]> git.ipfire.org Git - thirdparty/linux.git/blame - net/bridge/br_netlink.c
projects / thirdparty / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
bridge: netlink: add group_fwd_mask support
[thirdparty/linux.git] / net / bridge / br_netlink.c
CommitLineData
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
2594e906 24static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
77751ee8 25 u32 filter_mask)
fed0a159 26{
2594e906
NA		 27 struct net_bridge_vlan *v;
28 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
77751ee8 29 u16 flags, pvid;
fed0a159
RP		 30 int num_vlans = 0;
31
fed0a159
RP		 32 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
33 return 0;
34
77751ee8 35 pvid = br_get_pvid(vg);
2594e906 36 /* Count number of vlan infos */
586c2b57 37 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
fed0a159 38 flags = 0;
2594e906
NA		 39 /* only a context, bridge vlan not activated */
40 if (!br_vlan_should_use(v))
41 continue;
42 if (v->vid == pvid)
fed0a159
RP		 43 flags |= BRIDGE_VLAN_INFO_PVID;
44
2594e906 45 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
fed0a159
RP		 46 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
47
48 if (vid_range_start == 0) {
49 goto initvars;
2594e906 50 } else if ((v->vid - vid_range_end) == 1 &&
fed0a159 51 flags == vid_range_flags) {
2594e906 52 vid_range_end = v->vid;
fed0a159
RP		 53 continue;
54 } else {
55 if ((vid_range_end - vid_range_start) > 0)
56 num_vlans += 2;
57 else
58 num_vlans += 1;
59 }
60initvars:
2594e906
NA		 61 vid_range_start = v->vid;
62 vid_range_end = v->vid;
fed0a159
RP		 63 vid_range_flags = flags;
64 }
65
66 if (vid_range_start != 0) {
67 if ((vid_range_end - vid_range_start) > 0)
68 num_vlans += 2;
69 else
70 num_vlans += 1;
71 }
72
73 return num_vlans;
74}
75
2594e906 76static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
77751ee8 77 u32 filter_mask)
2594e906 78{
586c2b57
NA		 79 int num_vlans;
80
2594e906
NA		 81 if (!vg)
82 return 0;
83
84 if (filter_mask & RTEXT_FILTER_BRVLAN)
85 return vg->num_vlans;
86
586c2b57
NA		 87 rcu_read_lock();
88 num_vlans = __get_num_vlan_infos(vg, filter_mask);
89 rcu_read_unlock();
90
91 return num_vlans;
2594e906
NA		 92}
93
fed0a159
RP		 94static size_t br_get_link_af_size_filtered(const struct net_device *dev,
95 u32 filter_mask)
b7853d73 96{
2594e906
NA		 97 struct net_bridge_vlan_group *vg = NULL;
98 struct net_bridge_port *p;
99 struct net_bridge *br;
fed0a159 100 int num_vlan_infos;
b7853d73 101
2f56f6be 102 rcu_read_lock();
2594e906
NA		 103 if (br_port_exists(dev)) {
104 p = br_port_get_rcu(dev);
105 vg = nbp_vlan_group(p);
2594e906
NA		 106 } else if (dev->priv_flags & IFF_EBRIDGE) {
107 br = netdev_priv(dev);
108 vg = br_vlan_group(br);
2594e906 109 }
77751ee8 110 num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
2f56f6be 111 rcu_read_unlock();
b7853d73
RP		 112
113 /* Each VLAN is returned in bridge_vlan_info along with flags */
fed0a159 114 return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
b7853d73
RP		 115}
116
25c71c75 117static inline size_t br_port_info_size(void)
118{
119 return nla_total_size(1) /* IFLA_BRPORT_STATE */
120 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */
121 + nla_total_size(4) /* IFLA_BRPORT_COST */
122 + nla_total_size(1) /* IFLA_BRPORT_MODE */
a2e01a65 123 + nla_total_size(1) /* IFLA_BRPORT_GUARD */
1007dd1a 124 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
3da889b6 125 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
9ba18891 126 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
867a5943 127 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
355b9f9d 128 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
786c2077 129 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
25c71c75 130 + 0;
131}
132
fed0a159 133static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
339bf98f
TG		 134{
135 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
25c71c75 136 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
137 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
138 + nla_total_size(4) /* IFLA_MASTER */
139 + nla_total_size(4) /* IFLA_MTU */
140 + nla_total_size(4) /* IFLA_LINK */
141 + nla_total_size(1) /* IFLA_OPERSTATE */
b7853d73 142 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
fed0a159
RP		 143 + nla_total_size(br_get_link_af_size_filtered(dev,
144 filter_mask)); /* IFLA_AF_SPEC */
25c71c75 145}
146
147static int br_port_fill_attrs(struct sk_buff *skb,
