1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Bridge netlink control interface
4 *
5 * Authors:
6 * Stephen Hemminger <shemminger@osdl.org>
7 */
8
9 #include <linux/kernel.h>
10 #include <linux/slab.h>
11 #include <linux/etherdevice.h>
12 #include <net/rtnetlink.h>
13 #include <net/net_namespace.h>
14 #include <net/sock.h>
15 #include <uapi/linux/if_bridge.h>
16
17 #include "br_private.h"
18 #include "br_private_stp.h"
19 #include "br_private_tunnel.h"
20
__get_num_vlan_infos(struct net_bridge_vlan_group * vg,u32 filter_mask)21 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
22 u32 filter_mask)
23 {
24 struct net_bridge_vlan *v;
25 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
26 u16 flags, pvid;
27 int num_vlans = 0;
28
29 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
30 return 0;
31
32 pvid = br_get_pvid(vg);
33 /* Count number of vlan infos */
34 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
35 flags = 0;
36 /* only a context, bridge vlan not activated */
37 if (!br_vlan_should_use(v))
38 continue;
39 if (v->vid == pvid)
40 flags |= BRIDGE_VLAN_INFO_PVID;
41
42 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
43 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
44
45 if (vid_range_start == 0) {
46 goto initvars;
47 } else if ((v->vid - vid_range_end) == 1 &&
48 flags == vid_range_flags) {
49 vid_range_end = v->vid;
50 continue;
51 } else {
52 if ((vid_range_end - vid_range_start) > 0)
53 num_vlans += 2;
54 else
55 num_vlans += 1;
56 }
57 initvars:
58 vid_range_start = v->vid;
59 vid_range_end = v->vid;
60 vid_range_flags = flags;
61 }
62
63 if (vid_range_start != 0) {
64 if ((vid_range_end - vid_range_start) > 0)
65 num_vlans += 2;
66 else
67 num_vlans += 1;
68 }
69
70 return num_vlans;
71 }
72
br_get_num_vlan_infos(struct net_bridge_vlan_group * vg,u32 filter_mask)73 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
74 u32 filter_mask)
75 {
76 int num_vlans;
77
78 if (!vg)
79 return 0;
80
81 if (filter_mask & RTEXT_FILTER_BRVLAN)
82 return vg->num_vlans;
83
84 rcu_read_lock();
85 num_vlans = __get_num_vlan_infos(vg, filter_mask);
86 rcu_read_unlock();
87
88 return num_vlans;
89 }
90
br_get_link_af_size_filtered(const struct net_device * dev,u32 filter_mask)91 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
92 u32 filter_mask)
93 {
94 struct net_bridge_vlan_group *vg = NULL;
95 struct net_bridge_port *p = NULL;
96 struct net_bridge *br;
97 int num_vlan_infos;
98 size_t vinfo_sz = 0;
99
100 rcu_read_lock();
101 if (netif_is_bridge_port(dev)) {
102 p = br_port_get_rcu(dev);
103 vg = nbp_vlan_group_rcu(p);
104 } else if (dev->priv_flags & IFF_EBRIDGE) {
105 br = netdev_priv(dev);
106 vg = br_vlan_group_rcu(br);
107 }
108 num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
109 rcu_read_unlock();
110
111 if (p && (p->flags & BR_VLAN_TUNNEL))
112 vinfo_sz += br_get_vlan_tunnel_info_size(vg);
113
114 /* Each VLAN is returned in bridge_vlan_info along with flags */
115 vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
116
117 return vinfo_sz;
118 }
119
br_port_info_size(void)120 static inline size_t br_port_info_size(void)
121 {
122 return nla_total_size(1) /* IFLA_BRPORT_STATE */
123 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */
124 + nla_total_size(4) /* IFLA_BRPORT_COST */
125 + nla_total_size(1) /* IFLA_BRPORT_MODE */
126 + nla_total_size(1) /* IFLA_BRPORT_GUARD */
127 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
128 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
129 + nla_total_size(1) /* IFLA_BRPORT_MCAST_TO_UCAST */
130 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
131 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
132 + nla_total_size(1) /* IFLA_BRPORT_MCAST_FLOOD */
133 + nla_total_size(1) /* IFLA_BRPORT_BCAST_FLOOD */
134 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
135 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
136 + nla_total_size(1) /* IFLA_BRPORT_VLAN_TUNNEL */
137 + nla_total_size(1) /* IFLA_BRPORT_NEIGH_SUPPRESS */
138 + nla_total_size(1) /* IFLA_BRPORT_ISOLATED */
139 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
140 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
141 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */
142 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */
143 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */
144 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */
145 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
146 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */
147 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
148 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
149 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
150 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
151 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */
152 #endif
153 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_GROUP_FWD_MASK */
154 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MRP_RING_OPEN */
155 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MRP_IN_OPEN */
156 + 0;
157 }
158
br_nlmsg_size(struct net_device * dev,u32 filter_mask)159 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
160 {
161 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
162 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
163 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
164 + nla_total_size(4) /* IFLA_MASTER */
165 + nla_total_size(4) /* IFLA_MTU */
166 + nla_total_size(4) /* IFLA_LINK */
167 + nla_total_size(1) /* IFLA_OPERSTATE */
168 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
169 + nla_total_size(br_get_link_af_size_filtered(dev,
170 filter_mask)) /* IFLA_AF_SPEC */
171 + nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */
172 }
173
br_port_fill_attrs(struct sk_buff * skb,const struct net_bridge_port * p)174 static int br_port_fill_attrs(struct sk_buff *skb,
175 const struct net_bridge_port *p)
176 {
177 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
178 struct net_bridge_port *backup_p;
179 u64 timerval;
180
181 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
182 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
183 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
184 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
