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bridge: new function to pack vlans into ranges during gets
[deliverable/linux.git] / net / bridge / br_netlink.c
CommitLineData
11dc1f36
SH		 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>
5a0e3ad6 14#include <linux/slab.h>
bb900b27 15#include <linux/etherdevice.h>
32fe21c0 16#include <net/rtnetlink.h>
881d966b 17#include <net/net_namespace.h>
b854272b 18#include <net/sock.h>
407af329 19#include <uapi/linux/if_bridge.h>
bb900b27 20
11dc1f36 21#include "br_private.h"
b03b6dd5 22#include "br_private_stp.h"
11dc1f36 23
25c71c75 24static 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 */
a2e01a65 30 + nla_total_size(1) /* IFLA_BRPORT_GUARD */
1007dd1a 31 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
3da889b6 32 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
9ba18891 33 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
867a5943 34 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
25c71c75 35 + 0;
36}
37
339bf98f
TG		 38static inline size_t br_nlmsg_size(void)
39{
40 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
25c71c75 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
50static 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) ||
a2e01a65 58 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
1007dd1a 59 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
c2d3babf 60 nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
9ba18891 61 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
867a5943 62 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
95850116
KP		 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)))
25c71c75 65 return -EMSGSIZE;
66
67 return 0;
339bf98f
TG		 68}
69
36cd0ffb
RP		 70static 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
100nla_put_failure:
101 return -EMSGSIZE;
102}
103
104static 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;
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
139initvars:
140 vid_range_start = vid;
141 vid_range_end = vid;
142 vid_range_flags = flags;
143 }
144
145 /* Call it once more to send any left over vlans */
146 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
147 vid_range_end,
148 vid_range_flags);
149 if (err)
150 return err;
151
152 return 0;
153}
154
155static int br_fill_ifvlaninfo(struct sk_buff *skb,
156 const struct net_port_vlans *pv)
157{
158 struct bridge_vlan_info vinfo;
159 u16 pvid, vid;
160
161 pvid = br_get_pvid(pv);
162 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
163 vinfo.vid = vid;
164 vinfo.flags = 0;
165 if (vid == pvid)
166 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
167
168 if (test_bit(vid, pv->untagged_bitmap))
169 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
170
171 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
172 sizeof(vinfo), &vinfo))
173 goto nla_put_failure;
174 }
175
176 return 0;
177
178nla_put_failure:
179 return -EMSGSIZE;
180}
181
11dc1f36
SH		 182/*
183 * Create one netlink message for one interface
184 * Contains port and master info as well as carrier and bridge state.
185 */
6cbdceeb
VY		 186static int br_fill_ifinfo(struct sk_buff *skb,
187 const struct net_bridge_port *port,
188 u32 pid, u32 seq, int event, unsigned int flags,
189 u32 filter_mask, const struct net_device *dev)
11dc1f36 190{
6cbdceeb 191 const struct net_bridge *br;
74685962 192 struct ifinfomsg *hdr;
11dc1f36 193 struct nlmsghdr *nlh;
11dc1f36 194 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
11dc1f36 195
6cbdceeb
VY		 196 if (port)
197 br = port->br;
198 else
199 br = netdev_priv(dev);
200
28a16c97 201 br_debug(br, "br_fill_info event %d port %s master %s\n",
202 event, dev->name, br->dev->name);
11dc1f36 203
74685962
TG		 204 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
205 if (nlh == NULL)
26932566 206 return -EMSGSIZE;
11dc1f36 207
74685962
TG		 208 hdr = nlmsg_data(nlh);
209 hdr->ifi_family = AF_BRIDGE;
210 hdr->__ifi_pad = 0;
211 hdr->ifi_type = dev->type;
212 hdr->ifi_index = dev->ifindex;
213 hdr->ifi_flags = dev_get_flags(dev);
214 hdr->ifi_change = 0;
11dc1f36 215
2eb812e6
DM		 216 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
217 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
218 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
219 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
220 (dev->addr_len &&
221 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
