xref: /openbmc/linux/net/bridge/br_netlink.c (revision 60bfd345)
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 (netif_is_bridge_master(dev)) {
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 (p && vg && (filter_mask & RTEXT_FILTER_MST))
123 		vinfo_sz += br_mst_info_size(vg);
124 
125 	if (!(filter_mask & RTEXT_FILTER_CFM_STATUS))
126 		return vinfo_sz;
127 
128 	if (!br)
129 		return vinfo_sz;
130 
131 	/* CFM status info must be added */
132 	br_cfm_mep_count(br, &num_cfm_mep_infos);
133 	br_cfm_peer_mep_count(br, &num_cfm_peer_mep_infos);
134 
135 	vinfo_sz += nla_total_size(0);	/* IFLA_BRIDGE_CFM */
136 	/* For each status struct the MEP instance (u32) is added */
137 	/* MEP instance (u32) + br_cfm_mep_status */
138 	vinfo_sz += num_cfm_mep_infos *
139 		     /*IFLA_BRIDGE_CFM_MEP_STATUS_INSTANCE */
140 		    (nla_total_size(sizeof(u32))
141 		     /* IFLA_BRIDGE_CFM_MEP_STATUS_OPCODE_UNEXP_SEEN */
142 		     + nla_total_size(sizeof(u32))
143 		     /* IFLA_BRIDGE_CFM_MEP_STATUS_VERSION_UNEXP_SEEN */
144 		     + nla_total_size(sizeof(u32))
145 		     /* IFLA_BRIDGE_CFM_MEP_STATUS_RX_LEVEL_LOW_SEEN */
146 		     + nla_total_size(sizeof(u32)));
147 	/* MEP instance (u32) + br_cfm_cc_peer_status */
148 	vinfo_sz += num_cfm_peer_mep_infos *
149 		     /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_INSTANCE */
150 		    (nla_total_size(sizeof(u32))
151 		     /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_PEER_MEPID */
152 		     + nla_total_size(sizeof(u32))
153 		     /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_CCM_DEFECT */
154 		     + nla_total_size(sizeof(u32))
155 		     /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_RDI */
156 		     + nla_total_size(sizeof(u32))
157 		     /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_PORT_TLV_VALUE */
158 		     + nla_total_size(sizeof(u8))
159 		     /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_IF_TLV_VALUE */
160 		     + nla_total_size(sizeof(u8))
161 		     /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEEN */
162 		     + nla_total_size(sizeof(u32))
163 		     /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_TLV_SEEN */
164 		     + nla_total_size(sizeof(u32))
165 		     /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEQ_UNEXP_SEEN */
166 		     + nla_total_size(sizeof(u32)));
167 
168 	return vinfo_sz;
169 }
170 
br_port_info_size(void)171 static inline size_t br_port_info_size(void)
172 {
173 	return nla_total_size(1)	/* IFLA_BRPORT_STATE  */
174 		+ nla_total_size(2)	/* IFLA_BRPORT_PRIORITY */
175 		+ nla_total_size(4)	/* IFLA_BRPORT_COST */
176 		+ nla_total_size(1)	/* IFLA_BRPORT_MODE */
177 		+ nla_total_size(1)	/* IFLA_BRPORT_GUARD */
178 		+ nla_total_size(1)	/* IFLA_BRPORT_PROTECT */
179 		+ nla_total_size(1)	/* IFLA_BRPORT_FAST_LEAVE */
180 		+ nla_total_size(1)	/* IFLA_BRPORT_MCAST_TO_UCAST */
181 		+ nla_total_size(1)	/* IFLA_BRPORT_LEARNING */
182 		+ nla_total_size(1)	/* IFLA_BRPORT_UNICAST_FLOOD */
183 		+ nla_total_size(1)	/* IFLA_BRPORT_MCAST_FLOOD */
184 		+ nla_total_size(1)	/* IFLA_BRPORT_BCAST_FLOOD */
185 		+ nla_total_size(1)	/* IFLA_BRPORT_PROXYARP */
186 		+ nla_total_size(1)	/* IFLA_BRPORT_PROXYARP_WIFI */
187 		+ nla_total_size(1)	/* IFLA_BRPORT_VLAN_TUNNEL */
188 		+ nla_total_size(1)	/* IFLA_BRPORT_NEIGH_SUPPRESS */
189 		+ nla_total_size(1)	/* IFLA_BRPORT_ISOLATED */
190 		+ nla_total_size(1)	/* IFLA_BRPORT_LOCKED */
191 		+ nla_total_size(1)	/* IFLA_BRPORT_MAB */
192 		+ nla_total_size(1)	/* IFLA_BRPORT_NEIGH_VLAN_SUPPRESS */
193 		+ nla_total_size(sizeof(struct ifla_bridge_id))	/* IFLA_BRPORT_ROOT_ID */
194 		+ nla_total_size(sizeof(struct ifla_bridge_id))	/* IFLA_BRPORT_BRIDGE_ID */
195 		+ nla_total_size(sizeof(u16))	/* IFLA_BRPORT_DESIGNATED_PORT */
196 		+ nla_total_size(sizeof(u16))	/* IFLA_BRPORT_DESIGNATED_COST */
197 		+ nla_total_size(sizeof(u16))	/* IFLA_BRPORT_ID */
198 		+ nla_total_size(sizeof(u16))	/* IFLA_BRPORT_NO */
199 		+ nla_total_size(sizeof(u8))	/* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
200 		+ nla_total_size(sizeof(u8))	/* IFLA_BRPORT_CONFIG_PENDING */
201 		+ nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
202 		+ nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
203 		+ nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
204 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
205 		+ nla_total_size(sizeof(u8))	/* IFLA_BRPORT_MULTICAST_ROUTER */
206 		+ nla_total_size(sizeof(u32))	/* IFLA_BRPORT_MCAST_N_GROUPS */
207 		+ nla_total_size(sizeof(u32))	/* IFLA_BRPORT_MCAST_MAX_GROUPS */
208 #endif
209 		+ nla_total_size(sizeof(u16))	/* IFLA_BRPORT_GROUP_FWD_MASK */
210 		+ nla_total_size(sizeof(u8))	/* IFLA_BRPORT_MRP_RING_OPEN */
211 		+ nla_total_size(sizeof(u8))	/* IFLA_BRPORT_MRP_IN_OPEN */
212 		+ nla_total_size(sizeof(u32))	/* IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT */
213 		+ nla_total_size(sizeof(u32))	/* IFLA_BRPORT_MCAST_EHT_HOSTS_CNT */
214 		+ nla_total_size(sizeof(u32))	/* IFLA_BRPORT_BACKUP_NHID */
215 		+ 0;
216 }
217 
br_nlmsg_size(struct net_device * dev,u32 filter_mask)218 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
219 {
220 	return NLMSG_ALIGN(sizeof(struct ifinfomsg))
221 		+ nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
222 		+ nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
223 		+ nla_total_size(4) /* IFLA_MASTER */
224 		+ nla_total_size(4) /* IFLA_MTU */
225 		+ nla_total_size(4) /* IFLA_LINK */
226 		+ nla_total_size(1) /* IFLA_OPERSTATE */
227 		+ nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
