Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
eb1d1641 HX |
2 | /* |
3 | * Bridge multicast support. | |
4 | * | |
5 | * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au> | |
eb1d1641 HX |
6 | */ |
7 | ||
8 | #include <linux/err.h> | |
07f8ac4a | 9 | #include <linux/export.h> |
eb1d1641 HX |
10 | #include <linux/if_ether.h> |
11 | #include <linux/igmp.h> | |
4b3087c7 | 12 | #include <linux/in.h> |
eb1d1641 HX |
13 | #include <linux/jhash.h> |
14 | #include <linux/kernel.h> | |
b195167f | 15 | #include <linux/log2.h> |
eb1d1641 HX |
16 | #include <linux/netdevice.h> |
17 | #include <linux/netfilter_bridge.h> | |
18 | #include <linux/random.h> | |
19 | #include <linux/rculist.h> | |
20 | #include <linux/skbuff.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/timer.h> | |
1c8ad5bf | 23 | #include <linux/inetdevice.h> |
91b02d3d | 24 | #include <linux/mroute.h> |
eb1d1641 | 25 | #include <net/ip.h> |
147c1e9b | 26 | #include <net/switchdev.h> |
dfd56b8b | 27 | #if IS_ENABLED(CONFIG_IPV6) |
4b3087c7 | 28 | #include <linux/icmpv6.h> |
08b202b6 YH |
29 | #include <net/ipv6.h> |
30 | #include <net/mld.h> | |
d4c4f07d | 31 | #include <net/ip6_checksum.h> |
3c3769e6 | 32 | #include <net/addrconf.h> |
08b202b6 | 33 | #endif |
eb1d1641 HX |
34 | |
35 | #include "br_private.h" | |
36 | ||
19e3a9c9 NA |
37 | static const struct rhashtable_params br_mdb_rht_params = { |
38 | .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode), | |
39 | .key_offset = offsetof(struct net_bridge_mdb_entry, addr), | |
40 | .key_len = sizeof(struct br_ip), | |
41 | .automatic_shrinking = true, | |
19e3a9c9 NA |
42 | }; |
43 | ||
cc0fdd80 | 44 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 45 | struct bridge_mcast_own_query *query); |
754bc547 SA |
46 | static void br_multicast_add_router(struct net_bridge *br, |
47 | struct net_bridge_port *port); | |
bc8c20ac SA |
48 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
49 | struct net_bridge_port *port, | |
50 | __be32 group, | |
6db6f0ea FF |
51 | __u16 vid, |
52 | const unsigned char *src); | |
53 | ||
f12e7d95 | 54 | static void __del_port_router(struct net_bridge_port *p); |
bc8c20ac SA |
55 | #if IS_ENABLED(CONFIG_IPV6) |
56 | static void br_ip6_multicast_leave_group(struct net_bridge *br, | |
57 | struct net_bridge_port *port, | |
58 | const struct in6_addr *group, | |
6db6f0ea | 59 | __u16 vid, const unsigned char *src); |
bc8c20ac | 60 | #endif |
c83b8fab | 61 | |
19e3a9c9 NA |
62 | static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br, |
63 | struct br_ip *dst) | |
08b202b6 | 64 | { |
19e3a9c9 | 65 | return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params); |
08b202b6 | 66 | } |
08b202b6 | 67 | |
19e3a9c9 NA |
68 | struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br, |
69 | struct br_ip *dst) | |
eb1d1641 | 70 | { |
19e3a9c9 | 71 | struct net_bridge_mdb_entry *ent; |
eb1d1641 | 72 | |
19e3a9c9 | 73 | lockdep_assert_held_once(&br->multicast_lock); |
eb1d1641 | 74 | |
19e3a9c9 NA |
75 | rcu_read_lock(); |
76 | ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params); | |
77 | rcu_read_unlock(); | |
7f285fa7 | 78 | |
19e3a9c9 | 79 | return ent; |
7f285fa7 HX |
80 | } |
81 | ||
19e3a9c9 NA |
82 | static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br, |
83 | __be32 dst, __u16 vid) | |
eb1d1641 | 84 | { |
8ef2a9a5 YH |
85 | struct br_ip br_dst; |
86 | ||
19e3a9c9 | 87 | memset(&br_dst, 0, sizeof(br_dst)); |
8ef2a9a5 YH |
88 | br_dst.u.ip4 = dst; |
89 | br_dst.proto = htons(ETH_P_IP); | |
b0e9a30d | 90 | br_dst.vid = vid; |
0821ec55 | 91 | |
19e3a9c9 | 92 | return br_mdb_ip_get(br, &br_dst); |
8ef2a9a5 YH |
93 | } |
94 | ||
dfd56b8b | 95 | #if IS_ENABLED(CONFIG_IPV6) |
19e3a9c9 NA |
96 | static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br, |
97 | const struct in6_addr *dst, | |
98 | __u16 vid) | |
08b202b6 YH |
99 | { |
100 | struct br_ip br_dst; | |
0821ec55 | 101 | |
19e3a9c9 | 102 | memset(&br_dst, 0, sizeof(br_dst)); |
4e3fd7a0 | 103 | br_dst.u.ip6 = *dst; |
08b202b6 | 104 | br_dst.proto = htons(ETH_P_IPV6); |
b0e9a30d | 105 | br_dst.vid = vid; |
08b202b6 | 106 | |
19e3a9c9 | 107 | return br_mdb_ip_get(br, &br_dst); |
08b202b6 YH |
108 | } |
109 | #endif | |
110 | ||
eb1d1641 | 111 | struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, |
fbca58a2 | 112 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 113 | { |
8ef2a9a5 YH |
114 | struct br_ip ip; |
115 | ||
13cefad2 | 116 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
117 | return NULL; |
118 | ||
8ef2a9a5 | 119 | if (BR_INPUT_SKB_CB(skb)->igmp) |
eb1d1641 HX |
120 | return NULL; |
121 | ||
19e3a9c9 | 122 | memset(&ip, 0, sizeof(ip)); |
8ef2a9a5 | 123 | ip.proto = skb->protocol; |
fbca58a2 | 124 | ip.vid = vid; |
8ef2a9a5 | 125 | |
eb1d1641 HX |
126 | switch (skb->protocol) { |
127 | case htons(ETH_P_IP): | |
8ef2a9a5 YH |
128 | ip.u.ip4 = ip_hdr(skb)->daddr; |
129 | break; | |
dfd56b8b | 130 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 131 | case htons(ETH_P_IPV6): |
4e3fd7a0 | 132 | ip.u.ip6 = ipv6_hdr(skb)->daddr; |
08b202b6 YH |
133 | break; |
134 | #endif | |
8ef2a9a5 YH |
135 | default: |
136 | return NULL; | |
eb1d1641 HX |
137 | } |
138 | ||
19e3a9c9 | 139 | return br_mdb_ip_get_rcu(br, &ip); |
eb1d1641 HX |
140 | } |
141 | ||
88c1f37f | 142 | static void br_multicast_group_expired(struct timer_list *t) |
eb1d1641 | 143 | { |
88c1f37f | 144 | struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer); |
eb1d1641 | 145 | struct net_bridge *br = mp->br; |
eb1d1641 HX |
146 | |
147 | spin_lock(&br->multicast_lock); | |
148 | if (!netif_running(br->dev) || timer_pending(&mp->timer)) | |
149 | goto out; | |
150 | ||
1bc844ee | 151 | br_multicast_host_leave(mp, true); |
eb1d1641 HX |
152 | |
153 | if (mp->ports) | |
154 | goto out; | |
155 | ||
19e3a9c9 NA |
156 | rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode, |
157 | br_mdb_rht_params); | |
158 | hlist_del_rcu(&mp->mdb_node); | |
eb1d1641 | 159 | |
4329596c | 160 | kfree_rcu(mp, rcu); |
eb1d1641 HX |
161 | |
162 | out: | |
163 | spin_unlock(&br->multicast_lock); | |
164 | } | |
165 | ||
166 | static void br_multicast_del_pg(struct net_bridge *br, | |
167 | struct net_bridge_port_group *pg) | |
168 | { | |
eb1d1641 HX |
169 | struct net_bridge_mdb_entry *mp; |
170 | struct net_bridge_port_group *p; | |
e8051688 ED |
171 | struct net_bridge_port_group __rcu **pp; |
172 | ||
19e3a9c9 | 173 | mp = br_mdb_ip_get(br, &pg->addr); |
eb1d1641 HX |
174 | if (WARN_ON(!mp)) |
175 | return; | |
176 | ||
e8051688 ED |
177 | for (pp = &mp->ports; |
178 | (p = mlock_dereference(*pp, br)) != NULL; | |
179 | pp = &p->next) { | |
eb1d1641 HX |
180 | if (p != pg) |
181 | continue; | |
182 | ||
83f6a740 | 183 | rcu_assign_pointer(*pp, p->next); |
eb1d1641 HX |
184 | hlist_del_init(&p->mglist); |
185 | del_timer(&p->timer); | |
45ebcce5 ER |
186 | br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB, |
187 | p->flags); | |
4329596c | 188 | kfree_rcu(p, rcu); |
eb1d1641 | 189 | |
ff0fd34e | 190 | if (!mp->ports && !mp->host_joined && |
eb1d1641 HX |
191 | netif_running(br->dev)) |
192 | mod_timer(&mp->timer, jiffies); | |
193 | ||
194 | return; | |
195 | } | |
196 | ||
197 | WARN_ON(1); | |
198 | } | |
199 | ||
88c1f37f | 200 | static void br_multicast_port_group_expired(struct timer_list *t) |
eb1d1641 | 201 | { |
88c1f37f | 202 | struct net_bridge_port_group *pg = from_timer(pg, t, timer); |
eb1d1641 HX |
203 | struct net_bridge *br = pg->port->br; |
204 | ||
205 | spin_lock(&br->multicast_lock); | |
206 | if (!netif_running(br->dev) || timer_pending(&pg->timer) || | |
9d06b6d8 | 207 | hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT) |
eb1d1641 HX |
208 | goto out; |
209 | ||
210 | br_multicast_del_pg(br, pg); | |
211 | ||
212 | out: | |
213 | spin_unlock(&br->multicast_lock); | |
214 | } | |
215 | ||
8ef2a9a5 | 216 | static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
217 | __be32 group, |
218 | u8 *igmp_type) | |
eb1d1641 | 219 | { |
5e923585 NA |
220 | struct igmpv3_query *ihv3; |
221 | size_t igmp_hdr_size; | |
eb1d1641 HX |
222 | struct sk_buff *skb; |
223 | struct igmphdr *ih; | |
224 | struct ethhdr *eth; | |
225 | struct iphdr *iph; | |
226 | ||
5e923585 NA |
227 | igmp_hdr_size = sizeof(*ih); |
228 | if (br->multicast_igmp_version == 3) | |
229 | igmp_hdr_size = sizeof(*ihv3); | |
eb1d1641 | 230 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) + |
5e923585 | 231 | igmp_hdr_size + 4); |
eb1d1641 HX |
232 | if (!skb) |
233 | goto out; | |
234 | ||
235 | skb->protocol = htons(ETH_P_IP); | |
236 | ||
237 | skb_reset_mac_header(skb); | |
238 | eth = eth_hdr(skb); | |
239 | ||
e5a727f6 | 240 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
eb1d1641 HX |
241 | eth->h_dest[0] = 1; |
242 | eth->h_dest[1] = 0; | |
243 | eth->h_dest[2] = 0x5e; | |
244 | eth->h_dest[3] = 0; | |
245 | eth->h_dest[4] = 0; | |
246 | eth->h_dest[5] = 1; | |
247 | eth->h_proto = htons(ETH_P_IP); | |
248 | skb_put(skb, sizeof(*eth)); | |
249 | ||
250 | skb_set_network_header(skb, skb->len); | |
251 | iph = ip_hdr(skb); | |
252 | ||
253 | iph->version = 4; | |
254 | iph->ihl = 6; | |
255 | iph->tos = 0xc0; | |
5e923585 | 256 | iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4); |
eb1d1641 HX |
257 | iph->id = 0; |
258 | iph->frag_off = htons(IP_DF); | |
259 | iph->ttl = 1; | |
260 | iph->protocol = IPPROTO_IGMP; | |
675779ad | 261 | iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ? |
1c8ad5bf | 262 | inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0; |
eb1d1641 HX |
263 | iph->daddr = htonl(INADDR_ALLHOSTS_GROUP); |
264 | ((u8 *)&iph[1])[0] = IPOPT_RA; | |
265 | ((u8 *)&iph[1])[1] = 4; | |
266 | ((u8 *)&iph[1])[2] = 0; | |
267 | ((u8 *)&iph[1])[3] = 0; | |
268 | ip_send_check(iph); | |
269 | skb_put(skb, 24); | |
270 | ||
271 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 272 | *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY; |
eb1d1641 | 273 | |
5e923585 NA |
274 | switch (br->multicast_igmp_version) { |
275 | case 2: | |
276 | ih = igmp_hdr(skb); | |
277 | ih->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
278 | ih->code = (group ? br->multicast_last_member_interval : | |
279 | br->multicast_query_response_interval) / | |
280 | (HZ / IGMP_TIMER_SCALE); | |
281 | ih->group = group; | |
282 | ih->csum = 0; | |
283 | ih->csum = ip_compute_csum((void *)ih, sizeof(*ih)); | |
284 | break; | |
285 | case 3: | |
286 | ihv3 = igmpv3_query_hdr(skb); | |
287 | ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
288 | ihv3->code = (group ? br->multicast_last_member_interval : | |
289 | br->multicast_query_response_interval) / | |
290 | (HZ / IGMP_TIMER_SCALE); | |
291 | ihv3->group = group; | |
292 | ihv3->qqic = br->multicast_query_interval / HZ; | |
293 | ihv3->nsrcs = 0; | |
294 | ihv3->resv = 0; | |
295 | ihv3->suppress = 0; | |
296 | ihv3->qrv = 2; | |
297 | ihv3->csum = 0; | |
298 | ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3)); | |
299 | break; | |
300 | } | |
301 | ||
302 | skb_put(skb, igmp_hdr_size); | |
eb1d1641 HX |
303 | __skb_pull(skb, sizeof(*eth)); |
304 | ||
305 | out: | |
306 | return skb; | |
307 | } | |
308 | ||
dfd56b8b | 309 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 310 | static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
311 | const struct in6_addr *grp, |
312 | u8 *igmp_type) | |
08b202b6 | 313 | { |
aa2ae3e7 NA |
314 | struct mld2_query *mld2q; |
315 | unsigned long interval; | |
08b202b6 YH |
