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 | ||
6dd684c0 ER |
64 | static void __mdb_entry_to_br_ip(struct br_mdb_entry *entry, struct br_ip *ip) |
65 | { | |
66 | memset(ip, 0, sizeof(struct br_ip)); | |
67 | ip->vid = entry->vid; | |
68 | ip->proto = entry->addr.proto; | |
69 | if (ip->proto == htons(ETH_P_IP)) | |
70 | ip->u.ip4 = entry->addr.u.ip4; | |
71 | #if IS_ENABLED(CONFIG_IPV6) | |
72 | else | |
73 | ip->u.ip6 = entry->addr.u.ip6; | |
74 | #endif | |
75 | } | |
76 | ||
ee07c6e7 CW |
77 | static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb, |
78 | struct net_device *dev) | |
79 | { | |
80 | struct net_bridge *br = netdev_priv(dev); | |
81 | struct net_bridge_mdb_htable *mdb; | |
82 | struct nlattr *nest, *nest2; | |
83 | int i, err = 0; | |
84 | int idx = 0, s_idx = cb->args[1]; | |
85 | ||
86 | if (br->multicast_disabled) | |
87 | return 0; | |
88 | ||
89 | mdb = rcu_dereference(br->mdb); | |
90 | if (!mdb) | |
91 | return 0; | |
92 | ||
93 | nest = nla_nest_start(skb, MDBA_MDB); | |
94 | if (nest == NULL) | |
95 | return -EMSGSIZE; | |
96 | ||
97 | for (i = 0; i < mdb->max; i++) { | |
ee07c6e7 | 98 | struct net_bridge_mdb_entry *mp; |
762a3d89 | 99 | struct net_bridge_port_group *p; |
100 | struct net_bridge_port_group __rcu **pp; | |
ee07c6e7 CW |
101 | struct net_bridge_port *port; |
102 | ||
b67bfe0d | 103 | hlist_for_each_entry_rcu(mp, &mdb->mhash[i], hlist[mdb->ver]) { |
ee07c6e7 CW |
104 | if (idx < s_idx) |
105 | goto skip; | |
106 | ||
107 | nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY); | |
108 | if (nest2 == NULL) { | |
109 | err = -EMSGSIZE; | |
110 | goto out; | |
111 | } | |
112 | ||
113 | for (pp = &mp->ports; | |
114 | (p = rcu_dereference(*pp)) != NULL; | |
115 | pp = &p->next) { | |
21257156 | 116 | struct nlattr *nest_ent; |
76cc173d NA |
117 | struct br_mdb_entry e; |
118 | ||
ee07c6e7 | 119 | port = p->port; |
76cc173d NA |
120 | if (!port) |
121 | continue; | |
21257156 | 122 | |
76cc173d NA |
123 | memset(&e, 0, sizeof(e)); |
124 | e.ifindex = port->dev->ifindex; | |
125 | e.vid = p->addr.vid; | |
126 | __mdb_entry_fill_flags(&e, p->flags); | |
127 | if (p->addr.proto == htons(ETH_P_IP)) | |
128 | e.addr.u.ip4 = p->addr.u.ip4; | |
ee07c6e7 | 129 | #if IS_ENABLED(CONFIG_IPV6) |
76cc173d NA |
130 | if (p->addr.proto == htons(ETH_P_IPV6)) |
131 | e.addr.u.ip6 = p->addr.u.ip6; | |
ee07c6e7 | 132 | #endif |
76cc173d | 133 | e.addr.proto = p->addr.proto; |
21257156 NA |
134 | nest_ent = nla_nest_start(skb, |
135 | MDBA_MDB_ENTRY_INFO); | |
136 | if (!nest_ent) { | |
137 | nla_nest_cancel(skb, nest2); | |
138 | err = -EMSGSIZE; | |
139 | goto out; | |
140 | } | |
141 | if (nla_put_nohdr(skb, sizeof(e), &e) || | |
142 | nla_put_u32(skb, | |
143 | MDBA_MDB_EATTR_TIMER, | |
144 | br_timer_value(&p->timer))) { | |
145 | nla_nest_cancel(skb, nest_ent); | |
76cc173d NA |
146 | nla_nest_cancel(skb, nest2); |
147 | err = -EMSGSIZE; | |
148 | goto out; | |
ee07c6e7 | 149 | } |
21257156 | 150 | nla_nest_end(skb, nest_ent); |
ee07c6e7 CW |
151 | } |
152 | nla_nest_end(skb, nest2); | |
153 | skip: | |
154 | idx++; | |
155 | } | |
156 | } | |
157 | ||
158 | out: | |
159 | cb->args[1] = idx; | |
