Commit | Line | Data |
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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 |
b57e8d87 | 34 | #include <trace/events/bridge.h> |
eb1d1641 HX |
35 | |
36 | #include "br_private.h" | |
8f07b831 | 37 | #include "br_private_mcast_eht.h" |
eb1d1641 | 38 | |
19e3a9c9 NA |
39 | static const struct rhashtable_params br_mdb_rht_params = { |
40 | .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode), | |
41 | .key_offset = offsetof(struct net_bridge_mdb_entry, addr), | |
42 | .key_len = sizeof(struct br_ip), | |
43 | .automatic_shrinking = true, | |
19e3a9c9 NA |
44 | }; |
45 | ||
085b53c8 NA |
46 | static const struct rhashtable_params br_sg_port_rht_params = { |
47 | .head_offset = offsetof(struct net_bridge_port_group, rhnode), | |
48 | .key_offset = offsetof(struct net_bridge_port_group, key), | |
49 | .key_len = sizeof(struct net_bridge_port_group_sg_key), | |
50 | .automatic_shrinking = true, | |
51 | }; | |
52 | ||
adc47037 | 53 | static void br_multicast_start_querier(struct net_bridge_mcast *brmctx, |
90010b36 | 54 | struct bridge_mcast_own_query *query); |
adc47037 NA |
55 | static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx, |
56 | struct net_bridge_mcast_port *pmctx); | |
57 | static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx, | |
58 | struct net_bridge_mcast_port *pmctx, | |
bc8c20ac | 59 | __be32 group, |
6db6f0ea FF |
60 | __u16 vid, |
61 | const unsigned char *src); | |
42c11ccf | 62 | static void br_multicast_port_group_rexmit(struct timer_list *t); |
6db6f0ea | 63 | |
ed2d3597 | 64 | static void |
adc47037 NA |
65 | br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted); |
66 | static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx, | |
67 | struct net_bridge_mcast_port *pmctx); | |
30515832 | 68 | #if IS_ENABLED(CONFIG_IPV6) |
adc47037 NA |
69 | static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx, |
70 | struct net_bridge_mcast_port *pmctx, | |
bc8c20ac | 71 | const struct in6_addr *group, |
6db6f0ea | 72 | __u16 vid, const unsigned char *src); |
bc8c20ac | 73 | #endif |
b0812368 | 74 | static struct net_bridge_port_group * |
adc47037 NA |
75 | __br_multicast_add_group(struct net_bridge_mcast *brmctx, |
76 | struct net_bridge_mcast_port *pmctx, | |
b0812368 NA |
77 | struct br_ip *group, |
78 | const unsigned char *src, | |
79 | u8 filter_mode, | |
9116ffbf NA |
80 | bool igmpv2_mldv1, |
81 | bool blocked); | |
8266a049 NA |
82 | static void br_multicast_find_del_pg(struct net_bridge *br, |
83 | struct net_bridge_port_group *pg); | |
613d61db | 84 | static void __br_multicast_stop(struct net_bridge_mcast *brmctx); |
c83b8fab | 85 | |
c832962a OM |
86 | static int br_mc_disabled_update(struct net_device *dev, bool value, |
87 | struct netlink_ext_ack *extack); | |
88 | ||
085b53c8 NA |
89 | static struct net_bridge_port_group * |
90 | br_sg_port_find(struct net_bridge *br, | |
91 | struct net_bridge_port_group_sg_key *sg_p) | |
92 | { | |
93 | lockdep_assert_held_once(&br->multicast_lock); | |
94 | ||
95 | return rhashtable_lookup_fast(&br->sg_port_tbl, sg_p, | |
96 | br_sg_port_rht_params); | |
97 | } | |
98 | ||
19e3a9c9 NA |
99 | static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br, |
100 | struct br_ip *dst) | |
08b202b6 | 101 | { |
19e3a9c9 | 102 | return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params); |
08b202b6 | 103 | } |
08b202b6 | 104 | |
19e3a9c9 NA |
105 | struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br, |
106 | struct br_ip *dst) | |
eb1d1641 | 107 | { |
19e3a9c9 | 108 | struct net_bridge_mdb_entry *ent; |
eb1d1641 | 109 | |
19e3a9c9 | 110 | lockdep_assert_held_once(&br->multicast_lock); |
eb1d1641 | 111 | |
19e3a9c9 NA |
112 | rcu_read_lock(); |
113 | ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params); | |
114 | rcu_read_unlock(); | |
7f285fa7 | 115 | |
19e3a9c9 | 116 | return ent; |
7f285fa7 HX |
117 | } |
118 | ||
19e3a9c9 NA |
119 | static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br, |
120 | __be32 dst, __u16 vid) | |
eb1d1641 | 121 | { |
8ef2a9a5 YH |
122 | struct br_ip br_dst; |
123 | ||
19e3a9c9 | 124 | memset(&br_dst, 0, sizeof(br_dst)); |
eab3227b | 125 | br_dst.dst.ip4 = dst; |
8ef2a9a5 | 126 | br_dst.proto = htons(ETH_P_IP); |
b0e9a30d | 127 | br_dst.vid = vid; |
0821ec55 | 128 | |
19e3a9c9 | 129 | return br_mdb_ip_get(br, &br_dst); |
8ef2a9a5 YH |
130 | } |
131 | ||
dfd56b8b | 132 | #if IS_ENABLED(CONFIG_IPV6) |
19e3a9c9 NA |
133 | static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br, |
134 | const struct in6_addr *dst, | |
135 | __u16 vid) | |
08b202b6 YH |
136 | { |
137 | struct br_ip br_dst; | |
0821ec55 | 138 | |
19e3a9c9 | 139 | memset(&br_dst, 0, sizeof(br_dst)); |
eab3227b | 140 | br_dst.dst.ip6 = *dst; |
08b202b6 | 141 | br_dst.proto = htons(ETH_P_IPV6); |
b0e9a30d | 142 | br_dst.vid = vid; |
08b202b6 | 143 | |
19e3a9c9 | 144 | return br_mdb_ip_get(br, &br_dst); |
08b202b6 YH |
145 | } |
146 | #endif | |
147 | ||
adc47037 | 148 | struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, |
fbca58a2 | 149 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 150 | { |
adc47037 | 151 | struct net_bridge *br = brmctx->br; |
8ef2a9a5 YH |
152 | struct br_ip ip; |
153 | ||
4cdd0d10 NA |
154 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || |
155 | br_multicast_ctx_vlan_global_disabled(brmctx)) | |
eb1d1641 HX |
156 | return NULL; |
157 | ||
8ef2a9a5 | 158 | if (BR_INPUT_SKB_CB(skb)->igmp) |
eb1d1641 HX |
159 | return NULL; |
160 | ||
19e3a9c9 | 161 | memset(&ip, 0, sizeof(ip)); |
8ef2a9a5 | 162 | ip.proto = skb->protocol; |
fbca58a2 | 163 | ip.vid = vid; |
8ef2a9a5 | 164 | |
eb1d1641 HX |
165 | switch (skb->protocol) { |
166 | case htons(ETH_P_IP): | |
eab3227b | 167 | ip.dst.ip4 = ip_hdr(skb)->daddr; |
adc47037 | 168 | if (brmctx->multicast_igmp_version == 3) { |
7d07a68c NA |
169 | struct net_bridge_mdb_entry *mdb; |
170 | ||
171 | ip.src.ip4 = ip_hdr(skb)->saddr; | |
172 | mdb = br_mdb_ip_get_rcu(br, &ip); | |
173 | if (mdb) | |
174 | return mdb; | |
175 | ip.src.ip4 = 0; | |
176 | } | |
8ef2a9a5 | 177 | break; |
dfd56b8b | 178 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 179 | case htons(ETH_P_IPV6): |
eab3227b | 180 | ip.dst.ip6 = ipv6_hdr(skb)->daddr; |
adc47037 | 181 | if (brmctx->multicast_mld_version == 2) { |
7d07a68c NA |
182 | struct net_bridge_mdb_entry *mdb; |
183 | ||
184 | ip.src.ip6 = ipv6_hdr(skb)->saddr; | |
185 | mdb = br_mdb_ip_get_rcu(br, &ip); | |
186 | if (mdb) | |
187 | return mdb; | |
188 | memset(&ip.src.ip6, 0, sizeof(ip.src.ip6)); | |
189 | } | |
08b202b6 YH |
190 | break; |
191 | #endif | |
8ef2a9a5 | 192 | default: |
955062b0 NA |
193 | ip.proto = 0; |
194 | ether_addr_copy(ip.dst.mac_addr, eth_hdr(skb)->h_dest); | |
eb1d1641 HX |
195 | } |
196 | ||
19e3a9c9 | 197 | return br_mdb_ip_get_rcu(br, &ip); |
eb1d1641 HX |
198 | } |
199 | ||
74edfd48 NA |
200 | /* IMPORTANT: this function must be used only when the contexts cannot be |
201 | * passed down (e.g. timer) and must be used for read-only purposes because | |
202 | * the vlan snooping option can change, so it can return any context | |
203 | * (non-vlan or vlan). Its initial intended purpose is to read timer values | |
204 | * from the *current* context based on the option. At worst that could lead | |
205 | * to inconsistent timers when the contexts are changed, i.e. src timer | |
206 | * which needs to re-arm with a specific delay taken from the old context | |
207 | */ | |
208 | static struct net_bridge_mcast_port * | |
209 | br_multicast_pg_to_port_ctx(const struct net_bridge_port_group *pg) | |
210 | { | |
211 | struct net_bridge_mcast_port *pmctx = &pg->key.port->multicast_ctx; | |
212 | struct net_bridge_vlan *vlan; | |
213 | ||
214 | lockdep_assert_held_once(&pg->key.port->br->multicast_lock); | |
215 | ||
216 | /* if vlan snooping is disabled use the port's multicast context */ | |
217 | if (!pg->key.addr.vid || | |
218 | !br_opt_get(pg->key.port->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) | |
219 | goto out; | |
220 | ||
221 | /* locking is tricky here, due to different rules for multicast and | |
222 | * vlans we need to take rcu to find the vlan and make sure it has | |
223 | * the BR_VLFLAG_MCAST_ENABLED flag set, it can only change under | |
224 | * multicast_lock which must be already held here, so the vlan's pmctx | |
225 | * can safely be used on return | |
226 | */ | |
227 | rcu_read_lock(); | |
3f0d14ef | 228 | vlan = br_vlan_find(nbp_vlan_group_rcu(pg->key.port), pg->key.addr.vid); |
74edfd48 NA |
229 | if (vlan && !br_multicast_port_ctx_vlan_disabled(&vlan->port_mcast_ctx)) |
230 | pmctx = &vlan->port_mcast_ctx; | |
231 | else | |
232 | pmctx = NULL; | |
233 | rcu_read_unlock(); | |
234 | out: | |
235 | return pmctx; | |
236 | } | |
237 | ||
b57e8d87 PM |
238 | static struct net_bridge_mcast_port * |
239 | br_multicast_port_vid_to_port_ctx(struct net_bridge_port *port, u16 vid) | |
240 | { | |
241 | struct net_bridge_mcast_port *pmctx = NULL; | |
242 | struct net_bridge_vlan *vlan; | |
243 | ||
244 | lockdep_assert_held_once(&port->br->multicast_lock); | |
245 | ||
246 | if (!br_opt_get(port->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) | |
247 | return NULL; | |
248 | ||
249 | /* Take RCU to access the vlan. */ | |
250 | rcu_read_lock(); | |
251 | ||
252 | vlan = br_vlan_find(nbp_vlan_group_rcu(port), vid); | |
253 | if (vlan && !br_multicast_port_ctx_vlan_disabled(&vlan->port_mcast_ctx)) | |
254 | pmctx = &vlan->port_mcast_ctx; | |
255 | ||
256 | rcu_read_unlock(); | |
257 | ||
258 | return pmctx; | |
259 | } | |
260 | ||
4cdd0d10 NA |
261 | /* when snooping we need to check if the contexts should be used |
262 | * in the following order: | |
263 | * - if pmctx is non-NULL (port), check if it should be used | |
264 | * - if pmctx is NULL (bridge), check if brmctx should be used | |
265 | */ | |
266 | static bool | |
267 | br_multicast_ctx_should_use(const struct net_bridge_mcast *brmctx, | |
268 | const struct net_bridge_mcast_port *pmctx) | |
269 | { | |
270 | if (!netif_running(brmctx->br->dev)) | |
271 | return false; | |
272 | ||
273 | if (pmctx) | |
274 | return !br_multicast_port_ctx_state_disabled(pmctx); | |
275 | else | |
276 | return !br_multicast_ctx_vlan_disabled(brmctx); | |
277 | } | |
278 | ||
b0812368 NA |
279 | static bool br_port_group_equal(struct net_bridge_port_group *p, |
280 | struct net_bridge_port *port, | |
281 | const unsigned char *src) | |
282 | { | |
283 | if (p->key.port != port) | |
284 | return false; | |
285 | ||
286 | if (!(port->flags & BR_MULTICAST_TO_UNICAST)) | |
287 | return true; | |
288 | ||
289 | return ether_addr_equal(src, p->eth_addr); | |
290 | } | |
291 | ||
adc47037 NA |
292 | static void __fwd_add_star_excl(struct net_bridge_mcast_port *pmctx, |
293 | struct net_bridge_port_group *pg, | |
8266a049 NA |
294 | struct br_ip *sg_ip) |
295 | { | |
296 | struct net_bridge_port_group_sg_key sg_key; | |
8266a049 | 297 | struct net_bridge_port_group *src_pg; |
adc47037 | 298 | struct net_bridge_mcast *brmctx; |
8266a049 NA |
299 | |
300 | memset(&sg_key, 0, sizeof(sg_key)); | |
7b54aaaf | 301 | brmctx = br_multicast_port_ctx_get_global(pmctx); |
8266a049 NA |
302 | sg_key.port = pg->key.port; |
303 | sg_key.addr = *sg_ip; | |
adc47037 | 304 | if (br_sg_port_find(brmctx->br, &sg_key)) |
8266a049 NA |
305 | return; |
306 | ||
adc47037 NA |
307 | src_pg = __br_multicast_add_group(brmctx, pmctx, |
308 | sg_ip, pg->eth_addr, | |
9116ffbf | 309 | MCAST_INCLUDE, false, false); |
8266a049 NA |
310 | if (IS_ERR_OR_NULL(src_pg) || |
311 | src_pg->rt_protocol != RTPROT_KERNEL) | |
312 | return; | |
313 | ||
314 | src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL; | |
315 | } | |
316 | ||
317 | static void __fwd_del_star_excl(struct net_bridge_port_group *pg, | |
318 | struct br_ip *sg_ip) | |
319 | { | |
320 | struct net_bridge_port_group_sg_key sg_key; | |
321 | struct net_bridge *br = pg->key.port->br; | |
322 | struct net_bridge_port_group *src_pg; | |
323 | ||
324 | memset(&sg_key, 0, sizeof(sg_key)); | |
325 | sg_key.port = pg->key.port; | |
326 | sg_key.addr = *sg_ip; | |
327 | src_pg = br_sg_port_find(br, &sg_key); | |
328 | if (!src_pg || !(src_pg->flags & MDB_PG_FLAGS_STAR_EXCL) || | |
329 | src_pg->rt_protocol != RTPROT_KERNEL) | |
330 | return; | |
331 | ||
332 | br_multicast_find_del_pg(br, src_pg); | |
333 | } | |
334 | ||
335 | /* When a port group transitions to (or is added as) EXCLUDE we need to add it | |
336 | * to all other ports' S,G entries which are not blocked by the current group | |
337 | * for proper replication, the assumption is that any S,G blocked entries | |
338 | * are already added so the S,G,port lookup should skip them. | |
339 | * When a port group transitions from EXCLUDE -> INCLUDE mode or is being | |
340 | * deleted we need to remove it from all ports' S,G entries where it was | |
341 | * automatically installed before (i.e. where it's MDB_PG_FLAGS_STAR_EXCL). | |
342 | */ | |
343 | void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, | |
344 | u8 filter_mode) | |
345 | { | |
346 | struct net_bridge *br = pg->key.port->br; | |
347 | struct net_bridge_port_group *pg_lst; | |
adc47037 | 348 | struct net_bridge_mcast_port *pmctx; |
8266a049 NA |
349 | struct net_bridge_mdb_entry *mp; |
350 | struct br_ip sg_ip; | |
351 | ||
352 | if (WARN_ON(!br_multicast_is_star_g(&pg->key.addr))) | |
353 | return; | |
354 | ||
355 | mp = br_mdb_ip_get(br, &pg->key.addr); | |
356 | if (!mp) | |
357 | return; | |
eb1593a0 NA |
358 | pmctx = br_multicast_pg_to_port_ctx(pg); |
359 | if (!pmctx) | |
360 | return; | |
8266a049 NA |
361 | |
362 | memset(&sg_ip, 0, sizeof(sg_ip)); | |
363 | sg_ip = pg->key.addr; | |
7b54aaaf | 364 | |
8266a049 NA |
365 | for (pg_lst = mlock_dereference(mp->ports, br); |
366 | pg_lst; | |
367 | pg_lst = mlock_dereference(pg_lst->next, br)) { | |
368 | struct net_bridge_group_src *src_ent; | |
369 | ||
370 | if (pg_lst == pg) | |
371 | continue; | |
372 | hlist_for_each_entry(src_ent, &pg_lst->src_list, node) { | |
373 | if (!(src_ent->flags & BR_SGRP_F_INSTALLED)) | |
374 | continue; | |
375 | sg_ip.src = src_ent->addr.src; | |
376 | switch (filter_mode) { | |
377 | case MCAST_INCLUDE: | |
378 | __fwd_del_star_excl(pg, &sg_ip); | |
379 | break; | |
380 | case MCAST_EXCLUDE: | |
adc47037 | 381 | __fwd_add_star_excl(pmctx, pg, &sg_ip); |
8266a049 NA |
382 | break; |
383 | } | |
384 | } | |
385 | } | |
386 | } | |
387 | ||
094b82fd NA |
388 | /* called when adding a new S,G with host_joined == false by default */ |
389 | static void br_multicast_sg_host_state(struct net_bridge_mdb_entry *star_mp, | |
390 | struct net_bridge_port_group *sg) | |
391 | { | |
392 | struct net_bridge_mdb_entry *sg_mp; | |
393 | ||
394 | if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr))) | |
395 | return; | |
396 | if (!star_mp->host_joined) | |
397 | return; | |
398 | ||
399 | sg_mp = br_mdb_ip_get(star_mp->br, &sg->key.addr); | |
400 | if (!sg_mp) | |
401 | return; | |
402 | sg_mp->host_joined = true; | |
403 | } | |
404 | ||
405 | /* set the host_joined state of all of *,G's S,G entries */ | |
406 | static void br_multicast_star_g_host_state(struct net_bridge_mdb_entry *star_mp) | |
407 | { | |
408 | struct net_bridge *br = star_mp->br; | |
409 | struct net_bridge_mdb_entry *sg_mp; | |
410 | struct net_bridge_port_group *pg; | |
411 | struct br_ip sg_ip; | |
412 | ||
413 | if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr))) | |
414 | return; | |
415 | ||
416 | memset(&sg_ip, 0, sizeof(sg_ip)); | |
417 | sg_ip = star_mp->addr; | |
418 | for (pg = mlock_dereference(star_mp->ports, br); | |
419 | pg; | |
420 | pg = mlock_dereference(pg->next, br)) { | |
421 | struct net_bridge_group_src *src_ent; | |
422 | ||
423 | hlist_for_each_entry(src_ent, &pg->src_list, node) { | |
424 | if (!(src_ent->flags & BR_SGRP_F_INSTALLED)) | |
425 | continue; | |
426 | sg_ip.src = src_ent->addr.src; | |
427 | sg_mp = br_mdb_ip_get(br, &sg_ip); | |
428 | if (!sg_mp) | |
429 | continue; | |
430 | sg_mp->host_joined = star_mp->host_joined; | |
431 | } | |
432 | } | |
433 | } | |
434 | ||
8266a049 NA |
435 | static void br_multicast_sg_del_exclude_ports(struct net_bridge_mdb_entry *sgmp) |
436 | { | |
437 | struct net_bridge_port_group __rcu **pp; | |
438 | struct net_bridge_port_group *p; | |
439 | ||
440 | /* *,G exclude ports are only added to S,G entries */ | |
441 | if (WARN_ON(br_multicast_is_star_g(&sgmp->addr))) | |
442 | return; | |
443 | ||
444 | /* we need the STAR_EXCLUDE ports if there are non-STAR_EXCLUDE ports | |
445 | * we should ignore perm entries since they're managed by user-space | |
446 | */ | |
447 | for (pp = &sgmp->ports; | |
448 | (p = mlock_dereference(*pp, sgmp->br)) != NULL; | |
449 | pp = &p->next) | |
450 | if (!(p->flags & (MDB_PG_FLAGS_STAR_EXCL | | |
451 | MDB_PG_FLAGS_PERMANENT))) | |
452 | return; | |
453 | ||
094b82fd NA |
454 | /* currently the host can only have joined the *,G which means |
455 | * we treat it as EXCLUDE {}, so for an S,G it's considered a | |
456 | * STAR_EXCLUDE entry and we can safely leave it | |
457 | */ | |
458 | sgmp->host_joined = false; | |
459 | ||
8266a049 NA |
460 | for (pp = &sgmp->ports; |
461 | (p = mlock_dereference(*pp, sgmp->br)) != NULL;) { | |
462 | if (!(p->flags & MDB_PG_FLAGS_PERMANENT)) | |
463 | br_multicast_del_pg(sgmp, p, pp); | |
464 | else | |
465 | pp = &p->next; | |
466 | } | |
467 | } | |
468 | ||
469 | void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, | |
470 | struct net_bridge_port_group *sg) | |
471 | { | |
472 | struct net_bridge_port_group_sg_key sg_key; | |
473 | struct net_bridge *br = star_mp->br; | |
adc47037 | 474 | struct net_bridge_mcast_port *pmctx; |
8266a049 | 475 | struct net_bridge_port_group *pg; |
adc47037 | 476 | struct net_bridge_mcast *brmctx; |
8266a049 NA |
477 | |
478 | if (WARN_ON(br_multicast_is_star_g(&sg->key.addr))) | |
479 | return; | |
480 | if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr))) | |
481 | return; | |
482 | ||
094b82fd | 483 | br_multicast_sg_host_state(star_mp, sg); |
8266a049 NA |
484 | memset(&sg_key, 0, sizeof(sg_key)); |
485 | sg_key.addr = sg->key.addr; | |
486 | /* we need to add all exclude ports to the S,G */ | |
487 | for (pg = mlock_dereference(star_mp->ports, br); | |
488 | pg; | |
489 | pg = mlock_dereference(pg->next, br)) { | |
490 | struct net_bridge_port_group *src_pg; | |
491 | ||
492 | if (pg == sg || pg->filter_mode == MCAST_INCLUDE) | |
493 | continue; | |
494 | ||
495 | sg_key.port = pg->key.port; | |
496 | if (br_sg_port_find(br, &sg_key)) | |
497 | continue; | |
498 | ||
eb1593a0 NA |
499 | pmctx = br_multicast_pg_to_port_ctx(pg); |
500 | if (!pmctx) | |
501 | continue; | |
502 | brmctx = br_multicast_port_ctx_get_global(pmctx); | |
503 | ||
adc47037 | 504 | src_pg = __br_multicast_add_group(brmctx, pmctx, |
8266a049 NA |
505 | &sg->key.addr, |
506 | sg->eth_addr, | |
9116ffbf | 507 | MCAST_INCLUDE, false, false); |
8266a049 NA |
508 | if (IS_ERR_OR_NULL(src_pg) || |
509 | src_pg->rt_protocol != RTPROT_KERNEL) | |
510 | continue; | |
511 | src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL; | |
512 | } | |
513 | } | |
514 | ||
b0812368 NA |
515 | static void br_multicast_fwd_src_add(struct net_bridge_group_src *src) |
516 | { | |
8266a049 | 517 | struct net_bridge_mdb_entry *star_mp; |
adc47037 | 518 | struct net_bridge_mcast_port *pmctx; |
b0812368 | 519 | struct net_bridge_port_group *sg; |
adc47037 | 520 | struct net_bridge_mcast *brmctx; |
b0812368 NA |
521 | struct br_ip sg_ip; |
522 | ||
523 | if (src->flags & BR_SGRP_F_INSTALLED) | |
524 | return; | |
525 | ||
526 | memset(&sg_ip, 0, sizeof(sg_ip)); | |
eb1593a0 NA |
527 | pmctx = br_multicast_pg_to_port_ctx(src->pg); |
528 | if (!pmctx) | |
529 | return; | |
7b54aaaf | 530 | brmctx = br_multicast_port_ctx_get_global(pmctx); |
b0812368 NA |
531 | sg_ip = src->pg->key.addr; |
532 | sg_ip.src = src->addr.src; | |
adc47037 NA |
533 | |
534 | sg = __br_multicast_add_group(brmctx, pmctx, &sg_ip, | |
9116ffbf NA |
535 | src->pg->eth_addr, MCAST_INCLUDE, false, |
536 | !timer_pending(&src->timer)); | |
b0812368 NA |
537 | if (IS_ERR_OR_NULL(sg)) |
538 | return; | |
539 | src->flags |= BR_SGRP_F_INSTALLED; | |
8266a049 | 540 | sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL; |
b0812368 NA |
541 | |
542 | /* if it was added by user-space as perm we can skip next steps */ | |
543 | if (sg->rt_protocol != RTPROT_KERNEL && | |
544 | (sg->flags & MDB_PG_FLAGS_PERMANENT)) | |
545 | return; | |
546 | ||
547 | /* the kernel is now responsible for removing this S,G */ | |
548 | del_timer(&sg->timer); | |
8266a049 NA |
549 | star_mp = br_mdb_ip_get(src->br, &src->pg->key.addr); |
550 | if (!star_mp) | |
551 | return; | |
552 | ||
553 | br_multicast_sg_add_exclude_ports(star_mp, sg); | |
b0812368 NA |
554 | } |
555 | ||
d5a10222 NA |
556 | static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src, |
557 | bool fastleave) | |
b0812368 NA |
558 | { |
559 | struct net_bridge_port_group *p, *pg = src->pg; | |
560 | struct net_bridge_port_group __rcu **pp; | |
561 | struct net_bridge_mdb_entry *mp; | |
562 | struct br_ip sg_ip; | |
563 | ||
564 | memset(&sg_ip, 0, sizeof(sg_ip)); | |
565 | sg_ip = pg->key.addr; | |
566 | sg_ip.src = src->addr.src; | |
567 | ||
568 | mp = br_mdb_ip_get(src->br, &sg_ip); | |
569 | if (!mp) | |
570 | return; | |
571 | ||
572 | for (pp = &mp->ports; | |
573 | (p = mlock_dereference(*pp, src->br)) != NULL; | |
574 | pp = &p->next) { | |
575 | if (!br_port_group_equal(p, pg->key.port, pg->eth_addr)) | |
576 | continue; | |
577 | ||
578 | if (p->rt_protocol != RTPROT_KERNEL && | |
a01ecb17 IS |
579 | (p->flags & MDB_PG_FLAGS_PERMANENT) && |
580 | !(src->flags & BR_SGRP_F_USER_ADDED)) | |
b0812368 NA |
581 | break; |
582 | ||
d5a10222 NA |
583 | if (fastleave) |
584 | p->flags |= MDB_PG_FLAGS_FAST_LEAVE; | |
b0812368 NA |
585 | br_multicast_del_pg(mp, p, pp); |
586 | break; | |
587 | } | |
588 | src->flags &= ~BR_SGRP_F_INSTALLED; | |
589 | } | |
590 | ||
9116ffbf | 591 | /* install S,G and based on src's timer enable or disable forwarding */ |
b0812368 NA |
592 | static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src) |
593 | { | |
9116ffbf NA |
594 | struct net_bridge_port_group_sg_key sg_key; |
595 | struct net_bridge_port_group *sg; | |
596 | u8 old_flags; | |
597 | ||
b0812368 | 598 | br_multicast_fwd_src_add(src); |
9116ffbf NA |
599 | |
600 | memset(&sg_key, 0, sizeof(sg_key)); | |
601 | sg_key.addr = src->pg->key.addr; | |
602 | sg_key.addr.src = src->addr.src; | |
603 | sg_key.port = src->pg->key.port; | |
604 | ||
605 | sg = br_sg_port_find(src->br, &sg_key); | |
606 | if (!sg || (sg->flags & MDB_PG_FLAGS_PERMANENT)) | |
607 | return; | |
608 | ||
609 | old_flags = sg->flags; | |
610 | if (timer_pending(&src->timer)) | |
611 | sg->flags &= ~MDB_PG_FLAGS_BLOCKED; | |
612 | else | |
613 | sg->flags |= MDB_PG_FLAGS_BLOCKED; | |
614 | ||
615 | if (old_flags != sg->flags) { | |
616 | struct net_bridge_mdb_entry *sg_mp; | |
617 | ||
618 | sg_mp = br_mdb_ip_get(src->br, &sg_key.addr); | |
619 | if (!sg_mp) | |
620 | return; | |
621 | br_mdb_notify(src->br->dev, sg_mp, sg, RTM_NEWMDB); | |
622 | } | |
b0812368 NA |
623 | } |
624 | ||
e12cec65 NA |
625 | static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc) |
626 | { | |
627 | struct net_bridge_mdb_entry *mp; | |
628 | ||
629 | mp = container_of(gc, struct net_bridge_mdb_entry, mcast_gc); | |
630 | WARN_ON(!hlist_unhashed(&mp->mdb_node)); | |
631 | WARN_ON(mp->ports); | |
632 | ||
292a089d | 633 | timer_shutdown_sync(&mp->timer); |
e12cec65 NA |
634 | kfree_rcu(mp, rcu); |
635 | } | |
636 | ||
637 | static void br_multicast_del_mdb_entry(struct net_bridge_mdb_entry *mp) | |
638 | { | |
639 | struct net_bridge *br = mp->br; | |
640 | ||
641 | rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode, | |
642 | br_mdb_rht_params); | |
643 | hlist_del_init_rcu(&mp->mdb_node); | |
644 | hlist_add_head(&mp->mcast_gc.gc_node, &br->mcast_gc_list); | |
645 | queue_work(system_long_wq, &br->mcast_gc_work); | |
646 | } | |
647 | ||
88c1f37f | 648 | static void br_multicast_group_expired(struct timer_list *t) |
eb1d1641 | 649 | { |
88c1f37f | 650 | struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer); |
eb1d1641 | 651 | struct net_bridge *br = mp->br; |
eb1d1641 HX |
652 | |
653 | spin_lock(&br->multicast_lock); | |
b0812368 NA |
654 | if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) || |
655 | timer_pending(&mp->timer)) | |
eb1d1641 HX |
656 | goto out; |
657 | ||
1bc844ee | 658 | br_multicast_host_leave(mp, true); |
eb1d1641 HX |
659 | |
660 | if (mp->ports) | |
661 | goto out; | |
e12cec65 NA |
662 | br_multicast_del_mdb_entry(mp); |
663 | out: | |
664 | spin_unlock(&br->multicast_lock); | |
665 | } | |
eb1d1641 | 666 | |
e12cec65 NA |
667 | static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc) |
668 | { | |
669 | struct net_bridge_group_src *src; | |
eb1d1641 | 670 | |
e12cec65 NA |
671 | src = container_of(gc, struct net_bridge_group_src, mcast_gc); |
672 | WARN_ON(!hlist_unhashed(&src->node)); | |
eb1d1641 | 673 | |
292a089d | 674 | timer_shutdown_sync(&src->timer); |
e12cec65 | 675 | kfree_rcu(src, rcu); |
