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; | |
59f78f9f | 23 | struct nlattr *nest, *port_nest; |
ee07c6e7 CW |
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) { |
59f78f9f NA |
33 | if (!p) |
34 | continue; | |
35 | port_nest = nla_nest_start(skb, MDBA_ROUTER_PORT); | |
36 | if (!port_nest) | |
ee07c6e7 | 37 | goto fail; |
59f78f9f NA |
38 | if (nla_put_nohdr(skb, sizeof(u32), &p->dev->ifindex) || |
39 | nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER, | |
40 | br_timer_value(&p->multicast_router_timer)) || | |
41 | nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE, | |
42 | p->multicast_router)) { | |
43 | nla_nest_cancel(skb, port_nest); | |
44 | goto fail; | |
45 | } | |
46 | nla_nest_end(skb, port_nest); | |
ee07c6e7 CW |
47 | } |
48 | ||
49 | nla_nest_end(skb, nest); | |
50 | return 0; | |
51 | fail: | |
52 | nla_nest_cancel(skb, nest); | |
53 | return -EMSGSIZE; | |
54 | } | |
55 | ||
9d06b6d8 ER |
56 | static void __mdb_entry_fill_flags(struct br_mdb_entry *e, unsigned char flags) |
57 | { | |
58 | e->state = flags & MDB_PG_FLAGS_PERMANENT; | |
59 | e->flags = 0; | |
60 | if (flags & MDB_PG_FLAGS_OFFLOAD) | |
61 | e->flags |= MDB_FLAGS_OFFLOAD; | |
62 | } | |
63 | ||
ee07c6e7 CW |
64 | static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb, |
65 | struct net_device *dev) | |
66 | { | |
67 | struct net_bridge *br = netdev_priv(dev); | |
68 | struct net_bridge_mdb_htable *mdb; | |
69 | struct nlattr *nest, *nest2; | |
70 | int i, err = 0; | |
71 | int idx = 0, s_idx = cb->args[1]; | |
72 | ||
73 | if (br->multicast_disabled) | |
74 | return 0; | |
75 | ||
76 | mdb = rcu_dereference(br->mdb); | |
77 | if (!mdb) | |
78 | return 0; | |
79 | ||
80 | nest = nla_nest_start(skb, MDBA_MDB); | |
81 | if (nest == NULL) | |
82 | return -EMSGSIZE; | |
83 | ||
84 | for (i = 0; i < mdb->max; i++) { | |
ee07c6e7 | 85 | struct net_bridge_mdb_entry *mp; |
762a3d89 | 86 | struct net_bridge_port_group *p; |
87 | struct net_bridge_port_group __rcu **pp; | |
ee07c6e7 CW |
88 | struct net_bridge_port *port; |
89 | ||
b67bfe0d | 90 | hlist_for_each_entry_rcu(mp, &mdb->mhash[i], hlist[mdb->ver]) { |
ee07c6e7 CW |
91 | if (idx < s_idx) |
92 | goto skip; | |
93 | ||
94 | nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY); | |
95 | if (nest2 == NULL) { | |
96 | err = -EMSGSIZE; | |
97 | goto out; | |
98 | } | |
99 | ||
100 | for (pp = &mp->ports; | |
101 | (p = rcu_dereference(*pp)) != NULL; | |
102 | pp = &p->next) { | |
21257156 | 103 | struct nlattr *nest_ent; |
76cc173d NA |
104 | struct br_mdb_entry e; |
105 | ||
ee07c6e7 | 106 | port = p->port; |
76cc173d NA |
107 | if (!port) |
108 | continue; | |
21257156 | 109 | |
76cc173d NA |
110 | memset(&e, 0, sizeof(e)); |
111 | e.ifindex = port->dev->ifindex; | |
112 | e.vid = p->addr.vid; | |
113 | __mdb_entry_fill_flags(&e, p->flags); | |
114 | if (p->addr.proto == htons(ETH_P_IP)) | |
115 | e.addr.u.ip4 = p->addr.u.ip4; | |
ee07c6e7 | 116 | #if IS_ENABLED(CONFIG_IPV6) |
76cc173d NA |
117 | if (p->addr.proto == htons(ETH_P_IPV6)) |
118 | e.addr.u.ip6 = p->addr.u.ip6; | |
ee07c6e7 | 119 | #endif |
76cc173d | 120 | e.addr.proto = p->addr.proto; |
