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 | ||
29 | nest = nla_nest_start(skb, MDBA_ROUTER); | |
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; | |
36 | port_nest = nla_nest_start(skb, MDBA_ROUTER_PORT); | |
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; | |
63 | } | |
64 | ||
6dd684c0 ER |
65 | static void __mdb_entry_to_br_ip(struct br_mdb_entry *entry, struct br_ip *ip) |
66 | { | |
67 | memset(ip, 0, sizeof(struct br_ip)); | |
68 | ip->vid = entry->vid; | |
69 | ip->proto = entry->addr.proto; | |
70 | if (ip->proto == htons(ETH_P_IP)) | |
71 | ip->u.ip4 = entry->addr.u.ip4; | |
72 | #if IS_ENABLED(CONFIG_IPV6) | |
73 | else | |
74 | ip->u.ip6 = entry->addr.u.ip6; | |
75 | #endif | |
76 | } | |
77 | ||
ee07c6e7 CW |
78 | static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb, |
79 | struct net_device *dev) | |
80 | { | |
81 | struct net_bridge *br = netdev_priv(dev); | |
82 | struct net_bridge_mdb_htable *mdb; | |
83 | struct nlattr *nest, *nest2; | |
84 | int i, err = 0; | |
85 | int idx = 0, s_idx = cb->args[1]; | |
86 | ||
13cefad2 | 87 | if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
ee07c6e7 CW |
88 | return 0; |
89 | ||
90 | mdb = rcu_dereference(br->mdb); | |
91 | if (!mdb) | |
92 | return 0; | |
93 | ||
94 | nest = nla_nest_start(skb, MDBA_MDB); | |
95 | if (nest == NULL) | |
96 | return -EMSGSIZE; | |
97 | ||
98 | for (i = 0; i < mdb->max; i++) { | |
ee07c6e7 | 99 | struct net_bridge_mdb_entry *mp; |
762a3d89 | 100 | struct net_bridge_port_group *p; |
101 | struct net_bridge_port_group __rcu **pp; | |
ee07c6e7 CW |
102 | struct net_bridge_port *port; |
103 | ||
b67bfe0d | 104 | hlist_for_each_entry_rcu(mp, &mdb->mhash[i], hlist[mdb->ver]) { |
ee07c6e7 CW |
105 | if (idx < s_idx) |
106 | goto skip; | |
107 | ||
108 | nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY); | |
109 | if (nest2 == NULL) { | |
110 | err = -EMSGSIZE; | |
111 | goto out; | |
112 | } | |
113 | ||
114 | for (pp = &mp->ports; | |
115 | (p = rcu_dereference(*pp)) != NULL; | |
116 | pp = &p->next) { | |
21257156 | 117 | struct nlattr *nest_ent; |
76cc173d NA |
118 | struct br_mdb_entry e; |
119 | ||
ee07c6e7 | 120 | port = p->port; |
76cc173d NA |
121 | if (!port) |
122 | continue; | |
21257156 | 123 | |
76cc173d NA |
124 | memset(&e, 0, sizeof(e)); |
125 | e.ifindex = port->dev->ifindex; | |
126 | e.vid = p->addr.vid; | |
127 | __mdb_entry_fill_flags(&e, p->flags); | |
128 | if (p->addr.proto == htons(ETH_P_IP)) | |
129 | e.addr.u.ip4 = p->addr.u.ip4; | |
ee07c6e7 | 130 | #if IS_ENABLED(CONFIG_IPV6) |
76cc173d NA |
131 | if (p->addr.proto == htons(ETH_P_IPV6)) |
132 | e.addr.u.ip6 = p->addr.u.ip6; | |
ee07c6e7 | 133 | #endif |
76cc173d | 134 | e.addr.proto = p->addr.proto; |
21257156 NA |
135 | nest_ent = nla_nest_start(skb, |
136 | MDBA_MDB_ENTRY_INFO); | |
137 | if (!nest_ent) { | |
138 | nla_nest_cancel(skb, nest2); | |
139 | err = -EMSGSIZE; | |
140 | goto out; | |
141 | } | |
142 | if (nla_put_nohdr(skb, sizeof(e), &e) || | |
