queries_sent < br->multicast_last_member_count) | |
547 | mod_timer(&pg->query_timer, | |
548 | jiffies + br->multicast_last_member_interval); | |
549 | } | |
550 | ||
551 | static void br_multicast_port_group_query_expired(unsigned long data) | |
552 | { | |
553 | struct net_bridge_port_group *pg = (void *)data; | |
554 | struct net_bridge_port *port = pg->port; | |
555 | struct net_bridge *br = port->br; | |
556 | ||
557 | spin_lock(&br->multicast_lock); | |
558 | if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) || | |
559 | pg->queries_sent >= br->multicast_last_member_count) | |
560 | goto out; | |
561 | ||
562 | br_multicast_send_port_group_query(pg); | |
563 | ||
564 | out: | |
565 | spin_unlock(&br->multicast_lock); | |
566 | } | |
567 | ||
568 | static struct net_bridge_mdb_entry *br_multicast_get_group( | |
8ef2a9a5 YH |
569 | struct net_bridge *br, struct net_bridge_port *port, |
570 | struct br_ip *group, int hash) | |
eb1d1641 HX |
571 | { |
572 | struct net_bridge_mdb_htable *mdb = br->mdb; | |
573 | struct net_bridge_mdb_entry *mp; | |
574 | struct hlist_node *p; | |
575 | unsigned count = 0; | |
576 | unsigned max; | |
577 | int elasticity; | |
578 | int err; | |
579 | ||
580 | hlist_for_each_entry(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) { | |
581 | count++; | |
8ef2a9a5 | 582 | if (unlikely(br_ip_equal(group, &mp->addr))) |
eb1d1641 | 583 | return mp; |
eb1d1641 HX |
584 | } |
585 | ||
586 | elasticity = 0; | |
587 | max = mdb->max; | |
588 | ||
589 | if (unlikely(count > br->hash_elasticity && count)) { | |
590 | if (net_ratelimit()) | |
28a16c97 | 591 | br_info(br, "Multicast hash table " |
592 | "chain limit reached: %s\n", | |
593 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
594 | |
595 | elasticity = br->hash_elasticity; | |
596 | } | |
597 | ||
598 | if (mdb->size >= max) { | |
599 | max *= 2; | |
600 | if (unlikely(max >= br->hash_max)) { | |
28a16c97 | 601 | br_warn(br, "Multicast hash table maximum " |
602 | "reached, disabling snooping: %s, %d\n", | |
603 | port ? port->dev->name : br->dev->name, max); | |
eb1d1641 HX |
604 | err = -E2BIG; |
605 | disable: | |
606 | br->multicast_disabled = 1; | |
607 | goto err; | |
608 | } | |
609 | } | |
610 | ||
611 | if (max > mdb->max || elasticity) { | |
612 | if (mdb->old) { | |
613 | if (net_ratelimit()) | |
28a16c97 | 614 | br_info(br, "Multicast hash table " |
615 | "on fire: %s\n", | |
616 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
617 | err = -EEXIST; |
618 | goto err; | |
619 | } | |
620 | ||
621 | err = br_mdb_rehash(&br->mdb, max, elasticity); | |
622 | if (err) { | |
28a16c97 | 623 | br_warn(br, "Cannot rehash multicast " |
624 | "hash table, disabling snooping: %s, %d, %d\n", | |
625 | port ? port->dev->name : br->dev->name, | |
626 | mdb->size, err); | |
eb1d1641 HX |
627 | goto disable; |
628 | } | |
629 | ||
630 | err = -EAGAIN; | |
631 | goto err; | |
632 | } | |
633 | ||
634 | return NULL; | |
635 | ||
636 | err: | |
637 | mp = ERR_PTR(err); | |
638 | return mp; | |
639 | } | |
640 | ||
641 | static struct net_bridge_mdb_entry *br_multicast_new_group( | |
8ef2a9a5 YH |
642 | struct net_bridge *br, struct net_bridge_port *port, |
643 | struct br_ip *group) | |
eb1d1641 HX |
644 | { |
645 | struct net_bridge_mdb_htable *mdb = br->mdb; | |
646 | struct net_bridge_mdb_entry *mp; | |
647 | int hash; | |
648 | ||
649 | if (!mdb) { | |
650 | if (br_mdb_rehash(&br->mdb, BR_HASH_SIZE, 0)) | |
651 | return NULL; | |
652 | goto rehash; | |
653 | } | |
654 | ||
655 | hash = br_ip_hash(mdb, group); | |
656 | mp = br_multicast_get_group(br, port, group, hash); | |
657 | switch (PTR_ERR(mp)) { | |
658 | case 0: | |
659 | break; | |
660 | ||
661 | case -EAGAIN: | |
662 | rehash: | |
663 | mdb = br->mdb; | |
664 | hash = br_ip_hash(mdb, group); | |
665 | break; | |
666 | ||
667 | default: | |
668 | goto out; | |
669 | } | |
670 | ||
671 | mp = kzalloc(sizeof(*mp), GFP_ATOMIC); | |
672 | if (unlikely(!mp)) | |
673 | goto out; | |
674 | ||
675 | mp->br = br; | |
8ef2a9a5 | 676 | mp->addr = *group; |
eb1d1641 HX |
677 | setup_timer(&mp->timer, br_multicast_group_expired, |
678 | (unsigned long)mp); | |
679 | setup_timer(&mp->query_timer, br_multicast_group_query_expired, | |
680 | (unsigned long)mp); | |
681 | ||
682 | hlist_add_head_rcu(&mp->hlist[mdb->ver], &mdb->mhash[hash]); | |
683 | mdb->size++; | |
684 | ||
685 | out: | |
686 | return mp; | |
687 | } | |
688 | ||
689 | static int br_multicast_add_group(struct net_bridge *br, | |
8ef2a9a5 YH |
690 | struct net_bridge_port *port, |
691 | struct br_ip *group) | |
eb1d1641 HX |
692 | { |
693 | struct net_bridge_mdb_entry *mp; | |
694 | struct net_bridge_port_group *p; | |
695 | struct net_bridge_port_group **pp; | |
696 | unsigned long now = jiffies; | |
697 | int err; | |
698 | ||
eb1d1641 HX |
699 | spin_lock(&br->multicast_lock); |
700 | if (!netif_running(br->dev) || | |
701 | (port && port->state == BR_STATE_DISABLED)) | |
702 | goto out; | |
703 | ||
704 | mp = br_multicast_new_group(br, port, group); | |