316 | struct ipv6hdr *ip6h; |
317 | struct mld_msg *mldq; | |
aa2ae3e7 NA |
318 | size_t mld_hdr_size; |
319 | struct sk_buff *skb; | |
08b202b6 YH |
320 | struct ethhdr *eth; |
321 | u8 *hopopt; | |
08b202b6 | 322 | |
aa2ae3e7 NA |
323 | mld_hdr_size = sizeof(*mldq); |
324 | if (br->multicast_mld_version == 2) | |
325 | mld_hdr_size = sizeof(*mld2q); | |
08b202b6 | 326 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) + |
aa2ae3e7 | 327 | 8 + mld_hdr_size); |
08b202b6 YH |
328 | if (!skb) |
329 | goto out; | |
330 | ||
331 | skb->protocol = htons(ETH_P_IPV6); | |
332 | ||
333 | /* Ethernet header */ | |
334 | skb_reset_mac_header(skb); | |
335 | eth = eth_hdr(skb); | |
336 | ||
e5a727f6 | 337 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
08b202b6 YH |
338 | eth->h_proto = htons(ETH_P_IPV6); |
339 | skb_put(skb, sizeof(*eth)); | |
340 | ||
341 | /* IPv6 header + HbH option */ | |
342 | skb_set_network_header(skb, skb->len); | |
343 | ip6h = ipv6_hdr(skb); | |
344 | ||
345 | *(__force __be32 *)ip6h = htonl(0x60000000); | |
aa2ae3e7 | 346 | ip6h->payload_len = htons(8 + mld_hdr_size); |
08b202b6 YH |
347 | ip6h->nexthdr = IPPROTO_HOPOPTS; |
348 | ip6h->hop_limit = 1; | |
a7bff75b | 349 | ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1)); |
d1d81d4c UW |
350 | if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, |
351 | &ip6h->saddr)) { | |
352 | kfree_skb(skb); | |
675779ad | 353 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false); |
d1d81d4c UW |
354 | return NULL; |
355 | } | |
0888d5f3 | 356 | |
675779ad | 357 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); |
36cff5a1 | 358 | ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); |
08b202b6 YH |
359 | |
360 | hopopt = (u8 *)(ip6h + 1); | |
361 | hopopt[0] = IPPROTO_ICMPV6; /* next hdr */ | |
362 | hopopt[1] = 0; /* length of HbH */ | |
363 | hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */ | |
364 | hopopt[3] = 2; /* Length of RA Option */ | |
365 | hopopt[4] = 0; /* Type = 0x0000 (MLD) */ | |
366 | hopopt[5] = 0; | |
1de5a71c EZ |
367 | hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */ |
368 | hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */ | |
08b202b6 YH |
369 | |
370 | skb_put(skb, sizeof(*ip6h) + 8); | |
371 | ||
372 | /* ICMPv6 */ | |
373 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 374 | interval = ipv6_addr_any(grp) ? |
32de868c LL |
375 | br->multicast_query_response_interval : |
376 | br->multicast_last_member_interval; | |
1080ab95 | 377 | *igmp_type = ICMPV6_MGM_QUERY; |
aa2ae3e7 NA |
378 | switch (br->multicast_mld_version) { |
379 | case 1: | |
380 | mldq = (struct mld_msg *)icmp6_hdr(skb); | |
381 | mldq->mld_type = ICMPV6_MGM_QUERY; | |
382 | mldq->mld_code = 0; | |
383 | mldq->mld_cksum = 0; | |
384 | mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval)); | |
385 | mldq->mld_reserved = 0; | |
386 | mldq->mld_mca = *grp; | |
387 | mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
388 | sizeof(*mldq), IPPROTO_ICMPV6, | |
389 | csum_partial(mldq, | |
390 | sizeof(*mldq), | |
391 | 0)); | |
392 | break; | |
393 | case 2: | |
394 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
53631a5f | 395 | mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval)); |
aa2ae3e7 NA |
396 | mld2q->mld2q_type = ICMPV6_MGM_QUERY; |
397 | mld2q->mld2q_code = 0; | |
398 | mld2q->mld2q_cksum = 0; | |
399 | mld2q->mld2q_resv1 = 0; | |
400 | mld2q->mld2q_resv2 = 0; | |
401 | mld2q->mld2q_suppress = 0; | |
402 | mld2q->mld2q_qrv = 2; | |
403 | mld2q->mld2q_nsrcs = 0; | |
404 | mld2q->mld2q_qqic = br->multicast_query_interval / HZ; | |
405 | mld2q->mld2q_mca = *grp; | |
406 | mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
407 | sizeof(*mld2q), | |
408 | IPPROTO_ICMPV6, | |
409 | csum_partial(mld2q, | |
410 | sizeof(*mld2q), | |
411 | 0)); | |
412 | break; | |
413 | } | |
414 | skb_put(skb, mld_hdr_size); | |
08b202b6 YH |
415 | |
416 | __skb_pull(skb, sizeof(*eth)); | |
417 | ||
418 | out: | |
419 | return skb; | |
420 | } | |
421 | #endif | |
422 | ||
8ef2a9a5 | 423 | static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
424 | struct br_ip *addr, |
425 | u8 *igmp_type) | |
8ef2a9a5 YH |
426 | { |
427 | switch (addr->proto) { | |
428 | case htons(ETH_P_IP): | |
1080ab95 | 429 | return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type); |
dfd56b8b | 430 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 431 | case htons(ETH_P_IPV6): |
1080ab95 NA |
432 | return br_ip6_multicast_alloc_query(br, &addr->u.ip6, |
433 | igmp_type); | |
08b202b6 | 434 | #endif |
8ef2a9a5 YH |
435 | } |
436 | return NULL; | |
437 | } | |
438 | ||
cfd56754 | 439 | struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, |
5e923585 | 440 | struct br_ip *group) |
eb1d1641 | 441 | { |
eb1d1641 | 442 | struct net_bridge_mdb_entry *mp; |
4c0833bc | 443 | int err; |
eb1d1641 | 444 | |
19e3a9c9 NA |
445 | mp = br_mdb_ip_get(br, group); |
446 | if (mp) | |
447 | return mp; | |
eb1d1641 | 448 | |
19e3a9c9 NA |
449 | if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) { |
450 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false); | |
451 | return ERR_PTR(-E2BIG); | |
eb1d1641 HX |
452 | } |
453 | ||
454 | mp = kzalloc(sizeof(*mp), GFP_ATOMIC); | |
455 | if (unlikely(!mp)) | |
4c0833bc | 456 | return ERR_PTR(-ENOMEM); |
eb1d1641 HX |
457 | |
458 | mp->br = br; | |
8ef2a9a5 | 459 | mp->addr = *group; |
88c1f37f | 460 | timer_setup(&mp->timer, br_multicast_group_expired, 0); |
19e3a9c9 NA |
461 | err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode, |
462 | br_mdb_rht_params); | |
463 | if (err) { | |
464 | kfree(mp); | |
465 | mp = ERR_PTR(err); | |
466 | } else { | |
467 | hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list); | |
468 | } | |
1faabf2a | 469 | |
eb1d1641 HX |
470 | return mp; |
471 | } | |
472 | ||
cfd56754 CW |
473 | struct net_bridge_port_group *br_multicast_new_port_group( |
474 | struct net_bridge_port *port, | |
475 | struct br_ip *group, | |
ccb1c31a | 476 | struct net_bridge_port_group __rcu *next, |
6db6f0ea FF |
477 | unsigned char flags, |
478 | const unsigned char *src) | |
cfd56754 CW |
479 | { |
480 | struct net_bridge_port_group *p; | |
481 | ||
482 | p = kzalloc(sizeof(*p), GFP_ATOMIC); | |
483 | if (unlikely(!p)) | |
484 | return NULL; | |
485 | ||
486 | p->addr = *group; | |
487 | p->port = port; | |
9d06b6d8 | 488 | p->flags = flags; |
eca2a43b | 489 | rcu_assign_pointer(p->next, next); |
cfd56754 | 490 | hlist_add_head(&p->mglist, &port->mglist); |
88c1f37f | 491 | timer_setup(&p->timer, br_multicast_port_group_expired, 0); |
6db6f0ea FF |
492 | |
493 | if (src) | |
494 | memcpy(p->eth_addr, src, ETH_ALEN); | |
495 | else | |
1bfe45f4 | 496 | eth_broadcast_addr(p->eth_addr); |
6db6f0ea | 497 | |
cfd56754 CW |
498 | return p; |
499 | } | |
500 | ||
6db6f0ea FF |
501 | static bool br_port_group_equal(struct net_bridge_port_group *p, |
502 | struct net_bridge_port *port, | |
503 | const unsigned char *src) | |
504 | { | |
505 | if (p->port != port) | |
506 | return false; | |
507 | ||
508 | if (!(port->flags & BR_MULTICAST_TO_UNICAST)) | |
509 | return true; | |
510 | ||
511 | return ether_addr_equal(src, p->eth_addr); | |
512 | } | |
513 | ||
1bc844ee NA |
514 | void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify) |
515 | { | |
516 | if (!mp->host_joined) { | |
517 | mp->host_joined = true; | |
518 | if (notify) | |
519 | br_mdb_notify(mp->br->dev, NULL, &mp->addr, | |
520 | RTM_NEWMDB, 0); | |
521 | } | |
522 | mod_timer(&mp->timer, jiffies + mp->br->multicast_membership_interval); | |
523 | } | |
524 | ||
525 | void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify) | |
526 | { | |
527 | if (!mp->host_joined) | |
528 | return; | |
529 | ||
530 | mp->host_joined = false; | |
531 | if (notify) | |
532 | br_mdb_notify(mp->br->dev, NULL, &mp->addr, RTM_DELMDB, 0); | |
533 | } | |
534 | ||
eb1d1641 | 535 | static int br_multicast_add_group(struct net_bridge *br, |
8ef2a9a5 | 536 | struct net_bridge_port *port, |
6db6f0ea FF |
537 | struct br_ip *group, |
538 | const unsigned char *src) | |
eb1d1641 | 539 | { |
e8051688 | 540 | struct net_bridge_port_group __rcu **pp; |
5e923585 NA |
541 | struct net_bridge_port_group *p; |
542 | struct net_bridge_mdb_entry *mp; | |
454594f3 | 543 | unsigned long now = jiffies; |
eb1d1641 HX |
544 | int err; |
545 | ||
eb1d1641 HX |
546 | spin_lock(&br->multicast_lock); |
547 | if (!netif_running(br->dev) || | |
548 | (port && port->state == BR_STATE_DISABLED)) | |
549 | goto out; | |
550 | ||
19e3a9c9 | 551 | mp = br_multicast_new_group(br, group); |
eb1d1641 | 552 | err = PTR_ERR(mp); |
4c0833bc | 553 | if (IS_ERR(mp)) |
eb1d1641 HX |
554 | goto err; |
555 | ||
556 | if (!port) { | |
1bc844ee | 557 | br_multicast_host_join(mp, true); |
eb1d1641 HX |
558 | goto out; |
559 | } | |
560 | ||
e8051688 ED |
561 | for (pp = &mp->ports; |
562 | (p = mlock_dereference(*pp, br)) != NULL; | |
563 | pp = &p->next) { | |
6db6f0ea | 564 | if (br_port_group_equal(p, port, src)) |
454594f3 | 565 | goto found; |
eb1d1641 HX |
566 | if ((unsigned long)p->port < (unsigned long)port) |
567 | break; | |
568 | } | |
569 | ||
6db6f0ea | 570 | p = br_multicast_new_port_group(port, group, *pp, 0, src); |
eb1d1641 HX |
571 | if (unlikely(!p)) |
572 | goto err; | |
eb1d1641 | 573 | rcu_assign_pointer(*pp, p); |
45ebcce5 | 574 | br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0); |
eb1d1641 | 575 | |
454594f3 LL |
576 | found: |
577 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
eb1d1641 HX |
578 | out: |
579 | err = 0; | |
580 | ||
581 | err: | |
582 | spin_unlock(&br->multicast_lock); | |
583 | return err; | |
584 | } | |
585 | ||
8ef2a9a5 YH |
586 | static int br_ip4_multicast_add_group(struct net_bridge *br, |
587 | struct net_bridge_port *port, | |
b0e9a30d | 588 | __be32 group, |
6db6f0ea FF |
589 | __u16 vid, |
590 | const unsigned char *src) | |
8ef2a9a5 YH |
591 | { |
592 | struct br_ip br_group; | |
593 | ||
594 | if (ipv4_is_local_multicast(group)) | |
595 | return 0; | |
596 | ||
1515a63f | 597 | memset(&br_group, 0, sizeof(br_group)); |
8ef2a9a5 YH |
598 | br_group.u.ip4 = group; |
599 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 600 | br_group.vid = vid; |
8ef2a9a5 | 601 | |
6db6f0ea | 602 | return br_multicast_add_group(br, port, &br_group, src); |
8ef2a9a5 YH |
603 | } |
604 | ||
dfd56b8b | 605 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
606 | static int br_ip6_multicast_add_group(struct net_bridge *br, |
607 | struct net_bridge_port *port, | |
b0e9a30d | 608 | const struct in6_addr *group, |
6db6f0ea FF |
609 | __u16 vid, |
610 | const unsigned char *src) | |
08b202b6 YH |
611 | { |
612 | struct br_ip br_group; | |
613 | ||
3c3769e6 | 614 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
615 | return 0; |
616 | ||
19e3a9c9 | 617 | memset(&br_group, 0, sizeof(br_group)); |
4e3fd7a0 | 618 | br_group.u.ip6 = *group; |
9cc6e0c4 | 619 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 620 | br_group.vid = vid; |
08b202b6 | 621 | |
6db6f0ea | 622 | return br_multicast_add_group(br, port, &br_group, src); |
08b202b6 YH |
623 | } |
624 | #endif | |
625 | ||
88c1f37f | 626 | static void br_multicast_router_expired(struct timer_list *t) |
eb1d1641 | 627 | { |
88c1f37f AP |
628 | struct net_bridge_port *port = |
629 | from_timer(port, t, multicast_router_timer); | |
eb1d1641 HX |
630 | struct net_bridge *br = port->br; |
631 | ||
632 | spin_lock(&br->multicast_lock); | |
a55d8246 NA |
