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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 | ||
7f285fa7 | 161 | if (br->multicast_disabled) |
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 | ||
242 | static void br_multicast_group_expired(unsigned long data) | |
243 | { | |
244 | struct net_bridge_mdb_entry *mp = (void *)data; | |
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 | ||
8a870178 | 252 | mp->mglist = false; |
eb1d1641 HX |
253 | |
254 | if (mp->ports) | |
255 | goto out; | |
256 | ||
e8051688 ED |
257 | mdb = mlock_dereference(br->mdb, br); |
258 | ||
eb1d1641 HX |
259 | hlist_del_rcu(&mp->hlist[mdb->ver]); |
260 | mdb->size--; | |
261 | ||
eb1d1641 HX |
262 | call_rcu_bh(&mp->rcu, br_multicast_free_group); |
263 | ||
264 | out: | |
265 | spin_unlock(&br->multicast_lock); | |
266 | } | |
267 | ||
268 | static void br_multicast_del_pg(struct net_bridge *br, | |
269 | struct net_bridge_port_group *pg) | |
270 | { | |
e8051688 | 271 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 HX |
272 | struct net_bridge_mdb_entry *mp; |
273 | struct net_bridge_port_group *p; | |
e8051688 ED |
274 | struct net_bridge_port_group __rcu **pp; |
275 | ||
276 | mdb = mlock_dereference(br->mdb, br); | |
eb1d1641 | 277 | |
8ef2a9a5 | 278 | mp = br_mdb_ip_get(mdb, &pg->addr); |
eb1d1641 HX |
279 | if (WARN_ON(!mp)) |
280 | return; | |
281 | ||
e8051688 ED |
282 | for (pp = &mp->ports; |
283 | (p = mlock_dereference(*pp, br)) != NULL; | |
284 | pp = &p->next) { | |
eb1d1641 HX |
285 | if (p != pg) |
286 | continue; | |
287 | ||
83f6a740 | 288 | rcu_assign_pointer(*pp, p->next); |
eb1d1641 HX |
289 | hlist_del_init(&p->mglist); |
290 | del_timer(&p->timer); | |
45ebcce5 ER |
291 | br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB, |
292 | p->flags); | |
eb1d1641 HX |
293 | call_rcu_bh(&p->rcu, br_multicast_free_pg); |
294 | ||
454594f3 | 295 | if (!mp->ports && !mp->mglist && |
eb1d1641 HX |
296 | netif_running(br->dev)) |
297 | mod_timer(&mp->timer, jiffies); | |
298 | ||
299 | return; | |
300 | } | |
301 | ||
302 | WARN_ON(1); | |
303 | } | |
304 | ||
305 | static void br_multicast_port_group_expired(unsigned long data) | |
306 | { | |
307 | struct net_bridge_port_group *pg = (void *)data; | |
308 | struct net_bridge *br = pg->port->br; | |
309 | ||
310 | spin_lock(&br->multicast_lock); | |
311 | if (!netif_running(br->dev) || timer_pending(&pg->timer) || | |
9d06b6d8 | 312 | hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT) |
eb1d1641 HX |
313 | goto out; |
314 | ||
315 | br_multicast_del_pg(br, pg); | |
316 | ||
317 | out: | |
318 | spin_unlock(&br->multicast_lock); | |
319 | } | |
320 | ||
e8051688 | 321 | static int br_mdb_rehash(struct net_bridge_mdb_htable __rcu **mdbp, int max, |
eb1d1641 HX |
322 | int elasticity) |
323 | { | |
e8051688 | 324 | struct net_bridge_mdb_htable *old = rcu_dereference_protected(*mdbp, 1); |
eb1d1641 HX |
325 | struct net_bridge_mdb_htable *mdb; |
326 | int err; | |
327 | ||
328 | mdb = kmalloc(sizeof(*mdb), GFP_ATOMIC); | |
329 | if (!mdb) | |
330 | return -ENOMEM; | |
331 | ||
332 | mdb->max = max; | |
333 | mdb->old = old; | |
334 | ||
335 | mdb->mhash = kzalloc(max * sizeof(*mdb->mhash), GFP_ATOMIC); | |
336 | if (!mdb->mhash) { | |
337 | kfree(mdb); | |
338 | return -ENOMEM; | |
339 | } | |
340 | ||
341 | mdb->size = old ? old->size : 0; | |
342 | mdb->ver = old ? old->ver ^ 1 : 0; | |
343 | ||
344 | if (!old || elasticity) | |
345 | get_random_bytes(&mdb->secret, sizeof(mdb->secret)); | |
346 | else | |
347 | mdb->secret = old->secret; | |
348 | ||
349 | if (!old) | |
350 | goto out; | |
351 | ||
352 | err = br_mdb_copy(mdb, old, elasticity); | |
353 | if (err) { | |
354 | kfree(mdb->mhash); | |
355 | kfree(mdb); | |
356 | return err; | |
357 | } | |
358 | ||
2ce297fc | 359 | br_mdb_rehash_seq++; |
eb1d1641 HX |
360 | call_rcu_bh(&mdb->rcu, br_mdb_free); |
361 | ||
362 | out: | |
363 | rcu_assign_pointer(*mdbp, mdb); | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
8ef2a9a5 | 368 | static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
369 | __be32 group, |
370 | u8 *igmp_type) | |
eb1d1641 | 371 | { |
5e923585 NA |
372 | struct igmpv3_query *ihv3; |
373 | size_t igmp_hdr_size; | |
eb1d1641 HX |
374 | struct sk_buff *skb; |
375 | struct igmphdr *ih; | |
376 | struct ethhdr *eth; | |
377 | struct iphdr *iph; | |
378 | ||
5e923585 NA |
379 | igmp_hdr_size = sizeof(*ih); |
380 | if (br->multicast_igmp_version == 3) | |
381 | igmp_hdr_size = sizeof(*ihv3); | |
eb1d1641 | 382 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) + |
5e923585 | 383 | igmp_hdr_size + 4); |
eb1d1641 HX |
384 | if (!skb) |
385 | goto out; | |
386 | ||
387 | skb->protocol = htons(ETH_P_IP); | |
388 | ||
389 | skb_reset_mac_header(skb); | |
390 | eth = eth_hdr(skb); | |
391 | ||
e5a727f6 | 392 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
eb1d1641 HX |
393 | eth->h_dest[0] = 1; |
394 | eth->h_dest[1] = 0; | |
395 | eth->h_dest[2] = 0x5e; | |
396 | eth->h_dest[3] = 0; | |
397 | eth->h_dest[4] = 0; | |
398 | eth->h_dest[5] = 1; | |
399 | eth->h_proto = htons(ETH_P_IP); | |
400 | skb_put(skb, sizeof(*eth)); | |
401 | ||
402 | skb_set_network_header(skb, skb->len); | |
403 | iph = ip_hdr(skb); | |
404 | ||
405 | iph->version = 4; | |
406 | iph->ihl = 6; | |
407 | iph->tos = 0xc0; | |
5e923585 | 408 | iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4); |
eb1d1641 HX |
409 | iph->id = 0; |
410 | iph->frag_off = htons(IP_DF); | |
411 | iph->ttl = 1; | |
412 | iph->protocol = IPPROTO_IGMP; | |
1c8ad5bf CW |
413 | iph->saddr = br->multicast_query_use_ifaddr ? |
414 | inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0; | |
eb1d1641 HX |
415 | iph->daddr = htonl(INADDR_ALLHOSTS_GROUP); |
416 | ((u8 *)&iph[1])[0] = IPOPT_RA; | |
417 | ((u8 *)&iph[1])[1] = 4; | |
418 | ((u8 *)&iph[1])[2] = 0; | |
419 | ((u8 *)&iph[1])[3] = 0; | |
420 | ip_send_check(iph); | |
421 | skb_put(skb, 24); | |
422 | ||
423 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 424 | *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY; |
eb1d1641 | 425 | |
5e923585 NA |
426 | switch (br->multicast_igmp_version) { |
427 | case 2: | |
428 | ih = igmp_hdr(skb); | |
429 | ih->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
430 | ih->code = (group ? br->multicast_last_member_interval : | |
431 | br->multicast_query_response_interval) / | |
432 | (HZ / IGMP_TIMER_SCALE); | |
433 | ih->group = group; | |
434 | ih->csum = 0; | |
435 | ih->csum = ip_compute_csum((void *)ih, sizeof(*ih)); | |
436 | break; | |
437 | case 3: | |
438 | ihv3 = igmpv3_query_hdr(skb); | |
439 | ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
440 | ihv3->code = (group ? br->multicast_last_member_interval : | |
441 | br->multicast_query_response_interval) / | |
442 | (HZ / IGMP_TIMER_SCALE); | |
443 | ihv3->group = group; | |
444 | ihv3->qqic = br->multicast_query_interval / HZ; | |
445 | ihv3->nsrcs = 0; | |
446 | ihv3->resv = 0; | |
447 | ihv3->suppress = 0; | |
448 | ihv3->qrv = 2; | |
449 | ihv3->csum = 0; | |
450 | ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3)); | |
451 | break; | |
452 | } | |
453 | ||
454 | skb_put(skb, igmp_hdr_size); | |
eb1d1641 HX |
455 | __skb_pull(skb, sizeof(*eth)); |
456 | ||
457 | out: | |
458 | return skb; | |
459 | } | |
460 | ||
dfd56b8b | 461 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 462 | static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
463 | const struct in6_addr *grp, |
464 | u8 *igmp_type) | |
08b202b6 | 465 | { |
aa2ae3e7 NA |
466 | struct mld2_query *mld2q; |
467 | unsigned long interval; | |
08b202b6 YH |
468 | struct ipv6hdr *ip6h; |
469 | struct mld_msg *mldq; | |
aa2ae3e7 NA |
470 | size_t mld_hdr_size; |
471 | struct sk_buff *skb; | |
08b202b6 YH |
472 | struct ethhdr *eth; |
473 | u8 *hopopt; | |
08b202b6 | 474 | |
aa2ae3e7 NA |
475 | mld_hdr_size = sizeof(*mldq); |
476 | if (br->multicast_mld_version == 2) | |
477 | mld_hdr_size = sizeof(*mld2q); | |
08b202b6 | 478 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) + |
aa2ae3e7 | 479 | 8 + mld_hdr_size); |
08b202b6 YH |
480 | if (!skb) |
481 | goto out; | |
482 | ||
483 | skb->protocol = htons(ETH_P_IPV6); | |
484 | ||
485 | /* Ethernet header */ | |
486 | skb_reset_mac_header(skb); | |
487 | eth = eth_hdr(skb); | |
488 | ||
e5a727f6 | 489 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
08b202b6 YH |
490 | eth->h_proto = htons(ETH_P_IPV6); |
491 | skb_put(skb, sizeof(*eth)); | |
492 | ||
493 | /* IPv6 header + HbH option */ | |
494 | skb_set_network_header(skb, skb->len); | |
495 | ip6h = ipv6_hdr(skb); | |
496 | ||
497 | *(__force __be32 *)ip6h = htonl(0x60000000); | |
aa2ae3e7 | 498 | ip6h->payload_len = htons(8 + mld_hdr_size); |
08b202b6 YH |
499 | ip6h->nexthdr = IPPROTO_HOPOPTS; |
500 | ip6h->hop_limit = 1; | |
a7bff75b | 501 | ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1)); |
d1d81d4c UW |
502 | if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, |
503 | &ip6h->saddr)) { | |
504 | kfree_skb(skb); | |
0888d5f3 | 505 | br->has_ipv6_addr = 0; |
d1d81d4c UW |
506 | return NULL; |
507 | } | |
0888d5f3 | 508 | |
509 | br->has_ipv6_addr = 1; | |
36cff5a1 | 510 | ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); |
08b202b6 YH |
511 | |
512 | hopopt = (u8 *)(ip6h + 1); | |
513 | hopopt[0] = IPPROTO_ICMPV6; /* next hdr */ | |
514 | hopopt[1] = 0; /* length of HbH */ | |
515 | hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */ | |
516 | hopopt[3] = 2; /* Length of RA Option */ | |
517 | hopopt[4] = 0; /* Type = 0x0000 (MLD) */ | |
518 | hopopt[5] = 0; | |
1de5a71c EZ |
519 | hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */ |
520 | hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */ | |
08b202b6 YH |
521 | |
522 | skb_put(skb, sizeof(*ip6h) + 8); | |
523 | ||
524 | /* ICMPv6 */ | |
525 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 526 | interval = ipv6_addr_any(grp) ? |
32de868c LL |
527 | br->multicast_query_response_interval : |
528 | br->multicast_last_member_interval; | |
1080ab95 | 529 | *igmp_type = ICMPV6_MGM_QUERY; |
aa2ae3e7 NA |
530 | switch (br->multicast_mld_version) { |
531 | case 1: | |
532 | mldq = (struct mld_msg *)icmp6_hdr(skb); | |
533 | mldq->mld_type = ICMPV6_MGM_QUERY; | |
534 | mldq->mld_code = 0; | |
535 | mldq->mld_cksum = 0; | |
536 | mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval)); | |
537 | mldq->mld_reserved = 0; | |
538 | mldq->mld_mca = *grp; | |
539 | mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
540 | sizeof(*mldq), IPPROTO_ICMPV6, | |
