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1 | /* | |
2 | * Bridge multicast support. | |
3 | * | |
4 | * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/err.h> | |
14 | #include <linux/export.h> | |
15 | #include <linux/if_ether.h> | |
16 | #include <linux/igmp.h> | |
17 | #include <linux/jhash.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/log2.h> | |
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> | |
27 | #include <linux/inetdevice.h> | |
28 | #include <linux/mroute.h> | |
29 | #include <net/ip.h> | |
30 | #include <net/switchdev.h> | |
31 | #if IS_ENABLED(CONFIG_IPV6) | |
32 | #include <net/ipv6.h> | |
33 | #include <net/mld.h> | |
34 | #include <net/ip6_checksum.h> | |
35 | #include <net/addrconf.h> | |
36 | #endif | |
37 | ||
38 | #include "br_private.h" | |
39 | ||
40 | static const struct rhashtable_params br_mdb_rht_params = { | |
41 | .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode), | |
42 | .key_offset = offsetof(struct net_bridge_mdb_entry, addr), | |
43 | .key_len = sizeof(struct br_ip), | |
44 | .automatic_shrinking = true, | |
45 | .locks_mul = 1, | |
46 | }; | |
47 | ||
48 | static void br_multicast_start_querier(struct net_bridge *br, | |
49 | struct bridge_mcast_own_query *query); | |
50 | static void br_multicast_add_router(struct net_bridge *br, | |
51 | struct net_bridge_port *port); | |
52 | static void br_ip4_multicast_leave_group(struct net_bridge *br, | |
53 | struct net_bridge_port *port, | |
54 | __be32 group, | |
55 | __u16 vid, | |
56 | const unsigned char *src); | |
57 | ||
58 | static void __del_port_router(struct net_bridge_port *p); | |
59 | #if IS_ENABLED(CONFIG_IPV6) | |
60 | static void br_ip6_multicast_leave_group(struct net_bridge *br, | |
61 | struct net_bridge_port *port, | |
62 | const struct in6_addr *group, | |
63 | __u16 vid, const unsigned char *src); | |
64 | #endif | |
65 | ||
66 | static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b) | |
67 | { | |
68 | if (a->proto != b->proto) | |
69 | return 0; | |
70 | if (a->vid != b->vid) | |
71 | return 0; | |
72 | switch (a->proto) { | |
73 | case htons(ETH_P_IP): | |
74 | return a->u.ip4 == b->u.ip4; | |
75 | #if IS_ENABLED(CONFIG_IPV6) | |
76 | case htons(ETH_P_IPV6): | |
77 | return ipv6_addr_equal(&a->u.ip6, &b->u.ip6); | |
78 | #endif | |
79 | } | |
80 | return 0; | |
81 | } | |
82 | ||
83 | static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br, | |
84 | struct br_ip *dst) | |
85 | { | |
86 | return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params); | |
87 | } | |
88 | ||
89 | struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br, | |
90 | struct br_ip *dst) | |
91 | { | |
92 | struct net_bridge_mdb_entry *ent; | |
93 | ||
94 | lockdep_assert_held_once(&br->multicast_lock); | |
95 | ||
96 | rcu_read_lock(); | |
97 | ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params); | |
98 | rcu_read_unlock(); | |
99 | ||
100 | return ent; | |
101 | } | |
102 | ||
103 | static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br, | |
104 | __be32 dst, __u16 vid) | |
105 | { | |
106 | struct br_ip br_dst; | |
107 | ||
108 | memset(&br_dst, 0, sizeof(br_dst)); | |
109 | br_dst.u.ip4 = dst; | |
110 | br_dst.proto = htons(ETH_P_IP); | |
111 | br_dst.vid = vid; | |
112 | ||
113 | return br_mdb_ip_get(br, &br_dst); | |
114 | } | |
115 | ||
116 | #if IS_ENABLED(CONFIG_IPV6) | |
117 | static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br, | |
118 | const struct in6_addr *dst, | |
119 | __u16 vid) | |
120 | { | |
121 | struct br_ip br_dst; | |
122 | ||
123 | memset(&br_dst, 0, sizeof(br_dst)); | |
124 | br_dst.u.ip6 = *dst; | |
125 | br_dst.proto = htons(ETH_P_IPV6); | |
126 | br_dst.vid = vid; | |
127 | ||
128 | return br_mdb_ip_get(br, &br_dst); | |
129 | } | |
130 | #endif | |
131 | ||
132 | struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, | |
133 | struct sk_buff *skb, u16 vid) | |
134 | { | |
135 | struct br_ip ip; | |
136 | ||
137 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
138 | return NULL; | |
139 | ||
140 | if (BR_INPUT_SKB_CB(skb)->igmp) | |
141 | return NULL; | |
142 | ||
143 | memset(&ip, 0, sizeof(ip)); | |
144 | ip.proto = skb->protocol; | |
145 | ip.vid = vid; | |
146 | ||
147 | switch (skb->protocol) { | |
148 | case htons(ETH_P_IP): | |
149 | ip.u.ip4 = ip_hdr(skb)->daddr; | |
150 | break; | |
151 | #if IS_ENABLED(CONFIG_IPV6) | |
152 | case htons(ETH_P_IPV6): | |
153 | ip.u.ip6 = ipv6_hdr(skb)->daddr; | |
154 | break; | |
155 | #endif | |
156 | default: | |
157 | return NULL; | |
158 | } | |
159 | ||
160 | return br_mdb_ip_get_rcu(br, &ip); | |
161 | } | |
162 | ||
163 | static void br_multicast_group_expired(struct timer_list *t) | |
164 | { | |
165 | struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer); | |
166 | struct net_bridge *br = mp->br; | |
167 | ||
168 | spin_lock(&br->multicast_lock); | |
169 | if (!netif_running(br->dev) || timer_pending(&mp->timer)) | |
170 | goto out; | |
171 | ||
172 | mp->host_joined = false; | |
173 | br_mdb_notify(br->dev, NULL, &mp->addr, RTM_DELMDB, 0); | |
174 | ||
175 | if (mp->ports) | |
176 | goto out; | |
177 | ||
178 | rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode, | |
179 | br_mdb_rht_params); | |
180 | hlist_del_rcu(&mp->mdb_node); | |
181 | ||
182 | kfree_rcu(mp, rcu); | |
183 | ||
184 | out: | |
185 | spin_unlock(&br->multicast_lock); | |
186 | } | |
187 | ||
188 | static void br_multicast_del_pg(struct net_bridge *br, | |
189 | struct net_bridge_port_group *pg) | |
190 | { | |
191 | struct net_bridge_mdb_entry *mp; | |
192 | struct net_bridge_port_group *p; | |
193 | struct net_bridge_port_group __rcu **pp; | |
194 | ||
195 | mp = br_mdb_ip_get(br, &pg->addr); | |
196 | if (WARN_ON(!mp)) | |
197 | return; | |
198 | ||
199 | for (pp = &mp->ports; | |
200 | (p = mlock_dereference(*pp, br)) != NULL; | |
201 | pp = &p->next) { | |
202 | if (p != pg) | |
203 | continue; | |
204 | ||
205 | rcu_assign_pointer(*pp, p->next); | |
206 | hlist_del_init(&p->mglist); | |
207 | del_timer(&p->timer); | |
208 | br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB, | |
209 | p->flags); | |
210 | kfree_rcu(p, rcu); | |
211 | ||
212 | if (!mp->ports && !mp->host_joined && | |
213 | netif_running(br->dev)) | |
214 | mod_timer(&mp->timer, jiffies); | |
215 | ||
216 | return; | |
217 | } | |
218 | ||
219 | WARN_ON(1); | |
220 | } | |
221 | ||
222 | static void br_multicast_port_group_expired(struct timer_list *t) | |
223 | { | |
224 | struct net_bridge_port_group *pg = from_timer(pg, t, timer); | |
225 | struct net_bridge *br = pg->port->br; | |
226 | ||
227 | spin_lock(&br->multicast_lock); | |
228 | if (!netif_running(br->dev) || timer_pending(&pg->timer) || | |
229 | hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT) | |
230 | goto out; | |
231 | ||
232 | br_multicast_del_pg(br, pg); | |
233 | ||
234 | out: | |
235 | spin_unlock(&br->multicast_lock); | |
236 | } | |
237 | ||
238 | static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br, | |
239 | __be32 group, | |
240 | u8 *igmp_type) | |
241 | { | |
242 | struct igmpv3_query *ihv3; | |
243 | size_t igmp_hdr_size; | |
244 | struct sk_buff *skb; | |
245 | struct igmphdr *ih; | |
246 | struct ethhdr *eth; | |
247 | struct iphdr *iph; | |
248 | ||
249 | igmp_hdr_size = sizeof(*ih); | |
250 | if (br->multicast_igmp_version == 3) | |
251 | igmp_hdr_size = sizeof(*ihv3); | |
252 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) + | |
253 | igmp_hdr_size + 4); | |
254 | if (!skb) | |
255 | goto out; | |
256 | ||
257 | skb->protocol = htons(ETH_P_IP); | |
258 | ||
259 | skb_reset_mac_header(skb); | |
260 | eth = eth_hdr(skb); | |
261 | ||
262 | ether_addr_copy(eth->h_source, br->dev->dev_addr); | |
263 | eth->h_dest[0] = 1; | |
264 | eth->h_dest[1] = 0; | |
265 | eth->h_dest[2] = 0x5e; | |
266 | eth->h_dest[3] = 0; | |
267 | eth->h_dest[4] = 0; | |
268 | eth->h_dest[5] = 1; | |
269 | eth->h_proto = htons(ETH_P_IP); | |
270 | skb_put(skb, sizeof(*eth)); | |
271 | ||
272 | skb_set_network_header(skb, skb->len); | |
273 | iph = ip_hdr(skb); | |
274 | ||
275 | iph->version = 4; | |
276 | iph->ihl = 6; | |
277 | iph->tos = 0xc0; | |
278 | iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4); | |
279 | iph->id = 0; | |
280 | iph->frag_off = htons(IP_DF); | |
281 | iph->ttl = 1; | |
282 | iph->protocol = IPPROTO_IGMP; | |
283 | iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ? | |
284 | inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0; | |
285 | iph->daddr = htonl(INADDR_ALLHOSTS_GROUP); | |
286 | ((u8 *)&iph[1])[0] = IPOPT_RA; | |
287 | ((u8 *)&iph[1])[1] = 4; | |
288 | ((u8 *)&iph[1])[2] = 0; | |
289 | ((u8 *)&iph[1])[3] = 0; | |
290 | ip_send_check(iph); | |
291 | skb_put(skb, 24); | |
292 | ||
293 | skb_set_transport_header(skb, skb->len); | |
294 | *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY; | |
295 | ||
296 | switch (br->multicast_igmp_version) { | |
297 | case 2: | |
298 | ih = igmp_hdr(skb); | |
299 | ih->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
300 | ih->code = (group ? br->multicast_last_member_interval : | |
301 | br->multicast_query_response_interval) / | |
302 | (HZ / IGMP_TIMER_SCALE); | |
303 | ih->group = group; | |
304 | ih->csum = 0; | |
305 | ih->csum = ip_compute_csum((void *)ih, sizeof(*ih)); | |
306 | break; | |
307 | case 3: | |
308 | ihv3 = igmpv3_query_hdr(skb); | |
309 | ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
310 | ihv3->code = (group ? br->multicast_last_member_interval : | |
311 | br->multicast_query_response_interval) / | |
312 | (HZ / IGMP_TIMER_SCALE); | |
313 | ihv3->group = group; | |
314 | ihv3->qqic = br->multicast_query_interval / HZ; | |
315 | ihv3->nsrcs = 0; | |
316 | ihv3->resv = 0; | |
317 | ihv3->suppress = 0; | |
318 | ihv3->qrv = 2; | |
