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Merge remote-tracking branch 'regulator/fix/max77802' into regulator-linus
[mirror_ubuntu-artful-kernel.git] / net / bridge / br_netlink.c
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
25 static 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 }
61 initvars:
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
77 static 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
95 static 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
124 static 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(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
142 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
143 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */
144 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */
145 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */
146 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */
147 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
148 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */
149 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
150 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
151 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
152 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
153 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */
154 #endif
155 + 0;
156 }
157
158 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
159 {
160 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
161 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
162 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
163 + nla_total_size(4) /* IFLA_MASTER */
164 + nla_total_size(4) /* IFLA_MTU */
165 + nla_total_size(4) /* IFLA_LINK */
166 + nla_total_size(1) /* IFLA_OPERSTATE */
167 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
168 + nla_total_size(br_get_link_af_size_filtered(dev,
169 filter_mask)); /* IFLA_AF_SPEC */
170 }
171
172 static int br_port_fill_attrs(struct sk_buff *skb,
173 const struct net_bridge_port *p)
174 {
175 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
176 u64 timerval;
177
178 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
179 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
180 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
181 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
182 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
183 nla_put_u8(skb, IFLA_BRPORT_PROTECT,
184 !!(p->flags & BR_ROOT_BLOCK)) ||
185 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
186 !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
187 nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
188 !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
189 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
190 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
191 !!(p->flags & BR_FLOOD)) ||
192 nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
193 !!(p->flags & BR_MCAST_FLOOD)) ||
194 nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
195 !!(p->flags & BR_BCAST_FLOOD)) ||
196 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
197 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
198 !!(p->flags & BR_PROXYARP_WIFI)) ||
199 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
200 &p->designated_root) ||
201 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
202 &p->designated_bridge) ||
203 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
204 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
205 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
206 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
207 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
208 p->topology_change_ack) ||
209 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
210 nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
211 BR_VLAN_TUNNEL)))
212 return -EMSGSIZE;
213
214 timerval = br_timer_value(&p->message_age_timer);
215 if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
216 IFLA_BRPORT_PAD))
217 return -EMSGSIZE;
218 timerval = br_timer_value(&p->forward_delay_timer);
219 if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
220 IFLA_BRPORT_PAD))
221 return -EMSGSIZE;
222 timerval = br_timer_value(&p->hold_timer);
223 if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
224 IFLA_BRPORT_PAD))
225 return -EMSGSIZE;
226
227 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
228 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
229 p->multicast_router))
230 return -EMSGSIZE;
231 #endif
232
233 return 0;
234 }
235
236 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
237 u16 vid_end, u16 flags)
238 {
239 struct bridge_vlan_info vinfo;
240
241 if ((vid_end - vid_start) > 0) {
242 /* add range to skb */
243 vinfo.vid = vid_start;
244 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
245 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
246 sizeof(vinfo), &vinfo))
247 goto nla_put_failure;
248
249 vinfo.vid = vid_end;
250 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
251 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
252 sizeof(vinfo), &vinfo))
253 goto nla_put_failure;
254 } else {
255 vinfo.vid = vid_start;
256 vinfo.flags = flags;
257 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
258 sizeof(vinfo), &vinfo))
259 goto nla_put_failure;
260 }
261
262 return 0;
263
264 nla_put_failure:
265 return -EMSGSIZE;
266 }
267
268 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
269 struct net_bridge_vlan_group *vg)
270 {
271 struct net_bridge_vlan *v;
272 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
273 u16 flags, pvid;
274 int err = 0;
275
276 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
277 * and mark vlan info with begin and end flags
278 * if vlaninfo represents a range
279 */
280 pvid = br_get_pvid(vg);
281 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
282 flags = 0;
283 if (!br_vlan_should_use(v))
284 continue;
285 if (v->vid == pvid)
286 flags |= BRIDGE_VLAN_INFO_PVID;
287
288 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
289 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
290
291 if (vid_range_start == 0) {
292 goto initvars;
293 } else if ((v->vid - vid_range_end) == 1 &&
294 flags == vid_range_flags) {
295 vid_range_end = v->vid;
296 continue;
297 } else {
298 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
299 vid_range_end,
300 vid_range_flags);
301 if (err)
302 return err;
303 }
304
305 initvars:
306 vid_range_start = v->vid;
307 vid_range_end = v->vid;
308 vid_range_flags = flags;
309 }
310
311 if (vid_range_start != 0) {
312 /* Call it once more to send any left over vlans */
313 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
314 vid_range_end,
315 vid_range_flags);
316 if (err)
317 return err;
318 }
319
320 return 0;
321 }
322
323 static int br_fill_ifvlaninfo(struct sk_buff *skb,
324 struct net_bridge_vlan_group *vg)
325 {
326 struct bridge_vlan_info vinfo;
327 struct net_bridge_vlan *v;
328 u16 pvid;
329
330 pvid = br_get_pvid(vg);
331 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
332 if (!br_vlan_should_use(v))
333 continue;
334
335 vinfo.vid = v->vid;
336 vinfo.flags = 0;
337 if (v->vid == pvid)
338 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
339
340 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
341 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
342
343 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
344 sizeof(vinfo), &vinfo))
345 goto nla_put_failure;
346 }
347
348 return 0;
349
350 nla_put_failure:
351 return -EMSGSIZE;
352 }
353
354 /*
355 * Create one netlink message for one interface
356 * Contains port and master info as well as carrier and bridge state.
