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Commit | Line | Data |
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ee07c6e7 CW |
1 | #include <linux/err.h> |
2 | #include <linux/igmp.h> | |
3 | #include <linux/kernel.h> | |
4 | #include <linux/netdevice.h> | |
5 | #include <linux/rculist.h> | |
6 | #include <linux/skbuff.h> | |
cfd56754 | 7 | #include <linux/if_ether.h> |
ee07c6e7 CW |
8 | #include <net/ip.h> |
9 | #include <net/netlink.h> | |
f1fecb1d | 10 | #include <net/switchdev.h> |
ee07c6e7 CW |
11 | #if IS_ENABLED(CONFIG_IPV6) |
12 | #include <net/ipv6.h> | |
3c3769e6 | 13 | #include <net/addrconf.h> |
ee07c6e7 CW |
14 | #endif |
15 | ||
16 | #include "br_private.h" | |
17 | ||
18 | static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb, | |
19 | struct net_device *dev) | |
20 | { | |
21 | struct net_bridge *br = netdev_priv(dev); | |
22 | struct net_bridge_port *p; | |
ee07c6e7 CW |
23 | struct nlattr *nest; |
24 | ||
25 | if (!br->multicast_router || hlist_empty(&br->router_list)) | |
26 | return 0; | |
27 | ||
28 | nest = nla_nest_start(skb, MDBA_ROUTER); | |
29 | if (nest == NULL) | |
30 | return -EMSGSIZE; | |
31 | ||
b67bfe0d | 32 | hlist_for_each_entry_rcu(p, &br->router_list, rlist) { |
ee07c6e7 CW |
33 | if (p && nla_put_u32(skb, MDBA_ROUTER_PORT, p->dev->ifindex)) |
34 | goto fail; | |
35 | } | |
36 | ||
37 | nla_nest_end(skb, nest); | |
38 | return 0; | |
39 | fail: | |
40 | nla_nest_cancel(skb, nest); | |
41 | return -EMSGSIZE; | |
42 | } | |
43 | ||
44 | static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb, | |
45 | struct net_device *dev) | |
46 | { | |
47 | struct net_bridge *br = netdev_priv(dev); | |
48 | struct net_bridge_mdb_htable *mdb; | |
49 | struct nlattr *nest, *nest2; | |
50 | int i, err = 0; | |
51 | int idx = 0, s_idx = cb->args[1]; | |
52 | ||
53 | if (br->multicast_disabled) | |
54 | return 0; | |
55 | ||
56 | mdb = rcu_dereference(br->mdb); | |
57 | if (!mdb) | |
58 | return 0; | |
59 | ||
60 | nest = nla_nest_start(skb, MDBA_MDB); | |
61 | if (nest == NULL) | |
62 | return -EMSGSIZE; | |
63 | ||
64 | for (i = 0; i < mdb->max; i++) { | |
ee07c6e7 | 65 | struct net_bridge_mdb_entry *mp; |
762a3d89 | 66 | struct net_bridge_port_group *p; |
67 | struct net_bridge_port_group __rcu **pp; | |
ee07c6e7 CW |
68 | struct net_bridge_port *port; |
69 | ||
b67bfe0d | 70 | hlist_for_each_entry_rcu(mp, &mdb->mhash[i], hlist[mdb->ver]) { |
ee07c6e7 CW |
71 | if (idx < s_idx) |
72 | goto skip; | |
73 | ||
74 | nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY); | |
75 | if (nest2 == NULL) { | |
76 | err = -EMSGSIZE; | |
77 | goto out; | |
78 | } | |
79 | ||
80 | for (pp = &mp->ports; | |
81 | (p = rcu_dereference(*pp)) != NULL; | |
82 | pp = &p->next) { | |
83 | port = p->port; | |
84 | if (port) { | |
85 | struct br_mdb_entry e; | |
c085c499 | 86 | memset(&e, 0, sizeof(e)); |
ee07c6e7 | 87 | e.ifindex = port->dev->ifindex; |
ccb1c31a | 88 | e.state = p->state; |
74fe61f1 | 89 | e.vid = p->addr.vid; |
09d7cf7d VY |
90 | if (p->addr.proto == htons(ETH_P_IP)) |
