Commit | Line | Data |
---|---|---|
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 | ||
9d06b6d8 ER |
44 | static void __mdb_entry_fill_flags(struct br_mdb_entry *e, unsigned char flags) |
45 | { | |
46 | e->state = flags & MDB_PG_FLAGS_PERMANENT; | |
47 | e->flags = 0; | |
48 | if (flags & MDB_PG_FLAGS_OFFLOAD) | |
49 | e->flags |= MDB_FLAGS_OFFLOAD; | |
50 | } | |
51 | ||
ee07c6e7 CW |
52 | static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb, |
53 | struct net_device *dev) | |
54 | { | |
55 | struct net_bridge *br = netdev_priv(dev); | |
56 | struct net_bridge_mdb_htable *mdb; | |
57 | struct nlattr *nest, *nest2; | |
58 | int i, err = 0; | |
59 | int idx = 0, s_idx = cb->args[1]; | |
60 | ||
61 | if (br->multicast_disabled) | |
62 | return 0; | |
63 | ||
64 | mdb = rcu_dereference(br->mdb); | |
65 | if (!mdb) | |
66 | return 0; | |
67 | ||
68 | nest = nla_nest_start(skb, MDBA_MDB); | |
69 | if (nest == NULL) | |
70 | return -EMSGSIZE; | |
71 | ||
72 | for (i = 0; i < mdb->max; i++) { | |
ee07c6e7 | 73 | struct net_bridge_mdb_entry *mp; |
762a3d89 | 74 | struct net_bridge_port_group *p; |
75 | struct net_bridge_port_group __rcu **pp; | |
ee07c6e7 CW |
76 | struct net_bridge_port *port; |
77 | ||
b67bfe0d | 78 | hlist_for_each_entry_rcu(mp, &mdb->mhash[i], hlist[mdb->ver]) { |
ee07c6e7 CW |
79 | if (idx < s_idx) |
80 | goto skip; | |
81 | ||
82 | nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY); | |
83 | if (nest2 == NULL) { | |
84 | err = -EMSGSIZE; | |
85 | goto out; | |
86 | } | |
87 | ||
88 | for (pp = &mp->ports; | |
89 | (p = rcu_dereference(*pp)) != NULL; | |
90 | pp = &p->next) { | |
91 | port = p->port; | |
92 | if (port) { | |
93 | struct br_mdb_entry e; | |
c085c499 | 94 | memset(&e, 0, sizeof(e)); |
ee07c6e7 | 95 | e.ifindex = port->dev->ifindex; |
74fe61f1 | 96 | e.vid = p->addr.vid; |
9d06b6d8 | 97 | __mdb_entry_fill_flags(&e, p->flags); |
09d7cf7d VY |
98 | if (p->addr.proto == htons(ETH_P_IP)) |
99 | e.addr.u.ip4 = p->addr.u.ip4; | |
ee07c6e7 | 100 | #if IS_ENABLED(CONFIG_IPV6) |
09d7cf7d VY |
101 | if (p->addr.proto == htons(ETH_P_IPV6)) |
102 | e.addr.u.ip6 = p->addr.u.ip6; | |
ee07c6e7 CW |
103 | #endif |
104 | e.addr.proto = p->addr.proto; | |
105 | if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(e), &e)) { | |
106 | nla_nest_cancel(skb, nest2); | |
107 | err = -EMSGSIZE; | |
108 | goto out; | |
109 | } | |
110 | } | |
111 | } | |
112 | nla_nest_end(skb, nest2); | |
113 | skip: | |
114 | idx++; | |
115 | } | |
116 | } | |
117 | ||
118 | out: | |
119 | cb->args[1] = idx; | |
120 | nla_nest_end(skb, nest); | |
121 | return err; | |
122 | } | |
123 | ||
124 | static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
125 | { | |
126 | struct net_device *dev; | |
127 | struct net *net = sock_net(skb->sk); | |
128 | struct nlmsghdr *nlh = NULL; | |
129 | int idx = 0, s_idx; | |
130 | ||
131 | s_idx = cb->args[0]; | |
132 | ||
133 | rcu_read_lock(); | |
134 | ||
2ce297fc CW |
135 | /* In theory this could be wrapped to 0... */ |
136 | cb->seq = net->dev_base_seq + br_mdb_rehash_seq; | |
ee07c6e7 CW |
137 | |
138 | for_each_netdev_rcu(net, dev) { | |
139 | if (dev->priv_flags & IFF_EBRIDGE) { | |
140 | struct br_port_msg *bpm; | |
141 | ||
142 | if (idx < s_idx) | |
143 | goto skip; | |
144 | ||
145 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
146 | cb->nlh->nlmsg_seq, RTM_GETMDB, | |
