Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ee07c6e7 CW |
2 | #include <linux/err.h> |
3 | #include <linux/igmp.h> | |
4 | #include <linux/kernel.h> | |
5 | #include <linux/netdevice.h> | |
6 | #include <linux/rculist.h> | |
7 | #include <linux/skbuff.h> | |
cfd56754 | 8 | #include <linux/if_ether.h> |
ee07c6e7 CW |
9 | #include <net/ip.h> |
10 | #include <net/netlink.h> | |
f1fecb1d | 11 | #include <net/switchdev.h> |
ee07c6e7 CW |
12 | #if IS_ENABLED(CONFIG_IPV6) |
13 | #include <net/ipv6.h> | |
3c3769e6 | 14 | #include <net/addrconf.h> |
ee07c6e7 CW |
15 | #endif |
16 | ||
17 | #include "br_private.h" | |
18 | ||
19 | static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb, | |
20 | struct net_device *dev) | |
21 | { | |
22 | struct net_bridge *br = netdev_priv(dev); | |
23 | struct net_bridge_port *p; | |
59f78f9f | 24 | struct nlattr *nest, *port_nest; |
ee07c6e7 CW |
25 | |
26 | if (!br->multicast_router || hlist_empty(&br->router_list)) | |
27 | return 0; | |
28 | ||
ae0be8de | 29 | nest = nla_nest_start_noflag(skb, MDBA_ROUTER); |
ee07c6e7 CW |
30 | if (nest == NULL) |
31 | return -EMSGSIZE; | |
32 | ||
b67bfe0d | 33 | hlist_for_each_entry_rcu(p, &br->router_list, rlist) { |
59f78f9f NA |
34 | if (!p) |
35 | continue; | |
ae0be8de | 36 | port_nest = nla_nest_start_noflag(skb, MDBA_ROUTER_PORT); |
59f78f9f | 37 | if (!port_nest) |
ee07c6e7 | 38 | goto fail; |
59f78f9f NA |
39 | if (nla_put_nohdr(skb, sizeof(u32), &p->dev->ifindex) || |
40 | nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER, | |
41 | br_timer_value(&p->multicast_router_timer)) || | |
42 | nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE, | |
43 | p->multicast_router)) { | |
44 | nla_nest_cancel(skb, port_nest); | |
45 | goto fail; | |
46 | } | |
47 | nla_nest_end(skb, port_nest); | |
ee07c6e7 CW |
48 | } |
49 | ||
50 | nla_nest_end(skb, nest); | |
51 | return 0; | |
52 | fail: | |
53 | nla_nest_cancel(skb, nest); | |
54 | return -EMSGSIZE; | |
55 | } | |
56 | ||
9d06b6d8 ER |
57 | static void __mdb_entry_fill_flags(struct br_mdb_entry *e, unsigned char flags) |
58 | { | |
59 | e->state = flags & MDB_PG_FLAGS_PERMANENT; | |
60 | e->flags = 0; | |
61 | if (flags & MDB_PG_FLAGS_OFFLOAD) | |
62 | e->flags |= MDB_FLAGS_OFFLOAD; | |
3247b272 NA |
63 | if (flags & MDB_PG_FLAGS_FAST_LEAVE) |
64 | e->flags |= MDB_FLAGS_FAST_LEAVE; | |
9d06b6d8 ER |
65 | } |
66 | ||
6dd684c0 ER |
67 | static void __mdb_entry_to_br_ip(struct br_mdb_entry *entry, struct br_ip *ip) |
68 | { | |
69 | memset(ip, 0, sizeof(struct br_ip)); | |
70 | ip->vid = entry->vid; | |
71 | ip->proto = entry->addr.proto; | |
72 | if (ip->proto == htons(ETH_P_IP)) | |
73 | ip->u.ip4 = entry->addr.u.ip4; | |
74 | #if IS_ENABLED(CONFIG_IPV6) | |
75 | else | |
76 | ip->u.ip6 = entry->addr.u.ip6; | |
77 | #endif | |
78 | } | |
79 | ||
5205e919 NA |
80 | static int __mdb_fill_srcs(struct sk_buff *skb, |
81 | struct net_bridge_port_group *p) | |
82 | { | |
83 | struct net_bridge_group_src *ent; | |
84 | struct nlattr *nest, *nest_ent; | |
85 | ||
86 | if (hlist_empty(&p->src_list)) | |
87 | return 0; | |
88 | ||
89 | nest = nla_nest_start(skb, MDBA_MDB_EATTR_SRC_LIST); | |
90 | if (!nest) | |
91 | return -EMSGSIZE; | |
92 | ||
93 | hlist_for_each_entry_rcu(ent, &p->src_list, node, | |
94 | lockdep_is_held(&p->port->br->multicast_lock)) { | |
95 | nest_ent = nla_nest_start(skb, MDBA_MDB_SRCLIST_ENTRY); | |
96 | if (!nest_ent) | |
97 | goto out_cancel_err; | |
98 | switch (ent->addr.proto) { | |
99 | case htons(ETH_P_IP): | |
100 | if (nla_put_in_addr(skb, MDBA_MDB_SRCATTR_ADDRESS, | |
101 | ent->addr.u.ip4)) { | |
102 | nla_nest_cancel(skb, nest_ent); | |
103 | goto out_cancel_err; | |
104 | } | |
105 | break; | |
106 | #if IS_ENABLED(CONFIG_IPV6) | |
107 | case htons(ETH_P_IPV6): | |
108 | if (nla_put_in6_addr(skb, MDBA_MDB_SRCATTR_ADDRESS, | |
109 | &ent->addr.u.ip6)) { | |
110 | nla_nest_cancel(skb, nest_ent); | |
111 | goto out_cancel_err; | |
112 | } | |
113 | break; | |
114 | #endif | |
115 | default: | |
116 | nla_nest_cancel(skb, nest_ent); | |
117 | continue; | |
118 | } | |
119 | if (nla_put_u32(skb, MDBA_MDB_SRCATTR_TIMER, | |
