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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" | |
8f07b831 | 36 | #include "br_private_mcast_eht.h" |
eb1d1641 | 37 | |
19e3a9c9 NA |
38 | static const struct rhashtable_params br_mdb_rht_params = { |
39 | .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode), | |
40 | .key_offset = offsetof(struct net_bridge_mdb_entry, addr), | |
41 | .key_len = sizeof(struct br_ip), | |
42 | .automatic_shrinking = true, | |
19e3a9c9 NA |
43 | }; |
44 | ||
085b53c8 NA |
45 | static const struct rhashtable_params br_sg_port_rht_params = { |
46 | .head_offset = offsetof(struct net_bridge_port_group, rhnode), | |
47 | .key_offset = offsetof(struct net_bridge_port_group, key), | |
48 | .key_len = sizeof(struct net_bridge_port_group_sg_key), | |
49 | .automatic_shrinking = true, | |
50 | }; | |
51 | ||
cc0fdd80 | 52 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 53 | struct bridge_mcast_own_query *query); |
d9b8c4d8 LL |
54 | static void br_ip4_multicast_add_router(struct net_bridge *br, |
55 | struct net_bridge_port *port); | |
bc8c20ac SA |
56 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
57 | struct net_bridge_port *port, | |
58 | __be32 group, | |
6db6f0ea FF |
59 | __u16 vid, |
60 | const unsigned char *src); | |
42c11ccf | 61 | static void br_multicast_port_group_rexmit(struct timer_list *t); |
6db6f0ea | 62 | |
ed2d3597 LL |
63 | static void |
64 | br_multicast_rport_del_notify(struct net_bridge_port *p, bool deleted); | |
a3c02e76 LL |
65 | static void br_ip6_multicast_add_router(struct net_bridge *br, |
66 | struct net_bridge_port *port); | |
30515832 | 67 | #if IS_ENABLED(CONFIG_IPV6) |
bc8c20ac SA |
68 | static void br_ip6_multicast_leave_group(struct net_bridge *br, |
69 | struct net_bridge_port *port, | |
70 | const struct in6_addr *group, | |
6db6f0ea | 71 | __u16 vid, const unsigned char *src); |
bc8c20ac | 72 | #endif |
b0812368 NA |
73 | static struct net_bridge_port_group * |
74 | __br_multicast_add_group(struct net_bridge *br, | |
75 | struct net_bridge_port *port, | |
76 | struct br_ip *group, | |
77 | const unsigned char *src, | |
78 | u8 filter_mode, | |
9116ffbf NA |
79 | bool igmpv2_mldv1, |
80 | bool blocked); | |
8266a049 NA |
81 | static void br_multicast_find_del_pg(struct net_bridge *br, |
82 | struct net_bridge_port_group *pg); | |
c83b8fab | 83 | |
085b53c8 NA |
84 | static struct net_bridge_port_group * |
85 | br_sg_port_find(struct net_bridge *br, | |
86 | struct net_bridge_port_group_sg_key *sg_p) | |
87 | { | |
88 | lockdep_assert_held_once(&br->multicast_lock); | |
89 | ||
90 | return rhashtable_lookup_fast(&br->sg_port_tbl, sg_p, | |
91 | br_sg_port_rht_params); | |
92 | } | |
93 | ||
19e3a9c9 NA |
94 | static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br, |
95 | struct br_ip *dst) | |
08b202b6 | 96 | { |
19e3a9c9 | 97 | return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params); |
08b202b6 | 98 | } |
08b202b6 | 99 | |
19e3a9c9 NA |
100 | struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br, |
101 | struct br_ip *dst) | |
eb1d1641 | 102 | { |
19e3a9c9 | 103 | struct net_bridge_mdb_entry *ent; |
eb1d1641 | 104 | |
19e3a9c9 | 105 | lockdep_assert_held_once(&br->multicast_lock); |
eb1d1641 | 106 | |
19e3a9c9 NA |
107 | rcu_read_lock(); |
108 | ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params); | |
109 | rcu_read_unlock(); | |
7f285fa7 | 110 | |
19e3a9c9 | 111 | return ent; |
7f285fa7 HX |
112 | } |
113 | ||
19e3a9c9 NA |
114 | static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br, |
115 | __be32 dst, __u16 vid) | |
eb1d1641 | 116 | { |
8ef2a9a5 YH |
117 | struct br_ip br_dst; |
118 | ||
19e3a9c9 | 119 | memset(&br_dst, 0, sizeof(br_dst)); |
eab3227b | 120 | br_dst.dst.ip4 = dst; |
8ef2a9a5 | 121 | br_dst.proto = htons(ETH_P_IP); |
b0e9a30d | 122 | br_dst.vid = vid; |
0821ec55 | 123 | |
19e3a9c9 | 124 | return br_mdb_ip_get(br, &br_dst); |
8ef2a9a5 YH |
125 | } |
126 | ||
dfd56b8b | 127 | #if IS_ENABLED(CONFIG_IPV6) |
19e3a9c9 NA |
128 | static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br, |
129 | const struct in6_addr *dst, | |
130 | __u16 vid) | |
08b202b6 YH |
131 | { |
132 | struct br_ip br_dst; | |
0821ec55 | 133 | |
19e3a9c9 | 134 | memset(&br_dst, 0, sizeof(br_dst)); |
eab3227b | 135 | br_dst.dst.ip6 = *dst; |
08b202b6 | 136 | br_dst.proto = htons(ETH_P_IPV6); |
b0e9a30d | 137 | br_dst.vid = vid; |
08b202b6 | 138 | |
19e3a9c9 | 139 | return br_mdb_ip_get(br, &br_dst); |
08b202b6 YH |
140 | } |
141 | #endif | |
142 | ||
eb1d1641 | 143 | struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, |
fbca58a2 | 144 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 145 | { |
8ef2a9a5 YH |
146 | struct br_ip ip; |
147 | ||
13cefad2 | 148 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
149 | return NULL; |
150 | ||
8ef2a9a5 | 151 | if (BR_INPUT_SKB_CB(skb)->igmp) |
eb1d1641 HX |
152 | return NULL; |
153 | ||
19e3a9c9 | 154 | memset(&ip, 0, sizeof(ip)); |
8ef2a9a5 | 155 | ip.proto = skb->protocol; |
fbca58a2 | 156 | ip.vid = vid; |
8ef2a9a5 | 157 | |
eb1d1641 HX |
158 | switch (skb->protocol) { |
159 | case htons(ETH_P_IP): | |
eab3227b | 160 | ip.dst.ip4 = ip_hdr(skb)->daddr; |
7d07a68c NA |
161 | if (br->multicast_igmp_version == 3) { |
162 | struct net_bridge_mdb_entry *mdb; | |
163 | ||
164 | ip.src.ip4 = ip_hdr(skb)->saddr; | |
165 | mdb = br_mdb_ip_get_rcu(br, &ip); | |
166 | if (mdb) | |
167 | return mdb; | |
168 | ip.src.ip4 = 0; | |
169 | } | |
8ef2a9a5 | 170 | break; |
dfd56b8b | 171 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 172 | case htons(ETH_P_IPV6): |
eab3227b | 173 | ip.dst.ip6 = ipv6_hdr(skb)->daddr; |
7d07a68c NA |
174 | if (br->multicast_mld_version == 2) { |
175 | struct net_bridge_mdb_entry *mdb; | |
176 | ||
177 | ip.src.ip6 = ipv6_hdr(skb)->saddr; | |
178 | mdb = br_mdb_ip_get_rcu(br, &ip); | |
179 | if (mdb) | |
180 | return mdb; | |
181 | memset(&ip.src.ip6, 0, sizeof(ip.src.ip6)); | |
182 | } | |
08b202b6 YH |
183 | break; |
184 | #endif | |
8ef2a9a5 | 185 | default: |
955062b0 NA |
186 | ip.proto = 0; |
187 | ether_addr_copy(ip.dst.mac_addr, eth_hdr(skb)->h_dest); | |
eb1d1641 HX |
188 | } |
189 | ||
19e3a9c9 | 190 | return br_mdb_ip_get_rcu(br, &ip); |
eb1d1641 HX |
191 | } |
192 | ||
b0812368 NA |
193 | static bool br_port_group_equal(struct net_bridge_port_group *p, |
194 | struct net_bridge_port *port, | |
195 | const unsigned char *src) | |
196 | { | |
197 | if (p->key.port != port) | |
198 | return false; | |
199 | ||
200 | if (!(port->flags & BR_MULTICAST_TO_UNICAST)) | |
201 | return true; | |
202 | ||
203 | return ether_addr_equal(src, p->eth_addr); | |
204 | } | |
205 | ||
8266a049 NA |
206 | static void __fwd_add_star_excl(struct net_bridge_port_group *pg, |
207 | struct br_ip *sg_ip) | |
208 | { | |
209 | struct net_bridge_port_group_sg_key sg_key; | |
210 | struct net_bridge *br = pg->key.port->br; | |
211 | struct net_bridge_port_group *src_pg; | |
212 | ||
213 | memset(&sg_key, 0, sizeof(sg_key)); | |
214 | sg_key.port = pg->key.port; | |
215 | sg_key.addr = *sg_ip; | |
216 | if (br_sg_port_find(br, &sg_key)) | |
217 | return; | |
218 | ||
219 | src_pg = __br_multicast_add_group(br, pg->key.port, sg_ip, pg->eth_addr, | |
9116ffbf | 220 | MCAST_INCLUDE, false, false); |
8266a049 NA |
221 | if (IS_ERR_OR_NULL(src_pg) || |
222 | src_pg->rt_protocol != RTPROT_KERNEL) | |
223 | return; | |
224 | ||
225 | src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL; | |
226 | } | |
227 | ||
228 | static void __fwd_del_star_excl(struct net_bridge_port_group *pg, | |
229 | struct br_ip *sg_ip) | |
230 | { | |
231 | struct net_bridge_port_group_sg_key sg_key; | |
232 | struct net_bridge *br = pg->key.port->br; | |
233 | struct net_bridge_port_group *src_pg; | |
234 | ||
235 | memset(&sg_key, 0, sizeof(sg_key)); | |
236 | sg_key.port = pg->key.port; | |
237 | sg_key.addr = *sg_ip; | |
238 | src_pg = br_sg_port_find(br, &sg_key); | |
239 | if (!src_pg || !(src_pg->flags & MDB_PG_FLAGS_STAR_EXCL) || | |
240 | src_pg->rt_protocol != RTPROT_KERNEL) | |
241 | return; | |
242 | ||
243 | br_multicast_find_del_pg(br, src_pg); | |
244 | } | |
245 | ||
246 | /* When a port group transitions to (or is added as) EXCLUDE we need to add it | |
247 | * to all other ports' S,G entries which are not blocked by the current group | |
248 | * for proper replication, the assumption is that any S,G blocked entries | |
249 | * are already added so the S,G,port lookup should skip them. | |
250 | * When a port group transitions from EXCLUDE -> INCLUDE mode or is being | |
251 | * deleted we need to remove it from all ports' S,G entries where it was | |
252 | * automatically installed before (i.e. where it's MDB_PG_FLAGS_STAR_EXCL). | |
253 | */ | |
254 | void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, | |
255 | u8 filter_mode) | |
256 | { | |
257 | struct net_bridge *br = pg->key.port->br; | |
258 | struct net_bridge_port_group *pg_lst; | |
259 | struct net_bridge_mdb_entry *mp; | |
260 | struct br_ip sg_ip; | |
261 | ||
262 | if (WARN_ON(!br_multicast_is_star_g(&pg->key.addr))) | |
263 | return; | |
264 | ||
265 | mp = br_mdb_ip_get(br, &pg->key.addr); | |
266 | if (!mp) | |
267 | return; | |
268 | ||
269 | memset(&sg_ip, 0, sizeof(sg_ip)); | |
270 | sg_ip = pg->key.addr; | |
271 | for (pg_lst = mlock_dereference(mp->ports, br); | |
272 | pg_lst; | |
273 | pg_lst = mlock_dereference(pg_lst->next, br)) { | |
274 | struct net_bridge_group_src *src_ent; | |
275 | ||
276 | if (pg_lst == pg) | |
277 | continue; | |
278 | hlist_for_each_entry(src_ent, &pg_lst->src_list, node) { | |
279 | if (!(src_ent->flags & BR_SGRP_F_INSTALLED)) | |
280 | continue; | |
281 | sg_ip.src = src_ent->addr.src; | |
282 | switch (filter_mode) { | |
283 | case MCAST_INCLUDE: | |
284 | __fwd_del_star_excl(pg, &sg_ip); | |
285 | break; | |
286 | case MCAST_EXCLUDE: | |
287 | __fwd_add_star_excl(pg, &sg_ip); | |
288 | break; | |
289 | } | |
290 | } | |
291 | } | |
292 | } | |
293 | ||
094b82fd NA |
294 | /* called when adding a new S,G with host_joined == false by default */ |
295 | static void br_multicast_sg_host_state(struct net_bridge_mdb_entry *star_mp, | |
296 | struct net_bridge_port_group *sg) | |
297 | { | |
298 | struct net_bridge_mdb_entry *sg_mp; | |
299 | ||
300 | if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr))) | |
301 | return; | |
302 | if (!star_mp->host_joined) | |
303 | return; | |
304 | ||
305 | sg_mp = br_mdb_ip_get(star_mp->br, &sg->key.addr); | |
306 | if (!sg_mp) | |
307 | return; | |
308 | sg_mp->host_joined = true; | |
309 | } | |
310 | ||
311 | /* set the host_joined state of all of *,G's S,G entries */ | |
312 | static void br_multicast_star_g_host_state(struct net_bridge_mdb_entry *star_mp) | |
313 | { | |
314 | struct net_bridge *br = star_mp->br; | |
315 | struct net_bridge_mdb_entry *sg_mp; | |
316 | struct net_bridge_port_group *pg; | |
317 | struct br_ip sg_ip; | |
318 | ||
319 | if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr))) | |
320 | return; | |
321 | ||
322 | memset(&sg_ip, 0, sizeof(sg_ip)); | |
323 | sg_ip = star_mp->addr; | |
324 | for (pg = mlock_dereference(star_mp->ports, br); | |
325 | pg; | |
326 | pg = mlock_dereference(pg->next, br)) { | |
327 | struct net_bridge_group_src *src_ent; | |
328 | ||
329 | hlist_for_each_entry(src_ent, &pg->src_list, node) { | |
330 | if (!(src_ent->flags & BR_SGRP_F_INSTALLED)) | |
331 | continue; | |
332 | sg_ip.src = src_ent->addr.src; | |
333 | sg_mp = br_mdb_ip_get(br, &sg_ip); | |
334 | if (!sg_mp) | |
335 | continue; | |
336 | sg_mp->host_joined = star_mp->host_joined; | |
337 | } | |
338 | } | |
339 | } | |
340 | ||
8266a049 NA |
341 | static void br_multicast_sg_del_exclude_ports(struct net_bridge_mdb_entry *sgmp) |
342 | { | |
343 | struct net_bridge_port_group __rcu **pp; | |
344 | struct net_bridge_port_group *p; | |
345 | ||
346 | /* *,G exclude ports are only added to S,G entries */ | |
347 | if (WARN_ON(br_multicast_is_star_g(&sgmp->addr))) | |
348 | return; | |
349 | ||
350 | /* we need the STAR_EXCLUDE ports if there are non-STAR_EXCLUDE ports | |
351 | * we should ignore perm entries since they're managed by user-space | |
352 | */ | |
353 | for (pp = &sgmp->ports; | |
354 | (p = mlock_dereference(*pp, sgmp->br)) != NULL; | |
355 | pp = &p->next) | |
356 | if (!(p->flags & (MDB_PG_FLAGS_STAR_EXCL | | |
357 | MDB_PG_FLAGS_PERMANENT))) | |
358 | return; | |
359 | ||
094b82fd NA |
360 | /* currently the host can only have joined the *,G which means |
361 | * we treat it as EXCLUDE {}, so for an S,G it's considered a | |
362 | * STAR_EXCLUDE entry and we can safely leave it | |
363 | */ | |
364 | sgmp->host_joined = false; | |
365 | ||
8266a049 NA |
366 | for (pp = &sgmp->ports; |
367 | (p = mlock_dereference(*pp, sgmp->br)) != NULL;) { | |
368 | if (!(p->flags & MDB_PG_FLAGS_PERMANENT)) | |
369 | br_multicast_del_pg(sgmp, p, pp); | |
370 | else | |
371 | pp = &p->next; | |
372 | } | |
373 | } | |
374 | ||
375 | void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, | |
376 | struct net_bridge_port_group *sg) | |
377 | { | |
378 | struct net_bridge_port_group_sg_key sg_key; | |
379 | struct net_bridge *br = star_mp->br; | |
380 | struct net_bridge_port_group *pg; | |
381 | ||
382 | if (WARN_ON(br_multicast_is_star_g(&sg->key.addr))) | |
383 | return; | |
384 | if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr))) | |
385 | return; | |
386 | ||
094b82fd | 387 | br_multicast_sg_host_state(star_mp, sg); |
8266a049 NA |
388 | memset(&sg_key, 0, sizeof(sg_key)); |
389 | sg_key.addr = sg->key.addr; | |
390 | /* we need to add all exclude ports to the S,G */ | |
391 | for (pg = mlock_dereference(star_mp->ports, br); | |
392 | pg; | |
393 | pg = mlock_dereference(pg->next, br)) { | |
394 | struct net_bridge_port_group *src_pg; | |
395 | ||
396 | if (pg == sg || pg->filter_mode == MCAST_INCLUDE) | |
397 | continue; | |
398 | ||
399 | sg_key.port = pg->key.port; | |
400 | if (br_sg_port_find(br, &sg_key)) | |
401 | continue; | |
402 | ||
403 | src_pg = __br_multicast_add_group(br, pg->key.port, | |
404 | &sg->key.addr, | |
405 | sg->eth_addr, | |
9116ffbf | 406 | MCAST_INCLUDE, false, false); |
8266a049 NA |
407 | if (IS_ERR_OR_NULL(src_pg) || |
408 | src_pg->rt_protocol != RTPROT_KERNEL) | |
409 | continue; | |
410 | src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL; | |
411 | } | |
412 | } | |
413 | ||
b0812368 NA |
414 | static void br_multicast_fwd_src_add(struct net_bridge_group_src *src) |
415 | { | |
8266a049 | 416 | struct net_bridge_mdb_entry *star_mp; |
b0812368 NA |
417 | struct net_bridge_port_group *sg; |
418 | struct br_ip sg_ip; | |
419 | ||
420 | if (src->flags & BR_SGRP_F_INSTALLED) | |
421 | return; | |
422 | ||
423 | memset(&sg_ip, 0, sizeof(sg_ip)); | |
424 | sg_ip = src->pg->key.addr; | |
425 | sg_ip.src = src->addr.src; | |
426 | sg = __br_multicast_add_group(src->br, src->pg->key.port, &sg_ip, | |
9116ffbf NA |
427 | src->pg->eth_addr, MCAST_INCLUDE, false, |
428 | !timer_pending(&src->timer)); | |
b0812368 NA |
429 | if (IS_ERR_OR_NULL(sg)) |
430 | return; | |
431 | src->flags |= BR_SGRP_F_INSTALLED; | |
8266a049 | 432 | sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL; |
b0812368 NA |
433 | |
434 | /* if it was added by user-space as perm we can skip next steps */ | |
435 | if (sg->rt_protocol != RTPROT_KERNEL && | |
436 | (sg->flags & MDB_PG_FLAGS_PERMANENT)) | |
437 | return; | |
438 | ||
439 | /* the kernel is now responsible for removing this S,G */ | |
440 | del_timer(&sg->timer); | |
8266a049 NA |
441 | star_mp = br_mdb_ip_get(src->br, &src->pg->key.addr); |
442 | if (!star_mp) | |
443 | return; | |
444 | ||
445 | br_multicast_sg_add_exclude_ports(star_mp, sg); | |
b0812368 NA |
446 | } |
447 | ||
d5a10222 NA |
448 | static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src, |
449 | bool fastleave) | |
b0812368 NA |
450 | { |
451 | struct net_bridge_port_group *p, *pg = src->pg; | |
452 | struct net_bridge_port_group __rcu **pp; | |
453 | struct net_bridge_mdb_entry *mp; | |
454 | struct br_ip sg_ip; | |
455 | ||
456 | memset(&sg_ip, 0, sizeof(sg_ip)); | |
457 | sg_ip = pg->key.addr; | |
458 | sg_ip.src = src->addr.src; | |
459 | ||
460 | mp = br_mdb_ip_get(src->br, &sg_ip); | |
461 | if (!mp) | |
462 | return; | |
463 | ||
464 | for (pp = &mp->ports; | |
465 | (p = mlock_dereference(*pp, src->br)) != NULL; | |
466 | pp = &p->next) { | |
467 | if (!br_port_group_equal(p, pg->key.port, pg->eth_addr)) | |
468 | continue; | |
469 | ||
470 | if (p->rt_protocol != RTPROT_KERNEL && | |
471 | (p->flags & MDB_PG_FLAGS_PERMANENT)) | |
472 | break; | |
473 | ||
d5a10222 NA |
474 | if (fastleave) |
475 | p->flags |= MDB_PG_FLAGS_FAST_LEAVE; | |
b0812368 NA |
476 | br_multicast_del_pg(mp, p, pp); |
477 | break; | |
478 | } | |
479 | src->flags &= ~BR_SGRP_F_INSTALLED; | |
480 | } | |
481 | ||
9116ffbf | 482 | /* install S,G and based on src's timer enable or disable forwarding */ |
b0812368 NA |
483 | static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src) |
484 | { | |
9116ffbf NA |
485 | struct net_bridge_port_group_sg_key sg_key; |
486 | struct net_bridge_port_group *sg; | |
487 | u8 old_flags; | |
488 | ||
b0812368 | 489 | br_multicast_fwd_src_add(src); |
9116ffbf NA |
490 | |
491 | memset(&sg_key, 0, sizeof(sg_key)); | |
492 | sg_key.addr = src->pg->key.addr; | |
493 | sg_key.addr.src = src->addr.src; | |
494 | sg_key.port = src->pg->key.port; | |
495 | ||
496 | sg = br_sg_port_find(src->br, &sg_key); | |
497 | if (!sg || (sg->flags & MDB_PG_FLAGS_PERMANENT)) | |
498 | return; | |
499 | ||
500 | old_flags = sg->flags; | |
501 | if (timer_pending(&src->timer)) | |
502 | sg->flags &= ~MDB_PG_FLAGS_BLOCKED; | |
503 | else | |
504 | sg->flags |= MDB_PG_FLAGS_BLOCKED; | |
505 | ||
506 | if (old_flags != sg->flags) { | |
507 | struct net_bridge_mdb_entry *sg_mp; | |
508 | ||
509 | sg_mp = br_mdb_ip_get(src->br, &sg_key.addr); | |
510 | if (!sg_mp) | |
511 | return; | |
512 | br_mdb_notify(src->br->dev, sg_mp, sg, RTM_NEWMDB); | |
513 | } | |
b0812368 NA |
514 | } |
515 | ||
e12cec65 NA |
516 | static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc) |
517 | { | |
518 | struct net_bridge_mdb_entry *mp; | |
519 | ||
520 | mp = container_of(gc, struct net_bridge_mdb_entry, mcast_gc); | |
521 | WARN_ON(!hlist_unhashed(&mp->mdb_node)); | |
522 | WARN_ON(mp->ports); | |
523 | ||
524 | del_timer_sync(&mp->timer); | |
525 | kfree_rcu(mp, rcu); | |
526 | } | |
527 | ||
528 | static void br_multicast_del_mdb_entry(struct net_bridge_mdb_entry *mp) | |
529 | { | |
530 | struct net_bridge *br = mp->br; | |
531 | ||
532 | rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode, | |
533 | br_mdb_rht_params); | |
534 | hlist_del_init_rcu(&mp->mdb_node); | |
535 | hlist_add_head(&mp->mcast_gc.gc_node, &br->mcast_gc_list); | |
536 | queue_work(system_long_wq, &br->mcast_gc_work); | |
537 | } | |
538 | ||
88c1f37f | 539 | static void br_multicast_group_expired(struct timer_list *t) |
eb1d1641 | 540 | { |
88c1f37f | 541 | struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer); |
eb1d1641 | 542 | struct net_bridge *br = mp->br; |
eb1d1641 HX |
543 | |
544 | spin_lock(&br->multicast_lock); | |
b0812368 NA |
545 | if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) || |
546 | timer_pending(&mp->timer)) | |
eb1d1641 HX |
547 | goto out; |
548 | ||
1bc844ee | 549 | br_multicast_host_leave(mp, true); |
eb1d1641 HX |
550 | |
551 | if (mp->ports) | |
552 | goto out; | |
e12cec65 NA |
553 | br_multicast_del_mdb_entry(mp); |
554 | out: | |
555 | spin_unlock(&br->multicast_lock); | |
556 | } | |
eb1d1641 | 557 | |
e12cec65 NA |
558 | static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc) |
559 | { | |
560 | struct net_bridge_group_src *src; | |
eb1d1641 | 561 | |
e12cec65 NA |
562 | src = container_of(gc, struct net_bridge_group_src, mcast_gc); |
563 | WARN_ON(!hlist_unhashed(&src->node)); | |
eb1d1641 | 564 | |
e12cec65 NA |
565 | del_timer_sync(&src->timer); |
566 | kfree_rcu(src, rcu); | |
eb1d1641 HX |
567 | } |
568 | ||
d5a10222 NA |
569 | void br_multicast_del_group_src(struct net_bridge_group_src *src, |
570 | bool fastleave) | |
8b671779 | 571 | { |
085b53c8 | 572 | struct net_bridge *br = src->pg->key.port->br; |
8b671779 | 573 | |
d5a10222 | 574 | br_multicast_fwd_src_remove(src, fastleave); |
8b671779 NA |
575 | hlist_del_init_rcu(&src->node); |
576 | src->pg->src_ents--; | |
e12cec65 NA |
577 | hlist_add_head(&src->mcast_gc.gc_node, &br->mcast_gc_list); |