228 		+ nla_total_size(br_get_link_af_size_filtered(dev,
229 				 filter_mask)) /* IFLA_AF_SPEC */
230 		+ nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */
231 }
232 
br_port_fill_attrs(struct sk_buff * skb,const struct net_bridge_port * p)233 static int br_port_fill_attrs(struct sk_buff *skb,
234 			      const struct net_bridge_port *p)
235 {
236 	u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
237 	struct net_bridge_port *backup_p;
238 	u64 timerval;
239 
240 	if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
241 	    nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
242 	    nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
243 	    nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
244 	    nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
245 	    nla_put_u8(skb, IFLA_BRPORT_PROTECT,
246 		       !!(p->flags & BR_ROOT_BLOCK)) ||
247 	    nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
248 		       !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
249 	    nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
250 		       !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
251 	    nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
252 	    nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
253 		       !!(p->flags & BR_FLOOD)) ||
254 	    nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
255 		       !!(p->flags & BR_MCAST_FLOOD)) ||
256 	    nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
257 		       !!(p->flags & BR_BCAST_FLOOD)) ||
258 	    nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
259 	    nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
260 		       !!(p->flags & BR_PROXYARP_WIFI)) ||
261 	    nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
262 		    &p->designated_root) ||
263 	    nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
264 		    &p->designated_bridge) ||
265 	    nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
266 	    nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
267 	    nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
268 	    nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
269 	    nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
270 		       p->topology_change_ack) ||
271 	    nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
272 	    nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
273 							BR_VLAN_TUNNEL)) ||
274 	    nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
275 	    nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
276 		       !!(p->flags & BR_NEIGH_SUPPRESS)) ||
277 	    nla_put_u8(skb, IFLA_BRPORT_MRP_RING_OPEN, !!(p->flags &
278 							  BR_MRP_LOST_CONT)) ||
279 	    nla_put_u8(skb, IFLA_BRPORT_MRP_IN_OPEN,
280 		       !!(p->flags & BR_MRP_LOST_IN_CONT)) ||
281 	    nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)) ||
282 	    nla_put_u8(skb, IFLA_BRPORT_LOCKED, !!(p->flags & BR_PORT_LOCKED)) ||
283 	    nla_put_u8(skb, IFLA_BRPORT_MAB, !!(p->flags & BR_PORT_MAB)) ||
284 	    nla_put_u8(skb, IFLA_BRPORT_NEIGH_VLAN_SUPPRESS,
285 		       !!(p->flags & BR_NEIGH_VLAN_SUPPRESS)))
286 		return -EMSGSIZE;
287 
288 	timerval = br_timer_value(&p->message_age_timer);
289 	if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
290 			      IFLA_BRPORT_PAD))
291 		return -EMSGSIZE;
292 	timerval = br_timer_value(&p->forward_delay_timer);
293 	if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
294 			      IFLA_BRPORT_PAD))
295 		return -EMSGSIZE;
296 	timerval = br_timer_value(&p->hold_timer);
297 	if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
298 			      IFLA_BRPORT_PAD))
299 		return -EMSGSIZE;
300 
301 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
302 	if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
303 		       p->multicast_ctx.multicast_router) ||
304 	    nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT,
305 			p->multicast_eht_hosts_limit) ||
306 	    nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_CNT,
307 			p->multicast_eht_hosts_cnt) ||
308 	    nla_put_u32(skb, IFLA_BRPORT_MCAST_N_GROUPS,
309 			br_multicast_ngroups_get(&p->multicast_ctx)) ||
310 	    nla_put_u32(skb, IFLA_BRPORT_MCAST_MAX_GROUPS,
311 			br_multicast_ngroups_get_max(&p->multicast_ctx)))
312 		return -EMSGSIZE;
313 #endif
314 
315 	/* we might be called only with br->lock */
316 	rcu_read_lock();
317 	backup_p = rcu_dereference(p->backup_port);
318 	if (backup_p)
319 		nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT,
320 			    backup_p->dev->ifindex);
321 	rcu_read_unlock();
322 
323 	if (p->backup_nhid &&
324 	    nla_put_u32(skb, IFLA_BRPORT_BACKUP_NHID, p->backup_nhid))
325 		return -EMSGSIZE;
326 
327 	return 0;
328 }
329 
br_fill_ifvlaninfo_range(struct sk_buff * skb,u16 vid_start,u16 vid_end,u16 flags)330 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
331 				    u16 vid_end, u16 flags)
332 {
333 	struct  bridge_vlan_info vinfo;
334 
335 	if ((vid_end - vid_start) > 0) {
336 		/* add range to skb */
337 		vinfo.vid = vid_start;
338 		vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
339 		if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
340 			    sizeof(vinfo), &vinfo))
341 			goto nla_put_failure;
342 
343 		vinfo.vid = vid_end;
344 		vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
345 		if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
346 			    sizeof(vinfo), &vinfo))
347 			goto nla_put_failure;
348 	} else {
349 		vinfo.vid = vid_start;
