blob: e8844d975b321ac4e3f6a0cca76035918ec93a1b [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 */
Vlad Yasevich9ba18892013-06-05 10:08:00 -040033 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
Vlad Yasevich867a5942013-06-05 10:08:01 -040034 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
stephen hemminger25c71c72012-11-13 07:53:05 +000035 + 0;
36}
37
Thomas Graf339bf982006-11-10 14:10:15 -080038static inline size_t br_nlmsg_size(void)
39{
40 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
stephen hemminger25c71c72012-11-13 07:53:05 +000041 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
42 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
43 + nla_total_size(4) /* IFLA_MASTER */
44 + nla_total_size(4) /* IFLA_MTU */
45 + nla_total_size(4) /* IFLA_LINK */
46 + nla_total_size(1) /* IFLA_OPERSTATE */
47 + nla_total_size(br_port_info_size()); /* IFLA_PROTINFO */
48}
49
50static int br_port_fill_attrs(struct sk_buff *skb,
51 const struct net_bridge_port *p)
52{
53 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
54
55 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
56 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
57 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
stephen hemmingera2e01a62012-11-13 07:53:07 +000058 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
stephen hemminger1007dd12012-11-13 07:53:08 +000059 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
David S. Millerc2d3bab2012-12-05 16:24:45 -050060 nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
Vlad Yasevich9ba18892013-06-05 10:08:00 -040061 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
Vlad Yasevich867a5942013-06-05 10:08:01 -040062 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
63 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)))
stephen hemminger25c71c72012-11-13 07:53:05 +000064 return -EMSGSIZE;
65
66 return 0;
Thomas Graf339bf982006-11-10 14:10:15 -080067}
68
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070069/*
70 * Create one netlink message for one interface
71 * Contains port and master info as well as carrier and bridge state.
72 */
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +000073static int br_fill_ifinfo(struct sk_buff *skb,
74 const struct net_bridge_port *port,
75 u32 pid, u32 seq, int event, unsigned int flags,
76 u32 filter_mask, const struct net_device *dev)
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070077{
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +000078 const struct net_bridge *br;
Thomas Graf74685962006-11-20 16:20:22 -080079 struct ifinfomsg *hdr;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070080 struct nlmsghdr *nlh;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070081 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070082
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +000083 if (port)
84 br = port->br;
85 else
86 br = netdev_priv(dev);
87
stephen hemminger28a16c92010-05-10 09:31:09 +000088 br_debug(br, "br_fill_info event %d port %s master %s\n",
89 event, dev->name, br->dev->name);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070090
Thomas Graf74685962006-11-20 16:20:22 -080091 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
92 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -080093 return -EMSGSIZE;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -070094
Thomas Graf74685962006-11-20 16:20:22 -080095 hdr = nlmsg_data(nlh);
96 hdr->ifi_family = AF_BRIDGE;
97 hdr->__ifi_pad = 0;
98 hdr->ifi_type = dev->type;
99 hdr->ifi_index = dev->ifindex;
100 hdr->ifi_flags = dev_get_flags(dev);
101 hdr->ifi_change = 0;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700102
David S. Miller2eb812e2012-04-01 20:49:54 -0400103 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
104 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
105 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
106 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
107 (dev->addr_len &&
108 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
109 (dev->ifindex != dev->iflink &&
stephen hemminger25c71c72012-11-13 07:53:05 +0000110 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
David S. Miller2eb812e2012-04-01 20:49:54 -0400111 goto nla_put_failure;
stephen hemminger25c71c72012-11-13 07:53:05 +0000112
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000113 if (event == RTM_NEWLINK && port) {
stephen hemminger25c71c72012-11-13 07:53:05 +0000114 struct nlattr *nest
115 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
116
117 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