541 | csum_partial(mldq, | |
542 | sizeof(*mldq), | |
543 | 0)); | |
544 | break; | |
545 | case 2: | |
546 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
53631a5f | 547 | mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval)); |
aa2ae3e7 NA |
548 | mld2q->mld2q_type = ICMPV6_MGM_QUERY; |
549 | mld2q->mld2q_code = 0; | |
550 | mld2q->mld2q_cksum = 0; | |
551 | mld2q->mld2q_resv1 = 0; | |
552 | mld2q->mld2q_resv2 = 0; | |
553 | mld2q->mld2q_suppress = 0; | |
554 | mld2q->mld2q_qrv = 2; | |
555 | mld2q->mld2q_nsrcs = 0; | |
556 | mld2q->mld2q_qqic = br->multicast_query_interval / HZ; | |
557 | mld2q->mld2q_mca = *grp; | |
558 | mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
559 | sizeof(*mld2q), | |
560 | IPPROTO_ICMPV6, | |
561 | csum_partial(mld2q, | |
562 | sizeof(*mld2q), | |
563 | 0)); | |
564 | break; | |
565 | } | |
566 | skb_put(skb, mld_hdr_size); | |
08b202b6 YH |
567 | |
568 | __skb_pull(skb, sizeof(*eth)); | |
569 | ||
570 | out: | |
571 | return skb; | |
572 | } | |
573 | #endif | |
574 | ||
8ef2a9a5 | 575 | static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
576 | struct br_ip *addr, |
577 | u8 *igmp_type) | |
8ef2a9a5 YH |
578 | { |
579 | switch (addr->proto) { | |
580 | case htons(ETH_P_IP): | |
1080ab95 | 581 | return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type); |
dfd56b8b | 582 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 583 | case htons(ETH_P_IPV6): |
1080ab95 NA |
584 | return br_ip6_multicast_alloc_query(br, &addr->u.ip6, |
585 | igmp_type); | |
08b202b6 | 586 | #endif |
8ef2a9a5 YH |
587 | } |
588 | return NULL; | |
589 | } | |
590 | ||
eb1d1641 | 591 | static struct net_bridge_mdb_entry *br_multicast_get_group( |
8ef2a9a5 YH |
592 | struct net_bridge *br, struct net_bridge_port *port, |
593 | struct br_ip *group, int hash) | |
eb1d1641 | 594 | { |
e8051688 | 595 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 | 596 | struct net_bridge_mdb_entry *mp; |
95c96174 ED |
597 | unsigned int count = 0; |
598 | unsigned int max; | |
eb1d1641 HX |
599 | int elasticity; |
600 | int err; | |
601 | ||
e8051688 | 602 | mdb = rcu_dereference_protected(br->mdb, 1); |
b67bfe0d | 603 | hlist_for_each_entry(mp, &mdb->mhash[hash], hlist[mdb->ver]) { |
eb1d1641 | 604 | count++; |
8ef2a9a5 | 605 | if (unlikely(br_ip_equal(group, &mp->addr))) |
eb1d1641 | 606 | return mp; |
eb1d1641 HX |
607 | } |
608 | ||
609 | elasticity = 0; | |
610 | max = mdb->max; | |
611 | ||
612 | if (unlikely(count > br->hash_elasticity && count)) { | |
613 | if (net_ratelimit()) | |
28a16c97 | 614 | br_info(br, "Multicast hash table " |
615 | "chain limit reached: %s\n", | |
616 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
617 | |
618 | elasticity = br->hash_elasticity; | |
619 | } | |
620 | ||
621 | if (mdb->size >= max) { | |
622 | max *= 2; | |
036be6db TG |
623 | if (unlikely(max > br->hash_max)) { |
624 | br_warn(br, "Multicast hash table maximum of %d " | |
625 | "reached, disabling snooping: %s\n", | |
626 | br->hash_max, | |
627 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
628 | err = -E2BIG; |
629 | disable: | |
630 | br->multicast_disabled = 1; | |
631 | goto err; | |
632 | } | |
633 | } | |
634 | ||
635 | if (max > mdb->max || elasticity) { | |
636 | if (mdb->old) { | |
637 | if (net_ratelimit()) | |
28a16c97 | 638 | br_info(br, "Multicast hash table " |
639 | "on fire: %s\n", | |
640 | port ? port->dev->name : br->dev->name); | |
eb1d1641 HX |
641 | err = -EEXIST; |
642 | goto err; | |
643 | } | |
644 | ||
645 | err = br_mdb_rehash(&br->mdb, max, elasticity); | |
646 | if (err) { | |
28a16c97 | 647 | br_warn(br, "Cannot rehash multicast " |
648 | "hash table, disabling snooping: %s, %d, %d\n", | |
649 | port ? port->dev->name : br->dev->name, | |
650 | mdb->size, err); | |
eb1d1641 HX |
651 | goto disable; |
652 | } | |
653 | ||
654 | err = -EAGAIN; | |
655 | goto err; | |
656 | } | |
657 | ||
658 | return NULL; | |
659 | ||
660 | err: | |
661 | mp = ERR_PTR(err); | |
662 | return mp; | |
663 | } | |
664 | ||
cfd56754 | 665 | struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, |
5e923585 NA |
666 | struct net_bridge_port *p, |
667 | struct br_ip *group) | |
eb1d1641 | 668 | { |
e8051688 | 669 | struct net_bridge_mdb_htable *mdb; |
eb1d1641 HX |
670 | struct net_bridge_mdb_entry *mp; |
671 | int hash; | |
4c0833bc | 672 | int err; |
eb1d1641 | 673 | |
e8051688 | 674 | mdb = rcu_dereference_protected(br->mdb, 1); |
eb1d1641 | 675 | if (!mdb) { |
4c0833bc TK |
676 | err = br_mdb_rehash(&br->mdb, BR_HASH_SIZE, 0); |
677 | if (err) | |
678 | return ERR_PTR(err); | |
eb1d1641 HX |
679 | goto rehash; |
680 | } | |
681 | ||
682 | hash = br_ip_hash(mdb, group); | |
5e923585 | 683 | mp = br_multicast_get_group(br, p, group, hash); |
eb1d1641 HX |
684 | switch (PTR_ERR(mp)) { |
685 | case 0: | |
686 | break; | |
687 | ||
688 | case -EAGAIN: | |
689 | rehash: | |
e8051688 | 690 | mdb = rcu_dereference_protected(br->mdb, 1); |
eb1d1641 HX |
691 | hash = br_ip_hash(mdb, group); |
692 | break; | |
693 | ||
694 | default: | |
695 | goto out; | |
696 | } | |
697 | ||
698 | mp = kzalloc(sizeof(*mp), GFP_ATOMIC); | |
699 | if (unlikely(!mp)) | |
4c0833bc | 700 | return ERR_PTR(-ENOMEM); |
eb1d1641 HX |
701 | |
702 | mp->br = br; | |
8ef2a9a5 | 703 | mp->addr = *group; |
1faabf2a ED |
704 | setup_timer(&mp->timer, br_multicast_group_expired, |
705 | (unsigned long)mp); | |
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 CW |
731 | hlist_add_head(&p->mglist, &port->mglist); |
732 | setup_timer(&p->timer, br_multicast_port_group_expired, | |
733 | (unsigned long)p); | |
6db6f0ea FF |
734 | |
735 | if (src) | |
736 | memcpy(p->eth_addr, src, ETH_ALEN); | |
737 | else | |
738 | memset(p->eth_addr, 0xff, ETH_ALEN); | |
739 | ||
cfd56754 CW |
740 | return p; |
741 | } | |
742 | ||
6db6f0ea FF |
743 | static bool br_port_group_equal(struct net_bridge_port_group *p, |
744 | struct net_bridge_port *port, | |
745 | const unsigned char *src) | |
746 | { | |
747 | if (p->port != port) | |
748 | return false; | |
749 | ||
750 | if (!(port->flags & BR_MULTICAST_TO_UNICAST)) | |
751 | return true; | |
752 | ||
753 | return ether_addr_equal(src, p->eth_addr); | |
754 | } | |
755 | ||
eb1d1641 | 756 | static int br_multicast_add_group(struct net_bridge *br, |
8ef2a9a5 | 757 | struct net_bridge_port *port, |
6db6f0ea FF |
758 | struct br_ip *group, |
759 | const unsigned char *src) | |
eb1d1641 | 760 | { |
e8051688 | 761 | struct net_bridge_port_group __rcu **pp; |
5e923585 NA |
762 | struct net_bridge_port_group *p; |
763 | struct net_bridge_mdb_entry *mp; | |
454594f3 | 764 | unsigned long now = jiffies; |
eb1d1641 HX |
765 | int err; |
766 | ||
eb1d1641 HX |
767 | spin_lock(&br->multicast_lock); |
768 | if (!netif_running(br->dev) || | |
769 | (port && port->state == BR_STATE_DISABLED)) | |
770 | goto out; | |
771 | ||
772 | mp = br_multicast_new_group(br, port, group); | |
773 | err = PTR_ERR(mp); | |
4c0833bc | 774 | if (IS_ERR(mp)) |
eb1d1641 HX |
775 | goto err; |
776 | ||
777 | if (!port) { | |
8a870178 | 778 | mp->mglist = true; |
454594f3 | 779 | mod_timer(&mp->timer, now + br->multicast_membership_interval); |
eb1d1641 HX |
780 | goto out; |
781 | } | |
782 | ||
e8051688 ED |
783 | for (pp = &mp->ports; |
784 | (p = mlock_dereference(*pp, br)) != NULL; | |
785 | pp = &p->next) { | |
6db6f0ea | 786 | if (br_port_group_equal(p, port, src)) |
454594f3 | 787 | goto found; |
eb1d1641 HX |
788 | if ((unsigned long)p->port < (unsigned long)port) |
789 | break; | |
790 | } | |
791 | ||
6db6f0ea | 792 | p = br_multicast_new_port_group(port, group, *pp, 0, src); |
eb1d1641 HX |
793 | if (unlikely(!p)) |
794 | goto err; | |
eb1d1641 | 795 | rcu_assign_pointer(*pp, p); |
45ebcce5 | 796 | br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0); |
eb1d1641 | 797 | |
454594f3 LL |
798 | found: |
799 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
eb1d1641 HX |
800 | out: |
801 | err = 0; | |
802 | ||
803 | err: | |
804 | spin_unlock(&br->multicast_lock); | |
805 | return err; | |
806 | } | |
807 | ||
8ef2a9a5 YH |
808 | static int br_ip4_multicast_add_group(struct net_bridge *br, |
809 | struct net_bridge_port *port, | |
b0e9a30d | 810 | __be32 group, |
6db6f0ea FF |
811 | __u16 vid, |
812 | const unsigned char *src) | |
8ef2a9a5 YH |
813 | { |
814 | struct br_ip br_group; | |
815 | ||
816 | if (ipv4_is_local_multicast(group)) | |
817 | return 0; | |
818 | ||
819 | br_group.u.ip4 = group; | |
820 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 821 | br_group.vid = vid; |
8ef2a9a5 | 822 | |
6db6f0ea | 823 | return br_multicast_add_group(br, port, &br_group, src); |
8ef2a9a5 YH |
824 | } |
825 | ||
dfd56b8b | 826 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
827 | static int br_ip6_multicast_add_group(struct net_bridge *br, |
828 | struct net_bridge_port *port, | |
b0e9a30d | 829 | const struct in6_addr *group, |
6db6f0ea FF |
830 | __u16 vid, |
831 | const unsigned char *src) | |
08b202b6 YH |
832 | { |
833 | struct br_ip br_group; | |
834 | ||
3c3769e6 | 835 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
836 | return 0; |
837 | ||
4e3fd7a0 | 838 | br_group.u.ip6 = *group; |
9cc6e0c4 | 839 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 840 | br_group.vid = vid; |
08b202b6 | 841 | |
6db6f0ea | 842 | return br_multicast_add_group(br, port, &br_group, src); |
08b202b6 YH |
843 | } |
844 | #endif | |
845 | ||
eb1d1641 HX |
846 | static void br_multicast_router_expired(unsigned long data) |
847 | { | |
848 | struct net_bridge_port *port = (void *)data; | |
849 | struct net_bridge *br = port->br; | |
850 | ||
851 | spin_lock(&br->multicast_lock); | |
a55d8246 NA |
852 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
853 | port->multicast_router == MDB_RTR_TYPE_PERM || | |
f12e7d95 | 854 | timer_pending(&port->multicast_router_timer)) |
eb1d1641 HX |
855 | goto out; |
856 | ||
f12e7d95 | 857 | __del_port_router(port); |
eb1d1641 HX |
858 | out: |
859 | spin_unlock(&br->multicast_lock); | |
860 | } | |
861 | ||
862 | static void br_multicast_local_router_expired(unsigned long data) | |
863 | { | |
864 | } | |
865 | ||
cc0fdd80 | 866 | static void br_multicast_querier_expired(struct net_bridge *br, |
90010b36 | 867 | struct bridge_mcast_own_query *query) |
c83b8fab | 868 | { |
c83b8fab HX |
869 | spin_lock(&br->multicast_lock); |
870 | if (!netif_running(br->dev) || br->multicast_disabled) | |
871 | goto out; | |
872 | ||
cc0fdd80 | 873 | br_multicast_start_querier(br, query); |
c83b8fab HX |
874 | |
875 | out: | |
876 | spin_unlock(&br->multicast_lock); | |