185 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
186 nla_put_u8(skb, IFLA_BRPORT_PROTECT,
187 !!(p->flags & BR_ROOT_BLOCK)) ||
188 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
189 !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
190 nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
191 !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
192 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
193 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
194 !!(p->flags & BR_FLOOD)) ||
195 nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
196 !!(p->flags & BR_MCAST_FLOOD)) ||
197 nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
198 !!(p->flags & BR_BCAST_FLOOD)) ||
199 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
200 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
201 !!(p->flags & BR_PROXYARP_WIFI)) ||
202 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
203 &p->designated_root) ||
204 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
205 &p->designated_bridge) ||
206 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
207 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
208 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
209 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
210 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
211 p->topology_change_ack) ||
212 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
213 nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
214 BR_VLAN_TUNNEL)) ||
215 nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
216 nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
217 !!(p->flags & BR_NEIGH_SUPPRESS)) ||
218 nla_put_u8(skb, IFLA_BRPORT_MRP_RING_OPEN, !!(p->flags &
219 BR_MRP_LOST_CONT)) ||
220 nla_put_u8(skb, IFLA_BRPORT_MRP_IN_OPEN,
221 !!(p->flags & BR_MRP_LOST_IN_CONT)) ||
222 nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)))
223 return -EMSGSIZE;
224
225 timerval = br_timer_value(&p->message_age_timer);
226 if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
227 IFLA_BRPORT_PAD))
228 return -EMSGSIZE;
229 timerval = br_timer_value(&p->forward_delay_timer);
230 if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
231 IFLA_BRPORT_PAD))
232 return -EMSGSIZE;
233 timerval = br_timer_value(&p->hold_timer);
234 if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
235 IFLA_BRPORT_PAD))
236 return -EMSGSIZE;
237
238 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
239 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
240 p->multicast_router))
241 return -EMSGSIZE;
242 #endif
243
244 /* we might be called only with br->lock */
245 rcu_read_lock();
246 backup_p = rcu_dereference(p->backup_port);
247 if (backup_p)
248 nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT,
249 backup_p->dev->ifindex);
250 rcu_read_unlock();
251
252 return 0;
253 }
254
br_fill_ifvlaninfo_range(struct sk_buff * skb,u16 vid_start,u16 vid_end,u16 flags)255 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
256 u16 vid_end, u16 flags)
257 {
258 struct bridge_vlan_info vinfo;
259
260 if ((vid_end - vid_start) > 0) {
261 /* add range to skb */
262 vinfo.vid = vid_start;
263 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
264 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
265 sizeof(vinfo), &vinfo))
266 goto nla_put_failure;
267
268 vinfo.vid = vid_end;
269 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
270 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
271 sizeof(vinfo), &vinfo))
272 goto nla_put_failure;
273 } else {
274 vinfo.vid = vid_start;
275 vinfo.flags = flags;
276 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
277 sizeof(vinfo), &vinfo))
278 goto nla_put_failure;
279 }
280
281 return 0;
282
283 nla_put_failure:
284 return -EMSGSIZE;
285 }
286
br_fill_ifvlaninfo_compressed(struct sk_buff * skb,struct net_bridge_vlan_group * vg)287 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
288 struct net_bridge_vlan_group *vg)
289 {
290 struct net_bridge_vlan *v;
291 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
292 u16 flags, pvid;
293 int err = 0;
294
295 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
296 * and mark vlan info with begin and end flags
297 * if vlaninfo represents a range
298 */
299 pvid = br_get_pvid(vg);
300 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
301 flags = 0;
302 if (!br_vlan_should_use(v))
303 continue;
304 if (v->vid == pvid)
305 flags |= BRIDGE_VLAN_INFO_PVID;
306
307 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
308 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
309
310 if (vid_range_start == 0) {
311 goto initvars;
312 } else if ((v->vid - vid_range_end) == 1 &&
313 flags == vid_range_flags) {
314 vid_range_end = v->vid;
315 continue;
316 } else {
317 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
318 vid_range_end,
319 vid_range_flags);
320 if (err)
321 return err;
322 }
323
324 initvars:
325 vid_range_start = v->vid;
326 vid_range_end = v->vid;
327 vid_range_flags = flags;
328 }
329
330 if (vid_range_start != 0) {
331 /* Call it once more to send any left over vlans */
332 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
333 vid_range_end,
334 vid_range_flags);
335 if (err)
336 return err;
337 }
338
339 return 0;
340 }
341
br_fill_ifvlaninfo(struct sk_buff * skb,struct net_bridge_vlan_group * vg)342 static int br_fill_ifvlaninfo(struct sk_buff *skb,
343 struct net_bridge_vlan_group *vg)
344 {
345 struct bridge_vlan_info vinfo;
346 struct net_bridge_vlan *v;
347 u16 pvid;
348
349 pvid = br_get_pvid(vg);
350 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
351 if (!br_vlan_should_use(v))
352 continue;
353
354 vinfo.vid = v->vid;
355 vinfo.flags = 0;
356 if (v->vid == pvid)
357 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
358
359 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
360 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
361
362 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
363 sizeof(vinfo), &vinfo))
364 goto nla_put_failure;
365 }
366
367 return 0;
368
369 nla_put_failure:
370 return -EMSGSIZE;
371 }
372
373 /*
374 * Create one netlink message for one interface
375 * Contains port and master info as well as carrier and bridge state.