148 const struct net_bridge_port *p)
149{
150 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
151
152 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
153 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
154 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
a2e01a65 155 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
1007dd1a 156 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
c2d3babf 157 nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
9ba18891 158 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
867a5943 159 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
95850116 160 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
842a9ae0
JM		 161 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
162 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
163 !!(p->flags & BR_PROXYARP_WIFI)))
25c71c75 164 return -EMSGSIZE;
165
166 return 0;
339bf98f
TG		 167}
168
36cd0ffb
RP		 169static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
170 u16 vid_end, u16 flags)
171{
172 struct bridge_vlan_info vinfo;
173
174 if ((vid_end - vid_start) > 0) {
175 /* add range to skb */
176 vinfo.vid = vid_start;
177 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
178 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
179 sizeof(vinfo), &vinfo))
180 goto nla_put_failure;
181
36cd0ffb
RP		 182 vinfo.vid = vid_end;
183 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
184 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
185 sizeof(vinfo), &vinfo))
186 goto nla_put_failure;
187 } else {
188 vinfo.vid = vid_start;
189 vinfo.flags = flags;
190 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
191 sizeof(vinfo), &vinfo))
192 goto nla_put_failure;
193 }
194
195 return 0;
196
197nla_put_failure:
198 return -EMSGSIZE;
199}
200
201static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
77751ee8 202 struct net_bridge_vlan_group *vg)
36cd0ffb 203{
2594e906
NA		 204 struct net_bridge_vlan *v;
205 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
77751ee8 206 u16 flags, pvid;
36cd0ffb
RP		 207 int err = 0;
208
209 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
210 * and mark vlan info with begin and end flags
211 * if vlaninfo represents a range
212 */
77751ee8 213 pvid = br_get_pvid(vg);
2594e906 214 list_for_each_entry(v, &vg->vlan_list, vlist) {
36cd0ffb 215 flags = 0;
2594e906
NA		 216 if (!br_vlan_should_use(v))
217 continue;
218 if (v->vid == pvid)
36cd0ffb
RP		 219 flags |= BRIDGE_VLAN_INFO_PVID;
220
2594e906 221 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
36cd0ffb
RP		 222 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
223
224 if (vid_range_start == 0) {
225 goto initvars;
2594e906 226 } else if ((v->vid - vid_range_end) == 1 &&
36cd0ffb 227 flags == vid_range_flags) {
2594e906 228 vid_range_end = v->vid;
36cd0ffb
RP		 229 continue;
230 } else {
231 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
232 vid_range_end,
233 vid_range_flags);
234 if (err)
235 return err;
236 }
237
238initvars:
2594e906
NA		 239 vid_range_start = v->vid;
240 vid_range_end = v->vid;
36cd0ffb
RP		 241 vid_range_flags = flags;
242 }
243
0fe6de49
RP		 244 if (vid_range_start != 0) {
245 /* Call it once more to send any left over vlans */
246 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
247 vid_range_end,
248 vid_range_flags);
249 if (err)
250 return err;
251 }
36cd0ffb
RP		 252
253 return 0;
254}
255
256static int br_fill_ifvlaninfo(struct sk_buff *skb,
77751ee8 257 struct net_bridge_vlan_group *vg)
36cd0ffb
RP		 258{
259 struct bridge_vlan_info vinfo;
2594e906 260 struct net_bridge_vlan *v;
77751ee8 261 u16 pvid;
36cd0ffb 262
77751ee8 263 pvid = br_get_pvid(vg);
2594e906
NA		 264 list_for_each_entry(v, &vg->vlan_list, vlist) {
265 if (!br_vlan_should_use(v))
266 continue;
267
268 vinfo.vid = v->vid;
36cd0ffb 269 vinfo.flags = 0;
2594e906 270 if (v->vid == pvid)
36cd0ffb
RP		 271 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
272
2594e906 273 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
36cd0ffb
RP		 274 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
275
276 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
277 sizeof(vinfo), &vinfo))
278 goto nla_put_failure;
279 }
280
281 return 0;
282
283nla_put_failure:
284 return -EMSGSIZE;
285}
286
11dc1f36
SH		 287/*
288 * Create one netlink message for one interface
289 * Contains port and master info as well as carrier and bridge state.