120 | br_timer_value(&ent->timer))) { | |
121 | nla_nest_cancel(skb, nest_ent); | |
122 | goto out_cancel_err; | |
123 | } | |
124 | nla_nest_end(skb, nest_ent); | |
125 | } | |
126 | ||
127 | nla_nest_end(skb, nest); | |
128 | ||
129 | return 0; | |
130 | ||
131 | out_cancel_err: | |
132 | nla_nest_cancel(skb, nest); | |
133 | return -EMSGSIZE; | |
134 | } | |
135 | ||
6545916e | 136 | static int __mdb_fill_info(struct sk_buff *skb, |
e77b0c84 | 137 | struct net_bridge_mdb_entry *mp, |
6545916e NA |
138 | struct net_bridge_port_group *p) |
139 | { | |
5205e919 | 140 | bool dump_srcs_mode = false; |
e77b0c84 | 141 | struct timer_list *mtimer; |
6545916e NA |
142 | struct nlattr *nest_ent; |
143 | struct br_mdb_entry e; | |
e77b0c84 NA |
144 | u8 flags = 0; |
145 | int ifindex; | |
6545916e NA |
146 | |
147 | memset(&e, 0, sizeof(e)); | |
e77b0c84 NA |
148 | if (p) { |
149 | ifindex = p->port->dev->ifindex; | |
150 | mtimer = &p->timer; | |
151 | flags = p->flags; | |
152 | } else { | |
153 | ifindex = mp->br->dev->ifindex; | |
154 | mtimer = &mp->timer; | |
155 | } | |
156 | ||
157 | __mdb_entry_fill_flags(&e, flags); | |
158 | e.ifindex = ifindex; | |
159 | e.vid = mp->addr.vid; | |
160 | if (mp->addr.proto == htons(ETH_P_IP)) | |
161 | e.addr.u.ip4 = mp->addr.u.ip4; | |
6545916e | 162 | #if IS_ENABLED(CONFIG_IPV6) |
e77b0c84 NA |
163 | if (mp->addr.proto == htons(ETH_P_IPV6)) |
164 | e.addr.u.ip6 = mp->addr.u.ip6; | |
6545916e | 165 | #endif |
e77b0c84 | 166 | e.addr.proto = mp->addr.proto; |
6545916e NA |
167 | nest_ent = nla_nest_start_noflag(skb, |
168 | MDBA_MDB_ENTRY_INFO); | |
169 | if (!nest_ent) | |
170 | return -EMSGSIZE; | |
171 | ||
172 | if (nla_put_nohdr(skb, sizeof(e), &e) || | |
173 | nla_put_u32(skb, | |
174 | MDBA_MDB_EATTR_TIMER, | |
e77b0c84 | 175 | br_timer_value(mtimer))) { |
6545916e NA |
176 | nla_nest_cancel(skb, nest_ent); |
177 | return -EMSGSIZE; | |
178 | } | |
5205e919 NA |
179 | switch (mp->addr.proto) { |
180 | case htons(ETH_P_IP): | |
181 | dump_srcs_mode = !!(p && mp->br->multicast_igmp_version == 3); | |
182 | break; | |
183 | #if IS_ENABLED(CONFIG_IPV6) | |
184 | case htons(ETH_P_IPV6): | |
185 | dump_srcs_mode = !!(p && mp->br->multicast_mld_version == 2); | |
186 | break; | |
187 | #endif | |
188 | } | |
189 | if (dump_srcs_mode && | |
190 | (__mdb_fill_srcs(skb, p) || | |
191 | nla_put_u8(skb, MDBA_MDB_EATTR_GROUP_MODE, p->filter_mode))) { | |
192 | nla_nest_cancel(skb, nest_ent); | |
193 | return -EMSGSIZE; | |
194 | } | |
195 | ||
6545916e NA |
196 | nla_nest_end(skb, nest_ent); |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
ee07c6e7 CW |
201 | static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb, |
202 | struct net_device *dev) | |
203 | { | |
5205e919 | 204 | int idx = 0, s_idx = cb->args[1], err = 0, pidx = 0, s_pidx = cb->args[2]; |
ee07c6e7 | 205 | struct net_bridge *br = netdev_priv(dev); |
19e3a9c9 | 206 | struct net_bridge_mdb_entry *mp; |
ee07c6e7 | 207 | struct nlattr *nest, *nest2; |
ee07c6e7 | 208 | |
13cefad2 | 209 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
ee07c6e7 CW |
210 | return 0; |
211 | ||
ae0be8de | 212 | nest = nla_nest_start_noflag(skb, MDBA_MDB); |
ee07c6e7 CW |
213 | if (nest == NULL) |
214 | return -EMSGSIZE; | |
215 | ||
19e3a9c9 | 216 | hlist_for_each_entry_rcu(mp, &br->mdb_list, mdb_node) { |
762a3d89 | 217 | struct net_bridge_port_group *p; |
218 | struct net_bridge_port_group __rcu **pp; | |
ee07c6e7 | 219 | |
19e3a9c9 NA |
220 | if (idx < s_idx) |
221 | goto skip; | |
ee07c6e7 | 222 | |
ae0be8de | 223 | nest2 = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY); |
19e3a9c9 NA |
224 | if (!nest2) { |
225 | err = -EMSGSIZE; | |
226 | break; | |
227 | } | |
ee07c6e7 | 228 | |
5205e919 | 229 | if (!s_pidx && mp->host_joined) { |
e77b0c84 NA |
230 | err = __mdb_fill_info(skb, mp, NULL); |
231 | if (err) { | |
232 | nla_nest_cancel(skb, nest2); | |
233 | break; | |
234 | } | |
235 | } | |
236 | ||
19e3a9c9 NA |
237 | for (pp = &mp->ports; (p = rcu_dereference(*pp)) != NULL; |
238 | pp = &p->next) { | |
6545916e | 239 | if (!p->port) |
