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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> | |
4b3087c7 | 17 | #include <linux/in.h> |
eb1d1641 HX |
18 | #include <linux/jhash.h> |
19 | #include <linux/kernel.h> | |
b195167f | 20 | #include <linux/log2.h> |
eb1d1641 HX |
21 | #include <linux/netdevice.h> |
22 | #include <linux/netfilter_bridge.h> | |
23 | #include <linux/random.h> | |
24 | #include <linux/rculist.h> | |
25 | #include <linux/skbuff.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/timer.h> | |
1c8ad5bf | 28 | #include <linux/inetdevice.h> |
91b02d3d | 29 | #include <linux/mroute.h> |
eb1d1641 | 30 | #include <net/ip.h> |
147c1e9b | 31 | #include <net/switchdev.h> |
dfd56b8b | 32 | #if IS_ENABLED(CONFIG_IPV6) |
4b3087c7 | 33 | #include <linux/icmpv6.h> |
08b202b6 YH |
34 | #include <net/ipv6.h> |
35 | #include <net/mld.h> | |
d4c4f07d | 36 | #include <net/ip6_checksum.h> |
3c3769e6 | 37 | #include <net/addrconf.h> |
08b202b6 | 38 | #endif |
eb1d1641 HX |
39 | |
40 | #include "br_private.h" | |
41 | ||
19e3a9c9 NA |
42 | static const struct rhashtable_params br_mdb_rht_params = { |
43 | .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode), | |
44 | .key_offset = offsetof(struct net_bridge_mdb_entry, addr), | |
45 | .key_len = sizeof(struct br_ip), | |
46 | .automatic_shrinking = true, | |
47 | .locks_mul = 1, | |
48 | }; | |
49 | ||
cc0fdd80 | 50 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 51 | struct bridge_mcast_own_query *query); |
754bc547 SA |
52 | static void br_multicast_add_router(struct net_bridge *br, |
53 | struct net_bridge_port *port); | |
bc8c20ac SA |
54 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
55 | struct net_bridge_port *port, | |
56 | __be32 group, | |
6db6f0ea FF |
57 | __u16 vid, |
58 | const unsigned char *src); | |
59 | ||
f12e7d95 | 60 | static void __del_port_router(struct net_bridge_port *p); |
bc8c20ac SA |
61 | #if IS_ENABLED(CONFIG_IPV6) |
62 | static void br_ip6_multicast_leave_group(struct net_bridge *br, | |
63 | struct net_bridge_port *port, | |
64 | const struct in6_addr *group, | |
6db6f0ea | 65 | __u16 vid, const unsigned char *src); |
bc8c20ac | 66 | #endif |
c83b8fab | 67 | |
8ef2a9a5 YH |
68 | static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b) |
69 | { | |
70 | if (a->proto != b->proto) | |
71 | return 0; | |
b0e9a30d VY |
72 | if (a->vid != b->vid) |
73 | return 0; | |
8ef2a9a5 YH |
74 | switch (a->proto) { |
75 | case htons(ETH_P_IP): | |
76 | return a->u.ip4 == b->u.ip4; | |
dfd56b8b | 77 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
78 | case htons(ETH_P_IPV6): |
79 | return ipv6_addr_equal(&a->u.ip6, &b->u.ip6); | |
80 | #endif | |
8ef2a9a5 YH |
81 | } |
82 | return 0; | |
83 | } | |
84 | ||
19e3a9c9 NA |
85 | static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br, |
86 | struct br_ip *dst) | |
08b202b6 | 87 | { |
19e3a9c9 | 88 | return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params); |
08b202b6 | 89 | } |
08b202b6 | 90 | |
19e3a9c9 NA |
91 | struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br, |
92 | struct br_ip *dst) | |
eb1d1641 | 93 | { |
19e3a9c9 | 94 | struct net_bridge_mdb_entry *ent; |
eb1d1641 | 95 | |
19e3a9c9 | 96 | lockdep_assert_held_once(&br->multicast_lock); |
eb1d1641 | 97 | |
19e3a9c9 NA |
98 | rcu_read_lock(); |
99 | ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params); | |
100 | rcu_read_unlock(); | |
7f285fa7 | 101 | |
19e3a9c9 | 102 | return ent; |
7f285fa7 HX |
103 | } |
104 | ||
19e3a9c9 NA |
105 | static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br, |
106 | __be32 dst, __u16 vid) | |
eb1d1641 | 107 | { |
8ef2a9a5 YH |
108 | struct br_ip br_dst; |
109 | ||
19e3a9c9 | 110 | memset(&br_dst, 0, sizeof(br_dst)); |
8ef2a9a5 YH |
111 | br_dst.u.ip4 = dst; |
112 | br_dst.proto = htons(ETH_P_IP); | |
b0e9a30d | 113 | br_dst.vid = vid; |
0821ec55 | 114 | |
19e3a9c9 | 115 | return br_mdb_ip_get(br, &br_dst); |
8ef2a9a5 YH |
116 | } |
117 | ||
dfd56b8b | 118 | #if IS_ENABLED(CONFIG_IPV6) |
19e3a9c9 NA |
119 | static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br, |
120 | const struct in6_addr *dst, | |
121 | __u16 vid) | |
08b202b6 YH |
122 | { |
123 | struct br_ip br_dst; | |
0821ec55 | 124 | |
19e3a9c9 | 125 | memset(&br_dst, 0, sizeof(br_dst)); |
4e3fd7a0 | 126 | br_dst.u.ip6 = *dst; |
08b202b6 | 127 | br_dst.proto = htons(ETH_P_IPV6); |
b0e9a30d | 128 | br_dst.vid = vid; |
08b202b6 | 129 | |
19e3a9c9 | 130 | return br_mdb_ip_get(br, &br_dst); |
08b202b6 YH |
131 | } |
132 | #endif | |
133 | ||
eb1d1641 | 134 | struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, |
fbca58a2 | 135 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 136 | { |
8ef2a9a5 YH |
137 | struct br_ip ip; |
138 | ||
13cefad2 | 139 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
140 | return NULL; |
141 | ||
8ef2a9a5 | 142 | if (BR_INPUT_SKB_CB(skb)->igmp) |
eb1d1641 HX |
143 | return NULL; |
144 | ||
19e3a9c9 | 145 | memset(&ip, 0, sizeof(ip)); |
8ef2a9a5 | 146 | ip.proto = skb->protocol; |
fbca58a2 | 147 | ip.vid = vid; |
8ef2a9a5 | 148 | |
eb1d1641 HX |
149 | switch (skb->protocol) { |
150 | case htons(ETH_P_IP): | |
8ef2a9a5 YH |
151 | ip.u.ip4 = ip_hdr(skb)->daddr; |
152 | break; | |
dfd56b8b | 153 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 154 | case htons(ETH_P_IPV6): |
4e3fd7a0 | 155 | ip.u.ip6 = ipv6_hdr(skb)->daddr; |
08b202b6 YH |
156 | break; |
157 | #endif | |
8ef2a9a5 YH |
158 | default: |
159 | return NULL; | |
eb1d1641 HX |
160 | } |
161 | ||
19e3a9c9 | 162 | return br_mdb_ip_get_rcu(br, &ip); |
eb1d1641 HX |
163 | } |
164 | ||
88c1f37f | 165 | static void br_multicast_group_expired(struct timer_list *t) |
eb1d1641 | 166 | { |
88c1f37f | 167 | struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer); |
eb1d1641 | 168 | struct net_bridge *br = mp->br; |
eb1d1641 HX |
169 | |
170 | spin_lock(&br->multicast_lock); | |
171 | if (!netif_running(br->dev) || timer_pending(&mp->timer)) | |
172 | goto out; | |
173 | ||
ff0fd34e | 174 | mp->host_joined = false; |
2a26028d | 175 | br_mdb_notify(br->dev, NULL, &mp->addr, RTM_DELMDB, 0); |
eb1d1641 HX |
176 | |
177 | if (mp->ports) | |
178 | goto out; | |
179 | ||
19e3a9c9 NA |
180 | rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode, |
181 | br_mdb_rht_params); | |
182 | hlist_del_rcu(&mp->mdb_node); | |
eb1d1641 | 183 | |
4329596c | 184 | kfree_rcu(mp, rcu); |
eb1d1641 HX |
185 | |
186 | out: | |
187 | spin_unlock(&br->multicast_lock); | |
188 | } | |
189 | ||
190 | static void br_multicast_del_pg(struct net_bridge *br, | |
191 | struct net_bridge_port_group *pg) | |
192 | { | |
eb1d1641 HX |
193 | struct net_bridge_mdb_entry *mp; |
194 | struct net_bridge_port_group *p; | |
e8051688 ED |
195 | struct net_bridge_port_group __rcu **pp; |
196 | ||
19e3a9c9 | 197 | mp = br_mdb_ip_get(br, &pg->addr); |
eb1d1641 HX |
198 | if (WARN_ON(!mp)) |
199 | return; | |
200 | ||
e8051688 ED |
201 | for (pp = &mp->ports; |
202 | (p = mlock_dereference(*pp, br)) != NULL; | |
203 | pp = &p->next) { | |
eb1d1641 HX |
204 | if (p != pg) |
205 | continue; | |
206 | ||
83f6a740 | 207 | rcu_assign_pointer(*pp, p->next); |
eb1d1641 HX |
208 | hlist_del_init(&p->mglist); |
209 | del_timer(&p->timer); | |
45ebcce5 ER |
210 | br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB, |
211 | p->flags); | |
4329596c | 212 | kfree_rcu(p, rcu); |
eb1d1641 | 213 | |
ff0fd34e | 214 | if (!mp->ports && !mp->host_joined && |
eb1d1641 HX |
215 | netif_running(br->dev)) |
216 | mod_timer(&mp->timer, jiffies); | |
217 | ||
218 | return; | |
219 | } | |
220 | ||
221 | WARN_ON(1); | |
222 | } | |
223 | ||
88c1f37f | 224 | static void br_multicast_port_group_expired(struct timer_list *t) |
eb1d1641 | 225 | { |
88c1f37f | 226 | struct net_bridge_port_group *pg = from_timer(pg, t, timer); |
eb1d1641 HX |
227 | struct net_bridge *br = pg->port->br; |
228 | ||
229 | spin_lock(&br->multicast_lock); | |
230 | if (!netif_running(br->dev) || timer_pending(&pg->timer) || | |
9d06b6d8 | 231 | hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT) |
eb1d1641 HX |
232 | goto out; |
233 | ||
234 | br_multicast_del_pg(br, pg); | |
235 | ||
236 | out: | |
237 | spin_unlock(&br->multicast_lock); | |
238 | } | |
239 | ||
8ef2a9a5 | 240 | static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
241 | __be32 group, |
242 | u8 *igmp_type) | |
eb1d1641 | 243 | { |
5e923585 NA |
244 | struct igmpv3_query *ihv3; |
245 | size_t igmp_hdr_size; | |
eb1d1641 HX |
246 | struct sk_buff *skb; |
247 | struct igmphdr *ih; | |
248 | struct ethhdr *eth; | |
249 | struct iphdr *iph; | |
250 | ||
5e923585 NA |
251 | igmp_hdr_size = sizeof(*ih); |
252 | if (br->multicast_igmp_version == 3) | |
253 | igmp_hdr_size = sizeof(*ihv3); | |
eb1d1641 | 254 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) + |
5e923585 | 255 | igmp_hdr_size + 4); |
eb1d1641 HX |
256 | if (!skb) |
257 | goto out; | |
258 | ||
259 | skb->protocol = htons(ETH_P_IP); | |
260 | ||
261 | skb_reset_mac_header(skb); | |
262 | eth = eth_hdr(skb); | |
263 | ||
e5a727f6 | 264 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
eb1d1641 HX |
265 | eth->h_dest[0] = 1; |
266 | eth->h_dest[1] = 0; | |
267 | eth->h_dest[2] = 0x5e; | |
268 | eth->h_dest[3] = 0; | |
269 | eth->h_dest[4] = 0; | |
270 | eth->h_dest[5] = 1; | |
271 | eth->h_proto = htons(ETH_P_IP); | |
272 | skb_put(skb, sizeof(*eth)); | |
273 | ||
274 | skb_set_network_header(skb, skb->len); | |
275 | iph = ip_hdr(skb); | |
276 | ||
277 | iph->version = 4; | |
278 | iph->ihl = 6; | |
279 | iph->tos = 0xc0; | |
5e923585 | 280 | iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4); |
eb1d1641 HX |
281 | iph->id = 0; |
282 | iph->frag_off = htons(IP_DF); | |
283 | iph->ttl = 1; | |
284 | iph->protocol = IPPROTO_IGMP; | |
675779ad | 285 | iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ? |
1c8ad5bf | 286 | inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0; |
eb1d1641 HX |
287 | iph->daddr = htonl(INADDR_ALLHOSTS_GROUP); |
288 | ((u8 *)&iph[1])[0] = IPOPT_RA; | |
289 | ((u8 *)&iph[1])[1] = 4; | |
290 | ((u8 *)&iph[1])[2] = 0; | |
291 | ((u8 *)&iph[1])[3] = 0; | |
292 | ip_send_check(iph); | |
293 | skb_put(skb, 24); | |
294 | ||
295 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 296 | *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY; |
eb1d1641 | 297 | |
5e923585 NA |
298 | switch (br->multicast_igmp_version) { |
299 | case 2: | |
300 | ih = igmp_hdr(skb); | |
301 | ih->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
302 | ih->code = (group ? br->multicast_last_member_interval : | |
303 | br->multicast_query_response_interval) / | |
304 | (HZ / IGMP_TIMER_SCALE); | |
305 | ih->group = group; | |
306 | ih->csum = 0; | |
307 | ih->csum = ip_compute_csum((void *)ih, sizeof(*ih)); | |
308 | break; | |
309 | case 3: | |
310 | ihv3 = igmpv3_query_hdr(skb); | |
311 | ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
312 | ihv3->code = (group ? br->multicast_last_member_interval : | |
313 | br->multicast_query_response_interval) / | |
314 | (HZ / IGMP_TIMER_SCALE); | |
315 | ihv3->group = group; | |
316 | ihv3->qqic = br->multicast_query_interval / HZ; | |
317 | ihv3->nsrcs = 0; | |
318 | ihv3->resv = 0; | |
319 | ihv3->suppress = 0; | |
320 | ihv3->qrv = 2; | |
321 | ihv3->csum = 0; | |
322 | ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3)); | |
323 | break; | |
324 | } | |
325 | ||
326 | skb_put(skb, igmp_hdr_size); | |
eb1d1641 HX |
