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Commit | Line | Data |
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11dc1f36 SH |
1 | /* |
2 | * Bridge netlink control interface | |
3 | * | |
4 | * Authors: | |
5 | * Stephen Hemminger <shemminger@osdl.org> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
bb900b27 | 15 | #include <linux/etherdevice.h> |
32fe21c0 | 16 | #include <net/rtnetlink.h> |
881d966b | 17 | #include <net/net_namespace.h> |
b854272b | 18 | #include <net/sock.h> |
407af329 | 19 | #include <uapi/linux/if_bridge.h> |
bb900b27 | 20 | |
11dc1f36 | 21 | #include "br_private.h" |
b03b6dd5 | 22 | #include "br_private_stp.h" |
11dc1f36 | 23 | |
25c71c75 | 24 | static inline size_t br_port_info_size(void) |
25 | { | |
26 | return nla_total_size(1) /* IFLA_BRPORT_STATE */ | |
27 | + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */ | |
28 | + nla_total_size(4) /* IFLA_BRPORT_COST */ | |
29 | + nla_total_size(1) /* IFLA_BRPORT_MODE */ | |
a2e01a65 | 30 | + nla_total_size(1) /* IFLA_BRPORT_GUARD */ |
1007dd1a | 31 | + nla_total_size(1) /* IFLA_BRPORT_PROTECT */ |
3da889b6 | 32 | + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */ |
9ba18891 | 33 | + nla_total_size(1) /* IFLA_BRPORT_LEARNING */ |
25c71c75 | 34 | + 0; |
35 | } | |
36 | ||
339bf98f TG |
37 | static inline size_t br_nlmsg_size(void) |
38 | { | |
39 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
25c71c75 | 40 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ |
41 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
42 | + nla_total_size(4) /* IFLA_MASTER */ | |
43 | + nla_total_size(4) /* IFLA_MTU */ | |
44 | + nla_total_size(4) /* IFLA_LINK */ | |
45 | + nla_total_size(1) /* IFLA_OPERSTATE */ | |
46 | + nla_total_size(br_port_info_size()); /* IFLA_PROTINFO */ | |
47 | } | |
48 | ||
49 | static int br_port_fill_attrs(struct sk_buff *skb, | |
50 | const struct net_bridge_port *p) | |
51 | { | |
52 | u8 mode = !!(p->flags & BR_HAIRPIN_MODE); | |
53 | ||
54 | if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) || | |
55 | nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) || | |
56 | nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) || | |
a2e01a65 | 57 | nla_put_u8(skb, IFLA_BRPORT_MODE, mode) || |
1007dd1a | 58 | nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) || |
c2d3babf | 59 | nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) || |
9ba18891 VY |
60 | nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) || |
61 | nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING))) | |
25c71c75 | 62 | return -EMSGSIZE; |
63 | ||
64 | return 0; | |
339bf98f TG |
65 | } |
66 | ||
11dc1f36 SH |
67 | /* |
68 | * Create one netlink message for one interface | |
69 | * Contains port and master info as well as carrier and bridge state. | |
70 | */ | |
6cbdceeb VY |
71 | static int br_fill_ifinfo(struct sk_buff *skb, |
72 | const struct net_bridge_port *port, | |
73 | u32 pid, u32 seq, int event, unsigned int flags, | |
74 | u32 filter_mask, const struct net_device *dev) | |
11dc1f36 | 75 | { |
6cbdceeb | 76 | const struct net_bridge *br; |
74685962 | 77 | struct ifinfomsg *hdr; |
11dc1f36 | 78 | struct nlmsghdr *nlh; |
11dc1f36 | 79 | u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; |
11dc1f36 | 80 | |
6cbdceeb VY |
81 | if (port) |
82 | br = port->br; | |
83 | else | |
84 | br = netdev_priv(dev); | |
85 | ||
28a16c97 | 86 | br_debug(br, "br_fill_info event %d port %s master %s\n", |
87 | event, dev->name, br->dev->name); | |
11dc1f36 | 88 | |
74685962 TG |
89 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); |