19e3a9c9 | 240 | continue; |
5205e919 NA |
241 | if (pidx < s_pidx) |
242 | goto skip_pg; | |
19e3a9c9 | 243 | |
e77b0c84 | 244 | err = __mdb_fill_info(skb, mp, p); |
6545916e | 245 | if (err) { |
12913f74 | 246 | nla_nest_end(skb, nest2); |
19e3a9c9 NA |
247 | goto out; |
248 | } | |
5205e919 NA |
249 | skip_pg: |
250 | pidx++; | |
ee07c6e7 | 251 | } |
5205e919 NA |
252 | pidx = 0; |
253 | s_pidx = 0; | |
19e3a9c9 NA |
254 | nla_nest_end(skb, nest2); |
255 | skip: | |
256 | idx++; | |
ee07c6e7 CW |
257 | } |
258 | ||
259 | out: | |
260 | cb->args[1] = idx; | |
5205e919 | 261 | cb->args[2] = pidx; |
ee07c6e7 CW |
262 | nla_nest_end(skb, nest); |
263 | return err; | |
264 | } | |
265 | ||
c77b9364 DA |
266 | static int br_mdb_valid_dump_req(const struct nlmsghdr *nlh, |
267 | struct netlink_ext_ack *extack) | |
268 | { | |
269 | struct br_port_msg *bpm; | |
270 | ||
271 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*bpm))) { | |
272 | NL_SET_ERR_MSG_MOD(extack, "Invalid header for mdb dump request"); | |
273 | return -EINVAL; | |
274 | } | |
275 | ||
276 | bpm = nlmsg_data(nlh); | |
277 | if (bpm->ifindex) { | |
278 | NL_SET_ERR_MSG_MOD(extack, "Filtering by device index is not supported for mdb dump request"); | |
279 | return -EINVAL; | |
280 | } | |
281 | if (nlmsg_attrlen(nlh, sizeof(*bpm))) { | |
282 | NL_SET_ERR_MSG(extack, "Invalid data after header in mdb dump request"); | |
283 | return -EINVAL; | |
284 | } | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
ee07c6e7 CW |
289 | static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb) |
290 | { | |
291 | struct net_device *dev; | |
292 | struct net *net = sock_net(skb->sk); | |
293 | struct nlmsghdr *nlh = NULL; | |
294 | int idx = 0, s_idx; | |
295 | ||
c77b9364 DA |
296 | if (cb->strict_check) { |
297 | int err = br_mdb_valid_dump_req(cb->nlh, cb->extack); | |
298 | ||
299 | if (err < 0) | |
300 | return err; | |
301 | } | |
302 | ||
ee07c6e7 CW |
303 | s_idx = cb->args[0]; |
304 | ||
305 | rcu_read_lock(); | |
306 | ||
19e3a9c9 | 307 | cb->seq = net->dev_base_seq; |
ee07c6e7 CW |
308 | |
309 | for_each_netdev_rcu(net, dev) { | |
310 | if (dev->priv_flags & IFF_EBRIDGE) { | |
311 | struct br_port_msg *bpm; | |
312 | ||
313 | if (idx < s_idx) | |
314 | goto skip; | |
315 | ||
316 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
317 | cb->nlh->nlmsg_seq, RTM_GETMDB, | |
318 | sizeof(*bpm), NLM_F_MULTI); | |
319 | if (nlh == NULL) | |
320 | break; | |
321 | ||
322 | bpm = nlmsg_data(nlh); | |
c085c499 | 323 | memset(bpm, 0, sizeof(*bpm)); |
ee07c6e7 CW |
324 | bpm->ifindex = dev->ifindex; |
325 | if (br_mdb_fill_info(skb, cb, dev) < 0) | |
326 | goto out; | |
327 | if (br_rports_fill_info(skb, cb, dev) < 0) | |
328 | goto out; | |
329 | ||
330 | cb->args[1] = 0; | |
331 | nlmsg_end(skb, nlh); | |
332 | skip: | |
333 | idx++; | |
334 | } | |
335 | } | |
336 | ||
337 | out: | |
338 | if (nlh) | |
339 | nlmsg_end(skb, nlh); | |
340 | rcu_read_unlock(); | |
341 | cb->args[0] = idx; | |
342 | return skb->len; | |
343 | } | |
344 | ||
37a393bc CW |
345 | static int nlmsg_populate_mdb_fill(struct sk_buff *skb, |
346 | struct net_device *dev, | |
81f19838 NA |
347 | struct net_bridge_mdb_entry *mp, |
348 | struct net_bridge_port_group *pg, | |
349 | int type) | |
37a393bc CW |
350 | { |
351 | struct nlmsghdr *nlh; | |
352 | struct br_port_msg *bpm; | |
353 | struct nlattr *nest, *nest2; | |
354 | ||
81f19838 | 355 | nlh = nlmsg_put(skb, 0, 0, type, sizeof(*bpm), 0); |
37a393bc CW |
356 | if (!nlh) |
357 | return -EMSGSIZE; | |
358 | ||
359 | bpm = nlmsg_data(nlh); | |
c085c499 | 360 | memset(bpm, 0, sizeof(*bpm)); |
37a393bc CW |
361 | bpm->family = AF_BRIDGE; |
362 | bpm->ifindex = dev->ifindex; | |
ae0be8de | 363 | nest = nla_nest_start_noflag(skb, MDBA_MDB); |
37a393bc CW |
364 | if (nest == NULL) |
365 | goto cancel; | |
ae0be8de | 366 | nest2 = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY); |
37a393bc CW |
367 | if (nest2 == NULL) |
368 | goto end; | |
369 | ||
81f19838 | 370 | if (__mdb_fill_info(skb, mp, pg)) |
37a393bc CW |
371 | goto end; |
372 | ||
373 | nla_nest_end(skb, nest2); | |