143 | nla_put_u32(skb, | |
144 | MDBA_MDB_EATTR_TIMER, | |
145 | br_timer_value(&p->timer))) { | |
146 | nla_nest_cancel(skb, nest_ent); | |
76cc173d NA |
147 | nla_nest_cancel(skb, nest2); |
148 | err = -EMSGSIZE; | |
149 | goto out; | |
ee07c6e7 | 150 | } |
21257156 | 151 | nla_nest_end(skb, nest_ent); |
ee07c6e7 CW |
152 | } |
153 | nla_nest_end(skb, nest2); | |
154 | skip: | |
155 | idx++; | |
156 | } | |
157 | } | |
158 | ||
159 | out: | |
160 | cb->args[1] = idx; | |
161 | nla_nest_end(skb, nest); | |
162 | return err; | |
163 | } | |
164 | ||
165 | static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
166 | { | |
167 | struct net_device *dev; | |
168 | struct net *net = sock_net(skb->sk); | |
169 | struct nlmsghdr *nlh = NULL; | |
170 | int idx = 0, s_idx; | |
171 | ||
172 | s_idx = cb->args[0]; | |
173 | ||
174 | rcu_read_lock(); | |
175 | ||
2ce297fc CW |
176 | /* In theory this could be wrapped to 0... */ |
177 | cb->seq = net->dev_base_seq + br_mdb_rehash_seq; | |
ee07c6e7 CW |
178 | |
179 | for_each_netdev_rcu(net, dev) { | |
180 | if (dev->priv_flags & IFF_EBRIDGE) { | |
181 | struct br_port_msg *bpm; | |
182 | ||
183 | if (idx < s_idx) | |
184 | goto skip; | |
185 | ||
186 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
187 | cb->nlh->nlmsg_seq, RTM_GETMDB, | |
188 | sizeof(*bpm), NLM_F_MULTI); | |
189 | if (nlh == NULL) | |
190 | break; | |
191 | ||
192 | bpm = nlmsg_data(nlh); | |
c085c499 | 193 | memset(bpm, 0, sizeof(*bpm)); |
ee07c6e7 CW |
194 | bpm->ifindex = dev->ifindex; |
195 | if (br_mdb_fill_info(skb, cb, dev) < 0) | |
196 | goto out; | |
197 | if (br_rports_fill_info(skb, cb, dev) < 0) | |
198 | goto out; | |
199 | ||
200 | cb->args[1] = 0; | |
201 | nlmsg_end(skb, nlh); | |
202 | skip: | |
203 | idx++; | |
204 | } | |
205 | } | |
206 | ||
207 | out: | |
208 | if (nlh) | |
209 | nlmsg_end(skb, nlh); | |
210 | rcu_read_unlock(); | |
211 | cb->args[0] = idx; | |
212 | return skb->len; | |
213 | } | |
214 | ||
37a393bc CW |
215 | static int nlmsg_populate_mdb_fill(struct sk_buff *skb, |
216 | struct net_device *dev, | |
217 | struct br_mdb_entry *entry, u32 pid, | |
218 | u32 seq, int type, unsigned int flags) | |
219 | { | |
220 | struct nlmsghdr *nlh; | |
221 | struct br_port_msg *bpm; | |
222 | struct nlattr *nest, *nest2; | |
223 | ||
82199679 | 224 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0); |
37a393bc CW |
225 | if (!nlh) |
226 | return -EMSGSIZE; | |
227 | ||
228 | bpm = nlmsg_data(nlh); | |
c085c499 | 229 | memset(bpm, 0, sizeof(*bpm)); |
37a393bc CW |
230 | bpm->family = AF_BRIDGE; |
231 | bpm->ifindex = dev->ifindex; | |
232 | nest = nla_nest_start(skb, MDBA_MDB); | |
233 | if (nest == NULL) | |
234 | goto cancel; | |
235 | nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY); | |
236 | if (nest2 == NULL) | |
237 | goto end; | |
238 | ||
239 | if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry)) | |
240 | goto end; | |
241 | ||
242 | nla_nest_end(skb, nest2); | |
243 | nla_nest_end(skb, nest); | |
053c095a JB |