eb1d1641 HX |
676 | } |
677 | ||
083e3534 | 678 | void __br_multicast_del_group_src(struct net_bridge_group_src *src) |
8b671779 | 679 | { |
085b53c8 | 680 | struct net_bridge *br = src->pg->key.port->br; |
8b671779 NA |
681 | |
682 | hlist_del_init_rcu(&src->node); | |
683 | src->pg->src_ents--; | |
e12cec65 NA |
684 | hlist_add_head(&src->mcast_gc.gc_node, &br->mcast_gc_list); |
685 | queue_work(system_long_wq, &br->mcast_gc_work); | |
686 | } | |
687 | ||
083e3534 IS |
688 | void br_multicast_del_group_src(struct net_bridge_group_src *src, |
689 | bool fastleave) | |
690 | { | |
691 | br_multicast_fwd_src_remove(src, fastleave); | |
692 | __br_multicast_del_group_src(src); | |
693 | } | |
694 | ||
b57e8d87 PM |
695 | static int |
696 | br_multicast_port_ngroups_inc_one(struct net_bridge_mcast_port *pmctx, | |
697 | struct netlink_ext_ack *extack, | |
698 | const char *what) | |
699 | { | |
700 | u32 max = READ_ONCE(pmctx->mdb_max_entries); | |
701 | u32 n = READ_ONCE(pmctx->mdb_n_entries); | |
702 | ||
703 | if (max && n >= max) { | |
704 | NL_SET_ERR_MSG_FMT_MOD(extack, "%s is already in %u groups, and mcast_max_groups=%u", | |
705 | what, n, max); | |
706 | return -E2BIG; | |
707 | } | |
708 | ||
709 | WRITE_ONCE(pmctx->mdb_n_entries, n + 1); | |
710 | return 0; | |
711 | } | |
712 | ||
713 | static void br_multicast_port_ngroups_dec_one(struct net_bridge_mcast_port *pmctx) | |
714 | { | |
715 | u32 n = READ_ONCE(pmctx->mdb_n_entries); | |
716 | ||
717 | WARN_ON_ONCE(n == 0); | |
718 | WRITE_ONCE(pmctx->mdb_n_entries, n - 1); | |
719 | } | |
720 | ||
721 | static int br_multicast_port_ngroups_inc(struct net_bridge_port *port, | |
722 | const struct br_ip *group, | |
723 | struct netlink_ext_ack *extack) | |
724 | { | |
725 | struct net_bridge_mcast_port *pmctx; | |
726 | int err; | |
727 | ||
728 | lockdep_assert_held_once(&port->br->multicast_lock); | |
729 | ||
730 | /* Always count on the port context. */ | |
731 | err = br_multicast_port_ngroups_inc_one(&port->multicast_ctx, extack, | |
732 | "Port"); | |
733 | if (err) { | |
734 | trace_br_mdb_full(port->dev, group); | |
735 | return err; | |
736 | } | |
737 | ||
738 | /* Only count on the VLAN context if VID is given, and if snooping on | |
739 | * that VLAN is enabled. | |
740 | */ | |
741 | if (!group->vid) | |
742 | return 0; | |
743 | ||
744 | pmctx = br_multicast_port_vid_to_port_ctx(port, group->vid); | |
745 | if (!pmctx) | |
746 | return 0; | |
747 | ||
748 | err = br_multicast_port_ngroups_inc_one(pmctx, extack, "Port-VLAN"); | |
749 | if (err) { | |
750 | trace_br_mdb_full(port->dev, group); | |
751 | goto dec_one_out; | |
752 | } | |
753 | ||
754 | return 0; | |
755 | ||
756 | dec_one_out: | |
757 | br_multicast_port_ngroups_dec_one(&port->multicast_ctx); | |
758 | return err; | |
759 | } | |
760 | ||
761 | static void br_multicast_port_ngroups_dec(struct net_bridge_port *port, u16 vid) | |
762 | { | |
763 | struct net_bridge_mcast_port *pmctx; | |
764 | ||
765 | lockdep_assert_held_once(&port->br->multicast_lock); | |
766 | ||
767 | if (vid) { | |
768 | pmctx = br_multicast_port_vid_to_port_ctx(port, vid); | |
769 | if (pmctx) | |
770 | br_multicast_port_ngroups_dec_one(pmctx); | |
771 | } | |
772 | br_multicast_port_ngroups_dec_one(&port->multicast_ctx); | |
773 | } | |
774 | ||
a1aee20d PM |
775 | u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx) |
776 | { | |
777 | return READ_ONCE(pmctx->mdb_n_entries); | |
778 | } | |
779 | ||
780 | void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max) | |
781 | { | |
782 | WRITE_ONCE(pmctx->mdb_max_entries, max); | |
783 | } | |
784 | ||
785 | u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx) | |
786 | { | |
787 | return READ_ONCE(pmctx->mdb_max_entries); | |
788 | } | |
789 | ||
e12cec65 NA |
790 | static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc) |
791 | { | |
792 | struct net_bridge_port_group *pg; | |
793 | ||
794 | pg = container_of(gc, struct net_bridge_port_group, mcast_gc); | |
795 | WARN_ON(!hlist_unhashed(&pg->mglist)); | |
796 | WARN_ON(!hlist_empty(&pg->src_list)); | |
797 | ||
292a089d SRG |
798 | timer_shutdown_sync(&pg->rexmit_timer); |
799 | timer_shutdown_sync(&pg->timer); | |
e12cec65 | 800 | kfree_rcu(pg, rcu); |
8b671779 NA |
801 | } |
802 | ||
681590bd NA |
803 | void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, |
804 | struct net_bridge_port_group *pg, | |
805 | struct net_bridge_port_group __rcu **pp) | |
806 | { | |
085b53c8 | 807 | struct net_bridge *br = pg->key.port->br; |
8b671779 NA |
808 | struct net_bridge_group_src *ent; |
809 | struct hlist_node *tmp; | |
681590bd NA |
810 | |
811 | rcu_assign_pointer(*pp, pg->next); | |
812 | hlist_del_init(&pg->mglist); | |
baa74d39 | 813 | br_multicast_eht_clean_sets(pg); |
8b671779 | 814 | hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node) |
d5a10222 | 815 | br_multicast_del_group_src(ent, false); |
81f19838 | 816 | br_mdb_notify(br->dev, mp, pg, RTM_DELMDB); |
74705582 NA |
817 | if (!br_multicast_is_star_g(&mp->addr)) { |
818 | rhashtable_remove_fast(&br->sg_port_tbl, &pg->rhnode, | |
819 | br_sg_port_rht_params); | |
8266a049 | 820 | br_multicast_sg_del_exclude_ports(mp); |
74705582 | 821 | } else { |
8266a049 | 822 | br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE); |
74705582 | 823 | } |
b57e8d87 | 824 | br_multicast_port_ngroups_dec(pg->key.port, pg->key.addr.vid); |
e12cec65 NA |
825 | hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list); |
826 | queue_work(system_long_wq, &br->mcast_gc_work); | |
681590bd NA |
827 | |
828 | if (!mp->ports && !mp->host_joined && netif_running(br->dev)) | |
829 | mod_timer(&mp->timer, jiffies); | |
830 | } | |
831 | ||
832 | static void br_multicast_find_del_pg(struct net_bridge *br, | |
833 | struct net_bridge_port_group *pg) | |
eb1d1641 | 834 | { |
8b671779 | 835 | struct net_bridge_port_group __rcu **pp; |
eb1d1641 HX |
836 | struct net_bridge_mdb_entry *mp; |
837 | struct net_bridge_port_group *p; | |
e8051688 | 838 | |
085b53c8 | 839 | mp = br_mdb_ip_get(br, &pg->key.addr); |
eb1d1641 HX |
840 | if (WARN_ON(!mp)) |
841 | return; | |
842 | ||
e8051688 ED |
843 | for (pp = &mp->ports; |
844 | (p = mlock_dereference(*pp, br)) != NULL; | |
845 | pp = &p->next) { | |
eb1d1641 HX |
846 | if (p != pg) |
847 | continue; | |
848 | ||
681590bd | 849 | br_multicast_del_pg(mp, pg, pp); |
eb1d1641 HX |
850 | return; |
851 | } | |
852 | ||
853 | WARN_ON(1); | |
854 | } | |
855 | ||
88c1f37f | 856 | static void br_multicast_port_group_expired(struct timer_list *t) |
eb1d1641 | 857 | { |
88c1f37f | 858 | struct net_bridge_port_group *pg = from_timer(pg, t, timer); |
d6c33d67 | 859 | struct net_bridge_group_src *src_ent; |
085b53c8 | 860 | struct net_bridge *br = pg->key.port->br; |
d6c33d67 NA |
861 | struct hlist_node *tmp; |
862 | bool changed; | |
eb1d1641 HX |
863 | |
864 | spin_lock(&br->multicast_lock); | |
865 | if (!netif_running(br->dev) || timer_pending(&pg->timer) || | |
9d06b6d8 | 866 | hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT) |
eb1d1641 HX |
867 | goto out; |
868 | ||
d6c33d67 NA |
869 | changed = !!(pg->filter_mode == MCAST_EXCLUDE); |
870 | pg->filter_mode = MCAST_INCLUDE; | |
871 | hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) { | |
872 | if (!timer_pending(&src_ent->timer)) { | |
d5a10222 | 873 | br_multicast_del_group_src(src_ent, false); |
d6c33d67 NA |
874 | changed = true; |
875 | } | |
876 | } | |
877 | ||
878 | if (hlist_empty(&pg->src_list)) { | |
879 | br_multicast_find_del_pg(br, pg); | |
880 | } else if (changed) { | |
085b53c8 | 881 | struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr); |
eb1d1641 | 882 | |
8266a049 NA |
883 | if (changed && br_multicast_is_star_g(&pg->key.addr)) |
884 | br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE); | |
885 | ||
d6c33d67 NA |
886 | if (WARN_ON(!mp)) |
887 | goto out; | |
888 | br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB); | |
889 | } | |
eb1d1641 HX |
890 | out: |
891 | spin_unlock(&br->multicast_lock); | |
892 | } | |
893 | ||
e12cec65 NA |
894 | static void br_multicast_gc(struct hlist_head *head) |
895 | { | |
896 | struct net_bridge_mcast_gc *gcent; | |
897 | struct hlist_node *tmp; | |
898 | ||
899 | hlist_for_each_entry_safe(gcent, tmp, head, gc_node) { | |
900 | hlist_del_init(&gcent->gc_node); | |
901 | gcent->destroy(gcent); | |
902 | } | |
903 | } | |
904 | ||
615cc23e NA |
905 | static void __br_multicast_query_handle_vlan(struct net_bridge_mcast *brmctx, |
906 | struct net_bridge_mcast_port *pmctx, | |
907 | struct sk_buff *skb) | |
908 | { | |
909 | struct net_bridge_vlan *vlan = NULL; | |
910 | ||
911 | if (pmctx && br_multicast_port_ctx_is_vlan(pmctx)) | |
912 | vlan = pmctx->vlan; | |
913 | else if (br_multicast_ctx_is_vlan(brmctx)) | |
914 | vlan = brmctx->vlan; | |
915 | ||
916 | if (vlan && !(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED)) { | |
917 | u16 vlan_proto; | |
918 | ||
919 | if (br_vlan_get_proto(brmctx->br->dev, &vlan_proto) != 0) | |
920 | return; | |
921 | __vlan_hwaccel_put_tag(skb, htons(vlan_proto), vlan->vid); | |
922 | } | |
923 | } | |
924 | ||
adc47037 | 925 | static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge_mcast *brmctx, |
615cc23e | 926 | struct net_bridge_mcast_port *pmctx, |
438ef2d0 NA |
927 | struct net_bridge_port_group *pg, |
928 | __be32 ip_dst, __be32 group, | |
929 | bool with_srcs, bool over_lmqt, | |
42c11ccf NA |
930 | u8 sflag, u8 *igmp_type, |
931 | bool *need_rexmit) | |
eb1d1641 | 932 | { |
085b53c8 | 933 | struct net_bridge_port *p = pg ? pg->key.port : NULL; |
438ef2d0 NA |
934 | struct net_bridge_group_src *ent; |
935 | size_t pkt_size, igmp_hdr_size; | |
936 | unsigned long now = jiffies; | |
5e923585 | 937 | struct igmpv3_query *ihv3; |
438ef2d0 NA |
938 | void *csum_start = NULL; |
939 | __sum16 *csum = NULL; | |
eb1d1641 HX |
940 | struct sk_buff *skb; |
941 | struct igmphdr *ih; | |
942 | struct ethhdr *eth; | |
438ef2d0 | 943 | unsigned long lmqt; |
eb1d1641 | 944 | struct iphdr *iph; |
438ef2d0 | 945 | u16 lmqt_srcs = 0; |
eb1d1641 | 946 | |
5e923585 | 947 | igmp_hdr_size = sizeof(*ih); |
d3d065c0 | 948 | if (brmctx->multicast_igmp_version == 3) { |
5e923585 | 949 | igmp_hdr_size = sizeof(*ihv3); |
438ef2d0 | 950 | if (pg && with_srcs) { |
d3d065c0 NA |
951 | lmqt = now + (brmctx->multicast_last_member_interval * |
952 | brmctx->multicast_last_member_count); | |
438ef2d0 NA |
953 | hlist_for_each_entry(ent, &pg->src_list, node) { |
954 | if (over_lmqt == time_after(ent->timer.expires, | |
955 | lmqt) && | |
956 | ent->src_query_rexmit_cnt > 0) | |
957 | lmqt_srcs++; | |
958 | } | |
959 | ||
960 | if (!lmqt_srcs) | |
961 | return NULL; | |
962 | igmp_hdr_size += lmqt_srcs * sizeof(__be32); | |
963 | } | |
964 | } | |
965 | ||
966 | pkt_size = sizeof(*eth) + sizeof(*iph) + 4 + igmp_hdr_size; | |
967 | if ((p && pkt_size > p->dev->mtu) || | |
adc47037 | 968 | pkt_size > brmctx->br->dev->mtu) |
438ef2d0 NA |
969 | return NULL; |
970 | ||
adc47037 | 971 | skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size); |
eb1d1641 HX |
972 | if (!skb) |
973 | goto out; | |
974 | ||
615cc23e | 975 | __br_multicast_query_handle_vlan(brmctx, pmctx, skb); |
eb1d1641 HX |
976 | skb->protocol = htons(ETH_P_IP); |
977 | ||
978 | skb_reset_mac_header(skb); | |
979 | eth = eth_hdr(skb); | |
980 | ||
adc47037 | 981 | ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr); |
438ef2d0 | 982 | ip_eth_mc_map(ip_dst, eth->h_dest); |
eb1d1641 HX |
983 | eth->h_proto = htons(ETH_P_IP); |
984 | skb_put(skb, sizeof(*eth)); | |
985 | ||
986 | skb_set_network_header(skb, skb->len); | |
987 | iph = ip_hdr(skb); | |
438ef2d0 | 988 | iph->tot_len = htons(pkt_size - sizeof(*eth)); |
eb1d1641 HX |
989 | |
990 | iph->version = 4; | |
991 | iph->ihl = 6; | |
992 | iph->tos = 0xc0; | |
eb1d1641 HX |
993 | iph->id = 0; |
994 | iph->frag_off = htons(IP_DF); | |
995 | iph->ttl = 1; | |
996 | iph->protocol = IPPROTO_IGMP; | |
adc47037 NA |
997 | iph->saddr = br_opt_get(brmctx->br, BROPT_MULTICAST_QUERY_USE_IFADDR) ? |
998 | inet_select_addr(brmctx->br->dev, 0, RT_SCOPE_LINK) : 0; | |
438ef2d0 | 999 | iph->daddr = ip_dst; |
eb1d1641 HX |
1000 | ((u8 *)&iph[1])[0] = IPOPT_RA; |
1001 | ((u8 *)&iph[1])[1] = 4; | |
1002 | ((u8 *)&iph[1])[2] = 0; | |
1003 | ((u8 *)&iph[1])[3] = 0; | |
1004 | ip_send_check(iph); | |
1005 | skb_put(skb, 24); | |
1006 | ||
1007 | skb_set_transport_header(skb, skb->len); | |
1080ab95 | 1008 | *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY; |
eb1d1641 | 1009 | |
d3d065c0 | 1010 | switch (brmctx->multicast_igmp_version) { |
5e923585 NA |
1011 | case 2: |
1012 | ih = igmp_hdr(skb); | |
1013 | ih->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
d3d065c0 NA |
1014 | ih->code = (group ? brmctx->multicast_last_member_interval : |
1015 | brmctx->multicast_query_response_interval) / | |
5e923585 NA |
1016 | (HZ / IGMP_TIMER_SCALE); |
1017 | ih->group = group; | |
1018 | ih->csum = 0; | |
438ef2d0 NA |
1019 | csum = &ih->csum; |
1020 | csum_start = (void *)ih; | |
5e923585 NA |
1021 | break; |
1022 | case 3: | |
1023 | ihv3 = igmpv3_query_hdr(skb); | |
1024 | ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY; | |
d3d065c0 NA |
1025 | ihv3->code = (group ? brmctx->multicast_last_member_interval : |
1026 | brmctx->multicast_query_response_interval) / | |
5e923585 NA |
1027 | (HZ / IGMP_TIMER_SCALE); |
1028 | ihv3->group = group; | |
d3d065c0 | 1029 | ihv3->qqic = brmctx->multicast_query_interval / HZ; |
438ef2d0 | 1030 | ihv3->nsrcs = htons(lmqt_srcs); |
5e923585 | 1031 | ihv3->resv = 0; |
438ef2d0 | 1032 | ihv3->suppress = sflag; |
5e923585 NA |
1033 | ihv3->qrv = 2; |
1034 | ihv3->csum = 0; | |
438ef2d0 NA |
1035 | csum = &ihv3->csum; |
1036 | csum_start = (void *)ihv3; | |
1037 | if (!pg || !with_srcs) | |
1038 | break; | |
1039 | ||
1040 | lmqt_srcs = 0; | |
1041 | hlist_for_each_entry(ent, &pg->src_list, node) { | |
1042 | if (over_lmqt == time_after(ent->timer.expires, | |
1043 | lmqt) && | |
1044 | ent->src_query_rexmit_cnt > 0) { | |
deb96566 | 1045 | ihv3->srcs[lmqt_srcs++] = ent->addr.src.ip4; |
438ef2d0 | 1046 | ent->src_query_rexmit_cnt--; |
42c11ccf NA |
1047 | if (need_rexmit && ent->src_query_rexmit_cnt) |
1048 | *need_rexmit = true; | |
438ef2d0 NA |
1049 | } |
1050 | } | |
1051 | if (WARN_ON(lmqt_srcs != ntohs(ihv3->nsrcs))) { | |
1052 | kfree_skb(skb); | |
1053 | return NULL; | |
1054 | } | |
5e923585 NA |
1055 | break; |
1056 | } | |
1057 | ||
438ef2d0 NA |
1058 | if (WARN_ON(!csum || !csum_start)) { |
1059 | kfree_skb(skb); | |
1060 | return NULL; | |
1061 | } | |
1062 | ||
1063 | *csum = ip_compute_csum(csum_start, igmp_hdr_size); | |
5e923585 | 1064 | skb_put(skb, igmp_hdr_size); |
eb1d1641 HX |
1065 | __skb_pull(skb, sizeof(*eth)); |
1066 | ||
1067 | out: | |
1068 | return skb; | |
1069 | } | |
1070 | ||
dfd56b8b | 1071 | #if IS_ENABLED(CONFIG_IPV6) |
adc47037 | 1072 | static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge_mcast *brmctx, |
615cc23e | 1073 | struct net_bridge_mcast_port *pmctx, |
438ef2d0 NA |
1074 | struct net_bridge_port_group *pg, |
1075 | const struct in6_addr *ip6_dst, | |
1076 | const struct in6_addr *group, | |
1077 | bool with_srcs, bool over_llqt, | |
42c11ccf NA |
1078 | u8 sflag, u8 *igmp_type, |
1079 | bool *need_rexmit) | |
08b202b6 | 1080 | { |
085b53c8 | 1081 | struct net_bridge_port *p = pg ? pg->key.port : NULL; |
438ef2d0 NA |
1082 | struct net_bridge_group_src *ent; |
1083 | size_t pkt_size, mld_hdr_size; | |
1084 | unsigned long now = jiffies; | |
aa2ae3e7 | 1085 | struct mld2_query *mld2q; |
438ef2d0 | 1086 | void *csum_start = NULL; |
aa2ae3e7 | 1087 | unsigned long interval; |
438ef2d0 | 1088 | __sum16 *csum = NULL; |
08b202b6 YH |
1089 | struct ipv6hdr *ip6h; |
1090 | struct mld_msg *mldq; | |
aa2ae3e7 | 1091 | struct sk_buff *skb; |
438ef2d0 | 1092 | unsigned long llqt; |
08b202b6 | 1093 | struct ethhdr *eth; |
438ef2d0 | 1094 | u16 llqt_srcs = 0; |
08b202b6 | 1095 | u8 *hopopt; |
08b202b6 | 1096 | |
aa2ae3e7 | 1097 | mld_hdr_size = sizeof(*mldq); |
d3d065c0 | 1098 | if (brmctx->multicast_mld_version == 2) { |
aa2ae3e7 | 1099 | mld_hdr_size = sizeof(*mld2q); |
438ef2d0 | 1100 | if (pg && with_srcs) { |
d3d065c0 NA |
1101 | llqt = now + (brmctx->multicast_last_member_interval * |
1102 | brmctx->multicast_last_member_count); | |
438ef2d0 NA |
1103 | hlist_for_each_entry(ent, &pg->src_list, node) { |
1104 | if (over_llqt == time_after(ent->timer.expires, | |
1105 | llqt) && | |
1106 | ent->src_query_rexmit_cnt > 0) | |
1107 | llqt_srcs++; | |
1108 | } | |
1109 | ||
1110 | if (!llqt_srcs) | |
1111 | return NULL; | |
1112 | mld_hdr_size += llqt_srcs * sizeof(struct in6_addr); | |
1113 | } | |
1114 | } | |
1115 | ||
1116 | pkt_size = sizeof(*eth) + sizeof(*ip6h) + 8 + mld_hdr_size; | |
1117 | if ((p && pkt_size > p->dev->mtu) || | |
adc47037 | 1118 | pkt_size > brmctx->br->dev->mtu) |
438ef2d0 NA |
1119 | return NULL; |
1120 | ||
adc47037 | 1121 | skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size); |
08b202b6 YH |
1122 | if (!skb) |
1123 | goto out; | |
1124 | ||
615cc23e | 1125 | __br_multicast_query_handle_vlan(brmctx, pmctx, skb); |
08b202b6 YH |
1126 | skb->protocol = htons(ETH_P_IPV6); |
1127 | ||
1128 | /* Ethernet header */ | |
1129 | skb_reset_mac_header(skb); | |
1130 | eth = eth_hdr(skb); | |
1131 | ||
adc47037 | 1132 | ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr); |
08b202b6 YH |
1133 | eth->h_proto = htons(ETH_P_IPV6); |
1134 | skb_put(skb, sizeof(*eth)); | |
1135 | ||
1136 | /* IPv6 header + HbH option */ | |
1137 | skb_set_network_header(skb, skb->len); | |
1138 | ip6h = ipv6_hdr(skb); | |
1139 | ||
1140 | *(__force __be32 *)ip6h = htonl(0x60000000); | |
aa2ae3e7 | 1141 | ip6h->payload_len = htons(8 + mld_hdr_size); |
08b202b6 YH |
1142 | ip6h->nexthdr = IPPROTO_HOPOPTS; |
1143 | ip6h->hop_limit = 1; | |
438ef2d0 | 1144 | ip6h->daddr = *ip6_dst; |
adc47037 NA |
1145 | if (ipv6_dev_get_saddr(dev_net(brmctx->br->dev), brmctx->br->dev, |
1146 | &ip6h->daddr, 0, &ip6h->saddr)) { | |
d1d81d4c | 1147 | kfree_skb(skb); |
adc47037 | 1148 | br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, false); |
d1d81d4c UW |
1149 | return NULL; |
1150 | } | |
0888d5f3 | 1151 | |
adc47037 | 1152 | br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, true); |
36cff5a1 | 1153 | ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); |
08b202b6 YH |
1154 | |
1155 | hopopt = (u8 *)(ip6h + 1); | |
1156 | hopopt[0] = IPPROTO_ICMPV6; /* next hdr */ | |
1157 | hopopt[1] = 0; /* length of HbH */ | |
1158 | hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */ | |
1159 | hopopt[3] = 2; /* Length of RA Option */ | |
1160 | hopopt[4] = 0; /* Type = 0x0000 (MLD) */ | |
1161 | hopopt[5] = 0; | |
1de5a71c EZ |
1162 | hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */ |
1163 | hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */ | |
08b202b6 YH |
1164 | |
1165 | skb_put(skb, sizeof(*ip6h) + 8); | |
1166 | ||
1167 | /* ICMPv6 */ | |
1168 | skb_set_transport_header(skb, skb->len); | |
438ef2d0 | 1169 | interval = ipv6_addr_any(group) ? |
d3d065c0 NA |
1170 | brmctx->multicast_query_response_interval : |
1171 | brmctx->multicast_last_member_interval; | |
1080ab95 | 1172 | *igmp_type = ICMPV6_MGM_QUERY; |
d3d065c0 | 1173 | switch (brmctx->multicast_mld_version) { |
aa2ae3e7 NA |
1174 | case 1: |
1175 | mldq = (struct mld_msg *)icmp6_hdr(skb); | |
1176 | mldq->mld_type = ICMPV6_MGM_QUERY; | |
1177 | mldq->mld_code = 0; | |
1178 | mldq->mld_cksum = 0; | |
1179 | mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval)); | |
1180 | mldq->mld_reserved = 0; | |
438ef2d0 NA |
1181 | mldq->mld_mca = *group; |
1182 | csum = &mldq->mld_cksum; | |
1183 | csum_start = (void *)mldq; | |
aa2ae3e7 NA |
1184 | break; |
1185 | case 2: | |
1186 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
53631a5f | 1187 | mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval)); |
aa2ae3e7 NA |
1188 | mld2q->mld2q_type = ICMPV6_MGM_QUERY; |
1189 | mld2q->mld2q_code = 0; | |
1190 | mld2q->mld2q_cksum = 0; | |
1191 | mld2q->mld2q_resv1 = 0; | |
1192 | mld2q->mld2q_resv2 = 0; | |
438ef2d0 | 1193 | mld2q->mld2q_suppress = sflag; |
aa2ae3e7 | 1194 | mld2q->mld2q_qrv = 2; |
438ef2d0 | 1195 | mld2q->mld2q_nsrcs = htons(llqt_srcs); |
d3d065c0 | 1196 | mld2q->mld2q_qqic = brmctx->multicast_query_interval / HZ; |
438ef2d0 NA |
1197 | mld2q->mld2q_mca = *group; |
1198 | csum = &mld2q->mld2q_cksum; | |
1199 | csum_start = (void *)mld2q; | |
1200 | if (!pg || !with_srcs) | |
1201 | break; | |
1202 | ||
1203 | llqt_srcs = 0; | |
1204 | hlist_for_each_entry(ent, &pg->src_list, node) { | |
1205 | if (over_llqt == time_after(ent->timer.expires, | |
1206 | llqt) && | |
1207 | ent->src_query_rexmit_cnt > 0) { | |
deb96566 | 1208 | mld2q->mld2q_srcs[llqt_srcs++] = ent->addr.src.ip6; |
438ef2d0 | 1209 | ent->src_query_rexmit_cnt--; |
42c11ccf NA |
1210 | if (need_rexmit && ent->src_query_rexmit_cnt) |
1211 | *need_rexmit = true; | |
438ef2d0 NA |
1212 | } |
1213 | } | |
1214 | if (WARN_ON(llqt_srcs != ntohs(mld2q->mld2q_nsrcs))) { | |
1215 | kfree_skb(skb); | |
1216 | return NULL; | |
1217 | } | |
aa2ae3e7 NA |
1218 | break; |
1219 | } | |
08b202b6 | 1220 | |
438ef2d0 NA |
1221 | if (WARN_ON(!csum || !csum_start)) { |
1222 | kfree_skb(skb); | |
1223 | return NULL; | |
1224 | } | |
1225 | ||
1226 | *csum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, mld_hdr_size, | |
1227 | IPPROTO_ICMPV6, | |
1228 | csum_partial(csum_start, mld_hdr_size, 0)); | |
1229 | skb_put(skb, mld_hdr_size); | |
08b202b6 YH |
1230 | __skb_pull(skb, sizeof(*eth)); |
1231 | ||
1232 | out: | |
1233 | return skb; | |
1234 | } | |
1235 | #endif | |
1236 | ||
adc47037 | 1237 | static struct sk_buff *br_multicast_alloc_query(struct net_bridge_mcast *brmctx, |
615cc23e | 1238 | struct net_bridge_mcast_port *pmctx, |
438ef2d0 NA |
1239 | struct net_bridge_port_group *pg, |
1240 | struct br_ip *ip_dst, | |
1241 | struct br_ip *group, | |
1242 | bool with_srcs, bool over_lmqt, | |
42c11ccf NA |
1243 | u8 sflag, u8 *igmp_type, |
1244 | bool *need_rexmit) | |
8ef2a9a5 | 1245 | { |
438ef2d0 NA |
1246 | __be32 ip4_dst; |
1247 | ||
1248 | switch (group->proto) { | |
8ef2a9a5 | 1249 | case htons(ETH_P_IP): |
eab3227b | 1250 | ip4_dst = ip_dst ? ip_dst->dst.ip4 : htonl(INADDR_ALLHOSTS_GROUP); |
615cc23e | 1251 | return br_ip4_multicast_alloc_query(brmctx, pmctx, pg, |
eab3227b | 1252 | ip4_dst, group->dst.ip4, |
438ef2d0 | 1253 | with_srcs, over_lmqt, |
42c11ccf NA |
1254 | sflag, igmp_type, |
1255 | need_rexmit); | |
dfd56b8b | 1256 | #if IS_ENABLED(CONFIG_IPV6) |
438ef2d0 NA |
1257 | case htons(ETH_P_IPV6): { |
1258 | struct in6_addr ip6_dst; | |
1259 | ||
1260 | if (ip_dst) | |
eab3227b | 1261 | ip6_dst = ip_dst->dst.ip6; |
438ef2d0 NA |
1262 | else |
1263 | ipv6_addr_set(&ip6_dst, htonl(0xff020000), 0, 0, | |
1264 | htonl(1)); | |
1265 | ||
615cc23e | 1266 | return br_ip6_multicast_alloc_query(brmctx, pmctx, pg, |
eab3227b | 1267 | &ip6_dst, &group->dst.ip6, |
438ef2d0 | 1268 | with_srcs, over_lmqt, |
42c11ccf NA |
1269 | sflag, igmp_type, |
1270 | need_rexmit); | |
438ef2d0 | 1271 | } |
08b202b6 | 1272 | #endif |
8ef2a9a5 YH |
1273 | } |
1274 | return NULL; | |
1275 | } | |
1276 | ||
cfd56754 | 1277 | struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, |
5e923585 | 1278 | struct br_ip *group) |
eb1d1641 | 1279 | { |
eb1d1641 | 1280 | struct net_bridge_mdb_entry *mp; |
4c0833bc | 1281 | int err; |
eb1d1641 | 1282 | |
19e3a9c9 NA |
1283 | mp = br_mdb_ip_get(br, group); |
1284 | if (mp) | |
1285 | return mp; | |
eb1d1641 | 1286 | |
19e3a9c9 | 1287 | if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) { |
b57e8d87 | 1288 | trace_br_mdb_full(br->dev, group); |
c832962a | 1289 | br_mc_disabled_update(br->dev, false, NULL); |
19e3a9c9 NA |
1290 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false); |
1291 | return ERR_PTR(-E2BIG); | |
eb1d1641 HX |
1292 | } |
1293 | ||
1294 | mp = kzalloc(sizeof(*mp), GFP_ATOMIC); | |
1295 | if (unlikely(!mp)) | |
4c0833bc | 1296 | return ERR_PTR(-ENOMEM); |
eb1d1641 HX |
1297 | |
1298 | mp->br = br; | |
8ef2a9a5 | 1299 | mp->addr = *group; |
e12cec65 | 1300 | mp->mcast_gc.destroy = br_multicast_destroy_mdb_entry; |
88c1f37f | 1301 | timer_setup(&mp->timer, br_multicast_group_expired, 0); |
19e3a9c9 NA |
1302 | err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode, |
1303 | br_mdb_rht_params); | |
1304 | if (err) { | |
1305 | kfree(mp); | |
1306 | mp = ERR_PTR(err); | |
1307 | } else { | |
1308 | hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list); | |
1309 | } | |
1faabf2a | 1310 | |
eb1d1641 HX |
1311 | return mp; |
1312 | } | |
1313 | ||
8b671779 NA |
1314 | static void br_multicast_group_src_expired(struct timer_list *t) |
1315 | { | |
1316 | struct net_bridge_group_src *src = from_timer(src, t, timer); | |
1317 | struct net_bridge_port_group *pg; | |
1318 | struct net_bridge *br = src->br; | |
1319 | ||
1320 | spin_lock(&br->multicast_lock); | |
1321 | if (hlist_unhashed(&src->node) || !netif_running(br->dev) || | |
1322 | timer_pending(&src->timer)) | |
1323 | goto out; | |
1324 | ||
1325 | pg = src->pg; | |
1326 | if (pg->filter_mode == MCAST_INCLUDE) { | |
d5a10222 | 1327 | br_multicast_del_group_src(src, false); |