578 | queue_work(system_long_wq, &br->mcast_gc_work); | |
579 | } | |
580 | ||
581 | static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc) | |
582 | { | |
583 | struct net_bridge_port_group *pg; | |
584 | ||
585 | pg = container_of(gc, struct net_bridge_port_group, mcast_gc); | |
586 | WARN_ON(!hlist_unhashed(&pg->mglist)); | |
587 | WARN_ON(!hlist_empty(&pg->src_list)); | |
588 | ||
589 | del_timer_sync(&pg->rexmit_timer); | |
590 | del_timer_sync(&pg->timer); | |
591 | kfree_rcu(pg, rcu); | |
8b671779 NA |
592 | } |
593 | ||
681590bd NA |
594 | void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, |
595 | struct net_bridge_port_group *pg, | |
596 | struct net_bridge_port_group __rcu **pp) | |
597 | { | |
085b53c8 | 598 | struct net_bridge *br = pg->key.port->br; |
8b671779 NA |
599 | struct net_bridge_group_src *ent; |
600 | struct hlist_node *tmp; | |
681590bd NA |
601 | |
602 | rcu_assign_pointer(*pp, pg->next); | |
603 | hlist_del_init(&pg->mglist); | |
baa74d39 | 604 | br_multicast_eht_clean_sets(pg); |
8b671779 | 605 | hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node) |
d5a10222 | 606 | br_multicast_del_group_src(ent, false); |
81f19838 | 607 | br_mdb_notify(br->dev, mp, pg, RTM_DELMDB); |
74705582 NA |
608 | if (!br_multicast_is_star_g(&mp->addr)) { |
609 | rhashtable_remove_fast(&br->sg_port_tbl, &pg->rhnode, | |
610 | br_sg_port_rht_params); | |
8266a049 | 611 | br_multicast_sg_del_exclude_ports(mp); |
74705582 | 612 | } else { |
8266a049 | 613 | br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE); |
74705582 | 614 | } |
e12cec65 NA |
615 | hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list); |
616 | queue_work(system_long_wq, &br->mcast_gc_work); | |
681590bd NA |
617 | |
618 | if (!mp->ports && !mp->host_joined && netif_running(br->dev)) | |
619 | mod_timer(&mp->timer, jiffies); | |
620 | } | |
621 | ||
622 | static void br_multicast_find_del_pg(struct net_bridge *br, | |
623 | struct net_bridge_port_group *pg) | |
eb1d1641 | 624 | { |
8b671779 | 625 | struct net_bridge_port_group __rcu **pp; |
eb1d1641 HX |
626 | struct net_bridge_mdb_entry *mp; |
627 | struct net_bridge_port_group *p; | |
e8051688 | 628 | |
085b53c8 | 629 | mp = br_mdb_ip_get(br, &pg->key.addr); |
eb1d1641 HX |
630 | if (WARN_ON(!mp)) |
631 | return; | |
632 | ||
e8051688 ED |
633 | for (pp = &mp->ports; |
634 | (p = mlock_dereference(*pp, br)) != NULL; | |
635 | pp = &p->next) { | |
eb1d1641 HX |
636 | if (p != pg) |
637 | continue; | |
638 | ||
681590bd | 639 | br_multicast_del_pg(mp, pg, pp); |
eb1d1641 HX |
640 | return; |
641 | } | |
642 | ||
643 | WARN_ON(1); | |
644 | } | |
645 | ||
88c1f37f | 646 | static void br_multicast_port_group_expired(struct timer_list *t) |
eb1d1641 | 647 | { |
88c1f37f | 648 | struct net_bridge_port_group *pg = from_timer(pg, t, timer); |
d6c33d67 | 649 | struct net_bridge_group_src *src_ent; |
085b53c8 | 650 | struct net_bridge *br = pg->key.port->br; |
d6c33d67 NA |
651 | struct hlist_node *tmp; |
652 | bool changed; | |
eb1d1641 HX |
653 | |
654 | spin_lock(&br->multicast_lock); | |
655 | if (!netif_running(br->dev) || timer_pending(&pg->timer) || | |
9d06b6d8 | 656 | hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT) |
eb1d1641 HX |
657 | goto out; |
658 | ||
d6c33d67 NA |
659 | changed = !!(pg->filter_mode == MCAST_EXCLUDE); |
660 | pg->filter_mode = MCAST_INCLUDE; | |
661 | hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) { | |
662 | if (!timer_pending(&src_ent->timer)) { | |
d5a10222 | 663 | br_multicast_del_group_src(src_ent, false); |
d6c33d67 NA |
664 | changed = true; |
665 | } | |
666 | } | |
667 | ||
668 | if (hlist_empty(&pg->src_list)) { | |
669 | br_multicast_find_del_pg(br, pg); | |
670 | } else if (changed) { | |
085b53c8 | 671 | struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr); |
eb1d1641 | 672 | |
8266a049 NA |
673 | if (changed && br_multicast_is_star_g(&pg->key.addr)) |
674 | br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE); | |
675 | ||
d6c33d67 NA |
676 | if (WARN_ON(!mp)) |
677 | goto out; | |
678 | br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB); | |
679 | } | |
eb1d1641 HX |
680 | out: |
681 | spin_unlock(&br->multicast_lock); | |
682 | } | |
683 | ||
e12cec65 NA |
684 | static void br_multicast_gc(struct hlist_head *head) |
685 | { | |
686 | struct net_bridge_mcast_gc *gcent; | |
687 | struct hlist_node *tmp; | |
688 | ||
689 | hlist_for_each_entry_safe(gcent, tmp, head, gc_node) { | |
690 | hlist_del_init(&gcent->gc_node); | |
691 | gcent->destroy(gcent); | |
692 | } | |
693 | } | |
694 | ||
8ef2a9a5 | 695 | static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br, |
438ef2d0 NA |
696 | struct net_bridge_port_group *pg, |
697 | __be32 ip_dst, __be32 group, | |
698 | bool with_srcs, bool over_lmqt, | |
42c11ccf NA |
699 | u8 sflag, u8 *igmp_type, |
700 | bool *need_rexmit) | |
eb1d1641 | 701 | { |
085b53c8 | 702 | struct net_bridge_port *p = pg ? pg->key.port : NULL; |
438ef2d0 NA |
703 | struct net_bridge_group_src *ent; |
704 | size_t pkt_size, igmp_hdr_size; | |
705 | unsigned long now = jiffies; | |
5e923585 | 706 | struct igmpv3_query *ihv3; |
438ef2d0 NA |
707 | void *csum_start = NULL; |
708 | __sum16 *csum = NULL; | |
eb1d1641 HX |
709 | struct sk_buff *skb; |
710 | struct igmphdr *ih; | |
711 | struct ethhdr *eth; | |
438ef2d0 | 712 | unsigned long lmqt; |
eb1d1641 | 713 | struct iphdr *iph; |
438ef2d0 | 714 | u16 lmqt_srcs = 0; |
eb1d1641 | 715 | |
5e923585 | 716 | igmp_hdr_size = sizeof(*ih); |
438ef2d0 | 717 | if (br->multicast_igmp_version == 3) { |
5e923585 | 718 | igmp_hdr_size = sizeof(*ihv3); |
438ef2d0 NA |
719 | if (pg && with_srcs) { |
720 | lmqt = now + (br->multicast_last_member_interval * | |
721 | br->multicast_last_member_count); | |
722 | hlist_for_each_entry(ent, &pg->src_list, node) { | |
723 | if (over_lmqt == time_after(ent->timer.expires, | |
724 | lmqt) && | |
725 | ent->src_query_rexmit_cnt > 0) | |
726 | lmqt_srcs++; | |
727 | } | |
728 | ||
729 | if (!lmqt_srcs) | |
730 | return NULL; | |
731 | igmp_hdr_size += lmqt_srcs * sizeof(__be32); | |
732 | } | |
733 | } | |
734 | ||
735 | pkt_size = sizeof(*eth) + sizeof(*iph) + 4 + igmp_hdr_size; | |
736 | if ((p && pkt_size > p->dev->mtu) || | |
737 | pkt_size > br->dev->mtu) | |
738 | return NULL; | |
739 | ||
740 | skb = netdev_alloc_skb_ip_align(br->dev, pkt_size); | |
eb1d1641 HX |
741 | if (!skb) |
742 | goto out; | |
743 | ||
744 | skb->protocol = htons(ETH_P_IP); | |
745 | ||
746 | skb_reset_mac_header(skb); | |
747 | eth = eth_hdr(skb); | |
748 | ||
e5a727f6 | 749 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
438ef2d0 | 750 | ip_eth_mc_map(ip_dst, eth->h_dest); |
eb1d1641 HX |
751 | eth->h_proto = htons(ETH_P_IP); |
752 | skb_put(skb, sizeof(*eth)); | |
753 | ||
754 | skb_set_network_header(skb, skb->len); | |
755 | iph = ip_hdr(skb); | |
438ef2d0 | 756 | iph->tot_len = htons(pkt_size - sizeof(*eth)); |
eb1d1641 HX |
757 | |
758 | iph->version = 4; | |
759 | iph->ihl = 6; | |
760 | iph->tos = 0xc0; | |
eb1d1641 HX |
761 | iph->id = 0; |
762 | iph->frag_off = htons(IP_DF); | |
763 | iph->ttl = 1; | |
764 | iph->protocol = IPPROTO_IGMP; | |
675779ad | 765 | iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ? |
1c8ad5bf | 766 | inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0; |
438ef2d0 | 767 | iph->daddr = ip_dst; |
eb1d1641 HX |
768 | ((u8 *)&iph[1])[0] = IPOPT_RA; |
769 | ((u8 *)&iph[1])[1] = 4; | |
770 | ((u8 *)&iph[1])[2] = 0; | |
771 | ((u8 *)&iph[1])[3] = 0; | |
772 | ip_send_check(iph); | |
773 | skb_put(skb, 24); | |
774 | ||
775 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 776 | *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY; |
eb1d1641 | 777 | |
5e923585 NA |
778 | switch (br->multicast_igmp_version) { |
779 | case 2: | |
780 | ih = igmp_hdr(skb); | |
781 | ih->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
782 | ih->code = (group ? br->multicast_last_member_interval : | |
783 | br->multicast_query_response_interval) / | |
784 | (HZ / IGMP_TIMER_SCALE); | |
785 | ih->group = group; | |
786 | ih->csum = 0; | |
438ef2d0 NA |
787 | csum = &ih->csum; |
788 | csum_start = (void *)ih; | |
5e923585 NA |
789 | break; |
790 | case 3: | |
791 | ihv3 = igmpv3_query_hdr(skb); | |
792 | ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
793 | ihv3->code = (group ? br->multicast_last_member_interval : | |
794 | br->multicast_query_response_interval) / | |
795 | (HZ / IGMP_TIMER_SCALE); | |
796 | ihv3->group = group; | |
797 | ihv3->qqic = br->multicast_query_interval / HZ; | |
438ef2d0 | 798 | ihv3->nsrcs = htons(lmqt_srcs); |
5e923585 | 799 | ihv3->resv = 0; |
438ef2d0 | 800 | ihv3->suppress = sflag; |
5e923585 NA |
801 | ihv3->qrv = 2; |
802 | ihv3->csum = 0; | |
438ef2d0 NA |
803 | csum = &ihv3->csum; |
804 | csum_start = (void *)ihv3; | |
805 | if (!pg || !with_srcs) | |
806 | break; | |
807 | ||
808 | lmqt_srcs = 0; | |
809 | hlist_for_each_entry(ent, &pg->src_list, node) { | |
810 | if (over_lmqt == time_after(ent->timer.expires, | |
811 | lmqt) && | |
812 | ent->src_query_rexmit_cnt > 0) { | |
deb96566 | 813 | ihv3->srcs[lmqt_srcs++] = ent->addr.src.ip4; |
438ef2d0 | 814 | ent->src_query_rexmit_cnt--; |
42c11ccf NA |
815 | if (need_rexmit && ent->src_query_rexmit_cnt) |
816 | *need_rexmit = true; | |
438ef2d0 NA |
817 | } |
818 | } | |
819 | if (WARN_ON(lmqt_srcs != ntohs(ihv3->nsrcs))) { | |
820 | kfree_skb(skb); | |
821 | return NULL; | |
822 | } | |
5e923585 NA |
823 | break; |
824 | } | |
825 | ||
438ef2d0 NA |
826 | if (WARN_ON(!csum || !csum_start)) { |
827 | kfree_skb(skb); | |
828 | return NULL; | |
829 | } | |
830 | ||
831 | *csum = ip_compute_csum(csum_start, igmp_hdr_size); | |
5e923585 | 832 | skb_put(skb, igmp_hdr_size); |
eb1d1641 HX |
833 | __skb_pull(skb, sizeof(*eth)); |
834 | ||
835 | out: | |
836 | return skb; | |
837 | } | |
838 | ||
dfd56b8b | 839 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 840 | static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, |
438ef2d0 NA |
841 | struct net_bridge_port_group *pg, |
842 | const struct in6_addr *ip6_dst, | |
843 | const struct in6_addr *group, | |
844 | bool with_srcs, bool over_llqt, | |
42c11ccf NA |
845 | u8 sflag, u8 *igmp_type, |
846 | bool *need_rexmit) | |
08b202b6 | 847 | { |
085b53c8 | 848 | struct net_bridge_port *p = pg ? pg->key.port : NULL; |
438ef2d0 NA |
849 | struct net_bridge_group_src *ent; |
850 | size_t pkt_size, mld_hdr_size; | |
851 | unsigned long now = jiffies; | |
aa2ae3e7 | 852 | struct mld2_query *mld2q; |
438ef2d0 | 853 | void *csum_start = NULL; |
aa2ae3e7 | 854 | unsigned long interval; |
438ef2d0 | 855 | __sum16 *csum = NULL; |
08b202b6 YH |
856 | struct ipv6hdr *ip6h; |
857 | struct mld_msg *mldq; | |
aa2ae3e7 | 858 | struct sk_buff *skb; |
438ef2d0 | 859 | unsigned long llqt; |
08b202b6 | 860 | struct ethhdr *eth; |
438ef2d0 | 861 | u16 llqt_srcs = 0; |
08b202b6 | 862 | u8 *hopopt; |
08b202b6 | 863 | |
aa2ae3e7 | 864 | mld_hdr_size = sizeof(*mldq); |
438ef2d0 | 865 | if (br->multicast_mld_version == 2) { |
aa2ae3e7 | 866 | mld_hdr_size = sizeof(*mld2q); |
438ef2d0 NA |
867 | if (pg && with_srcs) { |
868 | llqt = now + (br->multicast_last_member_interval * | |
869 | br->multicast_last_member_count); | |
870 | hlist_for_each_entry(ent, &pg->src_list, node) { | |
871 | if (over_llqt == time_after(ent->timer.expires, | |
872 | llqt) && | |
873 | ent->src_query_rexmit_cnt > 0) | |
874 | llqt_srcs++; | |
875 | } | |
876 | ||
877 | if (!llqt_srcs) | |
878 | return NULL; | |
879 | mld_hdr_size += llqt_srcs * sizeof(struct in6_addr); | |
880 | } | |
881 | } | |
882 | ||
883 | pkt_size = sizeof(*eth) + sizeof(*ip6h) + 8 + mld_hdr_size; | |
884 | if ((p && pkt_size > p->dev->mtu) || | |
885 | pkt_size > br->dev->mtu) | |
886 | return NULL; | |
887 | ||
888 | skb = netdev_alloc_skb_ip_align(br->dev, pkt_size); | |
08b202b6 YH |
889 | if (!skb) |
890 | goto out; | |
891 | ||
892 | skb->protocol = htons(ETH_P_IPV6); | |
893 | ||
894 | /* Ethernet header */ | |
895 | skb_reset_mac_header(skb); | |
896 | eth = eth_hdr(skb); | |
897 | ||
e5a727f6 | 898 | ether_addr_copy(eth->h_source, br->dev->dev_addr); |
08b202b6 YH |
899 | eth->h_proto = htons(ETH_P_IPV6); |
900 | skb_put(skb, sizeof(*eth)); | |
901 | ||
902 | /* IPv6 header + HbH option */ | |
903 | skb_set_network_header(skb, skb->len); | |
904 | ip6h = ipv6_hdr(skb); | |
905 | ||
906 | *(__force __be32 *)ip6h = htonl(0x60000000); | |
aa2ae3e7 | 907 | ip6h->payload_len = htons(8 + mld_hdr_size); |
08b202b6 YH |
908 | ip6h->nexthdr = IPPROTO_HOPOPTS; |
909 | ip6h->hop_limit = 1; | |
438ef2d0 | 910 | ip6h->daddr = *ip6_dst; |
d1d81d4c UW |
911 | if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, |
912 | &ip6h->saddr)) { | |
913 | kfree_skb(skb); | |
675779ad | 914 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false); |
d1d81d4c UW |
915 | return NULL; |
916 | } | |
0888d5f3 | 917 | |
675779ad | 918 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); |
36cff5a1 | 919 | ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); |
08b202b6 YH |
920 | |
921 | hopopt = (u8 *)(ip6h + 1); | |
922 | hopopt[0] = IPPROTO_ICMPV6; /* next hdr */ | |
923 | hopopt[1] = 0; /* length of HbH */ | |
924 | hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */ | |
925 | hopopt[3] = 2; /* Length of RA Option */ | |
926 | hopopt[4] = 0; /* Type = 0x0000 (MLD) */ | |
927 | hopopt[5] = 0; | |
1de5a71c EZ |
928 | hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */ |
929 | hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */ | |
08b202b6 YH |
930 | |
931 | skb_put(skb, sizeof(*ip6h) + 8); | |
932 | ||
933 | /* ICMPv6 */ | |
934 | skb_set_transport_header(skb, skb->len); | |
438ef2d0 | 935 | interval = ipv6_addr_any(group) ? |
32de868c LL |
936 | br->multicast_query_response_interval : |
937 | br->multicast_last_member_interval; | |
1080ab95 | 938 | *igmp_type = ICMPV6_MGM_QUERY; |
aa2ae3e7 NA |
939 | switch (br->multicast_mld_version) { |
940 | case 1: | |
941 | mldq = (struct mld_msg *)icmp6_hdr(skb); | |
942 | mldq->mld_type = ICMPV6_MGM_QUERY; | |
943 | mldq->mld_code = 0; | |
944 | mldq->mld_cksum = 0; | |
945 | mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval)); | |
946 | mldq->mld_reserved = 0; | |
438ef2d0 NA |
947 | mldq->mld_mca = *group; |
948 | csum = &mldq->mld_cksum; | |
949 | csum_start = (void *)mldq; | |
aa2ae3e7 NA |
950 | break; |
951 | case 2: | |
952 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
53631a5f | 953 | mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval)); |
aa2ae3e7 NA |
954 | mld2q->mld2q_type = ICMPV6_MGM_QUERY; |
955 | mld2q->mld2q_code = 0; | |
956 | mld2q->mld2q_cksum = 0; | |
957 | mld2q->mld2q_resv1 = 0; | |
958 | mld2q->mld2q_resv2 = 0; | |
438ef2d0 | 959 | mld2q->mld2q_suppress = sflag; |
aa2ae3e7 | 960 | mld2q->mld2q_qrv = 2; |
438ef2d0 | 961 | mld2q->mld2q_nsrcs = htons(llqt_srcs); |
aa2ae3e7 | 962 | mld2q->mld2q_qqic = br->multicast_query_interval / HZ; |
438ef2d0 NA |
963 | mld2q->mld2q_mca = *group; |
964 | csum = &mld2q->mld2q_cksum; | |
965 | csum_start = (void *)mld2q; | |
966 | if (!pg || !with_srcs) | |
967 | break; | |
968 | ||
969 | llqt_srcs = 0; | |
970 | hlist_for_each_entry(ent, &pg->src_list, node) { | |
971 | if (over_llqt == time_after(ent->timer.expires, | |
972 | llqt) && | |
973 | ent->src_query_rexmit_cnt > 0) { | |
deb96566 | 974 | mld2q->mld2q_srcs[llqt_srcs++] = ent->addr.src.ip6; |
438ef2d0 | 975 | ent->src_query_rexmit_cnt--; |
42c11ccf NA |
976 | if (need_rexmit && ent->src_query_rexmit_cnt) |
977 | *need_rexmit = true; | |
438ef2d0 NA |
978 | } |
979 | } | |
980 | if (WARN_ON(llqt_srcs != ntohs(mld2q->mld2q_nsrcs))) { | |
981 | kfree_skb(skb); | |
982 | return NULL; | |
983 | } | |
aa2ae3e7 NA |
984 | break; |
985 | } | |
08b202b6 | 986 | |
438ef2d0 NA |
987 | if (WARN_ON(!csum || !csum_start)) { |
988 | kfree_skb(skb); | |
989 | return NULL; | |
990 | } | |
991 | ||
992 | *csum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, mld_hdr_size, | |
993 | IPPROTO_ICMPV6, | |
994 | csum_partial(csum_start, mld_hdr_size, 0)); | |
995 | skb_put(skb, mld_hdr_size); | |
08b202b6 YH |
996 | __skb_pull(skb, sizeof(*eth)); |
997 | ||
998 | out: | |
999 | return skb; | |
1000 | } | |
1001 | #endif | |
1002 | ||
8ef2a9a5 | 1003 | static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br, |
438ef2d0 NA |
1004 | struct net_bridge_port_group *pg, |
1005 | struct br_ip *ip_dst, | |
1006 | struct br_ip *group, | |
1007 | bool with_srcs, bool over_lmqt, | |
42c11ccf NA |
1008 | u8 sflag, u8 *igmp_type, |
1009 | bool *need_rexmit) | |
8ef2a9a5 | 1010 | { |
438ef2d0 NA |
1011 | __be32 ip4_dst; |
1012 | ||
1013 | switch (group->proto) { | |
8ef2a9a5 | 1014 | case htons(ETH_P_IP): |
eab3227b | 1015 | ip4_dst = ip_dst ? ip_dst->dst.ip4 : htonl(INADDR_ALLHOSTS_GROUP); |
438ef2d0 | 1016 | return br_ip4_multicast_alloc_query(br, pg, |
eab3227b | 1017 | ip4_dst, group->dst.ip4, |
438ef2d0 | 1018 | with_srcs, over_lmqt, |
42c11ccf NA |
1019 | sflag, igmp_type, |
1020 | need_rexmit); | |
dfd56b8b | 1021 | #if IS_ENABLED(CONFIG_IPV6) |
438ef2d0 NA |
1022 | case htons(ETH_P_IPV6): { |
1023 | struct in6_addr ip6_dst; | |
1024 | ||
1025 | if (ip_dst) | |
eab3227b | 1026 | ip6_dst = ip_dst->dst.ip6; |
438ef2d0 NA |
1027 | else |
1028 | ipv6_addr_set(&ip6_dst, htonl(0xff020000), 0, 0, | |
1029 | htonl(1)); | |
1030 | ||
1031 | return br_ip6_multicast_alloc_query(br, pg, | |
eab3227b | 1032 | &ip6_dst, &group->dst.ip6, |
438ef2d0 | 1033 | with_srcs, over_lmqt, |
42c11ccf NA |
1034 | sflag, igmp_type, |
1035 | need_rexmit); | |
438ef2d0 | 1036 | } |
08b202b6 | 1037 | #endif |
8ef2a9a5 YH |
1038 | } |
1039 | return NULL; | |
1040 | } | |
1041 | ||
cfd56754 | 1042 | struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, |
5e923585 | 1043 | struct br_ip *group) |
eb1d1641 | 1044 | { |
eb1d1641 | 1045 | struct net_bridge_mdb_entry *mp; |
4c0833bc | 1046 | int err; |
eb1d1641 | 1047 | |
19e3a9c9 NA |
1048 | mp = br_mdb_ip_get(br, group); |
1049 | if (mp) | |
1050 | return mp; | |
eb1d1641 | 1051 | |
19e3a9c9 NA |
1052 | if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) { |
1053 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false); | |
1054 | return ERR_PTR(-E2BIG); | |
eb1d1641 HX |
1055 | } |
1056 | ||
1057 | mp = kzalloc(sizeof(*mp), GFP_ATOMIC); | |
1058 | if (unlikely(!mp)) | |
4c0833bc | 1059 | return ERR_PTR(-ENOMEM); |
eb1d1641 HX |
1060 | |
1061 | mp->br = br; | |
8ef2a9a5 | 1062 | mp->addr = *group; |
e12cec65 | 1063 | mp->mcast_gc.destroy = br_multicast_destroy_mdb_entry; |
88c1f37f | 1064 | timer_setup(&mp->timer, br_multicast_group_expired, 0); |
19e3a9c9 NA |
1065 | err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode, |
1066 | br_mdb_rht_params); | |
1067 | if (err) { | |
1068 | kfree(mp); | |
1069 | mp = ERR_PTR(err); | |
1070 | } else { | |
1071 | hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list); | |
1072 | } | |
1faabf2a | 1073 | |
eb1d1641 HX |
1074 | return mp; |
1075 | } | |
1076 | ||
8b671779 NA |
1077 | static void br_multicast_group_src_expired(struct timer_list *t) |
1078 | { | |
1079 | struct net_bridge_group_src *src = from_timer(src, t, timer); | |
1080 | struct net_bridge_port_group *pg; | |
1081 | struct net_bridge *br = src->br; | |
1082 | ||
1083 | spin_lock(&br->multicast_lock); | |
1084 | if (hlist_unhashed(&src->node) || !netif_running(br->dev) || | |
1085 | timer_pending(&src->timer)) | |
1086 | goto out; | |
1087 | ||
1088 | pg = src->pg; | |
1089 | if (pg->filter_mode == MCAST_INCLUDE) { | |
d5a10222 | 1090 | br_multicast_del_group_src(src, false); |
8b671779 NA |
1091 | if (!hlist_empty(&pg->src_list)) |
1092 | goto out; | |
1093 | br_multicast_find_del_pg(br, pg); | |
9116ffbf NA |
1094 | } else { |
1095 | br_multicast_fwd_src_handle(src); | |
8b671779 | 1096 | } |
9116ffbf | 1097 | |
8b671779 NA |
1098 | out: |
1099 | spin_unlock(&br->multicast_lock); | |
1100 | } | |
1101 | ||
474ddb37 | 1102 | struct net_bridge_group_src * |
8b671779 NA |
1103 | br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip) |
1104 | { | |
1105 | struct net_bridge_group_src *ent; | |
1106 | ||
1107 | switch (ip->proto) { | |
1108 | case htons(ETH_P_IP): | |
1109 | hlist_for_each_entry(ent, &pg->src_list, node) | |
deb96566 | 1110 | if (ip->src.ip4 == ent->addr.src.ip4) |
8b671779 NA |
1111 | return ent; |
1112 | break; | |
1113 | #if IS_ENABLED(CONFIG_IPV6) | |
1114 | case htons(ETH_P_IPV6): | |