357 */
358 static int br_fill_ifinfo(struct sk_buff *skb,
359 struct net_bridge_port *port,
360 u32 pid, u32 seq, int event, unsigned int flags,
361 u32 filter_mask, const struct net_device *dev)
362 {
363 struct net_bridge *br;
364 struct ifinfomsg *hdr;
365 struct nlmsghdr *nlh;
366 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
367
368 if (port)
369 br = port->br;
370 else
371 br = netdev_priv(dev);
372
373 br_debug(br, "br_fill_info event %d port %s master %s\n",
374 event, dev->name, br->dev->name);
375
376 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
377 if (nlh == NULL)
378 return -EMSGSIZE;
379
380 hdr = nlmsg_data(nlh);
381 hdr->ifi_family = AF_BRIDGE;
382 hdr->__ifi_pad = 0;
383 hdr->ifi_type = dev->type;
384 hdr->ifi_index = dev->ifindex;
385 hdr->ifi_flags = dev_get_flags(dev);
386 hdr->ifi_change = 0;
387
388 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
389 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
390 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
391 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
392 (dev->addr_len &&
393 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
394 (dev->ifindex != dev_get_iflink(dev) &&
395 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
396 goto nla_put_failure;
397
398 if (event == RTM_NEWLINK && port) {
399 struct nlattr *nest
400 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
401
402 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
403 goto nla_put_failure;
404 nla_nest_end(skb, nest);
405 }
406
407 /* Check if the VID information is requested */
408 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
409 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
410 struct net_bridge_vlan_group *vg;
411 struct nlattr *af;
412 int err;
413
414 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
415 rcu_read_lock();
416 if (port)
417 vg = nbp_vlan_group_rcu(port);
418 else
419 vg = br_vlan_group_rcu(br);
420
421 if (!vg || !vg->num_vlans) {
422 rcu_read_unlock();
423 goto done;
424 }
425 af = nla_nest_start(skb, IFLA_AF_SPEC);
426 if (!af) {
427 rcu_read_unlock();
428 goto nla_put_failure;
429 }
430 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
431 err = br_fill_ifvlaninfo_compressed(skb, vg);
432 else
433 err = br_fill_ifvlaninfo(skb, vg);
434
435 if (port && (port->flags & BR_VLAN_TUNNEL))
436 err = br_fill_vlan_tunnel_info(skb, vg);
437 rcu_read_unlock();
438 if (err)
439 goto nla_put_failure;
440 nla_nest_end(skb, af);
441 }
442
443 done:
444 nlmsg_end(skb, nlh);
445 return 0;
446
447 nla_put_failure:
448 nlmsg_cancel(skb, nlh);
449 return -EMSGSIZE;
450 }
451
452 /*
453 * Notify listeners of a change in port information
454 */
455 void br_ifinfo_notify(int event, struct net_bridge_port *port)
456 {
457 struct net *net;
458 struct sk_buff *skb;
459 int err = -ENOBUFS;
460 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
461
462 if (!port)
463 return;
464
465 net = dev_net(port->dev);
466 br_debug(port->br, "port %u(%s) event %d\n",
467 (unsigned int)port->port_no, port->dev->name, event);
468
469 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
470 if (skb == NULL)
471 goto errout;
472
473 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
474 if (err < 0) {
475 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
476 WARN_ON(err == -EMSGSIZE);
477 kfree_skb(skb);
478 goto errout;
479 }
480 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
481 return;
482 errout:
483 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
484 }
485
486
487 /*
488 * Dump information about all ports, in response to GETLINK
489 */
490 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
491 struct net_device *dev, u32 filter_mask, int nlflags)
492 {
493 struct net_bridge_port *port = br_port_get_rtnl(dev);
494
495 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
496 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
497 return 0;
498
499 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
500 filter_mask, dev);
501 }
502
503 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
504 int cmd, struct bridge_vlan_info *vinfo)
505 {
506 int err = 0;
507
508 switch (cmd) {
509 case RTM_SETLINK:
510 if (p) {
511 /* if the MASTER flag is set this will act on the global
512 * per-VLAN entry as well
513 */
514 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
515 if (err)
516 break;
517 } else {
518 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
519 err = br_vlan_add(br, vinfo->vid, vinfo->flags);
520 }
521 break;
522
523 case RTM_DELLINK:
524 if (p) {
525 nbp_vlan_delete(p, vinfo->vid);
526 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
527 br_vlan_delete(p->br, vinfo->vid);
528 } else {
529 br_vlan_delete(br, vinfo->vid);
530 }
531 break;
532 }
533
534 return err;
535 }
536
537 static int br_process_vlan_info(struct net_bridge *br,
538 struct net_bridge_port *p, int cmd,
539 struct bridge_vlan_info *vinfo_curr,
540 struct bridge_vlan_info **vinfo_last)
541 {
542 if (!vinfo_curr->vid || vinfo_curr->vid >= VLAN_VID_MASK)
543 return -EINVAL;
544
545 if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