147 | sizeof(*bpm), NLM_F_MULTI); | |
148 | if (nlh == NULL) | |
149 | break; | |
150 | ||
151 | bpm = nlmsg_data(nlh); | |
c085c499 | 152 | memset(bpm, 0, sizeof(*bpm)); |
ee07c6e7 CW |
153 | bpm->ifindex = dev->ifindex; |
154 | if (br_mdb_fill_info(skb, cb, dev) < 0) | |
155 | goto out; | |
156 | if (br_rports_fill_info(skb, cb, dev) < 0) | |
157 | goto out; | |
158 | ||
159 | cb->args[1] = 0; | |
160 | nlmsg_end(skb, nlh); | |
161 | skip: | |
162 | idx++; | |
163 | } | |
164 | } | |
165 | ||
166 | out: | |
167 | if (nlh) | |
168 | nlmsg_end(skb, nlh); | |
169 | rcu_read_unlock(); | |
170 | cb->args[0] = idx; | |
171 | return skb->len; | |
172 | } | |
173 | ||
37a393bc CW |
174 | static int nlmsg_populate_mdb_fill(struct sk_buff *skb, |
175 | struct net_device *dev, | |
176 | struct br_mdb_entry *entry, u32 pid, | |
177 | u32 seq, int type, unsigned int flags) | |
178 | { | |
179 | struct nlmsghdr *nlh; | |
180 | struct br_port_msg *bpm; | |
181 | struct nlattr *nest, *nest2; | |
182 | ||
82199679 | 183 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0); |
37a393bc CW |
184 | if (!nlh) |
185 | return -EMSGSIZE; | |
186 | ||
187 | bpm = nlmsg_data(nlh); | |
c085c499 | 188 | memset(bpm, 0, sizeof(*bpm)); |
37a393bc CW |
189 | bpm->family = AF_BRIDGE; |
190 | bpm->ifindex = dev->ifindex; | |
191 | nest = nla_nest_start(skb, MDBA_MDB); | |
192 | if (nest == NULL) | |
193 | goto cancel; | |
194 | nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY); | |
195 | if (nest2 == NULL) | |
196 | goto end; | |
197 | ||
198 | if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry)) | |
199 | goto end; | |
200 | ||
201 | nla_nest_end(skb, nest2); | |
202 | nla_nest_end(skb, nest); | |
053c095a JB |
203 | nlmsg_end(skb, nlh); |
204 | return 0; | |
37a393bc CW |
205 | |
206 | end: | |
207 | nla_nest_end(skb, nest); | |
208 | cancel: | |
209 | nlmsg_cancel(skb, nlh); | |
210 | return -EMSGSIZE; | |
211 | } | |
212 | ||
213 | static inline size_t rtnl_mdb_nlmsg_size(void) | |
214 | { | |
215 | return NLMSG_ALIGN(sizeof(struct br_port_msg)) | |
216 | + nla_total_size(sizeof(struct br_mdb_entry)); | |
217 | } | |
218 | ||
219 | static void __br_mdb_notify(struct net_device *dev, struct br_mdb_entry *entry, | |
220 | int type) | |
221 | { | |
f1fecb1d ER |
222 | struct switchdev_obj_port_mdb mdb = { |
223 | .obj = { | |
224 | .id = SWITCHDEV_OBJ_ID_PORT_MDB, | |
225 | .flags = SWITCHDEV_F_DEFER, | |
226 | }, | |
227 | .vid = entry->vid, | |
228 | }; | |
229 | struct net_device *port_dev; | |
37a393bc CW |
230 | struct net *net = dev_net(dev); |
231 | struct sk_buff *skb; | |
232 | int err = -ENOBUFS; | |
233 | ||
f1fecb1d ER |
234 | port_dev = __dev_get_by_index(net, entry->ifindex); |
235 | if (entry->addr.proto == htons(ETH_P_IP)) | |
236 | ip_eth_mc_map(entry->addr.u.ip4, mdb.addr); | |
237 | #if IS_ENABLED(CONFIG_IPV6) | |
238 | else | |
239 | ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr); | |
240 | #endif | |
241 | ||
242 | mdb.obj.orig_dev = port_dev; | |
243 | if (port_dev && type == RTM_NEWMDB) | |
244 | switchdev_port_obj_add(port_dev, &mdb.obj); | |
245 | else if (port_dev && type == RTM_DELMDB) | |
246 | switchdev_port_obj_del(port_dev, &mdb.obj); | |
247 | ||
37a393bc CW |
248 | skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC); |
249 | if (!skb) | |
250 | goto errout; | |
251 | ||
