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