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_cfm.h"
20 #include "br_private_tunnel.h"
21 #include "br_private_mcast_eht.h"
22
__get_num_vlan_infos(struct net_bridge_vlan_group * vg,u32 filter_mask)23 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
24 u32 filter_mask)
25 {
26 struct net_bridge_vlan *v;
27 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
28 u16 flags, pvid;
29 int num_vlans = 0;
30
31 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
32 return 0;
33
34 pvid = br_get_pvid(vg);
35 /* Count number of vlan infos */
36 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
37 flags = 0;
38 /* only a context, bridge vlan not activated */
39 if (!br_vlan_should_use(v))
40 continue;
41 if (v->vid == pvid)
42 flags |= BRIDGE_VLAN_INFO_PVID;
43
44 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
45 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
46
47 if (vid_range_start == 0) {
48 goto initvars;
49 } else if ((v->vid - vid_range_end) == 1 &&
50 flags == vid_range_flags) {
51 vid_range_end = v->vid;
52 continue;
53 } else {
54 if ((vid_range_end - vid_range_start) > 0)
55 num_vlans += 2;
56 else
57 num_vlans += 1;
58 }
59 initvars:
60 vid_range_start = v->vid;
61 vid_range_end = v->vid;
62 vid_range_flags = flags;
63 }
64
65 if (vid_range_start != 0) {
66 if ((vid_range_end - vid_range_start) > 0)
67 num_vlans += 2;
68 else
69 num_vlans += 1;
70 }
71
72 return num_vlans;
73 }
74
br_get_num_vlan_infos(struct net_bridge_vlan_group * vg,u32 filter_mask)75 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
76 u32 filter_mask)
77 {
78 int num_vlans;
79
80 if (!vg)
81 return 0;
82
83 if (filter_mask & RTEXT_FILTER_BRVLAN)
84 return vg->num_vlans;
85
86 rcu_read_lock();
87 num_vlans = __get_num_vlan_infos(vg, filter_mask);
88 rcu_read_unlock();
89
90 return num_vlans;
91 }
92
br_get_link_af_size_filtered(const struct net_device * dev,u32 filter_mask)93 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
94 u32 filter_mask)
95 {
96 struct net_bridge_vlan_group *vg = NULL;
97 struct net_bridge_port *p = NULL;
98 struct net_bridge *br = NULL;
99 u32 num_cfm_peer_mep_infos;
100 u32 num_cfm_mep_infos;
101 size_t vinfo_sz = 0;
102 int num_vlan_infos;
103
104 rcu_read_lock();
105 if (netif_is_bridge_port(dev)) {
106 p = br_port_get_check_rcu(dev);
107 if (p)
108 vg = nbp_vlan_group_rcu(p);
109 } else if (dev->priv_flags & IFF_EBRIDGE) {
110 br = netdev_priv(dev);
111 vg = br_vlan_group_rcu(br);
112 }
113 num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
114 rcu_read_unlock();
115
116 if (p && (p->flags & BR_VLAN_TUNNEL))
117 vinfo_sz += br_get_vlan_tunnel_info_size(vg);
118
119 /* Each VLAN is returned in bridge_vlan_info along with flags */
120 vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
121
122 if (!(filter_mask & RTEXT_FILTER_CFM_STATUS))
123 return vinfo_sz;
124
125 if (!br)
126 return vinfo_sz;
127
128 /* CFM status info must be added */
129 br_cfm_mep_count(br, &num_cfm_mep_infos);
130 br_cfm_peer_mep_count(br, &num_cfm_peer_mep_infos);
131
132 vinfo_sz += nla_total_size(0); /* IFLA_BRIDGE_CFM */
133 /* For each status struct the MEP instance (u32) is added */
134 /* MEP instance (u32) + br_cfm_mep_status */
135 vinfo_sz += num_cfm_mep_infos *
136 /*IFLA_BRIDGE_CFM_MEP_STATUS_INSTANCE */
137 (nla_total_size(sizeof(u32))
138 /* IFLA_BRIDGE_CFM_MEP_STATUS_OPCODE_UNEXP_SEEN */
139 + nla_total_size(sizeof(u32))
140 /* IFLA_BRIDGE_CFM_MEP_STATUS_VERSION_UNEXP_SEEN */
141 + nla_total_size(sizeof(u32))
142 /* IFLA_BRIDGE_CFM_MEP_STATUS_RX_LEVEL_LOW_SEEN */
143 + nla_total_size(sizeof(u32)));
144 /* MEP instance (u32) + br_cfm_cc_peer_status */
145 vinfo_sz += num_cfm_peer_mep_infos *
146 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_INSTANCE */
147 (nla_total_size(sizeof(u32))
148 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_PEER_MEPID */
149 + nla_total_size(sizeof(u32))
150 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_CCM_DEFECT */
151 + nla_total_size(sizeof(u32))
152 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_RDI */
153 + nla_total_size(sizeof(u32))
154 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_PORT_TLV_VALUE */
155 + nla_total_size(sizeof(u8))
156 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_IF_TLV_VALUE */
157 + nla_total_size(sizeof(u8))
158 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEEN */
159 + nla_total_size(sizeof(u32))
160 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_TLV_SEEN */
161 + nla_total_size(sizeof(u32))
162 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEQ_UNEXP_SEEN */
163 + nla_total_size(sizeof(u32)));
164
165 return vinfo_sz;
166 }
167
br_port_info_size(void)168 static inline size_t br_port_info_size(void)
169 {
170 return nla_total_size(1) /* IFLA_BRPORT_STATE */
171 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */
172 + nla_total_size(4) /* IFLA_BRPORT_COST */
173 + nla_total_size(1) /* IFLA_BRPORT_MODE */
174 + nla_total_size(1) /* IFLA_BRPORT_GUARD */
175 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
176 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
177 + nla_total_size(1) /* IFLA_BRPORT_MCAST_TO_UCAST */
178 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
179 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
180 + nla_total_size(1) /* IFLA_BRPORT_MCAST_FLOOD */
181 + nla_total_size(1) /* IFLA_BRPORT_BCAST_FLOOD */
182 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
183 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
184 + nla_total_size(1) /* IFLA_BRPORT_VLAN_TUNNEL */
185 + nla_total_size(1) /* IFLA_BRPORT_NEIGH_SUPPRESS */
186 + nla_total_size(1) /* IFLA_BRPORT_ISOLATED */
187 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
188 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
189 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */
190 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */
191 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */
192 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */
193 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
194 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */
195 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
196 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
197 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
198 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
199 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */
200 #endif
201 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_GROUP_FWD_MASK */
202 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MRP_RING_OPEN */
203 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MRP_IN_OPEN */
204 + nla_total_size(sizeof(u32)) /* IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT */
205 + nla_total_size(sizeof(u32)) /* IFLA_BRPORT_MCAST_EHT_HOSTS_CNT */
206 + 0;
207 }
208
br_nlmsg_size(struct net_device * dev,u32 filter_mask)209 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
210 {
211 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
212 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
213 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
214 + nla_total_size(4) /* IFLA_MASTER */
215 + nla_total_size(4) /* IFLA_MTU */
