]>
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 | ||
ff0fd34e | 151 | mp->host_joined = false; |
2a26028d | 152 | br_mdb_notify(br->dev, NULL, &mp->addr, RTM_DELMDB, 0); |
eb1d1641 HX |
153 | |
154 | if (mp->ports) | |
155 | goto out; | |
156 | ||
19e3a9c9 NA |
157 | rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode, |
158 | br_mdb_rht_params); | |
159 | hlist_del_rcu(&mp->mdb_node); | |
eb1d1641 | 160 | |
4329596c | 161 | kfree_rcu(mp, rcu); |
eb1d1641 HX |
162 | |
163 | out: | |
164 | spin_unlock(&br->multicast_lock); | |
165 | } | |
166 | ||
167 | static void br_multicast_del_pg(struct net_bridge *br, | |
168 | struct net_bridge_port_group *pg) | |
169 | { | |
eb1d1641 HX |
170 | struct net_bridge_mdb_entry *mp; |
171 | struct net_bridge_port_group *p; | |
e8051688 ED |
172 | struct net_bridge_port_group __rcu **pp; |
173 | ||
19e3a9c9 | 174 | mp = br_mdb_ip_get(br, &pg->addr); |
eb1d1641 HX |
175 | if (WARN_ON(!mp)) |
176 | return; | |
177 | ||
e8051688 ED |
178 | for (pp = &mp->ports; |
179 | (p = mlock_dereference(*pp, br)) != NULL; | |
180 | pp = &p->next) { | |
eb1d1641 HX |
181 | if (p != pg) |
182 | continue; | |
183 | ||
83f6a740 | 184 | rcu_assign_pointer(*pp, p->next); |
eb1d1641 HX |
185 | hlist_del_init(&p->mglist); |
186 | del_timer(&p->timer); | |
45ebcce5 ER |
187 | br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB, |
188 | p->flags); | |
4329596c | 189 | kfree_rcu(p, rcu); |
eb1d1641 | 190 | |
ff0fd34e | 191 | if (!mp->ports && !mp->host_joined && |
eb1d1641 HX |
192 | netif_running(br->dev)) |
193 | mod_timer(&mp->timer, jiffies); | |
194 | ||
195 | return; | |
196 | } | |
197 | ||
198 | WARN_ON(1); | |
199 | } | |
200 | ||
88c1f37f | 201 | static void br_multicast_port_group_expired(struct timer_list *t) |
eb1d1641 | 202 | { |
88c1f37f | 203 | struct net_bridge_port_group *pg = from_timer(pg, t, timer); |
eb1d1641 HX |
204 | struct net_bridge *br = pg->port->br; |
205 | ||
206 | spin_lock(&br->multicast_lock); | |
207 | if (!netif_running(br->dev) || timer_pending(&pg->timer) || | |
9d06b6d8 | 208 | hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT) |
eb1d1641 HX |
209 | goto out; |
210 | ||
211 | br_multicast_del_pg(br, pg); | |
212 | ||
213 | out: | |
214 | spin_unlock(&br->multicast_lock); | |
215 | } | |
216 | ||
8ef2a9a5 | 217 | static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
218 | __be32 group, |
219 | u8 *igmp_type) | |
eb1d1641 | 220 | { |
5e923585 NA |
221 | struct igmpv3_query *ihv3; |
222 | size_t igmp_hdr_size; | |
eb1d1641 HX |
223 | struct sk_buff *skb; |
224 | struct igmphdr *ih; | |
225 | struct ethhdr *eth; | |
226 | struct iphdr *iph; | |
227 | ||
5e923585 NA |
228 | igmp_hdr_size = sizeof(*ih); |
229 | if (br->multicast_igmp_version == 3) | |
230 | igmp_hdr_size = sizeof(*ihv3); | |
eb1d1641 | 231 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) + |
5e923585 | 232 | igmp_hdr_size + 4); |
eb1d1641 HX |
233 | if (!skb) |
234 | goto out; | |
235 | ||
236 | skb->protocol = htons(ETH_P_IP); | |
237 | ||
238 | skb_reset_mac_header(skb); | |
239 | eth = eth_hdr(skb); | |
240 | ||
e5a727f6 | 241 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
eb1d1641 HX |
242 | eth->h_dest[0] = 1; |
243 | eth->h_dest[1] = 0; | |
244 | eth->h_dest[2] = 0x5e; | |
245 | eth->h_dest[3] = 0; | |
246 | eth->h_dest[4] = 0; | |
247 | eth->h_dest[5] = 1; | |
248 | eth->h_proto = htons(ETH_P_IP); | |
249 | skb_put(skb, sizeof(*eth)); | |
250 | ||
251 | skb_set_network_header(skb, skb->len); | |
252 | iph = ip_hdr(skb); | |
253 | ||
254 | iph->version = 4; | |
255 | iph->ihl = 6; | |
256 | iph->tos = 0xc0; | |
5e923585 | 257 | iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4); |
eb1d1641 HX |
258 | iph->id = 0; |
259 | iph->frag_off = htons(IP_DF); | |
260 | iph->ttl = 1; | |
261 | iph->protocol = IPPROTO_IGMP; | |
675779ad | 262 | iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ? |
1c8ad5bf | 263 | inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0; |
eb1d1641 HX |
264 | iph->daddr = htonl(INADDR_ALLHOSTS_GROUP); |
265 | ((u8 *)&iph[1])[0] = IPOPT_RA; | |
266 | ((u8 *)&iph[1])[1] = 4; | |
267 | ((u8 *)&iph[1])[2] = 0; | |
268 | ((u8 *)&iph[1])[3] = 0; | |
269 | ip_send_check(iph); | |
270 | skb_put(skb, 24); | |
271 | ||
272 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 273 | *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY; |
eb1d1641 | 274 | |
5e923585 NA |
275 | switch (br->multicast_igmp_version) { |
276 | case 2: | |
277 | ih = igmp_hdr(skb); | |
278 | ih->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
279 | ih->code = (group ? br->multicast_last_member_interval : | |
280 | br->multicast_query_response_interval) / | |
281 | (HZ / IGMP_TIMER_SCALE); | |
282 | ih->group = group; | |
283 | ih->csum = 0; | |
284 | ih->csum = ip_compute_csum((void *)ih, sizeof(*ih)); | |
285 | break; | |
286 | case 3: | |
287 | ihv3 = igmpv3_query_hdr(skb); | |
288 | ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
289 | ihv3->code = (group ? br->multicast_last_member_interval : | |
290 | br->multicast_query_response_interval) / | |
291 | (HZ / IGMP_TIMER_SCALE); | |
292 | ihv3->group = group; | |
293 | ihv3->qqic = br->multicast_query_interval / HZ; | |
294 | ihv3->nsrcs = 0; | |
295 | ihv3->resv = 0; | |
296 | ihv3->suppress = 0; | |
297 | ihv3->qrv = 2; | |
298 | ihv3->csum = 0; | |
299 | ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3)); | |
300 | break; | |
301 | } | |
302 | ||
303 | skb_put(skb, igmp_hdr_size); | |
eb1d1641 HX |
304 | __skb_pull(skb, sizeof(*eth)); |
305 | ||
306 | out: | |
307 | return skb; | |
308 | } | |
309 | ||
dfd56b8b | 310 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 311 | static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
312 | const struct in6_addr *grp, |
313 | u8 *igmp_type) | |
08b202b6 | 314 | { |
aa2ae3e7 NA |
315 | struct mld2_query *mld2q; |
316 | unsigned long interval; | |
08b202b6 YH |
317 | struct ipv6hdr *ip6h; |
318 | struct mld_msg *mldq; | |
aa2ae3e7 NA |
319 | size_t mld_hdr_size; |
320 | struct sk_buff *skb; | |
08b202b6 YH |
321 | struct ethhdr *eth; |
322 | u8 *hopopt; | |
08b202b6 | 323 | |
aa2ae3e7 NA |
324 | mld_hdr_size = sizeof(*mldq); |
325 | if (br->multicast_mld_version == 2) | |
326 | mld_hdr_size = sizeof(*mld2q); | |
08b202b6 | 327 | skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) + |
aa2ae3e7 | 328 | 8 + mld_hdr_size); |
08b202b6 YH |
329 | if (!skb) |
330 | goto out; | |
331 | ||
332 | skb->protocol = htons(ETH_P_IPV6); | |
333 | ||
334 | /* Ethernet header */ | |
335 | skb_reset_mac_header(skb); | |
336 | eth = eth_hdr(skb); | |
337 | ||
e5a727f6 | 338 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
08b202b6 YH |
339 | eth->h_proto = htons(ETH_P_IPV6); |
340 | skb_put(skb, sizeof(*eth)); | |
341 | ||
342 | /* IPv6 header + HbH option */ | |
343 | skb_set_network_header(skb, skb->len); | |
344 | ip6h = ipv6_hdr(skb); | |
345 | ||
346 | *(__force __be32 *)ip6h = htonl(0x60000000); | |
aa2ae3e7 | 347 | ip6h->payload_len = htons(8 + mld_hdr_size); |
08b202b6 YH |
348 | ip6h->nexthdr = IPPROTO_HOPOPTS; |
349 | ip6h->hop_limit = 1; | |
a7bff75b | 350 | ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1)); |
d1d81d4c UW |
351 | if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, |
352 | &ip6h->saddr)) { | |
353 | kfree_skb(skb); | |
675779ad | 354 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false); |
d1d81d4c UW |
355 | return NULL; |
356 | } | |
0888d5f3 | 357 | |
675779ad | 358 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); |
36cff5a1 | 359 | ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); |
08b202b6 YH |
360 | |
361 | hopopt = (u8 *)(ip6h + 1); | |
362 | hopopt[0] = IPPROTO_ICMPV6; /* next hdr */ | |
363 | hopopt[1] = 0; /* length of HbH */ | |
364 | hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */ | |
365 | hopopt[3] = 2; /* Length of RA Option */ | |
366 | hopopt[4] = 0; /* Type = 0x0000 (MLD) */ | |
367 | hopopt[5] = 0; | |
1de5a71c EZ |
368 | hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */ |
369 | hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */ | |
08b202b6 YH |
370 | |
371 | skb_put(skb, sizeof(*ip6h) + 8); | |
372 | ||
373 | /* ICMPv6 */ | |
374 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 375 | interval = ipv6_addr_any(grp) ? |
32de868c LL |
376 | br->multicast_query_response_interval : |
377 | br->multicast_last_member_interval; | |
1080ab95 | 378 | *igmp_type = ICMPV6_MGM_QUERY; |
aa2ae3e7 NA |
379 | switch (br->multicast_mld_version) { |
380 | case 1: | |
381 | mldq = (struct mld_msg *)icmp6_hdr(skb); | |
382 | mldq->mld_type = ICMPV6_MGM_QUERY; | |
383 | mldq->mld_code = 0; | |
384 | mldq->mld_cksum = 0; | |
385 | mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval)); | |
386 | mldq->mld_reserved = 0; | |
387 | mldq->mld_mca = *grp; | |
388 | mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
389 | sizeof(*mldq), IPPROTO_ICMPV6, | |
390 | csum_partial(mldq, | |
391 | sizeof(*mldq), | |
392 | 0)); | |
393 | break; | |
394 | case 2: | |
395 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
53631a5f | 396 | mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval)); |
aa2ae3e7 NA |
397 | mld2q->mld2q_type = ICMPV6_MGM_QUERY; |
398 | mld2q->mld2q_code = 0; | |
399 | mld2q->mld2q_cksum = 0; | |
400 | mld2q->mld2q_resv1 = 0; | |
401 | mld2q->mld2q_resv2 = 0; | |
402 | mld2q->mld2q_suppress = 0; | |
403 | mld2q->mld2q_qrv = 2; | |
404 | mld2q->mld2q_nsrcs = 0; | |
405 | mld2q->mld2q_qqic = br->multicast_query_interval / HZ; | |
406 | mld2q->mld2q_mca = *grp; | |
407 | mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, | |
408 | sizeof(*mld2q), | |
409 | IPPROTO_ICMPV6, | |
410 | csum_partial(mld2q, | |
411 | sizeof(*mld2q), | |
412 | 0)); | |
413 | break; | |
414 | } | |
415 | skb_put(skb, mld_hdr_size); | |
08b202b6 YH |
416 | |
417 | __skb_pull(skb, sizeof(*eth)); | |
418 | ||
419 | out: | |
420 | return skb; | |
421 | } | |
422 | #endif | |
423 | ||
8ef2a9a5 | 424 | static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br, |
1080ab95 NA |
425 | struct br_ip *addr, |
426 | u8 *igmp_type) | |
8ef2a9a5 YH |
427 | { |
428 | switch (addr->proto) { | |
429 | case htons(ETH_P_IP): | |
1080ab95 | 430 | return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type); |
dfd56b8b | 431 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 432 | case htons(ETH_P_IPV6): |
1080ab95 NA |
433 | return br_ip6_multicast_alloc_query(br, &addr->u.ip6, |
434 | igmp_type); | |
08b202b6 | 435 | #endif |
8ef2a9a5 YH |
436 | } |
437 | return NULL; | |
438 | } | |
439 | ||
cfd56754 | 440 | struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, |
5e923585 | 441 | struct br_ip *group) |
eb1d1641 | 442 | { |
eb1d1641 | 443 | struct net_bridge_mdb_entry *mp; |