705 | err = PTR_ERR(mp); | |
706 | if (unlikely(IS_ERR(mp) || !mp)) | |
707 | goto err; | |
708 | ||
709 | if (!port) { | |
710 | hlist_add_head(&mp->mglist, &br->mglist); | |
711 | mod_timer(&mp->timer, now + br->multicast_membership_interval); | |
712 | goto out; | |
713 | } | |
714 | ||
715 | for (pp = &mp->ports; (p = *pp); pp = &p->next) { | |
716 | if (p->port == port) | |
717 | goto found; | |
718 | if ((unsigned long)p->port < (unsigned long)port) | |
719 | break; | |
720 | } | |
721 | ||
722 | p = kzalloc(sizeof(*p), GFP_ATOMIC); | |
723 | err = -ENOMEM; | |
724 | if (unlikely(!p)) | |
725 | goto err; | |
726 | ||
8ef2a9a5 | 727 | p->addr = *group; |
eb1d1641 HX |
728 | p->port = port; |
729 | p->next = *pp; | |
730 | hlist_add_head(&p->mglist, &port->mglist); | |
731 | setup_timer(&p->timer, br_multicast_port_group_expired, | |
732 | (unsigned long)p); | |
733 | setup_timer(&p->query_timer, br_multicast_port_group_query_expired, | |
734 | (unsigned long)p); | |
735 | ||
736 | rcu_assign_pointer(*pp, p); | |
737 | ||
738 | found: | |
739 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
740 | out: | |
741 | err = 0; | |
742 | ||
743 | err: | |
744 | spin_unlock(&br->multicast_lock); | |
745 | return err; | |
746 | } | |
747 | ||
8ef2a9a5 YH |
748 | static int br_ip4_multicast_add_group(struct net_bridge *br, |
749 | struct net_bridge_port *port, | |
750 | __be32 group) | |
751 | { | |
752 | struct br_ip br_group; | |
753 | ||
754 | if (ipv4_is_local_multicast(group)) | |
755 | return 0; | |
756 | ||
757 | br_group.u.ip4 = group; | |
758 | br_group.proto = htons(ETH_P_IP); | |
759 | ||
760 | return br_multicast_add_group(br, port, &br_group); | |
761 | } | |
762 | ||
08b202b6 YH |
763 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
764 | static int br_ip6_multicast_add_group(struct net_bridge *br, | |
765 | struct net_bridge_port *port, | |
766 | const struct in6_addr *group) | |
767 | { | |
768 | struct br_ip br_group; | |
769 | ||
770 | if (ipv6_is_local_multicast(group)) | |
771 | return 0; | |
772 | ||
773 | ipv6_addr_copy(&br_group.u.ip6, group); | |
774 | br_group.proto = htons(ETH_P_IP); | |
775 | ||
776 | return br_multicast_add_group(br, port, &br_group); | |
777 | } | |
778 | #endif | |
779 | ||
eb1d1641 HX |
780 | static void br_multicast_router_expired(unsigned long data) |
781 | { | |
782 | struct net_bridge_port *port = (void *)data; | |
783 | struct net_bridge *br = port->br; | |
784 | ||
785 | spin_lock(&br->multicast_lock); | |
786 | if (port->multicast_router != 1 || | |
787 | timer_pending(&port->multicast_router_timer) || | |
788 | hlist_unhashed(&port->rlist)) | |
789 | goto out; | |
790 | ||
791 | hlist_del_init_rcu(&port->rlist); | |
792 | ||
793 | out: | |
794 | spin_unlock(&br->multicast_lock); | |
795 | } | |
796 | ||
797 | static void br_multicast_local_router_expired(unsigned long data) | |
798 | { | |
799 | } | |
800 | ||
8ef2a9a5 YH |
801 | static void __br_multicast_send_query(struct net_bridge *br, |
802 | struct net_bridge_port *port, | |
803 | struct br_ip *ip) | |
eb1d1641 | 804 | { |
eb1d1641 HX |
805 | struct sk_buff *skb; |
806 | ||
8ef2a9a5 | 807 | skb = br_multicast_alloc_query(br, ip); |
eb1d1641 | 808 | if (!skb) |
8ef2a9a5 | 809 | return; |
eb1d1641 HX |
810 | |
811 | if (port) { | |
812 | __skb_push(skb, sizeof(struct ethhdr)); | |
813 | skb->dev = port->dev; | |
713aefa3 | 814 | NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev, |
eb1d1641 HX |
815 | dev_queue_xmit); |
816 | } else | |
817 | netif_rx(skb); | |
8ef2a9a5 YH |
818 | } |
819 | ||
820 | static void br_multicast_send_query(struct net_bridge *br, | |
821 | struct net_bridge_port *port, u32 sent) | |
822 | { | |
823 | unsigned long time; | |
824 | struct br_ip br_group; | |
825 | ||
826 | if (!netif_running(br->dev) || br->multicast_disabled || | |
827 | timer_pending(&br->multicast_querier_timer)) | |
828 | return; | |
829 | ||
08b202b6 YH |
830 | memset(&br_group.u, 0, sizeof(br_group.u)); |
831 | ||
8ef2a9a5 | 832 | br_group.proto = htons(ETH_P_IP); |
08b202b6 | 833 | __br_multicast_send_query(br, port, &br_group); |
8ef2a9a5 | 834 | |
08b202b6 YH |
835 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
836 | br_group.proto = htons(ETH_P_IPV6); | |
8ef2a9a5 | 837 | __br_multicast_send_query(br, port, &br_group); |
08b202b6 | 838 | #endif |
eb1d1641 | 839 | |
eb1d1641 HX |
840 | time = jiffies; |
841 | time += sent < br->multicast_startup_query_count ? | |
842 | br->multicast_startup_query_interval : | |
843 | br->multicast_query_interval; | |
844 | mod_timer(port ? &port->multicast_query_timer : | |
845 | &br->multicast_query_timer, time); | |
846 | } | |
847 | ||
848 | static void br_multicast_port_query_expired(unsigned long data) | |
849 | { | |
850 | struct net_bridge_port *port = (void *)data; | |
851 | struct net_bridge *br = port->br; | |
852 | ||
853 | spin_lock(&br->multicast_lock); | |
02a780c0 DC |
854 | if (port->state == BR_STATE_DISABLED || |
855 | port->state == BR_STATE_BLOCKING) | |