160 | nla_nest_end(skb, nest); | |
161 | return err; | |
162 | } | |
163 | ||
164 | static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
165 | { | |
166 | struct net_device *dev; | |
167 | struct net *net = sock_net(skb->sk); | |
168 | struct nlmsghdr *nlh = NULL; | |
169 | int idx = 0, s_idx; | |
170 | ||
171 | s_idx = cb->args[0]; | |
172 | ||
173 | rcu_read_lock(); | |
174 | ||
2ce297fc CW |
175 | /* In theory this could be wrapped to 0... */ |
176 | cb->seq = net->dev_base_seq + br_mdb_rehash_seq; | |
ee07c6e7 CW |
177 | |
178 | for_each_netdev_rcu(net, dev) { | |
179 | if (dev->priv_flags & IFF_EBRIDGE) { | |
180 | struct br_port_msg *bpm; | |
181 | ||
182 | if (idx < s_idx) | |
183 | goto skip; | |
184 | ||
185 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, | |
186 | cb->nlh->nlmsg_seq, RTM_GETMDB, | |
187 | sizeof(*bpm), NLM_F_MULTI); | |
188 | if (nlh == NULL) | |
189 | break; | |
190 | ||
191 | bpm = nlmsg_data(nlh); | |
c085c499 | 192 | memset(bpm, 0, sizeof(*bpm)); |
ee07c6e7 CW |
193 | bpm->ifindex = dev->ifindex; |
194 | if (br_mdb_fill_info(skb, cb, dev) < 0) | |
195 | goto out; | |
196 | if (br_rports_fill_info(skb, cb, dev) < 0) | |
197 | goto out; | |
198 | ||
199 | cb->args[1] = 0; | |
200 | nlmsg_end(skb, nlh); | |
201 | skip: | |
202 | idx++; | |
203 | } | |
204 | } | |
205 | ||
206 | out: | |
207 | if (nlh) | |
208 | nlmsg_end(skb, nlh); | |
209 | rcu_read_unlock(); | |
210 | cb->args[0] = idx; | |
211 | return skb->len; | |
212 | } | |
213 | ||
37a393bc CW |
214 | static int nlmsg_populate_mdb_fill(struct sk_buff *skb, |
215 | struct net_device *dev, | |
216 | struct br_mdb_entry *entry, u32 pid, | |
217 | u32 seq, int type, unsigned int flags) | |
218 | { | |
219 | struct nlmsghdr *nlh; | |
220 | struct br_port_msg *bpm; | |
221 | struct nlattr *nest, *nest2; | |
222 | ||
82199679 | 223 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0); |
37a393bc CW |
224 | if (!nlh) |
225 | return -EMSGSIZE; | |
226 | ||
227 | bpm = nlmsg_data(nlh); | |
c085c499 | 228 | memset(bpm, 0, sizeof(*bpm)); |
37a393bc CW |
229 | bpm->family = AF_BRIDGE; |
230 | bpm->ifindex = dev->ifindex; | |
231 | nest = nla_nest_start(skb, MDBA_MDB); | |
232 | if (nest == NULL) | |
233 | goto cancel; | |
234 | nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY); | |
235 | if (nest2 == NULL) | |
236 | goto end; | |
237 | ||
238 | if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry)) | |
239 | goto end; | |
240 | ||
241 | nla_nest_end(skb, nest2); | |
242 | nla_nest_end(skb, nest); | |
053c095a JB |
243 | nlmsg_end(skb, nlh); |
244 | return 0; | |
37a393bc CW |
245 | |
246 | end: | |
247 | nla_nest_end(skb, nest); | |
248 | cancel: | |
249 | nlmsg_cancel(skb, nlh); | |
250 | return -EMSGSIZE; | |
251 | } | |
252 | ||
253 | static inline size_t rtnl_mdb_nlmsg_size(void) | |
254 | { | |
255 | return NLMSG_ALIGN(sizeof(struct br_port_msg)) | |
256 | + nla_total_size(sizeof(struct br_mdb_entry)); | |
257 | } | |
258 | ||
45ebcce5 ER |
259 | struct br_mdb_complete_info { |
260 | struct net_bridge_port *port; | |
261 | struct br_ip ip; | |
262 | }; | |
263 | ||
264 | static void br_mdb_complete(struct net_device *dev, int err, void *priv) | |