374 | nla_nest_end(skb, nest); | |
053c095a JB |
375 | nlmsg_end(skb, nlh); |
376 | return 0; | |
37a393bc CW |
377 | |
378 | end: | |
379 | nla_nest_end(skb, nest); | |
380 | cancel: | |
381 | nlmsg_cancel(skb, nlh); | |
382 | return -EMSGSIZE; | |
383 | } | |
384 | ||
81f19838 | 385 | static size_t rtnl_mdb_nlmsg_size(struct net_bridge_port_group *pg) |
37a393bc | 386 | { |
81f19838 NA |
387 | size_t nlmsg_size = NLMSG_ALIGN(sizeof(struct br_port_msg)) + |
388 | nla_total_size(sizeof(struct br_mdb_entry)) + | |
389 | nla_total_size(sizeof(u32)); | |
390 | struct net_bridge_group_src *ent; | |
391 | size_t addr_size = 0; | |
392 | ||
393 | if (!pg) | |
394 | goto out; | |
395 | ||
396 | switch (pg->addr.proto) { | |
397 | case htons(ETH_P_IP): | |
398 | if (pg->port->br->multicast_igmp_version == 2) | |
399 | goto out; | |
400 | addr_size = sizeof(__be32); | |
401 | break; | |
402 | #if IS_ENABLED(CONFIG_IPV6) | |
403 | case htons(ETH_P_IPV6): | |
404 | if (pg->port->br->multicast_mld_version == 1) | |
405 | goto out; | |
406 | addr_size = sizeof(struct in6_addr); | |
407 | break; | |
408 | #endif | |
409 | } | |
410 | ||
411 | /* MDBA_MDB_EATTR_GROUP_MODE */ | |
412 | nlmsg_size += nla_total_size(sizeof(u8)); | |
413 | ||
414 | /* MDBA_MDB_EATTR_SRC_LIST nested attr */ | |
415 | if (!hlist_empty(&pg->src_list)) | |
416 | nlmsg_size += nla_total_size(0); | |
417 | ||
418 | hlist_for_each_entry(ent, &pg->src_list, node) { | |
419 | /* MDBA_MDB_SRCLIST_ENTRY nested attr + | |
420 | * MDBA_MDB_SRCATTR_ADDRESS + MDBA_MDB_SRCATTR_TIMER | |
421 | */ | |
422 | nlmsg_size += nla_total_size(0) + | |
423 | nla_total_size(addr_size) + | |
424 | nla_total_size(sizeof(u32)); | |
425 | } | |
426 | out: | |
427 | return nlmsg_size; | |
37a393bc CW |
428 | } |
429 | ||
45ebcce5 ER |
430 | struct br_mdb_complete_info { |
431 | struct net_bridge_port *port; | |
432 | struct br_ip ip; | |
433 | }; | |
434 | ||
435 | static void br_mdb_complete(struct net_device *dev, int err, void *priv) | |
37a393bc | 436 | { |
45ebcce5 ER |
437 | struct br_mdb_complete_info *data = priv; |
438 | struct net_bridge_port_group __rcu **pp; | |
439 | struct net_bridge_port_group *p; | |
45ebcce5 ER |
440 | struct net_bridge_mdb_entry *mp; |
441 | struct net_bridge_port *port = data->port; | |
442 | struct net_bridge *br = port->br; | |
443 | ||
444 | if (err) | |
445 | goto err; | |
446 | ||
447 | spin_lock_bh(&br->multicast_lock); | |
19e3a9c9 | 448 | mp = br_mdb_ip_get(br, &data->ip); |
45ebcce5 ER |
449 | if (!mp) |
450 | goto out; | |
451 | for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL; | |
452 | pp = &p->next) { | |
453 | if (p->port != port) | |
454 | continue; | |
455 | p->flags |= MDB_PG_FLAGS_OFFLOAD; | |
456 | } | |
457 | out: | |
458 | spin_unlock_bh(&br->multicast_lock); | |
459 | err: | |
460 | kfree(priv); | |
461 | } | |
462 | ||
47d5b6db AL |
463 | static void br_mdb_switchdev_host_port(struct net_device *dev, |
464 | struct net_device *lower_dev, | |
81f19838 NA |
465 | struct net_bridge_mdb_entry *mp, |
466 | int type) | |
47d5b6db AL |
467 | { |
468 | struct switchdev_obj_port_mdb mdb = { | |
469 | .obj = { | |
470 | .id = SWITCHDEV_OBJ_ID_HOST_MDB, | |
471 | .flags = SWITCHDEV_F_DEFER, | |
472 | }, | |
81f19838 | 473 | .vid = mp->addr.vid, |
47d5b6db AL |
474 | }; |
475 | ||
81f19838 NA |
476 | if (mp->addr.proto == htons(ETH_P_IP)) |
477 | ip_eth_mc_map(mp->addr.u.ip4, mdb.addr); | |
47d5b6db AL |
478 | #if IS_ENABLED(CONFIG_IPV6) |
479 | else | |
81f19838 | 480 | ipv6_eth_mc_map(&mp->addr.u.ip6, mdb.addr); |
47d5b6db AL |
481 | #endif |
482 | ||
483 | mdb.obj.orig_dev = dev; | |
484 | switch (type) { | |
485 | case RTM_NEWMDB: | |
69b7320e | 486 | switchdev_port_obj_add(lower_dev, &mdb.obj, NULL); |
47d5b6db AL |
487 | break; |
488 | case RTM_DELMDB: | |
489 | switchdev_port_obj_del(lower_dev, &mdb.obj); | |
490 | break; | |
491 | } | |
492 | } | |
493 | ||
494 | static void br_mdb_switchdev_host(struct net_device *dev, | |
81f19838 | 495 | struct net_bridge_mdb_entry *mp, int type) |
47d5b6db AL |
496 | { |
497 | struct net_device *lower_dev; | |
498 | struct list_head *iter; | |