319 | ihv3->csum = 0; | |
320 | ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3)); | |
321 | break; | |
322 | } | |
323 | ||
324 | skb_put(skb, igmp_hdr_size); | |
325 | __skb_pull(skb, sizeof(*eth)); | |
326 | ||
327 | out: | |
328 | return skb; | |
329 | } | |
330 | ||
331 | #if IS_ENABLED(CONFIG_IPV6) | |
332 | static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, | |
333 | const struct in6_addr *grp, | |
334 | u8 *igmp_type) | |
335 | { | |
336 | struct mld2_query *mld2q; | |
337 | unsigned long interval; | |
338 | struct ipv6hdr *ip6h; | |
339 | struct mld_msg *mldq; | |
340 | size_t mld_hdr_size; | |
341 | struct sk_buff *skb; | |
342 | struct ethhdr *eth; | |
343 | u8 *hopopt; | |
344 | ||
345 | mld_hdr_size = sizeof(*mldq); | |
346 | if (br->multicast_mld_version == 2) | |
347 | mld_hdr_size = sizeof(*mld2q); | |
348 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) + | |
349 | 8 + mld_hdr_size); | |
350 | if (!skb) | |
351 | goto out; | |
352 | ||
353 | skb->protocol = htons(ETH_P_IPV6); | |
354 | ||
355 | /* Ethernet header */ | |
356 | skb_reset_mac_header(skb); | |
357 | eth = eth_hdr(skb); | |
358 | ||
359 | ether_addr_copy(eth->h_source, br->dev->dev_addr); | |
360 | eth->h_proto = htons(ETH_P_IPV6); | |
361 | skb_put(skb, sizeof(*eth)); | |
362 | ||
363 | /* IPv6 header + HbH option */ | |
364 | skb_set_network_header(skb, skb->len); | |
365 | ip6h = ipv6_hdr(skb); | |
366 | ||
367 | *(__force __be32 *)ip6h = htonl(0x60000000); | |
368 | ip6h->payload_len = htons(8 + mld_hdr_size); | |
369 | ip6h->nexthdr = IPPROTO_HOPOPTS; | |
370 | ip6h->hop_limit = 1; | |
371 | ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1)); | |
372 | if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, | |
373 | &ip6h->saddr)) { | |
374 | kfree_skb(skb); | |
375 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false); | |
376 | return NULL; | |
377 | } | |
378 | ||
379 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); | |
380 | ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); | |
381 | ||
382 | hopopt = (u8 *)(ip6h + 1); | |
383 | hopopt[0] = IPPROTO_ICMPV6; /* next hdr */ | |
384 | hopopt[1] = 0; /* length of HbH */ | |
385 | hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */ | |
386 | hopopt[3] = 2; /* Length of RA Option */ | |
387 | hopopt[4] = 0; /* Type = 0x0000 (MLD) */ | |
388 | hopopt[5] = 0; | |
389 | hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */ | |
390 | hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */ | |
391 | ||
392 | skb_put(skb, sizeof(*ip6h) + 8); | |
393 | ||
394 | /* ICMPv6 */ | |
395 | skb_set_transport_header(skb, skb->len); | |
396 | interval = ipv6_addr_any(grp) ? | |
397 | br->multicast_query_response_interval : | |
398 | br->multicast_last_member_interval; | |
399 | *igmp_type = ICMPV6_MGM_QUERY; | |
400 | switch (br->multicast_mld_version) { | |
401 | case 1: | |
402 | mldq = (struct mld_msg *)icmp6_hdr(skb); | |
403 | mldq->mld_type = ICMPV6_MGM_QUERY; | |
404 | mldq->mld_code = 0; | |
405 | mldq->mld_cksum = 0; | |
406 | mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval)); | |
407 | mldq->mld_reserved = 0; | |
408 | mldq->mld_mca = *grp; | |
409 | mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
410 | sizeof(*mldq), IPPROTO_ICMPV6, | |
411 | csum_partial(mldq, | |
412 | sizeof(*mldq), | |
413 | 0)); | |
414 | break; | |
415 | case 2: | |
416 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
417 | mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval)); | |
418 | mld2q->mld2q_type = ICMPV6_MGM_QUERY; | |
419 | mld2q->mld2q_code = 0; | |
420 | mld2q->mld2q_cksum = 0; | |
421 | mld2q->mld2q_resv1 = 0; | |
422 | mld2q->mld2q_resv2 = 0; | |
423 | mld2q->mld2q_suppress = 0; | |
424 | mld2q->mld2q_qrv = 2; | |
425 | mld2q->mld2q_nsrcs = 0; | |
426 | mld2q->mld2q_qqic = br->multicast_query_interval / HZ; | |
427 | mld2q->mld2q_mca = *grp; | |
428 | mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
429 | sizeof(*mld2q), | |
430 | IPPROTO_ICMPV6, | |
431 | csum_partial(mld2q, | |
432 | sizeof(*mld2q), | |
433 | 0)); | |
434 | break; | |
435 | } | |
436 | skb_put(skb, mld_hdr_size); | |
437 | ||
438 | __skb_pull(skb, sizeof(*eth)); | |
439 | ||
440 | out: | |
441 | return skb; | |
442 | } | |
443 | #endif | |
444 | ||
445 | static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br, | |
446 | struct br_ip *addr, | |
447 | u8 *igmp_type) | |
448 | { | |
449 | switch (addr->proto) { | |
450 | case htons(ETH_P_IP): | |
451 | return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type); | |
452 | #if IS_ENABLED(CONFIG_IPV6) | |
453 | case htons(ETH_P_IPV6): | |
454 | return br_ip6_multicast_alloc_query(br, &addr->u.ip6, | |
455 | igmp_type); | |
456 | #endif | |
457 | } | |
458 | return NULL; | |
459 | } | |
460 | ||
461 | struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, | |
462 | struct br_ip *group) | |
463 | { | |
464 | struct net_bridge_mdb_entry *mp; | |
465 | int err; | |
466 | ||
467 | mp = br_mdb_ip_get(br, group); | |
468 | if (mp) | |
469 | return mp; | |
470 | ||
471 | if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) { | |
472 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false); | |
473 | return ERR_PTR(-E2BIG); | |
474 | } | |
475 | ||
476 | mp = kzalloc(sizeof(*mp), GFP_ATOMIC); | |
477 | if (unlikely(!mp)) | |
478 | return ERR_PTR(-ENOMEM); | |
479 | ||
480 | mp->br = br; | |
481 | mp->addr = *group; | |
482 | timer_setup(&mp->timer, br_multicast_group_expired, 0); | |
483 | err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode, | |
484 | br_mdb_rht_params); | |
485 | if (err) { | |
486 | kfree(mp); | |
487 | mp = ERR_PTR(err); | |
488 | } else { | |
489 | hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list); | |
490 | } | |
491 | ||
492 | return mp; | |
493 | } | |
494 | ||
495 | struct net_bridge_port_group *br_multicast_new_port_group( | |
496 | struct net_bridge_port *port, | |
497 | struct br_ip *group, | |
498 | struct net_bridge_port_group __rcu *next, | |
499 | unsigned char flags, | |
500 | const unsigned char *src) | |
501 | { | |
502 | struct net_bridge_port_group *p; | |
503 | ||
504 | p = kzalloc(sizeof(*p), GFP_ATOMIC); | |
505 | if (unlikely(!p)) | |
506 | return NULL; | |
507 | ||
508 | p->addr = *group; | |
509 | p->port = port; | |
510 | p->flags = flags; | |
511 | rcu_assign_pointer(p->next, next); | |
512 | hlist_add_head(&p->mglist, &port->mglist); | |
513 | timer_setup(&p->timer, br_multicast_port_group_expired, 0); | |
514 | ||
515 | if (src) | |
516 | memcpy(p->eth_addr, src, ETH_ALEN); | |
517 | else | |
518 | memset(p->eth_addr, 0xff, ETH_ALEN); | |
519 | ||
520 | return p; | |
521 | } | |
522 | ||
523 | static bool br_port_group_equal(struct net_bridge_port_group *p, | |
524 | struct net_bridge_port *port, | |
525 | const unsigned char *src) | |
526 | { | |
527 | if (p->port != port) | |
528 | return false; | |
529 | ||
530 | if (!(port->flags & BR_MULTICAST_TO_UNICAST)) | |
531 | return true; | |
532 | ||
533 | return ether_addr_equal(src, p->eth_addr); | |
534 | } | |
535 | ||
536 | static int br_multicast_add_group(struct net_bridge *br, | |
537 | struct net_bridge_port *port, | |
538 | struct br_ip *group, | |
539 | const unsigned char *src) | |
540 | { | |
541 | struct net_bridge_port_group __rcu **pp; | |
542 | struct net_bridge_port_group *p; | |
543 | struct net_bridge_mdb_entry *mp; | |
544 | unsigned long now = jiffies; | |
545 | int err; | |
546 | ||
547 | spin_lock(&br->multicast_lock); | |
548 | if (!netif_running(br->dev) || | |
549 | (port && port->state == BR_STATE_DISABLED)) | |
550 | goto out; | |
551 | ||
552 | mp = br_multicast_new_group(br, group); | |
553 | err = PTR_ERR(mp); | |
554 | if (IS_ERR(mp)) | |
555 | goto err; | |
556 | ||
557 | if (!port) { | |
558 | if (!mp->host_joined) { | |
559 | mp->host_joined = true; | |
560 | br_mdb_notify(br->dev, NULL, &mp->addr, RTM_NEWMDB, 0); | |
561 | } | |
562 | mod_timer(&mp->timer, now + br->multicast_membership_interval); | |
563 | goto out; | |
564 | } | |
565 | ||
566 | for (pp = &mp->ports; | |
567 | (p = mlock_dereference(*pp, br)) != NULL; | |
568 | pp = &p->next) { | |
569 | if (br_port_group_equal(p, port, src)) | |
570 | goto found; | |
571 | if ((unsigned long)p->port < (unsigned long)port) | |
572 | break; | |
573 | } | |
574 | ||
575 | p = br_multicast_new_port_group(port, group, *pp, 0, src); | |
576 | if (unlikely(!p)) | |
577 | goto err; | |
578 | rcu_assign_pointer(*pp, p); | |
579 | br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0); | |
580 | ||
581 | found: | |
582 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
583 | out: | |
584 | err = 0; | |
585 | ||
586 | err: | |
587 | spin_unlock(&br->multicast_lock); | |
588 | return err; | |
589 | } | |
590 | ||
591 | static int br_ip4_multicast_add_group(struct net_bridge *br, | |
592 | struct net_bridge_port *port, | |
593 | __be32 group, | |
594 | __u16 vid, | |
595 | const unsigned char *src) | |
596 | { | |
597 | struct br_ip br_group; | |
598 | ||
599 | if (ipv4_is_local_multicast(group)) | |
600 | return 0; | |
601 | ||
602 | br_group.u.ip4 = group; | |
603 | br_group.proto = htons(ETH_P_IP); | |
604 | br_group.vid = vid; | |
605 | ||
606 | return br_multicast_add_group(br, port, &br_group, src); | |
607 | } | |
608 | ||
609 | #if IS_ENABLED(CONFIG_IPV6) | |
610 | static int br_ip6_multicast_add_group(struct net_bridge *br, | |
611 | struct net_bridge_port *port, | |
612 | const struct in6_addr *group, | |
613 | __u16 vid, | |
614 | const unsigned char *src) | |
615 | { | |
616 | struct br_ip br_group; | |
617 | ||
618 | if (ipv6_addr_is_ll_all_nodes(group)) | |
619 | return 0; | |
620 | ||
621 | memset(&br_group, 0, sizeof(br_group)); | |
622 | br_group.u.ip6 = *group; | |
623 | br_group.proto = htons(ETH_P_IPV6); | |