290 */
6cbdceeb 291static int br_fill_ifinfo(struct sk_buff *skb,
2594e906 292 struct net_bridge_port *port,
6cbdceeb
VY		 293 u32 pid, u32 seq, int event, unsigned int flags,
294 u32 filter_mask, const struct net_device *dev)
11dc1f36 295{
2594e906 296 struct net_bridge *br;
74685962 297 struct ifinfomsg *hdr;
11dc1f36 298 struct nlmsghdr *nlh;
11dc1f36 299 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
11dc1f36 300
6cbdceeb
VY		 301 if (port)
302 br = port->br;
303 else
304 br = netdev_priv(dev);
305
28a16c97 306 br_debug(br, "br_fill_info event %d port %s master %s\n",
307 event, dev->name, br->dev->name);
11dc1f36 308
74685962
TG		 309 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
310 if (nlh == NULL)
26932566 311 return -EMSGSIZE;
11dc1f36 312
74685962
TG		 313 hdr = nlmsg_data(nlh);
314 hdr->ifi_family = AF_BRIDGE;
315 hdr->__ifi_pad = 0;
316 hdr->ifi_type = dev->type;
317 hdr->ifi_index = dev->ifindex;
318 hdr->ifi_flags = dev_get_flags(dev);
319 hdr->ifi_change = 0;
11dc1f36 320
2eb812e6
DM		 321 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
322 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
323 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
324 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
325 (dev->addr_len &&
326 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 327 (dev->ifindex != dev_get_iflink(dev) &&
328 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
2eb812e6 329 goto nla_put_failure;
25c71c75 330
6cbdceeb 331 if (event == RTM_NEWLINK && port) {
25c71c75 332 struct nlattr *nest
333 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
334
335 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
336 goto nla_put_failure;
337 nla_nest_end(skb, nest);
338 }
339
6cbdceeb 340 /* Check if the VID information is requested */
36cd0ffb
RP		 341 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
342 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
2594e906 343 struct net_bridge_vlan_group *vg;
36cd0ffb
RP		 344 struct nlattr *af;
345 int err;
6cbdceeb 346
77751ee8 347 if (port)
2594e906 348 vg = nbp_vlan_group(port);
77751ee8 349 else
2594e906 350 vg = br_vlan_group(br);
6cbdceeb 351
2594e906 352 if (!vg || !vg->num_vlans)
6cbdceeb
VY		 353 goto done;
354
355 af = nla_nest_start(skb, IFLA_AF_SPEC);
356 if (!af)
357 goto nla_put_failure;
358
36cd0ffb 359 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
77751ee8 360 err = br_fill_ifvlaninfo_compressed(skb, vg);
36cd0ffb 361 else
77751ee8 362 err = br_fill_ifvlaninfo(skb, vg);
36cd0ffb
RP		 363 if (err)
364 goto nla_put_failure;
6cbdceeb
VY		 365 nla_nest_end(skb, af);
366 }
367
368done:
053c095a
JB		 369 nlmsg_end(skb, nlh);
370 return 0;
11dc1f36 371
74685962 372nla_put_failure:
26932566
PM		 373 nlmsg_cancel(skb, nlh);
374 return -EMSGSIZE;
11dc1f36
SH		 375}
376
377/*
378 * Notify listeners of a change in port information
379 */
380void br_ifinfo_notify(int event, struct net_bridge_port *port)
381{
407af329 382 struct net *net;
11dc1f36 383 struct sk_buff *skb;
280a306c 384 int err = -ENOBUFS;
fed0a159 385 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
11dc1f36 386
407af329
VY		 387 if (!port)
388 return;
389
390 net = dev_net(port->dev);
28a16c97 391 br_debug(port->br, "port %u(%s) event %d\n",
95c96174 392 (unsigned int)port->port_no, port->dev->name, event);
28a16c97 393
fed0a159 394 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
280a306c
TG		 395 if (skb == NULL)
396 goto errout;
397
fed0a159 398 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
26932566
PM		 399 if (err < 0) {
400 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
401 WARN_ON(err == -EMSGSIZE);
402 kfree_skb(skb);
403 goto errout;
404 }
1ce85fe4
PNA		 405 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
406 return;
280a306c 407errout:
87e823b3 408 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
11dc1f36
SH		 409}
410
407af329 411
11dc1f36
SH		 412/*
413 * Dump information about all ports, in response to GETLINK
414 */
e5a55a89 415int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
46c264da 416 struct net_device *dev, u32 filter_mask, int nlflags)
11dc1f36 417{
1fb1754a 418 struct net_bridge_port *port = br_port_get_rtnl(dev);
e5a55a89 419
36cd0ffb