91 | e.addr.u.ip4 = p->addr.u.ip4; | |
ee07c6e7 | 92 | #if IS_ENABLED(CONFIG_IPV6) |
09d7cf7d VY |
93 | if (p->addr.proto == htons(ETH_P_IPV6)) |
94 | e.addr.u.ip6 = p->addr.u.ip6; | |
ee07c6e7 CW |
95 | #endif |
96 | e.addr.proto = p->addr.proto; | |
97 | if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(e), &e)) { | |
98 | nla_nest_cancel(skb, nest2); | |
99 | err = -EMSGSIZE; | |
100 | goto out; | |
101 | } | |
102 | } | |
103 | } | |
104 | nla_nest_end(skb, nest2); | |
105 | skip: | |
106 | idx++; | |
107 | } | |
108 | } | |
109 | ||
110 | out: | |
111 | cb->args[1] = idx; | |
112 | nla_nest_end(skb, nest); | |
113 | return err; | |
114 | } | |
115 | ||
116 | static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
117 | { | |
118 | struct net_device *dev; | |
119 | struct net *net = sock_net(skb->sk); | |
120 | struct nlmsghdr *nlh = NULL; | |
121 | int idx = 0, s_idx; | |
122 | ||
123 | s_idx = cb->args[0]; | |
124 | ||
125 | rcu_read_lock(); | |
126 | ||
2ce297fc CW |
127 | /* In theory this could be wrapped to 0... */ |
128 | cb->seq = net->dev_base_seq + br_mdb_rehash_seq; | |
ee07c6e7 CW |
129 | |
130 | for_each_netdev_rcu(net, dev) { | |
131 | if (dev->priv_flags & IFF_EBRIDGE) { | |
132 | struct br_port_msg *bpm; | |
133 | ||
134 | if (idx < s_idx) | |
135 | goto skip; | |
136 | ||
137 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
138 | cb->nlh->nlmsg_seq, RTM_GETMDB, | |
139 | sizeof(*bpm), NLM_F_MULTI); | |
140 | if (nlh == NULL) | |
141 | break; | |
142 | ||
143 | bpm = nlmsg_data(nlh); | |
c085c499 | 144 | memset(bpm, 0, sizeof(*bpm)); |
ee07c6e7 CW |
145 | bpm->ifindex = dev->ifindex; |
146 | if (br_mdb_fill_info(skb, cb, dev) < 0) | |
147 | goto out; | |
148 | if (br_rports_fill_info(skb, cb, dev) < 0) | |
149 | goto out; | |
150 | ||
151 | cb->args[1] = 0; | |
152 | nlmsg_end(skb, nlh); | |
153 | skip: | |
154 | idx++; | |
155 | } | |
156 | } | |
157 | ||
158 | out: | |
159 | if (nlh) | |
160 | nlmsg_end(skb, nlh); | |
161 | rcu_read_unlock(); | |
162 | cb->args[0] = idx; | |
163 | return skb->len; | |
164 | } | |
165 | ||
37a393bc CW |
166 | static int nlmsg_populate_mdb_fill(struct sk_buff *skb, |
167 | struct net_device *dev, | |
168 | struct br_mdb_entry *entry, u32 pid, | |
169 | u32 seq, int type, unsigned int flags) | |
170 | { | |
171 | struct nlmsghdr *nlh; | |
172 | struct br_port_msg *bpm; | |
173 | struct nlattr *nest, *nest2; | |
174 | ||
82199679 | 175 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0); |
37a393bc CW |
176 | if (!nlh) |
177 | return -EMSGSIZE; | |
178 | ||
179 | bpm = nlmsg_data(nlh); | |
c085c499 | 180 | memset(bpm, 0, sizeof(*bpm)); |
37a393bc CW |
181 | bpm->family = AF_BRIDGE; |
182 | bpm->ifindex = dev->ifindex; | |
183 | nest = nla_nest_start(skb, MDBA_MDB); | |
184 | if (nest == NULL) | |
185 | goto cancel; | |
186 | nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY); | |
187 | if (nest2 == NULL) | |
188 | goto end; | |
189 | ||
190 | if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry)) | |