633 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
634 | port->multicast_router == MDB_RTR_TYPE_PERM || | |
f12e7d95 | 635 | timer_pending(&port->multicast_router_timer)) |
eb1d1641 HX |
636 | goto out; |
637 | ||
f12e7d95 | 638 | __del_port_router(port); |
eb1d1641 HX |
639 | out: |
640 | spin_unlock(&br->multicast_lock); | |
641 | } | |
642 | ||
77041420 YG |
643 | static void br_mc_router_state_change(struct net_bridge *p, |
644 | bool is_mc_router) | |
645 | { | |
646 | struct switchdev_attr attr = { | |
647 | .orig_dev = p->dev, | |
648 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER, | |
649 | .flags = SWITCHDEV_F_DEFER, | |
650 | .u.mrouter = is_mc_router, | |
651 | }; | |
652 | ||
653 | switchdev_port_attr_set(p->dev, &attr); | |
654 | } | |
655 | ||
88c1f37f | 656 | static void br_multicast_local_router_expired(struct timer_list *t) |
eb1d1641 | 657 | { |
88c1f37f | 658 | struct net_bridge *br = from_timer(br, t, multicast_router_timer); |
77041420 YG |
659 | |
660 | spin_lock(&br->multicast_lock); | |
661 | if (br->multicast_router == MDB_RTR_TYPE_DISABLED || | |
662 | br->multicast_router == MDB_RTR_TYPE_PERM || | |
663 | timer_pending(&br->multicast_router_timer)) | |
664 | goto out; | |
665 | ||
666 | br_mc_router_state_change(br, false); | |
667 | out: | |
668 | spin_unlock(&br->multicast_lock); | |
eb1d1641 HX |
669 | } |
670 | ||
cc0fdd80 | 671 | static void br_multicast_querier_expired(struct net_bridge *br, |
90010b36 | 672 | struct bridge_mcast_own_query *query) |
c83b8fab | 673 | { |
c83b8fab | 674 | spin_lock(&br->multicast_lock); |
13cefad2 | 675 | if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
c83b8fab HX |
676 | goto out; |
677 | ||
cc0fdd80 | 678 | br_multicast_start_querier(br, query); |
c83b8fab HX |
679 | |
680 | out: | |
681 | spin_unlock(&br->multicast_lock); | |
682 | } | |
683 | ||
88c1f37f | 684 | static void br_ip4_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 685 | { |
88c1f37f | 686 | struct net_bridge *br = from_timer(br, t, ip4_other_query.timer); |
cc0fdd80 | 687 | |
90010b36 | 688 | br_multicast_querier_expired(br, &br->ip4_own_query); |
cc0fdd80 LL |
689 | } |
690 | ||
691 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 692 | static void br_ip6_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 693 | { |
88c1f37f | 694 | struct net_bridge *br = from_timer(br, t, ip6_other_query.timer); |
cc0fdd80 | 695 | |
90010b36 | 696 | br_multicast_querier_expired(br, &br->ip6_own_query); |
cc0fdd80 LL |
697 | } |
698 | #endif | |
699 | ||
dc4eb53a LL |
700 | static void br_multicast_select_own_querier(struct net_bridge *br, |
701 | struct br_ip *ip, | |
702 | struct sk_buff *skb) | |
703 | { | |
704 | if (ip->proto == htons(ETH_P_IP)) | |
705 | br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr; | |
706 | #if IS_ENABLED(CONFIG_IPV6) | |
707 | else | |
708 | br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr; | |
709 | #endif | |
710 | } | |
711 | ||
8ef2a9a5 YH |
712 | static void __br_multicast_send_query(struct net_bridge *br, |
713 | struct net_bridge_port *port, | |
714 | struct br_ip *ip) | |
eb1d1641 | 715 | { |
eb1d1641 | 716 | struct sk_buff *skb; |
1080ab95 | 717 | u8 igmp_type; |
eb1d1641 | 718 | |
1080ab95 | 719 | skb = br_multicast_alloc_query(br, ip, &igmp_type); |
eb1d1641 | 720 | if (!skb) |
8ef2a9a5 | 721 | return; |
eb1d1641 HX |
722 | |
723 | if (port) { | |
eb1d1641 | 724 | skb->dev = port->dev; |
a65056ec | 725 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 726 | BR_MCAST_DIR_TX); |
29a26a56 EB |
727 | NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, |
728 | dev_net(port->dev), NULL, skb, NULL, skb->dev, | |
f0b4eece | 729 | br_dev_queue_push_xmit); |
dc4eb53a LL |
730 | } else { |
731 | br_multicast_select_own_querier(br, ip, skb); | |
a65056ec | 732 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 733 | BR_MCAST_DIR_RX); |
eb1d1641 | 734 | netif_rx(skb); |
dc4eb53a | 735 | } |
8ef2a9a5 YH |
736 | } |
737 | ||
738 | static void br_multicast_send_query(struct net_bridge *br, | |
cc0fdd80 | 739 | struct net_bridge_port *port, |
90010b36 | 740 | struct bridge_mcast_own_query *own_query) |
8ef2a9a5 | 741 | { |
90010b36 | 742 | struct bridge_mcast_other_query *other_query = NULL; |
5e923585 NA |
743 | struct br_ip br_group; |
744 | unsigned long time; | |
8ef2a9a5 | 745 | |
13cefad2 NA |
746 | if (!netif_running(br->dev) || |
747 | !br_opt_get(br, BROPT_MULTICAST_ENABLED) || | |
675779ad | 748 | !br_opt_get(br, BROPT_MULTICAST_QUERIER)) |
8ef2a9a5 YH |
749 | return; |
750 | ||
08b202b6 YH |
751 | memset(&br_group.u, 0, sizeof(br_group.u)); |
752 | ||
90010b36 LL |
753 | if (port ? (own_query == &port->ip4_own_query) : |
754 | (own_query == &br->ip4_own_query)) { | |
755 | other_query = &br->ip4_other_query; | |
cc0fdd80 | 756 | br_group.proto = htons(ETH_P_IP); |
dfd56b8b | 757 | #if IS_ENABLED(CONFIG_IPV6) |
cc0fdd80 | 758 | } else { |
90010b36 | 759 | other_query = &br->ip6_other_query; |
cc0fdd80 | 760 | br_group.proto = htons(ETH_P_IPV6); |
08b202b6 | 761 | #endif |
cc0fdd80 LL |
762 | } |
763 | ||
90010b36 | 764 | if (!other_query || timer_pending(&other_query->timer)) |
cc0fdd80 LL |
765 | return; |
766 | ||
767 | __br_multicast_send_query(br, port, &br_group); | |
eb1d1641 | 768 | |
eb1d1641 | 769 | time = jiffies; |
90010b36 | 770 | time += own_query->startup_sent < br->multicast_startup_query_count ? |
eb1d1641 HX |
771 | br->multicast_startup_query_interval : |
772 | br->multicast_query_interval; | |
90010b36 | 773 | mod_timer(&own_query->timer, time); |
eb1d1641 HX |
774 | } |
775 | ||
90010b36 LL |
776 | static void |
777 | br_multicast_port_query_expired(struct net_bridge_port *port, | |
778 | struct bridge_mcast_own_query *query) | |
eb1d1641 | 779 | { |
eb1d1641 HX |
780 | struct net_bridge *br = port->br; |
781 | ||
782 | spin_lock(&br->multicast_lock); | |
02a780c0 DC |
783 | if (port->state == BR_STATE_DISABLED || |
784 | port->state == BR_STATE_BLOCKING) | |
eb1d1641 HX |
785 | goto out; |
786 | ||
cc0fdd80 LL |
787 | if (query->startup_sent < br->multicast_startup_query_count) |
788 | query->startup_sent++; | |
eb1d1641 | 789 | |
cc0fdd80 | 790 | br_multicast_send_query(port->br, port, query); |
eb1d1641 HX |
791 | |
792 | out: | |
793 | spin_unlock(&br->multicast_lock); | |
794 | } | |
795 | ||
88c1f37f | 796 | static void br_ip4_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 797 | { |
88c1f37f | 798 | struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer); |
cc0fdd80 | 799 | |
90010b36 | 800 | br_multicast_port_query_expired(port, &port->ip4_own_query); |
cc0fdd80 LL |
801 | } |
802 | ||
803 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 804 | static void br_ip6_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 805 | { |
88c1f37f | 806 | struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer); |
cc0fdd80 | 807 | |
90010b36 | 808 | br_multicast_port_query_expired(port, &port->ip6_own_query); |
cc0fdd80 LL |
809 | } |
810 | #endif | |
811 | ||
147c1e9b NF |
812 | static void br_mc_disabled_update(struct net_device *dev, bool value) |
813 | { | |
814 | struct switchdev_attr attr = { | |
815 | .orig_dev = dev, | |
816 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED, | |
817 | .flags = SWITCHDEV_F_DEFER, | |
13cefad2 | 818 | .u.mc_disabled = !value, |
147c1e9b NF |
819 | }; |
820 | ||
821 | switchdev_port_attr_set(dev, &attr); | |
822 | } | |
823 | ||
1080ab95 | 824 | int br_multicast_add_port(struct net_bridge_port *port) |
eb1d1641 | 825 | { |
7f0aec7a | 826 | port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
eb1d1641 | 827 | |
88c1f37f AP |
828 | timer_setup(&port->multicast_router_timer, |
829 | br_multicast_router_expired, 0); | |
830 | timer_setup(&port->ip4_own_query.timer, | |
831 | br_ip4_multicast_port_query_expired, 0); | |
cc0fdd80 | 832 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f AP |
833 | timer_setup(&port->ip6_own_query.timer, |
834 | br_ip6_multicast_port_query_expired, 0); | |
cc0fdd80 | 835 | #endif |
13cefad2 NA |
836 | br_mc_disabled_update(port->dev, |
837 | br_opt_get(port->br, BROPT_MULTICAST_ENABLED)); | |
147c1e9b | 838 | |
1080ab95 NA |
839 | port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); |
840 | if (!port->mcast_stats) | |
841 | return -ENOMEM; | |
842 | ||
843 | return 0; | |
eb1d1641 HX |
844 | } |
845 | ||
846 | void br_multicast_del_port(struct net_bridge_port *port) | |
847 | { | |
e10177ab SA |
848 | struct net_bridge *br = port->br; |
849 | struct net_bridge_port_group *pg; | |
850 | struct hlist_node *n; | |
851 | ||
852 | /* Take care of the remaining groups, only perm ones should be left */ | |
853 | spin_lock_bh(&br->multicast_lock); | |
854 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) | |
855 | br_multicast_del_pg(br, pg); | |
856 | spin_unlock_bh(&br->multicast_lock); | |
eb1d1641 | 857 | del_timer_sync(&port->multicast_router_timer); |
1080ab95 | 858 | free_percpu(port->mcast_stats); |
eb1d1641 HX |
859 | } |
860 | ||
90010b36 | 861 | static void br_multicast_enable(struct bridge_mcast_own_query *query) |
561f1103 | 862 | { |
cc0fdd80 | 863 | query->startup_sent = 0; |
561f1103 | 864 | |
cc0fdd80 LL |
865 | if (try_to_del_timer_sync(&query->timer) >= 0 || |
866 | del_timer(&query->timer)) | |
867 | mod_timer(&query->timer, jiffies); | |
561f1103 HX |
868 | } |
869 | ||
7cb3f921 | 870 | static void __br_multicast_enable_port(struct net_bridge_port *port) |
eb1d1641 HX |
871 | { |
872 | struct net_bridge *br = port->br; | |
873 | ||
13cefad2 | 874 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev)) |
7cb3f921 | 875 | return; |
eb1d1641 | 876 | |
90010b36 | 877 | br_multicast_enable(&port->ip4_own_query); |
cc0fdd80 | 878 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 879 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 880 | #endif |
7f0aec7a NA |
881 | if (port->multicast_router == MDB_RTR_TYPE_PERM && |
882 | hlist_unhashed(&port->rlist)) | |
754bc547 | 883 | br_multicast_add_router(br, port); |
7cb3f921 | 884 | } |
eb1d1641 | 885 | |
7cb3f921 NA |
886 | void br_multicast_enable_port(struct net_bridge_port *port) |
887 | { | |
888 | struct net_bridge *br = port->br; | |
889 | ||
890 | spin_lock(&br->multicast_lock); | |
891 | __br_multicast_enable_port(port); | |
eb1d1641 HX |
892 | spin_unlock(&br->multicast_lock); |
893 | } | |
894 | ||
895 | void br_multicast_disable_port(struct net_bridge_port *port) | |
896 | { | |
897 | struct net_bridge *br = port->br; | |
898 | struct net_bridge_port_group *pg; | |
b67bfe0d | 899 | struct hlist_node *n; |
eb1d1641 HX |
900 | |
901 | spin_lock(&br->multicast_lock); | |
b67bfe0d | 902 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) |
9d06b6d8 | 903 | if (!(pg->flags & MDB_PG_FLAGS_PERMANENT)) |
e10177ab | 904 | br_multicast_del_pg(br, pg); |
eb1d1641 | 905 | |
f12e7d95 NF |
906 | __del_port_router(port); |
907 | ||
eb1d1641 | 908 | del_timer(&port->multicast_router_timer); |
90010b36 | 909 | del_timer(&port->ip4_own_query.timer); |
cc0fdd80 | 910 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 911 | del_timer(&port->ip6_own_query.timer); |
cc0fdd80 | 912 | #endif |
eb1d1641 HX |
913 | spin_unlock(&br->multicast_lock); |
914 | } | |
915 | ||
8ef2a9a5 YH |
916 | static int br_ip4_multicast_igmp3_report(struct net_bridge *br, |
917 | struct net_bridge_port *port, | |
06499098 VY |
918 | struct sk_buff *skb, |
919 | u16 vid) | |
eb1d1641 | 920 | { |
6db6f0ea | 921 | const unsigned char *src; |