21257156 NA |
121 | nest_ent = nla_nest_start(skb, |
122 | MDBA_MDB_ENTRY_INFO); | |
123 | if (!nest_ent) { | |
124 | nla_nest_cancel(skb, nest2); | |
125 | err = -EMSGSIZE; | |
126 | goto out; | |
127 | } | |
128 | if (nla_put_nohdr(skb, sizeof(e), &e) || | |
129 | nla_put_u32(skb, | |
130 | MDBA_MDB_EATTR_TIMER, | |
131 | br_timer_value(&p->timer))) { | |
132 | nla_nest_cancel(skb, nest_ent); | |
76cc173d NA |
133 | nla_nest_cancel(skb, nest2); |
134 | err = -EMSGSIZE; | |
135 | goto out; | |
ee07c6e7 | 136 | } |
21257156 | 137 | nla_nest_end(skb, nest_ent); |
ee07c6e7 CW |
138 | } |
139 | nla_nest_end(skb, nest2); | |
140 | skip: | |
141 | idx++; | |
142 | } | |
143 | } | |
144 | ||
145 | out: | |
146 | cb->args[1] = idx; | |
147 | nla_nest_end(skb, nest); | |
148 | return err; | |
149 | } | |
150 | ||
151 | static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
152 | { | |
153 | struct net_device *dev; | |
154 | struct net *net = sock_net(skb->sk); | |
155 | struct nlmsghdr *nlh = NULL; | |
156 | int idx = 0, s_idx; | |
157 | ||
158 | s_idx = cb->args[0]; | |
159 | ||
160 | rcu_read_lock(); | |
161 | ||
2ce297fc CW |
162 | /* In theory this could be wrapped to 0... */ |
163 | cb->seq = net->dev_base_seq + br_mdb_rehash_seq; | |
ee07c6e7 CW |
164 | |
165 | for_each_netdev_rcu(net, dev) { | |
166 | if (dev->priv_flags & IFF_EBRIDGE) { | |
167 | struct br_port_msg *bpm; | |
168 | ||
169 | if (idx < s_idx) | |
170 | goto skip; | |
171 | ||
172 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
173 | cb->nlh->nlmsg_seq, RTM_GETMDB, | |
174 | sizeof(*bpm), NLM_F_MULTI); | |
175 | if (nlh == NULL) | |
176 | break; | |
177 | ||
178 | bpm = nlmsg_data(nlh); | |
c085c499 | 179 | memset(bpm, 0, sizeof(*bpm)); |
ee07c6e7 CW |
180 | bpm->ifindex = dev->ifindex; |
181 | if (br_mdb_fill_info(skb, cb, dev) < 0) | |
182 | goto out; | |
183 | if (br_rports_fill_info(skb, cb, dev) < 0) | |
184 | goto out; | |
185 | ||
186 | cb->args[1] = 0; | |
187 | nlmsg_end(skb, nlh); | |
188 | skip: | |
189 | idx++; | |
190 | } | |
191 | } | |
192 | ||
193 | out: | |
194 | if (nlh) | |
195 | nlmsg_end(skb, nlh); | |
196 | rcu_read_unlock(); | |
197 | cb->args[0] = idx; | |
198 | return skb->len; | |
199 | } | |
200 | ||
37a393bc CW |
201 | static int nlmsg_populate_mdb_fill(struct sk_buff *skb, |
202 | struct net_device *dev, | |
203 | struct br_mdb_entry *entry, u32 pid, | |
204 | u32 seq, int type, unsigned int flags) | |
205 | { | |
206 | struct nlmsghdr *nlh; | |
207 | struct br_port_msg *bpm; | |
208 | struct nlattr *nest, *nest2; | |
209 | ||
82199679 | 210 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0); |
37a393bc CW |
211 | if (!nlh) |
212 | return -EMSGSIZE; | |
213 | ||
214 | bpm = nlmsg_data(nlh); | |
c085c499 | 215 | memset(bpm, 0, sizeof(*bpm)); |
37a393bc CW |
216 | bpm->family = AF_BRIDGE; |
217 | bpm->ifindex = dev->ifindex; | |
218 | nest = nla_nest_start(skb, MDBA_MDB); | |
219 | if (nest == NULL) | |
220 | goto cancel; | |
221 | nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY); | |
222 | if (nest2 == NULL) | |
223 | goto end; | |
224 | ||
225 | if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry)) | |