244 | nlmsg_end(skb, nlh); |
245 | return 0; | |
37a393bc CW |
246 | |
247 | end: | |
248 | nla_nest_end(skb, nest); | |
249 | cancel: | |
250 | nlmsg_cancel(skb, nlh); | |
251 | return -EMSGSIZE; | |
252 | } | |
253 | ||
254 | static inline size_t rtnl_mdb_nlmsg_size(void) | |
255 | { | |
256 | return NLMSG_ALIGN(sizeof(struct br_port_msg)) | |
257 | + nla_total_size(sizeof(struct br_mdb_entry)); | |
258 | } | |
259 | ||
45ebcce5 ER |
260 | struct br_mdb_complete_info { |
261 | struct net_bridge_port *port; | |
262 | struct br_ip ip; | |
263 | }; | |
264 | ||
265 | static void br_mdb_complete(struct net_device *dev, int err, void *priv) | |
37a393bc | 266 | { |
45ebcce5 ER |
267 | struct br_mdb_complete_info *data = priv; |
268 | struct net_bridge_port_group __rcu **pp; | |
269 | struct net_bridge_port_group *p; | |
270 | struct net_bridge_mdb_htable *mdb; | |
271 | struct net_bridge_mdb_entry *mp; | |
272 | struct net_bridge_port *port = data->port; | |
273 | struct net_bridge *br = port->br; | |
274 | ||
275 | if (err) | |
276 | goto err; | |
277 | ||
278 | spin_lock_bh(&br->multicast_lock); | |
279 | mdb = mlock_dereference(br->mdb, br); | |
280 | mp = br_mdb_ip_get(mdb, &data->ip); | |
281 | if (!mp) | |
282 | goto out; | |
283 | for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL; | |
284 | pp = &p->next) { | |
285 | if (p->port != port) | |
286 | continue; | |
287 | p->flags |= MDB_PG_FLAGS_OFFLOAD; | |
288 | } | |
289 | out: | |
290 | spin_unlock_bh(&br->multicast_lock); | |
291 | err: | |
292 | kfree(priv); | |
293 | } | |
294 | ||
47d5b6db AL |
295 | static void br_mdb_switchdev_host_port(struct net_device *dev, |
296 | struct net_device *lower_dev, | |
297 | struct br_mdb_entry *entry, int type) | |
298 | { | |
299 | struct switchdev_obj_port_mdb mdb = { | |
300 | .obj = { | |
301 | .id = SWITCHDEV_OBJ_ID_HOST_MDB, | |
302 | .flags = SWITCHDEV_F_DEFER, | |
303 | }, | |
304 | .vid = entry->vid, | |
305 | }; | |
306 | ||
307 | if (entry->addr.proto == htons(ETH_P_IP)) | |
308 | ip_eth_mc_map(entry->addr.u.ip4, mdb.addr); | |
309 | #if IS_ENABLED(CONFIG_IPV6) | |
310 | else | |
311 | ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr); | |
312 | #endif | |
313 | ||
314 | mdb.obj.orig_dev = dev; | |
315 | switch (type) { | |
316 | case RTM_NEWMDB: | |
317 | switchdev_port_obj_add(lower_dev, &mdb.obj); | |
318 | break; | |
319 | case RTM_DELMDB: | |
320 | switchdev_port_obj_del(lower_dev, &mdb.obj); | |
321 | break; | |
322 | } | |
323 | } | |
324 | ||
325 | static void br_mdb_switchdev_host(struct net_device *dev, | |
326 | struct br_mdb_entry *entry, int type) | |
327 | { | |
328 | struct net_device *lower_dev; | |
329 | struct list_head *iter; | |
330 | ||
331 | netdev_for_each_lower_dev(dev, lower_dev, iter) | |
332 | br_mdb_switchdev_host_port(dev, lower_dev, entry, type); | |
333 | } | |
334 | ||
45ebcce5 ER |
335 | static void __br_mdb_notify(struct net_device *dev, struct net_bridge_port *p, |
336 | struct br_mdb_entry *entry, int type) | |