90 | if (nlh == NULL) | |
26932566 | 91 | return -EMSGSIZE; |
11dc1f36 | 92 | |
74685962 TG |
93 | hdr = nlmsg_data(nlh); |
94 | hdr->ifi_family = AF_BRIDGE; | |
95 | hdr->__ifi_pad = 0; | |
96 | hdr->ifi_type = dev->type; | |
97 | hdr->ifi_index = dev->ifindex; | |
98 | hdr->ifi_flags = dev_get_flags(dev); | |
99 | hdr->ifi_change = 0; | |
11dc1f36 | 100 | |
2eb812e6 DM |
101 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
102 | nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) || | |
103 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
104 | nla_put_u8(skb, IFLA_OPERSTATE, operstate) || | |
105 | (dev->addr_len && | |
106 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
107 | (dev->ifindex != dev->iflink && | |
25c71c75 | 108 | nla_put_u32(skb, IFLA_LINK, dev->iflink))) |
2eb812e6 | 109 | goto nla_put_failure; |
25c71c75 | 110 | |
6cbdceeb | 111 | if (event == RTM_NEWLINK && port) { |
25c71c75 | 112 | struct nlattr *nest |
113 | = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); | |
114 | ||
115 | if (nest == NULL || br_port_fill_attrs(skb, port) < 0) | |
116 | goto nla_put_failure; | |
117 | nla_nest_end(skb, nest); | |
118 | } | |
119 | ||
6cbdceeb VY |
120 | /* Check if the VID information is requested */ |
121 | if (filter_mask & RTEXT_FILTER_BRVLAN) { | |
122 | struct nlattr *af; | |
123 | const struct net_port_vlans *pv; | |
124 | struct bridge_vlan_info vinfo; | |
125 | u16 vid; | |
552406c4 | 126 | u16 pvid; |
6cbdceeb VY |
127 | |
128 | if (port) | |
129 | pv = nbp_get_vlan_info(port); | |
130 | else | |
131 | pv = br_get_vlan_info(br); | |
132 | ||
133 | if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN)) | |
134 | goto done; | |
135 | ||
136 | af = nla_nest_start(skb, IFLA_AF_SPEC); | |
137 | if (!af) | |
138 | goto nla_put_failure; | |
139 | ||
552406c4 | 140 | pvid = br_get_pvid(pv); |
74694e7b | 141 | for_each_set_bit(vid, pv->vlan_bitmap, BR_VLAN_BITMAP_LEN) { |
6cbdceeb VY |
142 | vinfo.vid = vid; |
143 | vinfo.flags = 0; | |
552406c4 VY |
144 | if (vid == pvid) |
145 | vinfo.flags |= BRIDGE_VLAN_INFO_PVID; | |
35e03f3a VY |
146 | |
147 | if (test_bit(vid, pv->untagged_bitmap)) | |
148 | vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED; | |
149 | ||
6cbdceeb VY |
150 | if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, |
151 | sizeof(vinfo), &vinfo)) | |
152 | goto nla_put_failure; | |
153 | } | |
154 | ||
155 | nla_nest_end(skb, af); | |
156 | } | |
157 | ||
158 | done: | |
74685962 | 159 | return nlmsg_end(skb, nlh); |
11dc1f36 | 160 | |
74685962 | 161 | nla_put_failure: |
26932566 PM |
162 | nlmsg_cancel(skb, nlh); |
163 | return -EMSGSIZE; | |
11dc1f36 SH |
164 | } |
165 | ||
166 | /* | |
167 | * Notify listeners of a change in port information | |
168 | */ | |
169 | void br_ifinfo_notify(int event, struct net_bridge_port *port) | |
170 | { | |
407af329 | 171 | struct net *net; |
11dc1f36 | 172 | struct sk_buff *skb; |
280a306c | 173 | int err = -ENOBUFS; |
11dc1f36 | 174 | |
407af329 VY |
175 | if (!port) |
176 | return; | |
177 | ||
178 | net = dev_net(port->dev); | |
28a16c97 | 179 | br_debug(port->br, "port %u(%s) event %d\n", |
95c96174 | 180 | (unsigned int)port->port_no, port->dev->name, event); |
28a16c97 | 181 | |
339bf98f | 182 | skb = nlmsg_new(br_nlmsg_size(), GFP_ATOMIC); |
280a306c TG |
183 | if (skb == NULL) |
184 | goto errout; | |
185 | ||
6cbdceeb | 186 | err = br_fill_ifinfo(skb, port, 0, 0, event, 0, 0, port->dev); |
26932566 PM |
187 | if (err < 0) { |
188 | /* -EMSGSIZE implies BUG in br_nlmsg_size() */ | |
189 | WARN_ON(err == -EMSGSIZE); | |
190 | kfree_skb(skb); | |
