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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>
14#include <linux/slab.h>
15#include <linux/etherdevice.h>
16#include <net/rtnetlink.h>
17#include <net/net_namespace.h>
18#include <net/sock.h>
19#include <uapi/linux/if_bridge.h>
20
21#include "br_private.h"
22#include "br_private_stp.h"
23
24static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
25 u32 filter_mask)
26{
27 struct net_bridge_vlan *v;
28 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
29 u16 flags, pvid;
30 int num_vlans = 0;
31
32 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
33 return 0;
34
35 pvid = br_get_pvid(vg);
36 /* Count number of vlan infos */
37 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
38 flags = 0;
39 /* only a context, bridge vlan not activated */
40 if (!br_vlan_should_use(v))
41 continue;
42 if (v->vid == pvid)
43 flags |= BRIDGE_VLAN_INFO_PVID;
44
45 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
46 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
47
48 if (vid_range_start == 0) {
49 goto initvars;
50 } else if ((v->vid - vid_range_end) == 1 &&
51 flags == vid_range_flags) {
52 vid_range_end = v->vid;
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:
61 vid_range_start = v->vid;
62 vid_range_end = v->vid;
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
76static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
77 u32 filter_mask)
78{
79 int num_vlans;
80
81 if (!vg)
82 return 0;
83
84 if (filter_mask & RTEXT_FILTER_BRVLAN)
85 return vg->num_vlans;
86
87 rcu_read_lock();
88 num_vlans = __get_num_vlan_infos(vg, filter_mask);
89 rcu_read_unlock();
90
91 return num_vlans;
92}
93
94static size_t br_get_link_af_size_filtered(const struct net_device *dev,
95 u32 filter_mask)
96{
97 struct net_bridge_vlan_group *vg = NULL;
98 struct net_bridge_port *p;
99 struct net_bridge *br;
100 int num_vlan_infos;
101
102 rcu_read_lock();
103 if (br_port_exists(dev)) {
104 p = br_port_get_rcu(dev);
105 vg = nbp_vlan_group_rcu(p);
106 } else if (dev->priv_flags & IFF_EBRIDGE) {
107 br = netdev_priv(dev);
108 vg = br_vlan_group_rcu(br);
109 }
110 num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
111 rcu_read_unlock();
112
113 /* Each VLAN is returned in bridge_vlan_info along with flags */
114 return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
115}
116
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 */
123 + nla_total_size(1) /* IFLA_BRPORT_GUARD */
124 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
125 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
126 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
127 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
128 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
129 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
130 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
131 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
132 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */
133 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */
134 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */
135 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */
136 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
137 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */
138 + nla_total_size(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
139 + nla_total_size(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
140 + nla_total_size(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
141#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
142 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */
143#endif
144 + 0;
145}
146
147static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
148{
149 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
150 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
151 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
152 + nla_total_size(4) /* IFLA_MASTER */
153 + nla_total_size(4) /* IFLA_MTU */
154 + nla_total_size(4) /* IFLA_LINK */
155 + nla_total_size(1) /* IFLA_OPERSTATE */
156 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
157 + nla_total_size(br_get_link_af_size_filtered(dev,
158 filter_mask)); /* IFLA_AF_SPEC */
159}
160
161static int br_port_fill_attrs(struct sk_buff *skb,
162 const struct net_bridge_port *p)
163{
164 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
165 u64 timerval;
166
167 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
168 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
169 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
170 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
171 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
172 nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
173 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
174 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
175 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
176 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
177 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
178 !!(p->flags & BR_PROXYARP_WIFI)) ||
179 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
180 &p->designated_root) ||
181 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
182 &p->designated_bridge) ||
183 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
184 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
185 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
186 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
187 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
188 p->topology_change_ack) ||
189 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending))
190 return -EMSGSIZE;
191
192 timerval = br_timer_value(&p->message_age_timer);
193 if (nla_put_u64(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval))
194 return -EMSGSIZE;
195 timerval = br_timer_value(&p->forward_delay_timer);
196 if (nla_put_u64(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval))
197 return -EMSGSIZE;
198 timerval = br_timer_value(&p->hold_timer);
199 if (nla_put_u64(skb, IFLA_BRPORT_HOLD_TIMER, timerval))
200 return -EMSGSIZE;
201
202#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
203 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
204 p->multicast_router))
205 return -EMSGSIZE;
206#endif
207
208 return 0;
209}
210
211static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
212 u16 vid_end, u16 flags)
213{
214 struct bridge_vlan_info vinfo;
215
216 if ((vid_end - vid_start) > 0) {
217 /* add range to skb */
218 vinfo.vid = vid_start;
219 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
220 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
221 sizeof(vinfo), &vinfo))
222 goto nla_put_failure;
223
224 vinfo.vid = vid_end;
225 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
226 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
227 sizeof(vinfo), &vinfo))
228 goto nla_put_failure;
229 } else {
230 vinfo.vid = vid_start;
231 vinfo.flags = flags;
232 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
233 sizeof(vinfo), &vinfo))
234 goto nla_put_failure;
235 }
236
237 return 0;
238
239nla_put_failure:
240 return -EMSGSIZE;
241}
242
243static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
244 struct net_bridge_vlan_group *vg)
245{
246 struct net_bridge_vlan *v;
247 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
248 u16 flags, pvid;
249 int err = 0;
250
251 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
252 * and mark vlan info with begin and end flags
253 * if vlaninfo represents a range
254 */
255 pvid = br_get_pvid(vg);
256 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
257 flags = 0;
258 if (!br_vlan_should_use(v))
259 continue;
260 if (v->vid == pvid)
261 flags |= BRIDGE_VLAN_INFO_PVID;
262
263 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
264 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
265
266 if (vid_range_start == 0) {
267 goto initvars;
268 } else if ((v->vid - vid_range_end) == 1 &&
269 flags == vid_range_flags) {
270 vid_range_end = v->vid;
271 continue;
272 } else {
273 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
274 vid_range_end,
275 vid_range_flags);
276 if (err)
277 return err;
278 }
279
280initvars:
281 vid_range_start = v->vid;
282 vid_range_end = v->vid;
283 vid_range_flags = flags;
284 }
285
286 if (vid_range_start != 0) {
287 /* Call it once more to send any left over vlans */
288 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
289 vid_range_end,
290 vid_range_flags);
291 if (err)
292 return err;
293 }
294
295 return 0;
296}
297
298static int br_fill_ifvlaninfo(struct sk_buff *skb,
299 struct net_bridge_vlan_group *vg)
300{
301 struct bridge_vlan_info vinfo;
302 struct net_bridge_vlan *v;
303 u16 pvid;
304
305 pvid = br_get_pvid(vg);
306 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
307 if (!br_vlan_should_use(v))
308 continue;
309
310 vinfo.vid = v->vid;
311 vinfo.flags = 0;
312 if (v->vid == pvid)
313 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
314
315 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
316 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
317
318 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
319 sizeof(vinfo), &vinfo))
320 goto nla_put_failure;
321 }
322
323 return 0;
324
325nla_put_failure:
326 return -EMSGSIZE;
327}
328
329/*
330 * Create one netlink message for one interface
331 * Contains port and master info as well as carrier and bridge state.