337 | { | |
338 | struct br_mdb_complete_info *complete_info; | |
f1fecb1d ER |
339 | struct switchdev_obj_port_mdb mdb = { |
340 | .obj = { | |
341 | .id = SWITCHDEV_OBJ_ID_PORT_MDB, | |
342 | .flags = SWITCHDEV_F_DEFER, | |
343 | }, | |
344 | .vid = entry->vid, | |
345 | }; | |
346 | struct net_device *port_dev; | |
37a393bc CW |
347 | struct net *net = dev_net(dev); |
348 | struct sk_buff *skb; | |
349 | int err = -ENOBUFS; | |
350 | ||
f1fecb1d ER |
351 | port_dev = __dev_get_by_index(net, entry->ifindex); |
352 | if (entry->addr.proto == htons(ETH_P_IP)) | |
353 | ip_eth_mc_map(entry->addr.u.ip4, mdb.addr); | |
354 | #if IS_ENABLED(CONFIG_IPV6) | |
355 | else | |
356 | ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr); | |
357 | #endif | |
358 | ||
359 | mdb.obj.orig_dev = port_dev; | |
2a26028d | 360 | if (p && port_dev && type == RTM_NEWMDB) { |
45ebcce5 ER |
361 | complete_info = kmalloc(sizeof(*complete_info), GFP_ATOMIC); |
362 | if (complete_info) { | |
363 | complete_info->port = p; | |
364 | __mdb_entry_to_br_ip(entry, &complete_info->ip); | |
365 | mdb.obj.complete_priv = complete_info; | |
366 | mdb.obj.complete = br_mdb_complete; | |
1bfb1596 EV |
367 | if (switchdev_port_obj_add(port_dev, &mdb.obj)) |
368 | kfree(complete_info); | |
45ebcce5 | 369 | } |
2a26028d | 370 | } else if (p && port_dev && type == RTM_DELMDB) { |
f1fecb1d | 371 | switchdev_port_obj_del(port_dev, &mdb.obj); |
9e8430f8 | 372 | } |
f1fecb1d | 373 | |
47d5b6db AL |
374 | if (!p) |
375 | br_mdb_switchdev_host(dev, entry, type); | |
376 | ||
37a393bc CW |
377 | skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC); |
378 | if (!skb) | |
379 | goto errout; | |
380 | ||
381 | err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF); | |
382 | if (err < 0) { | |
383 | kfree_skb(skb); | |
384 | goto errout; | |
385 | } | |
386 | ||
387 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
388 | return; | |
389 | errout: | |
390 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
391 | } | |
392 | ||
45ebcce5 ER |
393 | void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, |
394 | struct br_ip *group, int type, u8 flags) | |
37a393bc CW |
395 | { |
396 | struct br_mdb_entry entry; | |
397 | ||
c085c499 | 398 | memset(&entry, 0, sizeof(entry)); |
2a26028d AL |
399 | if (port) |
400 | entry.ifindex = port->dev->ifindex; | |
401 | else | |
402 | entry.ifindex = dev->ifindex; | |
45ebcce5 ER |
403 | entry.addr.proto = group->proto; |
404 | entry.addr.u.ip4 = group->u.ip4; | |
37a393bc | 405 | #if IS_ENABLED(CONFIG_IPV6) |
45ebcce5 | 406 | entry.addr.u.ip6 = group->u.ip6; |
37a393bc | 407 | #endif |
45ebcce5 ER |
408 | entry.vid = group->vid; |
409 | __mdb_entry_fill_flags(&entry, flags); | |
410 | __br_mdb_notify(dev, port, &entry, type); | |
37a393bc CW |
411 | } |
412 | ||
949f1e39 SA |
413 | static int nlmsg_populate_rtr_fill(struct sk_buff *skb, |
414 | struct net_device *dev, | |
415 | int ifindex, u32 pid, | |
416 | u32 seq, int type, unsigned int flags) | |
417 | { | |