252 | err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF); | |
253 | if (err < 0) { | |
254 | kfree_skb(skb); | |
255 | goto errout; | |
256 | } | |
257 | ||
258 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
259 | return; | |
260 | errout: | |
261 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
262 | } | |
263 | ||
264 | void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, | |
9d06b6d8 | 265 | struct br_ip *group, int type, u8 flags) |
37a393bc CW |
266 | { |
267 | struct br_mdb_entry entry; | |
268 | ||
c085c499 | 269 | memset(&entry, 0, sizeof(entry)); |
37a393bc CW |
270 | entry.ifindex = port->dev->ifindex; |
271 | entry.addr.proto = group->proto; | |
272 | entry.addr.u.ip4 = group->u.ip4; | |
273 | #if IS_ENABLED(CONFIG_IPV6) | |
274 | entry.addr.u.ip6 = group->u.ip6; | |
275 | #endif | |
74fe61f1 | 276 | entry.vid = group->vid; |
9d06b6d8 | 277 | __mdb_entry_fill_flags(&entry, flags); |
37a393bc CW |
278 | __br_mdb_notify(dev, &entry, type); |
279 | } | |
280 | ||
949f1e39 SA |
281 | static int nlmsg_populate_rtr_fill(struct sk_buff *skb, |
282 | struct net_device *dev, | |
283 | int ifindex, u32 pid, | |
284 | u32 seq, int type, unsigned int flags) | |
285 | { | |
286 | struct br_port_msg *bpm; | |
287 | struct nlmsghdr *nlh; | |
288 | struct nlattr *nest; | |
289 | ||
290 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI); | |
291 | if (!nlh) | |
292 | return -EMSGSIZE; | |
293 | ||
294 | bpm = nlmsg_data(nlh); | |
295 | memset(bpm, 0, sizeof(*bpm)); | |
296 | bpm->family = AF_BRIDGE; | |
297 | bpm->ifindex = dev->ifindex; | |
298 | nest = nla_nest_start(skb, MDBA_ROUTER); | |
299 | if (!nest) | |
300 | goto cancel; | |
301 | ||
302 | if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex)) | |
303 | goto end; | |
304 | ||
305 | nla_nest_end(skb, nest); | |
306 | nlmsg_end(skb, nlh); | |
307 | return 0; | |
308 | ||
309 | end: | |
310 | nla_nest_end(skb, nest); | |
311 | cancel: | |
312 | nlmsg_cancel(skb, nlh); | |
313 | return -EMSGSIZE; | |
314 | } | |
315 | ||
316 | static inline size_t rtnl_rtr_nlmsg_size(void) | |
317 | { | |
318 | return NLMSG_ALIGN(sizeof(struct br_port_msg)) | |
319 | + nla_total_size(sizeof(__u32)); | |
320 | } | |
321 | ||
322 | void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, | |
323 | int type) | |
324 | { | |
325 | struct net *net = dev_net(dev); | |
326 | struct sk_buff *skb; | |
327 | int err = -ENOBUFS; | |
328 | int ifindex; | |
329 | ||
330 | ifindex = port ? port->dev->ifindex : 0; | |
331 | skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC); | |
332 | if (!skb) | |
333 | goto errout; | |
334 | ||
335 | err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF); | |
336 | if (err < 0) { | |
337 | kfree_skb(skb); | |
338 | goto errout; | |
339 | } | |
340 | ||
341 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
342 | return; | |
343 | ||
344 | errout: | |
345 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
346 | } | |
347 | ||
cfd56754 CW |
348 | static bool is_valid_mdb_entry(struct br_mdb_entry *entry) |
349 | { | |
350 | if (entry->ifindex == 0) | |
351 | return false; | |
352 | ||
353 | if (entry->addr.proto == htons(ETH_P_IP)) { | |
354 | if (!ipv4_is_multicast(entry->addr.u.ip4)) | |
355 | return false; | |
356 | if (ipv4_is_local_multicast(entry->addr.u.ip4)) | |
357 | return false; | |
358 | #if IS_ENABLED(CONFIG_IPV6) | |