877 | } | |
878 | ||
cc0fdd80 LL |
879 | static void br_ip4_multicast_querier_expired(unsigned long data) |
880 | { | |
881 | struct net_bridge *br = (void *)data; | |
882 | ||
90010b36 | 883 | br_multicast_querier_expired(br, &br->ip4_own_query); |
cc0fdd80 LL |
884 | } |
885 | ||
886 | #if IS_ENABLED(CONFIG_IPV6) | |
887 | static void br_ip6_multicast_querier_expired(unsigned long data) | |
888 | { | |
889 | struct net_bridge *br = (void *)data; | |
890 | ||
90010b36 | 891 | br_multicast_querier_expired(br, &br->ip6_own_query); |
cc0fdd80 LL |
892 | } |
893 | #endif | |
894 | ||
dc4eb53a LL |
895 | static void br_multicast_select_own_querier(struct net_bridge *br, |
896 | struct br_ip *ip, | |
897 | struct sk_buff *skb) | |
898 | { | |
899 | if (ip->proto == htons(ETH_P_IP)) | |
900 | br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr; | |
901 | #if IS_ENABLED(CONFIG_IPV6) | |
902 | else | |
903 | br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr; | |
904 | #endif | |
905 | } | |
906 | ||
8ef2a9a5 YH |
907 | static void __br_multicast_send_query(struct net_bridge *br, |
908 | struct net_bridge_port *port, | |
909 | struct br_ip *ip) | |
eb1d1641 | 910 | { |
eb1d1641 | 911 | struct sk_buff *skb; |
1080ab95 | 912 | u8 igmp_type; |
eb1d1641 | 913 | |
1080ab95 | 914 | skb = br_multicast_alloc_query(br, ip, &igmp_type); |
eb1d1641 | 915 | if (!skb) |
8ef2a9a5 | 916 | return; |
eb1d1641 HX |
917 | |
918 | if (port) { | |
eb1d1641 | 919 | skb->dev = port->dev; |
a65056ec | 920 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 921 | BR_MCAST_DIR_TX); |
29a26a56 EB |
922 | NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, |
923 | dev_net(port->dev), NULL, skb, NULL, skb->dev, | |
f0b4eece | 924 | br_dev_queue_push_xmit); |
dc4eb53a LL |
925 | } else { |
926 | br_multicast_select_own_querier(br, ip, skb); | |
a65056ec | 927 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 928 | BR_MCAST_DIR_RX); |
eb1d1641 | 929 | netif_rx(skb); |
dc4eb53a | 930 | } |
8ef2a9a5 YH |
931 | } |
932 | ||
933 | static void br_multicast_send_query(struct net_bridge *br, | |
cc0fdd80 | 934 | struct net_bridge_port *port, |
90010b36 | 935 | struct bridge_mcast_own_query *own_query) |
8ef2a9a5 | 936 | { |
90010b36 | 937 | struct bridge_mcast_other_query *other_query = NULL; |
5e923585 NA |
938 | struct br_ip br_group; |
939 | unsigned long time; | |
8ef2a9a5 YH |
940 | |
941 | if (!netif_running(br->dev) || br->multicast_disabled || | |
cc0fdd80 | 942 | !br->multicast_querier) |
8ef2a9a5 YH |
943 | return; |
944 | ||
08b202b6 YH |
945 | memset(&br_group.u, 0, sizeof(br_group.u)); |
946 | ||
90010b36 LL |
947 | if (port ? (own_query == &port->ip4_own_query) : |
948 | (own_query == &br->ip4_own_query)) { | |
949 | other_query = &br->ip4_other_query; | |
cc0fdd80 | 950 | br_group.proto = htons(ETH_P_IP); |
dfd56b8b | 951 | #if IS_ENABLED(CONFIG_IPV6) |
cc0fdd80 | 952 | } else { |
90010b36 | 953 | other_query = &br->ip6_other_query; |
cc0fdd80 | 954 | br_group.proto = htons(ETH_P_IPV6); |
08b202b6 | 955 | #endif |
cc0fdd80 LL |
956 | } |
957 | ||
90010b36 | 958 | if (!other_query || timer_pending(&other_query->timer)) |
cc0fdd80 LL |
959 | return; |
960 | ||
961 | __br_multicast_send_query(br, port, &br_group); | |
eb1d1641 | 962 | |
eb1d1641 | 963 | time = jiffies; |
90010b36 | 964 | time += own_query->startup_sent < br->multicast_startup_query_count ? |
eb1d1641 HX |
965 | br->multicast_startup_query_interval : |
966 | br->multicast_query_interval; | |
90010b36 | 967 | mod_timer(&own_query->timer, time); |
eb1d1641 HX |
968 | } |
969 | ||
90010b36 LL |
970 | static void |
971 | br_multicast_port_query_expired(struct net_bridge_port *port, | |
972 | struct bridge_mcast_own_query *query) | |
eb1d1641 | 973 | { |
eb1d1641 HX |
974 | struct net_bridge *br = port->br; |
975 | ||
976 | spin_lock(&br->multicast_lock); | |
02a780c0 DC |
977 | if (port->state == BR_STATE_DISABLED || |
978 | port->state == BR_STATE_BLOCKING) | |
eb1d1641 HX |
979 | goto out; |
980 | ||
cc0fdd80 LL |
981 | if (query->startup_sent < br->multicast_startup_query_count) |
982 | query->startup_sent++; | |
eb1d1641 | 983 | |
cc0fdd80 | 984 | br_multicast_send_query(port->br, port, query); |
eb1d1641 HX |
985 | |
986 | out: | |
987 | spin_unlock(&br->multicast_lock); | |
988 | } | |
989 | ||
cc0fdd80 LL |
990 | static void br_ip4_multicast_port_query_expired(unsigned long data) |
991 | { | |
992 | struct net_bridge_port *port = (void *)data; | |
993 | ||
90010b36 | 994 | br_multicast_port_query_expired(port, &port->ip4_own_query); |
cc0fdd80 LL |
995 | } |
996 | ||
997 | #if IS_ENABLED(CONFIG_IPV6) | |
998 | static void br_ip6_multicast_port_query_expired(unsigned long data) | |
999 | { | |
1000 | struct net_bridge_port *port = (void *)data; | |
1001 | ||
90010b36 | 1002 | br_multicast_port_query_expired(port, &port->ip6_own_query); |
cc0fdd80 LL |
1003 | } |
1004 | #endif | |
1005 | ||
147c1e9b NF |
1006 | static void br_mc_disabled_update(struct net_device *dev, bool value) |
1007 | { | |
1008 | struct switchdev_attr attr = { | |
1009 | .orig_dev = dev, | |
1010 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED, | |
1011 | .flags = SWITCHDEV_F_DEFER, | |
1012 | .u.mc_disabled = value, | |
1013 | }; | |
1014 | ||
1015 | switchdev_port_attr_set(dev, &attr); | |
1016 | } | |
1017 | ||
1080ab95 | 1018 | int br_multicast_add_port(struct net_bridge_port *port) |
eb1d1641 | 1019 | { |
7f0aec7a | 1020 | port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
eb1d1641 HX |
1021 | |
1022 | setup_timer(&port->multicast_router_timer, br_multicast_router_expired, | |
1023 | (unsigned long)port); | |
90010b36 LL |
1024 | setup_timer(&port->ip4_own_query.timer, |
1025 | br_ip4_multicast_port_query_expired, (unsigned long)port); | |
cc0fdd80 | 1026 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 LL |
1027 | setup_timer(&port->ip6_own_query.timer, |
1028 | br_ip6_multicast_port_query_expired, (unsigned long)port); | |
cc0fdd80 | 1029 | #endif |
147c1e9b NF |
1030 | br_mc_disabled_update(port->dev, port->br->multicast_disabled); |
1031 | ||
1080ab95 NA |
1032 | port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); |
1033 | if (!port->mcast_stats) | |
1034 | return -ENOMEM; | |
1035 | ||
1036 | return 0; | |
eb1d1641 HX |
1037 | } |
1038 | ||
1039 | void br_multicast_del_port(struct net_bridge_port *port) | |
1040 | { | |
e10177ab SA |
1041 | struct net_bridge *br = port->br; |
1042 | struct net_bridge_port_group *pg; | |
1043 | struct hlist_node *n; | |
1044 | ||
1045 | /* Take care of the remaining groups, only perm ones should be left */ | |
1046 | spin_lock_bh(&br->multicast_lock); | |
1047 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) | |
1048 | br_multicast_del_pg(br, pg); | |
1049 | spin_unlock_bh(&br->multicast_lock); | |
eb1d1641 | 1050 | del_timer_sync(&port->multicast_router_timer); |
1080ab95 | 1051 | free_percpu(port->mcast_stats); |
eb1d1641 HX |
1052 | } |
1053 | ||
90010b36 | 1054 | static void br_multicast_enable(struct bridge_mcast_own_query *query) |
561f1103 | 1055 | { |
cc0fdd80 | 1056 | query->startup_sent = 0; |
561f1103 | 1057 | |
cc0fdd80 LL |
1058 | if (try_to_del_timer_sync(&query->timer) >= 0 || |
1059 | del_timer(&query->timer)) | |
1060 | mod_timer(&query->timer, jiffies); | |
561f1103 HX |
1061 | } |
1062 | ||
7cb3f921 | 1063 | static void __br_multicast_enable_port(struct net_bridge_port *port) |
eb1d1641 HX |
1064 | { |
1065 | struct net_bridge *br = port->br; | |
1066 | ||
eb1d1641 | 1067 | if (br->multicast_disabled || !netif_running(br->dev)) |
7cb3f921 | 1068 | return; |
eb1d1641 | 1069 | |
90010b36 | 1070 | br_multicast_enable(&port->ip4_own_query); |
cc0fdd80 | 1071 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1072 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 1073 | #endif |
7f0aec7a NA |
1074 | if (port->multicast_router == MDB_RTR_TYPE_PERM && |
1075 | hlist_unhashed(&port->rlist)) | |
754bc547 | 1076 | br_multicast_add_router(br, port); |
7cb3f921 | 1077 | } |
eb1d1641 | 1078 | |
7cb3f921 NA |
1079 | void br_multicast_enable_port(struct net_bridge_port *port) |
1080 | { | |
1081 | struct net_bridge *br = port->br; | |
1082 | ||
1083 | spin_lock(&br->multicast_lock); | |
1084 | __br_multicast_enable_port(port); | |
eb1d1641 HX |
1085 | spin_unlock(&br->multicast_lock); |
1086 | } | |
1087 | ||
1088 | void br_multicast_disable_port(struct net_bridge_port *port) | |
1089 | { | |
1090 | struct net_bridge *br = port->br; | |
1091 | struct net_bridge_port_group *pg; | |
b67bfe0d | 1092 | struct hlist_node *n; |
eb1d1641 HX |
1093 | |
1094 | spin_lock(&br->multicast_lock); | |
b67bfe0d | 1095 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) |
9d06b6d8 | 1096 | if (!(pg->flags & MDB_PG_FLAGS_PERMANENT)) |
e10177ab | 1097 | br_multicast_del_pg(br, pg); |
eb1d1641 | 1098 | |
f12e7d95 NF |
1099 | __del_port_router(port); |
1100 | ||
eb1d1641 | 1101 | del_timer(&port->multicast_router_timer); |
90010b36 | 1102 | del_timer(&port->ip4_own_query.timer); |
cc0fdd80 | 1103 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1104 | del_timer(&port->ip6_own_query.timer); |
cc0fdd80 | 1105 | #endif |
eb1d1641 HX |
1106 | spin_unlock(&br->multicast_lock); |
1107 | } | |
1108 | ||
8ef2a9a5 YH |
1109 | static int br_ip4_multicast_igmp3_report(struct net_bridge *br, |
1110 | struct net_bridge_port *port, | |
06499098 VY |
1111 | struct sk_buff *skb, |
1112 | u16 vid) | |
eb1d1641 | 1113 | { |
6db6f0ea | 1114 | const unsigned char *src; |
eb1d1641 HX |
1115 | struct igmpv3_report *ih; |
1116 | struct igmpv3_grec *grec; | |
1117 | int i; | |
1118 | int len; | |
1119 | int num; | |
1120 | int type; | |
1121 | int err = 0; | |
1122 | __be32 group; | |
1123 | ||
eb1d1641 HX |
1124 | ih = igmpv3_report_hdr(skb); |
1125 | num = ntohs(ih->ngrec); | |
c2d4fbd2 | 1126 | len = skb_transport_offset(skb) + sizeof(*ih); |
eb1d1641 HX |
1127 | |
1128 | for (i = 0; i < num; i++) { | |
1129 | len += sizeof(*grec); | |
1130 | if (!pskb_may_pull(skb, len)) | |
1131 | return -EINVAL; | |
1132 | ||
fd218cf9 | 1133 | grec = (void *)(skb->data + len - sizeof(*grec)); |
eb1d1641 HX |
1134 | group = grec->grec_mca; |
1135 | type = grec->grec_type; | |
1136 | ||
8eabf95c | 1137 | len += ntohs(grec->grec_nsrcs) * 4; |
eb1d1641 HX |
1138 | if (!pskb_may_pull(skb, len)) |
1139 | return -EINVAL; | |
1140 | ||
1141 | /* We treat this as an IGMPv2 report for now. */ | |
1142 | switch (type) { | |
1143 | case IGMPV3_MODE_IS_INCLUDE: | |
1144 | case IGMPV3_MODE_IS_EXCLUDE: | |
1145 | case IGMPV3_CHANGE_TO_INCLUDE: | |