624 | br_group.vid = vid; | |
625 | ||
626 | return br_multicast_add_group(br, port, &br_group, src); | |
627 | } | |
628 | #endif | |
629 | ||
630 | static void br_multicast_router_expired(struct timer_list *t) | |
631 | { | |
632 | struct net_bridge_port *port = | |
633 | from_timer(port, t, multicast_router_timer); | |
634 | struct net_bridge *br = port->br; | |
635 | ||
636 | spin_lock(&br->multicast_lock); | |
637 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || | |
638 | port->multicast_router == MDB_RTR_TYPE_PERM || | |
639 | timer_pending(&port->multicast_router_timer)) | |
640 | goto out; | |
641 | ||
642 | __del_port_router(port); | |
643 | out: | |
644 | spin_unlock(&br->multicast_lock); | |
645 | } | |
646 | ||
647 | static void br_mc_router_state_change(struct net_bridge *p, | |
648 | bool is_mc_router) | |
649 | { | |
650 | struct switchdev_attr attr = { | |
651 | .orig_dev = p->dev, | |
652 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER, | |
653 | .flags = SWITCHDEV_F_DEFER, | |
654 | .u.mrouter = is_mc_router, | |
655 | }; | |
656 | ||
657 | switchdev_port_attr_set(p->dev, &attr); | |
658 | } | |
659 | ||
660 | static void br_multicast_local_router_expired(struct timer_list *t) | |
661 | { | |
662 | struct net_bridge *br = from_timer(br, t, multicast_router_timer); | |
663 | ||
664 | spin_lock(&br->multicast_lock); | |
665 | if (br->multicast_router == MDB_RTR_TYPE_DISABLED || | |
666 | br->multicast_router == MDB_RTR_TYPE_PERM || | |
667 | timer_pending(&br->multicast_router_timer)) | |
668 | goto out; | |
669 | ||
670 | br_mc_router_state_change(br, false); | |
671 | out: | |
672 | spin_unlock(&br->multicast_lock); | |
673 | } | |
674 | ||
675 | static void br_multicast_querier_expired(struct net_bridge *br, | |
676 | struct bridge_mcast_own_query *query) | |
677 | { | |
678 | spin_lock(&br->multicast_lock); | |
679 | if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
680 | goto out; | |
681 | ||
682 | br_multicast_start_querier(br, query); | |
683 | ||
684 | out: | |
685 | spin_unlock(&br->multicast_lock); | |
686 | } | |
687 | ||
688 | static void br_ip4_multicast_querier_expired(struct timer_list *t) | |
689 | { | |
690 | struct net_bridge *br = from_timer(br, t, ip4_other_query.timer); | |
691 | ||
692 | br_multicast_querier_expired(br, &br->ip4_own_query); | |
693 | } | |
694 | ||
695 | #if IS_ENABLED(CONFIG_IPV6) | |
696 | static void br_ip6_multicast_querier_expired(struct timer_list *t) | |
697 | { | |
698 | struct net_bridge *br = from_timer(br, t, ip6_other_query.timer); | |
699 | ||
700 | br_multicast_querier_expired(br, &br->ip6_own_query); | |
701 | } | |
702 | #endif | |
703 | ||
704 | static void br_multicast_select_own_querier(struct net_bridge *br, | |
705 | struct br_ip *ip, | |
706 | struct sk_buff *skb) | |
707 | { | |
708 | if (ip->proto == htons(ETH_P_IP)) | |
709 | br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr; | |
710 | #if IS_ENABLED(CONFIG_IPV6) | |
711 | else | |
712 | br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr; | |
713 | #endif | |
714 | } | |
715 | ||
716 | static void __br_multicast_send_query(struct net_bridge *br, | |
717 | struct net_bridge_port *port, | |
718 | struct br_ip *ip) | |
719 | { | |
720 | struct sk_buff *skb; | |
721 | u8 igmp_type; | |
722 | ||
723 | skb = br_multicast_alloc_query(br, ip, &igmp_type); | |
724 | if (!skb) | |
725 | return; | |
726 | ||
727 | if (port) { | |
728 | skb->dev = port->dev; | |
729 | br_multicast_count(br, port, skb, igmp_type, | |
730 | BR_MCAST_DIR_TX); | |
731 | NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, | |
732 | dev_net(port->dev), NULL, skb, NULL, skb->dev, | |
733 | br_dev_queue_push_xmit); | |
734 | } else { | |
735 | br_multicast_select_own_querier(br, ip, skb); | |
736 | br_multicast_count(br, port, skb, igmp_type, | |
737 | BR_MCAST_DIR_RX); | |
738 | netif_rx(skb); | |
739 | } | |
740 | } | |
741 | ||
742 | static void br_multicast_send_query(struct net_bridge *br, | |
743 | struct net_bridge_port *port, | |
744 | struct bridge_mcast_own_query *own_query) | |
745 | { | |
746 | struct bridge_mcast_other_query *other_query = NULL; | |
747 | struct br_ip br_group; | |
748 | unsigned long time; | |
749 | ||
750 | if (!netif_running(br->dev) || | |
751 | !br_opt_get(br, BROPT_MULTICAST_ENABLED) || | |
752 | !br_opt_get(br, BROPT_MULTICAST_QUERIER)) | |
753 | return; | |
754 | ||
755 | memset(&br_group.u, 0, sizeof(br_group.u)); | |
756 | ||
757 | if (port ? (own_query == &port->ip4_own_query) : | |
758 | (own_query == &br->ip4_own_query)) { | |
759 | other_query = &br->ip4_other_query; | |
760 | br_group.proto = htons(ETH_P_IP); | |
761 | #if IS_ENABLED(CONFIG_IPV6) | |
762 | } else { | |
763 | other_query = &br->ip6_other_query; | |
764 | br_group.proto = htons(ETH_P_IPV6); | |
765 | #endif | |
766 | } | |
767 | ||
768 | if (!other_query || timer_pending(&other_query->timer)) | |
769 | return; | |
770 | ||
771 | __br_multicast_send_query(br, port, &br_group); | |
772 | ||
773 | time = jiffies; | |
774 | time += own_query->startup_sent < br->multicast_startup_query_count ? | |
775 | br->multicast_startup_query_interval : | |
776 | br->multicast_query_interval; | |
777 | mod_timer(&own_query->timer, time); | |
778 | } | |
779 | ||
780 | static void | |
781 | br_multicast_port_query_expired(struct net_bridge_port *port, | |
782 | struct bridge_mcast_own_query *query) | |
783 | { | |
784 | struct net_bridge *br = port->br; | |
785 | ||
786 | spin_lock(&br->multicast_lock); | |
787 | if (port->state == BR_STATE_DISABLED || | |
788 | port->state == BR_STATE_BLOCKING) | |
789 | goto out; | |
790 | ||
791 | if (query->startup_sent < br->multicast_startup_query_count) | |
792 | query->startup_sent++; | |
793 | ||
794 | br_multicast_send_query(port->br, port, query); | |
795 | ||
796 | out: | |
797 | spin_unlock(&br->multicast_lock); | |
798 | } | |
799 | ||
800 | static void br_ip4_multicast_port_query_expired(struct timer_list *t) | |
801 | { | |
802 | struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer); | |
803 | ||
804 | br_multicast_port_query_expired(port, &port->ip4_own_query); | |
805 | } | |
806 | ||
807 | #if IS_ENABLED(CONFIG_IPV6) | |
808 | static void br_ip6_multicast_port_query_expired(struct timer_list *t) | |
809 | { | |
810 | struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer); | |
811 | ||
812 | br_multicast_port_query_expired(port, &port->ip6_own_query); | |
813 | } | |
814 | #endif | |
815 | ||
816 | static void br_mc_disabled_update(struct net_device *dev, bool value) | |
817 | { | |
818 | struct switchdev_attr attr = { | |
819 | .orig_dev = dev, | |
820 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED, | |
821 | .flags = SWITCHDEV_F_DEFER, | |
822 | .u.mc_disabled = !value, | |
823 | }; | |
824 | ||
825 | switchdev_port_attr_set(dev, &attr); | |
826 | } | |
827 | ||
828 | int br_multicast_add_port(struct net_bridge_port *port) | |
829 | { | |
830 | port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
831 | ||
832 | timer_setup(&port->multicast_router_timer, | |
833 | br_multicast_router_expired, 0); | |
834 | timer_setup(&port->ip4_own_query.timer, | |
835 | br_ip4_multicast_port_query_expired, 0); | |
836 | #if IS_ENABLED(CONFIG_IPV6) | |
837 | timer_setup(&port->ip6_own_query.timer, | |
838 | br_ip6_multicast_port_query_expired, 0); | |
839 | #endif | |
840 | br_mc_disabled_update(port->dev, | |
841 | br_opt_get(port->br, BROPT_MULTICAST_ENABLED)); | |
842 | ||
843 | port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); | |
844 | if (!port->mcast_stats) | |
845 | return -ENOMEM; | |
846 | ||
847 | return 0; | |
848 | } | |
849 | ||
850 | void br_multicast_del_port(struct net_bridge_port *port) | |
851 | { | |
852 | struct net_bridge *br = port->br; | |
853 | struct net_bridge_port_group *pg; | |
854 | struct hlist_node *n; | |
855 | ||
856 | /* Take care of the remaining groups, only perm ones should be left */ | |
857 | spin_lock_bh(&br->multicast_lock); | |
858 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) | |
859 | br_multicast_del_pg(br, pg); | |
860 | spin_unlock_bh(&br->multicast_lock); | |
861 | del_timer_sync(&port->multicast_router_timer); | |
862 | free_percpu(port->mcast_stats); | |
863 | } | |
864 | ||
865 | static void br_multicast_enable(struct bridge_mcast_own_query *query) | |
866 | { | |
867 | query->startup_sent = 0; | |
868 | ||
869 | if (try_to_del_timer_sync(&query->timer) >= 0 || | |
870 | del_timer(&query->timer)) | |
871 | mod_timer(&query->timer, jiffies); | |
872 | } | |
873 | ||
874 | static void __br_multicast_enable_port(struct net_bridge_port *port) | |
875 | { | |
876 | struct net_bridge *br = port->br; | |
877 | ||
878 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev)) | |
879 | return; | |
880 | ||
881 | br_multicast_enable(&port->ip4_own_query); | |
882 | #if IS_ENABLED(CONFIG_IPV6) | |
883 | br_multicast_enable(&port->ip6_own_query); | |
884 | #endif | |
885 | if (port->multicast_router == MDB_RTR_TYPE_PERM && | |
886 | hlist_unhashed(&port->rlist)) | |
887 | br_multicast_add_router(br, port); | |
888 | } | |
889 | ||
890 | void br_multicast_enable_port(struct net_bridge_port *port) | |
891 | { | |
892 | struct net_bridge *br = port->br; | |
893 | ||
894 | spin_lock(&br->multicast_lock); | |
895 | __br_multicast_enable_port(port); | |
896 | spin_unlock(&br->multicast_lock); | |
897 | } | |
898 | ||
899 | void br_multicast_disable_port(struct net_bridge_port *port) | |
900 | { | |
901 | struct net_bridge *br = port->br; | |
902 | struct net_bridge_port_group *pg; | |
903 | struct hlist_node *n; | |
904 | ||
905 | spin_lock(&br->multicast_lock); | |
906 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) | |
907 | if (!(pg->flags & MDB_PG_FLAGS_PERMANENT)) | |