332 */
333static int br_fill_ifinfo(struct sk_buff *skb,
334 struct net_bridge_port *port,
335 u32 pid, u32 seq, int event, unsigned int flags,
336 u32 filter_mask, const struct net_device *dev)
337{
338 struct net_bridge *br;
339 struct ifinfomsg *hdr;
340 struct nlmsghdr *nlh;
341 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
342
343 if (port)
344 br = port->br;
345 else
346 br = netdev_priv(dev);
347
348 br_debug(br, "br_fill_info event %d port %s master %s\n",
349 event, dev->name, br->dev->name);
350
351 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
352 if (nlh == NULL)
353 return -EMSGSIZE;
354
355 hdr = nlmsg_data(nlh);
356 hdr->ifi_family = AF_BRIDGE;
357 hdr->__ifi_pad = 0;
358 hdr->ifi_type = dev->type;
359 hdr->ifi_index = dev->ifindex;
360 hdr->ifi_flags = dev_get_flags(dev);
361 hdr->ifi_change = 0;
362
363 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
364 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
365 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
366 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
367 (dev->addr_len &&
368 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
369 (dev->ifindex != dev_get_iflink(dev) &&
370 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
371 goto nla_put_failure;
372
373 if (event == RTM_NEWLINK && port) {
374 struct nlattr *nest
375 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
376
377 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
378 goto nla_put_failure;
379 nla_nest_end(skb, nest);
380 }
381
382 /* Check if the VID information is requested */
383 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
384 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
385 struct net_bridge_vlan_group *vg;
386 struct nlattr *af;
387 int err;
388
389 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
390 rcu_read_lock();
391 if (port)
392 vg = nbp_vlan_group_rcu(port);
393 else
394 vg = br_vlan_group_rcu(br);
395
396 if (!vg || !vg->num_vlans) {
397 rcu_read_unlock();
398 goto done;
399 }
400 af = nla_nest_start(skb, IFLA_AF_SPEC);
401 if (!af) {
402 rcu_read_unlock();
403 goto nla_put_failure;
404 }
405 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
406 err = br_fill_ifvlaninfo_compressed(skb, vg);
407 else
408 err = br_fill_ifvlaninfo(skb, vg);
409 rcu_read_unlock();
410 if (err)
411 goto nla_put_failure;
412 nla_nest_end(skb, af);
413 }
414
415done:
416 nlmsg_end(skb, nlh);
417 return 0;
418
419nla_put_failure:
420 nlmsg_cancel(skb, nlh);
421 return -EMSGSIZE;
422}
423
424/*
425 * Notify listeners of a change in port information
426 */
427void br_ifinfo_notify(int event, struct net_bridge_port *port)
428{
429 struct net *net;
430 struct sk_buff *skb;
431 int err = -ENOBUFS;
432 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
433
434 if (!port)
435 return;
436
437 net = dev_net(port->dev);
438 br_debug(port->br, "port %u(%s) event %d\n",
439 (unsigned int)port->port_no, port->dev->name, event);
440
441 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
442 if (skb == NULL)
443 goto errout;
444
445 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
446 if (err < 0) {
447 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
448 WARN_ON(err == -EMSGSIZE);
449 kfree_skb(skb);
450 goto errout;
451 }
452 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
453 return;
454errout:
455 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
456}
457
458
459/*
460 * Dump information about all ports, in response to GETLINK
461 */
462int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
463 struct net_device *dev, u32 filter_mask, int nlflags)
464{
465 struct net_bridge_port *port = br_port_get_rtnl(dev);
466
467 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
468 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
469 return 0;
470
471 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
472 filter_mask, dev);
473}
474
475static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
476 int cmd, struct bridge_vlan_info *vinfo)
477{
478 int err = 0;
479
480 switch (cmd) {
481 case RTM_SETLINK:
482 if (p) {
483 /* if the MASTER flag is set this will act on the global
484 * per-VLAN entry as well
485 */
486 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
487 if (err)
488 break;
489 } else {
490 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
491 err = br_vlan_add(br, vinfo->vid, vinfo->flags);
492 }
493 break;
494
495 case RTM_DELLINK:
496 if (p) {
497 nbp_vlan_delete(p, vinfo->vid);
498 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
499 br_vlan_delete(p->br, vinfo->vid);
500 } else {
501 br_vlan_delete(br, vinfo->vid);
502 }
503 break;
504 }
505
506 return err;
507}
508
509static int br_afspec(struct net_bridge *br,
510 struct net_bridge_port *p,
511 struct nlattr *af_spec,
512 int cmd)
513{
514 struct bridge_vlan_info *vinfo_start = NULL;
515 struct bridge_vlan_info *vinfo = NULL;
516 struct nlattr *attr;
517 int err = 0;
518 int rem;
519
520 nla_for_each_nested(attr, af_spec, rem) {
521 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
522 continue;
523 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
524 return -EINVAL;
525 vinfo = nla_data(attr);
526 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
527 return -EINVAL;
528 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
529 if (vinfo_start)
530 return -EINVAL;
531 vinfo_start = vinfo;
532 /* don't allow range of pvids */
533 if (vinfo_start->flags & BRIDGE_VLAN_INFO_PVID)
534 return -EINVAL;
535 continue;
536 }
537
538 if (vinfo_start) {
539 struct bridge_vlan_info tmp_vinfo;
540 int v;
541
542 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
543 return -EINVAL;
544
545 if (vinfo->vid <= vinfo_start->vid)
546 return -EINVAL;
547
548 memcpy(&tmp_vinfo, vinfo_start,
549 sizeof(struct bridge_vlan_info));
550
551 for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
552 tmp_vinfo.vid = v;
553 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
554 if (err)
555 break;
556 }
557 vinfo_start = NULL;
558 } else {
559 err = br_vlan_info(br, p, cmd, vinfo);
560 }
561 if (err)
562 break;
563 }
564
565 return err;
566}
567
568static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
569 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
570 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
571 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
572 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
573 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
574 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
575 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
576 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
577 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
578 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
579 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
580 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
581};
582
583/* Change the state of the port and notify spanning tree */
584static int br_set_port_state(struct net_bridge_port *p, u8 state)
585{
586 if (state > BR_STATE_BLOCKING)
587 return -EINVAL;
588
589 /* if kernel STP is running, don't allow changes */
590 if (p->br->stp_enabled == BR_KERNEL_STP)
591 return -EBUSY;
592
593 /* if device is not up, change is not allowed
594 * if link is not present, only allowable state is disabled
595 */
596 if (!netif_running(p->dev) ||
597 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
598 return -ENETDOWN;
599
600 br_set_state(p, state);
601 br_port_state_selection(p->br);
602 return 0;
603}
604
605/* Set/clear or port flags based on attribute */
606static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
607 int attrtype, unsigned long mask)
608{
609 if (tb[attrtype]) {
610 u8 flag = nla_get_u8(tb[attrtype]);
611 if (flag)
612 p->flags |= mask;
613 else
614 p->flags &= ~mask;
615 }
616}
617
618/* Process bridge protocol info on port */
619static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
620{
621 int err;
622 unsigned long old_flags = p->flags;
623
624 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
625 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
626 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
627 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
628 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
629 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
630 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
631 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
632
633 if (tb[IFLA_BRPORT_COST]) {
634 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
635 if (err)
636 return err;
637 }
638
639 if (tb[IFLA_BRPORT_PRIORITY]) {
640 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
641 if (err)
642 return err;
643 }
644
645 if (tb[IFLA_BRPORT_STATE]) {
646 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
647 if (err)
648 return err;
649 }
650
651 if (tb[IFLA_BRPORT_FLUSH])
652 br_fdb_delete_by_port(p->br, p, 0, 0);
653
654#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
655 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
656 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
657
658 err = br_multicast_set_port_router(p, mcast_router);
659 if (err)
660 return err;
661 }
662#endif
663 br_port_flags_change(p, old_flags ^ p->flags);
664 return 0;
665}
666
667/* Change state and parameters on port. */
668int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
669{
670 struct nlattr *protinfo;
671 struct nlattr *afspec;
672 struct net_bridge_port *p;
673 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
674 int err = 0;
675
676 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
677 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
678 if (!protinfo && !afspec)
679 return 0;
680
681 p = br_port_get_rtnl(dev);
682 /* We want to accept dev as bridge itself if the AF_SPEC
683 * is set to see if someone is setting vlan info on the bridge
684 */
685 if (!p && !afspec)
686 return -EINVAL;
687
688 if (p && protinfo) {
689 if (protinfo->nla_type & NLA_F_NESTED) {
690 err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
691 protinfo, br_port_policy);
692 if (err)
693 return err;
694
695 spin_lock_bh(&p->br->lock);
696 err = br_setport(p, tb);
697 spin_unlock_bh(&p->br->lock);
698 } else {
699 /* Binary compatibility with old RSTP */
700 if (nla_len(protinfo) < sizeof(u8))
701 return -EINVAL;
702
703 spin_lock_bh(&p->br->lock);
704 err = br_set_port_state(p, nla_get_u8(protinfo));
705 spin_unlock_bh(&p->br->lock);
706 }
707 if (err)
708 goto out;
709 }
710
711 if (afspec) {
712 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
713 afspec, RTM_SETLINK);
714 }
715
716 if (err == 0)
717 br_ifinfo_notify(RTM_NEWLINK, p);
718out:
719 return err;
720}
721
722/* Delete port information */
723int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
724{
725 struct nlattr *afspec;
726 struct net_bridge_port *p;
727 int err = 0;
728
729 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
730 if (!afspec)
731 return 0;
732
733 p = br_port_get_rtnl(dev);
734 /* We want to accept dev as bridge itself as well */