222 (dev->ifindex != dev->iflink &&
25c71c75 223 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2eb812e6 224 goto nla_put_failure;
25c71c75 225
6cbdceeb 226 if (event == RTM_NEWLINK && port) {
25c71c75 227 struct nlattr *nest
228 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
229
230 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
231 goto nla_put_failure;
232 nla_nest_end(skb, nest);
233 }
234
6cbdceeb 235 /* Check if the VID information is requested */
36cd0ffb
RP		 236 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
237 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
6cbdceeb 238 const struct net_port_vlans *pv;
36cd0ffb
RP		 239 struct nlattr *af;
240 int err;
6cbdceeb
VY		 241
242 if (port)
243 pv = nbp_get_vlan_info(port);
244 else
245 pv = br_get_vlan_info(br);
246
ef40b7ef 247 if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID))
6cbdceeb
VY		 248 goto done;
249
250 af = nla_nest_start(skb, IFLA_AF_SPEC);
251 if (!af)
252 goto nla_put_failure;
253
36cd0ffb
RP		 254 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
255 err = br_fill_ifvlaninfo_compressed(skb, pv);
256 else
257 err = br_fill_ifvlaninfo(skb, pv);
258 if (err)
259 goto nla_put_failure;
6cbdceeb
VY		 260 nla_nest_end(skb, af);
261 }
262
263done:
74685962 264 return nlmsg_end(skb, nlh);
11dc1f36 265
74685962 266nla_put_failure:
26932566
PM		 267 nlmsg_cancel(skb, nlh);
268 return -EMSGSIZE;
11dc1f36
SH		 269}
270
271/*
272 * Notify listeners of a change in port information
273 */
274void br_ifinfo_notify(int event, struct net_bridge_port *port)
275{
407af329 276 struct net *net;
11dc1f36 277 struct sk_buff *skb;
280a306c 278 int err = -ENOBUFS;
11dc1f36 279
407af329
VY		 280 if (!port)
281 return;
282
283 net = dev_net(port->dev);
28a16c97 284 br_debug(port->br, "port %u(%s) event %d\n",
95c96174 285 (unsigned int)port->port_no, port->dev->name, event);
28a16c97 286
339bf98f 287 skb = nlmsg_new(br_nlmsg_size(), GFP_ATOMIC);
280a306c
TG		 288 if (skb == NULL)
289 goto errout;
290
6cbdceeb 291 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, 0, port->dev);
26932566
PM		 292 if (err < 0) {
293 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
294 WARN_ON(err == -EMSGSIZE);
295 kfree_skb(skb);
296 goto errout;
297 }
1ce85fe4
PNA		 298 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
299 return;
280a306c 300errout:
87e823b3 301 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
11dc1f36
SH		 302}
303
407af329 304
11dc1f36
SH		 305/*
306 * Dump information about all ports, in response to GETLINK
307 */
e5a55a89 308int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
6cbdceeb 309 struct net_device *dev, u32 filter_mask)
11dc1f36 310{
e5a55a89 311 int err = 0;
1fb1754a 312 struct net_bridge_port *port = br_port_get_rtnl(dev);
e5a55a89 313
36cd0ffb
RP		 314 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
315 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
e5a55a89 316 goto out;
11dc1f36 317
6cbdceeb
VY		 318 err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI,
319 filter_mask, dev);
e5a55a89
JF		 320out:
321 return err;
11dc1f36
SH		 322}
323
bdced7ef
RP		 324static 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}
407af329
VY		 357
358static int br_afspec(struct net_bridge *br,
359 struct net_bridge_port *p,
360 struct nlattr *af_spec,
361 int cmd)
362{
bdced7ef
RP		 363 struct bridge_vlan_info *vinfo_start = NULL;
364 struct bridge_vlan_info *vinfo = NULL;
365 struct nlattr *attr;
407af329 366 int err = 0;
bdced7ef 367 int rem;
407af329 368
bdced7ef
RP		 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 }
407af329 381
bdced7ef
RP		 382 if (vinfo_start) {
383 struct bridge_vlan_info tmp_vinfo;
384 int v;
407af329 385
bdced7ef
RP		 386 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
387 return -EINVAL;
407af329 388
bdced7ef
RP		 389 if (vinfo->vid <= vinfo_start->vid)
390 return -EINVAL;
391
392 memcpy(&tmp_vinfo, vinfo_start,
393 sizeof(struct bridge_vlan_info));
407af329 394
bdced7ef
RP		 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);
407af329
VY		 398 if (err)
399 break;
bdced7ef
RP		 400 }
401 vinfo_start = NULL;
402 } else {
403 err = br_vlan_info(br, p, cmd, vinfo);
407af329 404 }
bdced7ef
RP		 405 if (err)
406 break;
407af329
VY		 407 }
408
409 return err;
410}
411
3ac636b8 412static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