359 | } else if (entry->addr.proto == htons(ETH_P_IPV6)) { | |
3c3769e6 | 360 | if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6)) |
cfd56754 CW |
361 | return false; |
362 | #endif | |
363 | } else | |
364 | return false; | |
ccb1c31a AW |
365 | if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) |
366 | return false; | |
74fe61f1 NA |
367 | if (entry->vid >= VLAN_VID_MASK) |
368 | return false; | |
cfd56754 CW |
369 | |
370 | return true; | |
371 | } | |
372 | ||
373 | static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh, | |
374 | struct net_device **pdev, struct br_mdb_entry **pentry) | |
375 | { | |
376 | struct net *net = sock_net(skb->sk); | |
377 | struct br_mdb_entry *entry; | |
378 | struct br_port_msg *bpm; | |
379 | struct nlattr *tb[MDBA_SET_ENTRY_MAX+1]; | |
380 | struct net_device *dev; | |
381 | int err; | |
382 | ||
12d87251 | 383 | err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, NULL); |
cfd56754 CW |
384 | if (err < 0) |
385 | return err; | |
386 | ||
387 | bpm = nlmsg_data(nlh); | |
388 | if (bpm->ifindex == 0) { | |
389 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n"); | |
390 | return -EINVAL; | |
391 | } | |
392 | ||
393 | dev = __dev_get_by_index(net, bpm->ifindex); | |
394 | if (dev == NULL) { | |
395 | pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n"); | |
396 | return -ENODEV; | |
397 | } | |
398 | ||
399 | if (!(dev->priv_flags & IFF_EBRIDGE)) { | |
400 | pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n"); | |
401 | return -EOPNOTSUPP; | |
402 | } | |
403 | ||
404 | *pdev = dev; | |
405 | ||
406 | if (!tb[MDBA_SET_ENTRY] || | |
407 | nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) { | |
408 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n"); | |
409 | return -EINVAL; | |
410 | } | |
411 | ||
412 | entry = nla_data(tb[MDBA_SET_ENTRY]); | |
413 | if (!is_valid_mdb_entry(entry)) { | |
414 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n"); | |
415 | return -EINVAL; | |
416 | } | |
417 | ||
418 | *pentry = entry; | |
419 | return 0; | |
420 | } | |
421 | ||
422 | static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port, | |
ccb1c31a | 423 | struct br_ip *group, unsigned char state) |
cfd56754 CW |
424 | { |
425 | struct net_bridge_mdb_entry *mp; | |
426 | struct net_bridge_port_group *p; | |
427 | struct net_bridge_port_group __rcu **pp; | |
428 | struct net_bridge_mdb_htable *mdb; | |
f7e2965d | 429 | unsigned long now = jiffies; |
cfd56754 CW |
430 | int err; |
431 | ||
432 | mdb = mlock_dereference(br->mdb, br); | |
433 | mp = br_mdb_ip_get(mdb, group); | |
434 | if (!mp) { | |
435 | mp = br_multicast_new_group(br, port, group); | |
436 | err = PTR_ERR(mp); | |
437 | if (IS_ERR(mp)) | |
438 | return err; | |
439 | } | |
440 | ||
441 | for (pp = &mp->ports; | |
442 | (p = mlock_dereference(*pp, br)) != NULL; | |
443 | pp = &p->next) { | |
444 | if (p->port == port) | |
445 | return -EEXIST; | |
446 | if ((unsigned long)p->port < (unsigned long)port) | |
447 | break; | |
448 | } | |
449 | ||
ccb1c31a | 450 | p = br_multicast_new_port_group(port, group, *pp, state); |
cfd56754 CW |
451 | if (unlikely(!p)) |
452 | return -ENOMEM; | |
453 | rcu_assign_pointer(*pp, p); | |
f7e2965d SA |
454 | if (state == MDB_TEMPORARY) |
455 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
cfd56754 | 456 | |