216 + nla_total_size(4) /* IFLA_LINK */
217 + nla_total_size(1) /* IFLA_OPERSTATE */
218 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
219 + nla_total_size(br_get_link_af_size_filtered(dev,
220 filter_mask)) /* IFLA_AF_SPEC */
221 + nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */
222 }
223
br_port_fill_attrs(struct sk_buff * skb,const struct net_bridge_port * p)224 static int br_port_fill_attrs(struct sk_buff *skb,
225 const struct net_bridge_port *p)
226 {
227 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
228 struct net_bridge_port *backup_p;
229 u64 timerval;
230
231 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
232 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
233 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
234 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
235 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
236 nla_put_u8(skb, IFLA_BRPORT_PROTECT,
237 !!(p->flags & BR_ROOT_BLOCK)) ||
238 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
239 !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
240 nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
241 !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
242 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
243 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
244 !!(p->flags & BR_FLOOD)) ||
245 nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
246 !!(p->flags & BR_MCAST_FLOOD)) ||
247 nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
248 !!(p->flags & BR_BCAST_FLOOD)) ||
249 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
250 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
251 !!(p->flags & BR_PROXYARP_WIFI)) ||
252 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
253 &p->designated_root) ||
254 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
255 &p->designated_bridge) ||
256 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
257 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
258 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
259 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
260 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
261 p->topology_change_ack) ||
262 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
263 nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
264 BR_VLAN_TUNNEL)) ||
265 nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
266 nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
267 !!(p->flags & BR_NEIGH_SUPPRESS)) ||
268 nla_put_u8(skb, IFLA_BRPORT_MRP_RING_OPEN, !!(p->flags &
269 BR_MRP_LOST_CONT)) ||
270 nla_put_u8(skb, IFLA_BRPORT_MRP_IN_OPEN,
271 !!(p->flags & BR_MRP_LOST_IN_CONT)) ||
272 nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)))
273 return -EMSGSIZE;
274
275 timerval = br_timer_value(&p->message_age_timer);
276 if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
277 IFLA_BRPORT_PAD))
278 return -EMSGSIZE;
279 timerval = br_timer_value(&p->forward_delay_timer);
280 if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
281 IFLA_BRPORT_PAD))
282 return -EMSGSIZE;
283 timerval = br_timer_value(&p->hold_timer);
284 if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
285 IFLA_BRPORT_PAD))
286 return -EMSGSIZE;
287
288 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
289 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
290 p->multicast_router) ||
291 nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT,
292 p->multicast_eht_hosts_limit) ||
293 nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_CNT,
294 p->multicast_eht_hosts_cnt))
295 return -EMSGSIZE;
296 #endif
297
298 /* we might be called only with br->lock */
299 rcu_read_lock();
300 backup_p = rcu_dereference(p->backup_port);
301 if (backup_p)
302 nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT,
303 backup_p->dev->ifindex);
304 rcu_read_unlock();
305
306 return 0;
307 }
308
br_fill_ifvlaninfo_range(struct sk_buff * skb,u16 vid_start,u16 vid_end,u16 flags)309 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
310 u16 vid_end, u16 flags)
311 {
312 struct bridge_vlan_info vinfo;
313
314 if ((vid_end - vid_start) > 0) {
315 /* add range to skb */
316 vinfo.vid = vid_start;
317 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
318 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
319 sizeof(vinfo), &vinfo))
320 goto nla_put_failure;
321
322 vinfo.vid = vid_end;
323 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
324 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
325 sizeof(vinfo), &vinfo))
326 goto nla_put_failure;
327 } else {
328 vinfo.vid = vid_start;
329 vinfo.flags = flags;
330 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
331 sizeof(vinfo), &vinfo))
332 goto nla_put_failure;
333 }
334
335 return 0;
336
337 nla_put_failure:
338 return -EMSGSIZE;
339 }
340
br_fill_ifvlaninfo_compressed(struct sk_buff * skb,struct net_bridge_vlan_group * vg)341 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
342 struct net_bridge_vlan_group *vg)
343 {
344 struct net_bridge_vlan *v;
345 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
346 u16 flags, pvid;
347 int err = 0;
348
349 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
350 * and mark vlan info with begin and end flags
351 * if vlaninfo represents a range
352 */
353 pvid = br_get_pvid(vg);
354 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
355 flags = 0;
356 if (!br_vlan_should_use(v))
357 continue;
358 if (v->vid == pvid)
359 flags |= BRIDGE_VLAN_INFO_PVID;
360
361 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
362 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
363
364 if (vid_range_start == 0) {
365 goto initvars;
366 } else if ((v->vid - vid_range_end) == 1 &&
367 flags == vid_range_flags) {
368 vid_range_end = v->vid;
369 continue;
370 } else {
371 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
372 vid_range_end,
373 vid_range_flags);
374 if (err)
375 return err;
376 }
377
378 initvars:
379 vid_range_start = v->vid;
380 vid_range_end = v->vid;
381 vid_range_flags = flags;
382 }
383
384 if (vid_range_start != 0) {
385 /* Call it once more to send any left over vlans */
386 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
387 vid_range_end,
388 vid_range_flags);
389 if (err)
390 return err;
391 }
392
393 return 0;
394 }
395
br_fill_ifvlaninfo(struct sk_buff * skb,struct net_bridge_vlan_group * vg)396 static int br_fill_ifvlaninfo(struct sk_buff *skb,
397 struct net_bridge_vlan_group *vg)
398 {
399 struct bridge_vlan_info vinfo;
400 struct net_bridge_vlan *v;
401 u16 pvid;
402
403 pvid = br_get_pvid(vg);
404 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
405 if (!br_vlan_should_use(v))
406 continue;
407
408 vinfo.vid = v->vid;
409 vinfo.flags = 0;
410 if (v->vid == pvid)
411 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
412
413 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
414 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
415
416 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
417 sizeof(vinfo), &vinfo))
418 goto nla_put_failure;
419 }
420
421 return 0;
422
423 nla_put_failure:
424 return -EMSGSIZE;
425 }
426
427 /*
428 * Create one netlink message for one interface
429 * Contains port and master info as well as carrier and bridge state.