25c71c75 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 },
a2e01a65 417 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
1007dd1a 418 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
6f705d8c 419 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
9ba18891 420 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
867a5943 421 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
25c71c75 422};
423
424/* Change the state of the port and notify spanning tree */
425static 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
576eb625 434 /* if device is not up, change is not allowed
435 * if link is not present, only allowable state is disabled
436 */
25c71c75 437 if (!netif_running(p->dev) ||
576eb625 438 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
25c71c75 439 return -ENETDOWN;
440
775dd692 441 br_set_state(p, state);
25c71c75 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 */
448static 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 */
461static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
462{
463 int err;
e028e4b8 464 unsigned long old_flags = p->flags;
25c71c75 465
466 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
a2e01a65 467 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
c2d3babf 468 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
3d84fa98 469 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
9ba18891 470 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
867a5943 471 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
95850116 472 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
25c71c75 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 }
e028e4b8
VY		 491
492 br_port_flags_change(p, old_flags ^ p->flags);
25c71c75 493 return 0;
494}
495
496/* Change state and parameters on port. */
e5a55a89 497int br_setlink(struct net_device *dev, struct nlmsghdr *nlh)
11dc1f36 498{
74685962 499 struct nlattr *protinfo;
407af329 500 struct nlattr *afspec;
11dc1f36 501 struct net_bridge_port *p;
2062cc20 502 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
7b99a993 503 int err = 0;
11dc1f36 504
c60ee67f
H		 505 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
506 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
407af329 507 if (!protinfo && !afspec)
25c71c75 508 return 0;
11dc1f36 509
ec1e5610 510 p = br_port_get_rtnl(dev);
407af329 511 /* We want to accept dev as bridge itself if the AF_SPEC
8e3bff96 512 * is set to see if someone is setting vlan info on the bridge
407af329 513 */
7b99a993 514 if (!p && !afspec)
b5ed54e9 515 return -EINVAL;
11dc1f36 516
407af329
VY		 517 if (p && protinfo) {
518 if (protinfo->nla_type & NLA_F_NESTED) {
519 err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
3ac636b8 520 protinfo, br_port_policy);
407af329
VY		 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 {
8e3bff96 528 /* Binary compatibility with old RSTP */
407af329
VY		 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 }
25c71c75 536 if (err)
407af329
VY		 537 goto out;
538 }
11dc1f36 539
407af329
VY		 540 if (afspec) {
541 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
542 afspec, RTM_SETLINK);
25c71c75 543 }
b03b6dd5 544
25c71c75 545 if (err == 0)
546 br_ifinfo_notify(RTM_NEWLINK, p);
b03b6dd5 547
407af329 548out:
25c71c75 549 return err;
11dc1f36
SH		 550}
551
407af329
VY		 552/* Delete port information */
553int br_dellink(struct net_device *dev, struct nlmsghdr *nlh)
554{
407af329
VY		 555 struct nlattr *afspec;
556 struct net_bridge_port *p;
557 int err;
558
c60ee67f 559 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
407af329
VY		 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
571 return err;
572}
bb900b27 573static int br_validate(struct nlattr *tb[], struct nlattr *data[])
574{
575 if (tb[IFLA_ADDRESS]) {
576 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
577 return -EINVAL;
578 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
579 return -EADDRNOTAVAIL;
580 }
581
582 return 0;
583}
584
30313a3d
TM		 585static int br_dev_newlink(struct net *src_net, struct net_device *dev,
586 struct nlattr *tb[], struct nlattr *data[])
587{
588 struct net_bridge *br = netdev_priv(dev);
589
590 if (tb[IFLA_ADDRESS]) {
591 spin_lock_bh(&br->lock);
592 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
593 spin_unlock_bh(&br->lock);
594 }
595
596 return register_netdevice(dev);
597}
