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bridge: vlan: add per-vlan struct and move to rhashtables
[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 int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
25 u32 filter_mask,
26 u16 pvid)
27 {
28 struct net_bridge_vlan *v;
29 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
30 u16 flags;
31 int num_vlans = 0;
32
33 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
34 return 0;
35
36 /* Count number of vlan infos */
37 list_for_each_entry(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 }
60 initvars:
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
76 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
77 u32 filter_mask, u16 pvid)
78 {
79 if (!vg)
80 return 0;
81
82 if (filter_mask & RTEXT_FILTER_BRVLAN)
83 return vg->num_vlans;
84
85 return __get_num_vlan_infos(vg, filter_mask, pvid);
86 }
87
88 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
89 u32 filter_mask)
90 {
91 struct net_bridge_vlan_group *vg = NULL;
92 struct net_bridge_port *p;
93 struct net_bridge *br;
94 int num_vlan_infos;
95 u16 pvid = 0;
96
97 rcu_read_lock();
98 if (br_port_exists(dev)) {
99 p = br_port_get_rcu(dev);
100 vg = nbp_vlan_group(p);
101 pvid = nbp_get_pvid(p);
102 } else if (dev->priv_flags & IFF_EBRIDGE) {
103 br = netdev_priv(dev);
104 vg = br_vlan_group(br);
105 pvid = br_get_pvid(br);
106 }
107 num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask, pvid);
108 rcu_read_unlock();
109
110 /* Each VLAN is returned in bridge_vlan_info along with flags */
111 return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
112 }
113
114 static inline size_t br_port_info_size(void)
115 {
116 return nla_total_size(1) /* IFLA_BRPORT_STATE */
117 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */
118 + nla_total_size(4) /* IFLA_BRPORT_COST */
119 + nla_total_size(1) /* IFLA_BRPORT_MODE */
120 + nla_total_size(1) /* IFLA_BRPORT_GUARD */
121 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
122 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
123 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
124 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
125 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
126 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
127 + 0;
128 }
129
130 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
131 {
132 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
133 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
134 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
135 + nla_total_size(4) /* IFLA_MASTER */
136 + nla_total_size(4) /* IFLA_MTU */
137 + nla_total_size(4) /* IFLA_LINK */
138 + nla_total_size(1) /* IFLA_OPERSTATE */
139 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
140 + nla_total_size(br_get_link_af_size_filtered(dev,
141 filter_mask)); /* IFLA_AF_SPEC */
142 }
143
144 static int br_port_fill_attrs(struct sk_buff *skb,
145 const struct net_bridge_port *p)
146 {
147 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
148
149 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
150 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
151 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
152 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
153 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
154 nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
155 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
156 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
157 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
158 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
159 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
160 !!(p->flags & BR_PROXYARP_WIFI)))
161 return -EMSGSIZE;
162
163 return 0;
164 }
165
166 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
167 u16 vid_end, u16 flags)
168 {
169 struct bridge_vlan_info vinfo;
170
171 if ((vid_end - vid_start) > 0) {
172 /* add range to skb */
173 vinfo.vid = vid_start;
174 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
175 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
176 sizeof(vinfo), &vinfo))
177 goto nla_put_failure;
178
179 vinfo.vid = vid_end;
180 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
181 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
182 sizeof(vinfo), &vinfo))
183 goto nla_put_failure;
184 } else {
185 vinfo.vid = vid_start;
186 vinfo.flags = flags;
187 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
188 sizeof(vinfo), &vinfo))
189 goto nla_put_failure;
190 }
191
192 return 0;
193
194 nla_put_failure:
195 return -EMSGSIZE;
196 }
197
198 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
199 struct net_bridge_vlan_group *vg,
200 u16 pvid)
201 {
202 struct net_bridge_vlan *v;
203 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
204 u16 flags;
205 int err = 0;
206
207 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
208 * and mark vlan info with begin and end flags
209 * if vlaninfo represents a range
210 */
211 list_for_each_entry(v, &vg->vlan_list, vlist) {