430 */
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,bool getlink)431 static int br_fill_ifinfo(struct sk_buff *skb,
432 const struct net_bridge_port *port,
433 u32 pid, u32 seq, int event, unsigned int flags,
434 u32 filter_mask, const struct net_device *dev,
435 bool getlink)
436 {
437 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
438 struct nlattr *af = NULL;
439 struct net_bridge *br;
440 struct ifinfomsg *hdr;
441 struct nlmsghdr *nlh;
442
443 if (port)
444 br = port->br;
445 else
446 br = netdev_priv(dev);
447
448 br_debug(br, "br_fill_info event %d port %s master %s\n",
449 event, dev->name, br->dev->name);
450
451 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
452 if (nlh == NULL)
453 return -EMSGSIZE;
454
455 hdr = nlmsg_data(nlh);
456 hdr->ifi_family = AF_BRIDGE;
457 hdr->__ifi_pad = 0;
458 hdr->ifi_type = dev->type;
459 hdr->ifi_index = dev->ifindex;
460 hdr->ifi_flags = dev_get_flags(dev);
461 hdr->ifi_change = 0;
462
463 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
464 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
465 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
466 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
467 (dev->addr_len &&
468 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
469 (dev->ifindex != dev_get_iflink(dev) &&
470 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
471 goto nla_put_failure;
472
473 if (event == RTM_NEWLINK && port) {
474 struct nlattr *nest;
475
476 nest = nla_nest_start(skb, IFLA_PROTINFO);
477 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
478 goto nla_put_failure;
479 nla_nest_end(skb, nest);
480 }
481
482 if (filter_mask & (RTEXT_FILTER_BRVLAN |
483 RTEXT_FILTER_BRVLAN_COMPRESSED |
484 RTEXT_FILTER_MRP |
485 RTEXT_FILTER_CFM_CONFIG |
486 RTEXT_FILTER_CFM_STATUS)) {
487 af = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
488 if (!af)
489 goto nla_put_failure;
490 }
491
492 /* Check if the VID information is requested */
493 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
494 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
495 struct net_bridge_vlan_group *vg;
496 int err;
497
498 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
499 rcu_read_lock();
500 if (port)
501 vg = nbp_vlan_group_rcu(port);
502 else
503 vg = br_vlan_group_rcu(br);
504
505 if (!vg || !vg->num_vlans) {
506 rcu_read_unlock();
507 goto done;
508 }
509 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
510 err = br_fill_ifvlaninfo_compressed(skb, vg);
511 else
512 err = br_fill_ifvlaninfo(skb, vg);
513
514 if (port && (port->flags & BR_VLAN_TUNNEL))
515 err = br_fill_vlan_tunnel_info(skb, vg);
516 rcu_read_unlock();
517 if (err)
518 goto nla_put_failure;
519 }
520
521 if (filter_mask & RTEXT_FILTER_MRP) {
522 int err;
523
524 if (!br_mrp_enabled(br) || port)
525 goto done;
526
527 rcu_read_lock();
528 err = br_mrp_fill_info(skb, br);
529 rcu_read_unlock();
530
531 if (err)
532 goto nla_put_failure;
533 }
534
535 if (filter_mask & (RTEXT_FILTER_CFM_CONFIG | RTEXT_FILTER_CFM_STATUS)) {
536 struct nlattr *cfm_nest = NULL;
537 int err;
538
539 if (!br_cfm_created(br) || port)
540 goto done;
541
542 cfm_nest = nla_nest_start(skb, IFLA_BRIDGE_CFM);
543 if (!cfm_nest)
544 goto nla_put_failure;
545
546 if (filter_mask & RTEXT_FILTER_CFM_CONFIG) {
547 rcu_read_lock();
548 err = br_cfm_config_fill_info(skb, br);
549 rcu_read_unlock();
550 if (err)
551 goto nla_put_failure;
552 }
553
554 if (filter_mask & RTEXT_FILTER_CFM_STATUS) {
555 rcu_read_lock();
556 err = br_cfm_status_fill_info(skb, br, getlink);
557 rcu_read_unlock();
558 if (err)
559 goto nla_put_failure;
560 }
561
562 nla_nest_end(skb, cfm_nest);
563 }
564
565 done:
566 if (af)
567 nla_nest_end(skb, af);
568 nlmsg_end(skb, nlh);
569 return 0;
570
571 nla_put_failure:
572 nlmsg_cancel(skb, nlh);
573 return -EMSGSIZE;
574 }
575
br_info_notify(int event,const struct net_bridge * br,const struct net_bridge_port * port,u32 filter)576 void br_info_notify(int event, const struct net_bridge *br,
577 const struct net_bridge_port *port, u32 filter)
578 {
579 struct net_device *dev;
580 struct sk_buff *skb;
581 int err = -ENOBUFS;
582 struct net *net;
583 u16 port_no = 0;
584
585 if (WARN_ON(!port && !br))
586 return;
587
588 if (port) {
589 dev = port->dev;
590 br = port->br;
591 port_no = port->port_no;
592 } else {
593 dev = br->dev;
594 }
595
596 net = dev_net(dev);
597 br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
598
599 skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
600 if (skb == NULL)
601 goto errout;
602
603 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev, false);
604 if (err < 0) {
605 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
606 WARN_ON(err == -EMSGSIZE);
607 kfree_skb(skb);
608 goto errout;
609 }
610 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
611 return;
612 errout:
613 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
614 }
615
616 /* 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)617 void br_ifinfo_notify(int event, const struct net_bridge *br,
618 const struct net_bridge_port *port)
619 {
620 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
621
622 return br_info_notify(event, br, port, filter);
623 }
624
625 /*
626 * Dump information about all ports, in response to GETLINK
627 */
br_getlink(struct sk_buff * skb,u32 pid,u32 seq,struct net_device * dev,u32 filter_mask,int nlflags)628 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
629 struct net_device *dev, u32 filter_mask, int nlflags)
630 {
631 struct net_bridge_port *port = br_port_get_rtnl(dev);
632
633 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
634 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) &&
635 !(filter_mask & RTEXT_FILTER_MRP) &&
636 !(filter_mask & RTEXT_FILTER_CFM_CONFIG) &&
637 !(filter_mask & RTEXT_FILTER_CFM_STATUS))
638 return 0;
639
640 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
641 filter_mask, dev, true);
642 }
643
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)644 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
645 int cmd, struct bridge_vlan_info *vinfo, bool *changed,
646 struct netlink_ext_ack *extack)
647 {
648 bool curr_change;
649 int err = 0;
650
651 switch (cmd) {
652 case RTM_SETLINK:
653 if (p) {
654 /* if the MASTER flag is set this will act on the global
655 * per-VLAN entry as well
656 */
657 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
658 &curr_change, extack);
659 } else {
660 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
661 err = br_vlan_add(br, vinfo->vid, vinfo->flags,
662 &curr_change, extack);
663 }
664 if (curr_change)
665 *changed = true;
666 break;
667
668 case RTM_DELLINK:
669 if (p) {
670 if (!nbp_vlan_delete(p, vinfo->vid))
671 *changed = true;
672
673 if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
674 !br_vlan_delete(p->br, vinfo->vid))
675 *changed = true;
676 } else if (!br_vlan_delete(br, vinfo->vid)) {
677 *changed = true;
678 }
679 break;
680 }
681
682 return err;
683 }
684
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)685 int br_process_vlan_info(struct net_bridge *br,
686 struct net_bridge_port *p, int cmd,
687 struct bridge_vlan_info *vinfo_curr,
688 struct bridge_vlan_info **vinfo_last,
689 bool *changed,
690 struct netlink_ext_ack *extack)
691 {
692 int err, rtm_cmd;
693
694 if (!br_vlan_valid_id(vinfo_curr->vid, extack))