350 		vinfo.flags = flags;
351 		if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
352 			    sizeof(vinfo), &vinfo))
353 			goto nla_put_failure;
354 	}
355 
356 	return 0;
357 
358 nla_put_failure:
359 	return -EMSGSIZE;
360 }
361 
br_fill_ifvlaninfo_compressed(struct sk_buff * skb,struct net_bridge_vlan_group * vg)362 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
363 					 struct net_bridge_vlan_group *vg)
364 {
365 	struct net_bridge_vlan *v;
366 	u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
367 	u16 flags, pvid;
368 	int err = 0;
369 
370 	/* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
371 	 * and mark vlan info with begin and end flags
372 	 * if vlaninfo represents a range
373 	 */
374 	pvid = br_get_pvid(vg);
375 	list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
376 		flags = 0;
377 		if (!br_vlan_should_use(v))
378 			continue;
379 		if (v->vid == pvid)
380 			flags |= BRIDGE_VLAN_INFO_PVID;
381 
382 		if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
383 			flags |= BRIDGE_VLAN_INFO_UNTAGGED;
384 
385 		if (vid_range_start == 0) {
386 			goto initvars;
387 		} else if ((v->vid - vid_range_end) == 1 &&
388 			flags == vid_range_flags) {
389 			vid_range_end = v->vid;
390 			continue;
391 		} else {
392 			err = br_fill_ifvlaninfo_range(skb, vid_range_start,
393 						       vid_range_end,
394 						       vid_range_flags);
395 			if (err)
396 				return err;
397 		}
398 
399 initvars:
400 		vid_range_start = v->vid;
401 		vid_range_end = v->vid;
402 		vid_range_flags = flags;
403 	}
404 
405 	if (vid_range_start != 0) {
406 		/* Call it once more to send any left over vlans */
407 		err = br_fill_ifvlaninfo_range(skb, vid_range_start,
408 					       vid_range_end,
409 					       vid_range_flags);
410 		if (err)
411 			return err;
412 	}
413 
414 	return 0;
415 }
416 
br_fill_ifvlaninfo(struct sk_buff * skb,struct net_bridge_vlan_group * vg)417 static int br_fill_ifvlaninfo(struct sk_buff *skb,
418 			      struct net_bridge_vlan_group *vg)
419 {
420 	struct bridge_vlan_info vinfo;
421 	struct net_bridge_vlan *v;
422 	u16 pvid;
423 
424 	pvid = br_get_pvid(vg);
425 	list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
426 		if (!br_vlan_should_use(v))
427 			continue;
428 
429 		vinfo.vid = v->vid;
430 		vinfo.flags = 0;
431 		if (v->vid == pvid)
432 			vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
433 
434 		if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
435 			vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
436 
437 		if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
438 			    sizeof(vinfo), &vinfo))
439 			goto nla_put_failure;
440 	}
441 
442 	return 0;
443 
444 nla_put_failure:
445 	return -EMSGSIZE;
446 }
447 
448 /*
449  * Create one netlink message for one interface
450  * Contains port and master info as well as carrier and bridge state.
451  */
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)452 static int br_fill_ifinfo(struct sk_buff *skb,
453 			  const struct net_bridge_port *port,
454 			  u32 pid, u32 seq, int event, unsigned int flags,
455 			  u32 filter_mask, const struct net_device *dev,
456 			  bool getlink)
457 {
458 	u8 operstate = netif_running(dev) ? READ_ONCE(dev->operstate) :
459 					    IF_OPER_DOWN;
460 	struct nlattr *af = NULL;
461 	struct net_bridge *br;
462 	struct ifinfomsg *hdr;
463 	struct nlmsghdr *nlh;
464 
465 	if (port)
466 		br = port->br;
467 	else
468 		br = netdev_priv(dev);
469 
470 	br_debug(br, "br_fill_info event %d port %s master %s\n",
471 		     event, dev->name, br->dev->name);
472 
473 	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
474 	if (nlh == NULL)
475 		return -EMSGSIZE;
476 
477 	hdr = nlmsg_data(nlh);
478 	hdr->ifi_family = AF_BRIDGE;
479 	hdr->__ifi_pad = 0;
480 	hdr->ifi_type = dev->type;
481 	hdr->ifi_index = dev->ifindex;
482 	hdr->ifi_flags = dev_get_flags(dev);
483 	hdr->ifi_change = 0;
484 
485 	if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
486 	    nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
487 	    nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
488 	    nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
489 	    (dev->addr_len &&
490 	     nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
491 	    (dev->ifindex != dev_get_iflink(dev) &&
492 	     nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
493 		goto nla_put_failure;
494 
495 	if (event == RTM_NEWLINK && port) {
496 		struct nlattr *nest;
497 
498 		nest = nla_nest_start(skb, IFLA_PROTINFO);
499 		if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
500 			goto nla_put_failure;
501 		nla_nest_end(skb, nest);
502 	}
503 
504 	if (filter_mask & (RTEXT_FILTER_BRVLAN |
505 			   RTEXT_FILTER_BRVLAN_COMPRESSED |
506 			   RTEXT_FILTER_MRP |
507 			   RTEXT_FILTER_CFM_CONFIG |
508 			   RTEXT_FILTER_CFM_STATUS |
509 			   RTEXT_FILTER_MST)) {
510 		af = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
511 		if (!af)
512 			goto nla_put_failure;
513 	}
514 
515 	/* Check if  the VID information is requested */
516 	if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
517 	    (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
518 		struct net_bridge_vlan_group *vg;
519 		int err;
520 
521 		/* RCU needed because of the VLAN locking rules (rcu || rtnl) */
522 		rcu_read_lock();
523 		if (port)
524 			vg = nbp_vlan_group_rcu(port);
525 		else
526 			vg = br_vlan_group_rcu(br);
527 
528 		if (!vg || !vg->num_vlans) {
529 			rcu_read_unlock();
530 			goto done;
531 		}