327 | __skb_pull(skb, sizeof(*eth)); |
328 | ||
329 | out: | |
330 | return skb; | |
331 | } | |
332 | ||
dfd56b8b | 333 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 334 | static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
335 | const struct in6_addr *grp, |
336 | u8 *igmp_type) | |
08b202b6 | 337 | { |
aa2ae3e7 NA |
338 | struct mld2_query *mld2q; |
339 | unsigned long interval; | |
08b202b6 YH |
340 | struct ipv6hdr *ip6h; |
341 | struct mld_msg *mldq; | |
aa2ae3e7 NA |
342 | size_t mld_hdr_size; |
343 | struct sk_buff *skb; | |
08b202b6 YH |
344 | struct ethhdr *eth; |
345 | u8 *hopopt; | |
08b202b6 | 346 | |
aa2ae3e7 NA |
347 | mld_hdr_size = sizeof(*mldq); |
348 | if (br->multicast_mld_version == 2) | |
349 | mld_hdr_size = sizeof(*mld2q); | |
08b202b6 | 350 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) + |
aa2ae3e7 | 351 | 8 + mld_hdr_size); |
08b202b6 YH |
352 | if (!skb) |
353 | goto out; | |
354 | ||
355 | skb->protocol = htons(ETH_P_IPV6); | |
356 | ||
357 | /* Ethernet header */ | |
358 | skb_reset_mac_header(skb); | |
359 | eth = eth_hdr(skb); | |
360 | ||
e5a727f6 | 361 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
08b202b6 YH |
362 | eth->h_proto = htons(ETH_P_IPV6); |
363 | skb_put(skb, sizeof(*eth)); | |
364 | ||
365 | /* IPv6 header + HbH option */ | |
366 | skb_set_network_header(skb, skb->len); | |
367 | ip6h = ipv6_hdr(skb); | |
368 | ||
369 | *(__force __be32 *)ip6h = htonl(0x60000000); | |
aa2ae3e7 | 370 | ip6h->payload_len = htons(8 + mld_hdr_size); |
08b202b6 YH |
371 | ip6h->nexthdr = IPPROTO_HOPOPTS; |
372 | ip6h->hop_limit = 1; | |
a7bff75b | 373 | ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1)); |
d1d81d4c UW |
374 | if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, |
375 | &ip6h->saddr)) { | |
376 | kfree_skb(skb); | |
675779ad | 377 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false); |
d1d81d4c UW |
378 | return NULL; |
379 | } | |
0888d5f3 | 380 | |
675779ad | 381 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); |
36cff5a1 | 382 | ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); |
08b202b6 YH |
383 | |
384 | hopopt = (u8 *)(ip6h + 1); | |
385 | hopopt[0] = IPPROTO_ICMPV6; /* next hdr */ | |
386 | hopopt[1] = 0; /* length of HbH */ | |
387 | hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */ | |
388 | hopopt[3] = 2; /* Length of RA Option */ | |
389 | hopopt[4] = 0; /* Type = 0x0000 (MLD) */ | |
390 | hopopt[5] = 0; | |
1de5a71c EZ |
391 | hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */ |
392 | hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */ | |
08b202b6 YH |
393 | |
394 | skb_put(skb, sizeof(*ip6h) + 8); | |
395 | ||
396 | /* ICMPv6 */ | |
397 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 398 | interval = ipv6_addr_any(grp) ? |
32de868c LL |
399 | br->multicast_query_response_interval : |
400 | br->multicast_last_member_interval; | |
1080ab95 | 401 | *igmp_type = ICMPV6_MGM_QUERY; |
aa2ae3e7 NA |
402 | switch (br->multicast_mld_version) { |
403 | case 1: | |
404 | mldq = (struct mld_msg *)icmp6_hdr(skb); | |
405 | mldq->mld_type = ICMPV6_MGM_QUERY; | |
406 | mldq->mld_code = 0; | |
407 | mldq->mld_cksum = 0; | |
408 | mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval)); | |
409 | mldq->mld_reserved = 0; | |
410 | mldq->mld_mca = *grp; | |
411 | mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
412 | sizeof(*mldq), IPPROTO_ICMPV6, | |
413 | csum_partial(mldq, | |
414 | sizeof(*mldq), | |
415 | 0)); | |
416 | break; | |
417 | case 2: | |
418 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
53631a5f | 419 | mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval)); |
aa2ae3e7 NA |
420 | mld2q->mld2q_type = ICMPV6_MGM_QUERY; |
421 | mld2q->mld2q_code = 0; | |
422 | mld2q->mld2q_cksum = 0; | |
423 | mld2q->mld2q_resv1 = 0; | |
424 | mld2q->mld2q_resv2 = 0; | |
425 | mld2q->mld2q_suppress = 0; | |
426 | mld2q->mld2q_qrv = 2; | |
427 | mld2q->mld2q_nsrcs = 0; | |
428 | mld2q->mld2q_qqic = br->multicast_query_interval / HZ; | |
429 | mld2q->mld2q_mca = *grp; | |
430 | mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
431 | sizeof(*mld2q), | |
432 | IPPROTO_ICMPV6, | |
433 | csum_partial(mld2q, | |
434 | sizeof(*mld2q), | |
435 | 0)); | |
436 | break; | |
437 | } | |
438 | skb_put(skb, mld_hdr_size); | |
08b202b6 YH |
439 | |
440 | __skb_pull(skb, sizeof(*eth)); | |
441 | ||
442 | out: | |
443 | return skb; | |
444 | } | |
445 | #endif | |
446 | ||
8ef2a9a5 | 447 | static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
448 | struct br_ip *addr, |
449 | u8 *igmp_type) | |
8ef2a9a5 YH |
450 | { |
451 | switch (addr->proto) { | |
452 | case htons(ETH_P_IP): | |
1080ab95 | 453 | return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type); |
dfd56b8b | 454 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 455 | case htons(ETH_P_IPV6): |
1080ab95 NA |
456 | return br_ip6_multicast_alloc_query(br, &addr->u.ip6, |
457 | igmp_type); | |
08b202b6 | 458 | #endif |
8ef2a9a5 YH |
459 | } |
460 | return NULL; | |
461 | } | |
462 | ||
cfd56754 | 463 | struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, |
5e923585 | 464 | struct br_ip *group) |
eb1d1641 | 465 | { |
eb1d1641 | 466 | struct net_bridge_mdb_entry *mp; |
4c0833bc | 467 | int err; |
eb1d1641 | 468 | |
19e3a9c9 NA |
469 | mp = br_mdb_ip_get(br, group); |
470 | if (mp) | |
471 | return mp; | |
eb1d1641 | 472 | |
19e3a9c9 NA |
473 | if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) { |
474 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false); | |
475 | return ERR_PTR(-E2BIG); | |
eb1d1641 HX |
476 | } |
477 | ||
478 | mp = kzalloc(sizeof(*mp), GFP_ATOMIC); | |
479 | if (unlikely(!mp)) | |
4c0833bc | 480 | return ERR_PTR(-ENOMEM); |
eb1d1641 HX |
481 | |
482 | mp->br = br; | |
8ef2a9a5 | 483 | mp->addr = *group; |
88c1f37f | 484 | timer_setup(&mp->timer, br_multicast_group_expired, 0); |
19e3a9c9 NA |
485 | err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode, |
486 | br_mdb_rht_params); | |
487 | if (err) { | |
488 | kfree(mp); | |
489 | mp = ERR_PTR(err); | |
490 | } else { | |
491 | hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list); | |
492 | } | |
1faabf2a | 493 | |
eb1d1641 HX |
494 | return mp; |
495 | } | |
496 | ||
cfd56754 CW |
497 | struct net_bridge_port_group *br_multicast_new_port_group( |
498 | struct net_bridge_port *port, | |
499 | struct br_ip *group, | |
ccb1c31a | 500 | struct net_bridge_port_group __rcu *next, |
6db6f0ea FF |
501 | unsigned char flags, |
502 | const unsigned char *src) | |
cfd56754 CW |
503 | { |
504 | struct net_bridge_port_group *p; | |
505 | ||
506 | p = kzalloc(sizeof(*p), GFP_ATOMIC); | |
507 | if (unlikely(!p)) | |
508 | return NULL; | |
509 | ||
510 | p->addr = *group; | |
511 | p->port = port; | |
9d06b6d8 | 512 | p->flags = flags; |
eca2a43b | 513 | rcu_assign_pointer(p->next, next); |
cfd56754 | 514 | hlist_add_head(&p->mglist, &port->mglist); |
88c1f37f | 515 | timer_setup(&p->timer, br_multicast_port_group_expired, 0); |
6db6f0ea FF |
516 | |
517 | if (src) | |
518 | memcpy(p->eth_addr, src, ETH_ALEN); | |
519 | else | |
520 | memset(p->eth_addr, 0xff, ETH_ALEN); | |
521 | ||
cfd56754 CW |
522 | return p; |
523 | } | |
524 | ||
6db6f0ea FF |
525 | static bool br_port_group_equal(struct net_bridge_port_group *p, |
526 | struct net_bridge_port *port, | |
527 | const unsigned char *src) | |
528 | { | |
529 | if (p->port != port) | |
530 | return false; | |
531 | ||
532 | if (!(port->flags & BR_MULTICAST_TO_UNICAST)) | |
533 | return true; | |
534 | ||
535 | return ether_addr_equal(src, p->eth_addr); | |
536 | } | |
537 | ||
eb1d1641 | 538 | static int br_multicast_add_group(struct net_bridge *br, |
8ef2a9a5 | 539 | struct net_bridge_port *port, |
6db6f0ea FF |
540 | struct br_ip *group, |
541 | const unsigned char *src) | |
eb1d1641 | 542 | { |
e8051688 | 543 | struct net_bridge_port_group __rcu **pp; |
5e923585 NA |
544 | struct net_bridge_port_group *p; |
545 | struct net_bridge_mdb_entry *mp; | |
454594f3 | 546 | unsigned long now = jiffies; |
eb1d1641 HX |
547 | int err; |
548 | ||
eb1d1641 HX |
549 | spin_lock(&br->multicast_lock); |
550 | if (!netif_running(br->dev) || | |
551 | (port && port->state == BR_STATE_DISABLED)) | |
552 | goto out; | |
553 | ||
19e3a9c9 | 554 | mp = br_multicast_new_group(br, group); |
eb1d1641 | 555 | err = PTR_ERR(mp); |
4c0833bc | 556 | if (IS_ERR(mp)) |
eb1d1641 HX |
557 | goto err; |
558 | ||
559 | if (!port) { | |
2a26028d AL |
560 | if (!mp->host_joined) { |
561 | mp->host_joined = true; | |
562 | br_mdb_notify(br->dev, NULL, &mp->addr, RTM_NEWMDB, 0); | |
563 | } | |
454594f3 | 564 | mod_timer(&mp->timer, now + br->multicast_membership_interval); |
eb1d1641 HX |
565 | goto out; |
566 | } | |
567 | ||
e8051688 ED |
568 | for (pp = &mp->ports; |
569 | (p = mlock_dereference(*pp, br)) != NULL; | |
570 | pp = &p->next) { | |
6db6f0ea | 571 | if (br_port_group_equal(p, port, src)) |
454594f3 | 572 | goto found; |
eb1d1641 HX |
573 | if ((unsigned long)p->port < (unsigned long)port) |
574 | break; | |
575 | } | |
576 | ||
6db6f0ea | 577 | p = br_multicast_new_port_group(port, group, *pp, 0, src); |
eb1d1641 HX |
578 | if (unlikely(!p)) |
579 | goto err; | |
eb1d1641 | 580 | rcu_assign_pointer(*pp, p); |
45ebcce5 | 581 | br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0); |
eb1d1641 | 582 | |
454594f3 LL |
583 | found: |
584 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
eb1d1641 HX |
585 | out: |
586 | err = 0; | |
587 | ||
588 | err: | |
589 | spin_unlock(&br->multicast_lock); | |
590 | return err; | |
591 | } | |
592 | ||
8ef2a9a5 YH |
593 | static int br_ip4_multicast_add_group(struct net_bridge *br, |
594 | struct net_bridge_port *port, | |
b0e9a30d | 595 | __be32 group, |
6db6f0ea FF |
596 | __u16 vid, |
597 | const unsigned char *src) | |
8ef2a9a5 YH |
598 | { |
599 | struct br_ip br_group; | |
600 | ||
601 | if (ipv4_is_local_multicast(group)) | |
602 | return 0; | |
603 | ||
1515a63f | 604 | memset(&br_group, 0, sizeof(br_group)); |
8ef2a9a5 YH |
605 | br_group.u.ip4 = group; |
606 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 607 | br_group.vid = vid; |
8ef2a9a5 | 608 | |
6db6f0ea | 609 | return br_multicast_add_group(br, port, &br_group, src); |
8ef2a9a5 YH |
610 | } |
611 | ||
dfd56b8b | 612 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
613 | static int br_ip6_multicast_add_group(struct net_bridge *br, |
614 | struct net_bridge_port *port, | |
b0e9a30d | 615 | const struct in6_addr *group, |
6db6f0ea FF |
616 | __u16 vid, |
617 | const unsigned char *src) | |
08b202b6 YH |
618 | { |
619 | struct br_ip br_group; | |
620 | ||
3c3769e6 | 621 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
622 | return 0; |
623 | ||
19e3a9c9 | 624 | memset(&br_group, 0, sizeof(br_group)); |
4e3fd7a0 | 625 | br_group.u.ip6 = *group; |
9cc6e0c4 | 626 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 627 | br_group.vid = vid; |
08b202b6 | 628 | |
6db6f0ea | 629 | return br_multicast_add_group(br, port, &br_group, src); |
08b202b6 YH |
630 | } |
631 | #endif | |
632 | ||
88c1f37f | 633 | static void br_multicast_router_expired(struct timer_list *t) |
eb1d1641 | 634 | { |
88c1f37f AP |
635 | struct net_bridge_port *port = |
636 | from_timer(port, t, multicast_router_timer); | |
eb1d1641 HX |
637 | struct net_bridge *br = port->br; |
638 | ||
639 | spin_lock(&br->multicast_lock); | |
a55d8246 NA |
640 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
