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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 | ||
87 | if (br->multicast_disabled) | |
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 | ||
295 | static void __br_mdb_notify(struct net_device *dev, struct net_bridge_port *p, | |
296 | struct br_mdb_entry *entry, int type) | |
297 | { | |
298 | struct br_mdb_complete_info *complete_info; | |
f1fecb1d ER |
299 | struct switchdev_obj_port_mdb mdb = { |
300 | .obj = { | |
301 | .id = SWITCHDEV_OBJ_ID_PORT_MDB, | |
302 | .flags = SWITCHDEV_F_DEFER, | |
303 | }, | |
304 | .vid = entry->vid, | |
305 | }; | |
306 | struct net_device *port_dev; | |
37a393bc CW |
307 | struct net *net = dev_net(dev); |
308 | struct sk_buff *skb; | |
309 | int err = -ENOBUFS; | |
310 | ||
f1fecb1d ER |
311 | port_dev = __dev_get_by_index(net, entry->ifindex); |
312 | if (entry->addr.proto == htons(ETH_P_IP)) | |
313 | ip_eth_mc_map(entry->addr.u.ip4, mdb.addr); | |
314 | #if IS_ENABLED(CONFIG_IPV6) | |
315 | else | |
316 | ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr); | |
317 | #endif | |
318 | ||
319 | mdb.obj.orig_dev = port_dev; | |
9e8430f8 | 320 | if (port_dev && type == RTM_NEWMDB) { |
45ebcce5 ER |
321 | complete_info = kmalloc(sizeof(*complete_info), GFP_ATOMIC); |
322 | if (complete_info) { | |
323 | complete_info->port = p; | |
324 | __mdb_entry_to_br_ip(entry, &complete_info->ip); | |
325 | mdb.obj.complete_priv = complete_info; | |
326 | mdb.obj.complete = br_mdb_complete; | |
1bfb1596 EV |
327 | if (switchdev_port_obj_add(port_dev, &mdb.obj)) |
328 | kfree(complete_info); | |
45ebcce5 | 329 | } |
9e8430f8 | 330 | } else if (port_dev && type == RTM_DELMDB) { |
f1fecb1d | 331 | switchdev_port_obj_del(port_dev, &mdb.obj); |
9e8430f8 | 332 | } |
f1fecb1d | 333 | |
37a393bc CW |
334 | skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC); |
335 | if (!skb) | |
336 | goto errout; | |
337 | ||
338 | err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF); | |
339 | if (err < 0) { | |
340 | kfree_skb(skb); | |
341 | goto errout; | |
342 | } | |
343 | ||
344 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
345 | return; | |
346 | errout: | |
347 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
348 | } | |
349 | ||
45ebcce5 ER |
350 | void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, |
351 | struct br_ip *group, int type, u8 flags) | |
37a393bc CW |
352 | { |
353 | struct br_mdb_entry entry; | |
354 | ||
c085c499 | 355 | memset(&entry, 0, sizeof(entry)); |
45ebcce5 ER |
356 | entry.ifindex = port->dev->ifindex; |
357 | entry.addr.proto = group->proto; | |
358 | entry.addr.u.ip4 = group->u.ip4; | |
37a393bc | 359 | #if IS_ENABLED(CONFIG_IPV6) |
45ebcce5 | 360 | entry.addr.u.ip6 = group->u.ip6; |
37a393bc | 361 | #endif |
45ebcce5 ER |
362 | entry.vid = group->vid; |
363 | __mdb_entry_fill_flags(&entry, flags); | |
364 | __br_mdb_notify(dev, port, &entry, type); | |
37a393bc CW |
365 | } |
366 | ||
949f1e39 SA |
367 | static int nlmsg_populate_rtr_fill(struct sk_buff *skb, |
368 | struct net_device *dev, | |
369 | int ifindex, u32 pid, | |
370 | u32 seq, int type, unsigned int flags) | |
371 | { | |
372 | struct br_port_msg *bpm; | |
373 | struct nlmsghdr *nlh; | |
374 | struct nlattr *nest; | |
375 | ||
376 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI); | |
377 | if (!nlh) | |
378 | return -EMSGSIZE; | |
379 | ||
380 | bpm = nlmsg_data(nlh); | |
381 | memset(bpm, 0, sizeof(*bpm)); | |
382 | bpm->family = AF_BRIDGE; | |
383 | bpm->ifindex = dev->ifindex; | |
384 | nest = nla_nest_start(skb, MDBA_ROUTER); | |
385 | if (!nest) | |
386 | goto cancel; | |
387 | ||
388 | if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex)) | |
389 | goto end; | |
390 | ||
391 | nla_nest_end(skb, nest); | |
392 | nlmsg_end(skb, nlh); | |