212 flags = 0;
213 if (!br_vlan_should_use(v))
214 continue;
215 if (v->vid == pvid)
216 flags |= BRIDGE_VLAN_INFO_PVID;
217
218 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
219 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
220
221 if (vid_range_start == 0) {
222 goto initvars;
223 } else if ((v->vid - vid_range_end) == 1 &&
224 flags == vid_range_flags) {
225 vid_range_end = v->vid;
226 continue;
227 } else {
228 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
229 vid_range_end,
230 vid_range_flags);
231 if (err)
232 return err;
233 }
234
235 initvars:
236 vid_range_start = v->vid;
237 vid_range_end = v->vid;
238 vid_range_flags = flags;
239 }
240
241 if (vid_range_start != 0) {
242 /* Call it once more to send any left over vlans */
243 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
244 vid_range_end,
245 vid_range_flags);
246 if (err)
247 return err;
248 }
249
250 return 0;
251 }
252
253 static int br_fill_ifvlaninfo(struct sk_buff *skb,
254 struct net_bridge_vlan_group *vg,
255 u16 pvid)
256 {
257 struct bridge_vlan_info vinfo;
258 struct net_bridge_vlan *v;
259
260 list_for_each_entry(v, &vg->vlan_list, vlist) {
261 if (!br_vlan_should_use(v))
262 continue;
263
264 vinfo.vid = v->vid;
265 vinfo.flags = 0;
266 if (v->vid == pvid)
267 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
268
269 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
270 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
271
272 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
273 sizeof(vinfo), &vinfo))
274 goto nla_put_failure;
275 }
276
277 return 0;
278
279 nla_put_failure:
280 return -EMSGSIZE;
281 }
282
283 /*
284 * Create one netlink message for one interface
285 * Contains port and master info as well as carrier and bridge state.
286 */
287 static int br_fill_ifinfo(struct sk_buff *skb,
288 struct net_bridge_port *port,
289 u32 pid, u32 seq, int event, unsigned int flags,
290 u32 filter_mask, const struct net_device *dev)
291 {
292 struct net_bridge *br;
293 struct ifinfomsg *hdr;
294 struct nlmsghdr *nlh;
295 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
296
297 if (port)
298 br = port->br;
299 else
300 br = netdev_priv(dev);
301
302 br_debug(br, "br_fill_info event %d port %s master %s\n",
303 event, dev->name, br->dev->name);
304
305 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
306 if (nlh == NULL)
307 return -EMSGSIZE;
308
309 hdr = nlmsg_data(nlh);
310 hdr->ifi_family = AF_BRIDGE;
311 hdr->__ifi_pad = 0;
312 hdr->ifi_type = dev->type;
313 hdr->ifi_index = dev->ifindex;
314 hdr->ifi_flags = dev_get_flags(dev);
315 hdr->ifi_change = 0;
316
317 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
318 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
319 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
320 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
321 (dev->addr_len &&
322 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
323 (dev->ifindex != dev_get_iflink(dev) &&
324 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
325 goto nla_put_failure;
326
327 if (event == RTM_NEWLINK && port) {
328 struct nlattr *nest
329 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
330
331 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
332 goto nla_put_failure;
333 nla_nest_end(skb, nest);
334 }
335
336 /* Check if the VID information is requested */
337 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
338 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
339 struct net_bridge_vlan_group *vg;
340 struct nlattr *af;
341 u16 pvid;
342 int err;
343
344 if (port) {
345 vg = nbp_vlan_group(port);
346 pvid = nbp_get_pvid(port);
347 } else {
348 vg = br_vlan_group(br);
349 pvid = br_get_pvid(br);
350 }
351
352 if (!vg || !vg->num_vlans)
353 goto done;
354
355 af = nla_nest_start(skb, IFLA_AF_SPEC);
356 if (!af)
357 goto nla_put_failure;
358
359 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
360 err = br_fill_ifvlaninfo_compressed(skb, vg, pvid);
361 else
362 err = br_fill_ifvlaninfo(skb, vg, pvid);
363 if (err)
364 goto nla_put_failure;
365 nla_nest_end(skb, af);
366 }
367
368 done:
369 nlmsg_end(skb, nlh);
370 return 0;
371
372 nla_put_failure:
373 nlmsg_cancel(skb, nlh);
374 return -EMSGSIZE;
375 }
376
377 /*
378 * Notify listeners of a change in port information
379 */
380 void br_ifinfo_notify(int event, struct net_bridge_port *port)
381 {
382 struct net *net;
383 struct sk_buff *skb;
384 int err = -ENOBUFS;
385 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
386
387 if (!port)
388 return;
389
390 net = dev_net(port->dev);
391 br_debug(port->br, "port %u(%s) event %d\n",
392 (unsigned int)port->port_no, port->dev->name, event);
393
394 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
395 if (skb == NULL)
396 goto errout;
397
398 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
399 if (err < 0) {
400 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
401 WARN_ON(err == -EMSGSIZE);
402 kfree_skb(skb);
403 goto errout;