641 | port->multicast_router == MDB_RTR_TYPE_PERM || | |
f12e7d95 | 642 | timer_pending(&port->multicast_router_timer)) |
eb1d1641 HX |
643 | goto out; |
644 | ||
f12e7d95 | 645 | __del_port_router(port); |
eb1d1641 HX |
646 | out: |
647 | spin_unlock(&br->multicast_lock); | |
648 | } | |
649 | ||
77041420 YG |
650 | static void br_mc_router_state_change(struct net_bridge *p, |
651 | bool is_mc_router) | |
652 | { | |
653 | struct switchdev_attr attr = { | |
654 | .orig_dev = p->dev, | |
655 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER, | |
656 | .flags = SWITCHDEV_F_DEFER, | |
657 | .u.mrouter = is_mc_router, | |
658 | }; | |
659 | ||
660 | switchdev_port_attr_set(p->dev, &attr); | |
661 | } | |
662 | ||
88c1f37f | 663 | static void br_multicast_local_router_expired(struct timer_list *t) |
eb1d1641 | 664 | { |
88c1f37f | 665 | struct net_bridge *br = from_timer(br, t, multicast_router_timer); |
77041420 YG |
666 | |
667 | spin_lock(&br->multicast_lock); | |
668 | if (br->multicast_router == MDB_RTR_TYPE_DISABLED || | |
669 | br->multicast_router == MDB_RTR_TYPE_PERM || | |
670 | timer_pending(&br->multicast_router_timer)) | |
671 | goto out; | |
672 | ||
673 | br_mc_router_state_change(br, false); | |
674 | out: | |
675 | spin_unlock(&br->multicast_lock); | |
eb1d1641 HX |
676 | } |
677 | ||
cc0fdd80 | 678 | static void br_multicast_querier_expired(struct net_bridge *br, |
90010b36 | 679 | struct bridge_mcast_own_query *query) |
c83b8fab | 680 | { |
c83b8fab | 681 | spin_lock(&br->multicast_lock); |
13cefad2 | 682 | if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
c83b8fab HX |
683 | goto out; |
684 | ||
cc0fdd80 | 685 | br_multicast_start_querier(br, query); |
c83b8fab HX |
686 | |
687 | out: | |
688 | spin_unlock(&br->multicast_lock); | |
689 | } | |
690 | ||
88c1f37f | 691 | static void br_ip4_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 692 | { |
88c1f37f | 693 | struct net_bridge *br = from_timer(br, t, ip4_other_query.timer); |
cc0fdd80 | 694 | |
90010b36 | 695 | br_multicast_querier_expired(br, &br->ip4_own_query); |
cc0fdd80 LL |
696 | } |
697 | ||
698 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 699 | static void br_ip6_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 700 | { |
88c1f37f | 701 | struct net_bridge *br = from_timer(br, t, ip6_other_query.timer); |
cc0fdd80 | 702 | |
90010b36 | 703 | br_multicast_querier_expired(br, &br->ip6_own_query); |
cc0fdd80 LL |
704 | } |
705 | #endif | |
706 | ||
dc4eb53a LL |
707 | static void br_multicast_select_own_querier(struct net_bridge *br, |
708 | struct br_ip *ip, | |
709 | struct sk_buff *skb) | |
710 | { | |
711 | if (ip->proto == htons(ETH_P_IP)) | |
712 | br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr; | |
713 | #if IS_ENABLED(CONFIG_IPV6) | |
714 | else | |
715 | br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr; | |
716 | #endif | |
717 | } | |
718 | ||
8ef2a9a5 YH |
719 | static void __br_multicast_send_query(struct net_bridge *br, |
720 | struct net_bridge_port *port, | |
721 | struct br_ip *ip) | |
eb1d1641 | 722 | { |
eb1d1641 | 723 | struct sk_buff *skb; |
1080ab95 | 724 | u8 igmp_type; |
eb1d1641 | 725 | |
1080ab95 | 726 | skb = br_multicast_alloc_query(br, ip, &igmp_type); |
eb1d1641 | 727 | if (!skb) |
8ef2a9a5 | 728 | return; |
eb1d1641 HX |
729 | |
730 | if (port) { | |
eb1d1641 | 731 | skb->dev = port->dev; |
a65056ec | 732 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 733 | BR_MCAST_DIR_TX); |
29a26a56 EB |
734 | NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, |
735 | dev_net(port->dev), NULL, skb, NULL, skb->dev, | |
f0b4eece | 736 | br_dev_queue_push_xmit); |
dc4eb53a LL |
737 | } else { |
738 | br_multicast_select_own_querier(br, ip, skb); | |
a65056ec | 739 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 740 | BR_MCAST_DIR_RX); |
eb1d1641 | 741 | netif_rx(skb); |
dc4eb53a | 742 | } |
8ef2a9a5 YH |
743 | } |
744 | ||
745 | static void br_multicast_send_query(struct net_bridge *br, | |
cc0fdd80 | 746 | struct net_bridge_port *port, |
90010b36 | 747 | struct bridge_mcast_own_query *own_query) |
8ef2a9a5 | 748 | { |
90010b36 | 749 | struct bridge_mcast_other_query *other_query = NULL; |
5e923585 NA |
750 | struct br_ip br_group; |
751 | unsigned long time; | |
8ef2a9a5 | 752 | |
13cefad2 NA |
753 | if (!netif_running(br->dev) || |
754 | !br_opt_get(br, BROPT_MULTICAST_ENABLED) || | |
675779ad | 755 | !br_opt_get(br, BROPT_MULTICAST_QUERIER)) |
8ef2a9a5 YH |
756 | return; |
757 | ||
08b202b6 YH |
758 | memset(&br_group.u, 0, sizeof(br_group.u)); |
759 | ||
90010b36 LL |
760 | if (port ? (own_query == &port->ip4_own_query) : |
761 | (own_query == &br->ip4_own_query)) { | |
762 | other_query = &br->ip4_other_query; | |
cc0fdd80 | 763 | br_group.proto = htons(ETH_P_IP); |
dfd56b8b | 764 | #if IS_ENABLED(CONFIG_IPV6) |
cc0fdd80 | 765 | } else { |
90010b36 | 766 | other_query = &br->ip6_other_query; |
cc0fdd80 | 767 | br_group.proto = htons(ETH_P_IPV6); |
08b202b6 | 768 | #endif |
cc0fdd80 LL |
769 | } |
770 | ||
90010b36 | 771 | if (!other_query || timer_pending(&other_query->timer)) |
cc0fdd80 LL |
772 | return; |
773 | ||
774 | __br_multicast_send_query(br, port, &br_group); | |
eb1d1641 | 775 | |
eb1d1641 | 776 | time = jiffies; |
90010b36 | 777 | time += own_query->startup_sent < br->multicast_startup_query_count ? |
eb1d1641 HX |
778 | br->multicast_startup_query_interval : |
779 | br->multicast_query_interval; | |
90010b36 | 780 | mod_timer(&own_query->timer, time); |
eb1d1641 HX |
781 | } |
782 | ||
90010b36 LL |
783 | static void |
784 | br_multicast_port_query_expired(struct net_bridge_port *port, | |
785 | struct bridge_mcast_own_query *query) | |
eb1d1641 | 786 | { |
eb1d1641 HX |
787 | struct net_bridge *br = port->br; |
788 | ||
789 | spin_lock(&br->multicast_lock); | |
02a780c0 DC |
790 | if (port->state == BR_STATE_DISABLED || |
791 | port->state == BR_STATE_BLOCKING) | |
eb1d1641 HX |
792 | goto out; |
793 | ||
cc0fdd80 LL |
794 | if (query->startup_sent < br->multicast_startup_query_count) |
795 | query->startup_sent++; | |
eb1d1641 | 796 | |
cc0fdd80 | 797 | br_multicast_send_query(port->br, port, query); |
eb1d1641 HX |
798 | |
799 | out: | |
800 | spin_unlock(&br->multicast_lock); | |
801 | } | |
802 | ||
88c1f37f | 803 | static void br_ip4_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 804 | { |
88c1f37f | 805 | struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer); |
cc0fdd80 | 806 | |
90010b36 | 807 | br_multicast_port_query_expired(port, &port->ip4_own_query); |
cc0fdd80 LL |
808 | } |
809 | ||
810 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 811 | static void br_ip6_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 812 | { |
88c1f37f | 813 | struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer); |
cc0fdd80 | 814 | |
90010b36 | 815 | br_multicast_port_query_expired(port, &port->ip6_own_query); |
cc0fdd80 LL |
816 | } |
817 | #endif | |
818 | ||
147c1e9b NF |
819 | static void br_mc_disabled_update(struct net_device *dev, bool value) |
820 | { | |
821 | struct switchdev_attr attr = { | |
822 | .orig_dev = dev, | |
823 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED, | |
824 | .flags = SWITCHDEV_F_DEFER, | |
13cefad2 | 825 | .u.mc_disabled = !value, |
147c1e9b NF |
826 | }; |
827 | ||
828 | switchdev_port_attr_set(dev, &attr); | |
829 | } | |
830 | ||
1080ab95 | 831 | int br_multicast_add_port(struct net_bridge_port *port) |
eb1d1641 | 832 | { |
7f0aec7a | 833 | port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
eb1d1641 | 834 | |
88c1f37f AP |
835 | timer_setup(&port->multicast_router_timer, |
836 | br_multicast_router_expired, 0); | |
837 | timer_setup(&port->ip4_own_query.timer, | |
838 | br_ip4_multicast_port_query_expired, 0); | |
cc0fdd80 | 839 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f AP |
840 | timer_setup(&port->ip6_own_query.timer, |
841 | br_ip6_multicast_port_query_expired, 0); | |
cc0fdd80 | 842 | #endif |
13cefad2 NA |
843 | br_mc_disabled_update(port->dev, |
844 | br_opt_get(port->br, BROPT_MULTICAST_ENABLED)); | |
147c1e9b | 845 | |
1080ab95 NA |
846 | port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); |
847 | if (!port->mcast_stats) | |
848 | return -ENOMEM; | |
849 | ||
850 | return 0; | |
eb1d1641 HX |
851 | } |
852 | ||
853 | void br_multicast_del_port(struct net_bridge_port *port) | |
854 | { | |
e10177ab SA |
855 | struct net_bridge *br = port->br; |
856 | struct net_bridge_port_group *pg; | |
857 | struct hlist_node *n; | |
858 | ||
859 | /* Take care of the remaining groups, only perm ones should be left */ | |
860 | spin_lock_bh(&br->multicast_lock); | |
861 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) | |
862 | br_multicast_del_pg(br, pg); | |
863 | spin_unlock_bh(&br->multicast_lock); | |
eb1d1641 | 864 | del_timer_sync(&port->multicast_router_timer); |
1080ab95 | 865 | free_percpu(port->mcast_stats); |
eb1d1641 HX |
866 | } |
867 | ||
90010b36 | 868 | static void br_multicast_enable(struct bridge_mcast_own_query *query) |
561f1103 | 869 | { |
cc0fdd80 | 870 | query->startup_sent = 0; |
561f1103 | 871 | |
cc0fdd80 LL |
872 | if (try_to_del_timer_sync(&query->timer) >= 0 || |
873 | del_timer(&query->timer)) | |
874 | mod_timer(&query->timer, jiffies); | |
561f1103 HX |
875 | } |
876 | ||
7cb3f921 | 877 | static void __br_multicast_enable_port(struct net_bridge_port *port) |
eb1d1641 HX |
878 | { |
879 | struct net_bridge *br = port->br; | |
880 | ||
13cefad2 | 881 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev)) |
7cb3f921 | 882 | return; |
eb1d1641 | 883 | |
90010b36 | 884 | br_multicast_enable(&port->ip4_own_query); |
cc0fdd80 | 885 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 886 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 887 | #endif |
7f0aec7a NA |
888 | if (port->multicast_router == MDB_RTR_TYPE_PERM && |
889 | hlist_unhashed(&port->rlist)) | |
754bc547 | 890 | br_multicast_add_router(br, port); |
7cb3f921 | 891 | } |
eb1d1641 | 892 | |
7cb3f921 NA |
893 | void br_multicast_enable_port(struct net_bridge_port *port) |
894 | { | |
895 | struct net_bridge *br = port->br; | |
896 | ||
897 | spin_lock(&br->multicast_lock); | |
898 | __br_multicast_enable_port(port); | |
eb1d1641 HX |
899 | spin_unlock(&br->multicast_lock); |
900 | } | |
901 | ||
902 | void br_multicast_disable_port(struct net_bridge_port *port) | |
903 | { | |
904 | struct net_bridge *br = port->br; | |
905 | struct net_bridge_port_group *pg; | |
b67bfe0d | 906 | struct hlist_node *n; |
eb1d1641 HX |
907 | |
908 | spin_lock(&br->multicast_lock); | |
b67bfe0d | 909 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) |
9d06b6d8 | 910 | if (!(pg->flags & MDB_PG_FLAGS_PERMANENT)) |
e10177ab | 911 | br_multicast_del_pg(br, pg); |
eb1d1641 | 912 | |
f12e7d95 NF |
913 | __del_port_router(port); |
914 | ||
eb1d1641 | 915 | del_timer(&port->multicast_router_timer); |
90010b36 | 916 | del_timer(&port->ip4_own_query.timer); |
cc0fdd80 | 917 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 918 | del_timer(&port->ip6_own_query.timer); |
cc0fdd80 | 919 | #endif |
eb1d1641 HX |
920 | spin_unlock(&br->multicast_lock); |
921 | } | |
922 | ||
8ef2a9a5 YH |
923 | static int br_ip4_multicast_igmp3_report(struct net_bridge *br, |
924 | struct net_bridge_port *port, | |
06499098 VY |
925 | struct sk_buff *skb, |
926 | u16 vid) | |
eb1d1641 | 927 | { |
6db6f0ea | 928 | const unsigned char *src; |
eb1d1641 HX |
929 | struct igmpv3_report *ih; |