cfd56754 CW |
457 | return 0; |
458 | } | |
459 | ||
460 | static int __br_mdb_add(struct net *net, struct net_bridge *br, | |
461 | struct br_mdb_entry *entry) | |
462 | { | |
463 | struct br_ip ip; | |
464 | struct net_device *dev; | |
465 | struct net_bridge_port *p; | |
466 | int ret; | |
467 | ||
468 | if (!netif_running(br->dev) || br->multicast_disabled) | |
469 | return -EINVAL; | |
470 | ||
471 | dev = __dev_get_by_index(net, entry->ifindex); | |
472 | if (!dev) | |
473 | return -ENODEV; | |
474 | ||
475 | p = br_port_get_rtnl(dev); | |
476 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
477 | return -EINVAL; | |
478 | ||
f1158b74 | 479 | memset(&ip, 0, sizeof(ip)); |
74fe61f1 | 480 | ip.vid = entry->vid; |
cfd56754 CW |
481 | ip.proto = entry->addr.proto; |
482 | if (ip.proto == htons(ETH_P_IP)) | |
483 | ip.u.ip4 = entry->addr.u.ip4; | |
484 | #if IS_ENABLED(CONFIG_IPV6) | |
485 | else | |
486 | ip.u.ip6 = entry->addr.u.ip6; | |
487 | #endif | |
488 | ||
489 | spin_lock_bh(&br->multicast_lock); | |
ccb1c31a | 490 | ret = br_mdb_add_group(br, p, &ip, entry->state); |
cfd56754 CW |
491 | spin_unlock_bh(&br->multicast_lock); |
492 | return ret; | |
493 | } | |
494 | ||
661d2967 | 495 | static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) |
cfd56754 CW |
496 | { |
497 | struct net *net = sock_net(skb->sk); | |
2594e906 | 498 | struct net_bridge_vlan_group *vg; |
e44deb2f | 499 | struct net_device *dev, *pdev; |
cfd56754 | 500 | struct br_mdb_entry *entry; |
e44deb2f | 501 | struct net_bridge_port *p; |
2594e906 | 502 | struct net_bridge_vlan *v; |
cfd56754 CW |
503 | struct net_bridge *br; |
504 | int err; | |
505 | ||
506 | err = br_mdb_parse(skb, nlh, &dev, &entry); | |
507 | if (err < 0) | |
508 | return err; | |
509 | ||
510 | br = netdev_priv(dev); | |
511 | ||
e44deb2f SA |
512 | /* If vlan filtering is enabled and VLAN is not specified |
513 | * install mdb entry on all vlans configured on the port. | |
514 | */ | |
515 | pdev = __dev_get_by_index(net, entry->ifindex); | |
516 | if (!pdev) | |
517 | return -ENODEV; | |
518 | ||
519 | p = br_port_get_rtnl(pdev); | |
520 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
521 | return -EINVAL; | |
522 | ||
2594e906 NA |
523 | vg = nbp_vlan_group(p); |
524 | if (br_vlan_enabled(br) && vg && entry->vid == 0) { | |
525 | list_for_each_entry(v, &vg->vlan_list, vlist) { | |
526 | entry->vid = v->vid; | |
e44deb2f SA |
527 | err = __br_mdb_add(net, br, entry); |
528 | if (err) | |
529 | break; | |
530 | __br_mdb_notify(dev, entry, RTM_NEWMDB); | |
531 | } | |
532 | } else { | |
533 | err = __br_mdb_add(net, br, entry); | |
534 | if (!err) | |
535 | __br_mdb_notify(dev, entry, RTM_NEWMDB); | |
536 | } | |
537 | ||
cfd56754 CW |
538 | return err; |
539 | } | |
540 | ||
541 | static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry) | |
542 | { | |
543 | struct net_bridge_mdb_htable *mdb; | |
544 | struct net_bridge_mdb_entry *mp; | |
545 | struct net_bridge_port_group *p; | |
546 | struct net_bridge_port_group __rcu **pp; | |
547 | struct br_ip ip; | |
548 | int err = -EINVAL; | |
549 | ||
550 | if (!netif_running(br->dev) || br->multicast_disabled) | |
551 | return -EINVAL; | |
552 | ||
f1158b74 | 553 | memset(&ip, 0, sizeof(ip)); |
74fe61f1 | 554 | ip.vid = entry->vid; |
cfd56754 | 555 | ip.proto = entry->addr.proto; |
51ed7f3e | 556 | if (ip.proto == htons(ETH_P_IP)) |
