projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branches 'acpi-resources', 'acpi-battery', 'acpi-doc' and 'acpi-pnp'
[linux-2.6-block.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>
68e331c7 19#include <net/switchdev.h>
407af329 20#include <uapi/linux/if_bridge.h>
bb900b27 21
11dc1f36 22#include "br_private.h"
b03b6dd5 23#include "br_private_stp.h"
11dc1f36 24
fed0a159
RP		 25static int br_get_num_vlan_infos(const struct net_port_vlans *pv,
26 u32 filter_mask)
27{
28 u16 vid_range_start = 0, vid_range_end = 0;
29 u16 vid_range_flags = 0;
30 u16 pvid, vid, flags;
31 int num_vlans = 0;
32
33 if (filter_mask & RTEXT_FILTER_BRVLAN)
34 return pv->num_vlans;
35
36 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
37 return 0;
38
39 /* Count number of vlan info's
40 */
41 pvid = br_get_pvid(pv);
42 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
43 flags = 0;
44 if (vid == pvid)
45 flags |= BRIDGE_VLAN_INFO_PVID;
46
47 if (test_bit(vid, pv->untagged_bitmap))
48 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
49
50 if (vid_range_start == 0) {
51 goto initvars;
52 } else if ((vid - vid_range_end) == 1 &&
53 flags == vid_range_flags) {
54 vid_range_end = vid;
55 continue;
56 } else {
57 if ((vid_range_end - vid_range_start) > 0)
58 num_vlans += 2;
59 else
60 num_vlans += 1;
61 }
62initvars:
63 vid_range_start = vid;
64 vid_range_end = vid;
65 vid_range_flags = flags;
66 }
67
68 if (vid_range_start != 0) {
69 if ((vid_range_end - vid_range_start) > 0)
70 num_vlans += 2;
71 else
72 num_vlans += 1;
73 }
74
75 return num_vlans;
76}
77
78static size_t br_get_link_af_size_filtered(const struct net_device *dev,
79 u32 filter_mask)
b7853d73
RP		 80{
81 struct net_port_vlans *pv;
fed0a159 82 int num_vlan_infos;
b7853d73 83
2f56f6be 84 rcu_read_lock();
b7853d73 85 if (br_port_exists(dev))
2f56f6be 86 pv = nbp_get_vlan_info(br_port_get_rcu(dev));
b7853d73
RP		 87 else if (dev->priv_flags & IFF_EBRIDGE)
88 pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
89 else
2f56f6be
JB		 90 pv = NULL;
91 if (pv)
92 num_vlan_infos = br_get_num_vlan_infos(pv, filter_mask);
93 else
94 num_vlan_infos = 0;
95 rcu_read_unlock();
b7853d73 96
fed0a159
RP		 97 if (!num_vlan_infos)
98 return 0;
99
b7853d73 100 /* Each VLAN is returned in bridge_vlan_info along with flags */
fed0a159 101 return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
b7853d73
RP		 102}
103
25c71c75 104static inline size_t br_port_info_size(void)
105{
106 return nla_total_size(1) /* IFLA_BRPORT_STATE */
107 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */
108 + nla_total_size(4) /* IFLA_BRPORT_COST */
109 + nla_total_size(1) /* IFLA_BRPORT_MODE */
a2e01a65 110 + nla_total_size(1) /* IFLA_BRPORT_GUARD */
1007dd1a 111 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
3da889b6 112 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
9ba18891 113 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
867a5943 114 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
25c71c75 115 + 0;
116}
117
fed0a159 118static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
339bf98f
TG		 119{
120 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
25c71c75 121 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
122 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
123 + nla_total_size(4) /* IFLA_MASTER */
124 + nla_total_size(4) /* IFLA_MTU */
125 + nla_total_size(4) /* IFLA_LINK */
126 + nla_total_size(1) /* IFLA_OPERSTATE */
b7853d73 127 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
fed0a159
RP		 128 + nla_total_size(br_get_link_af_size_filtered(dev,
129 filter_mask)); /* IFLA_AF_SPEC */
25c71c75 130}
131
132static int br_port_fill_attrs(struct sk_buff *skb,
133 const struct net_bridge_port *p)
134{
135 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
136