393 | return 0; | |
394 | ||
395 | end: | |
396 | nla_nest_end(skb, nest); | |
397 | cancel: | |
398 | nlmsg_cancel(skb, nlh); | |
399 | return -EMSGSIZE; | |
400 | } | |
401 | ||
402 | static inline size_t rtnl_rtr_nlmsg_size(void) | |
403 | { | |
404 | return NLMSG_ALIGN(sizeof(struct br_port_msg)) | |
405 | + nla_total_size(sizeof(__u32)); | |
406 | } | |
407 | ||
408 | void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, | |
409 | int type) | |
410 | { | |
411 | struct net *net = dev_net(dev); | |
412 | struct sk_buff *skb; | |
413 | int err = -ENOBUFS; | |
414 | int ifindex; | |
415 | ||
416 | ifindex = port ? port->dev->ifindex : 0; | |
417 | skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC); | |
418 | if (!skb) | |
419 | goto errout; | |
420 | ||
421 | err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF); | |
422 | if (err < 0) { | |
423 | kfree_skb(skb); | |
424 | goto errout; | |
425 | } | |
426 | ||
427 | rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC); | |
428 | return; | |
429 | ||
430 | errout: | |
431 | rtnl_set_sk_err(net, RTNLGRP_MDB, err); | |
432 | } | |
433 | ||
cfd56754 CW |
434 | static bool is_valid_mdb_entry(struct br_mdb_entry *entry) |
435 | { | |
436 | if (entry->ifindex == 0) | |
437 | return false; | |
438 | ||
439 | if (entry->addr.proto == htons(ETH_P_IP)) { | |
440 | if (!ipv4_is_multicast(entry->addr.u.ip4)) | |
441 | return false; | |
442 | if (ipv4_is_local_multicast(entry->addr.u.ip4)) | |
443 | return false; | |
444 | #if IS_ENABLED(CONFIG_IPV6) | |
445 | } else if (entry->addr.proto == htons(ETH_P_IPV6)) { | |
3c3769e6 | 446 | if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6)) |
cfd56754 CW |
447 | return false; |
448 | #endif | |
449 | } else | |
450 | return false; | |
ccb1c31a AW |
451 | if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) |
452 | return false; | |
74fe61f1 NA |
453 | if (entry->vid >= VLAN_VID_MASK) |
454 | return false; | |
cfd56754 CW |
455 | |
456 | return true; | |
457 | } | |
458 | ||
459 | static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh, | |
460 | struct net_device **pdev, struct br_mdb_entry **pentry) | |
461 | { | |
462 | struct net *net = sock_net(skb->sk); | |
463 | struct br_mdb_entry *entry; | |
464 | struct br_port_msg *bpm; | |
465 | struct nlattr *tb[MDBA_SET_ENTRY_MAX+1]; | |
466 | struct net_device *dev; | |
467 | int err; | |
468 | ||
fceb6435 JB |
469 | err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, NULL, |
470 | NULL); | |
cfd56754 CW |
471 | if (err < 0) |
472 | return err; | |
473 | ||
474 | bpm = nlmsg_data(nlh); | |
475 | if (bpm->ifindex == 0) { | |
476 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n"); | |
477 | return -EINVAL; | |
478 | } | |
479 | ||
480 | dev = __dev_get_by_index(net, bpm->ifindex); | |
481 | if (dev == NULL) { | |
482 | pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n"); | |
483 | return -ENODEV; | |
484 | } | |
485 | ||
486 | if (!(dev->priv_flags & IFF_EBRIDGE)) { | |
487 | pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n"); | |
488 | return -EOPNOTSUPP; | |
489 | } | |
490 | ||
491 | *pdev = dev; | |
492 | ||
493 | if (!tb[MDBA_SET_ENTRY] || | |
494 | nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) { | |
495 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n"); | |
496 | return -EINVAL; | |
497 | } | |
498 | ||
499 | entry = nla_data(tb[MDBA_SET_ENTRY]); | |
500 | if (!is_valid_mdb_entry(entry)) { | |
501 | pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n"); | |
502 | return -EINVAL; | |
503 | } | |
504 | ||
505 | *pentry = entry; | |
506 | return 0; | |
507 | } | |
508 | ||
509 | static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port, | |
45ebcce5 | 510 | struct br_ip *group, unsigned char state) |
cfd56754 CW |
511 | { |