418 | struct br_port_msg *bpm; | |
419 | struct nlmsghdr *nlh; | |
420 | struct nlattr *nest; | |
421 | ||
422 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI); | |
423 | if (!nlh) | |
424 | return -EMSGSIZE; | |
425 | ||
426 | bpm = nlmsg_data(nlh); | |
427 | memset(bpm, 0, sizeof(*bpm)); | |
428 | bpm->family = AF_BRIDGE; | |
429 | bpm->ifindex = dev->ifindex; | |
430 | nest = nla_nest_start(skb, MDBA_ROUTER); | |
431 | if (!nest) | |
432 | goto cancel; | |
433 | ||
434 | if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex)) | |
435 | goto end; | |
436 | ||
437 | nla_nest_end(skb, nest); | |
438 | nlmsg_end(skb, nlh); | |
439 | return 0; | |
440 | ||
441 | end: | |
442 | nla_nest_end(skb, nest); | |
443 | cancel: | |
444 | nlmsg_cancel(skb, nlh); | |
445 | return -EMSGSIZE; | |
446 | } | |
447 | ||
448 | static inline size_t rtnl_rtr_nlmsg_size(void) | |
449 | { | |
450 | return NLMSG_ALIGN(sizeof(struct br_port_msg)) | |
451 | + nla_total_size(sizeof(__u32)); | |
452 | } | |
453 | ||
454 | void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, | |
455 | int type) | |
456 | { | |
457 | struct net *net = dev_net(dev); | |
458 | struct sk_buff *skb; | |
459 | int err = -ENOBUFS; | |
460 | int ifindex; | |
461 | ||
462 | ifindex = port ? port->dev->ifindex : 0; | |
463 | skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC); | |
464 | if (!skb) | |
465 | goto errout; | |
466 | ||
467 | err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF); | |
468 | if (err < 0) { | |
469 | kfree_skb(skb); | |
470 | goto errout; | |
471 | } | |
472 | ||
473 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
474 | return; | |
475 | ||
476 | errout: | |
477 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
478 | } | |
479 | ||
cfd56754 CW |
480 | static bool is_valid_mdb_entry(struct br_mdb_entry *entry) |
481 | { | |
482 | if (entry->ifindex == 0) | |
483 | return false; | |
484 | ||
485 | if (entry->addr.proto == htons(ETH_P_IP)) { | |
486 | if (!ipv4_is_multicast(entry->addr.u.ip4)) | |
487 | return false; | |
488 | if (ipv4_is_local_multicast(entry->addr.u.ip4)) | |
489 | return false; | |
490 | #if IS_ENABLED(CONFIG_IPV6) | |
491 | } else if (entry->addr.proto == htons(ETH_P_IPV6)) { | |
3c3769e6 | 492 | if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6)) |
cfd56754 CW |
493 | return false; |
494 | #endif | |
495 | } else | |
496 | return false; | |
ccb1c31a AW |
497 | if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) |
498 | return false; | |
74fe61f1 NA |
499 | if (entry->vid >= VLAN_VID_MASK) |
500 | return false; | |
cfd56754 CW |
501 | |
502 | return true; | |
503 | } | |
504 | ||
505 | static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh, | |
506 | struct net_device **pdev, struct br_mdb_entry **pentry) | |
507 | { | |
508 | struct net *net = sock_net(skb->sk); | |
509 | struct br_mdb_entry *entry; | |
510 | struct br_port_msg *bpm; | |
511 | struct nlattr *tb[MDBA_SET_ENTRY_MAX+1]; | |
512 | struct net_device *dev; | |