eb1d1641 HX |
922 | struct igmpv3_report *ih; |
923 | struct igmpv3_grec *grec; | |
924 | int i; | |
925 | int len; | |
926 | int num; | |
927 | int type; | |
928 | int err = 0; | |
929 | __be32 group; | |
e57f6185 | 930 | u16 nsrcs; |
eb1d1641 | 931 | |
eb1d1641 HX |
932 | ih = igmpv3_report_hdr(skb); |
933 | num = ntohs(ih->ngrec); | |
c2d4fbd2 | 934 | len = skb_transport_offset(skb) + sizeof(*ih); |
eb1d1641 HX |
935 | |
936 | for (i = 0; i < num; i++) { | |
937 | len += sizeof(*grec); | |
ba5ea614 | 938 | if (!ip_mc_may_pull(skb, len)) |
eb1d1641 HX |
939 | return -EINVAL; |
940 | ||
fd218cf9 | 941 | grec = (void *)(skb->data + len - sizeof(*grec)); |
eb1d1641 HX |
942 | group = grec->grec_mca; |
943 | type = grec->grec_type; | |
e57f6185 | 944 | nsrcs = ntohs(grec->grec_nsrcs); |
eb1d1641 | 945 | |
e57f6185 | 946 | len += nsrcs * 4; |
ba5ea614 | 947 | if (!ip_mc_may_pull(skb, len)) |
eb1d1641 HX |
948 | return -EINVAL; |
949 | ||
950 | /* We treat this as an IGMPv2 report for now. */ | |
951 | switch (type) { | |
952 | case IGMPV3_MODE_IS_INCLUDE: | |
953 | case IGMPV3_MODE_IS_EXCLUDE: | |
954 | case IGMPV3_CHANGE_TO_INCLUDE: | |
955 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
956 | case IGMPV3_ALLOW_NEW_SOURCES: | |
957 | case IGMPV3_BLOCK_OLD_SOURCES: | |
958 | break; | |
959 | ||
960 | default: | |
961 | continue; | |
962 | } | |
963 | ||
6db6f0ea | 964 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
965 | if ((type == IGMPV3_CHANGE_TO_INCLUDE || |
966 | type == IGMPV3_MODE_IS_INCLUDE) && | |
e57f6185 | 967 | nsrcs == 0) { |
6db6f0ea | 968 | br_ip4_multicast_leave_group(br, port, group, vid, src); |
bc8c20ac | 969 | } else { |
6db6f0ea FF |
970 | err = br_ip4_multicast_add_group(br, port, group, vid, |
971 | src); | |
bc8c20ac SA |
972 | if (err) |
973 | break; | |
974 | } | |
eb1d1641 HX |
975 | } |
976 | ||
977 | return err; | |
978 | } | |
979 | ||
dfd56b8b | 980 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
981 | static int br_ip6_multicast_mld2_report(struct net_bridge *br, |
982 | struct net_bridge_port *port, | |
06499098 VY |
983 | struct sk_buff *skb, |
984 | u16 vid) | |
08b202b6 | 985 | { |
ba5ea614 | 986 | unsigned int nsrcs_offset; |
6db6f0ea | 987 | const unsigned char *src; |
08b202b6 YH |
988 | struct icmp6hdr *icmp6h; |
989 | struct mld2_grec *grec; | |
ba5ea614 | 990 | unsigned int grec_len; |
08b202b6 YH |
991 | int i; |
992 | int len; | |
993 | int num; | |
994 | int err = 0; | |
995 | ||
ba5ea614 | 996 | if (!ipv6_mc_may_pull(skb, sizeof(*icmp6h))) |
08b202b6 YH |
997 | return -EINVAL; |
998 | ||
999 | icmp6h = icmp6_hdr(skb); | |
1000 | num = ntohs(icmp6h->icmp6_dataun.un_data16[1]); | |
c2d4fbd2 | 1001 | len = skb_transport_offset(skb) + sizeof(*icmp6h); |
08b202b6 YH |
1002 | |
1003 | for (i = 0; i < num; i++) { | |
e57f6185 NA |
1004 | __be16 *_nsrcs, __nsrcs; |
1005 | u16 nsrcs; | |
08b202b6 | 1006 | |
ba5ea614 LL |
1007 | nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs); |
1008 | ||
1009 | if (skb_transport_offset(skb) + ipv6_transport_len(skb) < | |
1010 | nsrcs_offset + sizeof(_nsrcs)) | |
1011 | return -EINVAL; | |
1012 | ||
e57f6185 NA |
1013 | _nsrcs = skb_header_pointer(skb, nsrcs_offset, |
1014 | sizeof(__nsrcs), &__nsrcs); | |
1015 | if (!_nsrcs) | |
08b202b6 YH |
1016 | return -EINVAL; |
1017 | ||
e57f6185 NA |
1018 | nsrcs = ntohs(*_nsrcs); |
1019 | grec_len = struct_size(grec, grec_src, nsrcs); | |
ba5ea614 LL |
1020 | |
1021 | if (!ipv6_mc_may_pull(skb, len + grec_len)) | |
08b202b6 YH |
1022 | return -EINVAL; |
1023 | ||
1024 | grec = (struct mld2_grec *)(skb->data + len); | |
ba5ea614 | 1025 | len += grec_len; |
08b202b6 YH |
1026 | |
1027 | /* We treat these as MLDv1 reports for now. */ | |
1028 | switch (grec->grec_type) { | |
1029 | case MLD2_MODE_IS_INCLUDE: | |
1030 | case MLD2_MODE_IS_EXCLUDE: | |
1031 | case MLD2_CHANGE_TO_INCLUDE: | |
1032 | case MLD2_CHANGE_TO_EXCLUDE: | |
1033 | case MLD2_ALLOW_NEW_SOURCES: | |
1034 | case MLD2_BLOCK_OLD_SOURCES: | |
1035 | break; | |
1036 | ||
1037 | default: | |
1038 | continue; | |
1039 | } | |
1040 | ||
6db6f0ea | 1041 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
1042 | if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE || |
1043 | grec->grec_type == MLD2_MODE_IS_INCLUDE) && | |
e57f6185 | 1044 | nsrcs == 0) { |
bc8c20ac | 1045 | br_ip6_multicast_leave_group(br, port, &grec->grec_mca, |
6db6f0ea | 1046 | vid, src); |
bc8c20ac SA |
1047 | } else { |
1048 | err = br_ip6_multicast_add_group(br, port, | |
6db6f0ea FF |
1049 | &grec->grec_mca, vid, |
1050 | src); | |
9264251e | 1051 | if (err) |
bc8c20ac SA |
1052 | break; |
1053 | } | |
08b202b6 YH |
1054 | } |
1055 | ||
1056 | return err; | |
1057 | } | |
1058 | #endif | |
1059 | ||
dc4eb53a | 1060 | static bool br_ip4_multicast_select_querier(struct net_bridge *br, |
2cd41431 | 1061 | struct net_bridge_port *port, |
dc4eb53a LL |
1062 | __be32 saddr) |
1063 | { | |
1064 | if (!timer_pending(&br->ip4_own_query.timer) && | |
1065 | !timer_pending(&br->ip4_other_query.timer)) | |
1066 | goto update; | |
1067 | ||
1068 | if (!br->ip4_querier.addr.u.ip4) | |
1069 | goto update; | |
1070 | ||
1071 | if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4)) | |
1072 | goto update; | |
1073 | ||
1074 | return false; | |
1075 | ||
1076 | update: | |
1077 | br->ip4_querier.addr.u.ip4 = saddr; | |
1078 | ||
2cd41431 LL |
1079 | /* update protected by general multicast_lock by caller */ |
1080 | rcu_assign_pointer(br->ip4_querier.port, port); | |
1081 | ||
dc4eb53a LL |
1082 | return true; |
1083 | } | |
1084 | ||
1085 | #if IS_ENABLED(CONFIG_IPV6) | |
1086 | static bool br_ip6_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1087 | struct net_bridge_port *port, |
dc4eb53a LL |
1088 | struct in6_addr *saddr) |
1089 | { | |
1090 | if (!timer_pending(&br->ip6_own_query.timer) && | |
1091 | !timer_pending(&br->ip6_other_query.timer)) | |
1092 | goto update; | |
1093 | ||
1094 | if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0) | |
1095 | goto update; | |
1096 | ||
1097 | return false; | |
1098 | ||
1099 | update: | |
1100 | br->ip6_querier.addr.u.ip6 = *saddr; | |
1101 | ||
2cd41431 LL |
1102 | /* update protected by general multicast_lock by caller */ |
1103 | rcu_assign_pointer(br->ip6_querier.port, port); | |
1104 | ||
dc4eb53a LL |
1105 | return true; |
1106 | } | |
1107 | #endif | |
1108 | ||
1109 | static bool br_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1110 | struct net_bridge_port *port, |
dc4eb53a LL |
1111 | struct br_ip *saddr) |
1112 | { | |
1113 | switch (saddr->proto) { | |
1114 | case htons(ETH_P_IP): | |
2cd41431 | 1115 | return br_ip4_multicast_select_querier(br, port, saddr->u.ip4); |
dc4eb53a LL |
1116 | #if IS_ENABLED(CONFIG_IPV6) |
1117 | case htons(ETH_P_IPV6): | |
2cd41431 | 1118 | return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6); |
dc4eb53a LL |
1119 | #endif |
1120 | } | |
1121 | ||
1122 | return false; | |
1123 | } | |
1124 | ||
cc0fdd80 | 1125 | static void |
90010b36 LL |
1126 | br_multicast_update_query_timer(struct net_bridge *br, |
1127 | struct bridge_mcast_other_query *query, | |
1128 | unsigned long max_delay) | |
b00589af | 1129 | { |
90010b36 LL |
1130 | if (!timer_pending(&query->timer)) |
1131 | query->delay_time = jiffies + max_delay; | |
b00589af | 1132 | |
90010b36 | 1133 | mod_timer(&query->timer, jiffies + br->multicast_querier_interval); |
b00589af LL |
1134 | } |
1135 | ||
6d549648 NF |
1136 | static void br_port_mc_router_state_change(struct net_bridge_port *p, |
1137 | bool is_mc_router) | |
1138 | { | |
1139 | struct switchdev_attr attr = { | |
1140 | .orig_dev = p->dev, | |
1141 | .id = SWITCHDEV_ATTR_ID_PORT_MROUTER, | |
1142 | .flags = SWITCHDEV_F_DEFER, | |
1143 | .u.mrouter = is_mc_router, | |
1144 | }; | |
1145 | ||
1146 | switchdev_port_attr_set(p->dev, &attr); | |
1147 | } | |
1148 | ||
7e80c124 | 1149 | /* |
7c77602f | 1150 | * Add port to router_list |
7e80c124 | 1151 | * list is maintained ordered by pointer value |
1152 | * and locked by br->multicast_lock and RCU | |
1153 | */ | |
0909e117 HX |
1154 | static void br_multicast_add_router(struct net_bridge *br, |
1155 | struct net_bridge_port *port) | |
1156 | { | |
dcdca2c4 | 1157 | struct net_bridge_port *p; |
b67bfe0d | 1158 | struct hlist_node *slot = NULL; |
dcdca2c4 | 1159 | |
1a040eac NA |
1160 | if (!hlist_unhashed(&port->rlist)) |
1161 | return; | |
1162 | ||
b67bfe0d | 1163 | hlist_for_each_entry(p, &br->router_list, rlist) { |
7e80c124 | 1164 | if ((unsigned long) port >= (unsigned long) p) |
1165 | break; | |
b67bfe0d | 1166 | slot = &p->rlist; |
dcdca2c4 | 1167 | } |
1168 | ||
7e80c124 | 1169 | if (slot) |
1d023284 | 1170 | hlist_add_behind_rcu(&port->rlist, slot); |
dcdca2c4 | 1171 | else |
1172 | hlist_add_head_rcu(&port->rlist, &br->router_list); | |
949f1e39 | 1173 | br_rtr_notify(br->dev, port, RTM_NEWMDB); |
6d549648 | 1174 | br_port_mc_router_state_change(port, true); |
0909e117 HX |
1175 | } |
1176 | ||
eb1d1641 HX |
1177 | static void br_multicast_mark_router(struct net_bridge *br, |
1178 | struct net_bridge_port *port) | |
1179 | { | |
1180 | unsigned long now = jiffies; | |
eb1d1641 HX |
1181 | |
1182 | if (!port) { | |
77041420 YG |
1183 | if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) { |
1184 | if (!timer_pending(&br->multicast_router_timer)) | |
1185 | br_mc_router_state_change(br, true); | |
eb1d1641 HX |
1186 | mod_timer(&br->multicast_router_timer, |
1187 | now + br->multicast_querier_interval); | |
77041420 | 1188 | } |
eb1d1641 HX |
1189 | return; |
1190 | } | |
1191 | ||
a55d8246 NA |
1192 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
1193 | port->multicast_router == MDB_RTR_TYPE_PERM) | |
eb1d1641 HX |
1194 | return; |
1195 | ||
0909e117 | 1196 | br_multicast_add_router(br, port); |
eb1d1641 | 1197 | |
eb1d1641 HX |
1198 | mod_timer(&port->multicast_router_timer, |
1199 | now + br->multicast_querier_interval); | |
1200 | } | |
1201 | ||
1202 | static void br_multicast_query_received(struct net_bridge *br, | |
1203 | struct net_bridge_port *port, | |
90010b36 | 1204 | struct bridge_mcast_other_query *query, |
dc4eb53a | 1205 | struct br_ip *saddr, |
b00589af | 1206 | unsigned long max_delay) |
eb1d1641 | 1207 | { |
2cd41431 | 1208 | if (!br_multicast_select_querier(br, port, saddr)) |
eb1d1641 HX |
1209 | return; |
1210 | ||
dc4eb53a | 1211 | br_multicast_update_query_timer(br, query, max_delay); |
278e2148 | 1212 | br_multicast_mark_router(br, port); |
eb1d1641 HX |
1213 | } |
1214 | ||
9c2e955c | 1215 | static void br_ip4_multicast_query(struct net_bridge *br, |
1216 | struct net_bridge_port *port, | |
1217 | struct sk_buff *skb, | |
1218 | u16 vid) | |
eb1d1641 | 1219 | { |
ba5ea614 | 1220 | unsigned int transport_len = ip_transport_len(skb); |
b71d1d42 | 1221 | const struct iphdr *iph = ip_hdr(skb); |
eb1d1641 HX |
1222 | struct igmphdr *ih = igmp_hdr(skb); |
1223 | struct net_bridge_mdb_entry *mp; | |
1224 | struct igmpv3_query *ih3; | |
1225 | struct net_bridge_port_group *p; | |
e8051688 | 1226 | struct net_bridge_port_group __rcu **pp; |
dc4eb53a | 1227 | struct br_ip saddr; |
eb1d1641 HX |
1228 | unsigned long max_delay; |
1229 | unsigned long now = jiffies; | |
1230 | __be32 group; | |
1231 | ||
1232 | spin_lock(&br->multicast_lock); | |
1233 | if (!netif_running(br->dev) || | |
1234 | (port && port->state == BR_STATE_DISABLED)) | |
1235 | goto out; | |
1236 | ||
eb1d1641 HX |
1237 | group = ih->group; |
1238 | ||