RP		 420 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
421 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
1b846f92 422 return 0;
11dc1f36 423
46c264da 424 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
1b846f92 425 filter_mask, dev);
11dc1f36
SH		 426}
427
bdced7ef
RP		 428static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
429 int cmd, struct bridge_vlan_info *vinfo)
430{
431 int err = 0;
432
433 switch (cmd) {
434 case RTM_SETLINK:
435 if (p) {
2594e906
NA		 436 /* if the MASTER flag is set this will act on the global
437 * per-VLAN entry as well
438 */
bdced7ef
RP		 439 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
440 if (err)
441 break;
bdced7ef 442 } else {
2594e906 443 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
bdced7ef
RP		 444 err = br_vlan_add(br, vinfo->vid, vinfo->flags);
445 }
446 break;
447
448 case RTM_DELLINK:
449 if (p) {
450 nbp_vlan_delete(p, vinfo->vid);
451 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
452 br_vlan_delete(p->br, vinfo->vid);
453 } else {
454 br_vlan_delete(br, vinfo->vid);
455 }
456 break;
457 }
458
459 return err;
460}
407af329
VY		 461
462static int br_afspec(struct net_bridge *br,
463 struct net_bridge_port *p,
464 struct nlattr *af_spec,
465 int cmd)
466{
bdced7ef
RP		 467 struct bridge_vlan_info *vinfo_start = NULL;
468 struct bridge_vlan_info *vinfo = NULL;
469 struct nlattr *attr;
407af329 470 int err = 0;
bdced7ef 471 int rem;
407af329 472
bdced7ef
RP		 473 nla_for_each_nested(attr, af_spec, rem) {
474 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
475 continue;
476 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
477 return -EINVAL;
478 vinfo = nla_data(attr);
462e1ead
NA		 479 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
480 return -EINVAL;
bdced7ef
RP		 481 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
482 if (vinfo_start)
483 return -EINVAL;
484 vinfo_start = vinfo;
485 continue;
486 }
407af329 487
bdced7ef
RP		 488 if (vinfo_start) {
489 struct bridge_vlan_info tmp_vinfo;
490 int v;
407af329 491
bdced7ef
RP		 492 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
493 return -EINVAL;
407af329 494
bdced7ef
RP		 495 if (vinfo->vid <= vinfo_start->vid)
496 return -EINVAL;
497
498 memcpy(&tmp_vinfo, vinfo_start,
499 sizeof(struct bridge_vlan_info));
407af329 500
bdced7ef
RP		 501 for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
502 tmp_vinfo.vid = v;
503 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
407af329
VY		 504 if (err)
505 break;
bdced7ef
RP		 506 }
507 vinfo_start = NULL;
508 } else {
509 err = br_vlan_info(br, p, cmd, vinfo);
407af329 510 }
bdced7ef
RP		 511 if (err)
512 break;
407af329
VY		 513 }
514
515 return err;
516}
517
3ac636b8 518static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
25c71c75 519 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
520 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
521 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
522 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
a2e01a65 523 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
1007dd1a 524 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
6f705d8c 525 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
9ba18891 526 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
867a5943 527 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
355b9f9d 528 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
786c2077 529 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
25c71c75 530};
531
532/* Change the state of the port and notify spanning tree */
533static int br_set_port_state(struct net_bridge_port *p, u8 state)
534{
535 if (state > BR_STATE_BLOCKING)
536 return -EINVAL;
537
538 /* if kernel STP is running, don't allow changes */
539 if (p->br->stp_enabled == BR_KERNEL_STP)
540 return -EBUSY;
541
576eb625 542 /* if device is not up, change is not allowed
543 * if link is not present, only allowable state is disabled
544 */
25c71c75 545 if (!netif_running(p->dev) ||
576eb625 546 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
25c71c75 547 return -ENETDOWN;
548
775dd692 549 br_set_state(p, state);
25c71c75 550 br_log_state(p);
551 br_port_state_selection(p->br);
552 return 0;
553}
554