735 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
736 return -EINVAL;
737
738 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
739 afspec, RTM_DELLINK);
740 if (err == 0)
741 /* Send RTM_NEWLINK because userspace
742 * expects RTM_NEWLINK for vlan dels
743 */
744 br_ifinfo_notify(RTM_NEWLINK, p);
745
746 return err;
747}
748static int br_validate(struct nlattr *tb[], struct nlattr *data[])
749{
750 if (tb[IFLA_ADDRESS]) {
751 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
752 return -EINVAL;
753 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
754 return -EADDRNOTAVAIL;
755 }
756
757 if (!data)
758 return 0;
759
760#ifdef CONFIG_BRIDGE_VLAN_FILTERING
761 if (data[IFLA_BR_VLAN_PROTOCOL]) {
762 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
763 case htons(ETH_P_8021Q):
764 case htons(ETH_P_8021AD):
765 break;
766 default:
767 return -EPROTONOSUPPORT;
768 }
769 }
770#endif
771
772 return 0;
773}
774
775static int br_dev_newlink(struct net *src_net, struct net_device *dev,
776 struct nlattr *tb[], struct nlattr *data[])
777{
778 struct net_bridge *br = netdev_priv(dev);
779
780 if (tb[IFLA_ADDRESS]) {
781 spin_lock_bh(&br->lock);
782 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
783 spin_unlock_bh(&br->lock);
784 }
785
786 return register_netdevice(dev);
787}
788
789static int br_port_slave_changelink(struct net_device *brdev,
790 struct net_device *dev,
791 struct nlattr *tb[],
792 struct nlattr *data[])
793{
794 struct net_bridge *br = netdev_priv(brdev);
795 int ret;
796
797 if (!data)
798 return 0;
799
800 spin_lock_bh(&br->lock);
801 ret = br_setport(br_port_get_rtnl(dev), data);
802 spin_unlock_bh(&br->lock);
803
804 return ret;
805}
806
807static int br_port_fill_slave_info(struct sk_buff *skb,
808 const struct net_device *brdev,
809 const struct net_device *dev)
810{
811 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
812}
813
814static size_t br_port_get_slave_size(const struct net_device *brdev,
815 const struct net_device *dev)
816{
817 return br_port_info_size();
818}
819
820static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
821 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
822 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
823 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
824 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
825 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
826 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
827 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
828 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
829 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
830 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
831 .len = ETH_ALEN },
832 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
833 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
834 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
835 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
836 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
837 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
838 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
839 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
840 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
841 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
842 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
843 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
844 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
845 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
846 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
847 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
848 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
849 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
850};
851
852static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
853 struct nlattr *data[])
854{
855 struct net_bridge *br = netdev_priv(brdev);
856 int err;
857
858 if (!data)
859 return 0;
860
861 if (data[IFLA_BR_FORWARD_DELAY]) {
862 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
863 if (err)
864 return err;
865 }
866
867 if (data[IFLA_BR_HELLO_TIME]) {
868 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
869 if (err)
870 return err;
871 }
872
873 if (data[IFLA_BR_MAX_AGE]) {
874 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
875 if (err)
876 return err;
877 }
878
879 if (data[IFLA_BR_AGEING_TIME]) {
880 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
881 if (err)
882 return err;
883 }
884
885 if (data[IFLA_BR_STP_STATE]) {
886 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
887
888 br_stp_set_enabled(br, stp_enabled);
889 }
890
891 if (data[IFLA_BR_PRIORITY]) {
892 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
893
894 br_stp_set_bridge_priority(br, priority);
895 }
896
897 if (data[IFLA_BR_VLAN_FILTERING]) {
898 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
899
900 err = __br_vlan_filter_toggle(br, vlan_filter);
901 if (err)
902 return err;
903 }
904
905#ifdef CONFIG_BRIDGE_VLAN_FILTERING
906 if (data[IFLA_BR_VLAN_PROTOCOL]) {
907 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
908
909 err = __br_vlan_set_proto(br, vlan_proto);
910 if (err)
911 return err;
912 }
913
914 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
915 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
916
917 err = __br_vlan_set_default_pvid(br, defpvid);
918 if (err)
919 return err;
920 }
921#endif
922
923 if (data[IFLA_BR_GROUP_FWD_MASK]) {
924 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
925
926 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
927 return -EINVAL;
928 br->group_fwd_mask = fwd_mask;
929 }
930
931 if (data[IFLA_BR_GROUP_ADDR]) {
932 u8 new_addr[ETH_ALEN];
933
934 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
935 return -EINVAL;
936 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
937 if (!is_link_local_ether_addr(new_addr))
938 return -EINVAL;
939 if (new_addr[5] == 1 || /* 802.3x Pause address */
940 new_addr[5] == 2 || /* 802.3ad Slow protocols */
941 new_addr[5] == 3) /* 802.1X PAE address */
942 return -EINVAL;
943 spin_lock_bh(&br->lock);
944 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
945 spin_unlock_bh(&br->lock);
946 br->group_addr_set = true;
947 br_recalculate_fwd_mask(br);
948 }
949
950 if (data[IFLA_BR_FDB_FLUSH])
951 br_fdb_flush(br);
952
953#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
954 if (data[IFLA_BR_MCAST_ROUTER]) {
955 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
956
957 err = br_multicast_set_router(br, multicast_router);
958 if (err)
959 return err;
960 }
961
962 if (data[IFLA_BR_MCAST_SNOOPING]) {
963 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
964
965 err = br_multicast_toggle(br, mcast_snooping);
966 if (err)
967 return err;
968 }
969
970 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
971 u8 val;
972
973 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
974 br->multicast_query_use_ifaddr = !!val;
975 }
976
977 if (data[IFLA_BR_MCAST_QUERIER]) {
978 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
979
980 err = br_multicast_set_querier(br, mcast_querier);
981 if (err)
982 return err;
983 }
984
985 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
986 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
987
988 br->hash_elasticity = val;
989 }
990
991 if (data[IFLA_BR_MCAST_HASH_MAX]) {
992 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
993
994 err = br_multicast_set_hash_max(br, hash_max);
995 if (err)
996 return err;
997 }
998
999 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1000 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1001
1002 br->multicast_last_member_count = val;
1003 }
1004
1005 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1006 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1007
1008 br->multicast_startup_query_count = val;
1009 }
1010
1011 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1012 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1013
1014 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1015 }
1016
1017 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1018 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1019
1020 br->multicast_membership_interval = clock_t_to_jiffies(val);
1021 }
1022
1023 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1024 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1025
1026 br->multicast_querier_interval = clock_t_to_jiffies(val);
1027 }
1028
1029 if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1030 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1031
1032 br->multicast_query_interval = clock_t_to_jiffies(val);
1033 }
1034
1035 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1036 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1037
1038 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1039 }
1040
1041 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1042 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1043
1044 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1045 }
1046#endif
1047#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1048 if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1049 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1050
1051 br->nf_call_iptables = val ? true : false;
1052 }
1053
1054 if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1055 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1056
1057 br->nf_call_ip6tables = val ? true : false;
1058 }
1059
1060 if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1061 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1062
1063 br->nf_call_arptables = val ? true : false;
1064 }
1065#endif
1066
1067 return 0;
1068}
1069
1070static size_t br_get_size(const struct net_device *brdev)
1071{
1072 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
1073 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
1074 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
1075 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
1076 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
1077 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
1078 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
1079#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1080 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1081 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */
1082#endif
1083 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
1084 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */
1085 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */
1086 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */
1087 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */
1088 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */
1089 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1090 nla_total_size(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1091 nla_total_size(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1092 nla_total_size(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1093 nla_total_size(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1094 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