546 /* check if we are already processing a range */
547 if (*vinfo_last)
548 return -EINVAL;
549 *vinfo_last = vinfo_curr;
550 /* don't allow range of pvids */
551 if ((*vinfo_last)->flags & BRIDGE_VLAN_INFO_PVID)
552 return -EINVAL;
553 return 0;
554 }
555
556 if (*vinfo_last) {
557 struct bridge_vlan_info tmp_vinfo;
558 int v, err;
559
560 if (!(vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END))
561 return -EINVAL;
562
563 if (vinfo_curr->vid <= (*vinfo_last)->vid)
564 return -EINVAL;
565
566 memcpy(&tmp_vinfo, *vinfo_last,
567 sizeof(struct bridge_vlan_info));
568 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
569 tmp_vinfo.vid = v;
570 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
571 if (err)
572 break;
573 }
574 *vinfo_last = NULL;
575
576 return 0;
577 }
578
579 return br_vlan_info(br, p, cmd, vinfo_curr);
580 }
581
582 static int br_afspec(struct net_bridge *br,
583 struct net_bridge_port *p,
584 struct nlattr *af_spec,
585 int cmd)
586 {
587 struct bridge_vlan_info *vinfo_curr = NULL;
588 struct bridge_vlan_info *vinfo_last = NULL;
589 struct nlattr *attr;
590 struct vtunnel_info tinfo_last = {};
591 struct vtunnel_info tinfo_curr = {};
592 int err = 0, rem;
593
594 nla_for_each_nested(attr, af_spec, rem) {
595 err = 0;
596 switch (nla_type(attr)) {
597 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
598 if (!p || !(p->flags & BR_VLAN_TUNNEL))
599 return -EINVAL;
600 err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
601 if (err)
602 return err;
603 err = br_process_vlan_tunnel_info(br, p, cmd,
604 &tinfo_curr,
605 &tinfo_last);
606 if (err)
607 return err;
608 break;
609 case IFLA_BRIDGE_VLAN_INFO:
610 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
611 return -EINVAL;
612 vinfo_curr = nla_data(attr);
613 err = br_process_vlan_info(br, p, cmd, vinfo_curr,
614 &vinfo_last);
615 if (err)
616 return err;
617 break;
618 }
619 }
620
621 return err;
622 }
623
624 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
625 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
626 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
627 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
628 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
629 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
630 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
631 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
632 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
633 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
634 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
635 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
636 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
637 [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
638 [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
639 [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
640 };
641
642 /* Change the state of the port and notify spanning tree */
643 static int br_set_port_state(struct net_bridge_port *p, u8 state)
644 {
645 if (state > BR_STATE_BLOCKING)
646 return -EINVAL;
647
648 /* if kernel STP is running, don't allow changes */
649 if (p->br->stp_enabled == BR_KERNEL_STP)
650 return -EBUSY;
651
652 /* if device is not up, change is not allowed
653 * if link is not present, only allowable state is disabled
654 */
655 if (!netif_running(p->dev) ||
656 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
657 return -ENETDOWN;
658
659 br_set_state(p, state);
660 br_port_state_selection(p->br);
661 return 0;
662 }
663
664 /* Set/clear or port flags based on attribute */
665 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
666 int attrtype, unsigned long mask)
667 {
668 if (tb[attrtype]) {
669 u8 flag = nla_get_u8(tb[attrtype]);
670 if (flag)
671 p->flags |= mask;
672 else
673 p->flags &= ~mask;
674 }
675 }
676
677 /* Process bridge protocol info on port */
678 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
679 {
680 unsigned long old_flags = p->flags;
681 bool br_vlan_tunnel_old = false;
682 int err;
683
684 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
685 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
686 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
687 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
688 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
689 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
690 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
691 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
692 br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
693 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
694 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
695
696 br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
697 br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
698 if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
699 nbp_vlan_tunnel_info_flush(p);
700
701 if (tb[IFLA_BRPORT_COST]) {
702 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
703 if (err)
704 return err;
705 }
706
707 if (tb[IFLA_BRPORT_PRIORITY]) {