555/* Set/clear or port flags based on attribute */
556static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
557 int attrtype, unsigned long mask)
558{
559 if (tb[attrtype]) {
560 u8 flag = nla_get_u8(tb[attrtype]);
561 if (flag)
562 p->flags |= mask;
563 else
564 p->flags &= ~mask;
565 }
566}
567
568/* Process bridge protocol info on port */
569static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
570{
571 int err;
e028e4b8 572 unsigned long old_flags = p->flags;
25c71c75 573
574 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
a2e01a65 575 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
c2d3babf 576 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
3d84fa98 577 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
9ba18891 578 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
867a5943 579 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
95850116 580 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
842a9ae0 581 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
25c71c75 582
583 if (tb[IFLA_BRPORT_COST]) {
584 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
585 if (err)
586 return err;
587 }
588
589 if (tb[IFLA_BRPORT_PRIORITY]) {
590 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
591 if (err)
592 return err;
593 }
594
595 if (tb[IFLA_BRPORT_STATE]) {
596 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
597 if (err)
598 return err;
599 }
e028e4b8
VY		 600
601 br_port_flags_change(p, old_flags ^ p->flags);
25c71c75 602 return 0;
603}
604
605/* Change state and parameters on port. */
add511b3 606int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
11dc1f36 607{
74685962 608 struct nlattr *protinfo;
407af329 609 struct nlattr *afspec;
11dc1f36 610 struct net_bridge_port *p;
2062cc20 611 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
41c498b9 612 int err = 0;
11dc1f36 613
c60ee67f
H		 614 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
615 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
407af329 616 if (!protinfo && !afspec)
25c71c75 617 return 0;
11dc1f36 618
ec1e5610 619 p = br_port_get_rtnl(dev);
407af329 620 /* We want to accept dev as bridge itself if the AF_SPEC
8e3bff96 621 * is set to see if someone is setting vlan info on the bridge
407af329 622 */
7b99a993 623 if (!p && !afspec)
b5ed54e9 624 return -EINVAL;
11dc1f36 625
407af329
VY		 626 if (p && protinfo) {
627 if (protinfo->nla_type & NLA_F_NESTED) {
628 err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
3ac636b8 629 protinfo, br_port_policy);
407af329
VY		 630 if (err)
631 return err;
632
633 spin_lock_bh(&p->br->lock);
634 err = br_setport(p, tb);
635 spin_unlock_bh(&p->br->lock);
636 } else {
8e3bff96 637 /* Binary compatibility with old RSTP */
407af329
VY		 638 if (nla_len(protinfo) < sizeof(u8))
639 return -EINVAL;
640
641 spin_lock_bh(&p->br->lock);
642 err = br_set_port_state(p, nla_get_u8(protinfo));
643 spin_unlock_bh(&p->br->lock);
644 }
25c71c75 645 if (err)
407af329
VY		 646 goto out;
647 }
11dc1f36 648
407af329
VY		 649 if (afspec) {
650 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
651 afspec, RTM_SETLINK);
25c71c75 652 }
b03b6dd5 653
25c71c75 654 if (err == 0)
655 br_ifinfo_notify(RTM_NEWLINK, p);
407af329 656out:
25c71c75 657 return err;
11dc1f36
SH		 658}
659
407af329 660/* Delete port information */
add511b3 661int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
407af329 662{
407af329
VY		 663 struct nlattr *afspec;
664 struct net_bridge_port *p;
8508025c 665 int err = 0;
407af329 666
c60ee67f 667 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
407af329
VY		 668 if (!afspec)
669 return 0;
670
671 p = br_port_get_rtnl(dev);
672 /* We want to accept dev as bridge itself as well */
673 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
674 return -EINVAL;
675
676 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
677 afspec, RTM_DELLINK);
02dba438
RP		 678 if (err == 0)
679 /* Send RTM_NEWLINK because userspace
680 * expects RTM_NEWLINK for vlan dels
681 */
682 br_ifinfo_notify(RTM_NEWLINK, p);
407af329
VY		 683
684 return err;
685}
bb900b27 686static int br_validate(struct nlattr *tb[], struct nlattr *data[])
687{
688 if (tb[IFLA_ADDRESS]) {
689 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