1095#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1096 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */
1097 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */
1098 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1099 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */
1100 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */
1101 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */
1102 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1103 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1104 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1105 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1106 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1107 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1108 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1109 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1110#endif
1111#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1112 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */
1113 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */
1114 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */
1115#endif
1116 0;
1117}
1118
1119static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1120{
1121 struct net_bridge *br = netdev_priv(brdev);
1122 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1123 u32 hello_time = jiffies_to_clock_t(br->hello_time);
1124 u32 age_time = jiffies_to_clock_t(br->max_age);
1125 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1126 u32 stp_enabled = br->stp_enabled;
1127 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1128 u8 vlan_enabled = br_vlan_enabled(br);
1129 u64 clockval;
1130
1131 clockval = br_timer_value(&br->hello_timer);
1132 if (nla_put_u64(skb, IFLA_BR_HELLO_TIMER, clockval))
1133 return -EMSGSIZE;
1134 clockval = br_timer_value(&br->tcn_timer);
1135 if (nla_put_u64(skb, IFLA_BR_TCN_TIMER, clockval))
1136 return -EMSGSIZE;
1137 clockval = br_timer_value(&br->topology_change_timer);
1138 if (nla_put_u64(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval))
1139 return -EMSGSIZE;
1140 clockval = br_timer_value(&br->gc_timer);
1141 if (nla_put_u64(skb, IFLA_BR_GC_TIMER, clockval))
1142 return -EMSGSIZE;
1143
1144 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1145 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1146 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1147 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1148 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1149 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1150 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1151 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1152 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1153 &br->bridge_id) ||
1154 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1155 &br->designated_root) ||
1156 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1157 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1158 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1159 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1160 br->topology_change_detected) ||
1161 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1162 return -EMSGSIZE;
1163
1164#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1165 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1166 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid))
1167 return -EMSGSIZE;
1168#endif
1169#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1170 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1171 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1172 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1173 br->multicast_query_use_ifaddr) ||
1174 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1175 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1176 br->hash_elasticity) ||
1177 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1178 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1179 br->multicast_last_member_count) ||
1180 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1181 br->multicast_startup_query_count))
1182 return -EMSGSIZE;
1183
1184 clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1185 if (nla_put_u64(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval))
1186 return -EMSGSIZE;
1187 clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1188 if (nla_put_u64(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval))
1189 return -EMSGSIZE;
1190 clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1191 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval))
1192 return -EMSGSIZE;
1193 clockval = jiffies_to_clock_t(br->multicast_query_interval);
1194 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval))
1195 return -EMSGSIZE;
1196 clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1197 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval))
1198 return -EMSGSIZE;
1199 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1200 if (nla_put_u64(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval))
1201 return -EMSGSIZE;
1202#endif
1203#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1204 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1205 br->nf_call_iptables ? 1 : 0) ||
1206 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1207 br->nf_call_ip6tables ? 1 : 0) ||
1208 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1209 br->nf_call_arptables ? 1 : 0))
1210 return -EMSGSIZE;
1211#endif
1212
1213 return 0;
1214}
1215
1216
1217static struct rtnl_af_ops br_af_ops __read_mostly = {
1218 .family = AF_BRIDGE,
1219 .get_link_af_size = br_get_link_af_size_filtered,
1220};
1221
1222struct rtnl_link_ops br_link_ops __read_mostly = {
1223 .kind = "bridge",
1224 .priv_size = sizeof(struct net_bridge),
1225 .setup = br_dev_setup,
1226 .maxtype = IFLA_BR_MAX,
1227 .policy = br_policy,
1228 .validate = br_validate,
1229 .newlink = br_dev_newlink,
1230 .changelink = br_changelink,
1231 .dellink = br_dev_delete,
1232 .get_size = br_get_size,
1233 .fill_info = br_fill_info,
1234
1235 .slave_maxtype = IFLA_BRPORT_MAX,
1236 .slave_policy = br_port_policy,
1237 .slave_changelink = br_port_slave_changelink,
1238 .get_slave_size = br_port_get_slave_size,
1239 .fill_slave_info = br_port_fill_slave_info,
1240};
1241
1242int __init br_netlink_init(void)
1243{
1244 int err;
1245
1246 br_mdb_init();
1247 rtnl_af_register(&br_af_ops);
1248
1249 err = rtnl_link_register(&br_link_ops);
1250 if (err)
1251 goto out_af;
1252
1253 return 0;
1254
1255out_af:
1256 rtnl_af_unregister(&br_af_ops);
1257 br_mdb_uninit();
1258 return err;
1259}
1260
1261void br_netlink_fini(void)
1262{
1263 br_mdb_uninit();
1264 rtnl_af_unregister(&br_af_ops);
1265 rtnl_link_unregister(&br_link_ops);
1266}
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>
14#include <linux/slab.h>
15#include <linux/etherdevice.h>
16#include <net/rtnetlink.h>
17#include <net/net_namespace.h>
18#include <net/sock.h>
19#include <uapi/linux/if_bridge.h>
20
21#include "br_private.h"
22#include "br_private_stp.h"
23#include "br_private_tunnel.h"
24
25static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
26 u32 filter_mask)
27{
28 struct net_bridge_vlan *v;
29 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
30 u16 flags, pvid;
31 int num_vlans = 0;
32
33 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
34 return 0;
35
36 pvid = br_get_pvid(vg);
37 /* Count number of vlan infos */
38 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
39 flags = 0;
40 /* only a context, bridge vlan not activated */
41 if (!br_vlan_should_use(v))
42 continue;
43 if (v->vid == pvid)
44 flags |= BRIDGE_VLAN_INFO_PVID;
45
46 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
47 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
48
49 if (vid_range_start == 0) {
50 goto initvars;
51 } else if ((v->vid - vid_range_end) == 1 &&
52 flags == vid_range_flags) {
53 vid_range_end = v->vid;
54 continue;
55 } else {
56 if ((vid_range_end - vid_range_start) > 0)
57 num_vlans += 2;
58 else
59 num_vlans += 1;
60 }
61initvars:
62 vid_range_start = v->vid;
63 vid_range_end = v->vid;
64 vid_range_flags = flags;
65 }
66
67 if (vid_range_start != 0) {
68 if ((vid_range_end - vid_range_start) > 0)
69 num_vlans += 2;
70 else
71 num_vlans += 1;
72 }
73
74 return num_vlans;
75}
76
77static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
78 u32 filter_mask)
79{
80 int num_vlans;
81
82 if (!vg)
83 return 0;
84
85 if (filter_mask & RTEXT_FILTER_BRVLAN)
86 return vg->num_vlans;
87
88 rcu_read_lock();
89 num_vlans = __get_num_vlan_infos(vg, filter_mask);
90 rcu_read_unlock();
91
92 return num_vlans;
93}
94
95static size_t br_get_link_af_size_filtered(const struct net_device *dev,
96 u32 filter_mask)
97{
98 struct net_bridge_vlan_group *vg = NULL;
99 struct net_bridge_port *p = NULL;
100 struct net_bridge *br;
101 int num_vlan_infos;
102 size_t vinfo_sz = 0;
103
104 rcu_read_lock();
105 if (br_port_exists(dev)) {
106 p = br_port_get_rcu(dev);
107 vg = nbp_vlan_group_rcu(p);
108 } else if (dev->priv_flags & IFF_EBRIDGE) {
109 br = netdev_priv(dev);
110 vg = br_vlan_group_rcu(br);
111 }
112 num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
113 rcu_read_unlock();
114
115 if (p && (p->flags & BR_VLAN_TUNNEL))
116 vinfo_sz += br_get_vlan_tunnel_info_size(vg);
117
118 /* Each VLAN is returned in bridge_vlan_info along with flags */
119 vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
120
121 return vinfo_sz;
122}
123
124static inline size_t br_port_info_size(void)
125{
126 return nla_total_size(1) /* IFLA_BRPORT_STATE */
127 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */
128 + nla_total_size(4) /* IFLA_BRPORT_COST */
129 + nla_total_size(1) /* IFLA_BRPORT_MODE */
130 + nla_total_size(1) /* IFLA_BRPORT_GUARD */
131 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
132 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
133 + nla_total_size(1) /* IFLA_BRPORT_MCAST_TO_UCAST */
134 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
135 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
136 + nla_total_size(1) /* IFLA_BRPORT_MCAST_FLOOD */
137 + nla_total_size(1) /* IFLA_BRPORT_BCAST_FLOOD */
138 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
139 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
140 + nla_total_size(1) /* IFLA_BRPORT_VLAN_TUNNEL */
141 + nla_total_size(1) /* IFLA_BRPORT_NEIGH_SUPPRESS */
142 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
143 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
144 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */
145 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */
146 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */
147 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */
148 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
149 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */
150 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
151 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