226 | goto end; | |
227 | ||
228 | nla_nest_end(skb, nest2); | |
229 | nla_nest_end(skb, nest); | |
053c095a JB |
230 | nlmsg_end(skb, nlh); |
231 | return 0; | |
37a393bc CW |
232 | |
233 | end: | |
234 | nla_nest_end(skb, nest); | |
235 | cancel: | |
236 | nlmsg_cancel(skb, nlh); | |
237 | return -EMSGSIZE; | |
238 | } | |
239 | ||
240 | static inline size_t rtnl_mdb_nlmsg_size(void) | |
241 | { | |
242 | return NLMSG_ALIGN(sizeof(struct br_port_msg)) | |
243 | + nla_total_size(sizeof(struct br_mdb_entry)); | |
244 | } | |
245 | ||
246 | static void __br_mdb_notify(struct net_device *dev, struct br_mdb_entry *entry, | |
9e8430f8 | 247 | int type, struct net_bridge_port_group *pg) |
37a393bc | 248 | { |
f1fecb1d ER |
249 | struct switchdev_obj_port_mdb mdb = { |
250 | .obj = { | |
251 | .id = SWITCHDEV_OBJ_ID_PORT_MDB, | |
252 | .flags = SWITCHDEV_F_DEFER, | |
253 | }, | |
254 | .vid = entry->vid, | |
255 | }; | |
256 | struct net_device *port_dev; | |
37a393bc CW |
257 | struct net *net = dev_net(dev); |
258 | struct sk_buff *skb; | |
259 | int err = -ENOBUFS; | |
260 | ||
f1fecb1d ER |
261 | port_dev = __dev_get_by_index(net, entry->ifindex); |
262 | if (entry->addr.proto == htons(ETH_P_IP)) | |
263 | ip_eth_mc_map(entry->addr.u.ip4, mdb.addr); | |
264 | #if IS_ENABLED(CONFIG_IPV6) | |
265 | else | |
266 | ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr); | |
267 | #endif | |
268 | ||
269 | mdb.obj.orig_dev = port_dev; | |
9e8430f8 ER |
270 | if (port_dev && type == RTM_NEWMDB) { |
271 | err = switchdev_port_obj_add(port_dev, &mdb.obj); | |
272 | if (!err && pg) | |
273 | pg->flags |= MDB_PG_FLAGS_OFFLOAD; | |
274 | } else if (port_dev && type == RTM_DELMDB) { | |
f1fecb1d | 275 | switchdev_port_obj_del(port_dev, &mdb.obj); |
9e8430f8 | 276 | } |
f1fecb1d | 277 | |
37a393bc CW |
278 | skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC); |
279 | if (!skb) | |
280 | goto errout; | |
281 | ||
282 | err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF); | |
283 | if (err < 0) { | |
284 | kfree_skb(skb); | |
285 | goto errout; | |
286 | } | |
287 | ||
288 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
289 | return; | |
290 | errout: | |
291 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
292 | } | |
293 | ||
9e8430f8 ER |
294 | void br_mdb_notify(struct net_device *dev, struct net_bridge_port_group *pg, |
295 | int type) | |
37a393bc CW |
296 | { |
297 | struct br_mdb_entry entry; | |
298 | ||
c085c499 | 299 | memset(&entry, 0, sizeof(entry)); |
9e8430f8 ER |
300 | entry.ifindex = pg->port->dev->ifindex; |
301 | entry.addr.proto = pg->addr.proto; | |
302 | entry.addr.u.ip4 = pg->addr.u.ip4; | |
37a393bc | 303 | #if IS_ENABLED(CONFIG_IPV6) |
9e8430f8 | 304 | entry.addr.u.ip6 = pg->addr.u.ip6; |
37a393bc | 305 | #endif |
9e8430f8 ER |
306 | entry.vid = pg->addr.vid; |
307 | __mdb_entry_fill_flags(&entry, pg->flags); | |
308 | __br_mdb_notify(dev, &entry, type, pg); | |
37a393bc CW |
309 | } |
310 | ||
949f1e39 SA |
311 | static int nlmsg_populate_rtr_fill(struct sk_buff *skb, |
312 | struct net_device *dev, | |
313 | int ifindex, u32 pid, | |
314 | u32 seq, int type, unsigned int flags) | |