8b671779 NA |
1328 | if (!hlist_empty(&pg->src_list)) |
1329 | goto out; | |
1330 | br_multicast_find_del_pg(br, pg); | |
9116ffbf NA |
1331 | } else { |
1332 | br_multicast_fwd_src_handle(src); | |
8b671779 | 1333 | } |
9116ffbf | 1334 | |
8b671779 NA |
1335 | out: |
1336 | spin_unlock(&br->multicast_lock); | |
1337 | } | |
1338 | ||
474ddb37 | 1339 | struct net_bridge_group_src * |
8b671779 NA |
1340 | br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip) |
1341 | { | |
1342 | struct net_bridge_group_src *ent; | |
1343 | ||
1344 | switch (ip->proto) { | |
1345 | case htons(ETH_P_IP): | |
1346 | hlist_for_each_entry(ent, &pg->src_list, node) | |
deb96566 | 1347 | if (ip->src.ip4 == ent->addr.src.ip4) |
8b671779 NA |
1348 | return ent; |
1349 | break; | |
1350 | #if IS_ENABLED(CONFIG_IPV6) | |
1351 | case htons(ETH_P_IPV6): | |
1352 | hlist_for_each_entry(ent, &pg->src_list, node) | |
deb96566 | 1353 | if (!ipv6_addr_cmp(&ent->addr.src.ip6, &ip->src.ip6)) |
8b671779 NA |
1354 | return ent; |
1355 | break; | |
1356 | #endif | |
1357 | } | |
1358 | ||
1359 | return NULL; | |
1360 | } | |
1361 | ||
fd0c6961 | 1362 | struct net_bridge_group_src * |
8b671779 NA |
1363 | br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip) |
1364 | { | |
1365 | struct net_bridge_group_src *grp_src; | |
1366 | ||
1367 | if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT)) | |
1368 | return NULL; | |
1369 | ||
1370 | switch (src_ip->proto) { | |
1371 | case htons(ETH_P_IP): | |
deb96566 NA |
1372 | if (ipv4_is_zeronet(src_ip->src.ip4) || |
1373 | ipv4_is_multicast(src_ip->src.ip4)) | |
8b671779 NA |
1374 | return NULL; |
1375 | break; | |
1376 | #if IS_ENABLED(CONFIG_IPV6) | |
1377 | case htons(ETH_P_IPV6): | |
deb96566 NA |
1378 | if (ipv6_addr_any(&src_ip->src.ip6) || |
1379 | ipv6_addr_is_multicast(&src_ip->src.ip6)) | |
8b671779 NA |
1380 | return NULL; |
1381 | break; | |
1382 | #endif | |
1383 | } | |
1384 | ||
1385 | grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC); | |
1386 | if (unlikely(!grp_src)) | |
1387 | return NULL; | |
1388 | ||
1389 | grp_src->pg = pg; | |
085b53c8 | 1390 | grp_src->br = pg->key.port->br; |
8b671779 | 1391 | grp_src->addr = *src_ip; |
e12cec65 | 1392 | grp_src->mcast_gc.destroy = br_multicast_destroy_group_src; |
8b671779 NA |
1393 | timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0); |
1394 | ||
1395 | hlist_add_head_rcu(&grp_src->node, &pg->src_list); | |
1396 | pg->src_ents++; | |
1397 | ||
1398 | return grp_src; | |
1399 | } | |
1400 | ||
cfd56754 CW |
1401 | struct net_bridge_port_group *br_multicast_new_port_group( |
1402 | struct net_bridge_port *port, | |
f86c3e2c | 1403 | const struct br_ip *group, |
ccb1c31a | 1404 | struct net_bridge_port_group __rcu *next, |
6db6f0ea | 1405 | unsigned char flags, |
8b671779 | 1406 | const unsigned char *src, |
8f8cb77e | 1407 | u8 filter_mode, |
60977a0c PM |
1408 | u8 rt_protocol, |
1409 | struct netlink_ext_ack *extack) | |
cfd56754 CW |
1410 | { |
1411 | struct net_bridge_port_group *p; | |
b57e8d87 PM |
1412 | int err; |
1413 | ||
1414 | err = br_multicast_port_ngroups_inc(port, group, extack); | |
1415 | if (err) | |
1416 | return NULL; | |
cfd56754 CW |
1417 | |
1418 | p = kzalloc(sizeof(*p), GFP_ATOMIC); | |
1c85b80b PM |
1419 | if (unlikely(!p)) { |
1420 | NL_SET_ERR_MSG_MOD(extack, "Couldn't allocate new port group"); | |
b57e8d87 | 1421 | goto dec_out; |
1c85b80b | 1422 | } |
cfd56754 | 1423 | |
085b53c8 NA |
1424 | p->key.addr = *group; |
1425 | p->key.port = port; | |
9d06b6d8 | 1426 | p->flags = flags; |
8b671779 | 1427 | p->filter_mode = filter_mode; |
8f8cb77e | 1428 | p->rt_protocol = rt_protocol; |
5b163288 | 1429 | p->eht_host_tree = RB_ROOT; |
baa74d39 | 1430 | p->eht_set_tree = RB_ROOT; |
e12cec65 | 1431 | p->mcast_gc.destroy = br_multicast_destroy_port_group; |
8b671779 | 1432 | INIT_HLIST_HEAD(&p->src_list); |
085b53c8 NA |
1433 | |
1434 | if (!br_multicast_is_star_g(group) && | |
1435 | rhashtable_lookup_insert_fast(&port->br->sg_port_tbl, &p->rhnode, | |
1436 | br_sg_port_rht_params)) { | |
1c85b80b | 1437 | NL_SET_ERR_MSG_MOD(extack, "Couldn't insert new port group"); |
eceb3085 | 1438 | goto free_out; |
085b53c8 NA |
1439 | } |
1440 | ||
eca2a43b | 1441 | rcu_assign_pointer(p->next, next); |
88c1f37f | 1442 | timer_setup(&p->timer, br_multicast_port_group_expired, 0); |
42c11ccf NA |
1443 | timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0); |
1444 | hlist_add_head(&p->mglist, &port->mglist); | |
6db6f0ea FF |
1445 | |
1446 | if (src) | |
1447 | memcpy(p->eth_addr, src, ETH_ALEN); | |
1448 | else | |
1bfe45f4 | 1449 | eth_broadcast_addr(p->eth_addr); |
6db6f0ea | 1450 | |
cfd56754 | 1451 | return p; |
eceb3085 PM |
1452 | |
1453 | free_out: | |
1454 | kfree(p); | |
b57e8d87 PM |
1455 | dec_out: |
1456 | br_multicast_port_ngroups_dec(port, group->vid); | |
eceb3085 | 1457 | return NULL; |
cfd56754 CW |
1458 | } |
1459 | ||
976b3858 PM |
1460 | void br_multicast_del_port_group(struct net_bridge_port_group *p) |
1461 | { | |
1462 | struct net_bridge_port *port = p->key.port; | |
b57e8d87 | 1463 | __u16 vid = p->key.addr.vid; |
976b3858 PM |
1464 | |
1465 | hlist_del_init(&p->mglist); | |
1466 | if (!br_multicast_is_star_g(&p->key.addr)) | |
1467 | rhashtable_remove_fast(&port->br->sg_port_tbl, &p->rhnode, | |
1468 | br_sg_port_rht_params); | |
1469 | kfree(p); | |
b57e8d87 | 1470 | br_multicast_port_ngroups_dec(port, vid); |
976b3858 PM |
1471 | } |
1472 | ||
58d913a3 NA |
1473 | void br_multicast_host_join(const struct net_bridge_mcast *brmctx, |
1474 | struct net_bridge_mdb_entry *mp, bool notify) | |
1bc844ee NA |
1475 | { |
1476 | if (!mp->host_joined) { | |
1477 | mp->host_joined = true; | |
094b82fd NA |
1478 | if (br_multicast_is_star_g(&mp->addr)) |
1479 | br_multicast_star_g_host_state(mp); | |
1bc844ee | 1480 | if (notify) |
81f19838 | 1481 | br_mdb_notify(mp->br->dev, mp, NULL, RTM_NEWMDB); |
1bc844ee | 1482 | } |
955062b0 NA |
1483 | |
1484 | if (br_group_is_l2(&mp->addr)) | |
1485 | return; | |
1486 | ||
58d913a3 | 1487 | mod_timer(&mp->timer, jiffies + brmctx->multicast_membership_interval); |
1bc844ee NA |
1488 | } |
1489 | ||
1490 | void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify) | |
1491 | { | |
1492 | if (!mp->host_joined) | |
1493 | return; | |
1494 | ||
1495 | mp->host_joined = false; | |
094b82fd NA |
1496 | if (br_multicast_is_star_g(&mp->addr)) |
1497 | br_multicast_star_g_host_state(mp); | |
1bc844ee | 1498 | if (notify) |
81f19838 | 1499 | br_mdb_notify(mp->br->dev, mp, NULL, RTM_DELMDB); |
1bc844ee NA |
1500 | } |
1501 | ||
b0812368 | 1502 | static struct net_bridge_port_group * |
adc47037 NA |
1503 | __br_multicast_add_group(struct net_bridge_mcast *brmctx, |
1504 | struct net_bridge_mcast_port *pmctx, | |
b0812368 NA |
1505 | struct br_ip *group, |
1506 | const unsigned char *src, | |
1507 | u8 filter_mode, | |
9116ffbf NA |
1508 | bool igmpv2_mldv1, |
1509 | bool blocked) | |
eb1d1641 | 1510 | { |
e8051688 | 1511 | struct net_bridge_port_group __rcu **pp; |
b0812368 | 1512 | struct net_bridge_port_group *p = NULL; |
5e923585 | 1513 | struct net_bridge_mdb_entry *mp; |
454594f3 | 1514 | unsigned long now = jiffies; |
eb1d1641 | 1515 | |
4cdd0d10 | 1516 | if (!br_multicast_ctx_should_use(brmctx, pmctx)) |
eb1d1641 HX |
1517 | goto out; |
1518 | ||
adc47037 | 1519 | mp = br_multicast_new_group(brmctx->br, group); |
4c0833bc | 1520 | if (IS_ERR(mp)) |
1697291d | 1521 | return ERR_CAST(mp); |
eb1d1641 | 1522 | |
adc47037 | 1523 | if (!pmctx) { |
58d913a3 | 1524 | br_multicast_host_join(brmctx, mp, true); |
eb1d1641 HX |
1525 | goto out; |
1526 | } | |
1527 | ||
e8051688 | 1528 | for (pp = &mp->ports; |
adc47037 | 1529 | (p = mlock_dereference(*pp, brmctx->br)) != NULL; |
e8051688 | 1530 | pp = &p->next) { |
adc47037 | 1531 | if (br_port_group_equal(p, pmctx->port, src)) |
454594f3 | 1532 | goto found; |
adc47037 | 1533 | if ((unsigned long)p->key.port < (unsigned long)pmctx->port) |
eb1d1641 HX |
1534 | break; |
1535 | } | |
1536 | ||
adc47037 | 1537 | p = br_multicast_new_port_group(pmctx->port, group, *pp, 0, src, |
60977a0c | 1538 | filter_mode, RTPROT_KERNEL, NULL); |
b0812368 NA |
1539 | if (unlikely(!p)) { |
1540 | p = ERR_PTR(-ENOMEM); | |
1541 | goto out; | |
1542 | } | |
eb1d1641 | 1543 | rcu_assign_pointer(*pp, p); |
9116ffbf NA |
1544 | if (blocked) |
1545 | p->flags |= MDB_PG_FLAGS_BLOCKED; | |
adc47037 | 1546 | br_mdb_notify(brmctx->br->dev, mp, p, RTM_NEWMDB); |
eb1d1641 | 1547 | |
454594f3 | 1548 | found: |
0436862e | 1549 | if (igmpv2_mldv1) |
d3d065c0 | 1550 | mod_timer(&p->timer, |
adc47037 | 1551 | now + brmctx->multicast_membership_interval); |
81f19838 | 1552 | |
eb1d1641 | 1553 | out: |
b0812368 NA |
1554 | return p; |
1555 | } | |
1556 | ||
adc47037 NA |
1557 | static int br_multicast_add_group(struct net_bridge_mcast *brmctx, |
1558 | struct net_bridge_mcast_port *pmctx, | |
b0812368 NA |
1559 | struct br_ip *group, |
1560 | const unsigned char *src, | |
1561 | u8 filter_mode, | |
1562 | bool igmpv2_mldv1) | |
1563 | { | |
1564 | struct net_bridge_port_group *pg; | |
1565 | int err; | |
eb1d1641 | 1566 | |
adc47037 NA |
1567 | spin_lock(&brmctx->br->multicast_lock); |
1568 | pg = __br_multicast_add_group(brmctx, pmctx, group, src, filter_mode, | |
9116ffbf | 1569 | igmpv2_mldv1, false); |
b0812368 | 1570 | /* NULL is considered valid for host joined groups */ |
8d21c882 | 1571 | err = PTR_ERR_OR_ZERO(pg); |
adc47037 | 1572 | spin_unlock(&brmctx->br->multicast_lock); |
b0812368 | 1573 | |
eb1d1641 HX |
1574 | return err; |
1575 | } | |
1576 | ||
adc47037 NA |
1577 | static int br_ip4_multicast_add_group(struct net_bridge_mcast *brmctx, |
1578 | struct net_bridge_mcast_port *pmctx, | |
b0e9a30d | 1579 | __be32 group, |
6db6f0ea | 1580 | __u16 vid, |
8b671779 NA |
1581 | const unsigned char *src, |
1582 | bool igmpv2) | |
8ef2a9a5 YH |
1583 | { |
1584 | struct br_ip br_group; | |
8b671779 | 1585 | u8 filter_mode; |
8ef2a9a5 YH |
1586 | |
1587 | if (ipv4_is_local_multicast(group)) | |
1588 | return 0; | |
1589 | ||
1515a63f | 1590 | memset(&br_group, 0, sizeof(br_group)); |
eab3227b | 1591 | br_group.dst.ip4 = group; |
8ef2a9a5 | 1592 | br_group.proto = htons(ETH_P_IP); |
b0e9a30d | 1593 | br_group.vid = vid; |
8b671779 | 1594 | filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE; |
8ef2a9a5 | 1595 | |
adc47037 NA |
1596 | return br_multicast_add_group(brmctx, pmctx, &br_group, src, |
1597 | filter_mode, igmpv2); | |
8ef2a9a5 YH |
1598 | } |
1599 | ||
dfd56b8b | 1600 | #if IS_ENABLED(CONFIG_IPV6) |
adc47037 NA |
1601 | static int br_ip6_multicast_add_group(struct net_bridge_mcast *brmctx, |
1602 | struct net_bridge_mcast_port *pmctx, | |
b0e9a30d | 1603 | const struct in6_addr *group, |
6db6f0ea | 1604 | __u16 vid, |
8b671779 NA |
1605 | const unsigned char *src, |
1606 | bool mldv1) | |
08b202b6 YH |
1607 | { |
1608 | struct br_ip br_group; | |
8b671779 | 1609 | u8 filter_mode; |
08b202b6 | 1610 | |
3c3769e6 | 1611 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
1612 | return 0; |
1613 | ||
19e3a9c9 | 1614 | memset(&br_group, 0, sizeof(br_group)); |
eab3227b | 1615 | br_group.dst.ip6 = *group; |
9cc6e0c4 | 1616 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 1617 | br_group.vid = vid; |
8b671779 | 1618 | filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE; |
08b202b6 | 1619 | |
adc47037 NA |
1620 | return br_multicast_add_group(brmctx, pmctx, &br_group, src, |
1621 | filter_mode, mldv1); | |
08b202b6 YH |
1622 | } |
1623 | #endif | |
1624 | ||
ed2d3597 LL |
1625 | static bool br_multicast_rport_del(struct hlist_node *rlist) |
1626 | { | |
1627 | if (hlist_unhashed(rlist)) | |
1628 | return false; | |
1629 | ||
1630 | hlist_del_init_rcu(rlist); | |
1631 | return true; | |
1632 | } | |
1633 | ||
adc47037 | 1634 | static bool br_ip4_multicast_rport_del(struct net_bridge_mcast_port *pmctx) |
ed2d3597 | 1635 | { |
adc47037 | 1636 | return br_multicast_rport_del(&pmctx->ip4_rlist); |
ed2d3597 LL |
1637 | } |
1638 | ||
adc47037 | 1639 | static bool br_ip6_multicast_rport_del(struct net_bridge_mcast_port *pmctx) |
a3c02e76 LL |
1640 | { |
1641 | #if IS_ENABLED(CONFIG_IPV6) | |
adc47037 | 1642 | return br_multicast_rport_del(&pmctx->ip6_rlist); |
a3c02e76 LL |
1643 | #else |
1644 | return false; | |
1645 | #endif | |
1646 | } | |
1647 | ||
9632233e | 1648 | static void br_multicast_router_expired(struct net_bridge_mcast_port *pmctx, |
ee5fb222 LL |
1649 | struct timer_list *t, |
1650 | struct hlist_node *rlist) | |
eb1d1641 | 1651 | { |
9632233e | 1652 | struct net_bridge *br = pmctx->port->br; |
ed2d3597 | 1653 | bool del; |
eb1d1641 HX |
1654 | |
1655 | spin_lock(&br->multicast_lock); | |
9632233e NA |
1656 | if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED || |
1657 | pmctx->multicast_router == MDB_RTR_TYPE_PERM || | |
ee5fb222 | 1658 | timer_pending(t)) |
eb1d1641 HX |
1659 | goto out; |
1660 | ||
ed2d3597 | 1661 | del = br_multicast_rport_del(rlist); |
adc47037 | 1662 | br_multicast_rport_del_notify(pmctx, del); |
eb1d1641 HX |
1663 | out: |
1664 | spin_unlock(&br->multicast_lock); | |
1665 | } | |
1666 | ||
ee5fb222 LL |
1667 | static void br_ip4_multicast_router_expired(struct timer_list *t) |
1668 | { | |
9632233e NA |
1669 | struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t, |
1670 | ip4_mc_router_timer); | |
ee5fb222 | 1671 | |
9632233e | 1672 | br_multicast_router_expired(pmctx, t, &pmctx->ip4_rlist); |
ee5fb222 LL |
1673 | } |
1674 | ||
a3c02e76 LL |
1675 | #if IS_ENABLED(CONFIG_IPV6) |
1676 | static void br_ip6_multicast_router_expired(struct timer_list *t) | |
1677 | { | |
9632233e NA |
1678 | struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t, |
1679 | ip6_mc_router_timer); | |
a3c02e76 | 1680 | |
9632233e | 1681 | br_multicast_router_expired(pmctx, t, &pmctx->ip6_rlist); |
a3c02e76 LL |
1682 | } |
1683 | #endif | |
1684 | ||
77041420 YG |
1685 | static void br_mc_router_state_change(struct net_bridge *p, |
1686 | bool is_mc_router) | |
1687 | { | |
1688 | struct switchdev_attr attr = { | |
1689 | .orig_dev = p->dev, | |
1690 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER, | |
1691 | .flags = SWITCHDEV_F_DEFER, | |
1692 | .u.mrouter = is_mc_router, | |
1693 | }; | |
1694 | ||
dcbdf135 | 1695 | switchdev_port_attr_set(p->dev, &attr, NULL); |
77041420 YG |
1696 | } |
1697 | ||
d3d065c0 | 1698 | static void br_multicast_local_router_expired(struct net_bridge_mcast *brmctx, |
ee5fb222 | 1699 | struct timer_list *timer) |
eb1d1641 | 1700 | { |
d3d065c0 NA |
1701 | spin_lock(&brmctx->br->multicast_lock); |
1702 | if (brmctx->multicast_router == MDB_RTR_TYPE_DISABLED || | |
1703 | brmctx->multicast_router == MDB_RTR_TYPE_PERM || | |
1704 | br_ip4_multicast_is_router(brmctx) || | |
1705 | br_ip6_multicast_is_router(brmctx)) | |
77041420 YG |
1706 | goto out; |
1707 | ||
d3d065c0 | 1708 | br_mc_router_state_change(brmctx->br, false); |
77041420 | 1709 | out: |
d3d065c0 | 1710 | spin_unlock(&brmctx->br->multicast_lock); |
eb1d1641 HX |
1711 | } |
1712 | ||
ee5fb222 LL |
1713 | static void br_ip4_multicast_local_router_expired(struct timer_list *t) |
1714 | { | |
d3d065c0 NA |
1715 | struct net_bridge_mcast *brmctx = from_timer(brmctx, t, |
1716 | ip4_mc_router_timer); | |
ee5fb222 | 1717 | |
d3d065c0 | 1718 | br_multicast_local_router_expired(brmctx, t); |
ee5fb222 LL |
1719 | } |
1720 | ||
a3c02e76 LL |
1721 | #if IS_ENABLED(CONFIG_IPV6) |
1722 | static void br_ip6_multicast_local_router_expired(struct timer_list *t) | |
1723 | { | |
d3d065c0 NA |
1724 | struct net_bridge_mcast *brmctx = from_timer(brmctx, t, |
1725 | ip6_mc_router_timer); | |
a3c02e76 | 1726 | |
d3d065c0 | 1727 | br_multicast_local_router_expired(brmctx, t); |
a3c02e76 LL |
1728 | } |
1729 | #endif | |
1730 | ||
d3d065c0 | 1731 | static void br_multicast_querier_expired(struct net_bridge_mcast *brmctx, |
90010b36 | 1732 | struct bridge_mcast_own_query *query) |
c83b8fab | 1733 | { |
d3d065c0 NA |
1734 | spin_lock(&brmctx->br->multicast_lock); |
1735 | if (!netif_running(brmctx->br->dev) || | |
4cdd0d10 | 1736 | br_multicast_ctx_vlan_global_disabled(brmctx) || |
d3d065c0 | 1737 | !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED)) |
c83b8fab HX |
1738 | goto out; |
1739 | ||
adc47037 | 1740 | br_multicast_start_querier(brmctx, query); |
c83b8fab HX |
1741 | |
1742 | out: | |
d3d065c0 | 1743 | spin_unlock(&brmctx->br->multicast_lock); |
c83b8fab HX |
1744 | } |
1745 | ||
88c1f37f | 1746 | static void br_ip4_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 1747 | { |
d3d065c0 NA |
1748 | struct net_bridge_mcast *brmctx = from_timer(brmctx, t, |
1749 | ip4_other_query.timer); | |
cc0fdd80 | 1750 | |
d3d065c0 | 1751 | br_multicast_querier_expired(brmctx, &brmctx->ip4_own_query); |
cc0fdd80 LL |
1752 | } |
1753 | ||
1754 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 1755 | static void br_ip6_multicast_querier_expired(struct timer_list *t) |
cc0fdd80 | 1756 | { |
d3d065c0 NA |
1757 | struct net_bridge_mcast *brmctx = from_timer(brmctx, t, |
1758 | ip6_other_query.timer); | |
cc0fdd80 | 1759 | |
d3d065c0 | 1760 | br_multicast_querier_expired(brmctx, &brmctx->ip6_own_query); |
cc0fdd80 LL |
1761 | } |
1762 | #endif | |
1763 | ||
adc47037 | 1764 | static void br_multicast_select_own_querier(struct net_bridge_mcast *brmctx, |
dc4eb53a LL |
1765 | struct br_ip *ip, |
1766 | struct sk_buff *skb) | |
1767 | { | |
1768 | if (ip->proto == htons(ETH_P_IP)) | |
d3d065c0 | 1769 | brmctx->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr; |
dc4eb53a LL |
1770 | #if IS_ENABLED(CONFIG_IPV6) |
1771 | else | |
d3d065c0 | 1772 | brmctx->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr; |
dc4eb53a LL |
1773 | #endif |
1774 | } | |
1775 | ||
adc47037 NA |
1776 | static void __br_multicast_send_query(struct net_bridge_mcast *brmctx, |
1777 | struct net_bridge_mcast_port *pmctx, | |
438ef2d0 NA |
1778 | struct net_bridge_port_group *pg, |
1779 | struct br_ip *ip_dst, | |
1780 | struct br_ip *group, | |
1781 | bool with_srcs, | |
42c11ccf NA |
1782 | u8 sflag, |
1783 | bool *need_rexmit) | |
eb1d1641 | 1784 | { |
438ef2d0 | 1785 | bool over_lmqt = !!sflag; |
eb1d1641 | 1786 | struct sk_buff *skb; |
1080ab95 | 1787 | u8 igmp_type; |
eb1d1641 | 1788 | |
cb486ce9 NA |
1789 | if (!br_multicast_ctx_should_use(brmctx, pmctx) || |
1790 | !br_multicast_ctx_matches_vlan_snooping(brmctx)) | |
615cc23e NA |
1791 | return; |
1792 | ||
438ef2d0 | 1793 | again_under_lmqt: |
615cc23e NA |
1794 | skb = br_multicast_alloc_query(brmctx, pmctx, pg, ip_dst, group, |
1795 | with_srcs, over_lmqt, sflag, &igmp_type, | |
42c11ccf | 1796 | need_rexmit); |
eb1d1641 | 1797 | if (!skb) |
8ef2a9a5 | 1798 | return; |
eb1d1641 | 1799 | |
adc47037 NA |
1800 | if (pmctx) { |
1801 | skb->dev = pmctx->port->dev; | |
1802 | br_multicast_count(brmctx->br, pmctx->port, skb, igmp_type, | |
1080ab95 | 1803 | BR_MCAST_DIR_TX); |
29a26a56 | 1804 | NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, |
adc47037 | 1805 | dev_net(pmctx->port->dev), NULL, skb, NULL, skb->dev, |
f0b4eece | 1806 | br_dev_queue_push_xmit); |
438ef2d0 NA |
1807 | |
1808 | if (over_lmqt && with_srcs && sflag) { | |
1809 | over_lmqt = false; | |
1810 | goto again_under_lmqt; | |
1811 | } | |
dc4eb53a | 1812 | } else { |
adc47037 NA |
1813 | br_multicast_select_own_querier(brmctx, group, skb); |
1814 | br_multicast_count(brmctx->br, NULL, skb, igmp_type, | |
1080ab95 | 1815 | BR_MCAST_DIR_RX); |
eb1d1641 | 1816 | netif_rx(skb); |
dc4eb53a | 1817 | } |
8ef2a9a5 YH |
1818 | } |
1819 | ||
67b746f9 NA |
1820 | static void br_multicast_read_querier(const struct bridge_mcast_querier *querier, |
1821 | struct bridge_mcast_querier *dest) | |
1822 | { | |
1823 | unsigned int seq; | |
1824 | ||
1825 | memset(dest, 0, sizeof(*dest)); | |
1826 | do { | |
1827 | seq = read_seqcount_begin(&querier->seq); | |
1828 | dest->port_ifidx = querier->port_ifidx; | |
1829 | memcpy(&dest->addr, &querier->addr, sizeof(struct br_ip)); | |
1830 | } while (read_seqcount_retry(&querier->seq, seq)); | |
1831 | } | |
1832 | ||
1833 | static void br_multicast_update_querier(struct net_bridge_mcast *brmctx, | |
1834 | struct bridge_mcast_querier *querier, | |
1835 | int ifindex, | |
1836 | struct br_ip *saddr) | |
1837 | { | |
67b746f9 NA |
1838 | write_seqcount_begin(&querier->seq); |
1839 | querier->port_ifidx = ifindex; | |
1840 | memcpy(&querier->addr, saddr, sizeof(*saddr)); | |
1841 | write_seqcount_end(&querier->seq); | |
1842 | } | |
1843 | ||
adc47037 NA |
1844 | static void br_multicast_send_query(struct net_bridge_mcast *brmctx, |
1845 | struct net_bridge_mcast_port *pmctx, | |
90010b36 | 1846 | struct bridge_mcast_own_query *own_query) |
8ef2a9a5 | 1847 | { |
90010b36 | 1848 | struct bridge_mcast_other_query *other_query = NULL; |
67b746f9 | 1849 | struct bridge_mcast_querier *querier; |
5e923585 NA |
1850 | struct br_ip br_group; |
1851 | unsigned long time; | |
8ef2a9a5 | 1852 | |
4cdd0d10 | 1853 | if (!br_multicast_ctx_should_use(brmctx, pmctx) || |
adc47037 | 1854 | !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) || |
4d5b4e84 | 1855 | !brmctx->multicast_querier) |
8ef2a9a5 YH |
1856 | return; |
1857 | ||
eab3227b | 1858 | memset(&br_group.dst, 0, sizeof(br_group.dst)); |
08b202b6 | 1859 | |
adc47037 NA |
1860 | if (pmctx ? (own_query == &pmctx->ip4_own_query) : |
1861 | (own_query == &brmctx->ip4_own_query)) { | |
67b746f9 | 1862 | querier = &brmctx->ip4_querier; |
d3d065c0 | 1863 | other_query = &brmctx->ip4_other_query; |
cc0fdd80 | 1864 | br_group.proto = htons(ETH_P_IP); |
dfd56b8b | 1865 | #if IS_ENABLED(CONFIG_IPV6) |
cc0fdd80 | 1866 | } else { |
67b746f9 | 1867 | querier = &brmctx->ip6_querier; |
d3d065c0 | 1868 | other_query = &brmctx->ip6_other_query; |
cc0fdd80 | 1869 | br_group.proto = htons(ETH_P_IPV6); |
08b202b6 | 1870 | #endif |
cc0fdd80 LL |
1871 | } |
1872 | ||
90010b36 | 1873 | if (!other_query || timer_pending(&other_query->timer)) |
cc0fdd80 LL |
1874 | return; |
1875 | ||
67b746f9 NA |
1876 | /* we're about to select ourselves as querier */ |
1877 | if (!pmctx && querier->port_ifidx) { | |
1878 | struct br_ip zeroip = {}; | |
1879 | ||
1880 | br_multicast_update_querier(brmctx, querier, 0, &zeroip); | |
1881 | } | |
1882 | ||
adc47037 NA |
1883 | __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &br_group, false, |
1884 | 0, NULL); | |
eb1d1641 | 1885 | |
eb1d1641 | 1886 | time = jiffies; |
d3d065c0 NA |
1887 | time += own_query->startup_sent < brmctx->multicast_startup_query_count ? |
1888 | brmctx->multicast_startup_query_interval : | |
1889 | brmctx->multicast_query_interval; | |
90010b36 | 1890 | mod_timer(&own_query->timer, time); |
eb1d1641 HX |
1891 | } |
1892 | ||
90010b36 | 1893 | static void |
9632233e | 1894 | br_multicast_port_query_expired(struct net_bridge_mcast_port *pmctx, |
90010b36 | 1895 | struct bridge_mcast_own_query *query) |
eb1d1641 | 1896 | { |
9632233e | 1897 | struct net_bridge *br = pmctx->port->br; |
4cdd0d10 | 1898 | struct net_bridge_mcast *brmctx; |
eb1d1641 HX |
1899 | |
1900 | spin_lock(&br->multicast_lock); | |
4cdd0d10 | 1901 | if (br_multicast_port_ctx_state_stopped(pmctx)) |
eb1d1641 | 1902 | goto out; |
615cc23e | 1903 | |
4cdd0d10 NA |
1904 | brmctx = br_multicast_port_ctx_get_global(pmctx); |
1905 | if (query->startup_sent < brmctx->multicast_startup_query_count) | |
cc0fdd80 | 1906 | query->startup_sent++; |
eb1d1641 | 1907 | |
4cdd0d10 | 1908 | br_multicast_send_query(brmctx, pmctx, query); |
eb1d1641 HX |
1909 | |
1910 | out: | |
1911 | spin_unlock(&br->multicast_lock); | |
1912 | } | |
1913 | ||
88c1f37f | 1914 | static void br_ip4_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 1915 | { |
9632233e NA |
1916 | struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t, |
1917 | ip4_own_query.timer); | |
cc0fdd80 | 1918 | |
9632233e | 1919 | br_multicast_port_query_expired(pmctx, &pmctx->ip4_own_query); |
cc0fdd80 LL |
1920 | } |
1921 | ||
1922 | #if IS_ENABLED(CONFIG_IPV6) | |
88c1f37f | 1923 | static void br_ip6_multicast_port_query_expired(struct timer_list *t) |
cc0fdd80 | 1924 | { |
9632233e NA |
1925 | struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t, |
1926 | ip6_own_query.timer); | |
cc0fdd80 | 1927 | |
9632233e | 1928 | br_multicast_port_query_expired(pmctx, &pmctx->ip6_own_query); |
cc0fdd80 LL |
1929 | } |
1930 | #endif | |
1931 | ||
42c11ccf NA |
1932 | static void br_multicast_port_group_rexmit(struct timer_list *t) |
1933 | { | |
1934 | struct net_bridge_port_group *pg = from_timer(pg, t, rexmit_timer); | |
1935 | struct bridge_mcast_other_query *other_query = NULL; | |
085b53c8 | 1936 | struct net_bridge *br = pg->key.port->br; |
adc47037 NA |
1937 | struct net_bridge_mcast_port *pmctx; |
1938 | struct net_bridge_mcast *brmctx; | |
42c11ccf NA |
1939 | bool need_rexmit = false; |
1940 | ||
1941 | spin_lock(&br->multicast_lock); | |
1942 | if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) || | |
4d5b4e84 | 1943 | !br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
42c11ccf NA |
1944 | goto out; |
1945 | ||
eb1593a0 NA |
1946 | pmctx = br_multicast_pg_to_port_ctx(pg); |
1947 | if (!pmctx) | |
1948 | goto out; | |
1949 | brmctx = br_multicast_port_ctx_get_global(pmctx); | |
4d5b4e84 NA |
