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Commit | Line | Data |
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eb1d1641 HX |
1 | /* |
2 | * Bridge multicast support. | |
3 | * | |
4 | * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/err.h> | |
07f8ac4a | 14 | #include <linux/export.h> |
eb1d1641 HX |
15 | #include <linux/if_ether.h> |
16 | #include <linux/igmp.h> | |
17 | #include <linux/jhash.h> | |
18 | #include <linux/kernel.h> | |
b195167f | 19 | #include <linux/log2.h> |
eb1d1641 HX |
20 | #include <linux/netdevice.h> |
21 | #include <linux/netfilter_bridge.h> | |
22 | #include <linux/random.h> | |
23 | #include <linux/rculist.h> | |
24 | #include <linux/skbuff.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/timer.h> | |
1c8ad5bf | 27 | #include <linux/inetdevice.h> |
91b02d3d | 28 | #include <linux/mroute.h> |
eb1d1641 | 29 | #include <net/ip.h> |
147c1e9b | 30 | #include <net/switchdev.h> |
dfd56b8b | 31 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
32 | #include <net/ipv6.h> |
33 | #include <net/mld.h> | |
d4c4f07d | 34 | #include <net/ip6_checksum.h> |
3c3769e6 | 35 | #include <net/addrconf.h> |
08b202b6 | 36 | #endif |
eb1d1641 HX |
37 | |
38 | #include "br_private.h" | |
39 | ||
cc0fdd80 | 40 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 41 | struct bridge_mcast_own_query *query); |
754bc547 SA |
42 | static void br_multicast_add_router(struct net_bridge *br, |
43 | struct net_bridge_port *port); | |
bc8c20ac SA |
44 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
45 | struct net_bridge_port *port, | |
46 | __be32 group, | |
6db6f0ea FF |
47 | __u16 vid, |
48 | const unsigned char *src); | |
49 | ||
f12e7d95 | 50 | static void __del_port_router(struct net_bridge_port *p); |
bc8c20ac SA |
51 | #if IS_ENABLED(CONFIG_IPV6) |
52 | static void br_ip6_multicast_leave_group(struct net_bridge *br, | |
53 | struct net_bridge_port *port, | |
54 | const struct in6_addr *group, | |
6db6f0ea | 55 | __u16 vid, const unsigned char *src); |
bc8c20ac | 56 | #endif |
2ce297fc | 57 | unsigned int br_mdb_rehash_seq; |
c83b8fab | 58 | |
8ef2a9a5 YH |
59 | static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b) |
60 | { | |
61 | if (a->proto != b->proto) | |
62 | return 0; | |
b0e9a30d VY |
63 | if (a->vid != b->vid) |
64 | return 0; | |
8ef2a9a5 YH |
65 | switch (a->proto) { |
66 | case htons(ETH_P_IP): | |
67 | return a->u.ip4 == b->u.ip4; | |
dfd56b8b | 68 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
69 | case htons(ETH_P_IPV6): |
70 | return ipv6_addr_equal(&a->u.ip6, &b->u.ip6); | |
71 | #endif | |
8ef2a9a5 YH |
72 | } |
73 | return 0; | |
74 | } | |
75 | ||
b0e9a30d VY |
76 | static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip, |
77 | __u16 vid) | |
eb1d1641 | 78 | { |
b0e9a30d | 79 | return jhash_2words((__force u32)ip, vid, mdb->secret) & (mdb->max - 1); |
eb1d1641 HX |
80 | } |
81 | ||
dfd56b8b | 82 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 83 | static inline int __br_ip6_hash(struct net_bridge_mdb_htable *mdb, |
b0e9a30d VY |
84 | const struct in6_addr *ip, |
85 | __u16 vid) | |
08b202b6 | 86 | { |
b0e9a30d VY |
87 | return jhash_2words(ipv6_addr_hash(ip), vid, |
88 | mdb->secret) & (mdb->max - 1); | |
08b202b6 YH |
89 | } |
90 | #endif | |
91 | ||
8ef2a9a5 YH |
92 | static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb, |
93 | struct br_ip *ip) | |
94 | { | |
95 | switch (ip->proto) { | |
96 | case htons(ETH_P_IP): | |
b0e9a30d | 97 | return __br_ip4_hash(mdb, ip->u.ip4, ip->vid); |
dfd56b8b | 98 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 99 | case htons(ETH_P_IPV6): |
b0e9a30d | 100 | return __br_ip6_hash(mdb, &ip->u.ip6, ip->vid); |
08b202b6 | 101 | #endif |
8ef2a9a5 YH |
102 | } |
103 | return 0; | |
eb1d1641 HX |
104 | } |
105 | ||
106 | static struct net_bridge_mdb_entry *__br_mdb_ip_get( | |
8ef2a9a5 | 107 | struct net_bridge_mdb_htable *mdb, struct br_ip *dst, int hash) |
eb1d1641 HX |
108 | { |
109 | struct net_bridge_mdb_entry *mp; | |
eb1d1641 | 110 | |
b67bfe0d | 111 | hlist_for_each_entry_rcu(mp, &mdb->mhash[hash], hlist[mdb->ver]) { |
8ef2a9a5 | 112 | if (br_ip_equal(&mp->addr, dst)) |
eb1d1641 HX |
113 | return mp; |
114 | } | |
115 | ||
116 | return NULL; | |
117 | } | |
118 | ||
cfd56754 CW |
119 | struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, |
120 | struct br_ip *dst) | |
7f285fa7 HX |
121 | { |
122 | if (!mdb) | |
123 | return NULL; | |
124 | ||
125 | return __br_mdb_ip_get(mdb, dst, br_ip_hash(mdb, dst)); | |
126 | } | |
127 | ||
8ef2a9a5 | 128 | static struct net_bridge_mdb_entry *br_mdb_ip4_get( |
b0e9a30d | 129 | struct net_bridge_mdb_htable *mdb, __be32 dst, __u16 vid) |
eb1d1641 | 130 | { |
8ef2a9a5 YH |
131 | struct br_ip br_dst; |
132 | ||
133 | br_dst.u.ip4 = dst; | |
134 | br_dst.proto = htons(ETH_P_IP); | |
b0e9a30d | 135 | br_dst.vid = vid; |
0821ec55 | 136 | |
7f285fa7 | 137 | return br_mdb_ip_get(mdb, &br_dst); |
8ef2a9a5 YH |
138 | } |
139 | ||
dfd56b8b | 140 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 141 | static struct net_bridge_mdb_entry *br_mdb_ip6_get( |
b0e9a30d VY |
142 | struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst, |
143 | __u16 vid) | |
08b202b6 YH |
144 | { |
145 | struct br_ip br_dst; | |
0821ec55 | 146 | |
4e3fd7a0 | 147 | br_dst.u.ip6 = *dst; |
08b202b6 | 148 | br_dst.proto = htons(ETH_P_IPV6); |
b0e9a30d | 149 | br_dst.vid = vid; |
08b202b6 | 150 | |
7f285fa7 | 151 | return br_mdb_ip_get(mdb, &br_dst); |
08b202b6 YH |
152 | } |
153 | #endif | |
154 | ||
eb1d1641 | 155 | struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, |
fbca58a2 | 156 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 157 | { |
e8051688 | 158 | struct net_bridge_mdb_htable *mdb = rcu_dereference(br->mdb); |
8ef2a9a5 YH |
159 | struct br_ip ip; |
160 | ||
13cefad2 | 161 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
162 | return NULL; |
163 | ||
8ef2a9a5 | 164 | if (BR_INPUT_SKB_CB(skb)->igmp) |
eb1d1641 HX |
165 | return NULL; |
166 | ||
8ef2a9a5 | 167 | ip.proto = skb->protocol; |
fbca58a2 | 168 | ip.vid = vid; |
8ef2a9a5 | 169 | |
eb1d1641 HX |
170 | switch (skb->protocol) { |
171 | case htons(ETH_P_IP): | |
8ef2a9a5 YH |
172 | ip.u.ip4 = ip_hdr(skb)->daddr; |
173 | break; | |
dfd56b8b | 174 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 175 | case htons(ETH_P_IPV6): |
4e3fd7a0 | 176 | ip.u.ip6 = ipv6_hdr(skb)->daddr; |
08b202b6 YH |
177 | break; |
178 | #endif | |
8ef2a9a5 YH |
179 | default: |
180 | return NULL; | |
eb1d1641 HX |
181 | } |
182 | ||
8ef2a9a5 | 183 | return br_mdb_ip_get(mdb, &ip); |
eb1d1641 HX |
184 | } |
185 | ||
186 | static void br_mdb_free(struct rcu_head *head) | |
187 | { | |
188 | struct net_bridge_mdb_htable *mdb = | |
189 | container_of(head, struct net_bridge_mdb_htable, rcu); | |
190 | struct net_bridge_mdb_htable *old = mdb->old; | |
191 | ||
192 | mdb->old = NULL; | |
193 | kfree(old->mhash); | |
194 | kfree(old); | |
195 | } | |
196 | ||
197 | static int br_mdb_copy(struct net_bridge_mdb_htable *new, | |
198 | struct net_bridge_mdb_htable *old, | |
199 | int elasticity) | |
200 | { | |
201 | struct net_bridge_mdb_entry *mp; | |
eb1d1641 HX |
202 | int maxlen; |
203 | int len; | |
204 | int i; | |
205 | ||
206 | for (i = 0; i < old->max; i++) | |
b67bfe0d | 207 | hlist_for_each_entry(mp, &old->mhash[i], hlist[old->ver]) |
eb1d1641 | 208 | hlist_add_head(&mp->hlist[new->ver], |
8ef2a9a5 | 209 | &new->mhash[br_ip_hash(new, &mp->addr)]); |
eb1d1641 HX |
210 | |
211 | if (!elasticity) | |
212 | return 0; | |
213 | ||
214 | maxlen = 0; | |
215 | for (i = 0; i < new->max; i++) { | |
216 | len = 0; | |
b67bfe0d | 217 | hlist_for_each_entry(mp, &new->mhash[i], hlist[new->ver]) |
eb1d1641 HX |
218 | len++; |
219 | if (len > maxlen) | |
220 | maxlen = len; | |
221 | } | |
222 | ||
223 | return maxlen > elasticity ? -EINVAL : 0; | |
224 | } | |
225 | ||
cfd56754 | 226 | void br_multicast_free_pg(struct rcu_head *head) |
eb1d1641 HX |
227 | { |
228 | struct net_bridge_port_group *p = | |
229 | container_of(head, struct net_bridge_port_group, rcu); | |
230 | ||
231 | kfree(p); | |
232 | } | |
233 | ||
234 | static void br_multicast_free_group(struct rcu_head *head) | |
235 | { | |
236 | struct net_bridge_mdb_entry *mp = | |
237 | container_of(head, struct net_bridge_mdb_entry, rcu); | |
238 | ||
239 | kfree(mp); | |
240 | } | |
241 | ||
88c1f37f | 242 | static void br_multicast_group_expired(struct timer_list *t) |
eb1d1641 | 243 | { |
88c1f37f | 244 | struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer); |
eb1d1641 HX |
245 | struct net_bridge *br = mp->br; |
246 | struct net_bridge_mdb_htable *mdb; | |
247 | ||
248 | spin_lock(&br->multicast_lock); | |
249 | if (!netif_running(br->dev) || timer_pending(&mp->timer)) | |
250 | goto out; | |
251 | ||
ff0fd34e | 252 | mp->host_joined = false; |
2a26028d | 253 | br_mdb_notify(br->dev, NULL, &mp->addr, RTM_DELMDB, 0); |
eb1d1641 HX |
254 | |
255 | if (mp->ports) | |
256 | goto out; | |
257 | ||
e8051688 ED |
258 | mdb = mlock_dereference(br->mdb, br); |
259 | ||
eb1d1641 HX |
260 | hlist_del_rcu(&mp->hlist[mdb->ver]); |
261 | mdb->size--; | |
262 | ||
eb1d1641 HX |
263 | call_rcu_bh(&mp->rcu, br_multicast_free_group); |
264 | ||
265 | out: | |
266 | spin_unlock(&br->multicast_lock); | |
267 | } | |
268 | ||
269 | static void br_multicast_del_pg(struct net_bridge *br, | |
270 | struct net_bridge_port_group *pg) | |
271 | { | |
e8051688 | 272 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 HX |
273 | struct net_bridge_mdb_entry *mp; |
274 | struct net_bridge_port_group *p; | |
e8051688 ED |
275 | struct net_bridge_port_group __rcu **pp; |
276 | ||
277 | mdb = mlock_dereference(br->mdb, br); | |
eb1d1641 | 278 | |
8ef2a9a5 | 279 | mp = br_mdb_ip_get(mdb, &pg->addr); |
eb1d1641 HX |
280 | if (WARN_ON(!mp)) |
281 | return; | |
282 | ||
e8051688 ED |
283 | for (pp = &mp->ports; |
284 | (p = mlock_dereference(*pp, br)) != NULL; | |
285 | pp = &p->next) { | |
eb1d1641 HX |
286 | if (p != pg) |
287 | continue; | |
288 | ||
83f6a740 | 289 | rcu_assign_pointer(*pp, p->next); |
eb1d1641 HX |
290 | hlist_del_init(&p->mglist); |
291 | del_timer(&p->timer); | |
45ebcce5 ER |
292 | br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB, |
293 | p->flags); | |
eb1d1641 HX |
294 | call_rcu_bh(&p->rcu, br_multicast_free_pg); |
295 | ||
ff0fd34e | 296 | if (!mp->ports && !mp->host_joined && |
eb1d1641 HX |
297 | netif_running(br->dev)) |
298 | mod_timer(&mp->timer, jiffies); | |
299 | ||
300 | return; | |
301 | } | |
302 | ||
303 | WARN_ON(1); | |
304 | } | |
305 | ||
88c1f37f | 306 | static void br_multicast_port_group_expired(struct timer_list *t) |
eb1d1641 | 307 | { |
88c1f37f | 308 | struct net_bridge_port_group *pg = from_timer(pg, t, timer); |
eb1d1641 HX |
309 | struct net_bridge *br = pg->port->br; |
310 | ||
311 | spin_lock(&br->multicast_lock); | |
312 | if (!netif_running(br->dev) || timer_pending(&pg->timer) || | |
9d06b6d8 | 313 | hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT) |
eb1d1641 HX |
314 | goto out; |
315 | ||
316 | br_multicast_del_pg(br, pg); | |
317 | ||
318 | out: | |
319 | spin_unlock(&br->multicast_lock); | |
320 | } | |
321 | ||
e8051688 | 322 | static int br_mdb_rehash(struct net_bridge_mdb_htable __rcu **mdbp, int max, |
eb1d1641 HX |
323 | int elasticity) |
324 | { | |
e8051688 | 325 | struct net_bridge_mdb_htable *old = rcu_dereference_protected(*mdbp, 1); |
eb1d1641 HX |
326 | struct net_bridge_mdb_htable *mdb; |
327 | int err; | |
328 | ||
329 | mdb = kmalloc(sizeof(*mdb), GFP_ATOMIC); | |
330 | if (!mdb) | |
331 | return -ENOMEM; | |
332 | ||
333 | mdb->max = max; | |
334 | mdb->old = old; | |
335 | ||
6396bb22 | 336 | mdb->mhash = kcalloc(max, sizeof(*mdb->mhash), GFP_ATOMIC); |
eb1d1641 HX |
337 | if (!mdb->mhash) { |
338 | kfree(mdb); | |
339 | return -ENOMEM; | |
340 | } | |
341 | ||
342 | mdb->size = old ? old->size : 0; | |
343 | mdb->ver = old ? old->ver ^ 1 : 0; | |
344 | ||
345 | if (!old || elasticity) | |
346 | get_random_bytes(&mdb->secret, sizeof(mdb->secret)); | |
347 | else | |
348 | mdb->secret = old->secret; | |
349 | ||
350 | if (!old) | |
351 | goto out; | |
