blob: 299fc5f40a26c12ef39786d8bc3885c0c96ca7be [file] [log] [blame]
Stephen Hemminger11dc1f32006-05-25 16:00:12 -07001/*
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
stephen hemmingerbb900b22011-04-04 14:03:32 +000015#include <linux/etherdevice.h>
Thomas Graf32fe21c2007-03-22 11:59:03 -070016#include <net/rtnetlink.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070017#include <net/net_namespace.h>
Denis V. Lunevb8542722007-12-01 00:21:31 +110018#include <net/sock.h>
Vlad Yasevich407af322013-02-13 12:00:12 +000019#include <uapi/linux/if_bridge.h>
stephen hemmingerbb900b22011-04-04 14:03:32 +000020
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070021#include "br_private.h"
Vitalii Demianetsb03b6dd2011-11-25 00:16:37 +000022#include "br_private_stp.h"
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070023
stephen hemminger25c71c72012-11-13 07:53:05 +000024static 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 */
stephen hemmingera2e01a62012-11-13 07:53:07 +000030 + nla_total_size(1) /* IFLA_BRPORT_GUARD */
stephen hemminger1007dd12012-11-13 07:53:08 +000031 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
stephen hemminger3da889b2013-03-11 13:52:17 +000032 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
stephen hemminger25c71c72012-11-13 07:53:05 +000033 + 0;
34}
35
Thomas Graf339bf982006-11-10 14:10:15 -080036static inline size_t br_nlmsg_size(void)
37{
38 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
stephen hemminger25c71c72012-11-13 07:53:05 +000039 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
40 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
41 + nla_total_size(4) /* IFLA_MASTER */
42 + nla_total_size(4) /* IFLA_MTU */
43 + nla_total_size(4) /* IFLA_LINK */
44 + nla_total_size(1) /* IFLA_OPERSTATE */
45 + nla_total_size(br_port_info_size()); /* IFLA_PROTINFO */
46}
47
48static int br_port_fill_attrs(struct sk_buff *skb,
49 const struct net_bridge_port *p)
50{
51 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
52
53 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
54 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
55 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
stephen hemmingera2e01a62012-11-13 07:53:07 +000056 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
stephen hemminger1007dd12012-11-13 07:53:08 +000057 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
David S. Millerc2d3bab2012-12-05 16:24:45 -050058 nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
59 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)))
stephen hemminger25c71c72012-11-13 07:53:05 +000060 return -EMSGSIZE;
61
62 return 0;
Thomas Graf339bf982006-11-10 14:10:15 -080063}
64
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070065/*
66 * Create one netlink message for one interface
67 * Contains port and master info as well as carrier and bridge state.
68 */
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +000069static int br_fill_ifinfo(struct sk_buff *skb,
70 const struct net_bridge_port *port,
71 u32 pid, u32 seq, int event, unsigned int flags,
72 u32 filter_mask, const struct net_device *dev)
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070073{
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +000074 const struct net_bridge *br;
Thomas Graf74685962006-11-20 16:20:22 -080075 struct ifinfomsg *hdr;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070076 struct nlmsghdr *nlh;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070077 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070078
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +000079 if (port)
80 br = port->br;
81 else
82 br = netdev_priv(dev);
83
stephen hemminger28a16c92010-05-10 09:31:09 +000084 br_debug(br, "br_fill_info event %d port %s master %s\n",
85 event, dev->name, br->dev->name);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070086
Thomas Graf74685962006-11-20 16:20:22 -080087 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
88 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -080089 return -EMSGSIZE;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070090
