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[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 <net/switchdev.h>
20 #include <uapi/linux/if_bridge.h>
21
22 #include "br_private.h"
23 #include "br_private_stp.h"
24
25 static inline size_t br_port_info_size(void)
26 {
27 return nla_total_size(1) /* IFLA_BRPORT_STATE */
28 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */
29 + nla_total_size(4) /* IFLA_BRPORT_COST */
30 + nla_total_size(1) /* IFLA_BRPORT_MODE */
31 + nla_total_size(1) /* IFLA_BRPORT_GUARD */
32 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
33 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
34 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
35 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
36 + 0;
37 }
38
39 static inline size_t br_nlmsg_size(void)
40 {
41 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
42 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
43 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
44 + nla_total_size(4) /* IFLA_MASTER */
45 + nla_total_size(4) /* IFLA_MTU */
46 + nla_total_size(4) /* IFLA_LINK */
47 + nla_total_size(1) /* IFLA_OPERSTATE */
48 + nla_total_size(br_port_info_size()); /* IFLA_PROTINFO */
49 }
50
51 static int br_port_fill_attrs(struct sk_buff *skb,
52 const struct net_bridge_port *p)
53 {
54 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
55
56 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
57 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
58 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
59 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
60 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
61 nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
62 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
63 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
64 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
65 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)))
66 return -EMSGSIZE;
67
68 return 0;
69 }
70
71 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
72 u16 vid_end, u16 flags)
73 {
74 struct bridge_vlan_info vinfo;
75
76 if ((vid_end - vid_start) > 0) {
77 /* add range to skb */
78 vinfo.vid = vid_start;
79 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
80 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
81 sizeof(vinfo), &vinfo))
82 goto nla_put_failure;
83
84 vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
85
86 vinfo.vid = vid_end;
87 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
88 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
89 sizeof(vinfo), &vinfo))
90 goto nla_put_failure;
91 } else {
92 vinfo.vid = vid_start;
93 vinfo.flags = flags;
94 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
95 sizeof(vinfo), &vinfo))
96 goto nla_put_failure;
97 }
98
99 return 0;
100
101 nla_put_failure:
102 return -EMSGSIZE;
103 }
104
105 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
106 const struct net_port_vlans *pv)
107 {
108 u16 vid_range_start = 0, vid_range_end = 0;
109 u16 vid_range_flags = 0;
110 u16 pvid, vid, flags;
111 int err = 0;
112
113 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
114 * and mark vlan info with begin and end flags
115 * if vlaninfo represents a range
116 */
117 pvid = br_get_pvid(pv);
118 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
119 flags = 0;
120 if (vid == pvid)
121 flags |= BRIDGE_VLAN_INFO_PVID;
122
123 if (test_bit(vid, pv->untagged_bitmap))
124 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
125
126 if (vid_range_start == 0) {
127 goto initvars;
128 } else if ((vid - vid_range_end) == 1 &&
129 flags == vid_range_flags) {
130 vid_range_end = vid;
131 continue;
132 } else {
133 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
134 vid_range_end,
135 vid_range_flags);
136 if (err)
137 return err;
138 }
139
140 initvars:
141 vid_range_start = vid;
142 vid_range_end = vid;
143 vid_range_flags = flags;
144 }
145
146 if (vid_range_start != 0) {
147 /* Call it once more to send any left over vlans */
148 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
149 vid_range_end,
150 vid_range_flags);
151 if (err)
152 return err;
153 }
154
155 return 0;
156 }
157
158 static int br_fill_ifvlaninfo(struct sk_buff *skb,
159 const struct net_port_vlans *pv)
160 {
161 struct bridge_vlan_info vinfo;
162 u16 pvid, vid;
163
164 pvid = br_get_pvid(pv);
165 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
166 vinfo.vid = vid;
167 vinfo.flags = 0;
168 if (vid == pvid)
169 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
170
171 if (test_bit(vid, pv->untagged_bitmap))
172 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
173
174 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
175 sizeof(vinfo), &vinfo))
176 goto nla_put_failure;
177 }
178
179 return 0;
180
181 nla_put_failure:
182 return -EMSGSIZE;
183 }
184
185 /*
186 * Create one netlink message for one interface
187 * Contains port and master info as well as carrier and bridge state.