695 return -EINVAL;
696
697 /* needed for vlan-only NEWVLAN/DELVLAN notifications */
698 rtm_cmd = br_afspec_cmd_to_rtm(cmd);
699
700 if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
701 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
702 return -EINVAL;
703 *vinfo_last = vinfo_curr;
704 return 0;
705 }
706
707 if (*vinfo_last) {
708 struct bridge_vlan_info tmp_vinfo;
709 int v, v_change_start = 0;
710
711 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
712 return -EINVAL;
713
714 memcpy(&tmp_vinfo, *vinfo_last,
715 sizeof(struct bridge_vlan_info));
716 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
717 bool curr_change = false;
718
719 tmp_vinfo.vid = v;
720 err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change,
721 extack);
722 if (err)
723 break;
724 if (curr_change) {
725 *changed = curr_change;
726 if (!v_change_start)
727 v_change_start = v;
728 } else {
729 /* nothing to notify yet */
730 if (!v_change_start)
731 continue;
732 br_vlan_notify(br, p, v_change_start,
733 v - 1, rtm_cmd);
734 v_change_start = 0;
735 }
736 cond_resched();
737 }
738 /* v_change_start is set only if the last/whole range changed */
739 if (v_change_start)
740 br_vlan_notify(br, p, v_change_start,
741 v - 1, rtm_cmd);
742
743 *vinfo_last = NULL;
744
745 return err;
746 }
747
748 err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
749 if (*changed)
750 br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd);
751
752 return err;
753 }
754
br_afspec(struct net_bridge * br,struct net_bridge_port * p,struct nlattr * af_spec,int cmd,bool * changed,struct netlink_ext_ack * extack)755 static int br_afspec(struct net_bridge *br,
756 struct net_bridge_port *p,
757 struct nlattr *af_spec,
758 int cmd, bool *changed,
759 struct netlink_ext_ack *extack)
760 {
761 struct bridge_vlan_info *vinfo_curr = NULL;
762 struct bridge_vlan_info *vinfo_last = NULL;
763 struct nlattr *attr;
764 struct vtunnel_info tinfo_last = {};
765 struct vtunnel_info tinfo_curr = {};
766 int err = 0, rem;
767
768 nla_for_each_nested(attr, af_spec, rem) {
769 err = 0;
770 switch (nla_type(attr)) {
771 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
772 if (!p || !(p->flags & BR_VLAN_TUNNEL))
773 return -EINVAL;
774 err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
775 if (err)
776 return err;
777 err = br_process_vlan_tunnel_info(br, p, cmd,
778 &tinfo_curr,
779 &tinfo_last,
780 changed);
781 if (err)
782 return err;
783 break;
784 case IFLA_BRIDGE_VLAN_INFO:
785 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
786 return -EINVAL;
787 vinfo_curr = nla_data(attr);
788 err = br_process_vlan_info(br, p, cmd, vinfo_curr,
789 &vinfo_last, changed,
790 extack);
791 if (err)
792 return err;
793 break;
794 case IFLA_BRIDGE_MRP:
795 err = br_mrp_parse(br, p, attr, cmd, extack);
796 if (err)
797 return err;
798 break;
799 case IFLA_BRIDGE_CFM:
800 err = br_cfm_parse(br, p, attr, cmd, extack);
801 if (err)
802 return err;
803 break;
804 }
805 }
806
807 return err;
808 }
809
810 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
811 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
812 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
813 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
814 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
815 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
816 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
817 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
818 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
819 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
820 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
821 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
822 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
823 [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
824 [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
825 [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
826 [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
827 [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
828 [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
829 [IFLA_BRPORT_ISOLATED] = { .type = NLA_U8 },
830 [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
831 [IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT] = { .type = NLA_U32 },
832 };
833
834 /* Change the state of the port and notify spanning tree */
br_set_port_state(struct net_bridge_port * p,u8 state)835 static int br_set_port_state(struct net_bridge_port *p, u8 state)
836 {
837 if (state > BR_STATE_BLOCKING)
838 return -EINVAL;
839
840 /* if kernel STP is running, don't allow changes */
841 if (p->br->stp_enabled == BR_KERNEL_STP)
842 return -EBUSY;
843
844 /* if device is not up, change is not allowed
845 * if link is not present, only allowable state is disabled
846 */
847 if (!netif_running(p->dev) ||
848 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
849 return -ENETDOWN;
850
851 br_set_state(p, state);
852 br_port_state_selection(p->br);
853 return 0;
854 }
855
856 /* 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)857 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
858 int attrtype, unsigned long mask)
859 {
860 if (!tb[attrtype])
861 return;
862
863 if (nla_get_u8(tb[attrtype]))
864 p->flags |= mask;
865 else
866 p->flags &= ~mask;
867 }
868
869 /* Process bridge protocol info on port */
br_setport(struct net_bridge_port * p,struct nlattr * tb[],struct netlink_ext_ack * extack)870 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[],
871 struct netlink_ext_ack *extack)
872 {
873 unsigned long old_flags, changed_mask;
874 bool br_vlan_tunnel_old;
875 int err;
876
877 old_flags = p->flags;
878 br_vlan_tunnel_old = (old_flags & BR_VLAN_TUNNEL) ? true : false;
879
880 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
881 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
882 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE,
883 BR_MULTICAST_FAST_LEAVE);
884 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
885 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
886 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
887 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
888 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST,
889 BR_MULTICAST_TO_UNICAST);
890 br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
891 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
892 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
893 br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
894 br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS, BR_NEIGH_SUPPRESS);
895 br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
896
897 changed_mask = old_flags ^ p->flags;
898
899 err = br_switchdev_set_port_flag(p, p->flags, changed_mask, extack);
900 if (err) {
901 p->flags = old_flags;
902 return err;
903 }
904
905 if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
906 nbp_vlan_tunnel_info_flush(p);
907
908 br_port_flags_change(p, changed_mask);
909
910 if (tb[IFLA_BRPORT_COST]) {
911 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
912 if (err)
913 return err;
914 }
915
916 if (tb[IFLA_BRPORT_PRIORITY]) {
917 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
918 if (err)
919 return err;
920 }
921
922 if (tb[IFLA_BRPORT_STATE]) {
923 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