191 | goto end; | |
192 | ||
193 | nla_nest_end(skb, nest2); | |
194 | nla_nest_end(skb, nest); | |
053c095a JB |
195 | nlmsg_end(skb, nlh); |
196 | return 0; | |
37a393bc CW |
197 | |
198 | end: | |
199 | nla_nest_end(skb, nest); | |
200 | cancel: | |
201 | nlmsg_cancel(skb, nlh); | |
202 | return -EMSGSIZE; | |
203 | } | |
204 | ||
205 | static inline size_t rtnl_mdb_nlmsg_size(void) | |
206 | { | |
207 | return NLMSG_ALIGN(sizeof(struct br_port_msg)) | |
208 | + nla_total_size(sizeof(struct br_mdb_entry)); | |
209 | } | |
210 | ||
211 | static void __br_mdb_notify(struct net_device *dev, struct br_mdb_entry *entry, | |
212 | int type) | |
213 | { | |
f1fecb1d ER |
214 | struct switchdev_obj_port_mdb mdb = { |
215 | .obj = { | |
216 | .id = SWITCHDEV_OBJ_ID_PORT_MDB, | |
217 | .flags = SWITCHDEV_F_DEFER, | |
218 | }, | |
219 | .vid = entry->vid, | |
220 | }; | |
221 | struct net_device *port_dev; | |
37a393bc CW |
222 | struct net *net = dev_net(dev); |
223 | struct sk_buff *skb; | |
224 | int err = -ENOBUFS; | |
225 | ||
f1fecb1d ER |
226 | port_dev = __dev_get_by_index(net, entry->ifindex); |
227 | if (entry->addr.proto == htons(ETH_P_IP)) | |
228 | ip_eth_mc_map(entry->addr.u.ip4, mdb.addr); | |
229 | #if IS_ENABLED(CONFIG_IPV6) | |
230 | else | |
231 | ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr); | |
232 | #endif | |
233 | ||
234 | mdb.obj.orig_dev = port_dev; | |
235 | if (port_dev && type == RTM_NEWMDB) | |
236 | switchdev_port_obj_add(port_dev, &mdb.obj); | |
237 | else if (port_dev && type == RTM_DELMDB) | |
238 | switchdev_port_obj_del(port_dev, &mdb.obj); | |
239 | ||
37a393bc CW |
240 | skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC); |
241 | if (!skb) | |
242 | goto errout; | |
243 | ||
244 | err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF); | |
245 | if (err < 0) { | |
246 | kfree_skb(skb); | |
247 | goto errout; | |
248 | } | |
249 | ||
250 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
251 | return; | |
252 | errout: | |
253 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
254 | } | |
255 | ||
256 | void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, | |
09cf0211 | 257 | struct br_ip *group, int type, u8 state) |
37a393bc CW |
258 | { |
259 | struct br_mdb_entry entry; | |
260 | ||
c085c499 | 261 | memset(&entry, 0, sizeof(entry)); |
37a393bc CW |
262 | entry.ifindex = port->dev->ifindex; |
263 | entry.addr.proto = group->proto; | |
264 | entry.addr.u.ip4 = group->u.ip4; | |
265 | #if IS_ENABLED(CONFIG_IPV6) | |
266 | entry.addr.u.ip6 = group->u.ip6; | |
267 | #endif | |
09cf0211 | 268 | entry.state = state; |
74fe61f1 | 269 | entry.vid = group->vid; |
37a393bc CW |
270 | __br_mdb_notify(dev, &entry, type); |
271 | } | |
272 | ||
949f1e39 SA |
273 | static int nlmsg_populate_rtr_fill(struct sk_buff *skb, |
274 | struct net_device *dev, | |
275 | int ifindex, u32 pid, | |
276 | u32 seq, int type, unsigned int flags) | |
277 | { | |
278 | struct br_port_msg *bpm; | |
279 | struct nlmsghdr *nlh; | |
280 | struct nlattr *nest; | |
281 | ||