376 */
br_fill_ifinfo(struct sk_buff * skb,const struct net_bridge_port * port,u32 pid,u32 seq,int event,unsigned int flags,u32 filter_mask,const struct net_device * dev)377 static int br_fill_ifinfo(struct sk_buff *skb,
378 const struct net_bridge_port *port,
379 u32 pid, u32 seq, int event, unsigned int flags,
380 u32 filter_mask, const struct net_device *dev)
381 {
382 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
383 struct nlattr *af = NULL;
384 struct net_bridge *br;
385 struct ifinfomsg *hdr;
386 struct nlmsghdr *nlh;
387
388 if (port)
389 br = port->br;
390 else
391 br = netdev_priv(dev);
392
393 br_debug(br, "br_fill_info event %d port %s master %s\n",
394 event, dev->name, br->dev->name);
395
396 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
397 if (nlh == NULL)
398 return -EMSGSIZE;
399
400 hdr = nlmsg_data(nlh);
401 hdr->ifi_family = AF_BRIDGE;
402 hdr->__ifi_pad = 0;
403 hdr->ifi_type = dev->type;
404 hdr->ifi_index = dev->ifindex;
405 hdr->ifi_flags = dev_get_flags(dev);
406 hdr->ifi_change = 0;
407
408 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
409 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
410 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
411 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
412 (dev->addr_len &&
413 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
414 (dev->ifindex != dev_get_iflink(dev) &&
415 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
416 goto nla_put_failure;
417
418 if (event == RTM_NEWLINK && port) {
419 struct nlattr *nest;
420
421 nest = nla_nest_start(skb, IFLA_PROTINFO);
422 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
423 goto nla_put_failure;
424 nla_nest_end(skb, nest);
425 }
426
427 if (filter_mask & (RTEXT_FILTER_BRVLAN |
428 RTEXT_FILTER_BRVLAN_COMPRESSED |
429 RTEXT_FILTER_MRP)) {
430 af = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
431 if (!af)
432 goto nla_put_failure;
433 }
434
435 /* Check if the VID information is requested */
436 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
437 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
438 struct net_bridge_vlan_group *vg;
439 int err;
440
441 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
442 rcu_read_lock();
443 if (port)
444 vg = nbp_vlan_group_rcu(port);
445 else
446 vg = br_vlan_group_rcu(br);
447
448 if (!vg || !vg->num_vlans) {
449 rcu_read_unlock();
450 goto done;
451 }
452 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
453 err = br_fill_ifvlaninfo_compressed(skb, vg);
454 else
455 err = br_fill_ifvlaninfo(skb, vg);
456
457 if (port && (port->flags & BR_VLAN_TUNNEL))
458 err = br_fill_vlan_tunnel_info(skb, vg);
459 rcu_read_unlock();
460 if (err)
461 goto nla_put_failure;
462 }
463
464 if (filter_mask & RTEXT_FILTER_MRP) {
465 int err;
466
467 if (!br_mrp_enabled(br) || port)
468 goto done;
469
470 rcu_read_lock();
471 err = br_mrp_fill_info(skb, br);
472 rcu_read_unlock();
473
474 if (err)
475 goto nla_put_failure;
476 }
477
478 done:
479 if (af)
480 nla_nest_end(skb, af);
481 nlmsg_end(skb, nlh);
482 return 0;
483
484 nla_put_failure:
485 nlmsg_cancel(skb, nlh);
486 return -EMSGSIZE;
487 }
488
489 /* Notify listeners of a change in bridge or port information */
br_ifinfo_notify(int event,const struct net_bridge * br,const struct net_bridge_port * port)490 void br_ifinfo_notify(int event, const struct net_bridge *br,
491 const struct net_bridge_port *port)
492 {
493 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
494 struct net_device *dev;
495 struct sk_buff *skb;
496 int err = -ENOBUFS;
497 struct net *net;
498 u16 port_no = 0;
499
500 if (WARN_ON(!port && !br))
501 return;
502
503 if (port) {
504 dev = port->dev;
505 br = port->br;
506 port_no = port->port_no;
507 } else {
508 dev = br->dev;
509 }
510
511 net = dev_net(dev);
512 br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
513
514 skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
515 if (skb == NULL)
516 goto errout;
517
518 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev);
519 if (err < 0) {
520 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
521 WARN_ON(err == -EMSGSIZE);
522 kfree_skb(skb);
523 goto errout;
524 }
525 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
526 return;
527 errout:
528 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
529 }
530
531 /*
532 * Dump information about all ports, in response to GETLINK
533 */
br_getlink(struct sk_buff * skb,u32 pid,u32 seq,struct net_device * dev,u32 filter_mask,int nlflags)534 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
535 struct net_device *dev, u32 filter_mask, int nlflags)
536 {
537 struct net_bridge_port *port = br_port_get_rtnl(dev);
538
539 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
540 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) &&
541 !(filter_mask & RTEXT_FILTER_MRP))
542 return 0;
543
544 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
545 filter_mask, dev);
546 }
547
br_vlan_info(struct net_bridge * br,struct net_bridge_port * p,int cmd,struct bridge_vlan_info * vinfo,bool * changed,struct netlink_ext_ack * extack)548 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
549 int cmd, struct bridge_vlan_info *vinfo, bool *changed,
550 struct netlink_ext_ack *extack)
551 {
552 bool curr_change;
553 int err = 0;
554
555 switch (cmd) {
556 case RTM_SETLINK:
557 if (p) {
558 /* if the MASTER flag is set this will act on the global
559 * per-VLAN entry as well
560 */
561 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
562 &curr_change, extack);
563 } else {
564 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
565 err = br_vlan_add(br, vinfo->vid, vinfo->flags,
566 &curr_change, extack);
567 }
568 if (curr_change)
569 *changed = true;
570 break;
571
572 case RTM_DELLINK:
573 if (p) {
574 if (!nbp_vlan_delete(p, vinfo->vid))
575 *changed = true;
576
577 if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
578 !br_vlan_delete(p->br, vinfo->vid))
579 *changed = true;
580 } else if (!br_vlan_delete(br, vinfo->vid)) {
581 *changed = true;
582 }
583 break;
584 }
585
586 return err;
587 }
588
br_process_vlan_info(struct net_bridge * br,struct net_bridge_port * p,int cmd,struct bridge_vlan_info * vinfo_curr,struct bridge_vlan_info ** vinfo_last,bool * changed,struct netlink_ext_ack * extack)589 int br_process_vlan_info(struct net_bridge *br,
590 struct net_bridge_port *p, int cmd,
591 struct bridge_vlan_info *vinfo_curr,
592 struct bridge_vlan_info **vinfo_last,
593 bool *changed,
594 struct netlink_ext_ack *extack)
595 {
596 int err, rtm_cmd;
597
598 if (!br_vlan_valid_id(vinfo_curr->vid, extack))
599 return -EINVAL;
600
601 /* needed for vlan-only NEWVLAN/DELVLAN notifications */
602 rtm_cmd = br_afspec_cmd_to_rtm(cmd);
603
604 if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
605 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
606 return -EINVAL;
607 *vinfo_last = vinfo_curr;
608 return 0;
609 }
610
611 if (*vinfo_last) {
612 struct bridge_vlan_info tmp_vinfo;
613 int v, v_change_start = 0;
614
615 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
616 return -EINVAL;
617
618 memcpy(&tmp_vinfo, *vinfo_last,
619 sizeof(struct bridge_vlan_info));