4c0833bc | 444 | int err; |
eb1d1641 | 445 | |
19e3a9c9 NA |
446 | mp = br_mdb_ip_get(br, group); |
447 | if (mp) | |
448 | return mp; | |
eb1d1641 | 449 | |
19e3a9c9 NA |
450 | if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) { |
451 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false); | |
452 | return ERR_PTR(-E2BIG); | |
eb1d1641 HX |
453 | } |
454 | ||
455 | mp = kzalloc(sizeof(*mp), GFP_ATOMIC); | |
456 | if (unlikely(!mp)) | |
4c0833bc | 457 | return ERR_PTR(-ENOMEM); |
eb1d1641 HX |
458 | |
459 | mp->br = br; | |
8ef2a9a5 | 460 | mp->addr = *group; |
88c1f37f | 461 | timer_setup(&mp->timer, br_multicast_group_expired, 0); |
19e3a9c9 NA |
462 | err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode, |
463 | br_mdb_rht_params); | |
464 | if (err) { | |
465 | kfree(mp); | |
466 | mp = ERR_PTR(err); | |
467 | } else { | |
468 | hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list); | |
469 | } | |
1faabf2a | 470 | |
eb1d1641 HX |
471 | return mp; |
472 | } | |
473 | ||
cfd56754 CW |
474 | struct net_bridge_port_group *br_multicast_new_port_group( |
475 | struct net_bridge_port *port, | |
476 | struct br_ip *group, | |
ccb1c31a | 477 | struct net_bridge_port_group __rcu *next, |
6db6f0ea FF |
478 | unsigned char flags, |
479 | const unsigned char *src) | |
cfd56754 CW |
480 | { |
481 | struct net_bridge_port_group *p; | |
482 | ||
483 | p = kzalloc(sizeof(*p), GFP_ATOMIC); | |
484 | if (unlikely(!p)) | |
485 | return NULL; | |
486 | ||
487 | p->addr = *group; | |
488 | p->port = port; | |
9d06b6d8 | 489 | p->flags = flags; |
eca2a43b | 490 | rcu_assign_pointer(p->next, next); |
cfd56754 | 491 | hlist_add_head(&p->mglist, &port->mglist); |
88c1f37f | 492 | timer_setup(&p->timer, br_multicast_port_group_expired, 0); |
6db6f0ea FF |
493 | |
494 | if (src) | |
495 | memcpy(p->eth_addr, src, ETH_ALEN); | |
496 | else | |
1bfe45f4 | 497 | eth_broadcast_addr(p->eth_addr); |
6db6f0ea | 498 | |
cfd56754 CW |
499 | return p; |
500 | } | |
501 | ||
6db6f0ea FF |
502 | static bool br_port_group_equal(struct net_bridge_port_group *p, |
503 | struct net_bridge_port *port, | |
504 | const unsigned char *src) | |
505 | { | |
506 | if (p->port != port) | |
507 | return false; | |
508 | ||
509 | if (!(port->flags & BR_MULTICAST_TO_UNICAST)) | |
510 | return true; | |
511 | ||
512 | return ether_addr_equal(src, p->eth_addr); | |
513 | } | |
514 | ||
eb1d1641 | 515 | static int br_multicast_add_group(struct net_bridge *br, |
8ef2a9a5 | 516 | struct net_bridge_port *port, |
6db6f0ea FF |
517 | struct br_ip *group, |
518 | const unsigned char *src) | |
eb1d1641 | 519 | { |
e8051688 | 520 | struct net_bridge_port_group __rcu **pp; |
5e923585 NA |
521 | struct net_bridge_port_group *p; |
522 | struct net_bridge_mdb_entry *mp; | |
454594f3 | 523 | unsigned long now = jiffies; |
eb1d1641 HX |
524 | int err; |
525 | ||
eb1d1641 HX |
526 | spin_lock(&br->multicast_lock); |
527 | if (!netif_running(br->dev) || | |
528 | (port && port->state == BR_STATE_DISABLED)) | |
529 | goto out; | |
530 | ||
19e3a9c9 | 531 | mp = br_multicast_new_group(br, group); |
eb1d1641 | 532 | err = PTR_ERR(mp); |
4c0833bc | 533 | if (IS_ERR(mp)) |
eb1d1641 HX |
534 | goto err; |
535 | ||
536 | if (!port) { | |
2a26028d AL |
537 | if (!mp->host_joined) { |
538 | mp->host_joined = true; | |
539 | br_mdb_notify(br->dev, NULL, &mp->addr, RTM_NEWMDB, 0); | |
540 | } | |
454594f3 | 541 | mod_timer(&mp->timer, now + br->multicast_membership_interval); |
eb1d1641 HX |
542 | goto out; |
543 | } | |
544 | ||
e8051688 ED |
545 | for (pp = &mp->ports; |
546 | (p = mlock_dereference(*pp, br)) != NULL; | |
547 | pp = &p->next) { | |
6db6f0ea | 548 | if (br_port_group_equal(p, port, src)) |
454594f3 | 549 | goto found; |
eb1d1641 HX |
550 | if ((unsigned long)p->port < (unsigned long)port) |
551 | break; | |
552 | } | |
553 | ||
6db6f0ea | 554 | p = br_multicast_new_port_group(port, group, *pp, 0, src); |
eb1d1641 HX |
555 | if (unlikely(!p)) |
556 | goto err; | |
eb1d1641 | 557 | rcu_assign_pointer(*pp, p); |
45ebcce5 | 558 | br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0); |
eb1d1641 | 559 | |
454594f3 LL |
560 | found: |
561 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
eb1d1641 HX |
562 | out: |
563 | err = 0; | |
564 | ||
565 | err: | |
566 | spin_unlock(&br->multicast_lock); | |
567 | return err; | |
568 | } | |
569 | ||
8ef2a9a5 YH |
570 | static int br_ip4_multicast_add_group(struct net_bridge *br, |
571 | struct net_bridge_port *port, | |
b0e9a30d | 572 | __be32 group, |
6db6f0ea FF |
573 | __u16 vid, |
574 | const unsigned char *src) | |
8ef2a9a5 YH |
575 | { |
576 | struct br_ip br_group; | |
577 | ||
578 | if (ipv4_is_local_multicast(group)) | |
579 | return 0; | |
580 | ||
1515a63f | 581 | memset(&br_group, 0, sizeof(br_group)); |
8ef2a9a5 YH |
582 | br_group.u.ip4 = group; |
583 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 584 | br_group.vid = vid; |
8ef2a9a5 | 585 | |
6db6f0ea | 586 | return br_multicast_add_group(br, port, &br_group, src); |
8ef2a9a5 YH |
587 | } |
588 | ||
dfd56b8b | 589 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
590 | static int br_ip6_multicast_add_group(struct net_bridge *br, |
591 | struct net_bridge_port *port, | |
b0e9a30d | 592 | const struct in6_addr *group, |
6db6f0ea FF |
593 | __u16 vid, |
594 | const unsigned char *src) | |
08b202b6 YH |
595 | { |
596 | struct br_ip br_group; | |
597 | ||
3c3769e6 | 598 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
599 | return 0; |
600 | ||
19e3a9c9 | 601 | memset(&br_group, 0, sizeof(br_group)); |
4e3fd7a0 | 602 | br_group.u.ip6 = *group; |
9cc6e0c4 | 603 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 604 | br_group.vid = vid; |
08b202b6 | 605 | |
6db6f0ea | 606 | return br_multicast_add_group(br, port, &br_group, src); |
08b202b6 YH |
607 | } |
608 | #endif | |
609 | ||
88c1f37f | 610 | static void br_multicast_router_expired(struct timer_list *t) |
eb1d1641 | 611 | { |
88c1f37f AP |
612 | struct net_bridge_port *port = |
613 | from_timer(port, t, multicast_router_timer); | |
eb1d1641 HX |
614 | struct net_bridge *br = port->br; |
615 | ||
616 | spin_lock(&br->multicast_lock); | |
a55d8246 NA |
617 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
618 | port->multicast_router == MDB_RTR_TYPE_PERM || | |
f12e7d95 | 619 | timer_pending(&port->multicast_router_timer)) |
eb1d1641 HX |
620 | goto out; |
621 | ||
f12e7d95 | 622 | __del_port_router(port); |
eb1d1641 HX |
623 | out: |
624 | spin_unlock(&br->multicast_lock); | |
625 | } | |
626 | ||
77041420 YG |
627 | static void br_mc_router_state_change(struct net_bridge *p, |
628 | bool is_mc_router) | |
629 | { | |
630 | struct switchdev_attr attr = { | |
631 | .orig_dev = p->dev, | |
632 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER, | |
633 | .flags = SWITCHDEV_F_DEFER, | |
634 | .u.mrouter = is_mc_router, | |
635 | }; | |
636 | ||
637 | switchdev_port_attr_set(p->dev, &attr); | |
638 | } | |
639 | ||
88c1f37f | 640 | static void br_multicast_local_router_expired(struct timer_list *t) |
eb1d1641 | 641 | { |
88c1f37f | 642 | struct net_bridge *br = from_timer(br, t, multicast_router_timer); |
77041420 YG |
643 | |
644 | spin_lock(&br->multicast_lock); | |
645 | if (br->multicast_router == MDB_RTR_TYPE_DISABLED || | |
646 | br->multicast_router == MDB_RTR_TYPE_PERM || | |
647 | timer_pending(&br->multicast_router_timer)) | |
648 | goto out; | |
649 | ||
650 | br_mc_router_state_change(br, false); | |
651 | out: | |
652 | spin_unlock(&br->multicast_lock); | |
eb1d1641 HX |
653 | } |
654 | ||
cc0fdd80 | 655 | static void br_multicast_querier_expired(struct net_bridge *br, |
90010b36 | 656 | struct bridge_mcast_own_query *query) |
c83b8fab | 657 | { |
c83b8fab | 658 | spin_lock(&br->multicast_lock); |
13cefad2 | 659 | if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
c83b8fab HX |
660 | goto out; |
661 | ||
cc0fdd80 | 662 | br_multicast_start_querier(br, query); |
c83b8fab HX |
663 | |
664 | out: | |
665 | spin_unlock(&br->multicast_lock); | |
666 | } | |
667 | ||
88c1f37f | 668 | static void br_ip4_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 669 | { |
88c1f37f | 670 | struct net_bridge *br = from_timer(br, t, ip4_other_query.timer); |
cc0fdd80 | 671 | |
90010b36 | 672 | br_multicast_querier_expired(br, &br->ip4_own_query); |
cc0fdd80 LL |
673 | } |
674 | ||
675 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 676 | static void br_ip6_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 677 | { |
88c1f37f | 678 | struct net_bridge *br = from_timer(br, t, ip6_other_query.timer); |
cc0fdd80 | 679 | |
90010b36 | 680 | br_multicast_querier_expired(br, &br->ip6_own_query); |
cc0fdd80 LL |
681 | } |
682 | #endif | |
683 | ||
dc4eb53a LL |
684 | static void br_multicast_select_own_querier(struct net_bridge *br, |
685 | struct br_ip *ip, | |
686 | struct sk_buff *skb) | |
687 | { | |
688 | if (ip->proto == htons(ETH_P_IP)) | |
689 | br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr; | |
690 | #if IS_ENABLED(CONFIG_IPV6) | |
691 | else | |
692 | br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr; | |
693 | #endif | |
694 | } | |
695 | ||
8ef2a9a5 YH |
696 | static void __br_multicast_send_query(struct net_bridge *br, |
697 | struct net_bridge_port *port, | |
698 | struct br_ip *ip) | |
eb1d1641 | 699 | { |
eb1d1641 | 700 | struct sk_buff *skb; |
1080ab95 | 701 | u8 igmp_type; |
eb1d1641 | 702 | |
1080ab95 | 703 | skb = br_multicast_alloc_query(br, ip, &igmp_type); |
eb1d1641 | 704 | if (!skb) |
8ef2a9a5 | 705 | return; |
eb1d1641 HX |
706 | |
707 | if (port) { | |
eb1d1641 | 708 | skb->dev = port->dev; |
a65056ec | 709 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 710 | BR_MCAST_DIR_TX); |
29a26a56 EB |
711 | NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, |
712 | dev_net(port->dev), NULL, skb, NULL, skb->dev, | |
f0b4eece | 713 | br_dev_queue_push_xmit); |
dc4eb53a LL |
714 | } else { |
715 | br_multicast_select_own_querier(br, ip, skb); | |
a65056ec | 716 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 717 | BR_MCAST_DIR_RX); |
eb1d1641 | 718 | netif_rx(skb); |
dc4eb53a | 719 | } |
8ef2a9a5 YH |
720 | } |
721 | ||
722 | static void br_multicast_send_query(struct net_bridge *br, | |
cc0fdd80 | 723 | struct net_bridge_port *port, |
90010b36 | 724 | struct bridge_mcast_own_query *own_query) |
8ef2a9a5 | 725 | { |
90010b36 | 726 | struct bridge_mcast_other_query *other_query = NULL; |
5e923585 NA |
727 | struct br_ip br_group; |
728 | unsigned long time; | |
8ef2a9a5 | 729 | |
13cefad2 NA |
730 | if (!netif_running(br->dev) || |
731 | !br_opt_get(br, BROPT_MULTICAST_ENABLED) || | |
675779ad | 732 | !br_opt_get(br, BROPT_MULTICAST_QUERIER)) |
8ef2a9a5 YH |
733 | return; |
734 | ||