352 | ||
353 | err = br_mdb_copy(mdb, old, elasticity); | |
354 | if (err) { | |
355 | kfree(mdb->mhash); | |
356 | kfree(mdb); | |
357 | return err; | |
358 | } | |
359 | ||
2ce297fc | 360 | br_mdb_rehash_seq++; |
eb1d1641 HX |
361 | call_rcu_bh(&mdb->rcu, br_mdb_free); |
362 | ||
363 | out: | |
364 | rcu_assign_pointer(*mdbp, mdb); | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
8ef2a9a5 | 369 | static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
370 | __be32 group, |
371 | u8 *igmp_type) | |
eb1d1641 | 372 | { |
5e923585 NA |
373 | struct igmpv3_query *ihv3; |
374 | size_t igmp_hdr_size; | |
eb1d1641 HX |
375 | struct sk_buff *skb; |
376 | struct igmphdr *ih; | |
377 | struct ethhdr *eth; | |
378 | struct iphdr *iph; | |
379 | ||
5e923585 NA |
380 | igmp_hdr_size = sizeof(*ih); |
381 | if (br->multicast_igmp_version == 3) | |
382 | igmp_hdr_size = sizeof(*ihv3); | |
eb1d1641 | 383 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) + |
5e923585 | 384 | igmp_hdr_size + 4); |
eb1d1641 HX |
385 | if (!skb) |
386 | goto out; | |
387 | ||
388 | skb->protocol = htons(ETH_P_IP); | |
389 | ||
390 | skb_reset_mac_header(skb); | |
391 | eth = eth_hdr(skb); | |
392 | ||
e5a727f6 | 393 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
eb1d1641 HX |
394 | eth->h_dest[0] = 1; |
395 | eth->h_dest[1] = 0; | |
396 | eth->h_dest[2] = 0x5e; | |
397 | eth->h_dest[3] = 0; | |
398 | eth->h_dest[4] = 0; | |
399 | eth->h_dest[5] = 1; | |
400 | eth->h_proto = htons(ETH_P_IP); | |
401 | skb_put(skb, sizeof(*eth)); | |
402 | ||
403 | skb_set_network_header(skb, skb->len); | |
404 | iph = ip_hdr(skb); | |
405 | ||
406 | iph->version = 4; | |
407 | iph->ihl = 6; | |
408 | iph->tos = 0xc0; | |
5e923585 | 409 | iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4); |
eb1d1641 HX |
410 | iph->id = 0; |
411 | iph->frag_off = htons(IP_DF); | |
412 | iph->ttl = 1; | |
413 | iph->protocol = IPPROTO_IGMP; | |
675779ad | 414 | iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ? |
1c8ad5bf | 415 | inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0; |
eb1d1641 HX |
416 | iph->daddr = htonl(INADDR_ALLHOSTS_GROUP); |
417 | ((u8 *)&iph[1])[0] = IPOPT_RA; | |
418 | ((u8 *)&iph[1])[1] = 4; | |
419 | ((u8 *)&iph[1])[2] = 0; | |
420 | ((u8 *)&iph[1])[3] = 0; | |
421 | ip_send_check(iph); | |
422 | skb_put(skb, 24); | |
423 | ||
424 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 425 | *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY; |
eb1d1641 | 426 | |
5e923585 NA |
427 | switch (br->multicast_igmp_version) { |
428 | case 2: | |
429 | ih = igmp_hdr(skb); | |
430 | ih->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
431 | ih->code = (group ? br->multicast_last_member_interval : | |
432 | br->multicast_query_response_interval) / | |
433 | (HZ / IGMP_TIMER_SCALE); | |
434 | ih->group = group; | |
435 | ih->csum = 0; | |
436 | ih->csum = ip_compute_csum((void *)ih, sizeof(*ih)); | |
437 | break; | |
438 | case 3: | |
439 | ihv3 = igmpv3_query_hdr(skb); | |
440 | ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
441 | ihv3->code = (group ? br->multicast_last_member_interval : | |
442 | br->multicast_query_response_interval) / | |
443 | (HZ / IGMP_TIMER_SCALE); | |
444 | ihv3->group = group; | |
445 | ihv3->qqic = br->multicast_query_interval / HZ; | |
446 | ihv3->nsrcs = 0; | |
447 | ihv3->resv = 0; | |
448 | ihv3->suppress = 0; | |
449 | ihv3->qrv = 2; | |
450 | ihv3->csum = 0; | |
451 | ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3)); | |
452 | break; | |
453 | } | |
454 | ||
455 | skb_put(skb, igmp_hdr_size); | |
eb1d1641 HX |
456 | __skb_pull(skb, sizeof(*eth)); |
457 | ||
458 | out: | |
459 | return skb; | |
460 | } | |
461 | ||
dfd56b8b | 462 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 463 | static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
464 | const struct in6_addr *grp, |
465 | u8 *igmp_type) | |
08b202b6 | 466 | { |
aa2ae3e7 NA |
467 | struct mld2_query *mld2q; |
468 | unsigned long interval; | |
08b202b6 YH |
469 | struct ipv6hdr *ip6h; |
470 | struct mld_msg *mldq; | |
aa2ae3e7 NA |
471 | size_t mld_hdr_size; |
472 | struct sk_buff *skb; | |
08b202b6 YH |
473 | struct ethhdr *eth; |
474 | u8 *hopopt; | |
08b202b6 | 475 | |
aa2ae3e7 NA |
476 | mld_hdr_size = sizeof(*mldq); |
477 | if (br->multicast_mld_version == 2) | |
478 | mld_hdr_size = sizeof(*mld2q); | |
08b202b6 | 479 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) + |
aa2ae3e7 | 480 | 8 + mld_hdr_size); |
08b202b6 YH |
481 | if (!skb) |
482 | goto out; | |
483 | ||
484 | skb->protocol = htons(ETH_P_IPV6); | |
485 | ||
486 | /* Ethernet header */ | |
487 | skb_reset_mac_header(skb); | |
488 | eth = eth_hdr(skb); | |
489 | ||
e5a727f6 | 490 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
08b202b6 YH |
491 | eth->h_proto = htons(ETH_P_IPV6); |
492 | skb_put(skb, sizeof(*eth)); | |
493 | ||
494 | /* IPv6 header + HbH option */ | |
495 | skb_set_network_header(skb, skb->len); | |
496 | ip6h = ipv6_hdr(skb); | |
497 | ||
498 | *(__force __be32 *)ip6h = htonl(0x60000000); | |
aa2ae3e7 | 499 | ip6h->payload_len = htons(8 + mld_hdr_size); |
08b202b6 YH |
500 | ip6h->nexthdr = IPPROTO_HOPOPTS; |
501 | ip6h->hop_limit = 1; | |
a7bff75b | 502 | ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1)); |
d1d81d4c UW |
503 | if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, |
504 | &ip6h->saddr)) { | |
505 | kfree_skb(skb); | |
675779ad | 506 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false); |
d1d81d4c UW |
507 | return NULL; |
508 | } | |
0888d5f3 | 509 | |
675779ad | 510 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); |
36cff5a1 | 511 | ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); |
08b202b6 YH |
512 | |
513 | hopopt = (u8 *)(ip6h + 1); | |
514 | hopopt[0] = IPPROTO_ICMPV6; /* next hdr */ | |
515 | hopopt[1] = 0; /* length of HbH */ | |
516 | hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */ | |
517 | hopopt[3] = 2; /* Length of RA Option */ | |
518 | hopopt[4] = 0; /* Type = 0x0000 (MLD) */ | |
519 | hopopt[5] = 0; | |
1de5a71c EZ |
520 | hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */ |
521 | hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */ | |
08b202b6 YH |
522 | |
523 | skb_put(skb, sizeof(*ip6h) + 8); | |
524 | ||
525 | /* ICMPv6 */ | |
526 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 527 | interval = ipv6_addr_any(grp) ? |
32de868c LL |
528 | br->multicast_query_response_interval : |
529 | br->multicast_last_member_interval; | |
1080ab95 | 530 | *igmp_type = ICMPV6_MGM_QUERY; |
aa2ae3e7 NA |
531 | switch (br->multicast_mld_version) { |
532 | case 1: | |
533 | mldq = (struct mld_msg *)icmp6_hdr(skb); | |
534 | mldq->mld_type = ICMPV6_MGM_QUERY; | |
535 | mldq->mld_code = 0; | |
536 | mldq->mld_cksum = 0; | |
537 | mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval)); | |
538 | mldq->mld_reserved = 0; | |
539 | mldq->mld_mca = *grp; | |
540 | mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
541 | sizeof(*mldq), IPPROTO_ICMPV6, | |
542 | csum_partial(mldq, | |
543 | sizeof(*mldq), | |
544 | 0)); | |
545 | break; | |
546 | case 2: | |
547 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
53631a5f | 548 | mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval)); |
aa2ae3e7 NA |
549 | mld2q->mld2q_type = ICMPV6_MGM_QUERY; |
550 | mld2q->mld2q_code = 0; | |
551 | mld2q->mld2q_cksum = 0; | |
552 | mld2q->mld2q_resv1 = 0; | |
553 | mld2q->mld2q_resv2 = 0; | |
554 | mld2q->mld2q_suppress = 0; | |
555 | mld2q->mld2q_qrv = 2; | |
556 | mld2q->mld2q_nsrcs = 0; | |
557 | mld2q->mld2q_qqic = br->multicast_query_interval / HZ; | |
558 | mld2q->mld2q_mca = *grp; | |
559 | mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
560 | sizeof(*mld2q), | |
561 | IPPROTO_ICMPV6, | |
562 | csum_partial(mld2q, | |
563 | sizeof(*mld2q), | |
564 | 0)); | |
565 | break; | |
566 | } | |
567 | skb_put(skb, mld_hdr_size); | |
08b202b6 YH |
568 | |
569 | __skb_pull(skb, sizeof(*eth)); | |
570 | ||
571 | out: | |
572 | return skb; | |
573 | } | |
574 | #endif | |
575 | ||
8ef2a9a5 | 576 | static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
577 | struct br_ip *addr, |
578 | u8 *igmp_type) | |
8ef2a9a5 YH |
579 | { |
580 | switch (addr->proto) { | |
581 | case htons(ETH_P_IP): | |
1080ab95 | 582 | return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type); |
dfd56b8b | 583 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 584 | case htons(ETH_P_IPV6): |
1080ab95 NA |
585 | return br_ip6_multicast_alloc_query(br, &addr->u.ip6, |
586 | igmp_type); | |
08b202b6 | 587 | #endif |
8ef2a9a5 YH |
588 | } |
589 | return NULL; | |
590 | } | |
591 | ||
eb1d1641 | 592 | static struct net_bridge_mdb_entry *br_multicast_get_group( |
8ef2a9a5 YH |
593 | struct net_bridge *br, struct net_bridge_port *port, |
594 | struct br_ip *group, int hash) | |
eb1d1641 | 595 | { |
e8051688 | 596 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 | 597 | struct net_bridge_mdb_entry *mp; |
95c96174 ED |
598 | unsigned int count = 0; |
599 | unsigned int max; | |
eb1d1641 HX |
600 | int elasticity; |
601 | int err; | |
602 | ||
e8051688 | 603 | mdb = rcu_dereference_protected(br->mdb, 1); |
b67bfe0d | 604 | hlist_for_each_entry(mp, &mdb->mhash[hash], hlist[mdb->ver]) { |
eb1d1641 | 605 | count++; |
8ef2a9a5 | 606 | if (unlikely(br_ip_equal(group, &mp->addr))) |
eb1d1641 | 607 | return mp; |
eb1d1641 HX |
608 | } |
609 | ||
610 | elasticity = 0; | |
611 | max = mdb->max; | |
612 | ||
613 | if (unlikely(count > br->hash_elasticity && count)) { | |
614 | if (net_ratelimit()) | |
28a16c97 | 615 | br_info(br, "Multicast hash table " |
616 | "chain limit reached: %s\n", | |
617 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
618 | |
619 | elasticity = br->hash_elasticity; | |
620 | } | |
621 | ||
622 | if (mdb->size >= max) { | |
623 | max *= 2; | |
036be6db TG |
624 | if (unlikely(max > br->hash_max)) { |
625 | br_warn(br, "Multicast hash table maximum of %d " | |
626 | "reached, disabling snooping: %s\n", | |
627 | br->hash_max, | |
628 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
629 | err = -E2BIG; |
630 | disable: | |
13cefad2 | 631 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false); |
eb1d1641 HX |
632 | goto err; |
633 | } | |
634 | } | |
635 | ||
636 | if (max > mdb->max || elasticity) { | |
637 | if (mdb->old) { | |
638 | if (net_ratelimit()) | |
28a16c97 | 639 | br_info(br, "Multicast hash table " |
640 | "on fire: %s\n", | |
641 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
642 | err = -EEXIST; |
643 | goto err; | |
644 | } | |
645 | ||
646 | err = br_mdb_rehash(&br->mdb, max, elasticity); | |
647 | if (err) { | |
28a16c97 | 648 | br_warn(br, "Cannot rehash multicast " |
649 | "hash table, disabling snooping: %s, %d, %d\n", | |
650 | port ? port->dev->name : br->dev->name, | |
651 | mdb->size, err); | |
eb1d1641 HX |
652 | goto disable; |
653 | } | |
654 | ||
655 | err = -EAGAIN; | |
656 | goto err; | |
657 | } | |
658 | ||
659 | return NULL; | |
660 | ||
661 | err: | |
662 | mp = ERR_PTR(err); | |
663 | return mp; | |
664 | } | |
665 | ||
cfd56754 | 666 | struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, |
5e923585 NA |
667 | struct net_bridge_port *p, |
668 | struct br_ip *group) | |
eb1d1641 | 669 | { |
e8051688 | 670 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 HX |
671 | struct net_bridge_mdb_entry *mp; |
672 | int hash; | |
4c0833bc | 673 | int err; |
eb1d1641 | 674 | |
e8051688 | 675 | mdb = rcu_dereference_protected(br->mdb, 1); |
eb1d1641 | 676 | if (!mdb) { |
4c0833bc TK |
677 | err = br_mdb_rehash(&br->mdb, BR_HASH_SIZE, 0); |
678 | if (err) | |
679 | return ERR_PTR(err); | |
eb1d1641 HX |
680 | goto rehash; |
681 | } | |
682 | ||
683 | hash = br_ip_hash(mdb, group); | |
5e923585 | 684 | mp = br_multicast_get_group(br, p, group, hash); |
eb1d1641 HX |
685 | switch (PTR_ERR(mp)) { |
686 | case 0: | |
687 | break; | |
688 | ||
689 | case -EAGAIN: | |
690 | rehash: | |
e8051688 | 691 | mdb = rcu_dereference_protected(br->mdb, 1); |
eb1d1641 HX |
692 | hash = br_ip_hash(mdb, group); |
693 | break; | |
694 | ||
695 | default: | |
696 | goto out; | |