1115 | hlist_for_each_entry(ent, &pg->src_list, node) | |
deb96566 | 1116 | if (!ipv6_addr_cmp(&ent->addr.src.ip6, &ip->src.ip6)) |
8b671779 NA |
1117 | return ent; |
1118 | break; | |
1119 | #endif | |
1120 | } | |
1121 | ||
1122 | return NULL; | |
1123 | } | |
1124 | ||
1125 | static struct net_bridge_group_src * | |
1126 | br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip) | |
1127 | { | |
1128 | struct net_bridge_group_src *grp_src; | |
1129 | ||
1130 | if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT)) | |
1131 | return NULL; | |
1132 | ||
1133 | switch (src_ip->proto) { | |
1134 | case htons(ETH_P_IP): | |
deb96566 NA |
1135 | if (ipv4_is_zeronet(src_ip->src.ip4) || |
1136 | ipv4_is_multicast(src_ip->src.ip4)) | |
8b671779 NA |
1137 | return NULL; |
1138 | break; | |
1139 | #if IS_ENABLED(CONFIG_IPV6) | |
1140 | case htons(ETH_P_IPV6): | |
deb96566 NA |
1141 | if (ipv6_addr_any(&src_ip->src.ip6) || |
1142 | ipv6_addr_is_multicast(&src_ip->src.ip6)) | |
8b671779 NA |
1143 | return NULL; |
1144 | break; | |
1145 | #endif | |
1146 | } | |
1147 | ||
1148 | grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC); | |
1149 | if (unlikely(!grp_src)) | |
1150 | return NULL; | |
1151 | ||
1152 | grp_src->pg = pg; | |
085b53c8 | 1153 | grp_src->br = pg->key.port->br; |
8b671779 | 1154 | grp_src->addr = *src_ip; |
e12cec65 | 1155 | grp_src->mcast_gc.destroy = br_multicast_destroy_group_src; |
8b671779 NA |
1156 | timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0); |
1157 | ||
1158 | hlist_add_head_rcu(&grp_src->node, &pg->src_list); | |
1159 | pg->src_ents++; | |
1160 | ||
1161 | return grp_src; | |
1162 | } | |
1163 | ||
cfd56754 CW |
1164 | struct net_bridge_port_group *br_multicast_new_port_group( |
1165 | struct net_bridge_port *port, | |
1166 | struct br_ip *group, | |
ccb1c31a | 1167 | struct net_bridge_port_group __rcu *next, |
6db6f0ea | 1168 | unsigned char flags, |
8b671779 | 1169 | const unsigned char *src, |
8f8cb77e NA |
1170 | u8 filter_mode, |
1171 | u8 rt_protocol) | |
cfd56754 CW |
1172 | { |
1173 | struct net_bridge_port_group *p; | |
1174 | ||
1175 | p = kzalloc(sizeof(*p), GFP_ATOMIC); | |
1176 | if (unlikely(!p)) | |
1177 | return NULL; | |
1178 | ||
085b53c8 NA |
1179 | p->key.addr = *group; |
1180 | p->key.port = port; | |
9d06b6d8 | 1181 | p->flags = flags; |
8b671779 | 1182 | p->filter_mode = filter_mode; |
8f8cb77e | 1183 | p->rt_protocol = rt_protocol; |
5b163288 | 1184 | p->eht_host_tree = RB_ROOT; |
baa74d39 | 1185 | p->eht_set_tree = RB_ROOT; |
e12cec65 | 1186 | p->mcast_gc.destroy = br_multicast_destroy_port_group; |
8b671779 | 1187 | INIT_HLIST_HEAD(&p->src_list); |
085b53c8 NA |
1188 | |
1189 | if (!br_multicast_is_star_g(group) && | |
1190 | rhashtable_lookup_insert_fast(&port->br->sg_port_tbl, &p->rhnode, | |
1191 | br_sg_port_rht_params)) { | |
1192 | kfree(p); | |
1193 | return NULL; | |
1194 | } | |
1195 | ||
eca2a43b | 1196 | rcu_assign_pointer(p->next, next); |
88c1f37f | 1197 | timer_setup(&p->timer, br_multicast_port_group_expired, 0); |
42c11ccf NA |
1198 | timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0); |
1199 | hlist_add_head(&p->mglist, &port->mglist); | |
6db6f0ea FF |
1200 | |
1201 | if (src) | |
1202 | memcpy(p->eth_addr, src, ETH_ALEN); | |
1203 | else | |
1bfe45f4 | 1204 | eth_broadcast_addr(p->eth_addr); |
6db6f0ea | 1205 | |
cfd56754 CW |
1206 | return p; |
1207 | } | |
1208 | ||
1bc844ee NA |
1209 | void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify) |
1210 | { | |
1211 | if (!mp->host_joined) { | |
1212 | mp->host_joined = true; | |
094b82fd NA |
1213 | if (br_multicast_is_star_g(&mp->addr)) |
1214 | br_multicast_star_g_host_state(mp); | |
1bc844ee | 1215 | if (notify) |
81f19838 | 1216 | br_mdb_notify(mp->br->dev, mp, NULL, RTM_NEWMDB); |
1bc844ee | 1217 | } |
955062b0 NA |
1218 | |
1219 | if (br_group_is_l2(&mp->addr)) | |
1220 | return; | |
1221 | ||
1bc844ee NA |
1222 | mod_timer(&mp->timer, jiffies + mp->br->multicast_membership_interval); |
1223 | } | |
1224 | ||
1225 | void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify) | |
1226 | { | |
1227 | if (!mp->host_joined) | |
1228 | return; | |
1229 | ||
1230 | mp->host_joined = false; | |
094b82fd NA |
1231 | if (br_multicast_is_star_g(&mp->addr)) |
1232 | br_multicast_star_g_host_state(mp); | |
1bc844ee | 1233 | if (notify) |
81f19838 | 1234 | br_mdb_notify(mp->br->dev, mp, NULL, RTM_DELMDB); |
1bc844ee NA |
1235 | } |
1236 | ||
b0812368 NA |
1237 | static struct net_bridge_port_group * |
1238 | __br_multicast_add_group(struct net_bridge *br, | |
1239 | struct net_bridge_port *port, | |
1240 | struct br_ip *group, | |
1241 | const unsigned char *src, | |
1242 | u8 filter_mode, | |
9116ffbf NA |
1243 | bool igmpv2_mldv1, |
1244 | bool blocked) | |
eb1d1641 | 1245 | { |
e8051688 | 1246 | struct net_bridge_port_group __rcu **pp; |
b0812368 | 1247 | struct net_bridge_port_group *p = NULL; |
5e923585 | 1248 | struct net_bridge_mdb_entry *mp; |
454594f3 | 1249 | unsigned long now = jiffies; |
eb1d1641 | 1250 | |
eb1d1641 HX |
1251 | if (!netif_running(br->dev) || |
1252 | (port && port->state == BR_STATE_DISABLED)) | |
1253 | goto out; | |
1254 | ||
19e3a9c9 | 1255 | mp = br_multicast_new_group(br, group); |
4c0833bc | 1256 | if (IS_ERR(mp)) |
1697291d | 1257 | return ERR_CAST(mp); |
eb1d1641 HX |
1258 | |
1259 | if (!port) { | |
1bc844ee | 1260 | br_multicast_host_join(mp, true); |
eb1d1641 HX |
1261 | goto out; |
1262 | } | |
1263 | ||
e8051688 ED |
1264 | for (pp = &mp->ports; |
1265 | (p = mlock_dereference(*pp, br)) != NULL; | |
1266 | pp = &p->next) { | |
6db6f0ea | 1267 | if (br_port_group_equal(p, port, src)) |
454594f3 | 1268 | goto found; |
085b53c8 | 1269 | if ((unsigned long)p->key.port < (unsigned long)port) |
eb1d1641 HX |
1270 | break; |
1271 | } | |
1272 | ||
955062b0 NA |
1273 | p = br_multicast_new_port_group(port, group, *pp, 0, src, |
1274 | filter_mode, RTPROT_KERNEL); | |
b0812368 NA |
1275 | if (unlikely(!p)) { |
1276 | p = ERR_PTR(-ENOMEM); | |
1277 | goto out; | |
1278 | } | |
eb1d1641 | 1279 | rcu_assign_pointer(*pp, p); |
9116ffbf NA |
1280 | if (blocked) |
1281 | p->flags |= MDB_PG_FLAGS_BLOCKED; | |
81f19838 | 1282 | br_mdb_notify(br->dev, mp, p, RTM_NEWMDB); |
eb1d1641 | 1283 | |
454594f3 | 1284 | found: |
0436862e NA |
1285 | if (igmpv2_mldv1) |
1286 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
81f19838 | 1287 | |
eb1d1641 | 1288 | out: |
b0812368 NA |
1289 | return p; |
1290 | } | |
1291 | ||
1292 | static int br_multicast_add_group(struct net_bridge *br, | |
1293 | struct net_bridge_port *port, | |
1294 | struct br_ip *group, | |
1295 | const unsigned char *src, | |
1296 | u8 filter_mode, | |
1297 | bool igmpv2_mldv1) | |
1298 | { | |
1299 | struct net_bridge_port_group *pg; | |
1300 | int err; | |
eb1d1641 | 1301 | |
b0812368 NA |
1302 | spin_lock(&br->multicast_lock); |
1303 | pg = __br_multicast_add_group(br, port, group, src, filter_mode, | |
9116ffbf | 1304 | igmpv2_mldv1, false); |
b0812368 | 1305 | /* NULL is considered valid for host joined groups */ |
8d21c882 | 1306 | err = PTR_ERR_OR_ZERO(pg); |
eb1d1641 | 1307 | spin_unlock(&br->multicast_lock); |
b0812368 | 1308 | |
eb1d1641 HX |
1309 | return err; |
1310 | } | |
1311 | ||
8ef2a9a5 YH |
1312 | static int br_ip4_multicast_add_group(struct net_bridge *br, |
1313 | struct net_bridge_port *port, | |
b0e9a30d | 1314 | __be32 group, |
6db6f0ea | 1315 | __u16 vid, |
8b671779 NA |
1316 | const unsigned char *src, |
1317 | bool igmpv2) | |
8ef2a9a5 YH |
1318 | { |
1319 | struct br_ip br_group; | |
8b671779 | 1320 | u8 filter_mode; |
8ef2a9a5 YH |
1321 | |
1322 | if (ipv4_is_local_multicast(group)) | |
1323 | return 0; | |
1324 | ||
1515a63f | 1325 | memset(&br_group, 0, sizeof(br_group)); |
eab3227b | 1326 | br_group.dst.ip4 = group; |
8ef2a9a5 | 1327 | br_group.proto = htons(ETH_P_IP); |
b0e9a30d | 1328 | br_group.vid = vid; |
8b671779 | 1329 | filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE; |
8ef2a9a5 | 1330 | |
0436862e NA |
1331 | return br_multicast_add_group(br, port, &br_group, src, filter_mode, |
1332 | igmpv2); | |
8ef2a9a5 YH |
1333 | } |
1334 | ||
dfd56b8b | 1335 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
1336 | static int br_ip6_multicast_add_group(struct net_bridge *br, |
1337 | struct net_bridge_port *port, | |
b0e9a30d | 1338 | const struct in6_addr *group, |
6db6f0ea | 1339 | __u16 vid, |
8b671779 NA |
1340 | const unsigned char *src, |
1341 | bool mldv1) | |
08b202b6 YH |
1342 | { |
1343 | struct br_ip br_group; | |
8b671779 | 1344 | u8 filter_mode; |
08b202b6 | 1345 | |
3c3769e6 | 1346 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
1347 | return 0; |
1348 | ||
19e3a9c9 | 1349 | memset(&br_group, 0, sizeof(br_group)); |
eab3227b | 1350 | br_group.dst.ip6 = *group; |
9cc6e0c4 | 1351 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 1352 | br_group.vid = vid; |
8b671779 | 1353 | filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE; |
08b202b6 | 1354 | |
0436862e NA |
1355 | return br_multicast_add_group(br, port, &br_group, src, filter_mode, |
1356 | mldv1); | |
08b202b6 YH |
1357 | } |
1358 | #endif | |
1359 | ||
ed2d3597 LL |
1360 | static bool br_multicast_rport_del(struct hlist_node *rlist) |
1361 | { | |
1362 | if (hlist_unhashed(rlist)) | |
1363 | return false; | |
1364 | ||
1365 | hlist_del_init_rcu(rlist); | |
1366 | return true; | |
1367 | } | |
1368 | ||
1369 | static bool br_ip4_multicast_rport_del(struct net_bridge_port *p) | |
1370 | { | |
1371 | return br_multicast_rport_del(&p->ip4_rlist); | |
1372 | } | |
1373 | ||
a3c02e76 LL |
1374 | static bool br_ip6_multicast_rport_del(struct net_bridge_port *p) |
1375 | { | |
1376 | #if IS_ENABLED(CONFIG_IPV6) | |
1377 | return br_multicast_rport_del(&p->ip6_rlist); | |
1378 | #else | |
1379 | return false; | |
1380 | #endif | |
1381 | } | |
1382 | ||
ee5fb222 LL |
1383 | static void br_multicast_router_expired(struct net_bridge_port *port, |
1384 | struct timer_list *t, | |
1385 | struct hlist_node *rlist) | |
eb1d1641 | 1386 | { |
eb1d1641 | 1387 | struct net_bridge *br = port->br; |
ed2d3597 | 1388 | bool del; |
eb1d1641 HX |
1389 | |
1390 | spin_lock(&br->multicast_lock); | |
a55d8246 NA |
1391 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
1392 | port->multicast_router == MDB_RTR_TYPE_PERM || | |
ee5fb222 | 1393 | timer_pending(t)) |
eb1d1641 HX |
1394 | goto out; |
1395 | ||
ed2d3597 LL |
1396 | del = br_multicast_rport_del(rlist); |
1397 | br_multicast_rport_del_notify(port, del); | |
eb1d1641 HX |
1398 | out: |
1399 | spin_unlock(&br->multicast_lock); | |
1400 | } | |
1401 | ||
ee5fb222 LL |
1402 | static void br_ip4_multicast_router_expired(struct timer_list *t) |
1403 | { | |
1404 | struct net_bridge_port *port = from_timer(port, t, ip4_mc_router_timer); | |
1405 | ||
1406 | br_multicast_router_expired(port, t, &port->ip4_rlist); | |
1407 | } | |
1408 | ||
a3c02e76 LL |
1409 | #if IS_ENABLED(CONFIG_IPV6) |
1410 | static void br_ip6_multicast_router_expired(struct timer_list *t) | |
1411 | { | |
1412 | struct net_bridge_port *port = from_timer(port, t, ip6_mc_router_timer); | |
1413 | ||
1414 | br_multicast_router_expired(port, t, &port->ip6_rlist); | |
1415 | } | |
1416 | #endif | |
1417 | ||
77041420 YG |
1418 | static void br_mc_router_state_change(struct net_bridge *p, |
1419 | bool is_mc_router) | |
1420 | { | |
1421 | struct switchdev_attr attr = { | |
1422 | .orig_dev = p->dev, | |
1423 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER, | |
1424 | .flags = SWITCHDEV_F_DEFER, | |
1425 | .u.mrouter = is_mc_router, | |
1426 | }; | |
1427 | ||
dcbdf135 | 1428 | switchdev_port_attr_set(p->dev, &attr, NULL); |
77041420 YG |
1429 | } |
1430 | ||
ee5fb222 LL |
1431 | static void br_multicast_local_router_expired(struct net_bridge *br, |
1432 | struct timer_list *timer) | |
eb1d1641 | 1433 | { |
77041420 YG |
1434 | spin_lock(&br->multicast_lock); |
1435 | if (br->multicast_router == MDB_RTR_TYPE_DISABLED || | |
1436 | br->multicast_router == MDB_RTR_TYPE_PERM || | |
1a3065a2 LL |
1437 | br_ip4_multicast_is_router(br) || |
1438 | br_ip6_multicast_is_router(br)) | |
77041420 YG |
1439 | goto out; |
1440 | ||
1441 | br_mc_router_state_change(br, false); | |
1442 | out: | |
1443 | spin_unlock(&br->multicast_lock); | |
eb1d1641 HX |
1444 | } |
1445 | ||
ee5fb222 LL |
1446 | static void br_ip4_multicast_local_router_expired(struct timer_list *t) |
1447 | { | |
1448 | struct net_bridge *br = from_timer(br, t, ip4_mc_router_timer); | |
1449 | ||
1450 | br_multicast_local_router_expired(br, t); | |
1451 | } | |
1452 | ||
a3c02e76 LL |
1453 | #if IS_ENABLED(CONFIG_IPV6) |
1454 | static void br_ip6_multicast_local_router_expired(struct timer_list *t) | |
1455 | { | |
1456 | struct net_bridge *br = from_timer(br, t, ip6_mc_router_timer); | |
1457 | ||
1458 | br_multicast_local_router_expired(br, t); | |
1459 | } | |
1460 | #endif | |
1461 | ||
cc0fdd80 | 1462 | static void br_multicast_querier_expired(struct net_bridge *br, |
90010b36 | 1463 | struct bridge_mcast_own_query *query) |
c83b8fab | 1464 | { |
c83b8fab | 1465 | spin_lock(&br->multicast_lock); |
13cefad2 | 1466 | if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
c83b8fab HX |
1467 | goto out; |
1468 | ||
cc0fdd80 | 1469 | br_multicast_start_querier(br, query); |
c83b8fab HX |
1470 | |
1471 | out: | |
1472 | spin_unlock(&br->multicast_lock); | |
1473 | } | |
1474 | ||
88c1f37f | 1475 | static void br_ip4_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 1476 | { |
88c1f37f | 1477 | struct net_bridge *br = from_timer(br, t, ip4_other_query.timer); |
cc0fdd80 | 1478 | |
90010b36 | 1479 | br_multicast_querier_expired(br, &br->ip4_own_query); |
cc0fdd80 LL |
1480 | } |
1481 | ||
1482 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 1483 | static void br_ip6_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 1484 | { |
88c1f37f | 1485 | struct net_bridge *br = from_timer(br, t, ip6_other_query.timer); |
cc0fdd80 | 1486 | |
90010b36 | 1487 | br_multicast_querier_expired(br, &br->ip6_own_query); |
cc0fdd80 LL |
1488 | } |
1489 | #endif | |
1490 | ||
dc4eb53a LL |
1491 | static void br_multicast_select_own_querier(struct net_bridge *br, |
1492 | struct br_ip *ip, | |
1493 | struct sk_buff *skb) | |
1494 | { | |
1495 | if (ip->proto == htons(ETH_P_IP)) | |
deb96566 | 1496 | br->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr; |
dc4eb53a LL |
1497 | #if IS_ENABLED(CONFIG_IPV6) |
1498 | else | |
deb96566 | 1499 | br->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr; |
dc4eb53a LL |
1500 | #endif |
1501 | } | |
1502 | ||
8ef2a9a5 YH |
1503 | static void __br_multicast_send_query(struct net_bridge *br, |
1504 | struct net_bridge_port *port, | |
438ef2d0 NA |
1505 | struct net_bridge_port_group *pg, |
1506 | struct br_ip *ip_dst, | |
1507 | struct br_ip *group, | |
1508 | bool with_srcs, | |
42c11ccf NA |
1509 | u8 sflag, |
1510 | bool *need_rexmit) | |
eb1d1641 | 1511 | { |
438ef2d0 | 1512 | bool over_lmqt = !!sflag; |
eb1d1641 | 1513 | struct sk_buff *skb; |
1080ab95 | 1514 | u8 igmp_type; |
eb1d1641 | 1515 | |
438ef2d0 NA |
1516 | again_under_lmqt: |
1517 | skb = br_multicast_alloc_query(br, pg, ip_dst, group, with_srcs, | |
42c11ccf NA |
1518 | over_lmqt, sflag, &igmp_type, |
1519 | need_rexmit); | |
eb1d1641 | 1520 | if (!skb) |
8ef2a9a5 | 1521 | return; |
eb1d1641 HX |
1522 | |
1523 | if (port) { | |
eb1d1641 | 1524 | skb->dev = port->dev; |
a65056ec | 1525 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 1526 | BR_MCAST_DIR_TX); |
29a26a56 EB |
1527 | NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, |
1528 | dev_net(port->dev), NULL, skb, NULL, skb->dev, | |
f0b4eece | 1529 | br_dev_queue_push_xmit); |
438ef2d0 NA |
1530 | |
1531 | if (over_lmqt && with_srcs && sflag) { | |
1532 | over_lmqt = false; | |
1533 | goto again_under_lmqt; | |
1534 | } | |
dc4eb53a | 1535 | } else { |
438ef2d0 | 1536 | br_multicast_select_own_querier(br, group, skb); |
a65056ec | 1537 | br_multicast_count(br, port, skb, igmp_type, |
1080ab95 | 1538 | BR_MCAST_DIR_RX); |
eb1d1641 | 1539 | netif_rx(skb); |
dc4eb53a | 1540 | } |
8ef2a9a5 YH |
1541 | } |
1542 | ||
1543 | static void br_multicast_send_query(struct net_bridge *br, | |
cc0fdd80 | 1544 | struct net_bridge_port *port, |
90010b36 | 1545 | struct bridge_mcast_own_query *own_query) |
8ef2a9a5 | 1546 | { |
90010b36 | 1547 | struct bridge_mcast_other_query *other_query = NULL; |
5e923585 NA |
1548 | struct br_ip br_group; |
1549 | unsigned long time; | |
8ef2a9a5 | 1550 | |
13cefad2 NA |
1551 | if (!netif_running(br->dev) || |
1552 | !br_opt_get(br, BROPT_MULTICAST_ENABLED) || | |
675779ad | 1553 | !br_opt_get(br, BROPT_MULTICAST_QUERIER)) |
8ef2a9a5 YH |
1554 | return; |
1555 | ||
eab3227b | 1556 | memset(&br_group.dst, 0, sizeof(br_group.dst)); |
08b202b6 | 1557 | |
90010b36 LL |
1558 | if (port ? (own_query == &port->ip4_own_query) : |
1559 | (own_query == &br->ip4_own_query)) { | |
1560 | other_query = &br->ip4_other_query; | |
cc0fdd80 | 1561 | br_group.proto = htons(ETH_P_IP); |
dfd56b8b | 1562 | #if IS_ENABLED(CONFIG_IPV6) |
cc0fdd80 | 1563 | } else { |
90010b36 | 1564 | other_query = &br->ip6_other_query; |
cc0fdd80 | 1565 | br_group.proto = htons(ETH_P_IPV6); |
08b202b6 | 1566 | #endif |
cc0fdd80 LL |
1567 | } |
1568 | ||
90010b36 | 1569 | if (!other_query || timer_pending(&other_query->timer)) |
cc0fdd80 LL |
1570 | return; |
1571 | ||
42c11ccf NA |
1572 | __br_multicast_send_query(br, port, NULL, NULL, &br_group, false, 0, |
1573 | NULL); | |
eb1d1641 | 1574 | |
eb1d1641 | 1575 | time = jiffies; |
90010b36 | 1576 | time += own_query->startup_sent < br->multicast_startup_query_count ? |
eb1d1641 HX |
1577 | br->multicast_startup_query_interval : |
1578 | br->multicast_query_interval; | |
90010b36 | 1579 | mod_timer(&own_query->timer, time); |
eb1d1641 HX |
1580 | } |
1581 | ||
90010b36 LL |
1582 | static void |
1583 | br_multicast_port_query_expired(struct net_bridge_port *port, | |
1584 | struct bridge_mcast_own_query *query) | |
eb1d1641 | 1585 | { |
eb1d1641 HX |
1586 | struct net_bridge *br = port->br; |
1587 | ||
1588 | spin_lock(&br->multicast_lock); | |
02a780c0 DC |
1589 | if (port->state == BR_STATE_DISABLED || |
1590 | port->state == BR_STATE_BLOCKING) | |
eb1d1641 HX |
1591 | goto out; |
1592 | ||
cc0fdd80 LL |
1593 | if (query->startup_sent < br->multicast_startup_query_count) |
1594 | query->startup_sent++; | |
eb1d1641 | 1595 | |
cc0fdd80 | 1596 | br_multicast_send_query(port->br, port, query); |
eb1d1641 HX |
1597 | |
1598 | out: | |
1599 | spin_unlock(&br->multicast_lock); | |
1600 | } | |
1601 | ||
88c1f37f | 1602 | static void br_ip4_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 1603 | { |
88c1f37f | 1604 | struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer); |
cc0fdd80 | 1605 | |
90010b36 | 1606 | br_multicast_port_query_expired(port, &port->ip4_own_query); |
cc0fdd80 LL |
1607 | } |
1608 | ||
1609 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 1610 | static void br_ip6_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 1611 | { |
88c1f37f | 1612 | struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer); |
cc0fdd80 | 1613 | |
90010b36 | 1614 | br_multicast_port_query_expired(port, &port->ip6_own_query); |
cc0fdd80 LL |
1615 | } |
1616 | #endif | |
1617 | ||
42c11ccf NA |
1618 | static void br_multicast_port_group_rexmit(struct timer_list *t) |
1619 | { | |
1620 | struct net_bridge_port_group *pg = from_timer(pg, t, rexmit_timer); | |
1621 | struct bridge_mcast_other_query *other_query = NULL; | |
085b53c8 | 1622 | struct net_bridge *br = pg->key.port->br; |
42c11ccf NA |
1623 | bool need_rexmit = false; |
1624 | ||
1625 | spin_lock(&br->multicast_lock); | |
1626 | if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) || | |
1627 | !br_opt_get(br, BROPT_MULTICAST_ENABLED) || | |
1628 | !br_opt_get(br, BROPT_MULTICAST_QUERIER)) | |
1629 | goto out; | |
1630 | ||
085b53c8 | 1631 | if (pg->key.addr.proto == htons(ETH_P_IP)) |
42c11ccf NA |
1632 | other_query = &br->ip4_other_query; |
1633 | #if IS_ENABLED(CONFIG_IPV6) | |
1634 | else | |
1635 | other_query = &br->ip6_other_query; | |
1636 | #endif | |
1637 | ||
1638 | if (!other_query || timer_pending(&other_query->timer)) | |
1639 | goto out; | |
1640 | ||
1641 | if (pg->grp_query_rexmit_cnt) { | |
1642 | pg->grp_query_rexmit_cnt--; | |
085b53c8 NA |
1643 | __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr, |
1644 | &pg->key.addr, false, 1, NULL); | |