137 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
138 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
139 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
a2e01a65 140 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
1007dd1a 141 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
c2d3babf 142 nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
9ba18891 143 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
867a5943 144 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
95850116 145 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
842a9ae0
JM		 146 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
147 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
148 !!(p->flags & BR_PROXYARP_WIFI)))
25c71c75 149 return -EMSGSIZE;
150
151 return 0;
339bf98f
TG		 152}
153
36cd0ffb
RP		 154static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
155 u16 vid_end, u16 flags)
156{
157 struct bridge_vlan_info vinfo;
158
159 if ((vid_end - vid_start) > 0) {
160 /* add range to skb */
161 vinfo.vid = vid_start;
162 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
163 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
164 sizeof(vinfo), &vinfo))
165 goto nla_put_failure;
166
167 vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
168
169 vinfo.vid = vid_end;
170 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
171 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
172 sizeof(vinfo), &vinfo))
173 goto nla_put_failure;
174 } else {
175 vinfo.vid = vid_start;
176 vinfo.flags = flags;
177 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
178 sizeof(vinfo), &vinfo))
179 goto nla_put_failure;
180 }
181
182 return 0;
183
184nla_put_failure:
185 return -EMSGSIZE;
186}
187
188static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
189 const struct net_port_vlans *pv)
190{
191 u16 vid_range_start = 0, vid_range_end = 0;
0fe6de49 192 u16 vid_range_flags = 0;
36cd0ffb
RP		 193 u16 pvid, vid, flags;
194 int err = 0;
195
196 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
197 * and mark vlan info with begin and end flags
198 * if vlaninfo represents a range
199 */
200 pvid = br_get_pvid(pv);
201 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
202 flags = 0;
203 if (vid == pvid)
204 flags |= BRIDGE_VLAN_INFO_PVID;
205
206 if (test_bit(vid, pv->untagged_bitmap))
207 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
208
209 if (vid_range_start == 0) {
210 goto initvars;
211 } else if ((vid - vid_range_end) == 1 &&
212 flags == vid_range_flags) {
213 vid_range_end = vid;
214 continue;
215 } else {
216 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
217 vid_range_end,
218 vid_range_flags);
219 if (err)
220 return err;
221 }
222
223initvars:
224 vid_range_start = vid;
225 vid_range_end = vid;
226 vid_range_flags = flags;
227 }
228
0fe6de49
RP		 229 if (vid_range_start != 0) {
230 /* Call it once more to send any left over vlans */
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 }
36cd0ffb
RP		 237
238 return 0;
239}
240
241static int br_fill_ifvlaninfo(struct sk_buff *skb,
242 const struct net_port_vlans *pv)
243{
244 struct bridge_vlan_info vinfo;
245 u16 pvid, vid;
246
247 pvid = br_get_pvid(pv);
248 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
249 vinfo.vid = vid;
250 vinfo.flags = 0;
251 if (vid == pvid)
252 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
253
254 if (test_bit(vid, pv->untagged_bitmap))
255 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
256
257 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
258 sizeof(vinfo), &vinfo))
259 goto nla_put_failure;
260 }
261
262 return 0;
263
264nla_put_failure:
265 return -EMSGSIZE;
266}
267
11dc1f36
SH		 268/*
269 * Create one netlink message for one interface
270 * Contains port and master info as well as carrier and bridge state.