708 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
709 if (err)
710 return err;
711 }
712
713 if (tb[IFLA_BRPORT_STATE]) {
714 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
715 if (err)
716 return err;
717 }
718
719 if (tb[IFLA_BRPORT_FLUSH])
720 br_fdb_delete_by_port(p->br, p, 0, 0);
721
722 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
723 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
724 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
725
726 err = br_multicast_set_port_router(p, mcast_router);
727 if (err)
728 return err;
729 }
730 #endif
731 br_port_flags_change(p, old_flags ^ p->flags);
732 return 0;
733 }
734
735 /* Change state and parameters on port. */
736 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
737 {
738 struct nlattr *protinfo;
739 struct nlattr *afspec;
740 struct net_bridge_port *p;
741 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
742 int err = 0;
743
744 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
745 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
746 if (!protinfo && !afspec)
747 return 0;
748
749 p = br_port_get_rtnl(dev);
750 /* We want to accept dev as bridge itself if the AF_SPEC
751 * is set to see if someone is setting vlan info on the bridge
752 */
753 if (!p && !afspec)
754 return -EINVAL;
755
756 if (p && protinfo) {
757 if (protinfo->nla_type & NLA_F_NESTED) {
758 err = nla_parse_nested(tb, IFLA_BRPORT_MAX, protinfo,
759 br_port_policy, NULL);
760 if (err)
761 return err;
762
763 spin_lock_bh(&p->br->lock);
764 err = br_setport(p, tb);
765 spin_unlock_bh(&p->br->lock);
766 } else {
767 /* Binary compatibility with old RSTP */
768 if (nla_len(protinfo) < sizeof(u8))
769 return -EINVAL;
770
771 spin_lock_bh(&p->br->lock);
772 err = br_set_port_state(p, nla_get_u8(protinfo));
773 spin_unlock_bh(&p->br->lock);
774 }
775 if (err)
776 goto out;
777 }
778
779 if (afspec) {
780 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
781 afspec, RTM_SETLINK);
782 }
783
784 if (err == 0)
785 br_ifinfo_notify(RTM_NEWLINK, p);
786 out:
787 return err;
788 }
789
790 /* Delete port information */
791 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
792 {
793 struct nlattr *afspec;
794 struct net_bridge_port *p;
795 int err = 0;
796
797 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
798 if (!afspec)
799 return 0;
800
801 p = br_port_get_rtnl(dev);
802 /* We want to accept dev as bridge itself as well */
803 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
804 return -EINVAL;
805
806 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
807 afspec, RTM_DELLINK);
808 if (err == 0)
809 /* Send RTM_NEWLINK because userspace
810 * expects RTM_NEWLINK for vlan dels
811 */
812 br_ifinfo_notify(RTM_NEWLINK, p);
813
814 return err;
815 }
816 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
817 {
818 if (tb[IFLA_ADDRESS]) {
819 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
820 return -EINVAL;
821 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
822 return -EADDRNOTAVAIL;
823 }
824
825 if (!data)
826 return 0;
827
828 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
829 if (data[IFLA_BR_VLAN_PROTOCOL]) {
830 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
831 case htons(ETH_P_8021Q):
832 case htons(ETH_P_8021AD):
833 break;
834 default:
835 return -EPROTONOSUPPORT;
836 }
837 }
838
839 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
840 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
841
842 if (defpvid >= VLAN_VID_MASK)
843 return -EINVAL;
844 }
845 #endif
846
847 return 0;
848 }
849
850 static int br_port_slave_changelink(struct net_device *brdev,
851 struct net_device *dev,
852 struct nlattr *tb[],
853 struct nlattr *data[])
854 {
855 struct net_bridge *br = netdev_priv(brdev);
856 int ret;
857
858 if (!data)
859 return 0;
860
861 spin_lock_bh(&br->lock);
862 ret = br_setport(br_port_get_rtnl(dev), data);
863 spin_unlock_bh(&br->lock);
864
865 return ret;
866 }
867
868 static int br_port_fill_slave_info(struct sk_buff *skb,
869 const struct net_device *brdev,
870 const struct net_device *dev)
871 {
872 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
873 }
874
875 static size_t br_port_get_slave_size(const struct net_device *brdev,
876 const struct net_device *dev)
877 {
878 return br_port_info_size();
879 }
880
881 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
882 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
883 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
884 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
885 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
886 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
887 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
888 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
889 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
890 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
891 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
892 .len = ETH_ALEN },
893 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
894 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
895 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