42c11ccf | 1645 | } |
085b53c8 NA |
1646 | __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr, |
1647 | &pg->key.addr, true, 0, &need_rexmit); | |
42c11ccf NA |
1648 | |
1649 | if (pg->grp_query_rexmit_cnt || need_rexmit) | |
1650 | mod_timer(&pg->rexmit_timer, jiffies + | |
1651 | br->multicast_last_member_interval); | |
1652 | out: | |
1653 | spin_unlock(&br->multicast_lock); | |
1654 | } | |
1655 | ||
ae1ea84b FF |
1656 | static int br_mc_disabled_update(struct net_device *dev, bool value, |
1657 | struct netlink_ext_ack *extack) | |
147c1e9b NF |
1658 | { |
1659 | struct switchdev_attr attr = { | |
1660 | .orig_dev = dev, | |
1661 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED, | |
1662 | .flags = SWITCHDEV_F_DEFER, | |
13cefad2 | 1663 | .u.mc_disabled = !value, |
147c1e9b NF |
1664 | }; |
1665 | ||
ae1ea84b | 1666 | return switchdev_port_attr_set(dev, &attr, extack); |
147c1e9b NF |
1667 | } |
1668 | ||
1080ab95 | 1669 | int br_multicast_add_port(struct net_bridge_port *port) |
eb1d1641 | 1670 | { |
ae1ea84b FF |
1671 | int err; |
1672 | ||
7f0aec7a | 1673 | port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
89268b05 | 1674 | port->multicast_eht_hosts_limit = BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT; |
eb1d1641 | 1675 | |
ce6f7097 | 1676 | timer_setup(&port->ip4_mc_router_timer, |
ee5fb222 | 1677 | br_ip4_multicast_router_expired, 0); |
88c1f37f AP |
1678 | timer_setup(&port->ip4_own_query.timer, |
1679 | br_ip4_multicast_port_query_expired, 0); | |
cc0fdd80 | 1680 | #if IS_ENABLED(CONFIG_IPV6) |
a3c02e76 LL |
1681 | timer_setup(&port->ip6_mc_router_timer, |
1682 | br_ip6_multicast_router_expired, 0); | |
88c1f37f AP |
1683 | timer_setup(&port->ip6_own_query.timer, |
1684 | br_ip6_multicast_port_query_expired, 0); | |
cc0fdd80 | 1685 | #endif |
ae1ea84b FF |
1686 | err = br_mc_disabled_update(port->dev, |
1687 | br_opt_get(port->br, | |
1688 | BROPT_MULTICAST_ENABLED), | |
1689 | NULL); | |
68f5c12a | 1690 | if (err && err != -EOPNOTSUPP) |
ae1ea84b | 1691 | return err; |
147c1e9b | 1692 | |
1080ab95 NA |
1693 | port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); |
1694 | if (!port->mcast_stats) | |
1695 | return -ENOMEM; | |
1696 | ||
1697 | return 0; | |
eb1d1641 HX |
1698 | } |
1699 | ||
1700 | void br_multicast_del_port(struct net_bridge_port *port) | |
1701 | { | |
e10177ab SA |
1702 | struct net_bridge *br = port->br; |
1703 | struct net_bridge_port_group *pg; | |
e12cec65 | 1704 | HLIST_HEAD(deleted_head); |
e10177ab SA |
1705 | struct hlist_node *n; |
1706 | ||
1707 | /* Take care of the remaining groups, only perm ones should be left */ | |
1708 | spin_lock_bh(&br->multicast_lock); | |
1709 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) | |
681590bd | 1710 | br_multicast_find_del_pg(br, pg); |
e12cec65 | 1711 | hlist_move_list(&br->mcast_gc_list, &deleted_head); |
e10177ab | 1712 | spin_unlock_bh(&br->multicast_lock); |
e12cec65 | 1713 | br_multicast_gc(&deleted_head); |
ce6f7097 | 1714 | del_timer_sync(&port->ip4_mc_router_timer); |
a3c02e76 LL |
1715 | #if IS_ENABLED(CONFIG_IPV6) |
1716 | del_timer_sync(&port->ip6_mc_router_timer); | |
1717 | #endif | |
1080ab95 | 1718 | free_percpu(port->mcast_stats); |
eb1d1641 HX |
1719 | } |
1720 | ||
90010b36 | 1721 | static void br_multicast_enable(struct bridge_mcast_own_query *query) |
561f1103 | 1722 | { |
cc0fdd80 | 1723 | query->startup_sent = 0; |
561f1103 | 1724 | |
cc0fdd80 LL |
1725 | if (try_to_del_timer_sync(&query->timer) >= 0 || |
1726 | del_timer(&query->timer)) | |
1727 | mod_timer(&query->timer, jiffies); | |
561f1103 HX |
1728 | } |
1729 | ||
7cb3f921 | 1730 | static void __br_multicast_enable_port(struct net_bridge_port *port) |
eb1d1641 HX |
1731 | { |
1732 | struct net_bridge *br = port->br; | |
1733 | ||
13cefad2 | 1734 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev)) |
7cb3f921 | 1735 | return; |
eb1d1641 | 1736 | |
90010b36 | 1737 | br_multicast_enable(&port->ip4_own_query); |
cc0fdd80 | 1738 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 1739 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 1740 | #endif |
a3c02e76 | 1741 | if (port->multicast_router == MDB_RTR_TYPE_PERM) { |
d9b8c4d8 | 1742 | br_ip4_multicast_add_router(br, port); |
a3c02e76 LL |
1743 | br_ip6_multicast_add_router(br, port); |
1744 | } | |
7cb3f921 | 1745 | } |
eb1d1641 | 1746 | |
7cb3f921 NA |
1747 | void br_multicast_enable_port(struct net_bridge_port *port) |
1748 | { | |
1749 | struct net_bridge *br = port->br; | |
1750 | ||
1751 | spin_lock(&br->multicast_lock); | |
1752 | __br_multicast_enable_port(port); | |
eb1d1641 HX |
1753 | spin_unlock(&br->multicast_lock); |
1754 | } | |
1755 | ||
1756 | void br_multicast_disable_port(struct net_bridge_port *port) | |
1757 | { | |
1758 | struct net_bridge *br = port->br; | |
1759 | struct net_bridge_port_group *pg; | |
b67bfe0d | 1760 | struct hlist_node *n; |
ed2d3597 | 1761 | bool del = false; |
eb1d1641 HX |
1762 | |
1763 | spin_lock(&br->multicast_lock); | |
b67bfe0d | 1764 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) |
9d06b6d8 | 1765 | if (!(pg->flags & MDB_PG_FLAGS_PERMANENT)) |
681590bd | 1766 | br_multicast_find_del_pg(br, pg); |
eb1d1641 | 1767 | |
ed2d3597 | 1768 | del |= br_ip4_multicast_rport_del(port); |
ce6f7097 | 1769 | del_timer(&port->ip4_mc_router_timer); |
90010b36 | 1770 | del_timer(&port->ip4_own_query.timer); |
a3c02e76 | 1771 | del |= br_ip6_multicast_rport_del(port); |
cc0fdd80 | 1772 | #if IS_ENABLED(CONFIG_IPV6) |
a3c02e76 | 1773 | del_timer(&port->ip6_mc_router_timer); |
90010b36 | 1774 | del_timer(&port->ip6_own_query.timer); |
cc0fdd80 | 1775 | #endif |
ed2d3597 | 1776 | br_multicast_rport_del_notify(port, del); |
eb1d1641 HX |
1777 | spin_unlock(&br->multicast_lock); |
1778 | } | |
1779 | ||
e6231bca NA |
1780 | static int __grp_src_delete_marked(struct net_bridge_port_group *pg) |
1781 | { | |
1782 | struct net_bridge_group_src *ent; | |
1783 | struct hlist_node *tmp; | |
1784 | int deleted = 0; | |
1785 | ||
1786 | hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node) | |
1787 | if (ent->flags & BR_SGRP_F_DELETE) { | |
d5a10222 | 1788 | br_multicast_del_group_src(ent, false); |
e6231bca NA |
1789 | deleted++; |
1790 | } | |
1791 | ||
1792 | return deleted; | |
1793 | } | |
1794 | ||
b0812368 NA |
1795 | static void __grp_src_mod_timer(struct net_bridge_group_src *src, |
1796 | unsigned long expires) | |
1797 | { | |
1798 | mod_timer(&src->timer, expires); | |
1799 | br_multicast_fwd_src_handle(src); | |
1800 | } | |
1801 | ||
5bf1e00b NA |
1802 | static void __grp_src_query_marked_and_rexmit(struct net_bridge_port_group *pg) |
1803 | { | |
1804 | struct bridge_mcast_other_query *other_query = NULL; | |
085b53c8 | 1805 | struct net_bridge *br = pg->key.port->br; |
5bf1e00b NA |
1806 | u32 lmqc = br->multicast_last_member_count; |
1807 | unsigned long lmqt, lmi, now = jiffies; | |
1808 | struct net_bridge_group_src *ent; | |
1809 | ||
1810 | if (!netif_running(br->dev) || | |
1811 | !br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
1812 | return; | |
1813 | ||
085b53c8 | 1814 | if (pg->key.addr.proto == htons(ETH_P_IP)) |
5bf1e00b NA |
1815 | other_query = &br->ip4_other_query; |
1816 | #if IS_ENABLED(CONFIG_IPV6) | |
1817 | else | |
1818 | other_query = &br->ip6_other_query; | |
1819 | #endif | |
1820 | ||
1821 | lmqt = now + br_multicast_lmqt(br); | |
1822 | hlist_for_each_entry(ent, &pg->src_list, node) { | |
1823 | if (ent->flags & BR_SGRP_F_SEND) { | |
1824 | ent->flags &= ~BR_SGRP_F_SEND; | |
1825 | if (ent->timer.expires > lmqt) { | |
1826 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER) && | |
1827 | other_query && | |
1828 | !timer_pending(&other_query->timer)) | |
1829 | ent->src_query_rexmit_cnt = lmqc; | |
b0812368 | 1830 | __grp_src_mod_timer(ent, lmqt); |
5bf1e00b NA |
1831 | } |
1832 | } | |
1833 | } | |
1834 | ||
1835 | if (!br_opt_get(br, BROPT_MULTICAST_QUERIER) || | |
1836 | !other_query || timer_pending(&other_query->timer)) | |
1837 | return; | |
1838 | ||
085b53c8 NA |
1839 | __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr, |
1840 | &pg->key.addr, true, 1, NULL); | |
5bf1e00b NA |
1841 | |
1842 | lmi = now + br->multicast_last_member_interval; | |
1843 | if (!timer_pending(&pg->rexmit_timer) || | |
1844 | time_after(pg->rexmit_timer.expires, lmi)) | |
1845 | mod_timer(&pg->rexmit_timer, lmi); | |
1846 | } | |
1847 | ||
1848 | static void __grp_send_query_and_rexmit(struct net_bridge_port_group *pg) | |
1849 | { | |
1850 | struct bridge_mcast_other_query *other_query = NULL; | |
085b53c8 | 1851 | struct net_bridge *br = pg->key.port->br; |
5bf1e00b NA |
1852 | unsigned long now = jiffies, lmi; |
1853 | ||
1854 | if (!netif_running(br->dev) || | |
1855 | !br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
1856 | return; | |
1857 | ||
085b53c8 | 1858 | if (pg->key.addr.proto == htons(ETH_P_IP)) |
5bf1e00b NA |
1859 | other_query = &br->ip4_other_query; |
1860 | #if IS_ENABLED(CONFIG_IPV6) | |
1861 | else | |
1862 | other_query = &br->ip6_other_query; | |
1863 | #endif | |
1864 | ||
1865 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER) && | |
1866 | other_query && !timer_pending(&other_query->timer)) { | |
1867 | lmi = now + br->multicast_last_member_interval; | |
1868 | pg->grp_query_rexmit_cnt = br->multicast_last_member_count - 1; | |
085b53c8 NA |
1869 | __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr, |
1870 | &pg->key.addr, false, 0, NULL); | |
5bf1e00b NA |
1871 | if (!timer_pending(&pg->rexmit_timer) || |
1872 | time_after(pg->rexmit_timer.expires, lmi)) | |
1873 | mod_timer(&pg->rexmit_timer, lmi); | |
1874 | } | |
1875 | ||
1876 | if (pg->filter_mode == MCAST_EXCLUDE && | |
1877 | (!timer_pending(&pg->timer) || | |
1878 | time_after(pg->timer.expires, now + br_multicast_lmqt(br)))) | |
1879 | mod_timer(&pg->timer, now + br_multicast_lmqt(br)); | |
1880 | } | |
1881 | ||
0436862e NA |
1882 | /* State Msg type New state Actions |
1883 | * INCLUDE (A) IS_IN (B) INCLUDE (A+B) (B)=GMI | |
1884 | * INCLUDE (A) ALLOW (B) INCLUDE (A+B) (B)=GMI | |
1885 | * EXCLUDE (X,Y) ALLOW (A) EXCLUDE (X+A,Y-A) (A)=GMI | |
1886 | */ | |
54bea721 | 1887 | static bool br_multicast_isinc_allow(struct net_bridge_port_group *pg, void *h_addr, |
474ddb37 NA |
1888 | void *srcs, u32 nsrcs, size_t addr_size, |
1889 | int grec_type) | |
0436862e | 1890 | { |
085b53c8 | 1891 | struct net_bridge *br = pg->key.port->br; |
0436862e NA |
1892 | struct net_bridge_group_src *ent; |
1893 | unsigned long now = jiffies; | |
1894 | bool changed = false; | |
1895 | struct br_ip src_ip; | |
1896 | u32 src_idx; | |
1897 | ||
1898 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 1899 | src_ip.proto = pg->key.addr.proto; |
0436862e | 1900 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 1901 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
0436862e NA |
1902 | ent = br_multicast_find_group_src(pg, &src_ip); |
1903 | if (!ent) { | |
1904 | ent = br_multicast_new_group_src(pg, &src_ip); | |
1905 | if (ent) | |
1906 | changed = true; | |
1907 | } | |
1908 | ||
1909 | if (ent) | |
b0812368 | 1910 | __grp_src_mod_timer(ent, now + br_multicast_gmi(br)); |
0436862e NA |
1911 | } |
1912 | ||
474ddb37 NA |
1913 | if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type)) |
1914 | changed = true; | |
1915 | ||
0436862e NA |
1916 | return changed; |
1917 | } | |
1918 | ||
e6231bca NA |
1919 | /* State Msg type New state Actions |
1920 | * INCLUDE (A) IS_EX (B) EXCLUDE (A*B,B-A) (B-A)=0 | |
1921 | * Delete (A-B) | |
1922 | * Group Timer=GMI | |
1923 | */ | |
54bea721 | 1924 | static void __grp_src_isexc_incl(struct net_bridge_port_group *pg, void *h_addr, |
ddc255d9 NA |
1925 | void *srcs, u32 nsrcs, size_t addr_size, |
1926 | int grec_type) | |
e6231bca NA |
1927 | { |
1928 | struct net_bridge_group_src *ent; | |
1929 | struct br_ip src_ip; | |
1930 | u32 src_idx; | |
1931 | ||
1932 | hlist_for_each_entry(ent, &pg->src_list, node) | |
1933 | ent->flags |= BR_SGRP_F_DELETE; | |
1934 | ||
1935 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 1936 | src_ip.proto = pg->key.addr.proto; |
e6231bca | 1937 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 1938 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
e6231bca NA |
1939 | ent = br_multicast_find_group_src(pg, &src_ip); |
1940 | if (ent) | |
1941 | ent->flags &= ~BR_SGRP_F_DELETE; | |
1942 | else | |
b0812368 NA |
1943 | ent = br_multicast_new_group_src(pg, &src_ip); |
1944 | if (ent) | |
1945 | br_multicast_fwd_src_handle(ent); | |
e6231bca NA |
1946 | } |
1947 | ||
ddc255d9 NA |
1948 | br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type); |
1949 | ||
e6231bca NA |
1950 | __grp_src_delete_marked(pg); |
1951 | } | |
1952 | ||
1953 | /* State Msg type New state Actions | |
1954 | * EXCLUDE (X,Y) IS_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=GMI | |
1955 | * Delete (X-A) | |
1956 | * Delete (Y-A) | |
1957 | * Group Timer=GMI | |
1958 | */ | |
54bea721 | 1959 | static bool __grp_src_isexc_excl(struct net_bridge_port_group *pg, void *h_addr, |
ddc255d9 NA |
1960 | void *srcs, u32 nsrcs, size_t addr_size, |
1961 | int grec_type) | |
e6231bca | 1962 | { |
085b53c8 | 1963 | struct net_bridge *br = pg->key.port->br; |
e6231bca NA |
1964 | struct net_bridge_group_src *ent; |
1965 | unsigned long now = jiffies; | |
1966 | bool changed = false; | |
1967 | struct br_ip src_ip; | |
1968 | u32 src_idx; | |
1969 | ||
1970 | hlist_for_each_entry(ent, &pg->src_list, node) | |
1971 | ent->flags |= BR_SGRP_F_DELETE; | |
1972 | ||
1973 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 1974 | src_ip.proto = pg->key.addr.proto; |
e6231bca | 1975 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 1976 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
e6231bca NA |
1977 | ent = br_multicast_find_group_src(pg, &src_ip); |
1978 | if (ent) { | |
1979 | ent->flags &= ~BR_SGRP_F_DELETE; | |
1980 | } else { | |
1981 | ent = br_multicast_new_group_src(pg, &src_ip); | |
1982 | if (ent) { | |
b0812368 NA |
1983 | __grp_src_mod_timer(ent, |
1984 | now + br_multicast_gmi(br)); | |
e6231bca NA |
1985 | changed = true; |
1986 | } | |
1987 | } | |
e6231bca NA |
1988 | } |
1989 | ||
ddc255d9 NA |
1990 | if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type)) |
1991 | changed = true; | |
1992 | ||
e6231bca NA |
1993 | if (__grp_src_delete_marked(pg)) |
1994 | changed = true; | |
1995 | ||
1996 | return changed; | |
1997 | } | |
1998 | ||
54bea721 | 1999 | static bool br_multicast_isexc(struct net_bridge_port_group *pg, void *h_addr, |
ddc255d9 NA |
2000 | void *srcs, u32 nsrcs, size_t addr_size, |
2001 | int grec_type) | |
e6231bca | 2002 | { |
085b53c8 | 2003 | struct net_bridge *br = pg->key.port->br; |
e6231bca NA |
2004 | bool changed = false; |
2005 | ||
2006 | switch (pg->filter_mode) { | |
2007 | case MCAST_INCLUDE: | |
ddc255d9 NA |
2008 | __grp_src_isexc_incl(pg, h_addr, srcs, nsrcs, addr_size, |
2009 | grec_type); | |
8266a049 | 2010 | br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE); |
e6231bca NA |
2011 | changed = true; |
2012 | break; | |
2013 | case MCAST_EXCLUDE: | |
ddc255d9 NA |
2014 | changed = __grp_src_isexc_excl(pg, h_addr, srcs, nsrcs, addr_size, |
2015 | grec_type); | |
e6231bca NA |
2016 | break; |
2017 | } | |
2018 | ||
2019 | pg->filter_mode = MCAST_EXCLUDE; | |
2020 | mod_timer(&pg->timer, jiffies + br_multicast_gmi(br)); | |
2021 | ||
2022 | return changed; | |
2023 | } | |
2024 | ||
5bf1e00b NA |
2025 | /* State Msg type New state Actions |
2026 | * INCLUDE (A) TO_IN (B) INCLUDE (A+B) (B)=GMI | |
2027 | * Send Q(G,A-B) | |
2028 | */ | |
54bea721 | 2029 | static bool __grp_src_toin_incl(struct net_bridge_port_group *pg, void *h_addr, |
ddc255d9 NA |
2030 | void *srcs, u32 nsrcs, size_t addr_size, |
2031 | int grec_type) | |
5bf1e00b | 2032 | { |
085b53c8 | 2033 | struct net_bridge *br = pg->key.port->br; |
5bf1e00b NA |
2034 | u32 src_idx, to_send = pg->src_ents; |
2035 | struct net_bridge_group_src *ent; | |
2036 | unsigned long now = jiffies; | |
2037 | bool changed = false; | |
2038 | struct br_ip src_ip; | |
2039 | ||
2040 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2041 | ent->flags |= BR_SGRP_F_SEND; | |
2042 | ||
2043 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2044 | src_ip.proto = pg->key.addr.proto; |
5bf1e00b | 2045 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2046 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
5bf1e00b NA |
2047 | ent = br_multicast_find_group_src(pg, &src_ip); |
2048 | if (ent) { | |
2049 | ent->flags &= ~BR_SGRP_F_SEND; | |
2050 | to_send--; | |
2051 | } else { | |
2052 | ent = br_multicast_new_group_src(pg, &src_ip); | |
2053 | if (ent) | |
2054 | changed = true; | |
2055 | } | |
2056 | if (ent) | |
b0812368 | 2057 | __grp_src_mod_timer(ent, now + br_multicast_gmi(br)); |
5bf1e00b NA |
2058 | } |
2059 | ||
ddc255d9 NA |
2060 | if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type)) |
2061 | changed = true; | |
2062 | ||
5bf1e00b NA |
2063 | if (to_send) |
2064 | __grp_src_query_marked_and_rexmit(pg); | |
2065 | ||
2066 | return changed; | |
2067 | } | |
2068 | ||
2069 | /* State Msg type New state Actions | |
2070 | * EXCLUDE (X,Y) TO_IN (A) EXCLUDE (X+A,Y-A) (A)=GMI | |
2071 | * Send Q(G,X-A) | |
2072 | * Send Q(G) | |
2073 | */ | |
54bea721 | 2074 | static bool __grp_src_toin_excl(struct net_bridge_port_group *pg, void *h_addr, |
ddc255d9 NA |
2075 | void *srcs, u32 nsrcs, size_t addr_size, |
2076 | int grec_type) | |
5bf1e00b | 2077 | { |
085b53c8 | 2078 | struct net_bridge *br = pg->key.port->br; |
5bf1e00b NA |
2079 | u32 src_idx, to_send = pg->src_ents; |
2080 | struct net_bridge_group_src *ent; | |
2081 | unsigned long now = jiffies; | |
2082 | bool changed = false; | |
2083 | struct br_ip src_ip; | |
2084 | ||
2085 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2086 | if (timer_pending(&ent->timer)) | |
2087 | ent->flags |= BR_SGRP_F_SEND; | |
2088 | ||
2089 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2090 | src_ip.proto = pg->key.addr.proto; |
5bf1e00b | 2091 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2092 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
5bf1e00b NA |
2093 | ent = br_multicast_find_group_src(pg, &src_ip); |
2094 | if (ent) { | |
2095 | if (timer_pending(&ent->timer)) { | |
2096 | ent->flags &= ~BR_SGRP_F_SEND; | |
2097 | to_send--; | |
2098 | } | |
2099 | } else { | |
2100 | ent = br_multicast_new_group_src(pg, &src_ip); | |
2101 | if (ent) | |
2102 | changed = true; | |
2103 | } | |
2104 | if (ent) | |
b0812368 | 2105 | __grp_src_mod_timer(ent, now + br_multicast_gmi(br)); |
5bf1e00b NA |
2106 | } |
2107 | ||
ddc255d9 NA |
2108 | if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type)) |
2109 | changed = true; | |
2110 | ||
5bf1e00b NA |
2111 | if (to_send) |
2112 | __grp_src_query_marked_and_rexmit(pg); | |
2113 | ||
2114 | __grp_send_query_and_rexmit(pg); | |
2115 | ||
2116 | return changed; | |
2117 | } | |
2118 | ||
54bea721 | 2119 | static bool br_multicast_toin(struct net_bridge_port_group *pg, void *h_addr, |
ddc255d9 NA |
2120 | void *srcs, u32 nsrcs, size_t addr_size, |
2121 | int grec_type) | |
5bf1e00b NA |
2122 | { |
2123 | bool changed = false; | |
2124 | ||
2125 | switch (pg->filter_mode) { | |
2126 | case MCAST_INCLUDE: | |
ddc255d9 NA |
2127 | changed = __grp_src_toin_incl(pg, h_addr, srcs, nsrcs, addr_size, |
2128 | grec_type); | |
5bf1e00b NA |
2129 | break; |
2130 | case MCAST_EXCLUDE: | |
ddc255d9 NA |
2131 | changed = __grp_src_toin_excl(pg, h_addr, srcs, nsrcs, addr_size, |
2132 | grec_type); | |
5bf1e00b NA |
2133 | break; |
2134 | } | |
2135 | ||
ddc255d9 | 2136 | if (br_multicast_eht_should_del_pg(pg)) { |
d5a10222 | 2137 | pg->flags |= MDB_PG_FLAGS_FAST_LEAVE; |
ddc255d9 NA |
2138 | br_multicast_find_del_pg(pg->key.port->br, pg); |
2139 | /* a notification has already been sent and we shouldn't | |
2140 | * access pg after the delete so we have to return false | |
2141 | */ | |
2142 | changed = false; | |
2143 | } | |
2144 | ||
5bf1e00b NA |
2145 | return changed; |
2146 | } | |
2147 | ||
2148 | /* State Msg type New state Actions | |
2149 | * INCLUDE (A) TO_EX (B) EXCLUDE (A*B,B-A) (B-A)=0 | |
2150 | * Delete (A-B) | |
2151 | * Send Q(G,A*B) | |
2152 | * Group Timer=GMI | |
2153 | */ | |
54bea721 | 2154 | static void __grp_src_toex_incl(struct net_bridge_port_group *pg, void *h_addr, |
ddc255d9 NA |
2155 | void *srcs, u32 nsrcs, size_t addr_size, |