188 */
189 static int br_fill_ifinfo(struct sk_buff *skb,
190 const struct net_bridge_port *port,
191 u32 pid, u32 seq, int event, unsigned int flags,
192 u32 filter_mask, const struct net_device *dev)
193 {
194 const struct net_bridge *br;
195 struct ifinfomsg *hdr;
196 struct nlmsghdr *nlh;
197 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
198
199 if (port)
200 br = port->br;
201 else
202 br = netdev_priv(dev);
203
204 br_debug(br, "br_fill_info event %d port %s master %s\n",
205 event, dev->name, br->dev->name);
206
207 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
208 if (nlh == NULL)
209 return -EMSGSIZE;
210
211 hdr = nlmsg_data(nlh);
212 hdr->ifi_family = AF_BRIDGE;
213 hdr->__ifi_pad = 0;
214 hdr->ifi_type = dev->type;
215 hdr->ifi_index = dev->ifindex;
216 hdr->ifi_flags = dev_get_flags(dev);
217 hdr->ifi_change = 0;
218
219 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
220 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
221 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
222 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
223 (dev->addr_len &&
224 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
225 (dev->ifindex != dev->iflink &&
226 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
227 goto nla_put_failure;
228
229 if (event == RTM_NEWLINK && port) {
230 struct nlattr *nest
231 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
232
233 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
234 goto nla_put_failure;
235 nla_nest_end(skb, nest);
236 }
237
238 /* Check if the VID information is requested */
239 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
240 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
241 const struct net_port_vlans *pv;
242 struct nlattr *af;
243 int err;
244
245 if (port)
246 pv = nbp_get_vlan_info(port);
247 else
248 pv = br_get_vlan_info(br);
249
250 if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID))
251 goto done;
252
253 af = nla_nest_start(skb, IFLA_AF_SPEC);
254 if (!af)
255 goto nla_put_failure;
256
257 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
258 err = br_fill_ifvlaninfo_compressed(skb, pv);
259 else
260 err = br_fill_ifvlaninfo(skb, pv);
261 if (err)
262 goto nla_put_failure;
263 nla_nest_end(skb, af);
264 }
265
266 done:
267 nlmsg_end(skb, nlh);
268 return 0;
269
270 nla_put_failure:
271 nlmsg_cancel(skb, nlh);
272 return -EMSGSIZE;
273 }
274
275 /*
276 * Notify listeners of a change in port information
277 */
278 void br_ifinfo_notify(int event, struct net_bridge_port *port)
279 {
280 struct net *net;
281 struct sk_buff *skb;
282 int err = -ENOBUFS;
283
284 if (!port)
285 return;
286
287 net = dev_net(port->dev);
288 br_debug(port->br, "port %u(%s) event %d\n",
289 (unsigned int)port->port_no, port->dev->name, event);
290
291 skb = nlmsg_new(br_nlmsg_size(), GFP_ATOMIC);
292 if (skb == NULL)
293 goto errout;
294
295 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, 0, port->dev);
296 if (err < 0) {
297 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
298 WARN_ON(err == -EMSGSIZE);
299 kfree_skb(skb);
300 goto errout;
301 }
302 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
303 return;
304 errout:
305 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
306 }
307
308
309 /*
310 * Dump information about all ports, in response to GETLINK
311 */
312 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
313 struct net_device *dev, u32 filter_mask)
314 {
315 struct net_bridge_port *port = br_port_get_rtnl(dev);
316
317 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
318 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
319 return 0;
320
321 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI,
322 filter_mask, dev);
323 }
324
325 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
326 int cmd, struct bridge_vlan_info *vinfo)
327 {
328 int err = 0;
329
330 switch (cmd) {
331 case RTM_SETLINK:
332 if (p) {
333 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
334 if (err)
335 break;
336
337 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
338 err = br_vlan_add(p->br, vinfo->vid,
339 vinfo->flags);
340 } else {
341 err = br_vlan_add(br, vinfo->vid, vinfo->flags);
342 }
343 break;
344
345 case RTM_DELLINK:
346 if (p) {
347 nbp_vlan_delete(p, vinfo->vid);
348 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
349 br_vlan_delete(p->br, vinfo->vid);
350 } else {
351 br_vlan_delete(br, vinfo->vid);
352 }
353 break;
354 }
355
356 return err;
357 }
358
359 static int br_afspec(struct net_bridge *br,
360 struct net_bridge_port *p,
361 struct nlattr *af_spec,
362 int cmd)
363 {
364 struct bridge_vlan_info *vinfo_start = NULL;
365 struct bridge_vlan_info *vinfo = NULL;
366 struct nlattr *attr;
367 int err = 0;
368 int rem;
369
370 nla_for_each_nested(attr, af_spec, rem) {
371 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
372 continue;
373 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
374 return -EINVAL;
375 vinfo = nla_data(attr);
376 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
377 if (vinfo_start)
378 return -EINVAL;
379 vinfo_start = vinfo;
380 continue;
381 }
382
383 if (vinfo_start) {
384 struct bridge_vlan_info tmp_vinfo;
385 int v;
386
387 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