1950 | if (!brmctx->multicast_querier) |
1951 | goto out; | |
1952 | ||
085b53c8 | 1953 | if (pg->key.addr.proto == htons(ETH_P_IP)) |
d3d065c0 | 1954 | other_query = &brmctx->ip4_other_query; |
42c11ccf NA |
1955 | #if IS_ENABLED(CONFIG_IPV6) |
1956 | else | |
d3d065c0 | 1957 | other_query = &brmctx->ip6_other_query; |
42c11ccf NA |
1958 | #endif |
1959 | ||
1960 | if (!other_query || timer_pending(&other_query->timer)) | |
1961 | goto out; | |
1962 | ||
1963 | if (pg->grp_query_rexmit_cnt) { | |
1964 | pg->grp_query_rexmit_cnt--; | |
adc47037 | 1965 | __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr, |
085b53c8 | 1966 | &pg->key.addr, false, 1, NULL); |
42c11ccf | 1967 | } |
adc47037 | 1968 | __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr, |
085b53c8 | 1969 | &pg->key.addr, true, 0, &need_rexmit); |
42c11ccf NA |
1970 | |
1971 | if (pg->grp_query_rexmit_cnt || need_rexmit) | |
1972 | mod_timer(&pg->rexmit_timer, jiffies + | |
d3d065c0 | 1973 | brmctx->multicast_last_member_interval); |
42c11ccf NA |
1974 | out: |
1975 | spin_unlock(&br->multicast_lock); | |
1976 | } | |
1977 | ||
ae1ea84b FF |
1978 | static int br_mc_disabled_update(struct net_device *dev, bool value, |
1979 | struct netlink_ext_ack *extack) | |
147c1e9b NF |
1980 | { |
1981 | struct switchdev_attr attr = { | |
1982 | .orig_dev = dev, | |
1983 | .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED, | |
1984 | .flags = SWITCHDEV_F_DEFER, | |
13cefad2 | 1985 | .u.mc_disabled = !value, |
147c1e9b NF |
1986 | }; |
1987 | ||
ae1ea84b | 1988 | return switchdev_port_attr_set(dev, &attr, extack); |
147c1e9b NF |
1989 | } |
1990 | ||
613d61db NA |
1991 | void br_multicast_port_ctx_init(struct net_bridge_port *port, |
1992 | struct net_bridge_vlan *vlan, | |
1993 | struct net_bridge_mcast_port *pmctx) | |
eb1d1641 | 1994 | { |
9632233e | 1995 | pmctx->port = port; |
613d61db | 1996 | pmctx->vlan = vlan; |
9632233e NA |
1997 | pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
1998 | timer_setup(&pmctx->ip4_mc_router_timer, | |
ee5fb222 | 1999 | br_ip4_multicast_router_expired, 0); |
9632233e | 2000 | timer_setup(&pmctx->ip4_own_query.timer, |
88c1f37f | 2001 | br_ip4_multicast_port_query_expired, 0); |
cc0fdd80 | 2002 | #if IS_ENABLED(CONFIG_IPV6) |
9632233e | 2003 | timer_setup(&pmctx->ip6_mc_router_timer, |
a3c02e76 | 2004 | br_ip6_multicast_router_expired, 0); |
9632233e | 2005 | timer_setup(&pmctx->ip6_own_query.timer, |
88c1f37f | 2006 | br_ip6_multicast_port_query_expired, 0); |
cc0fdd80 | 2007 | #endif |
9632233e NA |
2008 | } |
2009 | ||
613d61db | 2010 | void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) |
9632233e NA |
2011 | { |
2012 | #if IS_ENABLED(CONFIG_IPV6) | |
2013 | del_timer_sync(&pmctx->ip6_mc_router_timer); | |
2014 | #endif | |
2015 | del_timer_sync(&pmctx->ip4_mc_router_timer); | |
2016 | } | |
2017 | ||
2018 | int br_multicast_add_port(struct net_bridge_port *port) | |
2019 | { | |
2020 | int err; | |
2021 | ||
2022 | port->multicast_eht_hosts_limit = BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT; | |
613d61db | 2023 | br_multicast_port_ctx_init(port, NULL, &port->multicast_ctx); |
9632233e | 2024 | |
ae1ea84b FF |
2025 | err = br_mc_disabled_update(port->dev, |
2026 | br_opt_get(port->br, | |
2027 | BROPT_MULTICAST_ENABLED), | |
2028 | NULL); | |
68f5c12a | 2029 | if (err && err != -EOPNOTSUPP) |
ae1ea84b | 2030 | return err; |
147c1e9b | 2031 | |
1080ab95 NA |
2032 | port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); |
2033 | if (!port->mcast_stats) | |
2034 | return -ENOMEM; | |
2035 | ||
2036 | return 0; | |
eb1d1641 HX |
2037 | } |
2038 | ||
2039 | void br_multicast_del_port(struct net_bridge_port *port) | |
2040 | { | |
e10177ab SA |
2041 | struct net_bridge *br = port->br; |
2042 | struct net_bridge_port_group *pg; | |
e12cec65 | 2043 | HLIST_HEAD(deleted_head); |
e10177ab SA |
2044 | struct hlist_node *n; |
2045 | ||
2046 | /* Take care of the remaining groups, only perm ones should be left */ | |
2047 | spin_lock_bh(&br->multicast_lock); | |
2048 | hlist_for_each_entry_safe(pg, n, &port->mglist, mglist) | |
681590bd | 2049 | br_multicast_find_del_pg(br, pg); |
e12cec65 | 2050 | hlist_move_list(&br->mcast_gc_list, &deleted_head); |
e10177ab | 2051 | spin_unlock_bh(&br->multicast_lock); |
e12cec65 | 2052 | br_multicast_gc(&deleted_head); |
9632233e | 2053 | br_multicast_port_ctx_deinit(&port->multicast_ctx); |
1080ab95 | 2054 | free_percpu(port->mcast_stats); |
eb1d1641 HX |
2055 | } |
2056 | ||
90010b36 | 2057 | static void br_multicast_enable(struct bridge_mcast_own_query *query) |
561f1103 | 2058 | { |
cc0fdd80 | 2059 | query->startup_sent = 0; |
561f1103 | 2060 | |
cc0fdd80 LL |
2061 | if (try_to_del_timer_sync(&query->timer) >= 0 || |
2062 | del_timer(&query->timer)) | |
2063 | mod_timer(&query->timer, jiffies); | |
561f1103 HX |
2064 | } |
2065 | ||
adc47037 | 2066 | static void __br_multicast_enable_port_ctx(struct net_bridge_mcast_port *pmctx) |
eb1d1641 | 2067 | { |
adc47037 | 2068 | struct net_bridge *br = pmctx->port->br; |
7b54aaaf | 2069 | struct net_bridge_mcast *brmctx; |
eb1d1641 | 2070 | |
7b54aaaf NA |
2071 | brmctx = br_multicast_port_ctx_get_global(pmctx); |
2072 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || | |
2073 | !netif_running(br->dev)) | |
7cb3f921 | 2074 | return; |
eb1d1641 | 2075 | |
adc47037 | 2076 | br_multicast_enable(&pmctx->ip4_own_query); |
cc0fdd80 | 2077 | #if IS_ENABLED(CONFIG_IPV6) |
adc47037 | 2078 | br_multicast_enable(&pmctx->ip6_own_query); |
cc0fdd80 | 2079 | #endif |
adc47037 NA |
2080 | if (pmctx->multicast_router == MDB_RTR_TYPE_PERM) { |
2081 | br_ip4_multicast_add_router(brmctx, pmctx); | |
2082 | br_ip6_multicast_add_router(brmctx, pmctx); | |
a3c02e76 | 2083 | } |
b57e8d87 PM |
2084 | |
2085 | if (br_multicast_port_ctx_is_vlan(pmctx)) { | |
2086 | struct net_bridge_port_group *pg; | |
2087 | u32 n = 0; | |
2088 | ||
2089 | /* The mcast_n_groups counter might be wrong. First, | |
2090 | * BR_VLFLAG_MCAST_ENABLED is toggled before temporary entries | |
2091 | * are flushed, thus mcast_n_groups after the toggle does not | |
2092 | * reflect the true values. And second, permanent entries added | |
2093 | * while BR_VLFLAG_MCAST_ENABLED was disabled, are not reflected | |
2094 | * either. Thus we have to refresh the counter. | |
2095 | */ | |
2096 | ||
2097 | hlist_for_each_entry(pg, &pmctx->port->mglist, mglist) { | |
2098 | if (pg->key.addr.vid == pmctx->vlan->vid) | |
2099 | n++; | |
2100 | } | |
2101 | WRITE_ONCE(pmctx->mdb_n_entries, n); | |
2102 | } | |
7cb3f921 | 2103 | } |
eb1d1641 | 2104 | |
7cb3f921 NA |
2105 | void br_multicast_enable_port(struct net_bridge_port *port) |
2106 | { | |
2107 | struct net_bridge *br = port->br; | |
2108 | ||
f4b7002a | 2109 | spin_lock_bh(&br->multicast_lock); |
adc47037 | 2110 | __br_multicast_enable_port_ctx(&port->multicast_ctx); |
f4b7002a | 2111 | spin_unlock_bh(&br->multicast_lock); |
eb1d1641 HX |
2112 | } |
2113 | ||
7b54aaaf | 2114 | static void __br_multicast_disable_port_ctx(struct net_bridge_mcast_port *pmctx) |
eb1d1641 | 2115 | { |
eb1d1641 | 2116 | struct net_bridge_port_group *pg; |
b67bfe0d | 2117 | struct hlist_node *n; |
ed2d3597 | 2118 | bool del = false; |
eb1d1641 | 2119 | |
7b54aaaf NA |
2120 | hlist_for_each_entry_safe(pg, n, &pmctx->port->mglist, mglist) |
2121 | if (!(pg->flags & MDB_PG_FLAGS_PERMANENT) && | |
2122 | (!br_multicast_port_ctx_is_vlan(pmctx) || | |
2123 | pg->key.addr.vid == pmctx->vlan->vid)) | |
2124 | br_multicast_find_del_pg(pmctx->port->br, pg); | |
eb1d1641 | 2125 | |
adc47037 NA |
2126 | del |= br_ip4_multicast_rport_del(pmctx); |
2127 | del_timer(&pmctx->ip4_mc_router_timer); | |
2128 | del_timer(&pmctx->ip4_own_query.timer); | |
2129 | del |= br_ip6_multicast_rport_del(pmctx); | |
cc0fdd80 | 2130 | #if IS_ENABLED(CONFIG_IPV6) |
adc47037 NA |
2131 | del_timer(&pmctx->ip6_mc_router_timer); |
2132 | del_timer(&pmctx->ip6_own_query.timer); | |
cc0fdd80 | 2133 | #endif |
adc47037 | 2134 | br_multicast_rport_del_notify(pmctx, del); |
7b54aaaf NA |
2135 | } |
2136 | ||
2137 | void br_multicast_disable_port(struct net_bridge_port *port) | |
2138 | { | |
f4b7002a | 2139 | spin_lock_bh(&port->br->multicast_lock); |
7b54aaaf | 2140 | __br_multicast_disable_port_ctx(&port->multicast_ctx); |
f4b7002a | 2141 | spin_unlock_bh(&port->br->multicast_lock); |
eb1d1641 HX |
2142 | } |
2143 | ||
e6231bca NA |
2144 | static int __grp_src_delete_marked(struct net_bridge_port_group *pg) |
2145 | { | |
2146 | struct net_bridge_group_src *ent; | |
2147 | struct hlist_node *tmp; | |
2148 | int deleted = 0; | |
2149 | ||
2150 | hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node) | |
2151 | if (ent->flags & BR_SGRP_F_DELETE) { | |
d5a10222 | 2152 | br_multicast_del_group_src(ent, false); |
e6231bca NA |
2153 | deleted++; |
2154 | } | |
2155 | ||
2156 | return deleted; | |
2157 | } | |
2158 | ||
b0812368 NA |
2159 | static void __grp_src_mod_timer(struct net_bridge_group_src *src, |
2160 | unsigned long expires) | |
2161 | { | |
2162 | mod_timer(&src->timer, expires); | |
2163 | br_multicast_fwd_src_handle(src); | |
2164 | } | |
2165 | ||
adc47037 NA |
2166 | static void __grp_src_query_marked_and_rexmit(struct net_bridge_mcast *brmctx, |
2167 | struct net_bridge_mcast_port *pmctx, | |
2168 | struct net_bridge_port_group *pg) | |
5bf1e00b NA |
2169 | { |
2170 | struct bridge_mcast_other_query *other_query = NULL; | |
d3d065c0 | 2171 | u32 lmqc = brmctx->multicast_last_member_count; |
5bf1e00b NA |
2172 | unsigned long lmqt, lmi, now = jiffies; |
2173 | struct net_bridge_group_src *ent; | |
2174 | ||
adc47037 NA |
2175 | if (!netif_running(brmctx->br->dev) || |
2176 | !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED)) | |
5bf1e00b NA |
2177 | return; |
2178 | ||
085b53c8 | 2179 | if (pg->key.addr.proto == htons(ETH_P_IP)) |
d3d065c0 | 2180 | other_query = &brmctx->ip4_other_query; |
5bf1e00b NA |
2181 | #if IS_ENABLED(CONFIG_IPV6) |
2182 | else | |
d3d065c0 | 2183 | other_query = &brmctx->ip6_other_query; |
5bf1e00b NA |
2184 | #endif |
2185 | ||
adc47037 | 2186 | lmqt = now + br_multicast_lmqt(brmctx); |
5bf1e00b NA |
2187 | hlist_for_each_entry(ent, &pg->src_list, node) { |
2188 | if (ent->flags & BR_SGRP_F_SEND) { | |
2189 | ent->flags &= ~BR_SGRP_F_SEND; | |
2190 | if (ent->timer.expires > lmqt) { | |
4d5b4e84 | 2191 | if (brmctx->multicast_querier && |
5bf1e00b NA |
2192 | other_query && |
2193 | !timer_pending(&other_query->timer)) | |
2194 | ent->src_query_rexmit_cnt = lmqc; | |
b0812368 | 2195 | __grp_src_mod_timer(ent, lmqt); |
5bf1e00b NA |
2196 | } |
2197 | } | |
2198 | } | |
2199 | ||
4d5b4e84 | 2200 | if (!brmctx->multicast_querier || |
5bf1e00b NA |
2201 | !other_query || timer_pending(&other_query->timer)) |
2202 | return; | |
2203 | ||
adc47037 | 2204 | __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr, |
085b53c8 | 2205 | &pg->key.addr, true, 1, NULL); |
5bf1e00b | 2206 | |
d3d065c0 | 2207 | lmi = now + brmctx->multicast_last_member_interval; |
5bf1e00b NA |
2208 | if (!timer_pending(&pg->rexmit_timer) || |
2209 | time_after(pg->rexmit_timer.expires, lmi)) | |
2210 | mod_timer(&pg->rexmit_timer, lmi); | |
2211 | } | |
2212 | ||
adc47037 NA |
2213 | static void __grp_send_query_and_rexmit(struct net_bridge_mcast *brmctx, |
2214 | struct net_bridge_mcast_port *pmctx, | |
2215 | struct net_bridge_port_group *pg) | |
5bf1e00b NA |
2216 | { |
2217 | struct bridge_mcast_other_query *other_query = NULL; | |
5bf1e00b NA |
2218 | unsigned long now = jiffies, lmi; |
2219 | ||
adc47037 NA |
2220 | if (!netif_running(brmctx->br->dev) || |
2221 | !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED)) | |
5bf1e00b NA |
2222 | return; |
2223 | ||
085b53c8 | 2224 | if (pg->key.addr.proto == htons(ETH_P_IP)) |
d3d065c0 | 2225 | other_query = &brmctx->ip4_other_query; |
5bf1e00b NA |
2226 | #if IS_ENABLED(CONFIG_IPV6) |
2227 | else | |
d3d065c0 | 2228 | other_query = &brmctx->ip6_other_query; |
5bf1e00b NA |
2229 | #endif |
2230 | ||
4d5b4e84 | 2231 | if (brmctx->multicast_querier && |
5bf1e00b | 2232 | other_query && !timer_pending(&other_query->timer)) { |
d3d065c0 NA |
2233 | lmi = now + brmctx->multicast_last_member_interval; |
2234 | pg->grp_query_rexmit_cnt = brmctx->multicast_last_member_count - 1; | |
adc47037 | 2235 | __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr, |
085b53c8 | 2236 | &pg->key.addr, false, 0, NULL); |
5bf1e00b NA |
2237 | if (!timer_pending(&pg->rexmit_timer) || |
2238 | time_after(pg->rexmit_timer.expires, lmi)) | |
2239 | mod_timer(&pg->rexmit_timer, lmi); | |
2240 | } | |
2241 | ||
2242 | if (pg->filter_mode == MCAST_EXCLUDE && | |
2243 | (!timer_pending(&pg->timer) || | |
adc47037 NA |
2244 | time_after(pg->timer.expires, now + br_multicast_lmqt(brmctx)))) |
2245 | mod_timer(&pg->timer, now + br_multicast_lmqt(brmctx)); | |
5bf1e00b NA |
2246 | } |
2247 | ||
0436862e NA |
2248 | /* State Msg type New state Actions |
2249 | * INCLUDE (A) IS_IN (B) INCLUDE (A+B) (B)=GMI | |
2250 | * INCLUDE (A) ALLOW (B) INCLUDE (A+B) (B)=GMI | |
2251 | * EXCLUDE (X,Y) ALLOW (A) EXCLUDE (X+A,Y-A) (A)=GMI | |
2252 | */ | |
adc47037 NA |
2253 | static bool br_multicast_isinc_allow(const struct net_bridge_mcast *brmctx, |
2254 | struct net_bridge_port_group *pg, void *h_addr, | |
474ddb37 NA |
2255 | void *srcs, u32 nsrcs, size_t addr_size, |
2256 | int grec_type) | |
0436862e | 2257 | { |
0436862e NA |
2258 | struct net_bridge_group_src *ent; |
2259 | unsigned long now = jiffies; | |
2260 | bool changed = false; | |
2261 | struct br_ip src_ip; | |
2262 | u32 src_idx; | |
2263 | ||
2264 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2265 | src_ip.proto = pg->key.addr.proto; |
0436862e | 2266 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2267 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
0436862e NA |
2268 | ent = br_multicast_find_group_src(pg, &src_ip); |
2269 | if (!ent) { | |
2270 | ent = br_multicast_new_group_src(pg, &src_ip); | |
2271 | if (ent) | |
2272 | changed = true; | |
2273 | } | |
2274 | ||
2275 | if (ent) | |
adc47037 | 2276 | __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx)); |
0436862e NA |
2277 | } |
2278 | ||
adc47037 NA |
2279 | if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size, |
2280 | grec_type)) | |
474ddb37 NA |
2281 | changed = true; |
2282 | ||
0436862e NA |
2283 | return changed; |
2284 | } | |
2285 | ||
e6231bca NA |
2286 | /* State Msg type New state Actions |
2287 | * INCLUDE (A) IS_EX (B) EXCLUDE (A*B,B-A) (B-A)=0 | |
2288 | * Delete (A-B) | |
2289 | * Group Timer=GMI | |
2290 | */ | |
adc47037 NA |
2291 | static void __grp_src_isexc_incl(const struct net_bridge_mcast *brmctx, |
2292 | struct net_bridge_port_group *pg, void *h_addr, | |
ddc255d9 NA |
2293 | void *srcs, u32 nsrcs, size_t addr_size, |
2294 | int grec_type) | |
e6231bca NA |
2295 | { |
2296 | struct net_bridge_group_src *ent; | |
2297 | struct br_ip src_ip; | |
2298 | u32 src_idx; | |
2299 | ||
2300 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2301 | ent->flags |= BR_SGRP_F_DELETE; | |
2302 | ||
2303 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2304 | src_ip.proto = pg->key.addr.proto; |
e6231bca | 2305 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2306 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
e6231bca NA |
2307 | ent = br_multicast_find_group_src(pg, &src_ip); |
2308 | if (ent) | |
2309 | ent->flags &= ~BR_SGRP_F_DELETE; | |
2310 | else | |
b0812368 NA |
2311 | ent = br_multicast_new_group_src(pg, &src_ip); |
2312 | if (ent) | |
2313 | br_multicast_fwd_src_handle(ent); | |
e6231bca NA |
2314 | } |
2315 | ||
adc47037 NA |
2316 | br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size, |
2317 | grec_type); | |
ddc255d9 | 2318 | |
e6231bca NA |
2319 | __grp_src_delete_marked(pg); |
2320 | } | |
2321 | ||
2322 | /* State Msg type New state Actions | |
2323 | * EXCLUDE (X,Y) IS_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=GMI | |
2324 | * Delete (X-A) | |
2325 | * Delete (Y-A) | |
2326 | * Group Timer=GMI | |
2327 | */ | |
adc47037 NA |
2328 | static bool __grp_src_isexc_excl(const struct net_bridge_mcast *brmctx, |
2329 | struct net_bridge_port_group *pg, void *h_addr, | |
ddc255d9 NA |
2330 | void *srcs, u32 nsrcs, size_t addr_size, |
2331 | int grec_type) | |
e6231bca | 2332 | { |
e6231bca NA |
2333 | struct net_bridge_group_src *ent; |
2334 | unsigned long now = jiffies; | |
2335 | bool changed = false; | |
2336 | struct br_ip src_ip; | |
2337 | u32 src_idx; | |
2338 | ||
2339 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2340 | ent->flags |= BR_SGRP_F_DELETE; | |
2341 | ||
2342 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2343 | src_ip.proto = pg->key.addr.proto; |
e6231bca | 2344 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2345 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
e6231bca NA |
2346 | ent = br_multicast_find_group_src(pg, &src_ip); |
2347 | if (ent) { | |
2348 | ent->flags &= ~BR_SGRP_F_DELETE; | |
2349 | } else { | |
2350 | ent = br_multicast_new_group_src(pg, &src_ip); | |
2351 | if (ent) { | |
b0812368 | 2352 | __grp_src_mod_timer(ent, |
adc47037 | 2353 | now + br_multicast_gmi(brmctx)); |
e6231bca NA |
2354 | changed = true; |
2355 | } | |
2356 | } | |
e6231bca NA |
2357 | } |
2358 | ||
adc47037 NA |
2359 | if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size, |
2360 | grec_type)) | |
ddc255d9 NA |
2361 | changed = true; |
2362 | ||
e6231bca NA |
2363 | if (__grp_src_delete_marked(pg)) |
2364 | changed = true; | |
2365 | ||
2366 | return changed; | |
2367 | } | |
2368 | ||
adc47037 NA |
2369 | static bool br_multicast_isexc(const struct net_bridge_mcast *brmctx, |
2370 | struct net_bridge_port_group *pg, void *h_addr, | |
ddc255d9 NA |
2371 | void *srcs, u32 nsrcs, size_t addr_size, |
2372 | int grec_type) | |
e6231bca | 2373 | { |
e6231bca NA |
2374 | bool changed = false; |
2375 | ||
2376 | switch (pg->filter_mode) { | |
2377 | case MCAST_INCLUDE: | |
adc47037 | 2378 | __grp_src_isexc_incl(brmctx, pg, h_addr, srcs, nsrcs, addr_size, |
ddc255d9 | 2379 | grec_type); |
8266a049 | 2380 | br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE); |
e6231bca NA |
2381 | changed = true; |
2382 | break; | |
2383 | case MCAST_EXCLUDE: | |
adc47037 NA |
2384 | changed = __grp_src_isexc_excl(brmctx, pg, h_addr, srcs, nsrcs, |
2385 | addr_size, grec_type); | |
e6231bca NA |
2386 | break; |
2387 | } | |
2388 | ||
2389 | pg->filter_mode = MCAST_EXCLUDE; | |
adc47037 | 2390 | mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx)); |
e6231bca NA |
2391 | |
2392 | return changed; | |
2393 | } | |
2394 | ||
5bf1e00b NA |
2395 | /* State Msg type New state Actions |
2396 | * INCLUDE (A) TO_IN (B) INCLUDE (A+B) (B)=GMI | |
2397 | * Send Q(G,A-B) | |
2398 | */ | |
adc47037 NA |
2399 | static bool __grp_src_toin_incl(struct net_bridge_mcast *brmctx, |
2400 | struct net_bridge_mcast_port *pmctx, | |
2401 | struct net_bridge_port_group *pg, void *h_addr, | |
ddc255d9 NA |
2402 | void *srcs, u32 nsrcs, size_t addr_size, |
2403 | int grec_type) | |
5bf1e00b | 2404 | { |
5bf1e00b NA |
2405 | u32 src_idx, to_send = pg->src_ents; |
2406 | struct net_bridge_group_src *ent; | |
2407 | unsigned long now = jiffies; | |
2408 | bool changed = false; | |
2409 | struct br_ip src_ip; | |
2410 | ||
2411 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2412 | ent->flags |= BR_SGRP_F_SEND; | |
2413 | ||
2414 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2415 | src_ip.proto = pg->key.addr.proto; |
5bf1e00b | 2416 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2417 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
5bf1e00b NA |
2418 | ent = br_multicast_find_group_src(pg, &src_ip); |
2419 | if (ent) { | |
2420 | ent->flags &= ~BR_SGRP_F_SEND; | |
2421 | to_send--; | |
2422 | } else { | |
2423 | ent = br_multicast_new_group_src(pg, &src_ip); | |
2424 | if (ent) | |
2425 | changed = true; | |
2426 | } | |
2427 | if (ent) | |
adc47037 | 2428 | __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx)); |
5bf1e00b NA |
2429 | } |
2430 | ||
adc47037 NA |
2431 | if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size, |
2432 | grec_type)) | |
ddc255d9 NA |
2433 | changed = true; |
2434 | ||
5bf1e00b | 2435 | if (to_send) |
adc47037 | 2436 | __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg); |
5bf1e00b NA |
2437 | |
2438 | return changed; | |
2439 | } | |
2440 | ||
2441 | /* State Msg type New state Actions | |
2442 | * EXCLUDE (X,Y) TO_IN (A) EXCLUDE (X+A,Y-A) (A)=GMI | |
2443 | * Send Q(G,X-A) | |
2444 | * Send Q(G) | |
2445 | */ | |
adc47037 NA |
2446 | static bool __grp_src_toin_excl(struct net_bridge_mcast *brmctx, |
2447 | struct net_bridge_mcast_port *pmctx, | |
2448 | struct net_bridge_port_group *pg, void *h_addr, | |
ddc255d9 NA |
2449 | void *srcs, u32 nsrcs, size_t addr_size, |
2450 | int grec_type) | |
5bf1e00b | 2451 | { |
5bf1e00b NA |
2452 | u32 src_idx, to_send = pg->src_ents; |
2453 | struct net_bridge_group_src *ent; | |
2454 | unsigned long now = jiffies; | |
2455 | bool changed = false; | |
2456 | struct br_ip src_ip; | |
2457 | ||
2458 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2459 | if (timer_pending(&ent->timer)) | |
2460 | ent->flags |= BR_SGRP_F_SEND; | |
2461 | ||
2462 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2463 | src_ip.proto = pg->key.addr.proto; |
5bf1e00b | 2464 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2465 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
5bf1e00b NA |
2466 | ent = br_multicast_find_group_src(pg, &src_ip); |
2467 | if (ent) { | |
2468 | if (timer_pending(&ent->timer)) { | |
2469 | ent->flags &= ~BR_SGRP_F_SEND; | |
2470 | to_send--; | |
2471 | } | |
2472 | } else { | |
2473 | ent = br_multicast_new_group_src(pg, &src_ip); | |
2474 | if (ent) | |
2475 | changed = true; | |
2476 | } | |
2477 | if (ent) | |
adc47037 | 2478 | __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx)); |
5bf1e00b NA |
2479 | } |
2480 | ||
adc47037 NA |
2481 | if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size, |
2482 | grec_type)) | |
ddc255d9 NA |
2483 | changed = true; |
2484 | ||
5bf1e00b | 2485 | if (to_send) |
adc47037 | 2486 | __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg); |
5bf1e00b | 2487 | |
adc47037 | 2488 | __grp_send_query_and_rexmit(brmctx, pmctx, pg); |
5bf1e00b NA |
2489 | |
2490 | return changed; | |
2491 | } | |
2492 | ||
adc47037 NA |
2493 | static bool br_multicast_toin(struct net_bridge_mcast *brmctx, |
2494 | struct net_bridge_mcast_port *pmctx, | |
2495 | struct net_bridge_port_group *pg, void *h_addr, | |
ddc255d9 NA |
2496 | void *srcs, u32 nsrcs, size_t addr_size, |
2497 | int grec_type) | |
5bf1e00b NA |
2498 | { |
2499 | bool changed = false; | |
2500 | ||
2501 | switch (pg->filter_mode) { | |
2502 | case MCAST_INCLUDE: | |
adc47037 NA |
2503 | changed = __grp_src_toin_incl(brmctx, pmctx, pg, h_addr, srcs, |
2504 | nsrcs, addr_size, grec_type); | |
5bf1e00b NA |
2505 | break; |
2506 | case MCAST_EXCLUDE: | |
adc47037 NA |
2507 | changed = __grp_src_toin_excl(brmctx, pmctx, pg, h_addr, srcs, |
2508 | nsrcs, addr_size, grec_type); | |
5bf1e00b NA |
2509 | break; |
2510 | } | |
2511 | ||
ddc255d9 | 2512 | if (br_multicast_eht_should_del_pg(pg)) { |
d5a10222 | 2513 | pg->flags |= MDB_PG_FLAGS_FAST_LEAVE; |
ddc255d9 NA |
2514 | br_multicast_find_del_pg(pg->key.port->br, pg); |
2515 | /* a notification has already been sent and we shouldn't | |
2516 | * access pg after the delete so we have to return false | |
2517 | */ | |
2518 | changed = false; | |
2519 | } | |
2520 | ||
5bf1e00b NA |
2521 | return changed; |
2522 | } | |
2523 | ||
2524 | /* State Msg type New state Actions | |
2525 | * INCLUDE (A) TO_EX (B) EXCLUDE (A*B,B-A) (B-A)=0 | |
2526 | * Delete (A-B) | |
2527 | * Send Q(G,A*B) | |
2528 | * Group Timer=GMI | |
2529 | */ | |
adc47037 NA |
2530 | static void __grp_src_toex_incl(struct net_bridge_mcast *brmctx, |
2531 | struct net_bridge_mcast_port *pmctx, | |
2532 | struct net_bridge_port_group *pg, void *h_addr, | |
ddc255d9 NA |
2533 | void *srcs, u32 nsrcs, size_t addr_size, |
2534 | int grec_type) | |
5bf1e00b NA |
2535 | { |
2536 | struct net_bridge_group_src *ent; | |
2537 | u32 src_idx, to_send = 0; | |
2538 | struct br_ip src_ip; | |
2539 | ||
2540 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2541 | ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE; | |
2542 | ||
2543 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2544 | src_ip.proto = pg->key.addr.proto; |
5bf1e00b | 2545 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2546 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
5bf1e00b NA |
2547 | ent = br_multicast_find_group_src(pg, &src_ip); |
2548 | if (ent) { | |
2549 | ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) | | |
2550 | BR_SGRP_F_SEND; | |
2551 | to_send++; | |
2552 | } else { | |
b0812368 | 2553 | ent = br_multicast_new_group_src(pg, &src_ip); |
5bf1e00b | 2554 | } |
b0812368 NA |
2555 | if (ent) |
2556 | br_multicast_fwd_src_handle(ent); | |
5bf1e00b NA |
2557 | } |
2558 | ||
adc47037 NA |
2559 | br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size, |
2560 | grec_type); | |
ddc255d9 | 2561 | |
5bf1e00b NA |
2562 | __grp_src_delete_marked(pg); |