930 | struct igmpv3_grec *grec; | |
931 | int i; | |
932 | int len; | |
933 | int num; | |
934 | int type; | |
935 | int err = 0; | |
936 | __be32 group; | |
937 | ||
eb1d1641 HX |
938 | ih = igmpv3_report_hdr(skb); |
939 | num = ntohs(ih->ngrec); | |
c2d4fbd2 | 940 | len = skb_transport_offset(skb) + sizeof(*ih); |
eb1d1641 HX |
941 | |
942 | for (i = 0; i < num; i++) { | |
943 | len += sizeof(*grec); | |
ba5ea614 | 944 | if (!ip_mc_may_pull(skb, len)) |
eb1d1641 HX |
945 | return -EINVAL; |
946 | ||
fd218cf9 | 947 | grec = (void *)(skb->data + len - sizeof(*grec)); |
eb1d1641 HX |
948 | group = grec->grec_mca; |
949 | type = grec->grec_type; | |
950 | ||
8eabf95c | 951 | len += ntohs(grec->grec_nsrcs) * 4; |
ba5ea614 | 952 | if (!ip_mc_may_pull(skb, len)) |
eb1d1641 HX |
953 | return -EINVAL; |
954 | ||
955 | /* We treat this as an IGMPv2 report for now. */ | |
956 | switch (type) { | |
957 | case IGMPV3_MODE_IS_INCLUDE: | |
958 | case IGMPV3_MODE_IS_EXCLUDE: | |
959 | case IGMPV3_CHANGE_TO_INCLUDE: | |
960 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
961 | case IGMPV3_ALLOW_NEW_SOURCES: | |
962 | case IGMPV3_BLOCK_OLD_SOURCES: | |
963 | break; | |
964 | ||
965 | default: | |
966 | continue; | |
967 | } | |
968 | ||
6db6f0ea | 969 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
970 | if ((type == IGMPV3_CHANGE_TO_INCLUDE || |
971 | type == IGMPV3_MODE_IS_INCLUDE) && | |
972 | ntohs(grec->grec_nsrcs) == 0) { | |
6db6f0ea | 973 | br_ip4_multicast_leave_group(br, port, group, vid, src); |
bc8c20ac | 974 | } else { |
6db6f0ea FF |
975 | err = br_ip4_multicast_add_group(br, port, group, vid, |
976 | src); | |
bc8c20ac SA |
977 | if (err) |
978 | break; | |
979 | } | |
eb1d1641 HX |
980 | } |
981 | ||
982 | return err; | |
983 | } | |
984 | ||
dfd56b8b | 985 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
986 | static int br_ip6_multicast_mld2_report(struct net_bridge *br, |
987 | struct net_bridge_port *port, | |
06499098 VY |
988 | struct sk_buff *skb, |
989 | u16 vid) | |
08b202b6 | 990 | { |
ba5ea614 | 991 | unsigned int nsrcs_offset; |
6db6f0ea | 992 | const unsigned char *src; |
08b202b6 YH |
993 | struct icmp6hdr *icmp6h; |
994 | struct mld2_grec *grec; | |
ba5ea614 | 995 | unsigned int grec_len; |
08b202b6 YH |
996 | int i; |
997 | int len; | |
998 | int num; | |
999 | int err = 0; | |
1000 | ||
ba5ea614 | 1001 | if (!ipv6_mc_may_pull(skb, sizeof(*icmp6h))) |
08b202b6 YH |
1002 | return -EINVAL; |
1003 | ||
1004 | icmp6h = icmp6_hdr(skb); | |
1005 | num = ntohs(icmp6h->icmp6_dataun.un_data16[1]); | |
c2d4fbd2 | 1006 | len = skb_transport_offset(skb) + sizeof(*icmp6h); |
08b202b6 YH |
1007 | |
1008 | for (i = 0; i < num; i++) { | |
1009 | __be16 *nsrcs, _nsrcs; | |
1010 | ||
ba5ea614 LL |
1011 | nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs); |
1012 | ||
1013 | if (skb_transport_offset(skb) + ipv6_transport_len(skb) < | |
1014 | nsrcs_offset + sizeof(_nsrcs)) | |
1015 | return -EINVAL; | |
1016 | ||
1017 | nsrcs = skb_header_pointer(skb, nsrcs_offset, | |
08b202b6 YH |
1018 | sizeof(_nsrcs), &_nsrcs); |
1019 | if (!nsrcs) | |
1020 | return -EINVAL; | |
1021 | ||
4154b567 | 1022 | grec_len = struct_size(grec, grec_src, ntohs(*nsrcs)); |
ba5ea614 LL |
1023 | |
1024 | if (!ipv6_mc_may_pull(skb, len + grec_len)) | |
08b202b6 YH |
1025 | return -EINVAL; |
1026 | ||
1027 | grec = (struct mld2_grec *)(skb->data + len); | |
ba5ea614 | 1028 | len += grec_len; |
08b202b6 YH |
1029 | |
1030 | /* We treat these as MLDv1 reports for now. */ | |
1031 | switch (grec->grec_type) { | |
1032 | case MLD2_MODE_IS_INCLUDE: | |
1033 | case MLD2_MODE_IS_EXCLUDE: | |
1034 | case MLD2_CHANGE_TO_INCLUDE: | |
1035 | case MLD2_CHANGE_TO_EXCLUDE: | |
1036 | case MLD2_ALLOW_NEW_SOURCES: | |
1037 | case MLD2_BLOCK_OLD_SOURCES: | |
1038 | break; | |
1039 | ||
1040 | default: | |
1041 | continue; | |
1042 | } | |
1043 | ||
6db6f0ea | 1044 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
1045 | if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE || |
1046 | grec->grec_type == MLD2_MODE_IS_INCLUDE) && | |
1047 | ntohs(*nsrcs) == 0) { | |
1048 | br_ip6_multicast_leave_group(br, port, &grec->grec_mca, | |
6db6f0ea | 1049 | vid, src); |
bc8c20ac SA |
1050 | } else { |
1051 | err = br_ip6_multicast_add_group(br, port, | |
6db6f0ea FF |
1052 | &grec->grec_mca, vid, |
1053 | src); | |
9264251e | 1054 | if (err) |
bc8c20ac SA |
1055 | break; |
1056 | } | |
08b202b6 YH |
1057 | } |
1058 | ||
1059 | return err; | |
1060 | } | |
1061 | #endif | |
1062 | ||
dc4eb53a | 1063 | static bool br_ip4_multicast_select_querier(struct net_bridge *br, |
2cd41431 | 1064 | struct net_bridge_port *port, |
dc4eb53a LL |
1065 | __be32 saddr) |
1066 | { | |
1067 | if (!timer_pending(&br->ip4_own_query.timer) && | |
1068 | !timer_pending(&br->ip4_other_query.timer)) | |
1069 | goto update; | |
1070 | ||
1071 | if (!br->ip4_querier.addr.u.ip4) | |
1072 | goto update; | |
1073 | ||
1074 | if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4)) | |
1075 | goto update; | |
1076 | ||
1077 | return false; | |
1078 | ||
1079 | update: | |
1080 | br->ip4_querier.addr.u.ip4 = saddr; | |
1081 | ||
2cd41431 LL |
1082 | /* update protected by general multicast_lock by caller */ |
1083 | rcu_assign_pointer(br->ip4_querier.port, port); | |
1084 | ||
dc4eb53a LL |
1085 | return true; |
1086 | } | |
1087 | ||
1088 | #if IS_ENABLED(CONFIG_IPV6) | |
1089 | static bool br_ip6_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1090 | struct net_bridge_port *port, |
dc4eb53a LL |
1091 | struct in6_addr *saddr) |
1092 | { | |
1093 | if (!timer_pending(&br->ip6_own_query.timer) && | |
1094 | !timer_pending(&br->ip6_other_query.timer)) | |
1095 | goto update; | |
1096 | ||
1097 | if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0) | |
1098 | goto update; | |
1099 | ||
1100 | return false; | |
1101 | ||
1102 | update: | |
1103 | br->ip6_querier.addr.u.ip6 = *saddr; | |
1104 | ||
2cd41431 LL |
1105 | /* update protected by general multicast_lock by caller */ |
1106 | rcu_assign_pointer(br->ip6_querier.port, port); | |
1107 | ||
dc4eb53a LL |
1108 | return true; |
1109 | } | |
1110 | #endif | |
1111 | ||
1112 | static bool br_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1113 | struct net_bridge_port *port, |
dc4eb53a LL |
1114 | struct br_ip *saddr) |
1115 | { | |
1116 | switch (saddr->proto) { | |
1117 | case htons(ETH_P_IP): | |
2cd41431 | 1118 | return br_ip4_multicast_select_querier(br, port, saddr->u.ip4); |
dc4eb53a LL |
1119 | #if IS_ENABLED(CONFIG_IPV6) |
1120 | case htons(ETH_P_IPV6): | |
2cd41431 | 1121 | return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6); |
dc4eb53a LL |
1122 | #endif |
1123 | } | |
1124 | ||
1125 | return false; | |
1126 | } | |
1127 | ||
cc0fdd80 | 1128 | static void |
90010b36 LL |
1129 | br_multicast_update_query_timer(struct net_bridge *br, |
1130 | struct bridge_mcast_other_query *query, | |
1131 | unsigned long max_delay) | |
b00589af | 1132 | { |
90010b36 LL |
1133 | if (!timer_pending(&query->timer)) |
1134 | query->delay_time = jiffies + max_delay; | |
b00589af | 1135 | |
90010b36 | 1136 | mod_timer(&query->timer, jiffies + br->multicast_querier_interval); |
b00589af LL |
1137 | } |
1138 | ||
6d549648 NF |
1139 | static void br_port_mc_router_state_change(struct net_bridge_port *p, |
1140 | bool is_mc_router) | |
1141 | { | |
1142 | struct switchdev_attr attr = { | |
1143 | .orig_dev = p->dev, | |
1144 | .id = SWITCHDEV_ATTR_ID_PORT_MROUTER, | |
1145 | .flags = SWITCHDEV_F_DEFER, | |
1146 | .u.mrouter = is_mc_router, | |
1147 | }; | |
1148 | ||
1149 | switchdev_port_attr_set(p->dev, &attr); | |
1150 | } | |
1151 | ||
7e80c124 | 1152 | /* |
7c77602f | 1153 | * Add port to router_list |
7e80c124 | 1154 | * list is maintained ordered by pointer value |
1155 | * and locked by br->multicast_lock and RCU | |
1156 | */ | |
0909e117 HX |
1157 | static void br_multicast_add_router(struct net_bridge *br, |
1158 | struct net_bridge_port *port) | |
1159 | { | |
dcdca2c4 | 1160 | struct net_bridge_port *p; |
b67bfe0d | 1161 | struct hlist_node *slot = NULL; |
dcdca2c4 | 1162 | |
1a040eac NA |
1163 | if (!hlist_unhashed(&port->rlist)) |
1164 | return; | |
1165 | ||
b67bfe0d | 1166 | hlist_for_each_entry(p, &br->router_list, rlist) { |
7e80c124 | 1167 | if ((unsigned long) port >= (unsigned long) p) |
1168 | break; | |
b67bfe0d | 1169 | slot = &p->rlist; |
dcdca2c4 | 1170 | } |
1171 | ||
7e80c124 | 1172 | if (slot) |
1d023284 | 1173 | hlist_add_behind_rcu(&port->rlist, slot); |
dcdca2c4 | 1174 | else |
1175 | hlist_add_head_rcu(&port->rlist, &br->router_list); | |
949f1e39 | 1176 | br_rtr_notify(br->dev, port, RTM_NEWMDB); |
6d549648 | 1177 | br_port_mc_router_state_change(port, true); |
0909e117 HX |
1178 | } |
1179 | ||
eb1d1641 HX |
1180 | static void br_multicast_mark_router(struct net_bridge *br, |
1181 | struct net_bridge_port *port) | |
1182 | { | |
1183 | unsigned long now = jiffies; | |
eb1d1641 HX |
1184 | |
1185 | if (!port) { | |
77041420 YG |
1186 | if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) { |
1187 | if (!timer_pending(&br->multicast_router_timer)) | |
1188 | br_mc_router_state_change(br, true); | |
eb1d1641 HX |
1189 | mod_timer(&br->multicast_router_timer, |
1190 | now + br->multicast_querier_interval); | |
77041420 | 1191 | } |
eb1d1641 HX |
1192 | return; |
1193 | } | |
1194 | ||
a55d8246 NA |
1195 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
1196 | port->multicast_router == MDB_RTR_TYPE_PERM) | |
eb1d1641 HX |
1197 | return; |
1198 | ||
0909e117 | 1199 | br_multicast_add_router(br, port); |
eb1d1641 | 1200 | |
eb1d1641 HX |
1201 | mod_timer(&port->multicast_router_timer, |
1202 | now + br->multicast_querier_interval); | |
1203 | } | |
1204 | ||
1205 | static void br_multicast_query_received(struct net_bridge *br, | |
1206 | struct net_bridge_port *port, | |
90010b36 | 1207 | struct bridge_mcast_other_query *query, |
dc4eb53a | 1208 | struct br_ip *saddr, |
b00589af | 1209 | unsigned long max_delay) |
eb1d1641 | 1210 | { |
2cd41431 | 1211 | if (!br_multicast_select_querier(br, port, saddr)) |
eb1d1641 HX |
1212 | return; |
1213 | ||
dc4eb53a | 1214 | br_multicast_update_query_timer(br, query, max_delay); |
278e2148 | 1215 | br_multicast_mark_router(br, port); |
eb1d1641 HX |
1216 | } |
1217 | ||
9c2e955c | 1218 | static void br_ip4_multicast_query(struct net_bridge *br, |
1219 | struct net_bridge_port *port, | |
1220 | struct sk_buff *skb, | |
1221 | u16 vid) | |
eb1d1641 | 1222 | { |
ba5ea614 | 1223 | unsigned int transport_len = ip_transport_len(skb); |
b71d1d42 | 1224 | const struct iphdr *iph = ip_hdr(skb); |
eb1d1641 HX |
1225 | struct igmphdr *ih = igmp_hdr(skb); |
1226 | struct net_bridge_mdb_entry *mp; | |
1227 | struct igmpv3_query *ih3; | |
1228 | struct net_bridge_port_group *p; | |
e8051688 | 1229 | struct net_bridge_port_group __rcu **pp; |
dc4eb53a | 1230 | struct br_ip saddr; |
eb1d1641 HX |
1231 | unsigned long max_delay; |
1232 | unsigned long now = jiffies; | |
1233 | __be32 group; | |
1234 | ||
1235 | spin_lock(&br->multicast_lock); | |
1236 | if (!netif_running(br->dev) || | |
1237 | (port && port->state == BR_STATE_DISABLED)) | |
1238 | goto out; | |
1239 | ||
eb1d1641 HX |
1240 | group = ih->group; |
1241 | ||
ba5ea614 | 1242 | if (transport_len == sizeof(*ih)) { |
eb1d1641 HX |
1243 | max_delay = ih->code * (HZ / IGMP_TIMER_SCALE); |
1244 | ||
1245 | if (!max_delay) { | |
1246 | max_delay = 10 * HZ; | |