908 | br_multicast_del_pg(br, pg); | |
909 | ||
910 | __del_port_router(port); | |
911 | ||
912 | del_timer(&port->multicast_router_timer); | |
913 | del_timer(&port->ip4_own_query.timer); | |
914 | #if IS_ENABLED(CONFIG_IPV6) | |
915 | del_timer(&port->ip6_own_query.timer); | |
916 | #endif | |
917 | spin_unlock(&br->multicast_lock); | |
918 | } | |
919 | ||
920 | static int br_ip4_multicast_igmp3_report(struct net_bridge *br, | |
921 | struct net_bridge_port *port, | |
922 | struct sk_buff *skb, | |
923 | u16 vid) | |
924 | { | |
925 | const unsigned char *src; | |
926 | struct igmpv3_report *ih; | |
927 | struct igmpv3_grec *grec; | |
928 | int i; | |
929 | int len; | |
930 | int num; | |
931 | int type; | |
932 | int err = 0; | |
933 | __be32 group; | |
934 | ||
935 | ih = igmpv3_report_hdr(skb); | |
936 | num = ntohs(ih->ngrec); | |
937 | len = skb_transport_offset(skb) + sizeof(*ih); | |
938 | ||
939 | for (i = 0; i < num; i++) { | |
940 | len += sizeof(*grec); | |
941 | if (!ip_mc_may_pull(skb, len)) | |
942 | return -EINVAL; | |
943 | ||
944 | grec = (void *)(skb->data + len - sizeof(*grec)); | |
945 | group = grec->grec_mca; | |
946 | type = grec->grec_type; | |
947 | ||
948 | len += ntohs(grec->grec_nsrcs) * 4; | |
949 | if (!ip_mc_may_pull(skb, len)) | |
950 | return -EINVAL; | |
951 | ||
952 | /* We treat this as an IGMPv2 report for now. */ | |
953 | switch (type) { | |
954 | case IGMPV3_MODE_IS_INCLUDE: | |
955 | case IGMPV3_MODE_IS_EXCLUDE: | |
956 | case IGMPV3_CHANGE_TO_INCLUDE: | |
957 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
958 | case IGMPV3_ALLOW_NEW_SOURCES: | |
959 | case IGMPV3_BLOCK_OLD_SOURCES: | |
960 | break; | |
961 | ||
962 | default: | |
963 | continue; | |
964 | } | |
965 | ||
966 | src = eth_hdr(skb)->h_source; | |
967 | if ((type == IGMPV3_CHANGE_TO_INCLUDE || | |
968 | type == IGMPV3_MODE_IS_INCLUDE) && | |
969 | ntohs(grec->grec_nsrcs) == 0) { | |
970 | br_ip4_multicast_leave_group(br, port, group, vid, src); | |
971 | } else { | |
972 | err = br_ip4_multicast_add_group(br, port, group, vid, | |
973 | src); | |
974 | if (err) | |
975 | break; | |
976 | } | |
977 | } | |
978 | ||
979 | return err; | |
980 | } | |
981 | ||
982 | #if IS_ENABLED(CONFIG_IPV6) | |
983 | static int br_ip6_multicast_mld2_report(struct net_bridge *br, | |
984 | struct net_bridge_port *port, | |
985 | struct sk_buff *skb, | |
986 | u16 vid) | |
987 | { | |
988 | unsigned int nsrcs_offset; | |
989 | const unsigned char *src; | |
990 | struct icmp6hdr *icmp6h; | |
991 | struct mld2_grec *grec; | |
992 | unsigned int grec_len; | |
993 | int i; | |
994 | int len; | |
995 | int num; | |
996 | int err = 0; | |
997 | ||
998 | if (!ipv6_mc_may_pull(skb, sizeof(*icmp6h))) | |
999 | return -EINVAL; | |
1000 | ||
1001 | icmp6h = icmp6_hdr(skb); | |
1002 | num = ntohs(icmp6h->icmp6_dataun.un_data16[1]); | |
1003 | len = skb_transport_offset(skb) + sizeof(*icmp6h); | |
1004 | ||
1005 | for (i = 0; i < num; i++) { | |
1006 | __be16 *nsrcs, _nsrcs; | |
1007 | ||
1008 | nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs); | |
1009 | ||
1010 | if (skb_transport_offset(skb) + ipv6_transport_len(skb) < | |
1011 | nsrcs_offset + sizeof(_nsrcs)) | |
1012 | return -EINVAL; | |
1013 | ||
1014 | nsrcs = skb_header_pointer(skb, nsrcs_offset, | |
1015 | sizeof(_nsrcs), &_nsrcs); | |
1016 | if (!nsrcs) | |
1017 | return -EINVAL; | |
1018 | ||
1019 | grec_len = sizeof(*grec) + | |
1020 | sizeof(struct in6_addr) * ntohs(*nsrcs); | |
1021 | ||
1022 | if (!ipv6_mc_may_pull(skb, len + grec_len)) | |
1023 | return -EINVAL; | |
1024 | ||
1025 | grec = (struct mld2_grec *)(skb->data + len); | |
1026 | len += grec_len; | |
1027 | ||
1028 | /* We treat these as MLDv1 reports for now. */ | |
1029 | switch (grec->grec_type) { | |
1030 | case MLD2_MODE_IS_INCLUDE: | |
1031 | case MLD2_MODE_IS_EXCLUDE: | |
1032 | case MLD2_CHANGE_TO_INCLUDE: | |
1033 | case MLD2_CHANGE_TO_EXCLUDE: | |
1034 | case MLD2_ALLOW_NEW_SOURCES: | |
1035 | case MLD2_BLOCK_OLD_SOURCES: | |
1036 | break; | |
1037 | ||
1038 | default: | |
1039 | continue; | |
1040 | } | |
1041 | ||
1042 | src = eth_hdr(skb)->h_source; | |
1043 | if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE || | |
1044 | grec->grec_type == MLD2_MODE_IS_INCLUDE) && | |
1045 | ntohs(*nsrcs) == 0) { | |
1046 | br_ip6_multicast_leave_group(br, port, &grec->grec_mca, | |
1047 | vid, src); | |
1048 | } else { | |
1049 | err = br_ip6_multicast_add_group(br, port, | |
1050 | &grec->grec_mca, vid, | |
1051 | src); | |
1052 | if (err) | |
1053 | break; | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | return err; | |
1058 | } | |
1059 | #endif | |
1060 | ||
1061 | static bool br_ip4_multicast_select_querier(struct net_bridge *br, | |
1062 | struct net_bridge_port *port, | |
1063 | __be32 saddr) | |
1064 | { | |
1065 | if (!timer_pending(&br->ip4_own_query.timer) && | |
1066 | !timer_pending(&br->ip4_other_query.timer)) | |
1067 | goto update; | |
1068 | ||
1069 | if (!br->ip4_querier.addr.u.ip4) | |
1070 | goto update; | |
1071 | ||
1072 | if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4)) | |
1073 | goto update; | |
1074 | ||
1075 | return false; | |
1076 | ||
1077 | update: | |
1078 | br->ip4_querier.addr.u.ip4 = saddr; | |
1079 | ||
1080 | /* update protected by general multicast_lock by caller */ | |
1081 | rcu_assign_pointer(br->ip4_querier.port, port); | |
1082 | ||
1083 | return true; | |
1084 | } | |
1085 | ||
1086 | #if IS_ENABLED(CONFIG_IPV6) | |
1087 | static bool br_ip6_multicast_select_querier(struct net_bridge *br, | |
1088 | struct net_bridge_port *port, | |
1089 | struct in6_addr *saddr) | |
1090 | { | |
1091 | if (!timer_pending(&br->ip6_own_query.timer) && | |
1092 | !timer_pending(&br->ip6_other_query.timer)) | |
1093 | goto update; | |
1094 | ||
1095 | if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0) | |
1096 | goto update; | |
1097 | ||
1098 | return false; | |
1099 | ||
1100 | update: | |
1101 | br->ip6_querier.addr.u.ip6 = *saddr; | |
1102 | ||
1103 | /* update protected by general multicast_lock by caller */ | |
1104 | rcu_assign_pointer(br->ip6_querier.port, port); | |
1105 | ||
1106 | return true; | |
1107 | } | |
1108 | #endif | |
1109 | ||
1110 | static bool br_multicast_select_querier(struct net_bridge *br, | |
1111 | struct net_bridge_port *port, | |
1112 | struct br_ip *saddr) | |
1113 | { | |
1114 | switch (saddr->proto) { | |
1115 | case htons(ETH_P_IP): | |
1116 | return br_ip4_multicast_select_querier(br, port, saddr->u.ip4); | |
1117 | #if IS_ENABLED(CONFIG_IPV6) | |
1118 | case htons(ETH_P_IPV6): | |
1119 | return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6); | |
1120 | #endif | |
1121 | } | |
1122 | ||
1123 | return false; | |
1124 | } | |
1125 | ||
1126 | static void | |
1127 | br_multicast_update_query_timer(struct net_bridge *br, | |
1128 | struct bridge_mcast_other_query *query, | |
1129 | unsigned long max_delay) | |
1130 | { | |
1131 | if (!timer_pending(&query->timer)) | |
1132 | query->delay_time = jiffies + max_delay; | |
1133 | ||
1134 | mod_timer(&query->timer, jiffies + br->multicast_querier_interval); | |
1135 | } | |
1136 | ||
1137 | static void br_port_mc_router_state_change(struct net_bridge_port *p, | |
1138 | bool is_mc_router) | |
1139 | { | |
1140 | struct switchdev_attr attr = { | |
1141 | .orig_dev = p->dev, | |
1142 | .id = SWITCHDEV_ATTR_ID_PORT_MROUTER, | |
1143 | .flags = SWITCHDEV_F_DEFER, | |
1144 | .u.mrouter = is_mc_router, | |
1145 | }; | |
1146 | ||
1147 | switchdev_port_attr_set(p->dev, &attr); | |
1148 | } | |
1149 | ||
1150 | /* | |
1151 | * Add port to router_list | |
1152 | * list is maintained ordered by pointer value | |
1153 | * and locked by br->multicast_lock and RCU | |
1154 | */ | |
1155 | static void br_multicast_add_router(struct net_bridge *br, | |
1156 | struct net_bridge_port *port) | |
1157 | { | |
1158 | struct net_bridge_port *p; | |
1159 | struct hlist_node *slot = NULL; | |
1160 | ||
1161 | if (!hlist_unhashed(&port->rlist)) | |
1162 | return; | |
1163 | ||
1164 | hlist_for_each_entry(p, &br->router_list, rlist) { | |
1165 | if ((unsigned long) port >= (unsigned long) p) | |
1166 | break; | |
1167 | slot = &p->rlist; | |
1168 | } | |
1169 | ||
1170 | if (slot) | |
1171 | hlist_add_behind_rcu(&port->rlist, slot); | |
1172 | else | |
1173 | hlist_add_head_rcu(&port->rlist, &br->router_list); | |
1174 | br_rtr_notify(br->dev, port, RTM_NEWMDB); | |
1175 | br_port_mc_router_state_change(port, true); | |
1176 | } | |
1177 | ||
1178 | static void br_multicast_mark_router(struct net_bridge *br, | |
1179 | struct net_bridge_port *port) | |
1180 | { | |
1181 | unsigned long now = jiffies; | |
1182 | ||
1183 | if (!port) { | |
1184 | if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) { | |
1185 | if (!timer_pending(&br->multicast_router_timer)) | |
1186 | br_mc_router_state_change(br, true); | |
1187 | mod_timer(&br->multicast_router_timer, | |
1188 | now + br->multicast_querier_interval); | |
1189 | } | |
1190 | return; | |
1191 | } | |
1192 | ||
1193 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || | |
1194 | port->multicast_router == MDB_RTR_TYPE_PERM) | |
1195 | return; | |
1196 | ||
1197 | br_multicast_add_router(br, port); | |
1198 | ||
1199 | mod_timer(&port->multicast_router_timer, | |
1200 | now + br->multicast_querier_interval); | |
1201 | } | |
1202 | ||
1203 | static void br_multicast_query_received(struct net_bridge *br, | |
1204 | struct net_bridge_port *port, | |
1205 | struct bridge_mcast_other_query *query, | |
1206 | struct br_ip *saddr, | |
1207 | unsigned long max_delay) | |
1208 | { | |
1209 | if (!br_multicast_select_querier(br, port, saddr)) | |
1210 | return; | |
1211 | ||
1212 | br_multicast_update_query_timer(br, query, max_delay); | |
1213 | ||