2563 | if (to_send) | |
adc47037 | 2564 | __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg); |
5bf1e00b NA |
2565 | } |
2566 | ||
2567 | /* State Msg type New state Actions | |
2568 | * EXCLUDE (X,Y) TO_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=Group Timer | |
2569 | * Delete (X-A) | |
2570 | * Delete (Y-A) | |
2571 | * Send Q(G,A-Y) | |
2572 | * Group Timer=GMI | |
2573 | */ | |
adc47037 NA |
2574 | static bool __grp_src_toex_excl(struct net_bridge_mcast *brmctx, |
2575 | struct net_bridge_mcast_port *pmctx, | |
2576 | struct net_bridge_port_group *pg, void *h_addr, | |
ddc255d9 NA |
2577 | void *srcs, u32 nsrcs, size_t addr_size, |
2578 | int grec_type) | |
5bf1e00b NA |
2579 | { |
2580 | struct net_bridge_group_src *ent; | |
2581 | u32 src_idx, to_send = 0; | |
2582 | bool changed = false; | |
2583 | struct br_ip src_ip; | |
2584 | ||
2585 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2586 | ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE; | |
2587 | ||
2588 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2589 | src_ip.proto = pg->key.addr.proto; |
5bf1e00b | 2590 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2591 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
5bf1e00b NA |
2592 | ent = br_multicast_find_group_src(pg, &src_ip); |
2593 | if (ent) { | |
2594 | ent->flags &= ~BR_SGRP_F_DELETE; | |
2595 | } else { | |
2596 | ent = br_multicast_new_group_src(pg, &src_ip); | |
2597 | if (ent) { | |
b0812368 | 2598 | __grp_src_mod_timer(ent, pg->timer.expires); |
5bf1e00b NA |
2599 | changed = true; |
2600 | } | |
2601 | } | |
2602 | if (ent && timer_pending(&ent->timer)) { | |
2603 | ent->flags |= BR_SGRP_F_SEND; | |
2604 | to_send++; | |
2605 | } | |
5bf1e00b NA |
2606 | } |
2607 | ||
adc47037 NA |
2608 | if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size, |
2609 | grec_type)) | |
ddc255d9 NA |
2610 | changed = true; |
2611 | ||
5bf1e00b NA |
2612 | if (__grp_src_delete_marked(pg)) |
2613 | changed = true; | |
2614 | if (to_send) | |
adc47037 | 2615 | __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg); |
5bf1e00b NA |
2616 | |
2617 | return changed; | |
2618 | } | |
2619 | ||
adc47037 NA |
2620 | static bool br_multicast_toex(struct net_bridge_mcast *brmctx, |
2621 | struct net_bridge_mcast_port *pmctx, | |
2622 | struct net_bridge_port_group *pg, void *h_addr, | |
ddc255d9 NA |
2623 | void *srcs, u32 nsrcs, size_t addr_size, |
2624 | int grec_type) | |
5bf1e00b | 2625 | { |
5bf1e00b NA |
2626 | bool changed = false; |
2627 | ||
2628 | switch (pg->filter_mode) { | |
2629 | case MCAST_INCLUDE: | |
adc47037 NA |
2630 | __grp_src_toex_incl(brmctx, pmctx, pg, h_addr, srcs, nsrcs, |
2631 | addr_size, grec_type); | |
8266a049 | 2632 | br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE); |
5bf1e00b NA |
2633 | changed = true; |
2634 | break; | |
2635 | case MCAST_EXCLUDE: | |
adc47037 NA |
2636 | changed = __grp_src_toex_excl(brmctx, pmctx, pg, h_addr, srcs, |
2637 | nsrcs, addr_size, grec_type); | |
5bf1e00b NA |
2638 | break; |
2639 | } | |
2640 | ||
2641 | pg->filter_mode = MCAST_EXCLUDE; | |
adc47037 | 2642 | mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx)); |
5bf1e00b NA |
2643 | |
2644 | return changed; | |
2645 | } | |
2646 | ||
109865fe NA |
2647 | /* State Msg type New state Actions |
2648 | * INCLUDE (A) BLOCK (B) INCLUDE (A) Send Q(G,A*B) | |
2649 | */ | |
adc47037 NA |
2650 | static bool __grp_src_block_incl(struct net_bridge_mcast *brmctx, |
2651 | struct net_bridge_mcast_port *pmctx, | |
2652 | struct net_bridge_port_group *pg, void *h_addr, | |
474ddb37 | 2653 | void *srcs, u32 nsrcs, size_t addr_size, int grec_type) |
109865fe NA |
2654 | { |
2655 | struct net_bridge_group_src *ent; | |
2656 | u32 src_idx, to_send = 0; | |
0ad57c99 | 2657 | bool changed = false; |
109865fe NA |
2658 | struct br_ip src_ip; |
2659 | ||
2660 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2661 | ent->flags &= ~BR_SGRP_F_SEND; | |
2662 | ||
2663 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2664 | src_ip.proto = pg->key.addr.proto; |
109865fe | 2665 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2666 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
109865fe NA |
2667 | ent = br_multicast_find_group_src(pg, &src_ip); |
2668 | if (ent) { | |
2669 | ent->flags |= BR_SGRP_F_SEND; | |
2670 | to_send++; | |
2671 | } | |
109865fe NA |
2672 | } |
2673 | ||
adc47037 NA |
2674 | if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size, |
2675 | grec_type)) | |
474ddb37 NA |
2676 | changed = true; |
2677 | ||
109865fe | 2678 | if (to_send) |
adc47037 | 2679 | __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg); |
109865fe | 2680 | |
0ad57c99 | 2681 | return changed; |
109865fe NA |
2682 | } |
2683 | ||
2684 | /* State Msg type New state Actions | |
2685 | * EXCLUDE (X,Y) BLOCK (A) EXCLUDE (X+(A-Y),Y) (A-X-Y)=Group Timer | |
2686 | * Send Q(G,A-Y) | |
2687 | */ | |
adc47037 NA |
2688 | static bool __grp_src_block_excl(struct net_bridge_mcast *brmctx, |
2689 | struct net_bridge_mcast_port *pmctx, | |
2690 | struct net_bridge_port_group *pg, void *h_addr, | |
474ddb37 | 2691 | void *srcs, u32 nsrcs, size_t addr_size, int grec_type) |
109865fe NA |
2692 | { |
2693 | struct net_bridge_group_src *ent; | |
2694 | u32 src_idx, to_send = 0; | |
2695 | bool changed = false; | |
2696 | struct br_ip src_ip; | |
2697 | ||
2698 | hlist_for_each_entry(ent, &pg->src_list, node) | |
2699 | ent->flags &= ~BR_SGRP_F_SEND; | |
2700 | ||
2701 | memset(&src_ip, 0, sizeof(src_ip)); | |
085b53c8 | 2702 | src_ip.proto = pg->key.addr.proto; |
109865fe | 2703 | for (src_idx = 0; src_idx < nsrcs; src_idx++) { |
e7cfcf2c | 2704 | memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size); |
109865fe NA |
2705 | ent = br_multicast_find_group_src(pg, &src_ip); |
2706 | if (!ent) { | |
2707 | ent = br_multicast_new_group_src(pg, &src_ip); | |
2708 | if (ent) { | |
b0812368 | 2709 | __grp_src_mod_timer(ent, pg->timer.expires); |
109865fe NA |
2710 | changed = true; |
2711 | } | |
2712 | } | |
2713 | if (ent && timer_pending(&ent->timer)) { | |
2714 | ent->flags |= BR_SGRP_F_SEND; | |
2715 | to_send++; | |
2716 | } | |
109865fe NA |
2717 | } |
2718 | ||
adc47037 NA |
2719 | if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size, |
2720 | grec_type)) | |
474ddb37 NA |
2721 | changed = true; |
2722 | ||
109865fe | 2723 | if (to_send) |
adc47037 | 2724 | __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg); |
109865fe NA |
2725 | |
2726 | return changed; | |
2727 | } | |
2728 | ||
adc47037 NA |
2729 | static bool br_multicast_block(struct net_bridge_mcast *brmctx, |
2730 | struct net_bridge_mcast_port *pmctx, | |
2731 | struct net_bridge_port_group *pg, void *h_addr, | |
474ddb37 | 2732 | void *srcs, u32 nsrcs, size_t addr_size, int grec_type) |
109865fe NA |
2733 | { |
2734 | bool changed = false; | |
2735 | ||
2736 | switch (pg->filter_mode) { | |
2737 | case MCAST_INCLUDE: | |
adc47037 NA |
2738 | changed = __grp_src_block_incl(brmctx, pmctx, pg, h_addr, srcs, |
2739 | nsrcs, addr_size, grec_type); | |
109865fe NA |
2740 | break; |
2741 | case MCAST_EXCLUDE: | |
adc47037 NA |
2742 | changed = __grp_src_block_excl(brmctx, pmctx, pg, h_addr, srcs, |
2743 | nsrcs, addr_size, grec_type); | |
109865fe NA |
2744 | break; |
2745 | } | |
2746 | ||
e87e4b5c NA |
2747 | if ((pg->filter_mode == MCAST_INCLUDE && hlist_empty(&pg->src_list)) || |
2748 | br_multicast_eht_should_del_pg(pg)) { | |
d5a10222 NA |
2749 | if (br_multicast_eht_should_del_pg(pg)) |
2750 | pg->flags |= MDB_PG_FLAGS_FAST_LEAVE; | |
e87e4b5c NA |
2751 | br_multicast_find_del_pg(pg->key.port->br, pg); |
2752 | /* a notification has already been sent and we shouldn't | |
2753 | * access pg after the delete so we have to return false | |
2754 | */ | |
2755 | changed = false; | |
2756 | } | |
2757 | ||
109865fe NA |
2758 | return changed; |
2759 | } | |
2760 | ||
0436862e NA |
2761 | static struct net_bridge_port_group * |
2762 | br_multicast_find_port(struct net_bridge_mdb_entry *mp, | |
2763 | struct net_bridge_port *p, | |
2764 | const unsigned char *src) | |
2765 | { | |
071445c6 | 2766 | struct net_bridge *br __maybe_unused = mp->br; |
0436862e | 2767 | struct net_bridge_port_group *pg; |
0436862e NA |
2768 | |
2769 | for (pg = mlock_dereference(mp->ports, br); | |
2770 | pg; | |
2771 | pg = mlock_dereference(pg->next, br)) | |
2772 | if (br_port_group_equal(pg, p, src)) | |
2773 | return pg; | |
2774 | ||
2775 | return NULL; | |
2776 | } | |
2777 | ||
adc47037 NA |
2778 | static int br_ip4_multicast_igmp3_report(struct net_bridge_mcast *brmctx, |
2779 | struct net_bridge_mcast_port *pmctx, | |
06499098 VY |
2780 | struct sk_buff *skb, |
2781 | u16 vid) | |
eb1d1641 | 2782 | { |
adc47037 | 2783 | bool igmpv2 = brmctx->multicast_igmp_version == 2; |
0436862e NA |
2784 | struct net_bridge_mdb_entry *mdst; |
2785 | struct net_bridge_port_group *pg; | |
6db6f0ea | 2786 | const unsigned char *src; |
eb1d1641 HX |
2787 | struct igmpv3_report *ih; |
2788 | struct igmpv3_grec *grec; | |
0436862e | 2789 | int i, len, num, type; |
54bea721 | 2790 | __be32 group, *h_addr; |
0436862e | 2791 | bool changed = false; |
0436862e | 2792 | int err = 0; |
e57f6185 | 2793 | u16 nsrcs; |
eb1d1641 | 2794 | |
eb1d1641 HX |
2795 | ih = igmpv3_report_hdr(skb); |
2796 | num = ntohs(ih->ngrec); | |
c2d4fbd2 | 2797 | len = skb_transport_offset(skb) + sizeof(*ih); |
eb1d1641 HX |
2798 | |
2799 | for (i = 0; i < num; i++) { | |
2800 | len += sizeof(*grec); | |
ba5ea614 | 2801 | if (!ip_mc_may_pull(skb, len)) |
eb1d1641 HX |
2802 | return -EINVAL; |
2803 | ||
fd218cf9 | 2804 | grec = (void *)(skb->data + len - sizeof(*grec)); |
eb1d1641 HX |
2805 | group = grec->grec_mca; |
2806 | type = grec->grec_type; | |
e57f6185 | 2807 | nsrcs = ntohs(grec->grec_nsrcs); |
eb1d1641 | 2808 | |
e57f6185 | 2809 | len += nsrcs * 4; |
ba5ea614 | 2810 | if (!ip_mc_may_pull(skb, len)) |
eb1d1641 HX |
2811 | return -EINVAL; |
2812 | ||
eb1d1641 HX |
2813 | switch (type) { |
2814 | case IGMPV3_MODE_IS_INCLUDE: | |
2815 | case IGMPV3_MODE_IS_EXCLUDE: | |
2816 | case IGMPV3_CHANGE_TO_INCLUDE: | |
2817 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
2818 | case IGMPV3_ALLOW_NEW_SOURCES: | |
2819 | case IGMPV3_BLOCK_OLD_SOURCES: | |
2820 | break; | |
2821 | ||
2822 | default: | |
2823 | continue; | |
2824 | } | |
2825 | ||
6db6f0ea | 2826 | src = eth_hdr(skb)->h_source; |
0436862e NA |
2827 | if (nsrcs == 0 && |
2828 | (type == IGMPV3_CHANGE_TO_INCLUDE || | |
2829 | type == IGMPV3_MODE_IS_INCLUDE)) { | |
adc47037 NA |
2830 | if (!pmctx || igmpv2) { |
2831 | br_ip4_multicast_leave_group(brmctx, pmctx, | |
2832 | group, vid, src); | |
0436862e NA |
2833 | continue; |
2834 | } | |
bc8c20ac | 2835 | } else { |
adc47037 NA |
2836 | err = br_ip4_multicast_add_group(brmctx, pmctx, group, |
2837 | vid, src, igmpv2); | |
bc8c20ac SA |
2838 | if (err) |
2839 | break; | |
2840 | } | |
0436862e | 2841 | |
adc47037 | 2842 | if (!pmctx || igmpv2) |
0436862e NA |
2843 | continue; |
2844 | ||
262985fa | 2845 | spin_lock(&brmctx->br->multicast_lock); |
4cdd0d10 NA |
2846 | if (!br_multicast_ctx_should_use(brmctx, pmctx)) |
2847 | goto unlock_continue; | |
2848 | ||
adc47037 | 2849 | mdst = br_mdb_ip4_get(brmctx->br, group, vid); |
0436862e NA |
2850 | if (!mdst) |
2851 | goto unlock_continue; | |
adc47037 | 2852 | pg = br_multicast_find_port(mdst, pmctx->port, src); |
0436862e NA |
2853 | if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT)) |
2854 | goto unlock_continue; | |
54bea721 | 2855 | /* reload grec and host addr */ |
0436862e | 2856 | grec = (void *)(skb->data + len - sizeof(*grec) - (nsrcs * 4)); |
54bea721 | 2857 | h_addr = &ip_hdr(skb)->saddr; |
0436862e NA |
2858 | switch (type) { |
2859 | case IGMPV3_ALLOW_NEW_SOURCES: | |
adc47037 NA |
2860 | changed = br_multicast_isinc_allow(brmctx, pg, h_addr, |
2861 | grec->grec_src, | |
474ddb37 | 2862 | nsrcs, sizeof(__be32), type); |
0436862e | 2863 | break; |
e6231bca | 2864 | case IGMPV3_MODE_IS_INCLUDE: |
adc47037 NA |
2865 | changed = br_multicast_isinc_allow(brmctx, pg, h_addr, |
2866 | grec->grec_src, | |
474ddb37 | 2867 | nsrcs, sizeof(__be32), type); |
e6231bca NA |
2868 | break; |
2869 | case IGMPV3_MODE_IS_EXCLUDE: | |
adc47037 NA |
2870 | changed = br_multicast_isexc(brmctx, pg, h_addr, |
2871 | grec->grec_src, | |
ddc255d9 | 2872 | nsrcs, sizeof(__be32), type); |
e6231bca | 2873 | break; |
5bf1e00b | 2874 | case IGMPV3_CHANGE_TO_INCLUDE: |
adc47037 NA |
2875 | changed = br_multicast_toin(brmctx, pmctx, pg, h_addr, |
2876 | grec->grec_src, | |
ddc255d9 | 2877 | nsrcs, sizeof(__be32), type); |
5bf1e00b NA |
2878 | break; |
2879 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
adc47037 NA |
2880 | changed = br_multicast_toex(brmctx, pmctx, pg, h_addr, |
2881 | grec->grec_src, | |
ddc255d9 | 2882 | nsrcs, sizeof(__be32), type); |
5bf1e00b | 2883 | break; |
109865fe | 2884 | case IGMPV3_BLOCK_OLD_SOURCES: |
adc47037 NA |
2885 | changed = br_multicast_block(brmctx, pmctx, pg, h_addr, |
2886 | grec->grec_src, | |
474ddb37 | 2887 | nsrcs, sizeof(__be32), type); |
109865fe | 2888 | break; |
0436862e NA |
2889 | } |
2890 | if (changed) | |
adc47037 | 2891 | br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB); |
0436862e | 2892 | unlock_continue: |
262985fa | 2893 | spin_unlock(&brmctx->br->multicast_lock); |
eb1d1641 HX |
2894 | } |
2895 | ||
2896 | return err; | |
2897 | } | |
2898 | ||
dfd56b8b | 2899 | #if IS_ENABLED(CONFIG_IPV6) |
adc47037 NA |
2900 | static int br_ip6_multicast_mld2_report(struct net_bridge_mcast *brmctx, |
2901 | struct net_bridge_mcast_port *pmctx, | |
06499098 VY |
2902 | struct sk_buff *skb, |
2903 | u16 vid) | |
08b202b6 | 2904 | { |
adc47037 | 2905 | bool mldv1 = brmctx->multicast_mld_version == 1; |
0436862e NA |
2906 | struct net_bridge_mdb_entry *mdst; |
2907 | struct net_bridge_port_group *pg; | |
ba5ea614 | 2908 | unsigned int nsrcs_offset; |
6baeb395 | 2909 | struct mld2_report *mld2r; |
6db6f0ea | 2910 | const unsigned char *src; |
54bea721 | 2911 | struct in6_addr *h_addr; |
08b202b6 | 2912 | struct mld2_grec *grec; |
ba5ea614 | 2913 | unsigned int grec_len; |
0436862e NA |
2914 | bool changed = false; |
2915 | int i, len, num; | |
08b202b6 YH |
2916 | int err = 0; |
2917 | ||
6baeb395 | 2918 | if (!ipv6_mc_may_pull(skb, sizeof(*mld2r))) |
08b202b6 YH |
2919 | return -EINVAL; |
2920 | ||
6baeb395 M |
2921 | mld2r = (struct mld2_report *)icmp6_hdr(skb); |
2922 | num = ntohs(mld2r->mld2r_ngrec); | |
2923 | len = skb_transport_offset(skb) + sizeof(*mld2r); | |
08b202b6 YH |
2924 | |
2925 | for (i = 0; i < num; i++) { | |
e57f6185 NA |
2926 | __be16 *_nsrcs, __nsrcs; |
2927 | u16 nsrcs; | |
08b202b6 | 2928 | |
ba5ea614 LL |
2929 | nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs); |
2930 | ||
2931 | if (skb_transport_offset(skb) + ipv6_transport_len(skb) < | |
5fc6266a | 2932 | nsrcs_offset + sizeof(__nsrcs)) |
ba5ea614 LL |
2933 | return -EINVAL; |
2934 | ||
e57f6185 NA |
2935 | _nsrcs = skb_header_pointer(skb, nsrcs_offset, |
2936 | sizeof(__nsrcs), &__nsrcs); | |
2937 | if (!_nsrcs) | |
08b202b6 YH |
2938 | return -EINVAL; |
2939 | ||
e57f6185 NA |
2940 | nsrcs = ntohs(*_nsrcs); |
2941 | grec_len = struct_size(grec, grec_src, nsrcs); | |
ba5ea614 LL |
2942 | |
2943 | if (!ipv6_mc_may_pull(skb, len + grec_len)) | |
08b202b6 YH |
2944 | return -EINVAL; |
2945 | ||
2946 | grec = (struct mld2_grec *)(skb->data + len); | |
ba5ea614 | 2947 | len += grec_len; |
08b202b6 | 2948 | |
08b202b6 YH |
2949 | switch (grec->grec_type) { |
2950 | case MLD2_MODE_IS_INCLUDE: | |
2951 | case MLD2_MODE_IS_EXCLUDE: | |
2952 | case MLD2_CHANGE_TO_INCLUDE: | |
2953 | case MLD2_CHANGE_TO_EXCLUDE: | |
2954 | case MLD2_ALLOW_NEW_SOURCES: | |
2955 | case MLD2_BLOCK_OLD_SOURCES: | |
2956 | break; | |
2957 | ||
2958 | default: | |
2959 | continue; | |
2960 | } | |
2961 | ||
6db6f0ea | 2962 | src = eth_hdr(skb)->h_source; |
bc8c20ac SA |
2963 | if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE || |
2964 | grec->grec_type == MLD2_MODE_IS_INCLUDE) && | |
e57f6185 | 2965 | nsrcs == 0) { |
adc47037 NA |
2966 | if (!pmctx || mldv1) { |
2967 | br_ip6_multicast_leave_group(brmctx, pmctx, | |
0436862e NA |
2968 | &grec->grec_mca, |
2969 | vid, src); | |
2970 | continue; | |
2971 | } | |
bc8c20ac | 2972 | } else { |
adc47037 | 2973 | err = br_ip6_multicast_add_group(brmctx, pmctx, |
6db6f0ea | 2974 | &grec->grec_mca, vid, |
0436862e | 2975 | src, mldv1); |
9264251e | 2976 | if (err) |
bc8c20ac SA |
2977 | break; |
2978 | } | |
0436862e | 2979 | |
adc47037 | 2980 | if (!pmctx || mldv1) |
0436862e NA |
2981 | continue; |
2982 | ||
262985fa | 2983 | spin_lock(&brmctx->br->multicast_lock); |
4cdd0d10 NA |
2984 | if (!br_multicast_ctx_should_use(brmctx, pmctx)) |
2985 | goto unlock_continue; | |
2986 | ||
adc47037 | 2987 | mdst = br_mdb_ip6_get(brmctx->br, &grec->grec_mca, vid); |
0436862e NA |
2988 | if (!mdst) |
2989 | goto unlock_continue; | |
adc47037 | 2990 | pg = br_multicast_find_port(mdst, pmctx->port, src); |
0436862e NA |
2991 | if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT)) |
2992 | goto unlock_continue; | |
54bea721 | 2993 | h_addr = &ipv6_hdr(skb)->saddr; |
0436862e NA |
2994 | switch (grec->grec_type) { |
2995 | case MLD2_ALLOW_NEW_SOURCES: | |
adc47037 | 2996 | changed = br_multicast_isinc_allow(brmctx, pg, h_addr, |
54bea721 | 2997 | grec->grec_src, nsrcs, |
474ddb37 NA |
2998 | sizeof(struct in6_addr), |
2999 | grec->grec_type); | |
0436862e | 3000 | break; |
e6231bca | 3001 | case MLD2_MODE_IS_INCLUDE: |
adc47037 | 3002 | changed = br_multicast_isinc_allow(brmctx, pg, h_addr, |
54bea721 | 3003 | grec->grec_src, nsrcs, |
474ddb37 NA |
3004 | sizeof(struct in6_addr), |
3005 | grec->grec_type); | |
e6231bca NA |
3006 | break; |
3007 | case MLD2_MODE_IS_EXCLUDE: | |
adc47037 | 3008 | changed = br_multicast_isexc(brmctx, pg, h_addr, |
54bea721 | 3009 | grec->grec_src, nsrcs, |
ddc255d9 NA |
3010 | sizeof(struct in6_addr), |
3011 | grec->grec_type); | |
e6231bca | 3012 | break; |
5bf1e00b | 3013 | case MLD2_CHANGE_TO_INCLUDE: |
adc47037 | 3014 | changed = br_multicast_toin(brmctx, pmctx, pg, h_addr, |
54bea721 | 3015 | grec->grec_src, nsrcs, |
ddc255d9 NA |
3016 | sizeof(struct in6_addr), |
3017 | grec->grec_type); | |
5bf1e00b NA |
3018 | break; |
3019 | case MLD2_CHANGE_TO_EXCLUDE: | |
adc47037 | 3020 | changed = br_multicast_toex(brmctx, pmctx, pg, h_addr, |
54bea721 | 3021 | grec->grec_src, nsrcs, |
ddc255d9 NA |
3022 | sizeof(struct in6_addr), |
3023 | grec->grec_type); | |
5bf1e00b | 3024 | break; |
109865fe | 3025 | case MLD2_BLOCK_OLD_SOURCES: |
adc47037 | 3026 | changed = br_multicast_block(brmctx, pmctx, pg, h_addr, |
54bea721 | 3027 | grec->grec_src, nsrcs, |
474ddb37 NA |
3028 | sizeof(struct in6_addr), |
3029 | grec->grec_type); | |
109865fe | 3030 | break; |
0436862e NA |
3031 | } |
3032 | if (changed) | |
adc47037 | 3033 | br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB); |
0436862e | 3034 | unlock_continue: |
262985fa | 3035 | spin_unlock(&brmctx->br->multicast_lock); |
08b202b6 YH |
3036 | } |
3037 | ||
3038 | return err; | |
3039 | } | |
3040 | #endif | |
3041 | ||
c3fb3698 NA |
3042 | static bool br_multicast_select_querier(struct net_bridge_mcast *brmctx, |
3043 | struct net_bridge_mcast_port *pmctx, | |
3044 | struct br_ip *saddr) | |
dc4eb53a | 3045 | { |
67b746f9 | 3046 | int port_ifidx = pmctx ? pmctx->port->dev->ifindex : 0; |
c3fb3698 NA |
3047 | struct timer_list *own_timer, *other_timer; |
3048 | struct bridge_mcast_querier *querier; | |
54cb4319 | 3049 | |
c3fb3698 NA |
3050 | switch (saddr->proto) { |
3051 | case htons(ETH_P_IP): | |
3052 | querier = &brmctx->ip4_querier; | |
3053 | own_timer = &brmctx->ip4_own_query.timer; | |
3054 | other_timer = &brmctx->ip4_other_query.timer; | |
3055 | if (!querier->addr.src.ip4 || | |
3056 | ntohl(saddr->src.ip4) <= ntohl(querier->addr.src.ip4)) | |
3057 | goto update; | |
3058 | break; | |
dc4eb53a | 3059 | #if IS_ENABLED(CONFIG_IPV6) |
c3fb3698 NA |
3060 | case htons(ETH_P_IPV6): |
3061 | querier = &brmctx->ip6_querier; | |
3062 | own_timer = &brmctx->ip6_own_query.timer; | |
3063 | other_timer = &brmctx->ip6_other_query.timer; | |
3064 | if (ipv6_addr_cmp(&saddr->src.ip6, &querier->addr.src.ip6) <= 0) | |
3065 | goto update; | |
3066 | break; | |
3067 | #endif | |
3068 | default: | |
3069 | return false; | |
3070 | } | |
dc4eb53a | 3071 | |
c3fb3698 | 3072 | if (!timer_pending(own_timer) && !timer_pending(other_timer)) |
dc4eb53a LL |
3073 | goto update; |
3074 | ||
3075 | return false; | |
3076 | ||
3077 | update: | |
c3fb3698 | 3078 | br_multicast_update_querier(brmctx, querier, port_ifidx, saddr); |
2cd41431 | 3079 | |
dc4eb53a LL |
3080 | return true; |
3081 | } | |
dc4eb53a | 3082 | |
c7fa1d9b NA |
3083 | static struct net_bridge_port * |
3084 | __br_multicast_get_querier_port(struct net_bridge *br, | |
3085 | const struct bridge_mcast_querier *querier) | |
3086 | { | |
3087 | int port_ifidx = READ_ONCE(querier->port_ifidx); | |
3088 | struct net_bridge_port *p; | |
3089 | struct net_device *dev; | |
3090 | ||
3091 | if (port_ifidx == 0) | |
3092 | return NULL; | |
3093 | ||
3094 | dev = dev_get_by_index_rcu(dev_net(br->dev), port_ifidx); | |
3095 | if (!dev) | |
3096 | return NULL; | |
3097 | p = br_port_get_rtnl_rcu(dev); | |
3098 | if (!p || p->br != br) | |
3099 | return NULL; | |
3100 | ||
3101 | return p; | |
3102 | } | |
3103 | ||
3104 | size_t br_multicast_querier_state_size(void) | |
3105 | { | |
cdda378b | 3106 | return nla_total_size(0) + /* nest attribute */ |
c7fa1d9b NA |
3107 | nla_total_size(sizeof(__be32)) + /* BRIDGE_QUERIER_IP_ADDRESS */ |
3108 | nla_total_size(sizeof(int)) + /* BRIDGE_QUERIER_IP_PORT */ | |
175e6692 NA |
3109 | nla_total_size_64bit(sizeof(u64)) + /* BRIDGE_QUERIER_IP_OTHER_TIMER */ |
3110 | #if IS_ENABLED(CONFIG_IPV6) | |
3111 | nla_total_size(sizeof(struct in6_addr)) + /* BRIDGE_QUERIER_IPV6_ADDRESS */ | |
3112 | nla_total_size(sizeof(int)) + /* BRIDGE_QUERIER_IPV6_PORT */ | |
3113 | nla_total_size_64bit(sizeof(u64)) + /* BRIDGE_QUERIER_IPV6_OTHER_TIMER */ | |
3114 | #endif | |
3115 | 0; | |
c7fa1d9b NA |
3116 | } |
3117 | ||
3118 | /* protected by rtnl or rcu */ | |
3119 | int br_multicast_dump_querier_state(struct sk_buff *skb, | |
3120 | const struct net_bridge_mcast *brmctx, | |
3121 | int nest_attr) | |
3122 | { | |
3123 | struct bridge_mcast_querier querier = {}; | |
3124 | struct net_bridge_port *p; | |
3125 | struct nlattr *nest; | |
3126 | ||
f137b7d4 NA |
3127 | if (!br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) || |
3128 | br_multicast_ctx_vlan_global_disabled(brmctx)) | |
3129 | return 0; | |
3130 | ||
c7fa1d9b NA |
3131 | nest = nla_nest_start(skb, nest_attr); |
3132 | if (!nest) | |
3133 | return -EMSGSIZE; | |
3134 | ||
3135 | rcu_read_lock(); | |
85b41082 NA |
3136 | if (!brmctx->multicast_querier && |
3137 | !timer_pending(&brmctx->ip4_other_query.timer)) | |
3138 | goto out_v6; | |
3139 | ||
c7fa1d9b NA |
3140 | br_multicast_read_querier(&brmctx->ip4_querier, &querier); |
3141 | if (nla_put_in_addr(skb, BRIDGE_QUERIER_IP_ADDRESS, | |
3142 | querier.addr.src.ip4)) { | |
3143 | rcu_read_unlock(); | |
3144 | goto out_err; | |
3145 | } | |
3146 | ||
3147 | p = __br_multicast_get_querier_port(brmctx->br, &querier); | |
3148 | if (timer_pending(&brmctx->ip4_other_query.timer) && | |
3149 | (nla_put_u64_64bit(skb, BRIDGE_QUERIER_IP_OTHER_TIMER, | |
3150 | br_timer_value(&brmctx->ip4_other_query.timer), | |
3151 | BRIDGE_QUERIER_PAD) || | |
3152 | (p && nla_put_u32(skb, BRIDGE_QUERIER_IP_PORT, p->dev->ifindex)))) { | |
3153 | rcu_read_unlock(); | |
3154 | goto out_err; | |
3155 | } | |
85b41082 NA |
3156 | |
3157 | out_v6: | |
3158 | #if IS_ENABLED(CONFIG_IPV6) | |
3159 | if (!brmctx->multicast_querier && | |
3160 | !timer_pending(&brmctx->ip6_other_query.timer)) | |
3161 | goto out; | |
3162 | ||
3163 | br_multicast_read_querier(&brmctx->ip6_querier, &querier); | |
3164 | if (nla_put_in6_addr(skb, BRIDGE_QUERIER_IPV6_ADDRESS, | |
3165 | &querier.addr.src.ip6)) { | |
3166 | rcu_read_unlock(); | |
3167 | goto out_err; | |
3168 | } | |
3169 | ||
3170 | p = __br_multicast_get_querier_port(brmctx->br, &querier); | |
3171 | if (timer_pending(&brmctx->ip6_other_query.timer) && | |
3172 | (nla_put_u64_64bit(skb, BRIDGE_QUERIER_IPV6_OTHER_TIMER, | |
3173 | br_timer_value(&brmctx->ip6_other_query.timer), | |
3174 | BRIDGE_QUERIER_PAD) || | |
3175 | (p && nla_put_u32(skb, BRIDGE_QUERIER_IPV6_PORT, | |
3176 | p->dev->ifindex)))) { | |
3177 | rcu_read_unlock(); | |
3178 | goto out_err; | |
3179 | } | |
3180 | out: | |
3181 | #endif | |
c7fa1d9b NA |
3182 | rcu_read_unlock(); |
3183 | nla_nest_end(skb, nest); | |
85b41082 NA |
3184 | if (!nla_len(nest)) |
3185 | nla_nest_cancel(skb, nest); | |
c7fa1d9b NA |
3186 | |
3187 | return 0; | |
3188 | ||
3189 | out_err: | |
3190 | nla_nest_cancel(skb, nest); | |
3191 | return -EMSGSIZE; | |
3192 | } | |
3193 | ||
cc0fdd80 | 3194 | static void |
adc47037 | 3195 | br_multicast_update_query_timer(struct net_bridge_mcast *brmctx, |
90010b36 LL |
3196 | struct bridge_mcast_other_query *query, |
3197 | unsigned long max_delay) | |
b00589af | 3198 | { |
90010b36 LL |
3199 | if (!timer_pending(&query->timer)) |