896 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
897 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
898 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
899 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
900 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
901 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
902 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
903 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
904 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
905 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
906 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
907 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
908 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
909 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
910 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
911 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
912 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
913 [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
914 [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
915 };
916
917 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
918 struct nlattr *data[])
919 {
920 struct net_bridge *br = netdev_priv(brdev);
921 int err;
922
923 if (!data)
924 return 0;
925
926 if (data[IFLA_BR_FORWARD_DELAY]) {
927 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
928 if (err)
929 return err;
930 }
931
932 if (data[IFLA_BR_HELLO_TIME]) {
933 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
934 if (err)
935 return err;
936 }
937
938 if (data[IFLA_BR_MAX_AGE]) {
939 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
940 if (err)
941 return err;
942 }
943
944 if (data[IFLA_BR_AGEING_TIME]) {
945 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
946 if (err)
947 return err;
948 }
949
950 if (data[IFLA_BR_STP_STATE]) {
951 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
952
953 br_stp_set_enabled(br, stp_enabled);
954 }
955
956 if (data[IFLA_BR_PRIORITY]) {
957 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
958
959 br_stp_set_bridge_priority(br, priority);
960 }
961
962 if (data[IFLA_BR_VLAN_FILTERING]) {
963 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
964
965 err = __br_vlan_filter_toggle(br, vlan_filter);
966 if (err)
967 return err;
968 }
969
970 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
971 if (data[IFLA_BR_VLAN_PROTOCOL]) {
972 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
973
974 err = __br_vlan_set_proto(br, vlan_proto);
975 if (err)
976 return err;
977 }
978
979 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
980 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
981
982 err = __br_vlan_set_default_pvid(br, defpvid);
983 if (err)
984 return err;
985 }
986
987 if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
988 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
989
990 err = br_vlan_set_stats(br, vlan_stats);
991 if (err)
992 return err;
993 }
994 #endif
995
996 if (data[IFLA_BR_GROUP_FWD_MASK]) {
997 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
998
999 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1000 return -EINVAL;
1001 br->group_fwd_mask = fwd_mask;
1002 }
1003
1004 if (data[IFLA_BR_GROUP_ADDR]) {
1005 u8 new_addr[ETH_ALEN];
1006
1007 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1008 return -EINVAL;
1009 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1010 if (!is_link_local_ether_addr(new_addr))
1011 return -EINVAL;
1012 if (new_addr[5] == 1 || /* 802.3x Pause address */
1013 new_addr[5] == 2 || /* 802.3ad Slow protocols */
1014 new_addr[5] == 3) /* 802.1X PAE address */
1015 return -EINVAL;
1016 spin_lock_bh(&br->lock);
1017 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1018 spin_unlock_bh(&br->lock);
1019 br->group_addr_set = true;
1020 br_recalculate_fwd_mask(br);
1021 }
1022
1023 if (data[IFLA_BR_FDB_FLUSH])
1024 br_fdb_flush(br);
1025
1026 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1027 if (data[IFLA_BR_MCAST_ROUTER]) {
1028 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1029
1030 err = br_multicast_set_router(br, multicast_router);
1031 if (err)
1032 return err;
1033 }
1034
1035 if (data[IFLA_BR_MCAST_SNOOPING]) {
1036 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1037
1038 err = br_multicast_toggle(br, mcast_snooping);
1039 if (err)
1040 return err;
1041 }
1042
1043 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1044 u8 val;
1045
1046 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1047 br->multicast_query_use_ifaddr = !!val;
1048 }
1049
1050 if (data[IFLA_BR_MCAST_QUERIER]) {
1051 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1052
1053 err = br_multicast_set_querier(br, mcast_querier);
1054 if (err)
1055 return err;
1056 }
1057
1058 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
1059 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
1060
1061 br->hash_elasticity = val;
1062 }
1063
1064 if (data[IFLA_BR_MCAST_HASH_MAX]) {
1065 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1066
1067 err = br_multicast_set_hash_max(br, hash_max);