1247 | group = 0; | |
1248 | } | |
ba5ea614 | 1249 | } else if (transport_len >= sizeof(*ih3)) { |
eb1d1641 HX |
1250 | ih3 = igmpv3_query_hdr(skb); |
1251 | if (ih3->nsrcs) | |
bec68ff1 | 1252 | goto out; |
eb1d1641 | 1253 | |
0ba8c9ec YH |
1254 | max_delay = ih3->code ? |
1255 | IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1; | |
9afd85c9 | 1256 | } else { |
9ed973cc LL |
1257 | goto out; |
1258 | } | |
1259 | ||
dc4eb53a LL |
1260 | if (!group) { |
1261 | saddr.proto = htons(ETH_P_IP); | |
1262 | saddr.u.ip4 = iph->saddr; | |
b00589af | 1263 | |
dc4eb53a LL |
1264 | br_multicast_query_received(br, port, &br->ip4_other_query, |
1265 | &saddr, max_delay); | |
eb1d1641 | 1266 | goto out; |
dc4eb53a | 1267 | } |
eb1d1641 | 1268 | |
19e3a9c9 | 1269 | mp = br_mdb_ip4_get(br, group, vid); |
eb1d1641 HX |
1270 | if (!mp) |
1271 | goto out; | |
1272 | ||
1273 | max_delay *= br->multicast_last_member_count; | |
1274 | ||
ff0fd34e | 1275 | if (mp->host_joined && |
eb1d1641 HX |
1276 | (timer_pending(&mp->timer) ? |
1277 | time_after(mp->timer.expires, now + max_delay) : | |
1278 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1279 | mod_timer(&mp->timer, now + max_delay); | |
1280 | ||
e8051688 ED |
1281 | for (pp = &mp->ports; |
1282 | (p = mlock_dereference(*pp, br)) != NULL; | |
1283 | pp = &p->next) { | |
eb1d1641 HX |
1284 | if (timer_pending(&p->timer) ? |
1285 | time_after(p->timer.expires, now + max_delay) : | |
1286 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1287 | mod_timer(&p->timer, now + max_delay); |
eb1d1641 HX |
1288 | } |
1289 | ||
1290 | out: | |
1291 | spin_unlock(&br->multicast_lock); | |
eb1d1641 HX |
1292 | } |
1293 | ||
dfd56b8b | 1294 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1295 | static int br_ip6_multicast_query(struct net_bridge *br, |
1296 | struct net_bridge_port *port, | |
06499098 VY |
1297 | struct sk_buff *skb, |
1298 | u16 vid) | |
08b202b6 | 1299 | { |
ba5ea614 | 1300 | unsigned int transport_len = ipv6_transport_len(skb); |
b71d1d42 | 1301 | const struct ipv6hdr *ip6h = ipv6_hdr(skb); |
eca2a43b | 1302 | struct mld_msg *mld; |
08b202b6 YH |
1303 | struct net_bridge_mdb_entry *mp; |
1304 | struct mld2_query *mld2q; | |
e8051688 ED |
1305 | struct net_bridge_port_group *p; |
1306 | struct net_bridge_port_group __rcu **pp; | |
dc4eb53a | 1307 | struct br_ip saddr; |
08b202b6 YH |
1308 | unsigned long max_delay; |
1309 | unsigned long now = jiffies; | |
856ce5d0 | 1310 | unsigned int offset = skb_transport_offset(skb); |
b71d1d42 | 1311 | const struct in6_addr *group = NULL; |
9ed973cc | 1312 | bool is_general_query; |
08b202b6 YH |
1313 | int err = 0; |
1314 | ||
1315 | spin_lock(&br->multicast_lock); | |
1316 | if (!netif_running(br->dev) || | |
1317 | (port && port->state == BR_STATE_DISABLED)) | |
1318 | goto out; | |
1319 | ||
ba5ea614 | 1320 | if (transport_len == sizeof(*mld)) { |
856ce5d0 | 1321 | if (!pskb_may_pull(skb, offset + sizeof(*mld))) { |
08b202b6 YH |
1322 | err = -EINVAL; |
1323 | goto out; | |
1324 | } | |
1325 | mld = (struct mld_msg *) icmp6_hdr(skb); | |
4715213d | 1326 | max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay)); |
08b202b6 YH |
1327 | if (max_delay) |
1328 | group = &mld->mld_mca; | |
248ba8ec | 1329 | } else { |
856ce5d0 | 1330 | if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) { |
08b202b6 YH |
1331 | err = -EINVAL; |
1332 | goto out; | |
1333 | } | |
1334 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
1335 | if (!mld2q->mld2q_nsrcs) | |
1336 | group = &mld2q->mld2q_mca; | |
e3f5b170 DB |
1337 | |
1338 | max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL); | |
08b202b6 YH |
1339 | } |
1340 | ||
9ed973cc LL |
1341 | is_general_query = group && ipv6_addr_any(group); |
1342 | ||
dc4eb53a LL |
1343 | if (is_general_query) { |
1344 | saddr.proto = htons(ETH_P_IPV6); | |
1345 | saddr.u.ip6 = ip6h->saddr; | |
b00589af | 1346 | |
dc4eb53a LL |
1347 | br_multicast_query_received(br, port, &br->ip6_other_query, |
1348 | &saddr, max_delay); | |
08b202b6 | 1349 | goto out; |
6c03ee8b LL |
1350 | } else if (!group) { |
1351 | goto out; | |
dc4eb53a | 1352 | } |
08b202b6 | 1353 | |
19e3a9c9 | 1354 | mp = br_mdb_ip6_get(br, group, vid); |
08b202b6 YH |
1355 | if (!mp) |
1356 | goto out; | |
1357 | ||
1358 | max_delay *= br->multicast_last_member_count; | |
ff0fd34e | 1359 | if (mp->host_joined && |
08b202b6 YH |
1360 | (timer_pending(&mp->timer) ? |
1361 | time_after(mp->timer.expires, now + max_delay) : | |
1362 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1363 | mod_timer(&mp->timer, now + max_delay); | |
1364 | ||
e8051688 ED |
1365 | for (pp = &mp->ports; |
1366 | (p = mlock_dereference(*pp, br)) != NULL; | |
1367 | pp = &p->next) { | |
08b202b6 YH |
1368 | if (timer_pending(&p->timer) ? |
1369 | time_after(p->timer.expires, now + max_delay) : | |
1370 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1371 | mod_timer(&p->timer, now + max_delay); |
08b202b6 YH |
1372 | } |
1373 | ||
1374 | out: | |
1375 | spin_unlock(&br->multicast_lock); | |
1376 | return err; | |
1377 | } | |
1378 | #endif | |
1379 | ||
90010b36 LL |
1380 | static void |
1381 | br_multicast_leave_group(struct net_bridge *br, | |
1382 | struct net_bridge_port *port, | |
1383 | struct br_ip *group, | |
1384 | struct bridge_mcast_other_query *other_query, | |
6db6f0ea FF |
1385 | struct bridge_mcast_own_query *own_query, |
1386 | const unsigned char *src) | |
eb1d1641 | 1387 | { |
eb1d1641 HX |
1388 | struct net_bridge_mdb_entry *mp; |
1389 | struct net_bridge_port_group *p; | |
1390 | unsigned long now; | |
1391 | unsigned long time; | |
1392 | ||
eb1d1641 HX |
1393 | spin_lock(&br->multicast_lock); |
1394 | if (!netif_running(br->dev) || | |
544586f7 | 1395 | (port && port->state == BR_STATE_DISABLED)) |
eb1d1641 HX |
1396 | goto out; |
1397 | ||
19e3a9c9 | 1398 | mp = br_mdb_ip_get(br, group); |
eb1d1641 HX |
1399 | if (!mp) |
1400 | goto out; | |
1401 | ||
544586f7 SA |
1402 | if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) { |
1403 | struct net_bridge_port_group __rcu **pp; | |
1404 | ||
1405 | for (pp = &mp->ports; | |
1406 | (p = mlock_dereference(*pp, br)) != NULL; | |
1407 | pp = &p->next) { | |
6db6f0ea | 1408 | if (!br_port_group_equal(p, port, src)) |
544586f7 SA |
1409 | continue; |
1410 | ||
1411 | rcu_assign_pointer(*pp, p->next); | |
1412 | hlist_del_init(&p->mglist); | |
1413 | del_timer(&p->timer); | |
4329596c | 1414 | kfree_rcu(p, rcu); |
45ebcce5 ER |
1415 | br_mdb_notify(br->dev, port, group, RTM_DELMDB, |
1416 | p->flags); | |
544586f7 | 1417 | |
ff0fd34e | 1418 | if (!mp->ports && !mp->host_joined && |
544586f7 SA |
1419 | netif_running(br->dev)) |
1420 | mod_timer(&mp->timer, jiffies); | |
1421 | } | |
1422 | goto out; | |
1423 | } | |
1424 | ||
1425 | if (timer_pending(&other_query->timer)) | |
1426 | goto out; | |
1427 | ||
675779ad | 1428 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { |
6b7df111 CW |
1429 | __br_multicast_send_query(br, port, &mp->addr); |
1430 | ||
1431 | time = jiffies + br->multicast_last_member_count * | |
1432 | br->multicast_last_member_interval; | |
cc0fdd80 | 1433 | |
90010b36 | 1434 | mod_timer(&own_query->timer, time); |
6b7df111 CW |
1435 | |
1436 | for (p = mlock_dereference(mp->ports, br); | |
1437 | p != NULL; | |
1438 | p = mlock_dereference(p->next, br)) { | |
6db6f0ea | 1439 | if (!br_port_group_equal(p, port, src)) |
6b7df111 CW |
1440 | continue; |
1441 | ||
1442 | if (!hlist_unhashed(&p->mglist) && | |
1443 | (timer_pending(&p->timer) ? | |
1444 | time_after(p->timer.expires, time) : | |
1445 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1446 | mod_timer(&p->timer, time); | |
1447 | } | |
1448 | ||
1449 | break; | |
1450 | } | |
1451 | } | |
1452 | ||
eb1d1641 HX |
1453 | now = jiffies; |
1454 | time = now + br->multicast_last_member_count * | |
1455 | br->multicast_last_member_interval; | |
1456 | ||
1457 | if (!port) { | |
ff0fd34e | 1458 | if (mp->host_joined && |
eb1d1641 HX |
1459 | (timer_pending(&mp->timer) ? |
1460 | time_after(mp->timer.expires, time) : | |
1461 | try_to_del_timer_sync(&mp->timer) >= 0)) { | |
1462 | mod_timer(&mp->timer, time); | |
eb1d1641 | 1463 | } |
454594f3 LL |
1464 | |
1465 | goto out; | |
1466 | } | |
1467 | ||
1468 | for (p = mlock_dereference(mp->ports, br); | |
1469 | p != NULL; | |
1470 | p = mlock_dereference(p->next, br)) { | |
1471 | if (p->port != port) | |
1472 | continue; | |
1473 | ||
1474 | if (!hlist_unhashed(&p->mglist) && | |
1475 | (timer_pending(&p->timer) ? | |
1476 | time_after(p->timer.expires, time) : | |
1477 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1478 | mod_timer(&p->timer, time); | |
1479 | } | |
1480 | ||
1481 | break; | |
eb1d1641 | 1482 | } |
eb1d1641 HX |
1483 | out: |
1484 | spin_unlock(&br->multicast_lock); | |
1485 | } | |
1486 | ||
8ef2a9a5 YH |
1487 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
1488 | struct net_bridge_port *port, | |
b0e9a30d | 1489 | __be32 group, |
6db6f0ea FF |
1490 | __u16 vid, |
1491 | const unsigned char *src) | |
8ef2a9a5 YH |
1492 | { |
1493 | struct br_ip br_group; | |
90010b36 | 1494 | struct bridge_mcast_own_query *own_query; |
8ef2a9a5 YH |
1495 | |
1496 | if (ipv4_is_local_multicast(group)) | |
1497 | return; | |
1498 | ||
90010b36 LL |
1499 | own_query = port ? &port->ip4_own_query : &br->ip4_own_query; |
1500 | ||
1515a63f | 1501 | memset(&br_group, 0, sizeof(br_group)); |
8ef2a9a5 YH |
1502 | br_group.u.ip4 = group; |
1503 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 1504 | br_group.vid = vid; |
8ef2a9a5 | 1505 | |
90010b36 | 1506 | br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query, |
6db6f0ea | 1507 | own_query, src); |
8ef2a9a5 YH |
1508 | } |
1509 | ||
dfd56b8b | 1510 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1511 | static void br_ip6_multicast_leave_group(struct net_bridge *br, |
1512 | struct net_bridge_port *port, | |
b0e9a30d | 1513 | const struct in6_addr *group, |
6db6f0ea FF |
1514 | __u16 vid, |
1515 | const unsigned char *src) | |
08b202b6 YH |
1516 | { |
1517 | struct br_ip br_group; | |
90010b36 | 1518 | struct bridge_mcast_own_query *own_query; |
08b202b6 | 1519 | |
3c3769e6 | 1520 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
1521 | return; |
1522 | ||
90010b36 LL |
1523 | own_query = port ? &port->ip6_own_query : &br->ip6_own_query; |
1524 | ||
1515a63f | 1525 | memset(&br_group, 0, sizeof(br_group)); |
4e3fd7a0 | 1526 | br_group.u.ip6 = *group; |
08b202b6 | 1527 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 1528 | br_group.vid = vid; |
08b202b6 | 1529 | |
90010b36 | 1530 | br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query, |
6db6f0ea | 1531 | own_query, src); |
08b202b6 YH |
1532 | } |
1533 | #endif | |
8ef2a9a5 | 1534 | |
1080ab95 NA |
1535 | static void br_multicast_err_count(const struct net_bridge *br, |
1536 | const struct net_bridge_port *p, | |
1537 | __be16 proto) | |
1538 | { | |
1539 | struct bridge_mcast_stats __percpu *stats; | |
1540 | struct bridge_mcast_stats *pstats; | |
1541 | ||
675779ad | 1542 | if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) |
1080ab95 NA |
1543 | return; |
1544 | ||
1545 | if (p) | |
1546 | stats = p->mcast_stats; | |
1547 | else | |
1548 | stats = br->mcast_stats; | |
1549 | if (WARN_ON(!stats)) | |
1550 | return; | |
1551 | ||
1552 | pstats = this_cpu_ptr(stats); | |
1553 | ||
1554 | u64_stats_update_begin(&pstats->syncp); | |
1555 | switch (proto) { | |