271 */
6cbdceeb
VY		 272static int br_fill_ifinfo(struct sk_buff *skb,
273 const struct net_bridge_port *port,
274 u32 pid, u32 seq, int event, unsigned int flags,
275 u32 filter_mask, const struct net_device *dev)
11dc1f36 276{
6cbdceeb 277 const struct net_bridge *br;
74685962 278 struct ifinfomsg *hdr;
11dc1f36 279 struct nlmsghdr *nlh;
11dc1f36 280 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
11dc1f36 281
6cbdceeb
VY		 282 if (port)
283 br = port->br;
284 else
285 br = netdev_priv(dev);
286
28a16c97 287 br_debug(br, "br_fill_info event %d port %s master %s\n",
288 event, dev->name, br->dev->name);
11dc1f36 289
74685962
TG		 290 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
291 if (nlh == NULL)
26932566 292 return -EMSGSIZE;
11dc1f36 293
74685962
TG		 294 hdr = nlmsg_data(nlh);
295 hdr->ifi_family = AF_BRIDGE;
296 hdr->__ifi_pad = 0;
297 hdr->ifi_type = dev->type;
298 hdr->ifi_index = dev->ifindex;
299 hdr->ifi_flags = dev_get_flags(dev);
300 hdr->ifi_change = 0;
11dc1f36 301
2eb812e6
DM		 302 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
303 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
304 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
305 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
306 (dev->addr_len &&
307 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 308 (dev->ifindex != dev_get_iflink(dev) &&
309 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
2eb812e6 310 goto nla_put_failure;
25c71c75 311
6cbdceeb 312 if (event == RTM_NEWLINK && port) {
25c71c75 313 struct nlattr *nest
314 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
315
316 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
317 goto nla_put_failure;
318 nla_nest_end(skb, nest);
319 }
320
6cbdceeb 321 /* Check if the VID information is requested */
36cd0ffb
RP		 322 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
323 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
6cbdceeb 324 const struct net_port_vlans *pv;
36cd0ffb
RP		 325 struct nlattr *af;
326 int err;
6cbdceeb
VY		 327
328 if (port)
329 pv = nbp_get_vlan_info(port);
330 else
331 pv = br_get_vlan_info(br);
332
ef40b7ef 333 if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID))
6cbdceeb
VY		 334 goto done;
335
336 af = nla_nest_start(skb, IFLA_AF_SPEC);
337 if (!af)
338 goto nla_put_failure;
339
36cd0ffb
RP		 340 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
341 err = br_fill_ifvlaninfo_compressed(skb, pv);
342 else
343 err = br_fill_ifvlaninfo(skb, pv);
344 if (err)
345 goto nla_put_failure;
6cbdceeb
VY		 346 nla_nest_end(skb, af);
347 }
348
349done:
053c095a
JB		 350 nlmsg_end(skb, nlh);
351 return 0;
11dc1f36 352
74685962 353nla_put_failure:
26932566
PM		 354 nlmsg_cancel(skb, nlh);
355 return -EMSGSIZE;
11dc1f36
SH		 356}
357
358/*
359 * Notify listeners of a change in port information
360 */
361void br_ifinfo_notify(int event, struct net_bridge_port *port)
362{
407af329 363 struct net *net;
11dc1f36 364 struct sk_buff *skb;
280a306c 365 int err = -ENOBUFS;
fed0a159 366 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
11dc1f36 367
407af329
VY		 368 if (!port)
369 return;
370
371 net = dev_net(port->dev);
28a16c97 372 br_debug(port->br, "port %u(%s) event %d\n",
95c96174 373 (unsigned int)port->port_no, port->dev->name, event);
28a16c97 374
fed0a159 375 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
280a306c
TG		 376 if (skb == NULL)
377 goto errout;
378
fed0a159 379 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
26932566
PM		 380 if (err < 0) {
381 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
382 WARN_ON(err == -EMSGSIZE);
383 kfree_skb(skb);
384 goto errout;
385 }
1ce85fe4
PNA		 386 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
387 return;
280a306c 388errout:
87e823b3 389 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
11dc1f36