Thomas Graf74685962006-11-20 16:20:22 -080091 hdr = nlmsg_data(nlh);
92 hdr->ifi_family = AF_BRIDGE;
93 hdr->__ifi_pad = 0;
94 hdr->ifi_type = dev->type;
95 hdr->ifi_index = dev->ifindex;
96 hdr->ifi_flags = dev_get_flags(dev);
97 hdr->ifi_change = 0;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070098
David S. Miller2eb812e2012-04-01 20:49:54 -040099 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
100 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
101 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
102 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
103 (dev->addr_len &&
104 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
105 (dev->ifindex != dev->iflink &&
stephen hemminger25c71c72012-11-13 07:53:05 +0000106 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
David S. Miller2eb812e2012-04-01 20:49:54 -0400107 goto nla_put_failure;
stephen hemminger25c71c72012-11-13 07:53:05 +0000108
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000109 if (event == RTM_NEWLINK && port) {
stephen hemminger25c71c72012-11-13 07:53:05 +0000110 struct nlattr *nest
111 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
112
113 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
114 goto nla_put_failure;
115 nla_nest_end(skb, nest);
116 }
117
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000118 /* Check if the VID information is requested */
119 if (filter_mask & RTEXT_FILTER_BRVLAN) {
120 struct nlattr *af;
121 const struct net_port_vlans *pv;
122 struct bridge_vlan_info vinfo;
123 u16 vid;
Vlad Yasevich552406c2013-02-13 12:00:15 +0000124 u16 pvid;
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000125
126 if (port)
127 pv = nbp_get_vlan_info(port);
128 else
129 pv = br_get_vlan_info(br);
130
131 if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN))
132 goto done;
133
134 af = nla_nest_start(skb, IFLA_AF_SPEC);
135 if (!af)
136 goto nla_put_failure;
137
Vlad Yasevich552406c2013-02-13 12:00:15 +0000138 pvid = br_get_pvid(pv);
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000139 for (vid = find_first_bit(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN);
140 vid < BR_VLAN_BITMAP_LEN;
141 vid = find_next_bit(pv->vlan_bitmap,
142 BR_VLAN_BITMAP_LEN, vid+1)) {
143 vinfo.vid = vid;
144 vinfo.flags = 0;
Vlad Yasevich552406c2013-02-13 12:00:15 +0000145 if (vid == pvid)
146 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
Vlad Yasevich35e03f32013-02-13 12:00:20 +0000147
148 if (test_bit(vid, pv->untagged_bitmap))
149 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
150
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000151 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
152 sizeof(vinfo), &vinfo))
153 goto nla_put_failure;
154 }
155
156 nla_nest_end(skb, af);
157 }
158
159done:
Thomas Graf74685962006-11-20 16:20:22 -0800160 return nlmsg_end(skb, nlh);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700161
Thomas Graf74685962006-11-20 16:20:22 -0800162nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -0800163 nlmsg_cancel(skb, nlh);
164 return -EMSGSIZE;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700165}
166
167/*
168 * Notify listeners of a change in port information
169 */
170void br_ifinfo_notify(int event, struct net_bridge_port *port)
171{
Vlad Yasevich407af322013-02-13 12:00:12 +0000172 struct net *net;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700173 struct sk_buff *skb;
Thomas Graf280a3062006-08-15 00:36:28 -0700174 int err = -ENOBUFS;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700175
Vlad Yasevich407af322013-02-13 12:00:12 +0000176 if (!port)
177 return;
178
179 net = dev_net(port->dev);
stephen hemminger28a16c92010-05-10 09:31:09 +0000180 br_debug(port->br, "port %u(%s) event %d\n",
Eric Dumazet95c96172012-04-15 05:58:06 +0000181 (unsigned int)port->port_no, port->dev->name, event);
stephen hemminger28a16c92010-05-10 09:31:09 +0000182
Thomas Graf339bf982006-11-10 14:10:15 -0800183 skb = nlmsg_new(br_nlmsg_size(), GFP_ATOMIC);
Thomas Graf280a3062006-08-15 00:36:28 -0700184 if (skb == NULL)
185 goto errout;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700186