532 		if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
533 			err = br_fill_ifvlaninfo_compressed(skb, vg);
534 		else
535 			err = br_fill_ifvlaninfo(skb, vg);
536 
537 		if (port && (port->flags & BR_VLAN_TUNNEL))
538 			err = br_fill_vlan_tunnel_info(skb, vg);
539 		rcu_read_unlock();
540 		if (err)
541 			goto nla_put_failure;
542 	}
543 
544 	if (filter_mask & RTEXT_FILTER_MRP) {
545 		int err;
546 
547 		if (!br_mrp_enabled(br) || port)
548 			goto done;
549 
550 		rcu_read_lock();
551 		err = br_mrp_fill_info(skb, br);
552 		rcu_read_unlock();
553 
554 		if (err)
555 			goto nla_put_failure;
556 	}
557 
558 	if (filter_mask & (RTEXT_FILTER_CFM_CONFIG | RTEXT_FILTER_CFM_STATUS)) {
559 		struct nlattr *cfm_nest = NULL;
560 		int err;
561 
562 		if (!br_cfm_created(br) || port)
563 			goto done;
564 
565 		cfm_nest = nla_nest_start(skb, IFLA_BRIDGE_CFM);
566 		if (!cfm_nest)
567 			goto nla_put_failure;
568 
569 		if (filter_mask & RTEXT_FILTER_CFM_CONFIG) {
570 			rcu_read_lock();
571 			err = br_cfm_config_fill_info(skb, br);
572 			rcu_read_unlock();
573 			if (err)
574 				goto nla_put_failure;
575 		}
576 
577 		if (filter_mask & RTEXT_FILTER_CFM_STATUS) {
578 			rcu_read_lock();
579 			err = br_cfm_status_fill_info(skb, br, getlink);
580 			rcu_read_unlock();
581 			if (err)
582 				goto nla_put_failure;
583 		}
584 
585 		nla_nest_end(skb, cfm_nest);
586 	}
587 
588 	if ((filter_mask & RTEXT_FILTER_MST) &&
589 	    br_opt_get(br, BROPT_MST_ENABLED) && port) {
590 		const struct net_bridge_vlan_group *vg = nbp_vlan_group(port);
591 		struct nlattr *mst_nest;
592 		int err;
593 
594 		if (!vg || !vg->num_vlans)
595 			goto done;
596 
597 		mst_nest = nla_nest_start(skb, IFLA_BRIDGE_MST);
598 		if (!mst_nest)
599 			goto nla_put_failure;
600 
601 		err = br_mst_fill_info(skb, vg);
602 		if (err)
603 			goto nla_put_failure;
604 
605 		nla_nest_end(skb, mst_nest);
606 	}
607 
608 done:
609 	if (af) {
610 		if (nlmsg_get_pos(skb) - (void *)af > nla_attr_size(0))
611 			nla_nest_end(skb, af);
612 		else
613 			nla_nest_cancel(skb, af);
614 	}
615 
616 	nlmsg_end(skb, nlh);
617 	return 0;
618 
619 nla_put_failure:
620 	nlmsg_cancel(skb, nlh);
621 	return -EMSGSIZE;
622 }
623 
br_info_notify(int event,const struct net_bridge * br,const struct net_bridge_port * port,u32 filter)624 void br_info_notify(int event, const struct net_bridge *br,
625 		    const struct net_bridge_port *port, u32 filter)
626 {
627 	struct net_device *dev;
628 	struct sk_buff *skb;
629 	int err = -ENOBUFS;
630 	struct net *net;
631 	u16 port_no = 0;
632 
633 	if (WARN_ON(!port && !br))
634 		return;
635 
636 	if (port) {
637 		dev = port->dev;
638 		br = port->br;
639 		port_no = port->port_no;
640 	} else {
641 		dev = br->dev;
642 	}
643 
644 	net = dev_net(dev);
645 	br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
646 
647 	skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
648 	if (skb == NULL)
649 		goto errout;
650 
651 	err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev, false);
652 	if (err < 0) {
653 		/* -EMSGSIZE implies BUG in br_nlmsg_size() */
654 		WARN_ON(err == -EMSGSIZE);
655 		kfree_skb(skb);
656 		goto errout;
657 	}
658 	rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
659 	return;
660 errout:
661 	rtnl_set_sk_err(net, RTNLGRP_LINK, err);
662 }
663 
664 /* 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)665 void br_ifinfo_notify(int event, const struct net_bridge *br,
666 		      const struct net_bridge_port *port)
667 {
668 	u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
669 
670 	br_info_notify(event, br, port, filter);
671 }
672 
673 /*
674  * Dump information about all ports, in response to GETLINK
675  */
br_getlink(struct sk_buff * skb,u32 pid,u32 seq,struct net_device * dev,u32 filter_mask,int nlflags)676 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
677 	       struct net_device *dev, u32 filter_mask, int nlflags)
678 {
679 	struct net_bridge_port *port = br_port_get_rtnl(dev);
680 
681 	if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
682 	    !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) &&
683 	    !(filter_mask & RTEXT_FILTER_MRP) &&
684 	    !(filter_mask & RTEXT_FILTER_CFM_CONFIG) &&
685 	    !(filter_mask & RTEXT_FILTER_CFM_STATUS))
686 		return 0;
687 
688 	return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
689 			      filter_mask, dev, true);
690 }
691 
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)692 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
693 			int cmd, struct bridge_vlan_info *vinfo, bool *changed,
694 			struct netlink_ext_ack *extack)
695 {
696 	bool curr_change;
697 	int err = 0;
698 
699 	switch (cmd) {
700 	case RTM_SETLINK:
701 		if (p) {
702 			/* if the MASTER flag is set this will act on the global
703 			 * per-VLAN entry as well
704 			 */
705 			err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
706 					   &curr_change, extack);
707 		} else {
708 			vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
709 			err = br_vlan_add(br, vinfo->vid, vinfo->flags,
710 					  &curr_change, extack);
711 		}
712 		if (curr_change)
713 			*changed = true;
714 		break;
715 
716 	case RTM_DELLINK:
717 		if (p) {
718 			if (!nbp_vlan_delete(p, vinfo->vid))
719 				*changed = true;
720 
721 			if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
722 			    !br_vlan_delete(p->br, vinfo->vid))
723 				*changed = true;
724 		} else if (!br_vlan_delete(br, vinfo->vid)) {
725 			*changed = true;
726 		}
727 		break;
728 	}
729 
730 	return err;