37a393bc | 265 | { |
45ebcce5 ER |
266 | struct br_mdb_complete_info *data = priv; |
267 | struct net_bridge_port_group __rcu **pp; | |
268 | struct net_bridge_port_group *p; | |
269 | struct net_bridge_mdb_htable *mdb; | |
270 | struct net_bridge_mdb_entry *mp; | |
271 | struct net_bridge_port *port = data->port; | |
272 | struct net_bridge *br = port->br; | |
273 | ||
274 | if (err) | |
275 | goto err; | |
276 | ||
277 | spin_lock_bh(&br->multicast_lock); | |
278 | mdb = mlock_dereference(br->mdb, br); | |
279 | mp = br_mdb_ip_get(mdb, &data->ip); | |
280 | if (!mp) | |
281 | goto out; | |
282 | for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL; | |
283 | pp = &p->next) { | |
284 | if (p->port != port) | |
285 | continue; | |
286 | p->flags |= MDB_PG_FLAGS_OFFLOAD; | |
287 | } | |
288 | out: | |
289 | spin_unlock_bh(&br->multicast_lock); | |
290 | err: | |
291 | kfree(priv); | |
292 | } | |
293 | ||
294 | static void __br_mdb_notify(struct net_device *dev, struct net_bridge_port *p, | |
295 | struct br_mdb_entry *entry, int type) | |
296 | { | |
297 | struct br_mdb_complete_info *complete_info; | |
f1fecb1d ER |
298 | struct switchdev_obj_port_mdb mdb = { |
299 | .obj = { | |
300 | .id = SWITCHDEV_OBJ_ID_PORT_MDB, | |
301 | .flags = SWITCHDEV_F_DEFER, | |
302 | }, | |
303 | .vid = entry->vid, | |
304 | }; | |
305 | struct net_device *port_dev; | |
37a393bc CW |
306 | struct net *net = dev_net(dev); |
307 | struct sk_buff *skb; | |
308 | int err = -ENOBUFS; | |
309 | ||
f1fecb1d ER |
310 | port_dev = __dev_get_by_index(net, entry->ifindex); |
311 | if (entry->addr.proto == htons(ETH_P_IP)) | |
312 | ip_eth_mc_map(entry->addr.u.ip4, mdb.addr); | |
313 | #if IS_ENABLED(CONFIG_IPV6) | |
314 | else | |
315 | ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr); | |
316 | #endif | |
317 | ||
318 | mdb.obj.orig_dev = port_dev; | |
9e8430f8 | 319 | if (port_dev && type == RTM_NEWMDB) { |
45ebcce5 ER |
320 | complete_info = kmalloc(sizeof(*complete_info), GFP_ATOMIC); |
321 | if (complete_info) { | |
322 | complete_info->port = p; | |
323 | __mdb_entry_to_br_ip(entry, &complete_info->ip); | |
324 | mdb.obj.complete_priv = complete_info; | |
325 | mdb.obj.complete = br_mdb_complete; | |
1bfb1596 EV |
326 | if (switchdev_port_obj_add(port_dev, &mdb.obj)) |
327 | kfree(complete_info); | |
45ebcce5 | 328 | } |
9e8430f8 | 329 | } else if (port_dev && type == RTM_DELMDB) { |
f1fecb1d | 330 | switchdev_port_obj_del(port_dev, &mdb.obj); |
9e8430f8 | 331 | } |
f1fecb1d | 332 | |
37a393bc CW |
333 | skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC); |
334 | if (!skb) | |
335 | goto errout; | |
336 | ||
337 | err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF); | |
338 | if (err < 0) { | |
339 | kfree_skb(skb); | |
340 | goto errout; | |
341 | } | |
342 | ||
343 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
344 | return; | |
345 | errout: | |
346 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
347 | } | |
348 | ||
45ebcce5 ER |
349 | void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, |
350 | struct br_ip *group, int type, u8 flags) | |
37a393bc CW |
351 | { |
352 | struct br_mdb_entry entry; | |