513 | int err; | |
514 | ||
fceb6435 JB |
515 | err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, NULL, |
516 | NULL); | |
cfd56754 CW |
517 | if (err < 0) |
518 | return err; | |
519 | ||
520 | bpm = nlmsg_data(nlh); | |
521 | if (bpm->ifindex == 0) { | |
522 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n"); | |
523 | return -EINVAL; | |
524 | } | |
525 | ||
526 | dev = __dev_get_by_index(net, bpm->ifindex); | |
527 | if (dev == NULL) { | |
528 | pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n"); | |
529 | return -ENODEV; | |
530 | } | |
531 | ||
532 | if (!(dev->priv_flags & IFF_EBRIDGE)) { | |
533 | pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n"); | |
534 | return -EOPNOTSUPP; | |
535 | } | |
536 | ||
537 | *pdev = dev; | |
538 | ||
539 | if (!tb[MDBA_SET_ENTRY] || | |
540 | nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) { | |
541 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n"); | |
542 | return -EINVAL; | |
543 | } | |
544 | ||
545 | entry = nla_data(tb[MDBA_SET_ENTRY]); | |
546 | if (!is_valid_mdb_entry(entry)) { | |
547 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n"); | |
548 | return -EINVAL; | |
549 | } | |
550 | ||
551 | *pentry = entry; | |
552 | return 0; | |
553 | } | |
554 | ||
555 | static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port, | |
45ebcce5 | 556 | struct br_ip *group, unsigned char state) |
cfd56754 CW |
557 | { |
558 | struct net_bridge_mdb_entry *mp; | |
559 | struct net_bridge_port_group *p; | |
560 | struct net_bridge_port_group __rcu **pp; | |
561 | struct net_bridge_mdb_htable *mdb; | |
f7e2965d | 562 | unsigned long now = jiffies; |
cfd56754 CW |
563 | int err; |
564 | ||
565 | mdb = mlock_dereference(br->mdb, br); | |
566 | mp = br_mdb_ip_get(mdb, group); | |
567 | if (!mp) { | |
568 | mp = br_multicast_new_group(br, port, group); | |
56bb7fd9 AB |
569 | err = PTR_ERR_OR_ZERO(mp); |
570 | if (err) | |
cfd56754 CW |
571 | return err; |
572 | } | |
573 | ||
574 | for (pp = &mp->ports; | |
575 | (p = mlock_dereference(*pp, br)) != NULL; | |
576 | pp = &p->next) { | |
577 | if (p->port == port) | |
578 | return -EEXIST; | |
579 | if ((unsigned long)p->port < (unsigned long)port) | |
580 | break; | |
581 | } | |
582 | ||
6db6f0ea | 583 | p = br_multicast_new_port_group(port, group, *pp, state, NULL); |
cfd56754 CW |
584 | if (unlikely(!p)) |
585 | return -ENOMEM; | |
586 | rcu_assign_pointer(*pp, p); | |
f7e2965d SA |
587 | if (state == MDB_TEMPORARY) |
588 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
cfd56754 | 589 | |
cfd56754 CW |
590 | return 0; |
591 | } | |
592 | ||
593 | static int __br_mdb_add(struct net *net, struct net_bridge *br, | |
45ebcce5 | 594 | struct br_mdb_entry *entry) |
cfd56754 CW |
595 | { |
596 | struct br_ip ip; | |
597 | struct net_device *dev; | |
598 | struct net_bridge_port *p; | |
599 | int ret; | |
600 | ||
13cefad2 | 601 | if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
cfd56754 CW |
602 | return -EINVAL; |
603 | ||