697 | } | |
698 | ||
699 | mp = kzalloc(sizeof(*mp), GFP_ATOMIC); | |
700 | if (unlikely(!mp)) | |
4c0833bc | 701 | return ERR_PTR(-ENOMEM); |
eb1d1641 HX |
702 | |
703 | mp->br = br; | |
8ef2a9a5 | 704 | mp->addr = *group; |
88c1f37f | 705 | timer_setup(&mp->timer, br_multicast_group_expired, 0); |
1faabf2a | 706 | |
eb1d1641 HX |
707 | hlist_add_head_rcu(&mp->hlist[mdb->ver], &mdb->mhash[hash]); |
708 | mdb->size++; | |
709 | ||
710 | out: | |
711 | return mp; | |
712 | } | |
713 | ||
cfd56754 CW |
714 | struct net_bridge_port_group *br_multicast_new_port_group( |
715 | struct net_bridge_port *port, | |
716 | struct br_ip *group, | |
ccb1c31a | 717 | struct net_bridge_port_group __rcu *next, |
6db6f0ea FF |
718 | unsigned char flags, |
719 | const unsigned char *src) | |
cfd56754 CW |
720 | { |
721 | struct net_bridge_port_group *p; | |
722 | ||
723 | p = kzalloc(sizeof(*p), GFP_ATOMIC); | |
724 | if (unlikely(!p)) | |
725 | return NULL; | |
726 | ||
727 | p->addr = *group; | |
728 | p->port = port; | |
9d06b6d8 | 729 | p->flags = flags; |
eca2a43b | 730 | rcu_assign_pointer(p->next, next); |
cfd56754 | 731 | hlist_add_head(&p->mglist, &port->mglist); |
88c1f37f | 732 | timer_setup(&p->timer, br_multicast_port_group_expired, 0); |
6db6f0ea FF |
733 | |
734 | if (src) | |
735 | memcpy(p->eth_addr, src, ETH_ALEN); | |
736 | else | |
737 | memset(p->eth_addr, 0xff, ETH_ALEN); | |
738 | ||
cfd56754 CW |
739 | return p; |
740 | } | |
741 | ||
6db6f0ea FF |
742 | static bool br_port_group_equal(struct net_bridge_port_group *p, |
743 | struct net_bridge_port *port, | |
744 | const unsigned char *src) | |
745 | { | |
746 | if (p->port != port) | |
747 | return false; | |
748 | ||
749 | if (!(port->flags & BR_MULTICAST_TO_UNICAST)) | |
750 | return true; | |
751 | ||
752 | return ether_addr_equal(src, p->eth_addr); | |
753 | } | |
754 | ||
eb1d1641 | 755 | static int br_multicast_add_group(struct net_bridge *br, |
8ef2a9a5 | 756 | struct net_bridge_port *port, |
6db6f0ea FF |
757 | struct br_ip *group, |
758 | const unsigned char *src) | |
eb1d1641 | 759 | { |
e8051688 | 760 | struct net_bridge_port_group __rcu **pp; |
5e923585 NA |
761 | struct net_bridge_port_group *p; |
762 | struct net_bridge_mdb_entry *mp; | |
454594f3 | 763 | unsigned long now = jiffies; |
eb1d1641 HX |
764 | int err; |
765 | ||
eb1d1641 HX |
766 | spin_lock(&br->multicast_lock); |
767 | if (!netif_running(br->dev) || | |
768 | (port && port->state == BR_STATE_DISABLED)) | |
769 | goto out; | |
770 | ||
771 | mp = br_multicast_new_group(br, port, group); | |
772 | err = PTR_ERR(mp); | |
4c0833bc | 773 | if (IS_ERR(mp)) |
eb1d1641 HX |
774 | goto err; |
775 | ||
776 | if (!port) { | |
2a26028d AL |
777 | if (!mp->host_joined) { |
778 | mp->host_joined = true; | |
779 | br_mdb_notify(br->dev, NULL, &mp->addr, RTM_NEWMDB, 0); | |
780 | } | |
454594f3 | 781 | mod_timer(&mp->timer, now + br->multicast_membership_interval); |
eb1d1641 HX |
782 | goto out; |
783 | } | |
784 | ||
e8051688 ED |
785 | for (pp = &mp->ports; |
786 | (p = mlock_dereference(*pp, br)) != NULL; | |
787 | pp = &p->next) { | |
6db6f0ea | 788 | if (br_port_group_equal(p, port, src)) |
454594f3 | 789 | goto found; |
eb1d1641 HX |
790 | if ((unsigned long)p->port < (unsigned long)port) |
791 | break; | |
792 | } | |
793 | ||
6db6f0ea | 794 | p = br_multicast_new_port_group(port, group, *pp, 0, src); |
eb1d1641 HX |
795 | if (unlikely(!p)) |
796 | goto err; | |
eb1d1641 | 797 | rcu_assign_pointer(*pp, p); |
45ebcce5 | 798 | br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0); |
eb1d1641 | 799 | |
454594f3 LL |
800 | found: |
801 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
eb1d1641 HX |
802 | out: |
803 | err = 0; | |
804 | ||
805 | err: | |
806 | spin_unlock(&br->multicast_lock); | |
807 | return err; | |
808 | } | |
809 | ||
8ef2a9a5 YH |
810 | static int br_ip4_multicast_add_group(struct net_bridge *br, |
811 | struct net_bridge_port *port, | |
b0e9a30d | 812 | __be32 group, |
6db6f0ea FF |
813 | __u16 vid, |
814 | const unsigned char *src) | |
8ef2a9a5 YH |
815 | { |
816 | struct br_ip br_group; | |
817 | ||
818 | if (ipv4_is_local_multicast(group)) | |
819 | return 0; | |
820 | ||
821 | br_group.u.ip4 = group; | |
822 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 823 | br_group.vid = vid; |
8ef2a9a5 | 824 | |
6db6f0ea | 825 | return br_multicast_add_group(br, port, &br_group, src); |
8ef2a9a5 YH |
826 | } |
827 | ||
dfd56b8b | 828 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
829 | static int br_ip6_multicast_add_group(struct net_bridge *br, |
830 | struct net_bridge_port *port, | |
b0e9a30d | 831 | const struct in6_addr *group, |
6db6f0ea FF |
832 | __u16 vid, |
833 | const unsigned char *src) | |
08b202b6 YH |
834 | { |
835 | struct br_ip br_group; | |
836 | ||
3c3769e6 | 837 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
838 | return 0; |
839 | ||
4e3fd7a0 | 840 | br_group.u.ip6 = *group; |
9cc6e0c4 | 841 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 842 | br_group.vid = vid; |
08b202b6 | 843 | |
6db6f0ea | 844 | return br_multicast_add_group(br, port, &br_group, src); |
08b202b6 YH |
845 | } |
846 | #endif | |
847 | ||
88c1f37f | 848 | static void br_multicast_router_expired(struct timer_list *t) |
eb1d1641 | 849 | { |
88c1f37f AP |
850 | struct net_bridge_port *port = |
851 | from_timer(port, t, multicast_router_timer); | |
eb1d1641 HX |
852 | struct net_bridge *br = port->br; |
853 | ||
854 | spin_lock(&br->multicast_lock); | |
a55d8246 NA |
855 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
856 | port->multicast_router == MDB_RTR_TYPE_PERM || | |
f12e7d95 | 857 | timer_pending(&port->multicast_router_timer)) |
eb1d1641 HX |
858 | goto out; |
859 | ||
f12e7d95 | 860 | __del_port_router(port); |
eb1d1641 HX |
861 | out: |
862 | spin_unlock(&br->multicast_lock); | |
863 | } | |
864 | ||
77041420 YG |
865 | static void br_mc_router_state_change(struct net_bridge *p, |
866 | bool is_mc_router) | |
867 | { | |
868 | struct switchdev_attr attr = { | |
869 | .orig_dev = p->dev, | |
870 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER, | |
871 | .flags = SWITCHDEV_F_DEFER, | |
872 | .u.mrouter = is_mc_router, | |
873 | }; | |
874 | ||
875 | switchdev_port_attr_set(p->dev, &attr); | |
876 | } | |
877 | ||
88c1f37f | 878 | static void br_multicast_local_router_expired(struct timer_list *t) |
eb1d1641 | 879 | { |
88c1f37f | 880 | struct net_bridge *br = from_timer(br, t, multicast_router_timer); |
77041420 YG |
881 | |
882 | spin_lock(&br->multicast_lock); | |
883 | if (br->multicast_router == MDB_RTR_TYPE_DISABLED || | |
884 | br->multicast_router == MDB_RTR_TYPE_PERM || | |
885 | timer_pending(&br->multicast_router_timer)) | |
886 | goto out; | |
887 | ||
888 | br_mc_router_state_change(br, false); | |
889 | out: | |
890 | spin_unlock(&br->multicast_lock); | |
eb1d1641 HX |
891 | } |
892 | ||
cc0fdd80 | 893 | static void br_multicast_querier_expired(struct net_bridge *br, |
90010b36 | 894 | struct bridge_mcast_own_query *query) |
c83b8fab | 895 | { |
c83b8fab | 896 | spin_lock(&br->multicast_lock); |
13cefad2 | 897 | if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
c83b8fab HX |
898 | goto out; |
899 | ||
cc0fdd80 | 900 | br_multicast_start_querier(br, query); |
c83b8fab HX |
901 | |
902 | out: | |
903 | spin_unlock(&br->multicast_lock); | |
904 | } | |
905 | ||
88c1f37f | 906 | static void br_ip4_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 907 | { |
88c1f37f | 908 | struct net_bridge *br = from_timer(br, t, ip4_other_query.timer); |
cc0fdd80 | 909 | |
90010b36 | 910 | br_multicast_querier_expired(br, &br->ip4_own_query); |
cc0fdd80 LL |
911 | } |
912 | ||
913 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 914 | static void br_ip6_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 915 | { |
88c1f37f | 916 | struct net_bridge *br = from_timer(br, t, ip6_other_query.timer); |
cc0fdd80 | 917 | |
90010b36 | 918 | br_multicast_querier_expired(br, &br->ip6_own_query); |
cc0fdd80 LL |
919 | } |
920 | #endif | |
921 | ||
dc4eb53a LL |
922 | static void br_multicast_select_own_querier(struct net_bridge *br, |
923 | struct br_ip *ip, | |
924 | struct sk_buff *skb) | |
925 | { | |
926 | if (ip->proto == htons(ETH_P_IP)) | |
927 | br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr; | |
928 | #if IS_ENABLED(CONFIG_IPV6) | |
929 | else | |
930 | br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr; | |
931 | #endif | |
932 | } | |
933 | ||
8ef2a9a5 YH |
934 | static void __br_multicast_send_query(struct net_bridge *br, |
935 | struct net_bridge_port *port, | |
936 | struct br_ip *ip) | |
eb1d1641 | 937 | { |
eb1d1641 | 938 | struct sk_buff *skb; |
1080ab95 | 939 | u8 igmp_type; |
eb1d1641 | 940 | |
1080ab95 | 941 | skb = br_multicast_alloc_query(br, ip, &igmp_type); |
eb1d1641 | 942 | if (!skb) |
8ef2a9a5 | 943 | return; |
eb1d1641 HX |
944 | |
945 | if (port) { | |
eb1d1641 | 946 | skb->dev = port->dev; |
a65056ec | 947 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 948 | BR_MCAST_DIR_TX); |
29a26a56 EB |
949 | NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, |
950 | dev_net(port->dev), NULL, skb, NULL, skb->dev, | |
f0b4eece | 951 | br_dev_queue_push_xmit); |
dc4eb53a LL |
952 | } else { |
953 | br_multicast_select_own_querier(br, ip, skb); | |
a65056ec | 954 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 955 | BR_MCAST_DIR_RX); |
eb1d1641 | 956 | netif_rx(skb); |
dc4eb53a | 957 | } |
8ef2a9a5 YH |
958 | } |
959 | ||
960 | static void br_multicast_send_query(struct net_bridge *br, | |
cc0fdd80 | 961 | struct net_bridge_port *port, |
90010b36 | 962 | struct bridge_mcast_own_query *own_query) |
8ef2a9a5 | 963 | { |
90010b36 | 964 | struct bridge_mcast_other_query *other_query = NULL; |
5e923585 NA |
965 | struct br_ip br_group; |
966 | unsigned long time; | |
8ef2a9a5 | 967 | |
13cefad2 NA |
968 | if (!netif_running(br->dev) || |
969 | !br_opt_get(br, BROPT_MULTICAST_ENABLED) || | |
675779ad | 970 | !br_opt_get(br, BROPT_MULTICAST_QUERIER)) |
8ef2a9a5 YH |
971 | return; |
972 | ||
08b202b6 YH |
973 | memset(&br_group.u, 0, sizeof(br_group.u)); |
974 | ||
90010b36 LL |
975 | if (port ? (own_query == &port->ip4_own_query) : |
976 | (own_query == &br->ip4_own_query)) { | |
977 | other_query = &br->ip4_other_query; | |
cc0fdd80 | 978 | br_group.proto = htons(ETH_P_IP); |
dfd56b8b | 979 | #if IS_ENABLED(CONFIG_IPV6) |
cc0fdd80 | 980 | } else { |
90010b36 | 981 | other_query = &br->ip6_other_query; |
cc0fdd80 | 982 | br_group.proto = htons(ETH_P_IPV6); |
08b202b6 | 983 | #endif |
cc0fdd80 LL |
984 | } |
985 | ||
90010b36 | 986 | if (!other_query || timer_pending(&other_query->timer)) |
cc0fdd80 LL |
987 | return; |
988 | ||
989 | __br_multicast_send_query(br, port, &br_group); | |
eb1d1641 | 990 | |
eb1d1641 | 991 | time = jiffies; |
90010b36 | 992 | time += own_query->startup_sent < br->multicast_startup_query_count ? |
eb1d1641 HX |
993 | br->multicast_startup_query_interval : |
994 | br->multicast_query_interval; | |
90010b36 | 995 | mod_timer(&own_query->timer, time); |
eb1d1641 HX |
996 | } |
997 | ||
90010b36 LL |
998 | static void |
999 | br_multicast_port_query_expired(struct net_bridge_port *port, | |
1000 | struct bridge_mcast_own_query *query) | |
eb1d1641 | 1001 | { |
eb1d1641 HX |
1002 | struct net_bridge *br = port->br; |
1003 | ||
1004 | spin_lock(&br->multicast_lock); | |
02a780c0 DC |
1005 | if (port->state == BR_STATE_DISABLED || |
1006 | port->state == BR_STATE_BLOCKING) | |
eb1d1641 HX |
1007 | goto out; |
1008 | ||
cc0fdd80 LL |
1009 | if (query->startup_sent < br->multicast_startup_query_count) |
1010 | query->startup_sent++; | |
eb1d1641 | 1011 | |
cc0fdd80 | 1012 | br_multicast_send_query(port->br, port, query); |
eb1d1641 HX |
1013 | |
1014 | out: | |
1015 | spin_unlock(&br->multicast_lock); | |
1016 | } | |
1017 | ||
88c1f37f | 1018 | static void br_ip4_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 1019 | { |
88c1f37f | 1020 | struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer); |
cc0fdd80 | 1021 | |
90010b36 | 1022 | br_multicast_port_query_expired(port, &port->ip4_own_query); |
cc0fdd80 LL |