3200 | query->delay_time = jiffies + max_delay; | |
b00589af | 3201 | |
adc47037 | 3202 | mod_timer(&query->timer, jiffies + brmctx->multicast_querier_interval); |
b00589af LL |
3203 | } |
3204 | ||
6d549648 NF |
3205 | static void br_port_mc_router_state_change(struct net_bridge_port *p, |
3206 | bool is_mc_router) | |
3207 | { | |
3208 | struct switchdev_attr attr = { | |
3209 | .orig_dev = p->dev, | |
3210 | .id = SWITCHDEV_ATTR_ID_PORT_MROUTER, | |
3211 | .flags = SWITCHDEV_F_DEFER, | |
3212 | .u.mrouter = is_mc_router, | |
3213 | }; | |
3214 | ||
dcbdf135 | 3215 | switchdev_port_attr_set(p->dev, &attr, NULL); |
6d549648 NF |
3216 | } |
3217 | ||
d9b8c4d8 | 3218 | static struct net_bridge_port * |
d3d065c0 | 3219 | br_multicast_rport_from_node(struct net_bridge_mcast *brmctx, |
d9b8c4d8 LL |
3220 | struct hlist_head *mc_router_list, |
3221 | struct hlist_node *rlist) | |
3222 | { | |
9632233e NA |
3223 | struct net_bridge_mcast_port *pmctx; |
3224 | ||
a3c02e76 | 3225 | #if IS_ENABLED(CONFIG_IPV6) |
d3d065c0 | 3226 | if (mc_router_list == &brmctx->ip6_mc_router_list) |
9632233e NA |
3227 | pmctx = hlist_entry(rlist, struct net_bridge_mcast_port, |
3228 | ip6_rlist); | |
3229 | else | |
a3c02e76 | 3230 | #endif |
9632233e NA |
3231 | pmctx = hlist_entry(rlist, struct net_bridge_mcast_port, |
3232 | ip4_rlist); | |
3233 | ||
3234 | return pmctx->port; | |
d9b8c4d8 LL |
3235 | } |
3236 | ||
3237 | static struct hlist_node * | |
d3d065c0 | 3238 | br_multicast_get_rport_slot(struct net_bridge_mcast *brmctx, |
d9b8c4d8 LL |
3239 | struct net_bridge_port *port, |
3240 | struct hlist_head *mc_router_list) | |
3241 | ||
3242 | { | |
3243 | struct hlist_node *slot = NULL; | |
3244 | struct net_bridge_port *p; | |
3245 | struct hlist_node *rlist; | |
3246 | ||
3247 | hlist_for_each(rlist, mc_router_list) { | |
d3d065c0 | 3248 | p = br_multicast_rport_from_node(brmctx, mc_router_list, rlist); |
d9b8c4d8 LL |
3249 | |
3250 | if ((unsigned long)port >= (unsigned long)p) | |
3251 | break; | |
3252 | ||
3253 | slot = rlist; | |
3254 | } | |
3255 | ||
3256 | return slot; | |
3257 | } | |
3258 | ||
adc47037 | 3259 | static bool br_multicast_no_router_otherpf(struct net_bridge_mcast_port *pmctx, |
a3c02e76 LL |
3260 | struct hlist_node *rnode) |
3261 | { | |
3262 | #if IS_ENABLED(CONFIG_IPV6) | |
adc47037 NA |
3263 | if (rnode != &pmctx->ip6_rlist) |
3264 | return hlist_unhashed(&pmctx->ip6_rlist); | |
a3c02e76 | 3265 | else |
adc47037 | 3266 | return hlist_unhashed(&pmctx->ip4_rlist); |
a3c02e76 LL |
3267 | #else |
3268 | return true; | |
3269 | #endif | |
3270 | } | |
3271 | ||
d9b8c4d8 | 3272 | /* Add port to router_list |
7e80c124 | 3273 | * list is maintained ordered by pointer value |
3274 | * and locked by br->multicast_lock and RCU | |
3275 | */ | |
d3d065c0 | 3276 | static void br_multicast_add_router(struct net_bridge_mcast *brmctx, |
adc47037 | 3277 | struct net_bridge_mcast_port *pmctx, |
d9b8c4d8 LL |
3278 | struct hlist_node *rlist, |
3279 | struct hlist_head *mc_router_list) | |
0909e117 | 3280 | { |
d9b8c4d8 | 3281 | struct hlist_node *slot; |
dcdca2c4 | 3282 | |
d9b8c4d8 | 3283 | if (!hlist_unhashed(rlist)) |
1a040eac NA |
3284 | return; |
3285 | ||
adc47037 | 3286 | slot = br_multicast_get_rport_slot(brmctx, pmctx->port, mc_router_list); |
dcdca2c4 | 3287 | |
7e80c124 | 3288 | if (slot) |
d9b8c4d8 | 3289 | hlist_add_behind_rcu(rlist, slot); |
dcdca2c4 | 3290 | else |
d9b8c4d8 LL |
3291 | hlist_add_head_rcu(rlist, mc_router_list); |
3292 | ||
a3c02e76 LL |
3293 | /* For backwards compatibility for now, only notify if we |
3294 | * switched from no IPv4/IPv6 multicast router to a new | |
3295 | * IPv4 or IPv6 multicast router. | |
3296 | */ | |
adc47037 | 3297 | if (br_multicast_no_router_otherpf(pmctx, rlist)) { |
1e9ca456 | 3298 | br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_NEWMDB); |
adc47037 | 3299 | br_port_mc_router_state_change(pmctx->port, true); |
a3c02e76 | 3300 | } |
0909e117 HX |
3301 | } |
3302 | ||
d9b8c4d8 LL |
3303 | /* Add port to router_list |
3304 | * list is maintained ordered by pointer value | |
3305 | * and locked by br->multicast_lock and RCU | |
3306 | */ | |
adc47037 NA |
3307 | static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx, |
3308 | struct net_bridge_mcast_port *pmctx) | |
d9b8c4d8 | 3309 | { |
adc47037 NA |
3310 | br_multicast_add_router(brmctx, pmctx, &pmctx->ip4_rlist, |
3311 | &brmctx->ip4_mc_router_list); | |
d9b8c4d8 LL |
3312 | } |
3313 | ||
a3c02e76 LL |
3314 | /* Add port to router_list |
3315 | * list is maintained ordered by pointer value | |
3316 | * and locked by br->multicast_lock and RCU | |
3317 | */ | |
adc47037 NA |
3318 | static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx, |
3319 | struct net_bridge_mcast_port *pmctx) | |
a3c02e76 LL |
3320 | { |
3321 | #if IS_ENABLED(CONFIG_IPV6) | |
adc47037 NA |
3322 | br_multicast_add_router(brmctx, pmctx, &pmctx->ip6_rlist, |
3323 | &brmctx->ip6_mc_router_list); | |
a3c02e76 LL |
3324 | #endif |
3325 | } | |
3326 | ||
adc47037 NA |
3327 | static void br_multicast_mark_router(struct net_bridge_mcast *brmctx, |
3328 | struct net_bridge_mcast_port *pmctx, | |
d9b8c4d8 LL |
3329 | struct timer_list *timer, |
3330 | struct hlist_node *rlist, | |
3331 | struct hlist_head *mc_router_list) | |
eb1d1641 HX |
3332 | { |
3333 | unsigned long now = jiffies; | |
eb1d1641 | 3334 | |
4cdd0d10 NA |
3335 | if (!br_multicast_ctx_should_use(brmctx, pmctx)) |
3336 | return; | |
3337 | ||
adc47037 | 3338 | if (!pmctx) { |
d3d065c0 NA |
3339 | if (brmctx->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) { |
3340 | if (!br_ip4_multicast_is_router(brmctx) && | |
3341 | !br_ip6_multicast_is_router(brmctx)) | |
adc47037 | 3342 | br_mc_router_state_change(brmctx->br, true); |
d3d065c0 | 3343 | mod_timer(timer, now + brmctx->multicast_querier_interval); |
77041420 | 3344 | } |
eb1d1641 HX |
3345 | return; |
3346 | } | |
3347 | ||
adc47037 NA |
3348 | if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED || |
3349 | pmctx->multicast_router == MDB_RTR_TYPE_PERM) | |
eb1d1641 HX |
3350 | return; |
3351 | ||
adc47037 | 3352 | br_multicast_add_router(brmctx, pmctx, rlist, mc_router_list); |
d3d065c0 | 3353 | mod_timer(timer, now + brmctx->multicast_querier_interval); |
d9b8c4d8 LL |
3354 | } |
3355 | ||
adc47037 NA |
3356 | static void br_ip4_multicast_mark_router(struct net_bridge_mcast *brmctx, |
3357 | struct net_bridge_mcast_port *pmctx) | |
d9b8c4d8 | 3358 | { |
adc47037 | 3359 | struct timer_list *timer = &brmctx->ip4_mc_router_timer; |
d9b8c4d8 LL |
3360 | struct hlist_node *rlist = NULL; |
3361 | ||
adc47037 NA |
3362 | if (pmctx) { |
3363 | timer = &pmctx->ip4_mc_router_timer; | |
3364 | rlist = &pmctx->ip4_rlist; | |
d9b8c4d8 | 3365 | } |
eb1d1641 | 3366 | |
adc47037 NA |
3367 | br_multicast_mark_router(brmctx, pmctx, timer, rlist, |
3368 | &brmctx->ip4_mc_router_list); | |
eb1d1641 HX |
3369 | } |
3370 | ||
adc47037 NA |
3371 | static void br_ip6_multicast_mark_router(struct net_bridge_mcast *brmctx, |
3372 | struct net_bridge_mcast_port *pmctx) | |
a3c02e76 LL |
3373 | { |
3374 | #if IS_ENABLED(CONFIG_IPV6) | |
adc47037 | 3375 | struct timer_list *timer = &brmctx->ip6_mc_router_timer; |
a3c02e76 LL |
3376 | struct hlist_node *rlist = NULL; |
3377 | ||
adc47037 NA |
3378 | if (pmctx) { |
3379 | timer = &pmctx->ip6_mc_router_timer; | |
3380 | rlist = &pmctx->ip6_rlist; | |
a3c02e76 LL |
3381 | } |
3382 | ||
adc47037 NA |
3383 | br_multicast_mark_router(brmctx, pmctx, timer, rlist, |
3384 | &brmctx->ip6_mc_router_list); | |
a3c02e76 LL |
3385 | #endif |
3386 | } | |
3387 | ||
b19232ef | 3388 | static void |
adc47037 NA |
3389 | br_ip4_multicast_query_received(struct net_bridge_mcast *brmctx, |
3390 | struct net_bridge_mcast_port *pmctx, | |
b19232ef LL |
3391 | struct bridge_mcast_other_query *query, |
3392 | struct br_ip *saddr, | |
3393 | unsigned long max_delay) | |
3394 | { | |
c3fb3698 | 3395 | if (!br_multicast_select_querier(brmctx, pmctx, saddr)) |
b19232ef LL |
3396 | return; |
3397 | ||
adc47037 NA |
3398 | br_multicast_update_query_timer(brmctx, query, max_delay); |
3399 | br_ip4_multicast_mark_router(brmctx, pmctx); | |
b19232ef LL |
3400 | } |
3401 | ||
3402 | #if IS_ENABLED(CONFIG_IPV6) | |
3403 | static void | |
adc47037 NA |
3404 | br_ip6_multicast_query_received(struct net_bridge_mcast *brmctx, |
3405 | struct net_bridge_mcast_port *pmctx, | |
b19232ef LL |
3406 | struct bridge_mcast_other_query *query, |
3407 | struct br_ip *saddr, | |
3408 | unsigned long max_delay) | |
eb1d1641 | 3409 | { |
c3fb3698 | 3410 | if (!br_multicast_select_querier(brmctx, pmctx, saddr)) |
eb1d1641 HX |
3411 | return; |
3412 | ||
adc47037 NA |
3413 | br_multicast_update_query_timer(brmctx, query, max_delay); |
3414 | br_ip6_multicast_mark_router(brmctx, pmctx); | |
eb1d1641 | 3415 | } |
b19232ef | 3416 | #endif |
eb1d1641 | 3417 | |
adc47037 NA |
3418 | static void br_ip4_multicast_query(struct net_bridge_mcast *brmctx, |
3419 | struct net_bridge_mcast_port *pmctx, | |
9c2e955c | 3420 | struct sk_buff *skb, |
3421 | u16 vid) | |
eb1d1641 | 3422 | { |
ba5ea614 | 3423 | unsigned int transport_len = ip_transport_len(skb); |
b71d1d42 | 3424 | const struct iphdr *iph = ip_hdr(skb); |
eb1d1641 HX |
3425 | struct igmphdr *ih = igmp_hdr(skb); |
3426 | struct net_bridge_mdb_entry *mp; | |
3427 | struct igmpv3_query *ih3; | |
3428 | struct net_bridge_port_group *p; | |
e8051688 | 3429 | struct net_bridge_port_group __rcu **pp; |
67b746f9 | 3430 | struct br_ip saddr = {}; |
eb1d1641 HX |
3431 | unsigned long max_delay; |
3432 | unsigned long now = jiffies; | |
3433 | __be32 group; | |
3434 | ||
adc47037 | 3435 | spin_lock(&brmctx->br->multicast_lock); |
4cdd0d10 | 3436 | if (!br_multicast_ctx_should_use(brmctx, pmctx)) |
eb1d1641 HX |
3437 | goto out; |
3438 | ||
eb1d1641 HX |
3439 | group = ih->group; |
3440 | ||
ba5ea614 | 3441 | if (transport_len == sizeof(*ih)) { |
eb1d1641 HX |
3442 | max_delay = ih->code * (HZ / IGMP_TIMER_SCALE); |
3443 | ||
3444 | if (!max_delay) { | |
3445 | max_delay = 10 * HZ; | |
3446 | group = 0; | |
3447 | } | |
ba5ea614 | 3448 | } else if (transport_len >= sizeof(*ih3)) { |
eb1d1641 | 3449 | ih3 = igmpv3_query_hdr(skb); |
23550b83 | 3450 | if (ih3->nsrcs || |
d3d065c0 NA |
3451 | (brmctx->multicast_igmp_version == 3 && group && |
3452 | ih3->suppress)) | |
bec68ff1 | 3453 | goto out; |
eb1d1641 | 3454 | |
0ba8c9ec YH |
3455 | max_delay = ih3->code ? |
3456 | IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1; | |
9afd85c9 | 3457 | } else { |
9ed973cc LL |
3458 | goto out; |
3459 | } | |
3460 | ||
dc4eb53a LL |
3461 | if (!group) { |
3462 | saddr.proto = htons(ETH_P_IP); | |
deb96566 | 3463 | saddr.src.ip4 = iph->saddr; |
b00589af | 3464 | |
adc47037 | 3465 | br_ip4_multicast_query_received(brmctx, pmctx, |
d3d065c0 | 3466 | &brmctx->ip4_other_query, |
b19232ef | 3467 | &saddr, max_delay); |
eb1d1641 | 3468 | goto out; |
dc4eb53a | 3469 | } |
eb1d1641 | 3470 | |
adc47037 | 3471 | mp = br_mdb_ip4_get(brmctx->br, group, vid); |
eb1d1641 HX |
3472 | if (!mp) |
3473 | goto out; | |
3474 | ||
d3d065c0 | 3475 | max_delay *= brmctx->multicast_last_member_count; |
eb1d1641 | 3476 | |
ff0fd34e | 3477 | if (mp->host_joined && |
eb1d1641 HX |
3478 | (timer_pending(&mp->timer) ? |
3479 | time_after(mp->timer.expires, now + max_delay) : | |
3480 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
3481 | mod_timer(&mp->timer, now + max_delay); | |
3482 | ||
e8051688 | 3483 | for (pp = &mp->ports; |
adc47037 | 3484 | (p = mlock_dereference(*pp, brmctx->br)) != NULL; |
e8051688 | 3485 | pp = &p->next) { |
eb1d1641 HX |
3486 | if (timer_pending(&p->timer) ? |
3487 | time_after(p->timer.expires, now + max_delay) : | |
23550b83 | 3488 | try_to_del_timer_sync(&p->timer) >= 0 && |
d3d065c0 | 3489 | (brmctx->multicast_igmp_version == 2 || |
23550b83 | 3490 | p->filter_mode == MCAST_EXCLUDE)) |
24f9cdcb | 3491 | mod_timer(&p->timer, now + max_delay); |
eb1d1641 HX |
3492 | } |
3493 | ||
3494 | out: | |
adc47037 | 3495 | spin_unlock(&brmctx->br->multicast_lock); |
eb1d1641 HX |
3496 | } |
3497 | ||
dfd56b8b | 3498 | #if IS_ENABLED(CONFIG_IPV6) |
adc47037 NA |
3499 | static int br_ip6_multicast_query(struct net_bridge_mcast *brmctx, |
3500 | struct net_bridge_mcast_port *pmctx, | |
06499098 VY |
3501 | struct sk_buff *skb, |
3502 | u16 vid) | |
08b202b6 | 3503 | { |
ba5ea614 | 3504 | unsigned int transport_len = ipv6_transport_len(skb); |
eca2a43b | 3505 | struct mld_msg *mld; |
08b202b6 YH |
3506 | struct net_bridge_mdb_entry *mp; |
3507 | struct mld2_query *mld2q; | |
e8051688 ED |
3508 | struct net_bridge_port_group *p; |
3509 | struct net_bridge_port_group __rcu **pp; | |
67b746f9 | 3510 | struct br_ip saddr = {}; |
08b202b6 YH |
3511 | unsigned long max_delay; |
3512 | unsigned long now = jiffies; | |
856ce5d0 | 3513 | unsigned int offset = skb_transport_offset(skb); |
b71d1d42 | 3514 | const struct in6_addr *group = NULL; |
9ed973cc | 3515 | bool is_general_query; |
08b202b6 YH |
3516 | int err = 0; |
3517 | ||
adc47037 | 3518 | spin_lock(&brmctx->br->multicast_lock); |
4cdd0d10 | 3519 | if (!br_multicast_ctx_should_use(brmctx, pmctx)) |
08b202b6 YH |
3520 | goto out; |
3521 | ||
ba5ea614 | 3522 | if (transport_len == sizeof(*mld)) { |
856ce5d0 | 3523 | if (!pskb_may_pull(skb, offset + sizeof(*mld))) { |
08b202b6 YH |
3524 | err = -EINVAL; |
3525 | goto out; | |
3526 | } | |
3527 | mld = (struct mld_msg *) icmp6_hdr(skb); | |
4715213d | 3528 | max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay)); |
08b202b6 YH |
3529 | if (max_delay) |
3530 | group = &mld->mld_mca; | |
248ba8ec | 3531 | } else { |
856ce5d0 | 3532 | if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) { |
08b202b6 YH |
3533 | err = -EINVAL; |
3534 | goto out; | |
3535 | } | |
3536 | mld2q = (struct mld2_query *)icmp6_hdr(skb); | |
3537 | if (!mld2q->mld2q_nsrcs) | |
3538 | group = &mld2q->mld2q_mca; | |
d3d065c0 | 3539 | if (brmctx->multicast_mld_version == 2 && |
23550b83 NA |
3540 | !ipv6_addr_any(&mld2q->mld2q_mca) && |
3541 | mld2q->mld2q_suppress) | |
3542 | goto out; | |
e3f5b170 DB |
3543 | |
3544 | max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL); | |
08b202b6 YH |
3545 | } |
3546 | ||
9ed973cc LL |
3547 | is_general_query = group && ipv6_addr_any(group); |
3548 | ||
dc4eb53a LL |
3549 | if (is_general_query) { |
3550 | saddr.proto = htons(ETH_P_IPV6); | |
deb96566 | 3551 | saddr.src.ip6 = ipv6_hdr(skb)->saddr; |
b00589af | 3552 | |
adc47037 | 3553 | br_ip6_multicast_query_received(brmctx, pmctx, |
d3d065c0 | 3554 | &brmctx->ip6_other_query, |
b19232ef | 3555 | &saddr, max_delay); |
08b202b6 | 3556 | goto out; |
6c03ee8b LL |
3557 | } else if (!group) { |
3558 | goto out; | |
dc4eb53a | 3559 | } |
08b202b6 | 3560 | |
adc47037 | 3561 | mp = br_mdb_ip6_get(brmctx->br, group, vid); |
08b202b6 YH |
3562 | if (!mp) |
3563 | goto out; | |
3564 | ||
d3d065c0 | 3565 | max_delay *= brmctx->multicast_last_member_count; |
ff0fd34e | 3566 | if (mp->host_joined && |
08b202b6 YH |
3567 | (timer_pending(&mp->timer) ? |
3568 | time_after(mp->timer.expires, now + max_delay) : | |
3569 | try_to_del_timer_sync(&mp->timer) >= 0)) | |
3570 | mod_timer(&mp->timer, now + max_delay); | |
3571 | ||
e8051688 | 3572 | for (pp = &mp->ports; |
adc47037 | 3573 | (p = mlock_dereference(*pp, brmctx->br)) != NULL; |
e8051688 | 3574 | pp = &p->next) { |
08b202b6 YH |
3575 | if (timer_pending(&p->timer) ? |
3576 | time_after(p->timer.expires, now + max_delay) : | |
23550b83 | 3577 | try_to_del_timer_sync(&p->timer) >= 0 && |
d3d065c0 | 3578 | (brmctx->multicast_mld_version == 1 || |
23550b83 | 3579 | p->filter_mode == MCAST_EXCLUDE)) |
24f9cdcb | 3580 | mod_timer(&p->timer, now + max_delay); |
08b202b6 YH |
3581 | } |
3582 | ||
3583 | out: | |
adc47037 | 3584 | spin_unlock(&brmctx->br->multicast_lock); |
08b202b6 YH |
3585 | return err; |
3586 | } | |
3587 | #endif | |
3588 | ||
90010b36 | 3589 | static void |
adc47037 NA |
3590 | br_multicast_leave_group(struct net_bridge_mcast *brmctx, |
3591 | struct net_bridge_mcast_port *pmctx, | |
90010b36 LL |
3592 | struct br_ip *group, |
3593 | struct bridge_mcast_other_query *other_query, | |
6db6f0ea FF |
3594 | struct bridge_mcast_own_query *own_query, |
3595 | const unsigned char *src) | |
eb1d1641 | 3596 | { |
eb1d1641 HX |
3597 | struct net_bridge_mdb_entry *mp; |
3598 | struct net_bridge_port_group *p; | |
3599 | unsigned long now; | |
3600 | unsigned long time; | |
3601 | ||
adc47037 | 3602 | spin_lock(&brmctx->br->multicast_lock); |
4cdd0d10 | 3603 | if (!br_multicast_ctx_should_use(brmctx, pmctx)) |
eb1d1641 HX |
3604 | goto out; |
3605 | ||
adc47037 | 3606 | mp = br_mdb_ip_get(brmctx->br, group); |
eb1d1641 HX |
3607 | if (!mp) |
3608 | goto out; | |
3609 | ||
adc47037 | 3610 | if (pmctx && (pmctx->port->flags & BR_MULTICAST_FAST_LEAVE)) { |
544586f7 SA |
3611 | struct net_bridge_port_group __rcu **pp; |
3612 | ||
3613 | for (pp = &mp->ports; | |
adc47037 | 3614 | (p = mlock_dereference(*pp, brmctx->br)) != NULL; |
544586f7 | 3615 | pp = &p->next) { |
adc47037 | 3616 | if (!br_port_group_equal(p, pmctx->port, src)) |
544586f7 SA |
3617 | continue; |
3618 | ||
5c725b6b NA |
3619 | if (p->flags & MDB_PG_FLAGS_PERMANENT) |
3620 | break; | |
3621 | ||
681590bd NA |
3622 | p->flags |= MDB_PG_FLAGS_FAST_LEAVE; |
3623 | br_multicast_del_pg(mp, p, pp); | |
544586f7 SA |
3624 | } |
3625 | goto out; | |
3626 | } | |
3627 | ||
3628 | if (timer_pending(&other_query->timer)) | |
3629 | goto out; | |
3630 | ||
4d5b4e84 | 3631 | if (brmctx->multicast_querier) { |
adc47037 | 3632 | __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &mp->addr, |
42c11ccf | 3633 | false, 0, NULL); |
6b7df111 | 3634 | |
d3d065c0 NA |
3635 | time = jiffies + brmctx->multicast_last_member_count * |
3636 | brmctx->multicast_last_member_interval; | |
cc0fdd80 | 3637 | |
90010b36 | 3638 | mod_timer(&own_query->timer, time); |
6b7df111 | 3639 | |
adc47037 | 3640 | for (p = mlock_dereference(mp->ports, brmctx->br); |
54cb4319 | 3641 | p != NULL && pmctx != NULL; |
adc47037 NA |
3642 | p = mlock_dereference(p->next, brmctx->br)) { |
3643 | if (!br_port_group_equal(p, pmctx->port, src)) | |
6b7df111 CW |
3644 | continue; |
3645 | ||
3646 | if (!hlist_unhashed(&p->mglist) && | |
3647 | (timer_pending(&p->timer) ? | |
3648 | time_after(p->timer.expires, time) : | |
3649 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
3650 | mod_timer(&p->timer, time); | |
3651 | } | |
3652 | ||
3653 | break; | |
3654 | } | |
3655 | } | |
3656 | ||
eb1d1641 | 3657 | now = jiffies; |
d3d065c0 NA |
3658 | time = now + brmctx->multicast_last_member_count * |
3659 | brmctx->multicast_last_member_interval; | |
eb1d1641 | 3660 | |
adc47037 | 3661 | if (!pmctx) { |
ff0fd34e | 3662 | if (mp->host_joined && |
eb1d1641 HX |
3663 | (timer_pending(&mp->timer) ? |
3664 | time_after(mp->timer.expires, time) : | |
3665 | try_to_del_timer_sync(&mp->timer) >= 0)) { | |
3666 | mod_timer(&mp->timer, time); | |
eb1d1641 | 3667 | } |
454594f3 LL |
3668 | |
3669 | goto out; | |
3670 | } | |
3671 | ||
adc47037 | 3672 | for (p = mlock_dereference(mp->ports, brmctx->br); |
454594f3 | 3673 | p != NULL; |
adc47037 NA |
3674 | p = mlock_dereference(p->next, brmctx->br)) { |
3675 | if (p->key.port != pmctx->port) | |
454594f3 LL |
3676 | continue; |
3677 | ||
3678 | if (!hlist_unhashed(&p->mglist) && | |
3679 | (timer_pending(&p->timer) ? | |
3680 | time_after(p->timer.expires, time) : | |
3681 | try_to_del_timer_sync(&p->timer) >= 0)) { | |
3682 | mod_timer(&p->timer, time); | |
3683 | } | |
3684 | ||
3685 | break; | |
eb1d1641 | 3686 | } |
eb1d1641 | 3687 | out: |
adc47037 | 3688 | spin_unlock(&brmctx->br->multicast_lock); |
eb1d1641 HX |
3689 | } |
3690 | ||
adc47037 NA |
3691 | static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx, |
3692 | struct net_bridge_mcast_port *pmctx, | |
b0e9a30d | 3693 | __be32 group, |
6db6f0ea FF |
3694 | __u16 vid, |
3695 | const unsigned char *src) | |
8ef2a9a5 YH |
3696 | { |
3697 | struct br_ip br_group; | |
90010b36 | 3698 | struct bridge_mcast_own_query *own_query; |
8ef2a9a5 YH |
3699 | |
3700 | if (ipv4_is_local_multicast(group)) | |
3701 | return; | |
3702 | ||
adc47037 | 3703 | own_query = pmctx ? &pmctx->ip4_own_query : &brmctx->ip4_own_query; |
90010b36 | 3704 | |
1515a63f | 3705 | memset(&br_group, 0, sizeof(br_group)); |
eab3227b | 3706 | br_group.dst.ip4 = group; |
8ef2a9a5 | 3707 | br_group.proto = htons(ETH_P_IP); |
b0e9a30d | 3708 | br_group.vid = vid; |
8ef2a9a5 | 3709 | |
adc47037 NA |
3710 | br_multicast_leave_group(brmctx, pmctx, &br_group, |
3711 | &brmctx->ip4_other_query, | |
6db6f0ea | 3712 | own_query, src); |
8ef2a9a5 YH |
3713 | } |
3714 | ||
dfd56b8b | 3715 | #if IS_ENABLED(CONFIG_IPV6) |
adc47037 NA |
3716 | static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx, |
3717 | struct net_bridge_mcast_port *pmctx, | |
b0e9a30d | 3718 | const struct in6_addr *group, |
6db6f0ea FF |
3719 | __u16 vid, |
3720 | const unsigned char *src) | |
08b202b6 YH |
3721 | { |
3722 | struct br_ip br_group; | |
90010b36 | 3723 | struct bridge_mcast_own_query *own_query; |
08b202b6 | 3724 | |
3c3769e6 | 3725 | if (ipv6_addr_is_ll_all_nodes(group)) |
08b202b6 YH |
3726 | return; |
3727 | ||
adc47037 | 3728 | own_query = pmctx ? &pmctx->ip6_own_query : &brmctx->ip6_own_query; |
90010b36 | 3729 | |
1515a63f | 3730 | memset(&br_group, 0, sizeof(br_group)); |
eab3227b | 3731 | br_group.dst.ip6 = *group; |
08b202b6 | 3732 | br_group.proto = htons(ETH_P_IPV6); |
b0e9a30d | 3733 | br_group.vid = vid; |
08b202b6 | 3734 | |
adc47037 NA |
3735 | br_multicast_leave_group(brmctx, pmctx, &br_group, |
3736 | &brmctx->ip6_other_query, | |
6db6f0ea | 3737 | own_query, src); |
08b202b6 YH |
3738 | } |
3739 | #endif | |
8ef2a9a5 | 3740 | |
1080ab95 NA |
3741 | static void br_multicast_err_count(const struct net_bridge *br, |
3742 | const struct net_bridge_port *p, | |
3743 | __be16 proto) | |
3744 | { | |
3745 | struct bridge_mcast_stats __percpu *stats; | |
3746 | struct bridge_mcast_stats *pstats; | |
3747 | ||
675779ad | 3748 | if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) |
1080ab95 NA |
3749 | return; |
3750 | ||
3751 | if (p) | |
3752 | stats = p->mcast_stats; | |
3753 | else | |
3754 | stats = br->mcast_stats; | |
3755 | if (WARN_ON(!stats)) | |
3756 | return; | |
3757 | ||
3758 | pstats = this_cpu_ptr(stats); | |
3759 | ||
3760 | u64_stats_update_begin(&pstats->syncp); | |
3761 | switch (proto) { | |
3762 | case htons(ETH_P_IP): | |
3763 | pstats->mstats.igmp_parse_errors++; | |
3764 | break; | |
3765 | #if IS_ENABLED(CONFIG_IPV6) | |
3766 | case htons(ETH_P_IPV6): | |
3767 | pstats->mstats.mld_parse_errors++; | |
3768 | break; | |
3769 | #endif | |
3770 | } | |
3771 | u64_stats_update_end(&pstats->syncp); | |
3772 | } | |
3773 | ||
adc47037 NA |
3774 | static void br_multicast_pim(struct net_bridge_mcast *brmctx, |
3775 | struct net_bridge_mcast_port *pmctx, | |
91b02d3d NA |
3776 | const struct sk_buff *skb) |
3777 | { | |
3778 | unsigned int offset = skb_transport_offset(skb); | |
3779 | struct pimhdr *pimhdr, _pimhdr; | |
3780 | ||
3781 | pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr); | |
3782 | if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION || | |
3783 | pim_hdr_type(pimhdr) != PIM_TYPE_HELLO) | |
3784 | return; | |
3785 | ||
adc47037 NA |
3786 | spin_lock(&brmctx->br->multicast_lock); |
3787 | br_ip4_multicast_mark_router(brmctx, pmctx); | |
3788 | spin_unlock(&brmctx->br->multicast_lock); | |
91b02d3d NA |
3789 | } |
3790 | ||
adc47037 NA |
3791 | static int br_ip4_multicast_mrd_rcv(struct net_bridge_mcast *brmctx, |
3792 | struct net_bridge_mcast_port *pmctx, | |
4b3087c7 LL |
3793 | struct sk_buff *skb) |
3794 | { | |
3795 | if (ip_hdr(skb)->protocol != IPPROTO_IGMP || | |
3796 | igmp_hdr(skb)->type != IGMP_MRDISC_ADV) | |
3797 | return -ENOMSG; | |
3798 | ||
adc47037 NA |
3799 | spin_lock(&brmctx->br->multicast_lock); |
3800 | br_ip4_multicast_mark_router(brmctx, pmctx); | |
3801 | spin_unlock(&brmctx->br->multicast_lock); | |
4b3087c7 LL |
3802 | |
3803 | return 0; | |
3804 | } | |
3805 | ||
adc47037 NA |
3806 | static int br_multicast_ipv4_rcv(struct net_bridge_mcast *brmctx, |
3807 | struct net_bridge_mcast_port *pmctx, | |
06499098 VY |
3808 | struct sk_buff *skb, |
3809 | u16 vid) | |
eb1d1641 | 3810 | { |
adc47037 | 3811 | struct net_bridge_port *p = pmctx ? pmctx->port : NULL; |
6db6f0ea | 3812 | const unsigned char *src; |
eb1d1641 | 3813 | struct igmphdr *ih; |
eb1d1641 HX |
3814 | int err; |
3815 | ||
ba5ea614 | 3816 | err = ip_mc_check_igmp(skb); |
eb1d1641 | 3817 | |
9afd85c9 | 3818 | if (err == -ENOMSG) { |
91b02d3d | 3819 | if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) { |
bd4265fe | 3820 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
91b02d3d NA |
3821 | } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) { |
3822 | if (ip_hdr(skb)->protocol == IPPROTO_PIM) | |
adc47037 | 3823 | br_multicast_pim(brmctx, pmctx, skb); |
4b3087c7 | 3824 | } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) { |
adc47037 | 3825 | br_ip4_multicast_mrd_rcv(brmctx, pmctx, skb); |
91b02d3d | 3826 | } |
4b3087c7 | 3827 | |
eb1d1641 | 3828 | return 0; |
9afd85c9 | 3829 | } else if (err < 0) { |