924 if (err)
925 return err;
926 }
927
928 if (tb[IFLA_BRPORT_FLUSH])
929 br_fdb_delete_by_port(p->br, p, 0, 0);
930
931 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
932 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
933 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
934
935 err = br_multicast_set_port_router(p, mcast_router);
936 if (err)
937 return err;
938 }
939
940 if (tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]) {
941 u32 hlimit;
942
943 hlimit = nla_get_u32(tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]);
944 err = br_multicast_eht_set_hosts_limit(p, hlimit);
945 if (err)
946 return err;
947 }
948 #endif
949
950 if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
951 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
952
953 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
954 return -EINVAL;
955 p->group_fwd_mask = fwd_mask;
956 }
957
958 if (tb[IFLA_BRPORT_BACKUP_PORT]) {
959 struct net_device *backup_dev = NULL;
960 u32 backup_ifindex;
961
962 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
963 if (backup_ifindex) {
964 backup_dev = __dev_get_by_index(dev_net(p->dev),
965 backup_ifindex);
966 if (!backup_dev)
967 return -ENOENT;
968 }
969
970 err = nbp_backup_change(p, backup_dev);
971 if (err)
972 return err;
973 }
974
975 return 0;
976 }
977
978 /* Change state and parameters on port. */
br_setlink(struct net_device * dev,struct nlmsghdr * nlh,u16 flags,struct netlink_ext_ack * extack)979 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags,
980 struct netlink_ext_ack *extack)
981 {
982 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
983 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
984 struct net_bridge_port *p;
985 struct nlattr *protinfo;
986 struct nlattr *afspec;
987 bool changed = false;
988 int err = 0;
989
990 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
991 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
992 if (!protinfo && !afspec)
993 return 0;
994
995 p = br_port_get_rtnl(dev);
996 /* We want to accept dev as bridge itself if the AF_SPEC
997 * is set to see if someone is setting vlan info on the bridge
998 */
999 if (!p && !afspec)
1000 return -EINVAL;
1001
1002 if (p && protinfo) {
1003 if (protinfo->nla_type & NLA_F_NESTED) {
1004 err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX,
1005 protinfo,
1006 br_port_policy,
1007 NULL);
1008 if (err)
1009 return err;
1010
1011 spin_lock_bh(&p->br->lock);
1012 err = br_setport(p, tb, extack);
1013 spin_unlock_bh(&p->br->lock);
1014 } else {
1015 /* Binary compatibility with old RSTP */
1016 if (nla_len(protinfo) < sizeof(u8))
1017 return -EINVAL;
1018
1019 spin_lock_bh(&p->br->lock);
1020 err = br_set_port_state(p, nla_get_u8(protinfo));
1021 spin_unlock_bh(&p->br->lock);
1022 }
1023 if (err)
1024 goto out;
1025 changed = true;
1026 }
1027
1028 if (afspec)
1029 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
1030
1031 if (changed)
1032 br_ifinfo_notify(RTM_NEWLINK, br, p);
1033 out:
1034 return err;
1035 }
1036
1037 /* Delete port information */
br_dellink(struct net_device * dev,struct nlmsghdr * nlh,u16 flags)1038 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
1039 {
1040 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
1041 struct net_bridge_port *p;
1042 struct nlattr *afspec;
1043 bool changed = false;
1044 int err = 0;
1045
1046 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
1047 if (!afspec)
1048 return 0;
1049
1050 p = br_port_get_rtnl(dev);
1051 /* We want to accept dev as bridge itself as well */
1052 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
1053 return -EINVAL;
1054
1055 err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL);
1056 if (changed)
1057 /* Send RTM_NEWLINK because userspace
1058 * expects RTM_NEWLINK for vlan dels
1059 */
1060 br_ifinfo_notify(RTM_NEWLINK, br, p);
1061
1062 return err;
1063 }
1064
br_validate(struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)1065 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
1066 struct netlink_ext_ack *extack)
1067 {
1068 if (tb[IFLA_ADDRESS]) {
1069 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1070 return -EINVAL;
1071 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1072 return -EADDRNOTAVAIL;
1073 }
1074
1075 if (!data)
1076 return 0;
1077
1078 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1079 if (data[IFLA_BR_VLAN_PROTOCOL] &&
1080 !eth_type_vlan(nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])))
1081 return -EPROTONOSUPPORT;
1082
1083 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1084 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1085
1086 if (defpvid >= VLAN_VID_MASK)
1087 return -EINVAL;
1088 }
1089 #endif
1090
1091 return 0;
1092 }
1093
br_port_slave_changelink(struct net_device * brdev,struct net_device * dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)1094 static int br_port_slave_changelink(struct net_device *brdev,
1095 struct net_device *dev,
1096 struct nlattr *tb[],
1097 struct nlattr *data[],
1098 struct netlink_ext_ack *extack)
1099 {
1100 struct net_bridge *br = netdev_priv(brdev);
1101 int ret;
1102
1103 if (!data)
1104 return 0;
1105
1106 spin_lock_bh(&br->lock);
1107 ret = br_setport(br_port_get_rtnl(dev), data, extack);
1108 spin_unlock_bh(&br->lock);
1109
1110 return ret;
1111 }
1112
br_port_fill_slave_info(struct sk_buff * skb,const struct net_device * brdev,const struct net_device * dev)1113 static int br_port_fill_slave_info(struct sk_buff *skb,
1114 const struct net_device *brdev,
1115 const struct net_device *dev)
1116 {
1117 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
1118 }
1119
br_port_get_slave_size(const struct net_device * brdev,const struct net_device * dev)1120 static size_t br_port_get_slave_size(const struct net_device *brdev,
1121 const struct net_device *dev)
1122 {
1123 return br_port_info_size();
1124 }
1125
1126 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1127 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1128 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
1129 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
1130 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1131 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1132 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1133 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1134 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1135 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1136 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1137 .len = ETH_ALEN },
1138 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1139 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1140 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1141 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1142 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1143 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1144 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1145 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1146 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1147 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1148 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1149 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1150 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1151 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1152 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1153 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1154 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1155 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1156 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1157 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1158 [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1159 [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1160 [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1161 [IFLA_BR_MULTI_BOOLOPT] =