1023 | } |
1024 | ||
1025 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 1026 | static void br_ip6_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 1027 | { |
88c1f37f | 1028 | struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer); |
cc0fdd80 | 1029 | |
90010b36 | 1030 | br_multicast_port_query_expired(port, &port->ip6_own_query); |
cc0fdd80 LL |
1031 | } |
1032 | #endif | |
1033 | ||
147c1e9b NF |
1034 | static void br_mc_disabled_update(struct net_device *dev, bool value) |
1035 | { | |
1036 | struct switchdev_attr attr = { | |
1037 | .orig_dev = dev, | |
1038 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED, | |
1039 | .flags = SWITCHDEV_F_DEFER, | |
13cefad2 | 1040 | .u.mc_disabled = !value, |
147c1e9b NF |
1041 | }; |
1042 | ||
1043 | switchdev_port_attr_set(dev, &attr); | |
1044 | } | |
1045 | ||
1080ab95 | 1046 | int br_multicast_add_port(struct net_bridge_port *port) |
eb1d1641 | 1047 | { |
7f0aec7a | 1048 | port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
eb1d1641 | 1049 | |
88c1f37f AP |
1050 | timer_setup(&port->multicast_router_timer, |
1051 | br_multicast_router_expired, 0); | |
1052 | timer_setup(&port->ip4_own_query.timer, | |
1053 | br_ip4_multicast_port_query_expired, 0); | |
cc0fdd80 | 1054 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f AP |
1055 | timer_setup(&port->ip6_own_query.timer, |
1056 | br_ip6_multicast_port_query_expired, 0); | |
cc0fdd80 | 1057 | #endif |
13cefad2 NA |
1058 | br_mc_disabled_update(port->dev, |
1059 | br_opt_get(port->br, BROPT_MULTICAST_ENABLED)); | |
147c1e9b | 1060 | |
1080ab95 NA |
1061 | port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); |
1062 | if (!port->mcast_stats) | |
1063 | return -ENOMEM; | |
1064 | ||
1065 | return 0; | |
eb1d1641 HX |
1066 | } |
1067 | ||
1068 | void br_multicast_del_port(struct net_bridge_port *port) | |
1069 | { | |
e10177ab SA |
1070 | struct net_bridge *br = port->br; |
1071 | struct net_bridge_port_group *pg; | |
1072 | struct hlist_node *n; | |
1073 | ||
1074 | /* Take care of the remaining groups, only perm ones should be left */ | |
1075 | spin_lock_bh(&br->multicast_lock); | |
1076 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) | |
1077 | br_multicast_del_pg(br, pg); | |
1078 | spin_unlock_bh(&br->multicast_lock); | |
eb1d1641 | 1079 | del_timer_sync(&port->multicast_router_timer); |
1080ab95 | 1080 | free_percpu(port->mcast_stats); |
eb1d1641 HX |
1081 | } |
1082 | ||
90010b36 | 1083 | static void br_multicast_enable(struct bridge_mcast_own_query *query) |
561f1103 | 1084 | { |
cc0fdd80 | 1085 | query->startup_sent = 0; |
561f1103 | 1086 | |
cc0fdd80 LL |
1087 | if (try_to_del_timer_sync(&query->timer) >= 0 || |
1088 | del_timer(&query->timer)) | |
1089 | mod_timer(&query->timer, jiffies); | |
561f1103 HX |
1090 | } |
1091 | ||
7cb3f921 | 1092 | static void __br_multicast_enable_port(struct net_bridge_port *port) |
eb1d1641 HX |
1093 | { |
1094 | struct net_bridge *br = port->br; | |
1095 | ||
13cefad2 | 1096 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev)) |
7cb3f921 | 1097 | return; |
eb1d1641 | 1098 | |
90010b36 | 1099 | br_multicast_enable(&port->ip4_own_query); |
cc0fdd80 | 1100 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1101 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 1102 | #endif |
7f0aec7a NA |
1103 | if (port->multicast_router == MDB_RTR_TYPE_PERM && |
1104 | hlist_unhashed(&port->rlist)) | |
754bc547 | 1105 | br_multicast_add_router(br, port); |
7cb3f921 | 1106 | } |
eb1d1641 | 1107 | |
7cb3f921 NA |
1108 | void br_multicast_enable_port(struct net_bridge_port *port) |
1109 | { | |
1110 | struct net_bridge *br = port->br; | |
1111 | ||
1112 | spin_lock(&br->multicast_lock); | |
1113 | __br_multicast_enable_port(port); | |
eb1d1641 HX |
1114 | spin_unlock(&br->multicast_lock); |
1115 | } | |
1116 | ||
1117 | void br_multicast_disable_port(struct net_bridge_port *port) | |
1118 | { | |
1119 | struct net_bridge *br = port->br; | |
1120 | struct net_bridge_port_group *pg; | |
b67bfe0d | 1121 | struct hlist_node *n; |
eb1d1641 HX |
1122 | |
1123 | spin_lock(&br->multicast_lock); | |
b67bfe0d | 1124 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) |
9d06b6d8 | 1125 | if (!(pg->flags & MDB_PG_FLAGS_PERMANENT)) |
e10177ab | 1126 | br_multicast_del_pg(br, pg); |
eb1d1641 | 1127 | |
f12e7d95 NF |
1128 | __del_port_router(port); |
1129 | ||
eb1d1641 | 1130 | del_timer(&port->multicast_router_timer); |
90010b36 | 1131 | del_timer(&port->ip4_own_query.timer); |
cc0fdd80 | 1132 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1133 | del_timer(&port->ip6_own_query.timer); |
cc0fdd80 | 1134 | #endif |
eb1d1641 HX |
1135 | spin_unlock(&br->multicast_lock); |
1136 | } | |
1137 | ||
8ef2a9a5 YH |
1138 | static int br_ip4_multicast_igmp3_report(struct net_bridge *br, |
1139 | struct net_bridge_port *port, | |
06499098 VY |
1140 | struct sk_buff *skb, |
1141 | u16 vid) | |
eb1d1641 | 1142 | { |
6db6f0ea | 1143 | const unsigned char *src; |
eb1d1641 HX |
1144 | struct igmpv3_report *ih; |
1145 | struct igmpv3_grec *grec; | |
1146 | int i; | |
1147 | int len; | |
1148 | int num; | |
1149 | int type; | |
1150 | int err = 0; | |
1151 | __be32 group; | |
1152 | ||
eb1d1641 HX |
1153 | ih = igmpv3_report_hdr(skb); |
1154 | num = ntohs(ih->ngrec); | |
c2d4fbd2 | 1155 | len = skb_transport_offset(skb) + sizeof(*ih); |
eb1d1641 HX |
1156 | |
1157 | for (i = 0; i < num; i++) { | |
1158 | len += sizeof(*grec); | |
1159 | if (!pskb_may_pull(skb, len)) | |
1160 | return -EINVAL; | |
1161 | ||
fd218cf9 | 1162 | grec = (void *)(skb->data + len - sizeof(*grec)); |
eb1d1641 HX |
1163 | group = grec->grec_mca; |
1164 | type = grec->grec_type; | |
1165 | ||
8eabf95c | 1166 | len += ntohs(grec->grec_nsrcs) * 4; |
eb1d1641 HX |
1167 | if (!pskb_may_pull(skb, len)) |
1168 | return -EINVAL; | |
1169 | ||
1170 | /* We treat this as an IGMPv2 report for now. */ | |
1171 | switch (type) { | |
1172 | case IGMPV3_MODE_IS_INCLUDE: | |
1173 | case IGMPV3_MODE_IS_EXCLUDE: | |
1174 | case IGMPV3_CHANGE_TO_INCLUDE: | |
1175 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
1176 | case IGMPV3_ALLOW_NEW_SOURCES: | |
1177 | case IGMPV3_BLOCK_OLD_SOURCES: | |
1178 | break; | |
1179 | ||
1180 | default: | |
1181 | continue; | |
1182 | } | |
1183 | ||
6db6f0ea | 1184 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
1185 | if ((type == IGMPV3_CHANGE_TO_INCLUDE || |
1186 | type == IGMPV3_MODE_IS_INCLUDE) && | |
1187 | ntohs(grec->grec_nsrcs) == 0) { | |
6db6f0ea | 1188 | br_ip4_multicast_leave_group(br, port, group, vid, src); |
bc8c20ac | 1189 | } else { |
6db6f0ea FF |
1190 | err = br_ip4_multicast_add_group(br, port, group, vid, |
1191 | src); | |
bc8c20ac SA |
1192 | if (err) |
1193 | break; | |
1194 | } | |
eb1d1641 HX |
1195 | } |
1196 | ||
1197 | return err; | |
1198 | } | |
1199 | ||
dfd56b8b | 1200 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1201 | static int br_ip6_multicast_mld2_report(struct net_bridge *br, |
1202 | struct net_bridge_port *port, | |
06499098 VY |
1203 | struct sk_buff *skb, |
1204 | u16 vid) | |
08b202b6 | 1205 | { |
6db6f0ea | 1206 | const unsigned char *src; |
08b202b6 YH |
1207 | struct icmp6hdr *icmp6h; |
1208 | struct mld2_grec *grec; | |
1209 | int i; | |
1210 | int len; | |
1211 | int num; | |
1212 | int err = 0; | |
1213 | ||
1214 | if (!pskb_may_pull(skb, sizeof(*icmp6h))) | |
1215 | return -EINVAL; | |
1216 | ||
1217 | icmp6h = icmp6_hdr(skb); | |
1218 | num = ntohs(icmp6h->icmp6_dataun.un_data16[1]); | |
c2d4fbd2 | 1219 | len = skb_transport_offset(skb) + sizeof(*icmp6h); |
08b202b6 YH |
1220 | |
1221 | for (i = 0; i < num; i++) { | |
1222 | __be16 *nsrcs, _nsrcs; | |
1223 | ||
1224 | nsrcs = skb_header_pointer(skb, | |
1225 | len + offsetof(struct mld2_grec, | |
649e984d | 1226 | grec_nsrcs), |
08b202b6 YH |
1227 | sizeof(_nsrcs), &_nsrcs); |
1228 | if (!nsrcs) | |
1229 | return -EINVAL; | |
1230 | ||
1231 | if (!pskb_may_pull(skb, | |
1232 | len + sizeof(*grec) + | |
d41db9f3 | 1233 | sizeof(struct in6_addr) * ntohs(*nsrcs))) |
08b202b6 YH |
1234 | return -EINVAL; |
1235 | ||
1236 | grec = (struct mld2_grec *)(skb->data + len); | |
d41db9f3 LL |
1237 | len += sizeof(*grec) + |
1238 | sizeof(struct in6_addr) * ntohs(*nsrcs); | |
08b202b6 YH |
1239 | |
1240 | /* We treat these as MLDv1 reports for now. */ | |
1241 | switch (grec->grec_type) { | |
1242 | case MLD2_MODE_IS_INCLUDE: | |
1243 | case MLD2_MODE_IS_EXCLUDE: | |
1244 | case MLD2_CHANGE_TO_INCLUDE: | |
1245 | case MLD2_CHANGE_TO_EXCLUDE: | |
1246 | case MLD2_ALLOW_NEW_SOURCES: | |
1247 | case MLD2_BLOCK_OLD_SOURCES: | |
1248 | break; | |
1249 | ||
1250 | default: | |
1251 | continue; | |
1252 | } | |
1253 | ||
6db6f0ea | 1254 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
1255 | if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE || |
1256 | grec->grec_type == MLD2_MODE_IS_INCLUDE) && | |
1257 | ntohs(*nsrcs) == 0) { | |
1258 | br_ip6_multicast_leave_group(br, port, &grec->grec_mca, | |
6db6f0ea | 1259 | vid, src); |
bc8c20ac SA |
1260 | } else { |
1261 | err = br_ip6_multicast_add_group(br, port, | |
6db6f0ea FF |
1262 | &grec->grec_mca, vid, |
1263 | src); | |
9264251e | 1264 | if (err) |
bc8c20ac SA |
1265 | break; |
1266 | } | |
08b202b6 YH |
1267 | } |
1268 | ||
1269 | return err; | |
1270 | } | |
1271 | #endif | |
1272 | ||
dc4eb53a | 1273 | static bool br_ip4_multicast_select_querier(struct net_bridge *br, |
2cd41431 | 1274 | struct net_bridge_port *port, |
dc4eb53a LL |
1275 | __be32 saddr) |
1276 | { | |
1277 | if (!timer_pending(&br->ip4_own_query.timer) && | |
1278 | !timer_pending(&br->ip4_other_query.timer)) | |
1279 | goto update; | |
1280 | ||
1281 | if (!br->ip4_querier.addr.u.ip4) | |
1282 | goto update; | |
1283 | ||
1284 | if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4)) | |
1285 | goto update; | |
1286 | ||
1287 | return false; | |
1288 | ||
1289 | update: | |
1290 | br->ip4_querier.addr.u.ip4 = saddr; | |
1291 | ||
2cd41431 LL |
1292 | /* update protected by general multicast_lock by caller */ |
1293 | rcu_assign_pointer(br->ip4_querier.port, port); | |
1294 | ||
dc4eb53a LL |
1295 | return true; |
1296 | } | |
1297 | ||
1298 | #if IS_ENABLED(CONFIG_IPV6) | |
1299 | static bool br_ip6_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1300 | struct net_bridge_port *port, |
dc4eb53a LL |
1301 | struct in6_addr *saddr) |
1302 | { | |
1303 | if (!timer_pending(&br->ip6_own_query.timer) && | |
1304 | !timer_pending(&br->ip6_other_query.timer)) | |
1305 | goto update; | |
1306 | ||
1307 | if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0) | |
1308 | goto update; | |
1309 | ||
1310 | return false; | |
1311 | ||
1312 | update: | |
1313 | br->ip6_querier.addr.u.ip6 = *saddr; | |
1314 | ||
2cd41431 LL |
1315 | /* update protected by general multicast_lock by caller */ |
1316 | rcu_assign_pointer(br->ip6_querier.port, port); | |
1317 | ||
dc4eb53a LL |
1318 | return true; |
1319 | } | |
1320 | #endif | |
1321 | ||
1322 | static bool br_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1323 | struct net_bridge_port *port, |
dc4eb53a LL |
1324 | struct br_ip *saddr) |
1325 | { | |
1326 | switch (saddr->proto) { | |
1327 | case htons(ETH_P_IP): | |
2cd41431 | 1328 | return br_ip4_multicast_select_querier(br, port, saddr->u.ip4); |
dc4eb53a LL |
1329 | #if IS_ENABLED(CONFIG_IPV6) |
1330 | case htons(ETH_P_IPV6): | |
2cd41431 | 1331 | return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6); |
dc4eb53a LL |
1332 | #endif |
1333 | } | |
1334 | ||
1335 | return false; | |
1336 | } | |
1337 | ||
cc0fdd80 | 1338 | static void |
90010b36 LL |
1339 | br_multicast_update_query_timer(struct net_bridge *br, |
1340 | struct bridge_mcast_other_query *query, | |
1341 | unsigned long max_delay) | |
b00589af | 1342 | { |
90010b36 LL |
1343 | if (!timer_pending(&query->timer)) |
1344 | query->delay_time = jiffies + max_delay; | |
b00589af | 1345 | |
90010b36 | 1346 | mod_timer(&query->timer, jiffies + br->multicast_querier_interval); |
b00589af LL |
1347 | } |
1348 | ||
6d549648 NF |
1349 | static void br_port_mc_router_state_change(struct net_bridge_port *p, |
1350 | bool is_mc_router) | |