cfd56754 CW |
557 | ip.u.ip4 = entry->addr.u.ip4; |
558 | #if IS_ENABLED(CONFIG_IPV6) | |
51ed7f3e | 559 | else |
cfd56754 CW |
560 | ip.u.ip6 = entry->addr.u.ip6; |
561 | #endif | |
562 | ||
563 | spin_lock_bh(&br->multicast_lock); | |
564 | mdb = mlock_dereference(br->mdb, br); | |
565 | ||
566 | mp = br_mdb_ip_get(mdb, &ip); | |
567 | if (!mp) | |
568 | goto unlock; | |
569 | ||
570 | for (pp = &mp->ports; | |
571 | (p = mlock_dereference(*pp, br)) != NULL; | |
572 | pp = &p->next) { | |
573 | if (!p->port || p->port->dev->ifindex != entry->ifindex) | |
574 | continue; | |
575 | ||
576 | if (p->port->state == BR_STATE_DISABLED) | |
577 | goto unlock; | |
578 | ||
9d06b6d8 | 579 | __mdb_entry_fill_flags(entry, p->flags); |
cfd56754 CW |
580 | rcu_assign_pointer(*pp, p->next); |
581 | hlist_del_init(&p->mglist); | |
582 | del_timer(&p->timer); | |
583 | call_rcu_bh(&p->rcu, br_multicast_free_pg); | |
584 | err = 0; | |
585 | ||
454594f3 | 586 | if (!mp->ports && !mp->mglist && |
cfd56754 CW |
587 | netif_running(br->dev)) |
588 | mod_timer(&mp->timer, jiffies); | |
589 | break; | |
590 | } | |
591 | ||
592 | unlock: | |
593 | spin_unlock_bh(&br->multicast_lock); | |
594 | return err; | |
595 | } | |
596 | ||
661d2967 | 597 | static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) |
cfd56754 | 598 | { |
e44deb2f | 599 | struct net *net = sock_net(skb->sk); |
2594e906 | 600 | struct net_bridge_vlan_group *vg; |
e44deb2f | 601 | struct net_device *dev, *pdev; |
cfd56754 | 602 | struct br_mdb_entry *entry; |
e44deb2f | 603 | struct net_bridge_port *p; |
2594e906 | 604 | struct net_bridge_vlan *v; |
cfd56754 CW |
605 | struct net_bridge *br; |
606 | int err; | |
607 | ||
608 | err = br_mdb_parse(skb, nlh, &dev, &entry); | |
609 | if (err < 0) | |
610 | return err; | |
611 | ||
612 | br = netdev_priv(dev); | |
613 | ||
e44deb2f SA |
614 | /* If vlan filtering is enabled and VLAN is not specified |
615 | * delete mdb entry on all vlans configured on the port. | |
616 | */ | |
617 | pdev = __dev_get_by_index(net, entry->ifindex); | |
618 | if (!pdev) | |
619 | return -ENODEV; | |
620 | ||
621 | p = br_port_get_rtnl(pdev); | |
622 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
623 | return -EINVAL; | |
624 | ||
2594e906 NA |
625 | vg = nbp_vlan_group(p); |
626 | if (br_vlan_enabled(br) && vg && entry->vid == 0) { | |
627 | list_for_each_entry(v, &vg->vlan_list, vlist) { | |
628 | entry->vid = v->vid; | |
e44deb2f SA |
629 | err = __br_mdb_del(br, entry); |
630 | if (!err) | |
631 | __br_mdb_notify(dev, entry, RTM_DELMDB); | |
632 | } | |
633 | } else { | |
634 | err = __br_mdb_del(br, entry); | |
635 | if (!err) | |
636 | __br_mdb_notify(dev, entry, RTM_DELMDB); | |
637 | } | |
638 | ||
cfd56754 CW |
639 | return err; |
640 | } | |
641 | ||
ee07c6e7 CW |
642 | void br_mdb_init(void) |
643 | { | |
644 | rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, NULL); | |
cfd56754 CW |
645 | rtnl_register(PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, NULL); |
646 | rtnl_register(PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, NULL); | |
ee07c6e7 | 647 | } |
63233159 VY |
648 | |
649 | void br_mdb_uninit(void) | |
650 | { | |
651 | rtnl_unregister(PF_BRIDGE, RTM_GETMDB); | |
652 | rtnl_unregister(PF_BRIDGE, RTM_NEWMDB); | |
653 | rtnl_unregister(PF_BRIDGE, RTM_DELMDB); | |
654 | } |