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000187 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, 0, port->dev);
Patrick McHardy26932562007-01-31 23:16:40 -0800188 if (err < 0) {
189 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
190 WARN_ON(err == -EMSGSIZE);
191 kfree_skb(skb);
192 goto errout;
193 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800194 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
195 return;
Thomas Graf280a3062006-08-15 00:36:28 -0700196errout:
Stephen Hemmingerbea1b422006-08-03 16:24:02 -0700197 if (err < 0)
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700198 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700199}
200
Vlad Yasevich407af322013-02-13 12:00:12 +0000201
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700202/*
203 * Dump information about all ports, in response to GETLINK
204 */
John Fastabende5a55a82012-10-24 08:12:57 +0000205int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000206 struct net_device *dev, u32 filter_mask)
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700207{
John Fastabende5a55a82012-10-24 08:12:57 +0000208 int err = 0;
209 struct net_bridge_port *port = br_port_get_rcu(dev);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700210
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000211 /* not a bridge port and */
212 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN))
John Fastabende5a55a82012-10-24 08:12:57 +0000213 goto out;
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000214
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000215 err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI,
216 filter_mask, dev);
John Fastabende5a55a82012-10-24 08:12:57 +0000217out:
218 return err;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700219}
220
Cong Wang15004ca2013-02-13 19:57:12 +0000221static const struct nla_policy ifla_br_policy[IFLA_MAX+1] = {
Vlad Yasevich407af322013-02-13 12:00:12 +0000222 [IFLA_BRIDGE_FLAGS] = { .type = NLA_U16 },
223 [IFLA_BRIDGE_MODE] = { .type = NLA_U16 },
224 [IFLA_BRIDGE_VLAN_INFO] = { .type = NLA_BINARY,
225 .len = sizeof(struct bridge_vlan_info), },
226};
227
228static int br_afspec(struct net_bridge *br,
229 struct net_bridge_port *p,
230 struct nlattr *af_spec,
231 int cmd)
232{
233 struct nlattr *tb[IFLA_BRIDGE_MAX+1];
234 int err = 0;
235
236 err = nla_parse_nested(tb, IFLA_BRIDGE_MAX, af_spec, ifla_br_policy);
237 if (err)
238 return err;
239
240 if (tb[IFLA_BRIDGE_VLAN_INFO]) {
241 struct bridge_vlan_info *vinfo;
242
243 vinfo = nla_data(tb[IFLA_BRIDGE_VLAN_INFO]);
244
245 if (vinfo->vid >= VLAN_N_VID)
246 return -EINVAL;
247
248 switch (cmd) {
249 case RTM_SETLINK:
250 if (p) {
Vlad Yasevich552406c2013-02-13 12:00:15 +0000251 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
Vlad Yasevich407af322013-02-13 12:00:12 +0000252 if (err)
253 break;
254
255 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
Vlad Yasevich552406c2013-02-13 12:00:15 +0000256 err = br_vlan_add(p->br, vinfo->vid,
257 vinfo->flags);
Vlad Yasevich407af322013-02-13 12:00:12 +0000258 } else
Vlad Yasevich552406c2013-02-13 12:00:15 +0000259 err = br_vlan_add(br, vinfo->vid, vinfo->flags);
Vlad Yasevich407af322013-02-13 12:00:12 +0000260
261 if (err)
262 break;
263
264 break;
265
266 case RTM_DELLINK:
267 if (p) {
268 nbp_vlan_delete(p, vinfo->vid);
269 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
270 br_vlan_delete(p->br, vinfo->vid);
271 } else
272 br_vlan_delete(br, vinfo->vid);
273 break;
274 }
275 }
276
277 return err;
278}
279
stephen hemminger25c71c72012-11-13 07:53:05 +0000280static const struct nla_policy ifla_brport_policy[IFLA_BRPORT_MAX + 1] = {
281 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
282 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
283 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
284 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
stephen hemmingera2e01a62012-11-13 07:53:07 +0000285 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
stephen hemminger1007dd12012-11-13 07:53:08 +0000286 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