1556 | case htons(ETH_P_IP): | |
1557 | pstats->mstats.igmp_parse_errors++; | |
1558 | break; | |
1559 | #if IS_ENABLED(CONFIG_IPV6) | |
1560 | case htons(ETH_P_IPV6): | |
1561 | pstats->mstats.mld_parse_errors++; | |
1562 | break; | |
1563 | #endif | |
1564 | } | |
1565 | u64_stats_update_end(&pstats->syncp); | |
1566 | } | |
1567 | ||
91b02d3d NA |
1568 | static void br_multicast_pim(struct net_bridge *br, |
1569 | struct net_bridge_port *port, | |
1570 | const struct sk_buff *skb) | |
1571 | { | |
1572 | unsigned int offset = skb_transport_offset(skb); | |
1573 | struct pimhdr *pimhdr, _pimhdr; | |
1574 | ||
1575 | pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr); | |
1576 | if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION || | |
1577 | pim_hdr_type(pimhdr) != PIM_TYPE_HELLO) | |
1578 | return; | |
1579 | ||
1580 | br_multicast_mark_router(br, port); | |
1581 | } | |
1582 | ||
4b3087c7 LL |
1583 | static int br_ip4_multicast_mrd_rcv(struct net_bridge *br, |
1584 | struct net_bridge_port *port, | |
1585 | struct sk_buff *skb) | |
1586 | { | |
1587 | if (ip_hdr(skb)->protocol != IPPROTO_IGMP || | |
1588 | igmp_hdr(skb)->type != IGMP_MRDISC_ADV) | |
1589 | return -ENOMSG; | |
1590 | ||
1591 | br_multicast_mark_router(br, port); | |
1592 | ||
1593 | return 0; | |
1594 | } | |
1595 | ||
eb1d1641 HX |
1596 | static int br_multicast_ipv4_rcv(struct net_bridge *br, |
1597 | struct net_bridge_port *port, | |
06499098 VY |
1598 | struct sk_buff *skb, |
1599 | u16 vid) | |
eb1d1641 | 1600 | { |
6db6f0ea | 1601 | const unsigned char *src; |
eb1d1641 | 1602 | struct igmphdr *ih; |
eb1d1641 HX |
1603 | int err; |
1604 | ||
ba5ea614 | 1605 | err = ip_mc_check_igmp(skb); |
eb1d1641 | 1606 | |
9afd85c9 | 1607 | if (err == -ENOMSG) { |
91b02d3d | 1608 | if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) { |
bd4265fe | 1609 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
91b02d3d NA |
1610 | } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) { |
1611 | if (ip_hdr(skb)->protocol == IPPROTO_PIM) | |
1612 | br_multicast_pim(br, port, skb); | |
4b3087c7 | 1613 | } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) { |
08e71623 | 1614 | br_ip4_multicast_mrd_rcv(br, port, skb); |
91b02d3d | 1615 | } |
4b3087c7 | 1616 | |
eb1d1641 | 1617 | return 0; |
9afd85c9 | 1618 | } else if (err < 0) { |
1080ab95 | 1619 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1620 | return err; |
bd4265fe | 1621 | } |
eb1d1641 | 1622 | |
9afd85c9 | 1623 | ih = igmp_hdr(skb); |
6db6f0ea | 1624 | src = eth_hdr(skb)->h_source; |
1080ab95 | 1625 | BR_INPUT_SKB_CB(skb)->igmp = ih->type; |
eb1d1641 HX |
1626 | |
1627 | switch (ih->type) { | |
1628 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
1629 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
62b2bcb4 | 1630 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
6db6f0ea | 1631 | err = br_ip4_multicast_add_group(br, port, ih->group, vid, src); |
eb1d1641 HX |
1632 | break; |
1633 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
ba5ea614 | 1634 | err = br_ip4_multicast_igmp3_report(br, port, skb, vid); |
eb1d1641 HX |
1635 | break; |
1636 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
ba5ea614 | 1637 | br_ip4_multicast_query(br, port, skb, vid); |
eb1d1641 HX |
1638 | break; |
1639 | case IGMP_HOST_LEAVE_MESSAGE: | |
6db6f0ea | 1640 | br_ip4_multicast_leave_group(br, port, ih->group, vid, src); |
eb1d1641 HX |
1641 | break; |
1642 | } | |
1643 | ||
a65056ec | 1644 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1645 | BR_MCAST_DIR_RX); |
1646 | ||
eb1d1641 HX |
1647 | return err; |
1648 | } | |
1649 | ||
dfd56b8b | 1650 | #if IS_ENABLED(CONFIG_IPV6) |
4b3087c7 LL |
1651 | static int br_ip6_multicast_mrd_rcv(struct net_bridge *br, |
1652 | struct net_bridge_port *port, | |
1653 | struct sk_buff *skb) | |
1654 | { | |
1655 | int ret; | |
1656 | ||
1657 | if (ipv6_hdr(skb)->nexthdr != IPPROTO_ICMPV6) | |
1658 | return -ENOMSG; | |
1659 | ||
1660 | ret = ipv6_mc_check_icmpv6(skb); | |
1661 | if (ret < 0) | |
1662 | return ret; | |
1663 | ||
1664 | if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV) | |
1665 | return -ENOMSG; | |
1666 | ||
1667 | br_multicast_mark_router(br, port); | |
1668 | ||
1669 | return 0; | |
1670 | } | |
1671 | ||
08b202b6 YH |
1672 | static int br_multicast_ipv6_rcv(struct net_bridge *br, |
1673 | struct net_bridge_port *port, | |
06499098 VY |
1674 | struct sk_buff *skb, |
1675 | u16 vid) | |
08b202b6 | 1676 | { |
6db6f0ea | 1677 | const unsigned char *src; |
9afd85c9 | 1678 | struct mld_msg *mld; |
08b202b6 YH |
1679 | int err; |
1680 | ||
ba5ea614 | 1681 | err = ipv6_mc_check_mld(skb); |
08b202b6 | 1682 | |
9afd85c9 LL |
1683 | if (err == -ENOMSG) { |
1684 | if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr)) | |
1685 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
4b3087c7 LL |
1686 | |
1687 | if (ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr)) { | |
1688 | err = br_ip6_multicast_mrd_rcv(br, port, skb); | |
1689 | ||
1690 | if (err < 0 && err != -ENOMSG) { | |
1691 | br_multicast_err_count(br, port, skb->protocol); | |
1692 | return err; | |
1693 | } | |
1694 | } | |
1695 | ||
08b202b6 | 1696 | return 0; |
9afd85c9 | 1697 | } else if (err < 0) { |
1080ab95 | 1698 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1699 | return err; |
08b202b6 YH |
1700 | } |
1701 | ||
9afd85c9 | 1702 | mld = (struct mld_msg *)skb_transport_header(skb); |
1080ab95 | 1703 | BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type; |
08b202b6 | 1704 | |
9afd85c9 | 1705 | switch (mld->mld_type) { |
08b202b6 | 1706 | case ICMPV6_MGM_REPORT: |
6db6f0ea | 1707 | src = eth_hdr(skb)->h_source; |
fc2af6c7 | 1708 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
6db6f0ea FF |
1709 | err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid, |
1710 | src); | |
08b202b6 | 1711 | break; |
08b202b6 | 1712 | case ICMPV6_MLD2_REPORT: |
ba5ea614 | 1713 | err = br_ip6_multicast_mld2_report(br, port, skb, vid); |
08b202b6 YH |
1714 | break; |
1715 | case ICMPV6_MGM_QUERY: | |
ba5ea614 | 1716 | err = br_ip6_multicast_query(br, port, skb, vid); |
08b202b6 YH |
1717 | break; |
1718 | case ICMPV6_MGM_REDUCTION: | |
6db6f0ea FF |
1719 | src = eth_hdr(skb)->h_source; |
1720 | br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src); | |
9afd85c9 | 1721 | break; |
08b202b6 YH |
1722 | } |
1723 | ||
a65056ec | 1724 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1725 | BR_MCAST_DIR_RX); |
1726 | ||
08b202b6 YH |
1727 | return err; |
1728 | } | |
1729 | #endif | |
1730 | ||
eb1d1641 | 1731 | int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, |
06499098 | 1732 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 1733 | { |
1080ab95 NA |
1734 | int ret = 0; |
1735 | ||
1fafc7a9 YH |
1736 | BR_INPUT_SKB_CB(skb)->igmp = 0; |
1737 | BR_INPUT_SKB_CB(skb)->mrouters_only = 0; | |
1738 | ||
13cefad2 | 1739 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
1740 | return 0; |
1741 | ||
1742 | switch (skb->protocol) { | |
1743 | case htons(ETH_P_IP): | |
1080ab95 NA |
1744 | ret = br_multicast_ipv4_rcv(br, port, skb, vid); |
1745 | break; | |
dfd56b8b | 1746 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 1747 | case htons(ETH_P_IPV6): |
1080ab95 NA |
1748 | ret = br_multicast_ipv6_rcv(br, port, skb, vid); |
1749 | break; | |
08b202b6 | 1750 | #endif |
eb1d1641 HX |
1751 | } |
1752 | ||
1080ab95 | 1753 | return ret; |
eb1d1641 HX |
1754 | } |
1755 | ||
cc0fdd80 | 1756 | static void br_multicast_query_expired(struct net_bridge *br, |
2cd41431 LL |
1757 | struct bridge_mcast_own_query *query, |
1758 | struct bridge_mcast_querier *querier) | |
cc0fdd80 LL |
1759 | { |
1760 | spin_lock(&br->multicast_lock); | |
1761 | if (query->startup_sent < br->multicast_startup_query_count) | |
1762 | query->startup_sent++; | |
1763 | ||
71d9f614 | 1764 | RCU_INIT_POINTER(querier->port, NULL); |
cc0fdd80 LL |
1765 | br_multicast_send_query(br, NULL, query); |
1766 | spin_unlock(&br->multicast_lock); | |
1767 | } | |
1768 | ||
88c1f37f | 1769 | static void br_ip4_multicast_query_expired(struct timer_list *t) |
eb1d1641 | 1770 | { |
88c1f37f | 1771 | struct net_bridge *br = from_timer(br, t, ip4_own_query.timer); |
eb1d1641 | 1772 | |
2cd41431 | 1773 | br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier); |
cc0fdd80 | 1774 | } |
eb1d1641 | 1775 | |
cc0fdd80 | 1776 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f | 1777 | static void br_ip6_multicast_query_expired(struct timer_list *t) |
cc0fdd80 | 1778 | { |
88c1f37f | 1779 | struct net_bridge *br = from_timer(br, t, ip6_own_query.timer); |
eb1d1641 | 1780 | |
2cd41431 | 1781 | br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier); |
eb1d1641 | 1782 | } |
cc0fdd80 | 1783 | #endif |
eb1d1641 HX |
1784 | |
1785 | void br_multicast_init(struct net_bridge *br) | |
1786 | { | |
d08c6bc0 | 1787 | br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX; |
eb1d1641 | 1788 | |
7f0aec7a | 1789 | br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
eb1d1641 HX |
1790 | br->multicast_last_member_count = 2; |
1791 | br->multicast_startup_query_count = 2; | |
1792 | ||
1793 | br->multicast_last_member_interval = HZ; | |
1794 | br->multicast_query_response_interval = 10 * HZ; | |
1795 | br->multicast_startup_query_interval = 125 * HZ / 4; | |
1796 | br->multicast_query_interval = 125 * HZ; | |
1797 | br->multicast_querier_interval = 255 * HZ; | |
1798 | br->multicast_membership_interval = 260 * HZ; | |
1799 | ||
90010b36 | 1800 | br->ip4_other_query.delay_time = 0; |
2cd41431 | 1801 | br->ip4_querier.port = NULL; |
aa2ae3e7 | 1802 | br->multicast_igmp_version = 2; |
cc0fdd80 | 1803 | #if IS_ENABLED(CONFIG_IPV6) |
aa2ae3e7 | 1804 | br->multicast_mld_version = 1; |
90010b36 | 1805 | br->ip6_other_query.delay_time = 0; |
2cd41431 | 1806 | br->ip6_querier.port = NULL; |
cc0fdd80 | 1807 | #endif |
6919622a | 1808 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true); |
675779ad | 1809 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); |
b00589af | 1810 | |
eb1d1641 | 1811 | spin_lock_init(&br->multicast_lock); |
88c1f37f AP |
1812 | timer_setup(&br->multicast_router_timer, |
1813 | br_multicast_local_router_expired, 0); | |
1814 | timer_setup(&br->ip4_other_query.timer, | |
1815 | br_ip4_multicast_querier_expired, 0); | |
1816 | timer_setup(&br->ip4_own_query.timer, | |
1817 | br_ip4_multicast_query_expired, 0); | |
cc0fdd80 | 1818 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f AP |
1819 | timer_setup(&br->ip6_other_query.timer, |
1820 | br_ip6_multicast_querier_expired, 0); | |
1821 | timer_setup(&br->ip6_own_query.timer, | |
1822 | br_ip6_multicast_query_expired, 0); | |
cc0fdd80 | 1823 | #endif |
19e3a9c9 | 1824 | INIT_HLIST_HEAD(&br->mdb_list); |
eb1d1641 HX |
1825 | } |
1826 | ||
4effd28c LL |
1827 | static void br_ip4_multicast_join_snoopers(struct net_bridge *br) |
1828 | { | |
1829 | struct in_device *in_dev = in_dev_get(br->dev); | |
1830 | ||
1831 | if (!in_dev) | |
1832 | return; | |
1833 | ||
9fb20801 | 1834 | __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC); |
4effd28c LL |
1835 | in_dev_put(in_dev); |
1836 | } | |
1837 | ||
1838 | #if IS_ENABLED(CONFIG_IPV6) | |
1839 | static void br_ip6_multicast_join_snoopers(struct net_bridge *br) | |
1840 | { | |
1841 | struct in6_addr addr; | |
1842 | ||
1843 | ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a)); | |
1844 | ipv6_dev_mc_inc(br->dev, &addr); | |
1845 | } | |
1846 | #else | |