118 goto nla_put_failure;
119 nla_nest_end(skb, nest);
120 }
121
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000122 /* Check if the VID information is requested */
123 if (filter_mask & RTEXT_FILTER_BRVLAN) {
124 struct nlattr *af;
125 const struct net_port_vlans *pv;
126 struct bridge_vlan_info vinfo;
127 u16 vid;
Vlad Yasevich552406c2013-02-13 12:00:15 +0000128 u16 pvid;
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000129
130 if (port)
131 pv = nbp_get_vlan_info(port);
132 else
133 pv = br_get_vlan_info(br);
134
Toshiaki Makitaef40b7e2013-08-20 17:10:18 +0900135 if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID))
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000136 goto done;
137
138 af = nla_nest_start(skb, IFLA_AF_SPEC);
139 if (!af)
140 goto nla_put_failure;
141
Vlad Yasevich552406c2013-02-13 12:00:15 +0000142 pvid = br_get_pvid(pv);
Toshiaki Makitaef40b7e2013-08-20 17:10:18 +0900143 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000144 vinfo.vid = vid;
145 vinfo.flags = 0;
Vlad Yasevich552406c2013-02-13 12:00:15 +0000146 if (vid == pvid)
147 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
Vlad Yasevich35e03f32013-02-13 12:00:20 +0000148
149 if (test_bit(vid, pv->untagged_bitmap))
150 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
151
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000152 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
153 sizeof(vinfo), &vinfo))
154 goto nla_put_failure;
155 }
156
157 nla_nest_end(skb, af);
158 }
159
160done:
Thomas Graf74685962006-11-20 16:20:22 -0800161 return nlmsg_end(skb, nlh);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700162
Thomas Graf74685962006-11-20 16:20:22 -0800163nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -0800164 nlmsg_cancel(skb, nlh);
165 return -EMSGSIZE;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700166}
167
168/*
169 * Notify listeners of a change in port information
170 */
171void br_ifinfo_notify(int event, struct net_bridge_port *port)
172{
Vlad Yasevich407af322013-02-13 12:00:12 +0000173 struct net *net;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700174 struct sk_buff *skb;
Thomas Graf280a3062006-08-15 00:36:28 -0700175 int err = -ENOBUFS;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700176
Vlad Yasevich407af322013-02-13 12:00:12 +0000177 if (!port)
178 return;
179
180 net = dev_net(port->dev);
stephen hemminger28a16c92010-05-10 09:31:09 +0000181 br_debug(port->br, "port %u(%s) event %d\n",
Eric Dumazet95c96172012-04-15 05:58:06 +0000182 (unsigned int)port->port_no, port->dev->name, event);
stephen hemminger28a16c92010-05-10 09:31:09 +0000183
Thomas Graf339bf982006-11-10 14:10:15 -0800184 skb = nlmsg_new(br_nlmsg_size(), GFP_ATOMIC);
Thomas Graf280a3062006-08-15 00:36:28 -0700185 if (skb == NULL)
186 goto errout;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700187
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000188 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, 0, port->dev);
Patrick McHardy26932562007-01-31 23:16:40 -0800189 if (err < 0) {
190 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
191 WARN_ON(err == -EMSGSIZE);
192 kfree_skb(skb);
193 goto errout;
194 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800195 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
196 return;
Thomas Graf280a3062006-08-15 00:36:28 -0700197errout:
tanxiaojun87e823b2013-12-19 13:28:10 +0800198 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;
Hong Zhiguo1fb17542013-09-14 22:42:27 +0800209 struct net_bridge_port *port = br_port_get_rtnl(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
Toshiaki Makita8adff412013-10-16 17:07:13 +0900245 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
Vlad Yasevich407af322013-02-13 12:00:12 +0000246 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 },
Vlad Yasevich9ba18892013-06-05 10:08:00 -0400287 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
Vlad Yasevich867a5942013-06-05 10:08:01 -0400288 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
stephen hemminger25c71c72012-11-13 07:53:05 +0000289};
290
291/* Change the state of the port and notify spanning tree */
292static int br_set_port_state(struct net_bridge_port *p, u8 state)
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700293{
stephen hemminger25c71c72012-11-13 07:53:05 +0000294 if (state > BR_STATE_BLOCKING)
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000295 return -EINVAL;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700296
297 /* if kernel STP is running, don't allow changes */