08b202b6 YH |
735 | memset(&br_group.u, 0, sizeof(br_group.u)); |
736 | ||
90010b36 LL |
737 | if (port ? (own_query == &port->ip4_own_query) : |
738 | (own_query == &br->ip4_own_query)) { | |
739 | other_query = &br->ip4_other_query; | |
cc0fdd80 | 740 | br_group.proto = htons(ETH_P_IP); |
dfd56b8b | 741 | #if IS_ENABLED(CONFIG_IPV6) |
cc0fdd80 | 742 | } else { |
90010b36 | 743 | other_query = &br->ip6_other_query; |
cc0fdd80 | 744 | br_group.proto = htons(ETH_P_IPV6); |
08b202b6 | 745 | #endif |
cc0fdd80 LL |
746 | } |
747 | ||
90010b36 | 748 | if (!other_query || timer_pending(&other_query->timer)) |
cc0fdd80 LL |
749 | return; |
750 | ||
751 | __br_multicast_send_query(br, port, &br_group); | |
eb1d1641 | 752 | |
eb1d1641 | 753 | time = jiffies; |
90010b36 | 754 | time += own_query->startup_sent < br->multicast_startup_query_count ? |
eb1d1641 HX |
755 | br->multicast_startup_query_interval : |
756 | br->multicast_query_interval; | |
90010b36 | 757 | mod_timer(&own_query->timer, time); |
eb1d1641 HX |
758 | } |
759 | ||
90010b36 LL |
760 | static void |
761 | br_multicast_port_query_expired(struct net_bridge_port *port, | |
762 | struct bridge_mcast_own_query *query) | |
eb1d1641 | 763 | { |
eb1d1641 HX |
764 | struct net_bridge *br = port->br; |
765 | ||
766 | spin_lock(&br->multicast_lock); | |
02a780c0 DC |
767 | if (port->state == BR_STATE_DISABLED || |
768 | port->state == BR_STATE_BLOCKING) | |
eb1d1641 HX |
769 | goto out; |
770 | ||
cc0fdd80 LL |
771 | if (query->startup_sent < br->multicast_startup_query_count) |
772 | query->startup_sent++; | |
eb1d1641 | 773 | |
cc0fdd80 | 774 | br_multicast_send_query(port->br, port, query); |
eb1d1641 HX |
775 | |
776 | out: | |
777 | spin_unlock(&br->multicast_lock); | |
778 | } | |
779 | ||
88c1f37f | 780 | static void br_ip4_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 781 | { |
88c1f37f | 782 | struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer); |
cc0fdd80 | 783 | |
90010b36 | 784 | br_multicast_port_query_expired(port, &port->ip4_own_query); |
cc0fdd80 LL |
785 | } |
786 | ||
787 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 788 | static void br_ip6_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 789 | { |
88c1f37f | 790 | struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer); |
cc0fdd80 | 791 | |
90010b36 | 792 | br_multicast_port_query_expired(port, &port->ip6_own_query); |
cc0fdd80 LL |
793 | } |
794 | #endif | |
795 | ||
147c1e9b NF |
796 | static void br_mc_disabled_update(struct net_device *dev, bool value) |
797 | { | |
798 | struct switchdev_attr attr = { | |
799 | .orig_dev = dev, | |
800 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED, | |
801 | .flags = SWITCHDEV_F_DEFER, | |
13cefad2 | 802 | .u.mc_disabled = !value, |
147c1e9b NF |
803 | }; |
804 | ||
805 | switchdev_port_attr_set(dev, &attr); | |
806 | } | |
807 | ||
1080ab95 | 808 | int br_multicast_add_port(struct net_bridge_port *port) |
eb1d1641 | 809 | { |
7f0aec7a | 810 | port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
eb1d1641 | 811 | |
88c1f37f AP |
812 | timer_setup(&port->multicast_router_timer, |
813 | br_multicast_router_expired, 0); | |
814 | timer_setup(&port->ip4_own_query.timer, | |
815 | br_ip4_multicast_port_query_expired, 0); | |
cc0fdd80 | 816 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f AP |
817 | timer_setup(&port->ip6_own_query.timer, |
818 | br_ip6_multicast_port_query_expired, 0); | |
cc0fdd80 | 819 | #endif |
13cefad2 NA |
820 | br_mc_disabled_update(port->dev, |
821 | br_opt_get(port->br, BROPT_MULTICAST_ENABLED)); | |
147c1e9b | 822 | |
1080ab95 NA |
823 | port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); |
824 | if (!port->mcast_stats) | |
825 | return -ENOMEM; | |
826 | ||
827 | return 0; | |
eb1d1641 HX |
828 | } |
829 | ||
830 | void br_multicast_del_port(struct net_bridge_port *port) | |
831 | { | |
e10177ab SA |
832 | struct net_bridge *br = port->br; |
833 | struct net_bridge_port_group *pg; | |
834 | struct hlist_node *n; | |
835 | ||
836 | /* Take care of the remaining groups, only perm ones should be left */ | |
837 | spin_lock_bh(&br->multicast_lock); | |
838 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) | |
839 | br_multicast_del_pg(br, pg); | |
840 | spin_unlock_bh(&br->multicast_lock); | |
eb1d1641 | 841 | del_timer_sync(&port->multicast_router_timer); |
1080ab95 | 842 | free_percpu(port->mcast_stats); |
eb1d1641 HX |
843 | } |
844 | ||
90010b36 | 845 | static void br_multicast_enable(struct bridge_mcast_own_query *query) |
561f1103 | 846 | { |
cc0fdd80 | 847 | query->startup_sent = 0; |
561f1103 | 848 | |
cc0fdd80 LL |
849 | if (try_to_del_timer_sync(&query->timer) >= 0 || |
850 | del_timer(&query->timer)) | |
851 | mod_timer(&query->timer, jiffies); | |
561f1103 HX |
852 | } |
853 | ||
7cb3f921 | 854 | static void __br_multicast_enable_port(struct net_bridge_port *port) |
eb1d1641 HX |
855 | { |
856 | struct net_bridge *br = port->br; | |
857 | ||
13cefad2 | 858 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev)) |
7cb3f921 | 859 | return; |
eb1d1641 | 860 | |
90010b36 | 861 | br_multicast_enable(&port->ip4_own_query); |
cc0fdd80 | 862 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 863 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 864 | #endif |
7f0aec7a NA |
865 | if (port->multicast_router == MDB_RTR_TYPE_PERM && |
866 | hlist_unhashed(&port->rlist)) | |
754bc547 | 867 | br_multicast_add_router(br, port); |
7cb3f921 | 868 | } |
eb1d1641 | 869 | |
7cb3f921 NA |
870 | void br_multicast_enable_port(struct net_bridge_port *port) |
871 | { | |
872 | struct net_bridge *br = port->br; | |
873 | ||
874 | spin_lock(&br->multicast_lock); | |
875 | __br_multicast_enable_port(port); | |
eb1d1641 HX |
876 | spin_unlock(&br->multicast_lock); |
877 | } | |
878 | ||
879 | void br_multicast_disable_port(struct net_bridge_port *port) | |
880 | { | |
881 | struct net_bridge *br = port->br; | |
882 | struct net_bridge_port_group *pg; | |
b67bfe0d | 883 | struct hlist_node *n; |
eb1d1641 HX |
884 | |
885 | spin_lock(&br->multicast_lock); | |
b67bfe0d | 886 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) |
9d06b6d8 | 887 | if (!(pg->flags & MDB_PG_FLAGS_PERMANENT)) |
e10177ab | 888 | br_multicast_del_pg(br, pg); |
eb1d1641 | 889 | |
f12e7d95 NF |
890 | __del_port_router(port); |
891 | ||
eb1d1641 | 892 | del_timer(&port->multicast_router_timer); |
90010b36 | 893 | del_timer(&port->ip4_own_query.timer); |
cc0fdd80 | 894 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 895 | del_timer(&port->ip6_own_query.timer); |
cc0fdd80 | 896 | #endif |
eb1d1641 HX |
897 | spin_unlock(&br->multicast_lock); |
898 | } | |
899 | ||
8ef2a9a5 YH |
900 | static int br_ip4_multicast_igmp3_report(struct net_bridge *br, |
901 | struct net_bridge_port *port, | |
06499098 VY |
902 | struct sk_buff *skb, |
903 | u16 vid) | |
eb1d1641 | 904 | { |
6db6f0ea | 905 | const unsigned char *src; |
eb1d1641 HX |
906 | struct igmpv3_report *ih; |
907 | struct igmpv3_grec *grec; | |
908 | int i; | |
909 | int len; | |
910 | int num; | |
911 | int type; | |
912 | int err = 0; | |
913 | __be32 group; | |
e57f6185 | 914 | u16 nsrcs; |
eb1d1641 | 915 | |
eb1d1641 HX |
916 | ih = igmpv3_report_hdr(skb); |
917 | num = ntohs(ih->ngrec); | |
c2d4fbd2 | 918 | len = skb_transport_offset(skb) + sizeof(*ih); |
eb1d1641 HX |
919 | |
920 | for (i = 0; i < num; i++) { | |
921 | len += sizeof(*grec); | |
ba5ea614 | 922 | if (!ip_mc_may_pull(skb, len)) |
eb1d1641 HX |
923 | return -EINVAL; |
924 | ||
fd218cf9 | 925 | grec = (void *)(skb->data + len - sizeof(*grec)); |
eb1d1641 HX |
926 | group = grec->grec_mca; |
927 | type = grec->grec_type; | |
e57f6185 | 928 | nsrcs = ntohs(grec->grec_nsrcs); |
eb1d1641 | 929 | |
e57f6185 | 930 | len += nsrcs * 4; |
ba5ea614 | 931 | if (!ip_mc_may_pull(skb, len)) |
eb1d1641 HX |
932 | return -EINVAL; |
933 | ||
934 | /* We treat this as an IGMPv2 report for now. */ | |
935 | switch (type) { | |
936 | case IGMPV3_MODE_IS_INCLUDE: | |
937 | case IGMPV3_MODE_IS_EXCLUDE: | |
938 | case IGMPV3_CHANGE_TO_INCLUDE: | |
939 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
940 | case IGMPV3_ALLOW_NEW_SOURCES: | |
941 | case IGMPV3_BLOCK_OLD_SOURCES: | |
942 | break; | |
943 | ||
944 | default: | |
945 | continue; | |
946 | } | |
947 | ||
6db6f0ea | 948 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
949 | if ((type == IGMPV3_CHANGE_TO_INCLUDE || |
950 | type == IGMPV3_MODE_IS_INCLUDE) && | |
e57f6185 | 951 | nsrcs == 0) { |
6db6f0ea | 952 | br_ip4_multicast_leave_group(br, port, group, vid, src); |
bc8c20ac | 953 | } else { |
6db6f0ea FF |
954 | err = br_ip4_multicast_add_group(br, port, group, vid, |
955 | src); | |
bc8c20ac SA |
956 | if (err) |
957 | break; | |
958 | } | |
eb1d1641 HX |
959 | } |
960 | ||
961 | return err; | |
962 | } | |
963 | ||
dfd56b8b | 964 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
965 | static int br_ip6_multicast_mld2_report(struct net_bridge *br, |
966 | struct net_bridge_port *port, | |
06499098 VY |
967 | struct sk_buff *skb, |
968 | u16 vid) | |
08b202b6 | 969 | { |
ba5ea614 | 970 | unsigned int nsrcs_offset; |
6db6f0ea | 971 | const unsigned char *src; |
08b202b6 YH |
972 | struct icmp6hdr *icmp6h; |
973 | struct mld2_grec *grec; | |
ba5ea614 | 974 | unsigned int grec_len; |
08b202b6 YH |
975 | int i; |
976 | int len; | |
977 | int num; | |
978 | int err = 0; | |
979 | ||
ba5ea614 | 980 | if (!ipv6_mc_may_pull(skb, sizeof(*icmp6h))) |
08b202b6 YH |
981 | return -EINVAL; |
982 | ||
983 | icmp6h = icmp6_hdr(skb); | |
984 | num = ntohs(icmp6h->icmp6_dataun.un_data16[1]); | |
c2d4fbd2 | 985 | len = skb_transport_offset(skb) + sizeof(*icmp6h); |
08b202b6 YH |
986 | |
987 | for (i = 0; i < num; i++) { | |
e57f6185 NA |
988 | __be16 *_nsrcs, __nsrcs; |
989 | u16 nsrcs; | |
08b202b6 | 990 | |
ba5ea614 LL |
991 | nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs); |
992 | ||
993 | if (skb_transport_offset(skb) + ipv6_transport_len(skb) < | |
994 | nsrcs_offset + sizeof(_nsrcs)) | |
995 | return -EINVAL; | |
996 | ||
e57f6185 NA |
997 | _nsrcs = skb_header_pointer(skb, nsrcs_offset, |
998 | sizeof(__nsrcs), &__nsrcs); | |
999 | if (!_nsrcs) | |
08b202b6 YH |
1000 | return -EINVAL; |
1001 | ||
e57f6185 NA |
1002 | nsrcs = ntohs(*_nsrcs); |
1003 | grec_len = struct_size(grec, grec_src, nsrcs); | |
ba5ea614 LL |
1004 | |
1005 | if (!ipv6_mc_may_pull(skb, len + grec_len)) | |
08b202b6 YH |
1006 | return -EINVAL; |
1007 | ||
1008 | grec = (struct mld2_grec *)(skb->data + len); | |
ba5ea614 | 1009 | len += grec_len; |
08b202b6 YH |
1010 | |
1011 | /* We treat these as MLDv1 reports for now. */ | |
1012 | switch (grec->grec_type) { | |
1013 | case MLD2_MODE_IS_INCLUDE: | |
1014 | case MLD2_MODE_IS_EXCLUDE: | |