1214 | /* Based on RFC4541, section 2.1.1 IGMP Forwarding Rules, | |
1215 | * the arrival port for IGMP Queries where the source address | |
1216 | * is 0.0.0.0 should not be added to router port list. | |
1217 | */ | |
1218 | if ((saddr->proto == htons(ETH_P_IP) && saddr->u.ip4) || | |
1219 | saddr->proto == htons(ETH_P_IPV6)) | |
1220 | br_multicast_mark_router(br, port); | |
1221 | } | |
1222 | ||
1223 | static void br_ip4_multicast_query(struct net_bridge *br, | |
1224 | struct net_bridge_port *port, | |
1225 | struct sk_buff *skb, | |
1226 | u16 vid) | |
1227 | { | |
1228 | unsigned int transport_len = ip_transport_len(skb); | |
1229 | const struct iphdr *iph = ip_hdr(skb); | |
1230 | struct igmphdr *ih = igmp_hdr(skb); | |
1231 | struct net_bridge_mdb_entry *mp; | |
1232 | struct igmpv3_query *ih3; | |
1233 | struct net_bridge_port_group *p; | |
1234 | struct net_bridge_port_group __rcu **pp; | |
1235 | struct br_ip saddr; | |
1236 | unsigned long max_delay; | |
1237 | unsigned long now = jiffies; | |
1238 | __be32 group; | |
1239 | ||
1240 | spin_lock(&br->multicast_lock); | |
1241 | if (!netif_running(br->dev) || | |
1242 | (port && port->state == BR_STATE_DISABLED)) | |
1243 | goto out; | |
1244 | ||
1245 | group = ih->group; | |
1246 | ||
1247 | if (transport_len == sizeof(*ih)) { | |
1248 | max_delay = ih->code * (HZ / IGMP_TIMER_SCALE); | |
1249 | ||
1250 | if (!max_delay) { | |
1251 | max_delay = 10 * HZ; | |
1252 | group = 0; | |
1253 | } | |
1254 | } else if (transport_len >= sizeof(*ih3)) { | |
1255 | ih3 = igmpv3_query_hdr(skb); | |
1256 | if (ih3->nsrcs) | |
1257 | goto out; | |
1258 | ||
1259 | max_delay = ih3->code ? | |
1260 | IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1; | |
1261 | } else { | |
1262 | goto out; | |
1263 | } | |
1264 | ||
1265 | if (!group) { | |
1266 | saddr.proto = htons(ETH_P_IP); | |
1267 | saddr.u.ip4 = iph->saddr; | |
1268 | ||
1269 | br_multicast_query_received(br, port, &br->ip4_other_query, | |
1270 | &saddr, max_delay); | |
1271 | goto out; | |
1272 | } | |
1273 | ||
1274 | mp = br_mdb_ip4_get(br, group, vid); | |
1275 | if (!mp) | |
1276 | goto out; | |
1277 | ||
1278 | max_delay *= br->multicast_last_member_count; | |
1279 | ||
1280 | if (mp->host_joined && | |
1281 | (timer_pending(&mp->timer) ? | |
1282 | time_after(mp->timer.expires, now + max_delay) : | |
1283 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1284 | mod_timer(&mp->timer, now + max_delay); | |
1285 | ||
1286 | for (pp = &mp->ports; | |
1287 | (p = mlock_dereference(*pp, br)) != NULL; | |
1288 | pp = &p->next) { | |
1289 | if (timer_pending(&p->timer) ? | |
1290 | time_after(p->timer.expires, now + max_delay) : | |
1291 | try_to_del_timer_sync(&p->timer) >= 0) | |
1292 | mod_timer(&p->timer, now + max_delay); | |
1293 | } | |
1294 | ||
1295 | out: | |
1296 | spin_unlock(&br->multicast_lock); | |
1297 | } | |
1298 | ||
1299 | #if IS_ENABLED(CONFIG_IPV6) | |
1300 | static int br_ip6_multicast_query(struct net_bridge *br, | |
1301 | struct net_bridge_port *port, | |
1302 | struct sk_buff *skb, | |
1303 | u16 vid) | |
1304 | { | |
1305 | unsigned int transport_len = ipv6_transport_len(skb); | |
1306 | const struct ipv6hdr *ip6h = ipv6_hdr(skb); | |
1307 | struct mld_msg *mld; | |
1308 | struct net_bridge_mdb_entry *mp; | |
1309 | struct mld2_query *mld2q; | |
1310 | struct net_bridge_port_group *p; | |
1311 | struct net_bridge_port_group __rcu **pp; | |
1312 | struct br_ip saddr; | |
1313 | unsigned long max_delay; | |
1314 | unsigned long now = jiffies; | |
1315 | unsigned int offset = skb_transport_offset(skb); | |
1316 | const struct in6_addr *group = NULL; | |
1317 | bool is_general_query; | |
1318 | int err = 0; | |
1319 | ||
1320 | spin_lock(&br->multicast_lock); | |
1321 | if (!netif_running(br->dev) || | |
1322 | (port && port->state == BR_STATE_DISABLED)) | |
1323 | goto out; | |
1324 | ||
1325 | if (transport_len == sizeof(*mld)) { | |
1326 | if (!pskb_may_pull(skb, offset + sizeof(*mld))) { | |
1327 | err = -EINVAL; | |
1328 | goto out; | |
1329 | } | |
1330 | mld = (struct mld_msg *) icmp6_hdr(skb); | |
1331 | max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay)); | |
1332 | if (max_delay) | |
1333 | group = &mld->mld_mca; | |
1334 | } else { | |
1335 | if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) { | |
1336 | err = -EINVAL; | |
1337 | goto out; | |
1338 | } | |
1339 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
1340 | if (!mld2q->mld2q_nsrcs) | |
1341 | group = &mld2q->mld2q_mca; | |
1342 | ||
1343 | max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL); | |
1344 | } | |
1345 | ||
1346 | is_general_query = group && ipv6_addr_any(group); | |
1347 | ||
1348 | if (is_general_query) { | |
1349 | saddr.proto = htons(ETH_P_IPV6); | |
1350 | saddr.u.ip6 = ip6h->saddr; | |
1351 | ||
1352 | br_multicast_query_received(br, port, &br->ip6_other_query, | |
1353 | &saddr, max_delay); | |
1354 | goto out; | |
1355 | } else if (!group) { | |
1356 | goto out; | |
1357 | } | |
1358 | ||
1359 | mp = br_mdb_ip6_get(br, group, vid); | |
1360 | if (!mp) | |
1361 | goto out; | |
1362 | ||
1363 | max_delay *= br->multicast_last_member_count; | |
1364 | if (mp->host_joined && | |
1365 | (timer_pending(&mp->timer) ? | |
1366 | time_after(mp->timer.expires, now + max_delay) : | |
1367 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1368 | mod_timer(&mp->timer, now + max_delay); | |
1369 | ||
1370 | for (pp = &mp->ports; | |
1371 | (p = mlock_dereference(*pp, br)) != NULL; | |
1372 | pp = &p->next) { | |
1373 | if (timer_pending(&p->timer) ? | |
1374 | time_after(p->timer.expires, now + max_delay) : | |
1375 | try_to_del_timer_sync(&p->timer) >= 0) | |
1376 | mod_timer(&p->timer, now + max_delay); | |
1377 | } | |
1378 | ||
1379 | out: | |
1380 | spin_unlock(&br->multicast_lock); | |
1381 | return err; | |
1382 | } | |
1383 | #endif | |
1384 | ||
1385 | static void | |
1386 | br_multicast_leave_group(struct net_bridge *br, | |
1387 | struct net_bridge_port *port, | |
1388 | struct br_ip *group, | |
1389 | struct bridge_mcast_other_query *other_query, | |
1390 | struct bridge_mcast_own_query *own_query, | |
1391 | const unsigned char *src) | |
1392 | { | |
1393 | struct net_bridge_mdb_entry *mp; | |
1394 | struct net_bridge_port_group *p; | |
1395 | unsigned long now; | |
1396 | unsigned long time; | |
1397 | ||
1398 | spin_lock(&br->multicast_lock); | |
1399 | if (!netif_running(br->dev) || | |
1400 | (port && port->state == BR_STATE_DISABLED)) | |
1401 | goto out; | |
1402 | ||
1403 | mp = br_mdb_ip_get(br, group); | |
1404 | if (!mp) | |
1405 | goto out; | |
1406 | ||
1407 | if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) { | |
1408 | struct net_bridge_port_group __rcu **pp; | |
1409 | ||
1410 | for (pp = &mp->ports; | |
1411 | (p = mlock_dereference(*pp, br)) != NULL; | |
1412 | pp = &p->next) { | |
1413 | if (!br_port_group_equal(p, port, src)) | |
1414 | continue; | |
1415 | ||
1416 | rcu_assign_pointer(*pp, p->next); | |
1417 | hlist_del_init(&p->mglist); | |
1418 | del_timer(&p->timer); | |
1419 | kfree_rcu(p, rcu); | |
1420 | br_mdb_notify(br->dev, port, group, RTM_DELMDB, | |
1421 | p->flags); | |
1422 | ||
1423 | if (!mp->ports && !mp->host_joined && | |
1424 | netif_running(br->dev)) | |
1425 | mod_timer(&mp->timer, jiffies); | |
1426 | } | |
1427 | goto out; | |
1428 | } | |
1429 | ||
1430 | if (timer_pending(&other_query->timer)) | |
1431 | goto out; | |
1432 | ||
1433 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { | |
1434 | __br_multicast_send_query(br, port, &mp->addr); | |
1435 | ||
1436 | time = jiffies + br->multicast_last_member_count * | |
1437 | br->multicast_last_member_interval; | |
1438 | ||
1439 | mod_timer(&own_query->timer, time); | |
1440 | ||
1441 | for (p = mlock_dereference(mp->ports, br); | |
1442 | p != NULL; | |
1443 | p = mlock_dereference(p->next, br)) { | |
1444 | if (!br_port_group_equal(p, port, src)) | |
1445 | continue; | |
1446 | ||
1447 | if (!hlist_unhashed(&p->mglist) && | |
1448 | (timer_pending(&p->timer) ? | |
1449 | time_after(p->timer.expires, time) : | |
1450 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1451 | mod_timer(&p->timer, time); | |
1452 | } | |
1453 | ||
1454 | break; | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | now = jiffies; | |
1459 | time = now + br->multicast_last_member_count * | |
1460 | br->multicast_last_member_interval; | |
1461 | ||
1462 | if (!port) { | |
1463 | if (mp->host_joined && | |
1464 | (timer_pending(&mp->timer) ? | |
1465 | time_after(mp->timer.expires, time) : | |
1466 | try_to_del_timer_sync(&mp->timer) >= 0)) { | |
1467 | mod_timer(&mp->timer, time); | |
1468 | } | |
1469 | ||
1470 | goto out; | |
1471 | } | |
1472 | ||
1473 | for (p = mlock_dereference(mp->ports, br); | |
1474 | p != NULL; | |
1475 | p = mlock_dereference(p->next, br)) { | |
1476 | if (p->port != port) | |
1477 | continue; | |
1478 | ||
1479 | if (!hlist_unhashed(&p->mglist) && | |
1480 | (timer_pending(&p->timer) ? | |
1481 | time_after(p->timer.expires, time) : | |
1482 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1483 | mod_timer(&p->timer, time); | |
1484 | } | |
1485 | ||
1486 | break; | |
1487 | } | |
1488 | out: | |
1489 | spin_unlock(&br->multicast_lock); | |
1490 | } | |
1491 | ||
1492 | static void br_ip4_multicast_leave_group(struct net_bridge *br, | |
1493 | struct net_bridge_port *port, | |
1494 | __be32 group, | |
1495 | __u16 vid, | |
1496 | const unsigned char *src) | |
1497 | { | |
1498 | struct br_ip br_group; | |
1499 | struct bridge_mcast_own_query *own_query; | |
1500 | ||
1501 | if (ipv4_is_local_multicast(group)) | |
1502 | return; | |
1503 | ||
1504 | own_query = port ? &port->ip4_own_query : &br->ip4_own_query; | |
1505 | ||
1506 | br_group.u.ip4 = group; | |
1507 | br_group.proto = htons(ETH_P_IP); | |