731 }
732 
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)733 int br_process_vlan_info(struct net_bridge *br,
734 			 struct net_bridge_port *p, int cmd,
735 			 struct bridge_vlan_info *vinfo_curr,
736 			 struct bridge_vlan_info **vinfo_last,
737 			 bool *changed,
738 			 struct netlink_ext_ack *extack)
739 {
740 	int err, rtm_cmd;
741 
742 	if (!br_vlan_valid_id(vinfo_curr->vid, extack))
743 		return -EINVAL;
744 
745 	/* needed for vlan-only NEWVLAN/DELVLAN notifications */
746 	rtm_cmd = br_afspec_cmd_to_rtm(cmd);
747 
748 	if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
749 		if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
750 			return -EINVAL;
751 		*vinfo_last = vinfo_curr;
752 		return 0;
753 	}
754 
755 	if (*vinfo_last) {
756 		struct bridge_vlan_info tmp_vinfo;
757 		int v, v_change_start = 0;
758 
759 		if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
760 			return -EINVAL;
761 
762 		memcpy(&tmp_vinfo, *vinfo_last,
763 		       sizeof(struct bridge_vlan_info));
764 		for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
765 			bool curr_change = false;
766 
767 			tmp_vinfo.vid = v;
768 			err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change,
769 					   extack);
770 			if (err)
771 				break;
772 			if (curr_change) {
773 				*changed = curr_change;
774 				if (!v_change_start)
775 					v_change_start = v;
776 			} else {
777 				/* nothing to notify yet */
778 				if (!v_change_start)
779 					continue;
780 				br_vlan_notify(br, p, v_change_start,
781 					       v - 1, rtm_cmd);
782 				v_change_start = 0;
783 			}
784 			cond_resched();
785 		}
786 		/* v_change_start is set only if the last/whole range changed */
787 		if (v_change_start)
788 			br_vlan_notify(br, p, v_change_start,
789 				       v - 1, rtm_cmd);
790 
791 		*vinfo_last = NULL;
792 
793 		return err;
794 	}
795 
796 	err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
797 	if (*changed)
798 		br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd);
799 
800 	return err;
801 }
802 
br_afspec(struct net_bridge * br,struct net_bridge_port * p,struct nlattr * af_spec,int cmd,bool * changed,struct netlink_ext_ack * extack)803 static int br_afspec(struct net_bridge *br,
804 		     struct net_bridge_port *p,
805 		     struct nlattr *af_spec,
806 		     int cmd, bool *changed,
807 		     struct netlink_ext_ack *extack)
808 {
809 	struct bridge_vlan_info *vinfo_curr = NULL;
810 	struct bridge_vlan_info *vinfo_last = NULL;
811 	struct nlattr *attr;
812 	struct vtunnel_info tinfo_last = {};
813 	struct vtunnel_info tinfo_curr = {};
814 	int err = 0, rem;
815 
816 	nla_for_each_nested(attr, af_spec, rem) {
817 		err = 0;
818 		switch (nla_type(attr)) {
819 		case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
820 			if (!p || !(p->flags & BR_VLAN_TUNNEL))
821 				return -EINVAL;
822 			err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
823 			if (err)
824 				return err;
825 			err = br_process_vlan_tunnel_info(br, p, cmd,
826 							  &tinfo_curr,
827 							  &tinfo_last,
828 							  changed);
829 			if (err)
830 				return err;
831 			break;
832 		case IFLA_BRIDGE_VLAN_INFO:
833 			if (nla_len(attr) != sizeof(struct bridge_vlan_info))
834 				return -EINVAL;
835 			vinfo_curr = nla_data(attr);
836 			err = br_process_vlan_info(br, p, cmd, vinfo_curr,
837 						   &vinfo_last, changed,
838 						   extack);
839 			if (err)
840 				return err;
841 			break;
842 		case IFLA_BRIDGE_MRP:
843 			err = br_mrp_parse(br, p, attr, cmd, extack);
844 			if (err)
845 				return err;
846 			break;
847 		case IFLA_BRIDGE_CFM:
848 			err = br_cfm_parse(br, p, attr, cmd, extack);
849 			if (err)
850 				return err;
851 			break;
852 		case IFLA_BRIDGE_MST:
853 			if (!p) {
854 				NL_SET_ERR_MSG(extack,
855 					       "MST states can only be set on bridge ports");
856 				return -EINVAL;
857 			}
858 
859 			if (cmd != RTM_SETLINK) {
860 				NL_SET_ERR_MSG(extack,
861 					       "MST states can only be set through RTM_SETLINK");
862 				return -EINVAL;
863 			}
864 
865 			err = br_mst_process(p, attr, extack);
866 			if (err)
867 				return err;
868 			break;
869 		}
870 	}
871 
872 	return err;
873 }
874 
875 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
876 	[IFLA_BRPORT_UNSPEC]	= { .strict_start_type =
877 					IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT + 1 },
878 	[IFLA_BRPORT_STATE]	= { .type = NLA_U8 },
879 	[IFLA_BRPORT_COST]	= { .type = NLA_U32 },
880 	[IFLA_BRPORT_PRIORITY]	= { .type = NLA_U16 },
881 	[IFLA_BRPORT_MODE]	= { .type = NLA_U8 },
882 	[IFLA_BRPORT_GUARD]	= { .type = NLA_U8 },
883 	[IFLA_BRPORT_PROTECT]	= { .type = NLA_U8 },
884 	[IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
885 	[IFLA_BRPORT_LEARNING]	= { .type = NLA_U8 },
886 	[IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
887 	[IFLA_BRPORT_PROXYARP]	= { .type = NLA_U8 },
888 	[IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
889 	[IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
890 	[IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
891 	[IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
892 	[IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
893 	[IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
894 	[IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
895 	[IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
896 	[IFLA_BRPORT_ISOLATED]	= { .type = NLA_U8 },
897 	[IFLA_BRPORT_LOCKED] = { .type = NLA_U8 },
898 	[IFLA_BRPORT_MAB] = { .type = NLA_U8 },