315 | { | |
316 | struct br_port_msg *bpm; | |
317 | struct nlmsghdr *nlh; | |
318 | struct nlattr *nest; | |
319 | ||
320 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI); | |
321 | if (!nlh) | |
322 | return -EMSGSIZE; | |
323 | ||
324 | bpm = nlmsg_data(nlh); | |
325 | memset(bpm, 0, sizeof(*bpm)); | |
326 | bpm->family = AF_BRIDGE; | |
327 | bpm->ifindex = dev->ifindex; | |
328 | nest = nla_nest_start(skb, MDBA_ROUTER); | |
329 | if (!nest) | |
330 | goto cancel; | |
331 | ||
332 | if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex)) | |
333 | goto end; | |
334 | ||
335 | nla_nest_end(skb, nest); | |
336 | nlmsg_end(skb, nlh); | |
337 | return 0; | |
338 | ||
339 | end: | |
340 | nla_nest_end(skb, nest); | |
341 | cancel: | |
342 | nlmsg_cancel(skb, nlh); | |
343 | return -EMSGSIZE; | |
344 | } | |
345 | ||
346 | static inline size_t rtnl_rtr_nlmsg_size(void) | |
347 | { | |
348 | return NLMSG_ALIGN(sizeof(struct br_port_msg)) | |
349 | + nla_total_size(sizeof(__u32)); | |
350 | } | |
351 | ||
352 | void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, | |
353 | int type) | |
354 | { | |
355 | struct net *net = dev_net(dev); | |
356 | struct sk_buff *skb; | |
357 | int err = -ENOBUFS; | |
358 | int ifindex; | |
359 | ||
360 | ifindex = port ? port->dev->ifindex : 0; | |
361 | skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC); | |
362 | if (!skb) | |
363 | goto errout; | |
364 | ||
365 | err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF); | |
366 | if (err < 0) { | |
367 | kfree_skb(skb); | |
368 | goto errout; | |
369 | } | |
370 | ||
371 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
372 | return; | |
373 | ||
374 | errout: | |
375 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
376 | } | |
377 | ||
cfd56754 CW |
378 | static bool is_valid_mdb_entry(struct br_mdb_entry *entry) |
379 | { | |
380 | if (entry->ifindex == 0) | |
381 | return false; | |
382 | ||
383 | if (entry->addr.proto == htons(ETH_P_IP)) { | |
384 | if (!ipv4_is_multicast(entry->addr.u.ip4)) | |
385 | return false; | |
386 | if (ipv4_is_local_multicast(entry->addr.u.ip4)) | |
387 | return false; | |
388 | #if IS_ENABLED(CONFIG_IPV6) | |
389 | } else if (entry->addr.proto == htons(ETH_P_IPV6)) { | |
3c3769e6 | 390 | if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6)) |
cfd56754 CW |
391 | return false; |
392 | #endif | |
393 | } else | |
394 | return false; | |
ccb1c31a AW |
395 | if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) |
396 | return false; | |
74fe61f1 NA |
397 | if (entry->vid >= VLAN_VID_MASK) |
398 | return false; | |
cfd56754 CW |
399 | |
400 | return true; | |
401 | } | |
402 | ||
403 | static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh, | |
404 | struct net_device **pdev, struct br_mdb_entry **pentry) | |
405 | { | |
406 | struct net *net = sock_net(skb->sk); | |
407 | struct br_mdb_entry *entry; | |
408 | struct br_port_msg *bpm; | |
409 | struct nlattr *tb[MDBA_SET_ENTRY_MAX+1]; | |
410 | struct net_device *dev; | |
411 | int err; | |
412 | ||
12d87251 | 413 | err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, NULL); |
cfd56754 CW |