499 | ||
500 | netdev_for_each_lower_dev(dev, lower_dev, iter) | |
81f19838 | 501 | br_mdb_switchdev_host_port(dev, lower_dev, mp, type); |
47d5b6db AL |
502 | } |
503 | ||
81f19838 NA |
504 | void br_mdb_notify(struct net_device *dev, |
505 | struct net_bridge_mdb_entry *mp, | |
506 | struct net_bridge_port_group *pg, | |
507 | int type) | |
45ebcce5 ER |
508 | { |
509 | struct br_mdb_complete_info *complete_info; | |
f1fecb1d ER |
510 | struct switchdev_obj_port_mdb mdb = { |
511 | .obj = { | |
512 | .id = SWITCHDEV_OBJ_ID_PORT_MDB, | |
513 | .flags = SWITCHDEV_F_DEFER, | |
514 | }, | |
81f19838 | 515 | .vid = mp->addr.vid, |
f1fecb1d | 516 | }; |
37a393bc CW |
517 | struct net *net = dev_net(dev); |
518 | struct sk_buff *skb; | |
519 | int err = -ENOBUFS; | |
520 | ||
81f19838 NA |
521 | if (pg) { |
522 | if (mp->addr.proto == htons(ETH_P_IP)) | |
523 | ip_eth_mc_map(mp->addr.u.ip4, mdb.addr); | |
f1fecb1d | 524 | #if IS_ENABLED(CONFIG_IPV6) |
81f19838 NA |
525 | else |
526 | ipv6_eth_mc_map(&mp->addr.u.ip6, mdb.addr); | |
f1fecb1d | 527 | #endif |
81f19838 NA |
528 | mdb.obj.orig_dev = pg->port->dev; |
529 | switch (type) { | |
530 | case RTM_NEWMDB: | |
531 | complete_info = kmalloc(sizeof(*complete_info), GFP_ATOMIC); | |
532 | if (!complete_info) | |
533 | break; | |
534 | complete_info->port = pg->port; | |
535 | complete_info->ip = mp->addr; | |
45ebcce5 ER |
536 | mdb.obj.complete_priv = complete_info; |
537 | mdb.obj.complete = br_mdb_complete; | |
81f19838 | 538 | if (switchdev_port_obj_add(pg->port->dev, &mdb.obj, NULL)) |
1bfb1596 | 539 | kfree(complete_info); |
81f19838 NA |
540 | break; |
541 | case RTM_DELMDB: | |
542 | switchdev_port_obj_del(pg->port->dev, &mdb.obj); | |
543 | break; | |
45ebcce5 | 544 | } |
81f19838 NA |
545 | } else { |
546 | br_mdb_switchdev_host(dev, mp, type); | |
9e8430f8 | 547 | } |
f1fecb1d | 548 | |
81f19838 | 549 | skb = nlmsg_new(rtnl_mdb_nlmsg_size(pg), GFP_ATOMIC); |
37a393bc CW |
550 | if (!skb) |
551 | goto errout; | |
552 | ||
81f19838 | 553 | err = nlmsg_populate_mdb_fill(skb, dev, mp, pg, type); |
37a393bc CW |
554 | if (err < 0) { |
555 | kfree_skb(skb); | |
556 | goto errout; | |
557 | } | |
558 | ||
559 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
560 | return; | |
561 | errout: | |
562 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
563 | } | |
564 | ||
949f1e39 SA |
565 | static int nlmsg_populate_rtr_fill(struct sk_buff *skb, |
566 | struct net_device *dev, | |
567 | int ifindex, u32 pid, | |
568 | u32 seq, int type, unsigned int flags) | |
569 | { | |
570 | struct br_port_msg *bpm; | |
571 | struct nlmsghdr *nlh; | |
572 | struct nlattr *nest; | |
573 | ||
94a72b3f | 574 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0); |
949f1e39 SA |
575 | if (!nlh) |
576 | return -EMSGSIZE; | |
577 | ||
578 | bpm = nlmsg_data(nlh); | |
579 | memset(bpm, 0, sizeof(*bpm)); | |
580 | bpm->family = AF_BRIDGE; | |
581 | bpm->ifindex = dev->ifindex; | |
ae0be8de | 582 | nest = nla_nest_start_noflag(skb, MDBA_ROUTER); |
949f1e39 SA |
583 | if (!nest) |
584 | goto cancel; | |
585 | ||
586 | if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex)) | |
587 | goto end; | |
588 | ||
589 | nla_nest_end(skb, nest); | |
590 | nlmsg_end(skb, nlh); | |
591 | return 0; | |
592 | ||
593 | end: | |
594 | nla_nest_end(skb, nest); | |
595 | cancel: | |
596 | nlmsg_cancel(skb, nlh); | |
597 | return -EMSGSIZE; | |
598 | } | |
599 | ||
600 | static inline size_t rtnl_rtr_nlmsg_size(void) | |
601 | { | |
602 | return NLMSG_ALIGN(sizeof(struct br_port_msg)) | |
603 | + nla_total_size(sizeof(__u32)); | |
604 | } | |
605 | ||
606 | void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, | |
607 | int type) | |
608 | { | |
609 | struct net *net = dev_net(dev); | |
610 | struct sk_buff *skb; | |
611 | int err = -ENOBUFS; | |
612 | int ifindex; | |
613 | ||
614 | ifindex = port ? port->dev->ifindex : 0; | |
615 | skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC); | |
616 | if (!skb) | |
617 | goto errout; | |
618 | ||
619 | err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF); | |
620 | if (err < 0) { | |