620 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
621 bool curr_change = false;
622
623 tmp_vinfo.vid = v;
624 err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change,
625 extack);
626 if (err)
627 break;
628 if (curr_change) {
629 *changed = curr_change;
630 if (!v_change_start)
631 v_change_start = v;
632 } else {
633 /* nothing to notify yet */
634 if (!v_change_start)
635 continue;
636 br_vlan_notify(br, p, v_change_start,
637 v - 1, rtm_cmd);
638 v_change_start = 0;
639 }
640 cond_resched();
641 }
642 /* v_change_start is set only if the last/whole range changed */
643 if (v_change_start)
644 br_vlan_notify(br, p, v_change_start,
645 v - 1, rtm_cmd);
646
647 *vinfo_last = NULL;
648
649 return err;
650 }
651
652 err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
653 if (*changed)
654 br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd);
655
656 return err;
657 }
658
br_afspec(struct net_bridge * br,struct net_bridge_port * p,struct nlattr * af_spec,int cmd,bool * changed,struct netlink_ext_ack * extack)659 static int br_afspec(struct net_bridge *br,
660 struct net_bridge_port *p,
661 struct nlattr *af_spec,
662 int cmd, bool *changed,
663 struct netlink_ext_ack *extack)
664 {
665 struct bridge_vlan_info *vinfo_curr = NULL;
666 struct bridge_vlan_info *vinfo_last = NULL;
667 struct nlattr *attr;
668 struct vtunnel_info tinfo_last = {};
669 struct vtunnel_info tinfo_curr = {};
670 int err = 0, rem;
671
672 nla_for_each_nested(attr, af_spec, rem) {
673 err = 0;
674 switch (nla_type(attr)) {
675 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
676 if (!p || !(p->flags & BR_VLAN_TUNNEL))
677 return -EINVAL;
678 err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
679 if (err)
680 return err;
681 err = br_process_vlan_tunnel_info(br, p, cmd,
682 &tinfo_curr,
683 &tinfo_last,
684 changed);
685 if (err)
686 return err;
687 break;
688 case IFLA_BRIDGE_VLAN_INFO:
689 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
690 return -EINVAL;
691 vinfo_curr = nla_data(attr);
692 err = br_process_vlan_info(br, p, cmd, vinfo_curr,
693 &vinfo_last, changed,
694 extack);
695 if (err)
696 return err;
697 break;
698 case IFLA_BRIDGE_MRP:
699 err = br_mrp_parse(br, p, attr, cmd, extack);
700 if (err)
701 return err;
702 break;
703 }
704 }
705
706 return err;
707 }
708
709 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
710 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
711 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
712 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
713 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
714 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
715 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
716 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
717 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
718 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
719 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
720 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
721 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
722 [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
723 [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
724 [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
725 [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
726 [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
727 [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
728 [IFLA_BRPORT_ISOLATED] = { .type = NLA_U8 },
729 [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
730 };
731
732 /* Change the state of the port and notify spanning tree */
br_set_port_state(struct net_bridge_port * p,u8 state)733 static int br_set_port_state(struct net_bridge_port *p, u8 state)
734 {
735 if (state > BR_STATE_BLOCKING)
736 return -EINVAL;
737
738 /* if kernel STP is running, don't allow changes */
739 if (p->br->stp_enabled == BR_KERNEL_STP)
740 return -EBUSY;
741
742 /* if device is not up, change is not allowed
743 * if link is not present, only allowable state is disabled
744 */
745 if (!netif_running(p->dev) ||
746 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
747 return -ENETDOWN;
748
749 br_set_state(p, state);
750 br_port_state_selection(p->br);
751 return 0;
752 }
753
754 /* Set/clear or port flags based on attribute */
br_set_port_flag(struct net_bridge_port * p,struct nlattr * tb[],int attrtype,unsigned long mask)755 static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
756 int attrtype, unsigned long mask)
757 {
758 unsigned long flags;
759 int err;
760
761 if (!tb[attrtype])
762 return 0;
763
764 if (nla_get_u8(tb[attrtype]))
765 flags = p->flags | mask;
766 else
767 flags = p->flags & ~mask;
768
769 err = br_switchdev_set_port_flag(p, flags, mask);
770 if (err)
771 return err;
772
773 p->flags = flags;
774 return 0;
775 }
776
777 /* Process bridge protocol info on port */
br_setport(struct net_bridge_port * p,struct nlattr * tb[])778 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
779 {
780 unsigned long old_flags = p->flags;
781 bool br_vlan_tunnel_old = false;
782 int err;
783
784 err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
785 if (err)
786 return err;
787
788 err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
789 if (err)
790 return err;
791
792 err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
793 if (err)
794 return err;
795
796 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
797 if (err)
798 return err;
799
800 err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
801 if (err)
802 return err;
803
804 err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
805 if (err)
806 return err;
807
808 err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
809 if (err)
810 return err;
811
812 err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
813 if (err)
814 return err;
815
816 err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
817 if (err)
818 return err;
819
820 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
821 if (err)
822 return err;
823
824 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
825 if (err)
826 return err;
827
828 br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
829 err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
830 if (err)
831 return err;
832
833 if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
834 nbp_vlan_tunnel_info_flush(p);
835
836 if (tb[IFLA_BRPORT_COST]) {
837 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
838 if (err)
839 return err;
840 }
841
842 if (tb[IFLA_BRPORT_PRIORITY]) {
843 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
844 if (err)
845 return err;
846 }
847
848 if (tb[IFLA_BRPORT_STATE]) {
849 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
850 if (err)
851 return err;
852 }
853
854 if (tb[IFLA_BRPORT_FLUSH])
855 br_fdb_delete_by_port(p->br, p, 0, 0);
856
857 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
858 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
859 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
860
861 err = br_multicast_set_port_router(p, mcast_router);
862 if (err)
863 return err;
864 }
865 #endif
866
867 if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
868 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