353 | ||
c085c499 | 354 | memset(&entry, 0, sizeof(entry)); |
45ebcce5 ER |
355 | entry.ifindex = port->dev->ifindex; |
356 | entry.addr.proto = group->proto; | |
357 | entry.addr.u.ip4 = group->u.ip4; | |
37a393bc | 358 | #if IS_ENABLED(CONFIG_IPV6) |
45ebcce5 | 359 | entry.addr.u.ip6 = group->u.ip6; |
37a393bc | 360 | #endif |
45ebcce5 ER |
361 | entry.vid = group->vid; |
362 | __mdb_entry_fill_flags(&entry, flags); | |
363 | __br_mdb_notify(dev, port, &entry, type); | |
37a393bc CW |
364 | } |
365 | ||
949f1e39 SA |
366 | static int nlmsg_populate_rtr_fill(struct sk_buff *skb, |
367 | struct net_device *dev, | |
368 | int ifindex, u32 pid, | |
369 | u32 seq, int type, unsigned int flags) | |
370 | { | |
371 | struct br_port_msg *bpm; | |
372 | struct nlmsghdr *nlh; | |
373 | struct nlattr *nest; | |
374 | ||
375 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI); | |
376 | if (!nlh) | |
377 | return -EMSGSIZE; | |
378 | ||
379 | bpm = nlmsg_data(nlh); | |
380 | memset(bpm, 0, sizeof(*bpm)); | |
381 | bpm->family = AF_BRIDGE; | |
382 | bpm->ifindex = dev->ifindex; | |
383 | nest = nla_nest_start(skb, MDBA_ROUTER); | |
384 | if (!nest) | |
385 | goto cancel; | |
386 | ||
387 | if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex)) | |
388 | goto end; | |
389 | ||
390 | nla_nest_end(skb, nest); | |
391 | nlmsg_end(skb, nlh); | |
392 | return 0; | |
393 | ||
394 | end: | |
395 | nla_nest_end(skb, nest); | |
396 | cancel: | |
397 | nlmsg_cancel(skb, nlh); | |
398 | return -EMSGSIZE; | |
399 | } | |
400 | ||
401 | static inline size_t rtnl_rtr_nlmsg_size(void) | |
402 | { | |
403 | return NLMSG_ALIGN(sizeof(struct br_port_msg)) | |
404 | + nla_total_size(sizeof(__u32)); | |
405 | } | |
406 | ||
407 | void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, | |
408 | int type) | |
409 | { | |
410 | struct net *net = dev_net(dev); | |
411 | struct sk_buff *skb; | |
412 | int err = -ENOBUFS; | |
413 | int ifindex; | |
414 | ||
415 | ifindex = port ? port->dev->ifindex : 0; | |
416 | skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC); | |
417 | if (!skb) | |
418 | goto errout; | |
419 | ||
420 | err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF); | |
421 | if (err < 0) { | |
422 | kfree_skb(skb); | |
423 | goto errout; | |
424 | } | |
425 | ||
426 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
427 | return; | |
428 | ||
429 | errout: | |
430 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
431 | } | |
432 | ||
cfd56754 CW |
433 | static bool is_valid_mdb_entry(struct br_mdb_entry *entry) |
434 | { | |
435 | if (entry->ifindex == 0) | |
436 | return false; | |
437 | ||
438 | if (entry->addr.proto == htons(ETH_P_IP)) { | |
439 | if (!ipv4_is_multicast(entry->addr.u.ip4)) | |
440 | return false; | |
441 | if (ipv4_is_local_multicast(entry->addr.u.ip4)) | |
442 | return false; | |
443 | #if IS_ENABLED(CONFIG_IPV6) | |
444 | } else if (entry->addr.proto == htons(ETH_P_IPV6)) { | |
3c3769e6 | 445 | if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6)) |
cfd56754 CW |
446 | return false; |
447 | #endif | |
448 | } else | |
449 | return false; | |
ccb1c31a AW |
450 | if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) |