1162 NLA_POLICY_EXACT_LEN(sizeof(struct br_boolopt_multi)),
1163 };
1164
br_changelink(struct net_device * brdev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)1165 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1166 struct nlattr *data[],
1167 struct netlink_ext_ack *extack)
1168 {
1169 struct net_bridge *br = netdev_priv(brdev);
1170 int err;
1171
1172 if (!data)
1173 return 0;
1174
1175 if (data[IFLA_BR_FORWARD_DELAY]) {
1176 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1177 if (err)
1178 return err;
1179 }
1180
1181 if (data[IFLA_BR_HELLO_TIME]) {
1182 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1183 if (err)
1184 return err;
1185 }
1186
1187 if (data[IFLA_BR_MAX_AGE]) {
1188 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1189 if (err)
1190 return err;
1191 }
1192
1193 if (data[IFLA_BR_AGEING_TIME]) {
1194 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1195 if (err)
1196 return err;
1197 }
1198
1199 if (data[IFLA_BR_STP_STATE]) {
1200 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1201
1202 err = br_stp_set_enabled(br, stp_enabled, extack);
1203 if (err)
1204 return err;
1205 }
1206
1207 if (data[IFLA_BR_PRIORITY]) {
1208 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1209
1210 br_stp_set_bridge_priority(br, priority);
1211 }
1212
1213 if (data[IFLA_BR_VLAN_FILTERING]) {
1214 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1215
1216 err = br_vlan_filter_toggle(br, vlan_filter, extack);
1217 if (err)
1218 return err;
1219 }
1220
1221 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1222 if (data[IFLA_BR_VLAN_PROTOCOL]) {
1223 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1224
1225 err = __br_vlan_set_proto(br, vlan_proto, extack);
1226 if (err)
1227 return err;
1228 }
1229
1230 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1231 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1232
1233 err = __br_vlan_set_default_pvid(br, defpvid, extack);
1234 if (err)
1235 return err;
1236 }
1237
1238 if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1239 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1240
1241 err = br_vlan_set_stats(br, vlan_stats);
1242 if (err)
1243 return err;
1244 }
1245
1246 if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1247 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1248
1249 err = br_vlan_set_stats_per_port(br, per_port);
1250 if (err)
1251 return err;
1252 }
1253 #endif
1254
1255 if (data[IFLA_BR_GROUP_FWD_MASK]) {
1256 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1257
1258 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1259 return -EINVAL;
1260 br->group_fwd_mask = fwd_mask;
1261 }
1262
1263 if (data[IFLA_BR_GROUP_ADDR]) {
1264 u8 new_addr[ETH_ALEN];
1265
1266 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1267 return -EINVAL;
1268 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1269 if (!is_link_local_ether_addr(new_addr))
1270 return -EINVAL;
1271 if (new_addr[5] == 1 || /* 802.3x Pause address */
1272 new_addr[5] == 2 || /* 802.3ad Slow protocols */
1273 new_addr[5] == 3) /* 802.1X PAE address */
1274 return -EINVAL;
1275 spin_lock_bh(&br->lock);
1276 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1277 spin_unlock_bh(&br->lock);
1278 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1279 br_recalculate_fwd_mask(br);
1280 }
1281
1282 if (data[IFLA_BR_FDB_FLUSH])
1283 br_fdb_flush(br);
1284
1285 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1286 if (data[IFLA_BR_MCAST_ROUTER]) {
1287 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1288
1289 err = br_multicast_set_router(br, multicast_router);
1290 if (err)
1291 return err;
1292 }
1293
1294 if (data[IFLA_BR_MCAST_SNOOPING]) {
1295 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1296
1297 err = br_multicast_toggle(br, mcast_snooping, extack);
1298 if (err)
1299 return err;
1300 }
1301
1302 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1303 u8 val;
1304
1305 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1306 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1307 }
1308
1309 if (data[IFLA_BR_MCAST_QUERIER]) {
1310 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1311
1312 err = br_multicast_set_querier(br, mcast_querier);
1313 if (err)
1314 return err;
1315 }
1316
1317 if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
1318 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
1319 RHT_ELASTICITY);
1320
1321 if (data[IFLA_BR_MCAST_HASH_MAX])
1322 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1323
1324 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1325 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1326
1327 br->multicast_last_member_count = val;
1328 }
1329
1330 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1331 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1332
1333 br->multicast_startup_query_count = val;
1334 }
1335
1336 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1337 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1338
1339 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1340 }
1341
1342 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1343 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1344
1345 br->multicast_membership_interval = clock_t_to_jiffies(val);
1346 }
1347
1348 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1349 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1350
1351 br->multicast_querier_interval = clock_t_to_jiffies(val);
1352 }
1353
1354 if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1355 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1356
1357 br->multicast_query_interval = clock_t_to_jiffies(val);
1358 }
1359
1360 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1361 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1362
1363 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1364 }
1365
1366 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1367 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1368
1369 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1370 }
1371
1372 if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1373 __u8 mcast_stats;
1374
1375 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1376 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1377 }
1378
1379 if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1380 __u8 igmp_version;
1381
1382 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1383 err = br_multicast_set_igmp_version(br, igmp_version);
1384 if (err)
1385 return err;
1386 }
1387
1388 #if IS_ENABLED(CONFIG_IPV6)
1389 if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1390 __u8 mld_version;
1391
1392 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1393 err = br_multicast_set_mld_version(br, mld_version);
1394 if (err)
1395 return err;