414 | if (err < 0) |
415 | return err; | |
416 | ||
417 | bpm = nlmsg_data(nlh); | |
418 | if (bpm->ifindex == 0) { | |
419 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n"); | |
420 | return -EINVAL; | |
421 | } | |
422 | ||
423 | dev = __dev_get_by_index(net, bpm->ifindex); | |
424 | if (dev == NULL) { | |
425 | pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n"); | |
426 | return -ENODEV; | |
427 | } | |
428 | ||
429 | if (!(dev->priv_flags & IFF_EBRIDGE)) { | |
430 | pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n"); | |
431 | return -EOPNOTSUPP; | |
432 | } | |
433 | ||
434 | *pdev = dev; | |
435 | ||
436 | if (!tb[MDBA_SET_ENTRY] || | |
437 | nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) { | |
438 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n"); | |
439 | return -EINVAL; | |
440 | } | |
441 | ||
442 | entry = nla_data(tb[MDBA_SET_ENTRY]); | |
443 | if (!is_valid_mdb_entry(entry)) { | |
444 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n"); | |
445 | return -EINVAL; | |
446 | } | |
447 | ||
448 | *pentry = entry; | |
449 | return 0; | |
450 | } | |
451 | ||
452 | static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port, | |
9e8430f8 ER |
453 | struct br_ip *group, unsigned char state, |
454 | struct net_bridge_port_group **pg) | |
cfd56754 CW |
455 | { |
456 | struct net_bridge_mdb_entry *mp; | |
457 | struct net_bridge_port_group *p; | |
458 | struct net_bridge_port_group __rcu **pp; | |
459 | struct net_bridge_mdb_htable *mdb; | |
f7e2965d | 460 | unsigned long now = jiffies; |
cfd56754 CW |
461 | int err; |
462 | ||
463 | mdb = mlock_dereference(br->mdb, br); | |
464 | mp = br_mdb_ip_get(mdb, group); | |
465 | if (!mp) { | |
466 | mp = br_multicast_new_group(br, port, group); | |
56bb7fd9 AB |
467 | err = PTR_ERR_OR_ZERO(mp); |
468 | if (err) | |
cfd56754 CW |
469 | return err; |
470 | } | |
471 | ||
472 | for (pp = &mp->ports; | |
473 | (p = mlock_dereference(*pp, br)) != NULL; | |
474 | pp = &p->next) { | |
475 | if (p->port == port) | |
476 | return -EEXIST; | |
477 | if ((unsigned long)p->port < (unsigned long)port) | |
478 | break; | |
479 | } | |
480 | ||
ccb1c31a | 481 | p = br_multicast_new_port_group(port, group, *pp, state); |
cfd56754 CW |
482 | if (unlikely(!p)) |
483 | return -ENOMEM; | |
484 | rcu_assign_pointer(*pp, p); | |
9e8430f8 | 485 | *pg = p; |
f7e2965d SA |
486 | if (state == MDB_TEMPORARY) |
487 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
cfd56754 | 488 | |
cfd56754 CW |
489 | return 0; |
490 | } | |
491 | ||
492 | static int __br_mdb_add(struct net *net, struct net_bridge *br, | |
9e8430f8 ER |
493 | struct br_mdb_entry *entry, |
494 | struct net_bridge_port_group **pg) | |
cfd56754 CW |
495 | { |
496 | struct br_ip ip; | |
497 | struct net_device *dev; | |
498 | struct net_bridge_port *p; | |
499 | int ret; | |
500 | ||
501 | if (!netif_running(br->dev) || br->multicast_disabled) | |
502 | return -EINVAL; | |
503 | ||
504 | dev = __dev_get_by_index(net, entry->ifindex); | |
505 | if (!dev) | |
506 | return -ENODEV; | |
507 | ||
508 | p = br_port_get_rtnl(dev); | |
509 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