1351 | { | |
1352 | struct switchdev_attr attr = { | |
1353 | .orig_dev = p->dev, | |
1354 | .id = SWITCHDEV_ATTR_ID_PORT_MROUTER, | |
1355 | .flags = SWITCHDEV_F_DEFER, | |
1356 | .u.mrouter = is_mc_router, | |
1357 | }; | |
1358 | ||
1359 | switchdev_port_attr_set(p->dev, &attr); | |
1360 | } | |
1361 | ||
7e80c124 | 1362 | /* |
7c77602f | 1363 | * Add port to router_list |
7e80c124 | 1364 | * list is maintained ordered by pointer value |
1365 | * and locked by br->multicast_lock and RCU | |
1366 | */ | |
0909e117 HX |
1367 | static void br_multicast_add_router(struct net_bridge *br, |
1368 | struct net_bridge_port *port) | |
1369 | { | |
dcdca2c4 | 1370 | struct net_bridge_port *p; |
b67bfe0d | 1371 | struct hlist_node *slot = NULL; |
dcdca2c4 | 1372 | |
1a040eac NA |
1373 | if (!hlist_unhashed(&port->rlist)) |
1374 | return; | |
1375 | ||
b67bfe0d | 1376 | hlist_for_each_entry(p, &br->router_list, rlist) { |
7e80c124 | 1377 | if ((unsigned long) port >= (unsigned long) p) |
1378 | break; | |
b67bfe0d | 1379 | slot = &p->rlist; |
dcdca2c4 | 1380 | } |
1381 | ||
7e80c124 | 1382 | if (slot) |
1d023284 | 1383 | hlist_add_behind_rcu(&port->rlist, slot); |
dcdca2c4 | 1384 | else |
1385 | hlist_add_head_rcu(&port->rlist, &br->router_list); | |
949f1e39 | 1386 | br_rtr_notify(br->dev, port, RTM_NEWMDB); |
6d549648 | 1387 | br_port_mc_router_state_change(port, true); |
0909e117 HX |
1388 | } |
1389 | ||
eb1d1641 HX |
1390 | static void br_multicast_mark_router(struct net_bridge *br, |
1391 | struct net_bridge_port *port) | |
1392 | { | |
1393 | unsigned long now = jiffies; | |
eb1d1641 HX |
1394 | |
1395 | if (!port) { | |
77041420 YG |
1396 | if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) { |
1397 | if (!timer_pending(&br->multicast_router_timer)) | |
1398 | br_mc_router_state_change(br, true); | |
eb1d1641 HX |
1399 | mod_timer(&br->multicast_router_timer, |
1400 | now + br->multicast_querier_interval); | |
77041420 | 1401 | } |
eb1d1641 HX |
1402 | return; |
1403 | } | |
1404 | ||
a55d8246 NA |
1405 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
1406 | port->multicast_router == MDB_RTR_TYPE_PERM) | |
eb1d1641 HX |
1407 | return; |
1408 | ||
0909e117 | 1409 | br_multicast_add_router(br, port); |
eb1d1641 | 1410 | |
eb1d1641 HX |
1411 | mod_timer(&port->multicast_router_timer, |
1412 | now + br->multicast_querier_interval); | |
1413 | } | |
1414 | ||
1415 | static void br_multicast_query_received(struct net_bridge *br, | |
1416 | struct net_bridge_port *port, | |
90010b36 | 1417 | struct bridge_mcast_other_query *query, |
dc4eb53a | 1418 | struct br_ip *saddr, |
b00589af | 1419 | unsigned long max_delay) |
eb1d1641 | 1420 | { |
2cd41431 | 1421 | if (!br_multicast_select_querier(br, port, saddr)) |
eb1d1641 HX |
1422 | return; |
1423 | ||
dc4eb53a | 1424 | br_multicast_update_query_timer(br, query, max_delay); |
5a2de63f HL |
1425 | |
1426 | /* Based on RFC4541, section 2.1.1 IGMP Forwarding Rules, | |
1427 | * the arrival port for IGMP Queries where the source address | |
1428 | * is 0.0.0.0 should not be added to router port list. | |
1429 | */ | |
1430 | if ((saddr->proto == htons(ETH_P_IP) && saddr->u.ip4) || | |
1431 | (saddr->proto == htons(ETH_P_IPV6) && | |
1432 | !ipv6_addr_any(&saddr->u.ip6))) | |
1433 | br_multicast_mark_router(br, port); | |
eb1d1641 HX |
1434 | } |
1435 | ||
9c2e955c | 1436 | static void br_ip4_multicast_query(struct net_bridge *br, |
1437 | struct net_bridge_port *port, | |
1438 | struct sk_buff *skb, | |
1439 | u16 vid) | |
eb1d1641 | 1440 | { |
b71d1d42 | 1441 | const struct iphdr *iph = ip_hdr(skb); |
eb1d1641 HX |
1442 | struct igmphdr *ih = igmp_hdr(skb); |
1443 | struct net_bridge_mdb_entry *mp; | |
1444 | struct igmpv3_query *ih3; | |
1445 | struct net_bridge_port_group *p; | |
e8051688 | 1446 | struct net_bridge_port_group __rcu **pp; |
dc4eb53a | 1447 | struct br_ip saddr; |
eb1d1641 HX |
1448 | unsigned long max_delay; |
1449 | unsigned long now = jiffies; | |
856ce5d0 | 1450 | unsigned int offset = skb_transport_offset(skb); |
eb1d1641 HX |
1451 | __be32 group; |
1452 | ||
1453 | spin_lock(&br->multicast_lock); | |
1454 | if (!netif_running(br->dev) || | |
1455 | (port && port->state == BR_STATE_DISABLED)) | |
1456 | goto out; | |
1457 | ||
eb1d1641 HX |
1458 | group = ih->group; |
1459 | ||
856ce5d0 | 1460 | if (skb->len == offset + sizeof(*ih)) { |
eb1d1641 HX |
1461 | max_delay = ih->code * (HZ / IGMP_TIMER_SCALE); |
1462 | ||
1463 | if (!max_delay) { | |
1464 | max_delay = 10 * HZ; | |
1465 | group = 0; | |
1466 | } | |
856ce5d0 | 1467 | } else if (skb->len >= offset + sizeof(*ih3)) { |
eb1d1641 HX |
1468 | ih3 = igmpv3_query_hdr(skb); |
1469 | if (ih3->nsrcs) | |
bec68ff1 | 1470 | goto out; |
eb1d1641 | 1471 | |
0ba8c9ec YH |
1472 | max_delay = ih3->code ? |
1473 | IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1; | |
9afd85c9 | 1474 | } else { |
9ed973cc LL |
1475 | goto out; |
1476 | } | |
1477 | ||
dc4eb53a LL |
1478 | if (!group) { |
1479 | saddr.proto = htons(ETH_P_IP); | |
1480 | saddr.u.ip4 = iph->saddr; | |
b00589af | 1481 | |
dc4eb53a LL |
1482 | br_multicast_query_received(br, port, &br->ip4_other_query, |
1483 | &saddr, max_delay); | |
eb1d1641 | 1484 | goto out; |
dc4eb53a | 1485 | } |
eb1d1641 | 1486 | |
b0e9a30d | 1487 | mp = br_mdb_ip4_get(mlock_dereference(br->mdb, br), group, vid); |
eb1d1641 HX |
1488 | if (!mp) |
1489 | goto out; | |
1490 | ||
1491 | max_delay *= br->multicast_last_member_count; | |
1492 | ||
ff0fd34e | 1493 | if (mp->host_joined && |
eb1d1641 HX |
1494 | (timer_pending(&mp->timer) ? |
1495 | time_after(mp->timer.expires, now + max_delay) : | |
1496 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1497 | mod_timer(&mp->timer, now + max_delay); | |
1498 | ||
e8051688 ED |
1499 | for (pp = &mp->ports; |
1500 | (p = mlock_dereference(*pp, br)) != NULL; | |
1501 | pp = &p->next) { | |
eb1d1641 HX |
1502 | if (timer_pending(&p->timer) ? |
1503 | time_after(p->timer.expires, now + max_delay) : | |
1504 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1505 | mod_timer(&p->timer, now + max_delay); |
eb1d1641 HX |
1506 | } |
1507 | ||
1508 | out: | |
1509 | spin_unlock(&br->multicast_lock); | |
eb1d1641 HX |
1510 | } |
1511 | ||
dfd56b8b | 1512 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1513 | static int br_ip6_multicast_query(struct net_bridge *br, |
1514 | struct net_bridge_port *port, | |
06499098 VY |
1515 | struct sk_buff *skb, |
1516 | u16 vid) | |
08b202b6 | 1517 | { |
b71d1d42 | 1518 | const struct ipv6hdr *ip6h = ipv6_hdr(skb); |
eca2a43b | 1519 | struct mld_msg *mld; |
08b202b6 YH |
1520 | struct net_bridge_mdb_entry *mp; |
1521 | struct mld2_query *mld2q; | |
e8051688 ED |
1522 | struct net_bridge_port_group *p; |
1523 | struct net_bridge_port_group __rcu **pp; | |
dc4eb53a | 1524 | struct br_ip saddr; |
08b202b6 YH |
1525 | unsigned long max_delay; |
1526 | unsigned long now = jiffies; | |
856ce5d0 | 1527 | unsigned int offset = skb_transport_offset(skb); |
b71d1d42 | 1528 | const struct in6_addr *group = NULL; |
9ed973cc | 1529 | bool is_general_query; |
08b202b6 YH |
1530 | int err = 0; |
1531 | ||
1532 | spin_lock(&br->multicast_lock); | |
1533 | if (!netif_running(br->dev) || | |
1534 | (port && port->state == BR_STATE_DISABLED)) | |
1535 | goto out; | |
1536 | ||
856ce5d0 LL |
1537 | if (skb->len == offset + sizeof(*mld)) { |
1538 | if (!pskb_may_pull(skb, offset + sizeof(*mld))) { | |
08b202b6 YH |
1539 | err = -EINVAL; |
1540 | goto out; | |
1541 | } | |
1542 | mld = (struct mld_msg *) icmp6_hdr(skb); | |
4715213d | 1543 | max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay)); |
08b202b6 YH |
1544 | if (max_delay) |
1545 | group = &mld->mld_mca; | |
248ba8ec | 1546 | } else { |
856ce5d0 | 1547 | if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) { |
08b202b6 YH |
1548 | err = -EINVAL; |
1549 | goto out; | |
1550 | } | |
1551 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
1552 | if (!mld2q->mld2q_nsrcs) | |
1553 | group = &mld2q->mld2q_mca; | |
e3f5b170 DB |
1554 | |
1555 | max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL); | |
08b202b6 YH |
1556 | } |
1557 | ||
9ed973cc LL |
1558 | is_general_query = group && ipv6_addr_any(group); |
1559 | ||
dc4eb53a LL |
1560 | if (is_general_query) { |
1561 | saddr.proto = htons(ETH_P_IPV6); | |
1562 | saddr.u.ip6 = ip6h->saddr; | |
b00589af | 1563 | |
dc4eb53a LL |
1564 | br_multicast_query_received(br, port, &br->ip6_other_query, |
1565 | &saddr, max_delay); | |
08b202b6 | 1566 | goto out; |
6c03ee8b LL |
1567 | } else if (!group) { |
1568 | goto out; | |
dc4eb53a | 1569 | } |
08b202b6 | 1570 | |
b0e9a30d | 1571 | mp = br_mdb_ip6_get(mlock_dereference(br->mdb, br), group, vid); |
08b202b6 YH |
1572 | if (!mp) |
1573 | goto out; | |
1574 | ||
1575 | max_delay *= br->multicast_last_member_count; | |
ff0fd34e | 1576 | if (mp->host_joined && |
08b202b6 YH |
1577 | (timer_pending(&mp->timer) ? |
1578 | time_after(mp->timer.expires, now + max_delay) : | |
1579 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1580 | mod_timer(&mp->timer, now + max_delay); | |
1581 | ||
e8051688 ED |
1582 | for (pp = &mp->ports; |
1583 | (p = mlock_dereference(*pp, br)) != NULL; | |
1584 | pp = &p->next) { | |
08b202b6 YH |
1585 | if (timer_pending(&p->timer) ? |
1586 | time_after(p->timer.expires, now + max_delay) : | |
1587 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1588 | mod_timer(&p->timer, now + max_delay); |
08b202b6 YH |
1589 | } |
1590 | ||
1591 | out: | |
1592 | spin_unlock(&br->multicast_lock); | |
1593 | return err; | |
1594 | } | |
1595 | #endif | |
1596 | ||
90010b36 LL |
1597 | static void |
1598 | br_multicast_leave_group(struct net_bridge *br, | |
1599 | struct net_bridge_port *port, | |
1600 | struct br_ip *group, | |
1601 | struct bridge_mcast_other_query *other_query, | |
6db6f0ea FF |
1602 | struct bridge_mcast_own_query *own_query, |
1603 | const unsigned char *src) | |
eb1d1641 HX |
1604 | { |
1605 | struct net_bridge_mdb_htable *mdb; | |
1606 | struct net_bridge_mdb_entry *mp; | |
1607 | struct net_bridge_port_group *p; | |
1608 | unsigned long now; | |
1609 | unsigned long time; | |
1610 | ||
eb1d1641 HX |
1611 | spin_lock(&br->multicast_lock); |
1612 | if (!netif_running(br->dev) || | |
544586f7 | 1613 | (port && port->state == BR_STATE_DISABLED)) |
eb1d1641 HX |
1614 | goto out; |
1615 | ||
e8051688 | 1616 | mdb = mlock_dereference(br->mdb, br); |
eb1d1641 HX |
1617 | mp = br_mdb_ip_get(mdb, group); |
1618 | if (!mp) | |
1619 | goto out; | |
1620 | ||
544586f7 SA |
1621 | if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) { |
1622 | struct net_bridge_port_group __rcu **pp; | |
1623 | ||
1624 | for (pp = &mp->ports; | |
1625 | (p = mlock_dereference(*pp, br)) != NULL; | |
1626 | pp = &p->next) { | |
6db6f0ea | 1627 | if (!br_port_group_equal(p, port, src)) |
544586f7 SA |
1628 | continue; |
1629 | ||
1630 | rcu_assign_pointer(*pp, p->next); | |
1631 | hlist_del_init(&p->mglist); | |
1632 | del_timer(&p->timer); | |
1633 | call_rcu_bh(&p->rcu, br_multicast_free_pg); | |
45ebcce5 ER |
1634 | br_mdb_notify(br->dev, port, group, RTM_DELMDB, |
1635 | p->flags); | |
544586f7 | 1636 | |
ff0fd34e | 1637 | if (!mp->ports && !mp->host_joined && |
544586f7 SA |
1638 | netif_running(br->dev)) |
1639 | mod_timer(&mp->timer, jiffies); | |
1640 | } | |
1641 | goto out; | |
1642 | } | |
1643 | ||
1644 | if (timer_pending(&other_query->timer)) | |
1645 | goto out; | |
1646 | ||
675779ad | 1647 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { |
6b7df111 CW |
1648 | __br_multicast_send_query(br, port, &mp->addr); |
1649 | ||
1650 | time = jiffies + br->multicast_last_member_count * | |
1651 | br->multicast_last_member_interval; | |
cc0fdd80 | 1652 | |
90010b36 | 1653 | mod_timer(&own_query->timer, time); |
6b7df111 CW |
1654 | |
1655 | for (p = mlock_dereference(mp->ports, br); | |
1656 | p != NULL; | |
1657 | p = mlock_dereference(p->next, br)) { | |
6db6f0ea | 1658 | if (!br_port_group_equal(p, port, src)) |
6b7df111 CW |
1659 | continue; |
1660 | ||
1661 | if (!hlist_unhashed(&p->mglist) && | |
1662 | (timer_pending(&p->timer) ? | |
1663 | time_after(p->timer.expires, time) : | |