1015 | case MLD2_CHANGE_TO_INCLUDE: | |
1016 | case MLD2_CHANGE_TO_EXCLUDE: | |
1017 | case MLD2_ALLOW_NEW_SOURCES: | |
1018 | case MLD2_BLOCK_OLD_SOURCES: | |
1019 | break; | |
1020 | ||
1021 | default: | |
1022 | continue; | |
1023 | } | |
1024 | ||
6db6f0ea | 1025 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
1026 | if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE || |
1027 | grec->grec_type == MLD2_MODE_IS_INCLUDE) && | |
e57f6185 | 1028 | nsrcs == 0) { |
bc8c20ac | 1029 | br_ip6_multicast_leave_group(br, port, &grec->grec_mca, |
6db6f0ea | 1030 | vid, src); |
bc8c20ac SA |
1031 | } else { |
1032 | err = br_ip6_multicast_add_group(br, port, | |
6db6f0ea FF |
1033 | &grec->grec_mca, vid, |
1034 | src); | |
9264251e | 1035 | if (err) |
bc8c20ac SA |
1036 | break; |
1037 | } | |
08b202b6 YH |
1038 | } |
1039 | ||
1040 | return err; | |
1041 | } | |
1042 | #endif | |
1043 | ||
dc4eb53a | 1044 | static bool br_ip4_multicast_select_querier(struct net_bridge *br, |
2cd41431 | 1045 | struct net_bridge_port *port, |
dc4eb53a LL |
1046 | __be32 saddr) |
1047 | { | |
1048 | if (!timer_pending(&br->ip4_own_query.timer) && | |
1049 | !timer_pending(&br->ip4_other_query.timer)) | |
1050 | goto update; | |
1051 | ||
1052 | if (!br->ip4_querier.addr.u.ip4) | |
1053 | goto update; | |
1054 | ||
1055 | if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4)) | |
1056 | goto update; | |
1057 | ||
1058 | return false; | |
1059 | ||
1060 | update: | |
1061 | br->ip4_querier.addr.u.ip4 = saddr; | |
1062 | ||
2cd41431 LL |
1063 | /* update protected by general multicast_lock by caller */ |
1064 | rcu_assign_pointer(br->ip4_querier.port, port); | |
1065 | ||
dc4eb53a LL |
1066 | return true; |
1067 | } | |
1068 | ||
1069 | #if IS_ENABLED(CONFIG_IPV6) | |
1070 | static bool br_ip6_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1071 | struct net_bridge_port *port, |
dc4eb53a LL |
1072 | struct in6_addr *saddr) |
1073 | { | |
1074 | if (!timer_pending(&br->ip6_own_query.timer) && | |
1075 | !timer_pending(&br->ip6_other_query.timer)) | |
1076 | goto update; | |
1077 | ||
1078 | if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0) | |
1079 | goto update; | |
1080 | ||
1081 | return false; | |
1082 | ||
1083 | update: | |
1084 | br->ip6_querier.addr.u.ip6 = *saddr; | |
1085 | ||
2cd41431 LL |
1086 | /* update protected by general multicast_lock by caller */ |
1087 | rcu_assign_pointer(br->ip6_querier.port, port); | |
1088 | ||
dc4eb53a LL |
1089 | return true; |
1090 | } | |
1091 | #endif | |
1092 | ||
1093 | static bool br_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 1094 | struct net_bridge_port *port, |
dc4eb53a LL |
1095 | struct br_ip *saddr) |
1096 | { | |
1097 | switch (saddr->proto) { | |
1098 | case htons(ETH_P_IP): | |
2cd41431 | 1099 | return br_ip4_multicast_select_querier(br, port, saddr->u.ip4); |
dc4eb53a LL |
1100 | #if IS_ENABLED(CONFIG_IPV6) |
1101 | case htons(ETH_P_IPV6): | |
2cd41431 | 1102 | return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6); |
dc4eb53a LL |
1103 | #endif |
1104 | } | |
1105 | ||
1106 | return false; | |
1107 | } | |
1108 | ||
cc0fdd80 | 1109 | static void |
90010b36 LL |
1110 | br_multicast_update_query_timer(struct net_bridge *br, |
1111 | struct bridge_mcast_other_query *query, | |
1112 | unsigned long max_delay) | |
b00589af | 1113 | { |
90010b36 LL |
1114 | if (!timer_pending(&query->timer)) |
1115 | query->delay_time = jiffies + max_delay; | |
b00589af | 1116 | |
90010b36 | 1117 | mod_timer(&query->timer, jiffies + br->multicast_querier_interval); |
b00589af LL |
1118 | } |
1119 | ||
6d549648 NF |
1120 | static void br_port_mc_router_state_change(struct net_bridge_port *p, |
1121 | bool is_mc_router) | |
1122 | { | |
1123 | struct switchdev_attr attr = { | |
1124 | .orig_dev = p->dev, | |
1125 | .id = SWITCHDEV_ATTR_ID_PORT_MROUTER, | |
1126 | .flags = SWITCHDEV_F_DEFER, | |
1127 | .u.mrouter = is_mc_router, | |
1128 | }; | |
1129 | ||
1130 | switchdev_port_attr_set(p->dev, &attr); | |
1131 | } | |
1132 | ||
7e80c124 | 1133 | /* |
7c77602f | 1134 | * Add port to router_list |
7e80c124 | 1135 | * list is maintained ordered by pointer value |
1136 | * and locked by br->multicast_lock and RCU | |
1137 | */ | |
0909e117 HX |
1138 | static void br_multicast_add_router(struct net_bridge *br, |
1139 | struct net_bridge_port *port) | |
1140 | { | |
dcdca2c4 | 1141 | struct net_bridge_port *p; |
b67bfe0d | 1142 | struct hlist_node *slot = NULL; |
dcdca2c4 | 1143 | |
1a040eac NA |
1144 | if (!hlist_unhashed(&port->rlist)) |
1145 | return; | |
1146 | ||
b67bfe0d | 1147 | hlist_for_each_entry(p, &br->router_list, rlist) { |
7e80c124 | 1148 | if ((unsigned long) port >= (unsigned long) p) |
1149 | break; | |
b67bfe0d | 1150 | slot = &p->rlist; |
dcdca2c4 | 1151 | } |
1152 | ||
7e80c124 | 1153 | if (slot) |
1d023284 | 1154 | hlist_add_behind_rcu(&port->rlist, slot); |
dcdca2c4 | 1155 | else |
1156 | hlist_add_head_rcu(&port->rlist, &br->router_list); | |
949f1e39 | 1157 | br_rtr_notify(br->dev, port, RTM_NEWMDB); |
6d549648 | 1158 | br_port_mc_router_state_change(port, true); |
0909e117 HX |
1159 | } |
1160 | ||
eb1d1641 HX |
1161 | static void br_multicast_mark_router(struct net_bridge *br, |
1162 | struct net_bridge_port *port) | |
1163 | { | |
1164 | unsigned long now = jiffies; | |
eb1d1641 HX |
1165 | |
1166 | if (!port) { | |
77041420 YG |
1167 | if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) { |
1168 | if (!timer_pending(&br->multicast_router_timer)) | |
1169 | br_mc_router_state_change(br, true); | |
eb1d1641 HX |
1170 | mod_timer(&br->multicast_router_timer, |
1171 | now + br->multicast_querier_interval); | |
77041420 | 1172 | } |
eb1d1641 HX |
1173 | return; |
1174 | } | |
1175 | ||
a55d8246 NA |
1176 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
1177 | port->multicast_router == MDB_RTR_TYPE_PERM) | |
eb1d1641 HX |
1178 | return; |
1179 | ||
0909e117 | 1180 | br_multicast_add_router(br, port); |
eb1d1641 | 1181 | |
eb1d1641 HX |
1182 | mod_timer(&port->multicast_router_timer, |
1183 | now + br->multicast_querier_interval); | |
1184 | } | |
1185 | ||
1186 | static void br_multicast_query_received(struct net_bridge *br, | |
1187 | struct net_bridge_port *port, | |
90010b36 | 1188 | struct bridge_mcast_other_query *query, |
dc4eb53a | 1189 | struct br_ip *saddr, |
b00589af | 1190 | unsigned long max_delay) |
eb1d1641 | 1191 | { |
2cd41431 | 1192 | if (!br_multicast_select_querier(br, port, saddr)) |
eb1d1641 HX |
1193 | return; |
1194 | ||
dc4eb53a | 1195 | br_multicast_update_query_timer(br, query, max_delay); |
278e2148 | 1196 | br_multicast_mark_router(br, port); |
eb1d1641 HX |
1197 | } |
1198 | ||
9c2e955c | 1199 | static void br_ip4_multicast_query(struct net_bridge *br, |
1200 | struct net_bridge_port *port, | |
1201 | struct sk_buff *skb, | |
1202 | u16 vid) | |
eb1d1641 | 1203 | { |
ba5ea614 | 1204 | unsigned int transport_len = ip_transport_len(skb); |
b71d1d42 | 1205 | const struct iphdr *iph = ip_hdr(skb); |
eb1d1641 HX |
1206 | struct igmphdr *ih = igmp_hdr(skb); |
1207 | struct net_bridge_mdb_entry *mp; | |
1208 | struct igmpv3_query *ih3; | |
1209 | struct net_bridge_port_group *p; | |
e8051688 | 1210 | struct net_bridge_port_group __rcu **pp; |
dc4eb53a | 1211 | struct br_ip saddr; |
eb1d1641 HX |
1212 | unsigned long max_delay; |
1213 | unsigned long now = jiffies; | |
1214 | __be32 group; | |
1215 | ||
1216 | spin_lock(&br->multicast_lock); | |
1217 | if (!netif_running(br->dev) || | |
1218 | (port && port->state == BR_STATE_DISABLED)) | |
1219 | goto out; | |
1220 | ||
eb1d1641 HX |
1221 | group = ih->group; |
1222 | ||
ba5ea614 | 1223 | if (transport_len == sizeof(*ih)) { |
eb1d1641 HX |
1224 | max_delay = ih->code * (HZ / IGMP_TIMER_SCALE); |
1225 | ||
1226 | if (!max_delay) { | |
1227 | max_delay = 10 * HZ; | |
1228 | group = 0; | |
1229 | } | |
ba5ea614 | 1230 | } else if (transport_len >= sizeof(*ih3)) { |
eb1d1641 HX |
1231 | ih3 = igmpv3_query_hdr(skb); |
1232 | if (ih3->nsrcs) | |
bec68ff1 | 1233 | goto out; |
eb1d1641 | 1234 | |
0ba8c9ec YH |
1235 | max_delay = ih3->code ? |
1236 | IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1; | |
9afd85c9 | 1237 | } else { |
9ed973cc LL |
1238 | goto out; |
1239 | } | |
1240 | ||
dc4eb53a LL |
1241 | if (!group) { |
1242 | saddr.proto = htons(ETH_P_IP); | |
1243 | saddr.u.ip4 = iph->saddr; | |
b00589af | 1244 | |
dc4eb53a LL |
1245 | br_multicast_query_received(br, port, &br->ip4_other_query, |
1246 | &saddr, max_delay); | |
eb1d1641 | 1247 | goto out; |
dc4eb53a | 1248 | } |
eb1d1641 | 1249 | |
19e3a9c9 | 1250 | mp = br_mdb_ip4_get(br, group, vid); |
eb1d1641 HX |
1251 | if (!mp) |
1252 | goto out; | |
1253 | ||
1254 | max_delay *= br->multicast_last_member_count; | |
1255 | ||
ff0fd34e | 1256 | if (mp->host_joined && |
eb1d1641 HX |
1257 | (timer_pending(&mp->timer) ? |
1258 | time_after(mp->timer.expires, now + max_delay) : | |
1259 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1260 | mod_timer(&mp->timer, now + max_delay); | |
1261 | ||
e8051688 ED |
1262 | for (pp = &mp->ports; |
1263 | (p = mlock_dereference(*pp, br)) != NULL; | |
1264 | pp = &p->next) { | |
eb1d1641 HX |
1265 | if (timer_pending(&p->timer) ? |
1266 | time_after(p->timer.expires, now + max_delay) : | |
1267 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1268 | mod_timer(&p->timer, now + max_delay); |
eb1d1641 HX |
1269 | } |
1270 | ||
1271 | out: | |
1272 | spin_unlock(&br->multicast_lock); | |
eb1d1641 HX |
1273 | } |
1274 | ||
dfd56b8b | 1275 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1276 | static int br_ip6_multicast_query(struct net_bridge *br, |
1277 | struct net_bridge_port *port, | |
06499098 VY |
1278 | struct sk_buff *skb, |
1279 | u16 vid) | |
08b202b6 | 1280 | { |
ba5ea614 | 1281 | unsigned int transport_len = ipv6_transport_len(skb); |
eca2a43b | 1282 | struct mld_msg *mld; |
08b202b6 YH |
1283 | struct net_bridge_mdb_entry *mp; |
1284 | struct mld2_query *mld2q; | |
e8051688 ED |
1285 | struct net_bridge_port_group *p; |
1286 | struct net_bridge_port_group __rcu **pp; | |
dc4eb53a | 1287 | struct br_ip saddr; |
08b202b6 YH |
1288 | unsigned long max_delay; |
1289 | unsigned long now = jiffies; | |
856ce5d0 | 1290 | unsigned int offset = skb_transport_offset(skb); |
b71d1d42 | 1291 | const struct in6_addr *group = NULL; |
9ed973cc | 1292 | bool is_general_query; |
08b202b6 YH |
1293 | int err = 0; |
1294 | ||
1295 | spin_lock(&br->multicast_lock); | |
1296 | if (!netif_running(br->dev) || | |
1297 | (port && port->state == BR_STATE_DISABLED)) | |
1298 | goto out; | |
1299 | ||
ba5ea614 | 1300 | if (transport_len == sizeof(*mld)) { |
856ce5d0 | 1301 | if (!pskb_may_pull(skb, offset + sizeof(*mld))) { |
08b202b6 YH |
1302 | err = -EINVAL; |
1303 | goto out; | |