ba5ea614 | 1239 | if (transport_len == sizeof(*ih)) { |
eb1d1641 HX |
1240 | max_delay = ih->code * (HZ / IGMP_TIMER_SCALE); |
1241 | ||
1242 | if (!max_delay) { | |
1243 | max_delay = 10 * HZ; | |
1244 | group = 0; | |
1245 | } | |
ba5ea614 | 1246 | } else if (transport_len >= sizeof(*ih3)) { |
eb1d1641 HX |
1247 | ih3 = igmpv3_query_hdr(skb); |
1248 | if (ih3->nsrcs) | |
bec68ff1 | 1249 | goto out; |
eb1d1641 | 1250 | |
0ba8c9ec YH |
1251 | max_delay = ih3->code ? |
1252 | IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1; | |
9afd85c9 | 1253 | } else { |
9ed973cc LL |
1254 | goto out; |
1255 | } | |
1256 | ||
dc4eb53a LL |
1257 | if (!group) { |
1258 | saddr.proto = htons(ETH_P_IP); | |
1259 | saddr.u.ip4 = iph->saddr; | |
b00589af | 1260 | |
dc4eb53a LL |
1261 | br_multicast_query_received(br, port, &br->ip4_other_query, |
1262 | &saddr, max_delay); | |
eb1d1641 | 1263 | goto out; |
dc4eb53a | 1264 | } |
eb1d1641 | 1265 | |
19e3a9c9 | 1266 | mp = br_mdb_ip4_get(br, group, vid); |
eb1d1641 HX |
1267 | if (!mp) |
1268 | goto out; | |
1269 | ||
1270 | max_delay *= br->multicast_last_member_count; | |
1271 | ||
ff0fd34e | 1272 | if (mp->host_joined && |
eb1d1641 HX |
1273 | (timer_pending(&mp->timer) ? |
1274 | time_after(mp->timer.expires, now + max_delay) : | |
1275 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1276 | mod_timer(&mp->timer, now + max_delay); | |
1277 | ||
e8051688 ED |
1278 | for (pp = &mp->ports; |
1279 | (p = mlock_dereference(*pp, br)) != NULL; | |
1280 | pp = &p->next) { | |
eb1d1641 HX |
1281 | if (timer_pending(&p->timer) ? |
1282 | time_after(p->timer.expires, now + max_delay) : | |
1283 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1284 | mod_timer(&p->timer, now + max_delay); |
eb1d1641 HX |
1285 | } |
1286 | ||
1287 | out: | |
1288 | spin_unlock(&br->multicast_lock); | |
eb1d1641 HX |
1289 | } |
1290 | ||
dfd56b8b | 1291 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1292 | static int br_ip6_multicast_query(struct net_bridge *br, |
1293 | struct net_bridge_port *port, | |
06499098 VY |
1294 | struct sk_buff *skb, |
1295 | u16 vid) | |
08b202b6 | 1296 | { |
ba5ea614 | 1297 | unsigned int transport_len = ipv6_transport_len(skb); |
eca2a43b | 1298 | struct mld_msg *mld; |
08b202b6 YH |
1299 | struct net_bridge_mdb_entry *mp; |
1300 | struct mld2_query *mld2q; | |
e8051688 ED |
1301 | struct net_bridge_port_group *p; |
1302 | struct net_bridge_port_group __rcu **pp; | |
dc4eb53a | 1303 | struct br_ip saddr; |
08b202b6 YH |
1304 | unsigned long max_delay; |
1305 | unsigned long now = jiffies; | |
856ce5d0 | 1306 | unsigned int offset = skb_transport_offset(skb); |
b71d1d42 | 1307 | const struct in6_addr *group = NULL; |
9ed973cc | 1308 | bool is_general_query; |
08b202b6 YH |
1309 | int err = 0; |
1310 | ||
1311 | spin_lock(&br->multicast_lock); | |
1312 | if (!netif_running(br->dev) || | |
1313 | (port && port->state == BR_STATE_DISABLED)) | |
1314 | goto out; | |
1315 | ||
ba5ea614 | 1316 | if (transport_len == sizeof(*mld)) { |
856ce5d0 | 1317 | if (!pskb_may_pull(skb, offset + sizeof(*mld))) { |
08b202b6 YH |
1318 | err = -EINVAL; |
1319 | goto out; | |
1320 | } | |
1321 | mld = (struct mld_msg *) icmp6_hdr(skb); | |
4715213d | 1322 | max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay)); |
08b202b6 YH |
1323 | if (max_delay) |
1324 | group = &mld->mld_mca; | |
248ba8ec | 1325 | } else { |
856ce5d0 | 1326 | if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) { |
08b202b6 YH |
1327 | err = -EINVAL; |
1328 | goto out; | |
1329 | } | |
1330 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
1331 | if (!mld2q->mld2q_nsrcs) | |
1332 | group = &mld2q->mld2q_mca; | |
e3f5b170 DB |
1333 | |
1334 | max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL); | |
08b202b6 YH |
1335 | } |
1336 | ||
9ed973cc LL |
1337 | is_general_query = group && ipv6_addr_any(group); |
1338 | ||
dc4eb53a LL |
1339 | if (is_general_query) { |
1340 | saddr.proto = htons(ETH_P_IPV6); | |
3b26a5d0 | 1341 | saddr.u.ip6 = ipv6_hdr(skb)->saddr; |
b00589af | 1342 | |
dc4eb53a LL |
1343 | br_multicast_query_received(br, port, &br->ip6_other_query, |
1344 | &saddr, max_delay); | |
08b202b6 | 1345 | goto out; |
6c03ee8b LL |
1346 | } else if (!group) { |
1347 | goto out; | |
dc4eb53a | 1348 | } |
08b202b6 | 1349 | |
19e3a9c9 | 1350 | mp = br_mdb_ip6_get(br, group, vid); |
08b202b6 YH |
1351 | if (!mp) |
1352 | goto out; | |
1353 | ||
1354 | max_delay *= br->multicast_last_member_count; | |
ff0fd34e | 1355 | if (mp->host_joined && |
08b202b6 YH |
1356 | (timer_pending(&mp->timer) ? |
1357 | time_after(mp->timer.expires, now + max_delay) : | |
1358 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1359 | mod_timer(&mp->timer, now + max_delay); | |
1360 | ||
e8051688 ED |
1361 | for (pp = &mp->ports; |
1362 | (p = mlock_dereference(*pp, br)) != NULL; | |
1363 | pp = &p->next) { | |
08b202b6 YH |
1364 | if (timer_pending(&p->timer) ? |
1365 | time_after(p->timer.expires, now + max_delay) : | |
1366 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1367 | mod_timer(&p->timer, now + max_delay); |
08b202b6 YH |
1368 | } |
1369 | ||
1370 | out: | |
1371 | spin_unlock(&br->multicast_lock); | |
1372 | return err; | |
1373 | } | |
1374 | #endif | |
1375 | ||
90010b36 LL |
1376 | static void |
1377 | br_multicast_leave_group(struct net_bridge *br, | |
1378 | struct net_bridge_port *port, | |
1379 | struct br_ip *group, | |
1380 | struct bridge_mcast_other_query *other_query, | |
6db6f0ea FF |
1381 | struct bridge_mcast_own_query *own_query, |
1382 | const unsigned char *src) | |
eb1d1641 | 1383 | { |
eb1d1641 HX |
1384 | struct net_bridge_mdb_entry *mp; |
1385 | struct net_bridge_port_group *p; | |
1386 | unsigned long now; | |
1387 | unsigned long time; | |
1388 | ||
eb1d1641 HX |
1389 | spin_lock(&br->multicast_lock); |
1390 | if (!netif_running(br->dev) || | |
544586f7 | 1391 | (port && port->state == BR_STATE_DISABLED)) |
eb1d1641 HX |
1392 | goto out; |
1393 | ||
19e3a9c9 | 1394 | mp = br_mdb_ip_get(br, group); |
eb1d1641 HX |
1395 | if (!mp) |
1396 | goto out; | |
1397 | ||
544586f7 SA |
1398 | if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) { |
1399 | struct net_bridge_port_group __rcu **pp; | |
1400 | ||
1401 | for (pp = &mp->ports; | |
1402 | (p = mlock_dereference(*pp, br)) != NULL; | |
1403 | pp = &p->next) { | |
6db6f0ea | 1404 | if (!br_port_group_equal(p, port, src)) |
544586f7 SA |
1405 | continue; |
1406 | ||
5c725b6b NA |
1407 | if (p->flags & MDB_PG_FLAGS_PERMANENT) |
1408 | break; | |
1409 | ||
544586f7 SA |
1410 | rcu_assign_pointer(*pp, p->next); |
1411 | hlist_del_init(&p->mglist); | |
1412 | del_timer(&p->timer); | |
4329596c | 1413 | kfree_rcu(p, rcu); |
45ebcce5 | 1414 | br_mdb_notify(br->dev, port, group, RTM_DELMDB, |
3247b272 | 1415 | p->flags | MDB_PG_FLAGS_FAST_LEAVE); |
544586f7 | 1416 | |
ff0fd34e | 1417 | if (!mp->ports && !mp->host_joined && |
544586f7 SA |
1418 | netif_running(br->dev)) |
1419 | mod_timer(&mp->timer, jiffies); | |
1420 | } | |
1421 | goto out; | |
1422 | } | |
1423 | ||
1424 | if (timer_pending(&other_query->timer)) | |
1425 | goto out; | |
1426 | ||
675779ad | 1427 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { |
6b7df111 CW |
1428 | __br_multicast_send_query(br, port, &mp->addr); |
1429 | ||
1430 | time = jiffies + br->multicast_last_member_count * | |
1431 | br->multicast_last_member_interval; | |
cc0fdd80 | 1432 | |
90010b36 | 1433 | mod_timer(&own_query->timer, time); |
6b7df111 CW |
1434 | |
1435 | for (p = mlock_dereference(mp->ports, br); | |
1436 | p != NULL; | |
1437 | p = mlock_dereference(p->next, br)) { | |
6db6f0ea | 1438 | if (!br_port_group_equal(p, port, src)) |
6b7df111 CW |
1439 | continue; |
1440 | ||
1441 | if (!hlist_unhashed(&p->mglist) && | |
1442 | (timer_pending(&p->timer) ? | |
1443 | time_after(p->timer.expires, time) : | |
1444 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1445 | mod_timer(&p->timer, time); | |
1446 | } | |
1447 | ||
1448 | break; | |
1449 | } | |
1450 | } | |
1451 | ||
eb1d1641 HX |
1452 | now = jiffies; |
1453 | time = now + br->multicast_last_member_count * | |
1454 | br->multicast_last_member_interval; | |
1455 | ||
1456 | if (!port) { | |
ff0fd34e | 1457 | if (mp->host_joined && |
eb1d1641 HX |
1458 | (timer_pending(&mp->timer) ? |
1459 | time_after(mp->timer.expires, time) : | |
1460 | try_to_del_timer_sync(&mp->timer) >= 0)) { | |
1461 | mod_timer(&mp->timer, time); | |
eb1d1641 | 1462 | } |
454594f3 LL |
1463 | |
1464 | goto out; | |
1465 | } | |
1466 | ||
1467 | for (p = mlock_dereference(mp->ports, br); | |
1468 | p != NULL; | |
1469 | p = mlock_dereference(p->next, br)) { | |
1470 | if (p->port != port) | |
1471 | continue; | |
1472 | ||
1473 | if (!hlist_unhashed(&p->mglist) && | |
1474 | (timer_pending(&p->timer) ? | |
1475 | time_after(p->timer.expires, time) : | |
1476 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1477 | mod_timer(&p->timer, time); | |
1478 | } | |
1479 | ||
1480 | break; | |
eb1d1641 | 1481 | } |
eb1d1641 HX |
1482 | out: |
1483 | spin_unlock(&br->multicast_lock); | |
1484 | } | |
1485 | ||
8ef2a9a5 YH |
1486 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
1487 | struct net_bridge_port *port, | |
b0e9a30d | 1488 | __be32 group, |
6db6f0ea FF |
1489 | __u16 vid, |
1490 | const unsigned char *src) | |
8ef2a9a5 YH |
1491 | { |
1492 | struct br_ip br_group; | |
90010b36 | 1493 | struct bridge_mcast_own_query *own_query; |
8ef2a9a5 YH |
1494 | |
1495 | if (ipv4_is_local_multicast(group)) | |
1496 | return; | |
1497 | ||
90010b36 LL |
1498 | own_query = port ? &port->ip4_own_query : &br->ip4_own_query; |
1499 | ||
1515a63f | 1500 | memset(&br_group, 0, sizeof(br_group)); |
8ef2a9a5 YH |
1501 | br_group.u.ip4 = group; |
1502 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 1503 | br_group.vid = vid; |
8ef2a9a5 | 1504 | |
90010b36 | 1505 | br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query, |
6db6f0ea | 1506 | own_query, src); |
8ef2a9a5 YH |
1507 | } |
1508 | ||
dfd56b8b | 1509 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1510 | static void br_ip6_multicast_leave_group(struct net_bridge *br, |
1511 | struct net_bridge_port *port, | |
b0e9a30d | 1512 | const struct in6_addr *group, |
6db6f0ea FF |
1513 | __u16 vid, |
1514 | const unsigned char *src) | |
08b202b6 YH |
1515 | { |
1516 | struct br_ip br_group; | |
90010b36 | 1517 | struct bridge_mcast_own_query *own_query; |
08b202b6 | 1518 | |
3c3769e6 | 1519 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
1520 | return; |
1521 | ||
90010b36 LL |
1522 | own_query = port ? &port->ip6_own_query : &br->ip6_own_query; |
1523 | ||
1515a63f | 1524 | memset(&br_group, 0, sizeof(br_group)); |
4e3fd7a0 | 1525 | br_group.u.ip6 = *group; |
08b202b6 | 1526 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 1527 | br_group.vid = vid; |
08b202b6 | 1528 | |
90010b36 | 1529 | br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query, |
6db6f0ea | 1530 | own_query, src); |
08b202b6 YH |
1531 | } |
1532 | #endif | |
8ef2a9a5 | 1533 | |
1080ab95 NA |
1534 | static void br_multicast_err_count(const struct net_bridge *br, |
1535 | const struct net_bridge_port *p, | |
1536 | __be16 proto) | |
1537 | { | |
1538 | struct bridge_mcast_stats __percpu *stats; | |
1539 | struct bridge_mcast_stats *pstats; | |
1540 | ||
675779ad | 1541 | if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) |
1080ab95 NA |
1542 | return; |
1543 | ||
1544 | if (p) | |
1545 | stats = p->mcast_stats; | |
1546 | else | |