eb1d1641 HX |
856 | goto out; |
857 | ||
858 | if (port->multicast_startup_queries_sent < | |
859 | br->multicast_startup_query_count) | |
860 | port->multicast_startup_queries_sent++; | |
861 | ||
862 | br_multicast_send_query(port->br, port, | |
863 | port->multicast_startup_queries_sent); | |
864 | ||
865 | out: | |
866 | spin_unlock(&br->multicast_lock); | |
867 | } | |
868 | ||
869 | void br_multicast_add_port(struct net_bridge_port *port) | |
870 | { | |
871 | port->multicast_router = 1; | |
872 | ||
873 | setup_timer(&port->multicast_router_timer, br_multicast_router_expired, | |
874 | (unsigned long)port); | |
875 | setup_timer(&port->multicast_query_timer, | |
876 | br_multicast_port_query_expired, (unsigned long)port); | |
877 | } | |
878 | ||
879 | void br_multicast_del_port(struct net_bridge_port *port) | |
880 | { | |
881 | del_timer_sync(&port->multicast_router_timer); | |
882 | } | |
883 | ||
561f1103 HX |
884 | static void __br_multicast_enable_port(struct net_bridge_port *port) |
885 | { | |
886 | port->multicast_startup_queries_sent = 0; | |
887 | ||
888 | if (try_to_del_timer_sync(&port->multicast_query_timer) >= 0 || | |
889 | del_timer(&port->multicast_query_timer)) | |
890 | mod_timer(&port->multicast_query_timer, jiffies); | |
891 | } | |
892 | ||
eb1d1641 HX |
893 | void br_multicast_enable_port(struct net_bridge_port *port) |
894 | { | |
895 | struct net_bridge *br = port->br; | |
896 | ||
897 | spin_lock(&br->multicast_lock); | |
898 | if (br->multicast_disabled || !netif_running(br->dev)) | |
899 | goto out; | |
900 | ||
561f1103 | 901 | __br_multicast_enable_port(port); |
eb1d1641 HX |
902 | |
903 | out: | |
904 | spin_unlock(&br->multicast_lock); | |
905 | } | |
906 | ||
907 | void br_multicast_disable_port(struct net_bridge_port *port) | |
908 | { | |
909 | struct net_bridge *br = port->br; | |
910 | struct net_bridge_port_group *pg; | |
911 | struct hlist_node *p, *n; | |
912 | ||
913 | spin_lock(&br->multicast_lock); | |
914 | hlist_for_each_entry_safe(pg, p, n, &port->mglist, mglist) | |
915 | br_multicast_del_pg(br, pg); | |
916 | ||
917 | if (!hlist_unhashed(&port->rlist)) | |
918 | hlist_del_init_rcu(&port->rlist); | |
919 | del_timer(&port->multicast_router_timer); | |
920 | del_timer(&port->multicast_query_timer); | |
921 | spin_unlock(&br->multicast_lock); | |
922 | } | |
923 | ||
8ef2a9a5 YH |
924 | static int br_ip4_multicast_igmp3_report(struct net_bridge *br, |
925 | struct net_bridge_port *port, | |
926 | struct sk_buff *skb) | |
eb1d1641 HX |
927 | { |
928 | struct igmpv3_report *ih; | |
929 | struct igmpv3_grec *grec; | |
930 | int i; | |
931 | int len; | |
932 | int num; | |
933 | int type; | |
934 | int err = 0; | |
935 | __be32 group; | |
936 | ||
937 | if (!pskb_may_pull(skb, sizeof(*ih))) | |
938 | return -EINVAL; | |
939 | ||
940 | ih = igmpv3_report_hdr(skb); | |
941 | num = ntohs(ih->ngrec); | |
942 | len = sizeof(*ih); | |
943 | ||
944 | for (i = 0; i < num; i++) { | |
945 | len += sizeof(*grec); | |
946 | if (!pskb_may_pull(skb, len)) | |
947 | return -EINVAL; | |
948 | ||
fd218cf9 | 949 | grec = (void *)(skb->data + len - sizeof(*grec)); |
eb1d1641 HX |
950 | group = grec->grec_mca; |
951 | type = grec->grec_type; | |
952 | ||
8eabf95c | 953 | len += ntohs(grec->grec_nsrcs) * 4; |
eb1d1641 HX |
954 | if (!pskb_may_pull(skb, len)) |
955 | return -EINVAL; | |
956 | ||
957 | /* We treat this as an IGMPv2 report for now. */ | |
958 | switch (type) { | |
959 | case IGMPV3_MODE_IS_INCLUDE: | |
960 | case IGMPV3_MODE_IS_EXCLUDE: | |
961 | case IGMPV3_CHANGE_TO_INCLUDE: | |
962 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
963 | case IGMPV3_ALLOW_NEW_SOURCES: | |
964 | case IGMPV3_BLOCK_OLD_SOURCES: | |
965 | break; | |
966 | ||
967 | default: | |
968 | continue; | |
969 | } | |
970 | ||
8ef2a9a5 | 971 | err = br_ip4_multicast_add_group(br, port, group); |
eb1d1641 HX |
972 | if (err) |
973 | break; | |
974 | } | |
975 | ||
976 | return err; | |
977 | } | |
978 | ||
08b202b6 YH |
979 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
980 | static int br_ip6_multicast_mld2_report(struct net_bridge *br, | |
981 | struct net_bridge_port *port, | |
982 | struct sk_buff *skb) | |
983 | { | |
984 | struct icmp6hdr *icmp6h; | |
985 | struct mld2_grec *grec; | |
986 | int i; | |
987 | int len; | |
988 | int num; | |
989 | int err = 0; | |
990 | ||
991 | if (!pskb_may_pull(skb, sizeof(*icmp6h))) | |
992 | return -EINVAL; | |
993 | ||
994 | icmp6h = icmp6_hdr(skb); | |
995 | num = ntohs(icmp6h->icmp6_dataun.un_data16[1]); | |
996 | len = sizeof(*icmp6h); | |
997 | ||
998 | for (i = 0; i < num; i++) { | |
999 | __be16 *nsrcs, _nsrcs; | |
1000 | ||
1001 | nsrcs = skb_header_pointer(skb, | |
1002 | len + offsetof(struct mld2_grec, | |
1003 | grec_mca), | |
1004 | sizeof(_nsrcs), &_nsrcs); | |
1005 | if (!nsrcs) | |
1006 | return -EINVAL; | |
1007 | ||
1008 | if (!pskb_may_pull(skb, | |
1009 | len + sizeof(*grec) + | |
1010 | sizeof(struct in6_addr) * (*nsrcs))) | |
1011 | return -EINVAL; | |
1012 | ||