2156 | int grec_type) | |
5bf1e00b NA |
2157 | { |
2158 | struct net_bridge_group_src *ent; | |
2159 | u32 src_idx, to_send = 0; | |
2160 | struct br_ip src_ip; | |
2161 | ||
2162 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2163 | ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE; | |
2164 | ||
2165 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2166 | src_ip.proto = pg->key.addr.proto; |
5bf1e00b | 2167 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2168 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
5bf1e00b NA |
2169 | ent = br_multicast_find_group_src(pg, &src_ip); |
2170 | if (ent) { | |
2171 | ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) | | |
2172 | BR_SGRP_F_SEND; | |
2173 | to_send++; | |
2174 | } else { | |
b0812368 | 2175 | ent = br_multicast_new_group_src(pg, &src_ip); |
5bf1e00b | 2176 | } |
b0812368 NA |
2177 | if (ent) |
2178 | br_multicast_fwd_src_handle(ent); | |
5bf1e00b NA |
2179 | } |
2180 | ||
ddc255d9 NA |
2181 | br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type); |
2182 | ||
5bf1e00b NA |
2183 | __grp_src_delete_marked(pg); |
2184 | if (to_send) | |
2185 | __grp_src_query_marked_and_rexmit(pg); | |
2186 | } | |
2187 | ||
2188 | /* State Msg type New state Actions | |
2189 | * EXCLUDE (X,Y) TO_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=Group Timer | |
2190 | * Delete (X-A) | |
2191 | * Delete (Y-A) | |
2192 | * Send Q(G,A-Y) | |
2193 | * Group Timer=GMI | |
2194 | */ | |
54bea721 | 2195 | static bool __grp_src_toex_excl(struct net_bridge_port_group *pg, void *h_addr, |
ddc255d9 NA |
2196 | void *srcs, u32 nsrcs, size_t addr_size, |
2197 | int grec_type) | |
5bf1e00b NA |
2198 | { |
2199 | struct net_bridge_group_src *ent; | |
2200 | u32 src_idx, to_send = 0; | |
2201 | bool changed = false; | |
2202 | struct br_ip src_ip; | |
2203 | ||
2204 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2205 | ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE; | |
2206 | ||
2207 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2208 | src_ip.proto = pg->key.addr.proto; |
5bf1e00b | 2209 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2210 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
5bf1e00b NA |
2211 | ent = br_multicast_find_group_src(pg, &src_ip); |
2212 | if (ent) { | |
2213 | ent->flags &= ~BR_SGRP_F_DELETE; | |
2214 | } else { | |
2215 | ent = br_multicast_new_group_src(pg, &src_ip); | |
2216 | if (ent) { | |
b0812368 | 2217 | __grp_src_mod_timer(ent, pg->timer.expires); |
5bf1e00b NA |
2218 | changed = true; |
2219 | } | |
2220 | } | |
2221 | if (ent && timer_pending(&ent->timer)) { | |
2222 | ent->flags |= BR_SGRP_F_SEND; | |
2223 | to_send++; | |
2224 | } | |
5bf1e00b NA |
2225 | } |
2226 | ||
ddc255d9 NA |
2227 | if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type)) |
2228 | changed = true; | |
2229 | ||
5bf1e00b NA |
2230 | if (__grp_src_delete_marked(pg)) |
2231 | changed = true; | |
2232 | if (to_send) | |
2233 | __grp_src_query_marked_and_rexmit(pg); | |
2234 | ||
2235 | return changed; | |
2236 | } | |
2237 | ||
54bea721 | 2238 | static bool br_multicast_toex(struct net_bridge_port_group *pg, void *h_addr, |
ddc255d9 NA |
2239 | void *srcs, u32 nsrcs, size_t addr_size, |
2240 | int grec_type) | |
5bf1e00b | 2241 | { |
085b53c8 | 2242 | struct net_bridge *br = pg->key.port->br; |
5bf1e00b NA |
2243 | bool changed = false; |
2244 | ||
2245 | switch (pg->filter_mode) { | |
2246 | case MCAST_INCLUDE: | |
ddc255d9 NA |
2247 | __grp_src_toex_incl(pg, h_addr, srcs, nsrcs, addr_size, |
2248 | grec_type); | |
8266a049 | 2249 | br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE); |
5bf1e00b NA |
2250 | changed = true; |
2251 | break; | |
2252 | case MCAST_EXCLUDE: | |
ddc255d9 NA |
2253 | changed = __grp_src_toex_excl(pg, h_addr, srcs, nsrcs, addr_size, |
2254 | grec_type); | |
5bf1e00b NA |
2255 | break; |
2256 | } | |
2257 | ||
2258 | pg->filter_mode = MCAST_EXCLUDE; | |
2259 | mod_timer(&pg->timer, jiffies + br_multicast_gmi(br)); | |
2260 | ||
2261 | return changed; | |
2262 | } | |
2263 | ||
109865fe NA |
2264 | /* State Msg type New state Actions |
2265 | * INCLUDE (A) BLOCK (B) INCLUDE (A) Send Q(G,A*B) | |
2266 | */ | |
0ad57c99 | 2267 | static bool __grp_src_block_incl(struct net_bridge_port_group *pg, void *h_addr, |
474ddb37 | 2268 | void *srcs, u32 nsrcs, size_t addr_size, int grec_type) |
109865fe NA |
2269 | { |
2270 | struct net_bridge_group_src *ent; | |
2271 | u32 src_idx, to_send = 0; | |
0ad57c99 | 2272 | bool changed = false; |
109865fe NA |
2273 | struct br_ip src_ip; |
2274 | ||
2275 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2276 | ent->flags &= ~BR_SGRP_F_SEND; | |
2277 | ||
2278 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2279 | src_ip.proto = pg->key.addr.proto; |
109865fe | 2280 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2281 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
109865fe NA |
2282 | ent = br_multicast_find_group_src(pg, &src_ip); |
2283 | if (ent) { | |
2284 | ent->flags |= BR_SGRP_F_SEND; | |
2285 | to_send++; | |
2286 | } | |
109865fe NA |
2287 | } |
2288 | ||
474ddb37 NA |
2289 | if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type)) |
2290 | changed = true; | |
2291 | ||
109865fe NA |
2292 | if (to_send) |
2293 | __grp_src_query_marked_and_rexmit(pg); | |
2294 | ||
0ad57c99 | 2295 | return changed; |
109865fe NA |
2296 | } |
2297 | ||
2298 | /* State Msg type New state Actions | |
2299 | * EXCLUDE (X,Y) BLOCK (A) EXCLUDE (X+(A-Y),Y) (A-X-Y)=Group Timer | |
2300 | * Send Q(G,A-Y) | |
2301 | */ | |
54bea721 | 2302 | static bool __grp_src_block_excl(struct net_bridge_port_group *pg, void *h_addr, |
474ddb37 | 2303 | void *srcs, u32 nsrcs, size_t addr_size, int grec_type) |
109865fe NA |
2304 | { |
2305 | struct net_bridge_group_src *ent; | |
2306 | u32 src_idx, to_send = 0; | |
2307 | bool changed = false; | |
2308 | struct br_ip src_ip; | |
2309 | ||
2310 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2311 | ent->flags &= ~BR_SGRP_F_SEND; | |
2312 | ||
2313 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2314 | src_ip.proto = pg->key.addr.proto; |
109865fe | 2315 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2316 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
109865fe NA |
2317 | ent = br_multicast_find_group_src(pg, &src_ip); |
2318 | if (!ent) { | |
2319 | ent = br_multicast_new_group_src(pg, &src_ip); | |
2320 | if (ent) { | |
b0812368 | 2321 | __grp_src_mod_timer(ent, pg->timer.expires); |
109865fe NA |
2322 | changed = true; |
2323 | } | |
2324 | } | |
2325 | if (ent && timer_pending(&ent->timer)) { | |
2326 | ent->flags |= BR_SGRP_F_SEND; | |
2327 | to_send++; | |
2328 | } | |
109865fe NA |
2329 | } |
2330 | ||
474ddb37 NA |
2331 | if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type)) |
2332 | changed = true; | |
2333 | ||
109865fe NA |
2334 | if (to_send) |
2335 | __grp_src_query_marked_and_rexmit(pg); | |
2336 | ||
2337 | return changed; | |
2338 | } | |
2339 | ||
54bea721 | 2340 | static bool br_multicast_block(struct net_bridge_port_group *pg, void *h_addr, |
474ddb37 | 2341 | void *srcs, u32 nsrcs, size_t addr_size, int grec_type) |
109865fe NA |
2342 | { |
2343 | bool changed = false; | |
2344 | ||
2345 | switch (pg->filter_mode) { | |
2346 | case MCAST_INCLUDE: | |
474ddb37 NA |
2347 | changed = __grp_src_block_incl(pg, h_addr, srcs, nsrcs, addr_size, |
2348 | grec_type); | |
109865fe NA |
2349 | break; |
2350 | case MCAST_EXCLUDE: | |
474ddb37 NA |
2351 | changed = __grp_src_block_excl(pg, h_addr, srcs, nsrcs, addr_size, |
2352 | grec_type); | |
109865fe NA |
2353 | break; |
2354 | } | |
2355 | ||
e87e4b5c NA |
2356 | if ((pg->filter_mode == MCAST_INCLUDE && hlist_empty(&pg->src_list)) || |
2357 | br_multicast_eht_should_del_pg(pg)) { | |
d5a10222 NA |
2358 | if (br_multicast_eht_should_del_pg(pg)) |
2359 | pg->flags |= MDB_PG_FLAGS_FAST_LEAVE; | |
e87e4b5c NA |
2360 | br_multicast_find_del_pg(pg->key.port->br, pg); |
2361 | /* a notification has already been sent and we shouldn't | |
2362 | * access pg after the delete so we have to return false | |
2363 | */ | |
2364 | changed = false; | |
2365 | } | |
2366 | ||
109865fe NA |
2367 | return changed; |
2368 | } | |
2369 | ||
0436862e NA |
2370 | static struct net_bridge_port_group * |
2371 | br_multicast_find_port(struct net_bridge_mdb_entry *mp, | |
2372 | struct net_bridge_port *p, | |
2373 | const unsigned char *src) | |
2374 | { | |
071445c6 | 2375 | struct net_bridge *br __maybe_unused = mp->br; |
0436862e | 2376 | struct net_bridge_port_group *pg; |
0436862e NA |
2377 | |
2378 | for (pg = mlock_dereference(mp->ports, br); | |
2379 | pg; | |
2380 | pg = mlock_dereference(pg->next, br)) | |
2381 | if (br_port_group_equal(pg, p, src)) | |
2382 | return pg; | |
2383 | ||
2384 | return NULL; | |
2385 | } | |
2386 | ||
8ef2a9a5 YH |
2387 | static int br_ip4_multicast_igmp3_report(struct net_bridge *br, |
2388 | struct net_bridge_port *port, | |
06499098 VY |
2389 | struct sk_buff *skb, |
2390 | u16 vid) | |
eb1d1641 | 2391 | { |
0436862e NA |
2392 | bool igmpv2 = br->multicast_igmp_version == 2; |
2393 | struct net_bridge_mdb_entry *mdst; | |
2394 | struct net_bridge_port_group *pg; | |
6db6f0ea | 2395 | const unsigned char *src; |
eb1d1641 HX |
2396 | struct igmpv3_report *ih; |
2397 | struct igmpv3_grec *grec; | |
0436862e | 2398 | int i, len, num, type; |
54bea721 | 2399 | __be32 group, *h_addr; |
0436862e | 2400 | bool changed = false; |
0436862e | 2401 | int err = 0; |
e57f6185 | 2402 | u16 nsrcs; |
eb1d1641 | 2403 | |
eb1d1641 HX |
2404 | ih = igmpv3_report_hdr(skb); |
2405 | num = ntohs(ih->ngrec); | |
c2d4fbd2 | 2406 | len = skb_transport_offset(skb) + sizeof(*ih); |
eb1d1641 HX |
2407 | |
2408 | for (i = 0; i < num; i++) { | |
2409 | len += sizeof(*grec); | |
ba5ea614 | 2410 | if (!ip_mc_may_pull(skb, len)) |
eb1d1641 HX |
2411 | return -EINVAL; |
2412 | ||
fd218cf9 | 2413 | grec = (void *)(skb->data + len - sizeof(*grec)); |
eb1d1641 HX |
2414 | group = grec->grec_mca; |
2415 | type = grec->grec_type; | |
e57f6185 | 2416 | nsrcs = ntohs(grec->grec_nsrcs); |
eb1d1641 | 2417 | |
e57f6185 | 2418 | len += nsrcs * 4; |
ba5ea614 | 2419 | if (!ip_mc_may_pull(skb, len)) |
eb1d1641 HX |
2420 | return -EINVAL; |
2421 | ||
eb1d1641 HX |
2422 | switch (type) { |
2423 | case IGMPV3_MODE_IS_INCLUDE: | |
2424 | case IGMPV3_MODE_IS_EXCLUDE: | |
2425 | case IGMPV3_CHANGE_TO_INCLUDE: | |
2426 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
2427 | case IGMPV3_ALLOW_NEW_SOURCES: | |
2428 | case IGMPV3_BLOCK_OLD_SOURCES: | |
2429 | break; | |
2430 | ||
2431 | default: | |
2432 | continue; | |
2433 | } | |
2434 | ||
6db6f0ea | 2435 | src = eth_hdr(skb)->h_source; |
0436862e NA |
2436 | if (nsrcs == 0 && |
2437 | (type == IGMPV3_CHANGE_TO_INCLUDE || | |
2438 | type == IGMPV3_MODE_IS_INCLUDE)) { | |
2439 | if (!port || igmpv2) { | |
2440 | br_ip4_multicast_leave_group(br, port, group, vid, src); | |
2441 | continue; | |
2442 | } | |
bc8c20ac | 2443 | } else { |
6db6f0ea | 2444 | err = br_ip4_multicast_add_group(br, port, group, vid, |
0436862e | 2445 | src, igmpv2); |
bc8c20ac SA |
2446 | if (err) |
2447 | break; | |
2448 | } | |
0436862e NA |
2449 | |
2450 | if (!port || igmpv2) | |
2451 | continue; | |
2452 | ||
2453 | spin_lock_bh(&br->multicast_lock); | |
2454 | mdst = br_mdb_ip4_get(br, group, vid); | |
2455 | if (!mdst) | |
2456 | goto unlock_continue; | |
2457 | pg = br_multicast_find_port(mdst, port, src); | |
2458 | if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT)) | |
2459 | goto unlock_continue; | |
54bea721 | 2460 | /* reload grec and host addr */ |
0436862e | 2461 | grec = (void *)(skb->data + len - sizeof(*grec) - (nsrcs * 4)); |
54bea721 | 2462 | h_addr = &ip_hdr(skb)->saddr; |
0436862e NA |
2463 | switch (type) { |
2464 | case IGMPV3_ALLOW_NEW_SOURCES: | |
54bea721 | 2465 | changed = br_multicast_isinc_allow(pg, h_addr, grec->grec_src, |
474ddb37 | 2466 | nsrcs, sizeof(__be32), type); |
0436862e | 2467 | break; |
e6231bca | 2468 | case IGMPV3_MODE_IS_INCLUDE: |
54bea721 | 2469 | changed = br_multicast_isinc_allow(pg, h_addr, grec->grec_src, |
474ddb37 | 2470 | nsrcs, sizeof(__be32), type); |
e6231bca NA |
2471 | break; |
2472 | case IGMPV3_MODE_IS_EXCLUDE: | |
54bea721 | 2473 | changed = br_multicast_isexc(pg, h_addr, grec->grec_src, |
ddc255d9 | 2474 | nsrcs, sizeof(__be32), type); |
e6231bca | 2475 | break; |
5bf1e00b | 2476 | case IGMPV3_CHANGE_TO_INCLUDE: |
54bea721 | 2477 | changed = br_multicast_toin(pg, h_addr, grec->grec_src, |
ddc255d9 | 2478 | nsrcs, sizeof(__be32), type); |
5bf1e00b NA |
2479 | break; |
2480 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
54bea721 | 2481 | changed = br_multicast_toex(pg, h_addr, grec->grec_src, |
ddc255d9 | 2482 | nsrcs, sizeof(__be32), type); |
5bf1e00b | 2483 | break; |
109865fe | 2484 | case IGMPV3_BLOCK_OLD_SOURCES: |
54bea721 | 2485 | changed = br_multicast_block(pg, h_addr, grec->grec_src, |
474ddb37 | 2486 | nsrcs, sizeof(__be32), type); |
109865fe | 2487 | break; |
0436862e NA |
2488 | } |
2489 | if (changed) | |
2490 | br_mdb_notify(br->dev, mdst, pg, RTM_NEWMDB); | |
2491 | unlock_continue: | |
2492 | spin_unlock_bh(&br->multicast_lock); | |
eb1d1641 HX |
2493 | } |
2494 | ||
2495 | return err; | |
2496 | } | |
2497 | ||
dfd56b8b | 2498 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
2499 | static int br_ip6_multicast_mld2_report(struct net_bridge *br, |
2500 | struct net_bridge_port *port, | |
06499098 VY |
2501 | struct sk_buff *skb, |
2502 | u16 vid) | |
08b202b6 | 2503 | { |
0436862e NA |
2504 | bool mldv1 = br->multicast_mld_version == 1; |
2505 | struct net_bridge_mdb_entry *mdst; | |
2506 | struct net_bridge_port_group *pg; | |
ba5ea614 | 2507 | unsigned int nsrcs_offset; |
6db6f0ea | 2508 | const unsigned char *src; |
08b202b6 | 2509 | struct icmp6hdr *icmp6h; |
54bea721 | 2510 | struct in6_addr *h_addr; |
08b202b6 | 2511 | struct mld2_grec *grec; |
ba5ea614 | 2512 | unsigned int grec_len; |
0436862e NA |
2513 | bool changed = false; |
2514 | int i, len, num; | |
08b202b6 YH |
2515 | int err = 0; |
2516 | ||
ba5ea614 | 2517 | if (!ipv6_mc_may_pull(skb, sizeof(*icmp6h))) |
08b202b6 YH |
2518 | return -EINVAL; |
2519 | ||
2520 | icmp6h = icmp6_hdr(skb); | |
2521 | num = ntohs(icmp6h->icmp6_dataun.un_data16[1]); | |
c2d4fbd2 | 2522 | len = skb_transport_offset(skb) + sizeof(*icmp6h); |
08b202b6 YH |
2523 | |
2524 | for (i = 0; i < num; i++) { | |
e57f6185 NA |
2525 | __be16 *_nsrcs, __nsrcs; |
2526 | u16 nsrcs; | |
08b202b6 | 2527 | |
ba5ea614 LL |
2528 | nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs); |
2529 | ||
2530 | if (skb_transport_offset(skb) + ipv6_transport_len(skb) < | |
5fc6266a | 2531 | nsrcs_offset + sizeof(__nsrcs)) |
ba5ea614 LL |
2532 | return -EINVAL; |
2533 | ||
e57f6185 NA |
2534 | _nsrcs = skb_header_pointer(skb, nsrcs_offset, |
2535 | sizeof(__nsrcs), &__nsrcs); | |
2536 | if (!_nsrcs) | |
08b202b6 YH |
2537 | return -EINVAL; |
2538 | ||
e57f6185 NA |
2539 | nsrcs = ntohs(*_nsrcs); |
2540 | grec_len = struct_size(grec, grec_src, nsrcs); | |
ba5ea614 LL |
2541 | |
2542 | if (!ipv6_mc_may_pull(skb, len + grec_len)) | |
08b202b6 YH |
2543 | return -EINVAL; |
2544 | ||
2545 | grec = (struct mld2_grec *)(skb->data + len); | |
ba5ea614 | 2546 | len += grec_len; |
08b202b6 | 2547 | |
08b202b6 YH |
2548 | switch (grec->grec_type) { |
2549 | case MLD2_MODE_IS_INCLUDE: | |
2550 | case MLD2_MODE_IS_EXCLUDE: | |
2551 | case MLD2_CHANGE_TO_INCLUDE: | |
2552 | case MLD2_CHANGE_TO_EXCLUDE: | |
2553 | case MLD2_ALLOW_NEW_SOURCES: | |
2554 | case MLD2_BLOCK_OLD_SOURCES: | |
2555 | break; | |
2556 | ||
2557 | default: | |
2558 | continue; | |
2559 | } | |
2560 | ||
6db6f0ea | 2561 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
2562 | if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE || |
2563 | grec->grec_type == MLD2_MODE_IS_INCLUDE) && | |
e57f6185 | 2564 | nsrcs == 0) { |
0436862e NA |
2565 | if (!port || mldv1) { |
2566 | br_ip6_multicast_leave_group(br, port, | |
2567 | &grec->grec_mca, | |
2568 | vid, src); | |
2569 | continue; | |
2570 | } | |
bc8c20ac SA |
2571 | } else { |
2572 | err = br_ip6_multicast_add_group(br, port, | |
6db6f0ea | 2573 | &grec->grec_mca, vid, |
0436862e | 2574 | src, mldv1); |
9264251e | 2575 | if (err) |
bc8c20ac SA |
2576 | break; |
2577 | } | |
0436862e NA |
2578 | |
2579 | if (!port || mldv1) | |
2580 | continue; | |
2581 | ||
2582 | spin_lock_bh(&br->multicast_lock); | |
2583 | mdst = br_mdb_ip6_get(br, &grec->grec_mca, vid); | |
2584 | if (!mdst) | |
2585 | goto unlock_continue; | |
2586 | pg = br_multicast_find_port(mdst, port, src); | |
2587 | if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT)) | |
2588 | goto unlock_continue; | |
54bea721 | 2589 | h_addr = &ipv6_hdr(skb)->saddr; |
0436862e NA |
2590 | switch (grec->grec_type) { |
2591 | case MLD2_ALLOW_NEW_SOURCES: | |
54bea721 NA |
2592 | changed = br_multicast_isinc_allow(pg, h_addr, |
2593 | grec->grec_src, nsrcs, | |
474ddb37 NA |
2594 | sizeof(struct in6_addr), |
2595 | grec->grec_type); | |
0436862e | 2596 | break; |
e6231bca | 2597 | case MLD2_MODE_IS_INCLUDE: |
54bea721 NA |
2598 | changed = br_multicast_isinc_allow(pg, h_addr, |
2599 | grec->grec_src, nsrcs, | |
474ddb37 NA |
2600 | sizeof(struct in6_addr), |
2601 | grec->grec_type); | |
e6231bca NA |
2602 | break; |
2603 | case MLD2_MODE_IS_EXCLUDE: | |
54bea721 NA |
2604 | changed = br_multicast_isexc(pg, h_addr, |
2605 | grec->grec_src, nsrcs, | |
ddc255d9 NA |
2606 | sizeof(struct in6_addr), |
2607 | grec->grec_type); | |
e6231bca | 2608 | break; |
5bf1e00b | 2609 | case MLD2_CHANGE_TO_INCLUDE: |
54bea721 NA |
2610 | changed = br_multicast_toin(pg, h_addr, |
2611 | grec->grec_src, nsrcs, | |
ddc255d9 NA |
2612 | sizeof(struct in6_addr), |
2613 | grec->grec_type); | |
5bf1e00b NA |
2614 | break; |
2615 | case MLD2_CHANGE_TO_EXCLUDE: | |
54bea721 NA |
2616 | changed = br_multicast_toex(pg, h_addr, |
2617 | grec->grec_src, nsrcs, | |
ddc255d9 NA |
2618 | sizeof(struct in6_addr), |
2619 | grec->grec_type); | |
5bf1e00b | 2620 | break; |
109865fe | 2621 | case MLD2_BLOCK_OLD_SOURCES: |
54bea721 NA |
2622 | changed = br_multicast_block(pg, h_addr, |
2623 | grec->grec_src, nsrcs, | |
474ddb37 NA |
2624 | sizeof(struct in6_addr), |
2625 | grec->grec_type); | |
109865fe | 2626 | break; |
0436862e NA |
2627 | } |
2628 | if (changed) | |
2629 | br_mdb_notify(br->dev, mdst, pg, RTM_NEWMDB); | |
2630 | unlock_continue: | |
2631 | spin_unlock_bh(&br->multicast_lock); | |
08b202b6 YH |
2632 | } |
2633 | ||
2634 | return err; | |
2635 | } | |
2636 | #endif | |
2637 | ||
dc4eb53a | 2638 | static bool br_ip4_multicast_select_querier(struct net_bridge *br, |
2cd41431 | 2639 | struct net_bridge_port *port, |
dc4eb53a LL |
2640 | __be32 saddr) |
2641 | { | |
2642 | if (!timer_pending(&br->ip4_own_query.timer) && | |
2643 | !timer_pending(&br->ip4_other_query.timer)) | |
2644 | goto update; | |
2645 | ||
deb96566 | 2646 | if (!br->ip4_querier.addr.src.ip4) |
dc4eb53a LL |
2647 | goto update; |
2648 | ||
deb96566 | 2649 | if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.src.ip4)) |
dc4eb53a LL |
2650 | goto update; |
2651 | ||
2652 | return false; | |
2653 | ||
2654 | update: | |
deb96566 | 2655 | br->ip4_querier.addr.src.ip4 = saddr; |
dc4eb53a | 2656 | |
2cd41431 LL |
2657 | /* update protected by general multicast_lock by caller */ |
2658 | rcu_assign_pointer(br->ip4_querier.port, port); | |
2659 | ||
dc4eb53a LL |
2660 | return true; |
2661 | } | |
2662 | ||
2663 | #if IS_ENABLED(CONFIG_IPV6) | |
2664 | static bool br_ip6_multicast_select_querier(struct net_bridge *br, | |
2cd41431 | 2665 | struct net_bridge_port *port, |
dc4eb53a LL |
2666 | struct in6_addr *saddr) |
2667 | { | |
2668 | if (!timer_pending(&br->ip6_own_query.timer) && | |
2669 | !timer_pending(&br->ip6_other_query.timer)) | |
2670 | goto update; | |
2671 | ||
deb96566 | 2672 | if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.src.ip6) <= 0) |
dc4eb53a LL |
2673 | goto update; |
2674 | ||
2675 | return false; | |
2676 | ||
2677 | update: | |
deb96566 | 2678 | br->ip6_querier.addr.src.ip6 = *saddr; |
dc4eb53a | 2679 | |
2cd41431 LL |
2680 | /* update protected by general multicast_lock by caller */ |
2681 | rcu_assign_pointer(br->ip6_querier.port, port); | |
2682 | ||
dc4eb53a LL |
2683 | return true; |
2684 | } | |
2685 | #endif | |
2686 | ||
cc0fdd80 | 2687 | static void |
90010b36 LL |