SH		 390}
391
407af329 392
11dc1f36
SH		 393/*
394 * Dump information about all ports, in response to GETLINK
395 */
e5a55a89 396int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
46c264da 397 struct net_device *dev, u32 filter_mask, int nlflags)
11dc1f36 398{
1fb1754a 399 struct net_bridge_port *port = br_port_get_rtnl(dev);
e5a55a89 400
36cd0ffb
RP		 401 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
402 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
1b846f92 403 return 0;
11dc1f36 404
46c264da 405 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
1b846f92 406 filter_mask, dev);
11dc1f36
SH		 407}
408
bdced7ef
RP		 409static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
410 int cmd, struct bridge_vlan_info *vinfo)
411{
412 int err = 0;
413
414 switch (cmd) {
415 case RTM_SETLINK:
416 if (p) {
417 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
418 if (err)
419 break;
420
421 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
422 err = br_vlan_add(p->br, vinfo->vid,
423 vinfo->flags);
424 } else {
425 err = br_vlan_add(br, vinfo->vid, vinfo->flags);
426 }
427 break;
428
429 case RTM_DELLINK:
430 if (p) {
431 nbp_vlan_delete(p, vinfo->vid);
432 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
433 br_vlan_delete(p->br, vinfo->vid);
434 } else {
435 br_vlan_delete(br, vinfo->vid);
436 }
437 break;
438 }
439
440 return err;
441}
407af329
VY		 442
443static int br_afspec(struct net_bridge *br,
444 struct net_bridge_port *p,
445 struct nlattr *af_spec,
446 int cmd)
447{
bdced7ef
RP		 448 struct bridge_vlan_info *vinfo_start = NULL;
449 struct bridge_vlan_info *vinfo = NULL;
450 struct nlattr *attr;
407af329 451 int err = 0;
bdced7ef 452 int rem;
407af329 453
bdced7ef
RP		 454 nla_for_each_nested(attr, af_spec, rem) {
455 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
456 continue;
457 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
458 return -EINVAL;
459 vinfo = nla_data(attr);
460 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
461 if (vinfo_start)
462 return -EINVAL;
463 vinfo_start = vinfo;
464 continue;
465 }
407af329 466
bdced7ef
RP		 467 if (vinfo_start) {
468 struct bridge_vlan_info tmp_vinfo;
469 int v;
407af329 470
bdced7ef
RP		 471 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
472 return -EINVAL;
407af329 473
bdced7ef
RP		 474 if (vinfo->vid <= vinfo_start->vid)
475 return -EINVAL;
476
477 memcpy(&tmp_vinfo, vinfo_start,
478 sizeof(struct bridge_vlan_info));
407af329 479
bdced7ef
RP		 480 for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
481 tmp_vinfo.vid = v;
482 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
407af329
VY		 483 if (err)
484 break;
bdced7ef
RP		 485 }
486 vinfo_start = NULL;
487 } else {
488 err = br_vlan_info(br, p, cmd, vinfo);
407af329 489 }
bdced7ef
RP		 490 if (err)
491 break;
407af329
VY		 492 }
493
494 return err;
495}
496
3ac636b8 497static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
25c71c75 498 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
499 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
500 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
501 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
a2e01a65 502 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
1007dd1a 503 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
6f705d8c 504 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
9ba18891 505 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
867a5943 506 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
25c71c75 507};
508
509/* Change the state of the port and notify spanning tree */
510static int br_set_port_state(struct net_bridge_port *p, u8 state)
511{
512 if (state > BR_STATE_BLOCKING)
513 return -EINVAL;
514
515 /* if kernel STP is running, don't allow changes */
516 if (p->br->stp_enabled == BR_KERNEL_STP)
517 return -EBUSY;