512 | struct net_bridge_mdb_entry *mp; | |
513 | struct net_bridge_port_group *p; | |
514 | struct net_bridge_port_group __rcu **pp; | |
515 | struct net_bridge_mdb_htable *mdb; | |
f7e2965d | 516 | unsigned long now = jiffies; |
cfd56754 CW |
517 | int err; |
518 | ||
519 | mdb = mlock_dereference(br->mdb, br); | |
520 | mp = br_mdb_ip_get(mdb, group); | |
521 | if (!mp) { | |
522 | mp = br_multicast_new_group(br, port, group); | |
56bb7fd9 AB |
523 | err = PTR_ERR_OR_ZERO(mp); |
524 | if (err) | |
cfd56754 CW |
525 | return err; |
526 | } | |
527 | ||
528 | for (pp = &mp->ports; | |
529 | (p = mlock_dereference(*pp, br)) != NULL; | |
530 | pp = &p->next) { | |
531 | if (p->port == port) | |
532 | return -EEXIST; | |
533 | if ((unsigned long)p->port < (unsigned long)port) | |
534 | break; | |
535 | } | |
536 | ||
6db6f0ea | 537 | p = br_multicast_new_port_group(port, group, *pp, state, NULL); |
cfd56754 CW |
538 | if (unlikely(!p)) |
539 | return -ENOMEM; | |
540 | rcu_assign_pointer(*pp, p); | |
f7e2965d SA |
541 | if (state == MDB_TEMPORARY) |
542 | mod_timer(&p->timer, now + br->multicast_membership_interval); | |
cfd56754 | 543 | |
cfd56754 CW |
544 | return 0; |
545 | } | |
546 | ||
547 | static int __br_mdb_add(struct net *net, struct net_bridge *br, | |
45ebcce5 | 548 | struct br_mdb_entry *entry) |
cfd56754 CW |
549 | { |
550 | struct br_ip ip; | |
551 | struct net_device *dev; | |
552 | struct net_bridge_port *p; | |
553 | int ret; | |
554 | ||
555 | if (!netif_running(br->dev) || br->multicast_disabled) | |
556 | return -EINVAL; | |
557 | ||
558 | dev = __dev_get_by_index(net, entry->ifindex); | |
559 | if (!dev) | |
560 | return -ENODEV; | |
561 | ||
562 | p = br_port_get_rtnl(dev); | |
563 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
564 | return -EINVAL; | |
565 | ||
6dd684c0 | 566 | __mdb_entry_to_br_ip(entry, &ip); |
cfd56754 CW |
567 | |
568 | spin_lock_bh(&br->multicast_lock); | |
45ebcce5 | 569 | ret = br_mdb_add_group(br, p, &ip, entry->state); |
cfd56754 CW |
570 | spin_unlock_bh(&br->multicast_lock); |
571 | return ret; | |
572 | } | |
573 | ||
c21ef3e3 DA |
574 | static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, |
575 | struct netlink_ext_ack *extack) | |
cfd56754 CW |
576 | { |
577 | struct net *net = sock_net(skb->sk); | |
2594e906 | 578 | struct net_bridge_vlan_group *vg; |
e44deb2f | 579 | struct net_device *dev, *pdev; |
cfd56754 | 580 | struct br_mdb_entry *entry; |
e44deb2f | 581 | struct net_bridge_port *p; |
2594e906 | 582 | struct net_bridge_vlan *v; |
cfd56754 CW |
583 | struct net_bridge *br; |
584 | int err; | |
585 | ||
586 | err = br_mdb_parse(skb, nlh, &dev, &entry); | |
587 | if (err < 0) | |
588 | return err; | |
589 | ||
590 | br = netdev_priv(dev); | |
591 | ||
e44deb2f SA |
592 | /* If vlan filtering is enabled and VLAN is not specified |
593 | * install mdb entry on all vlans configured on the port. | |
594 | */ | |
595 | pdev = __dev_get_by_index(net, entry->ifindex); | |
596 | if (!pdev) | |
597 | return -ENODEV; | |
598 | ||
599 | p = br_port_get_rtnl(pdev); | |
600 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
601 | return -EINVAL; | |
602 | ||
2594e906 | 603 | vg = nbp_vlan_group(p); |
1f51445a | 604 | if (br_vlan_enabled(br->dev) && vg && entry->vid == 0) { |
2594e906 NA |
605 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
606 | entry->vid = v->vid; | |
45ebcce5 | 607 | err = __br_mdb_add(net, br, entry); |
e44deb2f SA |
608 | if (err) |
609 | break; | |
45ebcce5 | 610 | __br_mdb_notify(dev, p, entry, RTM_NEWMDB); |
e44deb2f SA |
611 | } |
612 | } else { | |
45ebcce5 | 613 | err = __br_mdb_add(net, br, entry); |
e44deb2f | 614 | if (!err) |
45ebcce5 | 615 | __br_mdb_notify(dev, p, entry, RTM_NEWMDB); |
e44deb2f SA |
616 | } |
617 | ||
cfd56754 CW |
618 | return err; |