191 | goto errout; | |
192 | } | |
1ce85fe4 PNA |
193 | rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); |
194 | return; | |
280a306c | 195 | errout: |
bea1b42e | 196 | if (err < 0) |
4aa678ba | 197 | rtnl_set_sk_err(net, RTNLGRP_LINK, err); |
11dc1f36 SH |
198 | } |
199 | ||
407af329 | 200 | |
11dc1f36 SH |
201 | /* |
202 | * Dump information about all ports, in response to GETLINK | |
203 | */ | |
e5a55a89 | 204 | int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, |
6cbdceeb | 205 | struct net_device *dev, u32 filter_mask) |
11dc1f36 | 206 | { |
e5a55a89 JF |
207 | int err = 0; |
208 | struct net_bridge_port *port = br_port_get_rcu(dev); | |
209 | ||
6cbdceeb VY |
210 | /* not a bridge port and */ |
211 | if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN)) | |
e5a55a89 | 212 | goto out; |
11dc1f36 | 213 | |
6cbdceeb VY |
214 | err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI, |
215 | filter_mask, dev); | |
e5a55a89 JF |
216 | out: |
217 | return err; | |
11dc1f36 SH |
218 | } |
219 | ||
15004cab | 220 | static const struct nla_policy ifla_br_policy[IFLA_MAX+1] = { |
407af329 VY |
221 | [IFLA_BRIDGE_FLAGS] = { .type = NLA_U16 }, |
222 | [IFLA_BRIDGE_MODE] = { .type = NLA_U16 }, | |
223 | [IFLA_BRIDGE_VLAN_INFO] = { .type = NLA_BINARY, | |
224 | .len = sizeof(struct bridge_vlan_info), }, | |
225 | }; | |
226 | ||
227 | static int br_afspec(struct net_bridge *br, | |
228 | struct net_bridge_port *p, | |
229 | struct nlattr *af_spec, | |
230 | int cmd) | |
231 | { | |
232 | struct nlattr *tb[IFLA_BRIDGE_MAX+1]; | |
233 | int err = 0; | |
234 | ||
235 | err = nla_parse_nested(tb, IFLA_BRIDGE_MAX, af_spec, ifla_br_policy); | |
236 | if (err) | |
237 | return err; | |
238 | ||
239 | if (tb[IFLA_BRIDGE_VLAN_INFO]) { | |
240 | struct bridge_vlan_info *vinfo; | |
241 | ||
242 | vinfo = nla_data(tb[IFLA_BRIDGE_VLAN_INFO]); | |
243 | ||
244 | if (vinfo->vid >= VLAN_N_VID) | |
245 | return -EINVAL; | |
246 | ||
247 | switch (cmd) { | |
248 | case RTM_SETLINK: | |
249 | if (p) { | |
552406c4 | 250 | err = nbp_vlan_add(p, vinfo->vid, vinfo->flags); |
407af329 VY |
251 | if (err) |
252 | break; | |
253 | ||
254 | if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) | |
552406c4 VY |
255 | err = br_vlan_add(p->br, vinfo->vid, |
256 | vinfo->flags); | |
407af329 | 257 | } else |
552406c4 | 258 | err = br_vlan_add(br, vinfo->vid, vinfo->flags); |
407af329 VY |
259 | |
260 | if (err) | |
261 | break; | |
262 | ||
263 | break; | |
264 | ||
265 | case RTM_DELLINK: | |
266 | if (p) { | |
267 | nbp_vlan_delete(p, vinfo->vid); | |
268 | if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) | |
269 | br_vlan_delete(p->br, vinfo->vid); | |
270 | } else | |
271 | br_vlan_delete(br, vinfo->vid); | |
272 | break; | |
273 | } | |
274 | } | |
275 | ||
276 | return err; | |
277 | } | |
278 | ||
25c71c75 | 279 | static const struct nla_policy ifla_brport_policy[IFLA_BRPORT_MAX + 1] = { |
280 | [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, | |
281 | [IFLA_BRPORT_COST] = { .type = NLA_U32 }, | |
282 | [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, | |
283 | [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, | |
a2e01a65 | 284 | [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, |
1007dd1a | 285 | [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, |
9ba18891 | 286 | [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, |
25c71c75 | 287 | }; |
288 | ||
289 | /* Change the state of the port and notify spanning tree */ | |
290 | static int br_set_port_state(struct net_bridge_port *p, u8 state) | |
291 | { | |