598
3ac636b8
JP		 599static int br_port_slave_changelink(struct net_device *brdev,
600 struct net_device *dev,
601 struct nlattr *tb[],
602 struct nlattr *data[])
603{
604 if (!data)
605 return 0;
606 return br_setport(br_port_get_rtnl(dev), data);
607}
608
ced8283f
JP		 609static int br_port_fill_slave_info(struct sk_buff *skb,
610 const struct net_device *brdev,
611 const struct net_device *dev)
612{
613 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
614}
615
616static size_t br_port_get_slave_size(const struct net_device *brdev,
617 const struct net_device *dev)
618{
619 return br_port_info_size();
620}
621
13323516
JP		 622static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
623 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
624 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
625 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
626};
627
628static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
629 struct nlattr *data[])
630{
631 struct net_bridge *br = netdev_priv(brdev);
632 int err;
633
634 if (!data)
635 return 0;
636
637 if (data[IFLA_BR_FORWARD_DELAY]) {
638 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
639 if (err)
640 return err;
641 }
642
643 if (data[IFLA_BR_HELLO_TIME]) {
644 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
645 if (err)
646 return err;
647 }
648
649 if (data[IFLA_BR_MAX_AGE]) {
650 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
651 if (err)
652 return err;
653 }
654
655 return 0;
656}
657
e5c3ea5c
JP		 658static size_t br_get_size(const struct net_device *brdev)
659{
660 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
661 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
662 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
663 0;
664}
665
666static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
667{
668 struct net_bridge *br = netdev_priv(brdev);
669 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
670 u32 hello_time = jiffies_to_clock_t(br->hello_time);
671 u32 age_time = jiffies_to_clock_t(br->max_age);
672
673 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
674 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
675 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time))
676 return -EMSGSIZE;
677
678 return 0;
679}
680
6cbdceeb
VY		 681static size_t br_get_link_af_size(const struct net_device *dev)
682{
683 struct net_port_vlans *pv;
684
685 if (br_port_exists(dev))
1fb1754a 686 pv = nbp_get_vlan_info(br_port_get_rtnl(dev));
6cbdceeb
VY		 687 else if (dev->priv_flags & IFF_EBRIDGE)
688 pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
689 else
690 return 0;
691
692 if (!pv)
693 return 0;
694
695 /* Each VLAN is returned in bridge_vlan_info along with flags */
696 return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
697}
698
15004cab 699static struct rtnl_af_ops br_af_ops = {
6cbdceeb
VY		 700 .family = AF_BRIDGE,
701 .get_link_af_size = br_get_link_af_size,
702};
703
149ddd83 704struct rtnl_link_ops br_link_ops __read_mostly = {
ced8283f
JP		 705 .kind = "bridge",
706 .priv_size = sizeof(struct net_bridge),
707 .setup = br_dev_setup,
13323516
JP		 708 .maxtype = IFLA_BRPORT_MAX,
709 .policy = br_policy,
ced8283f
JP		 710 .validate = br_validate,
711 .newlink = br_dev_newlink,
13323516 712 .changelink = br_changelink,
ced8283f 713 .dellink = br_dev_delete,
e5c3ea5c
JP		 714 .get_size = br_get_size,
715 .fill_info = br_fill_info,
3ac636b8
JP		 716
717 .slave_maxtype = IFLA_BRPORT_MAX,
718 .slave_policy = br_port_policy,
719 .slave_changelink = br_port_slave_changelink,
ced8283f
JP		 720 .get_slave_size = br_port_get_slave_size,
721 .fill_slave_info = br_port_fill_slave_info,
bb900b27 722};
11dc1f36 723
32fe21c0 724int __init br_netlink_init(void)
11dc1f36 725{
3ec8e9f0
VY		 726 int err;
727
728 br_mdb_init();
3678a9d8 729 rtnl_af_register(&br_af_ops);
3ec8e9f0 730
6cbdceeb
VY		 731 err = rtnl_link_register(&br_link_ops);
732 if (err)
733 goto out_af;
734
3ec8e9f0 735 return 0;
6cbdceeb
VY		 736
737out_af:
738 rtnl_af_unregister(&br_af_ops);
3ec8e9f0
VY		 739 br_mdb_uninit();
740 return err;
11dc1f36
SH		 741}
742
34666d46 743void br_netlink_fini(void)
11dc1f36 744{
3ec8e9f0 745 br_mdb_uninit();
6cbdceeb 746 rtnl_af_unregister(&br_af_ops);
bb900b27 747 rtnl_link_unregister(&br_link_ops);
11dc1f36 748}
Linux kernel - Deliverables
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