1664 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1665 | mod_timer(&p->timer, time); | |
1666 | } | |
1667 | ||
1668 | break; | |
1669 | } | |
1670 | } | |
1671 | ||
eb1d1641 HX |
1672 | now = jiffies; |
1673 | time = now + br->multicast_last_member_count * | |
1674 | br->multicast_last_member_interval; | |
1675 | ||
1676 | if (!port) { | |
ff0fd34e | 1677 | if (mp->host_joined && |
eb1d1641 HX |
1678 | (timer_pending(&mp->timer) ? |
1679 | time_after(mp->timer.expires, time) : | |
1680 | try_to_del_timer_sync(&mp->timer) >= 0)) { | |
1681 | mod_timer(&mp->timer, time); | |
eb1d1641 | 1682 | } |
454594f3 LL |
1683 | |
1684 | goto out; | |
1685 | } | |
1686 | ||
1687 | for (p = mlock_dereference(mp->ports, br); | |
1688 | p != NULL; | |
1689 | p = mlock_dereference(p->next, br)) { | |
1690 | if (p->port != port) | |
1691 | continue; | |
1692 | ||
1693 | if (!hlist_unhashed(&p->mglist) && | |
1694 | (timer_pending(&p->timer) ? | |
1695 | time_after(p->timer.expires, time) : | |
1696 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1697 | mod_timer(&p->timer, time); | |
1698 | } | |
1699 | ||
1700 | break; | |
eb1d1641 | 1701 | } |
eb1d1641 HX |
1702 | out: |
1703 | spin_unlock(&br->multicast_lock); | |
1704 | } | |
1705 | ||
8ef2a9a5 YH |
1706 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
1707 | struct net_bridge_port *port, | |
b0e9a30d | 1708 | __be32 group, |
6db6f0ea FF |
1709 | __u16 vid, |
1710 | const unsigned char *src) | |
8ef2a9a5 YH |
1711 | { |
1712 | struct br_ip br_group; | |
90010b36 | 1713 | struct bridge_mcast_own_query *own_query; |
8ef2a9a5 YH |
1714 | |
1715 | if (ipv4_is_local_multicast(group)) | |
1716 | return; | |
1717 | ||
90010b36 LL |
1718 | own_query = port ? &port->ip4_own_query : &br->ip4_own_query; |
1719 | ||
8ef2a9a5 YH |
1720 | br_group.u.ip4 = group; |
1721 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 1722 | br_group.vid = vid; |
8ef2a9a5 | 1723 | |
90010b36 | 1724 | br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query, |
6db6f0ea | 1725 | own_query, src); |
8ef2a9a5 YH |
1726 | } |
1727 | ||
dfd56b8b | 1728 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1729 | static void br_ip6_multicast_leave_group(struct net_bridge *br, |
1730 | struct net_bridge_port *port, | |
b0e9a30d | 1731 | const struct in6_addr *group, |
6db6f0ea FF |
1732 | __u16 vid, |
1733 | const unsigned char *src) | |
08b202b6 YH |
1734 | { |
1735 | struct br_ip br_group; | |
90010b36 | 1736 | struct bridge_mcast_own_query *own_query; |
08b202b6 | 1737 | |
3c3769e6 | 1738 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
1739 | return; |
1740 | ||
90010b36 LL |
1741 | own_query = port ? &port->ip6_own_query : &br->ip6_own_query; |
1742 | ||
4e3fd7a0 | 1743 | br_group.u.ip6 = *group; |
08b202b6 | 1744 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 1745 | br_group.vid = vid; |
08b202b6 | 1746 | |
90010b36 | 1747 | br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query, |
6db6f0ea | 1748 | own_query, src); |
08b202b6 YH |
1749 | } |
1750 | #endif | |
8ef2a9a5 | 1751 | |
1080ab95 NA |
1752 | static void br_multicast_err_count(const struct net_bridge *br, |
1753 | const struct net_bridge_port *p, | |
1754 | __be16 proto) | |
1755 | { | |
1756 | struct bridge_mcast_stats __percpu *stats; | |
1757 | struct bridge_mcast_stats *pstats; | |
1758 | ||
675779ad | 1759 | if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) |
1080ab95 NA |
1760 | return; |
1761 | ||
1762 | if (p) | |
1763 | stats = p->mcast_stats; | |
1764 | else | |
1765 | stats = br->mcast_stats; | |
1766 | if (WARN_ON(!stats)) | |
1767 | return; | |
1768 | ||
1769 | pstats = this_cpu_ptr(stats); | |
1770 | ||
1771 | u64_stats_update_begin(&pstats->syncp); | |
1772 | switch (proto) { | |
1773 | case htons(ETH_P_IP): | |
1774 | pstats->mstats.igmp_parse_errors++; | |
1775 | break; | |
1776 | #if IS_ENABLED(CONFIG_IPV6) | |
1777 | case htons(ETH_P_IPV6): | |
1778 | pstats->mstats.mld_parse_errors++; | |
1779 | break; | |
1780 | #endif | |
1781 | } | |
1782 | u64_stats_update_end(&pstats->syncp); | |
1783 | } | |
1784 | ||
91b02d3d NA |
1785 | static void br_multicast_pim(struct net_bridge *br, |
1786 | struct net_bridge_port *port, | |
1787 | const struct sk_buff *skb) | |
1788 | { | |
1789 | unsigned int offset = skb_transport_offset(skb); | |
1790 | struct pimhdr *pimhdr, _pimhdr; | |
1791 | ||
1792 | pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr); | |
1793 | if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION || | |
1794 | pim_hdr_type(pimhdr) != PIM_TYPE_HELLO) | |
1795 | return; | |
1796 | ||
1797 | br_multicast_mark_router(br, port); | |
1798 | } | |
1799 | ||
eb1d1641 HX |
1800 | static int br_multicast_ipv4_rcv(struct net_bridge *br, |
1801 | struct net_bridge_port *port, | |
06499098 VY |
1802 | struct sk_buff *skb, |
1803 | u16 vid) | |
eb1d1641 | 1804 | { |
9afd85c9 | 1805 | struct sk_buff *skb_trimmed = NULL; |
6db6f0ea | 1806 | const unsigned char *src; |
eb1d1641 | 1807 | struct igmphdr *ih; |
eb1d1641 HX |
1808 | int err; |
1809 | ||
9afd85c9 | 1810 | err = ip_mc_check_igmp(skb, &skb_trimmed); |
eb1d1641 | 1811 | |
9afd85c9 | 1812 | if (err == -ENOMSG) { |
91b02d3d | 1813 | if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) { |
bd4265fe | 1814 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
91b02d3d NA |
1815 | } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) { |
1816 | if (ip_hdr(skb)->protocol == IPPROTO_PIM) | |
1817 | br_multicast_pim(br, port, skb); | |
1818 | } | |
eb1d1641 | 1819 | return 0; |
9afd85c9 | 1820 | } else if (err < 0) { |
1080ab95 | 1821 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1822 | return err; |
bd4265fe | 1823 | } |
eb1d1641 | 1824 | |
9afd85c9 | 1825 | ih = igmp_hdr(skb); |
6db6f0ea | 1826 | src = eth_hdr(skb)->h_source; |
1080ab95 | 1827 | BR_INPUT_SKB_CB(skb)->igmp = ih->type; |
eb1d1641 HX |
1828 | |
1829 | switch (ih->type) { | |
1830 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
1831 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
62b2bcb4 | 1832 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
6db6f0ea | 1833 | err = br_ip4_multicast_add_group(br, port, ih->group, vid, src); |
eb1d1641 HX |
1834 | break; |
1835 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
9afd85c9 | 1836 | err = br_ip4_multicast_igmp3_report(br, port, skb_trimmed, vid); |
eb1d1641 HX |
1837 | break; |
1838 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
9c2e955c | 1839 | br_ip4_multicast_query(br, port, skb_trimmed, vid); |
eb1d1641 HX |
1840 | break; |
1841 | case IGMP_HOST_LEAVE_MESSAGE: | |
6db6f0ea | 1842 | br_ip4_multicast_leave_group(br, port, ih->group, vid, src); |
eb1d1641 HX |
1843 | break; |
1844 | } | |
1845 | ||
a516993f | 1846 | if (skb_trimmed && skb_trimmed != skb) |
9afd85c9 LL |
1847 | kfree_skb(skb_trimmed); |
1848 | ||
a65056ec | 1849 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1850 | BR_MCAST_DIR_RX); |
1851 | ||
eb1d1641 HX |
1852 | return err; |
1853 | } | |
1854 | ||
dfd56b8b | 1855 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1856 | static int br_multicast_ipv6_rcv(struct net_bridge *br, |
1857 | struct net_bridge_port *port, | |
06499098 VY |
1858 | struct sk_buff *skb, |
1859 | u16 vid) | |
08b202b6 | 1860 | { |
9afd85c9 | 1861 | struct sk_buff *skb_trimmed = NULL; |
6db6f0ea | 1862 | const unsigned char *src; |
9afd85c9 | 1863 | struct mld_msg *mld; |
08b202b6 YH |
1864 | int err; |
1865 | ||
9afd85c9 | 1866 | err = ipv6_mc_check_mld(skb, &skb_trimmed); |
08b202b6 | 1867 | |
9afd85c9 LL |
1868 | if (err == -ENOMSG) { |
1869 | if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr)) | |
1870 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
08b202b6 | 1871 | return 0; |
9afd85c9 | 1872 | } else if (err < 0) { |
1080ab95 | 1873 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1874 | return err; |
08b202b6 YH |
1875 | } |
1876 | ||
9afd85c9 | 1877 | mld = (struct mld_msg *)skb_transport_header(skb); |
1080ab95 | 1878 | BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type; |
08b202b6 | 1879 | |
9afd85c9 | 1880 | switch (mld->mld_type) { |
08b202b6 | 1881 | case ICMPV6_MGM_REPORT: |
6db6f0ea | 1882 | src = eth_hdr(skb)->h_source; |
fc2af6c7 | 1883 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
6db6f0ea FF |
1884 | err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid, |
1885 | src); | |
08b202b6 | 1886 | break; |
08b202b6 | 1887 | case ICMPV6_MLD2_REPORT: |
9afd85c9 | 1888 | err = br_ip6_multicast_mld2_report(br, port, skb_trimmed, vid); |
08b202b6 YH |
1889 | break; |
1890 | case ICMPV6_MGM_QUERY: | |
9afd85c9 | 1891 | err = br_ip6_multicast_query(br, port, skb_trimmed, vid); |
08b202b6 YH |
1892 | break; |
1893 | case ICMPV6_MGM_REDUCTION: | |
6db6f0ea FF |
1894 | src = eth_hdr(skb)->h_source; |
1895 | br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src); | |
9afd85c9 | 1896 | break; |
08b202b6 YH |
1897 | } |
1898 | ||
a516993f | 1899 | if (skb_trimmed && skb_trimmed != skb) |
9afd85c9 LL |
1900 | kfree_skb(skb_trimmed); |
1901 | ||
a65056ec | 1902 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1903 | BR_MCAST_DIR_RX); |
1904 | ||
08b202b6 YH |
1905 | return err; |
1906 | } | |
1907 | #endif | |
1908 | ||
eb1d1641 | 1909 | int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, |
06499098 | 1910 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 1911 | { |
1080ab95 NA |
1912 | int ret = 0; |
1913 | ||
1fafc7a9 YH |
1914 | BR_INPUT_SKB_CB(skb)->igmp = 0; |
1915 | BR_INPUT_SKB_CB(skb)->mrouters_only = 0; | |
1916 | ||
13cefad2 | 1917 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
1918 | return 0; |
1919 | ||
1920 | switch (skb->protocol) { | |
1921 | case htons(ETH_P_IP): | |
1080ab95 NA |
1922 | ret = br_multicast_ipv4_rcv(br, port, skb, vid); |
1923 | break; | |
dfd56b8b | 1924 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 1925 | case htons(ETH_P_IPV6): |
1080ab95 NA |
1926 | ret = br_multicast_ipv6_rcv(br, port, skb, vid); |
1927 | break; | |
08b202b6 | 1928 | #endif |
eb1d1641 HX |
1929 | } |
1930 | ||
1080ab95 | 1931 | return ret; |
eb1d1641 HX |
1932 | } |
1933 | ||
cc0fdd80 | 1934 | static void br_multicast_query_expired(struct net_bridge *br, |
2cd41431 LL |
1935 | struct bridge_mcast_own_query *query, |
1936 | struct bridge_mcast_querier *querier) | |
cc0fdd80 LL |
1937 | { |
1938 | spin_lock(&br->multicast_lock); | |
1939 | if (query->startup_sent < br->multicast_startup_query_count) | |
1940 | query->startup_sent++; | |
1941 | ||
71d9f614 | 1942 | RCU_INIT_POINTER(querier->port, NULL); |
cc0fdd80 LL |
1943 | br_multicast_send_query(br, NULL, query); |
1944 | spin_unlock(&br->multicast_lock); | |
1945 | } | |
1946 | ||
88c1f37f | 1947 | static void br_ip4_multicast_query_expired(struct timer_list *t) |
eb1d1641 | 1948 | { |
88c1f37f | 1949 | struct net_bridge *br = from_timer(br, t, ip4_own_query.timer); |
eb1d1641 | 1950 | |
2cd41431 | 1951 | br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier); |
cc0fdd80 | 1952 | } |
eb1d1641 | 1953 | |
cc0fdd80 | 1954 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f | 1955 | static void br_ip6_multicast_query_expired(struct timer_list *t) |
cc0fdd80 | 1956 | { |
88c1f37f | 1957 | struct net_bridge *br = from_timer(br, t, ip6_own_query.timer); |
eb1d1641 | 1958 | |
2cd41431 | 1959 | br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier); |
eb1d1641 | 1960 | } |
cc0fdd80 | 1961 | #endif |
eb1d1641 HX |
1962 | |
1963 | void br_multicast_init(struct net_bridge *br) | |
1964 | { | |
1965 | br->hash_elasticity = 4; | |
1966 | br->hash_max = 512; | |
1967 | ||
7f0aec7a | 1968 | br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
eb1d1641 HX |
1969 | br->multicast_last_member_count = 2; |
1970 | br->multicast_startup_query_count = 2; | |
1971 | ||
1972 | br->multicast_last_member_interval = HZ; | |
1973 | br->multicast_query_response_interval = 10 * HZ; | |
1974 | br->multicast_startup_query_interval = 125 * HZ / 4; | |
1975 | br->multicast_query_interval = 125 * HZ; | |
1976 | br->multicast_querier_interval = 255 * HZ; | |
1977 | br->multicast_membership_interval = 260 * HZ; | |