2688 | br_multicast_update_query_timer(struct net_bridge *br, |
2689 | struct bridge_mcast_other_query *query, | |
2690 | unsigned long max_delay) | |
b00589af | 2691 | { |
90010b36 LL |
2692 | if (!timer_pending(&query->timer)) |
2693 | query->delay_time = jiffies + max_delay; | |
b00589af | 2694 | |
90010b36 | 2695 | mod_timer(&query->timer, jiffies + br->multicast_querier_interval); |
b00589af LL |
2696 | } |
2697 | ||
6d549648 NF |
2698 | static void br_port_mc_router_state_change(struct net_bridge_port *p, |
2699 | bool is_mc_router) | |
2700 | { | |
2701 | struct switchdev_attr attr = { | |
2702 | .orig_dev = p->dev, | |
2703 | .id = SWITCHDEV_ATTR_ID_PORT_MROUTER, | |
2704 | .flags = SWITCHDEV_F_DEFER, | |
2705 | .u.mrouter = is_mc_router, | |
2706 | }; | |
2707 | ||
dcbdf135 | 2708 | switchdev_port_attr_set(p->dev, &attr, NULL); |
6d549648 NF |
2709 | } |
2710 | ||
d9b8c4d8 LL |
2711 | static struct net_bridge_port * |
2712 | br_multicast_rport_from_node(struct net_bridge *br, | |
2713 | struct hlist_head *mc_router_list, | |
2714 | struct hlist_node *rlist) | |
2715 | { | |
a3c02e76 LL |
2716 | #if IS_ENABLED(CONFIG_IPV6) |
2717 | if (mc_router_list == &br->ip6_mc_router_list) | |
2718 | return hlist_entry(rlist, struct net_bridge_port, ip6_rlist); | |
2719 | #endif | |
d9b8c4d8 LL |
2720 | return hlist_entry(rlist, struct net_bridge_port, ip4_rlist); |
2721 | } | |
2722 | ||
2723 | static struct hlist_node * | |
2724 | br_multicast_get_rport_slot(struct net_bridge *br, | |
2725 | struct net_bridge_port *port, | |
2726 | struct hlist_head *mc_router_list) | |
2727 | ||
2728 | { | |
2729 | struct hlist_node *slot = NULL; | |
2730 | struct net_bridge_port *p; | |
2731 | struct hlist_node *rlist; | |
2732 | ||
2733 | hlist_for_each(rlist, mc_router_list) { | |
2734 | p = br_multicast_rport_from_node(br, mc_router_list, rlist); | |
2735 | ||
2736 | if ((unsigned long)port >= (unsigned long)p) | |
2737 | break; | |
2738 | ||
2739 | slot = rlist; | |
2740 | } | |
2741 | ||
2742 | return slot; | |
2743 | } | |
2744 | ||
a3c02e76 LL |
2745 | static bool br_multicast_no_router_otherpf(struct net_bridge_port *port, |
2746 | struct hlist_node *rnode) | |
2747 | { | |
2748 | #if IS_ENABLED(CONFIG_IPV6) | |
2749 | if (rnode != &port->ip6_rlist) | |
2750 | return hlist_unhashed(&port->ip6_rlist); | |
2751 | else | |
2752 | return hlist_unhashed(&port->ip4_rlist); | |
2753 | #else | |
2754 | return true; | |
2755 | #endif | |
2756 | } | |
2757 | ||
d9b8c4d8 | 2758 | /* Add port to router_list |
7e80c124 | 2759 | * list is maintained ordered by pointer value |
2760 | * and locked by br->multicast_lock and RCU | |
2761 | */ | |
0909e117 | 2762 | static void br_multicast_add_router(struct net_bridge *br, |
d9b8c4d8 LL |
2763 | struct net_bridge_port *port, |
2764 | struct hlist_node *rlist, | |
2765 | struct hlist_head *mc_router_list) | |
0909e117 | 2766 | { |
d9b8c4d8 | 2767 | struct hlist_node *slot; |
dcdca2c4 | 2768 | |
d9b8c4d8 | 2769 | if (!hlist_unhashed(rlist)) |
1a040eac NA |
2770 | return; |
2771 | ||
d9b8c4d8 | 2772 | slot = br_multicast_get_rport_slot(br, port, mc_router_list); |
dcdca2c4 | 2773 | |
7e80c124 | 2774 | if (slot) |
d9b8c4d8 | 2775 | hlist_add_behind_rcu(rlist, slot); |
dcdca2c4 | 2776 | else |
d9b8c4d8 LL |
2777 | hlist_add_head_rcu(rlist, mc_router_list); |
2778 | ||
a3c02e76 LL |
2779 | /* For backwards compatibility for now, only notify if we |
2780 | * switched from no IPv4/IPv6 multicast router to a new | |
2781 | * IPv4 or IPv6 multicast router. | |
2782 | */ | |
2783 | if (br_multicast_no_router_otherpf(port, rlist)) { | |
2784 | br_rtr_notify(br->dev, port, RTM_NEWMDB); | |
2785 | br_port_mc_router_state_change(port, true); | |
2786 | } | |
0909e117 HX |
2787 | } |
2788 | ||
d9b8c4d8 LL |
2789 | /* Add port to router_list |
2790 | * list is maintained ordered by pointer value | |
2791 | * and locked by br->multicast_lock and RCU | |
2792 | */ | |
2793 | static void br_ip4_multicast_add_router(struct net_bridge *br, | |
2794 | struct net_bridge_port *port) | |
2795 | { | |
2796 | br_multicast_add_router(br, port, &port->ip4_rlist, | |
2797 | &br->ip4_mc_router_list); | |
2798 | } | |
2799 | ||
a3c02e76 LL |
2800 | /* Add port to router_list |
2801 | * list is maintained ordered by pointer value | |
2802 | * and locked by br->multicast_lock and RCU | |
2803 | */ | |
2804 | static void br_ip6_multicast_add_router(struct net_bridge *br, | |
2805 | struct net_bridge_port *port) | |
2806 | { | |
2807 | #if IS_ENABLED(CONFIG_IPV6) | |
2808 | br_multicast_add_router(br, port, &port->ip6_rlist, | |
2809 | &br->ip6_mc_router_list); | |
2810 | #endif | |
2811 | } | |
2812 | ||
eb1d1641 | 2813 | static void br_multicast_mark_router(struct net_bridge *br, |
d9b8c4d8 LL |
2814 | struct net_bridge_port *port, |
2815 | struct timer_list *timer, | |
2816 | struct hlist_node *rlist, | |
2817 | struct hlist_head *mc_router_list) | |
eb1d1641 HX |
2818 | { |
2819 | unsigned long now = jiffies; | |
eb1d1641 HX |
2820 | |
2821 | if (!port) { | |
77041420 | 2822 | if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) { |
d9b8c4d8 LL |
2823 | if (!br_ip4_multicast_is_router(br) && |
2824 | !br_ip6_multicast_is_router(br)) | |
77041420 | 2825 | br_mc_router_state_change(br, true); |
d9b8c4d8 | 2826 | mod_timer(timer, now + br->multicast_querier_interval); |
77041420 | 2827 | } |
eb1d1641 HX |
2828 | return; |
2829 | } | |
2830 | ||
a55d8246 NA |
2831 | if (port->multicast_router == MDB_RTR_TYPE_DISABLED || |
2832 | port->multicast_router == MDB_RTR_TYPE_PERM) | |
eb1d1641 HX |
2833 | return; |
2834 | ||
d9b8c4d8 LL |
2835 | br_multicast_add_router(br, port, rlist, mc_router_list); |
2836 | mod_timer(timer, now + br->multicast_querier_interval); | |
2837 | } | |
2838 | ||
2839 | static void br_ip4_multicast_mark_router(struct net_bridge *br, | |
2840 | struct net_bridge_port *port) | |
2841 | { | |
2842 | struct timer_list *timer = &br->ip4_mc_router_timer; | |
2843 | struct hlist_node *rlist = NULL; | |
2844 | ||
2845 | if (port) { | |
2846 | timer = &port->ip4_mc_router_timer; | |
2847 | rlist = &port->ip4_rlist; | |
2848 | } | |
eb1d1641 | 2849 | |
d9b8c4d8 LL |
2850 | br_multicast_mark_router(br, port, timer, rlist, |
2851 | &br->ip4_mc_router_list); | |
eb1d1641 HX |
2852 | } |
2853 | ||
a3c02e76 LL |
2854 | static void br_ip6_multicast_mark_router(struct net_bridge *br, |
2855 | struct net_bridge_port *port) | |
2856 | { | |
2857 | #if IS_ENABLED(CONFIG_IPV6) | |
2858 | struct timer_list *timer = &br->ip6_mc_router_timer; | |
2859 | struct hlist_node *rlist = NULL; | |
2860 | ||
2861 | if (port) { | |
2862 | timer = &port->ip6_mc_router_timer; | |
2863 | rlist = &port->ip6_rlist; | |
2864 | } | |
2865 | ||
2866 | br_multicast_mark_router(br, port, timer, rlist, | |
2867 | &br->ip6_mc_router_list); | |
2868 | #endif | |
2869 | } | |
2870 | ||
b19232ef LL |
2871 | static void |
2872 | br_ip4_multicast_query_received(struct net_bridge *br, | |
2873 | struct net_bridge_port *port, | |
2874 | struct bridge_mcast_other_query *query, | |
2875 | struct br_ip *saddr, | |
2876 | unsigned long max_delay) | |
2877 | { | |
2878 | if (!br_ip4_multicast_select_querier(br, port, saddr->src.ip4)) | |
2879 | return; | |
2880 | ||
2881 | br_multicast_update_query_timer(br, query, max_delay); | |
d9b8c4d8 | 2882 | br_ip4_multicast_mark_router(br, port); |
b19232ef LL |
2883 | } |
2884 | ||
2885 | #if IS_ENABLED(CONFIG_IPV6) | |
2886 | static void | |
2887 | br_ip6_multicast_query_received(struct net_bridge *br, | |
2888 | struct net_bridge_port *port, | |
2889 | struct bridge_mcast_other_query *query, | |
2890 | struct br_ip *saddr, | |
2891 | unsigned long max_delay) | |
eb1d1641 | 2892 | { |
b19232ef | 2893 | if (!br_ip6_multicast_select_querier(br, port, &saddr->src.ip6)) |
eb1d1641 HX |
2894 | return; |
2895 | ||
dc4eb53a | 2896 | br_multicast_update_query_timer(br, query, max_delay); |
a3c02e76 | 2897 | br_ip6_multicast_mark_router(br, port); |
eb1d1641 | 2898 | } |
b19232ef | 2899 | #endif |
eb1d1641 | 2900 | |
9c2e955c | 2901 | static void br_ip4_multicast_query(struct net_bridge *br, |
2902 | struct net_bridge_port *port, | |
2903 | struct sk_buff *skb, | |
2904 | u16 vid) | |
eb1d1641 | 2905 | { |
ba5ea614 | 2906 | unsigned int transport_len = ip_transport_len(skb); |
b71d1d42 | 2907 | const struct iphdr *iph = ip_hdr(skb); |
eb1d1641 HX |
2908 | struct igmphdr *ih = igmp_hdr(skb); |
2909 | struct net_bridge_mdb_entry *mp; | |
2910 | struct igmpv3_query *ih3; | |
2911 | struct net_bridge_port_group *p; | |
e8051688 | 2912 | struct net_bridge_port_group __rcu **pp; |
dc4eb53a | 2913 | struct br_ip saddr; |
eb1d1641 HX |
2914 | unsigned long max_delay; |
2915 | unsigned long now = jiffies; | |
2916 | __be32 group; | |
2917 | ||
2918 | spin_lock(&br->multicast_lock); | |
2919 | if (!netif_running(br->dev) || | |
2920 | (port && port->state == BR_STATE_DISABLED)) | |
2921 | goto out; | |
2922 | ||
eb1d1641 HX |
2923 | group = ih->group; |
2924 | ||
ba5ea614 | 2925 | if (transport_len == sizeof(*ih)) { |
eb1d1641 HX |
2926 | max_delay = ih->code * (HZ / IGMP_TIMER_SCALE); |
2927 | ||
2928 | if (!max_delay) { | |
2929 | max_delay = 10 * HZ; | |
2930 | group = 0; | |
2931 | } | |
ba5ea614 | 2932 | } else if (transport_len >= sizeof(*ih3)) { |
eb1d1641 | 2933 | ih3 = igmpv3_query_hdr(skb); |
23550b83 NA |
2934 | if (ih3->nsrcs || |
2935 | (br->multicast_igmp_version == 3 && group && ih3->suppress)) | |
bec68ff1 | 2936 | goto out; |
eb1d1641 | 2937 | |
0ba8c9ec YH |
2938 | max_delay = ih3->code ? |
2939 | IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1; | |
9afd85c9 | 2940 | } else { |
9ed973cc LL |
2941 | goto out; |
2942 | } | |
2943 | ||
dc4eb53a LL |
2944 | if (!group) { |
2945 | saddr.proto = htons(ETH_P_IP); | |
deb96566 | 2946 | saddr.src.ip4 = iph->saddr; |
b00589af | 2947 | |
b19232ef LL |
2948 | br_ip4_multicast_query_received(br, port, &br->ip4_other_query, |
2949 | &saddr, max_delay); | |
eb1d1641 | 2950 | goto out; |
dc4eb53a | 2951 | } |
eb1d1641 | 2952 | |
19e3a9c9 | 2953 | mp = br_mdb_ip4_get(br, group, vid); |
eb1d1641 HX |
2954 | if (!mp) |
2955 | goto out; | |
2956 | ||
2957 | max_delay *= br->multicast_last_member_count; | |
2958 | ||
ff0fd34e | 2959 | if (mp->host_joined && |
eb1d1641 HX |
2960 | (timer_pending(&mp->timer) ? |
2961 | time_after(mp->timer.expires, now + max_delay) : | |
2962 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
2963 | mod_timer(&mp->timer, now + max_delay); | |
2964 | ||
e8051688 ED |
2965 | for (pp = &mp->ports; |
2966 | (p = mlock_dereference(*pp, br)) != NULL; | |
2967 | pp = &p->next) { | |
eb1d1641 HX |
2968 | if (timer_pending(&p->timer) ? |
2969 | time_after(p->timer.expires, now + max_delay) : | |
23550b83 NA |
2970 | try_to_del_timer_sync(&p->timer) >= 0 && |
2971 | (br->multicast_igmp_version == 2 || | |
2972 | p->filter_mode == MCAST_EXCLUDE)) | |
24f9cdcb | 2973 | mod_timer(&p->timer, now + max_delay); |
eb1d1641 HX |
2974 | } |
2975 | ||
2976 | out: | |
2977 | spin_unlock(&br->multicast_lock); | |
eb1d1641 HX |
2978 | } |
2979 | ||
dfd56b8b | 2980 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
2981 | static int br_ip6_multicast_query(struct net_bridge *br, |
2982 | struct net_bridge_port *port, | |
06499098 VY |
2983 | struct sk_buff *skb, |
2984 | u16 vid) | |
08b202b6 | 2985 | { |
ba5ea614 | 2986 | unsigned int transport_len = ipv6_transport_len(skb); |
eca2a43b | 2987 | struct mld_msg *mld; |
08b202b6 YH |
2988 | struct net_bridge_mdb_entry *mp; |
2989 | struct mld2_query *mld2q; | |
e8051688 ED |
2990 | struct net_bridge_port_group *p; |
2991 | struct net_bridge_port_group __rcu **pp; | |
dc4eb53a | 2992 | struct br_ip saddr; |
08b202b6 YH |
2993 | unsigned long max_delay; |
2994 | unsigned long now = jiffies; | |
856ce5d0 | 2995 | unsigned int offset = skb_transport_offset(skb); |
b71d1d42 | 2996 | const struct in6_addr *group = NULL; |
9ed973cc | 2997 | bool is_general_query; |
08b202b6 YH |
2998 | int err = 0; |
2999 | ||
3000 | spin_lock(&br->multicast_lock); | |
3001 | if (!netif_running(br->dev) || | |
3002 | (port && port->state == BR_STATE_DISABLED)) | |
3003 | goto out; | |
3004 | ||
ba5ea614 | 3005 | if (transport_len == sizeof(*mld)) { |
856ce5d0 | 3006 | if (!pskb_may_pull(skb, offset + sizeof(*mld))) { |
08b202b6 YH |
3007 | err = -EINVAL; |
3008 | goto out; | |
3009 | } | |
3010 | mld = (struct mld_msg *) icmp6_hdr(skb); | |
4715213d | 3011 | max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay)); |
08b202b6 YH |
3012 | if (max_delay) |
3013 | group = &mld->mld_mca; | |
248ba8ec | 3014 | } else { |
856ce5d0 | 3015 | if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) { |
08b202b6 YH |
3016 | err = -EINVAL; |
3017 | goto out; | |
3018 | } | |
3019 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
3020 | if (!mld2q->mld2q_nsrcs) | |
3021 | group = &mld2q->mld2q_mca; | |
23550b83 NA |
3022 | if (br->multicast_mld_version == 2 && |
3023 | !ipv6_addr_any(&mld2q->mld2q_mca) && | |
3024 | mld2q->mld2q_suppress) | |
3025 | goto out; | |
e3f5b170 DB |
3026 | |
3027 | max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL); | |
08b202b6 YH |
3028 | } |
3029 | ||
9ed973cc LL |
3030 | is_general_query = group && ipv6_addr_any(group); |
3031 | ||
dc4eb53a LL |
3032 | if (is_general_query) { |
3033 | saddr.proto = htons(ETH_P_IPV6); | |
deb96566 | 3034 | saddr.src.ip6 = ipv6_hdr(skb)->saddr; |
b00589af | 3035 | |
b19232ef LL |
3036 | br_ip6_multicast_query_received(br, port, &br->ip6_other_query, |
3037 | &saddr, max_delay); | |
08b202b6 | 3038 | goto out; |
6c03ee8b LL |
3039 | } else if (!group) { |
3040 | goto out; | |
dc4eb53a | 3041 | } |
08b202b6 | 3042 | |
19e3a9c9 | 3043 | mp = br_mdb_ip6_get(br, group, vid); |
08b202b6 YH |
3044 | if (!mp) |
3045 | goto out; | |
3046 | ||
3047 | max_delay *= br->multicast_last_member_count; | |
ff0fd34e | 3048 | if (mp->host_joined && |
08b202b6 YH |
3049 | (timer_pending(&mp->timer) ? |
3050 | time_after(mp->timer.expires, now + max_delay) : | |
3051 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
3052 | mod_timer(&mp->timer, now + max_delay); | |
3053 | ||
e8051688 ED |
3054 | for (pp = &mp->ports; |
3055 | (p = mlock_dereference(*pp, br)) != NULL; | |
3056 | pp = &p->next) { | |
08b202b6 YH |
3057 | if (timer_pending(&p->timer) ? |
3058 | time_after(p->timer.expires, now + max_delay) : | |
23550b83 NA |
3059 | try_to_del_timer_sync(&p->timer) >= 0 && |
3060 | (br->multicast_mld_version == 1 || | |
3061 | p->filter_mode == MCAST_EXCLUDE)) | |
24f9cdcb | 3062 | mod_timer(&p->timer, now + max_delay); |
08b202b6 YH |
3063 | } |
3064 | ||
3065 | out: | |
3066 | spin_unlock(&br->multicast_lock); | |
3067 | return err; | |
3068 | } | |
3069 | #endif | |
3070 | ||
90010b36 LL |
3071 | static void |
3072 | br_multicast_leave_group(struct net_bridge *br, | |
3073 | struct net_bridge_port *port, | |
3074 | struct br_ip *group, | |
3075 | struct bridge_mcast_other_query *other_query, | |
6db6f0ea FF |
3076 | struct bridge_mcast_own_query *own_query, |
3077 | const unsigned char *src) | |
eb1d1641 | 3078 | { |
eb1d1641 HX |
3079 | struct net_bridge_mdb_entry *mp; |
3080 | struct net_bridge_port_group *p; | |
3081 | unsigned long now; | |
3082 | unsigned long time; | |
3083 | ||
eb1d1641 HX |
3084 | spin_lock(&br->multicast_lock); |
3085 | if (!netif_running(br->dev) || | |
544586f7 | 3086 | (port && port->state == BR_STATE_DISABLED)) |
eb1d1641 HX |
3087 | goto out; |
3088 | ||
19e3a9c9 | 3089 | mp = br_mdb_ip_get(br, group); |
eb1d1641 HX |
3090 | if (!mp) |
3091 | goto out; | |
3092 | ||
544586f7 SA |
3093 | if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) { |
3094 | struct net_bridge_port_group __rcu **pp; | |
3095 | ||
3096 | for (pp = &mp->ports; | |
3097 | (p = mlock_dereference(*pp, br)) != NULL; | |
3098 | pp = &p->next) { | |
6db6f0ea | 3099 | if (!br_port_group_equal(p, port, src)) |
544586f7 SA |
3100 | continue; |
3101 | ||
5c725b6b NA |
3102 | if (p->flags & MDB_PG_FLAGS_PERMANENT) |
3103 | break; | |
3104 | ||
681590bd NA |
3105 | p->flags |= MDB_PG_FLAGS_FAST_LEAVE; |
3106 | br_multicast_del_pg(mp, p, pp); | |
544586f7 SA |
3107 | } |
3108 | goto out; | |
3109 | } | |
3110 | ||
3111 | if (timer_pending(&other_query->timer)) | |
3112 | goto out; | |
3113 | ||
675779ad | 3114 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { |
438ef2d0 | 3115 | __br_multicast_send_query(br, port, NULL, NULL, &mp->addr, |
42c11ccf | 3116 | false, 0, NULL); |
6b7df111 CW |
3117 | |
3118 | time = jiffies + br->multicast_last_member_count * | |
3119 | br->multicast_last_member_interval; | |
cc0fdd80 | 3120 | |
90010b36 | 3121 | mod_timer(&own_query->timer, time); |
6b7df111 CW |
3122 | |
3123 | for (p = mlock_dereference(mp->ports, br); | |
3124 | p != NULL; | |
3125 | p = mlock_dereference(p->next, br)) { | |
6db6f0ea | 3126 | if (!br_port_group_equal(p, port, src)) |
6b7df111 CW |
3127 | continue; |
3128 | ||
3129 | if (!hlist_unhashed(&p->mglist) && | |
3130 | (timer_pending(&p->timer) ? | |
3131 | time_after(p->timer.expires, time) : | |
3132 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
3133 | mod_timer(&p->timer, time); | |
3134 | } | |
3135 | ||
3136 | break; | |
3137 | } | |
3138 | } | |
3139 | ||
eb1d1641 HX |
3140 | now = jiffies; |
3141 | time = now + br->multicast_last_member_count * | |
3142 | br->multicast_last_member_interval; | |
3143 | ||
3144 | if (!port) { | |
ff0fd34e | 3145 | if (mp->host_joined && |
eb1d1641 HX |
3146 | (timer_pending(&mp->timer) ? |
3147 | time_after(mp->timer.expires, time) : | |
3148 | try_to_del_timer_sync(&mp->timer) >= 0)) { | |
3149 | mod_timer(&mp->timer, time); | |
eb1d1641 | 3150 | } |
454594f3 LL |
3151 | |
3152 | goto out; | |
3153 | } | |
3154 | ||
3155 | for (p = mlock_dereference(mp->ports, br); | |
3156 | p != NULL; | |
3157 | p = mlock_dereference(p->next, br)) { | |
085b53c8 | 3158 | if (p->key.port != port) |
454594f3 LL |
3159 | continue; |
3160 | ||
3161 | if (!hlist_unhashed(&p->mglist) && | |
3162 | (timer_pending(&p->timer) ? | |
3163 | time_after(p->timer.expires, time) : | |
3164 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
3165 | mod_timer(&p->timer, time); | |
3166 | } | |
3167 | ||
3168 | break; | |
eb1d1641 | 3169 | } |
eb1d1641 HX |
3170 | out: |
3171 | spin_unlock(&br->multicast_lock); | |
3172 | } | |
3173 | ||
8ef2a9a5 YH |
3174 | static void br_ip4_multicast_leave_group(struct net_bridge *br, |
3175 | struct net_bridge_port *port, | |
b0e9a30d | 3176 | __be32 group, |
6db6f0ea FF |
3177 | __u16 vid, |
3178 | const unsigned char *src) | |
8ef2a9a5 YH |
3179 | { |
3180 | struct br_ip br_group; | |
90010b36 | 3181 | struct bridge_mcast_own_query *own_query; |
8ef2a9a5 YH |
3182 | |
3183 | if (ipv4_is_local_multicast(group)) | |
3184 | return; | |
3185 | ||
90010b36 LL |
3186 | own_query = port ? &port->ip4_own_query : &br->ip4_own_query; |
3187 | ||
1515a63f | 3188 | memset(&br_group, 0, sizeof(br_group)); |
eab3227b | 3189 | br_group.dst.ip4 = group; |
8ef2a9a5 | 3190 | br_group.proto = htons(ETH_P_IP); |
b0e9a30d | 3191 | br_group.vid = vid; |
8ef2a9a5 | 3192 | |
90010b36 | 3193 | br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query, |
6db6f0ea | 3194 | own_query, src); |
8ef2a9a5 YH |
3195 | } |
3196 | ||
dfd56b8b | 3197 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 YH |
3198 | static void br_ip6_multicast_leave_group(struct net_bridge *br, |
3199 | struct net_bridge_port *port, | |
b0e9a30d | 3200 | const struct in6_addr *group, |
6db6f0ea FF |
3201 | __u16 vid, |
3202 | const unsigned char *src) | |
08b202b6 YH |
3203 | { |
3204 | struct br_ip br_group; | |
90010b36 | 3205 | struct bridge_mcast_own_query *own_query; |
08b202b6 | 3206 | |
3c3769e6 | 3207 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
3208 | return; |
3209 | ||
90010b36 LL |
3210 | own_query = port ? &port->ip6_own_query : &br->ip6_own_query; |
3211 | ||
1515a63f | 3212 | memset(&br_group, 0, sizeof(br_group)); |
eab3227b | 3213 | br_group.dst.ip6 = *group; |
08b202b6 | 3214 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 3215 | br_group.vid = vid; |
08b202b6 | 3216 | |
90010b36 | 3217 | br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query, |
6db6f0ea | 3218 | own_query, src); |
08b202b6 YH |
3219 | } |
3220 | #endif | |
8ef2a9a5 | 3221 | |
1080ab95 NA |
3222 | static void br_multicast_err_count(const struct net_bridge *br, |
3223 | const struct net_bridge_port *p, | |
3224 | __be16 proto) | |
3225 | { | |