1304 | } | |
1305 | mld = (struct mld_msg *) icmp6_hdr(skb); | |
4715213d | 1306 | max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay)); |
08b202b6 YH |
1307 | if (max_delay) |
1308 | group = &mld->mld_mca; | |
248ba8ec | 1309 | } else { |
856ce5d0 | 1310 | if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) { |
08b202b6 YH |
1311 | err = -EINVAL; |
1312 | goto out; | |
1313 | } | |
1314 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
1315 | if (!mld2q->mld2q_nsrcs) | |
1316 | group = &mld2q->mld2q_mca; | |
e3f5b170 DB |
1317 | |
1318 | max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL); | |
08b202b6 YH |
1319 | } |
1320 | ||
9ed973cc LL |
1321 | is_general_query = group && ipv6_addr_any(group); |
1322 | ||
dc4eb53a LL |
1323 | if (is_general_query) { |
1324 | saddr.proto = htons(ETH_P_IPV6); | |
3b26a5d0 | 1325 | saddr.u.ip6 = ipv6_hdr(skb)->saddr; |
b00589af | 1326 | |
dc4eb53a LL |
1327 | br_multicast_query_received(br, port, &br->ip6_other_query, |
1328 | &saddr, max_delay); | |
08b202b6 | 1329 | goto out; |
6c03ee8b LL |
1330 | } else if (!group) { |
1331 | goto out; | |
dc4eb53a | 1332 | } |
08b202b6 | 1333 | |
19e3a9c9 | 1334 | mp = br_mdb_ip6_get(br, group, vid); |
08b202b6 YH |
1335 | if (!mp) |
1336 | goto out; | |
1337 | ||
1338 | max_delay *= br->multicast_last_member_count; | |
ff0fd34e | 1339 | if (mp->host_joined && |
08b202b6 YH |
1340 | (timer_pending(&mp->timer) ? |
1341 | time_after(mp->timer.expires, now + max_delay) : | |
1342 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
1343 | mod_timer(&mp->timer, now + max_delay); | |
1344 | ||
e8051688 ED |
1345 | for (pp = &mp->ports; |
1346 | (p = mlock_dereference(*pp, br)) != NULL; | |
1347 | pp = &p->next) { | |
08b202b6 YH |
1348 | if (timer_pending(&p->timer) ? |
1349 | time_after(p->timer.expires, now + max_delay) : | |
1350 | try_to_del_timer_sync(&p->timer) >= 0) | |
24f9cdcb | 1351 | mod_timer(&p->timer, now + max_delay); |
08b202b6 YH |
1352 | } |
1353 | ||
1354 | out: | |
1355 | spin_unlock(&br->multicast_lock); | |
1356 | return err; | |
1357 | } | |
1358 | #endif | |
1359 | ||
90010b36 LL |
1360 | static void |
1361 | br_multicast_leave_group(struct net_bridge *br, | |
1362 | struct net_bridge_port *port, | |
1363 | struct br_ip *group, | |
1364 | struct bridge_mcast_other_query *other_query, | |
6db6f0ea FF |
1365 | struct bridge_mcast_own_query *own_query, |
1366 | const unsigned char *src) | |
eb1d1641 | 1367 | { |
eb1d1641 HX |
1368 | struct net_bridge_mdb_entry *mp; |
1369 | struct net_bridge_port_group *p; | |
1370 | unsigned long now; | |
1371 | unsigned long time; | |
1372 | ||
eb1d1641 HX |
1373 | spin_lock(&br->multicast_lock); |
1374 | if (!netif_running(br->dev) || | |
544586f7 | 1375 | (port && port->state == BR_STATE_DISABLED)) |
eb1d1641 HX |
1376 | goto out; |
1377 | ||
19e3a9c9 | 1378 | mp = br_mdb_ip_get(br, group); |
eb1d1641 HX |
1379 | if (!mp) |
1380 | goto out; | |
1381 | ||
544586f7 SA |
1382 | if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) { |
1383 | struct net_bridge_port_group __rcu **pp; | |
1384 | ||
1385 | for (pp = &mp->ports; | |
1386 | (p = mlock_dereference(*pp, br)) != NULL; | |
1387 | pp = &p->next) { | |
6db6f0ea | 1388 | if (!br_port_group_equal(p, port, src)) |
544586f7 SA |
1389 | continue; |
1390 | ||
1391 | rcu_assign_pointer(*pp, p->next); | |
1392 | hlist_del_init(&p->mglist); | |
1393 | del_timer(&p->timer); | |
4329596c | 1394 | kfree_rcu(p, rcu); |
45ebcce5 ER |
1395 | br_mdb_notify(br->dev, port, group, RTM_DELMDB, |
1396 | p->flags); | |
544586f7 | 1397 | |
ff0fd34e | 1398 | if (!mp->ports && !mp->host_joined && |
544586f7 SA |
1399 | netif_running(br->dev)) |
1400 | mod_timer(&mp->timer, jiffies); | |
1401 | } | |
1402 | goto out; | |
1403 | } | |
1404 | ||
1405 | if (timer_pending(&other_query->timer)) | |
1406 | goto out; | |
1407 | ||
675779ad | 1408 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { |
6b7df111 CW |
1409 | __br_multicast_send_query(br, port, &mp->addr); |
1410 | ||
1411 | time = jiffies + br->multicast_last_member_count * | |
1412 | br->multicast_last_member_interval; | |
cc0fdd80 | 1413 | |
90010b36 | 1414 | mod_timer(&own_query->timer, time); |
6b7df111 CW |
1415 | |
1416 | for (p = mlock_dereference(mp->ports, br); | |
1417 | p != NULL; | |
1418 | p = mlock_dereference(p->next, br)) { | |
6db6f0ea | 1419 | if (!br_port_group_equal(p, port, src)) |
6b7df111 CW |
1420 | continue; |
1421 | ||
1422 | if (!hlist_unhashed(&p->mglist) && | |
1423 | (timer_pending(&p->timer) ? | |
1424 | time_after(p->timer.expires, time) : | |
1425 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1426 | mod_timer(&p->timer, time); | |
1427 | } | |
1428 | ||
1429 | break; | |
1430 | } | |
1431 | } | |
1432 | ||
eb1d1641 HX |
1433 | now = jiffies; |
1434 | time = now + br->multicast_last_member_count * | |
1435 | br->multicast_last_member_interval; | |
1436 | ||
1437 | if (!port) { | |
ff0fd34e | 1438 | if (mp->host_joined && |
eb1d1641 HX |
1439 | (timer_pending(&mp->timer) ? |
1440 | time_after(mp->timer.expires, time) : | |
1441 | try_to_del_timer_sync(&mp->timer) >= 0)) { | |
1442 | mod_timer(&mp->timer, time); | |
eb1d1641 | 1443 | } |
454594f3 LL |
1444 | |
1445 | goto out; | |
1446 | } | |
1447 | ||
1448 | for (p = mlock_dereference(mp->ports, br); | |
1449 | p != NULL; | |
1450 | p = mlock_dereference(p->next, br)) { | |
1451 | if (p->port != port) | |
1452 | continue; | |
1453 | ||
1454 | if (!hlist_unhashed(&p->mglist) && | |
1455 | (timer_pending(&p->timer) ? | |
1456 | time_after(p->timer.expires, time) : | |
1457 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
1458 | mod_timer(&p->timer, time); | |
1459 | } | |
1460 | ||
1461 | break; | |
eb1d1641 | 1462 | } |
eb1d1641 HX |
1463 | out: |
1464 | spin_unlock(&br->multicast_lock); | |
1465 | } | |
1466 | ||
8ef2a9a5 YH |
1467 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
1468 | struct net_bridge_port *port, | |
b0e9a30d | 1469 | __be32 group, |
6db6f0ea FF |
1470 | __u16 vid, |
1471 | const unsigned char *src) | |
8ef2a9a5 YH |
1472 | { |
1473 | struct br_ip br_group; | |
90010b36 | 1474 | struct bridge_mcast_own_query *own_query; |
8ef2a9a5 YH |
1475 | |
1476 | if (ipv4_is_local_multicast(group)) | |
1477 | return; | |
1478 | ||
90010b36 LL |
1479 | own_query = port ? &port->ip4_own_query : &br->ip4_own_query; |
1480 | ||
1515a63f | 1481 | memset(&br_group, 0, sizeof(br_group)); |
8ef2a9a5 YH |
1482 | br_group.u.ip4 = group; |
1483 | br_group.proto = htons(ETH_P_IP); | |
b0e9a30d | 1484 | br_group.vid = vid; |
8ef2a9a5 | 1485 | |
90010b36 | 1486 | br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query, |
6db6f0ea | 1487 | own_query, src); |
8ef2a9a5 YH |
1488 | } |
1489 | ||
dfd56b8b | 1490 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1491 | static void br_ip6_multicast_leave_group(struct net_bridge *br, |
1492 | struct net_bridge_port *port, | |
b0e9a30d | 1493 | const struct in6_addr *group, |
6db6f0ea FF |
1494 | __u16 vid, |
1495 | const unsigned char *src) | |
08b202b6 YH |
1496 | { |
1497 | struct br_ip br_group; | |
90010b36 | 1498 | struct bridge_mcast_own_query *own_query; |
08b202b6 | 1499 | |
3c3769e6 | 1500 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
1501 | return; |
1502 | ||
90010b36 LL |
1503 | own_query = port ? &port->ip6_own_query : &br->ip6_own_query; |
1504 | ||
1515a63f | 1505 | memset(&br_group, 0, sizeof(br_group)); |
4e3fd7a0 | 1506 | br_group.u.ip6 = *group; |
08b202b6 | 1507 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 1508 | br_group.vid = vid; |
08b202b6 | 1509 | |
90010b36 | 1510 | br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query, |
6db6f0ea | 1511 | own_query, src); |
08b202b6 YH |
1512 | } |
1513 | #endif | |
8ef2a9a5 | 1514 | |
1080ab95 NA |
1515 | static void br_multicast_err_count(const struct net_bridge *br, |
1516 | const struct net_bridge_port *p, | |
1517 | __be16 proto) | |
1518 | { | |
1519 | struct bridge_mcast_stats __percpu *stats; | |
1520 | struct bridge_mcast_stats *pstats; | |
1521 | ||
675779ad | 1522 | if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) |
1080ab95 NA |
1523 | return; |
1524 | ||
1525 | if (p) | |
1526 | stats = p->mcast_stats; | |
1527 | else | |
1528 | stats = br->mcast_stats; | |
1529 | if (WARN_ON(!stats)) | |
1530 | return; | |
1531 | ||
1532 | pstats = this_cpu_ptr(stats); | |
1533 | ||
1534 | u64_stats_update_begin(&pstats->syncp); | |
1535 | switch (proto) { | |
1536 | case htons(ETH_P_IP): | |
1537 | pstats->mstats.igmp_parse_errors++; | |
1538 | break; | |
1539 | #if IS_ENABLED(CONFIG_IPV6) | |
1540 | case htons(ETH_P_IPV6): | |
1541 | pstats->mstats.mld_parse_errors++; | |
1542 | break; | |
1543 | #endif | |
1544 | } | |
1545 | u64_stats_update_end(&pstats->syncp); | |
1546 | } | |
1547 | ||
91b02d3d NA |
1548 | static void br_multicast_pim(struct net_bridge *br, |
1549 | struct net_bridge_port *port, | |
1550 | const struct sk_buff *skb) | |
1551 | { | |
1552 | unsigned int offset = skb_transport_offset(skb); | |
1553 | struct pimhdr *pimhdr, _pimhdr; | |
1554 | ||
1555 | pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr); | |
1556 | if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION || | |
1557 | pim_hdr_type(pimhdr) != PIM_TYPE_HELLO) | |
1558 | return; | |
1559 | ||
1560 | br_multicast_mark_router(br, port); | |
1561 | } | |
1562 | ||
4b3087c7 LL |
1563 | static int br_ip4_multicast_mrd_rcv(struct net_bridge *br, |
1564 | struct net_bridge_port *port, | |
1565 | struct sk_buff *skb) | |
1566 | { | |
1567 | if (ip_hdr(skb)->protocol != IPPROTO_IGMP || | |
1568 | igmp_hdr(skb)->type != IGMP_MRDISC_ADV) | |
1569 | return -ENOMSG; | |
1570 | ||
1571 | br_multicast_mark_router(br, port); | |
1572 | ||
1573 | return 0; | |
1574 | } | |
1575 | ||
eb1d1641 HX |
1576 | static int br_multicast_ipv4_rcv(struct net_bridge *br, |
1577 | struct net_bridge_port *port, | |
06499098 VY |
1578 | struct sk_buff *skb, |
1579 | u16 vid) | |
eb1d1641 | 1580 | { |
6db6f0ea | 1581 | const unsigned char *src; |
eb1d1641 | 1582 | struct igmphdr *ih; |
eb1d1641 HX |
1583 | int err; |
1584 | ||
ba5ea614 | 1585 | err = ip_mc_check_igmp(skb); |
eb1d1641 | 1586 | |
9afd85c9 | 1587 | if (err == -ENOMSG) { |
91b02d3d | 1588 | if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) { |
bd4265fe | 1589 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
91b02d3d NA |
1590 | } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) { |
1591 | if (ip_hdr(skb)->protocol == IPPROTO_PIM) | |
1592 | br_multicast_pim(br, port, skb); | |
4b3087c7 | 1593 | } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) { |
08e71623 | 1594 | br_ip4_multicast_mrd_rcv(br, port, skb); |
91b02d3d | 1595 | } |
4b3087c7 | 1596 | |
eb1d1641 | 1597 | return 0; |