1978 | ||
90010b36 | 1979 | br->ip4_other_query.delay_time = 0; |
2cd41431 | 1980 | br->ip4_querier.port = NULL; |
aa2ae3e7 | 1981 | br->multicast_igmp_version = 2; |
cc0fdd80 | 1982 | #if IS_ENABLED(CONFIG_IPV6) |
aa2ae3e7 | 1983 | br->multicast_mld_version = 1; |
90010b36 | 1984 | br->ip6_other_query.delay_time = 0; |
2cd41431 | 1985 | br->ip6_querier.port = NULL; |
cc0fdd80 | 1986 | #endif |
6919622a | 1987 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true); |
675779ad | 1988 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); |
b00589af | 1989 | |
eb1d1641 | 1990 | spin_lock_init(&br->multicast_lock); |
88c1f37f AP |
1991 | timer_setup(&br->multicast_router_timer, |
1992 | br_multicast_local_router_expired, 0); | |
1993 | timer_setup(&br->ip4_other_query.timer, | |
1994 | br_ip4_multicast_querier_expired, 0); | |
1995 | timer_setup(&br->ip4_own_query.timer, | |
1996 | br_ip4_multicast_query_expired, 0); | |
cc0fdd80 | 1997 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f AP |
1998 | timer_setup(&br->ip6_other_query.timer, |
1999 | br_ip6_multicast_querier_expired, 0); | |
2000 | timer_setup(&br->ip6_own_query.timer, | |
2001 | br_ip6_multicast_query_expired, 0); | |
cc0fdd80 | 2002 | #endif |
eb1d1641 HX |
2003 | } |
2004 | ||
cc0fdd80 | 2005 | static void __br_multicast_open(struct net_bridge *br, |
90010b36 | 2006 | struct bridge_mcast_own_query *query) |
eb1d1641 | 2007 | { |
cc0fdd80 | 2008 | query->startup_sent = 0; |
eb1d1641 | 2009 | |
13cefad2 | 2010 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
2011 | return; |
2012 | ||
cc0fdd80 LL |
2013 | mod_timer(&query->timer, jiffies); |
2014 | } | |
2015 | ||
2016 | void br_multicast_open(struct net_bridge *br) | |
2017 | { | |
90010b36 | 2018 | __br_multicast_open(br, &br->ip4_own_query); |
cc0fdd80 | 2019 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 2020 | __br_multicast_open(br, &br->ip6_own_query); |
cc0fdd80 | 2021 | #endif |
eb1d1641 HX |
2022 | } |
2023 | ||
2024 | void br_multicast_stop(struct net_bridge *br) | |
2025 | { | |
eb1d1641 | 2026 | del_timer_sync(&br->multicast_router_timer); |
90010b36 LL |
2027 | del_timer_sync(&br->ip4_other_query.timer); |
2028 | del_timer_sync(&br->ip4_own_query.timer); | |
cc0fdd80 | 2029 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 LL |
2030 | del_timer_sync(&br->ip6_other_query.timer); |
2031 | del_timer_sync(&br->ip6_own_query.timer); | |
cc0fdd80 | 2032 | #endif |
e10177ab SA |
2033 | } |
2034 | ||
2035 | void br_multicast_dev_del(struct net_bridge *br) | |
2036 | { | |
2037 | struct net_bridge_mdb_htable *mdb; | |
2038 | struct net_bridge_mdb_entry *mp; | |
2039 | struct hlist_node *n; | |
2040 | u32 ver; | |
2041 | int i; | |
eb1d1641 HX |
2042 | |
2043 | spin_lock_bh(&br->multicast_lock); | |
e8051688 | 2044 | mdb = mlock_dereference(br->mdb, br); |
eb1d1641 HX |
2045 | if (!mdb) |
2046 | goto out; | |
2047 | ||
2048 | br->mdb = NULL; | |
2049 | ||
2050 | ver = mdb->ver; | |
2051 | for (i = 0; i < mdb->max; i++) { | |
b67bfe0d | 2052 | hlist_for_each_entry_safe(mp, n, &mdb->mhash[i], |
eb1d1641 HX |
2053 | hlist[ver]) { |
2054 | del_timer(&mp->timer); | |
eb1d1641 HX |
2055 | call_rcu_bh(&mp->rcu, br_multicast_free_group); |
2056 | } | |
2057 | } | |
2058 | ||
2059 | if (mdb->old) { | |
2060 | spin_unlock_bh(&br->multicast_lock); | |
10cc2b50 | 2061 | rcu_barrier_bh(); |
eb1d1641 HX |
2062 | spin_lock_bh(&br->multicast_lock); |
2063 | WARN_ON(mdb->old); | |
2064 | } | |
2065 | ||
2066 | mdb->old = mdb; | |
2067 | call_rcu_bh(&mdb->rcu, br_mdb_free); | |
2068 | ||
2069 | out: | |
2070 | spin_unlock_bh(&br->multicast_lock); | |
2071 | } | |
0909e117 HX |
2072 | |
2073 | int br_multicast_set_router(struct net_bridge *br, unsigned long val) | |
2074 | { | |
6ae4ae8e | 2075 | int err = -EINVAL; |
0909e117 HX |
2076 | |
2077 | spin_lock_bh(&br->multicast_lock); | |
0909e117 HX |
2078 | |
2079 | switch (val) { | |
7f0aec7a NA |
2080 | case MDB_RTR_TYPE_DISABLED: |
2081 | case MDB_RTR_TYPE_PERM: | |
77041420 | 2082 | br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM); |
0909e117 | 2083 | del_timer(&br->multicast_router_timer); |
77041420 YG |
2084 | br->multicast_router = val; |
2085 | err = 0; | |
2086 | break; | |
7f0aec7a | 2087 | case MDB_RTR_TYPE_TEMP_QUERY: |
77041420 YG |
2088 | if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY) |
2089 | br_mc_router_state_change(br, false); | |
0909e117 HX |
2090 | br->multicast_router = val; |
2091 | err = 0; | |
2092 | break; | |
0909e117 HX |
2093 | } |
2094 | ||
0909e117 HX |
2095 | spin_unlock_bh(&br->multicast_lock); |
2096 | ||
2097 | return err; | |
2098 | } | |
2099 | ||
7f0aec7a NA |
2100 | static void __del_port_router(struct net_bridge_port *p) |
2101 | { | |
2102 | if (hlist_unhashed(&p->rlist)) | |
2103 | return; | |
2104 | hlist_del_init_rcu(&p->rlist); | |
2105 | br_rtr_notify(p->br->dev, p, RTM_DELMDB); | |
6d549648 | 2106 | br_port_mc_router_state_change(p, false); |
f12e7d95 NF |
2107 | |
2108 | /* don't allow timer refresh */ | |
2109 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
2110 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
7f0aec7a NA |
2111 | } |
2112 | ||
0909e117 HX |
2113 | int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val) |
2114 | { | |
2115 | struct net_bridge *br = p->br; | |
a55d8246 | 2116 | unsigned long now = jiffies; |
6ae4ae8e | 2117 | int err = -EINVAL; |
0909e117 HX |
2118 | |
2119 | spin_lock(&br->multicast_lock); | |
4950cfd1 | 2120 | if (p->multicast_router == val) { |
a55d8246 NA |
2121 | /* Refresh the temp router port timer */ |
2122 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
2123 | mod_timer(&p->multicast_router_timer, | |
2124 | now + br->multicast_querier_interval); | |
4950cfd1 NA |
2125 | err = 0; |
2126 | goto unlock; | |
2127 | } | |
0909e117 | 2128 | switch (val) { |
7f0aec7a NA |
2129 | case MDB_RTR_TYPE_DISABLED: |
2130 | p->multicast_router = MDB_RTR_TYPE_DISABLED; | |
2131 | __del_port_router(p); | |
2132 | del_timer(&p->multicast_router_timer); | |
2133 | break; | |
2134 | case MDB_RTR_TYPE_TEMP_QUERY: | |
2135 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
2136 | __del_port_router(p); | |
2137 | break; | |
2138 | case MDB_RTR_TYPE_PERM: | |
2139 | p->multicast_router = MDB_RTR_TYPE_PERM; | |
0909e117 | 2140 | del_timer(&p->multicast_router_timer); |
0909e117 HX |
2141 | br_multicast_add_router(br, p); |
2142 | break; | |
a55d8246 NA |
2143 | case MDB_RTR_TYPE_TEMP: |
2144 | p->multicast_router = MDB_RTR_TYPE_TEMP; | |
2145 | br_multicast_mark_router(br, p); | |
2146 | break; | |
7f0aec7a NA |
2147 | default: |
2148 | goto unlock; | |
0909e117 | 2149 | } |
7f0aec7a NA |
2150 | err = 0; |
2151 | unlock: | |
0909e117 HX |
2152 | spin_unlock(&br->multicast_lock); |
2153 | ||
2154 | return err; | |
2155 | } | |
561f1103 | 2156 | |
cc0fdd80 | 2157 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 2158 | struct bridge_mcast_own_query *query) |
561f1103 HX |
2159 | { |
2160 | struct net_bridge_port *port; | |
74857216 | 2161 | |
cc0fdd80 | 2162 | __br_multicast_open(br, query); |
74857216 HX |
2163 | |
2164 | list_for_each_entry(port, &br->port_list, list) { | |
2165 | if (port->state == BR_STATE_DISABLED || | |
2166 | port->state == BR_STATE_BLOCKING) | |
2167 | continue; | |
2168 | ||
90010b36 LL |
2169 | if (query == &br->ip4_own_query) |
2170 | br_multicast_enable(&port->ip4_own_query); | |
cc0fdd80 LL |
2171 | #if IS_ENABLED(CONFIG_IPV6) |
2172 | else | |
90010b36 | 2173 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 2174 | #endif |
74857216 HX |
2175 | } |
2176 | } | |
2177 | ||
2178 | int br_multicast_toggle(struct net_bridge *br, unsigned long val) | |
2179 | { | |
e8051688 | 2180 | struct net_bridge_mdb_htable *mdb; |
7cb3f921 NA |
2181 | struct net_bridge_port *port; |
2182 | int err = 0; | |
561f1103 | 2183 | |
ef5e0d82 | 2184 | spin_lock_bh(&br->multicast_lock); |
13cefad2 | 2185 | if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val) |
561f1103 HX |
2186 | goto unlock; |
2187 | ||
13cefad2 NA |
2188 | br_mc_disabled_update(br->dev, val); |
2189 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val); | |
2190 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
561f1103 HX |
2191 | goto unlock; |
2192 | ||
3a7fda06 HX |
2193 | if (!netif_running(br->dev)) |
2194 | goto unlock; | |
2195 | ||
e8051688 ED |
2196 | mdb = mlock_dereference(br->mdb, br); |
2197 | if (mdb) { | |
2198 | if (mdb->old) { | |
561f1103 HX |
2199 | err = -EEXIST; |
2200 | rollback: | |
13cefad2 | 2201 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false); |
561f1103 HX |
2202 | goto unlock; |
2203 | } | |
2204 | ||
e8051688 | 2205 | err = br_mdb_rehash(&br->mdb, mdb->max, |
561f1103 HX |
2206 | br->hash_elasticity); |
2207 | if (err) | |
2208 | goto rollback; | |
2209 | } | |
2210 | ||
7cb3f921 NA |
2211 | br_multicast_open(br); |
2212 | list_for_each_entry(port, &br->port_list, list) | |
2213 | __br_multicast_enable_port(port); | |
561f1103 HX |
2214 | |
2215 | unlock: | |
ef5e0d82 | 2216 | spin_unlock_bh(&br->multicast_lock); |
561f1103 HX |
2217 | |
2218 | return err; | |
2219 | } | |
b195167f | 2220 | |
9341b988 IS |
2221 | bool br_multicast_enabled(const struct net_device *dev) |
2222 | { | |
2223 | struct net_bridge *br = netdev_priv(dev); | |
2224 | ||
13cefad2 | 2225 | return !!br_opt_get(br, BROPT_MULTICAST_ENABLED); |
9341b988 IS |
2226 | } |
2227 | EXPORT_SYMBOL_GPL(br_multicast_enabled); | |
2228 | ||
0912bda4 YG |
2229 | bool br_multicast_router(const struct net_device *dev) |
2230 | { | |
2231 | struct net_bridge *br = netdev_priv(dev); | |
2232 | bool is_router; | |
2233 | ||
2234 | spin_lock_bh(&br->multicast_lock); | |
2235 | is_router = br_multicast_is_router(br); | |
2236 | spin_unlock_bh(&br->multicast_lock); | |
2237 | return is_router; | |
2238 | } | |
2239 | EXPORT_SYMBOL_GPL(br_multicast_router); | |
2240 | ||
c5c23260 HX |
2241 | int br_multicast_set_querier(struct net_bridge *br, unsigned long val) |
2242 | { | |
b00589af LL |
2243 | unsigned long max_delay; |
2244 | ||
c5c23260 HX |
2245 | val = !!val; |
2246 | ||
2247 | spin_lock_bh(&br->multicast_lock); | |
675779ad | 2248 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val) |
c5c23260 HX |
2249 | goto unlock; |
2250 | ||
675779ad | 2251 | br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val); |
b00589af LL |
2252 | if (!val) |
2253 | goto unlock; | |
2254 | ||
2255 | max_delay = br->multicast_query_response_interval; | |
b00589af | 2256 | |
90010b36 LL |
2257 | if (!timer_pending(&br->ip4_other_query.timer)) |
2258 | br->ip4_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2259 | |
90010b36 | 2260 | br_multicast_start_querier(br, &br->ip4_own_query); |
cc0fdd80 LL |
2261 | |
2262 | #if IS_ENABLED(CONFIG_IPV6) | |
90010b36 LL |
2263 | if (!timer_pending(&br->ip6_other_query.timer)) |
2264 | br->ip6_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2265 | |
90010b36 | 2266 | br_multicast_start_querier(br, &br->ip6_own_query); |
cc0fdd80 | 2267 | #endif |
c5c23260 HX |
2268 | |
2269 | unlock: | |
2270 | spin_unlock_bh(&br->multicast_lock); | |
2271 | ||
2272 | return 0; | |
2273 | } | |
2274 | ||
b195167f HX |
2275 | int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val) |
2276 | { | |
6ae4ae8e | 2277 | int err = -EINVAL; |
b195167f | 2278 | u32 old; |
e8051688 | 2279 | struct net_bridge_mdb_htable *mdb; |
b195167f | 2280 | |
fe0d692b | 2281 | spin_lock_bh(&br->multicast_lock); |
b195167f HX |
2282 | if (!is_power_of_2(val)) |
2283 | goto unlock; | |
e8051688 ED |
2284 | |
2285 | mdb = mlock_dereference(br->mdb, br); | |
2286 | if (mdb && val < mdb->size) | |
b195167f HX |
2287 | goto unlock; |
2288 | ||
2289 | err = 0; | |
2290 | ||
2291 | old = br->hash_max; | |
2292 | br->hash_max = val; | |
2293 | ||
e8051688 ED |
2294 | if (mdb) { |
2295 | if (mdb->old) { | |
b195167f HX |
2296 | err = -EEXIST; |
2297 | rollback: | |
2298 | br->hash_max = old; | |
2299 | goto unlock; | |
2300 | } | |
2301 | ||
2302 | err = br_mdb_rehash(&br->mdb, br->hash_max, | |
2303 | br->hash_elasticity); | |
2304 | if (err) | |
2305 | goto rollback; | |
2306 | } | |
2307 | ||
2308 | unlock: | |