1146 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
1147 | case IGMPV3_ALLOW_NEW_SOURCES: | |
1148 | case IGMPV3_BLOCK_OLD_SOURCES: | |
1149 | break; | |
1150 | ||
1151 | default: | |
1152 | continue; | |
1153 | } | |
1154 | ||
6db6f0ea | 1155 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
1156 | if ((type == IGMPV3_CHANGE_TO_INCLUDE || |
1157 | type == IGMPV3_MODE_IS_INCLUDE) && | |
1158 | ntohs(grec->grec_nsrcs) == 0) { | |
6db6f0ea | 1159 | br_ip4_multicast_leave_group(br, port, group, vid, src); |
bc8c20ac | 1160 | } else { |
6db6f0ea FF |
1161 | err = br_ip4_multicast_add_group(br, port, group, vid, |
1162 | src); | |
bc8c20ac SA |
1163 | if (err) |
1164 | break; | |
1165 | } | |
eb1d1641 HX |
1166 | } |
1167 | ||
1168 | return err; | |
1169 | } | |
1170 | ||
dfd56b8b | 1171 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1172 | static int br_ip6_multicast_mld2_report(struct net_bridge *br, |
1173 | struct net_bridge_port *port, | |
06499098 VY |
1174 | struct sk_buff *skb, |
1175 | u16 vid) | |
08b202b6 | 1176 | { |
6db6f0ea | 1177 | const unsigned char *src; |
08b202b6 YH |
1178 | struct icmp6hdr *icmp6h; |
1179 | struct mld2_grec *grec; | |
1180 | int i; | |
1181 | int len; | |
1182 | int num; | |
1183 | int err = 0; | |
1184 | ||
1185 | if (!pskb_may_pull(skb, sizeof(*icmp6h))) | |
1186 | return -EINVAL; | |
1187 | ||
1188 | icmp6h = icmp6_hdr(skb); | |
1189 | num = ntohs(icmp6h->icmp6_dataun.un_data16[1]); | |
c2d4fbd2 | 1190 | len = skb_transport_offset(skb) + sizeof(*icmp6h); |
08b202b6 YH |
1191 | |
1192 | for (i = 0; i < num; i++) { | |
1193 | __be16 *nsrcs, _nsrcs; | |
1194 | ||
1195 | nsrcs = skb_header_pointer(skb, | |
1196 | len + offsetof(struct mld2_grec, | |
649e984d | 1197 | grec_nsrcs), |
08b202b6 YH |
1198 | sizeof(_nsrcs), &_nsrcs); |
1199 | if (!nsrcs) | |
1200 | return -EINVAL; | |
1201 | ||
1202 | if (!pskb_may_pull(skb, | |
1203 | len + sizeof(*grec) + | |
d41db9f3 | 1204 | sizeof(struct in6_addr) * ntohs(*nsrcs))) |
08b202b6 YH |
1205 | return -EINVAL; |
1206 | ||
1207 | grec = (struct mld2_grec *)(skb->data + len); | |
d41db9f3 LL |
1208 | len += sizeof(*grec) + |
1209 | sizeof(struct in6_addr) * ntohs(*nsrcs); | |
08b202b6 YH |
1210 | |
1211 | /* We treat these as MLDv1 reports for now. */ | |
1212 | switch (grec->grec_type) { | |
1213 | case MLD2_MODE_IS_INCLUDE: | |
1214 | case MLD2_MODE_IS_EXCLUDE: | |
1215 | case MLD2_CHANGE_TO_INCLUDE: | |
1216 | case MLD2_CHANGE_TO_EXCLUDE: | |
1217 | case MLD2_ALLOW_NEW_SOURCES: | |
1218 | case MLD2_BLOCK_OLD_SOURCES: | |
1219 | break; | |
1220 | ||
1221 | default: | |
1222 | continue; | |
1223 | } | |
1224 | ||
6db6f0ea | 1225 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
1226 | if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE || |
1227 | grec->grec_type == MLD2_MODE_IS_INCLUDE) && | |
1228 | ntohs(*nsrcs) == 0) { | |
1229 | br_ip6_multicast_leave_group(br, port, &grec->grec_mca, | |
6db6f0ea | 1230 | vid, src); |
bc8c20ac SA |
1231 | } else { |
1232 | err = br_ip6_multicast_add_group(br, port, | |
6db6f0ea FF |
1233 | &grec->grec_mca, vid, |
1234 | src); | |
9264251e | 1235 | if (err) |
bc8c20ac SA |
1236 | break; |
1237 | } | |
08b202b6 YH |
1238 | } |
1239 | ||
1240 | return err; | |
1241 | } | |
1242 | #endif | |
1243 | ||
dc4eb53a | 1244 | static bool br_ip4_multicast_select_querier(struct net_bridge *br, |
2cd41431 | 1245 | struct net_bridge_port *port, |
dc4eb53a LL |
1246 | __be32 saddr) |
1247 | { | |
1248 | if (!timer_pending(&br->ip4_own_query.timer) && | |
1249 | !timer_pending(&br->ip4_other_query.timer)) | |
1250 | goto update; | |
1251 | ||
1252 | if (!br->ip4_querier.addr.u.ip4) | |
1253 | goto update; | |
1254 | ||
1255 | if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4)) | |
1256 | goto update; | |
1257 | ||
1258 | return false; | |
1259 | ||
1260 | update: | |
1261 | br->ip4_querier.addr.u.ip4 = saddr; | |
1262 | ||
2cd41431 LL |
1263 | /* update protected by general multicast_lock by caller */ |
1264 | rcu_assign_pointer(br->ip4_querier.port, port); | |
1265 | ||
dc4eb53a LL |
1266 | return true; |
1267 | } | |
1268 | ||
1269 | #if IS_ENABLED(CONFIG_IPV6) | |
1270 | static bool br_ip6_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1271 | struct net_bridge_port *port, |
dc4eb53a LL |
1272 | struct in6_addr *saddr) |
1273 | { | |
1274 | if (!timer_pending(&br->ip6_own_query.timer) && | |
1275 | !timer_pending(&br->ip6_other_query.timer)) | |
1276 | goto update; | |
1277 | ||
1278 | if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0) | |
1279 | goto update; | |
1280 | ||
1281 | return false; | |
1282 | ||
1283 | update: | |
1284 | br->ip6_querier.addr.u.ip6 = *saddr; | |
1285 | ||
2cd41431 LL |
1286 | /* update protected by general multicast_lock by caller */ |
1287 | rcu_assign_pointer(br->ip6_querier.port, port); | |
1288 | ||
dc4eb53a LL |
1289 | return true; |
1290 | } | |
1291 | #endif | |
1292 | ||
1293 | static bool br_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1294 | struct net_bridge_port *port, |
dc4eb53a LL |
1295 | struct br_ip *saddr) |
1296 | { | |
1297 | switch (saddr->proto) { | |
1298 | case htons(ETH_P_IP): | |
2cd41431 | 1299 | return br_ip4_multicast_select_querier(br, port, saddr->u.ip4); |
dc4eb53a LL |
1300 | #if IS_ENABLED(CONFIG_IPV6) |
1301 | case htons(ETH_P_IPV6): | |
2cd41431 | 1302 | return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6); |
dc4eb53a LL |
1303 | #endif |
1304 | } | |
1305 | ||
1306 | return false; | |
1307 | } | |
1308 | ||
cc0fdd80 | 1309 | static void |
90010b36 LL |
1310 | br_multicast_update_query_timer(struct net_bridge *br, |
1311 | struct bridge_mcast_other_query *query, | |
1312 | unsigned long max_delay) | |
b00589af | 1313 | { |
90010b36 LL |
1314 | if (!timer_pending(&query->timer)) |
1315 | query->delay_time = jiffies + max_delay; | |
b00589af | 1316 | |
90010b36 | 1317 | mod_timer(&query->timer, jiffies + br->multicast_querier_interval); |
b00589af LL |
1318 | } |
1319 | ||
6d549648 NF |
1320 | static void br_port_mc_router_state_change(struct net_bridge_port *p, |
1321 | bool is_mc_router) | |
1322 | { | |
1323 | struct switchdev_attr attr = { | |
1324 | .orig_dev = p->dev, | |
1325 | .id = SWITCHDEV_ATTR_ID_PORT_MROUTER, | |
1326 | .flags = SWITCHDEV_F_DEFER, | |
1327 | .u.mrouter = is_mc_router, | |
1328 | }; | |
1329 | ||
1330 | switchdev_port_attr_set(p->dev, &attr); | |
1331 | } | |
1332 | ||
7e80c124 | 1333 | /* |
7c77602f | 1334 | * Add port to router_list |
7e80c124 | 1335 | * list is maintained ordered by pointer value |
1336 | * and locked by br->multicast_lock and RCU | |
1337 | */ | |
0909e117 HX |
1338 | static void br_multicast_add_router(struct net_bridge *br, |
1339 | struct net_bridge_port *port) | |
1340 | { | |
dcdca2c4 | 1341 | struct net_bridge_port *p; |
b67bfe0d | 1342 | struct hlist_node *slot = NULL; |
dcdca2c4 | 1343 | |
1a040eac NA |
1344 | if (!hlist_unhashed(&port->rlist)) |
1345 | return; | |
1346 | ||
b67bfe0d | 1347 | hlist_for_each_entry(p, &br->router_list, rlist) { |
7e80c124 | 1348 | if ((unsigned long) port >= (unsigned long) p) |
1349 | break; | |
b67bfe0d | 1350 | slot = &p->rlist; |
dcdca2c4 | 1351 | } |
1352 | ||
7e80c124 | 1353 | if (slot) |
1d023284 | 1354 | hlist_add_behind_rcu(&port->rlist, slot); |
dcdca2c4 | 1355 | else |
1356 | hlist_add_head_rcu(&port->rlist, &br->router_list); | |
949f1e39 | 1357 | br_rtr_notify(br->dev, port, RTM_NEWMDB); |
6d549648 | 1358 | br_port_mc_router_state_change(port, true); |
0909e117 HX |
1359 | } |
1360 | ||
eb1d1641 HX |
1361 | static void br_multicast_mark_router(struct net_bridge *br, |
1362 | struct net_bridge_port *port) | |
1363 | { | |
1364 | unsigned long now = jiffies; | |
eb1d1641 HX |
1365 | |
1366 | if (!port) { | |
7f0aec7a | 1367 | if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) |
eb1d1641 HX |
1368 | mod_timer(&br->multicast_router_timer, |
1369 | now + br->multicast_querier_interval); | |
1370 | return; | |
1371 | } | |
1372 | ||
a55d8246 NA |
1373 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
1374 | port->multicast_router == MDB_RTR_TYPE_PERM) | |
eb1d1641 HX |
1375 | return; |
1376 | ||
0909e117 | 1377 | br_multicast_add_router(br, port); |
eb1d1641 | 1378 | |
eb1d1641 HX |
1379 | mod_timer(&port->multicast_router_timer, |
1380 | now + br->multicast_querier_interval); | |
1381 | } | |
1382 | ||
1383 | static void br_multicast_query_received(struct net_bridge *br, | |
1384 | struct net_bridge_port *port, | |
90010b36 | 1385 | struct bridge_mcast_other_query *query, |
dc4eb53a | 1386 | struct br_ip *saddr, |
b00589af | 1387 | unsigned long max_delay) |
eb1d1641 | 1388 | { |
2cd41431 | 1389 | if (!br_multicast_select_querier(br, port, saddr)) |
eb1d1641 HX |
1390 | return; |
1391 | ||
dc4eb53a | 1392 | br_multicast_update_query_timer(br, query, max_delay); |
eb1d1641 HX |
1393 | br_multicast_mark_router(br, port); |
1394 | } | |
1395 | ||
8ef2a9a5 YH |
1396 | static int br_ip4_multicast_query(struct net_bridge *br, |
1397 | struct net_bridge_port *port, | |
06499098 VY |
1398 | struct sk_buff *skb, |
1399 | u16 vid) | |
eb1d1641 | 1400 | { |
b71d1d42 | 1401 | const struct iphdr *iph = ip_hdr(skb); |
eb1d1641 HX |
1402 | struct igmphdr *ih = igmp_hdr(skb); |
1403 | struct net_bridge_mdb_entry *mp; | |
1404 | struct igmpv3_query *ih3; | |
1405 | struct net_bridge_port_group *p; | |
e8051688 | 1406 | struct net_bridge_port_group __rcu **pp; |
dc4eb53a | 1407 | struct br_ip saddr; |
eb1d1641 HX |
1408 | unsigned long max_delay; |
1409 | unsigned long now = jiffies; | |
856ce5d0 | 1410 | unsigned int offset = skb_transport_offset(skb); |
eb1d1641 | 1411 | __be32 group; |
bec68ff1 | 1412 | int err = 0; |
eb1d1641 HX |
1413 | |
1414 | spin_lock(&br->multicast_lock); | |
1415 | if (!netif_running(br->dev) || | |
1416 | (port && port->state == BR_STATE_DISABLED)) | |
1417 | goto out; | |
1418 | ||
eb1d1641 HX |
1419 | group = ih->group; |
1420 | ||
856ce5d0 | 1421 | if (skb->len == offset + sizeof(*ih)) { |
eb1d1641 HX |
1422 | max_delay = ih->code * (HZ / IGMP_TIMER_SCALE); |
1423 | ||
1424 | if (!max_delay) { | |
1425 | max_delay = 10 * HZ; | |
1426 | group = 0; | |
1427 | } | |
856ce5d0 | 1428 | } else if (skb->len >= offset + sizeof(*ih3)) { |
eb1d1641 HX |
1429 | ih3 = igmpv3_query_hdr(skb); |
1430 | if (ih3->nsrcs) | |
bec68ff1 | 1431 | goto out; |
eb1d1641 | 1432 | |
0ba8c9ec YH |
1433 | max_delay = ih3->code ? |
1434 | IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1; | |
9afd85c9 | 1435 | } else { |
9ed973cc LL |
1436 | goto out; |
1437 | } | |
1438 | ||
dc4eb53a LL |