9afd85c9 | 1598 | } else if (err < 0) { |
1080ab95 | 1599 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1600 | return err; |
bd4265fe | 1601 | } |
eb1d1641 | 1602 | |
9afd85c9 | 1603 | ih = igmp_hdr(skb); |
6db6f0ea | 1604 | src = eth_hdr(skb)->h_source; |
1080ab95 | 1605 | BR_INPUT_SKB_CB(skb)->igmp = ih->type; |
eb1d1641 HX |
1606 | |
1607 | switch (ih->type) { | |
1608 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
1609 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
62b2bcb4 | 1610 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
6db6f0ea | 1611 | err = br_ip4_multicast_add_group(br, port, ih->group, vid, src); |
eb1d1641 HX |
1612 | break; |
1613 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
ba5ea614 | 1614 | err = br_ip4_multicast_igmp3_report(br, port, skb, vid); |
eb1d1641 HX |
1615 | break; |
1616 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
ba5ea614 | 1617 | br_ip4_multicast_query(br, port, skb, vid); |
eb1d1641 HX |
1618 | break; |
1619 | case IGMP_HOST_LEAVE_MESSAGE: | |
6db6f0ea | 1620 | br_ip4_multicast_leave_group(br, port, ih->group, vid, src); |
eb1d1641 HX |
1621 | break; |
1622 | } | |
1623 | ||
a65056ec | 1624 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1625 | BR_MCAST_DIR_RX); |
1626 | ||
eb1d1641 HX |
1627 | return err; |
1628 | } | |
1629 | ||
dfd56b8b | 1630 | #if IS_ENABLED(CONFIG_IPV6) |
4b3087c7 LL |
1631 | static int br_ip6_multicast_mrd_rcv(struct net_bridge *br, |
1632 | struct net_bridge_port *port, | |
1633 | struct sk_buff *skb) | |
1634 | { | |
1635 | int ret; | |
1636 | ||
1637 | if (ipv6_hdr(skb)->nexthdr != IPPROTO_ICMPV6) | |
1638 | return -ENOMSG; | |
1639 | ||
1640 | ret = ipv6_mc_check_icmpv6(skb); | |
1641 | if (ret < 0) | |
1642 | return ret; | |
1643 | ||
1644 | if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV) | |
1645 | return -ENOMSG; | |
1646 | ||
1647 | br_multicast_mark_router(br, port); | |
1648 | ||
1649 | return 0; | |
1650 | } | |
1651 | ||
08b202b6 YH |
1652 | static int br_multicast_ipv6_rcv(struct net_bridge *br, |
1653 | struct net_bridge_port *port, | |
06499098 VY |
1654 | struct sk_buff *skb, |
1655 | u16 vid) | |
08b202b6 | 1656 | { |
6db6f0ea | 1657 | const unsigned char *src; |
9afd85c9 | 1658 | struct mld_msg *mld; |
08b202b6 YH |
1659 | int err; |
1660 | ||
ba5ea614 | 1661 | err = ipv6_mc_check_mld(skb); |
08b202b6 | 1662 | |
9afd85c9 LL |
1663 | if (err == -ENOMSG) { |
1664 | if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr)) | |
1665 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
4b3087c7 LL |
1666 | |
1667 | if (ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr)) { | |
1668 | err = br_ip6_multicast_mrd_rcv(br, port, skb); | |
1669 | ||
1670 | if (err < 0 && err != -ENOMSG) { | |
1671 | br_multicast_err_count(br, port, skb->protocol); | |
1672 | return err; | |
1673 | } | |
1674 | } | |
1675 | ||
08b202b6 | 1676 | return 0; |
9afd85c9 | 1677 | } else if (err < 0) { |
1080ab95 | 1678 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 1679 | return err; |
08b202b6 YH |
1680 | } |
1681 | ||
9afd85c9 | 1682 | mld = (struct mld_msg *)skb_transport_header(skb); |
1080ab95 | 1683 | BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type; |
08b202b6 | 1684 | |
9afd85c9 | 1685 | switch (mld->mld_type) { |
08b202b6 | 1686 | case ICMPV6_MGM_REPORT: |
6db6f0ea | 1687 | src = eth_hdr(skb)->h_source; |
fc2af6c7 | 1688 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
6db6f0ea FF |
1689 | err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid, |
1690 | src); | |
08b202b6 | 1691 | break; |
08b202b6 | 1692 | case ICMPV6_MLD2_REPORT: |
ba5ea614 | 1693 | err = br_ip6_multicast_mld2_report(br, port, skb, vid); |
08b202b6 YH |
1694 | break; |
1695 | case ICMPV6_MGM_QUERY: | |
ba5ea614 | 1696 | err = br_ip6_multicast_query(br, port, skb, vid); |
08b202b6 YH |
1697 | break; |
1698 | case ICMPV6_MGM_REDUCTION: | |
6db6f0ea FF |
1699 | src = eth_hdr(skb)->h_source; |
1700 | br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src); | |
9afd85c9 | 1701 | break; |
08b202b6 YH |
1702 | } |
1703 | ||
a65056ec | 1704 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
1705 | BR_MCAST_DIR_RX); |
1706 | ||
08b202b6 YH |
1707 | return err; |
1708 | } | |
1709 | #endif | |
1710 | ||
eb1d1641 | 1711 | int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, |
06499098 | 1712 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 1713 | { |
1080ab95 NA |
1714 | int ret = 0; |
1715 | ||
1fafc7a9 YH |
1716 | BR_INPUT_SKB_CB(skb)->igmp = 0; |
1717 | BR_INPUT_SKB_CB(skb)->mrouters_only = 0; | |
1718 | ||
13cefad2 | 1719 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
1720 | return 0; |
1721 | ||
1722 | switch (skb->protocol) { | |
1723 | case htons(ETH_P_IP): | |
1080ab95 NA |
1724 | ret = br_multicast_ipv4_rcv(br, port, skb, vid); |
1725 | break; | |
dfd56b8b | 1726 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 1727 | case htons(ETH_P_IPV6): |
1080ab95 NA |
1728 | ret = br_multicast_ipv6_rcv(br, port, skb, vid); |
1729 | break; | |
08b202b6 | 1730 | #endif |
eb1d1641 HX |
1731 | } |
1732 | ||
1080ab95 | 1733 | return ret; |
eb1d1641 HX |
1734 | } |
1735 | ||
cc0fdd80 | 1736 | static void br_multicast_query_expired(struct net_bridge *br, |
2cd41431 LL |
1737 | struct bridge_mcast_own_query *query, |
1738 | struct bridge_mcast_querier *querier) | |
cc0fdd80 LL |
1739 | { |
1740 | spin_lock(&br->multicast_lock); | |
1741 | if (query->startup_sent < br->multicast_startup_query_count) | |
1742 | query->startup_sent++; | |
1743 | ||
71d9f614 | 1744 | RCU_INIT_POINTER(querier->port, NULL); |
cc0fdd80 LL |
1745 | br_multicast_send_query(br, NULL, query); |
1746 | spin_unlock(&br->multicast_lock); | |
1747 | } | |
1748 | ||
88c1f37f | 1749 | static void br_ip4_multicast_query_expired(struct timer_list *t) |
eb1d1641 | 1750 | { |
88c1f37f | 1751 | struct net_bridge *br = from_timer(br, t, ip4_own_query.timer); |
eb1d1641 | 1752 | |
2cd41431 | 1753 | br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier); |
cc0fdd80 | 1754 | } |
eb1d1641 | 1755 | |
cc0fdd80 | 1756 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f | 1757 | static void br_ip6_multicast_query_expired(struct timer_list *t) |
cc0fdd80 | 1758 | { |
88c1f37f | 1759 | struct net_bridge *br = from_timer(br, t, ip6_own_query.timer); |
eb1d1641 | 1760 | |
2cd41431 | 1761 | br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier); |
eb1d1641 | 1762 | } |
cc0fdd80 | 1763 | #endif |
eb1d1641 HX |
1764 | |
1765 | void br_multicast_init(struct net_bridge *br) | |
1766 | { | |
d08c6bc0 | 1767 | br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX; |
eb1d1641 | 1768 | |
7f0aec7a | 1769 | br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
eb1d1641 HX |
1770 | br->multicast_last_member_count = 2; |
1771 | br->multicast_startup_query_count = 2; | |
1772 | ||
1773 | br->multicast_last_member_interval = HZ; | |
1774 | br->multicast_query_response_interval = 10 * HZ; | |
1775 | br->multicast_startup_query_interval = 125 * HZ / 4; | |
1776 | br->multicast_query_interval = 125 * HZ; | |
1777 | br->multicast_querier_interval = 255 * HZ; | |
1778 | br->multicast_membership_interval = 260 * HZ; | |
1779 | ||
90010b36 | 1780 | br->ip4_other_query.delay_time = 0; |
2cd41431 | 1781 | br->ip4_querier.port = NULL; |
aa2ae3e7 | 1782 | br->multicast_igmp_version = 2; |
cc0fdd80 | 1783 | #if IS_ENABLED(CONFIG_IPV6) |
aa2ae3e7 | 1784 | br->multicast_mld_version = 1; |
90010b36 | 1785 | br->ip6_other_query.delay_time = 0; |
2cd41431 | 1786 | br->ip6_querier.port = NULL; |
cc0fdd80 | 1787 | #endif |
6919622a | 1788 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true); |
675779ad | 1789 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); |
b00589af | 1790 | |
eb1d1641 | 1791 | spin_lock_init(&br->multicast_lock); |
88c1f37f AP |
1792 | timer_setup(&br->multicast_router_timer, |
1793 | br_multicast_local_router_expired, 0); | |
1794 | timer_setup(&br->ip4_other_query.timer, | |
1795 | br_ip4_multicast_querier_expired, 0); | |
1796 | timer_setup(&br->ip4_own_query.timer, | |
1797 | br_ip4_multicast_query_expired, 0); | |
cc0fdd80 | 1798 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f AP |
1799 | timer_setup(&br->ip6_other_query.timer, |
1800 | br_ip6_multicast_querier_expired, 0); | |
1801 | timer_setup(&br->ip6_own_query.timer, | |
1802 | br_ip6_multicast_query_expired, 0); | |
cc0fdd80 | 1803 | #endif |
19e3a9c9 | 1804 | INIT_HLIST_HEAD(&br->mdb_list); |
eb1d1641 HX |
1805 | } |
1806 | ||
4effd28c LL |
1807 | static void br_ip4_multicast_join_snoopers(struct net_bridge *br) |
1808 | { | |
1809 | struct in_device *in_dev = in_dev_get(br->dev); | |
1810 | ||
1811 | if (!in_dev) | |
1812 | return; | |
1813 | ||
9fb20801 | 1814 | __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC); |
4effd28c LL |
1815 | in_dev_put(in_dev); |
1816 | } | |
1817 | ||
1818 | #if IS_ENABLED(CONFIG_IPV6) | |
1819 | static void br_ip6_multicast_join_snoopers(struct net_bridge *br) | |
1820 | { | |
1821 | struct in6_addr addr; | |
1822 | ||
1823 | ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a)); | |
1824 | ipv6_dev_mc_inc(br->dev, &addr); | |
1825 | } | |
1826 | #else | |
1827 | static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br) | |
1828 | { | |
1829 | } | |
1830 | #endif | |
1831 | ||
1832 | static void br_multicast_join_snoopers(struct net_bridge *br) | |
1833 | { | |
1834 | br_ip4_multicast_join_snoopers(br); | |
1835 | br_ip6_multicast_join_snoopers(br); | |
1836 | } | |
1837 | ||
1838 | static void br_ip4_multicast_leave_snoopers(struct net_bridge *br) | |
1839 | { | |
1840 | struct in_device *in_dev = in_dev_get(br->dev); | |
1841 | ||
1842 | if (WARN_ON(!in_dev)) | |
1843 | return; | |
1844 | ||
9fb20801 | 1845 | __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC); |
4effd28c LL |
1846 | in_dev_put(in_dev); |
1847 | } | |
1848 | ||
1849 | #if IS_ENABLED(CONFIG_IPV6) | |
1850 | static void br_ip6_multicast_leave_snoopers(struct net_bridge *br) | |
1851 | { | |
1852 | struct in6_addr addr; | |
1853 | ||
1854 | ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a)); | |
1855 | ipv6_dev_mc_dec(br->dev, &addr); | |
1856 | } | |
1857 | #else | |
1858 | static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br) | |
1859 | { | |
1860 | } | |
1861 | #endif | |
1862 | ||
1863 | static void br_multicast_leave_snoopers(struct net_bridge *br) | |
1864 | { | |
1865 | br_ip4_multicast_leave_snoopers(br); | |
1866 | br_ip6_multicast_leave_snoopers(br); | |
1867 | } | |
1868 | ||
cc0fdd80 | 1869 | static void __br_multicast_open(struct net_bridge *br, |
90010b36 | 1870 | struct bridge_mcast_own_query *query) |
eb1d1641 | 1871 | { |
cc0fdd80 | 1872 | query->startup_sent = 0; |
eb1d1641 | 1873 | |