292 | if (state > BR_STATE_BLOCKING) | |
293 | return -EINVAL; | |
294 | ||
295 | /* if kernel STP is running, don't allow changes */ | |
296 | if (p->br->stp_enabled == BR_KERNEL_STP) | |
297 | return -EBUSY; | |
298 | ||
576eb625 | 299 | /* if device is not up, change is not allowed |
300 | * if link is not present, only allowable state is disabled | |
301 | */ | |
25c71c75 | 302 | if (!netif_running(p->dev) || |
576eb625 | 303 | (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED)) |
25c71c75 | 304 | return -ENETDOWN; |
305 | ||
306 | p->state = state; | |
307 | br_log_state(p); | |
308 | br_port_state_selection(p->br); | |
309 | return 0; | |
310 | } | |
311 | ||
312 | /* Set/clear or port flags based on attribute */ | |
313 | static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[], | |
314 | int attrtype, unsigned long mask) | |
315 | { | |
316 | if (tb[attrtype]) { | |
317 | u8 flag = nla_get_u8(tb[attrtype]); | |
318 | if (flag) | |
319 | p->flags |= mask; | |
320 | else | |
321 | p->flags &= ~mask; | |
322 | } | |
323 | } | |
324 | ||
325 | /* Process bridge protocol info on port */ | |
326 | static int br_setport(struct net_bridge_port *p, struct nlattr *tb[]) | |
327 | { | |
328 | int err; | |
329 | ||
330 | br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE); | |
a2e01a65 | 331 | br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD); |
c2d3babf | 332 | br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE); |
3d84fa98 | 333 | br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK); |
9ba18891 | 334 | br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING); |
25c71c75 | 335 | |
336 | if (tb[IFLA_BRPORT_COST]) { | |
337 | err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST])); | |
338 | if (err) | |
339 | return err; | |
340 | } | |
341 | ||
342 | if (tb[IFLA_BRPORT_PRIORITY]) { | |
343 | err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY])); | |
344 | if (err) | |
345 | return err; | |
346 | } | |
347 | ||
348 | if (tb[IFLA_BRPORT_STATE]) { | |
349 | err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE])); | |
350 | if (err) | |
351 | return err; | |
352 | } | |
353 | return 0; | |
354 | } | |
355 | ||
356 | /* Change state and parameters on port. */ | |
e5a55a89 | 357 | int br_setlink(struct net_device *dev, struct nlmsghdr *nlh) |
11dc1f36 | 358 | { |
74685962 | 359 | struct nlattr *protinfo; |
407af329 | 360 | struct nlattr *afspec; |
11dc1f36 | 361 | struct net_bridge_port *p; |
2062cc20 | 362 | struct nlattr *tb[IFLA_BRPORT_MAX + 1]; |
7b99a993 | 363 | int err = 0; |
11dc1f36 | 364 | |
c60ee67f H |
365 | protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO); |
366 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); | |
407af329 | 367 | if (!protinfo && !afspec) |
25c71c75 | 368 | return 0; |
11dc1f36 | 369 | |
ec1e5610 | 370 | p = br_port_get_rtnl(dev); |
407af329 VY |
371 | /* We want to accept dev as bridge itself if the AF_SPEC |
372 | * is set to see if someone is setting vlan info on the brigde | |
373 | */ | |
7b99a993 | 374 | if (!p && !afspec) |
b5ed54e9 | 375 | return -EINVAL; |
11dc1f36 | 376 | |
407af329 VY |
377 | if (p && protinfo) { |
378 | if (protinfo->nla_type & NLA_F_NESTED) { | |
379 | err = nla_parse_nested(tb, IFLA_BRPORT_MAX, | |
380 | protinfo, ifla_brport_policy); | |
381 | if (err) | |
382 | return err; | |
383 | ||
384 | spin_lock_bh(&p->br->lock); | |
385 | err = br_setport(p, tb); | |
386 | spin_unlock_bh(&p->br->lock); | |
387 | } else { | |
388 | /* Binary compatability with old RSTP */ | |
389 | if (nla_len(protinfo) < sizeof(u8)) | |