1439 | if (!group) { |
1440 | saddr.proto = htons(ETH_P_IP); | |
1441 | saddr.u.ip4 = iph->saddr; | |
b00589af | 1442 | |
dc4eb53a LL |
1443 | br_multicast_query_received(br, port, &br->ip4_other_query, |
1444 | &saddr, max_delay); | |
eb1d1641 | 1445 | goto out; |
dc4eb53a | 1446 | } |
eb1d1641 | 1447 | |
b0e9a30d | 1448 | mp = br_mdb_ip4_get(mlock_dereference(br->mdb, br), group, vid); |
eb1d1641 HX |
1449 | if (!mp) |
1450 | goto out; | |
1451 | ||
1452 | max_delay *= br->multicast_last_member_count; | |
1453 | ||
8a870178 | 1454 | if (mp->mglist && |
eb1d1641 HX |
1455 | (timer_pending(&mp->timer) ? |
1456 | time_after(mp->timer.expires, now + max_delay) : | |
1457 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1458 | mod_timer(&mp->timer, now + max_delay); | |
1459 | ||
e8051688 ED |
1460 | for (pp = &mp->ports; |
1461 | (p = mlock_dereference(*pp, br)) != NULL; | |
1462 | pp = &p->next) { | |
eb1d1641 HX |
1463 | if (timer_pending(&p->timer) ? |
1464 | time_after(p->timer.expires, now + max_delay) : | |
1465 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1466 | mod_timer(&p->timer, now + max_delay); |
eb1d1641 HX |
1467 | } |
1468 | ||
1469 | out: | |
1470 | spin_unlock(&br->multicast_lock); | |
bec68ff1 | 1471 | return err; |
eb1d1641 HX |
1472 | } |
1473 | ||
dfd56b8b | 1474 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1475 | static int br_ip6_multicast_query(struct net_bridge *br, |
1476 | struct net_bridge_port *port, | |
06499098 VY |
1477 | struct sk_buff *skb, |
1478 | u16 vid) | |
08b202b6 | 1479 | { |
b71d1d42 | 1480 | const struct ipv6hdr *ip6h = ipv6_hdr(skb); |
eca2a43b | 1481 | struct mld_msg *mld; |
08b202b6 YH |
1482 | struct net_bridge_mdb_entry *mp; |
1483 | struct mld2_query *mld2q; | |
e8051688 ED |
1484 | struct net_bridge_port_group *p; |
1485 | struct net_bridge_port_group __rcu **pp; | |
dc4eb53a | 1486 | struct br_ip saddr; |
08b202b6 YH |
1487 | unsigned long max_delay; |
1488 | unsigned long now = jiffies; | |
856ce5d0 | 1489 | unsigned int offset = skb_transport_offset(skb); |
b71d1d42 | 1490 | const struct in6_addr *group = NULL; |
9ed973cc | 1491 | bool is_general_query; |
08b202b6 YH |
1492 | int err = 0; |
1493 | ||
1494 | spin_lock(&br->multicast_lock); | |
1495 | if (!netif_running(br->dev) || | |
1496 | (port && port->state == BR_STATE_DISABLED)) | |
1497 | goto out; | |
1498 | ||
856ce5d0 LL |
1499 | if (skb->len == offset + sizeof(*mld)) { |
1500 | if (!pskb_may_pull(skb, offset + sizeof(*mld))) { | |
08b202b6 YH |
1501 | err = -EINVAL; |
1502 | goto out; | |
1503 | } | |
1504 | mld = (struct mld_msg *) icmp6_hdr(skb); | |
4715213d | 1505 | max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay)); |
08b202b6 YH |
1506 | if (max_delay) |
1507 | group = &mld->mld_mca; | |
248ba8ec | 1508 | } else { |
856ce5d0 | 1509 | if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) { |
08b202b6 YH |
1510 | err = -EINVAL; |
1511 | goto out; | |
1512 | } | |
1513 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
1514 | if (!mld2q->mld2q_nsrcs) | |
1515 | group = &mld2q->mld2q_mca; | |
e3f5b170 DB |
1516 | |
1517 | max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL); | |
08b202b6 YH |
1518 | } |
1519 | ||
9ed973cc LL |
1520 | is_general_query = group && ipv6_addr_any(group); |
1521 | ||
dc4eb53a LL |
1522 | if (is_general_query) { |
1523 | saddr.proto = htons(ETH_P_IPV6); | |
1524 | saddr.u.ip6 = ip6h->saddr; | |
b00589af | 1525 | |
dc4eb53a LL |
1526 | br_multicast_query_received(br, port, &br->ip6_other_query, |
1527 | &saddr, max_delay); | |
08b202b6 | 1528 | goto out; |
6c03ee8b LL |
1529 | } else if (!group) { |
1530 | goto out; | |
dc4eb53a | 1531 | } |
08b202b6 | 1532 | |
b0e9a30d | 1533 | mp = br_mdb_ip6_get(mlock_dereference(br->mdb, br), group, vid); |
08b202b6 YH |
1534 | if (!mp) |
1535 | goto out; | |
1536 | ||
1537 | max_delay *= br->multicast_last_member_count; | |
8a870178 | 1538 | if (mp->mglist && |
08b202b6 YH |
1539 | (timer_pending(&mp->timer) ? |
1540 | time_after(mp->timer.expires, now + max_delay) : | |
1541 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1542 | mod_timer(&mp->timer, now + max_delay); | |
1543 | ||
e8051688 ED |
1544 | for (pp = &mp->ports; |
1545 | (p = mlock_dereference(*pp, br)) != NULL; | |
1546 | pp = &p->next) { | |
08b202b6 YH |
1547 | if (timer_pending(&p->timer) ? |
1548 | time_after(p->timer.expires, now + max_delay) : | |
1549 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1550 | mod_timer(&p->timer, now + max_delay); |
08b202b6 YH |
1551 | } |
1552 | ||
1553 | out: | |
1554 | spin_unlock(&br->multicast_lock); | |
1555 | return err; | |
1556 | } | |
1557 | #endif | |
1558 | ||
90010b36 LL |
1559 | static void |
1560 | br_multicast_leave_group(struct net_bridge *br, | |
1561 | struct net_bridge_port *port, | |
1562 | struct br_ip *group, | |
1563 | struct bridge_mcast_other_query *other_query, | |
6db6f0ea FF |
1564 | struct bridge_mcast_own_query *own_query, |
1565 | const unsigned char *src) | |
eb1d1641 HX |
1566 | { |
1567 | struct net_bridge_mdb_htable *mdb; | |
1568 | struct net_bridge_mdb_entry *mp; | |
1569 | struct net_bridge_port_group *p; | |
1570 | unsigned long now; | |
1571 | unsigned long time; | |
1572 | ||
eb1d1641 HX |
1573 | spin_lock(&br->multicast_lock); |
1574 | if (!netif_running(br->dev) || | |
544586f7 | 1575 | (port && port->state == BR_STATE_DISABLED)) |
eb1d1641 HX |
1576 | goto out; |
1577 | ||
e8051688 | 1578 | mdb = mlock_dereference(br->mdb, br); |
eb1d1641 HX |
1579 | mp = br_mdb_ip_get(mdb, group); |
1580 | if (!mp) | |
1581 | goto out; | |
1582 | ||
544586f7 SA |
1583 | if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) { |
1584 | struct net_bridge_port_group __rcu **pp; | |
1585 | ||
1586 | for (pp = &mp->ports; | |
1587 | (p = mlock_dereference(*pp, br)) != NULL; | |
1588 | pp = &p->next) { | |
6db6f0ea | 1589 | if (!br_port_group_equal(p, port, src)) |
544586f7 SA |
1590 | continue; |
1591 | ||
1592 | rcu_assign_pointer(*pp, p->next); | |
1593 | hlist_del_init(&p->mglist); | |
1594 | del_timer(&p->timer); | |
1595 | call_rcu_bh(&p->rcu, br_multicast_free_pg); | |
45ebcce5 ER |
1596 | br_mdb_notify(br->dev, port, group, RTM_DELMDB, |
1597 | p->flags); | |
544586f7 SA |
1598 | |
1599 | if (!mp->ports && !mp->mglist && | |
1600 | netif_running(br->dev)) | |
1601 | mod_timer(&mp->timer, jiffies); | |
1602 | } | |
1603 | goto out; | |
1604 | } | |
1605 | ||
1606 | if (timer_pending(&other_query->timer)) | |
1607 | goto out; | |
1608 | ||
cc0fdd80 | 1609 | if (br->multicast_querier) { |
6b7df111 CW |
1610 | __br_multicast_send_query(br, port, &mp->addr); |
1611 | ||
1612 | time = jiffies + br->multicast_last_member_count * | |
1613 | br->multicast_last_member_interval; | |
cc0fdd80 | 1614 | |
90010b36 | 1615 | mod_timer(&own_query->timer, time); |
6b7df111 CW |
1616 | |
1617 | for (p = mlock_dereference(mp->ports, br); | |
1618 | p != NULL; | |
1619 | p = mlock_dereference(p->next, br)) { | |
6db6f0ea | 1620 | if (!br_port_group_equal(p, port, src)) |
6b7df111 CW |
1621 | continue; |
1622 | ||
1623 | if (!hlist_unhashed(&p->mglist) && | |
1624 | (timer_pending(&p->timer) ? | |
1625 | time_after(p->timer.expires, time) : | |
1626 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1627 | mod_timer(&p->timer, time); | |
1628 | } | |
1629 | ||
1630 | break; | |
1631 | } | |
1632 | } | |
1633 | ||
eb1d1641 HX |
1634 | now = jiffies; |
1635 | time = now + br->multicast_last_member_count * | |
1636 | br->multicast_last_member_interval; | |
1637 | ||
1638 | if (!port) { | |
454594f3 | 1639 | if (mp->mglist && |
eb1d1641 HX |
1640 | (timer_pending(&mp->timer) ? |
1641 | time_after(mp->timer.expires, time) : | |
1642 | try_to_del_timer_sync(&mp->timer) >= 0)) { | |
1643 | mod_timer(&mp->timer, time); | |
eb1d1641 | 1644 | } |
454594f3 LL |
1645 | |
1646 | goto out; | |
1647 | } | |
1648 | ||
1649 | for (p = mlock_dereference(mp->ports, br); | |
1650 | p != NULL; | |
1651 | p = mlock_dereference(p->next, br)) { | |
1652 | if (p->port != port) | |
1653 | continue; | |
1654 | ||
1655 | if (!hlist_unhashed(&p->mglist) && | |
1656 | (timer_pending(&p->timer) ? | |
1657 | time_after(p->timer.expires, time) : | |
1658 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1659 | mod_timer(&p->timer, time); | |
1660 | } | |
1661 | ||
1662 | break; | |
eb1d1641 | 1663 | } |
eb1d1641 HX |
1664 | out: |
1665 | spin_unlock(&br->multicast_lock); | |
1666 | } | |
1667 | ||
8ef2a9a5 YH |
1668 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
1669 | struct net_bridge_port *port, | |
b0e9a30d | 1670 | __be32 group, |
6db6f0ea FF |
1671 | __u16 vid, |
1672 | const unsigned char *src) | |
8ef2a9a5 YH |
1673 | { |
1674 | struct br_ip br_group; | |
90010b36 | 1675 | struct bridge_mcast_own_query *own_query; |
8ef2a9a5 YH |
1676 | |
1677 | if (ipv4_is_local_multicast(group)) | |
1678 | return; | |
1679 | ||
90010b36 LL |
1680 | own_query = port ? &port->ip4_own_query : &br->ip4_own_query; |
1681 | ||
8ef2a9a5 YH |
1682 | br_group.u.ip4 = group; |
1683 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 1684 | br_group.vid = vid; |
8ef2a9a5 | 1685 | |
90010b36 | 1686 | br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query, |
6db6f0ea | 1687 | own_query, src); |
8ef2a9a5 YH |
1688 | } |
1689 | ||
dfd56b8b | 1690 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1691 | static void br_ip6_multicast_leave_group(struct net_bridge *br, |
1692 | struct net_bridge_port *port, | |
b0e9a30d | 1693 | const struct in6_addr *group, |
6db6f0ea FF |
1694 | __u16 vid, |
1695 | const unsigned char *src) | |
08b202b6 YH |
1696 | { |
1697 | struct br_ip br_group; | |
90010b36 | 1698 | struct bridge_mcast_own_query *own_query; |
08b202b6 | 1699 | |
3c3769e6 | 1700 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
1701 | return; |
1702 | ||
90010b36 LL |
1703 | own_query = port ? &port->ip6_own_query : &br->ip6_own_query; |
1704 | ||
4e3fd7a0 | 1705 | br_group.u.ip6 = *group; |
08b202b6 | 1706 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 1707 | br_group.vid = vid; |
08b202b6 | 1708 | |
90010b36 | 1709 | br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query, |
6db6f0ea | 1710 | own_query, src); |
08b202b6 YH |
1711 | } |
1712 | #endif | |
8ef2a9a5 | 1713 | |
1080ab95 NA |
1714 | static void br_multicast_err_count(const struct net_bridge *br, |
1715 | const struct net_bridge_port *p, | |
1716 | __be16 proto) | |
1717 | { | |
1718 | struct bridge_mcast_stats __percpu *stats; | |
1719 | struct bridge_mcast_stats *pstats; | |
1720 | ||
1721 | if (!br->multicast_stats_enabled) | |