690 return -EINVAL;
691 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
692 return -EADDRNOTAVAIL;
693 }
694
d2d427b3
TM		 695 if (!data)
696 return 0;
697
698#ifdef CONFIG_BRIDGE_VLAN_FILTERING
699 if (data[IFLA_BR_VLAN_PROTOCOL]) {
700 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
701 case htons(ETH_P_8021Q):
702 case htons(ETH_P_8021AD):
703 break;
704 default:
705 return -EPROTONOSUPPORT;
706 }
707 }
708#endif
709
bb900b27 710 return 0;
711}
712
30313a3d
TM		 713static int br_dev_newlink(struct net *src_net, struct net_device *dev,
714 struct nlattr *tb[], struct nlattr *data[])
715{
716 struct net_bridge *br = netdev_priv(dev);
717
718 if (tb[IFLA_ADDRESS]) {
719 spin_lock_bh(&br->lock);
720 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
721 spin_unlock_bh(&br->lock);
722 }
723
724 return register_netdevice(dev);
725}
726
3ac636b8
JP		 727static int br_port_slave_changelink(struct net_device *brdev,
728 struct net_device *dev,
729 struct nlattr *tb[],
730 struct nlattr *data[])
731{
963ad948
NA		 732 struct net_bridge *br = netdev_priv(brdev);
733 int ret;
734
3ac636b8
JP		 735 if (!data)
736 return 0;
963ad948
NA		 737
738 spin_lock_bh(&br->lock);
739 ret = br_setport(br_port_get_rtnl(dev), data);
740 spin_unlock_bh(&br->lock);
741
742 return ret;
3ac636b8
JP		 743}
744
ced8283f
JP		 745static int br_port_fill_slave_info(struct sk_buff *skb,
746 const struct net_device *brdev,
747 const struct net_device *dev)
748{
749 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
750}
751
752static size_t br_port_get_slave_size(const struct net_device *brdev,
753 const struct net_device *dev)
754{
755 return br_port_info_size();
756}
757
13323516
JP		 758static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
759 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
760 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
761 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
af615762
JT		 762 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
763 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
764 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
a7854037 765 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
d2d427b3 766 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
7910228b 767 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
13323516
JP		 768};
769
770static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
771 struct nlattr *data[])
772{
773 struct net_bridge *br = netdev_priv(brdev);
774 int err;
775
776 if (!data)
777 return 0;
778
779 if (data[IFLA_BR_FORWARD_DELAY]) {
780 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
781 if (err)
782 return err;
783 }
784
785 if (data[IFLA_BR_HELLO_TIME]) {
786 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
787 if (err)
788 return err;
789 }
790
791 if (data[IFLA_BR_MAX_AGE]) {
792 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
793 if (err)
794 return err;
795 }
796
af615762
JT		 797 if (data[IFLA_BR_AGEING_TIME]) {
798 u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]);
799
800 br->ageing_time = clock_t_to_jiffies(ageing_time);
801 }
802
803 if (data[IFLA_BR_STP_STATE]) {
804 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
805
806 br_stp_set_enabled(br, stp_enabled);
807 }
808
809 if (data[IFLA_BR_PRIORITY]) {
810 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
811
812 br_stp_set_bridge_priority(br, priority);
813 }
814
a7854037
NA		 815 if (data[IFLA_BR_VLAN_FILTERING]) {
816 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
817
818 err = __br_vlan_filter_toggle(br, vlan_filter);
819 if (err)
820 return err;
821 }
822
d2d427b3
TM		 823#ifdef CONFIG_BRIDGE_VLAN_FILTERING
824 if (data[IFLA_BR_VLAN_PROTOCOL]) {
825 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
826
827 err = __br_vlan_set_proto(br, vlan_proto);
828 if (err)
829 return err;
830 }
831#endif
832
7910228b
NA		 833 if (data[IFLA_BR_GROUP_FWD_MASK]) {
834 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
835
836 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
837 return -EINVAL;
838 br->group_fwd_mask = fwd_mask;
839 }
840
13323516
JP		 841 return 0;
842}
843
e5c3ea5c
JP		 844static size_t br_get_size(const struct net_device *brdev)
845{