1013 | grec = (struct mld2_grec *)(skb->data + len); | |
1014 | len += sizeof(*grec) + sizeof(struct in6_addr) * (*nsrcs); | |
1015 | ||
1016 | /* We treat these as MLDv1 reports for now. */ | |
1017 | switch (grec->grec_type) { | |
1018 | case MLD2_MODE_IS_INCLUDE: | |
1019 | case MLD2_MODE_IS_EXCLUDE: | |
1020 | case MLD2_CHANGE_TO_INCLUDE: | |
1021 | case MLD2_CHANGE_TO_EXCLUDE: | |
1022 | case MLD2_ALLOW_NEW_SOURCES: | |
1023 | case MLD2_BLOCK_OLD_SOURCES: | |
1024 | break; | |
1025 | ||
1026 | default: | |
1027 | continue; | |
1028 | } | |
1029 | ||
1030 | err = br_ip6_multicast_add_group(br, port, &grec->grec_mca); | |
1031 | if (!err) | |
1032 | break; | |
1033 | } | |
1034 | ||
1035 | return err; | |
1036 | } | |
1037 | #endif | |
1038 | ||
7e80c124 | 1039 | /* |
1040 | * Add port to rotuer_list | |
1041 | * list is maintained ordered by pointer value | |
1042 | * and locked by br->multicast_lock and RCU | |
1043 | */ | |
0909e117 HX |
1044 | static void br_multicast_add_router(struct net_bridge *br, |
1045 | struct net_bridge_port *port) | |
1046 | { | |
dcdca2c4 | 1047 | struct net_bridge_port *p; |
7e80c124 | 1048 | struct hlist_node *n, *slot = NULL; |
dcdca2c4 | 1049 | |
709b9326 | 1050 | hlist_for_each_entry(p, n, &br->router_list, rlist) { |
7e80c124 | 1051 | if ((unsigned long) port >= (unsigned long) p) |
1052 | break; | |
1053 | slot = n; | |
dcdca2c4 | 1054 | } |
1055 | ||
7e80c124 | 1056 | if (slot) |
1057 | hlist_add_after_rcu(slot, &port->rlist); | |
dcdca2c4 | 1058 | else |
1059 | hlist_add_head_rcu(&port->rlist, &br->router_list); | |
0909e117 HX |
1060 | } |
1061 | ||
eb1d1641 HX |
1062 | static void br_multicast_mark_router(struct net_bridge *br, |
1063 | struct net_bridge_port *port) | |
1064 | { | |
1065 | unsigned long now = jiffies; | |
eb1d1641 HX |
1066 | |
1067 | if (!port) { | |
1068 | if (br->multicast_router == 1) | |
1069 | mod_timer(&br->multicast_router_timer, | |
1070 | now + br->multicast_querier_interval); | |
1071 | return; | |
1072 | } | |
1073 | ||
1074 | if (port->multicast_router != 1) | |
1075 | return; | |
1076 | ||
1077 | if (!hlist_unhashed(&port->rlist)) | |
1078 | goto timer; | |
1079 | ||
0909e117 | 1080 | br_multicast_add_router(br, port); |
eb1d1641 HX |
1081 | |
1082 | timer: | |
1083 | mod_timer(&port->multicast_router_timer, | |
1084 | now + br->multicast_querier_interval); | |
1085 | } | |
1086 | ||
1087 | static void br_multicast_query_received(struct net_bridge *br, | |
1088 | struct net_bridge_port *port, | |
8ef2a9a5 | 1089 | int saddr) |
eb1d1641 HX |
1090 | { |
1091 | if (saddr) | |
1092 | mod_timer(&br->multicast_querier_timer, | |
1093 | jiffies + br->multicast_querier_interval); | |
1094 | else if (timer_pending(&br->multicast_querier_timer)) | |
1095 | return; | |
1096 | ||
1097 | br_multicast_mark_router(br, port); | |
1098 | } | |
1099 | ||
8ef2a9a5 YH |
1100 | static int br_ip4_multicast_query(struct net_bridge *br, |
1101 | struct net_bridge_port *port, | |
1102 | struct sk_buff *skb) | |
eb1d1641 HX |
1103 | { |
1104 | struct iphdr *iph = ip_hdr(skb); | |
1105 | struct igmphdr *ih = igmp_hdr(skb); | |
1106 | struct net_bridge_mdb_entry *mp; | |
1107 | struct igmpv3_query *ih3; | |
1108 | struct net_bridge_port_group *p; | |
1109 | struct net_bridge_port_group **pp; | |
1110 | unsigned long max_delay; | |
1111 | unsigned long now = jiffies; | |
1112 | __be32 group; | |
bec68ff1 | 1113 | int err = 0; |
eb1d1641 HX |
1114 | |
1115 | spin_lock(&br->multicast_lock); | |
1116 | if (!netif_running(br->dev) || | |
1117 | (port && port->state == BR_STATE_DISABLED)) | |
1118 | goto out; | |
1119 | ||
8ef2a9a5 | 1120 | br_multicast_query_received(br, port, !!iph->saddr); |
eb1d1641 HX |
1121 | |
1122 | group = ih->group; | |
1123 | ||
1124 | if (skb->len == sizeof(*ih)) { | |
1125 | max_delay = ih->code * (HZ / IGMP_TIMER_SCALE); | |
1126 | ||
1127 | if (!max_delay) { | |
1128 | max_delay = 10 * HZ; | |
1129 | group = 0; | |
1130 | } | |
1131 | } else { | |
bec68ff1 YH |
1132 | if (!pskb_may_pull(skb, sizeof(struct igmpv3_query))) { |
1133 | err = -EINVAL; | |
1134 | goto out; | |
1135 | } | |
eb1d1641 HX |
1136 | |
1137 | ih3 = igmpv3_query_hdr(skb); | |
1138 | if (ih3->nsrcs) | |
bec68ff1 | 1139 | goto out; |
eb1d1641 | 1140 | |
0ba8c9ec YH |
1141 | max_delay = ih3->code ? |
1142 | IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1; | |
eb1d1641 HX |
1143 | } |
1144 | ||
1145 | if (!group) | |
1146 | goto out; | |
1147 | ||
8ef2a9a5 | 1148 | mp = br_mdb_ip4_get(br->mdb, group); |
eb1d1641 HX |
1149 | if (!mp) |
1150 | goto out; | |
1151 | ||
1152 | max_delay *= br->multicast_last_member_count; | |
1153 | ||
1154 | if (!hlist_unhashed(&mp->mglist) && | |
1155 | (timer_pending(&mp->timer) ? | |
1156 | time_after(mp->timer.expires, now + max_delay) : | |
1157 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1158 | mod_timer(&mp->timer, now + max_delay); | |
1159 | ||
1160 | for (pp = &mp->ports; (p = *pp); pp = &p->next) { | |
1161 | if (timer_pending(&p->timer) ? | |