adc47037 | 3830 | br_multicast_err_count(brmctx->br, p, skb->protocol); |
9afd85c9 | 3831 | return err; |
bd4265fe | 3832 | } |
eb1d1641 | 3833 | |
9afd85c9 | 3834 | ih = igmp_hdr(skb); |
6db6f0ea | 3835 | src = eth_hdr(skb)->h_source; |
1080ab95 | 3836 | BR_INPUT_SKB_CB(skb)->igmp = ih->type; |
eb1d1641 HX |
3837 | |
3838 | switch (ih->type) { | |
3839 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
3840 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
62b2bcb4 | 3841 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
adc47037 NA |
3842 | err = br_ip4_multicast_add_group(brmctx, pmctx, ih->group, vid, |
3843 | src, true); | |
eb1d1641 HX |
3844 | break; |
3845 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
adc47037 | 3846 | err = br_ip4_multicast_igmp3_report(brmctx, pmctx, skb, vid); |
eb1d1641 HX |
3847 | break; |
3848 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
adc47037 | 3849 | br_ip4_multicast_query(brmctx, pmctx, skb, vid); |
eb1d1641 HX |
3850 | break; |
3851 | case IGMP_HOST_LEAVE_MESSAGE: | |
adc47037 | 3852 | br_ip4_multicast_leave_group(brmctx, pmctx, ih->group, vid, src); |
eb1d1641 HX |
3853 | break; |
3854 | } | |
3855 | ||
adc47037 | 3856 | br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
3857 | BR_MCAST_DIR_RX); |
3858 | ||
eb1d1641 HX |
3859 | return err; |
3860 | } | |
3861 | ||
dfd56b8b | 3862 | #if IS_ENABLED(CONFIG_IPV6) |
adc47037 NA |
3863 | static void br_ip6_multicast_mrd_rcv(struct net_bridge_mcast *brmctx, |
3864 | struct net_bridge_mcast_port *pmctx, | |
99014088 | 3865 | struct sk_buff *skb) |
4b3087c7 | 3866 | { |
4b3087c7 | 3867 | if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV) |
99014088 | 3868 | return; |
4b3087c7 | 3869 | |
adc47037 NA |
3870 | spin_lock(&brmctx->br->multicast_lock); |
3871 | br_ip6_multicast_mark_router(brmctx, pmctx); | |
3872 | spin_unlock(&brmctx->br->multicast_lock); | |
4b3087c7 LL |
3873 | } |
3874 | ||
adc47037 NA |
3875 | static int br_multicast_ipv6_rcv(struct net_bridge_mcast *brmctx, |
3876 | struct net_bridge_mcast_port *pmctx, | |
06499098 VY |
3877 | struct sk_buff *skb, |
3878 | u16 vid) | |
08b202b6 | 3879 | { |
adc47037 | 3880 | struct net_bridge_port *p = pmctx ? pmctx->port : NULL; |
6db6f0ea | 3881 | const unsigned char *src; |
9afd85c9 | 3882 | struct mld_msg *mld; |
08b202b6 YH |
3883 | int err; |
3884 | ||
ba5ea614 | 3885 | err = ipv6_mc_check_mld(skb); |
08b202b6 | 3886 | |
99014088 | 3887 | if (err == -ENOMSG || err == -ENODATA) { |
9afd85c9 LL |
3888 | if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr)) |
3889 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; | |
99014088 LL |
3890 | if (err == -ENODATA && |
3891 | ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr)) | |
adc47037 | 3892 | br_ip6_multicast_mrd_rcv(brmctx, pmctx, skb); |
4b3087c7 | 3893 | |
08b202b6 | 3894 | return 0; |
9afd85c9 | 3895 | } else if (err < 0) { |
adc47037 | 3896 | br_multicast_err_count(brmctx->br, p, skb->protocol); |
9afd85c9 | 3897 | return err; |
08b202b6 YH |
3898 | } |
3899 | ||
9afd85c9 | 3900 | mld = (struct mld_msg *)skb_transport_header(skb); |
1080ab95 | 3901 | BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type; |
08b202b6 | 3902 | |
9afd85c9 | 3903 | switch (mld->mld_type) { |
08b202b6 | 3904 | case ICMPV6_MGM_REPORT: |
6db6f0ea | 3905 | src = eth_hdr(skb)->h_source; |
fc2af6c7 | 3906 | BR_INPUT_SKB_CB(skb)->mrouters_only = 1; |
adc47037 NA |
3907 | err = br_ip6_multicast_add_group(brmctx, pmctx, &mld->mld_mca, |
3908 | vid, src, true); | |
08b202b6 | 3909 | break; |
08b202b6 | 3910 | case ICMPV6_MLD2_REPORT: |
adc47037 | 3911 | err = br_ip6_multicast_mld2_report(brmctx, pmctx, skb, vid); |
08b202b6 YH |
3912 | break; |
3913 | case ICMPV6_MGM_QUERY: | |
adc47037 | 3914 | err = br_ip6_multicast_query(brmctx, pmctx, skb, vid); |
08b202b6 YH |
3915 | break; |
3916 | case ICMPV6_MGM_REDUCTION: | |
6db6f0ea | 3917 | src = eth_hdr(skb)->h_source; |
adc47037 NA |
3918 | br_ip6_multicast_leave_group(brmctx, pmctx, &mld->mld_mca, vid, |
3919 | src); | |
9afd85c9 | 3920 | break; |
08b202b6 YH |
3921 | } |
3922 | ||
adc47037 | 3923 | br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp, |
1080ab95 NA |
3924 | BR_MCAST_DIR_RX); |
3925 | ||
08b202b6 YH |
3926 | return err; |
3927 | } | |
3928 | #endif | |
3929 | ||
f4b7002a NA |
3930 | int br_multicast_rcv(struct net_bridge_mcast **brmctx, |
3931 | struct net_bridge_mcast_port **pmctx, | |
3932 | struct net_bridge_vlan *vlan, | |
06499098 | 3933 | struct sk_buff *skb, u16 vid) |
eb1d1641 | 3934 | { |
1080ab95 NA |
3935 | int ret = 0; |
3936 | ||
1fafc7a9 YH |
3937 | BR_INPUT_SKB_CB(skb)->igmp = 0; |
3938 | BR_INPUT_SKB_CB(skb)->mrouters_only = 0; | |
3939 | ||
f4b7002a | 3940 | if (!br_opt_get((*brmctx)->br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
3941 | return 0; |
3942 | ||
f4b7002a NA |
3943 | if (br_opt_get((*brmctx)->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && vlan) { |
3944 | const struct net_bridge_vlan *masterv; | |
3945 | ||
3946 | /* the vlan has the master flag set only when transmitting | |
3947 | * through the bridge device | |
3948 | */ | |
3949 | if (br_vlan_is_master(vlan)) { | |
3950 | masterv = vlan; | |
3951 | *brmctx = &vlan->br_mcast_ctx; | |
3952 | *pmctx = NULL; | |
3953 | } else { | |
3954 | masterv = vlan->brvlan; | |
3955 | *brmctx = &vlan->brvlan->br_mcast_ctx; | |
3956 | *pmctx = &vlan->port_mcast_ctx; | |
3957 | } | |
3958 | ||
3959 | if (!(masterv->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)) | |
3960 | return 0; | |
3961 | } | |
3962 | ||
eb1d1641 HX |
3963 | switch (skb->protocol) { |
3964 | case htons(ETH_P_IP): | |
f4b7002a | 3965 | ret = br_multicast_ipv4_rcv(*brmctx, *pmctx, skb, vid); |
1080ab95 | 3966 | break; |
dfd56b8b | 3967 | #if IS_ENABLED(CONFIG_IPV6) |
08b202b6 | 3968 | case htons(ETH_P_IPV6): |
f4b7002a | 3969 | ret = br_multicast_ipv6_rcv(*brmctx, *pmctx, skb, vid); |
1080ab95 | 3970 | break; |
08b202b6 | 3971 | #endif |
eb1d1641 HX |
3972 | } |
3973 | ||
1080ab95 | 3974 | return ret; |
eb1d1641 HX |
3975 | } |
3976 | ||
adc47037 | 3977 | static void br_multicast_query_expired(struct net_bridge_mcast *brmctx, |
2cd41431 LL |
3978 | struct bridge_mcast_own_query *query, |
3979 | struct bridge_mcast_querier *querier) | |
cc0fdd80 | 3980 | { |
adc47037 | 3981 | spin_lock(&brmctx->br->multicast_lock); |
4cdd0d10 NA |
3982 | if (br_multicast_ctx_vlan_disabled(brmctx)) |
3983 | goto out; | |
3984 | ||
adc47037 | 3985 | if (query->startup_sent < brmctx->multicast_startup_query_count) |
cc0fdd80 LL |
3986 | query->startup_sent++; |
3987 | ||
adc47037 | 3988 | br_multicast_send_query(brmctx, NULL, query); |
4cdd0d10 | 3989 | out: |
adc47037 | 3990 | spin_unlock(&brmctx->br->multicast_lock); |
cc0fdd80 LL |
3991 | } |
3992 | ||
88c1f37f | 3993 | static void br_ip4_multicast_query_expired(struct timer_list *t) |
eb1d1641 | 3994 | { |
d3d065c0 NA |
3995 | struct net_bridge_mcast *brmctx = from_timer(brmctx, t, |
3996 | ip4_own_query.timer); | |
eb1d1641 | 3997 | |
adc47037 | 3998 | br_multicast_query_expired(brmctx, &brmctx->ip4_own_query, |
d3d065c0 | 3999 | &brmctx->ip4_querier); |
cc0fdd80 | 4000 | } |
eb1d1641 | 4001 | |
cc0fdd80 | 4002 | #if IS_ENABLED(CONFIG_IPV6) |
88c1f37f | 4003 | static void br_ip6_multicast_query_expired(struct timer_list *t) |
cc0fdd80 | 4004 | { |
d3d065c0 NA |
4005 | struct net_bridge_mcast *brmctx = from_timer(brmctx, t, |
4006 | ip6_own_query.timer); | |
eb1d1641 | 4007 | |
adc47037 | 4008 | br_multicast_query_expired(brmctx, &brmctx->ip6_own_query, |
d3d065c0 | 4009 | &brmctx->ip6_querier); |
eb1d1641 | 4010 | } |
cc0fdd80 | 4011 | #endif |
eb1d1641 | 4012 | |
e12cec65 | 4013 | static void br_multicast_gc_work(struct work_struct *work) |
8b671779 NA |
4014 | { |
4015 | struct net_bridge *br = container_of(work, struct net_bridge, | |
e12cec65 | 4016 | mcast_gc_work); |
8b671779 NA |
4017 | HLIST_HEAD(deleted_head); |
4018 | ||
4019 | spin_lock_bh(&br->multicast_lock); | |
e12cec65 | 4020 | hlist_move_list(&br->mcast_gc_list, &deleted_head); |
8b671779 NA |
4021 | spin_unlock_bh(&br->multicast_lock); |
4022 | ||
e12cec65 | 4023 | br_multicast_gc(&deleted_head); |
8b671779 NA |
4024 | } |
4025 | ||
613d61db NA |
4026 | void br_multicast_ctx_init(struct net_bridge *br, |
4027 | struct net_bridge_vlan *vlan, | |
4028 | struct net_bridge_mcast *brmctx) | |
eb1d1641 | 4029 | { |
613d61db NA |
4030 | brmctx->br = br; |
4031 | brmctx->vlan = vlan; | |
4032 | brmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
4033 | brmctx->multicast_last_member_count = 2; | |
4034 | brmctx->multicast_startup_query_count = 2; | |
eb1d1641 | 4035 | |
613d61db NA |
4036 | brmctx->multicast_last_member_interval = HZ; |
4037 | brmctx->multicast_query_response_interval = 10 * HZ; | |
4038 | brmctx->multicast_startup_query_interval = 125 * HZ / 4; | |
4039 | brmctx->multicast_query_interval = 125 * HZ; | |
4040 | brmctx->multicast_querier_interval = 255 * HZ; | |
4041 | brmctx->multicast_membership_interval = 260 * HZ; | |
4042 | ||
4043 | brmctx->ip4_other_query.delay_time = 0; | |
bb18ef8e | 4044 | brmctx->ip4_querier.port_ifidx = 0; |
f936bb42 | 4045 | seqcount_spinlock_init(&brmctx->ip4_querier.seq, &br->multicast_lock); |
613d61db | 4046 | brmctx->multicast_igmp_version = 2; |
cc0fdd80 | 4047 | #if IS_ENABLED(CONFIG_IPV6) |
613d61db NA |
4048 | brmctx->multicast_mld_version = 1; |
4049 | brmctx->ip6_other_query.delay_time = 0; | |
bb18ef8e | 4050 | brmctx->ip6_querier.port_ifidx = 0; |
f936bb42 | 4051 | seqcount_spinlock_init(&brmctx->ip6_querier.seq, &br->multicast_lock); |
cc0fdd80 | 4052 | #endif |
b00589af | 4053 | |
613d61db | 4054 | timer_setup(&brmctx->ip4_mc_router_timer, |
ee5fb222 | 4055 | br_ip4_multicast_local_router_expired, 0); |
613d61db | 4056 | timer_setup(&brmctx->ip4_other_query.timer, |
88c1f37f | 4057 | br_ip4_multicast_querier_expired, 0); |
613d61db | 4058 | timer_setup(&brmctx->ip4_own_query.timer, |
88c1f37f | 4059 | br_ip4_multicast_query_expired, 0); |
cc0fdd80 | 4060 | #if IS_ENABLED(CONFIG_IPV6) |
613d61db | 4061 | timer_setup(&brmctx->ip6_mc_router_timer, |
a3c02e76 | 4062 | br_ip6_multicast_local_router_expired, 0); |
613d61db | 4063 | timer_setup(&brmctx->ip6_other_query.timer, |
88c1f37f | 4064 | br_ip6_multicast_querier_expired, 0); |
613d61db | 4065 | timer_setup(&brmctx->ip6_own_query.timer, |
88c1f37f | 4066 | br_ip6_multicast_query_expired, 0); |
cc0fdd80 | 4067 | #endif |
613d61db NA |
4068 | } |
4069 | ||
4070 | void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) | |
4071 | { | |
4072 | __br_multicast_stop(brmctx); | |
4073 | } | |
4074 | ||
4075 | void br_multicast_init(struct net_bridge *br) | |
4076 | { | |
4077 | br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX; | |
4078 | ||
4079 | br_multicast_ctx_init(br, NULL, &br->multicast_ctx); | |
4080 | ||
4081 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true); | |
4082 | br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true); | |
4083 | ||
4084 | spin_lock_init(&br->multicast_lock); | |
19e3a9c9 | 4085 | INIT_HLIST_HEAD(&br->mdb_list); |
e12cec65 NA |
4086 | INIT_HLIST_HEAD(&br->mcast_gc_list); |
4087 | INIT_WORK(&br->mcast_gc_work, br_multicast_gc_work); | |
eb1d1641 HX |
4088 | } |
4089 | ||
4effd28c LL |
4090 | static void br_ip4_multicast_join_snoopers(struct net_bridge *br) |
4091 | { | |
4092 | struct in_device *in_dev = in_dev_get(br->dev); | |
4093 | ||
4094 | if (!in_dev) | |
4095 | return; | |
4096 | ||
9fb20801 | 4097 | __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC); |
4effd28c LL |
4098 | in_dev_put(in_dev); |
4099 | } | |
4100 | ||
4101 | #if IS_ENABLED(CONFIG_IPV6) | |
4102 | static void br_ip6_multicast_join_snoopers(struct net_bridge *br) | |
4103 | { | |
4104 | struct in6_addr addr; | |
4105 | ||
4106 | ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a)); | |
4107 | ipv6_dev_mc_inc(br->dev, &addr); | |
4108 | } | |
4109 | #else | |
4110 | static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br) | |
4111 | { | |
4112 | } | |
4113 | #endif | |
4114 | ||
851d0a73 | 4115 | void br_multicast_join_snoopers(struct net_bridge *br) |
4effd28c LL |
4116 | { |
4117 | br_ip4_multicast_join_snoopers(br); | |
4118 | br_ip6_multicast_join_snoopers(br); | |
4119 | } | |
4120 | ||
4121 | static void br_ip4_multicast_leave_snoopers(struct net_bridge *br) | |
4122 | { | |
4123 | struct in_device *in_dev = in_dev_get(br->dev); | |
4124 | ||
4125 | if (WARN_ON(!in_dev)) | |
4126 | return; | |
4127 | ||
9fb20801 | 4128 | __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC); |
4effd28c LL |
4129 | in_dev_put(in_dev); |
4130 | } | |
4131 | ||
4132 | #if IS_ENABLED(CONFIG_IPV6) | |
4133 | static void br_ip6_multicast_leave_snoopers(struct net_bridge *br) | |
4134 | { | |
4135 | struct in6_addr addr; | |
4136 | ||
4137 | ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a)); | |
4138 | ipv6_dev_mc_dec(br->dev, &addr); | |
4139 | } | |
4140 | #else | |
4141 | static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br) | |
4142 | { | |
4143 | } | |
4144 | #endif | |
4145 | ||
851d0a73 | 4146 | void br_multicast_leave_snoopers(struct net_bridge *br) |
4effd28c LL |
4147 | { |
4148 | br_ip4_multicast_leave_snoopers(br); | |
4149 | br_ip6_multicast_leave_snoopers(br); | |
4150 | } | |
4151 | ||
7b54aaaf NA |
4152 | static void __br_multicast_open_query(struct net_bridge *br, |
4153 | struct bridge_mcast_own_query *query) | |
eb1d1641 | 4154 | { |
cc0fdd80 | 4155 | query->startup_sent = 0; |
eb1d1641 | 4156 | |
13cefad2 | 4157 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
eb1d1641 HX |
4158 | return; |
4159 | ||
cc0fdd80 LL |
4160 | mod_timer(&query->timer, jiffies); |
4161 | } | |
4162 | ||
7b54aaaf | 4163 | static void __br_multicast_open(struct net_bridge_mcast *brmctx) |
cc0fdd80 | 4164 | { |
7b54aaaf | 4165 | __br_multicast_open_query(brmctx->br, &brmctx->ip4_own_query); |
cc0fdd80 | 4166 | #if IS_ENABLED(CONFIG_IPV6) |
7b54aaaf | 4167 | __br_multicast_open_query(brmctx->br, &brmctx->ip6_own_query); |
cc0fdd80 | 4168 | #endif |
eb1d1641 HX |
4169 | } |
4170 | ||
7b54aaaf NA |
4171 | void br_multicast_open(struct net_bridge *br) |
4172 | { | |
7b54aaaf NA |
4173 | ASSERT_RTNL(); |
4174 | ||
f4b7002a NA |
4175 | if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) { |
4176 | struct net_bridge_vlan_group *vg; | |
4177 | struct net_bridge_vlan *vlan; | |
4178 | ||
4179 | vg = br_vlan_group(br); | |
4180 | if (vg) { | |
4181 | list_for_each_entry(vlan, &vg->vlan_list, vlist) { | |
4182 | struct net_bridge_mcast *brmctx; | |
4183 | ||
4184 | brmctx = &vlan->br_mcast_ctx; | |
4185 | if (br_vlan_is_brentry(vlan) && | |
4186 | !br_multicast_ctx_vlan_disabled(brmctx)) | |
4187 | __br_multicast_open(&vlan->br_mcast_ctx); | |
4188 | } | |
7b54aaaf | 4189 | } |
cb486ce9 NA |
4190 | } else { |
4191 | __br_multicast_open(&br->multicast_ctx); | |
7b54aaaf | 4192 | } |
7b54aaaf NA |
4193 | } |
4194 | ||
613d61db | 4195 | static void __br_multicast_stop(struct net_bridge_mcast *brmctx) |
eb1d1641 | 4196 | { |
613d61db NA |
4197 | del_timer_sync(&brmctx->ip4_mc_router_timer); |
4198 | del_timer_sync(&brmctx->ip4_other_query.timer); | |
4199 | del_timer_sync(&brmctx->ip4_own_query.timer); | |
cc0fdd80 | 4200 | #if IS_ENABLED(CONFIG_IPV6) |
613d61db NA |
4201 | del_timer_sync(&brmctx->ip6_mc_router_timer); |
4202 | del_timer_sync(&brmctx->ip6_other_query.timer); | |
4203 | del_timer_sync(&brmctx->ip6_own_query.timer); | |
cc0fdd80 | 4204 | #endif |
e10177ab SA |
4205 | } |
4206 | ||
7b54aaaf NA |
4207 | void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on) |
4208 | { | |
4209 | struct net_bridge *br; | |
4210 | ||
4211 | /* it's okay to check for the flag without the multicast lock because it | |
4212 | * can only change under RTNL -> multicast_lock, we need the latter to | |
4213 | * sync with timers and packets | |
4214 | */ | |
4215 | if (on == !!(vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED)) | |
4216 | return; | |
4217 | ||
4218 | if (br_vlan_is_master(vlan)) { | |
4219 | br = vlan->br; | |
4220 | ||
4221 | if (!br_vlan_is_brentry(vlan) || | |
4222 | (on && | |
4223 | br_multicast_ctx_vlan_global_disabled(&vlan->br_mcast_ctx))) | |
4224 | return; | |
4225 | ||
4226 | spin_lock_bh(&br->multicast_lock); | |
4227 | vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED; | |
4228 | spin_unlock_bh(&br->multicast_lock); | |
4229 | ||
4230 | if (on) | |
4231 | __br_multicast_open(&vlan->br_mcast_ctx); | |
4232 | else | |
4233 | __br_multicast_stop(&vlan->br_mcast_ctx); | |
4234 | } else { | |
4235 | struct net_bridge_mcast *brmctx; | |
4236 | ||
4237 | brmctx = br_multicast_port_ctx_get_global(&vlan->port_mcast_ctx); | |
4238 | if (on && br_multicast_ctx_vlan_global_disabled(brmctx)) | |
4239 | return; | |
4240 | ||
4241 | br = vlan->port->br; | |
4242 | spin_lock_bh(&br->multicast_lock); | |
4243 | vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED; | |
4244 | if (on) | |
4245 | __br_multicast_enable_port_ctx(&vlan->port_mcast_ctx); | |
4246 | else | |
4247 | __br_multicast_disable_port_ctx(&vlan->port_mcast_ctx); | |
4248 | spin_unlock_bh(&br->multicast_lock); | |
4249 | } | |
4250 | } | |
4251 | ||
affce9a7 | 4252 | static void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on) |
f4b7002a NA |
4253 | { |
4254 | struct net_bridge_port *p; | |
4255 | ||
4256 | if (WARN_ON_ONCE(!br_vlan_is_master(vlan))) | |
4257 | return; | |
4258 | ||
4259 | list_for_each_entry(p, &vlan->br->port_list, list) { | |
4260 | struct net_bridge_vlan *vport; | |
4261 | ||
4262 | vport = br_vlan_find(nbp_vlan_group(p), vlan->vid); | |
4263 | if (!vport) | |
4264 | continue; | |
4265 | br_multicast_toggle_one_vlan(vport, on); | |
4266 | } | |
affce9a7 NA |
4267 | |
4268 | if (br_vlan_is_brentry(vlan)) | |
4269 | br_multicast_toggle_one_vlan(vlan, on); | |
f4b7002a NA |
4270 | } |
4271 | ||
4272 | int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, | |
4273 | struct netlink_ext_ack *extack) | |
613d61db | 4274 | { |
7b54aaaf NA |
4275 | struct net_bridge_vlan_group *vg; |
4276 | struct net_bridge_vlan *vlan; | |
f4b7002a | 4277 | struct net_bridge_port *p; |
7b54aaaf | 4278 | |
f4b7002a NA |
4279 | if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) == on) |
4280 | return 0; | |
4281 | ||
4282 | if (on && !br_opt_get(br, BROPT_VLAN_ENABLED)) { | |
4283 | NL_SET_ERR_MSG_MOD(extack, "Cannot enable multicast vlan snooping with vlan filtering disabled"); | |
4284 | return -EINVAL; | |
4285 | } | |
7b54aaaf NA |
4286 | |
4287 | vg = br_vlan_group(br); | |
f4b7002a NA |
4288 | if (!vg) |
4289 | return 0; | |
4290 | ||
4291 | br_opt_toggle(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED, on); | |
4292 | ||
4293 | /* disable/enable non-vlan mcast contexts based on vlan snooping */ | |
4294 | if (on) | |
4295 | __br_multicast_stop(&br->multicast_ctx); | |
4296 | else | |
4297 | __br_multicast_open(&br->multicast_ctx); | |
4298 | list_for_each_entry(p, &br->port_list, list) { | |
4299 | if (on) | |
4300 | br_multicast_disable_port(p); | |
4301 | else | |
4302 | br_multicast_enable_port(p); | |
4303 | } | |
4304 | ||
4305 | list_for_each_entry(vlan, &vg->vlan_list, vlist) | |
4306 | br_multicast_toggle_vlan(vlan, on); | |
4307 | ||
4308 | return 0; | |
4309 | } | |
4310 | ||
9dee572c NA |
4311 | bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on) |
4312 | { | |
4313 | ASSERT_RTNL(); | |
4314 | ||
4315 | /* BR_VLFLAG_GLOBAL_MCAST_ENABLED relies on eventual consistency and | |
4316 | * requires only RTNL to change | |
4317 | */ | |
4318 | if (on == !!(vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)) | |
4319 | return false; | |
4320 | ||
4321 | vlan->priv_flags ^= BR_VLFLAG_GLOBAL_MCAST_ENABLED; | |
4322 | br_multicast_toggle_vlan(vlan, on); | |
4323 | ||
4324 | return true; | |
4325 | } | |
4326 | ||
f4b7002a NA |
4327 | void br_multicast_stop(struct net_bridge *br) |
4328 | { | |
4329 | ASSERT_RTNL(); | |
4330 | ||
4331 | if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) { | |
4332 | struct net_bridge_vlan_group *vg; | |
4333 | struct net_bridge_vlan *vlan; | |
4334 | ||
4335 | vg = br_vlan_group(br); | |
4336 | if (vg) { | |
4337 | list_for_each_entry(vlan, &vg->vlan_list, vlist) { | |
4338 | struct net_bridge_mcast *brmctx; | |
4339 | ||
4340 | brmctx = &vlan->br_mcast_ctx; | |
4341 | if (br_vlan_is_brentry(vlan) && | |
4342 | !br_multicast_ctx_vlan_disabled(brmctx)) | |
4343 | __br_multicast_stop(&vlan->br_mcast_ctx); | |
4344 | } | |
7b54aaaf | 4345 | } |
cb486ce9 NA |
4346 | } else { |
4347 | __br_multicast_stop(&br->multicast_ctx); | |
7b54aaaf | 4348 | } |
613d61db NA |
4349 | } |
4350 | ||
e10177ab SA |
4351 | void br_multicast_dev_del(struct net_bridge *br) |
4352 | { | |
e10177ab | 4353 | struct net_bridge_mdb_entry *mp; |
8b671779 | 4354 | HLIST_HEAD(deleted_head); |
19e3a9c9 | 4355 | struct hlist_node *tmp; |
eb1d1641 HX |
4356 | |
4357 | spin_lock_bh(&br->multicast_lock); | |
e12cec65 NA |
4358 | hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node) |
4359 | br_multicast_del_mdb_entry(mp); | |
4360 | hlist_move_list(&br->mcast_gc_list, &deleted_head); | |
eb1d1641 | 4361 | spin_unlock_bh(&br->multicast_lock); |
19e3a9c9 | 4362 | |
613d61db | 4363 | br_multicast_ctx_deinit(&br->multicast_ctx); |
e12cec65 NA |
4364 | br_multicast_gc(&deleted_head); |
4365 | cancel_work_sync(&br->mcast_gc_work); | |
8b671779 | 4366 | |
4329596c | 4367 | rcu_barrier(); |
eb1d1641 | 4368 | } |
0909e117 | 4369 | |
a97df080 | 4370 | int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val) |
0909e117 | 4371 | { |
6ae4ae8e | 4372 | int err = -EINVAL; |
0909e117 | 4373 | |
a97df080 | 4374 | spin_lock_bh(&brmctx->br->multicast_lock); |
0909e117 HX |
4375 | |
4376 | switch (val) { | |
7f0aec7a NA |
4377 | case MDB_RTR_TYPE_DISABLED: |
4378 | case MDB_RTR_TYPE_PERM: | |
a97df080 | 4379 | br_mc_router_state_change(brmctx->br, val == MDB_RTR_TYPE_PERM); |
d3d065c0 | 4380 | del_timer(&brmctx->ip4_mc_router_timer); |
a3c02e76 | 4381 | #if IS_ENABLED(CONFIG_IPV6) |
d3d065c0 | 4382 | del_timer(&brmctx->ip6_mc_router_timer); |
a3c02e76 | 4383 | #endif |
d3d065c0 | 4384 | brmctx->multicast_router = val; |
77041420 YG |
4385 | err = 0; |
4386 | break; | |
7f0aec7a | 4387 | case MDB_RTR_TYPE_TEMP_QUERY: |
d3d065c0 | 4388 | if (brmctx->multicast_router != MDB_RTR_TYPE_TEMP_QUERY) |
a97df080 | 4389 | br_mc_router_state_change(brmctx->br, false); |
d3d065c0 | 4390 | brmctx->multicast_router = val; |
0909e117 HX |
4391 | err = 0; |
4392 | break; | |
0909e117 HX |
4393 | } |
4394 | ||
a97df080 | 4395 | spin_unlock_bh(&brmctx->br->multicast_lock); |
0909e117 HX |
4396 | |
4397 | return err; | |
4398 | } | |
4399 | ||
ed2d3597 | 4400 | static void |
adc47037 | 4401 | br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted) |
7f0aec7a | 4402 | { |
ed2d3597 | 4403 | if (!deleted) |
7f0aec7a | 4404 | return; |
ed2d3597 | 4405 | |
a3c02e76 LL |
4406 | /* For backwards compatibility for now, only notify if there is |
4407 | * no multicast router anymore for both IPv4 and IPv6. | |
4408 | */ | |
adc47037 | 4409 | if (!hlist_unhashed(&pmctx->ip4_rlist)) |
a3c02e76 LL |
4410 | return; |
4411 | #if IS_ENABLED(CONFIG_IPV6) | |
adc47037 | 4412 | if (!hlist_unhashed(&pmctx->ip6_rlist)) |
a3c02e76 LL |
4413 | return; |
4414 | #endif | |
4415 | ||
1e9ca456 | 4416 | br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_DELMDB); |
adc47037 | 4417 | br_port_mc_router_state_change(pmctx->port, false); |
f12e7d95 NF |
4418 | |
4419 | /* don't allow timer refresh */ | |
adc47037 NA |
4420 | if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP) |
4421 | pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; | |
7f0aec7a NA |
4422 | } |
4423 | ||
a53581d5 NA |
4424 | int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, |
4425 | unsigned long val) | |
0909e117 | 4426 | { |
a53581d5 | 4427 | struct net_bridge_mcast *brmctx; |
a55d8246 | 4428 | unsigned long now = jiffies; |
6ae4ae8e | 4429 | int err = -EINVAL; |
ed2d3597 | 4430 | bool del = false; |
0909e117 | 4431 | |
a53581d5 | 4432 | brmctx = br_multicast_port_ctx_get_global(pmctx); |
ddd0d529 | 4433 | spin_lock_bh(&brmctx->br->multicast_lock); |
adc47037 | 4434 | if (pmctx->multicast_router == val) { |
a55d8246 | 4435 | /* Refresh the temp router port timer */ |
adc47037 NA |
4436 | if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP) { |
4437 | mod_timer(&pmctx->ip4_mc_router_timer, | |
d3d065c0 | 4438 | now + brmctx->multicast_querier_interval); |
a3c02e76 | 4439 | #if IS_ENABLED(CONFIG_IPV6) |
adc47037 | 4440 | mod_timer(&pmctx->ip6_mc_router_timer, |
d3d065c0 | 4441 | now + brmctx->multicast_querier_interval); |
a3c02e76 LL |
4442 | #endif |
4443 | } | |
4950cfd1 NA |
4444 | err = 0; |
4445 | goto unlock; | |
4446 | } | |
0909e117 | 4447 | switch (val) { |
7f0aec7a | 4448 | case MDB_RTR_TYPE_DISABLED: |
adc47037 NA |
4449 | pmctx->multicast_router = MDB_RTR_TYPE_DISABLED; |
4450 | del |= br_ip4_multicast_rport_del(pmctx); | |
4451 | del_timer(&pmctx->ip4_mc_router_timer); | |
4452 | del |= br_ip6_multicast_rport_del(pmctx); | |
a3c02e76 | 4453 | #if IS_ENABLED(CONFIG_IPV6) |
adc47037 | 4454 | del_timer(&pmctx->ip6_mc_router_timer); |
a3c02e76 | 4455 | #endif |
adc47037 | 4456 | br_multicast_rport_del_notify(pmctx, del); |