1396 }
1397 #endif
1398 #endif
1399 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1400 if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1401 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1402
1403 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1404 }
1405
1406 if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1407 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1408
1409 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1410 }
1411
1412 if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1413 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1414
1415 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1416 }
1417 #endif
1418
1419 if (data[IFLA_BR_MULTI_BOOLOPT]) {
1420 struct br_boolopt_multi *bm;
1421
1422 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
1423 err = br_boolopt_multi_toggle(br, bm, extack);
1424 if (err)
1425 return err;
1426 }
1427
1428 return 0;
1429 }
1430
br_dev_newlink(struct net * src_net,struct net_device * dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)1431 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1432 struct nlattr *tb[], struct nlattr *data[],
1433 struct netlink_ext_ack *extack)
1434 {
1435 struct net_bridge *br = netdev_priv(dev);
1436 int err;
1437
1438 err = register_netdevice(dev);
1439 if (err)
1440 return err;
1441
1442 if (tb[IFLA_ADDRESS]) {
1443 spin_lock_bh(&br->lock);
1444 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1445 spin_unlock_bh(&br->lock);
1446 }
1447
1448 err = br_changelink(dev, tb, data, extack);
1449 if (err)
1450 br_dev_delete(dev, NULL);
1451
1452 return err;
1453 }
1454
br_get_size(const struct net_device * brdev)1455 static size_t br_get_size(const struct net_device *brdev)
1456 {
1457 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
1458 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
1459 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
1460 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
1461 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
1462 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
1463 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
1464 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1465 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1466 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */
1467 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */
1468 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_PER_PORT */
1469 #endif
1470 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
1471 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */
1472 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */
1473 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */
1474 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */
1475 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */
1476 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1477 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1478 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1479 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1480 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1481 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
1482 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1483 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */
1484 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */
1485 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1486 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */
1487 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */
1488 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */
1489 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */
1490 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1491 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1492 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1493 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1494 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1495 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1496 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1497 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1498 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */
1499 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */
1500 #endif
1501 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1502 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */
1503 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */
1504 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */
1505 #endif
1506 nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
1507 0;
1508 }
1509
br_fill_info(struct sk_buff * skb,const struct net_device * brdev)1510 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1511 {
1512 struct net_bridge *br = netdev_priv(brdev);
1513 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1514 u32 hello_time = jiffies_to_clock_t(br->hello_time);
1515 u32 age_time = jiffies_to_clock_t(br->max_age);
1516 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1517 u32 stp_enabled = br->stp_enabled;
1518 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1519 u8 vlan_enabled = br_vlan_enabled(br->dev);
1520 struct br_boolopt_multi bm;
1521 u64 clockval;
1522
1523 clockval = br_timer_value(&br->hello_timer);
1524 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1525 return -EMSGSIZE;
1526 clockval = br_timer_value(&br->tcn_timer);
1527 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1528 return -EMSGSIZE;
1529 clockval = br_timer_value(&br->topology_change_timer);
1530 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1531 IFLA_BR_PAD))
1532 return -EMSGSIZE;
1533 clockval = br_timer_value(&br->gc_work.timer);
1534 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1535 return -EMSGSIZE;
1536
1537 br_boolopt_multi_get(br, &bm);
1538 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1539 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1540 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1541 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1542 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1543 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1544 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1545 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1546 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1547 &br->bridge_id) ||
1548 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1549 &br->designated_root) ||
1550 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1551 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1552 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1553 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1554 br->topology_change_detected) ||
1555 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
1556 nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
1557 return -EMSGSIZE;
1558
1559 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1560 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1561 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1562 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1563 br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1564 nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1565 br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)))
1566 return -EMSGSIZE;
1567 #endif