13cefad2 | 1874 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
1875 | return; |
1876 | ||
cc0fdd80 LL |
1877 | mod_timer(&query->timer, jiffies); |
1878 | } | |
1879 | ||
1880 | void br_multicast_open(struct net_bridge *br) | |
1881 | { | |
4effd28c LL |
1882 | if (br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
1883 | br_multicast_join_snoopers(br); | |
1884 | ||
90010b36 | 1885 | __br_multicast_open(br, &br->ip4_own_query); |
cc0fdd80 | 1886 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1887 | __br_multicast_open(br, &br->ip6_own_query); |
cc0fdd80 | 1888 | #endif |
eb1d1641 HX |
1889 | } |
1890 | ||
1891 | void br_multicast_stop(struct net_bridge *br) | |
1892 | { | |
eb1d1641 | 1893 | del_timer_sync(&br->multicast_router_timer); |
90010b36 LL |
1894 | del_timer_sync(&br->ip4_other_query.timer); |
1895 | del_timer_sync(&br->ip4_own_query.timer); | |
cc0fdd80 | 1896 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 LL |
1897 | del_timer_sync(&br->ip6_other_query.timer); |
1898 | del_timer_sync(&br->ip6_own_query.timer); | |
cc0fdd80 | 1899 | #endif |
4effd28c LL |
1900 | |
1901 | if (br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
1902 | br_multicast_leave_snoopers(br); | |
e10177ab SA |
1903 | } |
1904 | ||
1905 | void br_multicast_dev_del(struct net_bridge *br) | |
1906 | { | |
e10177ab | 1907 | struct net_bridge_mdb_entry *mp; |
19e3a9c9 | 1908 | struct hlist_node *tmp; |
eb1d1641 HX |
1909 | |
1910 | spin_lock_bh(&br->multicast_lock); | |
19e3a9c9 NA |
1911 | hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node) { |
1912 | del_timer(&mp->timer); | |
1913 | rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode, | |
1914 | br_mdb_rht_params); | |
1915 | hlist_del_rcu(&mp->mdb_node); | |
4329596c | 1916 | kfree_rcu(mp, rcu); |
eb1d1641 | 1917 | } |
eb1d1641 | 1918 | spin_unlock_bh(&br->multicast_lock); |
19e3a9c9 | 1919 | |
4329596c | 1920 | rcu_barrier(); |
eb1d1641 | 1921 | } |
0909e117 HX |
1922 | |
1923 | int br_multicast_set_router(struct net_bridge *br, unsigned long val) | |
1924 | { | |
6ae4ae8e | 1925 | int err = -EINVAL; |
0909e117 HX |
1926 | |
1927 | spin_lock_bh(&br->multicast_lock); | |
0909e117 HX |
1928 | |
1929 | switch (val) { | |
7f0aec7a NA |
1930 | case MDB_RTR_TYPE_DISABLED: |
1931 | case MDB_RTR_TYPE_PERM: | |
77041420 | 1932 | br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM); |
0909e117 | 1933 | del_timer(&br->multicast_router_timer); |
77041420 YG |
1934 | br->multicast_router = val; |
1935 | err = 0; | |
1936 | break; | |
7f0aec7a | 1937 | case MDB_RTR_TYPE_TEMP_QUERY: |
77041420 YG |
1938 | if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY) |
1939 | br_mc_router_state_change(br, false); | |
0909e117 HX |
1940 | br->multicast_router = val; |
1941 | err = 0; | |
1942 | break; | |
0909e117 HX |
1943 | } |
1944 | ||
0909e117 HX |
1945 | spin_unlock_bh(&br->multicast_lock); |
1946 | ||
1947 | return err; | |
1948 | } | |
1949 | ||
7f0aec7a NA |
1950 | static void __del_port_router(struct net_bridge_port *p) |
1951 | { | |
1952 | if (hlist_unhashed(&p->rlist)) | |
1953 | return; | |
1954 | hlist_del_init_rcu(&p->rlist); | |
1955 | br_rtr_notify(p->br->dev, p, RTM_DELMDB); | |
6d549648 | 1956 | br_port_mc_router_state_change(p, false); |
f12e7d95 NF |
1957 | |
1958 | /* don't allow timer refresh */ | |
1959 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
1960 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
7f0aec7a NA |
1961 | } |
1962 | ||
0909e117 HX |
1963 | int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val) |
1964 | { | |
1965 | struct net_bridge *br = p->br; | |
a55d8246 | 1966 | unsigned long now = jiffies; |
6ae4ae8e | 1967 | int err = -EINVAL; |
0909e117 HX |
1968 | |
1969 | spin_lock(&br->multicast_lock); | |
4950cfd1 | 1970 | if (p->multicast_router == val) { |
a55d8246 NA |
1971 | /* Refresh the temp router port timer */ |
1972 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
1973 | mod_timer(&p->multicast_router_timer, | |
1974 | now + br->multicast_querier_interval); | |
4950cfd1 NA |
1975 | err = 0; |
1976 | goto unlock; | |
1977 | } | |
0909e117 | 1978 | switch (val) { |
7f0aec7a NA |
1979 | case MDB_RTR_TYPE_DISABLED: |
1980 | p->multicast_router = MDB_RTR_TYPE_DISABLED; | |
1981 | __del_port_router(p); | |
1982 | del_timer(&p->multicast_router_timer); | |
1983 | break; | |
1984 | case MDB_RTR_TYPE_TEMP_QUERY: | |
1985 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
1986 | __del_port_router(p); | |
1987 | break; | |
1988 | case MDB_RTR_TYPE_PERM: | |
1989 | p->multicast_router = MDB_RTR_TYPE_PERM; | |
0909e117 | 1990 | del_timer(&p->multicast_router_timer); |
0909e117 HX |
1991 | br_multicast_add_router(br, p); |
1992 | break; | |
a55d8246 NA |
1993 | case MDB_RTR_TYPE_TEMP: |
1994 | p->multicast_router = MDB_RTR_TYPE_TEMP; | |
1995 | br_multicast_mark_router(br, p); | |
1996 | break; | |
7f0aec7a NA |
1997 | default: |
1998 | goto unlock; | |
0909e117 | 1999 | } |
7f0aec7a NA |
2000 | err = 0; |
2001 | unlock: | |
0909e117 HX |
2002 | spin_unlock(&br->multicast_lock); |
2003 | ||
2004 | return err; | |
2005 | } | |
561f1103 | 2006 | |
cc0fdd80 | 2007 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 2008 | struct bridge_mcast_own_query *query) |
561f1103 HX |
2009 | { |
2010 | struct net_bridge_port *port; | |
74857216 | 2011 | |
cc0fdd80 | 2012 | __br_multicast_open(br, query); |
74857216 | 2013 | |
c5b493ce NA |
2014 | rcu_read_lock(); |
2015 | list_for_each_entry_rcu(port, &br->port_list, list) { | |
74857216 HX |
2016 | if (port->state == BR_STATE_DISABLED || |
2017 | port->state == BR_STATE_BLOCKING) | |
2018 | continue; | |
2019 | ||
90010b36 LL |
2020 | if (query == &br->ip4_own_query) |
2021 | br_multicast_enable(&port->ip4_own_query); | |
cc0fdd80 LL |
2022 | #if IS_ENABLED(CONFIG_IPV6) |
2023 | else | |
90010b36 | 2024 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 2025 | #endif |
74857216 | 2026 | } |
c5b493ce | 2027 | rcu_read_unlock(); |
74857216 HX |
2028 | } |
2029 | ||
2030 | int br_multicast_toggle(struct net_bridge *br, unsigned long val) | |
2031 | { | |
7cb3f921 | 2032 | struct net_bridge_port *port; |
561f1103 | 2033 | |
ef5e0d82 | 2034 | spin_lock_bh(&br->multicast_lock); |
13cefad2 | 2035 | if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val) |
561f1103 HX |
2036 | goto unlock; |
2037 | ||
13cefad2 NA |
2038 | br_mc_disabled_update(br->dev, val); |
2039 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val); | |
4effd28c LL |
2040 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) { |
2041 | br_multicast_leave_snoopers(br); | |
561f1103 | 2042 | goto unlock; |
4effd28c | 2043 | } |
561f1103 | 2044 | |
3a7fda06 HX |
2045 | if (!netif_running(br->dev)) |
2046 | goto unlock; | |
2047 | ||
7cb3f921 NA |
2048 | br_multicast_open(br); |
2049 | list_for_each_entry(port, &br->port_list, list) | |
2050 | __br_multicast_enable_port(port); | |
561f1103 HX |
2051 | |
2052 | unlock: | |
ef5e0d82 | 2053 | spin_unlock_bh(&br->multicast_lock); |
561f1103 | 2054 | |
a26d94bf | 2055 | return 0; |
561f1103 | 2056 | } |
b195167f | 2057 | |
9341b988 IS |
2058 | bool br_multicast_enabled(const struct net_device *dev) |
2059 | { | |
2060 | struct net_bridge *br = netdev_priv(dev); | |
2061 | ||
13cefad2 | 2062 | return !!br_opt_get(br, BROPT_MULTICAST_ENABLED); |
9341b988 IS |
2063 | } |
2064 | EXPORT_SYMBOL_GPL(br_multicast_enabled); | |
2065 | ||
0912bda4 YG |
2066 | bool br_multicast_router(const struct net_device *dev) |
2067 | { | |
2068 | struct net_bridge *br = netdev_priv(dev); | |
2069 | bool is_router; | |
2070 | ||
2071 | spin_lock_bh(&br->multicast_lock); | |
2072 | is_router = br_multicast_is_router(br); | |
2073 | spin_unlock_bh(&br->multicast_lock); | |
2074 | return is_router; | |
2075 | } | |
2076 | EXPORT_SYMBOL_GPL(br_multicast_router); | |
2077 | ||
c5c23260 HX |
2078 | int br_multicast_set_querier(struct net_bridge *br, unsigned long val) |
2079 | { | |
b00589af LL |
2080 | unsigned long max_delay; |
2081 | ||
c5c23260 HX |
2082 | val = !!val; |
2083 | ||
2084 | spin_lock_bh(&br->multicast_lock); | |
675779ad | 2085 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val) |
c5c23260 HX |
2086 | goto unlock; |
2087 | ||
675779ad | 2088 | br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val); |
b00589af LL |
2089 | if (!val) |
2090 | goto unlock; | |
2091 | ||
2092 | max_delay = br->multicast_query_response_interval; | |
b00589af | 2093 | |
90010b36 LL |
2094 | if (!timer_pending(&br->ip4_other_query.timer)) |
2095 | br->ip4_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2096 | |
90010b36 | 2097 | br_multicast_start_querier(br, &br->ip4_own_query); |
cc0fdd80 LL |
2098 | |
2099 | #if IS_ENABLED(CONFIG_IPV6) | |
90010b36 LL |
2100 | if (!timer_pending(&br->ip6_other_query.timer)) |
2101 | br->ip6_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 2102 | |
90010b36 | 2103 | br_multicast_start_querier(br, &br->ip6_own_query); |
cc0fdd80 | 2104 | #endif |
c5c23260 HX |
2105 | |
2106 | unlock: | |
2107 | spin_unlock_bh(&br->multicast_lock); | |
2108 | ||
2109 | return 0; | |
2110 | } | |
2111 | ||
5e923585 NA |
2112 | int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val) |
2113 | { | |
2114 | /* Currently we support only version 2 and 3 */ | |
2115 | switch (val) { | |
2116 | case 2: | |
2117 | case 3: | |
2118 | break; | |
2119 | default: | |
2120 | return -EINVAL; | |
2121 | } | |
2122 | ||
2123 | spin_lock_bh(&br->multicast_lock); | |
2124 | br->multicast_igmp_version = val; | |
2125 | spin_unlock_bh(&br->multicast_lock); | |
2126 | ||
2127 | return 0; | |
2128 | } | |
2129 | ||
aa2ae3e7 NA |
2130 | #if IS_ENABLED(CONFIG_IPV6) |
2131 | int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val) | |
2132 | { | |
2133 | /* Currently we support version 1 and 2 */ | |
2134 | switch (val) { | |
2135 | case 1: | |
2136 | case 2: | |
2137 | break; | |
2138 | default: | |
2139 | return -EINVAL; | |
2140 | } | |
2141 | ||
2142 | spin_lock_bh(&br->multicast_lock); | |
2143 | br->multicast_mld_version = val; | |
2144 | spin_unlock_bh(&br->multicast_lock); | |
2145 | ||
2146 | return 0; | |
2147 | } | |
2148 | #endif | |
2149 | ||
07f8ac4a LL |
2150 | /** |
2151 | * br_multicast_list_adjacent - Returns snooped multicast addresses | |
2152 | * @dev: The bridge port adjacent to which to retrieve addresses | |
2153 | * @br_ip_list: The list to store found, snooped multicast IP addresses in | |
2154 | * | |
2155 | * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast | |
2156 | * snooping feature on all bridge ports of dev's bridge device, excluding | |
2157 | * the addresses from dev itself. | |
2158 | * | |
2159 | * Returns the number of items added to br_ip_list. | |
2160 | * | |
2161 | * Notes: | |
2162 | * - br_ip_list needs to be initialized by caller | |