621 | kfree_skb(skb); | |
622 | goto errout; | |
623 | } | |
624 | ||
625 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
626 | return; | |
627 | ||
628 | errout: | |
629 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
630 | } | |
631 | ||
2ac95dfe NA |
632 | static bool is_valid_mdb_entry(struct br_mdb_entry *entry, |
633 | struct netlink_ext_ack *extack) | |
cfd56754 | 634 | { |
2ac95dfe NA |
635 | if (entry->ifindex == 0) { |
636 | NL_SET_ERR_MSG_MOD(extack, "Zero entry ifindex is not allowed"); | |
cfd56754 | 637 | return false; |
2ac95dfe | 638 | } |
cfd56754 CW |
639 | |
640 | if (entry->addr.proto == htons(ETH_P_IP)) { | |
2ac95dfe NA |
641 | if (!ipv4_is_multicast(entry->addr.u.ip4)) { |
642 | NL_SET_ERR_MSG_MOD(extack, "IPv4 entry group address is not multicast"); | |
cfd56754 | 643 | return false; |
2ac95dfe NA |
644 | } |
645 | if (ipv4_is_local_multicast(entry->addr.u.ip4)) { | |
646 | NL_SET_ERR_MSG_MOD(extack, "IPv4 entry group address is local multicast"); | |
cfd56754 | 647 | return false; |
2ac95dfe | 648 | } |
cfd56754 CW |
649 | #if IS_ENABLED(CONFIG_IPV6) |
650 | } else if (entry->addr.proto == htons(ETH_P_IPV6)) { | |
2ac95dfe NA |
651 | if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6)) { |
652 | NL_SET_ERR_MSG_MOD(extack, "IPv6 entry group address is link-local all nodes"); | |
cfd56754 | 653 | return false; |
2ac95dfe | 654 | } |
cfd56754 | 655 | #endif |
2ac95dfe NA |
656 | } else { |
657 | NL_SET_ERR_MSG_MOD(extack, "Unknown entry protocol"); | |
cfd56754 | 658 | return false; |
2ac95dfe NA |
659 | } |
660 | ||
661 | if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) { | |
662 | NL_SET_ERR_MSG_MOD(extack, "Unknown entry state"); | |
ccb1c31a | 663 | return false; |
2ac95dfe NA |
664 | } |
665 | if (entry->vid >= VLAN_VID_MASK) { | |
666 | NL_SET_ERR_MSG_MOD(extack, "Invalid entry VLAN id"); | |
74fe61f1 | 667 | return false; |
2ac95dfe | 668 | } |
cfd56754 CW |
669 | |
670 | return true; | |
671 | } | |
672 | ||
673 | static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh, | |
2ac95dfe NA |
674 | struct net_device **pdev, struct br_mdb_entry **pentry, |
675 | struct netlink_ext_ack *extack) | |
cfd56754 CW |
676 | { |
677 | struct net *net = sock_net(skb->sk); | |
678 | struct br_mdb_entry *entry; | |
679 | struct br_port_msg *bpm; | |
680 | struct nlattr *tb[MDBA_SET_ENTRY_MAX+1]; | |
681 | struct net_device *dev; | |
682 | int err; | |
683 | ||
8cb08174 JB |
684 | err = nlmsg_parse_deprecated(nlh, sizeof(*bpm), tb, |
685 | MDBA_SET_ENTRY_MAX, NULL, NULL); | |
cfd56754 CW |
686 | if (err < 0) |
687 | return err; | |
688 | ||
689 | bpm = nlmsg_data(nlh); | |
690 | if (bpm->ifindex == 0) { | |
2ac95dfe | 691 | NL_SET_ERR_MSG_MOD(extack, "Invalid bridge ifindex"); |
cfd56754 CW |
692 | return -EINVAL; |
693 | } | |
694 | ||
695 | dev = __dev_get_by_index(net, bpm->ifindex); | |
696 | if (dev == NULL) { | |
2ac95dfe | 697 | NL_SET_ERR_MSG_MOD(extack, "Bridge device doesn't exist"); |
cfd56754 CW |
698 | return -ENODEV; |
699 | } | |
700 | ||
701 | if (!(dev->priv_flags & IFF_EBRIDGE)) { | |
2ac95dfe | 702 | NL_SET_ERR_MSG_MOD(extack, "Device is not a bridge"); |
cfd56754 CW |
703 | return -EOPNOTSUPP; |
704 | } | |
705 | ||
706 | *pdev = dev; | |
707 | ||
2ac95dfe NA |
708 | if (!tb[MDBA_SET_ENTRY]) { |
709 | NL_SET_ERR_MSG_MOD(extack, "Missing MDBA_SET_ENTRY attribute"); | |
cfd56754 CW |
710 | return -EINVAL; |
711 | } | |
2ac95dfe NA |
712 | if (nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) { |
713 | NL_SET_ERR_MSG_MOD(extack, "Invalid MDBA_SET_ENTRY attribute length"); | |
cfd56754 CW |
714 | return -EINVAL; |
715 | } | |
716 | ||
2ac95dfe NA |
717 | entry = nla_data(tb[MDBA_SET_ENTRY]); |
718 | if (!is_valid_mdb_entry(entry, extack)) | |
719 | return -EINVAL; | |
cfd56754 | 720 | *pentry = entry; |
2ac95dfe | 721 | |
cfd56754 CW |
722 | return 0; |
723 | } | |
724 | ||
725 | static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port, | |
79abc875 | 726 | struct br_ip *group, struct br_mdb_entry *entry) |
cfd56754 CW |
727 | { |
728 | struct net_bridge_mdb_entry *mp; | |