282 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI); | |
283 | if (!nlh) | |
284 | return -EMSGSIZE; | |
285 | ||
286 | bpm = nlmsg_data(nlh); | |
287 | memset(bpm, 0, sizeof(*bpm)); | |
288 | bpm->family = AF_BRIDGE; | |
289 | bpm->ifindex = dev->ifindex; | |
290 | nest = nla_nest_start(skb, MDBA_ROUTER); | |
291 | if (!nest) | |
292 | goto cancel; | |
293 | ||
294 | if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex)) | |
295 | goto end; | |
296 | ||
297 | nla_nest_end(skb, nest); | |
298 | nlmsg_end(skb, nlh); | |
299 | return 0; | |
300 | ||
301 | end: | |
302 | nla_nest_end(skb, nest); | |
303 | cancel: | |
304 | nlmsg_cancel(skb, nlh); | |
305 | return -EMSGSIZE; | |
306 | } | |
307 | ||
308 | static inline size_t rtnl_rtr_nlmsg_size(void) | |
309 | { | |
310 | return NLMSG_ALIGN(sizeof(struct br_port_msg)) | |
311 | + nla_total_size(sizeof(__u32)); | |
312 | } | |
313 | ||
314 | void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, | |
315 | int type) | |
316 | { | |
317 | struct net *net = dev_net(dev); | |
318 | struct sk_buff *skb; | |
319 | int err = -ENOBUFS; | |
320 | int ifindex; | |
321 | ||
322 | ifindex = port ? port->dev->ifindex : 0; | |
323 | skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC); | |
324 | if (!skb) | |
325 | goto errout; | |
326 | ||
327 | err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF); | |
328 | if (err < 0) { | |
329 | kfree_skb(skb); | |
330 | goto errout; | |
331 | } | |
332 | ||
333 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
334 | return; | |
335 | ||
336 | errout: | |
337 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
338 | } | |
339 | ||
cfd56754 CW |
340 | static bool is_valid_mdb_entry(struct br_mdb_entry *entry) |
341 | { | |
342 | if (entry->ifindex == 0) | |
343 | return false; | |
344 | ||
345 | if (entry->addr.proto == htons(ETH_P_IP)) { | |
346 | if (!ipv4_is_multicast(entry->addr.u.ip4)) | |
347 | return false; | |
348 | if (ipv4_is_local_multicast(entry->addr.u.ip4)) | |
349 | return false; | |
350 | #if IS_ENABLED(CONFIG_IPV6) | |
351 | } else if (entry->addr.proto == htons(ETH_P_IPV6)) { | |
3c3769e6 | 352 | if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6)) |
cfd56754 CW |
353 | return false; |
354 | #endif | |
355 | } else | |
356 | return false; | |
ccb1c31a AW |
357 | if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) |
358 | return false; | |
74fe61f1 NA |
359 | if (entry->vid >= VLAN_VID_MASK) |
360 | return false; | |
cfd56754 CW |
361 | |
362 | return true; | |
363 | } | |
364 | ||
365 | static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh, | |
366 | struct net_device **pdev, struct br_mdb_entry **pentry) | |
367 | { | |
368 | struct net *net = sock_net(skb->sk); | |
369 | struct br_mdb_entry *entry; | |
370 | struct br_port_msg *bpm; | |
371 | struct nlattr *tb[MDBA_SET_ENTRY_MAX+1]; | |
372 | struct net_device *dev; | |
373 | int err; | |
374 | ||
12d87251 | 375 | err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, NULL); |
cfd56754 CW |
376 | if (err < 0) |