1162 | time_after(p->timer.expires, now + max_delay) : | |
1163 | try_to_del_timer_sync(&p->timer) >= 0) | |
1164 | mod_timer(&mp->timer, now + max_delay); | |
1165 | } | |
1166 | ||
1167 | out: | |
1168 | spin_unlock(&br->multicast_lock); | |
bec68ff1 | 1169 | return err; |
eb1d1641 HX |
1170 | } |
1171 | ||
08b202b6 YH |
1172 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
1173 | static int br_ip6_multicast_query(struct net_bridge *br, | |
1174 | struct net_bridge_port *port, | |
1175 | struct sk_buff *skb) | |
1176 | { | |
1177 | struct ipv6hdr *ip6h = ipv6_hdr(skb); | |
1178 | struct mld_msg *mld = (struct mld_msg *) icmp6_hdr(skb); | |
1179 | struct net_bridge_mdb_entry *mp; | |
1180 | struct mld2_query *mld2q; | |
1181 | struct net_bridge_port_group *p, **pp; | |
1182 | unsigned long max_delay; | |
1183 | unsigned long now = jiffies; | |
1184 | struct in6_addr *group = NULL; | |
1185 | int err = 0; | |
1186 | ||
1187 | spin_lock(&br->multicast_lock); | |
1188 | if (!netif_running(br->dev) || | |
1189 | (port && port->state == BR_STATE_DISABLED)) | |
1190 | goto out; | |
1191 | ||
1192 | br_multicast_query_received(br, port, !ipv6_addr_any(&ip6h->saddr)); | |
1193 | ||
1194 | if (skb->len == sizeof(*mld)) { | |
1195 | if (!pskb_may_pull(skb, sizeof(*mld))) { | |
1196 | err = -EINVAL; | |
1197 | goto out; | |
1198 | } | |
1199 | mld = (struct mld_msg *) icmp6_hdr(skb); | |
1200 | max_delay = msecs_to_jiffies(htons(mld->mld_maxdelay)); | |
1201 | if (max_delay) | |
1202 | group = &mld->mld_mca; | |
1203 | } else if (skb->len >= sizeof(*mld2q)) { | |
1204 | if (!pskb_may_pull(skb, sizeof(*mld2q))) { | |
1205 | err = -EINVAL; | |
1206 | goto out; | |
1207 | } | |
1208 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
1209 | if (!mld2q->mld2q_nsrcs) | |
1210 | group = &mld2q->mld2q_mca; | |
1211 | max_delay = mld2q->mld2q_mrc ? MLDV2_MRC(mld2q->mld2q_mrc) : 1; | |
1212 | } | |
1213 | ||
1214 | if (!group) | |
1215 | goto out; | |
1216 | ||
1217 | mp = br_mdb_ip6_get(br->mdb, group); | |
1218 | if (!mp) | |
1219 | goto out; | |
1220 | ||
1221 | max_delay *= br->multicast_last_member_count; | |
1222 | if (!hlist_unhashed(&mp->mglist) && | |
1223 | (timer_pending(&mp->timer) ? | |
1224 | time_after(mp->timer.expires, now + max_delay) : | |
1225 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1226 | mod_timer(&mp->timer, now + max_delay); | |
1227 | ||
1228 | for (pp = &mp->ports; (p = *pp); pp = &p->next) { | |
1229 | if (timer_pending(&p->timer) ? | |
1230 | time_after(p->timer.expires, now + max_delay) : | |
1231 | try_to_del_timer_sync(&p->timer) >= 0) | |
1232 | mod_timer(&mp->timer, now + max_delay); | |
1233 | } | |
1234 | ||
1235 | out: | |
1236 | spin_unlock(&br->multicast_lock); | |
1237 | return err; | |
1238 | } | |
1239 | #endif | |
1240 | ||
eb1d1641 HX |
1241 | static void br_multicast_leave_group(struct net_bridge *br, |
1242 | struct net_bridge_port *port, | |
8ef2a9a5 | 1243 | struct br_ip *group) |
eb1d1641 HX |
1244 | { |
1245 | struct net_bridge_mdb_htable *mdb; | |
1246 | struct net_bridge_mdb_entry *mp; | |
1247 | struct net_bridge_port_group *p; | |
1248 | unsigned long now; | |
1249 | unsigned long time; | |
1250 | ||
eb1d1641 HX |
1251 | spin_lock(&br->multicast_lock); |
1252 | if (!netif_running(br->dev) || | |
1253 | (port && port->state == BR_STATE_DISABLED) || | |
1254 | timer_pending(&br->multicast_querier_timer)) | |
1255 | goto out; | |
1256 | ||
1257 | mdb = br->mdb; | |
1258 | mp = br_mdb_ip_get(mdb, group); | |
1259 | if (!mp) | |
1260 | goto out; | |
1261 | ||
1262 | now = jiffies; | |
1263 | time = now + br->multicast_last_member_count * | |
1264 | br->multicast_last_member_interval; | |
1265 | ||
1266 | if (!port) { | |
1267 | if (!hlist_unhashed(&mp->mglist) && | |
1268 | (timer_pending(&mp->timer) ? | |
1269 | time_after(mp->timer.expires, time) : | |
1270 | try_to_del_timer_sync(&mp->timer) >= 0)) { | |
1271 | mod_timer(&mp->timer, time); | |
1272 | ||
1273 | mp->queries_sent = 0; | |
1274 | mod_timer(&mp->query_timer, now); | |
1275 | } | |
1276 | ||
1277 | goto out; | |
1278 | } | |
1279 | ||
1280 | for (p = mp->ports; p; p = p->next) { | |
1281 | if (p->port != port) | |
1282 | continue; | |
1283 | ||
1284 | if (!hlist_unhashed(&p->mglist) && | |
1285 | (timer_pending(&p->timer) ? | |
1286 | time_after(p->timer.expires, time) : | |
1287 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1288 | mod_timer(&p->timer, time); | |
1289 | ||
1290 | p->queries_sent = 0; | |
1291 | mod_timer(&p->query_timer, now); | |
1292 | } | |
1293 | ||
1294 | break; | |
1295 | } | |
1296 | ||
1297 | out: | |
1298 | spin_unlock(&br->multicast_lock); | |
1299 | } | |
1300 | ||
8ef2a9a5 YH |
1301 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
1302 | struct net_bridge_port *port, | |
1303 | __be32 group) | |
1304 | { | |
1305 | struct br_ip br_group; | |
1306 | ||
1307 | if (ipv4_is_local_multicast(group)) | |
1308 | return; | |
1309 | ||
1310 | br_group.u.ip4 = group; | |
1311 | br_group.proto = htons(ETH_P_IP); | |
1312 | ||