152 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
153#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
154 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */
155#endif
156 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_GROUP_FWD_MASK */
157 + 0;
158}
159
160static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
161{
162 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
163 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
164 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
165 + nla_total_size(4) /* IFLA_MASTER */
166 + nla_total_size(4) /* IFLA_MTU */
167 + nla_total_size(4) /* IFLA_LINK */
168 + nla_total_size(1) /* IFLA_OPERSTATE */
169 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
170 + nla_total_size(br_get_link_af_size_filtered(dev,
171 filter_mask)); /* IFLA_AF_SPEC */
172}
173
174static int br_port_fill_attrs(struct sk_buff *skb,
175 const struct net_bridge_port *p)
176{
177 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
178 u64 timerval;
179
180 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
181 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
182 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
183 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
184 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
185 nla_put_u8(skb, IFLA_BRPORT_PROTECT,
186 !!(p->flags & BR_ROOT_BLOCK)) ||
187 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
188 !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
189 nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
190 !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
191 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
192 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
193 !!(p->flags & BR_FLOOD)) ||
194 nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
195 !!(p->flags & BR_MCAST_FLOOD)) ||
196 nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
197 !!(p->flags & BR_BCAST_FLOOD)) ||
198 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
199 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
200 !!(p->flags & BR_PROXYARP_WIFI)) ||
201 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
202 &p->designated_root) ||
203 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
204 &p->designated_bridge) ||
205 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
206 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
207 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
208 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
209 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
210 p->topology_change_ack) ||
211 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
212 nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
213 BR_VLAN_TUNNEL)) ||
214 nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
215 nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
216 !!(p->flags & BR_NEIGH_SUPPRESS)))
217 return -EMSGSIZE;
218
219 timerval = br_timer_value(&p->message_age_timer);
220 if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
221 IFLA_BRPORT_PAD))
222 return -EMSGSIZE;
223 timerval = br_timer_value(&p->forward_delay_timer);
224 if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
225 IFLA_BRPORT_PAD))
226 return -EMSGSIZE;
227 timerval = br_timer_value(&p->hold_timer);
228 if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
229 IFLA_BRPORT_PAD))
230 return -EMSGSIZE;
231
232#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
233 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
234 p->multicast_router))
235 return -EMSGSIZE;
236#endif
237
238 return 0;
239}
240
241static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
242 u16 vid_end, u16 flags)
243{
244 struct bridge_vlan_info vinfo;
245
246 if ((vid_end - vid_start) > 0) {
247 /* add range to skb */
248 vinfo.vid = vid_start;
249 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
250 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
251 sizeof(vinfo), &vinfo))
252 goto nla_put_failure;
253
254 vinfo.vid = vid_end;
255 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
256 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
257 sizeof(vinfo), &vinfo))
258 goto nla_put_failure;
259 } else {
260 vinfo.vid = vid_start;
261 vinfo.flags = flags;
262 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
263 sizeof(vinfo), &vinfo))
264 goto nla_put_failure;
265 }
266
267 return 0;
268
269nla_put_failure:
270 return -EMSGSIZE;
271}
272
273static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
274 struct net_bridge_vlan_group *vg)
275{
276 struct net_bridge_vlan *v;
277 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
278 u16 flags, pvid;
279 int err = 0;
280
281 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
282 * and mark vlan info with begin and end flags
283 * if vlaninfo represents a range
284 */
285 pvid = br_get_pvid(vg);
286 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
287 flags = 0;
288 if (!br_vlan_should_use(v))
289 continue;
290 if (v->vid == pvid)
291 flags |= BRIDGE_VLAN_INFO_PVID;
292
293 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
294 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
295
296 if (vid_range_start == 0) {
297 goto initvars;
298 } else if ((v->vid - vid_range_end) == 1 &&
299 flags == vid_range_flags) {
300 vid_range_end = v->vid;
301 continue;
302 } else {
303 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
304 vid_range_end,
305 vid_range_flags);
306 if (err)
307 return err;
308 }
309
310initvars:
311 vid_range_start = v->vid;
312 vid_range_end = v->vid;
313 vid_range_flags = flags;
314 }
315
316 if (vid_range_start != 0) {
317 /* Call it once more to send any left over vlans */
318 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
319 vid_range_end,
320 vid_range_flags);
321 if (err)
322 return err;
323 }
324
325 return 0;
326}
327
328static int br_fill_ifvlaninfo(struct sk_buff *skb,
329 struct net_bridge_vlan_group *vg)
330{
331 struct bridge_vlan_info vinfo;
332 struct net_bridge_vlan *v;
333 u16 pvid;
334
335 pvid = br_get_pvid(vg);
336 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
337 if (!br_vlan_should_use(v))
338 continue;
339
340 vinfo.vid = v->vid;
341 vinfo.flags = 0;
342 if (v->vid == pvid)
343 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
344
345 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
346 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
347
348 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
349 sizeof(vinfo), &vinfo))
350 goto nla_put_failure;
351 }
352
353 return 0;
354
355nla_put_failure:
356 return -EMSGSIZE;
357}
358
359/*
360 * Create one netlink message for one interface
361 * Contains port and master info as well as carrier and bridge state.
362 */
363static int br_fill_ifinfo(struct sk_buff *skb,
364 const struct net_bridge_port *port,
365 u32 pid, u32 seq, int event, unsigned int flags,
366 u32 filter_mask, const struct net_device *dev)
367{
368 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
369 struct net_bridge *br;
370 struct ifinfomsg *hdr;
371 struct nlmsghdr *nlh;
372
373 if (port)
374 br = port->br;
375 else
376 br = netdev_priv(dev);
377
378 br_debug(br, "br_fill_info event %d port %s master %s\n",
379 event, dev->name, br->dev->name);
380
381 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
382 if (nlh == NULL)
383 return -EMSGSIZE;
384
385 hdr = nlmsg_data(nlh);
386 hdr->ifi_family = AF_BRIDGE;
387 hdr->__ifi_pad = 0;
388 hdr->ifi_type = dev->type;
389 hdr->ifi_index = dev->ifindex;
390 hdr->ifi_flags = dev_get_flags(dev);
391 hdr->ifi_change = 0;
392
393 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
394 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
395 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
396 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
397 (dev->addr_len &&
398 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
399 (dev->ifindex != dev_get_iflink(dev) &&
400 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
401 goto nla_put_failure;
402
403 if (event == RTM_NEWLINK && port) {
404 struct nlattr *nest
405 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
406
407 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
408 goto nla_put_failure;
409 nla_nest_end(skb, nest);
410 }
411
412 /* Check if the VID information is requested */
413 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
414 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
415 struct net_bridge_vlan_group *vg;
416 struct nlattr *af;
417 int err;
418
419 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
420 rcu_read_lock();
421 if (port)
422 vg = nbp_vlan_group_rcu(port);
423 else
424 vg = br_vlan_group_rcu(br);
425
426 if (!vg || !vg->num_vlans) {
427 rcu_read_unlock();
428 goto done;
429 }
430 af = nla_nest_start(skb, IFLA_AF_SPEC);
431 if (!af) {
432 rcu_read_unlock();
433 goto nla_put_failure;
434 }
435 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
436 err = br_fill_ifvlaninfo_compressed(skb, vg);
437 else
438 err = br_fill_ifvlaninfo(skb, vg);
439
440 if (port && (port->flags & BR_VLAN_TUNNEL))
441 err = br_fill_vlan_tunnel_info(skb, vg);
442 rcu_read_unlock();
443 if (err)
444 goto nla_put_failure;
445 nla_nest_end(skb, af);
446 }
447
448done:
449 nlmsg_end(skb, nlh);
450 return 0;
451
452nla_put_failure:
453 nlmsg_cancel(skb, nlh);
454 return -EMSGSIZE;
455}
456
457/* Notify listeners of a change in bridge or port information */
458void br_ifinfo_notify(int event, const struct net_bridge *br,
459 const struct net_bridge_port *port)
460{
461 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
462 struct net_device *dev;
463 struct sk_buff *skb;
464 int err = -ENOBUFS;
465 struct net *net;
466 u16 port_no = 0;
467
468 if (WARN_ON(!port && !br))
469 return;
470
471 if (port) {
472 dev = port->dev;
473 br = port->br;
474 port_no = port->port_no;
475 } else {
476 dev = br->dev;
477 }
478
479 net = dev_net(dev);
480 br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
481
482 skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
483 if (skb == NULL)
484 goto errout;
485
486 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev);
487 if (err < 0) {
488 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
489 WARN_ON(err == -EMSGSIZE);
490 kfree_skb(skb);
491 goto errout;
492 }
493 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
494 return;
495errout:
496 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
497}
498
499/*
500 * Dump information about all ports, in response to GETLINK
501 */
502int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
503 struct net_device *dev, u32 filter_mask, int nlflags)
504{
505 struct net_bridge_port *port = br_port_get_rtnl(dev);
506
507 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
508 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
509 return 0;
510
511 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
512 filter_mask, dev);
513}
514
515static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
516 int cmd, struct bridge_vlan_info *vinfo, bool *changed)
517{
518 bool curr_change;