729 | struct net_bridge_port_group *p; | |
730 | struct net_bridge_port_group __rcu **pp; | |
f7e2965d | 731 | unsigned long now = jiffies; |
cfd56754 CW |
732 | int err; |
733 | ||
19e3a9c9 | 734 | mp = br_mdb_ip_get(br, group); |
cfd56754 | 735 | if (!mp) { |
19e3a9c9 | 736 | mp = br_multicast_new_group(br, group); |
56bb7fd9 AB |
737 | err = PTR_ERR_OR_ZERO(mp); |
738 | if (err) | |
cfd56754 CW |
739 | return err; |
740 | } | |
741 | ||
1bc844ee NA |
742 | /* host join */ |
743 | if (!port) { | |
744 | /* don't allow any flags for host-joined groups */ | |
79abc875 | 745 | if (entry->state) |
1bc844ee NA |
746 | return -EINVAL; |
747 | if (mp->host_joined) | |
748 | return -EEXIST; | |
749 | ||
750 | br_multicast_host_join(mp, false); | |
81f19838 | 751 | br_mdb_notify(br->dev, mp, NULL, RTM_NEWMDB); |
1bc844ee NA |
752 | |
753 | return 0; | |
754 | } | |
755 | ||
cfd56754 CW |
756 | for (pp = &mp->ports; |
757 | (p = mlock_dereference(*pp, br)) != NULL; | |
758 | pp = &p->next) { | |
759 | if (p->port == port) | |
760 | return -EEXIST; | |
761 | if ((unsigned long)p->port < (unsigned long)port) | |
762 | break; | |
763 | } | |
764 | ||
79abc875 | 765 | p = br_multicast_new_port_group(port, group, *pp, entry->state, NULL, |
8b671779 | 766 | MCAST_EXCLUDE); |
cfd56754 CW |
767 | if (unlikely(!p)) |
768 | return -ENOMEM; | |
769 | rcu_assign_pointer(*pp, p); | |
79abc875 | 770 | if (entry->state == MDB_TEMPORARY) |
f7e2965d | 771 | mod_timer(&p->timer, now + br->multicast_membership_interval); |
81f19838 | 772 | br_mdb_notify(br->dev, mp, p, RTM_NEWMDB); |
cfd56754 | 773 | |
cfd56754 CW |
774 | return 0; |
775 | } | |
776 | ||
777 | static int __br_mdb_add(struct net *net, struct net_bridge *br, | |
45ebcce5 | 778 | struct br_mdb_entry *entry) |
cfd56754 CW |
779 | { |
780 | struct br_ip ip; | |
781 | struct net_device *dev; | |
1bc844ee | 782 | struct net_bridge_port *p = NULL; |
cfd56754 CW |
783 | int ret; |
784 | ||
13cefad2 | 785 | if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
cfd56754 CW |
786 | return -EINVAL; |
787 | ||
1bc844ee NA |
788 | if (entry->ifindex != br->dev->ifindex) { |
789 | dev = __dev_get_by_index(net, entry->ifindex); | |
790 | if (!dev) | |
791 | return -ENODEV; | |
cfd56754 | 792 | |
1bc844ee NA |
793 | p = br_port_get_rtnl(dev); |
794 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
795 | return -EINVAL; | |
796 | } | |
cfd56754 | 797 | |
6dd684c0 | 798 | __mdb_entry_to_br_ip(entry, &ip); |
cfd56754 CW |
799 | |
800 | spin_lock_bh(&br->multicast_lock); | |
79abc875 | 801 | ret = br_mdb_add_group(br, p, &ip, entry); |
cfd56754 CW |
802 | spin_unlock_bh(&br->multicast_lock); |
803 | return ret; | |
804 | } | |
805 | ||
c21ef3e3 DA |
806 | static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, |
807 | struct netlink_ext_ack *extack) | |
cfd56754 CW |
808 | { |
809 | struct net *net = sock_net(skb->sk); | |
2594e906 | 810 | struct net_bridge_vlan_group *vg; |
1bc844ee | 811 | struct net_bridge_port *p = NULL; |
e44deb2f | 812 | struct net_device *dev, *pdev; |
cfd56754 | 813 | struct br_mdb_entry *entry; |
2594e906 | 814 | struct net_bridge_vlan *v; |
cfd56754 CW |
815 | struct net_bridge *br; |
816 | int err; | |
817 | ||
2ac95dfe | 818 | err = br_mdb_parse(skb, nlh, &dev, &entry, extack); |
cfd56754 CW |
819 | if (err < 0) |
820 | return err; | |
821 | ||
822 | br = netdev_priv(dev); | |
823 | ||
1bc844ee NA |
824 | if (entry->ifindex != br->dev->ifindex) { |
825 | pdev = __dev_get_by_index(net, entry->ifindex); | |
826 | if (!pdev) | |
827 | return -ENODEV; | |
e44deb2f | 828 | |
1bc844ee NA |
829 | p = br_port_get_rtnl(pdev); |
830 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
831 | return -EINVAL; | |
832 | vg = nbp_vlan_group(p); | |
833 | } else { | |
834 | vg = br_vlan_group(br); | |
835 | } | |
e44deb2f | 836 | |
f59783f5 NA |
837 | /* If vlan filtering is enabled and VLAN is not specified |
838 | * install mdb entry on all vlans configured on the port. | |
839 | */ | |
1f51445a | 840 | if (br_vlan_enabled(br->dev) && vg && entry->vid == 0) { |
2594e906 NA |
841 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