1068 if (err)
1069 return err;
1070 }
1071
1072 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1073 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1074
1075 br->multicast_last_member_count = val;
1076 }
1077
1078 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1079 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1080
1081 br->multicast_startup_query_count = val;
1082 }
1083
1084 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1085 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1086
1087 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1088 }
1089
1090 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1091 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1092
1093 br->multicast_membership_interval = clock_t_to_jiffies(val);
1094 }
1095
1096 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1097 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1098
1099 br->multicast_querier_interval = clock_t_to_jiffies(val);
1100 }
1101
1102 if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1103 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1104
1105 br->multicast_query_interval = clock_t_to_jiffies(val);
1106 }
1107
1108 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1109 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1110
1111 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1112 }
1113
1114 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1115 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1116
1117 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1118 }
1119
1120 if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1121 __u8 mcast_stats;
1122
1123 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1124 br->multicast_stats_enabled = !!mcast_stats;
1125 }
1126
1127 if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1128 __u8 igmp_version;
1129
1130 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1131 err = br_multicast_set_igmp_version(br, igmp_version);
1132 if (err)
1133 return err;
1134 }
1135
1136 #if IS_ENABLED(CONFIG_IPV6)
1137 if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1138 __u8 mld_version;
1139
1140 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1141 err = br_multicast_set_mld_version(br, mld_version);
1142 if (err)
1143 return err;
1144 }
1145 #endif
1146 #endif
1147 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1148 if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1149 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1150
1151 br->nf_call_iptables = val ? true : false;
1152 }
1153
1154 if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1155 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1156
1157 br->nf_call_ip6tables = val ? true : false;
1158 }
1159
1160 if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1161 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1162
1163 br->nf_call_arptables = val ? true : false;
1164 }
1165 #endif
1166
1167 return 0;
1168 }
1169
1170 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1171 struct nlattr *tb[], struct nlattr *data[])
1172 {
1173 struct net_bridge *br = netdev_priv(dev);
1174 int err;
1175
1176 if (tb[IFLA_ADDRESS]) {
1177 spin_lock_bh(&br->lock);
1178 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1179 spin_unlock_bh(&br->lock);
1180 }
1181
1182 err = register_netdevice(dev);
1183 if (err)
1184 return err;
1185
1186 err = br_changelink(dev, tb, data);
1187 if (err)
1188 unregister_netdevice(dev);
1189 return err;
1190 }
1191
1192 static size_t br_get_size(const struct net_device *brdev)
1193 {
1194 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
1195 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
1196 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
1197 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
1198 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
1199 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
1200 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
1201 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1202 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1203 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */
1204 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */
1205 #endif
1206 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
1207 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */
1208 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */
1209 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */
1210 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */
1211 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */
1212 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1213 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1214 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1215 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1216 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1217 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
1218 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1219 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */
1220 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */
1221 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1222 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */
1223 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */
1224 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */
1225 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */
1226 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1227 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1228 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1229 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1230 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1231 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1232 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1233 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1234 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */
1235 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */
1236 #endif
1237 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1238 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */
1239 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */
1240 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */
1241 #endif
1242 0;
1243 }
1244
1245 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1246 {
1247 struct net_bridge *br = netdev_priv(brdev);
1248 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1249 u32 hello_time = jiffies_to_clock_t(br->hello_time);
1250 u32 age_time = jiffies_to_clock_t(br->max_age);
1251 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1252 u32 stp_enabled = br->stp_enabled;
1253 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1254 u8 vlan_enabled = br_vlan_enabled(br);
1255 u64 clockval;
1256
1257 clockval = br_timer_value(&br->hello_timer);
1258 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1259 return -EMSGSIZE;
1260 clockval = br_timer_value(&br->tcn_timer);
1261 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1262 return -EMSGSIZE;
1263 clockval = br_timer_value(&br->topology_change_timer);
1264 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1265 IFLA_BR_PAD))
1266 return -EMSGSIZE;
1267 clockval = br_timer_value(&br->gc_work.timer);
1268 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1269 return -EMSGSIZE;
1270
1271 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1272 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1273 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1274 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1275 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1276 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1277 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1278 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1279 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1280 &br->bridge_id) ||
1281 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1282 &br->designated_root) ||
1283 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1284 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1285 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1286 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1287 br->topology_change_detected) ||
1288 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1289 return -EMSGSIZE;
1290
1291 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1292 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1293 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1294 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled))
1295 return -EMSGSIZE;
1296 #endif
1297 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1298 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1299 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1300 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1301 br->multicast_query_use_ifaddr) ||
1302 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1303 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1304 br->multicast_stats_enabled) ||
1305 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1306 br->hash_elasticity) ||
1307 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1308 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1309 br->multicast_last_member_count) ||
1310 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1311 br->multicast_startup_query_count) ||
1312 nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1313 br->multicast_igmp_version))
1314 return -EMSGSIZE;
1315 #if IS_ENABLED(CONFIG_IPV6)
1316 if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1317 br->multicast_mld_version))
1318 return -EMSGSIZE;
1319 #endif
1320 clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1321 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1322 IFLA_BR_PAD))
1323 return -EMSGSIZE;
1324 clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1325 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1326 IFLA_BR_PAD))
1327 return -EMSGSIZE;
1328 clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1329 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1330 IFLA_BR_PAD))
1331 return -EMSGSIZE;
1332 clockval = jiffies_to_clock_t(br->multicast_query_interval);