899 	[IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
900 	[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT] = { .type = NLA_U32 },
901 	[IFLA_BRPORT_MCAST_N_GROUPS] = { .type = NLA_REJECT },
902 	[IFLA_BRPORT_MCAST_MAX_GROUPS] = { .type = NLA_U32 },
903 	[IFLA_BRPORT_NEIGH_VLAN_SUPPRESS] = NLA_POLICY_MAX(NLA_U8, 1),
904 	[IFLA_BRPORT_BACKUP_NHID] = { .type = NLA_U32 },
905 };
906 
907 /* Change the state of the port and notify spanning tree */
br_set_port_state(struct net_bridge_port * p,u8 state)908 static int br_set_port_state(struct net_bridge_port *p, u8 state)
909 {
910 	if (state > BR_STATE_BLOCKING)
911 		return -EINVAL;
912 
913 	/* if kernel STP is running, don't allow changes */
914 	if (p->br->stp_enabled == BR_KERNEL_STP)
915 		return -EBUSY;
916 
917 	/* if device is not up, change is not allowed
918 	 * if link is not present, only allowable state is disabled
919 	 */
920 	if (!netif_running(p->dev) ||
921 	    (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
922 		return -ENETDOWN;
923 
924 	br_set_state(p, state);
925 	br_port_state_selection(p->br);
926 	return 0;
927 }
928 
929 /* 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)930 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
931 			     int attrtype, unsigned long mask)
932 {
933 	if (!tb[attrtype])
934 		return;
935 
936 	if (nla_get_u8(tb[attrtype]))
937 		p->flags |= mask;
938 	else
939 		p->flags &= ~mask;
940 }
941 
942 /* Process bridge protocol info on port */
br_setport(struct net_bridge_port * p,struct nlattr * tb[],struct netlink_ext_ack * extack)943 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[],
944 		      struct netlink_ext_ack *extack)
945 {
946 	unsigned long old_flags, changed_mask;
947 	bool br_vlan_tunnel_old;
948 	int err;
949 
950 	old_flags = p->flags;
951 	br_vlan_tunnel_old = (old_flags & BR_VLAN_TUNNEL) ? true : false;
952 
953 	br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
954 	br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
955 	br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE,
956 			 BR_MULTICAST_FAST_LEAVE);
957 	br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
958 	br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
959 	br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
960 	br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
961 	br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST,
962 			 BR_MULTICAST_TO_UNICAST);
963 	br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
964 	br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
965 	br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
966 	br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
967 	br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS, BR_NEIGH_SUPPRESS);
968 	br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
969 	br_set_port_flag(p, tb, IFLA_BRPORT_LOCKED, BR_PORT_LOCKED);
970 	br_set_port_flag(p, tb, IFLA_BRPORT_MAB, BR_PORT_MAB);
971 	br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_VLAN_SUPPRESS,
972 			 BR_NEIGH_VLAN_SUPPRESS);
973 
974 	if ((p->flags & BR_PORT_MAB) &&
975 	    (!(p->flags & BR_PORT_LOCKED) || !(p->flags & BR_LEARNING))) {
976 		NL_SET_ERR_MSG(extack, "Bridge port must be locked and have learning enabled when MAB is enabled");
977 		p->flags = old_flags;
978 		return -EINVAL;
979 	} else if (!(p->flags & BR_PORT_MAB) && (old_flags & BR_PORT_MAB)) {
980 		struct net_bridge_fdb_flush_desc desc = {
981 			.flags = BIT(BR_FDB_LOCKED),
982 			.flags_mask = BIT(BR_FDB_LOCKED),
983 			.port_ifindex = p->dev->ifindex,
984 		};
985 
986 		br_fdb_flush(p->br, &desc);
987 	}
988 
989 	changed_mask = old_flags ^ p->flags;
990 
991 	err = br_switchdev_set_port_flag(p, p->flags, changed_mask, extack);
992 	if (err) {
993 		p->flags = old_flags;
994 		return err;
995 	}
996 
997 	if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
998 		nbp_vlan_tunnel_info_flush(p);
999 
1000 	br_port_flags_change(p, changed_mask);
1001 
1002 	if (tb[IFLA_BRPORT_COST]) {
1003 		err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
1004 		if (err)
1005 			return err;
1006 	}
1007 
1008 	if (tb[IFLA_BRPORT_PRIORITY]) {
1009 		err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
1010 		if (err)
1011 			return err;
1012 	}
1013 
1014 	if (tb[IFLA_BRPORT_STATE]) {
1015 		err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
1016 		if (err)
1017 			return err;
1018 	}
1019 
1020 	if (tb[IFLA_BRPORT_FLUSH])
1021 		br_fdb_delete_by_port(p->br, p, 0, 0);
1022 
1023 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1024 	if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
1025 		u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
1026 
1027 		err = br_multicast_set_port_router(&p->multicast_ctx,
1028 						   mcast_router);
1029 		if (err)
1030 			return err;
1031 	}
1032 
1033 	if (tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]) {
1034 		u32 hlimit;
1035 
1036 		hlimit = nla_get_u32(tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]);
1037 		err = br_multicast_eht_set_hosts_limit(p, hlimit);
1038 		if (err)
1039 			return err;
1040 	}
1041 
1042 	if (tb[IFLA_BRPORT_MCAST_MAX_GROUPS]) {
1043 		u32 max_groups;
1044 
1045 		max_groups = nla_get_u32(tb[IFLA_BRPORT_MCAST_MAX_GROUPS]);
1046 		br_multicast_ngroups_set_max(&p->multicast_ctx, max_groups);
1047 	}
1048 #endif
1049 
1050 	if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
1051 		u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
1052 
1053 		if (fwd_mask & BR_GROUPFWD_MACPAUSE)
1054 			return -EINVAL;