1847 | static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br) | |
1848 | { | |
1849 | } | |
1850 | #endif | |
1851 | ||
1852 | static void br_multicast_join_snoopers(struct net_bridge *br) | |
1853 | { | |
1854 | br_ip4_multicast_join_snoopers(br); | |
1855 | br_ip6_multicast_join_snoopers(br); | |
1856 | } | |
1857 | ||
1858 | static void br_ip4_multicast_leave_snoopers(struct net_bridge *br) | |
1859 | { | |
1860 | struct in_device *in_dev = in_dev_get(br->dev); | |
1861 | ||
1862 | if (WARN_ON(!in_dev)) | |
1863 | return; | |
1864 | ||
9fb20801 | 1865 | __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC); |
4effd28c LL |
1866 | in_dev_put(in_dev); |
1867 | } | |
1868 | ||
1869 | #if IS_ENABLED(CONFIG_IPV6) | |
1870 | static void br_ip6_multicast_leave_snoopers(struct net_bridge *br) | |
1871 | { | |
1872 | struct in6_addr addr; | |
1873 | ||
1874 | ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a)); | |
1875 | ipv6_dev_mc_dec(br->dev, &addr); | |
1876 | } | |
1877 | #else | |
1878 | static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br) | |
1879 | { | |
1880 | } | |
1881 | #endif | |
1882 | ||
1883 | static void br_multicast_leave_snoopers(struct net_bridge *br) | |
1884 | { | |
1885 | br_ip4_multicast_leave_snoopers(br); | |
1886 | br_ip6_multicast_leave_snoopers(br); | |
1887 | } | |
1888 | ||
cc0fdd80 | 1889 | static void __br_multicast_open(struct net_bridge *br, |
90010b36 | 1890 | struct bridge_mcast_own_query *query) |
eb1d1641 | 1891 | { |
cc0fdd80 | 1892 | query->startup_sent = 0; |
eb1d1641 | 1893 | |
13cefad2 | 1894 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
1895 | return; |
1896 | ||
cc0fdd80 LL |
1897 | mod_timer(&query->timer, jiffies); |
1898 | } | |
1899 | ||
1900 | void br_multicast_open(struct net_bridge *br) | |
1901 | { | |
4effd28c LL |
1902 | if (br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
1903 | br_multicast_join_snoopers(br); | |
1904 | ||
90010b36 | 1905 | __br_multicast_open(br, &br->ip4_own_query); |
cc0fdd80 | 1906 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1907 | __br_multicast_open(br, &br->ip6_own_query); |
cc0fdd80 | 1908 | #endif |
eb1d1641 HX |
1909 | } |
1910 | ||
1911 | void br_multicast_stop(struct net_bridge *br) | |
1912 | { | |
eb1d1641 | 1913 | del_timer_sync(&br->multicast_router_timer); |
90010b36 LL |
1914 | del_timer_sync(&br->ip4_other_query.timer); |
1915 | del_timer_sync(&br->ip4_own_query.timer); | |
cc0fdd80 | 1916 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 LL |
1917 | del_timer_sync(&br->ip6_other_query.timer); |
1918 | del_timer_sync(&br->ip6_own_query.timer); | |
cc0fdd80 | 1919 | #endif |
4effd28c LL |
1920 | |
1921 | if (br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
1922 | br_multicast_leave_snoopers(br); | |
e10177ab SA |
1923 | } |
1924 | ||
1925 | void br_multicast_dev_del(struct net_bridge *br) | |
1926 | { | |
e10177ab | 1927 | struct net_bridge_mdb_entry *mp; |
19e3a9c9 | 1928 | struct hlist_node *tmp; |
eb1d1641 HX |
1929 | |
1930 | spin_lock_bh(&br->multicast_lock); | |
19e3a9c9 NA |
1931 | hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node) { |
1932 | del_timer(&mp->timer); | |
1933 | rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode, | |
1934 | br_mdb_rht_params); | |
1935 | hlist_del_rcu(&mp->mdb_node); | |
4329596c | 1936 | kfree_rcu(mp, rcu); |
eb1d1641 | 1937 | } |
eb1d1641 | 1938 | spin_unlock_bh(&br->multicast_lock); |
19e3a9c9 | 1939 | |
4329596c | 1940 | rcu_barrier(); |
eb1d1641 | 1941 | } |
0909e117 HX |
1942 | |
1943 | int br_multicast_set_router(struct net_bridge *br, unsigned long val) | |
1944 | { | |
6ae4ae8e | 1945 | int err = -EINVAL; |
0909e117 HX |
1946 | |
1947 | spin_lock_bh(&br->multicast_lock); | |
0909e117 HX |
1948 | |
1949 | switch (val) { | |
7f0aec7a NA |
1950 | case MDB_RTR_TYPE_DISABLED: |
1951 | case MDB_RTR_TYPE_PERM: | |
77041420 | 1952 | br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM); |
0909e117 | 1953 | del_timer(&br->multicast_router_timer); |
77041420 YG |
1954 | br->multicast_router = val; |
1955 | err = 0; | |
1956 | break; | |
7f0aec7a | 1957 | case MDB_RTR_TYPE_TEMP_QUERY: |
77041420 YG |
1958 | if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY) |
1959 | br_mc_router_state_change(br, false); | |
0909e117 HX |
1960 | br->multicast_router = val; |
1961 | err = 0; | |
1962 | break; | |
0909e117 HX |
1963 | } |
1964 | ||
0909e117 HX |
1965 | spin_unlock_bh(&br->multicast_lock); |
1966 | ||
1967 | return err; | |
1968 | } | |
1969 | ||
7f0aec7a NA |
1970 | static void __del_port_router(struct net_bridge_port *p) |
1971 | { | |
1972 | if (hlist_unhashed(&p->rlist)) | |
1973 | return; | |
1974 | hlist_del_init_rcu(&p->rlist); | |
1975 | br_rtr_notify(p->br->dev, p, RTM_DELMDB); | |
6d549648 | 1976 | br_port_mc_router_state_change(p, false); |
f12e7d95 NF |
1977 | |
1978 | /* don't allow timer refresh */ | |
1979 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
1980 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
7f0aec7a NA |
1981 | } |
1982 | ||
0909e117 HX |
1983 | int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val) |
1984 | { | |
1985 | struct net_bridge *br = p->br; | |
a55d8246 | 1986 | unsigned long now = jiffies; |
6ae4ae8e | 1987 | int err = -EINVAL; |
0909e117 HX |
1988 | |
1989 | spin_lock(&br->multicast_lock); | |
4950cfd1 | 1990 | if (p->multicast_router == val) { |
a55d8246 NA |
1991 | /* Refresh the temp router port timer */ |
1992 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
1993 | mod_timer(&p->multicast_router_timer, | |
1994 | now + br->multicast_querier_interval); | |
4950cfd1 NA |
1995 | err = 0; |
1996 | goto unlock; | |
1997 | } | |
0909e117 | 1998 | switch (val) { |
7f0aec7a NA |
1999 | case MDB_RTR_TYPE_DISABLED: |
2000 | p->multicast_router = MDB_RTR_TYPE_DISABLED; | |
2001 | __del_port_router(p); | |
2002 | del_timer(&p->multicast_router_timer); | |
2003 | break; | |
2004 | case MDB_RTR_TYPE_TEMP_QUERY: | |
2005 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
2006 | __del_port_router(p); | |
2007 | break; | |
2008 | case MDB_RTR_TYPE_PERM: | |
2009 | p->multicast_router = MDB_RTR_TYPE_PERM; | |
0909e117 | 2010 | del_timer(&p->multicast_router_timer); |
0909e117 HX |
2011 | br_multicast_add_router(br, p); |
2012 | break; | |
a55d8246 NA |
2013 | case MDB_RTR_TYPE_TEMP: |
2014 | p->multicast_router = MDB_RTR_TYPE_TEMP; | |
2015 | br_multicast_mark_router(br, p); | |
2016 | break; | |
7f0aec7a NA |
2017 | default: |
2018 | goto unlock; | |
0909e117 | 2019 | } |
7f0aec7a NA |
2020 | err = 0; |
2021 | unlock: | |
0909e117 HX |
2022 | spin_unlock(&br->multicast_lock); |
2023 | ||
2024 | return err; | |
2025 | } | |
561f1103 | 2026 | |
cc0fdd80 | 2027 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 2028 | struct bridge_mcast_own_query *query) |
561f1103 HX |
2029 | { |
2030 | struct net_bridge_port *port; | |
74857216 | 2031 | |
cc0fdd80 | 2032 | __br_multicast_open(br, query); |
74857216 HX |
2033 | |
2034 | list_for_each_entry(port, &br->port_list, list) { | |
2035 | if (port->state == BR_STATE_DISABLED || | |
2036 | port->state == BR_STATE_BLOCKING) | |
2037 | continue; | |
2038 | ||
90010b36 LL |
2039 | if (query == &br->ip4_own_query) |
2040 | br_multicast_enable(&port->ip4_own_query); | |
cc0fdd80 LL |
2041 | #if IS_ENABLED(CONFIG_IPV6) |
2042 | else | |
90010b36 | 2043 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 2044 | #endif |
74857216 HX |
2045 | } |
2046 | } | |
2047 | ||
2048 | int br_multicast_toggle(struct net_bridge *br, unsigned long val) | |
2049 | { | |
7cb3f921 | 2050 | struct net_bridge_port *port; |
561f1103 | 2051 | |
ef5e0d82 | 2052 | spin_lock_bh(&br->multicast_lock); |
13cefad2 | 2053 | if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val) |
561f1103 HX |
2054 | goto unlock; |
2055 | ||
13cefad2 NA |
2056 | br_mc_disabled_update(br->dev, val); |
2057 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val); | |
4effd28c LL |
2058 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) { |
2059 | br_multicast_leave_snoopers(br); | |
561f1103 | 2060 | goto unlock; |
4effd28c | 2061 | } |
561f1103 | 2062 | |
3a7fda06 HX |
2063 | if (!netif_running(br->dev)) |
2064 | goto unlock; | |
2065 | ||
7cb3f921 NA |
2066 | br_multicast_open(br); |
2067 | list_for_each_entry(port, &br->port_list, list) | |
2068 | __br_multicast_enable_port(port); | |
561f1103 HX |
2069 | |
2070 | unlock: | |
ef5e0d82 | 2071 | spin_unlock_bh(&br->multicast_lock); |
561f1103 | 2072 | |
a26d94bf | 2073 | return 0; |
561f1103 | 2074 | } |
b195167f | 2075 | |
9341b988 IS |
2076 | bool br_multicast_enabled(const struct net_device *dev) |
2077 | { | |
2078 | struct net_bridge *br = netdev_priv(dev); | |
2079 | ||
13cefad2 | 2080 | return !!br_opt_get(br, BROPT_MULTICAST_ENABLED); |
9341b988 IS |
2081 | } |
2082 | EXPORT_SYMBOL_GPL(br_multicast_enabled); | |
2083 | ||
0912bda4 YG |
2084 | bool br_multicast_router(const struct net_device *dev) |
2085 | { | |
2086 | struct net_bridge *br = netdev_priv(dev); | |
2087 | bool is_router; | |
2088 | ||
2089 | spin_lock_bh(&br->multicast_lock); | |
2090 | is_router = br_multicast_is_router(br); | |
2091 | spin_unlock_bh(&br->multicast_lock); | |
2092 | return is_router; | |
2093 | } | |
2094 | EXPORT_SYMBOL_GPL(br_multicast_router); | |
2095 | ||
c5c23260 HX |
2096 | int br_multicast_set_querier(struct net_bridge *br, unsigned long val) |
2097 | { | |
b00589af LL |
2098 | unsigned long max_delay; |
2099 | ||
c5c23260 HX |
2100 | val = !!val; |
2101 | ||
2102 | spin_lock_bh(&br->multicast_lock); | |
675779ad | 2103 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val) |
c5c23260 HX |
2104 | goto unlock; |
2105 | ||
675779ad | 2106 | br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val); |
b00589af LL |
2107 | if (!val) |
2108 | goto unlock; | |
2109 | ||
2110 | max_delay = br->multicast_query_response_interval; | |
b00589af | 2111 | |
90010b36 LL |
2112 | if (!timer_pending(&br->ip4_other_query.timer)) |
2113 | br->ip4_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2114 | |
90010b36 | 2115 | br_multicast_start_querier(br, &br->ip4_own_query); |
cc0fdd80 LL |
2116 | |
2117 | #if IS_ENABLED(CONFIG_IPV6) | |
90010b36 LL |
2118 | if (!timer_pending(&br->ip6_other_query.timer)) |
2119 | br->ip6_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2120 | |
90010b36 | 2121 | br_multicast_start_querier(br, &br->ip6_own_query); |
cc0fdd80 | 2122 | #endif |
c5c23260 HX |
2123 | |
2124 | unlock: | |
2125 | spin_unlock_bh(&br->multicast_lock); | |
2126 | ||
2127 | return 0; | |
2128 | } | |
2129 | ||
5e923585 NA |
2130 | int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val) |
2131 | { | |
2132 | /* Currently we support only version 2 and 3 */ | |
2133 | switch (val) { | |
2134 | case 2: | |
2135 | case 3: | |
2136 | break; | |
2137 | default: | |
2138 | return -EINVAL; | |
2139 | } | |
2140 | ||
2141 | spin_lock_bh(&br->multicast_lock); | |
2142 | br->multicast_igmp_version = val; | |
2143 | spin_unlock_bh(&br->multicast_lock); | |
2144 | ||
2145 | return 0; | |
2146 | } | |
2147 | ||
aa2ae3e7 NA |
2148 | #if IS_ENABLED(CONFIG_IPV6) |
2149 | int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val) | |
2150 | { | |
2151 | /* Currently we support version 1 and 2 */ | |
2152 | switch (val) { | |
2153 | case 1: | |
2154 | case 2: | |
2155 | break; | |
2156 | default: | |
2157 | return -EINVAL; | |
2158 | } | |
2159 | ||
2160 | spin_lock_bh(&br->multicast_lock); | |