1508 | br_group.vid = vid; | |
1509 | ||
1510 | br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query, | |
1511 | own_query, src); | |
1512 | } | |
1513 | ||
1514 | #if IS_ENABLED(CONFIG_IPV6) | |
1515 | static void br_ip6_multicast_leave_group(struct net_bridge *br, | |
1516 | struct net_bridge_port *port, | |
1517 | const struct in6_addr *group, | |
1518 | __u16 vid, | |
1519 | const unsigned char *src) | |
1520 | { | |
1521 | struct br_ip br_group; | |
1522 | struct bridge_mcast_own_query *own_query; | |
1523 | ||
1524 | if (ipv6_addr_is_ll_all_nodes(group)) | |
1525 | return; | |
1526 | ||
1527 | own_query = port ? &port->ip6_own_query : &br->ip6_own_query; | |
1528 | ||
1529 | br_group.u.ip6 = *group; | |
1530 | br_group.proto = htons(ETH_P_IPV6); | |
1531 | br_group.vid = vid; | |
1532 | ||
1533 | br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query, | |
1534 | own_query, src); | |
1535 | } | |
1536 | #endif | |
1537 | ||
1538 | static void br_multicast_err_count(const struct net_bridge *br, | |
1539 | const struct net_bridge_port *p, | |
1540 | __be16 proto) | |
1541 | { | |
1542 | struct bridge_mcast_stats __percpu *stats; | |
1543 | struct bridge_mcast_stats *pstats; | |
1544 | ||
1545 | if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) | |
1546 | return; | |
1547 | ||
1548 | if (p) | |
1549 | stats = p->mcast_stats; | |
1550 | else | |
1551 | stats = br->mcast_stats; | |
1552 | if (WARN_ON(!stats)) | |
1553 | return; | |
1554 | ||
1555 | pstats = this_cpu_ptr(stats); | |
1556 | ||
1557 | u64_stats_update_begin(&pstats->syncp); | |
1558 | switch (proto) { | |
1559 | case htons(ETH_P_IP): | |
1560 | pstats->mstats.igmp_parse_errors++; | |
1561 | break; | |
1562 | #if IS_ENABLED(CONFIG_IPV6) | |
1563 | case htons(ETH_P_IPV6): | |
1564 | pstats->mstats.mld_parse_errors++; | |
1565 | break; | |
1566 | #endif | |
1567 | } | |
1568 | u64_stats_update_end(&pstats->syncp); | |
1569 | } | |
1570 | ||
1571 | static void br_multicast_pim(struct net_bridge *br, | |
1572 | struct net_bridge_port *port, | |
1573 | const struct sk_buff *skb) | |
1574 | { | |
1575 | unsigned int offset = skb_transport_offset(skb); | |
1576 | struct pimhdr *pimhdr, _pimhdr; | |
1577 | ||
1578 | pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr); | |
1579 | if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION || | |
1580 | pim_hdr_type(pimhdr) != PIM_TYPE_HELLO) | |
1581 | return; | |
1582 | ||
1583 | br_multicast_mark_router(br, port); | |
1584 | } | |
1585 | ||
1586 | static int br_multicast_ipv4_rcv(struct net_bridge *br, | |
1587 | struct net_bridge_port *port, | |
1588 | struct sk_buff *skb, | |
1589 | u16 vid) | |
1590 | { | |
1591 | const unsigned char *src; | |
1592 | struct igmphdr *ih; | |
1593 | int err; | |
1594 | ||
1595 | err = ip_mc_check_igmp(skb); | |
1596 | ||
1597 | if (err == -ENOMSG) { | |
1598 | if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) { | |
1599 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
1600 | } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) { | |
1601 | if (ip_hdr(skb)->protocol == IPPROTO_PIM) | |
1602 | br_multicast_pim(br, port, skb); | |
1603 | } | |
1604 | return 0; | |
1605 | } else if (err < 0) { | |
1606 | br_multicast_err_count(br, port, skb->protocol); | |
1607 | return err; | |
1608 | } | |
1609 | ||
1610 | ih = igmp_hdr(skb); | |
1611 | src = eth_hdr(skb)->h_source; | |
1612 | BR_INPUT_SKB_CB(skb)->igmp = ih->type; | |
1613 | ||
1614 | switch (ih->type) { | |
1615 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
1616 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
1617 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
1618 | err = br_ip4_multicast_add_group(br, port, ih->group, vid, src); | |
1619 | break; | |
1620 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
1621 | err = br_ip4_multicast_igmp3_report(br, port, skb, vid); | |
1622 | break; | |
1623 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
1624 | br_ip4_multicast_query(br, port, skb, vid); | |
1625 | break; | |
1626 | case IGMP_HOST_LEAVE_MESSAGE: | |
1627 | br_ip4_multicast_leave_group(br, port, ih->group, vid, src); | |
1628 | break; | |
1629 | } | |
1630 | ||
1631 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, | |
1632 | BR_MCAST_DIR_RX); | |
1633 | ||
1634 | return err; | |
1635 | } | |
1636 | ||
1637 | #if IS_ENABLED(CONFIG_IPV6) | |
1638 | static int br_multicast_ipv6_rcv(struct net_bridge *br, | |
1639 | struct net_bridge_port *port, | |
1640 | struct sk_buff *skb, | |
1641 | u16 vid) | |
1642 | { | |
1643 | const unsigned char *src; | |
1644 | struct mld_msg *mld; | |
1645 | int err; | |
1646 | ||
1647 | err = ipv6_mc_check_mld(skb); | |
1648 | ||
1649 | if (err == -ENOMSG) { | |
1650 | if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr)) | |
1651 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
1652 | return 0; | |
1653 | } else if (err < 0) { | |
1654 | br_multicast_err_count(br, port, skb->protocol); | |
1655 | return err; | |
1656 | } | |
1657 | ||
1658 | mld = (struct mld_msg *)skb_transport_header(skb); | |
1659 | BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type; | |
1660 | ||
1661 | switch (mld->mld_type) { | |
1662 | case ICMPV6_MGM_REPORT: | |
1663 | src = eth_hdr(skb)->h_source; | |
1664 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
1665 | err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid, | |
1666 | src); | |
1667 | break; | |
1668 | case ICMPV6_MLD2_REPORT: | |
1669 | err = br_ip6_multicast_mld2_report(br, port, skb, vid); | |
1670 | break; | |
1671 | case ICMPV6_MGM_QUERY: | |
1672 | err = br_ip6_multicast_query(br, port, skb, vid); | |
1673 | break; | |
1674 | case ICMPV6_MGM_REDUCTION: | |
1675 | src = eth_hdr(skb)->h_source; | |
1676 | br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src); | |
1677 | break; | |
1678 | } | |
1679 | ||
1680 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, | |
1681 | BR_MCAST_DIR_RX); | |
1682 | ||
1683 | return err; | |
1684 | } | |
1685 | #endif | |
1686 | ||
1687 | int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, | |
1688 | struct sk_buff *skb, u16 vid) | |
1689 | { | |
1690 | int ret = 0; | |
1691 | ||
1692 | BR_INPUT_SKB_CB(skb)->igmp = 0; | |
1693 | BR_INPUT_SKB_CB(skb)->mrouters_only = 0; | |
1694 | ||
1695 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
1696 | return 0; | |
1697 | ||
1698 | switch (skb->protocol) { | |
1699 | case htons(ETH_P_IP): | |
1700 | ret = br_multicast_ipv4_rcv(br, port, skb, vid); | |
1701 | break; | |
1702 | #if IS_ENABLED(CONFIG_IPV6) | |
1703 | case htons(ETH_P_IPV6): | |
1704 | ret = br_multicast_ipv6_rcv(br, port, skb, vid); | |
1705 | break; | |
1706 | #endif | |
1707 | } | |
1708 | ||
1709 | return ret; | |
1710 | } | |
1711 | ||
1712 | static void br_multicast_query_expired(struct net_bridge *br, | |
1713 | struct bridge_mcast_own_query *query, | |
1714 | struct bridge_mcast_querier *querier) | |
1715 | { | |
1716 | spin_lock(&br->multicast_lock); | |
1717 | if (query->startup_sent < br->multicast_startup_query_count) | |
1718 | query->startup_sent++; | |
1719 | ||
1720 | RCU_INIT_POINTER(querier->port, NULL); | |
1721 | br_multicast_send_query(br, NULL, query); | |
1722 | spin_unlock(&br->multicast_lock); | |
1723 | } | |
1724 | ||
1725 | static void br_ip4_multicast_query_expired(struct timer_list *t) | |
1726 | { | |
1727 | struct net_bridge *br = from_timer(br, t, ip4_own_query.timer); | |
1728 | ||
1729 | br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier); | |
1730 | } | |
1731 | ||
1732 | #if IS_ENABLED(CONFIG_IPV6) | |
1733 | static void br_ip6_multicast_query_expired(struct timer_list *t) | |
1734 | { | |
1735 | struct net_bridge *br = from_timer(br, t, ip6_own_query.timer); | |
1736 | ||
1737 | br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier); | |
1738 | } | |
1739 | #endif | |
1740 | ||
1741 | void br_multicast_init(struct net_bridge *br) | |
1742 | { | |
1743 | br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX; | |
1744 | ||
1745 | br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
1746 | br->multicast_last_member_count = 2; | |
1747 | br->multicast_startup_query_count = 2; | |
1748 | ||
1749 | br->multicast_last_member_interval = HZ; | |
1750 | br->multicast_query_response_interval = 10 * HZ; | |
1751 | br->multicast_startup_query_interval = 125 * HZ / 4; | |
1752 | br->multicast_query_interval = 125 * HZ; | |
1753 | br->multicast_querier_interval = 255 * HZ; | |
1754 | br->multicast_membership_interval = 260 * HZ; | |
1755 | ||
1756 | br->ip4_other_query.delay_time = 0; | |
1757 | br->ip4_querier.port = NULL; | |
1758 | br->multicast_igmp_version = 2; | |
1759 | #if IS_ENABLED(CONFIG_IPV6) | |
1760 | br->multicast_mld_version = 1; | |
1761 | br->ip6_other_query.delay_time = 0; | |
1762 | br->ip6_querier.port = NULL; | |
1763 | #endif | |
1764 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true); | |
1765 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); | |
1766 | ||
1767 | spin_lock_init(&br->multicast_lock); | |
1768 | timer_setup(&br->multicast_router_timer, | |
1769 | br_multicast_local_router_expired, 0); | |
1770 | timer_setup(&br->ip4_other_query.timer, | |
1771 | br_ip4_multicast_querier_expired, 0); | |
1772 | timer_setup(&br->ip4_own_query.timer, | |
1773 | br_ip4_multicast_query_expired, 0); | |
1774 | #if IS_ENABLED(CONFIG_IPV6) | |
1775 | timer_setup(&br->ip6_other_query.timer, | |
1776 | br_ip6_multicast_querier_expired, 0); | |
1777 | timer_setup(&br->ip6_own_query.timer, | |
1778 | br_ip6_multicast_query_expired, 0); | |
1779 | #endif | |
1780 | INIT_HLIST_HEAD(&br->mdb_list); | |
1781 | } | |
1782 | ||
1783 | static void __br_multicast_open(struct net_bridge *br, | |
1784 | struct bridge_mcast_own_query *query) | |
1785 | { | |