404 }
405 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
406 return;
407 errout:
408 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
409 }
410
411
412 /*
413 * Dump information about all ports, in response to GETLINK
414 */
415 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
416 struct net_device *dev, u32 filter_mask, int nlflags)
417 {
418 struct net_bridge_port *port = br_port_get_rtnl(dev);
419
420 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
421 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
422 return 0;
423
424 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
425 filter_mask, dev);
426 }
427
428 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
429 int cmd, struct bridge_vlan_info *vinfo)
430 {
431 int err = 0;
432
433 switch (cmd) {
434 case RTM_SETLINK:
435 if (p) {
436 /* if the MASTER flag is set this will act on the global
437 * per-VLAN entry as well
438 */
439 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
440 if (err)
441 break;
442 } else {
443 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
444 err = br_vlan_add(br, vinfo->vid, vinfo->flags);
445 }
446 break;
447
448 case RTM_DELLINK:
449 if (p) {
450 nbp_vlan_delete(p, vinfo->vid);
451 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
452 br_vlan_delete(p->br, vinfo->vid);
453 } else {
454 br_vlan_delete(br, vinfo->vid);
455 }
456 break;
457 }
458
459 return err;
460 }
461
462 static int br_afspec(struct net_bridge *br,
463 struct net_bridge_port *p,
464 struct nlattr *af_spec,
465 int cmd)
466 {
467 struct bridge_vlan_info *vinfo_start = NULL;
468 struct bridge_vlan_info *vinfo = NULL;
469 struct nlattr *attr;
470 int err = 0;
471 int rem;
472
473 nla_for_each_nested(attr, af_spec, rem) {
474 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
475 continue;
476 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
477 return -EINVAL;
478 vinfo = nla_data(attr);
479 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
480 return -EINVAL;
481 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
482 if (vinfo_start)
483 return -EINVAL;
484 vinfo_start = vinfo;
485 continue;
486 }
487
488 if (vinfo_start) {
489 struct bridge_vlan_info tmp_vinfo;
490 int v;
491
492 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
493 return -EINVAL;
494
495 if (vinfo->vid <= vinfo_start->vid)
496 return -EINVAL;
497
498 memcpy(&tmp_vinfo, vinfo_start,
499 sizeof(struct bridge_vlan_info));
500
501 for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
502 tmp_vinfo.vid = v;
503 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
504 if (err)
505 break;
506 }
507 vinfo_start = NULL;
508 } else {
509 err = br_vlan_info(br, p, cmd, vinfo);
510 }
511 if (err)
512 break;
513 }
514
515 return err;
516 }
517
518 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
519 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
520 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
521 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
522 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
523 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
524 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
525 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
526 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
527 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
528 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
529 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
530 };
531
532 /* Change the state of the port and notify spanning tree */
533 static int br_set_port_state(struct net_bridge_port *p, u8 state)
534 {
535 if (state > BR_STATE_BLOCKING)
536 return -EINVAL;
537
538 /* if kernel STP is running, don't allow changes */
539 if (p->br->stp_enabled == BR_KERNEL_STP)
540 return -EBUSY;
541
542 /* if device is not up, change is not allowed
543 * if link is not present, only allowable state is disabled
544 */
545 if (!netif_running(p->dev) ||
546 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
547 return -ENETDOWN;
548
549 br_set_state(p, state);
550 br_log_state(p);
551 br_port_state_selection(p->br);
552 return 0;
553 }
554
555 /* Set/clear or port flags based on attribute */
556 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
557 int attrtype, unsigned long mask)
558 {
559 if (tb[attrtype]) {
560 u8 flag = nla_get_u8(tb[attrtype]);
561 if (flag)
562 p->flags |= mask;
563 else
564 p->flags &= ~mask;
565 }
566 }
567
568 /* Process bridge protocol info on port */
569 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
570 {
571 int err;
572 unsigned long old_flags = p->flags;
573
574 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
575 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
576 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
577 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
578 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
579 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
580 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