stephen hemminger25c71c72012-11-13 07:53:05 +0000287};
288
289/* Change the state of the port and notify spanning tree */
290static int br_set_port_state(struct net_bridge_port *p, u8 state)
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700291{
stephen hemminger25c71c72012-11-13 07:53:05 +0000292 if (state > BR_STATE_BLOCKING)
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000293 return -EINVAL;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700294
295 /* if kernel STP is running, don't allow changes */
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700296 if (p->br->stp_enabled == BR_KERNEL_STP)
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700297 return -EBUSY;
298
stephen hemminger576eb622012-12-28 18:15:22 +0000299 /* if device is not up, change is not allowed
300 * if link is not present, only allowable state is disabled
301 */
stephen hemminger25c71c72012-11-13 07:53:05 +0000302 if (!netif_running(p->dev) ||
stephen hemminger576eb622012-12-28 18:15:22 +0000303 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700304 return -ENETDOWN;
305
stephen hemminger25c71c72012-11-13 07:53:05 +0000306 p->state = state;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700307 br_log_state(p);
Vitalii Demianetsb03b6dd2011-11-25 00:16:37 +0000308 br_port_state_selection(p->br);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700309 return 0;
310}
311
stephen hemminger25c71c72012-11-13 07:53:05 +0000312/* Set/clear or port flags based on attribute */
313static 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 */
326static 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);
stephen hemmingera2e01a62012-11-13 07:53:07 +0000331 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
David S. Millerc2d3bab2012-12-05 16:24:45 -0500332 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
Vlad Yasevich3d84fa92013-03-15 06:39:12 +0000333 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
stephen hemminger25c71c72012-11-13 07:53:05 +0000334
335 if (tb[IFLA_BRPORT_COST]) {
336 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
337 if (err)
338 return err;
339 }
340
341 if (tb[IFLA_BRPORT_PRIORITY]) {
342 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
343 if (err)
344 return err;
345 }
346
347 if (tb[IFLA_BRPORT_STATE]) {
348 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
349 if (err)
350 return err;
351 }
352 return 0;
353}
354
355/* Change state and parameters on port. */
356int br_setlink(struct net_device *dev, struct nlmsghdr *nlh)
357{
358 struct ifinfomsg *ifm;
359 struct nlattr *protinfo;
Vlad Yasevich407af322013-02-13 12:00:12 +0000360 struct nlattr *afspec;
stephen hemminger25c71c72012-11-13 07:53:05 +0000361 struct net_bridge_port *p;
Dan Carpenter2062cc22012-12-07 01:10:46 +0000362 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
stephen hemminger25c71c72012-11-13 07:53:05 +0000363 int err;
364
365 ifm = nlmsg_data(nlh);
366
367 protinfo = nlmsg_find_attr(nlh, sizeof(*ifm), IFLA_PROTINFO);
Vlad Yasevich407af322013-02-13 12:00:12 +0000368 afspec = nlmsg_find_attr(nlh, sizeof(*ifm), IFLA_AF_SPEC);
369 if (!protinfo && !afspec)
stephen hemminger25c71c72012-11-13 07:53:05 +0000370 return 0;
371
372 p = br_port_get_rtnl(dev);
Vlad Yasevich407af322013-02-13 12:00:12 +0000373 /* We want to accept dev as bridge itself if the AF_SPEC
374 * is set to see if someone is setting vlan info on the brigde
375 */
376 if (!p && ((dev->priv_flags & IFF_EBRIDGE) && !afspec))
stephen hemminger25c71c72012-11-13 07:53:05 +0000377 return -EINVAL;
378
Vlad Yasevich407af322013-02-13 12:00:12 +0000379 if (p && protinfo) {
380 if (protinfo->nla_type & NLA_F_NESTED) {
381 err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
382 protinfo, ifla_brport_policy);
383 if (err)
384 return err;
385
386 spin_lock_bh(&p->br->lock);
387 err = br_setport(p, tb);
388 spin_unlock_bh(&p->br->lock);
389 } else {
390 /* Binary compatability with old RSTP */
391 if (nla_len(protinfo) < sizeof(u8))
392 return -EINVAL;
393
394 spin_lock_bh(&p->br->lock);
395 err = br_set_port_state(p, nla_get_u8(protinfo));
396 spin_unlock_bh(&p->br->lock);
397 }