377 | return err; | |
378 | ||
379 | bpm = nlmsg_data(nlh); | |
380 | if (bpm->ifindex == 0) { | |
381 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n"); | |
382 | return -EINVAL; | |
383 | } | |
384 | ||
385 | dev = __dev_get_by_index(net, bpm->ifindex); | |
386 | if (dev == NULL) { | |
387 | pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n"); | |
388 | return -ENODEV; | |
389 | } | |
390 | ||
391 | if (!(dev->priv_flags & IFF_EBRIDGE)) { | |
392 | pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n"); | |
393 | return -EOPNOTSUPP; | |
394 | } | |
395 | ||
396 | *pdev = dev; | |
397 | ||
398 | if (!tb[MDBA_SET_ENTRY] || | |
399 | nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) { | |
400 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n"); | |
401 | return -EINVAL; | |
402 | } | |
403 | ||
404 | entry = nla_data(tb[MDBA_SET_ENTRY]); | |
405 | if (!is_valid_mdb_entry(entry)) { | |
406 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n"); | |
407 | return -EINVAL; | |
408 | } | |
409 | ||
410 | *pentry = entry; | |
411 | return 0; | |
412 | } | |
413 | ||
414 | static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port, | |
ccb1c31a | 415 | struct br_ip *group, unsigned char state) |
cfd56754 CW |
416 | { |
417 | struct net_bridge_mdb_entry *mp; | |
418 | struct net_bridge_port_group *p; | |
419 | struct net_bridge_port_group __rcu **pp; | |
420 | struct net_bridge_mdb_htable *mdb; | |
f7e2965d | 421 | unsigned long now = jiffies; |
cfd56754 CW |
422 | int err; |
423 | ||
424 | mdb = mlock_dereference(br->mdb, br); | |
425 | mp = br_mdb_ip_get(mdb, group); | |
426 | if (!mp) { | |
427 | mp = br_multicast_new_group(br, port, group); | |
56bb7fd9 AB |
428 | err = PTR_ERR_OR_ZERO(mp); |
429 | if (err) | |
cfd56754 CW |
430 | return err; |
431 | } | |
432 | ||
433 | for (pp = &mp->ports; | |
434 | (p = mlock_dereference(*pp, br)) != NULL; | |
435 | pp = &p->next) { | |
436 | if (p->port == port) | |
437 | return -EEXIST; | |
438 | if ((unsigned long)p->port < (unsigned long)port) | |
439 | break; | |
440 | } | |
441 | ||
ccb1c31a | 442 | p = br_multicast_new_port_group(port, group, *pp, state); |
cfd56754 CW |
443 | if (unlikely(!p)) |
444 | return -ENOMEM; | |
445 | rcu_assign_pointer(*pp, p); | |
f7e2965d SA |
446 | if (state == MDB_TEMPORARY) |
447 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
cfd56754 | 448 | |
cfd56754 CW |
449 | return 0; |
450 | } | |
451 | ||
452 | static int __br_mdb_add(struct net *net, struct net_bridge *br, | |
453 | struct br_mdb_entry *entry) | |
454 | { | |
455 | struct br_ip ip; | |
456 | struct net_device *dev; | |
457 | struct net_bridge_port *p; | |
458 | int ret; | |
459 | ||
460 | if (!netif_running(br->dev) || br->multicast_disabled) | |
461 | return -EINVAL; | |
462 | ||
463 | dev = __dev_get_by_index(net, entry->ifindex); | |
464 | if (!dev) | |
465 | return -ENODEV; | |
466 | ||
467 | p = br_port_get_rtnl(dev); | |
468 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
469 | return -EINVAL; | |
470 | ||