518
576eb625 519 /* if device is not up, change is not allowed
520 * if link is not present, only allowable state is disabled
521 */
25c71c75 522 if (!netif_running(p->dev) ||
576eb625 523 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
25c71c75 524 return -ENETDOWN;
525
775dd692 526 br_set_state(p, state);
25c71c75 527 br_log_state(p);
528 br_port_state_selection(p->br);
529 return 0;
530}
531
532/* Set/clear or port flags based on attribute */
533static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
534 int attrtype, unsigned long mask)
535{
536 if (tb[attrtype]) {
537 u8 flag = nla_get_u8(tb[attrtype]);
538 if (flag)
539 p->flags |= mask;
540 else
541 p->flags &= ~mask;
542 }
543}
544
545/* Process bridge protocol info on port */
546static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
547{
548 int err;
e028e4b8 549 unsigned long old_flags = p->flags;
25c71c75 550
551 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
a2e01a65 552 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
c2d3babf 553 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
3d84fa98 554 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
9ba18891 555 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
867a5943 556 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
95850116 557 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
842a9ae0 558 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
25c71c75 559
560 if (tb[IFLA_BRPORT_COST]) {
561 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
562 if (err)
563 return err;
564 }
565
566 if (tb[IFLA_BRPORT_PRIORITY]) {
567 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
568 if (err)
569 return err;
570 }
571
572 if (tb[IFLA_BRPORT_STATE]) {
573 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
574 if (err)
575 return err;
576 }
e028e4b8
VY		 577
578 br_port_flags_change(p, old_flags ^ p->flags);
25c71c75 579 return 0;
580}
581
582/* Change state and parameters on port. */
add511b3 583int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
11dc1f36 584{
74685962 585 struct nlattr *protinfo;
407af329 586 struct nlattr *afspec;
11dc1f36 587 struct net_bridge_port *p;
2062cc20 588 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
68e331c7 589 int err = 0, ret_offload = 0;
11dc1f36 590
c60ee67f
H		 591 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
592 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
407af329 593 if (!protinfo && !afspec)
25c71c75 594 return 0;
11dc1f36 595
ec1e5610 596 p = br_port_get_rtnl(dev);
407af329 597 /* We want to accept dev as bridge itself if the AF_SPEC
8e3bff96 598 * is set to see if someone is setting vlan info on the bridge
407af329 599 */
7b99a993 600 if (!p && !afspec)
b5ed54e9 601 return -EINVAL;
11dc1f36 602
407af329
VY		 603 if (p && protinfo) {
604 if (protinfo->nla_type & NLA_F_NESTED) {
605 err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
3ac636b8 606 protinfo, br_port_policy);
407af329
VY		 607 if (err)
608 return err;
609
610 spin_lock_bh(&p->br->lock);
611 err = br_setport(p, tb);
612 spin_unlock_bh(&p->br->lock);
613 } else {
8e3bff96 614 /* Binary compatibility with old RSTP */
407af329
VY		 615 if (nla_len(protinfo) < sizeof(u8))
616 return -EINVAL;
617
618 spin_lock_bh(&p->br->lock);
619 err = br_set_port_state(p, nla_get_u8(protinfo));
620 spin_unlock_bh(&p->br->lock);
621 }
25c71c75 622 if (err)
407af329
VY		 623 goto out;
624 }
11dc1f36 625
407af329
VY		 626 if (afspec) {
627 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
628 afspec, RTM_SETLINK);
25c71c75 629 }
b03b6dd5 630
1fd0bddb 631 if (p && !(flags & BRIDGE_FLAGS_SELF)) {
68e331c7
RP		 632 /* set bridge attributes in hardware if supported
633 */
634 ret_offload = netdev_switch_port_bridge_setlink(dev, nlh,
635 flags);
636 if (ret_offload && ret_offload != -EOPNOTSUPP)