fe0d692b | 2309 | spin_unlock_bh(&br->multicast_lock); |
b195167f HX |
2310 | |
2311 | return err; | |
2312 | } | |
07f8ac4a | 2313 | |
5e923585 NA |
2314 | int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val) |
2315 | { | |
2316 | /* Currently we support only version 2 and 3 */ | |
2317 | switch (val) { | |
2318 | case 2: | |
2319 | case 3: | |
2320 | break; | |
2321 | default: | |
2322 | return -EINVAL; | |
2323 | } | |
2324 | ||
2325 | spin_lock_bh(&br->multicast_lock); | |
2326 | br->multicast_igmp_version = val; | |
2327 | spin_unlock_bh(&br->multicast_lock); | |
2328 | ||
2329 | return 0; | |
2330 | } | |
2331 | ||
aa2ae3e7 NA |
2332 | #if IS_ENABLED(CONFIG_IPV6) |
2333 | int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val) | |
2334 | { | |
2335 | /* Currently we support version 1 and 2 */ | |
2336 | switch (val) { | |
2337 | case 1: | |
2338 | case 2: | |
2339 | break; | |
2340 | default: | |
2341 | return -EINVAL; | |
2342 | } | |
2343 | ||
2344 | spin_lock_bh(&br->multicast_lock); | |
2345 | br->multicast_mld_version = val; | |
2346 | spin_unlock_bh(&br->multicast_lock); | |
2347 | ||
2348 | return 0; | |
2349 | } | |
2350 | #endif | |
2351 | ||
07f8ac4a LL |
2352 | /** |
2353 | * br_multicast_list_adjacent - Returns snooped multicast addresses | |
2354 | * @dev: The bridge port adjacent to which to retrieve addresses | |
2355 | * @br_ip_list: The list to store found, snooped multicast IP addresses in | |
2356 | * | |
2357 | * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast | |
2358 | * snooping feature on all bridge ports of dev's bridge device, excluding | |
2359 | * the addresses from dev itself. | |
2360 | * | |
2361 | * Returns the number of items added to br_ip_list. | |
2362 | * | |
2363 | * Notes: | |
2364 | * - br_ip_list needs to be initialized by caller | |
2365 | * - br_ip_list might contain duplicates in the end | |
2366 | * (needs to be taken care of by caller) | |
2367 | * - br_ip_list needs to be freed by caller | |
2368 | */ | |
2369 | int br_multicast_list_adjacent(struct net_device *dev, | |
2370 | struct list_head *br_ip_list) | |
2371 | { | |
2372 | struct net_bridge *br; | |
2373 | struct net_bridge_port *port; | |
2374 | struct net_bridge_port_group *group; | |
2375 | struct br_ip_list *entry; | |
2376 | int count = 0; | |
2377 | ||
2378 | rcu_read_lock(); | |
2379 | if (!br_ip_list || !br_port_exists(dev)) | |
2380 | goto unlock; | |
2381 | ||
2382 | port = br_port_get_rcu(dev); | |
2383 | if (!port || !port->br) | |
2384 | goto unlock; | |
2385 | ||
2386 | br = port->br; | |
2387 | ||
2388 | list_for_each_entry_rcu(port, &br->port_list, list) { | |
2389 | if (!port->dev || port->dev == dev) | |
2390 | continue; | |
2391 | ||
2392 | hlist_for_each_entry_rcu(group, &port->mglist, mglist) { | |
2393 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); | |
2394 | if (!entry) | |
2395 | goto unlock; | |
2396 | ||
2397 | entry->addr = group->addr; | |
2398 | list_add(&entry->list, br_ip_list); | |
2399 | count++; | |
2400 | } | |
2401 | } | |
2402 | ||
2403 | unlock: | |
2404 | rcu_read_unlock(); | |
2405 | return count; | |
2406 | } | |
2407 | EXPORT_SYMBOL_GPL(br_multicast_list_adjacent); | |
2cd41431 | 2408 | |
c34963e2 LL |
2409 | /** |
2410 | * br_multicast_has_querier_anywhere - Checks for a querier on a bridge | |
2411 | * @dev: The bridge port providing the bridge on which to check for a querier | |
2412 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2413 | * | |
2414 | * Checks whether the given interface has a bridge on top and if so returns | |
2415 | * true if a valid querier exists anywhere on the bridged link layer. | |
2416 | * Otherwise returns false. | |
2417 | */ | |
2418 | bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto) | |
2419 | { | |
2420 | struct net_bridge *br; | |
2421 | struct net_bridge_port *port; | |
2422 | struct ethhdr eth; | |
2423 | bool ret = false; | |
2424 | ||
2425 | rcu_read_lock(); | |
2426 | if (!br_port_exists(dev)) | |
2427 | goto unlock; | |
2428 | ||
2429 | port = br_port_get_rcu(dev); | |
2430 | if (!port || !port->br) | |
2431 | goto unlock; | |
2432 | ||
2433 | br = port->br; | |
2434 | ||
2435 | memset(ð, 0, sizeof(eth)); | |
2436 | eth.h_proto = htons(proto); | |
2437 | ||
2438 | ret = br_multicast_querier_exists(br, ð); | |
2439 | ||
2440 | unlock: | |
2441 | rcu_read_unlock(); | |
2442 | return ret; | |
2443 | } | |
2444 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere); | |
2445 | ||
2cd41431 LL |
2446 | /** |
2447 | * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port | |
2448 | * @dev: The bridge port adjacent to which to check for a querier | |
2449 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2450 | * | |
2451 | * Checks whether the given interface has a bridge on top and if so returns | |
2452 | * true if a selected querier is behind one of the other ports of this | |
2453 | * bridge. Otherwise returns false. | |
2454 | */ | |
2455 | bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto) | |
2456 | { | |
2457 | struct net_bridge *br; | |
2458 | struct net_bridge_port *port; | |
2459 | bool ret = false; | |
2460 | ||
2461 | rcu_read_lock(); | |
2462 | if (!br_port_exists(dev)) | |
2463 | goto unlock; | |
2464 | ||
2465 | port = br_port_get_rcu(dev); | |
2466 | if (!port || !port->br) | |
2467 | goto unlock; | |
2468 | ||
2469 | br = port->br; | |
2470 | ||
2471 | switch (proto) { | |
2472 | case ETH_P_IP: | |
2473 | if (!timer_pending(&br->ip4_other_query.timer) || | |
2474 | rcu_dereference(br->ip4_querier.port) == port) | |
2475 | goto unlock; | |
2476 | break; | |
3993c4e1 | 2477 | #if IS_ENABLED(CONFIG_IPV6) |
2cd41431 LL |
2478 | case ETH_P_IPV6: |
2479 | if (!timer_pending(&br->ip6_other_query.timer) || | |
2480 | rcu_dereference(br->ip6_querier.port) == port) | |
2481 | goto unlock; | |
2482 | break; | |
3993c4e1 | 2483 | #endif |
2cd41431 LL |
2484 | default: |
2485 | goto unlock; | |
2486 | } | |
2487 | ||
2488 | ret = true; | |
2489 | unlock: | |
2490 | rcu_read_unlock(); | |
2491 | return ret; | |
2492 | } | |
2493 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent); | |
1080ab95 NA |
2494 | |
2495 | static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, | |
a65056ec | 2496 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2497 | { |
2498 | struct bridge_mcast_stats *pstats = this_cpu_ptr(stats); | |
a65056ec NA |
2499 | __be16 proto = skb->protocol; |
2500 | unsigned int t_len; | |
1080ab95 NA |
2501 | |
2502 | u64_stats_update_begin(&pstats->syncp); | |
2503 | switch (proto) { | |
2504 | case htons(ETH_P_IP): | |
a65056ec | 2505 | t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb); |
1080ab95 NA |
2506 | switch (type) { |
2507 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
2508 | pstats->mstats.igmp_v1reports[dir]++; | |
2509 | break; | |
2510 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
2511 | pstats->mstats.igmp_v2reports[dir]++; | |
2512 | break; | |
2513 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
2514 | pstats->mstats.igmp_v3reports[dir]++; | |
2515 | break; | |
2516 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
a65056ec NA |
2517 | if (t_len != sizeof(struct igmphdr)) { |
2518 | pstats->mstats.igmp_v3queries[dir]++; | |
2519 | } else { | |
2520 | unsigned int offset = skb_transport_offset(skb); | |
2521 | struct igmphdr *ih, _ihdr; | |
2522 | ||
2523 | ih = skb_header_pointer(skb, offset, | |
2524 | sizeof(_ihdr), &_ihdr); | |
2525 | if (!ih) | |
2526 | break; | |
2527 | if (!ih->code) | |
2528 | pstats->mstats.igmp_v1queries[dir]++; | |
2529 | else | |
2530 | pstats->mstats.igmp_v2queries[dir]++; | |
2531 | } | |
1080ab95 NA |
2532 | break; |
2533 | case IGMP_HOST_LEAVE_MESSAGE: | |
2534 | pstats->mstats.igmp_leaves[dir]++; | |
2535 | break; | |
2536 | } | |
2537 | break; | |
2538 | #if IS_ENABLED(CONFIG_IPV6) | |
2539 | case htons(ETH_P_IPV6): | |
a65056ec NA |
2540 | t_len = ntohs(ipv6_hdr(skb)->payload_len) + |
2541 | sizeof(struct ipv6hdr); | |
2542 | t_len -= skb_network_header_len(skb); | |
1080ab95 NA |
2543 | switch (type) { |
2544 | case ICMPV6_MGM_REPORT: | |
2545 | pstats->mstats.mld_v1reports[dir]++; | |
2546 | break; | |
2547 | case ICMPV6_MLD2_REPORT: | |
2548 | pstats->mstats.mld_v2reports[dir]++; | |
2549 | break; | |
2550 | case ICMPV6_MGM_QUERY: | |
a65056ec NA |
2551 | if (t_len != sizeof(struct mld_msg)) |
2552 | pstats->mstats.mld_v2queries[dir]++; | |
2553 | else | |
2554 | pstats->mstats.mld_v1queries[dir]++; | |
1080ab95 NA |
2555 | break; |
2556 | case ICMPV6_MGM_REDUCTION: | |
2557 | pstats->mstats.mld_leaves[dir]++; | |
2558 | break; | |
2559 | } | |
2560 | break; | |
2561 | #endif /* CONFIG_IPV6 */ | |
2562 | } | |
2563 | u64_stats_update_end(&pstats->syncp); | |
2564 | } | |
2565 | ||
2566 | void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, | |
a65056ec | 2567 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2568 | { |
2569 | struct bridge_mcast_stats __percpu *stats; | |
2570 | ||
2571 | /* if multicast_disabled is true then igmp type can't be set */ | |
675779ad | 2572 | if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) |
1080ab95 NA |
2573 | return; |
2574 | ||
2575 | if (p) | |
2576 | stats = p->mcast_stats; | |
2577 | else | |
2578 | stats = br->mcast_stats; | |
2579 | if (WARN_ON(!stats)) | |
2580 | return; | |
2581 | ||
a65056ec | 2582 | br_mcast_stats_add(stats, skb, type, dir); |
1080ab95 NA |
2583 | } |
2584 | ||
2585 | int br_multicast_init_stats(struct net_bridge *br) | |
2586 | { | |
2587 | br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); | |
2588 | if (!br->mcast_stats) | |
2589 | return -ENOMEM; | |
2590 | ||
2591 | return 0; | |
2592 | } | |
2593 | ||
b6fe0440 IS |
2594 | void br_multicast_uninit_stats(struct net_bridge *br) |
2595 | { | |
2596 | free_percpu(br->mcast_stats); | |
2597 | } | |
2598 | ||
1080ab95 NA |
2599 | static void mcast_stats_add_dir(u64 *dst, u64 *src) |
2600 | { | |
2601 | dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX]; | |
2602 | dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX]; | |
2603 | } | |
2604 | ||
2605 | void br_multicast_get_stats(const struct net_bridge *br, | |
2606 | const struct net_bridge_port *p, | |
2607 | struct br_mcast_stats *dest) | |
2608 | { | |
2609 | struct bridge_mcast_stats __percpu *stats; | |
2610 | struct br_mcast_stats tdst; | |
2611 | int i; | |
2612 | ||
2613 | memset(dest, 0, sizeof(*dest)); | |
2614 | if (p) | |
2615 | stats = p->mcast_stats; | |
2616 | else | |
2617 | stats = br->mcast_stats; | |
2618 | if (WARN_ON(!stats)) | |
2619 | return; | |
2620 | ||
2621 | memset(&tdst, 0, sizeof(tdst)); | |
2622 | for_each_possible_cpu(i) { | |
2623 | struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i); | |
2624 | struct br_mcast_stats temp; | |
2625 | unsigned int start; | |
2626 | ||
2627 | do { | |
2628 | start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); | |
2629 | memcpy(&temp, &cpu_stats->mstats, sizeof(temp)); | |
2630 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); | |
2631 | ||
a65056ec NA |
2632 | mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries); |
2633 | mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries); | |
2634 | mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries); | |
1080ab95 NA |
2635 | mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves); |
2636 | mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports); | |
2637 | mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports); | |
2638 | mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports); | |
2639 | tdst.igmp_parse_errors += temp.igmp_parse_errors; | |
2640 | ||
a65056ec NA |
2641 | mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries); |
2642 | mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries); | |
1080ab95 NA |
2643 | mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves); |
2644 | mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports); | |
2645 | mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports); | |
2646 | tdst.mld_parse_errors += temp.mld_parse_errors; | |
2647 | } | |
2648 | memcpy(dest, &tdst, sizeof(*dest)); | |
2649 | } |