1313 | br_multicast_leave_group(br, port, &br_group); | |
1314 | } | |
1315 | ||
08b202b6 YH |
1316 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
1317 | static void br_ip6_multicast_leave_group(struct net_bridge *br, | |
1318 | struct net_bridge_port *port, | |
1319 | const struct in6_addr *group) | |
1320 | { | |
1321 | struct br_ip br_group; | |
1322 | ||
1323 | if (ipv6_is_local_multicast(group)) | |
1324 | return; | |
1325 | ||
1326 | ipv6_addr_copy(&br_group.u.ip6, group); | |
1327 | br_group.proto = htons(ETH_P_IPV6); | |
1328 | ||
1329 | br_multicast_leave_group(br, port, &br_group); | |
1330 | } | |
1331 | #endif | |
8ef2a9a5 | 1332 | |
eb1d1641 HX |
1333 | static int br_multicast_ipv4_rcv(struct net_bridge *br, |
1334 | struct net_bridge_port *port, | |
1335 | struct sk_buff *skb) | |
1336 | { | |
1337 | struct sk_buff *skb2 = skb; | |
1338 | struct iphdr *iph; | |
1339 | struct igmphdr *ih; | |
1340 | unsigned len; | |
1341 | unsigned offset; | |
1342 | int err; | |
1343 | ||
eb1d1641 HX |
1344 | /* We treat OOM as packet loss for now. */ |
1345 | if (!pskb_may_pull(skb, sizeof(*iph))) | |
1346 | return -EINVAL; | |
1347 | ||
1348 | iph = ip_hdr(skb); | |
1349 | ||
1350 | if (iph->ihl < 5 || iph->version != 4) | |
1351 | return -EINVAL; | |
1352 | ||
1353 | if (!pskb_may_pull(skb, ip_hdrlen(skb))) | |
1354 | return -EINVAL; | |
1355 | ||
1356 | iph = ip_hdr(skb); | |
1357 | ||
1358 | if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl))) | |
1359 | return -EINVAL; | |
1360 | ||
1361 | if (iph->protocol != IPPROTO_IGMP) | |
1362 | return 0; | |
1363 | ||
1364 | len = ntohs(iph->tot_len); | |
1365 | if (skb->len < len || len < ip_hdrlen(skb)) | |
1366 | return -EINVAL; | |
1367 | ||
1368 | if (skb->len > len) { | |
1369 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
1370 | if (!skb2) | |
1371 | return -ENOMEM; | |
1372 | ||
1373 | err = pskb_trim_rcsum(skb2, len); | |
1374 | if (err) | |
8440853b | 1375 | goto err_out; |
eb1d1641 HX |
1376 | } |
1377 | ||
1378 | len -= ip_hdrlen(skb2); | |
1379 | offset = skb_network_offset(skb2) + ip_hdrlen(skb2); | |
1380 | __skb_pull(skb2, offset); | |
1381 | skb_reset_transport_header(skb2); | |
1382 | ||
1383 | err = -EINVAL; | |
1384 | if (!pskb_may_pull(skb2, sizeof(*ih))) | |
1385 | goto out; | |
1386 | ||
eb1d1641 HX |
1387 | switch (skb2->ip_summed) { |
1388 | case CHECKSUM_COMPLETE: | |
1389 | if (!csum_fold(skb2->csum)) | |
1390 | break; | |
1391 | /* fall through */ | |
1392 | case CHECKSUM_NONE: | |
1393 | skb2->csum = 0; | |
1394 | if (skb_checksum_complete(skb2)) | |
8440853b | 1395 | goto out; |
eb1d1641 HX |
1396 | } |
1397 | ||
1398 | err = 0; | |
1399 | ||
1400 | BR_INPUT_SKB_CB(skb)->igmp = 1; | |
1401 | ih = igmp_hdr(skb2); | |
1402 | ||
1403 | switch (ih->type) { | |
1404 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
1405 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
1406 | BR_INPUT_SKB_CB(skb2)->mrouters_only = 1; | |
8ef2a9a5 | 1407 | err = br_ip4_multicast_add_group(br, port, ih->group); |
eb1d1641 HX |
1408 | break; |
1409 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
8ef2a9a5 | 1410 | err = br_ip4_multicast_igmp3_report(br, port, skb2); |
eb1d1641 HX |
1411 | break; |
1412 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
8ef2a9a5 | 1413 | err = br_ip4_multicast_query(br, port, skb2); |
eb1d1641 HX |
1414 | break; |
1415 | case IGMP_HOST_LEAVE_MESSAGE: | |
8ef2a9a5 | 1416 | br_ip4_multicast_leave_group(br, port, ih->group); |
eb1d1641 HX |
1417 | break; |
1418 | } | |
1419 | ||
1420 | out: | |
1421 | __skb_push(skb2, offset); | |
8440853b | 1422 | err_out: |
eb1d1641 HX |
1423 | if (skb2 != skb) |
1424 | kfree_skb(skb2); | |
1425 | return err; | |
1426 | } | |
1427 | ||
08b202b6 YH |
1428 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
1429 | static int br_multicast_ipv6_rcv(struct net_bridge *br, | |
1430 | struct net_bridge_port *port, | |
1431 | struct sk_buff *skb) | |
1432 | { | |
1433 | struct sk_buff *skb2 = skb; | |
1434 | struct ipv6hdr *ip6h; | |
1435 | struct icmp6hdr *icmp6h; | |
1436 | u8 nexthdr; | |
1437 | unsigned len; | |
1438 | unsigned offset; | |
1439 | int err; | |
1440 | ||
08b202b6 YH |
1441 | if (!pskb_may_pull(skb, sizeof(*ip6h))) |
1442 | return -EINVAL; | |
1443 | ||
1444 | ip6h = ipv6_hdr(skb); | |
1445 | ||
1446 | /* | |
1447 | * We're interested in MLD messages only. | |
1448 | * - Version is 6 | |
1449 | * - MLD has always Router Alert hop-by-hop option | |
1450 | * - But we do not support jumbrograms. | |
1451 | */ | |
1452 | if (ip6h->version != 6 || | |
1453 | ip6h->nexthdr != IPPROTO_HOPOPTS || | |
1454 | ip6h->payload_len == 0) | |
1455 | return 0; | |
1456 | ||
1457 | len = ntohs(ip6h->payload_len); | |
1458 | if (skb->len < len) | |
1459 | return -EINVAL; | |
1460 | ||
1461 | nexthdr = ip6h->nexthdr; | |
1462 | offset = ipv6_skip_exthdr(skb, sizeof(*ip6h), &nexthdr); | |
1463 | ||
1464 | if (offset < 0 || nexthdr != IPPROTO_ICMPV6) | |
1465 | return 0; | |
1466 | ||
1467 | /* Okay, we found ICMPv6 header */ | |