581 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
582
583 if (tb[IFLA_BRPORT_COST]) {
584 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
585 if (err)
586 return err;
587 }
588
589 if (tb[IFLA_BRPORT_PRIORITY]) {
590 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
591 if (err)
592 return err;
593 }
594
595 if (tb[IFLA_BRPORT_STATE]) {
596 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
597 if (err)
598 return err;
599 }
600
601 br_port_flags_change(p, old_flags ^ p->flags);
602 return 0;
603 }
604
605 /* Change state and parameters on port. */
606 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
607 {
608 struct nlattr *protinfo;
609 struct nlattr *afspec;
610 struct net_bridge_port *p;
611 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
612 int err = 0;
613
614 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
615 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
616 if (!protinfo && !afspec)
617 return 0;
618
619 p = br_port_get_rtnl(dev);
620 /* We want to accept dev as bridge itself if the AF_SPEC
621 * is set to see if someone is setting vlan info on the bridge
622 */
623 if (!p && !afspec)
624 return -EINVAL;
625
626 if (p && protinfo) {
627 if (protinfo->nla_type & NLA_F_NESTED) {
628 err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
629 protinfo, br_port_policy);
630 if (err)
631 return err;
632
633 spin_lock_bh(&p->br->lock);
634 err = br_setport(p, tb);
635 spin_unlock_bh(&p->br->lock);
636 } else {
637 /* Binary compatibility with old RSTP */
638 if (nla_len(protinfo) < sizeof(u8))
639 return -EINVAL;
640
641 spin_lock_bh(&p->br->lock);
642 err = br_set_port_state(p, nla_get_u8(protinfo));
643 spin_unlock_bh(&p->br->lock);
644 }
645 if (err)
646 goto out;
647 }
648
649 if (afspec) {
650 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
651 afspec, RTM_SETLINK);
652 }
653
654 if (err == 0)
655 br_ifinfo_notify(RTM_NEWLINK, p);
656 out:
657 return err;
658 }
659
660 /* Delete port information */
661 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
662 {
663 struct nlattr *afspec;
664 struct net_bridge_port *p;
665 int err = 0;
666
667 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
668 if (!afspec)
669 return 0;
670
671 p = br_port_get_rtnl(dev);
672 /* We want to accept dev as bridge itself as well */
673 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
674 return -EINVAL;
675
676 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
677 afspec, RTM_DELLINK);
678 if (err == 0)
679 /* Send RTM_NEWLINK because userspace
680 * expects RTM_NEWLINK for vlan dels
681 */
682 br_ifinfo_notify(RTM_NEWLINK, p);
683
684 return err;
685 }
686 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
687 {
688 if (tb[IFLA_ADDRESS]) {
689 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
690 return -EINVAL;
691 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
692 return -EADDRNOTAVAIL;
693 }
694
695 if (!data)
696 return 0;
697
698 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
699 if (data[IFLA_BR_VLAN_PROTOCOL]) {
700 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
701 case htons(ETH_P_8021Q):
702 case htons(ETH_P_8021AD):
703 break;
704 default:
705 return -EPROTONOSUPPORT;
706 }
707 }
708 #endif
709
710 return 0;
711 }
712
713 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
714 struct nlattr *tb[], struct nlattr *data[])
715 {
716 struct net_bridge *br = netdev_priv(dev);
717
718 if (tb[IFLA_ADDRESS]) {
719 spin_lock_bh(&br->lock);
720 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
721 spin_unlock_bh(&br->lock);
722 }
723
724 return register_netdevice(dev);
725 }
726
727 static int br_port_slave_changelink(struct net_device *brdev,
728 struct net_device *dev,
729 struct nlattr *tb[],
730 struct nlattr *data[])
731 {
732 struct net_bridge *br = netdev_priv(brdev);
733 int ret;
734
735 if (!data)
736 return 0;
737
738 spin_lock_bh(&br->lock);
739 ret = br_setport(br_port_get_rtnl(dev), data);
740 spin_unlock_bh(&br->lock);
741
742 return ret;
743 }
744
745 static int br_port_fill_slave_info(struct sk_buff *skb,
746 const struct net_device *brdev,
747 const struct net_device *dev)
748 {
749 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
750 }
751
752 static size_t br_port_get_slave_size(const struct net_device *brdev,
753 const struct net_device *dev)
754 {
755 return br_port_info_size();
756 }
757
758 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
759 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
760 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
761 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
762 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
763 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
764 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
765 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
766 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
767 };
768
769 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
770 struct nlattr *data[])
771 {
772 struct net_bridge *br = netdev_priv(brdev);