869
870 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
871 return -EINVAL;
872 p->group_fwd_mask = fwd_mask;
873 }
874
875 err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
876 BR_NEIGH_SUPPRESS);
877 if (err)
878 return err;
879
880 err = br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
881 if (err)
882 return err;
883
884 if (tb[IFLA_BRPORT_BACKUP_PORT]) {
885 struct net_device *backup_dev = NULL;
886 u32 backup_ifindex;
887
888 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
889 if (backup_ifindex) {
890 backup_dev = __dev_get_by_index(dev_net(p->dev),
891 backup_ifindex);
892 if (!backup_dev)
893 return -ENOENT;
894 }
895
896 err = nbp_backup_change(p, backup_dev);
897 if (err)
898 return err;
899 }
900
901 br_port_flags_change(p, old_flags ^ p->flags);
902 return 0;
903 }
904
905 /* Change state and parameters on port. */
br_setlink(struct net_device * dev,struct nlmsghdr * nlh,u16 flags,struct netlink_ext_ack * extack)906 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags,
907 struct netlink_ext_ack *extack)
908 {
909 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
910 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
911 struct net_bridge_port *p;
912 struct nlattr *protinfo;
913 struct nlattr *afspec;
914 bool changed = false;
915 int err = 0;
916
917 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
918 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
919 if (!protinfo && !afspec)
920 return 0;
921
922 p = br_port_get_rtnl(dev);
923 /* We want to accept dev as bridge itself if the AF_SPEC
924 * is set to see if someone is setting vlan info on the bridge
925 */
926 if (!p && !afspec)
927 return -EINVAL;
928
929 if (p && protinfo) {
930 if (protinfo->nla_type & NLA_F_NESTED) {
931 err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX,
932 protinfo,
933 br_port_policy,
934 NULL);
935 if (err)
936 return err;
937
938 spin_lock_bh(&p->br->lock);
939 err = br_setport(p, tb);
940 spin_unlock_bh(&p->br->lock);
941 } else {
942 /* Binary compatibility with old RSTP */
943 if (nla_len(protinfo) < sizeof(u8))
944 return -EINVAL;
945
946 spin_lock_bh(&p->br->lock);
947 err = br_set_port_state(p, nla_get_u8(protinfo));
948 spin_unlock_bh(&p->br->lock);
949 }
950 if (err)
951 goto out;
952 changed = true;
953 }
954
955 if (afspec)
956 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
957
958 if (changed)
959 br_ifinfo_notify(RTM_NEWLINK, br, p);
960 out:
961 return err;
962 }
963
964 /* Delete port information */
br_dellink(struct net_device * dev,struct nlmsghdr * nlh,u16 flags)965 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
966 {
967 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
968 struct net_bridge_port *p;
969 struct nlattr *afspec;
970 bool changed = false;
971 int err = 0;
972
973 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
974 if (!afspec)
975 return 0;
976
977 p = br_port_get_rtnl(dev);
978 /* We want to accept dev as bridge itself as well */
979 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
980 return -EINVAL;
981
982 err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL);
983 if (changed)
984 /* Send RTM_NEWLINK because userspace
985 * expects RTM_NEWLINK for vlan dels
986 */
987 br_ifinfo_notify(RTM_NEWLINK, br, p);
988
989 return err;
990 }
991
br_validate(struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)992 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
993 struct netlink_ext_ack *extack)
994 {
995 if (tb[IFLA_ADDRESS]) {
996 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
997 return -EINVAL;
998 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
999 return -EADDRNOTAVAIL;
1000 }
1001
1002 if (!data)
1003 return 0;
1004
1005 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1006 if (data[IFLA_BR_VLAN_PROTOCOL]) {
1007 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
1008 case htons(ETH_P_8021Q):
1009 case htons(ETH_P_8021AD):
1010 break;
1011 default:
1012 return -EPROTONOSUPPORT;
1013 }
1014 }
1015
1016 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1017 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1018
1019 if (defpvid >= VLAN_VID_MASK)
1020 return -EINVAL;
1021 }
1022 #endif
1023
1024 return 0;
1025 }
1026
br_port_slave_changelink(struct net_device * brdev,struct net_device * dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)1027 static int br_port_slave_changelink(struct net_device *brdev,
1028 struct net_device *dev,
1029 struct nlattr *tb[],
1030 struct nlattr *data[],
1031 struct netlink_ext_ack *extack)
1032 {
1033 struct net_bridge *br = netdev_priv(brdev);
1034 int ret;
1035
1036 if (!data)
1037 return 0;
1038
1039 spin_lock_bh(&br->lock);
1040 ret = br_setport(br_port_get_rtnl(dev), data);
1041 spin_unlock_bh(&br->lock);
1042
1043 return ret;
1044 }
1045
br_port_fill_slave_info(struct sk_buff * skb,const struct net_device * brdev,const struct net_device * dev)1046 static int br_port_fill_slave_info(struct sk_buff *skb,
1047 const struct net_device *brdev,
1048 const struct net_device *dev)
1049 {
1050 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
1051 }
1052
br_port_get_slave_size(const struct net_device * brdev,const struct net_device * dev)1053 static size_t br_port_get_slave_size(const struct net_device *brdev,
1054 const struct net_device *dev)
1055 {
1056 return br_port_info_size();
1057 }
1058
1059 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1060 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1061 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
1062 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
1063 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1064 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1065 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1066 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1067 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1068 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1069 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1070 .len = ETH_ALEN },
1071 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1072 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1073 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1074 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1075 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1076 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1077 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1078 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1079 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1080 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1081 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1082 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1083 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1084 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1085 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1086 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1087 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1088 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1089 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1090 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1091 [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1092 [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1093 [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1094 [IFLA_BR_MULTI_BOOLOPT] =