451 | return false; | |
74fe61f1 NA |
452 | if (entry->vid >= VLAN_VID_MASK) |
453 | return false; | |
cfd56754 CW |
454 | |
455 | return true; | |
456 | } | |
457 | ||
458 | static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh, | |
459 | struct net_device **pdev, struct br_mdb_entry **pentry) | |
460 | { | |
461 | struct net *net = sock_net(skb->sk); | |
462 | struct br_mdb_entry *entry; | |
463 | struct br_port_msg *bpm; | |
464 | struct nlattr *tb[MDBA_SET_ENTRY_MAX+1]; | |
465 | struct net_device *dev; | |
466 | int err; | |
467 | ||
fceb6435 JB |
468 | err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, NULL, |
469 | NULL); | |
cfd56754 CW |
470 | if (err < 0) |
471 | return err; | |
472 | ||
473 | bpm = nlmsg_data(nlh); | |
474 | if (bpm->ifindex == 0) { | |
475 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n"); | |
476 | return -EINVAL; | |
477 | } | |
478 | ||
479 | dev = __dev_get_by_index(net, bpm->ifindex); | |
480 | if (dev == NULL) { | |
481 | pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n"); | |
482 | return -ENODEV; | |
483 | } | |
484 | ||
485 | if (!(dev->priv_flags & IFF_EBRIDGE)) { | |
486 | pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n"); | |
487 | return -EOPNOTSUPP; | |
488 | } | |
489 | ||
490 | *pdev = dev; | |
491 | ||
492 | if (!tb[MDBA_SET_ENTRY] || | |
493 | nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) { | |
494 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n"); | |
495 | return -EINVAL; | |
496 | } | |
497 | ||
498 | entry = nla_data(tb[MDBA_SET_ENTRY]); | |
499 | if (!is_valid_mdb_entry(entry)) { | |
500 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n"); | |
501 | return -EINVAL; | |
502 | } | |
503 | ||
504 | *pentry = entry; | |
505 | return 0; | |
506 | } | |
507 | ||
508 | static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port, | |
45ebcce5 | 509 | struct br_ip *group, unsigned char state) |
cfd56754 CW |
510 | { |
511 | struct net_bridge_mdb_entry *mp; | |
512 | struct net_bridge_port_group *p; | |
513 | struct net_bridge_port_group __rcu **pp; | |
514 | struct net_bridge_mdb_htable *mdb; | |
f7e2965d | 515 | unsigned long now = jiffies; |
cfd56754 CW |
516 | int err; |
517 | ||
518 | mdb = mlock_dereference(br->mdb, br); | |
519 | mp = br_mdb_ip_get(mdb, group); | |
520 | if (!mp) { | |
521 | mp = br_multicast_new_group(br, port, group); | |
56bb7fd9 AB |
522 | err = PTR_ERR_OR_ZERO(mp); |
523 | if (err) | |
cfd56754 CW |
524 | return err; |
525 | } | |
526 | ||
527 | for (pp = &mp->ports; | |
528 | (p = mlock_dereference(*pp, br)) != NULL; | |
529 | pp = &p->next) { | |
530 | if (p->port == port) | |
531 | return -EEXIST; | |
532 | if ((unsigned long)p->port < (unsigned long)port) | |
533 | break; | |
534 | } | |
535 | ||
6db6f0ea | 536 | p = br_multicast_new_port_group(port, group, *pp, state, NULL); |
cfd56754 CW |
537 | if (unlikely(!p)) |
538 | return -ENOMEM; | |
539 | rcu_assign_pointer(*pp, p); | |
f7e2965d SA |
540 | if (state == MDB_TEMPORARY) |
541 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
cfd56754 | 542 | |
cfd56754 CW |
543 | return 0; |
544 | } | |
545 | ||