1722 | return; | |
1723 | ||
1724 | if (p) | |
1725 | stats = p->mcast_stats; | |
1726 | else | |
1727 | stats = br->mcast_stats; | |
1728 | if (WARN_ON(!stats)) | |
1729 | return; | |
1730 | ||
1731 | pstats = this_cpu_ptr(stats); | |
1732 | ||
1733 | u64_stats_update_begin(&pstats->syncp); | |
1734 | switch (proto) { | |
1735 | case htons(ETH_P_IP): | |
1736 | pstats->mstats.igmp_parse_errors++; | |
1737 | break; | |
1738 | #if IS_ENABLED(CONFIG_IPV6) | |
1739 | case htons(ETH_P_IPV6): | |
1740 | pstats->mstats.mld_parse_errors++; | |
1741 | break; | |
1742 | #endif | |
1743 | } | |
1744 | u64_stats_update_end(&pstats->syncp); | |
1745 | } | |
1746 | ||
91b02d3d NA |
1747 | static void br_multicast_pim(struct net_bridge *br, |
1748 | struct net_bridge_port *port, | |
1749 | const struct sk_buff *skb) | |
1750 | { | |
1751 | unsigned int offset = skb_transport_offset(skb); | |
1752 | struct pimhdr *pimhdr, _pimhdr; | |
1753 | ||
1754 | pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr); | |
1755 | if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION || | |
1756 | pim_hdr_type(pimhdr) != PIM_TYPE_HELLO) | |
1757 | return; | |
1758 | ||
1759 | br_multicast_mark_router(br, port); | |
1760 | } | |
1761 | ||
eb1d1641 HX |
1762 | static int br_multicast_ipv4_rcv(struct net_bridge *br, |
1763 | struct net_bridge_port *port, | |
06499098 VY |
1764 | struct sk_buff *skb, |
1765 | u16 vid) | |
eb1d1641 | 1766 | { |
9afd85c9 | 1767 | struct sk_buff *skb_trimmed = NULL; |
6db6f0ea | 1768 | const unsigned char *src; |
eb1d1641 | 1769 | struct igmphdr *ih; |
eb1d1641 HX |
1770 | int err; |
1771 | ||
9afd85c9 | 1772 | err = ip_mc_check_igmp(skb, &skb_trimmed); |
eb1d1641 | 1773 | |
9afd85c9 | 1774 | if (err == -ENOMSG) { |
91b02d3d | 1775 | if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) { |
bd4265fe | 1776 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
91b02d3d NA |
1777 | } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) { |
1778 | if (ip_hdr(skb)->protocol == IPPROTO_PIM) | |
1779 | br_multicast_pim(br, port, skb); | |
1780 | } | |
eb1d1641 | 1781 | return 0; |
9afd85c9 | 1782 | } else if (err < 0) { |
1080ab95 | 1783 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1784 | return err; |
bd4265fe | 1785 | } |
eb1d1641 | 1786 | |
9afd85c9 | 1787 | ih = igmp_hdr(skb); |
6db6f0ea | 1788 | src = eth_hdr(skb)->h_source; |
1080ab95 | 1789 | BR_INPUT_SKB_CB(skb)->igmp = ih->type; |
eb1d1641 HX |
1790 | |
1791 | switch (ih->type) { | |
1792 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
1793 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
62b2bcb4 | 1794 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
6db6f0ea | 1795 | err = br_ip4_multicast_add_group(br, port, ih->group, vid, src); |
eb1d1641 HX |
1796 | break; |
1797 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
9afd85c9 | 1798 | err = br_ip4_multicast_igmp3_report(br, port, skb_trimmed, vid); |
eb1d1641 HX |
1799 | break; |
1800 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
9afd85c9 | 1801 | err = br_ip4_multicast_query(br, port, skb_trimmed, vid); |
eb1d1641 HX |
1802 | break; |
1803 | case IGMP_HOST_LEAVE_MESSAGE: | |
6db6f0ea | 1804 | br_ip4_multicast_leave_group(br, port, ih->group, vid, src); |
eb1d1641 HX |
1805 | break; |
1806 | } | |
1807 | ||
a516993f | 1808 | if (skb_trimmed && skb_trimmed != skb) |
9afd85c9 LL |
1809 | kfree_skb(skb_trimmed); |
1810 | ||
a65056ec | 1811 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1812 | BR_MCAST_DIR_RX); |
1813 | ||
eb1d1641 HX |
1814 | return err; |
1815 | } | |
1816 | ||
dfd56b8b | 1817 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1818 | static int br_multicast_ipv6_rcv(struct net_bridge *br, |
1819 | struct net_bridge_port *port, | |
06499098 VY |
1820 | struct sk_buff *skb, |
1821 | u16 vid) | |
08b202b6 | 1822 | { |
9afd85c9 | 1823 | struct sk_buff *skb_trimmed = NULL; |
6db6f0ea | 1824 | const unsigned char *src; |
9afd85c9 | 1825 | struct mld_msg *mld; |
08b202b6 YH |
1826 | int err; |
1827 | ||
9afd85c9 | 1828 | err = ipv6_mc_check_mld(skb, &skb_trimmed); |
08b202b6 | 1829 | |
9afd85c9 LL |
1830 | if (err == -ENOMSG) { |
1831 | if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr)) | |
1832 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
08b202b6 | 1833 | return 0; |
9afd85c9 | 1834 | } else if (err < 0) { |
1080ab95 | 1835 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1836 | return err; |
08b202b6 YH |
1837 | } |
1838 | ||
9afd85c9 | 1839 | mld = (struct mld_msg *)skb_transport_header(skb); |
1080ab95 | 1840 | BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type; |
08b202b6 | 1841 | |
9afd85c9 | 1842 | switch (mld->mld_type) { |
08b202b6 | 1843 | case ICMPV6_MGM_REPORT: |
6db6f0ea | 1844 | src = eth_hdr(skb)->h_source; |
fc2af6c7 | 1845 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
6db6f0ea FF |
1846 | err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid, |
1847 | src); | |
08b202b6 | 1848 | break; |
08b202b6 | 1849 | case ICMPV6_MLD2_REPORT: |
9afd85c9 | 1850 | err = br_ip6_multicast_mld2_report(br, port, skb_trimmed, vid); |
08b202b6 YH |
1851 | break; |
1852 | case ICMPV6_MGM_QUERY: | |
9afd85c9 | 1853 | err = br_ip6_multicast_query(br, port, skb_trimmed, vid); |
08b202b6 YH |
1854 | break; |
1855 | case ICMPV6_MGM_REDUCTION: | |
6db6f0ea FF |
1856 | src = eth_hdr(skb)->h_source; |
1857 | br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src); | |
9afd85c9 | 1858 | break; |
08b202b6 YH |
1859 | } |
1860 | ||
a516993f | 1861 | if (skb_trimmed && skb_trimmed != skb) |
9afd85c9 LL |
1862 | kfree_skb(skb_trimmed); |
1863 | ||
a65056ec | 1864 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1865 | BR_MCAST_DIR_RX); |
1866 | ||
08b202b6 YH |
1867 | return err; |
1868 | } | |
1869 | #endif | |
1870 | ||
eb1d1641 | 1871 | int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, |
06499098 | 1872 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 1873 | { |
1080ab95 NA |
1874 | int ret = 0; |
1875 | ||
1fafc7a9 YH |
1876 | BR_INPUT_SKB_CB(skb)->igmp = 0; |
1877 | BR_INPUT_SKB_CB(skb)->mrouters_only = 0; | |
1878 | ||
eb1d1641 HX |
1879 | if (br->multicast_disabled) |
1880 | return 0; | |
1881 | ||
1882 | switch (skb->protocol) { | |
1883 | case htons(ETH_P_IP): | |
1080ab95 NA |
1884 | ret = br_multicast_ipv4_rcv(br, port, skb, vid); |
1885 | break; | |
dfd56b8b | 1886 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 1887 | case htons(ETH_P_IPV6): |
1080ab95 NA |
1888 | ret = br_multicast_ipv6_rcv(br, port, skb, vid); |
1889 | break; | |
08b202b6 | 1890 | #endif |
eb1d1641 HX |
1891 | } |
1892 | ||
1080ab95 | 1893 | return ret; |
eb1d1641 HX |
1894 | } |
1895 | ||
cc0fdd80 | 1896 | static void br_multicast_query_expired(struct net_bridge *br, |
2cd41431 LL |
1897 | struct bridge_mcast_own_query *query, |
1898 | struct bridge_mcast_querier *querier) | |
cc0fdd80 LL |
1899 | { |
1900 | spin_lock(&br->multicast_lock); | |
1901 | if (query->startup_sent < br->multicast_startup_query_count) | |
1902 | query->startup_sent++; | |
1903 | ||
71d9f614 | 1904 | RCU_INIT_POINTER(querier->port, NULL); |
cc0fdd80 LL |
1905 | br_multicast_send_query(br, NULL, query); |
1906 | spin_unlock(&br->multicast_lock); | |
1907 | } | |
1908 | ||
1909 | static void br_ip4_multicast_query_expired(unsigned long data) | |
eb1d1641 HX |
1910 | { |
1911 | struct net_bridge *br = (void *)data; | |
1912 | ||
2cd41431 | 1913 | br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier); |
cc0fdd80 | 1914 | } |
eb1d1641 | 1915 | |
cc0fdd80 LL |
1916 | #if IS_ENABLED(CONFIG_IPV6) |
1917 | static void br_ip6_multicast_query_expired(unsigned long data) | |
1918 | { | |
1919 | struct net_bridge *br = (void *)data; | |
eb1d1641 | 1920 | |
2cd41431 | 1921 | br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier); |
eb1d1641 | 1922 | } |
cc0fdd80 | 1923 | #endif |
eb1d1641 HX |
1924 | |
1925 | void br_multicast_init(struct net_bridge *br) | |
1926 | { | |
1927 | br->hash_elasticity = 4; | |
1928 | br->hash_max = 512; | |
1929 | ||
7f0aec7a | 1930 | br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
c5c23260 | 1931 | br->multicast_querier = 0; |
1c8ad5bf | 1932 | br->multicast_query_use_ifaddr = 0; |
eb1d1641 HX |
1933 | br->multicast_last_member_count = 2; |
1934 | br->multicast_startup_query_count = 2; | |
1935 | ||
1936 | br->multicast_last_member_interval = HZ; | |
1937 | br->multicast_query_response_interval = 10 * HZ; | |
1938 | br->multicast_startup_query_interval = 125 * HZ / 4; | |
1939 | br->multicast_query_interval = 125 * HZ; | |
1940 | br->multicast_querier_interval = 255 * HZ; | |
1941 | br->multicast_membership_interval = 260 * HZ; | |
1942 | ||
90010b36 | 1943 | br->ip4_other_query.delay_time = 0; |
2cd41431 | 1944 | br->ip4_querier.port = NULL; |
aa2ae3e7 | 1945 | br->multicast_igmp_version = 2; |
cc0fdd80 | 1946 | #if IS_ENABLED(CONFIG_IPV6) |
aa2ae3e7 | 1947 | br->multicast_mld_version = 1; |
90010b36 | 1948 | br->ip6_other_query.delay_time = 0; |
2cd41431 | 1949 | br->ip6_querier.port = NULL; |
cc0fdd80 | 1950 | #endif |
0888d5f3 | 1951 | br->has_ipv6_addr = 1; |
b00589af | 1952 | |
eb1d1641 HX |
1953 | spin_lock_init(&br->multicast_lock); |
1954 | setup_timer(&br->multicast_router_timer, | |
1955 | br_multicast_local_router_expired, 0); | |
90010b36 LL |
1956 | setup_timer(&br->ip4_other_query.timer, |
1957 | br_ip4_multicast_querier_expired, (unsigned long)br); | |
1958 | setup_timer(&br->ip4_own_query.timer, br_ip4_multicast_query_expired, | |
eb1d1641 | 1959 | (unsigned long)br); |
cc0fdd80 | 1960 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 LL |
1961 | setup_timer(&br->ip6_other_query.timer, |
1962 | br_ip6_multicast_querier_expired, (unsigned long)br); | |
1963 | setup_timer(&br->ip6_own_query.timer, br_ip6_multicast_query_expired, | |
cc0fdd80 LL |
1964 | (unsigned long)br); |
1965 | #endif | |
eb1d1641 HX |
1966 | } |
1967 | ||
cc0fdd80 | 1968 | static void __br_multicast_open(struct net_bridge *br, |
90010b36 | 1969 | struct bridge_mcast_own_query *query) |
eb1d1641 | 1970 | { |
cc0fdd80 | 1971 | query->startup_sent = 0; |
eb1d1641 HX |
1972 | |
1973 | if (br->multicast_disabled) | |
1974 | return; | |
1975 | ||
cc0fdd80 LL |
1976 | mod_timer(&query->timer, jiffies); |
1977 | } | |
1978 | ||
1979 | void br_multicast_open(struct net_bridge *br) | |
1980 | { | |
90010b36 | 1981 | __br_multicast_open(br, &br->ip4_own_query); |
cc0fdd80 | 1982 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1983 | __br_multicast_open(br, &br->ip6_own_query); |