604 | dev = __dev_get_by_index(net, entry->ifindex); | |
605 | if (!dev) | |
606 | return -ENODEV; | |
607 | ||
608 | p = br_port_get_rtnl(dev); | |
609 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
610 | return -EINVAL; | |
611 | ||
6dd684c0 | 612 | __mdb_entry_to_br_ip(entry, &ip); |
cfd56754 CW |
613 | |
614 | spin_lock_bh(&br->multicast_lock); | |
45ebcce5 | 615 | ret = br_mdb_add_group(br, p, &ip, entry->state); |
cfd56754 CW |
616 | spin_unlock_bh(&br->multicast_lock); |
617 | return ret; | |
618 | } | |
619 | ||
c21ef3e3 DA |
620 | static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, |
621 | struct netlink_ext_ack *extack) | |
cfd56754 CW |
622 | { |
623 | struct net *net = sock_net(skb->sk); | |
2594e906 | 624 | struct net_bridge_vlan_group *vg; |
e44deb2f | 625 | struct net_device *dev, *pdev; |
cfd56754 | 626 | struct br_mdb_entry *entry; |
e44deb2f | 627 | struct net_bridge_port *p; |
2594e906 | 628 | struct net_bridge_vlan *v; |
cfd56754 CW |
629 | struct net_bridge *br; |
630 | int err; | |
631 | ||
632 | err = br_mdb_parse(skb, nlh, &dev, &entry); | |
633 | if (err < 0) | |
634 | return err; | |
635 | ||
636 | br = netdev_priv(dev); | |
637 | ||
e44deb2f SA |
638 | /* If vlan filtering is enabled and VLAN is not specified |
639 | * install mdb entry on all vlans configured on the port. | |
640 | */ | |
641 | pdev = __dev_get_by_index(net, entry->ifindex); | |
642 | if (!pdev) | |
643 | return -ENODEV; | |
644 | ||
645 | p = br_port_get_rtnl(pdev); | |
646 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
647 | return -EINVAL; | |
648 | ||
2594e906 | 649 | vg = nbp_vlan_group(p); |
1f51445a | 650 | if (br_vlan_enabled(br->dev) && vg && entry->vid == 0) { |
2594e906 NA |
651 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
652 | entry->vid = v->vid; | |
45ebcce5 | 653 | err = __br_mdb_add(net, br, entry); |
e44deb2f SA |
654 | if (err) |
655 | break; | |
45ebcce5 | 656 | __br_mdb_notify(dev, p, entry, RTM_NEWMDB); |
e44deb2f SA |
657 | } |
658 | } else { | |
45ebcce5 | 659 | err = __br_mdb_add(net, br, entry); |
e44deb2f | 660 | if (!err) |
45ebcce5 | 661 | __br_mdb_notify(dev, p, entry, RTM_NEWMDB); |
e44deb2f SA |
662 | } |
663 | ||
cfd56754 CW |
664 | return err; |
665 | } | |
666 | ||
667 | static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry) | |
668 | { | |
669 | struct net_bridge_mdb_htable *mdb; | |
670 | struct net_bridge_mdb_entry *mp; | |
671 | struct net_bridge_port_group *p; | |
672 | struct net_bridge_port_group __rcu **pp; | |
673 | struct br_ip ip; | |
674 | int err = -EINVAL; | |
675 | ||
13cefad2 | 676 | if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED)) |
cfd56754 CW |
677 | return -EINVAL; |
678 | ||
6dd684c0 | 679 | __mdb_entry_to_br_ip(entry, &ip); |
cfd56754 CW |
680 | |
681 | spin_lock_bh(&br->multicast_lock); | |
682 | mdb = mlock_dereference(br->mdb, br); | |
683 | ||
684 | mp = br_mdb_ip_get(mdb, &ip); | |
685 | if (!mp) | |
686 | goto unlock; | |
687 | ||
688 | for (pp = &mp->ports; | |