546 | static int __br_mdb_add(struct net *net, struct net_bridge *br, | |
45ebcce5 | 547 | struct br_mdb_entry *entry) |
cfd56754 CW |
548 | { |
549 | struct br_ip ip; | |
550 | struct net_device *dev; | |
551 | struct net_bridge_port *p; | |
552 | int ret; | |
553 | ||
554 | if (!netif_running(br->dev) || br->multicast_disabled) | |
555 | return -EINVAL; | |
556 | ||
557 | dev = __dev_get_by_index(net, entry->ifindex); | |
558 | if (!dev) | |
559 | return -ENODEV; | |
560 | ||
561 | p = br_port_get_rtnl(dev); | |
562 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
563 | return -EINVAL; | |
564 | ||
6dd684c0 | 565 | __mdb_entry_to_br_ip(entry, &ip); |
cfd56754 CW |
566 | |
567 | spin_lock_bh(&br->multicast_lock); | |
45ebcce5 | 568 | ret = br_mdb_add_group(br, p, &ip, entry->state); |
cfd56754 CW |
569 | spin_unlock_bh(&br->multicast_lock); |
570 | return ret; | |
571 | } | |
572 | ||
c21ef3e3 DA |
573 | static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, |
574 | struct netlink_ext_ack *extack) | |
cfd56754 CW |
575 | { |
576 | struct net *net = sock_net(skb->sk); | |
2594e906 | 577 | struct net_bridge_vlan_group *vg; |
e44deb2f | 578 | struct net_device *dev, *pdev; |
cfd56754 | 579 | struct br_mdb_entry *entry; |
e44deb2f | 580 | struct net_bridge_port *p; |
2594e906 | 581 | struct net_bridge_vlan *v; |
cfd56754 CW |
582 | struct net_bridge *br; |
583 | int err; | |
584 | ||
585 | err = br_mdb_parse(skb, nlh, &dev, &entry); | |
586 | if (err < 0) | |
587 | return err; | |
588 | ||
589 | br = netdev_priv(dev); | |
590 | ||
e44deb2f SA |
591 | /* If vlan filtering is enabled and VLAN is not specified |
592 | * install mdb entry on all vlans configured on the port. | |
593 | */ | |
594 | pdev = __dev_get_by_index(net, entry->ifindex); | |
595 | if (!pdev) | |
596 | return -ENODEV; | |
597 | ||
598 | p = br_port_get_rtnl(pdev); | |
599 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
600 | return -EINVAL; | |
601 | ||
2594e906 | 602 | vg = nbp_vlan_group(p); |
1f51445a | 603 | if (br_vlan_enabled(br->dev) && vg && entry->vid == 0) { |
2594e906 NA |
604 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
605 | entry->vid = v->vid; | |
45ebcce5 | 606 | err = __br_mdb_add(net, br, entry); |
e44deb2f SA |
607 | if (err) |
608 | break; | |
45ebcce5 | 609 | __br_mdb_notify(dev, p, entry, RTM_NEWMDB); |
e44deb2f SA |
610 | } |
611 | } else { | |
45ebcce5 | 612 | err = __br_mdb_add(net, br, entry); |
e44deb2f | 613 | if (!err) |
45ebcce5 | 614 | __br_mdb_notify(dev, p, entry, RTM_NEWMDB); |
e44deb2f SA |
615 | } |
616 | ||
cfd56754 CW |
617 | return err; |
618 | } | |
619 | ||
620 | static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry) | |
621 | { | |
622 | struct net_bridge_mdb_htable *mdb; | |
623 | struct net_bridge_mdb_entry *mp; | |
624 | struct net_bridge_port_group *p; | |
625 | struct net_bridge_port_group __rcu **pp; | |
626 | struct br_ip ip; | |
627 | int err = -EINVAL; | |
628 | ||
629 | if (!netif_running(br->dev) || br->multicast_disabled) | |
630 | return -EINVAL; | |
631 | ||
6dd684c0 | 632 | __mdb_entry_to_br_ip(entry, &ip); |
cfd56754 CW |
633 | |
634 | spin_lock_bh(&br->multicast_lock); | |
635 | mdb = mlock_dereference(br->mdb, br); | |