519 int err = 0;
520
521 switch (cmd) {
522 case RTM_SETLINK:
523 if (p) {
524 /* if the MASTER flag is set this will act on the global
525 * per-VLAN entry as well
526 */
527 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
528 &curr_change);
529 } else {
530 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
531 err = br_vlan_add(br, vinfo->vid, vinfo->flags,
532 &curr_change);
533 }
534 if (curr_change)
535 *changed = true;
536 break;
537
538 case RTM_DELLINK:
539 if (p) {
540 if (!nbp_vlan_delete(p, vinfo->vid))
541 *changed = true;
542
543 if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
544 !br_vlan_delete(p->br, vinfo->vid))
545 *changed = true;
546 } else if (!br_vlan_delete(br, vinfo->vid)) {
547 *changed = true;
548 }
549 break;
550 }
551
552 return err;
553}
554
555static int br_process_vlan_info(struct net_bridge *br,
556 struct net_bridge_port *p, int cmd,
557 struct bridge_vlan_info *vinfo_curr,
558 struct bridge_vlan_info **vinfo_last,
559 bool *changed)
560{
561 if (!vinfo_curr->vid || vinfo_curr->vid >= VLAN_VID_MASK)
562 return -EINVAL;
563
564 if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
565 /* check if we are already processing a range */
566 if (*vinfo_last)
567 return -EINVAL;
568 *vinfo_last = vinfo_curr;
569 /* don't allow range of pvids */
570 if ((*vinfo_last)->flags & BRIDGE_VLAN_INFO_PVID)
571 return -EINVAL;
572 return 0;
573 }
574
575 if (*vinfo_last) {
576 struct bridge_vlan_info tmp_vinfo;
577 int v, err;
578
579 if (!(vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END))
580 return -EINVAL;
581
582 if (vinfo_curr->vid <= (*vinfo_last)->vid)
583 return -EINVAL;
584
585 memcpy(&tmp_vinfo, *vinfo_last,
586 sizeof(struct bridge_vlan_info));
587 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
588 tmp_vinfo.vid = v;
589 err = br_vlan_info(br, p, cmd, &tmp_vinfo, changed);
590 if (err)
591 break;
592 }
593 *vinfo_last = NULL;
594
595 return err;
596 }
597
598 return br_vlan_info(br, p, cmd, vinfo_curr, changed);
599}
600
601static int br_afspec(struct net_bridge *br,
602 struct net_bridge_port *p,
603 struct nlattr *af_spec,
604 int cmd, bool *changed)
605{
606 struct bridge_vlan_info *vinfo_curr = NULL;
607 struct bridge_vlan_info *vinfo_last = NULL;
608 struct nlattr *attr;
609 struct vtunnel_info tinfo_last = {};
610 struct vtunnel_info tinfo_curr = {};
611 int err = 0, rem;
612
613 nla_for_each_nested(attr, af_spec, rem) {
614 err = 0;
615 switch (nla_type(attr)) {
616 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
617 if (!p || !(p->flags & BR_VLAN_TUNNEL))
618 return -EINVAL;
619 err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
620 if (err)
621 return err;
622 err = br_process_vlan_tunnel_info(br, p, cmd,
623 &tinfo_curr,
624 &tinfo_last,
625 changed);
626 if (err)
627 return err;
628 break;
629 case IFLA_BRIDGE_VLAN_INFO:
630 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
631 return -EINVAL;
632 vinfo_curr = nla_data(attr);
633 err = br_process_vlan_info(br, p, cmd, vinfo_curr,
634 &vinfo_last, changed);
635 if (err)
636 return err;
637 break;
638 }
639 }
640
641 return err;
642}
643
644static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
645 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
646 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
647 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
648 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
649 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
650 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
651 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
652 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
653 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
654 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
655 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
656 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
657 [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
658 [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
659 [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
660 [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
661 [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
662 [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
663};
664
665/* Change the state of the port and notify spanning tree */
666static int br_set_port_state(struct net_bridge_port *p, u8 state)
667{
668 if (state > BR_STATE_BLOCKING)
669 return -EINVAL;
670
671 /* if kernel STP is running, don't allow changes */
672 if (p->br->stp_enabled == BR_KERNEL_STP)
673 return -EBUSY;
674
675 /* if device is not up, change is not allowed
676 * if link is not present, only allowable state is disabled
677 */
678 if (!netif_running(p->dev) ||
679 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
680 return -ENETDOWN;
681
682 br_set_state(p, state);
683 br_port_state_selection(p->br);
684 return 0;
685}
686
687/* Set/clear or port flags based on attribute */
688static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
689 int attrtype, unsigned long mask)
690{
691 unsigned long flags;
692 int err;
693
694 if (!tb[attrtype])
695 return 0;
696
697 if (nla_get_u8(tb[attrtype]))
698 flags = p->flags | mask;
699 else
700 flags = p->flags & ~mask;
701
702 err = br_switchdev_set_port_flag(p, flags, mask);
703 if (err)
704 return err;
705
706 p->flags = flags;
707 return 0;
708}
709
710/* Process bridge protocol info on port */
711static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
712{
713 unsigned long old_flags = p->flags;
714 bool br_vlan_tunnel_old = false;
715 int err;
716
717 err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
718 if (err)
719 return err;
720
721 err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
722 if (err)
723 return err;
724
725 err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
726 if (err)
727 return err;
728
729 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
730 if (err)
731 return err;
732
733 err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
734 if (err)
735 return err;
736
737 err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
738 if (err)
739 return err;
740
741 err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
742 if (err)
743 return err;
744
745 err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
746 if (err)
747 return err;
748
749 err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
750 if (err)
751 return err;
752
753 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
754 if (err)
755 return err;
756
757 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
758 if (err)
759 return err;
760
761 br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
762 err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
763 if (err)
764 return err;
765
766 if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
767 nbp_vlan_tunnel_info_flush(p);
768
769 if (tb[IFLA_BRPORT_COST]) {
770 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
771 if (err)
772 return err;
773 }
774
775 if (tb[IFLA_BRPORT_PRIORITY]) {
776 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
777 if (err)
778 return err;
779 }
780
781 if (tb[IFLA_BRPORT_STATE]) {
782 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
783 if (err)
784 return err;
785 }
786
787 if (tb[IFLA_BRPORT_FLUSH])
788 br_fdb_delete_by_port(p->br, p, 0, 0);
789
790#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
791 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
792 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
793
794 err = br_multicast_set_port_router(p, mcast_router);
795 if (err)
796 return err;
797 }
798#endif
799
800 if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
801 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
802
803 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
804 return -EINVAL;
805 p->group_fwd_mask = fwd_mask;
806 }
807
808 err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
809 BR_NEIGH_SUPPRESS);
810 if (err)
811 return err;
812
813 br_port_flags_change(p, old_flags ^ p->flags);
814 return 0;
815}
816
817/* Change state and parameters on port. */
818int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
819{
820 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
821 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
822 struct net_bridge_port *p;
823 struct nlattr *protinfo;
824 struct nlattr *afspec;
825 bool changed = false;
826 int err = 0;
827
828 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
829 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
830 if (!protinfo && !afspec)
831 return 0;
832
833 p = br_port_get_rtnl(dev);
834 /* We want to accept dev as bridge itself if the AF_SPEC
835 * is set to see if someone is setting vlan info on the bridge
836 */
837 if (!p && !afspec)
838 return -EINVAL;
839
840 if (p && protinfo) {
841 if (protinfo->nla_type & NLA_F_NESTED) {
842 err = nla_parse_nested(tb, IFLA_BRPORT_MAX, protinfo,
843 br_port_policy, NULL);
844 if (err)
845 return err;
846
847 spin_lock_bh(&p->br->lock);
848 err = br_setport(p, tb);
849 spin_unlock_bh(&p->br->lock);
850 } else {
851 /* Binary compatibility with old RSTP */
852 if (nla_len(protinfo) < sizeof(u8))
853 return -EINVAL;
854
855 spin_lock_bh(&p->br->lock);
856 err = br_set_port_state(p, nla_get_u8(protinfo));
857 spin_unlock_bh(&p->br->lock);
858 }
859 if (err)
860 goto out;
861 changed = true;
862 }
863
864 if (afspec)
865 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed);
866
867 if (changed)
868 br_ifinfo_notify(RTM_NEWLINK, br, p);
869out:
870 return err;
871}
872
873/* Delete port information */
874int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
875{
876 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
877 struct net_bridge_port *p;
878 struct nlattr *afspec;
879 bool changed = false;
880 int err = 0;
881
882 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
883 if (!afspec)
884 return 0;
885
886 p = br_port_get_rtnl(dev);
887 /* We want to accept dev as bridge itself as well */
888 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
889 return -EINVAL;
890
891 err = br_afspec(br, p, afspec, RTM_DELLINK, &changed);
892 if (changed)
893 /* Send RTM_NEWLINK because userspace
894 * expects RTM_NEWLINK for vlan dels
895 */
896 br_ifinfo_notify(RTM_NEWLINK, br, p);
897
898 return err;
899}
900
901static int br_validate(struct nlattr *tb[], struct nlattr *data[],
902 struct netlink_ext_ack *extack)
903{
904 if (tb[IFLA_ADDRESS]) {
905 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
906 return -EINVAL;
907 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
908 return -EADDRNOTAVAIL;
909 }
910
911 if (!data)
912 return 0;
913
914#ifdef CONFIG_BRIDGE_VLAN_FILTERING
915 if (data[IFLA_BR_VLAN_PROTOCOL]) {
916 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
917 case htons(ETH_P_8021Q):
918 case htons(ETH_P_8021AD):
919 break;
920 default:
921 return -EPROTONOSUPPORT;
922 }
923 }
924
925 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
926 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
927
928 if (defpvid >= VLAN_VID_MASK)
929 return -EINVAL;