842 | entry->vid = v->vid; | |
45ebcce5 | 843 | err = __br_mdb_add(net, br, entry); |
e44deb2f SA |
844 | if (err) |
845 | break; | |
e44deb2f SA |
846 | } |
847 | } else { | |
45ebcce5 | 848 | err = __br_mdb_add(net, br, entry); |
e44deb2f SA |
849 | } |
850 | ||
cfd56754 CW |
851 | return err; |
852 | } | |
853 | ||
854 | static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry) | |
855 | { | |
cfd56754 CW |
856 | struct net_bridge_mdb_entry *mp; |
857 | struct net_bridge_port_group *p; | |
858 | struct net_bridge_port_group __rcu **pp; | |
859 | struct br_ip ip; | |
860 | int err = -EINVAL; | |
861 | ||
13cefad2 | 862 | if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
cfd56754 CW |
863 | return -EINVAL; |
864 | ||
6dd684c0 | 865 | __mdb_entry_to_br_ip(entry, &ip); |
cfd56754 CW |
866 | |
867 | spin_lock_bh(&br->multicast_lock); | |
19e3a9c9 | 868 | mp = br_mdb_ip_get(br, &ip); |
cfd56754 CW |
869 | if (!mp) |
870 | goto unlock; | |
871 | ||
1bc844ee NA |
872 | /* host leave */ |
873 | if (entry->ifindex == mp->br->dev->ifindex && mp->host_joined) { | |
874 | br_multicast_host_leave(mp, false); | |
875 | err = 0; | |
81f19838 | 876 | br_mdb_notify(br->dev, mp, NULL, RTM_DELMDB); |
1bc844ee NA |
877 | if (!mp->ports && netif_running(br->dev)) |
878 | mod_timer(&mp->timer, jiffies); | |
879 | goto unlock; | |
880 | } | |
881 | ||
cfd56754 CW |
882 | for (pp = &mp->ports; |
883 | (p = mlock_dereference(*pp, br)) != NULL; | |
884 | pp = &p->next) { | |
885 | if (!p->port || p->port->dev->ifindex != entry->ifindex) | |
886 | continue; | |
887 | ||
888 | if (p->port->state == BR_STATE_DISABLED) | |
889 | goto unlock; | |
890 | ||
681590bd | 891 | br_multicast_del_pg(mp, p, pp); |
cfd56754 | 892 | err = 0; |
cfd56754 CW |
893 | break; |
894 | } | |
895 | ||
896 | unlock: | |
897 | spin_unlock_bh(&br->multicast_lock); | |
898 | return err; | |
899 | } | |
900 | ||
c21ef3e3 DA |
901 | static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, |
902 | struct netlink_ext_ack *extack) | |
cfd56754 | 903 | { |
e44deb2f | 904 | struct net *net = sock_net(skb->sk); |
2594e906 | 905 | struct net_bridge_vlan_group *vg; |
1bc844ee | 906 | struct net_bridge_port *p = NULL; |
e44deb2f | 907 | struct net_device *dev, *pdev; |
cfd56754 | 908 | struct br_mdb_entry *entry; |
2594e906 | 909 | struct net_bridge_vlan *v; |
cfd56754 CW |
910 | struct net_bridge *br; |
911 | int err; | |
912 | ||
2ac95dfe | 913 | err = br_mdb_parse(skb, nlh, &dev, &entry, extack); |
cfd56754 CW |
914 | if (err < 0) |
915 | return err; | |
916 | ||
917 | br = netdev_priv(dev); | |
918 | ||
1bc844ee NA |
919 | if (entry->ifindex != br->dev->ifindex) { |
920 | pdev = __dev_get_by_index(net, entry->ifindex); | |
921 | if (!pdev) | |
922 | return -ENODEV; | |
e44deb2f | 923 | |
1bc844ee NA |
924 | p = br_port_get_rtnl(pdev); |
925 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
926 | return -EINVAL; | |
927 | vg = nbp_vlan_group(p); | |
928 | } else { | |
929 | vg = br_vlan_group(br); | |
930 | } | |
e44deb2f | 931 | |
f59783f5 NA |
932 | /* If vlan filtering is enabled and VLAN is not specified |
933 | * delete mdb entry on all vlans configured on the port. | |
934 | */ | |
1f51445a | 935 | if (br_vlan_enabled(br->dev) && vg && entry->vid == 0) { |
2594e906 NA |
936 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
937 | entry->vid = v->vid; | |
e44deb2f | 938 | err = __br_mdb_del(br, entry); |
e44deb2f SA |
939 | } |
940 | } else { | |
941 | err = __br_mdb_del(br, entry); | |
e44deb2f SA |
942 | } |
943 | ||
cfd56754 CW |
944 | return err; |
945 | } | |
946 | ||
ee07c6e7 CW |
947 | void br_mdb_init(void) |
948 | { | |
c1c502b5 FW |
949 | rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, 0); |
950 | rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, 0); | |
951 | rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, 0); | |
ee07c6e7 | 952 | } |
63233159 VY |
953 | |
954 | void br_mdb_uninit(void) | |
955 | { | |
956 | rtnl_unregister(PF_BRIDGE, RTM_GETMDB); | |
957 | rtnl_unregister(PF_BRIDGE, RTM_NEWMDB); | |
958 | rtnl_unregister(PF_BRIDGE, RTM_DELMDB); | |
959 | } |