388 return -EINVAL;
389
390 if (vinfo->vid <= vinfo_start->vid)
391 return -EINVAL;
392
393 memcpy(&tmp_vinfo, vinfo_start,
394 sizeof(struct bridge_vlan_info));
395
396 for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
397 tmp_vinfo.vid = v;
398 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
399 if (err)
400 break;
401 }
402 vinfo_start = NULL;
403 } else {
404 err = br_vlan_info(br, p, cmd, vinfo);
405 }
406 if (err)
407 break;
408 }
409
410 return err;
411 }
412
413 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
414 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
415 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
416 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
417 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
418 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
419 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
420 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
421 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
422 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
423 };
424
425 /* Change the state of the port and notify spanning tree */
426 static int br_set_port_state(struct net_bridge_port *p, u8 state)
427 {
428 if (state > BR_STATE_BLOCKING)
429 return -EINVAL;
430
431 /* if kernel STP is running, don't allow changes */
432 if (p->br->stp_enabled == BR_KERNEL_STP)
433 return -EBUSY;
434
435 /* if device is not up, change is not allowed
436 * if link is not present, only allowable state is disabled
437 */
438 if (!netif_running(p->dev) ||
439 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
440 return -ENETDOWN;
441
442 br_set_state(p, state);
443 br_log_state(p);
444 br_port_state_selection(p->br);
445 return 0;
446 }
447
448 /* Set/clear or port flags based on attribute */
449 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
450 int attrtype, unsigned long mask)
451 {
452 if (tb[attrtype]) {
453 u8 flag = nla_get_u8(tb[attrtype]);
454 if (flag)
455 p->flags |= mask;
456 else
457 p->flags &= ~mask;
458 }
459 }
460
461 /* Process bridge protocol info on port */
462 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
463 {
464 int err;
465 unsigned long old_flags = p->flags;
466
467 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
468 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
469 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
470 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
471 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
472 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
473 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
474
475 if (tb[IFLA_BRPORT_COST]) {
476 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
477 if (err)
478 return err;
479 }
480
481 if (tb[IFLA_BRPORT_PRIORITY]) {
482 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
483 if (err)
484 return err;
485 }
486
487 if (tb[IFLA_BRPORT_STATE]) {
488 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
489 if (err)
490 return err;
491 }
492
493 br_port_flags_change(p, old_flags ^ p->flags);
494 return 0;
495 }
496
497 /* Change state and parameters on port. */
498 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
499 {
500 struct nlattr *protinfo;
501 struct nlattr *afspec;
502 struct net_bridge_port *p;
503 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
504 int err = 0, ret_offload = 0;
505
506 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
507 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
508 if (!protinfo && !afspec)
509 return 0;
510
511 p = br_port_get_rtnl(dev);
512 /* We want to accept dev as bridge itself if the AF_SPEC
513 * is set to see if someone is setting vlan info on the bridge
514 */
515 if (!p && !afspec)
516 return -EINVAL;
517
518 if (p && protinfo) {
519 if (protinfo->nla_type & NLA_F_NESTED) {
520 err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
521 protinfo, br_port_policy);
522 if (err)
523 return err;
524
525 spin_lock_bh(&p->br->lock);
526 err = br_setport(p, tb);
527 spin_unlock_bh(&p->br->lock);
528 } else {
529 /* Binary compatibility with old RSTP */
530 if (nla_len(protinfo) < sizeof(u8))
531 return -EINVAL;
532
533 spin_lock_bh(&p->br->lock);
534 err = br_set_port_state(p, nla_get_u8(protinfo));
535 spin_unlock_bh(&p->br->lock);
536 }
537 if (err)
538 goto out;
539 }
540
541 if (afspec) {
542 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
543 afspec, RTM_SETLINK);
544 }
545
546 if (p && !(flags & BRIDGE_FLAGS_SELF)) {
547 /* set bridge attributes in hardware if supported
548 */
549 ret_offload = netdev_switch_port_bridge_setlink(dev, nlh,
550 flags);
551 if (ret_offload && ret_offload != -EOPNOTSUPP)
552 br_warn(p->br, "error setting attrs on port %u(%s)\n",
553 (unsigned int)p->port_no, p->dev->name);
554 }
555
556 if (err == 0)
557 br_ifinfo_notify(RTM_NEWLINK, p);
558 out:
559 return err;
560 }
561
562 /* Delete port information */
563 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
564 {
565 struct nlattr *afspec;
566 struct net_bridge_port *p;
567 int err = 0, ret_offload = 0;
568
569 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
570 if (!afspec)
571 return 0;
572
573 p = br_port_get_rtnl(dev);
574 /* We want to accept dev as bridge itself as well */