f1158b74 | 471 | memset(&ip, 0, sizeof(ip)); |
74fe61f1 | 472 | ip.vid = entry->vid; |
cfd56754 CW |
473 | ip.proto = entry->addr.proto; |
474 | if (ip.proto == htons(ETH_P_IP)) | |
475 | ip.u.ip4 = entry->addr.u.ip4; | |
476 | #if IS_ENABLED(CONFIG_IPV6) | |
477 | else | |
478 | ip.u.ip6 = entry->addr.u.ip6; | |
479 | #endif | |
480 | ||
481 | spin_lock_bh(&br->multicast_lock); | |
ccb1c31a | 482 | ret = br_mdb_add_group(br, p, &ip, entry->state); |
cfd56754 CW |
483 | spin_unlock_bh(&br->multicast_lock); |
484 | return ret; | |
485 | } | |
486 | ||
661d2967 | 487 | static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) |
cfd56754 CW |
488 | { |
489 | struct net *net = sock_net(skb->sk); | |
2594e906 | 490 | struct net_bridge_vlan_group *vg; |
e44deb2f | 491 | struct net_device *dev, *pdev; |
cfd56754 | 492 | struct br_mdb_entry *entry; |
e44deb2f | 493 | struct net_bridge_port *p; |
2594e906 | 494 | struct net_bridge_vlan *v; |
cfd56754 CW |
495 | struct net_bridge *br; |
496 | int err; | |
497 | ||
498 | err = br_mdb_parse(skb, nlh, &dev, &entry); | |
499 | if (err < 0) | |
500 | return err; | |
501 | ||
502 | br = netdev_priv(dev); | |
503 | ||
e44deb2f SA |
504 | /* If vlan filtering is enabled and VLAN is not specified |
505 | * install mdb entry on all vlans configured on the port. | |
506 | */ | |
507 | pdev = __dev_get_by_index(net, entry->ifindex); | |
508 | if (!pdev) | |
509 | return -ENODEV; | |
510 | ||
511 | p = br_port_get_rtnl(pdev); | |
512 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
513 | return -EINVAL; | |
514 | ||
2594e906 NA |
515 | vg = nbp_vlan_group(p); |
516 | if (br_vlan_enabled(br) && vg && entry->vid == 0) { | |
517 | list_for_each_entry(v, &vg->vlan_list, vlist) { | |
518 | entry->vid = v->vid; | |
e44deb2f SA |
519 | err = __br_mdb_add(net, br, entry); |
520 | if (err) | |
521 | break; | |
522 | __br_mdb_notify(dev, entry, RTM_NEWMDB); | |
523 | } | |
524 | } else { | |
525 | err = __br_mdb_add(net, br, entry); | |
526 | if (!err) | |
527 | __br_mdb_notify(dev, entry, RTM_NEWMDB); | |
528 | } | |
529 | ||
cfd56754 CW |
530 | return err; |
531 | } | |
532 | ||
533 | static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry) | |
534 | { | |
535 | struct net_bridge_mdb_htable *mdb; | |
536 | struct net_bridge_mdb_entry *mp; | |
537 | struct net_bridge_port_group *p; | |
538 | struct net_bridge_port_group __rcu **pp; | |
539 | struct br_ip ip; | |
540 | int err = -EINVAL; | |
541 | ||
542 | if (!netif_running(br->dev) || br->multicast_disabled) | |
543 | return -EINVAL; | |
544 | ||
f1158b74 | 545 | memset(&ip, 0, sizeof(ip)); |
74fe61f1 | 546 | ip.vid = entry->vid; |
cfd56754 | 547 | ip.proto = entry->addr.proto; |
51ed7f3e | 548 | if (ip.proto == htons(ETH_P_IP)) |
cfd56754 CW |
549 | ip.u.ip4 = entry->addr.u.ip4; |
550 | #if IS_ENABLED(CONFIG_IPV6) | |
51ed7f3e | 551 | else |
cfd56754 CW |
552 | ip.u.ip6 = entry->addr.u.ip6; |
553 | #endif | |
554 | ||
555 | spin_lock_bh(&br->multicast_lock); | |
556 | mdb = mlock_dereference(br->mdb, br); | |
557 | ||