stephen hemminger25c71c72012-11-13 07:53:05 +0000398 if (err)
Vlad Yasevich407af322013-02-13 12:00:12 +0000399 goto out;
400 }
stephen hemminger25c71c72012-11-13 07:53:05 +0000401
Vlad Yasevich407af322013-02-13 12:00:12 +0000402 if (afspec) {
403 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
404 afspec, RTM_SETLINK);
stephen hemminger25c71c72012-11-13 07:53:05 +0000405 }
406
407 if (err == 0)
408 br_ifinfo_notify(RTM_NEWLINK, p);
409
Vlad Yasevich407af322013-02-13 12:00:12 +0000410out:
stephen hemminger25c71c72012-11-13 07:53:05 +0000411 return err;
412}
413
Vlad Yasevich407af322013-02-13 12:00:12 +0000414/* Delete port information */
415int br_dellink(struct net_device *dev, struct nlmsghdr *nlh)
416{
417 struct ifinfomsg *ifm;
418 struct nlattr *afspec;
419 struct net_bridge_port *p;
420 int err;
421
422 ifm = nlmsg_data(nlh);
423
424 afspec = nlmsg_find_attr(nlh, sizeof(*ifm), IFLA_AF_SPEC);
425 if (!afspec)
426 return 0;
427
428 p = br_port_get_rtnl(dev);
429 /* We want to accept dev as bridge itself as well */
430 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
431 return -EINVAL;
432
433 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
434 afspec, RTM_DELLINK);
435
436 return err;
437}
stephen hemmingerbb900b22011-04-04 14:03:32 +0000438static int br_validate(struct nlattr *tb[], struct nlattr *data[])
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700439{
stephen hemmingerbb900b22011-04-04 14:03:32 +0000440 if (tb[IFLA_ADDRESS]) {
441 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
442 return -EINVAL;
443 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
444 return -EADDRNOTAVAIL;
445 }
Thomas Graf32fe21c2007-03-22 11:59:03 -0700446
447 return 0;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700448}
449
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000450static size_t br_get_link_af_size(const struct net_device *dev)
451{
452 struct net_port_vlans *pv;
453
454 if (br_port_exists(dev))
455 pv = nbp_get_vlan_info(br_port_get_rcu(dev));
456 else if (dev->priv_flags & IFF_EBRIDGE)
457 pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
458 else
459 return 0;
460
461 if (!pv)
462 return 0;
463
464 /* Each VLAN is returned in bridge_vlan_info along with flags */
465 return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
466}
467
Cong Wang15004ca2013-02-13 19:57:12 +0000468static struct rtnl_af_ops br_af_ops = {
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000469 .family = AF_BRIDGE,
470 .get_link_af_size = br_get_link_af_size,
471};
472
stephen hemminger149ddd82012-06-26 05:48:45 +0000473struct rtnl_link_ops br_link_ops __read_mostly = {
stephen hemmingerbb900b22011-04-04 14:03:32 +0000474 .kind = "bridge",
475 .priv_size = sizeof(struct net_bridge),
476 .setup = br_dev_setup,
477 .validate = br_validate,
stephen hemminger1ce5cce2011-10-06 11:19:41 +0000478 .dellink = br_dev_delete,
stephen hemmingerbb900b22011-04-04 14:03:32 +0000479};
480
481int __init br_netlink_init(void)
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700482{
Vlad Yasevich3ec8e9f2013-01-02 09:41:25 +0000483 int err;
484
485 br_mdb_init();
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000486 err = rtnl_af_register(&br_af_ops);
Vlad Yasevich3ec8e9f2013-01-02 09:41:25 +0000487 if (err)
488 goto out;
489
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000490 err = rtnl_link_register(&br_link_ops);
491 if (err)
492 goto out_af;
493
Vlad Yasevich3ec8e9f2013-01-02 09:41:25 +0000494 return 0;
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000495
496out_af:
497 rtnl_af_unregister(&br_af_ops);
Vlad Yasevich3ec8e9f2013-01-02 09:41:25 +0000498out:
499 br_mdb_uninit();
500 return err;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700501}
502
stephen hemmingerbb900b22011-04-04 14:03:32 +0000503void __exit br_netlink_fini(void)
504{
Vlad Yasevich3ec8e9f2013-01-02 09:41:25 +0000505 br_mdb_uninit();
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000506 rtnl_af_unregister(&br_af_ops);
stephen hemmingerbb900b22011-04-04 14:03:32 +0000507 rtnl_link_unregister(&br_link_ops);
stephen hemmingerbb900b22011-04-04 14:03:32 +0000508}