3226 | struct bridge_mcast_stats __percpu *stats; | |
3227 | struct bridge_mcast_stats *pstats; | |
3228 | ||
675779ad | 3229 | if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) |
1080ab95 NA |
3230 | return; |
3231 | ||
3232 | if (p) | |
3233 | stats = p->mcast_stats; | |
3234 | else | |
3235 | stats = br->mcast_stats; | |
3236 | if (WARN_ON(!stats)) | |
3237 | return; | |
3238 | ||
3239 | pstats = this_cpu_ptr(stats); | |
3240 | ||
3241 | u64_stats_update_begin(&pstats->syncp); | |
3242 | switch (proto) { | |
3243 | case htons(ETH_P_IP): | |
3244 | pstats->mstats.igmp_parse_errors++; | |
3245 | break; | |
3246 | #if IS_ENABLED(CONFIG_IPV6) | |
3247 | case htons(ETH_P_IPV6): | |
3248 | pstats->mstats.mld_parse_errors++; | |
3249 | break; | |
3250 | #endif | |
3251 | } | |
3252 | u64_stats_update_end(&pstats->syncp); | |
3253 | } | |
3254 | ||
91b02d3d NA |
3255 | static void br_multicast_pim(struct net_bridge *br, |
3256 | struct net_bridge_port *port, | |
3257 | const struct sk_buff *skb) | |
3258 | { | |
3259 | unsigned int offset = skb_transport_offset(skb); | |
3260 | struct pimhdr *pimhdr, _pimhdr; | |
3261 | ||
3262 | pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr); | |
3263 | if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION || | |
3264 | pim_hdr_type(pimhdr) != PIM_TYPE_HELLO) | |
3265 | return; | |
3266 | ||
04bef83a | 3267 | spin_lock(&br->multicast_lock); |
d9b8c4d8 | 3268 | br_ip4_multicast_mark_router(br, port); |
04bef83a | 3269 | spin_unlock(&br->multicast_lock); |
91b02d3d NA |
3270 | } |
3271 | ||
4b3087c7 LL |
3272 | static int br_ip4_multicast_mrd_rcv(struct net_bridge *br, |
3273 | struct net_bridge_port *port, | |
3274 | struct sk_buff *skb) | |
3275 | { | |
3276 | if (ip_hdr(skb)->protocol != IPPROTO_IGMP || | |
3277 | igmp_hdr(skb)->type != IGMP_MRDISC_ADV) | |
3278 | return -ENOMSG; | |
3279 | ||
000b7287 | 3280 | spin_lock(&br->multicast_lock); |
d9b8c4d8 | 3281 | br_ip4_multicast_mark_router(br, port); |
000b7287 | 3282 | spin_unlock(&br->multicast_lock); |
4b3087c7 LL |
3283 | |
3284 | return 0; | |
3285 | } | |
3286 | ||
eb1d1641 HX |
3287 | static int br_multicast_ipv4_rcv(struct net_bridge *br, |
3288 | struct net_bridge_port *port, | |
06499098 VY |
3289 | struct sk_buff *skb, |
3290 | u16 vid) | |
eb1d1641 | 3291 | { |
6db6f0ea | 3292 | const unsigned char *src; |
eb1d1641 | 3293 | struct igmphdr *ih; |
eb1d1641 HX |
3294 | int err; |
3295 | ||
ba5ea614 | 3296 | err = ip_mc_check_igmp(skb); |
eb1d1641 | 3297 | |
9afd85c9 | 3298 | if (err == -ENOMSG) { |
91b02d3d | 3299 | if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) { |
bd4265fe | 3300 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
91b02d3d NA |
3301 | } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) { |
3302 | if (ip_hdr(skb)->protocol == IPPROTO_PIM) | |
3303 | br_multicast_pim(br, port, skb); | |
4b3087c7 | 3304 | } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) { |
08e71623 | 3305 | br_ip4_multicast_mrd_rcv(br, port, skb); |
91b02d3d | 3306 | } |
4b3087c7 | 3307 | |
eb1d1641 | 3308 | return 0; |
9afd85c9 | 3309 | } else if (err < 0) { |
1080ab95 | 3310 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 3311 | return err; |
bd4265fe | 3312 | } |
eb1d1641 | 3313 | |
9afd85c9 | 3314 | ih = igmp_hdr(skb); |
6db6f0ea | 3315 | src = eth_hdr(skb)->h_source; |
1080ab95 | 3316 | BR_INPUT_SKB_CB(skb)->igmp = ih->type; |
eb1d1641 HX |
3317 | |
3318 | switch (ih->type) { | |
3319 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
3320 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
62b2bcb4 | 3321 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
8b671779 NA |
3322 | err = br_ip4_multicast_add_group(br, port, ih->group, vid, src, |
3323 | true); | |
eb1d1641 HX |
3324 | break; |
3325 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
ba5ea614 | 3326 | err = br_ip4_multicast_igmp3_report(br, port, skb, vid); |
eb1d1641 HX |
3327 | break; |
3328 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
ba5ea614 | 3329 | br_ip4_multicast_query(br, port, skb, vid); |
eb1d1641 HX |
3330 | break; |
3331 | case IGMP_HOST_LEAVE_MESSAGE: | |
6db6f0ea | 3332 | br_ip4_multicast_leave_group(br, port, ih->group, vid, src); |
eb1d1641 HX |
3333 | break; |
3334 | } | |
3335 | ||
a65056ec | 3336 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
3337 | BR_MCAST_DIR_RX); |
3338 | ||
eb1d1641 HX |
3339 | return err; |
3340 | } | |
3341 | ||
dfd56b8b | 3342 | #if IS_ENABLED(CONFIG_IPV6) |
99014088 LL |
3343 | static void br_ip6_multicast_mrd_rcv(struct net_bridge *br, |
3344 | struct net_bridge_port *port, | |
3345 | struct sk_buff *skb) | |
4b3087c7 | 3346 | { |
4b3087c7 | 3347 | if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV) |
99014088 | 3348 | return; |
4b3087c7 | 3349 | |
000b7287 | 3350 | spin_lock(&br->multicast_lock); |
a3c02e76 | 3351 | br_ip6_multicast_mark_router(br, port); |
000b7287 | 3352 | spin_unlock(&br->multicast_lock); |
4b3087c7 LL |
3353 | } |
3354 | ||
08b202b6 YH |
3355 | static int br_multicast_ipv6_rcv(struct net_bridge *br, |
3356 | struct net_bridge_port *port, | |
06499098 VY |
3357 | struct sk_buff *skb, |
3358 | u16 vid) | |
08b202b6 | 3359 | { |
6db6f0ea | 3360 | const unsigned char *src; |
9afd85c9 | 3361 | struct mld_msg *mld; |
08b202b6 YH |
3362 | int err; |
3363 | ||
ba5ea614 | 3364 | err = ipv6_mc_check_mld(skb); |
08b202b6 | 3365 | |
99014088 | 3366 | if (err == -ENOMSG || err == -ENODATA) { |
9afd85c9 LL |
3367 | if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr)) |
3368 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
99014088 LL |
3369 | if (err == -ENODATA && |
3370 | ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr)) | |
3371 | br_ip6_multicast_mrd_rcv(br, port, skb); | |
4b3087c7 | 3372 | |
08b202b6 | 3373 | return 0; |
9afd85c9 | 3374 | } else if (err < 0) { |
1080ab95 | 3375 | br_multicast_err_count(br, port, skb->protocol); |
9afd85c9 | 3376 | return err; |
08b202b6 YH |
3377 | } |
3378 | ||
9afd85c9 | 3379 | mld = (struct mld_msg *)skb_transport_header(skb); |
1080ab95 | 3380 | BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type; |
08b202b6 | 3381 | |
9afd85c9 | 3382 | switch (mld->mld_type) { |
08b202b6 | 3383 | case ICMPV6_MGM_REPORT: |
6db6f0ea | 3384 | src = eth_hdr(skb)->h_source; |
fc2af6c7 | 3385 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
6db6f0ea | 3386 | err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid, |
8b671779 | 3387 | src, true); |
08b202b6 | 3388 | break; |
08b202b6 | 3389 | case ICMPV6_MLD2_REPORT: |
ba5ea614 | 3390 | err = br_ip6_multicast_mld2_report(br, port, skb, vid); |
08b202b6 YH |
3391 | break; |
3392 | case ICMPV6_MGM_QUERY: | |
ba5ea614 | 3393 | err = br_ip6_multicast_query(br, port, skb, vid); |
08b202b6 YH |
3394 | break; |
3395 | case ICMPV6_MGM_REDUCTION: | |
6db6f0ea FF |
3396 | src = eth_hdr(skb)->h_source; |
3397 | br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src); | |
9afd85c9 | 3398 | break; |
08b202b6 YH |
3399 | } |
3400 | ||
a65056ec | 3401 | br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
3402 | BR_MCAST_DIR_RX); |
3403 | ||
08b202b6 YH |
3404 | return err; |
3405 | } | |
3406 | #endif | |
3407 | ||
eb1d1641 | 3408 | int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, |
06499098 | 3409 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 3410 | { |
1080ab95 NA |
3411 | int ret = 0; |
3412 | ||
1fafc7a9 YH |
3413 | BR_INPUT_SKB_CB(skb)->igmp = 0; |
3414 | BR_INPUT_SKB_CB(skb)->mrouters_only = 0; | |
3415 | ||
13cefad2 | 3416 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
3417 | return 0; |
3418 | ||
3419 | switch (skb->protocol) { | |
3420 | case htons(ETH_P_IP): | |
1080ab95 NA |
3421 | ret = br_multicast_ipv4_rcv(br, port, skb, vid); |
3422 | break; | |
dfd56b8b | 3423 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 3424 | case htons(ETH_P_IPV6): |
1080ab95 NA |
3425 | ret = br_multicast_ipv6_rcv(br, port, skb, vid); |
3426 | break; | |
08b202b6 | 3427 | #endif |
eb1d1641 HX |
3428 | } |
3429 | ||
1080ab95 | 3430 | return ret; |
eb1d1641 HX |
3431 | } |
3432 | ||
cc0fdd80 | 3433 | static void br_multicast_query_expired(struct net_bridge *br, |
2cd41431 LL |
3434 | struct bridge_mcast_own_query *query, |
3435 | struct bridge_mcast_querier *querier) | |
cc0fdd80 LL |
3436 | { |
3437 | spin_lock(&br->multicast_lock); | |
3438 | if (query->startup_sent < br->multicast_startup_query_count) | |
3439 | query->startup_sent++; | |
3440 | ||
71d9f614 | 3441 | RCU_INIT_POINTER(querier->port, NULL); |
cc0fdd80 LL |
3442 | br_multicast_send_query(br, NULL, query); |
3443 | spin_unlock(&br->multicast_lock); | |
3444 | } | |
3445 | ||
88c1f37f | 3446 | static void br_ip4_multicast_query_expired(struct timer_list *t) |
eb1d1641 | 3447 | { |
88c1f37f | 3448 | struct net_bridge *br = from_timer(br, t, ip4_own_query.timer); |
eb1d1641 | 3449 | |
2cd41431 | 3450 | br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier); |
cc0fdd80 | 3451 | } |
eb1d1641 | 3452 | |
cc0fdd80 | 3453 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f | 3454 | static void br_ip6_multicast_query_expired(struct timer_list *t) |
cc0fdd80 | 3455 | { |
88c1f37f | 3456 | struct net_bridge *br = from_timer(br, t, ip6_own_query.timer); |
eb1d1641 | 3457 | |
2cd41431 | 3458 | br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier); |
eb1d1641 | 3459 | } |
cc0fdd80 | 3460 | #endif |
eb1d1641 | 3461 | |
e12cec65 | 3462 | static void br_multicast_gc_work(struct work_struct *work) |
8b671779 NA |
3463 | { |
3464 | struct net_bridge *br = container_of(work, struct net_bridge, | |
e12cec65 | 3465 | mcast_gc_work); |
8b671779 NA |
3466 | HLIST_HEAD(deleted_head); |
3467 | ||
3468 | spin_lock_bh(&br->multicast_lock); | |
e12cec65 | 3469 | hlist_move_list(&br->mcast_gc_list, &deleted_head); |
8b671779 NA |
3470 | spin_unlock_bh(&br->multicast_lock); |
3471 | ||
e12cec65 | 3472 | br_multicast_gc(&deleted_head); |
8b671779 NA |
3473 | } |
3474 | ||
eb1d1641 HX |
3475 | void br_multicast_init(struct net_bridge *br) |
3476 | { | |
d08c6bc0 | 3477 | br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX; |
eb1d1641 | 3478 | |
7f0aec7a | 3479 | br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
eb1d1641 HX |
3480 | br->multicast_last_member_count = 2; |
3481 | br->multicast_startup_query_count = 2; | |
3482 | ||
3483 | br->multicast_last_member_interval = HZ; | |
3484 | br->multicast_query_response_interval = 10 * HZ; | |
3485 | br->multicast_startup_query_interval = 125 * HZ / 4; | |
3486 | br->multicast_query_interval = 125 * HZ; | |
3487 | br->multicast_querier_interval = 255 * HZ; | |
3488 | br->multicast_membership_interval = 260 * HZ; | |
3489 | ||
90010b36 | 3490 | br->ip4_other_query.delay_time = 0; |
2cd41431 | 3491 | br->ip4_querier.port = NULL; |
aa2ae3e7 | 3492 | br->multicast_igmp_version = 2; |
cc0fdd80 | 3493 | #if IS_ENABLED(CONFIG_IPV6) |
aa2ae3e7 | 3494 | br->multicast_mld_version = 1; |
90010b36 | 3495 | br->ip6_other_query.delay_time = 0; |
2cd41431 | 3496 | br->ip6_querier.port = NULL; |
cc0fdd80 | 3497 | #endif |
6919622a | 3498 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true); |
675779ad | 3499 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); |
b00589af | 3500 | |
eb1d1641 | 3501 | spin_lock_init(&br->multicast_lock); |
ce6f7097 | 3502 | timer_setup(&br->ip4_mc_router_timer, |
ee5fb222 | 3503 | br_ip4_multicast_local_router_expired, 0); |
88c1f37f AP |
3504 | timer_setup(&br->ip4_other_query.timer, |
3505 | br_ip4_multicast_querier_expired, 0); | |
3506 | timer_setup(&br->ip4_own_query.timer, | |
3507 | br_ip4_multicast_query_expired, 0); | |
cc0fdd80 | 3508 | #if IS_ENABLED(CONFIG_IPV6) |
a3c02e76 LL |
3509 | timer_setup(&br->ip6_mc_router_timer, |
3510 | br_ip6_multicast_local_router_expired, 0); | |
88c1f37f AP |
3511 | timer_setup(&br->ip6_other_query.timer, |
3512 | br_ip6_multicast_querier_expired, 0); | |
3513 | timer_setup(&br->ip6_own_query.timer, | |
3514 | br_ip6_multicast_query_expired, 0); | |
cc0fdd80 | 3515 | #endif |
19e3a9c9 | 3516 | INIT_HLIST_HEAD(&br->mdb_list); |
e12cec65 NA |
3517 | INIT_HLIST_HEAD(&br->mcast_gc_list); |
3518 | INIT_WORK(&br->mcast_gc_work, br_multicast_gc_work); | |
eb1d1641 HX |
3519 | } |
3520 | ||
4effd28c LL |
3521 | static void br_ip4_multicast_join_snoopers(struct net_bridge *br) |
3522 | { | |
3523 | struct in_device *in_dev = in_dev_get(br->dev); | |
3524 | ||
3525 | if (!in_dev) | |
3526 | return; | |
3527 | ||
9fb20801 | 3528 | __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC); |
4effd28c LL |
3529 | in_dev_put(in_dev); |
3530 | } | |
3531 | ||
3532 | #if IS_ENABLED(CONFIG_IPV6) | |
3533 | static void br_ip6_multicast_join_snoopers(struct net_bridge *br) | |
3534 | { | |
3535 | struct in6_addr addr; | |
3536 | ||
3537 | ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a)); | |
3538 | ipv6_dev_mc_inc(br->dev, &addr); | |
3539 | } | |
3540 | #else | |
3541 | static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br) | |
3542 | { | |
3543 | } | |
3544 | #endif | |
3545 | ||
851d0a73 | 3546 | void br_multicast_join_snoopers(struct net_bridge *br) |
4effd28c LL |
3547 | { |
3548 | br_ip4_multicast_join_snoopers(br); | |
3549 | br_ip6_multicast_join_snoopers(br); | |
3550 | } | |
3551 | ||
3552 | static void br_ip4_multicast_leave_snoopers(struct net_bridge *br) | |
3553 | { | |
3554 | struct in_device *in_dev = in_dev_get(br->dev); | |
3555 | ||
3556 | if (WARN_ON(!in_dev)) | |
3557 | return; | |
3558 | ||
9fb20801 | 3559 | __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC); |
4effd28c LL |
3560 | in_dev_put(in_dev); |
3561 | } | |
3562 | ||
3563 | #if IS_ENABLED(CONFIG_IPV6) | |
3564 | static void br_ip6_multicast_leave_snoopers(struct net_bridge *br) | |
3565 | { | |
3566 | struct in6_addr addr; | |
3567 | ||
3568 | ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a)); | |
3569 | ipv6_dev_mc_dec(br->dev, &addr); | |
3570 | } | |
3571 | #else | |
3572 | static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br) | |
3573 | { | |
3574 | } | |
3575 | #endif | |
3576 | ||
851d0a73 | 3577 | void br_multicast_leave_snoopers(struct net_bridge *br) |
4effd28c LL |
3578 | { |
3579 | br_ip4_multicast_leave_snoopers(br); | |
3580 | br_ip6_multicast_leave_snoopers(br); | |
3581 | } | |
3582 | ||
cc0fdd80 | 3583 | static void __br_multicast_open(struct net_bridge *br, |
90010b36 | 3584 | struct bridge_mcast_own_query *query) |
eb1d1641 | 3585 | { |
cc0fdd80 | 3586 | query->startup_sent = 0; |
eb1d1641 | 3587 | |
13cefad2 | 3588 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
3589 | return; |
3590 | ||
cc0fdd80 LL |
3591 | mod_timer(&query->timer, jiffies); |
3592 | } | |
3593 | ||
3594 | void br_multicast_open(struct net_bridge *br) | |
3595 | { | |
90010b36 | 3596 | __br_multicast_open(br, &br->ip4_own_query); |
cc0fdd80 | 3597 | #if IS_ENABLED(CONFIG_IPV6) |
90010b36 | 3598 | __br_multicast_open(br, &br->ip6_own_query); |
cc0fdd80 | 3599 | #endif |
eb1d1641 HX |
3600 | } |
3601 | ||
3602 | void br_multicast_stop(struct net_bridge *br) | |
3603 | { | |
ce6f7097 | 3604 | del_timer_sync(&br->ip4_mc_router_timer); |
90010b36 LL |
3605 | del_timer_sync(&br->ip4_other_query.timer); |
3606 | del_timer_sync(&br->ip4_own_query.timer); | |
cc0fdd80 | 3607 | #if IS_ENABLED(CONFIG_IPV6) |
a3c02e76 | 3608 | del_timer_sync(&br->ip6_mc_router_timer); |
90010b36 LL |
3609 | del_timer_sync(&br->ip6_other_query.timer); |
3610 | del_timer_sync(&br->ip6_own_query.timer); | |
cc0fdd80 | 3611 | #endif |
e10177ab SA |
3612 | } |
3613 | ||
3614 | void br_multicast_dev_del(struct net_bridge *br) | |
3615 | { | |
e10177ab | 3616 | struct net_bridge_mdb_entry *mp; |
8b671779 | 3617 | HLIST_HEAD(deleted_head); |
19e3a9c9 | 3618 | struct hlist_node *tmp; |
eb1d1641 HX |
3619 | |
3620 | spin_lock_bh(&br->multicast_lock); | |
e12cec65 NA |
3621 | hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node) |
3622 | br_multicast_del_mdb_entry(mp); | |
3623 | hlist_move_list(&br->mcast_gc_list, &deleted_head); | |
eb1d1641 | 3624 | spin_unlock_bh(&br->multicast_lock); |
19e3a9c9 | 3625 | |
e12cec65 NA |
3626 | br_multicast_gc(&deleted_head); |
3627 | cancel_work_sync(&br->mcast_gc_work); | |
8b671779 | 3628 | |
4329596c | 3629 | rcu_barrier(); |
eb1d1641 | 3630 | } |
0909e117 HX |
3631 | |
3632 | int br_multicast_set_router(struct net_bridge *br, unsigned long val) | |
3633 | { | |
6ae4ae8e | 3634 | int err = -EINVAL; |
0909e117 HX |
3635 | |
3636 | spin_lock_bh(&br->multicast_lock); | |
0909e117 HX |
3637 | |
3638 | switch (val) { | |
7f0aec7a NA |
3639 | case MDB_RTR_TYPE_DISABLED: |
3640 | case MDB_RTR_TYPE_PERM: | |
77041420 | 3641 | br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM); |
ce6f7097 | 3642 | del_timer(&br->ip4_mc_router_timer); |
a3c02e76 LL |
3643 | #if IS_ENABLED(CONFIG_IPV6) |
3644 | del_timer(&br->ip6_mc_router_timer); | |
3645 | #endif | |
77041420 YG |
3646 | br->multicast_router = val; |
3647 | err = 0; | |
3648 | break; | |
7f0aec7a | 3649 | case MDB_RTR_TYPE_TEMP_QUERY: |
77041420 YG |
3650 | if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY) |
3651 | br_mc_router_state_change(br, false); | |
0909e117 HX |
3652 | br->multicast_router = val; |
3653 | err = 0; | |
3654 | break; | |
0909e117 HX |
3655 | } |
3656 | ||
0909e117 HX |
3657 | spin_unlock_bh(&br->multicast_lock); |
3658 | ||
3659 | return err; | |
3660 | } | |
3661 | ||
ed2d3597 LL |
3662 | static void |
3663 | br_multicast_rport_del_notify(struct net_bridge_port *p, bool deleted) | |
7f0aec7a | 3664 | { |
ed2d3597 | 3665 | if (!deleted) |
7f0aec7a | 3666 | return; |
ed2d3597 | 3667 | |
a3c02e76 LL |
3668 | /* For backwards compatibility for now, only notify if there is |
3669 | * no multicast router anymore for both IPv4 and IPv6. | |
3670 | */ | |
3671 | if (!hlist_unhashed(&p->ip4_rlist)) | |
3672 | return; | |
3673 | #if IS_ENABLED(CONFIG_IPV6) | |
3674 | if (!hlist_unhashed(&p->ip6_rlist)) | |
3675 | return; | |
3676 | #endif | |
3677 | ||
7f0aec7a | 3678 | br_rtr_notify(p->br->dev, p, RTM_DELMDB); |
6d549648 | 3679 | br_port_mc_router_state_change(p, false); |
f12e7d95 NF |
3680 | |
3681 | /* don't allow timer refresh */ | |
3682 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) | |
3683 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
7f0aec7a NA |
3684 | } |
3685 | ||
0909e117 HX |
3686 | int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val) |
3687 | { | |
3688 | struct net_bridge *br = p->br; | |
a55d8246 | 3689 | unsigned long now = jiffies; |
6ae4ae8e | 3690 | int err = -EINVAL; |
ed2d3597 | 3691 | bool del = false; |
0909e117 HX |
3692 | |
3693 | spin_lock(&br->multicast_lock); | |
4950cfd1 | 3694 | if (p->multicast_router == val) { |
a55d8246 | 3695 | /* Refresh the temp router port timer */ |
a3c02e76 | 3696 | if (p->multicast_router == MDB_RTR_TYPE_TEMP) { |
ce6f7097 | 3697 | mod_timer(&p->ip4_mc_router_timer, |
a55d8246 | 3698 | now + br->multicast_querier_interval); |
a3c02e76 LL |
3699 | #if IS_ENABLED(CONFIG_IPV6) |
3700 | mod_timer(&p->ip6_mc_router_timer, | |
3701 | now + br->multicast_querier_interval); | |
3702 | #endif | |
3703 | } | |
4950cfd1 NA |
3704 | err = 0; |
3705 | goto unlock; | |
3706 | } | |
0909e117 | 3707 | switch (val) { |
7f0aec7a NA |
3708 | case MDB_RTR_TYPE_DISABLED: |
3709 | p->multicast_router = MDB_RTR_TYPE_DISABLED; | |
ed2d3597 | 3710 | del |= br_ip4_multicast_rport_del(p); |
ce6f7097 | 3711 | del_timer(&p->ip4_mc_router_timer); |
a3c02e76 LL |
3712 | del |= br_ip6_multicast_rport_del(p); |
3713 | #if IS_ENABLED(CONFIG_IPV6) | |
3714 | del_timer(&p->ip6_mc_router_timer); | |
3715 | #endif | |
ed2d3597 | 3716 | br_multicast_rport_del_notify(p, del); |
7f0aec7a NA |
3717 | break; |
3718 | case MDB_RTR_TYPE_TEMP_QUERY: | |
3719 | p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
ed2d3597 | 3720 | del |= br_ip4_multicast_rport_del(p); |
a3c02e76 | 3721 | del |= br_ip6_multicast_rport_del(p); |
ed2d3597 | 3722 | br_multicast_rport_del_notify(p, del); |
7f0aec7a NA |
3723 | break; |
3724 | case MDB_RTR_TYPE_PERM: | |
3725 | p->multicast_router = MDB_RTR_TYPE_PERM; | |
ce6f7097 | 3726 | del_timer(&p->ip4_mc_router_timer); |
d9b8c4d8 | 3727 | br_ip4_multicast_add_router(br, p); |
a3c02e76 LL |
3728 | #if IS_ENABLED(CONFIG_IPV6) |
3729 | del_timer(&p->ip6_mc_router_timer); | |
3730 | #endif | |
3731 | br_ip6_multicast_add_router(br, p); | |
0909e117 | 3732 | break; |
a55d8246 NA |
3733 | case MDB_RTR_TYPE_TEMP: |
3734 | p->multicast_router = MDB_RTR_TYPE_TEMP; | |