1568 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1569 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1570 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1571 br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1572 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1573 br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1574 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1575 br_opt_get(br, BROPT_MULTICAST_QUERIER)) ||
1576 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1577 br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1578 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
1579 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1580 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1581 br->multicast_last_member_count) ||
1582 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1583 br->multicast_startup_query_count) ||
1584 nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1585 br->multicast_igmp_version))
1586 return -EMSGSIZE;
1587 #if IS_ENABLED(CONFIG_IPV6)
1588 if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1589 br->multicast_mld_version))
1590 return -EMSGSIZE;
1591 #endif
1592 clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1593 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1594 IFLA_BR_PAD))
1595 return -EMSGSIZE;
1596 clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1597 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1598 IFLA_BR_PAD))
1599 return -EMSGSIZE;
1600 clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1601 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1602 IFLA_BR_PAD))
1603 return -EMSGSIZE;
1604 clockval = jiffies_to_clock_t(br->multicast_query_interval);
1605 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1606 IFLA_BR_PAD))
1607 return -EMSGSIZE;
1608 clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1609 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1610 IFLA_BR_PAD))
1611 return -EMSGSIZE;
1612 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1613 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1614 IFLA_BR_PAD))
1615 return -EMSGSIZE;
1616 #endif
1617 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1618 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1619 br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1620 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1621 br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1622 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1623 br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1624 return -EMSGSIZE;
1625 #endif
1626
1627 return 0;
1628 }
1629
br_get_linkxstats_size(const struct net_device * dev,int attr)1630 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1631 {
1632 struct net_bridge_port *p = NULL;
1633 struct net_bridge_vlan_group *vg;
1634 struct net_bridge_vlan *v;
1635 struct net_bridge *br;
1636 int numvls = 0;
1637
1638 switch (attr) {
1639 case IFLA_STATS_LINK_XSTATS:
1640 br = netdev_priv(dev);
1641 vg = br_vlan_group(br);
1642 break;
1643 case IFLA_STATS_LINK_XSTATS_SLAVE:
1644 p = br_port_get_rtnl(dev);
1645 if (!p)
1646 return 0;
1647 br = p->br;
1648 vg = nbp_vlan_group(p);
1649 break;
1650 default:
1651 return 0;
1652 }
1653
1654 if (vg) {
1655 /* we need to count all, even placeholder entries */
1656 list_for_each_entry(v, &vg->vlan_list, vlist)
1657 numvls++;
1658 }
1659
1660 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1661 nla_total_size(sizeof(struct br_mcast_stats)) +
1662 nla_total_size(0);
1663 }
1664
br_fill_linkxstats(struct sk_buff * skb,const struct net_device * dev,int * prividx,int attr)1665 static int br_fill_linkxstats(struct sk_buff *skb,
1666 const struct net_device *dev,
1667 int *prividx, int attr)
1668 {
1669 struct nlattr *nla __maybe_unused;
1670 struct net_bridge_port *p = NULL;
1671 struct net_bridge_vlan_group *vg;
1672 struct net_bridge_vlan *v;
1673 struct net_bridge *br;
1674 struct nlattr *nest;
1675 int vl_idx = 0;
1676
1677 switch (attr) {
1678 case IFLA_STATS_LINK_XSTATS:
1679 br = netdev_priv(dev);
1680 vg = br_vlan_group(br);
1681 break;
1682 case IFLA_STATS_LINK_XSTATS_SLAVE:
1683 p = br_port_get_rtnl(dev);
1684 if (!p)
1685 return 0;
1686 br = p->br;
1687 vg = nbp_vlan_group(p);
1688 break;
1689 default:
1690 return -EINVAL;
1691 }
1692
1693 nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE);
1694 if (!nest)
1695 return -EMSGSIZE;
1696
1697 if (vg) {
1698 u16 pvid;
1699
1700 pvid = br_get_pvid(vg);
1701 list_for_each_entry(v, &vg->vlan_list, vlist) {
1702 struct bridge_vlan_xstats vxi;
1703 struct pcpu_sw_netstats stats;
1704
1705 if (++vl_idx < *prividx)
1706 continue;
1707 memset(&vxi, 0, sizeof(vxi));
1708 vxi.vid = v->vid;
1709 vxi.flags = v->flags;
1710 if (v->vid == pvid)
1711 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1712 br_vlan_get_stats(v, &stats);
1713 vxi.rx_bytes = stats.rx_bytes;
1714 vxi.rx_packets = stats.rx_packets;
1715 vxi.tx_bytes = stats.tx_bytes;
1716 vxi.tx_packets = stats.tx_packets;
1717
1718 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1719 goto nla_put_failure;
1720 }
1721 }
1722
1723 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1724 if (++vl_idx >= *prividx) {
1725 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1726 sizeof(struct br_mcast_stats),
1727 BRIDGE_XSTATS_PAD);
1728 if (!nla)
1729 goto nla_put_failure;
1730 br_multicast_get_stats(br, p, nla_data(nla));
1731 }
1732 #endif
1733
1734 if (p) {
1735 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP,
1736 sizeof(p->stp_xstats),
1737 BRIDGE_XSTATS_PAD);
1738 if (!nla)
1739 goto nla_put_failure;
1740
1741 spin_lock_bh(&br->lock);
1742 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats));
1743 spin_unlock_bh(&br->lock);
1744 }
1745
1746 nla_nest_end(skb, nest);
1747 *prividx = 0;
1748
1749 return 0;
1750
1751 nla_put_failure:
1752 nla_nest_end(skb, nest);
1753 *prividx = vl_idx;
1754
1755 return -EMSGSIZE;
1756 }
1757
1758 static struct rtnl_af_ops br_af_ops __read_mostly = {
1759 .family = AF_BRIDGE,
1760 .get_link_af_size = br_get_link_af_size_filtered,
1761 };
1762
1763 struct rtnl_link_ops br_link_ops __read_mostly = {
1764 .kind = "bridge",
1765 .priv_size = sizeof(struct net_bridge),
1766 .setup = br_dev_setup,
1767 .maxtype = IFLA_BR_MAX,
1768 .policy = br_policy,
1769 .validate = br_validate,
1770 .newlink = br_dev_newlink,
1771 .changelink = br_changelink,
1772 .dellink = br_dev_delete,
1773 .get_size = br_get_size,
1774 .fill_info = br_fill_info,
1775 .fill_linkxstats = br_fill_linkxstats,
1776 .get_linkxstats_size = br_get_linkxstats_size,
1777
1778 .slave_maxtype = IFLA_BRPORT_MAX,
1779 .slave_policy = br_port_policy,
1780 .slave_changelink = br_port_slave_changelink,
1781 .get_slave_size = br_port_get_slave_size,
1782 .fill_slave_info = br_port_fill_slave_info,
1783 };
1784
br_netlink_init(void)1785 int __init br_netlink_init(void)
1786 {
1787 int err;
1788
1789 br_mdb_init();
1790 br_vlan_rtnl_init();
1791 rtnl_af_register(&br_af_ops);
1792
1793 err = rtnl_link_register(&br_link_ops);
1794 if (err)
1795 goto out_af;
1796
1797 return 0;
1798
1799 out_af:
1800 rtnl_af_unregister(&br_af_ops);
1801 br_mdb_uninit();
1802 return err;
1803 }
1804
br_netlink_fini(void)1805 void br_netlink_fini(void)
1806 {
1807 br_mdb_uninit();
1808 br_vlan_rtnl_uninit();
1809 rtnl_af_unregister(&br_af_ops);
1810 rtnl_link_unregister(&br_link_ops);
1811 }
1812