930 }
931#endif
932
933 return 0;
934}
935
936static int br_port_slave_changelink(struct net_device *brdev,
937 struct net_device *dev,
938 struct nlattr *tb[],
939 struct nlattr *data[],
940 struct netlink_ext_ack *extack)
941{
942 struct net_bridge *br = netdev_priv(brdev);
943 int ret;
944
945 if (!data)
946 return 0;
947
948 spin_lock_bh(&br->lock);
949 ret = br_setport(br_port_get_rtnl(dev), data);
950 spin_unlock_bh(&br->lock);
951
952 return ret;
953}
954
955static int br_port_fill_slave_info(struct sk_buff *skb,
956 const struct net_device *brdev,
957 const struct net_device *dev)
958{
959 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
960}
961
962static size_t br_port_get_slave_size(const struct net_device *brdev,
963 const struct net_device *dev)
964{
965 return br_port_info_size();
966}
967
968static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
969 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
970 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
971 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
972 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
973 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
974 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
975 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
976 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
977 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
978 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
979 .len = ETH_ALEN },
980 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
981 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
982 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
983 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
984 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
985 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
986 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
987 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
988 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
989 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
990 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
991 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
992 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
993 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
994 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
995 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
996 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
997 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
998 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
999 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1000 [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1001 [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1002};
1003
1004static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1005 struct nlattr *data[],
1006 struct netlink_ext_ack *extack)
1007{
1008 struct net_bridge *br = netdev_priv(brdev);
1009 int err;
1010
1011 if (!data)
1012 return 0;
1013
1014 if (data[IFLA_BR_FORWARD_DELAY]) {
1015 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1016 if (err)
1017 return err;
1018 }
1019
1020 if (data[IFLA_BR_HELLO_TIME]) {
1021 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1022 if (err)
1023 return err;
1024 }
1025
1026 if (data[IFLA_BR_MAX_AGE]) {
1027 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1028 if (err)
1029 return err;
1030 }
1031
1032 if (data[IFLA_BR_AGEING_TIME]) {
1033 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1034 if (err)
1035 return err;
1036 }
1037
1038 if (data[IFLA_BR_STP_STATE]) {
1039 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1040
1041 br_stp_set_enabled(br, stp_enabled);
1042 }
1043
1044 if (data[IFLA_BR_PRIORITY]) {
1045 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1046
1047 br_stp_set_bridge_priority(br, priority);
1048 }
1049
1050 if (data[IFLA_BR_VLAN_FILTERING]) {
1051 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1052
1053 err = __br_vlan_filter_toggle(br, vlan_filter);
1054 if (err)
1055 return err;
1056 }
1057
1058#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1059 if (data[IFLA_BR_VLAN_PROTOCOL]) {
1060 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1061
1062 err = __br_vlan_set_proto(br, vlan_proto);
1063 if (err)
1064 return err;
1065 }
1066
1067 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1068 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1069
1070 err = __br_vlan_set_default_pvid(br, defpvid);
1071 if (err)
1072 return err;
1073 }
1074
1075 if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1076 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1077
1078 err = br_vlan_set_stats(br, vlan_stats);
1079 if (err)
1080 return err;
1081 }
1082#endif
1083
1084 if (data[IFLA_BR_GROUP_FWD_MASK]) {
1085 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1086
1087 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1088 return -EINVAL;
1089 br->group_fwd_mask = fwd_mask;
1090 }
1091
1092 if (data[IFLA_BR_GROUP_ADDR]) {
1093 u8 new_addr[ETH_ALEN];
1094
1095 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1096 return -EINVAL;
1097 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1098 if (!is_link_local_ether_addr(new_addr))
1099 return -EINVAL;
1100 if (new_addr[5] == 1 || /* 802.3x Pause address */
1101 new_addr[5] == 2 || /* 802.3ad Slow protocols */
1102 new_addr[5] == 3) /* 802.1X PAE address */
1103 return -EINVAL;
1104 spin_lock_bh(&br->lock);
1105 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1106 spin_unlock_bh(&br->lock);
1107 br->group_addr_set = true;
1108 br_recalculate_fwd_mask(br);
1109 }
1110
1111 if (data[IFLA_BR_FDB_FLUSH])
1112 br_fdb_flush(br);
1113
1114#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1115 if (data[IFLA_BR_MCAST_ROUTER]) {
1116 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1117
1118 err = br_multicast_set_router(br, multicast_router);
1119 if (err)
1120 return err;
1121 }
1122
1123 if (data[IFLA_BR_MCAST_SNOOPING]) {
1124 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1125
1126 err = br_multicast_toggle(br, mcast_snooping);
1127 if (err)
1128 return err;
1129 }
1130
1131 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1132 u8 val;
1133
1134 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1135 br->multicast_query_use_ifaddr = !!val;
1136 }
1137
1138 if (data[IFLA_BR_MCAST_QUERIER]) {
1139 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1140
1141 err = br_multicast_set_querier(br, mcast_querier);
1142 if (err)
1143 return err;
1144 }
1145
1146 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
1147 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
1148
1149 br->hash_elasticity = val;
1150 }
1151
1152 if (data[IFLA_BR_MCAST_HASH_MAX]) {
1153 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1154
1155 err = br_multicast_set_hash_max(br, hash_max);
1156 if (err)
1157 return err;
1158 }
1159
1160 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1161 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1162
1163 br->multicast_last_member_count = val;
1164 }
1165
1166 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1167 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1168
1169 br->multicast_startup_query_count = val;
1170 }
1171
1172 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1173 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1174
1175 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1176 }
1177
1178 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1179 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1180
1181 br->multicast_membership_interval = clock_t_to_jiffies(val);
1182 }
1183
1184 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1185 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1186
1187 br->multicast_querier_interval = clock_t_to_jiffies(val);
1188 }
1189
1190 if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1191 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1192
1193 br->multicast_query_interval = clock_t_to_jiffies(val);
1194 }
1195
1196 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1197 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1198
1199 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1200 }
1201
1202 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1203 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1204
1205 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1206 }
1207
1208 if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1209 __u8 mcast_stats;
1210
1211 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1212 br->multicast_stats_enabled = !!mcast_stats;
1213 }
1214
1215 if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1216 __u8 igmp_version;
1217
1218 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1219 err = br_multicast_set_igmp_version(br, igmp_version);
1220 if (err)
1221 return err;
1222 }
1223
1224#if IS_ENABLED(CONFIG_IPV6)
1225 if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1226 __u8 mld_version;
1227
1228 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1229 err = br_multicast_set_mld_version(br, mld_version);
1230 if (err)
1231 return err;
1232 }
1233#endif
1234#endif
1235#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1236 if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1237 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1238
1239 br->nf_call_iptables = val ? true : false;
1240 }
1241
1242 if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1243 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1244
1245 br->nf_call_ip6tables = val ? true : false;
1246 }
1247
1248 if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1249 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1250
1251 br->nf_call_arptables = val ? true : false;
1252 }
1253#endif
1254
1255 return 0;
1256}
1257
1258static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1259 struct nlattr *tb[], struct nlattr *data[],
1260 struct netlink_ext_ack *extack)
1261{
1262 struct net_bridge *br = netdev_priv(dev);
1263 int err;
1264
1265 err = register_netdevice(dev);
1266 if (err)
1267 return err;
1268
1269 if (tb[IFLA_ADDRESS]) {
1270 spin_lock_bh(&br->lock);
1271 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1272 spin_unlock_bh(&br->lock);
1273 }
1274
1275 err = br_changelink(dev, tb, data, extack);
1276 if (err)
1277 br_dev_delete(dev, NULL);
1278
1279 return err;
1280}
1281
1282static size_t br_get_size(const struct net_device *brdev)
1283{
1284 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
1285 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
1286 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
1287 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
1288 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
1289 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
1290 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
1291#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1292 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1293 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */
1294 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */
1295#endif
1296 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
1297 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */
1298 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */
1299 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */
1300 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */
1301 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */
1302 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1303 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1304 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1305 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1306 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1307 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
1308#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1309 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */
1310 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */
1311 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1312 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */
1313 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */
1314 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */
1315 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */
1316 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1317 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1318 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1319 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1320 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1321 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1322 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1323 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1324 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */
1325 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */
1326#endif
1327#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1328 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */
1329 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */
1330 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */
1331#endif
1332 0;
1333}
1334
1335static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1336{
1337 struct net_bridge *br = netdev_priv(brdev);
1338 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1339 u32 hello_time = jiffies_to_clock_t(br->hello_time);
1340 u32 age_time = jiffies_to_clock_t(br->max_age);
1341 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1342 u32 stp_enabled = br->stp_enabled;
1343 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1344 u8 vlan_enabled = br_vlan_enabled(br->dev);
1345 u64 clockval;
1346
1347 clockval = br_timer_value(&br->hello_timer);
1348 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1349 return -EMSGSIZE;
1350 clockval = br_timer_value(&br->tcn_timer);
1351 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1352 return -EMSGSIZE;
1353 clockval = br_timer_value(&br->topology_change_timer);
1354 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1355 IFLA_BR_PAD))
1356 return -EMSGSIZE;
1357 clockval = br_timer_value(&br->gc_work.timer);
1358 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1359 return -EMSGSIZE;
1360
1361 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1362 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1363 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1364 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1365 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1366 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1367 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1368 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1369 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1370 &br->bridge_id) ||
1371 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1372 &br->designated_root) ||
1373 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1374 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1375 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1376 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1377 br->topology_change_detected) ||
1378 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1379 return -EMSGSIZE;
1380
1381#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1382 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1383 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1384 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled))
1385 return -EMSGSIZE;
1386#endif
1387#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1388 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1389 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1390 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1391 br->multicast_query_use_ifaddr) ||
1392 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1393 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1394 br->multicast_stats_enabled) ||
1395 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1396 br->hash_elasticity) ||
1397 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1398 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1399 br->multicast_last_member_count) ||
1400 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1401 br->multicast_startup_query_count) ||
1402 nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1403 br->multicast_igmp_version))
1404 return -EMSGSIZE;
1405#if IS_ENABLED(CONFIG_IPV6)
1406 if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1407 br->multicast_mld_version))
1408 return -EMSGSIZE;
1409#endif
1410 clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1411 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1412 IFLA_BR_PAD))
1413 return -EMSGSIZE;
1414 clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1415 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1416 IFLA_BR_PAD))
1417 return -EMSGSIZE;
1418 clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1419 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1420 IFLA_BR_PAD))
1421 return -EMSGSIZE;
1422 clockval = jiffies_to_clock_t(br->multicast_query_interval);
1423 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1424 IFLA_BR_PAD))
1425 return -EMSGSIZE;
1426 clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1427 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1428 IFLA_BR_PAD))
1429 return -EMSGSIZE;
1430 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1431 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1432 IFLA_BR_PAD))
1433 return -EMSGSIZE;
1434#endif
1435#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1436 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1437 br->nf_call_iptables ? 1 : 0) ||
1438 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1439 br->nf_call_ip6tables ? 1 : 0) ||
1440 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1441 br->nf_call_arptables ? 1 : 0))
1442 return -EMSGSIZE;
1443#endif
1444
1445 return 0;
1446}
1447
1448static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1449{
1450 struct net_bridge_port *p = NULL;
1451 struct net_bridge_vlan_group *vg;
1452 struct net_bridge_vlan *v;
1453 struct net_bridge *br;
1454 int numvls = 0;
1455
1456 switch (attr) {
1457 case IFLA_STATS_LINK_XSTATS:
1458 br = netdev_priv(dev);
1459 vg = br_vlan_group(br);
1460 break;
1461 case IFLA_STATS_LINK_XSTATS_SLAVE:
1462 p = br_port_get_rtnl(dev);
1463 if (!p)
1464 return 0;
1465 br = p->br;
1466 vg = nbp_vlan_group(p);
1467 break;
1468 default:
1469 return 0;
1470 }
1471
1472 if (vg) {
1473 /* we need to count all, even placeholder entries */
1474 list_for_each_entry(v, &vg->vlan_list, vlist)
1475 numvls++;
1476 }
1477
1478 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1479 nla_total_size(sizeof(struct br_mcast_stats)) +
1480 nla_total_size(0);
1481}
1482
1483static int br_fill_linkxstats(struct sk_buff *skb,
1484 const struct net_device *dev,
1485 int *prividx, int attr)
1486{
1487 struct nlattr *nla __maybe_unused;
1488 struct net_bridge_port *p = NULL;
1489 struct net_bridge_vlan_group *vg;
1490 struct net_bridge_vlan *v;
1491 struct net_bridge *br;
1492 struct nlattr *nest;
1493 int vl_idx = 0;
1494
1495 switch (attr) {
1496 case IFLA_STATS_LINK_XSTATS:
1497 br = netdev_priv(dev);
1498 vg = br_vlan_group(br);
1499 break;
1500 case IFLA_STATS_LINK_XSTATS_SLAVE:
1501 p = br_port_get_rtnl(dev);
1502 if (!p)
1503 return 0;
1504 br = p->br;
1505 vg = nbp_vlan_group(p);
1506 break;
1507 default:
1508 return -EINVAL;
1509 }
1510
1511 nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE);
1512 if (!nest)
1513 return -EMSGSIZE;
1514
1515 if (vg) {
1516 u16 pvid;
1517
1518 pvid = br_get_pvid(vg);
1519 list_for_each_entry(v, &vg->vlan_list, vlist) {
1520 struct bridge_vlan_xstats vxi;
1521 struct br_vlan_stats stats;
1522
1523 if (++vl_idx < *prividx)
1524 continue;
1525 memset(&vxi, 0, sizeof(vxi));
1526 vxi.vid = v->vid;
1527 vxi.flags = v->flags;
1528 if (v->vid == pvid)
1529 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1530 br_vlan_get_stats(v, &stats);
1531 vxi.rx_bytes = stats.rx_bytes;
1532 vxi.rx_packets = stats.rx_packets;
1533 vxi.tx_bytes = stats.tx_bytes;
1534 vxi.tx_packets = stats.tx_packets;
1535
1536 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1537 goto nla_put_failure;
1538 }
1539 }
1540
1541#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1542 if (++vl_idx >= *prividx) {
1543 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1544 sizeof(struct br_mcast_stats),
1545 BRIDGE_XSTATS_PAD);
1546 if (!nla)
1547 goto nla_put_failure;
1548 br_multicast_get_stats(br, p, nla_data(nla));
1549 }
1550#endif
1551 nla_nest_end(skb, nest);
1552 *prividx = 0;
1553
1554 return 0;
1555
1556nla_put_failure:
1557 nla_nest_end(skb, nest);
1558 *prividx = vl_idx;
1559
1560 return -EMSGSIZE;
1561}
1562
1563static struct rtnl_af_ops br_af_ops __read_mostly = {
1564 .family = AF_BRIDGE,
1565 .get_link_af_size = br_get_link_af_size_filtered,
1566};
1567
1568struct rtnl_link_ops br_link_ops __read_mostly = {
1569 .kind = "bridge",
1570 .priv_size = sizeof(struct net_bridge),
1571 .setup = br_dev_setup,
1572 .maxtype = IFLA_BR_MAX,
1573 .policy = br_policy,
1574 .validate = br_validate,
1575 .newlink = br_dev_newlink,
1576 .changelink = br_changelink,
1577 .dellink = br_dev_delete,
1578 .get_size = br_get_size,
1579 .fill_info = br_fill_info,
1580 .fill_linkxstats = br_fill_linkxstats,
1581 .get_linkxstats_size = br_get_linkxstats_size,
1582
1583 .slave_maxtype = IFLA_BRPORT_MAX,
1584 .slave_policy = br_port_policy,
1585 .slave_changelink = br_port_slave_changelink,
1586 .get_slave_size = br_port_get_slave_size,
1587 .fill_slave_info = br_port_fill_slave_info,
1588};
1589
1590int __init br_netlink_init(void)
1591{
1592 int err;
1593
1594 br_mdb_init();
1595 rtnl_af_register(&br_af_ops);
1596
1597 err = rtnl_link_register(&br_link_ops);
1598 if (err)
1599 goto out_af;
1600
1601 return 0;
1602
1603out_af:
1604 rtnl_af_unregister(&br_af_ops);
1605 br_mdb_uninit();
1606 return err;
1607}
1608
1609void br_netlink_fini(void)
1610{
1611 br_mdb_uninit();
1612 rtnl_af_unregister(&br_af_ops);
1613 rtnl_link_unregister(&br_link_ops);
1614}