d9b8c4d8 | 3735 | br_ip4_multicast_mark_router(br, p); |
a3c02e76 | 3736 | br_ip6_multicast_mark_router(br, p); |
a55d8246 | 3737 | break; |
7f0aec7a NA |
3738 | default: |
3739 | goto unlock; | |
0909e117 | 3740 | } |
7f0aec7a NA |
3741 | err = 0; |
3742 | unlock: | |
0909e117 HX |
3743 | spin_unlock(&br->multicast_lock); |
3744 | ||
3745 | return err; | |
3746 | } | |
561f1103 | 3747 | |
cc0fdd80 | 3748 | static void br_multicast_start_querier(struct net_bridge *br, |
90010b36 | 3749 | struct bridge_mcast_own_query *query) |
561f1103 HX |
3750 | { |
3751 | struct net_bridge_port *port; | |
74857216 | 3752 | |
cc0fdd80 | 3753 | __br_multicast_open(br, query); |
74857216 | 3754 | |
c5b493ce NA |
3755 | rcu_read_lock(); |
3756 | list_for_each_entry_rcu(port, &br->port_list, list) { | |
74857216 HX |
3757 | if (port->state == BR_STATE_DISABLED || |
3758 | port->state == BR_STATE_BLOCKING) | |
3759 | continue; | |
3760 | ||
90010b36 LL |
3761 | if (query == &br->ip4_own_query) |
3762 | br_multicast_enable(&port->ip4_own_query); | |
cc0fdd80 LL |
3763 | #if IS_ENABLED(CONFIG_IPV6) |
3764 | else | |
90010b36 | 3765 | br_multicast_enable(&port->ip6_own_query); |
cc0fdd80 | 3766 | #endif |
74857216 | 3767 | } |
c5b493ce | 3768 | rcu_read_unlock(); |
74857216 HX |
3769 | } |
3770 | ||
ae1ea84b FF |
3771 | int br_multicast_toggle(struct net_bridge *br, unsigned long val, |
3772 | struct netlink_ext_ack *extack) | |
74857216 | 3773 | { |
7cb3f921 | 3774 | struct net_bridge_port *port; |
851d0a73 | 3775 | bool change_snoopers = false; |
ae1ea84b | 3776 | int err = 0; |
561f1103 | 3777 | |
ef5e0d82 | 3778 | spin_lock_bh(&br->multicast_lock); |
13cefad2 | 3779 | if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val) |
561f1103 HX |
3780 | goto unlock; |
3781 | ||
ae1ea84b FF |
3782 | err = br_mc_disabled_update(br->dev, val, extack); |
3783 | if (err == -EOPNOTSUPP) | |
3784 | err = 0; | |
3785 | if (err) | |
3786 | goto unlock; | |
3787 | ||
13cefad2 | 3788 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val); |
4effd28c | 3789 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) { |
851d0a73 | 3790 | change_snoopers = true; |
561f1103 | 3791 | goto unlock; |
4effd28c | 3792 | } |
561f1103 | 3793 | |
3a7fda06 HX |
3794 | if (!netif_running(br->dev)) |
3795 | goto unlock; | |
3796 | ||
7cb3f921 NA |
3797 | br_multicast_open(br); |
3798 | list_for_each_entry(port, &br->port_list, list) | |
3799 | __br_multicast_enable_port(port); | |
561f1103 | 3800 | |
851d0a73 JH |
3801 | change_snoopers = true; |
3802 | ||
561f1103 | 3803 | unlock: |
ef5e0d82 | 3804 | spin_unlock_bh(&br->multicast_lock); |
561f1103 | 3805 | |
851d0a73 JH |
3806 | /* br_multicast_join_snoopers has the potential to cause |
3807 | * an MLD Report/Leave to be delivered to br_multicast_rcv, | |
3808 | * which would in turn call br_multicast_add_group, which would | |
3809 | * attempt to acquire multicast_lock. This function should be | |
3810 | * called after the lock has been released to avoid deadlocks on | |
3811 | * multicast_lock. | |
3812 | * | |
3813 | * br_multicast_leave_snoopers does not have the problem since | |
3814 | * br_multicast_rcv first checks BROPT_MULTICAST_ENABLED, and | |
3815 | * returns without calling br_multicast_ipv4/6_rcv if it's not | |
3816 | * enabled. Moved both functions out just for symmetry. | |
3817 | */ | |
3818 | if (change_snoopers) { | |
3819 | if (br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
3820 | br_multicast_join_snoopers(br); | |
3821 | else | |
3822 | br_multicast_leave_snoopers(br); | |
3823 | } | |
3824 | ||
ae1ea84b | 3825 | return err; |
561f1103 | 3826 | } |
b195167f | 3827 | |
9341b988 IS |
3828 | bool br_multicast_enabled(const struct net_device *dev) |
3829 | { | |
3830 | struct net_bridge *br = netdev_priv(dev); | |
3831 | ||
13cefad2 | 3832 | return !!br_opt_get(br, BROPT_MULTICAST_ENABLED); |
9341b988 IS |
3833 | } |
3834 | EXPORT_SYMBOL_GPL(br_multicast_enabled); | |
3835 | ||
0912bda4 YG |
3836 | bool br_multicast_router(const struct net_device *dev) |
3837 | { | |
3838 | struct net_bridge *br = netdev_priv(dev); | |
3839 | bool is_router; | |
3840 | ||
3841 | spin_lock_bh(&br->multicast_lock); | |
1a3065a2 | 3842 | is_router = br_multicast_is_router(br, NULL); |
0912bda4 YG |
3843 | spin_unlock_bh(&br->multicast_lock); |
3844 | return is_router; | |
3845 | } | |
3846 | EXPORT_SYMBOL_GPL(br_multicast_router); | |
3847 | ||
c5c23260 HX |
3848 | int br_multicast_set_querier(struct net_bridge *br, unsigned long val) |
3849 | { | |
b00589af LL |
3850 | unsigned long max_delay; |
3851 | ||
c5c23260 HX |
3852 | val = !!val; |
3853 | ||
3854 | spin_lock_bh(&br->multicast_lock); | |
675779ad | 3855 | if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val) |
c5c23260 HX |
3856 | goto unlock; |
3857 | ||
675779ad | 3858 | br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val); |
b00589af LL |
3859 | if (!val) |
3860 | goto unlock; | |
3861 | ||
3862 | max_delay = br->multicast_query_response_interval; | |
b00589af | 3863 | |
90010b36 LL |
3864 | if (!timer_pending(&br->ip4_other_query.timer)) |
3865 | br->ip4_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 3866 | |
90010b36 | 3867 | br_multicast_start_querier(br, &br->ip4_own_query); |
cc0fdd80 LL |
3868 | |
3869 | #if IS_ENABLED(CONFIG_IPV6) | |
90010b36 LL |
3870 | if (!timer_pending(&br->ip6_other_query.timer)) |
3871 | br->ip6_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 3872 | |
90010b36 | 3873 | br_multicast_start_querier(br, &br->ip6_own_query); |
cc0fdd80 | 3874 | #endif |
c5c23260 HX |
3875 | |
3876 | unlock: | |
3877 | spin_unlock_bh(&br->multicast_lock); | |
3878 | ||
3879 | return 0; | |
3880 | } | |
3881 | ||
5e923585 NA |
3882 | int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val) |
3883 | { | |
3884 | /* Currently we support only version 2 and 3 */ | |
3885 | switch (val) { | |
3886 | case 2: | |
3887 | case 3: | |
3888 | break; | |
3889 | default: | |
3890 | return -EINVAL; | |
3891 | } | |
3892 | ||
3893 | spin_lock_bh(&br->multicast_lock); | |
3894 | br->multicast_igmp_version = val; | |
3895 | spin_unlock_bh(&br->multicast_lock); | |
3896 | ||
3897 | return 0; | |
3898 | } | |
3899 | ||
aa2ae3e7 NA |
3900 | #if IS_ENABLED(CONFIG_IPV6) |
3901 | int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val) | |
3902 | { | |
3903 | /* Currently we support version 1 and 2 */ | |
3904 | switch (val) { | |
3905 | case 1: | |
3906 | case 2: | |
3907 | break; | |
3908 | default: | |
3909 | return -EINVAL; | |
3910 | } | |
3911 | ||
3912 | spin_lock_bh(&br->multicast_lock); | |
3913 | br->multicast_mld_version = val; | |
3914 | spin_unlock_bh(&br->multicast_lock); | |
3915 | ||
3916 | return 0; | |
3917 | } | |
3918 | #endif | |
3919 | ||
07f8ac4a LL |
3920 | /** |
3921 | * br_multicast_list_adjacent - Returns snooped multicast addresses | |
3922 | * @dev: The bridge port adjacent to which to retrieve addresses | |
3923 | * @br_ip_list: The list to store found, snooped multicast IP addresses in | |
3924 | * | |
3925 | * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast | |
3926 | * snooping feature on all bridge ports of dev's bridge device, excluding | |
3927 | * the addresses from dev itself. | |
3928 | * | |
3929 | * Returns the number of items added to br_ip_list. | |
3930 | * | |
3931 | * Notes: | |
3932 | * - br_ip_list needs to be initialized by caller | |
3933 | * - br_ip_list might contain duplicates in the end | |
3934 | * (needs to be taken care of by caller) | |
3935 | * - br_ip_list needs to be freed by caller | |
3936 | */ | |
3937 | int br_multicast_list_adjacent(struct net_device *dev, | |
3938 | struct list_head *br_ip_list) | |
3939 | { | |
3940 | struct net_bridge *br; | |
3941 | struct net_bridge_port *port; | |
3942 | struct net_bridge_port_group *group; | |
3943 | struct br_ip_list *entry; | |
3944 | int count = 0; | |
3945 | ||
3946 | rcu_read_lock(); | |
35f861e3 | 3947 | if (!br_ip_list || !netif_is_bridge_port(dev)) |
07f8ac4a LL |
3948 | goto unlock; |
3949 | ||
3950 | port = br_port_get_rcu(dev); | |
3951 | if (!port || !port->br) | |
3952 | goto unlock; | |
3953 | ||
3954 | br = port->br; | |
3955 | ||
3956 | list_for_each_entry_rcu(port, &br->port_list, list) { | |
3957 | if (!port->dev || port->dev == dev) | |
3958 | continue; | |
3959 | ||
3960 | hlist_for_each_entry_rcu(group, &port->mglist, mglist) { | |
3961 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); | |
3962 | if (!entry) | |
3963 | goto unlock; | |
3964 | ||
085b53c8 | 3965 | entry->addr = group->key.addr; |
07f8ac4a LL |
3966 | list_add(&entry->list, br_ip_list); |
3967 | count++; | |
3968 | } | |
3969 | } | |
3970 | ||
3971 | unlock: | |
3972 | rcu_read_unlock(); | |
3973 | return count; | |
3974 | } | |
3975 | EXPORT_SYMBOL_GPL(br_multicast_list_adjacent); | |
2cd41431 | 3976 | |
c34963e2 LL |
3977 | /** |
3978 | * br_multicast_has_querier_anywhere - Checks for a querier on a bridge | |
3979 | * @dev: The bridge port providing the bridge on which to check for a querier | |
3980 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
3981 | * | |
3982 | * Checks whether the given interface has a bridge on top and if so returns | |
3983 | * true if a valid querier exists anywhere on the bridged link layer. | |
3984 | * Otherwise returns false. | |
3985 | */ | |
3986 | bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto) | |
3987 | { | |
3988 | struct net_bridge *br; | |
3989 | struct net_bridge_port *port; | |
3990 | struct ethhdr eth; | |
3991 | bool ret = false; | |
3992 | ||
3993 | rcu_read_lock(); | |
35f861e3 | 3994 | if (!netif_is_bridge_port(dev)) |
c34963e2 LL |
3995 | goto unlock; |
3996 | ||
3997 | port = br_port_get_rcu(dev); | |
3998 | if (!port || !port->br) | |
3999 | goto unlock; | |
4000 | ||
4001 | br = port->br; | |
4002 | ||
4003 | memset(ð, 0, sizeof(eth)); | |
4004 | eth.h_proto = htons(proto); | |
4005 | ||
955062b0 | 4006 | ret = br_multicast_querier_exists(br, ð, NULL); |
c34963e2 LL |
4007 | |
4008 | unlock: | |
4009 | rcu_read_unlock(); | |
4010 | return ret; | |
4011 | } | |
4012 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere); | |
4013 | ||
2cd41431 LL |
4014 | /** |
4015 | * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port | |
4016 | * @dev: The bridge port adjacent to which to check for a querier | |
4017 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
4018 | * | |
4019 | * Checks whether the given interface has a bridge on top and if so returns | |
4020 | * true if a selected querier is behind one of the other ports of this | |
4021 | * bridge. Otherwise returns false. | |
4022 | */ | |
4023 | bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto) | |
4024 | { | |
4025 | struct net_bridge *br; | |
4026 | struct net_bridge_port *port; | |
4027 | bool ret = false; | |
4028 | ||
4029 | rcu_read_lock(); | |
35f861e3 | 4030 | if (!netif_is_bridge_port(dev)) |
2cd41431 LL |
4031 | goto unlock; |
4032 | ||
4033 | port = br_port_get_rcu(dev); | |
4034 | if (!port || !port->br) | |
4035 | goto unlock; | |
4036 | ||
4037 | br = port->br; | |
4038 | ||
4039 | switch (proto) { | |
4040 | case ETH_P_IP: | |
4041 | if (!timer_pending(&br->ip4_other_query.timer) || | |
4042 | rcu_dereference(br->ip4_querier.port) == port) | |
4043 | goto unlock; | |
4044 | break; | |
3993c4e1 | 4045 | #if IS_ENABLED(CONFIG_IPV6) |
2cd41431 LL |
4046 | case ETH_P_IPV6: |
4047 | if (!timer_pending(&br->ip6_other_query.timer) || | |
4048 | rcu_dereference(br->ip6_querier.port) == port) | |
4049 | goto unlock; | |
4050 | break; | |
3993c4e1 | 4051 | #endif |
2cd41431 LL |
4052 | default: |
4053 | goto unlock; | |
4054 | } | |
4055 | ||
4056 | ret = true; | |
4057 | unlock: | |
4058 | rcu_read_unlock(); | |
4059 | return ret; | |
4060 | } | |
4061 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent); | |
1080ab95 | 4062 | |
3b85f9ba LL |
4063 | /** |
4064 | * br_multicast_has_router_adjacent - Checks for a router behind a bridge port | |
4065 | * @dev: The bridge port adjacent to which to check for a multicast router | |
4066 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
4067 | * | |
4068 | * Checks whether the given interface has a bridge on top and if so returns | |
4069 | * true if a multicast router is behind one of the other ports of this | |
4070 | * bridge. Otherwise returns false. | |
4071 | */ | |
4072 | bool br_multicast_has_router_adjacent(struct net_device *dev, int proto) | |
4073 | { | |
4074 | struct net_bridge_port *port, *p; | |
4075 | bool ret = false; | |
4076 | ||
4077 | rcu_read_lock(); | |
4078 | port = br_port_get_check_rcu(dev); | |
4079 | if (!port) | |
4080 | goto unlock; | |
4081 | ||
4082 | switch (proto) { | |
4083 | case ETH_P_IP: | |
4084 | hlist_for_each_entry_rcu(p, &port->br->ip4_mc_router_list, | |
4085 | ip4_rlist) { | |
4086 | if (p == port) | |
4087 | continue; | |
4088 | ||
4089 | ret = true; | |
4090 | goto unlock; | |
4091 | } | |
4092 | break; | |
4093 | #if IS_ENABLED(CONFIG_IPV6) | |
4094 | case ETH_P_IPV6: | |
4095 | hlist_for_each_entry_rcu(p, &port->br->ip6_mc_router_list, | |
4096 | ip6_rlist) { | |
4097 | if (p == port) | |
4098 | continue; | |
4099 | ||
4100 | ret = true; | |
4101 | goto unlock; | |
4102 | } | |
4103 | break; | |
4104 | #endif | |
4105 | default: | |
4106 | /* when compiled without IPv6 support, be conservative and | |
4107 | * always assume presence of an IPv6 multicast router | |
4108 | */ | |
4109 | ret = true; | |
4110 | } | |
4111 | ||
4112 | unlock: | |
4113 | rcu_read_unlock(); | |
4114 | return ret; | |
4115 | } | |
4116 | EXPORT_SYMBOL_GPL(br_multicast_has_router_adjacent); | |
4117 | ||
1080ab95 | 4118 | static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, |
a65056ec | 4119 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
4120 | { |
4121 | struct bridge_mcast_stats *pstats = this_cpu_ptr(stats); | |
a65056ec NA |
4122 | __be16 proto = skb->protocol; |
4123 | unsigned int t_len; | |
1080ab95 NA |
4124 | |
4125 | u64_stats_update_begin(&pstats->syncp); | |
4126 | switch (proto) { | |
4127 | case htons(ETH_P_IP): | |
a65056ec | 4128 | t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb); |
1080ab95 NA |
4129 | switch (type) { |
4130 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
4131 | pstats->mstats.igmp_v1reports[dir]++; | |
4132 | break; | |
4133 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
4134 | pstats->mstats.igmp_v2reports[dir]++; | |
4135 | break; | |
4136 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
4137 | pstats->mstats.igmp_v3reports[dir]++; | |
4138 | break; | |
4139 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
a65056ec NA |
4140 | if (t_len != sizeof(struct igmphdr)) { |
4141 | pstats->mstats.igmp_v3queries[dir]++; | |
4142 | } else { | |
4143 | unsigned int offset = skb_transport_offset(skb); | |
4144 | struct igmphdr *ih, _ihdr; | |
4145 | ||
4146 | ih = skb_header_pointer(skb, offset, | |
4147 | sizeof(_ihdr), &_ihdr); | |
4148 | if (!ih) | |
4149 | break; | |
4150 | if (!ih->code) | |
4151 | pstats->mstats.igmp_v1queries[dir]++; | |
4152 | else | |
4153 | pstats->mstats.igmp_v2queries[dir]++; | |
4154 | } | |
1080ab95 NA |
4155 | break; |
4156 | case IGMP_HOST_LEAVE_MESSAGE: | |
4157 | pstats->mstats.igmp_leaves[dir]++; | |
4158 | break; | |
4159 | } | |
4160 | break; | |
4161 | #if IS_ENABLED(CONFIG_IPV6) | |
4162 | case htons(ETH_P_IPV6): | |
a65056ec NA |
4163 | t_len = ntohs(ipv6_hdr(skb)->payload_len) + |
4164 | sizeof(struct ipv6hdr); | |
4165 | t_len -= skb_network_header_len(skb); | |
1080ab95 NA |
4166 | switch (type) { |
4167 | case ICMPV6_MGM_REPORT: | |
4168 | pstats->mstats.mld_v1reports[dir]++; | |
4169 | break; | |
4170 | case ICMPV6_MLD2_REPORT: | |
4171 | pstats->mstats.mld_v2reports[dir]++; | |
4172 | break; | |
4173 | case ICMPV6_MGM_QUERY: | |
a65056ec NA |
4174 | if (t_len != sizeof(struct mld_msg)) |
4175 | pstats->mstats.mld_v2queries[dir]++; | |
4176 | else | |
4177 | pstats->mstats.mld_v1queries[dir]++; | |
1080ab95 NA |
4178 | break; |
4179 | case ICMPV6_MGM_REDUCTION: | |
4180 | pstats->mstats.mld_leaves[dir]++; | |
4181 | break; | |
4182 | } | |
4183 | break; | |
4184 | #endif /* CONFIG_IPV6 */ | |
4185 | } | |
4186 | u64_stats_update_end(&pstats->syncp); | |
4187 | } | |
4188 | ||
4189 | void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, | |
a65056ec | 4190 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
4191 | { |
4192 | struct bridge_mcast_stats __percpu *stats; | |
4193 | ||
4194 | /* if multicast_disabled is true then igmp type can't be set */ | |
675779ad | 4195 | if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) |
1080ab95 NA |
4196 | return; |
4197 | ||
4198 | if (p) | |
4199 | stats = p->mcast_stats; | |
4200 | else | |
4201 | stats = br->mcast_stats; | |
4202 | if (WARN_ON(!stats)) | |
4203 | return; | |
4204 | ||
a65056ec | 4205 | br_mcast_stats_add(stats, skb, type, dir); |
1080ab95 NA |
4206 | } |
4207 | ||
4208 | int br_multicast_init_stats(struct net_bridge *br) | |
4209 | { | |
4210 | br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); | |
4211 | if (!br->mcast_stats) | |
4212 | return -ENOMEM; | |
4213 | ||
4214 | return 0; | |
4215 | } | |
4216 | ||
b6fe0440 IS |
4217 | void br_multicast_uninit_stats(struct net_bridge *br) |
4218 | { | |
4219 | free_percpu(br->mcast_stats); | |
4220 | } | |
4221 | ||
b3b6a84c AB |
4222 | /* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */ |
4223 | static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src) | |
1080ab95 NA |
4224 | { |
4225 | dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX]; | |
4226 | dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX]; | |
4227 | } | |
4228 | ||
4229 | void br_multicast_get_stats(const struct net_bridge *br, | |
4230 | const struct net_bridge_port *p, | |
4231 | struct br_mcast_stats *dest) | |
4232 | { | |
4233 | struct bridge_mcast_stats __percpu *stats; | |
4234 | struct br_mcast_stats tdst; | |
4235 | int i; | |
4236 | ||
4237 | memset(dest, 0, sizeof(*dest)); | |
4238 | if (p) | |
4239 | stats = p->mcast_stats; | |
4240 | else | |
4241 | stats = br->mcast_stats; | |
4242 | if (WARN_ON(!stats)) | |
4243 | return; | |
4244 | ||
4245 | memset(&tdst, 0, sizeof(tdst)); | |
4246 | for_each_possible_cpu(i) { | |
4247 | struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i); | |
4248 | struct br_mcast_stats temp; | |
4249 | unsigned int start; | |
4250 | ||
4251 | do { | |
4252 | start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); | |
4253 | memcpy(&temp, &cpu_stats->mstats, sizeof(temp)); | |
4254 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); | |
4255 | ||
a65056ec NA |
4256 | mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries); |
4257 | mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries); | |
4258 | mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries); | |
1080ab95 NA |
4259 | mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves); |
4260 | mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports); | |
4261 | mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports); | |
4262 | mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports); | |
4263 | tdst.igmp_parse_errors += temp.igmp_parse_errors; | |
4264 | ||
a65056ec NA |
4265 | mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries); |
4266 | mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries); | |
1080ab95 NA |
4267 | mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves); |
4268 | mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports); | |
4269 | mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports); | |
4270 | tdst.mld_parse_errors += temp.mld_parse_errors; | |
4271 | } | |
4272 | memcpy(dest, &tdst, sizeof(*dest)); | |
4273 | } | |
19e3a9c9 NA |
4274 | |
4275 | int br_mdb_hash_init(struct net_bridge *br) | |
4276 | { | |
085b53c8 NA |
4277 | int err; |
4278 | ||
4279 | err = rhashtable_init(&br->sg_port_tbl, &br_sg_port_rht_params); | |
4280 | if (err) | |
4281 | return err; | |
4282 | ||
4283 | err = rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params); | |
4284 | if (err) { | |
4285 | rhashtable_destroy(&br->sg_port_tbl); | |
4286 | return err; | |
4287 | } | |
4288 | ||
4289 | return 0; | |
19e3a9c9 NA |
4290 | } |
4291 | ||
4292 | void br_mdb_hash_fini(struct net_bridge *br) | |
4293 | { | |
085b53c8 | 4294 | rhashtable_destroy(&br->sg_port_tbl); |
19e3a9c9 NA |
4295 | rhashtable_destroy(&br->mdb_hash_tbl); |
4296 | } |