1547 | stats = br->mcast_stats; | |
1548 | if (WARN_ON(!stats)) | |
1549 | return; | |
1550 | ||
1551 | pstats = this_cpu_ptr(stats); | |
1552 | ||
1553 | u64_stats_update_begin(&pstats->syncp); | |
1554 | switch (proto) { | |
1555 | case htons(ETH_P_IP): | |
1556 | pstats->mstats.igmp_parse_errors++; | |
1557 | break; | |
1558 | #if IS_ENABLED(CONFIG_IPV6) | |
1559 | case htons(ETH_P_IPV6): | |
1560 | pstats->mstats.mld_parse_errors++; | |
1561 | break; | |
1562 | #endif | |
1563 | } | |
1564 | u64_stats_update_end(&pstats->syncp); | |
1565 | } | |
1566 | ||
91b02d3d NA |
1567 | static void br_multicast_pim(struct net_bridge *br, |
1568 | struct net_bridge_port *port, | |
1569 | const struct sk_buff *skb) | |
1570 | { | |
1571 | unsigned int offset = skb_transport_offset(skb); | |
1572 | struct pimhdr *pimhdr, _pimhdr; | |
1573 | ||
1574 | pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr); | |
1575 | if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION || | |
1576 | pim_hdr_type(pimhdr) != PIM_TYPE_HELLO) | |
1577 | return; | |
1578 | ||
1579 | br_multicast_mark_router(br, port); | |
1580 | } | |
1581 | ||
4b3087c7 LL |
1582 | static int br_ip4_multicast_mrd_rcv(struct net_bridge *br, |
1583 | struct net_bridge_port *port, | |
1584 | struct sk_buff *skb) | |
1585 | { | |
1586 | if (ip_hdr(skb)->protocol != IPPROTO_IGMP || | |
1587 | igmp_hdr(skb)->type != IGMP_MRDISC_ADV) | |
1588 | return -ENOMSG; | |
1589 | ||
1590 | br_multicast_mark_router(br, port); | |
1591 | ||
1592 | return 0; | |
1593 | } | |
1594 | ||
eb1d1641 HX |
1595 | static int br_multicast_ipv4_rcv(struct net_bridge *br, |
1596 | struct net_bridge_port *port, | |
06499098 VY |
1597 | struct sk_buff *skb, |
1598 | u16 vid) | |
eb1d1641 | 1599 | { |
6db6f0ea | 1600 | const unsigned char *src; |
eb1d1641 | 1601 | struct igmphdr *ih; |
eb1d1641 HX |
1602 | int err; |
1603 | ||
ba5ea614 | 1604 | err = ip_mc_check_igmp(skb); |
eb1d1641 | 1605 | |
9afd85c9 | 1606 | if (err == -ENOMSG) { |
91b02d3d | 1607 | if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) { |
bd4265fe | 1608 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
91b02d3d NA |
1609 | } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) { |
1610 | if (ip_hdr(skb)->protocol == IPPROTO_PIM) | |
1611 | br_multicast_pim(br, port, skb); | |
4b3087c7 | 1612 | } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) { |
08e71623 | 1613 | br_ip4_multicast_mrd_rcv(br, port, skb); |
91b02d3d | 1614 | } |
4b3087c7 | 1615 | |
eb1d1641 | 1616 | return 0; |
9afd85c9 | 1617 | } else if (err < 0) { |
1080ab95 | 1618 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1619 | return err; |
bd4265fe | 1620 | } |
eb1d1641 | 1621 | |
9afd85c9 | 1622 | ih = igmp_hdr(skb); |
6db6f0ea | 1623 | src = eth_hdr(skb)->h_source; |
1080ab95 | 1624 | BR_INPUT_SKB_CB(skb)->igmp = ih->type; |
eb1d1641 HX |
1625 | |
1626 | switch (ih->type) { | |
1627 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
1628 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
62b2bcb4 | 1629 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
6db6f0ea | 1630 | err = br_ip4_multicast_add_group(br, port, ih->group, vid, src); |
eb1d1641 HX |
1631 | break; |
1632 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
ba5ea614 | 1633 | err = br_ip4_multicast_igmp3_report(br, port, skb, vid); |
eb1d1641 HX |
1634 | break; |
1635 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
ba5ea614 | 1636 | br_ip4_multicast_query(br, port, skb, vid); |
eb1d1641 HX |
1637 | break; |
1638 | case IGMP_HOST_LEAVE_MESSAGE: | |
6db6f0ea | 1639 | br_ip4_multicast_leave_group(br, port, ih->group, vid, src); |
eb1d1641 HX |
1640 | break; |
1641 | } | |
1642 | ||
a65056ec | 1643 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1644 | BR_MCAST_DIR_RX); |
1645 | ||
eb1d1641 HX |
1646 | return err; |
1647 | } | |
1648 | ||
dfd56b8b | 1649 | #if IS_ENABLED(CONFIG_IPV6) |
4b3087c7 LL |
1650 | static int br_ip6_multicast_mrd_rcv(struct net_bridge *br, |
1651 | struct net_bridge_port *port, | |
1652 | struct sk_buff *skb) | |
1653 | { | |
1654 | int ret; | |
1655 | ||
1656 | if (ipv6_hdr(skb)->nexthdr != IPPROTO_ICMPV6) | |
1657 | return -ENOMSG; | |
1658 | ||
1659 | ret = ipv6_mc_check_icmpv6(skb); | |
1660 | if (ret < 0) | |
1661 | return ret; | |
1662 | ||
1663 | if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV) | |
1664 | return -ENOMSG; | |
1665 | ||
1666 | br_multicast_mark_router(br, port); | |
1667 | ||
1668 | return 0; | |
1669 | } | |
1670 | ||
08b202b6 YH |
1671 | static int br_multicast_ipv6_rcv(struct net_bridge *br, |
1672 | struct net_bridge_port *port, | |
06499098 VY |
1673 | struct sk_buff *skb, |
1674 | u16 vid) | |
08b202b6 | 1675 | { |
6db6f0ea | 1676 | const unsigned char *src; |
9afd85c9 | 1677 | struct mld_msg *mld; |
08b202b6 YH |
1678 | int err; |
1679 | ||
ba5ea614 | 1680 | err = ipv6_mc_check_mld(skb); |
08b202b6 | 1681 | |
9afd85c9 LL |
1682 | if (err == -ENOMSG) { |
1683 | if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr)) | |
1684 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
4b3087c7 LL |
1685 | |
1686 | if (ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr)) { | |
1687 | err = br_ip6_multicast_mrd_rcv(br, port, skb); | |
1688 | ||
1689 | if (err < 0 && err != -ENOMSG) { | |
1690 | br_multicast_err_count(br, port, skb->protocol); | |
1691 | return err; | |
1692 | } | |
1693 | } | |
1694 | ||
08b202b6 | 1695 | return 0; |
9afd85c9 | 1696 | } else if (err < 0) { |
1080ab95 | 1697 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1698 | return err; |
08b202b6 YH |
1699 | } |
1700 | ||
9afd85c9 | 1701 | mld = (struct mld_msg *)skb_transport_header(skb); |
1080ab95 | 1702 | BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type; |
08b202b6 | 1703 | |
9afd85c9 | 1704 | switch (mld->mld_type) { |
08b202b6 | 1705 | case ICMPV6_MGM_REPORT: |
6db6f0ea | 1706 | src = eth_hdr(skb)->h_source; |
fc2af6c7 | 1707 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
6db6f0ea FF |
1708 | err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid, |
1709 | src); | |
08b202b6 | 1710 | break; |
08b202b6 | 1711 | case ICMPV6_MLD2_REPORT: |
ba5ea614 | 1712 | err = br_ip6_multicast_mld2_report(br, port, skb, vid); |
08b202b6 YH |
1713 | break; |
1714 | case ICMPV6_MGM_QUERY: | |
ba5ea614 | 1715 | err = br_ip6_multicast_query(br, port, skb, vid); |
08b202b6 YH |
1716 | break; |
1717 | case ICMPV6_MGM_REDUCTION: | |
6db6f0ea FF |
1718 | src = eth_hdr(skb)->h_source; |
1719 | br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src); | |
9afd85c9 | 1720 | break; |
08b202b6 YH |
1721 | } |
1722 | ||
a65056ec | 1723 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1724 | BR_MCAST_DIR_RX); |
1725 | ||
08b202b6 YH |
1726 | return err; |
1727 | } | |
1728 | #endif | |
1729 | ||
eb1d1641 | 1730 | int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, |
06499098 | 1731 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 1732 | { |
1080ab95 NA |
1733 | int ret = 0; |
1734 | ||
1fafc7a9 YH |
1735 | BR_INPUT_SKB_CB(skb)->igmp = 0; |
1736 | BR_INPUT_SKB_CB(skb)->mrouters_only = 0; | |
1737 | ||
13cefad2 | 1738 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
1739 | return 0; |
1740 | ||
1741 | switch (skb->protocol) { | |
1742 | case htons(ETH_P_IP): | |
1080ab95 NA |
1743 | ret = br_multicast_ipv4_rcv(br, port, skb, vid); |
1744 | break; | |
dfd56b8b | 1745 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 1746 | case htons(ETH_P_IPV6): |
1080ab95 NA |
1747 | ret = br_multicast_ipv6_rcv(br, port, skb, vid); |
1748 | break; | |
08b202b6 | 1749 | #endif |
eb1d1641 HX |
1750 | } |
1751 | ||
1080ab95 | 1752 | return ret; |
eb1d1641 HX |
1753 | } |
1754 | ||
cc0fdd80 | 1755 | static void br_multicast_query_expired(struct net_bridge *br, |
2cd41431 LL |
1756 | struct bridge_mcast_own_query *query, |
1757 | struct bridge_mcast_querier *querier) | |
cc0fdd80 LL |
1758 | { |
1759 | spin_lock(&br->multicast_lock); | |
1760 | if (query->startup_sent < br->multicast_startup_query_count) | |
1761 | query->startup_sent++; | |
1762 | ||
71d9f614 | 1763 | RCU_INIT_POINTER(querier->port, NULL); |
cc0fdd80 LL |
1764 | br_multicast_send_query(br, NULL, query); |
1765 | spin_unlock(&br->multicast_lock); | |
1766 | } | |
1767 | ||
88c1f37f | 1768 | static void br_ip4_multicast_query_expired(struct timer_list *t) |
eb1d1641 | 1769 | { |
88c1f37f | 1770 | struct net_bridge *br = from_timer(br, t, ip4_own_query.timer); |
eb1d1641 | 1771 | |
2cd41431 | 1772 | br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier); |
cc0fdd80 | 1773 | } |
eb1d1641 | 1774 | |
cc0fdd80 | 1775 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f | 1776 | static void br_ip6_multicast_query_expired(struct timer_list *t) |
cc0fdd80 | 1777 | { |
88c1f37f | 1778 | struct net_bridge *br = from_timer(br, t, ip6_own_query.timer); |
eb1d1641 | 1779 | |
2cd41431 | 1780 | br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier); |
eb1d1641 | 1781 | } |
cc0fdd80 | 1782 | #endif |
eb1d1641 HX |
1783 | |
1784 | void br_multicast_init(struct net_bridge *br) | |
1785 | { | |
d08c6bc0 | 1786 | br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX; |
eb1d1641 | 1787 | |
7f0aec7a | 1788 | br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
eb1d1641 HX |
1789 | br->multicast_last_member_count = 2; |
1790 | br->multicast_startup_query_count = 2; | |
1791 | ||
1792 | br->multicast_last_member_interval = HZ; | |
1793 | br->multicast_query_response_interval = 10 * HZ; | |
1794 | br->multicast_startup_query_interval = 125 * HZ / 4; | |
1795 | br->multicast_query_interval = 125 * HZ; | |
1796 | br->multicast_querier_interval = 255 * HZ; | |
1797 | br->multicast_membership_interval = 260 * HZ; | |
1798 | ||
90010b36 | 1799 | br->ip4_other_query.delay_time = 0; |
2cd41431 | 1800 | br->ip4_querier.port = NULL; |
aa2ae3e7 | 1801 | br->multicast_igmp_version = 2; |
cc0fdd80 | 1802 | #if IS_ENABLED(CONFIG_IPV6) |
aa2ae3e7 | 1803 | br->multicast_mld_version = 1; |
90010b36 | 1804 | br->ip6_other_query.delay_time = 0; |
2cd41431 | 1805 | br->ip6_querier.port = NULL; |
cc0fdd80 | 1806 | #endif |
6919622a | 1807 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true); |
675779ad | 1808 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); |
b00589af | 1809 | |
eb1d1641 | 1810 | spin_lock_init(&br->multicast_lock); |
88c1f37f AP |
1811 | timer_setup(&br->multicast_router_timer, |
1812 | br_multicast_local_router_expired, 0); | |
1813 | timer_setup(&br->ip4_other_query.timer, | |
1814 | br_ip4_multicast_querier_expired, 0); | |
1815 | timer_setup(&br->ip4_own_query.timer, | |
1816 | br_ip4_multicast_query_expired, 0); | |
cc0fdd80 | 1817 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f AP |
1818 | timer_setup(&br->ip6_other_query.timer, |
1819 | br_ip6_multicast_querier_expired, 0); | |
1820 | timer_setup(&br->ip6_own_query.timer, | |
1821 | br_ip6_multicast_query_expired, 0); | |
cc0fdd80 | 1822 | #endif |
19e3a9c9 | 1823 | INIT_HLIST_HEAD(&br->mdb_list); |
eb1d1641 HX |
1824 | } |
1825 | ||
4effd28c LL |
1826 | static void br_ip4_multicast_join_snoopers(struct net_bridge *br) |
1827 | { | |
1828 | struct in_device *in_dev = in_dev_get(br->dev); | |
1829 | ||
1830 | if (!in_dev) | |
1831 | return; | |
1832 | ||
9fb20801 | 1833 | __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC); |
4effd28c LL |
1834 | in_dev_put(in_dev); |
1835 | } | |
1836 | ||
1837 | #if IS_ENABLED(CONFIG_IPV6) | |
1838 | static void br_ip6_multicast_join_snoopers(struct net_bridge *br) | |