1055 		p->group_fwd_mask = fwd_mask;
1056 	}
1057 
1058 	if (tb[IFLA_BRPORT_BACKUP_PORT]) {
1059 		struct net_device *backup_dev = NULL;
1060 		u32 backup_ifindex;
1061 
1062 		backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
1063 		if (backup_ifindex) {
1064 			backup_dev = __dev_get_by_index(dev_net(p->dev),
1065 							backup_ifindex);
1066 			if (!backup_dev)
1067 				return -ENOENT;
1068 		}
1069 
1070 		err = nbp_backup_change(p, backup_dev);
1071 		if (err)
1072 			return err;
1073 	}
1074 
1075 	if (tb[IFLA_BRPORT_BACKUP_NHID]) {
1076 		u32 backup_nhid = nla_get_u32(tb[IFLA_BRPORT_BACKUP_NHID]);
1077 
1078 		WRITE_ONCE(p->backup_nhid, backup_nhid);
1079 	}
1080 
1081 	return 0;
1082 }
1083 
1084 /* Change state and parameters on port. */
br_setlink(struct net_device * dev,struct nlmsghdr * nlh,u16 flags,struct netlink_ext_ack * extack)1085 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags,
1086 	       struct netlink_ext_ack *extack)
1087 {
1088 	struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
1089 	struct nlattr *tb[IFLA_BRPORT_MAX + 1];
1090 	struct net_bridge_port *p;
1091 	struct nlattr *protinfo;
1092 	struct nlattr *afspec;
1093 	bool changed = false;
1094 	int err = 0;
1095 
1096 	protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
1097 	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
1098 	if (!protinfo && !afspec)
1099 		return 0;
1100 
1101 	p = br_port_get_rtnl(dev);
1102 	/* We want to accept dev as bridge itself if the AF_SPEC
1103 	 * is set to see if someone is setting vlan info on the bridge
1104 	 */
1105 	if (!p && !afspec)
1106 		return -EINVAL;
1107 
1108 	if (p && protinfo) {
1109 		if (protinfo->nla_type & NLA_F_NESTED) {
1110 			err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX,
1111 							  protinfo,
1112 							  br_port_policy,
1113 							  NULL);
1114 			if (err)
1115 				return err;
1116 
1117 			spin_lock_bh(&p->br->lock);
1118 			err = br_setport(p, tb, extack);
1119 			spin_unlock_bh(&p->br->lock);
1120 		} else {
1121 			/* Binary compatibility with old RSTP */
1122 			if (nla_len(protinfo) < sizeof(u8))
1123 				return -EINVAL;
1124 
1125 			spin_lock_bh(&p->br->lock);
1126 			err = br_set_port_state(p, nla_get_u8(protinfo));
1127 			spin_unlock_bh(&p->br->lock);
1128 		}
1129 		if (err)
1130 			goto out;
1131 		changed = true;
1132 	}
1133 
1134 	if (afspec)
1135 		err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
1136 
1137 	if (changed)
1138 		br_ifinfo_notify(RTM_NEWLINK, br, p);
1139 out:
1140 	return err;
1141 }
1142 
1143 /* Delete port information */
br_dellink(struct net_device * dev,struct nlmsghdr * nlh,u16 flags)1144 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
1145 {
1146 	struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
1147 	struct net_bridge_port *p;
1148 	struct nlattr *afspec;
1149 	bool changed = false;
1150 	int err = 0;
1151 
1152 	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
1153 	if (!afspec)
1154 		return 0;
1155 
1156 	p = br_port_get_rtnl(dev);
1157 	/* We want to accept dev as bridge itself as well */
1158 	if (!p && !netif_is_bridge_master(dev))
1159 		return -EINVAL;
1160 
1161 	err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL);
1162 	if (changed)
1163 		/* Send RTM_NEWLINK because userspace
1164 		 * expects RTM_NEWLINK for vlan dels
1165 		 */
1166 		br_ifinfo_notify(RTM_NEWLINK, br, p);
1167 
1168 	return err;
1169 }
1170 
br_validate(struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)1171 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
1172 		       struct netlink_ext_ack *extack)
1173 {
1174 	if (tb[IFLA_ADDRESS]) {
1175 		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1176 			return -EINVAL;
1177 		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1178 			return -EADDRNOTAVAIL;
1179 	}
1180 
1181 	if (!data)
1182 		return 0;
1183 
1184 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1185 	if (data[IFLA_BR_VLAN_PROTOCOL] &&
1186 	    !eth_type_vlan(nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])))
1187 		return -EPROTONOSUPPORT;
1188 
1189 	if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1190 		__u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1191 
1192 		if (defpvid >= VLAN_VID_MASK)
1193 			return -EINVAL;
1194 	}
1195 #endif
1196 
1197 	return 0;
1198 }
1199 
br_port_slave_changelink(struct net_device * brdev,struct net_device * dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)1200 static int br_port_slave_changelink(struct net_device *brdev,
1201 				    struct net_device *dev,
1202 				    struct nlattr *tb[],
1203 				    struct nlattr *data[],
1204 				    struct netlink_ext_ack *extack)
1205 {
1206 	struct net_bridge *br = netdev_priv(brdev);
1207 	int ret;
1208 
1209 	if (!data)
1210 		return 0;
1211 
1212 	spin_lock_bh(&br->lock);
1213 	ret = br_setport(br_port_get_rtnl(dev), data, extack);
1214 	spin_unlock_bh(&br->lock);
1215 
1216 	return ret;
1217 }
1218 
br_port_fill_slave_info(struct sk_buff * skb,const struct net_device * brdev,const struct net_device * dev)1219 static int br_port_fill_slave_info(struct sk_buff *skb,
1220 				   const struct net_device *brdev,
1221 				   const struct net_device *dev)
1222 {
1223 	return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
1224 }
1225 
br_port_get_slave_size(const struct net_device * brdev,const struct net_device * dev)1226 static size_t br_port_get_slave_size(const struct net_device *brdev,
1227 				     const struct net_device *dev)
1228 {
1229 	return br_port_info_size();