636 | ||
637 | mp = br_mdb_ip_get(mdb, &ip); | |
638 | if (!mp) | |
639 | goto unlock; | |
640 | ||
641 | for (pp = &mp->ports; | |
642 | (p = mlock_dereference(*pp, br)) != NULL; | |
643 | pp = &p->next) { | |
644 | if (!p->port || p->port->dev->ifindex != entry->ifindex) | |
645 | continue; | |
646 | ||
647 | if (p->port->state == BR_STATE_DISABLED) | |
648 | goto unlock; | |
649 | ||
9d06b6d8 | 650 | __mdb_entry_fill_flags(entry, p->flags); |
cfd56754 CW |
651 | rcu_assign_pointer(*pp, p->next); |
652 | hlist_del_init(&p->mglist); | |
653 | del_timer(&p->timer); | |
654 | call_rcu_bh(&p->rcu, br_multicast_free_pg); | |
655 | err = 0; | |
656 | ||
454594f3 | 657 | if (!mp->ports && !mp->mglist && |
cfd56754 CW |
658 | netif_running(br->dev)) |
659 | mod_timer(&mp->timer, jiffies); | |
660 | break; | |
661 | } | |
662 | ||
663 | unlock: | |
664 | spin_unlock_bh(&br->multicast_lock); | |
665 | return err; | |
666 | } | |
667 | ||
c21ef3e3 DA |
668 | static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, |
669 | struct netlink_ext_ack *extack) | |
cfd56754 | 670 | { |
e44deb2f | 671 | struct net *net = sock_net(skb->sk); |
2594e906 | 672 | struct net_bridge_vlan_group *vg; |
e44deb2f | 673 | struct net_device *dev, *pdev; |
cfd56754 | 674 | struct br_mdb_entry *entry; |
e44deb2f | 675 | struct net_bridge_port *p; |
2594e906 | 676 | struct net_bridge_vlan *v; |
cfd56754 CW |
677 | struct net_bridge *br; |
678 | int err; | |
679 | ||
680 | err = br_mdb_parse(skb, nlh, &dev, &entry); | |
681 | if (err < 0) | |
682 | return err; | |
683 | ||
684 | br = netdev_priv(dev); | |
685 | ||
e44deb2f SA |
686 | /* If vlan filtering is enabled and VLAN is not specified |
687 | * delete mdb entry on all vlans configured on the port. | |
688 | */ | |
689 | pdev = __dev_get_by_index(net, entry->ifindex); | |
690 | if (!pdev) | |
691 | return -ENODEV; | |
692 | ||
693 | p = br_port_get_rtnl(pdev); | |
694 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
695 | return -EINVAL; | |
696 | ||
2594e906 | 697 | vg = nbp_vlan_group(p); |
1f51445a | 698 | if (br_vlan_enabled(br->dev) && vg && entry->vid == 0) { |
2594e906 NA |
699 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
700 | entry->vid = v->vid; | |
e44deb2f SA |
701 | err = __br_mdb_del(br, entry); |
702 | if (!err) | |
45ebcce5 | 703 | __br_mdb_notify(dev, p, entry, RTM_DELMDB); |
e44deb2f SA |
704 | } |
705 | } else { | |
706 | err = __br_mdb_del(br, entry); | |
707 | if (!err) | |
45ebcce5 | 708 | __br_mdb_notify(dev, p, entry, RTM_DELMDB); |
e44deb2f SA |
709 | } |
710 | ||
cfd56754 CW |
711 | return err; |
712 | } | |
713 | ||
ee07c6e7 CW |
714 | void br_mdb_init(void) |
715 | { | |
b97bac64 FW |
716 | rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, 0); |
717 | rtnl_register(PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, 0); | |
718 | rtnl_register(PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, 0); | |
ee07c6e7 | 719 | } |
63233159 VY |
720 | |
721 | void br_mdb_uninit(void) | |
722 | { | |
723 | rtnl_unregister(PF_BRIDGE, RTM_GETMDB); | |
724 | rtnl_unregister(PF_BRIDGE, RTM_NEWMDB); | |
725 | rtnl_unregister(PF_BRIDGE, RTM_DELMDB); | |
726 | } |