1095 NLA_POLICY_EXACT_LEN(sizeof(struct br_boolopt_multi)),
1096 };
1097
br_changelink(struct net_device * brdev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)1098 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1099 struct nlattr *data[],
1100 struct netlink_ext_ack *extack)
1101 {
1102 struct net_bridge *br = netdev_priv(brdev);
1103 int err;
1104
1105 if (!data)
1106 return 0;
1107
1108 if (data[IFLA_BR_FORWARD_DELAY]) {
1109 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1110 if (err)
1111 return err;
1112 }
1113
1114 if (data[IFLA_BR_HELLO_TIME]) {
1115 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1116 if (err)
1117 return err;
1118 }
1119
1120 if (data[IFLA_BR_MAX_AGE]) {
1121 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1122 if (err)
1123 return err;
1124 }
1125
1126 if (data[IFLA_BR_AGEING_TIME]) {
1127 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1128 if (err)
1129 return err;
1130 }
1131
1132 if (data[IFLA_BR_STP_STATE]) {
1133 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1134
1135 err = br_stp_set_enabled(br, stp_enabled, extack);
1136 if (err)
1137 return err;
1138 }
1139
1140 if (data[IFLA_BR_PRIORITY]) {
1141 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1142
1143 br_stp_set_bridge_priority(br, priority);
1144 }
1145
1146 if (data[IFLA_BR_VLAN_FILTERING]) {
1147 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1148
1149 err = __br_vlan_filter_toggle(br, vlan_filter);
1150 if (err)
1151 return err;
1152 }
1153
1154 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1155 if (data[IFLA_BR_VLAN_PROTOCOL]) {
1156 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1157
1158 err = __br_vlan_set_proto(br, vlan_proto);
1159 if (err)
1160 return err;
1161 }
1162
1163 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1164 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1165
1166 err = __br_vlan_set_default_pvid(br, defpvid, extack);
1167 if (err)
1168 return err;
1169 }
1170
1171 if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1172 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1173
1174 err = br_vlan_set_stats(br, vlan_stats);
1175 if (err)
1176 return err;
1177 }
1178
1179 if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1180 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1181
1182 err = br_vlan_set_stats_per_port(br, per_port);
1183 if (err)
1184 return err;
1185 }
1186 #endif
1187
1188 if (data[IFLA_BR_GROUP_FWD_MASK]) {
1189 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1190
1191 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1192 return -EINVAL;
1193 br->group_fwd_mask = fwd_mask;
1194 }
1195
1196 if (data[IFLA_BR_GROUP_ADDR]) {
1197 u8 new_addr[ETH_ALEN];
1198
1199 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1200 return -EINVAL;
1201 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1202 if (!is_link_local_ether_addr(new_addr))
1203 return -EINVAL;
1204 if (new_addr[5] == 1 || /* 802.3x Pause address */
1205 new_addr[5] == 2 || /* 802.3ad Slow protocols */
1206 new_addr[5] == 3) /* 802.1X PAE address */
1207 return -EINVAL;
1208 spin_lock_bh(&br->lock);
1209 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1210 spin_unlock_bh(&br->lock);
1211 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1212 br_recalculate_fwd_mask(br);
1213 }
1214
1215 if (data[IFLA_BR_FDB_FLUSH])
1216 br_fdb_flush(br);
1217
1218 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1219 if (data[IFLA_BR_MCAST_ROUTER]) {
1220 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1221
1222 err = br_multicast_set_router(br, multicast_router);
1223 if (err)
1224 return err;
1225 }
1226
1227 if (data[IFLA_BR_MCAST_SNOOPING]) {
1228 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1229
1230 br_multicast_toggle(br, mcast_snooping);
1231 }
1232
1233 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1234 u8 val;
1235
1236 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1237 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1238 }
1239
1240 if (data[IFLA_BR_MCAST_QUERIER]) {
1241 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1242
1243 err = br_multicast_set_querier(br, mcast_querier);
1244 if (err)
1245 return err;
1246 }
1247
1248 if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
1249 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
1250 RHT_ELASTICITY);
1251
1252 if (data[IFLA_BR_MCAST_HASH_MAX])
1253 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1254
1255 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1256 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1257
1258 br->multicast_last_member_count = val;
1259 }
1260
1261 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1262 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1263
1264 br->multicast_startup_query_count = val;
1265 }
1266
1267 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1268 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1269
1270 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1271 }
1272
1273 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1274 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1275
1276 br->multicast_membership_interval = clock_t_to_jiffies(val);
1277 }
1278
1279 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1280 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1281
1282 br->multicast_querier_interval = clock_t_to_jiffies(val);
1283 }
1284
1285 if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1286 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1287
1288 br->multicast_query_interval = clock_t_to_jiffies(val);
1289 }
1290
1291 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1292 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1293
1294 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1295 }
1296
1297 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1298 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1299
1300 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1301 }
1302
1303 if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1304 __u8 mcast_stats;
1305
1306 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1307 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1308 }
1309
1310 if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1311 __u8 igmp_version;
1312
1313 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1314 err = br_multicast_set_igmp_version(br, igmp_version);
1315 if (err)
1316 return err;
1317 }
1318
1319 #if IS_ENABLED(CONFIG_IPV6)
1320 if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1321 __u8 mld_version;
1322
1323 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1324 err = br_multicast_set_mld_version(br, mld_version);
1325 if (err)
1326 return err;
1327 }
1328 #endif
1329 #endif
1330 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1331 if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1332 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1333
1334 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1335 }
1336