619 | } | |
620 | ||
621 | static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry) | |
622 | { | |
623 | struct net_bridge_mdb_htable *mdb; | |
624 | struct net_bridge_mdb_entry *mp; | |
625 | struct net_bridge_port_group *p; | |
626 | struct net_bridge_port_group __rcu **pp; | |
627 | struct br_ip ip; | |
628 | int err = -EINVAL; | |
629 | ||
630 | if (!netif_running(br->dev) || br->multicast_disabled) | |
631 | return -EINVAL; | |
632 | ||
6dd684c0 | 633 | __mdb_entry_to_br_ip(entry, &ip); |
cfd56754 CW |
634 | |
635 | spin_lock_bh(&br->multicast_lock); | |
636 | mdb = mlock_dereference(br->mdb, br); | |
637 | ||
638 | mp = br_mdb_ip_get(mdb, &ip); | |
639 | if (!mp) | |
640 | goto unlock; | |
641 | ||
642 | for (pp = &mp->ports; | |
643 | (p = mlock_dereference(*pp, br)) != NULL; | |
644 | pp = &p->next) { | |
645 | if (!p->port || p->port->dev->ifindex != entry->ifindex) | |
646 | continue; | |
647 | ||
648 | if (p->port->state == BR_STATE_DISABLED) | |
649 | goto unlock; | |
650 | ||
9d06b6d8 | 651 | __mdb_entry_fill_flags(entry, p->flags); |
cfd56754 CW |
652 | rcu_assign_pointer(*pp, p->next); |
653 | hlist_del_init(&p->mglist); | |
654 | del_timer(&p->timer); | |
655 | call_rcu_bh(&p->rcu, br_multicast_free_pg); | |
656 | err = 0; | |
657 | ||
454594f3 | 658 | if (!mp->ports && !mp->mglist && |
cfd56754 CW |
659 | netif_running(br->dev)) |
660 | mod_timer(&mp->timer, jiffies); | |
661 | break; | |
662 | } | |
663 | ||
664 | unlock: | |
665 | spin_unlock_bh(&br->multicast_lock); | |
666 | return err; | |
667 | } | |
668 | ||
c21ef3e3 DA |
669 | static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, |
670 | struct netlink_ext_ack *extack) | |
cfd56754 | 671 | { |
e44deb2f | 672 | struct net *net = sock_net(skb->sk); |
2594e906 | 673 | struct net_bridge_vlan_group *vg; |
e44deb2f | 674 | struct net_device *dev, *pdev; |
cfd56754 | 675 | struct br_mdb_entry *entry; |
e44deb2f | 676 | struct net_bridge_port *p; |
2594e906 | 677 | struct net_bridge_vlan *v; |
cfd56754 CW |
678 | struct net_bridge *br; |
679 | int err; | |
680 | ||
681 | err = br_mdb_parse(skb, nlh, &dev, &entry); | |
682 | if (err < 0) | |
683 | return err; | |
684 | ||
685 | br = netdev_priv(dev); | |
686 | ||
e44deb2f SA |
687 | /* If vlan filtering is enabled and VLAN is not specified |
688 | * delete mdb entry on all vlans configured on the port. | |
689 | */ | |
690 | pdev = __dev_get_by_index(net, entry->ifindex); | |
691 | if (!pdev) | |
692 | return -ENODEV; | |
693 | ||
694 | p = br_port_get_rtnl(pdev); | |
695 | if (!p || p->br != br || p->state == BR_STATE_DISABLED) | |
696 | return -EINVAL; | |
697 | ||
2594e906 | 698 | vg = nbp_vlan_group(p); |
1f51445a | 699 | if (br_vlan_enabled(br->dev) && vg && entry->vid == 0) { |
2594e906 NA |
700 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
701 | entry->vid = v->vid; | |
e44deb2f SA |
702 | err = __br_mdb_del(br, entry); |
703 | if (!err) | |
45ebcce5 | 704 | __br_mdb_notify(dev, p, entry, RTM_DELMDB); |
e44deb2f SA |
705 | } |
706 | } else { | |
707 | err = __br_mdb_del(br, entry); | |
708 | if (!err) | |
45ebcce5 | 709 | __br_mdb_notify(dev, p, entry, RTM_DELMDB); |
e44deb2f SA |
710 | } |
711 | ||
cfd56754 CW |
712 | return err; |
713 | } | |
714 | ||
ee07c6e7 CW |
715 | void br_mdb_init(void) |
716 | { | |
b97bac64 FW |
717 | rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, 0); |
718 | rtnl_register(PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, 0); | |
719 | rtnl_register(PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, 0); | |
ee07c6e7 | 720 | } |
63233159 VY |
721 | |
722 | void br_mdb_uninit(void) | |
723 | { | |
724 | rtnl_unregister(PF_BRIDGE, RTM_GETMDB); | |
725 | rtnl_unregister(PF_BRIDGE, RTM_NEWMDB); | |
726 | rtnl_unregister(PF_BRIDGE, RTM_DELMDB); | |
727 | } |