1468 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
1469 | if (!skb2) | |
1470 | return -ENOMEM; | |
1471 | ||
1472 | len -= offset - skb_network_offset(skb2); | |
1473 | ||
1474 | __skb_pull(skb2, offset); | |
1475 | skb_reset_transport_header(skb2); | |
1476 | ||
1477 | err = -EINVAL; | |
1478 | if (!pskb_may_pull(skb2, sizeof(*icmp6h))) | |
1479 | goto out; | |
1480 | ||
1481 | icmp6h = icmp6_hdr(skb2); | |
1482 | ||
1483 | switch (icmp6h->icmp6_type) { | |
1484 | case ICMPV6_MGM_QUERY: | |
1485 | case ICMPV6_MGM_REPORT: | |
1486 | case ICMPV6_MGM_REDUCTION: | |
1487 | case ICMPV6_MLD2_REPORT: | |
1488 | break; | |
1489 | default: | |
1490 | err = 0; | |
1491 | goto out; | |
1492 | } | |
1493 | ||
1494 | /* Okay, we found MLD message. Check further. */ | |
1495 | if (skb2->len > len) { | |
1496 | err = pskb_trim_rcsum(skb2, len); | |
1497 | if (err) | |
1498 | goto out; | |
1499 | } | |
1500 | ||
1501 | switch (skb2->ip_summed) { | |
1502 | case CHECKSUM_COMPLETE: | |
1503 | if (!csum_fold(skb2->csum)) | |
1504 | break; | |
1505 | /*FALLTHROUGH*/ | |
1506 | case CHECKSUM_NONE: | |
1507 | skb2->csum = 0; | |
1508 | if (skb_checksum_complete(skb2)) | |
1509 | goto out; | |
1510 | } | |
1511 | ||
1512 | err = 0; | |
1513 | ||
1514 | BR_INPUT_SKB_CB(skb)->igmp = 1; | |
1515 | ||
1516 | switch (icmp6h->icmp6_type) { | |
1517 | case ICMPV6_MGM_REPORT: | |
1518 | { | |
1519 | struct mld_msg *mld = (struct mld_msg *)icmp6h; | |
1520 | BR_INPUT_SKB_CB(skb2)->mrouters_only = 1; | |
1521 | err = br_ip6_multicast_add_group(br, port, &mld->mld_mca); | |
1522 | break; | |
1523 | } | |
1524 | case ICMPV6_MLD2_REPORT: | |
1525 | err = br_ip6_multicast_mld2_report(br, port, skb2); | |
1526 | break; | |
1527 | case ICMPV6_MGM_QUERY: | |
1528 | err = br_ip6_multicast_query(br, port, skb2); | |
1529 | break; | |
1530 | case ICMPV6_MGM_REDUCTION: | |
1531 | { | |
1532 | struct mld_msg *mld = (struct mld_msg *)icmp6h; | |
1533 | br_ip6_multicast_leave_group(br, port, &mld->mld_mca); | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | out: | |
1538 | __skb_push(skb2, offset); | |
1539 | if (skb2 != skb) | |
1540 | kfree_skb(skb2); | |
1541 | return err; | |
1542 | } | |
1543 | #endif | |
1544 | ||
eb1d1641 HX |
1545 | int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, |
1546 | struct sk_buff *skb) | |
1547 | { | |
1fafc7a9 YH |
1548 | BR_INPUT_SKB_CB(skb)->igmp = 0; |
1549 | BR_INPUT_SKB_CB(skb)->mrouters_only = 0; | |
1550 | ||
eb1d1641 HX |
1551 | if (br->multicast_disabled) |
1552 | return 0; | |
1553 | ||
1554 | switch (skb->protocol) { | |
1555 | case htons(ETH_P_IP): | |
1556 | return br_multicast_ipv4_rcv(br, port, skb); | |
08b202b6 YH |
1557 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
1558 | case htons(ETH_P_IPV6): | |
1559 | return br_multicast_ipv6_rcv(br, port, skb); | |
1560 | #endif | |
eb1d1641 HX |
1561 | } |
1562 | ||
1563 | return 0; | |
1564 | } | |
1565 | ||
1566 | static void br_multicast_query_expired(unsigned long data) | |
1567 | { | |
1568 | struct net_bridge *br = (void *)data; | |
1569 | ||
1570 | spin_lock(&br->multicast_lock); | |
1571 | if (br->multicast_startup_queries_sent < | |
1572 | br->multicast_startup_query_count) | |
1573 | br->multicast_startup_queries_sent++; | |
1574 | ||
1575 | br_multicast_send_query(br, NULL, br->multicast_startup_queries_sent); | |
1576 | ||
1577 | spin_unlock(&br->multicast_lock); | |
1578 | } | |
1579 | ||
1580 | void br_multicast_init(struct net_bridge *br) | |
1581 | { | |
1582 | br->hash_elasticity = 4; | |
1583 | br->hash_max = 512; | |
1584 | ||
1585 | br->multicast_router = 1; | |
1586 | br->multicast_last_member_count = 2; | |
1587 | br->multicast_startup_query_count = 2; | |
1588 | ||
1589 | br->multicast_last_member_interval = HZ; | |
1590 | br->multicast_query_response_interval = 10 * HZ; | |
1591 | br->multicast_startup_query_interval = 125 * HZ / 4; | |
1592 | br->multicast_query_interval = 125 * HZ; | |
1593 | br->multicast_querier_interval = 255 * HZ; | |
1594 | br->multicast_membership_interval = 260 * HZ; | |
1595 | ||
1596 | spin_lock_init(&br->multicast_lock); | |
1597 | setup_timer(&br->multicast_router_timer, | |
1598 | br_multicast_local_router_expired, 0); | |
1599 | setup_timer(&br->multicast_querier_timer, | |
1600 | br_multicast_local_router_expired, 0); | |
1601 | setup_timer(&br->multicast_query_timer, br_multicast_query_expired, | |
1602 | (unsigned long)br); | |
1603 | } | |
1604 | ||
1605 | void br_multicast_open(struct net_bridge *br) | |
1606 | { | |
1607 | br->multicast_startup_queries_sent = 0; | |
1608 | ||
1609 | if (br->multicast_disabled) | |
1610 | return; | |
1611 | ||
1612 | mod_timer(&br->multicast_query_timer, jiffies); | |
1613 | } | |
1614 | ||
1615 | void br_multicast_stop(struct net_bridge *br) | |
1616 | { | |
1617 | struct net_bridge_mdb_htable *mdb; | |
1618 | struct net_bridge_mdb_entry *mp; | |
1619 | struct hlist_node *p, *n; | |
1620 | u32 ver; | |
1621 | int i; | |
1622 | ||
1623 | del_timer_sync(&br->multicast_router_timer); | |