510 | return -EINVAL; | |
511 | ||
f1158b74 | 512 | memset(&ip, 0, sizeof(ip)); |
74fe61f1 | 513 | ip.vid = entry->vid; |
cfd56754 CW |
514 | ip.proto = entry->addr.proto; |
515 | if (ip.proto == htons(ETH_P_IP)) | |
516 | ip.u.ip4 = entry->addr.u.ip4; | |
517 | #if IS_ENABLED(CONFIG_IPV6) | |
518 | else | |
519 | ip.u.ip6 = entry->addr.u.ip6; | |
520 | #endif | |
521 | ||
522 | spin_lock_bh(&br->multicast_lock); | |
9e8430f8 | 523 | ret = br_mdb_add_group(br, p, &ip, entry->state, pg); |
cfd56754 CW |
524 | spin_unlock_bh(&br->multicast_lock); |
525 | return ret; | |
526 | } | |
527 | ||
661d2967 | 528 | static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) |
cfd56754 CW |
529 | { |
530 | struct net *net = sock_net(skb->sk); | |
9e8430f8 | 531 | struct net_bridge_port_group *pg; |
2594e906 | 532 | struct net_bridge_vlan_group *vg; |
e44deb2f | 533 | struct net_device *dev, *pdev; |
cfd56754 | 534 | struct br_mdb_entry *entry; |
e44deb2f | 535 | struct net_bridge_port *p; |
2594e906 | 536 | struct net_bridge_vlan *v; |
cfd56754 CW |
537 | struct net_bridge *br; |
538 | int err; | |
539 | ||
540 | err = br_mdb_parse(skb, nlh, &dev, &entry); | |
541 | if (err < 0) | |
542 | return err; | |
543 | ||
544 | br = netdev_priv(dev); | |
545 | ||
e44deb2f SA |
546 | /* If vlan filtering is enabled and VLAN is not specified |
547 | * install mdb entry on all vlans configured on the port. | |
548 | */ | |
549 | pdev = __dev_get_by_index(net, entry->ifindex); | |
550 | if (!pdev) | |
551 | return -ENODEV; | |
552 | ||
553 | p = br_port_get_rtnl(pdev); | |
554 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
555 | return -EINVAL; | |
556 | ||
2594e906 NA |
557 | vg = nbp_vlan_group(p); |
558 | if (br_vlan_enabled(br) && vg && entry->vid == 0) { | |
559 | list_for_each_entry(v, &vg->vlan_list, vlist) { | |
560 | entry->vid = v->vid; | |
9e8430f8 | 561 | err = __br_mdb_add(net, br, entry, &pg); |
e44deb2f SA |
562 | if (err) |
563 | break; | |
9e8430f8 | 564 | __br_mdb_notify(dev, entry, RTM_NEWMDB, pg); |
e44deb2f SA |
565 | } |
566 | } else { | |
9e8430f8 | 567 | err = __br_mdb_add(net, br, entry, &pg); |
e44deb2f | 568 | if (!err) |
9e8430f8 | 569 | __br_mdb_notify(dev, entry, RTM_NEWMDB, pg); |
e44deb2f SA |
570 | } |
571 | ||
cfd56754 CW |
572 | return err; |
573 | } | |
574 | ||
575 | static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry) | |
576 | { | |
577 | struct net_bridge_mdb_htable *mdb; | |
578 | struct net_bridge_mdb_entry *mp; | |
579 | struct net_bridge_port_group *p; | |
580 | struct net_bridge_port_group __rcu **pp; | |
581 | struct br_ip ip; | |
582 | int err = -EINVAL; | |
583 | ||
584 | if (!netif_running(br->dev) || br->multicast_disabled) | |
585 | return -EINVAL; | |
586 | ||
f1158b74 | 587 | memset(&ip, 0, sizeof(ip)); |
74fe61f1 | 588 | ip.vid = entry->vid; |
cfd56754 | 589 | ip.proto = entry->addr.proto; |
51ed7f3e | 590 | if (ip.proto == htons(ETH_P_IP)) |
cfd56754 CW |
591 | ip.u.ip4 = entry->addr.u.ip4; |
592 | #if IS_ENABLED(CONFIG_IPV6) | |
51ed7f3e | 593 | else |
cfd56754 CW |
594 | ip.u.ip6 = entry->addr.u.ip6; |
595 | #endif | |
596 | ||
597 | spin_lock_bh(&br->multicast_lock); | |