558 | mp = br_mdb_ip_get(mdb, &ip); | |
559 | if (!mp) | |
560 | goto unlock; | |
561 | ||
562 | for (pp = &mp->ports; | |
563 | (p = mlock_dereference(*pp, br)) != NULL; | |
564 | pp = &p->next) { | |
565 | if (!p->port || p->port->dev->ifindex != entry->ifindex) | |
566 | continue; | |
567 | ||
568 | if (p->port->state == BR_STATE_DISABLED) | |
569 | goto unlock; | |
570 | ||
7ae90a4f | 571 | entry->state = p->state; |
cfd56754 CW |
572 | rcu_assign_pointer(*pp, p->next); |
573 | hlist_del_init(&p->mglist); | |
574 | del_timer(&p->timer); | |
575 | call_rcu_bh(&p->rcu, br_multicast_free_pg); | |
576 | err = 0; | |
577 | ||
454594f3 | 578 | if (!mp->ports && !mp->mglist && |
cfd56754 CW |
579 | netif_running(br->dev)) |
580 | mod_timer(&mp->timer, jiffies); | |
581 | break; | |
582 | } | |
583 | ||
584 | unlock: | |
585 | spin_unlock_bh(&br->multicast_lock); | |
586 | return err; | |
587 | } | |
588 | ||
661d2967 | 589 | static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) |
cfd56754 | 590 | { |
e44deb2f | 591 | struct net *net = sock_net(skb->sk); |
2594e906 | 592 | struct net_bridge_vlan_group *vg; |
e44deb2f | 593 | struct net_device *dev, *pdev; |
cfd56754 | 594 | struct br_mdb_entry *entry; |
e44deb2f | 595 | struct net_bridge_port *p; |
2594e906 | 596 | struct net_bridge_vlan *v; |
cfd56754 CW |
597 | struct net_bridge *br; |
598 | int err; | |
599 | ||
600 | err = br_mdb_parse(skb, nlh, &dev, &entry); | |
601 | if (err < 0) | |
602 | return err; | |
603 | ||
604 | br = netdev_priv(dev); | |
605 | ||
e44deb2f SA |
606 | /* If vlan filtering is enabled and VLAN is not specified |
607 | * delete mdb entry on all vlans configured on the port. | |
608 | */ | |
609 | pdev = __dev_get_by_index(net, entry->ifindex); | |
610 | if (!pdev) | |
611 | return -ENODEV; | |
612 | ||
613 | p = br_port_get_rtnl(pdev); | |
614 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
615 | return -EINVAL; | |
616 | ||
2594e906 NA |
617 | vg = nbp_vlan_group(p); |
618 | if (br_vlan_enabled(br) && vg && entry->vid == 0) { | |
619 | list_for_each_entry(v, &vg->vlan_list, vlist) { | |
620 | entry->vid = v->vid; | |
e44deb2f SA |
621 | err = __br_mdb_del(br, entry); |
622 | if (!err) | |
623 | __br_mdb_notify(dev, entry, RTM_DELMDB); | |
624 | } | |
625 | } else { | |
626 | err = __br_mdb_del(br, entry); | |
627 | if (!err) | |
628 | __br_mdb_notify(dev, entry, RTM_DELMDB); | |
629 | } | |
630 | ||
cfd56754 CW |
631 | return err; |
632 | } | |
633 | ||
ee07c6e7 CW |
634 | void br_mdb_init(void) |
635 | { | |
636 | rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, NULL); | |
cfd56754 CW |
637 | rtnl_register(PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, NULL); |
638 | rtnl_register(PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, NULL); | |
ee07c6e7 | 639 | } |
63233159 VY |
640 | |
641 | void br_mdb_uninit(void) | |
642 | { | |
643 | rtnl_unregister(PF_BRIDGE, RTM_GETMDB); | |
644 | rtnl_unregister(PF_BRIDGE, RTM_NEWMDB); | |
645 | rtnl_unregister(PF_BRIDGE, RTM_DELMDB); | |
646 | } |