1337 if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1338 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1339
1340 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1341 }
1342
1343 if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1344 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1345
1346 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1347 }
1348 #endif
1349
1350 if (data[IFLA_BR_MULTI_BOOLOPT]) {
1351 struct br_boolopt_multi *bm;
1352
1353 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
1354 err = br_boolopt_multi_toggle(br, bm, extack);
1355 if (err)
1356 return err;
1357 }
1358
1359 return 0;
1360 }
1361
br_dev_newlink(struct net * src_net,struct net_device * dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)1362 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1363 struct nlattr *tb[], struct nlattr *data[],
1364 struct netlink_ext_ack *extack)
1365 {
1366 struct net_bridge *br = netdev_priv(dev);
1367 int err;
1368
1369 err = register_netdevice(dev);
1370 if (err)
1371 return err;
1372
1373 if (tb[IFLA_ADDRESS]) {
1374 spin_lock_bh(&br->lock);
1375 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1376 spin_unlock_bh(&br->lock);
1377 }
1378
1379 err = br_changelink(dev, tb, data, extack);
1380 if (err)
1381 br_dev_delete(dev, NULL);
1382
1383 return err;
1384 }
1385
br_get_size(const struct net_device * brdev)1386 static size_t br_get_size(const struct net_device *brdev)
1387 {
1388 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
1389 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
1390 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
1391 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
1392 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
1393 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
1394 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
1395 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1396 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1397 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */
1398 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */
1399 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_PER_PORT */
1400 #endif
1401 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
1402 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */
1403 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */
1404 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */
1405 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */
1406 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */
1407 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1408 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1409 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1410 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1411 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1412 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
1413 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1414 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */
1415 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */
1416 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1417 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */
1418 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */
1419 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */
1420 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */
1421 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1422 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1423 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1424 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1425 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1426 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1427 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1428 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1429 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */
1430 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */
1431 #endif
1432 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1433 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */
1434 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */
1435 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */
1436 #endif
1437 nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
1438 0;
1439 }
1440
br_fill_info(struct sk_buff * skb,const struct net_device * brdev)1441 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1442 {
1443 struct net_bridge *br = netdev_priv(brdev);
1444 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1445 u32 hello_time = jiffies_to_clock_t(br->hello_time);
1446 u32 age_time = jiffies_to_clock_t(br->max_age);
1447 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1448 u32 stp_enabled = br->stp_enabled;
1449 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1450 u8 vlan_enabled = br_vlan_enabled(br->dev);
1451 struct br_boolopt_multi bm;
1452 u64 clockval;
1453
1454 clockval = br_timer_value(&br->hello_timer);
1455 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1456 return -EMSGSIZE;
1457 clockval = br_timer_value(&br->tcn_timer);
1458 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1459 return -EMSGSIZE;
1460 clockval = br_timer_value(&br->topology_change_timer);
1461 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1462 IFLA_BR_PAD))
1463 return -EMSGSIZE;
1464 clockval = br_timer_value(&br->gc_work.timer);
1465 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1466 return -EMSGSIZE;
1467
1468 br_boolopt_multi_get(br, &bm);
1469 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1470 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1471 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1472 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1473 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1474 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1475 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1476 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1477 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1478 &br->bridge_id) ||
1479 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1480 &br->designated_root) ||
1481 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1482 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1483 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1484 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1485 br->topology_change_detected) ||
1486 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
1487 nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
1488 return -EMSGSIZE;
1489
1490 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1491 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1492 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1493 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1494 br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1495 nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1496 br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)))
1497 return -EMSGSIZE;
1498 #endif