1624 | del_timer_sync(&br->multicast_querier_timer); | |
1625 | del_timer_sync(&br->multicast_query_timer); | |
1626 | ||
1627 | spin_lock_bh(&br->multicast_lock); | |
1628 | mdb = br->mdb; | |
1629 | if (!mdb) | |
1630 | goto out; | |
1631 | ||
1632 | br->mdb = NULL; | |
1633 | ||
1634 | ver = mdb->ver; | |
1635 | for (i = 0; i < mdb->max; i++) { | |
1636 | hlist_for_each_entry_safe(mp, p, n, &mdb->mhash[i], | |
1637 | hlist[ver]) { | |
1638 | del_timer(&mp->timer); | |
1639 | del_timer(&mp->query_timer); | |
1640 | call_rcu_bh(&mp->rcu, br_multicast_free_group); | |
1641 | } | |
1642 | } | |
1643 | ||
1644 | if (mdb->old) { | |
1645 | spin_unlock_bh(&br->multicast_lock); | |
10cc2b50 | 1646 | rcu_barrier_bh(); |
eb1d1641 HX |
1647 | spin_lock_bh(&br->multicast_lock); |
1648 | WARN_ON(mdb->old); | |
1649 | } | |
1650 | ||
1651 | mdb->old = mdb; | |
1652 | call_rcu_bh(&mdb->rcu, br_mdb_free); | |
1653 | ||
1654 | out: | |
1655 | spin_unlock_bh(&br->multicast_lock); | |
1656 | } | |
0909e117 HX |
1657 | |
1658 | int br_multicast_set_router(struct net_bridge *br, unsigned long val) | |
1659 | { | |
1660 | int err = -ENOENT; | |
1661 | ||
1662 | spin_lock_bh(&br->multicast_lock); | |
1663 | if (!netif_running(br->dev)) | |
1664 | goto unlock; | |
1665 | ||
1666 | switch (val) { | |
1667 | case 0: | |
1668 | case 2: | |
1669 | del_timer(&br->multicast_router_timer); | |
1670 | /* fall through */ | |
1671 | case 1: | |
1672 | br->multicast_router = val; | |
1673 | err = 0; | |
1674 | break; | |
1675 | ||
1676 | default: | |
1677 | err = -EINVAL; | |
1678 | break; | |
1679 | } | |
1680 | ||
1681 | unlock: | |
1682 | spin_unlock_bh(&br->multicast_lock); | |
1683 | ||
1684 | return err; | |
1685 | } | |
1686 | ||
1687 | int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val) | |
1688 | { | |
1689 | struct net_bridge *br = p->br; | |
1690 | int err = -ENOENT; | |
1691 | ||
1692 | spin_lock(&br->multicast_lock); | |
1693 | if (!netif_running(br->dev) || p->state == BR_STATE_DISABLED) | |
1694 | goto unlock; | |
1695 | ||
1696 | switch (val) { | |
1697 | case 0: | |
1698 | case 1: | |
1699 | case 2: | |
1700 | p->multicast_router = val; | |
1701 | err = 0; | |
1702 | ||
1703 | if (val < 2 && !hlist_unhashed(&p->rlist)) | |
1704 | hlist_del_init_rcu(&p->rlist); | |
1705 | ||
1706 | if (val == 1) | |
1707 | break; | |
1708 | ||
1709 | del_timer(&p->multicast_router_timer); | |
1710 | ||
1711 | if (val == 0) | |
1712 | break; | |
1713 | ||
1714 | br_multicast_add_router(br, p); | |
1715 | break; | |
1716 | ||
1717 | default: | |
1718 | err = -EINVAL; | |
1719 | break; | |
1720 | } | |
1721 | ||
1722 | unlock: | |
1723 | spin_unlock(&br->multicast_lock); | |
1724 | ||
1725 | return err; | |
1726 | } | |
561f1103 HX |
1727 | |
1728 | int br_multicast_toggle(struct net_bridge *br, unsigned long val) | |
1729 | { | |
1730 | struct net_bridge_port *port; | |
1731 | int err = -ENOENT; | |
1732 | ||
1733 | spin_lock(&br->multicast_lock); | |
1734 | if (!netif_running(br->dev)) | |
1735 | goto unlock; | |
1736 | ||
1737 | err = 0; | |
1738 | if (br->multicast_disabled == !val) | |
1739 | goto unlock; | |
1740 | ||
1741 | br->multicast_disabled = !val; | |
1742 | if (br->multicast_disabled) | |
1743 | goto unlock; | |
1744 | ||
1745 | if (br->mdb) { | |
1746 | if (br->mdb->old) { | |
1747 | err = -EEXIST; | |
1748 | rollback: | |
1749 | br->multicast_disabled = !!val; | |
1750 | goto unlock; | |
1751 | } | |
1752 | ||
1753 | err = br_mdb_rehash(&br->mdb, br->mdb->max, | |
1754 | br->hash_elasticity); | |
1755 | if (err) | |
1756 | goto rollback; | |
1757 | } | |
1758 | ||
1759 | br_multicast_open(br); | |
1760 | list_for_each_entry(port, &br->port_list, list) { | |
1761 | if (port->state == BR_STATE_DISABLED || | |
1762 | port->state == BR_STATE_BLOCKING) | |
1763 | continue; | |
1764 | ||
1765 | __br_multicast_enable_port(port); | |
1766 | } | |
1767 | ||
1768 | unlock: | |
1769 | spin_unlock(&br->multicast_lock); | |
1770 | ||
1771 | return err; | |
1772 | } | |
b195167f HX |
1773 | |
1774 | int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val) | |
1775 | { | |
1776 | int err = -ENOENT; | |
1777 | u32 old; | |
1778 | ||
1779 | spin_lock(&br->multicast_lock); | |
1780 | if (!netif_running(br->dev)) | |
1781 | goto unlock; | |
1782 | ||
1783 | err = -EINVAL; | |
1784 | if (!is_power_of_2(val)) | |
1785 | goto unlock; | |
1786 | if (br->mdb && val < br->mdb->size) | |
1787 | goto unlock; | |
1788 | ||
1789 | err = 0; | |
1790 | ||
1791 | old = br->hash_max; | |
1792 | br->hash_max = val; | |
1793 | ||
1794 | if (br->mdb) { | |
1795 | if (br->mdb->old) { | |
1796 | err = -EEXIST; | |
1797 | rollback: | |
1798 | br->hash_max = old; | |
1799 | goto unlock; | |
1800 | } | |
1801 | ||
1802 | err = br_mdb_rehash(&br->mdb, br->hash_max, | |
1803 | br->hash_elasticity); | |
1804 | if (err) | |
1805 | goto rollback; | |
1806 | } | |
1807 | ||
1808 | unlock: | |
1809 | spin_unlock(&br->multicast_lock); | |
1810 | ||
1811 | return err; | |
1812 | } |