390 | return -EINVAL; | |
391 | ||
392 | spin_lock_bh(&p->br->lock); | |
393 | err = br_set_port_state(p, nla_get_u8(protinfo)); | |
394 | spin_unlock_bh(&p->br->lock); | |
395 | } | |
25c71c75 | 396 | if (err) |
407af329 VY |
397 | goto out; |
398 | } | |
11dc1f36 | 399 | |
407af329 VY |
400 | if (afspec) { |
401 | err = br_afspec((struct net_bridge *)netdev_priv(dev), p, | |
402 | afspec, RTM_SETLINK); | |
25c71c75 | 403 | } |
b03b6dd5 | 404 | |
25c71c75 | 405 | if (err == 0) |
406 | br_ifinfo_notify(RTM_NEWLINK, p); | |
b03b6dd5 | 407 | |
407af329 | 408 | out: |
25c71c75 | 409 | return err; |
11dc1f36 SH |
410 | } |
411 | ||
407af329 VY |
412 | /* Delete port information */ |
413 | int br_dellink(struct net_device *dev, struct nlmsghdr *nlh) | |
414 | { | |
407af329 VY |
415 | struct nlattr *afspec; |
416 | struct net_bridge_port *p; | |
417 | int err; | |
418 | ||
c60ee67f | 419 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); |
407af329 VY |
420 | if (!afspec) |
421 | return 0; | |
422 | ||
423 | p = br_port_get_rtnl(dev); | |
424 | /* We want to accept dev as bridge itself as well */ | |
425 | if (!p && !(dev->priv_flags & IFF_EBRIDGE)) | |
426 | return -EINVAL; | |
427 | ||
428 | err = br_afspec((struct net_bridge *)netdev_priv(dev), p, | |
429 | afspec, RTM_DELLINK); | |
430 | ||
431 | return err; | |
432 | } | |
bb900b27 | 433 | static int br_validate(struct nlattr *tb[], struct nlattr *data[]) |
434 | { | |
435 | if (tb[IFLA_ADDRESS]) { | |
436 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
437 | return -EINVAL; | |
438 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
439 | return -EADDRNOTAVAIL; | |
440 | } | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
6cbdceeb VY |
445 | static size_t br_get_link_af_size(const struct net_device *dev) |
446 | { | |
447 | struct net_port_vlans *pv; | |
448 | ||
449 | if (br_port_exists(dev)) | |
450 | pv = nbp_get_vlan_info(br_port_get_rcu(dev)); | |
451 | else if (dev->priv_flags & IFF_EBRIDGE) | |
452 | pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev)); | |
453 | else | |
454 | return 0; | |
455 | ||
456 | if (!pv) | |
457 | return 0; | |
458 | ||
459 | /* Each VLAN is returned in bridge_vlan_info along with flags */ | |
460 | return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info)); | |
461 | } | |
462 | ||
15004cab | 463 | static struct rtnl_af_ops br_af_ops = { |
6cbdceeb VY |
464 | .family = AF_BRIDGE, |
465 | .get_link_af_size = br_get_link_af_size, | |
466 | }; | |
467 | ||
149ddd83 | 468 | struct rtnl_link_ops br_link_ops __read_mostly = { |
bb900b27 | 469 | .kind = "bridge", |
470 | .priv_size = sizeof(struct net_bridge), | |
471 | .setup = br_dev_setup, | |
472 | .validate = br_validate, | |
1ce5cce8 | 473 | .dellink = br_dev_delete, |
bb900b27 | 474 | }; |
11dc1f36 | 475 | |
32fe21c0 | 476 | int __init br_netlink_init(void) |
11dc1f36 | 477 | { |
3ec8e9f0 VY |
478 | int err; |
479 | ||
480 | br_mdb_init(); | |
6cbdceeb | 481 | err = rtnl_af_register(&br_af_ops); |
3ec8e9f0 VY |
482 | if (err) |
483 | goto out; | |
484 | ||
6cbdceeb VY |
485 | err = rtnl_link_register(&br_link_ops); |
486 | if (err) | |
487 | goto out_af; | |
488 | ||
3ec8e9f0 | 489 | return 0; |
6cbdceeb VY |
490 | |
491 | out_af: | |
492 | rtnl_af_unregister(&br_af_ops); | |
3ec8e9f0 VY |
493 | out: |
494 | br_mdb_uninit(); | |
495 | return err; | |
11dc1f36 SH |
496 | } |
497 | ||
498 | void __exit br_netlink_fini(void) | |
499 | { | |
3ec8e9f0 | 500 | br_mdb_uninit(); |
6cbdceeb | 501 | rtnl_af_unregister(&br_af_ops); |
bb900b27 | 502 | rtnl_link_unregister(&br_link_ops); |
11dc1f36 | 503 | } |