575 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
576 return -EINVAL;
577
578 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
579 afspec, RTM_DELLINK);
580 if (err == 0)
581 /* Send RTM_NEWLINK because userspace
582 * expects RTM_NEWLINK for vlan dels
583 */
584 br_ifinfo_notify(RTM_NEWLINK, p);
585
586 if (p && !(flags & BRIDGE_FLAGS_SELF)) {
587 /* del bridge attributes in hardware
588 */
589 ret_offload = netdev_switch_port_bridge_dellink(dev, nlh,
590 flags);
591 if (ret_offload && ret_offload != -EOPNOTSUPP)
592 br_warn(p->br, "error deleting attrs on port %u (%s)\n",
593 (unsigned int)p->port_no, p->dev->name);
594 }
595
596 return err;
597 }
598 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
599 {
600 if (tb[IFLA_ADDRESS]) {
601 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
602 return -EINVAL;
603 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
604 return -EADDRNOTAVAIL;
605 }
606
607 return 0;
608 }
609
610 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
611 struct nlattr *tb[], struct nlattr *data[])
612 {
613 struct net_bridge *br = netdev_priv(dev);
614
615 if (tb[IFLA_ADDRESS]) {
616 spin_lock_bh(&br->lock);
617 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
618 spin_unlock_bh(&br->lock);
619 }
620
621 return register_netdevice(dev);
622 }
623
624 static int br_port_slave_changelink(struct net_device *brdev,
625 struct net_device *dev,
626 struct nlattr *tb[],
627 struct nlattr *data[])
628 {
629 if (!data)
630 return 0;
631 return br_setport(br_port_get_rtnl(dev), data);
632 }
633
634 static int br_port_fill_slave_info(struct sk_buff *skb,
635 const struct net_device *brdev,
636 const struct net_device *dev)
637 {
638 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
639 }
640
641 static size_t br_port_get_slave_size(const struct net_device *brdev,
642 const struct net_device *dev)
643 {
644 return br_port_info_size();
645 }
646
647 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
648 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
649 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
650 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
651 };
652
653 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
654 struct nlattr *data[])
655 {
656 struct net_bridge *br = netdev_priv(brdev);
657 int err;
658
659 if (!data)
660 return 0;
661
662 if (data[IFLA_BR_FORWARD_DELAY]) {
663 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
664 if (err)
665 return err;
666 }
667
668 if (data[IFLA_BR_HELLO_TIME]) {
669 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
670 if (err)
671 return err;
672 }
673
674 if (data[IFLA_BR_MAX_AGE]) {
675 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
676 if (err)
677 return err;
678 }
679
680 return 0;
681 }
682
683 static size_t br_get_size(const struct net_device *brdev)
684 {
685 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
686 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
687 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
688 0;
689 }
690
691 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
692 {
693 struct net_bridge *br = netdev_priv(brdev);
694 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
695 u32 hello_time = jiffies_to_clock_t(br->hello_time);
696 u32 age_time = jiffies_to_clock_t(br->max_age);
697
698 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
699 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
700 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time))
701 return -EMSGSIZE;
702
703 return 0;
704 }
705
706 static size_t br_get_link_af_size(const struct net_device *dev)
707 {
708 struct net_port_vlans *pv;
709
710 if (br_port_exists(dev))
711 pv = nbp_get_vlan_info(br_port_get_rtnl(dev));
712 else if (dev->priv_flags & IFF_EBRIDGE)
713 pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
714 else
715 return 0;
716
717 if (!pv)
718 return 0;
719
720 /* Each VLAN is returned in bridge_vlan_info along with flags */
721 return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
722 }
723
724 static struct rtnl_af_ops br_af_ops __read_mostly = {
725 .family = AF_BRIDGE,
726 .get_link_af_size = br_get_link_af_size,
727 };
728
729 struct rtnl_link_ops br_link_ops __read_mostly = {
730 .kind = "bridge",
731 .priv_size = sizeof(struct net_bridge),
732 .setup = br_dev_setup,
733 .maxtype = IFLA_BRPORT_MAX,
734 .policy = br_policy,
735 .validate = br_validate,
736 .newlink = br_dev_newlink,
737 .changelink = br_changelink,
738 .dellink = br_dev_delete,
739 .get_size = br_get_size,
740 .fill_info = br_fill_info,
741
742 .slave_maxtype = IFLA_BRPORT_MAX,
743 .slave_policy = br_port_policy,
744 .slave_changelink = br_port_slave_changelink,
745 .get_slave_size = br_port_get_slave_size,
746 .fill_slave_info = br_port_fill_slave_info,
747 };
748
749 int __init br_netlink_init(void)
750 {
751 int err;
752
753 br_mdb_init();
754 rtnl_af_register(&br_af_ops);
755
756 err = rtnl_link_register(&br_link_ops);
757 if (err)
758 goto out_af;
759
760 return 0;
761
762 out_af:
763 rtnl_af_unregister(&br_af_ops);
764 br_mdb_uninit();
765 return err;
766 }
767
768 void br_netlink_fini(void)
769 {
770 br_mdb_uninit();
771 rtnl_af_unregister(&br_af_ops);
772 rtnl_link_unregister(&br_link_ops);
773 }
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