637 br_warn(p->br, "error setting attrs on port %u(%s)\n",
638 (unsigned int)p->port_no, p->dev->name);
639 }
640
25c71c75 641 if (err == 0)
642 br_ifinfo_notify(RTM_NEWLINK, p);
407af329 643out:
25c71c75 644 return err;
11dc1f36
SH		 645}
646
407af329 647/* Delete port information */
add511b3 648int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
407af329 649{
407af329
VY		 650 struct nlattr *afspec;
651 struct net_bridge_port *p;
68e331c7 652 int err = 0, ret_offload = 0;
407af329 653
c60ee67f 654 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
407af329
VY		 655 if (!afspec)
656 return 0;
657
658 p = br_port_get_rtnl(dev);
659 /* We want to accept dev as bridge itself as well */
660 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
661 return -EINVAL;
662
663 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
664 afspec, RTM_DELLINK);
02dba438
RP		 665 if (err == 0)
666 /* Send RTM_NEWLINK because userspace
667 * expects RTM_NEWLINK for vlan dels
668 */
669 br_ifinfo_notify(RTM_NEWLINK, p);
407af329 670
1fd0bddb 671 if (p && !(flags & BRIDGE_FLAGS_SELF)) {
68e331c7
RP		 672 /* del bridge attributes in hardware
673 */
674 ret_offload = netdev_switch_port_bridge_dellink(dev, nlh,
675 flags);
676 if (ret_offload && ret_offload != -EOPNOTSUPP)
677 br_warn(p->br, "error deleting attrs on port %u (%s)\n",
678 (unsigned int)p->port_no, p->dev->name);
679 }
680
407af329
VY		 681 return err;
682}
bb900b27 683static int br_validate(struct nlattr *tb[], struct nlattr *data[])
684{
685 if (tb[IFLA_ADDRESS]) {
686 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
687 return -EINVAL;
688 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
689 return -EADDRNOTAVAIL;
690 }
691
692 return 0;
693}
694
30313a3d
TM		 695static int br_dev_newlink(struct net *src_net, struct net_device *dev,
696 struct nlattr *tb[], struct nlattr *data[])
697{
698 struct net_bridge *br = netdev_priv(dev);
699
700 if (tb[IFLA_ADDRESS]) {
701 spin_lock_bh(&br->lock);
702 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
703 spin_unlock_bh(&br->lock);
704 }
705
706 return register_netdevice(dev);
707}
708
3ac636b8
JP		 709static int br_port_slave_changelink(struct net_device *brdev,
710 struct net_device *dev,
711 struct nlattr *tb[],
712 struct nlattr *data[])
713{
714 if (!data)
715 return 0;
716 return br_setport(br_port_get_rtnl(dev), data);
717}
718
ced8283f
JP		 719static int br_port_fill_slave_info(struct sk_buff *skb,
720 const struct net_device *brdev,
721 const struct net_device *dev)
722{
723 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
724}
725
726static size_t br_port_get_slave_size(const struct net_device *brdev,
727 const struct net_device *dev)
728{
729 return br_port_info_size();
730}
731
13323516
JP		 732static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
733 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
734 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
735 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
af615762
JT		 736 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
737 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
738 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
13323516
JP		 739};
740
741static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
742 struct nlattr *data[])
743{
744 struct net_bridge *br = netdev_priv(brdev);
745 int err;
746
747 if (!data)
748 return 0;
749
750 if (data[IFLA_BR_FORWARD_DELAY]) {
751 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
752 if (err)
753 return err;
754 }
755
756 if (data[IFLA_BR_HELLO_TIME]) {
757 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
758 if (err)
759 return err;
760 }
761
762 if (data[IFLA_BR_MAX_AGE]) {
763 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
764 if (err)
765 return err;
766 }
767
af615762
JT		 768 if (data[IFLA_BR_AGEING_TIME]) {