1499 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1500 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1501 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1502 br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1503 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1504 br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1505 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1506 br_opt_get(br, BROPT_MULTICAST_QUERIER)) ||
1507 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1508 br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1509 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
1510 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1511 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1512 br->multicast_last_member_count) ||
1513 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1514 br->multicast_startup_query_count) ||
1515 nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1516 br->multicast_igmp_version))
1517 return -EMSGSIZE;
1518 #if IS_ENABLED(CONFIG_IPV6)
1519 if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1520 br->multicast_mld_version))
1521 return -EMSGSIZE;
1522 #endif
1523 clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1524 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1525 IFLA_BR_PAD))
1526 return -EMSGSIZE;
1527 clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1528 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1529 IFLA_BR_PAD))
1530 return -EMSGSIZE;
1531 clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1532 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1533 IFLA_BR_PAD))
1534 return -EMSGSIZE;
1535 clockval = jiffies_to_clock_t(br->multicast_query_interval);
1536 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1537 IFLA_BR_PAD))
1538 return -EMSGSIZE;
1539 clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1540 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1541 IFLA_BR_PAD))
1542 return -EMSGSIZE;
1543 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1544 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1545 IFLA_BR_PAD))
1546 return -EMSGSIZE;
1547 #endif
1548 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1549 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1550 br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1551 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1552 br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1553 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1554 br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1555 return -EMSGSIZE;
1556 #endif
1557
1558 return 0;
1559 }
1560
br_get_linkxstats_size(const struct net_device * dev,int attr)1561 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1562 {
1563 struct net_bridge_port *p = NULL;
1564 struct net_bridge_vlan_group *vg;
1565 struct net_bridge_vlan *v;
1566 struct net_bridge *br;
1567 int numvls = 0;
1568
1569 switch (attr) {
1570 case IFLA_STATS_LINK_XSTATS:
1571 br = netdev_priv(dev);
1572 vg = br_vlan_group(br);
1573 break;
1574 case IFLA_STATS_LINK_XSTATS_SLAVE:
1575 p = br_port_get_rtnl(dev);
1576 if (!p)
1577 return 0;
1578 br = p->br;
1579 vg = nbp_vlan_group(p);
1580 break;
1581 default:
1582 return 0;
1583 }
1584
1585 if (vg) {
1586 /* we need to count all, even placeholder entries */
1587 list_for_each_entry(v, &vg->vlan_list, vlist)
1588 numvls++;
1589 }
1590
1591 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1592 nla_total_size(sizeof(struct br_mcast_stats)) +
1593 nla_total_size(0);
1594 }
1595
br_fill_linkxstats(struct sk_buff * skb,const struct net_device * dev,int * prividx,int attr)1596 static int br_fill_linkxstats(struct sk_buff *skb,
1597 const struct net_device *dev,
1598 int *prividx, int attr)
1599 {
1600 struct nlattr *nla __maybe_unused;
1601 struct net_bridge_port *p = NULL;
1602 struct net_bridge_vlan_group *vg;
1603 struct net_bridge_vlan *v;
1604 struct net_bridge *br;
1605 struct nlattr *nest;
1606 int vl_idx = 0;
1607
1608 switch (attr) {
1609 case IFLA_STATS_LINK_XSTATS:
1610 br = netdev_priv(dev);
1611 vg = br_vlan_group(br);
1612 break;
1613 case IFLA_STATS_LINK_XSTATS_SLAVE:
1614 p = br_port_get_rtnl(dev);
1615 if (!p)
1616 return 0;
1617 br = p->br;
1618 vg = nbp_vlan_group(p);
1619 break;
1620 default:
1621 return -EINVAL;
1622 }
1623
1624 nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE);
1625 if (!nest)
1626 return -EMSGSIZE;
1627
1628 if (vg) {
1629 u16 pvid;
1630
1631 pvid = br_get_pvid(vg);
1632 list_for_each_entry(v, &vg->vlan_list, vlist) {
1633 struct bridge_vlan_xstats vxi;
1634 struct br_vlan_stats stats;
1635
1636 if (++vl_idx < *prividx)
1637 continue;
1638 memset(&vxi, 0, sizeof(vxi));
1639 vxi.vid = v->vid;
1640 vxi.flags = v->flags;
1641 if (v->vid == pvid)
1642 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1643 br_vlan_get_stats(v, &stats);
1644 vxi.rx_bytes = stats.rx_bytes;
1645 vxi.rx_packets = stats.rx_packets;
1646 vxi.tx_bytes = stats.tx_bytes;
1647 vxi.tx_packets = stats.tx_packets;
1648
1649 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1650 goto nla_put_failure;
1651 }
1652 }
1653
1654 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1655 if (++vl_idx >= *prividx) {
1656 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1657 sizeof(struct br_mcast_stats),
1658 BRIDGE_XSTATS_PAD);
1659 if (!nla)
1660 goto nla_put_failure;
1661 br_multicast_get_stats(br, p, nla_data(nla));
1662 }
1663 #endif
1664
1665 if (p) {
1666 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP,
1667 sizeof(p->stp_xstats),
1668 BRIDGE_XSTATS_PAD);
1669 if (!nla)
1670 goto nla_put_failure;
1671
1672 spin_lock_bh(&br->lock);
1673 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats));
1674 spin_unlock_bh(&br->lock);
1675 }
1676
1677 nla_nest_end(skb, nest);
1678 *prividx = 0;
1679
1680 return 0;
1681
1682 nla_put_failure:
1683 nla_nest_end(skb, nest);
1684 *prividx = vl_idx;
1685
1686 return -EMSGSIZE;
1687 }
1688
1689 static struct rtnl_af_ops br_af_ops __read_mostly = {
1690 .family = AF_BRIDGE,
1691 .get_link_af_size = br_get_link_af_size_filtered,
1692 };
1693
1694 struct rtnl_link_ops br_link_ops __read_mostly = {
1695 .kind = "bridge",
1696 .priv_size = sizeof(struct net_bridge),
1697 .setup = br_dev_setup,
1698 .maxtype = IFLA_BR_MAX,
1699 .policy = br_policy,
1700 .validate = br_validate,
1701 .newlink = br_dev_newlink,
1702 .changelink = br_changelink,
1703 .dellink = br_dev_delete,
1704 .get_size = br_get_size,
1705 .fill_info = br_fill_info,
1706 .fill_linkxstats = br_fill_linkxstats,
1707 .get_linkxstats_size = br_get_linkxstats_size,
1708
1709 .slave_maxtype = IFLA_BRPORT_MAX,
1710 .slave_policy = br_port_policy,
1711 .slave_changelink = br_port_slave_changelink,
1712 .get_slave_size = br_port_get_slave_size,
1713 .fill_slave_info = br_port_fill_slave_info,
1714 };
1715
br_netlink_init(void)1716 int __init br_netlink_init(void)
1717 {
1718 int err;
1719
1720 br_mdb_init();
1721 br_vlan_rtnl_init();
1722 rtnl_af_register(&br_af_ops);
1723
1724 err = rtnl_link_register(&br_link_ops);
1725 if (err)
1726 goto out_af;
1727
1728 return 0;
1729
1730 out_af:
1731 rtnl_af_unregister(&br_af_ops);
1732 br_mdb_uninit();
1733 return err;
1734 }
1735
br_netlink_fini(void)1736 void br_netlink_fini(void)
1737 {
1738 br_mdb_uninit();
1739 br_vlan_rtnl_uninit();
1740 rtnl_af_unregister(&br_af_ops);
1741 rtnl_link_unregister(&br_link_ops);
1742 }
1743