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700298 if (p->br->stp_enabled == BR_KERNEL_STP)
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700299 return -EBUSY;
300
stephen hemminger576eb622012-12-28 18:15:22 +0000301 /* if device is not up, change is not allowed
302 * if link is not present, only allowable state is disabled
303 */
stephen hemminger25c71c72012-11-13 07:53:05 +0000304 if (!netif_running(p->dev) ||
stephen hemminger576eb622012-12-28 18:15:22 +0000305 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700306 return -ENETDOWN;
307
stephen hemminger25c71c72012-11-13 07:53:05 +0000308 p->state = state;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700309 br_log_state(p);
Vitalii Demianetsb03b6dd2011-11-25 00:16:37 +0000310 br_port_state_selection(p->br);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700311 return 0;
312}
313
stephen hemminger25c71c72012-11-13 07:53:05 +0000314/* Set/clear or port flags based on attribute */
315static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
316 int attrtype, unsigned long mask)
317{
318 if (tb[attrtype]) {
319 u8 flag = nla_get_u8(tb[attrtype]);
320 if (flag)
321 p->flags |= mask;
322 else
323 p->flags &= ~mask;
324 }
325}
326
327/* Process bridge protocol info on port */
328static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
329{
330 int err;
331
332 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
stephen hemmingera2e01a62012-11-13 07:53:07 +0000333 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
David S. Millerc2d3bab2012-12-05 16:24:45 -0500334 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
Vlad Yasevich3d84fa92013-03-15 06:39:12 +0000335 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
Vlad Yasevich9ba18892013-06-05 10:08:00 -0400336 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
Vlad Yasevich867a5942013-06-05 10:08:01 -0400337 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
stephen hemminger25c71c72012-11-13 07:53:05 +0000338
339 if (tb[IFLA_BRPORT_COST]) {
340 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
341 if (err)
342 return err;
343 }
344
345 if (tb[IFLA_BRPORT_PRIORITY]) {
346 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
347 if (err)
348 return err;
349 }
350
351 if (tb[IFLA_BRPORT_STATE]) {
352 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
353 if (err)
354 return err;
355 }
356 return 0;
357}
358
359/* Change state and parameters on port. */
360int br_setlink(struct net_device *dev, struct nlmsghdr *nlh)
361{
stephen hemminger25c71c72012-11-13 07:53:05 +0000362 struct nlattr *protinfo;
Vlad Yasevich407af322013-02-13 12:00:12 +0000363 struct nlattr *afspec;
stephen hemminger25c71c72012-11-13 07:53:05 +0000364 struct net_bridge_port *p;
Dan Carpenter2062cc22012-12-07 01:10:46 +0000365 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
Hong zhi guo7b99a992013-03-24 03:26:47 +0000366 int err = 0;
stephen hemminger25c71c72012-11-13 07:53:05 +0000367
Hong zhi guoc60ee672013-03-28 06:21:22 +0000368 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
369 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
Vlad Yasevich407af322013-02-13 12:00:12 +0000370 if (!protinfo && !afspec)
stephen hemminger25c71c72012-11-13 07:53:05 +0000371 return 0;
372
373 p = br_port_get_rtnl(dev);
Vlad Yasevich407af322013-02-13 12:00:12 +0000374 /* We want to accept dev as bridge itself if the AF_SPEC
stephen hemminger8e3bff92013-12-08 12:15:44 -0800375 * is set to see if someone is setting vlan info on the bridge
Vlad Yasevich407af322013-02-13 12:00:12 +0000376 */
Hong zhi guo7b99a992013-03-24 03:26:47 +0000377 if (!p && !afspec)
stephen hemminger25c71c72012-11-13 07:53:05 +0000378 return -EINVAL;
379
Vlad Yasevich407af322013-02-13 12:00:12 +0000380 if (p && protinfo) {
381 if (protinfo->nla_type & NLA_F_NESTED) {
382 err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
383 protinfo, ifla_brport_policy);
384 if (err)
385 return err;
386
387 spin_lock_bh(&p->br->lock);
388 err = br_setport(p, tb);
389 spin_unlock_bh(&p->br->lock);
390 } else {
stephen hemminger8e3bff92013-12-08 12:15:44 -0800391 /* Binary compatibility with old RSTP */
Vlad Yasevich407af322013-02-13 12:00:12 +0000392 if (nla_len(protinfo) < sizeof(u8))
393 return -EINVAL;
394
395 spin_lock_bh(&p->br->lock);
396 err = br_set_port_state(p, nla_get_u8(protinfo));
397 spin_unlock_bh(&p->br->lock);
398 }
stephen hemminger25c71c72012-11-13 07:53:05 +0000399 if (err)
Vlad Yasevich407af322013-02-13 12:00:12 +0000400 goto out;
401 }
stephen hemminger25c71c72012-11-13 07:53:05 +0000402