1786 | query->startup_sent = 0; | |
1787 | ||
1788 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
1789 | return; | |
1790 | ||
1791 | mod_timer(&query->timer, jiffies); | |
1792 | } | |
1793 | ||
1794 | void br_multicast_open(struct net_bridge *br) | |
1795 | { | |
1796 | __br_multicast_open(br, &br->ip4_own_query); | |
1797 | #if IS_ENABLED(CONFIG_IPV6) | |
1798 | __br_multicast_open(br, &br->ip6_own_query); | |
1799 | #endif | |
1800 | } | |
1801 | ||
1802 | void br_multicast_stop(struct net_bridge *br) | |
1803 | { | |
1804 | del_timer_sync(&br->multicast_router_timer); | |
1805 | del_timer_sync(&br->ip4_other_query.timer); | |
1806 | del_timer_sync(&br->ip4_own_query.timer); | |
1807 | #if IS_ENABLED(CONFIG_IPV6) | |
1808 | del_timer_sync(&br->ip6_other_query.timer); | |
1809 | del_timer_sync(&br->ip6_own_query.timer); | |
1810 | #endif | |
1811 | } | |
1812 | ||
1813 | void br_multicast_dev_del(struct net_bridge *br) | |
1814 | { | |
1815 | struct net_bridge_mdb_entry *mp; | |
1816 | struct hlist_node *tmp; | |
1817 | ||
1818 | spin_lock_bh(&br->multicast_lock); | |
1819 | hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node) { | |
1820 | del_timer(&mp->timer); | |
1821 | rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode, | |
1822 | br_mdb_rht_params); | |
1823 | hlist_del_rcu(&mp->mdb_node); | |
1824 | kfree_rcu(mp, rcu); | |
1825 | } | |
1826 | spin_unlock_bh(&br->multicast_lock); | |
1827 | ||
1828 | rcu_barrier(); | |
1829 | } | |
1830 | ||
1831 | int br_multicast_set_router(struct net_bridge *br, unsigned long val) | |
1832 | { | |
1833 | int err = -EINVAL; | |
1834 | ||
1835 | spin_lock_bh(&br->multicast_lock); | |
1836 | ||
1837 | switch (val) { | |
1838 | case MDB_RTR_TYPE_DISABLED: | |
1839 | case MDB_RTR_TYPE_PERM: | |
1840 | br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM); | |
1841 | del_timer(&br->multicast_router_timer); | |
1842 | br->multicast_router = val; | |
1843 | err = 0; | |
1844 | break; | |
1845 | case MDB_RTR_TYPE_TEMP_QUERY: | |
1846 | if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY) | |
1847 | br_mc_router_state_change(br, false); | |
1848 | br->multicast_router = val; | |
1849 | err = 0; | |
1850 | break; | |
1851 | } | |
1852 | ||
1853 | spin_unlock_bh(&br->multicast_lock); | |
1854 | ||
1855 | return err; | |
1856 | } | |
1857 | ||
1858 | static void __del_port_router(struct net_bridge_port *p) | |
1859 | { | |
1860 | if (hlist_unhashed(&p->rlist)) | |
1861 | return; | |
1862 | hlist_del_init_rcu(&p->rlist); | |
1863 | br_rtr_notify(p->br->dev, p, RTM_DELMDB); | |
1864 | br_port_mc_router_state_change(p, false); | |
1865 | ||
1866 | /* don't allow timer refresh */ | |
1867 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
1868 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
1869 | } | |
1870 | ||
1871 | int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val) | |
1872 | { | |
1873 | struct net_bridge *br = p->br; | |
1874 | unsigned long now = jiffies; | |
1875 | int err = -EINVAL; | |
1876 | ||
1877 | spin_lock(&br->multicast_lock); | |
1878 | if (p->multicast_router == val) { | |
1879 | /* Refresh the temp router port timer */ | |
1880 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
1881 | mod_timer(&p->multicast_router_timer, | |
1882 | now + br->multicast_querier_interval); | |
1883 | err = 0; | |
1884 | goto unlock; | |
1885 | } | |
1886 | switch (val) { | |
1887 | case MDB_RTR_TYPE_DISABLED: | |
1888 | p->multicast_router = MDB_RTR_TYPE_DISABLED; | |
1889 | __del_port_router(p); | |
1890 | del_timer(&p->multicast_router_timer); | |
1891 | break; | |
1892 | case MDB_RTR_TYPE_TEMP_QUERY: | |
1893 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
1894 | __del_port_router(p); | |
1895 | break; | |
1896 | case MDB_RTR_TYPE_PERM: | |
1897 | p->multicast_router = MDB_RTR_TYPE_PERM; | |
1898 | del_timer(&p->multicast_router_timer); | |
1899 | br_multicast_add_router(br, p); | |
1900 | break; | |
1901 | case MDB_RTR_TYPE_TEMP: | |
1902 | p->multicast_router = MDB_RTR_TYPE_TEMP; | |
1903 | br_multicast_mark_router(br, p); | |
1904 | break; | |
1905 | default: | |
1906 | goto unlock; | |
1907 | } | |
1908 | err = 0; | |
1909 | unlock: | |
1910 | spin_unlock(&br->multicast_lock); | |
1911 | ||
1912 | return err; | |
1913 | } | |
1914 | ||
1915 | static void br_multicast_start_querier(struct net_bridge *br, | |
1916 | struct bridge_mcast_own_query *query) | |
1917 | { | |
1918 | struct net_bridge_port *port; | |
1919 | ||
1920 | __br_multicast_open(br, query); | |
1921 | ||
1922 | list_for_each_entry(port, &br->port_list, list) { | |
1923 | if (port->state == BR_STATE_DISABLED || | |
1924 | port->state == BR_STATE_BLOCKING) | |
1925 | continue; | |
1926 | ||
1927 | if (query == &br->ip4_own_query) | |
1928 | br_multicast_enable(&port->ip4_own_query); | |
1929 | #if IS_ENABLED(CONFIG_IPV6) | |
1930 | else | |
1931 | br_multicast_enable(&port->ip6_own_query); | |
1932 | #endif | |
1933 | } | |
1934 | } | |
1935 | ||
1936 | int br_multicast_toggle(struct net_bridge *br, unsigned long val) | |
1937 | { | |
1938 | struct net_bridge_port *port; | |
1939 | ||
1940 | spin_lock_bh(&br->multicast_lock); | |
1941 | if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val) | |
1942 | goto unlock; | |
1943 | ||
1944 | br_mc_disabled_update(br->dev, val); | |
1945 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val); | |
1946 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
1947 | goto unlock; | |
1948 | ||
1949 | if (!netif_running(br->dev)) | |
1950 | goto unlock; | |
1951 | ||
1952 | br_multicast_open(br); | |
1953 | list_for_each_entry(port, &br->port_list, list) | |
1954 | __br_multicast_enable_port(port); | |
1955 | ||
1956 | unlock: | |
1957 | spin_unlock_bh(&br->multicast_lock); | |
1958 | ||
1959 | return 0; | |
1960 | } | |
1961 | ||
1962 | bool br_multicast_enabled(const struct net_device *dev) | |
1963 | { | |
1964 | struct net_bridge *br = netdev_priv(dev); | |
1965 | ||
1966 | return !!br_opt_get(br, BROPT_MULTICAST_ENABLED); | |
1967 | } | |
1968 | EXPORT_SYMBOL_GPL(br_multicast_enabled); | |
1969 | ||
1970 | bool br_multicast_router(const struct net_device *dev) | |
1971 | { | |
1972 | struct net_bridge *br = netdev_priv(dev); | |
1973 | bool is_router; | |
1974 | ||
1975 | spin_lock_bh(&br->multicast_lock); | |
1976 | is_router = br_multicast_is_router(br); | |
1977 | spin_unlock_bh(&br->multicast_lock); | |
1978 | return is_router; | |
1979 | } | |
1980 | EXPORT_SYMBOL_GPL(br_multicast_router); | |
1981 | ||
1982 | int br_multicast_set_querier(struct net_bridge *br, unsigned long val) | |
1983 | { | |
1984 | unsigned long max_delay; | |
1985 | ||
1986 | val = !!val; | |
1987 | ||
1988 | spin_lock_bh(&br->multicast_lock); | |
1989 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val) | |
1990 | goto unlock; | |
1991 | ||
1992 | br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val); | |
1993 | if (!val) | |
1994 | goto unlock; | |
1995 | ||
1996 | max_delay = br->multicast_query_response_interval; | |
1997 | ||
1998 | if (!timer_pending(&br->ip4_other_query.timer)) | |
1999 | br->ip4_other_query.delay_time = jiffies + max_delay; | |
2000 | ||
2001 | br_multicast_start_querier(br, &br->ip4_own_query); | |
2002 | ||
2003 | #if IS_ENABLED(CONFIG_IPV6) | |
2004 | if (!timer_pending(&br->ip6_other_query.timer)) | |
2005 | br->ip6_other_query.delay_time = jiffies + max_delay; | |
2006 | ||
2007 | br_multicast_start_querier(br, &br->ip6_own_query); | |
2008 | #endif | |
2009 | ||
2010 | unlock: | |
2011 | spin_unlock_bh(&br->multicast_lock); | |
2012 | ||
2013 | return 0; | |
2014 | } | |
2015 | ||
2016 | int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val) | |
2017 | { | |
2018 | /* Currently we support only version 2 and 3 */ | |
2019 | switch (val) { | |
2020 | case 2: | |
2021 | case 3: | |
2022 | break; | |
2023 | default: | |
2024 | return -EINVAL; | |
2025 | } | |
2026 | ||
2027 | spin_lock_bh(&br->multicast_lock); | |
2028 | br->multicast_igmp_version = val; | |
2029 | spin_unlock_bh(&br->multicast_lock); | |
2030 | ||
2031 | return 0; | |
2032 | } | |
2033 | ||
2034 | #if IS_ENABLED(CONFIG_IPV6) | |
2035 | int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val) | |
2036 | { | |
2037 | /* Currently we support version 1 and 2 */ | |
2038 | switch (val) { | |
2039 | case 1: | |
2040 | case 2: | |
2041 | break; | |
2042 | default: | |
2043 | return -EINVAL; | |
2044 | } | |
2045 | ||
2046 | spin_lock_bh(&br->multicast_lock); | |
2047 | br->multicast_mld_version = val; | |
2048 | spin_unlock_bh(&br->multicast_lock); | |
2049 | ||
2050 | return 0; | |
2051 | } | |
2052 | #endif | |
2053 | ||
2054 | /** | |
2055 | * br_multicast_list_adjacent - Returns snooped multicast addresses | |
2056 | * @dev: The bridge port adjacent to which to retrieve addresses | |
2057 | * @br_ip_list: The list to store found, snooped multicast IP addresses in | |
2058 | * | |
2059 | * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast | |
2060 | * snooping feature on all bridge ports of dev's bridge device, excluding | |
2061 | * the addresses from dev itself. | |
2062 | * | |
2063 | * Returns the number of items added to br_ip_list. | |
2064 | * | |
2065 | * Notes: | |
2066 | * - br_ip_list needs to be initialized by caller | |
2067 | * - br_ip_list might contain duplicates in the end | |
2068 | * (needs to be taken care of by caller) | |
2069 | * - br_ip_list needs to be freed by caller | |
2070 | */ | |
2071 | int br_multicast_list_adjacent(struct net_device *dev, | |
2072 | struct list_head *br_ip_list) | |
2073 | { | |
2074 | struct net_bridge *br; | |
2075 | struct net_bridge_port *port; | |
2076 | struct net_bridge_port_group *group; | |
2077 | struct br_ip_list *entry; | |
2078 | int count = 0; | |
2079 | ||
2080 | rcu_read_lock(); | |