1839 | { | |
1840 | struct in6_addr addr; | |
1841 | ||
1842 | ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a)); | |
1843 | ipv6_dev_mc_inc(br->dev, &addr); | |
1844 | } | |
1845 | #else | |
1846 | static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br) | |
1847 | { | |
1848 | } | |
1849 | #endif | |
1850 | ||
1851 | static void br_multicast_join_snoopers(struct net_bridge *br) | |
1852 | { | |
1853 | br_ip4_multicast_join_snoopers(br); | |
1854 | br_ip6_multicast_join_snoopers(br); | |
1855 | } | |
1856 | ||
1857 | static void br_ip4_multicast_leave_snoopers(struct net_bridge *br) | |
1858 | { | |
1859 | struct in_device *in_dev = in_dev_get(br->dev); | |
1860 | ||
1861 | if (WARN_ON(!in_dev)) | |
1862 | return; | |
1863 | ||
9fb20801 | 1864 | __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC); |
4effd28c LL |
1865 | in_dev_put(in_dev); |
1866 | } | |
1867 | ||
1868 | #if IS_ENABLED(CONFIG_IPV6) | |
1869 | static void br_ip6_multicast_leave_snoopers(struct net_bridge *br) | |
1870 | { | |
1871 | struct in6_addr addr; | |
1872 | ||
1873 | ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a)); | |
1874 | ipv6_dev_mc_dec(br->dev, &addr); | |
1875 | } | |
1876 | #else | |
1877 | static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br) | |
1878 | { | |
1879 | } | |
1880 | #endif | |
1881 | ||
1882 | static void br_multicast_leave_snoopers(struct net_bridge *br) | |
1883 | { | |
1884 | br_ip4_multicast_leave_snoopers(br); | |
1885 | br_ip6_multicast_leave_snoopers(br); | |
1886 | } | |
1887 | ||
cc0fdd80 | 1888 | static void __br_multicast_open(struct net_bridge *br, |
90010b36 | 1889 | struct bridge_mcast_own_query *query) |
eb1d1641 | 1890 | { |
cc0fdd80 | 1891 | query->startup_sent = 0; |
eb1d1641 | 1892 | |
13cefad2 | 1893 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
1894 | return; |
1895 | ||
cc0fdd80 LL |
1896 | mod_timer(&query->timer, jiffies); |
1897 | } | |
1898 | ||
1899 | void br_multicast_open(struct net_bridge *br) | |
1900 | { | |
4effd28c LL |
1901 | if (br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
1902 | br_multicast_join_snoopers(br); | |
1903 | ||
90010b36 | 1904 | __br_multicast_open(br, &br->ip4_own_query); |
cc0fdd80 | 1905 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1906 | __br_multicast_open(br, &br->ip6_own_query); |
cc0fdd80 | 1907 | #endif |
eb1d1641 HX |
1908 | } |
1909 | ||
1910 | void br_multicast_stop(struct net_bridge *br) | |
1911 | { | |
eb1d1641 | 1912 | del_timer_sync(&br->multicast_router_timer); |
90010b36 LL |
1913 | del_timer_sync(&br->ip4_other_query.timer); |
1914 | del_timer_sync(&br->ip4_own_query.timer); | |
cc0fdd80 | 1915 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 LL |
1916 | del_timer_sync(&br->ip6_other_query.timer); |
1917 | del_timer_sync(&br->ip6_own_query.timer); | |
cc0fdd80 | 1918 | #endif |
4effd28c LL |
1919 | |
1920 | if (br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
1921 | br_multicast_leave_snoopers(br); | |
e10177ab SA |
1922 | } |
1923 | ||
1924 | void br_multicast_dev_del(struct net_bridge *br) | |
1925 | { | |
e10177ab | 1926 | struct net_bridge_mdb_entry *mp; |
19e3a9c9 | 1927 | struct hlist_node *tmp; |
eb1d1641 HX |
1928 | |
1929 | spin_lock_bh(&br->multicast_lock); | |
19e3a9c9 NA |
1930 | hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node) { |
1931 | del_timer(&mp->timer); | |
1932 | rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode, | |
1933 | br_mdb_rht_params); | |
1934 | hlist_del_rcu(&mp->mdb_node); | |
4329596c | 1935 | kfree_rcu(mp, rcu); |
eb1d1641 | 1936 | } |
eb1d1641 | 1937 | spin_unlock_bh(&br->multicast_lock); |
19e3a9c9 | 1938 | |
4329596c | 1939 | rcu_barrier(); |
eb1d1641 | 1940 | } |
0909e117 HX |
1941 | |
1942 | int br_multicast_set_router(struct net_bridge *br, unsigned long val) | |
1943 | { | |
6ae4ae8e | 1944 | int err = -EINVAL; |
0909e117 HX |
1945 | |
1946 | spin_lock_bh(&br->multicast_lock); | |
0909e117 HX |
1947 | |
1948 | switch (val) { | |
7f0aec7a NA |
1949 | case MDB_RTR_TYPE_DISABLED: |
1950 | case MDB_RTR_TYPE_PERM: | |
77041420 | 1951 | br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM); |
0909e117 | 1952 | del_timer(&br->multicast_router_timer); |
77041420 YG |
1953 | br->multicast_router = val; |
1954 | err = 0; | |
1955 | break; | |
7f0aec7a | 1956 | case MDB_RTR_TYPE_TEMP_QUERY: |
77041420 YG |
1957 | if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY) |
1958 | br_mc_router_state_change(br, false); | |
0909e117 HX |
1959 | br->multicast_router = val; |
1960 | err = 0; | |
1961 | break; | |
0909e117 HX |
1962 | } |
1963 | ||
0909e117 HX |
1964 | spin_unlock_bh(&br->multicast_lock); |
1965 | ||
1966 | return err; | |
1967 | } | |
1968 | ||
7f0aec7a NA |
1969 | static void __del_port_router(struct net_bridge_port *p) |
1970 | { | |
1971 | if (hlist_unhashed(&p->rlist)) | |
1972 | return; | |
1973 | hlist_del_init_rcu(&p->rlist); | |
1974 | br_rtr_notify(p->br->dev, p, RTM_DELMDB); | |
6d549648 | 1975 | br_port_mc_router_state_change(p, false); |
f12e7d95 NF |
1976 | |
1977 | /* don't allow timer refresh */ | |
1978 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
1979 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
7f0aec7a NA |
1980 | } |
1981 | ||
0909e117 HX |
1982 | int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val) |
1983 | { | |
1984 | struct net_bridge *br = p->br; | |
a55d8246 | 1985 | unsigned long now = jiffies; |
6ae4ae8e | 1986 | int err = -EINVAL; |
0909e117 HX |
1987 | |
1988 | spin_lock(&br->multicast_lock); | |
4950cfd1 | 1989 | if (p->multicast_router == val) { |
a55d8246 NA |
1990 | /* Refresh the temp router port timer */ |
1991 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
1992 | mod_timer(&p->multicast_router_timer, | |
1993 | now + br->multicast_querier_interval); | |
4950cfd1 NA |
1994 | err = 0; |
1995 | goto unlock; | |
1996 | } | |
0909e117 | 1997 | switch (val) { |
7f0aec7a NA |
1998 | case MDB_RTR_TYPE_DISABLED: |
1999 | p->multicast_router = MDB_RTR_TYPE_DISABLED; | |
2000 | __del_port_router(p); | |
2001 | del_timer(&p->multicast_router_timer); | |
2002 | break; | |
2003 | case MDB_RTR_TYPE_TEMP_QUERY: | |
2004 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
2005 | __del_port_router(p); | |
2006 | break; | |
2007 | case MDB_RTR_TYPE_PERM: | |
2008 | p->multicast_router = MDB_RTR_TYPE_PERM; | |
0909e117 | 2009 | del_timer(&p->multicast_router_timer); |
0909e117 HX |
2010 | br_multicast_add_router(br, p); |
2011 | break; | |
a55d8246 NA |
2012 | case MDB_RTR_TYPE_TEMP: |
2013 | p->multicast_router = MDB_RTR_TYPE_TEMP; | |
2014 | br_multicast_mark_router(br, p); | |
2015 | break; | |
7f0aec7a NA |
2016 | default: |
2017 | goto unlock; | |
0909e117 | 2018 | } |
7f0aec7a NA |
2019 | err = 0; |
2020 | unlock: | |
0909e117 HX |
2021 | spin_unlock(&br->multicast_lock); |
2022 | ||
2023 | return err; | |
2024 | } | |
561f1103 | 2025 | |
cc0fdd80 | 2026 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 2027 | struct bridge_mcast_own_query *query) |
561f1103 HX |
2028 | { |
2029 | struct net_bridge_port *port; | |
74857216 | 2030 | |
cc0fdd80 | 2031 | __br_multicast_open(br, query); |
74857216 | 2032 | |
c5b493ce NA |
2033 | rcu_read_lock(); |
2034 | list_for_each_entry_rcu(port, &br->port_list, list) { | |
74857216 HX |
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 | 2045 | } |
c5b493ce | 2046 | rcu_read_unlock(); |
74857216 HX |
2047 | } |
2048 | ||
2049 | int br_multicast_toggle(struct net_bridge *br, unsigned long val) | |
2050 | { | |
7cb3f921 | 2051 | struct net_bridge_port *port; |
561f1103 | 2052 | |
ef5e0d82 | 2053 | spin_lock_bh(&br->multicast_lock); |
13cefad2 | 2054 | if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val) |
561f1103 HX |
2055 | goto unlock; |
2056 | ||
13cefad2 NA |
2057 | br_mc_disabled_update(br->dev, val); |
2058 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val); | |
4effd28c LL |
2059 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) { |
2060 | br_multicast_leave_snoopers(br); | |
561f1103 | 2061 | goto unlock; |
4effd28c | 2062 | } |
561f1103 | 2063 | |
3a7fda06 HX |
2064 | if (!netif_running(br->dev)) |
2065 | goto unlock; | |
2066 | ||
7cb3f921 NA |
2067 | br_multicast_open(br); |
2068 | list_for_each_entry(port, &br->port_list, list) | |
2069 | __br_multicast_enable_port(port); | |
561f1103 HX |
2070 | |
2071 | unlock: | |
ef5e0d82 | 2072 | spin_unlock_bh(&br->multicast_lock); |
561f1103 | 2073 | |
a26d94bf | 2074 | return 0; |
561f1103 | 2075 | } |
b195167f | 2076 | |
9341b988 IS |
2077 | bool br_multicast_enabled(const struct net_device *dev) |
2078 | { | |
2079 | struct net_bridge *br = netdev_priv(dev); | |
2080 | ||
13cefad2 | 2081 | return !!br_opt_get(br, BROPT_MULTICAST_ENABLED); |
9341b988 IS |
2082 | } |
2083 | EXPORT_SYMBOL_GPL(br_multicast_enabled); | |
2084 | ||
0912bda4 YG |
2085 | bool br_multicast_router(const struct net_device *dev) |
2086 | { | |
2087 | struct net_bridge *br = netdev_priv(dev); | |
2088 | bool is_router; | |
2089 | ||
2090 | spin_lock_bh(&br->multicast_lock); | |
2091 | is_router = br_multicast_is_router(br); | |
2092 | spin_unlock_bh(&br->multicast_lock); | |
2093 | return is_router; | |
2094 | } | |
2095 | EXPORT_SYMBOL_GPL(br_multicast_router); | |
2096 | ||
c5c23260 HX |
2097 | int br_multicast_set_querier(struct net_bridge *br, unsigned long val) |
2098 | { | |
b00589af LL |
2099 | unsigned long max_delay; |
2100 | ||
c5c23260 HX |
2101 | val = !!val; |
2102 | ||
2103 | spin_lock_bh(&br->multicast_lock); | |
675779ad | 2104 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val) |
c5c23260 HX |
2105 | goto unlock; |
2106 | ||
675779ad | 2107 | br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val); |
b00589af LL |
2108 | if (!val) |
2109 | goto unlock; | |
2110 | ||
2111 | max_delay = br->multicast_query_response_interval; | |
b00589af | 2112 | |
90010b36 LL |
2113 | if (!timer_pending(&br->ip4_other_query.timer)) |
2114 | br->ip4_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2115 | |
90010b36 | 2116 | br_multicast_start_querier(br, &br->ip4_own_query); |
cc0fdd80 LL |
2117 | |
2118 | #if IS_ENABLED(CONFIG_IPV6) | |
90010b36 LL |
2119 | if (!timer_pending(&br->ip6_other_query.timer)) |
2120 | br->ip6_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2121 | |
90010b36 | 2122 | br_multicast_start_querier(br, &br->ip6_own_query); |
cc0fdd80 | 2123 | #endif |
c5c23260 HX |
2124 | |
2125 | unlock: | |
2126 | spin_unlock_bh(&br->multicast_lock); | |
2127 | ||
2128 | return 0; | |
2129 | } | |
2130 | ||
5e923585 NA |
2131 | int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val) |
2132 | { | |
2133 | /* Currently we support only version 2 and 3 */ | |
2134 | switch (val) { | |
2135 | case 2: | |
2136 | case 3: | |
2137 | break; | |
2138 | default: | |
2139 | return -EINVAL; | |
2140 | } | |
2141 | ||
2142 | spin_lock_bh(&br->multicast_lock); | |
2143 | br->multicast_igmp_version = val; | |
2144 | spin_unlock_bh(&br->multicast_lock); | |
2145 | ||
2146 | return 0; | |
2147 | } | |
2148 | ||
aa2ae3e7 NA |
2149 | #if IS_ENABLED(CONFIG_IPV6) |
2150 | int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val) | |
2151 | { | |
2152 | /* Currently we support version 1 and 2 */ | |
2153 | switch (val) { | |
2154 | case 1: | |
2155 | case 2: | |
2156 | break; | |
2157 | default: | |
2158 | return -EINVAL; | |
2159 | } | |
2160 | ||
2161 | spin_lock_bh(&br->multicast_lock); | |
2162 | br->multicast_mld_version = val; | |