598 | mdb = mlock_dereference(br->mdb, br); | |
599 | ||
600 | mp = br_mdb_ip_get(mdb, &ip); | |
601 | if (!mp) | |
602 | goto unlock; | |
603 | ||
604 | for (pp = &mp->ports; | |
605 | (p = mlock_dereference(*pp, br)) != NULL; | |
606 | pp = &p->next) { | |
607 | if (!p->port || p->port->dev->ifindex != entry->ifindex) | |
608 | continue; | |
609 | ||
610 | if (p->port->state == BR_STATE_DISABLED) | |
611 | goto unlock; | |
612 | ||
9d06b6d8 | 613 | __mdb_entry_fill_flags(entry, p->flags); |
cfd56754 CW |
614 | rcu_assign_pointer(*pp, p->next); |
615 | hlist_del_init(&p->mglist); | |
616 | del_timer(&p->timer); | |
617 | call_rcu_bh(&p->rcu, br_multicast_free_pg); | |
618 | err = 0; | |
619 | ||
454594f3 | 620 | if (!mp->ports && !mp->mglist && |
cfd56754 CW |
621 | netif_running(br->dev)) |
622 | mod_timer(&mp->timer, jiffies); | |
623 | break; | |
624 | } | |
625 | ||
626 | unlock: | |
627 | spin_unlock_bh(&br->multicast_lock); | |
628 | return err; | |
629 | } | |
630 | ||
661d2967 | 631 | static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) |
cfd56754 | 632 | { |
e44deb2f | 633 | struct net *net = sock_net(skb->sk); |
2594e906 | 634 | struct net_bridge_vlan_group *vg; |
e44deb2f | 635 | struct net_device *dev, *pdev; |
cfd56754 | 636 | struct br_mdb_entry *entry; |
e44deb2f | 637 | struct net_bridge_port *p; |
2594e906 | 638 | struct net_bridge_vlan *v; |
cfd56754 CW |
639 | struct net_bridge *br; |
640 | int err; | |
641 | ||
642 | err = br_mdb_parse(skb, nlh, &dev, &entry); | |
643 | if (err < 0) | |
644 | return err; | |
645 | ||
646 | br = netdev_priv(dev); | |
647 | ||
e44deb2f SA |
648 | /* If vlan filtering is enabled and VLAN is not specified |
649 | * delete mdb entry on all vlans configured on the port. | |
650 | */ | |
651 | pdev = __dev_get_by_index(net, entry->ifindex); | |
652 | if (!pdev) | |
653 | return -ENODEV; | |
654 | ||
655 | p = br_port_get_rtnl(pdev); | |
656 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
657 | return -EINVAL; | |
658 | ||
2594e906 NA |
659 | vg = nbp_vlan_group(p); |
660 | if (br_vlan_enabled(br) && vg && entry->vid == 0) { | |
661 | list_for_each_entry(v, &vg->vlan_list, vlist) { | |
662 | entry->vid = v->vid; | |
e44deb2f SA |
663 | err = __br_mdb_del(br, entry); |
664 | if (!err) | |
9e8430f8 | 665 | __br_mdb_notify(dev, entry, RTM_DELMDB, NULL); |
e44deb2f SA |
666 | } |
667 | } else { | |
668 | err = __br_mdb_del(br, entry); | |
669 | if (!err) | |
9e8430f8 | 670 | __br_mdb_notify(dev, entry, RTM_DELMDB, NULL); |
e44deb2f SA |
671 | } |
672 | ||
cfd56754 CW |
673 | return err; |
674 | } | |
675 | ||
ee07c6e7 CW |
676 | void br_mdb_init(void) |
677 | { | |
678 | rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, NULL); | |
cfd56754 CW |
679 | rtnl_register(PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, NULL); |
680 | rtnl_register(PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, NULL); | |
ee07c6e7 | 681 | } |
63233159 VY |
682 | |
683 | void br_mdb_uninit(void) | |
684 | { | |
685 | rtnl_unregister(PF_BRIDGE, RTM_GETMDB); | |
686 | rtnl_unregister(PF_BRIDGE, RTM_NEWMDB); | |
687 | rtnl_unregister(PF_BRIDGE, RTM_DELMDB); | |
688 | } |