846 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
847 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
848 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
af615762
JT		 849 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
850 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
851 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
a7854037 852 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
d2d427b3
TM		 853#ifdef CONFIG_BRIDGE_VLAN_FILTERING
854 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
855#endif
7910228b 856 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
e5c3ea5c
JP		 857 0;
858}
859
860static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
861{
862 struct net_bridge *br = netdev_priv(brdev);
863 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
864 u32 hello_time = jiffies_to_clock_t(br->hello_time);
865 u32 age_time = jiffies_to_clock_t(br->max_age);
af615762
JT		 866 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
867 u32 stp_enabled = br->stp_enabled;
868 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
7910228b 869 u16 group_fwd_mask = br->group_fwd_mask;
a7854037 870 u8 vlan_enabled = br_vlan_enabled(br);
e5c3ea5c
JP		 871
872 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
873 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
af615762
JT		 874 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
875 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
876 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
a7854037 877 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
7910228b
NA		 878 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
879 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, group_fwd_mask))
e5c3ea5c
JP		 880 return -EMSGSIZE;
881
d2d427b3
TM		 882#ifdef CONFIG_BRIDGE_VLAN_FILTERING
883 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto))
884 return -EMSGSIZE;
885#endif
886
e5c3ea5c
JP		 887 return 0;
888}
889
fed0a159
RP		 890static size_t br_get_link_af_size(const struct net_device *dev)
891{
2594e906
NA		 892 struct net_bridge_port *p;
893 struct net_bridge *br;
894 int num_vlans = 0;
fed0a159 895
2594e906
NA		 896 if (br_port_exists(dev)) {
897 p = br_port_get_rtnl(dev);
898 num_vlans = br_get_num_vlan_infos(nbp_vlan_group(p),
77751ee8 899 RTEXT_FILTER_BRVLAN);
2594e906
NA		 900 } else if (dev->priv_flags & IFF_EBRIDGE) {
901 br = netdev_priv(dev);
902 num_vlans = br_get_num_vlan_infos(br_vlan_group(br),
77751ee8 903 RTEXT_FILTER_BRVLAN);
2594e906 904 }
fed0a159
RP		 905
906 /* Each VLAN is returned in bridge_vlan_info along with flags */
2594e906 907 return num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
fed0a159
RP		 908}
909
207895fd 910static struct rtnl_af_ops br_af_ops __read_mostly = {
6cbdceeb
VY		 911 .family = AF_BRIDGE,
912 .get_link_af_size = br_get_link_af_size,
913};
914
149ddd83 915struct rtnl_link_ops br_link_ops __read_mostly = {
ced8283f
JP		 916 .kind = "bridge",
917 .priv_size = sizeof(struct net_bridge),
918 .setup = br_dev_setup,
eb4cb851 919 .maxtype = IFLA_BR_MAX,
13323516 920 .policy = br_policy,
ced8283f
JP		 921 .validate = br_validate,
922 .newlink = br_dev_newlink,
13323516 923 .changelink = br_changelink,
ced8283f 924 .dellink = br_dev_delete,
e5c3ea5c
JP		 925 .get_size = br_get_size,
926 .fill_info = br_fill_info,
3ac636b8
JP		 927
928 .slave_maxtype = IFLA_BRPORT_MAX,
929 .slave_policy = br_port_policy,
930 .slave_changelink = br_port_slave_changelink,
ced8283f
JP		 931 .get_slave_size = br_port_get_slave_size,
932 .fill_slave_info = br_port_fill_slave_info,
bb900b27 933};
11dc1f36 934
32fe21c0 935int __init br_netlink_init(void)
11dc1f36 936{
3ec8e9f0
VY		 937 int err;
938
939 br_mdb_init();
3678a9d8 940 rtnl_af_register(&br_af_ops);
3ec8e9f0 941
6cbdceeb
VY		 942 err = rtnl_link_register(&br_link_ops);
943 if (err)
944 goto out_af;
945
3ec8e9f0 946 return 0;
6cbdceeb
VY		 947
948out_af:
949 rtnl_af_unregister(&br_af_ops);
3ec8e9f0
VY		 950 br_mdb_uninit();
951 return err;
11dc1f36
SH		 952}
953
34666d46 954void br_netlink_fini(void)
11dc1f36 955{
3ec8e9f0 956 br_mdb_uninit();
6cbdceeb 957 rtnl_af_unregister(&br_af_ops);
bb900b27 958 rtnl_link_unregister(&br_link_ops);
11dc1f36 959}
A mirror of Linus' kernel repository