2161 | br->multicast_mld_version = val; | |
2162 | spin_unlock_bh(&br->multicast_lock); | |
2163 | ||
2164 | return 0; | |
2165 | } | |
2166 | #endif | |
2167 | ||
07f8ac4a LL |
2168 | /** |
2169 | * br_multicast_list_adjacent - Returns snooped multicast addresses | |
2170 | * @dev: The bridge port adjacent to which to retrieve addresses | |
2171 | * @br_ip_list: The list to store found, snooped multicast IP addresses in | |
2172 | * | |
2173 | * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast | |
2174 | * snooping feature on all bridge ports of dev's bridge device, excluding | |
2175 | * the addresses from dev itself. | |
2176 | * | |
2177 | * Returns the number of items added to br_ip_list. | |
2178 | * | |
2179 | * Notes: | |
2180 | * - br_ip_list needs to be initialized by caller | |
2181 | * - br_ip_list might contain duplicates in the end | |
2182 | * (needs to be taken care of by caller) | |
2183 | * - br_ip_list needs to be freed by caller | |
2184 | */ | |
2185 | int br_multicast_list_adjacent(struct net_device *dev, | |
2186 | struct list_head *br_ip_list) | |
2187 | { | |
2188 | struct net_bridge *br; | |
2189 | struct net_bridge_port *port; | |
2190 | struct net_bridge_port_group *group; | |
2191 | struct br_ip_list *entry; | |
2192 | int count = 0; | |
2193 | ||
2194 | rcu_read_lock(); | |
2195 | if (!br_ip_list || !br_port_exists(dev)) | |
2196 | goto unlock; | |
2197 | ||
2198 | port = br_port_get_rcu(dev); | |
2199 | if (!port || !port->br) | |
2200 | goto unlock; | |
2201 | ||
2202 | br = port->br; | |
2203 | ||
2204 | list_for_each_entry_rcu(port, &br->port_list, list) { | |
2205 | if (!port->dev || port->dev == dev) | |
2206 | continue; | |
2207 | ||
2208 | hlist_for_each_entry_rcu(group, &port->mglist, mglist) { | |
2209 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); | |
2210 | if (!entry) | |
2211 | goto unlock; | |
2212 | ||
2213 | entry->addr = group->addr; | |
2214 | list_add(&entry->list, br_ip_list); | |
2215 | count++; | |
2216 | } | |
2217 | } | |
2218 | ||
2219 | unlock: | |
2220 | rcu_read_unlock(); | |
2221 | return count; | |
2222 | } | |
2223 | EXPORT_SYMBOL_GPL(br_multicast_list_adjacent); | |
2cd41431 | 2224 | |
c34963e2 LL |
2225 | /** |
2226 | * br_multicast_has_querier_anywhere - Checks for a querier on a bridge | |
2227 | * @dev: The bridge port providing the bridge on which to check for a querier | |
2228 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2229 | * | |
2230 | * Checks whether the given interface has a bridge on top and if so returns | |
2231 | * true if a valid querier exists anywhere on the bridged link layer. | |
2232 | * Otherwise returns false. | |
2233 | */ | |
2234 | bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto) | |
2235 | { | |
2236 | struct net_bridge *br; | |
2237 | struct net_bridge_port *port; | |
2238 | struct ethhdr eth; | |
2239 | bool ret = false; | |
2240 | ||
2241 | rcu_read_lock(); | |
2242 | if (!br_port_exists(dev)) | |
2243 | goto unlock; | |
2244 | ||
2245 | port = br_port_get_rcu(dev); | |
2246 | if (!port || !port->br) | |
2247 | goto unlock; | |
2248 | ||
2249 | br = port->br; | |
2250 | ||
2251 | memset(ð, 0, sizeof(eth)); | |
2252 | eth.h_proto = htons(proto); | |
2253 | ||
2254 | ret = br_multicast_querier_exists(br, ð); | |
2255 | ||
2256 | unlock: | |
2257 | rcu_read_unlock(); | |
2258 | return ret; | |
2259 | } | |
2260 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere); | |
2261 | ||
2cd41431 LL |
2262 | /** |
2263 | * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port | |
2264 | * @dev: The bridge port adjacent to which to check for a querier | |
2265 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2266 | * | |
2267 | * Checks whether the given interface has a bridge on top and if so returns | |
2268 | * true if a selected querier is behind one of the other ports of this | |
2269 | * bridge. Otherwise returns false. | |
2270 | */ | |
2271 | bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto) | |
2272 | { | |
2273 | struct net_bridge *br; | |
2274 | struct net_bridge_port *port; | |
2275 | bool ret = false; | |
2276 | ||
2277 | rcu_read_lock(); | |
2278 | if (!br_port_exists(dev)) | |
2279 | goto unlock; | |
2280 | ||
2281 | port = br_port_get_rcu(dev); | |
2282 | if (!port || !port->br) | |
2283 | goto unlock; | |
2284 | ||
2285 | br = port->br; | |
2286 | ||
2287 | switch (proto) { | |
2288 | case ETH_P_IP: | |
2289 | if (!timer_pending(&br->ip4_other_query.timer) || | |
2290 | rcu_dereference(br->ip4_querier.port) == port) | |
2291 | goto unlock; | |
2292 | break; | |
3993c4e1 | 2293 | #if IS_ENABLED(CONFIG_IPV6) |
2cd41431 LL |
2294 | case ETH_P_IPV6: |
2295 | if (!timer_pending(&br->ip6_other_query.timer) || | |
2296 | rcu_dereference(br->ip6_querier.port) == port) | |
2297 | goto unlock; | |
2298 | break; | |
3993c4e1 | 2299 | #endif |
2cd41431 LL |
2300 | default: |
2301 | goto unlock; | |
2302 | } | |
2303 | ||
2304 | ret = true; | |
2305 | unlock: | |
2306 | rcu_read_unlock(); | |
2307 | return ret; | |
2308 | } | |
2309 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent); | |
1080ab95 NA |
2310 | |
2311 | static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, | |
a65056ec | 2312 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2313 | { |
2314 | struct bridge_mcast_stats *pstats = this_cpu_ptr(stats); | |
a65056ec NA |
2315 | __be16 proto = skb->protocol; |
2316 | unsigned int t_len; | |
1080ab95 NA |
2317 | |
2318 | u64_stats_update_begin(&pstats->syncp); | |
2319 | switch (proto) { | |
2320 | case htons(ETH_P_IP): | |
a65056ec | 2321 | t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb); |
1080ab95 NA |
2322 | switch (type) { |
2323 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
2324 | pstats->mstats.igmp_v1reports[dir]++; | |
2325 | break; | |
2326 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
2327 | pstats->mstats.igmp_v2reports[dir]++; | |
2328 | break; | |
2329 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
2330 | pstats->mstats.igmp_v3reports[dir]++; | |
2331 | break; | |
2332 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
a65056ec NA |
2333 | if (t_len != sizeof(struct igmphdr)) { |
2334 | pstats->mstats.igmp_v3queries[dir]++; | |
2335 | } else { | |
2336 | unsigned int offset = skb_transport_offset(skb); | |
2337 | struct igmphdr *ih, _ihdr; | |
2338 | ||
2339 | ih = skb_header_pointer(skb, offset, | |
2340 | sizeof(_ihdr), &_ihdr); | |
2341 | if (!ih) | |
2342 | break; | |
2343 | if (!ih->code) | |
2344 | pstats->mstats.igmp_v1queries[dir]++; | |
2345 | else | |
2346 | pstats->mstats.igmp_v2queries[dir]++; | |
2347 | } | |
1080ab95 NA |
2348 | break; |
2349 | case IGMP_HOST_LEAVE_MESSAGE: | |
2350 | pstats->mstats.igmp_leaves[dir]++; | |
2351 | break; | |
2352 | } | |
2353 | break; | |
2354 | #if IS_ENABLED(CONFIG_IPV6) | |
2355 | case htons(ETH_P_IPV6): | |
a65056ec NA |
2356 | t_len = ntohs(ipv6_hdr(skb)->payload_len) + |
2357 | sizeof(struct ipv6hdr); | |
2358 | t_len -= skb_network_header_len(skb); | |
1080ab95 NA |
2359 | switch (type) { |
2360 | case ICMPV6_MGM_REPORT: | |
2361 | pstats->mstats.mld_v1reports[dir]++; | |
2362 | break; | |
2363 | case ICMPV6_MLD2_REPORT: | |
2364 | pstats->mstats.mld_v2reports[dir]++; | |
2365 | break; | |
2366 | case ICMPV6_MGM_QUERY: | |
a65056ec NA |
2367 | if (t_len != sizeof(struct mld_msg)) |
2368 | pstats->mstats.mld_v2queries[dir]++; | |
2369 | else | |
2370 | pstats->mstats.mld_v1queries[dir]++; | |
1080ab95 NA |
2371 | break; |
2372 | case ICMPV6_MGM_REDUCTION: | |
2373 | pstats->mstats.mld_leaves[dir]++; | |
2374 | break; | |
2375 | } | |
2376 | break; | |
2377 | #endif /* CONFIG_IPV6 */ | |
2378 | } | |
2379 | u64_stats_update_end(&pstats->syncp); | |
2380 | } | |
2381 | ||
2382 | void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, | |
a65056ec | 2383 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2384 | { |
2385 | struct bridge_mcast_stats __percpu *stats; | |
2386 | ||
2387 | /* if multicast_disabled is true then igmp type can't be set */ | |
675779ad | 2388 | if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) |
1080ab95 NA |
2389 | return; |
2390 | ||
2391 | if (p) | |
2392 | stats = p->mcast_stats; | |
2393 | else | |
2394 | stats = br->mcast_stats; | |
2395 | if (WARN_ON(!stats)) | |
2396 | return; | |
2397 | ||
a65056ec | 2398 | br_mcast_stats_add(stats, skb, type, dir); |
1080ab95 NA |
2399 | } |
2400 | ||
2401 | int br_multicast_init_stats(struct net_bridge *br) | |
2402 | { | |
2403 | br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); | |
2404 | if (!br->mcast_stats) | |
2405 | return -ENOMEM; | |
2406 | ||
2407 | return 0; | |
2408 | } | |
2409 | ||
b6fe0440 IS |
2410 | void br_multicast_uninit_stats(struct net_bridge *br) |
2411 | { | |
2412 | free_percpu(br->mcast_stats); | |
2413 | } | |
2414 | ||
1080ab95 NA |
2415 | static void mcast_stats_add_dir(u64 *dst, u64 *src) |
2416 | { | |
2417 | dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX]; | |
2418 | dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX]; | |
2419 | } | |
2420 | ||
2421 | void br_multicast_get_stats(const struct net_bridge *br, | |
2422 | const struct net_bridge_port *p, | |
2423 | struct br_mcast_stats *dest) | |
2424 | { | |
2425 | struct bridge_mcast_stats __percpu *stats; | |
2426 | struct br_mcast_stats tdst; | |
2427 | int i; | |
2428 | ||
2429 | memset(dest, 0, sizeof(*dest)); | |
2430 | if (p) | |
2431 | stats = p->mcast_stats; | |
2432 | else | |
2433 | stats = br->mcast_stats; | |
2434 | if (WARN_ON(!stats)) | |
2435 | return; | |
2436 | ||
2437 | memset(&tdst, 0, sizeof(tdst)); | |
2438 | for_each_possible_cpu(i) { | |
2439 | struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i); | |
2440 | struct br_mcast_stats temp; | |
2441 | unsigned int start; | |
2442 | ||
2443 | do { | |
2444 | start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); | |
2445 | memcpy(&temp, &cpu_stats->mstats, sizeof(temp)); | |
2446 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); | |
2447 | ||
a65056ec NA |
2448 | mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries); |
2449 | mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries); | |
2450 | mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries); | |
1080ab95 NA |
2451 | mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves); |
2452 | mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports); | |
2453 | mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports); | |
2454 | mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports); | |
2455 | tdst.igmp_parse_errors += temp.igmp_parse_errors; | |
2456 | ||
a65056ec NA |
2457 | mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries); |
2458 | mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries); | |
1080ab95 NA |
2459 | mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves); |
2460 | mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports); | |
2461 | mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports); | |
2462 | tdst.mld_parse_errors += temp.mld_parse_errors; | |
2463 | } | |
2464 | memcpy(dest, &tdst, sizeof(*dest)); | |
2465 | } | |
19e3a9c9 NA |
2466 | |
2467 | int br_mdb_hash_init(struct net_bridge *br) | |
2468 | { | |
2469 | return rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params); | |
2470 | } | |
2471 | ||
2472 | void br_mdb_hash_fini(struct net_bridge *br) | |
2473 | { | |
2474 | rhashtable_destroy(&br->mdb_hash_tbl); | |
2475 | } |