769 u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]);
770
771 br->ageing_time = clock_t_to_jiffies(ageing_time);
772 }
773
774 if (data[IFLA_BR_STP_STATE]) {
775 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
776
777 br_stp_set_enabled(br, stp_enabled);
778 }
779
780 if (data[IFLA_BR_PRIORITY]) {
781 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
782
783 br_stp_set_bridge_priority(br, priority);
784 }
785
13323516
JP		 786 return 0;
787}
788
e5c3ea5c
JP		 789static size_t br_get_size(const struct net_device *brdev)
790{
791 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
792 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
793 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
af615762
JT		 794 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
795 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
796 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
e5c3ea5c
JP		 797 0;
798}
799
800static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
801{
802 struct net_bridge *br = netdev_priv(brdev);
803 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
804 u32 hello_time = jiffies_to_clock_t(br->hello_time);
805 u32 age_time = jiffies_to_clock_t(br->max_age);
af615762
JT		 806 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
807 u32 stp_enabled = br->stp_enabled;
808 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
e5c3ea5c
JP		 809
810 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
811 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
af615762
JT		 812 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
813 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
814 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
815 nla_put_u16(skb, IFLA_BR_PRIORITY, priority))
e5c3ea5c
JP		 816 return -EMSGSIZE;
817
818 return 0;
819}
820
fed0a159
RP		 821static size_t br_get_link_af_size(const struct net_device *dev)
822{
823 struct net_port_vlans *pv;
824
825 if (br_port_exists(dev))
826 pv = nbp_get_vlan_info(br_port_get_rtnl(dev));
827 else if (dev->priv_flags & IFF_EBRIDGE)
828 pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
829 else
830 return 0;
831
832 if (!pv)
833 return 0;
834
835 /* Each VLAN is returned in bridge_vlan_info along with flags */
836 return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
837}
838
207895fd 839static struct rtnl_af_ops br_af_ops __read_mostly = {
6cbdceeb
VY		 840 .family = AF_BRIDGE,
841 .get_link_af_size = br_get_link_af_size,
842};
843
149ddd83 844struct rtnl_link_ops br_link_ops __read_mostly = {
ced8283f
JP		 845 .kind = "bridge",
846 .priv_size = sizeof(struct net_bridge),
847 .setup = br_dev_setup,
13323516
JP		 848 .maxtype = IFLA_BRPORT_MAX,
849 .policy = br_policy,
ced8283f
JP		 850 .validate = br_validate,
851 .newlink = br_dev_newlink,
13323516 852 .changelink = br_changelink,
ced8283f 853 .dellink = br_dev_delete,
e5c3ea5c
JP		 854 .get_size = br_get_size,
855 .fill_info = br_fill_info,
3ac636b8
JP		 856
857 .slave_maxtype = IFLA_BRPORT_MAX,
858 .slave_policy = br_port_policy,
859 .slave_changelink = br_port_slave_changelink,
ced8283f
JP		 860 .get_slave_size = br_port_get_slave_size,
861 .fill_slave_info = br_port_fill_slave_info,
bb900b27 862};
11dc1f36 863
32fe21c0 864int __init br_netlink_init(void)
11dc1f36 865{
3ec8e9f0
VY		 866 int err;
867
868 br_mdb_init();
3678a9d8 869 rtnl_af_register(&br_af_ops);
3ec8e9f0 870
6cbdceeb
VY		 871 err = rtnl_link_register(&br_link_ops);
872 if (err)
873 goto out_af;
874
3ec8e9f0 875 return 0;
6cbdceeb
VY		 876
877out_af:
878 rtnl_af_unregister(&br_af_ops);
3ec8e9f0
VY		 879 br_mdb_uninit();
880 return err;
11dc1f36
SH		 881}
882
34666d46 883void br_netlink_fini(void)
11dc1f36 884{
3ec8e9f0 885 br_mdb_uninit();
6cbdceeb 886 rtnl_af_unregister(&br_af_ops);
bb900b27 887 rtnl_link_unregister(&br_link_ops);
11dc1f36 888}
Linux 6.x block layer and io_uring tree(s)