Vlad Yasevich407af322013-02-13 12:00:12 +0000403 if (afspec) {
404 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
405 afspec, RTM_SETLINK);
stephen hemminger25c71c72012-11-13 07:53:05 +0000406 }
407
408 if (err == 0)
409 br_ifinfo_notify(RTM_NEWLINK, p);
410
Vlad Yasevich407af322013-02-13 12:00:12 +0000411out:
stephen hemminger25c71c72012-11-13 07:53:05 +0000412 return err;
413}
414
Vlad Yasevich407af322013-02-13 12:00:12 +0000415/* Delete port information */
416int br_dellink(struct net_device *dev, struct nlmsghdr *nlh)
417{
Vlad Yasevich407af322013-02-13 12:00:12 +0000418 struct nlattr *afspec;
419 struct net_bridge_port *p;
420 int err;
421
Hong zhi guoc60ee672013-03-28 06:21:22 +0000422 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
Vlad Yasevich407af322013-02-13 12:00:12 +0000423 if (!afspec)
424 return 0;
425
426 p = br_port_get_rtnl(dev);
427 /* We want to accept dev as bridge itself as well */
428 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
429 return -EINVAL;
430
431 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
432 afspec, RTM_DELLINK);
433
434 return err;
435}
stephen hemmingerbb900b22011-04-04 14:03:32 +0000436static int br_validate(struct nlattr *tb[], struct nlattr *data[])
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700437{
stephen hemmingerbb900b22011-04-04 14:03:32 +0000438 if (tb[IFLA_ADDRESS]) {
439 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
440 return -EINVAL;
441 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
442 return -EADDRNOTAVAIL;
443 }
Thomas Graf32fe21c2007-03-22 11:59:03 -0700444
445 return 0;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700446}
447
Toshiaki Makita30313a32014-04-25 17:01:18 +0900448static int br_dev_newlink(struct net *src_net, struct net_device *dev,
449 struct nlattr *tb[], struct nlattr *data[])
450{
451 struct net_bridge *br = netdev_priv(dev);
452
453 if (tb[IFLA_ADDRESS]) {
454 spin_lock_bh(&br->lock);
455 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
456 spin_unlock_bh(&br->lock);
457 }
458
459 return register_netdevice(dev);
460}
461
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000462static size_t br_get_link_af_size(const struct net_device *dev)
463{
464 struct net_port_vlans *pv;
465
466 if (br_port_exists(dev))
Hong Zhiguo1fb17542013-09-14 22:42:27 +0800467 pv = nbp_get_vlan_info(br_port_get_rtnl(dev));
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000468 else if (dev->priv_flags & IFF_EBRIDGE)
469 pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
470 else
471 return 0;
472
473 if (!pv)
474 return 0;
475
476 /* Each VLAN is returned in bridge_vlan_info along with flags */
477 return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
478}
479
Cong Wang15004ca2013-02-13 19:57:12 +0000480static struct rtnl_af_ops br_af_ops = {
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000481 .family = AF_BRIDGE,
482 .get_link_af_size = br_get_link_af_size,
483};
484
stephen hemminger149ddd82012-06-26 05:48:45 +0000485struct rtnl_link_ops br_link_ops __read_mostly = {
stephen hemmingerbb900b22011-04-04 14:03:32 +0000486 .kind = "bridge",
487 .priv_size = sizeof(struct net_bridge),
488 .setup = br_dev_setup,
489 .validate = br_validate,
Toshiaki Makita30313a32014-04-25 17:01:18 +0900490 .newlink = br_dev_newlink,
stephen hemminger1ce5cce2011-10-06 11:19:41 +0000491 .dellink = br_dev_delete,
stephen hemmingerbb900b22011-04-04 14:03:32 +0000492};
493
494int __init br_netlink_init(void)
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700495{
Vlad Yasevich3ec8e9f2013-01-02 09:41:25 +0000496 int err;
497
498 br_mdb_init();
stephen hemminger3678a9d2013-12-30 10:41:32 -0800499 rtnl_af_register(&br_af_ops);
Vlad Yasevich3ec8e9f2013-01-02 09:41:25 +0000500
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000501 err = rtnl_link_register(&br_link_ops);
502 if (err)
503 goto out_af;
504
Vlad Yasevich3ec8e9f2013-01-02 09:41:25 +0000505 return 0;
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000506
507out_af:
508 rtnl_af_unregister(&br_af_ops);
Vlad Yasevich3ec8e9f2013-01-02 09:41:25 +0000509 br_mdb_uninit();
510 return err;
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700511}
512
stephen hemmingerbb900b22011-04-04 14:03:32 +0000513void __exit br_netlink_fini(void)
514{
Vlad Yasevich3ec8e9f2013-01-02 09:41:25 +0000515 br_mdb_uninit();
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000516 rtnl_af_unregister(&br_af_ops);
stephen hemmingerbb900b22011-04-04 14:03:32 +0000517 rtnl_link_unregister(&br_link_ops);
stephen hemmingerbb900b22011-04-04 14:03:32 +0000518}