2163 | spin_unlock_bh(&br->multicast_lock); | |
2164 | ||
2165 | return 0; | |
2166 | } | |
2167 | #endif | |
2168 | ||
07f8ac4a LL |
2169 | /** |
2170 | * br_multicast_list_adjacent - Returns snooped multicast addresses | |
2171 | * @dev: The bridge port adjacent to which to retrieve addresses | |
2172 | * @br_ip_list: The list to store found, snooped multicast IP addresses in | |
2173 | * | |
2174 | * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast | |
2175 | * snooping feature on all bridge ports of dev's bridge device, excluding | |
2176 | * the addresses from dev itself. | |
2177 | * | |
2178 | * Returns the number of items added to br_ip_list. | |
2179 | * | |
2180 | * Notes: | |
2181 | * - br_ip_list needs to be initialized by caller | |
2182 | * - br_ip_list might contain duplicates in the end | |
2183 | * (needs to be taken care of by caller) | |
2184 | * - br_ip_list needs to be freed by caller | |
2185 | */ | |
2186 | int br_multicast_list_adjacent(struct net_device *dev, | |
2187 | struct list_head *br_ip_list) | |
2188 | { | |
2189 | struct net_bridge *br; | |
2190 | struct net_bridge_port *port; | |
2191 | struct net_bridge_port_group *group; | |
2192 | struct br_ip_list *entry; | |
2193 | int count = 0; | |
2194 | ||
2195 | rcu_read_lock(); | |
35f861e3 | 2196 | if (!br_ip_list || !netif_is_bridge_port(dev)) |
07f8ac4a LL |
2197 | goto unlock; |
2198 | ||
2199 | port = br_port_get_rcu(dev); | |
2200 | if (!port || !port->br) | |
2201 | goto unlock; | |
2202 | ||
2203 | br = port->br; | |
2204 | ||
2205 | list_for_each_entry_rcu(port, &br->port_list, list) { | |
2206 | if (!port->dev || port->dev == dev) | |
2207 | continue; | |
2208 | ||
2209 | hlist_for_each_entry_rcu(group, &port->mglist, mglist) { | |
2210 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); | |
2211 | if (!entry) | |
2212 | goto unlock; | |
2213 | ||
2214 | entry->addr = group->addr; | |
2215 | list_add(&entry->list, br_ip_list); | |
2216 | count++; | |
2217 | } | |
2218 | } | |
2219 | ||
2220 | unlock: | |
2221 | rcu_read_unlock(); | |
2222 | return count; | |
2223 | } | |
2224 | EXPORT_SYMBOL_GPL(br_multicast_list_adjacent); | |
2cd41431 | 2225 | |
c34963e2 LL |
2226 | /** |
2227 | * br_multicast_has_querier_anywhere - Checks for a querier on a bridge | |
2228 | * @dev: The bridge port providing the bridge on which to check for a querier | |
2229 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2230 | * | |
2231 | * Checks whether the given interface has a bridge on top and if so returns | |
2232 | * true if a valid querier exists anywhere on the bridged link layer. | |
2233 | * Otherwise returns false. | |
2234 | */ | |
2235 | bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto) | |
2236 | { | |
2237 | struct net_bridge *br; | |
2238 | struct net_bridge_port *port; | |
2239 | struct ethhdr eth; | |
2240 | bool ret = false; | |
2241 | ||
2242 | rcu_read_lock(); | |
35f861e3 | 2243 | if (!netif_is_bridge_port(dev)) |
c34963e2 LL |
2244 | goto unlock; |
2245 | ||
2246 | port = br_port_get_rcu(dev); | |
2247 | if (!port || !port->br) | |
2248 | goto unlock; | |
2249 | ||
2250 | br = port->br; | |
2251 | ||
2252 | memset(ð, 0, sizeof(eth)); | |
2253 | eth.h_proto = htons(proto); | |
2254 | ||
2255 | ret = br_multicast_querier_exists(br, ð); | |
2256 | ||
2257 | unlock: | |
2258 | rcu_read_unlock(); | |
2259 | return ret; | |
2260 | } | |
2261 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere); | |
2262 | ||
2cd41431 LL |
2263 | /** |
2264 | * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port | |
2265 | * @dev: The bridge port adjacent to which to check for a querier | |
2266 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2267 | * | |
2268 | * Checks whether the given interface has a bridge on top and if so returns | |
2269 | * true if a selected querier is behind one of the other ports of this | |
2270 | * bridge. Otherwise returns false. | |
2271 | */ | |
2272 | bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto) | |
2273 | { | |
2274 | struct net_bridge *br; | |
2275 | struct net_bridge_port *port; | |
2276 | bool ret = false; | |
2277 | ||
2278 | rcu_read_lock(); | |
35f861e3 | 2279 | if (!netif_is_bridge_port(dev)) |
2cd41431 LL |
2280 | goto unlock; |
2281 | ||
2282 | port = br_port_get_rcu(dev); | |
2283 | if (!port || !port->br) | |
2284 | goto unlock; | |
2285 | ||
2286 | br = port->br; | |
2287 | ||
2288 | switch (proto) { | |
2289 | case ETH_P_IP: | |
2290 | if (!timer_pending(&br->ip4_other_query.timer) || | |
2291 | rcu_dereference(br->ip4_querier.port) == port) | |
2292 | goto unlock; | |
2293 | break; | |
3993c4e1 | 2294 | #if IS_ENABLED(CONFIG_IPV6) |
2cd41431 LL |
2295 | case ETH_P_IPV6: |
2296 | if (!timer_pending(&br->ip6_other_query.timer) || | |
2297 | rcu_dereference(br->ip6_querier.port) == port) | |
2298 | goto unlock; | |
2299 | break; | |
3993c4e1 | 2300 | #endif |
2cd41431 LL |
2301 | default: |
2302 | goto unlock; | |
2303 | } | |
2304 | ||
2305 | ret = true; | |
2306 | unlock: | |
2307 | rcu_read_unlock(); | |
2308 | return ret; | |
2309 | } | |
2310 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent); | |
1080ab95 NA |
2311 | |
2312 | static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, | |
a65056ec | 2313 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2314 | { |
2315 | struct bridge_mcast_stats *pstats = this_cpu_ptr(stats); | |
a65056ec NA |
2316 | __be16 proto = skb->protocol; |
2317 | unsigned int t_len; | |
1080ab95 NA |
2318 | |
2319 | u64_stats_update_begin(&pstats->syncp); | |
2320 | switch (proto) { | |
2321 | case htons(ETH_P_IP): | |
a65056ec | 2322 | t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb); |
1080ab95 NA |
2323 | switch (type) { |
2324 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
2325 | pstats->mstats.igmp_v1reports[dir]++; | |
2326 | break; | |
2327 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
2328 | pstats->mstats.igmp_v2reports[dir]++; | |
2329 | break; | |
2330 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
2331 | pstats->mstats.igmp_v3reports[dir]++; | |
2332 | break; | |
2333 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
a65056ec NA |
2334 | if (t_len != sizeof(struct igmphdr)) { |
2335 | pstats->mstats.igmp_v3queries[dir]++; | |
2336 | } else { | |
2337 | unsigned int offset = skb_transport_offset(skb); | |
2338 | struct igmphdr *ih, _ihdr; | |
2339 | ||
2340 | ih = skb_header_pointer(skb, offset, | |
2341 | sizeof(_ihdr), &_ihdr); | |
2342 | if (!ih) | |
2343 | break; | |
2344 | if (!ih->code) | |
2345 | pstats->mstats.igmp_v1queries[dir]++; | |
2346 | else | |
2347 | pstats->mstats.igmp_v2queries[dir]++; | |
2348 | } | |
1080ab95 NA |
2349 | break; |
2350 | case IGMP_HOST_LEAVE_MESSAGE: | |
2351 | pstats->mstats.igmp_leaves[dir]++; | |
2352 | break; | |
2353 | } | |
2354 | break; | |
2355 | #if IS_ENABLED(CONFIG_IPV6) | |
2356 | case htons(ETH_P_IPV6): | |
a65056ec NA |
2357 | t_len = ntohs(ipv6_hdr(skb)->payload_len) + |
2358 | sizeof(struct ipv6hdr); | |
2359 | t_len -= skb_network_header_len(skb); | |
1080ab95 NA |
2360 | switch (type) { |
2361 | case ICMPV6_MGM_REPORT: | |
2362 | pstats->mstats.mld_v1reports[dir]++; | |
2363 | break; | |
2364 | case ICMPV6_MLD2_REPORT: | |
2365 | pstats->mstats.mld_v2reports[dir]++; | |
2366 | break; | |
2367 | case ICMPV6_MGM_QUERY: | |
a65056ec NA |
2368 | if (t_len != sizeof(struct mld_msg)) |
2369 | pstats->mstats.mld_v2queries[dir]++; | |
2370 | else | |
2371 | pstats->mstats.mld_v1queries[dir]++; | |
1080ab95 NA |
2372 | break; |
2373 | case ICMPV6_MGM_REDUCTION: | |
2374 | pstats->mstats.mld_leaves[dir]++; | |
2375 | break; | |
2376 | } | |
2377 | break; | |
2378 | #endif /* CONFIG_IPV6 */ | |
2379 | } | |
2380 | u64_stats_update_end(&pstats->syncp); | |
2381 | } | |
2382 | ||
2383 | void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, | |
a65056ec | 2384 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2385 | { |
2386 | struct bridge_mcast_stats __percpu *stats; | |
2387 | ||
2388 | /* if multicast_disabled is true then igmp type can't be set */ | |
675779ad | 2389 | if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) |
1080ab95 NA |
2390 | return; |
2391 | ||
2392 | if (p) | |
2393 | stats = p->mcast_stats; | |
2394 | else | |
2395 | stats = br->mcast_stats; | |
2396 | if (WARN_ON(!stats)) | |
2397 | return; | |
2398 | ||
a65056ec | 2399 | br_mcast_stats_add(stats, skb, type, dir); |
1080ab95 NA |
2400 | } |
2401 | ||
2402 | int br_multicast_init_stats(struct net_bridge *br) | |
2403 | { | |
2404 | br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); | |
2405 | if (!br->mcast_stats) | |
2406 | return -ENOMEM; | |
2407 | ||
2408 | return 0; | |
2409 | } | |
2410 | ||
b6fe0440 IS |
2411 | void br_multicast_uninit_stats(struct net_bridge *br) |
2412 | { | |
2413 | free_percpu(br->mcast_stats); | |
2414 | } | |
2415 | ||
1080ab95 NA |
2416 | static void mcast_stats_add_dir(u64 *dst, u64 *src) |
2417 | { | |
2418 | dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX]; | |
2419 | dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX]; | |
2420 | } | |
2421 | ||
2422 | void br_multicast_get_stats(const struct net_bridge *br, | |
2423 | const struct net_bridge_port *p, | |
2424 | struct br_mcast_stats *dest) | |
2425 | { | |
2426 | struct bridge_mcast_stats __percpu *stats; | |
2427 | struct br_mcast_stats tdst; | |
2428 | int i; | |
2429 | ||
2430 | memset(dest, 0, sizeof(*dest)); | |
2431 | if (p) | |
2432 | stats = p->mcast_stats; | |
2433 | else | |
2434 | stats = br->mcast_stats; | |
2435 | if (WARN_ON(!stats)) | |
2436 | return; | |
2437 | ||
2438 | memset(&tdst, 0, sizeof(tdst)); | |
2439 | for_each_possible_cpu(i) { | |
2440 | struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i); | |
2441 | struct br_mcast_stats temp; | |
2442 | unsigned int start; | |
2443 | ||
2444 | do { | |
2445 | start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); | |
2446 | memcpy(&temp, &cpu_stats->mstats, sizeof(temp)); | |
2447 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); | |
2448 | ||
a65056ec NA |
2449 | mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries); |
2450 | mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries); | |
2451 | mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries); | |
1080ab95 NA |
2452 | mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves); |
2453 | mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports); | |
2454 | mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports); | |
2455 | mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports); | |
2456 | tdst.igmp_parse_errors += temp.igmp_parse_errors; | |
2457 | ||
a65056ec NA |
2458 | mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries); |
2459 | mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries); | |
1080ab95 NA |
2460 | mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves); |
2461 | mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports); | |
2462 | mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports); | |
2463 | tdst.mld_parse_errors += temp.mld_parse_errors; | |
2464 | } | |
2465 | memcpy(dest, &tdst, sizeof(*dest)); | |
2466 | } | |
19e3a9c9 NA |
2467 | |
2468 | int br_mdb_hash_init(struct net_bridge *br) | |
2469 | { | |
2470 | return rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params); | |
2471 | } | |
2472 | ||
2473 | void br_mdb_hash_fini(struct net_bridge *br) | |
2474 | { | |
2475 | rhashtable_destroy(&br->mdb_hash_tbl); | |
2476 | } |