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