1333 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1334 IFLA_BR_PAD))
1335 return -EMSGSIZE;
1336 clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1337 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1338 IFLA_BR_PAD))
1339 return -EMSGSIZE;
1340 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1341 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1342 IFLA_BR_PAD))
1343 return -EMSGSIZE;
1344 #endif
1345 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1346 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1347 br->nf_call_iptables ? 1 : 0) ||
1348 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1349 br->nf_call_ip6tables ? 1 : 0) ||
1350 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1351 br->nf_call_arptables ? 1 : 0))
1352 return -EMSGSIZE;
1353 #endif
1354
1355 return 0;
1356 }
1357
1358 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1359 {
1360 struct net_bridge_port *p = NULL;
1361 struct net_bridge_vlan_group *vg;
1362 struct net_bridge_vlan *v;
1363 struct net_bridge *br;
1364 int numvls = 0;
1365
1366 switch (attr) {
1367 case IFLA_STATS_LINK_XSTATS:
1368 br = netdev_priv(dev);
1369 vg = br_vlan_group(br);
1370 break;
1371 case IFLA_STATS_LINK_XSTATS_SLAVE:
1372 p = br_port_get_rtnl(dev);
1373 if (!p)
1374 return 0;
1375 br = p->br;
1376 vg = nbp_vlan_group(p);
1377 break;
1378 default:
1379 return 0;
1380 }
1381
1382 if (vg) {
1383 /* we need to count all, even placeholder entries */
1384 list_for_each_entry(v, &vg->vlan_list, vlist)
1385 numvls++;
1386 }
1387
1388 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1389 nla_total_size(sizeof(struct br_mcast_stats)) +
1390 nla_total_size(0);
1391 }
1392
1393 static int br_fill_linkxstats(struct sk_buff *skb,
1394 const struct net_device *dev,
1395 int *prividx, int attr)
1396 {
1397 struct nlattr *nla __maybe_unused;
1398 struct net_bridge_port *p = NULL;
1399 struct net_bridge_vlan_group *vg;
1400 struct net_bridge_vlan *v;
1401 struct net_bridge *br;
1402 struct nlattr *nest;
1403 int vl_idx = 0;
1404
1405 switch (attr) {
1406 case IFLA_STATS_LINK_XSTATS:
1407 br = netdev_priv(dev);
1408 vg = br_vlan_group(br);
1409 break;
1410 case IFLA_STATS_LINK_XSTATS_SLAVE:
1411 p = br_port_get_rtnl(dev);
1412 if (!p)
1413 return 0;
1414 br = p->br;
1415 vg = nbp_vlan_group(p);
1416 break;
1417 default:
1418 return -EINVAL;
1419 }
1420
1421 nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE);
1422 if (!nest)
1423 return -EMSGSIZE;
1424
1425 if (vg) {
1426 u16 pvid;
1427
1428 pvid = br_get_pvid(vg);
1429 list_for_each_entry(v, &vg->vlan_list, vlist) {
1430 struct bridge_vlan_xstats vxi;
1431 struct br_vlan_stats stats;
1432
1433 if (++vl_idx < *prividx)
1434 continue;
1435 memset(&vxi, 0, sizeof(vxi));
1436 vxi.vid = v->vid;
1437 vxi.flags = v->flags;
1438 if (v->vid == pvid)
1439 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1440 br_vlan_get_stats(v, &stats);
1441 vxi.rx_bytes = stats.rx_bytes;
1442 vxi.rx_packets = stats.rx_packets;
1443 vxi.tx_bytes = stats.tx_bytes;
1444 vxi.tx_packets = stats.tx_packets;
1445
1446 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1447 goto nla_put_failure;
1448 }
1449 }
1450
1451 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1452 if (++vl_idx >= *prividx) {
1453 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1454 sizeof(struct br_mcast_stats),
1455 BRIDGE_XSTATS_PAD);
1456 if (!nla)
1457 goto nla_put_failure;
1458 br_multicast_get_stats(br, p, nla_data(nla));
1459 }
1460 #endif
1461 nla_nest_end(skb, nest);
1462 *prividx = 0;
1463
1464 return 0;
1465
1466 nla_put_failure:
1467 nla_nest_end(skb, nest);
1468 *prividx = vl_idx;
1469
1470 return -EMSGSIZE;
1471 }
1472
1473 static struct rtnl_af_ops br_af_ops __read_mostly = {
1474 .family = AF_BRIDGE,
1475 .get_link_af_size = br_get_link_af_size_filtered,
1476 };
1477
1478 struct rtnl_link_ops br_link_ops __read_mostly = {
1479 .kind = "bridge",
1480 .priv_size = sizeof(struct net_bridge),
1481 .setup = br_dev_setup,
1482 .maxtype = IFLA_BR_MAX,
1483 .policy = br_policy,
1484 .validate = br_validate,
1485 .newlink = br_dev_newlink,
1486 .changelink = br_changelink,
1487 .dellink = br_dev_delete,
1488 .get_size = br_get_size,
1489 .fill_info = br_fill_info,
1490 .fill_linkxstats = br_fill_linkxstats,
1491 .get_linkxstats_size = br_get_linkxstats_size,
1492
1493 .slave_maxtype = IFLA_BRPORT_MAX,
1494 .slave_policy = br_port_policy,
1495 .slave_changelink = br_port_slave_changelink,
1496 .get_slave_size = br_port_get_slave_size,
1497 .fill_slave_info = br_port_fill_slave_info,
1498 };
1499
1500 int __init br_netlink_init(void)
1501 {
1502 int err;
1503
1504 br_mdb_init();
1505 rtnl_af_register(&br_af_ops);
1506
1507 err = rtnl_link_register(&br_link_ops);
1508 if (err)
1509 goto out_af;
1510
1511 return 0;
1512
1513 out_af:
1514 rtnl_af_unregister(&br_af_ops);
1515 br_mdb_uninit();
1516 return err;
1517 }
1518
1519 void br_netlink_fini(void)
1520 {
1521 br_mdb_uninit();
1522 rtnl_af_unregister(&br_af_ops);
1523 rtnl_link_unregister(&br_link_ops);
1524 }
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