7f0aec7a NA |
4457 | break; |
4458 | case MDB_RTR_TYPE_TEMP_QUERY: | |
adc47037 NA |
4459 | pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY; |
4460 | del |= br_ip4_multicast_rport_del(pmctx); | |
4461 | del |= br_ip6_multicast_rport_del(pmctx); | |
4462 | br_multicast_rport_del_notify(pmctx, del); | |
7f0aec7a NA |
4463 | break; |
4464 | case MDB_RTR_TYPE_PERM: | |
adc47037 NA |
4465 | pmctx->multicast_router = MDB_RTR_TYPE_PERM; |
4466 | del_timer(&pmctx->ip4_mc_router_timer); | |
4467 | br_ip4_multicast_add_router(brmctx, pmctx); | |
a3c02e76 | 4468 | #if IS_ENABLED(CONFIG_IPV6) |
adc47037 | 4469 | del_timer(&pmctx->ip6_mc_router_timer); |
a3c02e76 | 4470 | #endif |
adc47037 | 4471 | br_ip6_multicast_add_router(brmctx, pmctx); |
0909e117 | 4472 | break; |
a55d8246 | 4473 | case MDB_RTR_TYPE_TEMP: |
adc47037 NA |
4474 | pmctx->multicast_router = MDB_RTR_TYPE_TEMP; |
4475 | br_ip4_multicast_mark_router(brmctx, pmctx); | |
4476 | br_ip6_multicast_mark_router(brmctx, pmctx); | |
a55d8246 | 4477 | break; |
7f0aec7a NA |
4478 | default: |
4479 | goto unlock; | |
0909e117 | 4480 | } |
7f0aec7a NA |
4481 | err = 0; |
4482 | unlock: | |
ddd0d529 | 4483 | spin_unlock_bh(&brmctx->br->multicast_lock); |
0909e117 HX |
4484 | |
4485 | return err; | |
4486 | } | |
561f1103 | 4487 | |
2796d846 NA |
4488 | int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router) |
4489 | { | |
4490 | int err; | |
4491 | ||
4492 | if (br_vlan_is_master(v)) | |
4493 | err = br_multicast_set_router(&v->br_mcast_ctx, mcast_router); | |
4494 | else | |
4495 | err = br_multicast_set_port_router(&v->port_mcast_ctx, | |
4496 | mcast_router); | |
4497 | ||
4498 | return err; | |
4499 | } | |
4500 | ||
adc47037 | 4501 | static void br_multicast_start_querier(struct net_bridge_mcast *brmctx, |
90010b36 | 4502 | struct bridge_mcast_own_query *query) |
561f1103 HX |
4503 | { |
4504 | struct net_bridge_port *port; | |
74857216 | 4505 | |
cb486ce9 NA |
4506 | if (!br_multicast_ctx_matches_vlan_snooping(brmctx)) |
4507 | return; | |
4508 | ||
7b54aaaf | 4509 | __br_multicast_open_query(brmctx->br, query); |
74857216 | 4510 | |
c5b493ce | 4511 | rcu_read_lock(); |
adc47037 | 4512 | list_for_each_entry_rcu(port, &brmctx->br->port_list, list) { |
615cc23e NA |
4513 | struct bridge_mcast_own_query *ip4_own_query; |
4514 | #if IS_ENABLED(CONFIG_IPV6) | |
4515 | struct bridge_mcast_own_query *ip6_own_query; | |
4516 | #endif | |
4517 | ||
4518 | if (br_multicast_port_ctx_state_stopped(&port->multicast_ctx)) | |
74857216 HX |
4519 | continue; |
4520 | ||
615cc23e NA |
4521 | if (br_multicast_ctx_is_vlan(brmctx)) { |
4522 | struct net_bridge_vlan *vlan; | |
4523 | ||
3f0d14ef NA |
4524 | vlan = br_vlan_find(nbp_vlan_group_rcu(port), |
4525 | brmctx->vlan->vid); | |
615cc23e NA |
4526 | if (!vlan || |
4527 | br_multicast_port_ctx_state_stopped(&vlan->port_mcast_ctx)) | |
4528 | continue; | |
4529 | ||
4530 | ip4_own_query = &vlan->port_mcast_ctx.ip4_own_query; | |
4531 | #if IS_ENABLED(CONFIG_IPV6) | |
4532 | ip6_own_query = &vlan->port_mcast_ctx.ip6_own_query; | |
4533 | #endif | |
4534 | } else { | |
4535 | ip4_own_query = &port->multicast_ctx.ip4_own_query; | |
4536 | #if IS_ENABLED(CONFIG_IPV6) | |
4537 | ip6_own_query = &port->multicast_ctx.ip6_own_query; | |
4538 | #endif | |
4539 | } | |
4540 | ||
adc47037 | 4541 | if (query == &brmctx->ip4_own_query) |
615cc23e | 4542 | br_multicast_enable(ip4_own_query); |
cc0fdd80 LL |
4543 | #if IS_ENABLED(CONFIG_IPV6) |
4544 | else | |
615cc23e | 4545 | br_multicast_enable(ip6_own_query); |
cc0fdd80 | 4546 | #endif |
74857216 | 4547 | } |
c5b493ce | 4548 | rcu_read_unlock(); |
74857216 HX |
4549 | } |
4550 | ||
ae1ea84b FF |
4551 | int br_multicast_toggle(struct net_bridge *br, unsigned long val, |
4552 | struct netlink_ext_ack *extack) | |
74857216 | 4553 | { |
7cb3f921 | 4554 | struct net_bridge_port *port; |
851d0a73 | 4555 | bool change_snoopers = false; |
ae1ea84b | 4556 | int err = 0; |
561f1103 | 4557 | |
ef5e0d82 | 4558 | spin_lock_bh(&br->multicast_lock); |
13cefad2 | 4559 | if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val) |
561f1103 HX |
4560 | goto unlock; |
4561 | ||
ae1ea84b FF |
4562 | err = br_mc_disabled_update(br->dev, val, extack); |
4563 | if (err == -EOPNOTSUPP) | |
4564 | err = 0; | |
4565 | if (err) | |
4566 | goto unlock; | |
4567 | ||
13cefad2 | 4568 | br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val); |
4effd28c | 4569 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) { |
851d0a73 | 4570 | change_snoopers = true; |
561f1103 | 4571 | goto unlock; |
4effd28c | 4572 | } |
561f1103 | 4573 | |
3a7fda06 HX |
4574 | if (!netif_running(br->dev)) |
4575 | goto unlock; | |
4576 | ||
7cb3f921 NA |
4577 | br_multicast_open(br); |
4578 | list_for_each_entry(port, &br->port_list, list) | |
adc47037 | 4579 | __br_multicast_enable_port_ctx(&port->multicast_ctx); |
561f1103 | 4580 | |
851d0a73 JH |
4581 | change_snoopers = true; |
4582 | ||
561f1103 | 4583 | unlock: |
ef5e0d82 | 4584 | spin_unlock_bh(&br->multicast_lock); |
561f1103 | 4585 | |
851d0a73 JH |
4586 | /* br_multicast_join_snoopers has the potential to cause |
4587 | * an MLD Report/Leave to be delivered to br_multicast_rcv, | |
4588 | * which would in turn call br_multicast_add_group, which would | |
4589 | * attempt to acquire multicast_lock. This function should be | |
4590 | * called after the lock has been released to avoid deadlocks on | |
4591 | * multicast_lock. | |
4592 | * | |
4593 | * br_multicast_leave_snoopers does not have the problem since | |
4594 | * br_multicast_rcv first checks BROPT_MULTICAST_ENABLED, and | |
4595 | * returns without calling br_multicast_ipv4/6_rcv if it's not | |
4596 | * enabled. Moved both functions out just for symmetry. | |
4597 | */ | |
4598 | if (change_snoopers) { | |
4599 | if (br_opt_get(br, BROPT_MULTICAST_ENABLED)) | |
4600 | br_multicast_join_snoopers(br); | |
4601 | else | |
4602 | br_multicast_leave_snoopers(br); | |
4603 | } | |
4604 | ||
ae1ea84b | 4605 | return err; |
561f1103 | 4606 | } |
b195167f | 4607 | |
9341b988 IS |
4608 | bool br_multicast_enabled(const struct net_device *dev) |
4609 | { | |
4610 | struct net_bridge *br = netdev_priv(dev); | |
4611 | ||
13cefad2 | 4612 | return !!br_opt_get(br, BROPT_MULTICAST_ENABLED); |
9341b988 IS |
4613 | } |
4614 | EXPORT_SYMBOL_GPL(br_multicast_enabled); | |
4615 | ||
0912bda4 YG |
4616 | bool br_multicast_router(const struct net_device *dev) |
4617 | { | |
4618 | struct net_bridge *br = netdev_priv(dev); | |
4619 | bool is_router; | |
4620 | ||
4621 | spin_lock_bh(&br->multicast_lock); | |
adc47037 | 4622 | is_router = br_multicast_is_router(&br->multicast_ctx, NULL); |
0912bda4 YG |
4623 | spin_unlock_bh(&br->multicast_lock); |
4624 | return is_router; | |
4625 | } | |
4626 | EXPORT_SYMBOL_GPL(br_multicast_router); | |
4627 | ||
62938182 | 4628 | int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val) |
c5c23260 | 4629 | { |
b00589af LL |
4630 | unsigned long max_delay; |
4631 | ||
c5c23260 HX |
4632 | val = !!val; |
4633 | ||
62938182 | 4634 | spin_lock_bh(&brmctx->br->multicast_lock); |
4d5b4e84 | 4635 | if (brmctx->multicast_querier == val) |
c5c23260 HX |
4636 | goto unlock; |
4637 | ||
4d5b4e84 | 4638 | WRITE_ONCE(brmctx->multicast_querier, val); |
b00589af LL |
4639 | if (!val) |
4640 | goto unlock; | |
4641 | ||
d3d065c0 | 4642 | max_delay = brmctx->multicast_query_response_interval; |
b00589af | 4643 | |
d3d065c0 NA |
4644 | if (!timer_pending(&brmctx->ip4_other_query.timer)) |
4645 | brmctx->ip4_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 4646 | |
adc47037 | 4647 | br_multicast_start_querier(brmctx, &brmctx->ip4_own_query); |
cc0fdd80 LL |
4648 | |
4649 | #if IS_ENABLED(CONFIG_IPV6) | |
d3d065c0 NA |
4650 | if (!timer_pending(&brmctx->ip6_other_query.timer)) |
4651 | brmctx->ip6_other_query.delay_time = jiffies + max_delay; | |
cc0fdd80 | 4652 | |
adc47037 | 4653 | br_multicast_start_querier(brmctx, &brmctx->ip6_own_query); |
cc0fdd80 | 4654 | #endif |
c5c23260 HX |
4655 | |
4656 | unlock: | |
62938182 | 4657 | spin_unlock_bh(&brmctx->br->multicast_lock); |
c5c23260 HX |
4658 | |
4659 | return 0; | |
4660 | } | |
4661 | ||
df271cd6 NA |
4662 | int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, |
4663 | unsigned long val) | |
5e923585 NA |
4664 | { |
4665 | /* Currently we support only version 2 and 3 */ | |
4666 | switch (val) { | |
4667 | case 2: | |
4668 | case 3: | |
4669 | break; | |
4670 | default: | |
4671 | return -EINVAL; | |
4672 | } | |
4673 | ||
df271cd6 NA |
4674 | spin_lock_bh(&brmctx->br->multicast_lock); |
4675 | brmctx->multicast_igmp_version = val; | |
4676 | spin_unlock_bh(&brmctx->br->multicast_lock); | |
5e923585 NA |
4677 | |
4678 | return 0; | |
4679 | } | |
4680 | ||
aa2ae3e7 | 4681 | #if IS_ENABLED(CONFIG_IPV6) |
df271cd6 NA |
4682 | int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, |
4683 | unsigned long val) | |
aa2ae3e7 NA |
4684 | { |
4685 | /* Currently we support version 1 and 2 */ | |
4686 | switch (val) { | |
4687 | case 1: | |
4688 | case 2: | |
4689 | break; | |
4690 | default: | |
4691 | return -EINVAL; | |
4692 | } | |
4693 | ||
df271cd6 NA |
4694 | spin_lock_bh(&brmctx->br->multicast_lock); |
4695 | brmctx->multicast_mld_version = val; | |
4696 | spin_unlock_bh(&brmctx->br->multicast_lock); | |
aa2ae3e7 NA |
4697 | |
4698 | return 0; | |
4699 | } | |
4700 | #endif | |
4701 | ||
99b40610 NA |
4702 | void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, |
4703 | unsigned long val) | |
4704 | { | |
4705 | unsigned long intvl_jiffies = clock_t_to_jiffies(val); | |
4706 | ||
4707 | if (intvl_jiffies < BR_MULTICAST_QUERY_INTVL_MIN) { | |
4708 | br_info(brmctx->br, | |
4709 | "trying to set multicast query interval below minimum, setting to %lu (%ums)\n", | |
4710 | jiffies_to_clock_t(BR_MULTICAST_QUERY_INTVL_MIN), | |
4711 | jiffies_to_msecs(BR_MULTICAST_QUERY_INTVL_MIN)); | |
4712 | intvl_jiffies = BR_MULTICAST_QUERY_INTVL_MIN; | |
4713 | } | |
4714 | ||
4715 | brmctx->multicast_query_interval = intvl_jiffies; | |
4716 | } | |
4717 | ||
f83a112b NA |
4718 | void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, |
4719 | unsigned long val) | |
4720 | { | |
4721 | unsigned long intvl_jiffies = clock_t_to_jiffies(val); | |
4722 | ||
4723 | if (intvl_jiffies < BR_MULTICAST_STARTUP_QUERY_INTVL_MIN) { | |
4724 | br_info(brmctx->br, | |
4725 | "trying to set multicast startup query interval below minimum, setting to %lu (%ums)\n", | |
4726 | jiffies_to_clock_t(BR_MULTICAST_STARTUP_QUERY_INTVL_MIN), | |
4727 | jiffies_to_msecs(BR_MULTICAST_STARTUP_QUERY_INTVL_MIN)); | |
4728 | intvl_jiffies = BR_MULTICAST_STARTUP_QUERY_INTVL_MIN; | |
4729 | } | |
4730 | ||
4731 | brmctx->multicast_startup_query_interval = intvl_jiffies; | |
4732 | } | |
4733 | ||
07f8ac4a LL |
4734 | /** |
4735 | * br_multicast_list_adjacent - Returns snooped multicast addresses | |
4736 | * @dev: The bridge port adjacent to which to retrieve addresses | |
4737 | * @br_ip_list: The list to store found, snooped multicast IP addresses in | |
4738 | * | |
4739 | * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast | |
4740 | * snooping feature on all bridge ports of dev's bridge device, excluding | |
4741 | * the addresses from dev itself. | |
4742 | * | |
4743 | * Returns the number of items added to br_ip_list. | |
4744 | * | |
4745 | * Notes: | |
4746 | * - br_ip_list needs to be initialized by caller | |
4747 | * - br_ip_list might contain duplicates in the end | |
4748 | * (needs to be taken care of by caller) | |
4749 | * - br_ip_list needs to be freed by caller | |
4750 | */ | |
4751 | int br_multicast_list_adjacent(struct net_device *dev, | |
4752 | struct list_head *br_ip_list) | |
4753 | { | |
4754 | struct net_bridge *br; | |
4755 | struct net_bridge_port *port; | |
4756 | struct net_bridge_port_group *group; | |
4757 | struct br_ip_list *entry; | |
4758 | int count = 0; | |
4759 | ||
4760 | rcu_read_lock(); | |
35f861e3 | 4761 | if (!br_ip_list || !netif_is_bridge_port(dev)) |
07f8ac4a LL |
4762 | goto unlock; |
4763 | ||
4764 | port = br_port_get_rcu(dev); | |
4765 | if (!port || !port->br) | |
4766 | goto unlock; | |
4767 | ||
4768 | br = port->br; | |
4769 | ||
4770 | list_for_each_entry_rcu(port, &br->port_list, list) { | |
4771 | if (!port->dev || port->dev == dev) | |
4772 | continue; | |
4773 | ||
4774 | hlist_for_each_entry_rcu(group, &port->mglist, mglist) { | |
4775 | entry = kmalloc(sizeof(*entry), GFP_ATOMIC); | |
4776 | if (!entry) | |
4777 | goto unlock; | |
4778 | ||
085b53c8 | 4779 | entry->addr = group->key.addr; |
07f8ac4a LL |
4780 | list_add(&entry->list, br_ip_list); |
4781 | count++; | |
4782 | } | |
4783 | } | |
4784 | ||
4785 | unlock: | |
4786 | rcu_read_unlock(); | |
4787 | return count; | |
4788 | } | |
4789 | EXPORT_SYMBOL_GPL(br_multicast_list_adjacent); | |
2cd41431 | 4790 | |
c34963e2 LL |
4791 | /** |
4792 | * br_multicast_has_querier_anywhere - Checks for a querier on a bridge | |
4793 | * @dev: The bridge port providing the bridge on which to check for a querier | |
4794 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
4795 | * | |
4796 | * Checks whether the given interface has a bridge on top and if so returns | |
4797 | * true if a valid querier exists anywhere on the bridged link layer. | |
4798 | * Otherwise returns false. | |
4799 | */ | |
4800 | bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto) | |
4801 | { | |
4802 | struct net_bridge *br; | |
4803 | struct net_bridge_port *port; | |
4804 | struct ethhdr eth; | |
4805 | bool ret = false; | |
4806 | ||
4807 | rcu_read_lock(); | |
35f861e3 | 4808 | if (!netif_is_bridge_port(dev)) |
c34963e2 LL |
4809 | goto unlock; |
4810 | ||
4811 | port = br_port_get_rcu(dev); | |
4812 | if (!port || !port->br) | |
4813 | goto unlock; | |
4814 | ||
4815 | br = port->br; | |
4816 | ||
4817 | memset(ð, 0, sizeof(eth)); | |
4818 | eth.h_proto = htons(proto); | |
4819 | ||
adc47037 | 4820 | ret = br_multicast_querier_exists(&br->multicast_ctx, ð, NULL); |
c34963e2 LL |
4821 | |
4822 | unlock: | |
4823 | rcu_read_unlock(); | |
4824 | return ret; | |
4825 | } | |
4826 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere); | |
4827 | ||
2cd41431 LL |
4828 | /** |
4829 | * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port | |
4830 | * @dev: The bridge port adjacent to which to check for a querier | |
4831 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
4832 | * | |
4833 | * Checks whether the given interface has a bridge on top and if so returns | |
4834 | * true if a selected querier is behind one of the other ports of this | |
4835 | * bridge. Otherwise returns false. | |
4836 | */ | |
4837 | bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto) | |
4838 | { | |
d3d065c0 | 4839 | struct net_bridge_mcast *brmctx; |
2cd41431 LL |
4840 | struct net_bridge *br; |
4841 | struct net_bridge_port *port; | |
4842 | bool ret = false; | |
bb18ef8e | 4843 | int port_ifidx; |
2cd41431 LL |
4844 | |
4845 | rcu_read_lock(); | |
35f861e3 | 4846 | if (!netif_is_bridge_port(dev)) |
2cd41431 LL |
4847 | goto unlock; |
4848 | ||
4849 | port = br_port_get_rcu(dev); | |
4850 | if (!port || !port->br) | |
4851 | goto unlock; | |
4852 | ||
4853 | br = port->br; | |
d3d065c0 | 4854 | brmctx = &br->multicast_ctx; |
2cd41431 LL |
4855 | |
4856 | switch (proto) { | |
4857 | case ETH_P_IP: | |
bb18ef8e | 4858 | port_ifidx = brmctx->ip4_querier.port_ifidx; |
d3d065c0 | 4859 | if (!timer_pending(&brmctx->ip4_other_query.timer) || |
bb18ef8e | 4860 | port_ifidx == port->dev->ifindex) |
2cd41431 LL |
4861 | goto unlock; |
4862 | break; | |
3993c4e1 | 4863 | #if IS_ENABLED(CONFIG_IPV6) |
2cd41431 | 4864 | case ETH_P_IPV6: |
bb18ef8e | 4865 | port_ifidx = brmctx->ip6_querier.port_ifidx; |
d3d065c0 | 4866 | if (!timer_pending(&brmctx->ip6_other_query.timer) || |
bb18ef8e | 4867 | port_ifidx == port->dev->ifindex) |
2cd41431 LL |
4868 | goto unlock; |
4869 | break; | |
3993c4e1 | 4870 | #endif |
2cd41431 LL |
4871 | default: |
4872 | goto unlock; | |
4873 | } | |
4874 | ||
4875 | ret = true; | |
4876 | unlock: | |
4877 | rcu_read_unlock(); | |
4878 | return ret; | |
4879 | } | |
4880 | EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent); | |
1080ab95 | 4881 | |
3b85f9ba LL |
4882 | /** |
4883 | * br_multicast_has_router_adjacent - Checks for a router behind a bridge port | |
4884 | * @dev: The bridge port adjacent to which to check for a multicast router | |
4885 | * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6 | |
4886 | * | |
4887 | * Checks whether the given interface has a bridge on top and if so returns | |
4888 | * true if a multicast router is behind one of the other ports of this | |
4889 | * bridge. Otherwise returns false. | |
4890 | */ | |
4891 | bool br_multicast_has_router_adjacent(struct net_device *dev, int proto) | |
4892 | { | |
9632233e | 4893 | struct net_bridge_mcast_port *pmctx; |
d3d065c0 | 4894 | struct net_bridge_mcast *brmctx; |
9632233e | 4895 | struct net_bridge_port *port; |
3b85f9ba LL |
4896 | bool ret = false; |
4897 | ||
4898 | rcu_read_lock(); | |
4899 | port = br_port_get_check_rcu(dev); | |
4900 | if (!port) | |
4901 | goto unlock; | |
4902 | ||
d3d065c0 | 4903 | brmctx = &port->br->multicast_ctx; |
3b85f9ba LL |
4904 | switch (proto) { |
4905 | case ETH_P_IP: | |
d3d065c0 | 4906 | hlist_for_each_entry_rcu(pmctx, &brmctx->ip4_mc_router_list, |
3b85f9ba | 4907 | ip4_rlist) { |
9632233e | 4908 | if (pmctx->port == port) |
3b85f9ba LL |
4909 | continue; |
4910 | ||
4911 | ret = true; | |
4912 | goto unlock; | |
4913 | } | |
4914 | break; | |
4915 | #if IS_ENABLED(CONFIG_IPV6) | |
4916 | case ETH_P_IPV6: | |
d3d065c0 | 4917 | hlist_for_each_entry_rcu(pmctx, &brmctx->ip6_mc_router_list, |
3b85f9ba | 4918 | ip6_rlist) { |
9632233e | 4919 | if (pmctx->port == port) |
3b85f9ba LL |
4920 | continue; |
4921 | ||
4922 | ret = true; | |
4923 | goto unlock; | |
4924 | } | |
4925 | break; | |
4926 | #endif | |
4927 | default: | |
4928 | /* when compiled without IPv6 support, be conservative and | |
4929 | * always assume presence of an IPv6 multicast router | |
4930 | */ | |
4931 | ret = true; | |
4932 | } | |
4933 | ||
4934 | unlock: | |
4935 | rcu_read_unlock(); | |
4936 | return ret; | |
4937 | } | |
4938 | EXPORT_SYMBOL_GPL(br_multicast_has_router_adjacent); | |
4939 | ||
1080ab95 | 4940 | static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats, |
a65056ec | 4941 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
4942 | { |
4943 | struct bridge_mcast_stats *pstats = this_cpu_ptr(stats); | |
a65056ec NA |
4944 | __be16 proto = skb->protocol; |
4945 | unsigned int t_len; | |
1080ab95 NA |
4946 | |
4947 | u64_stats_update_begin(&pstats->syncp); | |
4948 | switch (proto) { | |
4949 | case htons(ETH_P_IP): | |
a65056ec | 4950 | t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb); |
1080ab95 NA |
4951 | switch (type) { |
4952 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
4953 | pstats->mstats.igmp_v1reports[dir]++; | |
4954 | break; | |
4955 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
4956 | pstats->mstats.igmp_v2reports[dir]++; | |
4957 | break; | |
4958 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
4959 | pstats->mstats.igmp_v3reports[dir]++; | |
4960 | break; | |
4961 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
a65056ec NA |
4962 | if (t_len != sizeof(struct igmphdr)) { |
4963 | pstats->mstats.igmp_v3queries[dir]++; | |
4964 | } else { | |
4965 | unsigned int offset = skb_transport_offset(skb); | |
4966 | struct igmphdr *ih, _ihdr; | |
4967 | ||
4968 | ih = skb_header_pointer(skb, offset, | |
4969 | sizeof(_ihdr), &_ihdr); | |
4970 | if (!ih) | |
4971 | break; | |
4972 | if (!ih->code) | |
4973 | pstats->mstats.igmp_v1queries[dir]++; | |
4974 | else | |
4975 | pstats->mstats.igmp_v2queries[dir]++; | |
4976 | } | |
1080ab95 NA |
4977 | break; |
4978 | case IGMP_HOST_LEAVE_MESSAGE: | |
4979 | pstats->mstats.igmp_leaves[dir]++; | |
4980 | break; | |
4981 | } | |
4982 | break; | |
4983 | #if IS_ENABLED(CONFIG_IPV6) | |
4984 | case htons(ETH_P_IPV6): | |
a65056ec NA |
4985 | t_len = ntohs(ipv6_hdr(skb)->payload_len) + |
4986 | sizeof(struct ipv6hdr); | |
4987 | t_len -= skb_network_header_len(skb); | |
1080ab95 NA |
4988 | switch (type) { |
4989 | case ICMPV6_MGM_REPORT: | |
4990 | pstats->mstats.mld_v1reports[dir]++; | |
4991 | break; | |
4992 | case ICMPV6_MLD2_REPORT: | |
4993 | pstats->mstats.mld_v2reports[dir]++; | |
4994 | break; | |
4995 | case ICMPV6_MGM_QUERY: | |
a65056ec NA |
4996 | if (t_len != sizeof(struct mld_msg)) |
4997 | pstats->mstats.mld_v2queries[dir]++; | |
4998 | else | |
4999 | pstats->mstats.mld_v1queries[dir]++; | |
1080ab95 NA |
5000 | break; |
5001 | case ICMPV6_MGM_REDUCTION: | |
5002 | pstats->mstats.mld_leaves[dir]++; | |
5003 | break; | |
5004 | } | |
5005 | break; | |
5006 | #endif /* CONFIG_IPV6 */ | |
5007 | } | |
5008 | u64_stats_update_end(&pstats->syncp); | |
5009 | } | |
5010 | ||
adc47037 NA |
5011 | void br_multicast_count(struct net_bridge *br, |
5012 | const struct net_bridge_port *p, | |
a65056ec | 5013 | const struct sk_buff *skb, u8 type, u8 dir) |
1080ab95 NA |
5014 | { |
5015 | struct bridge_mcast_stats __percpu *stats; | |
5016 | ||
5017 | /* if multicast_disabled is true then igmp type can't be set */ | |
675779ad | 5018 | if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) |
1080ab95 NA |
5019 | return; |
5020 | ||
5021 | if (p) | |
5022 | stats = p->mcast_stats; | |
5023 | else | |
5024 | stats = br->mcast_stats; | |
5025 | if (WARN_ON(!stats)) | |
5026 | return; | |
5027 | ||
a65056ec | 5028 | br_mcast_stats_add(stats, skb, type, dir); |
1080ab95 NA |
5029 | } |
5030 | ||
5031 | int br_multicast_init_stats(struct net_bridge *br) | |
5032 | { | |
5033 | br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats); | |
5034 | if (!br->mcast_stats) | |
5035 | return -ENOMEM; | |
5036 | ||
5037 | return 0; | |
5038 | } | |
5039 | ||
b6fe0440 IS |
5040 | void br_multicast_uninit_stats(struct net_bridge *br) |
5041 | { | |
5042 | free_percpu(br->mcast_stats); | |
5043 | } | |
5044 | ||
b3b6a84c AB |
5045 | /* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */ |
5046 | static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src) | |
1080ab95 NA |
5047 | { |
5048 | dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX]; | |
5049 | dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX]; | |
5050 | } | |
5051 | ||
5052 | void br_multicast_get_stats(const struct net_bridge *br, | |
5053 | const struct net_bridge_port *p, | |
5054 | struct br_mcast_stats *dest) | |
5055 | { | |
5056 | struct bridge_mcast_stats __percpu *stats; | |
5057 | struct br_mcast_stats tdst; | |
5058 | int i; | |
5059 | ||
5060 | memset(dest, 0, sizeof(*dest)); | |
5061 | if (p) | |
5062 | stats = p->mcast_stats; | |
5063 | else | |
5064 | stats = br->mcast_stats; | |
5065 | if (WARN_ON(!stats)) | |
5066 | return; | |
5067 | ||
5068 | memset(&tdst, 0, sizeof(tdst)); | |
5069 | for_each_possible_cpu(i) { | |
5070 | struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i); | |
5071 | struct br_mcast_stats temp; | |
5072 | unsigned int start; | |
5073 | ||
5074 | do { | |
d120d1a6 | 5075 | start = u64_stats_fetch_begin(&cpu_stats->syncp); |
1080ab95 | 5076 | memcpy(&temp, &cpu_stats->mstats, sizeof(temp)); |
d120d1a6 | 5077 | } while (u64_stats_fetch_retry(&cpu_stats->syncp, start)); |
1080ab95 | 5078 | |
a65056ec NA |
5079 | mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries); |
5080 | mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries); | |
5081 | mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries); | |
1080ab95 NA |
5082 | mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves); |
5083 | mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports); | |
5084 | mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports); | |
5085 | mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports); | |
5086 | tdst.igmp_parse_errors += temp.igmp_parse_errors; | |
5087 | ||
a65056ec NA |
5088 | mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries); |
5089 | mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries); | |
1080ab95 NA |
5090 | mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves); |
5091 | mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports); | |
5092 | mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports); | |
5093 | tdst.mld_parse_errors += temp.mld_parse_errors; | |
5094 | } | |
5095 | memcpy(dest, &tdst, sizeof(*dest)); | |
5096 | } | |
19e3a9c9 NA |
5097 | |
5098 | int br_mdb_hash_init(struct net_bridge *br) | |
5099 | { | |
085b53c8 NA |
5100 | int err; |
5101 | ||
5102 | err = rhashtable_init(&br->sg_port_tbl, &br_sg_port_rht_params); | |
5103 | if (err) | |
5104 | return err; | |
5105 | ||
5106 | err = rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params); | |
5107 | if (err) { | |
5108 | rhashtable_destroy(&br->sg_port_tbl); | |
5109 | return err; | |
5110 | } | |
5111 | ||
5112 | return 0; | |
19e3a9c9 NA |
5113 | } |
5114 | ||
5115 | void br_mdb_hash_fini(struct net_bridge *br) | |
5116 | { | |
085b53c8 | 5117 | rhashtable_destroy(&br->sg_port_tbl); |
19e3a9c9 NA |
5118 | rhashtable_destroy(&br->mdb_hash_tbl); |
5119 | } |