cc0fdd80 | 1984 | #endif |
eb1d1641 HX |
1985 | } |
1986 | ||
1987 | void br_multicast_stop(struct net_bridge *br) | |
1988 | { | |
eb1d1641 | 1989 | del_timer_sync(&br->multicast_router_timer); |
90010b36 LL |
1990 | del_timer_sync(&br->ip4_other_query.timer); |
1991 | del_timer_sync(&br->ip4_own_query.timer); | |
cc0fdd80 | 1992 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 LL |
1993 | del_timer_sync(&br->ip6_other_query.timer); |
1994 | del_timer_sync(&br->ip6_own_query.timer); | |
cc0fdd80 | 1995 | #endif |
e10177ab SA |
1996 | } |
1997 | ||
1998 | void br_multicast_dev_del(struct net_bridge *br) | |
1999 | { | |
2000 | struct net_bridge_mdb_htable *mdb; | |
2001 | struct net_bridge_mdb_entry *mp; | |
2002 | struct hlist_node *n; | |
2003 | u32 ver; | |
2004 | int i; | |
eb1d1641 HX |
2005 | |
2006 | spin_lock_bh(&br->multicast_lock); | |
e8051688 | 2007 | mdb = mlock_dereference(br->mdb, br); |
eb1d1641 HX |
2008 | if (!mdb) |
2009 | goto out; | |
2010 | ||
2011 | br->mdb = NULL; | |
2012 | ||
2013 | ver = mdb->ver; | |
2014 | for (i = 0; i < mdb->max; i++) { | |
b67bfe0d | 2015 | hlist_for_each_entry_safe(mp, n, &mdb->mhash[i], |
eb1d1641 HX |
2016 | hlist[ver]) { |
2017 | del_timer(&mp->timer); | |
eb1d1641 HX |
2018 | call_rcu_bh(&mp->rcu, br_multicast_free_group); |
2019 | } | |
2020 | } | |
2021 | ||
2022 | if (mdb->old) { | |
2023 | spin_unlock_bh(&br->multicast_lock); | |
10cc2b50 | 2024 | rcu_barrier_bh(); |
eb1d1641 HX |
2025 | spin_lock_bh(&br->multicast_lock); |
2026 | WARN_ON(mdb->old); | |
2027 | } | |
2028 | ||
2029 | mdb->old = mdb; | |
2030 | call_rcu_bh(&mdb->rcu, br_mdb_free); | |
2031 | ||
2032 | out: | |
2033 | spin_unlock_bh(&br->multicast_lock); | |
2034 | } | |
0909e117 HX |
2035 | |
2036 | int br_multicast_set_router(struct net_bridge *br, unsigned long val) | |
2037 | { | |
6ae4ae8e | 2038 | int err = -EINVAL; |
0909e117 HX |
2039 | |
2040 | spin_lock_bh(&br->multicast_lock); | |
0909e117 HX |
2041 | |
2042 | switch (val) { | |
7f0aec7a NA |
2043 | case MDB_RTR_TYPE_DISABLED: |
2044 | case MDB_RTR_TYPE_PERM: | |
0909e117 HX |
2045 | del_timer(&br->multicast_router_timer); |
2046 | /* fall through */ | |
7f0aec7a | 2047 | case MDB_RTR_TYPE_TEMP_QUERY: |
0909e117 HX |
2048 | br->multicast_router = val; |
2049 | err = 0; | |
2050 | break; | |
0909e117 HX |
2051 | } |
2052 | ||
0909e117 HX |
2053 | spin_unlock_bh(&br->multicast_lock); |
2054 | ||
2055 | return err; | |
2056 | } | |
2057 | ||
7f0aec7a NA |
2058 | static void __del_port_router(struct net_bridge_port *p) |
2059 | { | |
2060 | if (hlist_unhashed(&p->rlist)) | |
2061 | return; | |
2062 | hlist_del_init_rcu(&p->rlist); | |
2063 | br_rtr_notify(p->br->dev, p, RTM_DELMDB); | |
6d549648 | 2064 | br_port_mc_router_state_change(p, false); |
f12e7d95 NF |
2065 | |
2066 | /* don't allow timer refresh */ | |
2067 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
2068 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
7f0aec7a NA |
2069 | } |
2070 | ||
0909e117 HX |
2071 | int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val) |
2072 | { | |
2073 | struct net_bridge *br = p->br; | |
a55d8246 | 2074 | unsigned long now = jiffies; |
6ae4ae8e | 2075 | int err = -EINVAL; |
0909e117 HX |
2076 | |
2077 | spin_lock(&br->multicast_lock); | |
4950cfd1 | 2078 | if (p->multicast_router == val) { |
a55d8246 NA |
2079 | /* Refresh the temp router port timer */ |
2080 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
2081 | mod_timer(&p->multicast_router_timer, | |
2082 | now + br->multicast_querier_interval); | |
4950cfd1 NA |
2083 | err = 0; |
2084 | goto unlock; | |
2085 | } | |
0909e117 | 2086 | switch (val) { |
7f0aec7a NA |
2087 | case MDB_RTR_TYPE_DISABLED: |
2088 | p->multicast_router = MDB_RTR_TYPE_DISABLED; | |
2089 | __del_port_router(p); | |
2090 | del_timer(&p->multicast_router_timer); | |
2091 | break; | |
2092 | case MDB_RTR_TYPE_TEMP_QUERY: | |
2093 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
2094 | __del_port_router(p); | |
2095 | break; | |
2096 | case MDB_RTR_TYPE_PERM: | |
2097 | p->multicast_router = MDB_RTR_TYPE_PERM; | |
0909e117 | 2098 | del_timer(&p->multicast_router_timer); |
0909e117 HX |
2099 | br_multicast_add_router(br, p); |
2100 | break; | |
a55d8246 NA |
2101 | case MDB_RTR_TYPE_TEMP: |
2102 | p->multicast_router = MDB_RTR_TYPE_TEMP; | |
2103 | br_multicast_mark_router(br, p); | |
2104 | break; | |
7f0aec7a NA |
2105 | default: |
2106 | goto unlock; | |
0909e117 | 2107 | } |
7f0aec7a NA |
2108 | err = 0; |
2109 | unlock: | |
0909e117 HX |
2110 | spin_unlock(&br->multicast_lock); |
2111 | ||
2112 | return err; | |
2113 | } | |
561f1103 | 2114 | |
cc0fdd80 | 2115 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 2116 | struct bridge_mcast_own_query *query) |
561f1103 HX |
2117 | { |
2118 | struct net_bridge_port *port; | |
74857216 | 2119 | |
cc0fdd80 | 2120 | __br_multicast_open(br, query); |
74857216 HX |
2121 | |
2122 | list_for_each_entry(port, &br->port_list, list) { | |
2123 | if (port->state == BR_STATE_DISABLED || | |
2124 | port->state == BR_STATE_BLOCKING) | |
2125 | continue; | |
2126 | ||
90010b36 LL |
2127 | if (query == &br->ip4_own_query) |
2128 | br_multicast_enable(&port->ip4_own_query); | |
cc0fdd80 LL |
2129 | #if IS_ENABLED(CONFIG_IPV6) |
2130 | else | |
90010b36 | 2131 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 2132 | #endif |
74857216 HX |
2133 | } |
2134 | } | |
2135 | ||
2136 | int br_multicast_toggle(struct net_bridge *br, unsigned long val) | |
2137 | { | |
e8051688 | 2138 | struct net_bridge_mdb_htable *mdb; |
7cb3f921 NA |
2139 | struct net_bridge_port *port; |
2140 | int err = 0; | |
561f1103 | 2141 | |
ef5e0d82 | 2142 | spin_lock_bh(&br->multicast_lock); |
561f1103 HX |
2143 | if (br->multicast_disabled == !val) |
2144 | goto unlock; | |
2145 | ||
147c1e9b | 2146 | br_mc_disabled_update(br->dev, !val); |
561f1103 HX |
2147 | br->multicast_disabled = !val; |
2148 | if (br->multicast_disabled) | |
2149 | goto unlock; | |
2150 | ||
3a7fda06 HX |
2151 | if (!netif_running(br->dev)) |
2152 | goto unlock; | |
2153 | ||
e8051688 ED |
2154 | mdb = mlock_dereference(br->mdb, br); |
2155 | if (mdb) { | |
2156 | if (mdb->old) { | |
561f1103 HX |
2157 | err = -EEXIST; |
2158 | rollback: | |
2159 | br->multicast_disabled = !!val; | |
2160 | goto unlock; | |
2161 | } | |
2162 | ||
e8051688 | 2163 | err = br_mdb_rehash(&br->mdb, mdb->max, |
561f1103 HX |
2164 | br->hash_elasticity); |
2165 | if (err) | |
2166 | goto rollback; | |
2167 | } | |
2168 | ||
7cb3f921 NA |
2169 | br_multicast_open(br); |
2170 | list_for_each_entry(port, &br->port_list, list) | |
2171 | __br_multicast_enable_port(port); | |
561f1103 HX |
2172 | |
2173 | unlock: | |
ef5e0d82 | 2174 | spin_unlock_bh(&br->multicast_lock); |
561f1103 HX |
2175 | |
2176 | return err; | |
2177 | } | |
b195167f | 2178 | |
c5c23260 HX |
2179 | int br_multicast_set_querier(struct net_bridge *br, unsigned long val) |
2180 | { | |
b00589af LL |
2181 | unsigned long max_delay; |
2182 | ||
c5c23260 HX |
2183 | val = !!val; |
2184 | ||
2185 | spin_lock_bh(&br->multicast_lock); | |
2186 | if (br->multicast_querier == val) | |
2187 | goto unlock; | |
2188 | ||
2189 | br->multicast_querier = val; | |
b00589af LL |
2190 | if (!val) |
2191 | goto unlock; | |
2192 | ||
2193 | max_delay = br->multicast_query_response_interval; | |
b00589af | 2194 | |
90010b36 LL |
2195 | if (!timer_pending(&br->ip4_other_query.timer)) |
2196 | br->ip4_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2197 | |
90010b36 | 2198 | br_multicast_start_querier(br, &br->ip4_own_query); |
cc0fdd80 LL |
2199 | |
2200 | #if IS_ENABLED(CONFIG_IPV6) | |
90010b36 LL |
2201 | if (!timer_pending(&br->ip6_other_query.timer)) |
2202 | br->ip6_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2203 | |
90010b36 | 2204 | br_multicast_start_querier(br, &br->ip6_own_query); |
cc0fdd80 | 2205 | #endif |
c5c23260 HX |
2206 | |
2207 | unlock: | |
2208 | spin_unlock_bh(&br->multicast_lock); | |
2209 | ||
2210 | return 0; | |
2211 | } | |
2212 | ||
b195167f HX |
2213 | int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val) |
2214 | { | |
6ae4ae8e | 2215 | int err = -EINVAL; |
b195167f | 2216 | u32 old; |
e8051688 | 2217 | struct net_bridge_mdb_htable *mdb; |
b195167f | 2218 | |
fe0d692b | 2219 | spin_lock_bh(&br->multicast_lock); |
b195167f HX |
2220 | if (!is_power_of_2(val)) |
2221 | goto unlock; | |
e8051688 ED |
2222 | |
2223 | mdb = mlock_dereference(br->mdb, br); | |
2224 | if (mdb && val < mdb->size) | |
b195167f HX |
2225 | goto unlock; |
2226 | ||
2227 | err = 0; | |
2228 | ||
2229 | old = br->hash_max; | |
2230 | br->hash_max = val; | |
2231 | ||
e8051688 ED |
2232 | if (mdb) { |
2233 | if (mdb->old) { | |
b195167f HX |
2234 | err = -EEXIST; |
2235 | rollback: | |
2236 | br->hash_max = old; | |
2237 | goto unlock; | |
2238 | } | |
2239 | ||
2240 | err = br_mdb_rehash(&br->mdb, br->hash_max, | |
2241 | br->hash_elasticity); | |
2242 | if (err) | |
2243 | goto rollback; | |
2244 | } | |
2245 | ||
2246 | unlock: | |
fe0d692b | 2247 | spin_unlock_bh(&br->multicast_lock); |
b195167f HX |
2248 | |
2249 | return err; | |
2250 | } | |
07f8ac4a | 2251 | |
5e923585 NA |
2252 | int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val) |
2253 | { | |
2254 | /* Currently we support only version 2 and 3 */ | |
2255 | switch (val) { | |
2256 | case 2: | |
2257 | case 3: | |
2258 | break; | |
2259 | default: | |
2260 | return -EINVAL; | |
2261 | } | |
2262 | ||
2263 | spin_lock_bh(&br->multicast_lock); | |
2264 | br->multicast_igmp_version = val; | |
2265 | spin_unlock_bh(&br->multicast_lock); | |
2266 | ||
2267 | return 0; | |
2268 | } | |
2269 | ||
aa2ae3e7 NA |
2270 | #if IS_ENABLED(CONFIG_IPV6) |
2271 | int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val) | |
2272 | { | |
2273 | /* Currently we support version 1 and 2 */ | |
2274 | switch (val) { | |
2275 | case 1: | |
2276 | case 2: | |
2277 | break; | |
2278 | default: | |
2279 | return -EINVAL; | |
2280 | } | |
2281 | ||
2282 | spin_lock_bh(&br->multicast_lock); | |
2283 | br->multicast_mld_version = val; | |
2284 | spin_unlock_bh(&br->multicast_lock); | |
2285 | ||
2286 | return 0; | |
2287 | } | |
2288 | #endif | |
2289 | ||
07f8ac4a LL |
2290 | /** |
2291 | * br_multicast_list_adjacent - Returns snooped multicast addresses | |
2292 | * @dev: The bridge port adjacent to which to retrieve addresses | |
2293 | * @br_ip_list: The list to store found, snooped multicast IP addresses in | |
2294 | * | |
2295 | * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast | |
2296 | * snooping feature on all bridge ports of dev's bridge device, excluding | |
2297 | * the addresses from dev itself. | |
2298 | * | |
2299 | * Returns the number of items added to br_ip_list. | |
2300 | * | |
2301 | * Notes: | |
2302 | * - br_ip_list needs to be initialized by caller | |
2303 | * - br_ip_list might contain duplicates in the end | |
2304 | * (needs to be taken care of by caller) | |
2305 | * - br_ip_list needs to be freed by caller | |
2306 | */ | |
2307 | int br_multicast_list_adjacent(struct net_device *dev, | |
2308 | struct list_head *br_ip_list) | |
2309 | { | |
2310 | struct net_bridge *br; | |
2311 | struct net_bridge_port *port; | |
2312 | struct net_bridge_port_group *group; | |
2313 | struct br_ip_list *entry; | |
2314 | int count = 0; | |
2315 | ||
2316 | rcu_read_lock(); | |
2317 | if (!br_ip_list || !br_port_exists(dev)) | |
2318 | goto unlock; | |
2319 | ||
2320 | port = br_port_get_rcu(dev); | |
2321 | if (!port || !port->br) | |
2322 | goto unlock; | |
2323 | ||
2324 | br = port->br; | |
2325 | ||
2326 | list_for_each_entry_rcu(port, &br->port_list, list) { | |
2327 | if (!port->dev || port->dev == dev) | |
2328 | continue; | |
2329 | ||
2330 | hlist_for_each_entry_rcu(group, &port->mglist, mglist) { | |
2331 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); | |
2332 | if (!entry) | |
2333 | goto unlock; | |
2334 | ||
2335 | entry->addr = group->addr; | |
2336 | list_add(&entry->list, br_ip_list); | |
2337 | count++; | |
2338 | } | |
2339 | } | |
2340 | ||
2341 | unlock: | |
2342 | rcu_read_unlock(); | |
2343 | return count; | |
2344 | } | |
2345 | EXPORT_SYMBOL_GPL(br_multicast_list_adjacent); | |
2cd41431 | 2346 | |
c34963e2 LL |
2347 | /** |
2348 | * br_multicast_has_querier_anywhere - Checks for a querier on a bridge | |
2349 | * @dev: The bridge port providing the bridge on which to check for a querier | |
2350 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2351 | * | |
2352 | * Checks whether the given interface has a bridge on top and if so returns | |
2353 | * true if a valid querier exists anywhere on the bridged link layer. | |
2354 | * Otherwise returns false. | |
2355 | */ | |
2356 | bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto) | |
2357 | { | |
2358 | struct net_bridge *br; | |
2359 | struct net_bridge_port *port; | |
2360 | struct ethhdr eth; | |
2361 | bool ret = false; | |
2362 | ||
2363 | rcu_read_lock(); | |
2364 | if (!br_port_exists(dev)) | |
2365 | goto unlock; | |
2366 | ||
2367 | port = br_port_get_rcu(dev); | |
2368 | if (!port || !port->br) | |
2369 | goto unlock; | |
2370 | ||
2371 | br = port->br; | |
2372 | ||
2373 | memset(ð, 0, sizeof(eth)); | |
2374 | eth.h_proto = htons(proto); | |
2375 | ||
2376 | ret = br_multicast_querier_exists(br, ð); | |
2377 | ||
2378 | unlock: | |
2379 | rcu_read_unlock(); | |
2380 | return ret; | |
2381 | } | |
2382 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere); | |
2383 | ||
2cd41431 LL |
2384 | /** |
2385 | * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port | |
2386 | * @dev: The bridge port adjacent to which to check for a querier | |
2387 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2388 | * | |
2389 | * Checks whether the given interface has a bridge on top and if so returns | |
2390 | * true if a selected querier is behind one of the other ports of this | |
2391 | * bridge. Otherwise returns false. | |
2392 | */ | |
2393 | bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto) | |
2394 | { | |
2395 | struct net_bridge *br; | |
2396 | struct net_bridge_port *port; | |
2397 | bool ret = false; | |
2398 | ||
2399 | rcu_read_lock(); | |
2400 | if (!br_port_exists(dev)) | |
2401 | goto unlock; | |
2402 | ||
2403 | port = br_port_get_rcu(dev); | |
2404 | if (!port || !port->br) | |
2405 | goto unlock; | |
2406 | ||
2407 | br = port->br; | |
2408 | ||
2409 | switch (proto) { | |
2410 | case ETH_P_IP: | |
2411 | if (!timer_pending(&br->ip4_other_query.timer) || | |
2412 | rcu_dereference(br->ip4_querier.port) == port) | |
2413 | goto unlock; | |
2414 | break; | |
3993c4e1 | 2415 | #if IS_ENABLED(CONFIG_IPV6) |
2cd41431 LL |
2416 | case ETH_P_IPV6: |
2417 | if (!timer_pending(&br->ip6_other_query.timer) || | |
2418 | rcu_dereference(br->ip6_querier.port) == port) | |
2419 | goto unlock; | |
2420 | break; | |
3993c4e1 | 2421 | #endif |
2cd41431 LL |
2422 | default: |
2423 | goto unlock; | |
2424 | } | |
2425 | ||
2426 | ret = true; | |
2427 | unlock: | |
2428 | rcu_read_unlock(); | |
2429 | return ret; | |
2430 | } | |
2431 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent); | |
1080ab95 NA |
2432 | |
2433 | static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, | |
a65056ec | 2434 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2435 | { |
2436 | struct bridge_mcast_stats *pstats = this_cpu_ptr(stats); | |
a65056ec NA |
2437 | __be16 proto = skb->protocol; |
2438 | unsigned int t_len; | |
1080ab95 NA |
2439 | |
2440 | u64_stats_update_begin(&pstats->syncp); | |
2441 | switch (proto) { | |
2442 | case htons(ETH_P_IP): | |
a65056ec | 2443 | t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb); |
1080ab95 NA |
2444 | switch (type) { |
2445 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
2446 | pstats->mstats.igmp_v1reports[dir]++; | |
2447 | break; | |
2448 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
2449 | pstats->mstats.igmp_v2reports[dir]++; | |
2450 | break; | |
2451 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
2452 | pstats->mstats.igmp_v3reports[dir]++; | |
2453 | break; | |
2454 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
a65056ec NA |
2455 | if (t_len != sizeof(struct igmphdr)) { |
2456 | pstats->mstats.igmp_v3queries[dir]++; | |
2457 | } else { | |
2458 | unsigned int offset = skb_transport_offset(skb); | |
2459 | struct igmphdr *ih, _ihdr; | |
2460 | ||
2461 | ih = skb_header_pointer(skb, offset, | |
2462 | sizeof(_ihdr), &_ihdr); | |
2463 | if (!ih) | |
2464 | break; | |
2465 | if (!ih->code) | |
2466 | pstats->mstats.igmp_v1queries[dir]++; | |
2467 | else | |
2468 | pstats->mstats.igmp_v2queries[dir]++; | |
2469 | } | |
1080ab95 NA |
2470 | break; |
2471 | case IGMP_HOST_LEAVE_MESSAGE: | |
2472 | pstats->mstats.igmp_leaves[dir]++; | |
2473 | break; | |
2474 | } | |
2475 | break; | |
2476 | #if IS_ENABLED(CONFIG_IPV6) | |
2477 | case htons(ETH_P_IPV6): | |
a65056ec NA |
2478 | t_len = ntohs(ipv6_hdr(skb)->payload_len) + |
2479 | sizeof(struct ipv6hdr); | |
2480 | t_len -= skb_network_header_len(skb); | |
1080ab95 NA |
2481 | switch (type) { |
2482 | case ICMPV6_MGM_REPORT: | |
2483 | pstats->mstats.mld_v1reports[dir]++; | |
2484 | break; | |
2485 | case ICMPV6_MLD2_REPORT: | |
2486 | pstats->mstats.mld_v2reports[dir]++; | |
2487 | break; | |
2488 | case ICMPV6_MGM_QUERY: | |
a65056ec NA |
2489 | if (t_len != sizeof(struct mld_msg)) |
2490 | pstats->mstats.mld_v2queries[dir]++; | |
2491 | else | |
2492 | pstats->mstats.mld_v1queries[dir]++; | |
1080ab95 NA |
2493 | break; |
2494 | case ICMPV6_MGM_REDUCTION: | |
2495 | pstats->mstats.mld_leaves[dir]++; | |
2496 | break; | |
2497 | } | |
2498 | break; | |
2499 | #endif /* CONFIG_IPV6 */ | |
2500 | } | |
2501 | u64_stats_update_end(&pstats->syncp); | |
2502 | } | |
2503 | ||
2504 | void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, | |
a65056ec | 2505 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2506 | { |
2507 | struct bridge_mcast_stats __percpu *stats; | |
2508 | ||
2509 | /* if multicast_disabled is true then igmp type can't be set */ | |
2510 | if (!type || !br->multicast_stats_enabled) | |
2511 | return; | |
2512 | ||
2513 | if (p) | |
2514 | stats = p->mcast_stats; | |
2515 | else | |
2516 | stats = br->mcast_stats; | |
2517 | if (WARN_ON(!stats)) | |
2518 | return; | |
2519 | ||
a65056ec | 2520 | br_mcast_stats_add(stats, skb, type, dir); |
1080ab95 NA |
2521 | } |
2522 | ||
2523 | int br_multicast_init_stats(struct net_bridge *br) | |
2524 | { | |
2525 | br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); | |
2526 | if (!br->mcast_stats) | |
2527 | return -ENOMEM; | |
2528 | ||
2529 | return 0; | |
2530 | } | |
2531 | ||
b6fe0440 IS |
2532 | void br_multicast_uninit_stats(struct net_bridge *br) |
2533 | { | |
2534 | free_percpu(br->mcast_stats); | |
2535 | } | |
2536 | ||
1080ab95 NA |
2537 | static void mcast_stats_add_dir(u64 *dst, u64 *src) |
2538 | { | |
2539 | dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX]; | |
2540 | dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX]; | |
2541 | } | |
2542 | ||
2543 | void br_multicast_get_stats(const struct net_bridge *br, | |
2544 | const struct net_bridge_port *p, | |
2545 | struct br_mcast_stats *dest) | |
2546 | { | |
2547 | struct bridge_mcast_stats __percpu *stats; | |
2548 | struct br_mcast_stats tdst; | |
2549 | int i; | |
2550 | ||
2551 | memset(dest, 0, sizeof(*dest)); | |
2552 | if (p) | |
2553 | stats = p->mcast_stats; | |
2554 | else | |
2555 | stats = br->mcast_stats; | |
2556 | if (WARN_ON(!stats)) | |
2557 | return; | |
2558 | ||
2559 | memset(&tdst, 0, sizeof(tdst)); | |
2560 | for_each_possible_cpu(i) { | |
2561 | struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i); | |
2562 | struct br_mcast_stats temp; | |
2563 | unsigned int start; | |
2564 | ||
2565 | do { | |
2566 | start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); | |
2567 | memcpy(&temp, &cpu_stats->mstats, sizeof(temp)); | |
2568 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); | |
2569 | ||
a65056ec NA |
2570 | mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries); |
2571 | mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries); | |
2572 | mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries); | |
1080ab95 NA |
2573 | mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves); |
2574 | mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports); | |
2575 | mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports); | |
2576 | mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports); | |
2577 | tdst.igmp_parse_errors += temp.igmp_parse_errors; | |
2578 | ||
a65056ec NA |
2579 | mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries); |
2580 | mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries); | |
1080ab95 NA |
2581 | mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves); |
2582 | mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports); | |
2583 | mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports); | |
2584 | tdst.mld_parse_errors += temp.mld_parse_errors; | |
2585 | } | |
2586 | memcpy(dest, &tdst, sizeof(*dest)); | |
2587 | } |