773 int err;
774
775 if (!data)
776 return 0;
777
778 if (data[IFLA_BR_FORWARD_DELAY]) {
779 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
780 if (err)
781 return err;
782 }
783
784 if (data[IFLA_BR_HELLO_TIME]) {
785 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
786 if (err)
787 return err;
788 }
789
790 if (data[IFLA_BR_MAX_AGE]) {
791 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
792 if (err)
793 return err;
794 }
795
796 if (data[IFLA_BR_AGEING_TIME]) {
797 u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]);
798
799 br->ageing_time = clock_t_to_jiffies(ageing_time);
800 }
801
802 if (data[IFLA_BR_STP_STATE]) {
803 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
804
805 br_stp_set_enabled(br, stp_enabled);
806 }
807
808 if (data[IFLA_BR_PRIORITY]) {
809 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
810
811 br_stp_set_bridge_priority(br, priority);
812 }
813
814 if (data[IFLA_BR_VLAN_FILTERING]) {
815 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
816
817 err = __br_vlan_filter_toggle(br, vlan_filter);
818 if (err)
819 return err;
820 }
821
822 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
823 if (data[IFLA_BR_VLAN_PROTOCOL]) {
824 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
825
826 err = __br_vlan_set_proto(br, vlan_proto);
827 if (err)
828 return err;
829 }
830 #endif
831
832 return 0;
833 }
834
835 static size_t br_get_size(const struct net_device *brdev)
836 {
837 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
838 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
839 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
840 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
841 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
842 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
843 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
844 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
845 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
846 #endif
847 0;
848 }
849
850 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
851 {
852 struct net_bridge *br = netdev_priv(brdev);
853 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
854 u32 hello_time = jiffies_to_clock_t(br->hello_time);
855 u32 age_time = jiffies_to_clock_t(br->max_age);
856 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
857 u32 stp_enabled = br->stp_enabled;
858 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
859 u8 vlan_enabled = br_vlan_enabled(br);
860
861 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
862 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
863 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
864 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
865 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
866 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
867 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled))
868 return -EMSGSIZE;
869
870 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
871 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto))
872 return -EMSGSIZE;
873 #endif
874
875 return 0;
876 }
877
878 static size_t br_get_link_af_size(const struct net_device *dev)
879 {
880 struct net_bridge_port *p;
881 struct net_bridge *br;
882 int num_vlans = 0;
883
884 if (br_port_exists(dev)) {
885 p = br_port_get_rtnl(dev);
886 num_vlans = br_get_num_vlan_infos(nbp_vlan_group(p),
887 RTEXT_FILTER_BRVLAN, 0);
888 } else if (dev->priv_flags & IFF_EBRIDGE) {
889 br = netdev_priv(dev);
890 num_vlans = br_get_num_vlan_infos(br_vlan_group(br),
891 RTEXT_FILTER_BRVLAN, 0);
892 }
893
894 /* Each VLAN is returned in bridge_vlan_info along with flags */
895 return num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
896 }
897
898 static struct rtnl_af_ops br_af_ops __read_mostly = {
899 .family = AF_BRIDGE,
900 .get_link_af_size = br_get_link_af_size,
901 };
902
903 struct rtnl_link_ops br_link_ops __read_mostly = {
904 .kind = "bridge",
905 .priv_size = sizeof(struct net_bridge),
906 .setup = br_dev_setup,
907 .maxtype = IFLA_BR_MAX,
908 .policy = br_policy,
909 .validate = br_validate,
910 .newlink = br_dev_newlink,
911 .changelink = br_changelink,
912 .dellink = br_dev_delete,
913 .get_size = br_get_size,
914 .fill_info = br_fill_info,
915
916 .slave_maxtype = IFLA_BRPORT_MAX,
917 .slave_policy = br_port_policy,
918 .slave_changelink = br_port_slave_changelink,
919 .get_slave_size = br_port_get_slave_size,
920 .fill_slave_info = br_port_fill_slave_info,
921 };
922
923 int __init br_netlink_init(void)
924 {
925 int err;
926
927 br_mdb_init();
928 rtnl_af_register(&br_af_ops);
929
930 err = rtnl_link_register(&br_link_ops);
931 if (err)
932 goto out_af;
933
934 return 0;
935
936 out_af:
937 rtnl_af_unregister(&br_af_ops);
938 br_mdb_uninit();
939 return err;
940 }
941
942 void br_netlink_fini(void)
943 {
944 br_mdb_uninit();
945 rtnl_af_unregister(&br_af_ops);
946 rtnl_link_unregister(&br_link_ops);
947 }
Linux kernel - Deliverables
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