689 | (p = mlock_dereference(*pp, br)) != NULL; | |
690 | pp = &p->next) { | |
691 | if (!p->port || p->port->dev->ifindex != entry->ifindex) | |
692 | continue; | |
693 | ||
694 | if (p->port->state == BR_STATE_DISABLED) | |
695 | goto unlock; | |
696 | ||
9d06b6d8 | 697 | __mdb_entry_fill_flags(entry, p->flags); |
cfd56754 CW |
698 | rcu_assign_pointer(*pp, p->next); |
699 | hlist_del_init(&p->mglist); | |
700 | del_timer(&p->timer); | |
701 | call_rcu_bh(&p->rcu, br_multicast_free_pg); | |
702 | err = 0; | |
703 | ||
ff0fd34e | 704 | if (!mp->ports && !mp->host_joined && |
cfd56754 CW |
705 | netif_running(br->dev)) |
706 | mod_timer(&mp->timer, jiffies); | |
707 | break; | |
708 | } | |
709 | ||
710 | unlock: | |
711 | spin_unlock_bh(&br->multicast_lock); | |
712 | return err; | |
713 | } | |
714 | ||
c21ef3e3 DA |
715 | static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, |
716 | struct netlink_ext_ack *extack) | |
cfd56754 | 717 | { |
e44deb2f | 718 | struct net *net = sock_net(skb->sk); |
2594e906 | 719 | struct net_bridge_vlan_group *vg; |
e44deb2f | 720 | struct net_device *dev, *pdev; |
cfd56754 | 721 | struct br_mdb_entry *entry; |
e44deb2f | 722 | struct net_bridge_port *p; |
2594e906 | 723 | struct net_bridge_vlan *v; |
cfd56754 CW |
724 | struct net_bridge *br; |
725 | int err; | |
726 | ||
727 | err = br_mdb_parse(skb, nlh, &dev, &entry); | |
728 | if (err < 0) | |
729 | return err; | |
730 | ||
731 | br = netdev_priv(dev); | |
732 | ||
e44deb2f SA |
733 | /* If vlan filtering is enabled and VLAN is not specified |
734 | * delete mdb entry on all vlans configured on the port. | |
735 | */ | |
736 | pdev = __dev_get_by_index(net, entry->ifindex); | |
737 | if (!pdev) | |
738 | return -ENODEV; | |
739 | ||
740 | p = br_port_get_rtnl(pdev); | |
741 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
742 | return -EINVAL; | |
743 | ||
2594e906 | 744 | vg = nbp_vlan_group(p); |
1f51445a | 745 | if (br_vlan_enabled(br->dev) && vg && entry->vid == 0) { |
2594e906 NA |
746 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
747 | entry->vid = v->vid; | |
e44deb2f SA |
748 | err = __br_mdb_del(br, entry); |
749 | if (!err) | |
45ebcce5 | 750 | __br_mdb_notify(dev, p, entry, RTM_DELMDB); |
e44deb2f SA |
751 | } |
752 | } else { | |
753 | err = __br_mdb_del(br, entry); | |
754 | if (!err) | |
45ebcce5 | 755 | __br_mdb_notify(dev, p, entry, RTM_DELMDB); |
e44deb2f SA |
756 | } |
757 | ||
cfd56754 CW |
758 | return err; |
759 | } | |
760 | ||
ee07c6e7 CW |
761 | void br_mdb_init(void) |
762 | { | |
c1c502b5 FW |
763 | rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, 0); |
764 | rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, 0); | |
765 | rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, 0); | |
ee07c6e7 | 766 | } |
63233159 VY |
767 | |
768 | void br_mdb_uninit(void) | |
769 | { | |
770 | rtnl_unregister(PF_BRIDGE, RTM_GETMDB); | |
771 | rtnl_unregister(PF_BRIDGE, RTM_NEWMDB); | |
772 | rtnl_unregister(PF_BRIDGE, RTM_DELMDB); | |
773 | } |