2163 | * - br_ip_list might contain duplicates in the end | |
2164 | * (needs to be taken care of by caller) | |
2165 | * - br_ip_list needs to be freed by caller | |
2166 | */ | |
2167 | int br_multicast_list_adjacent(struct net_device *dev, | |
2168 | struct list_head *br_ip_list) | |
2169 | { | |
2170 | struct net_bridge *br; | |
2171 | struct net_bridge_port *port; | |
2172 | struct net_bridge_port_group *group; | |
2173 | struct br_ip_list *entry; | |
2174 | int count = 0; | |
2175 | ||
2176 | rcu_read_lock(); | |
35f861e3 | 2177 | if (!br_ip_list || !netif_is_bridge_port(dev)) |
07f8ac4a LL |
2178 | goto unlock; |
2179 | ||
2180 | port = br_port_get_rcu(dev); | |
2181 | if (!port || !port->br) | |
2182 | goto unlock; | |
2183 | ||
2184 | br = port->br; | |
2185 | ||
2186 | list_for_each_entry_rcu(port, &br->port_list, list) { | |
2187 | if (!port->dev || port->dev == dev) | |
2188 | continue; | |
2189 | ||
2190 | hlist_for_each_entry_rcu(group, &port->mglist, mglist) { | |
2191 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); | |
2192 | if (!entry) | |
2193 | goto unlock; | |
2194 | ||
2195 | entry->addr = group->addr; | |
2196 | list_add(&entry->list, br_ip_list); | |
2197 | count++; | |
2198 | } | |
2199 | } | |
2200 | ||
2201 | unlock: | |
2202 | rcu_read_unlock(); | |
2203 | return count; | |
2204 | } | |
2205 | EXPORT_SYMBOL_GPL(br_multicast_list_adjacent); | |
2cd41431 | 2206 | |
c34963e2 LL |
2207 | /** |
2208 | * br_multicast_has_querier_anywhere - Checks for a querier on a bridge | |
2209 | * @dev: The bridge port providing the bridge on which to check for a querier | |
2210 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2211 | * | |
2212 | * Checks whether the given interface has a bridge on top and if so returns | |
2213 | * true if a valid querier exists anywhere on the bridged link layer. | |
2214 | * Otherwise returns false. | |
2215 | */ | |
2216 | bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto) | |
2217 | { | |
2218 | struct net_bridge *br; | |
2219 | struct net_bridge_port *port; | |
2220 | struct ethhdr eth; | |
2221 | bool ret = false; | |
2222 | ||
2223 | rcu_read_lock(); | |
35f861e3 | 2224 | if (!netif_is_bridge_port(dev)) |
c34963e2 LL |
2225 | goto unlock; |
2226 | ||
2227 | port = br_port_get_rcu(dev); | |
2228 | if (!port || !port->br) | |
2229 | goto unlock; | |
2230 | ||
2231 | br = port->br; | |
2232 | ||
2233 | memset(ð, 0, sizeof(eth)); | |
2234 | eth.h_proto = htons(proto); | |
2235 | ||
2236 | ret = br_multicast_querier_exists(br, ð); | |
2237 | ||
2238 | unlock: | |
2239 | rcu_read_unlock(); | |
2240 | return ret; | |
2241 | } | |
2242 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere); | |
2243 | ||
2cd41431 LL |
2244 | /** |
2245 | * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port | |
2246 | * @dev: The bridge port adjacent to which to check for a querier | |
2247 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
2248 | * | |
2249 | * Checks whether the given interface has a bridge on top and if so returns | |
2250 | * true if a selected querier is behind one of the other ports of this | |
2251 | * bridge. Otherwise returns false. | |
2252 | */ | |
2253 | bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto) | |
2254 | { | |
2255 | struct net_bridge *br; | |
2256 | struct net_bridge_port *port; | |
2257 | bool ret = false; | |
2258 | ||
2259 | rcu_read_lock(); | |
35f861e3 | 2260 | if (!netif_is_bridge_port(dev)) |
2cd41431 LL |
2261 | goto unlock; |
2262 | ||
2263 | port = br_port_get_rcu(dev); | |
2264 | if (!port || !port->br) | |
2265 | goto unlock; | |
2266 | ||
2267 | br = port->br; | |
2268 | ||
2269 | switch (proto) { | |
2270 | case ETH_P_IP: | |
2271 | if (!timer_pending(&br->ip4_other_query.timer) || | |
2272 | rcu_dereference(br->ip4_querier.port) == port) | |
2273 | goto unlock; | |
2274 | break; | |
3993c4e1 | 2275 | #if IS_ENABLED(CONFIG_IPV6) |
2cd41431 LL |
2276 | case ETH_P_IPV6: |
2277 | if (!timer_pending(&br->ip6_other_query.timer) || | |
2278 | rcu_dereference(br->ip6_querier.port) == port) | |
2279 | goto unlock; | |
2280 | break; | |
3993c4e1 | 2281 | #endif |
2cd41431 LL |
2282 | default: |
2283 | goto unlock; | |
2284 | } | |
2285 | ||
2286 | ret = true; | |
2287 | unlock: | |
2288 | rcu_read_unlock(); | |
2289 | return ret; | |
2290 | } | |
2291 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent); | |
1080ab95 NA |
2292 | |
2293 | static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, | |
a65056ec | 2294 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2295 | { |
2296 | struct bridge_mcast_stats *pstats = this_cpu_ptr(stats); | |
a65056ec NA |
2297 | __be16 proto = skb->protocol; |
2298 | unsigned int t_len; | |
1080ab95 NA |
2299 | |
2300 | u64_stats_update_begin(&pstats->syncp); | |
2301 | switch (proto) { | |
2302 | case htons(ETH_P_IP): | |
a65056ec | 2303 | t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb); |
1080ab95 NA |
2304 | switch (type) { |
2305 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
2306 | pstats->mstats.igmp_v1reports[dir]++; | |
2307 | break; | |
2308 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
2309 | pstats->mstats.igmp_v2reports[dir]++; | |
2310 | break; | |
2311 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
2312 | pstats->mstats.igmp_v3reports[dir]++; | |
2313 | break; | |
2314 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
a65056ec NA |
2315 | if (t_len != sizeof(struct igmphdr)) { |
2316 | pstats->mstats.igmp_v3queries[dir]++; | |
2317 | } else { | |
2318 | unsigned int offset = skb_transport_offset(skb); | |
2319 | struct igmphdr *ih, _ihdr; | |
2320 | ||
2321 | ih = skb_header_pointer(skb, offset, | |
2322 | sizeof(_ihdr), &_ihdr); | |
2323 | if (!ih) | |
2324 | break; | |
2325 | if (!ih->code) | |
2326 | pstats->mstats.igmp_v1queries[dir]++; | |
2327 | else | |
2328 | pstats->mstats.igmp_v2queries[dir]++; | |
2329 | } | |
1080ab95 NA |
2330 | break; |
2331 | case IGMP_HOST_LEAVE_MESSAGE: | |
2332 | pstats->mstats.igmp_leaves[dir]++; | |
2333 | break; | |
2334 | } | |
2335 | break; | |
2336 | #if IS_ENABLED(CONFIG_IPV6) | |
2337 | case htons(ETH_P_IPV6): | |
a65056ec NA |
2338 | t_len = ntohs(ipv6_hdr(skb)->payload_len) + |
2339 | sizeof(struct ipv6hdr); | |
2340 | t_len -= skb_network_header_len(skb); | |
1080ab95 NA |
2341 | switch (type) { |
2342 | case ICMPV6_MGM_REPORT: | |
2343 | pstats->mstats.mld_v1reports[dir]++; | |
2344 | break; | |
2345 | case ICMPV6_MLD2_REPORT: | |
2346 | pstats->mstats.mld_v2reports[dir]++; | |
2347 | break; | |
2348 | case ICMPV6_MGM_QUERY: | |
a65056ec NA |
2349 | if (t_len != sizeof(struct mld_msg)) |
2350 | pstats->mstats.mld_v2queries[dir]++; | |
2351 | else | |
2352 | pstats->mstats.mld_v1queries[dir]++; | |
1080ab95 NA |
2353 | break; |
2354 | case ICMPV6_MGM_REDUCTION: | |
2355 | pstats->mstats.mld_leaves[dir]++; | |
2356 | break; | |
2357 | } | |
2358 | break; | |
2359 | #endif /* CONFIG_IPV6 */ | |
2360 | } | |
2361 | u64_stats_update_end(&pstats->syncp); | |
2362 | } | |
2363 | ||
2364 | void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, | |
a65056ec | 2365 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
2366 | { |
2367 | struct bridge_mcast_stats __percpu *stats; | |
2368 | ||
2369 | /* if multicast_disabled is true then igmp type can't be set */ | |
675779ad | 2370 | if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) |
1080ab95 NA |
2371 | return; |
2372 | ||
2373 | if (p) | |
2374 | stats = p->mcast_stats; | |
2375 | else | |
2376 | stats = br->mcast_stats; | |
2377 | if (WARN_ON(!stats)) | |
2378 | return; | |
2379 | ||
a65056ec | 2380 | br_mcast_stats_add(stats, skb, type, dir); |
1080ab95 NA |
2381 | } |
2382 | ||
2383 | int br_multicast_init_stats(struct net_bridge *br) | |
2384 | { | |
2385 | br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); | |
2386 | if (!br->mcast_stats) | |
2387 | return -ENOMEM; | |
2388 | ||
2389 | return 0; | |
2390 | } | |
2391 | ||
b6fe0440 IS |
2392 | void br_multicast_uninit_stats(struct net_bridge *br) |
2393 | { | |
2394 | free_percpu(br->mcast_stats); | |
2395 | } | |
2396 | ||
1080ab95 NA |
2397 | static void mcast_stats_add_dir(u64 *dst, u64 *src) |
2398 | { | |
2399 | dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX]; | |
2400 | dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX]; | |
2401 | } | |
2402 | ||
2403 | void br_multicast_get_stats(const struct net_bridge *br, | |
2404 | const struct net_bridge_port *p, | |
2405 | struct br_mcast_stats *dest) | |
2406 | { | |
2407 | struct bridge_mcast_stats __percpu *stats; | |
2408 | struct br_mcast_stats tdst; | |
2409 | int i; | |
2410 | ||
2411 | memset(dest, 0, sizeof(*dest)); | |
2412 | if (p) | |
2413 | stats = p->mcast_stats; | |
2414 | else | |
2415 | stats = br->mcast_stats; | |
2416 | if (WARN_ON(!stats)) | |
2417 | return; | |
2418 | ||
2419 | memset(&tdst, 0, sizeof(tdst)); | |
2420 | for_each_possible_cpu(i) { | |
2421 | struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i); | |
2422 | struct br_mcast_stats temp; | |
2423 | unsigned int start; | |
2424 | ||
2425 | do { | |
2426 | start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); | |
2427 | memcpy(&temp, &cpu_stats->mstats, sizeof(temp)); | |
2428 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); | |
2429 | ||
a65056ec NA |
2430 | mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries); |
2431 | mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries); | |
2432 | mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries); | |
1080ab95 NA |
2433 | mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves); |
2434 | mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports); | |
2435 | mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports); | |
2436 | mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports); | |
2437 | tdst.igmp_parse_errors += temp.igmp_parse_errors; | |
2438 | ||
a65056ec NA |
2439 | mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries); |
2440 | mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries); | |
1080ab95 NA |
2441 | mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves); |
2442 | mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports); | |
2443 | mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports); | |
2444 | tdst.mld_parse_errors += temp.mld_parse_errors; | |
2445 | } | |
2446 | memcpy(dest, &tdst, sizeof(*dest)); | |
2447 | } | |
19e3a9c9 NA |
2448 | |
2449 | int br_mdb_hash_init(struct net_bridge *br) | |
2450 | { | |
2451 | return rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params); | |
2452 | } | |
2453 | ||
2454 | void br_mdb_hash_fini(struct net_bridge *br) | |
2455 | { | |
2456 | rhashtable_destroy(&br->mdb_hash_tbl); | |
2457 | } |