2081 | if (!br_ip_list || !br_port_exists(dev)) | |
2082 | goto unlock; | |
2083 | ||
2084 | port = br_port_get_rcu(dev); | |
2085 | if (!port || !port->br) | |
2086 | goto unlock; | |
2087 | ||
2088 | br = port->br; | |
2089 | ||
2090 | list_for_each_entry_rcu(port, &br->port_list, list) { | |
2091 | if (!port->dev || port->dev == dev) | |
2092 | continue; | |
2093 | ||
2094 | hlist_for_each_entry_rcu(group, &port->mglist, mglist) { | |
2095 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); | |
2096 | if (!entry) | |
2097 | goto unlock; | |
2098 | ||
2099 | entry->addr = group->addr; | |
2100 | list_add(&entry->list, br_ip_list); | |
2101 | count++; | |
2102 | } | |
2103 | } | |
2104 | ||
2105 | unlock: | |
2106 | rcu_read_unlock(); | |
2107 | return count; | |
2108 | } | |
2109 | EXPORT_SYMBOL_GPL(br_multicast_list_adjacent); | |
2110 | ||
2111 | /** | |
2112 | * br_multicast_has_querier_anywhere - Checks for a querier on a bridge | |
2113 | * @dev: The bridge port providing the bridge on which to check for a querier | |
2114 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2115 | * | |
2116 | * Checks whether the given interface has a bridge on top and if so returns | |
2117 | * true if a valid querier exists anywhere on the bridged link layer. | |
2118 | * Otherwise returns false. | |
2119 | */ | |
2120 | bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto) | |
2121 | { | |
2122 | struct net_bridge *br; | |
2123 | struct net_bridge_port *port; | |
2124 | struct ethhdr eth; | |
2125 | bool ret = false; | |
2126 | ||
2127 | rcu_read_lock(); | |
2128 | if (!br_port_exists(dev)) | |
2129 | goto unlock; | |
2130 | ||
2131 | port = br_port_get_rcu(dev); | |
2132 | if (!port || !port->br) | |
2133 | goto unlock; | |
2134 | ||
2135 | br = port->br; | |
2136 | ||
2137 | memset(ð, 0, sizeof(eth)); | |
2138 | eth.h_proto = htons(proto); | |
2139 | ||
2140 | ret = br_multicast_querier_exists(br, ð); | |
2141 | ||
2142 | unlock: | |
2143 | rcu_read_unlock(); | |
2144 | return ret; | |
2145 | } | |
2146 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere); | |
2147 | ||
2148 | /** | |
2149 | * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port | |
2150 | * @dev: The bridge port adjacent to which to check for a querier | |
2151 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2152 | * | |
2153 | * Checks whether the given interface has a bridge on top and if so returns | |
2154 | * true if a selected querier is behind one of the other ports of this | |
2155 | * bridge. Otherwise returns false. | |
2156 | */ | |
2157 | bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto) | |
2158 | { | |
2159 | struct net_bridge *br; | |
2160 | struct net_bridge_port *port; | |
2161 | bool ret = false; | |
2162 | ||
2163 | rcu_read_lock(); | |
2164 | if (!br_port_exists(dev)) | |
2165 | goto unlock; | |
2166 | ||
2167 | port = br_port_get_rcu(dev); | |
2168 | if (!port || !port->br) | |
2169 | goto unlock; | |
2170 | ||
2171 | br = port->br; | |
2172 | ||
2173 | switch (proto) { | |
2174 | case ETH_P_IP: | |
2175 | if (!timer_pending(&br->ip4_other_query.timer) || | |
2176 | rcu_dereference(br->ip4_querier.port) == port) | |
2177 | goto unlock; | |
2178 | break; | |
2179 | #if IS_ENABLED(CONFIG_IPV6) | |
2180 | case ETH_P_IPV6: | |
2181 | if (!timer_pending(&br->ip6_other_query.timer) || | |
2182 | rcu_dereference(br->ip6_querier.port) == port) | |
2183 | goto unlock; | |
2184 | break; | |
2185 | #endif | |
2186 | default: | |
2187 | goto unlock; | |
2188 | } | |
2189 | ||
2190 | ret = true; | |
2191 | unlock: | |
2192 | rcu_read_unlock(); | |
2193 | return ret; | |
2194 | } | |
2195 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent); | |
2196 | ||
2197 | static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, | |
2198 | const struct sk_buff *skb, u8 type, u8 dir) | |
2199 | { | |
2200 | struct bridge_mcast_stats *pstats = this_cpu_ptr(stats); | |
2201 | __be16 proto = skb->protocol; | |
2202 | unsigned int t_len; | |
2203 | ||
2204 | u64_stats_update_begin(&pstats->syncp); | |
2205 | switch (proto) { | |
2206 | case htons(ETH_P_IP): | |
2207 | t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb); | |
2208 | switch (type) { | |
2209 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
2210 | pstats->mstats.igmp_v1reports[dir]++; | |
2211 | break; | |
2212 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
2213 | pstats->mstats.igmp_v2reports[dir]++; | |
2214 | break; | |
2215 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
2216 | pstats->mstats.igmp_v3reports[dir]++; | |
2217 | break; | |
2218 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
2219 | if (t_len != sizeof(struct igmphdr)) { | |
2220 | pstats->mstats.igmp_v3queries[dir]++; | |
2221 | } else { | |
2222 | unsigned int offset = skb_transport_offset(skb); | |
2223 | struct igmphdr *ih, _ihdr; | |
2224 | ||
2225 | ih = skb_header_pointer(skb, offset, | |
2226 | sizeof(_ihdr), &_ihdr); | |
2227 | if (!ih) | |
2228 | break; | |
2229 | if (!ih->code) | |
2230 | pstats->mstats.igmp_v1queries[dir]++; | |
2231 | else | |
2232 | pstats->mstats.igmp_v2queries[dir]++; | |
2233 | } | |
2234 | break; | |
2235 | case IGMP_HOST_LEAVE_MESSAGE: | |
2236 | pstats->mstats.igmp_leaves[dir]++; | |
2237 | break; | |
2238 | } | |
2239 | break; | |
2240 | #if IS_ENABLED(CONFIG_IPV6) | |
2241 | case htons(ETH_P_IPV6): | |
2242 | t_len = ntohs(ipv6_hdr(skb)->payload_len) + | |
2243 | sizeof(struct ipv6hdr); | |
2244 | t_len -= skb_network_header_len(skb); | |
2245 | switch (type) { | |
2246 | case ICMPV6_MGM_REPORT: | |
2247 | pstats->mstats.mld_v1reports[dir]++; | |
2248 | break; | |
2249 | case ICMPV6_MLD2_REPORT: | |
2250 | pstats->mstats.mld_v2reports[dir]++; | |
2251 | break; | |
2252 | case ICMPV6_MGM_QUERY: | |
2253 | if (t_len != sizeof(struct mld_msg)) | |
2254 | pstats->mstats.mld_v2queries[dir]++; | |
2255 | else | |
2256 | pstats->mstats.mld_v1queries[dir]++; | |
2257 | break; | |
2258 | case ICMPV6_MGM_REDUCTION: | |
2259 | pstats->mstats.mld_leaves[dir]++; | |
2260 | break; | |
2261 | } | |
2262 | break; | |
2263 | #endif /* CONFIG_IPV6 */ | |
2264 | } | |
2265 | u64_stats_update_end(&pstats->syncp); | |
2266 | } | |
2267 | ||
2268 | void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, | |
2269 | const struct sk_buff *skb, u8 type, u8 dir) | |
2270 | { | |
2271 | struct bridge_mcast_stats __percpu *stats; | |
2272 | ||
2273 | /* if multicast_disabled is true then igmp type can't be set */ | |
2274 | if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) | |
2275 | return; | |
2276 | ||
2277 | if (p) | |
2278 | stats = p->mcast_stats; | |
2279 | else | |
2280 | stats = br->mcast_stats; | |
2281 | if (WARN_ON(!stats)) | |
2282 | return; | |
2283 | ||
2284 | br_mcast_stats_add(stats, skb, type, dir); | |
2285 | } | |
2286 | ||
2287 | int br_multicast_init_stats(struct net_bridge *br) | |
2288 | { | |
2289 | br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); | |
2290 | if (!br->mcast_stats) | |
2291 | return -ENOMEM; | |
2292 | ||
2293 | return 0; | |
2294 | } | |
2295 | ||
2296 | void br_multicast_uninit_stats(struct net_bridge *br) | |
2297 | { | |
2298 | free_percpu(br->mcast_stats); | |
2299 | } | |
2300 | ||
2301 | static void mcast_stats_add_dir(u64 *dst, u64 *src) | |
2302 | { | |
2303 | dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX]; | |
2304 | dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX]; | |
2305 | } | |
2306 | ||
2307 | void br_multicast_get_stats(const struct net_bridge *br, | |
2308 | const struct net_bridge_port *p, | |
2309 | struct br_mcast_stats *dest) | |
2310 | { | |
2311 | struct bridge_mcast_stats __percpu *stats; | |
2312 | struct br_mcast_stats tdst; | |
2313 | int i; | |
2314 | ||
2315 | memset(dest, 0, sizeof(*dest)); | |
2316 | if (p) | |
2317 | stats = p->mcast_stats; | |
2318 | else | |
2319 | stats = br->mcast_stats; | |
2320 | if (WARN_ON(!stats)) | |
2321 | return; | |
2322 | ||
2323 | memset(&tdst, 0, sizeof(tdst)); | |
2324 | for_each_possible_cpu(i) { | |
2325 | struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i); | |
2326 | struct br_mcast_stats temp; | |
2327 | unsigned int start; | |
2328 | ||
2329 | do { | |
2330 | start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); | |
2331 | memcpy(&temp, &cpu_stats->mstats, sizeof(temp)); | |
2332 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); | |
2333 | ||
2334 | mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries); | |
2335 | mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries); | |
2336 | mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries); | |
2337 | mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves); | |
2338 | mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports); | |
2339 | mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports); | |
2340 | mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports); | |
2341 | tdst.igmp_parse_errors += temp.igmp_parse_errors; | |
2342 | ||
2343 | mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries); | |
2344 | mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries); | |
2345 | mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves); | |
2346 | mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports); | |
2347 | mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports); | |
2348 | tdst.mld_parse_errors += temp.mld_parse_errors; | |
2349 | } | |
2350 | memcpy(dest, &tdst, sizeof(*dest)); | |
2351 | } | |
2352 | ||
2353 | int br_mdb_hash_init(struct net_bridge *br) | |
2354 | { | |
2355 | return rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params); | |
2356 | } | |
2357 | ||
2358 | void br_mdb_hash_fini(struct net_bridge *br) | |
2359 | { | |
2360 | rhashtable_destroy(&br->mdb_hash_tbl); | |
2361 | } |