1230 }
1231 
1232 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1233 	[IFLA_BR_FORWARD_DELAY]	= { .type = NLA_U32 },
1234 	[IFLA_BR_HELLO_TIME]	= { .type = NLA_U32 },
1235 	[IFLA_BR_MAX_AGE]	= { .type = NLA_U32 },
1236 	[IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1237 	[IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1238 	[IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1239 	[IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1240 	[IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1241 	[IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1242 	[IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1243 				 .len  = ETH_ALEN },
1244 	[IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1245 	[IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1246 	[IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1247 	[IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1248 	[IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1249 	[IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1250 	[IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1251 	[IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1252 	[IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1253 	[IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1254 	[IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1255 	[IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1256 	[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1257 	[IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1258 	[IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1259 	[IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1260 	[IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1261 	[IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1262 	[IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1263 	[IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1264 	[IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1265 	[IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1266 	[IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1267 	[IFLA_BR_MULTI_BOOLOPT] =
1268 		NLA_POLICY_EXACT_LEN(sizeof(struct br_boolopt_multi)),
1269 };
1270 
br_changelink(struct net_device * brdev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)1271 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1272 			 struct nlattr *data[],
1273 			 struct netlink_ext_ack *extack)
1274 {
1275 	struct net_bridge *br = netdev_priv(brdev);
1276 	int err;
1277 
1278 	if (!data)
1279 		return 0;
1280 
1281 	if (data[IFLA_BR_FORWARD_DELAY]) {
1282 		err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1283 		if (err)
1284 			return err;
1285 	}
1286 
1287 	if (data[IFLA_BR_HELLO_TIME]) {
1288 		err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1289 		if (err)
1290 			return err;
1291 	}
1292 
1293 	if (data[IFLA_BR_MAX_AGE]) {
1294 		err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1295 		if (err)
1296 			return err;
1297 	}
1298 
1299 	if (data[IFLA_BR_AGEING_TIME]) {
1300 		err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1301 		if (err)
1302 			return err;
1303 	}
1304 
1305 	if (data[IFLA_BR_STP_STATE]) {
1306 		u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1307 
1308 		err = br_stp_set_enabled(br, stp_enabled, extack);
1309 		if (err)
1310 			return err;
1311 	}
1312 
1313 	if (data[IFLA_BR_PRIORITY]) {
1314 		u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1315 
1316 		br_stp_set_bridge_priority(br, priority);
1317 	}
1318 
1319 	if (data[IFLA_BR_VLAN_FILTERING]) {
1320 		u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1321 
1322 		err = br_vlan_filter_toggle(br, vlan_filter, extack);
1323 		if (err)
1324 			return err;
1325 	}
1326 
1327 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1328 	if (data[IFLA_BR_VLAN_PROTOCOL]) {
1329 		__be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1330 
1331 		err = __br_vlan_set_proto(br, vlan_proto, extack);
1332 		if (err)
1333 			return err;
1334 	}
1335 
1336 	if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1337 		__u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1338 
1339 		err = __br_vlan_set_default_pvid(br, defpvid, extack);
1340 		if (err)
1341 			return err;
1342 	}
1343 
1344 	if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1345 		__u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1346 
1347 		err = br_vlan_set_stats(br, vlan_stats);
1348 		if (err)
1349 			return err;
1350 	}
1351 
1352 	if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1353 		__u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1354 
1355 		err = br_vlan_set_stats_per_port(br, per_port);
1356 		if (err)
1357 			return err;
1358 	}
1359 #endif
1360 
1361 	if (data[IFLA_BR_GROUP_FWD_MASK]) {
1362 		u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1363 
1364 		if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1365 			return -EINVAL;
1366 		br->group_fwd_mask = fwd_mask;
1367 	}
1368 
1369 	if (data[IFLA_BR_GROUP_ADDR]) {
1370 		u8 new_addr[ETH_ALEN];
1371 
1372 		if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1373 			return -EINVAL;
1374 		memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1375 		if (!is_link_local_ether_addr(new_addr))
1376 			return -EINVAL;
1377 		if (new_addr[5] == 1 ||		/* 802.3x Pause address */
1378 		    new_addr[5] == 2 ||		/* 802.3ad Slow protocols */
1379 		    new_addr[5] == 3)		/* 802.1X PAE address */
1380 			return -EINVAL;
1381 		spin_lock_bh(&br->lock);
1382 		memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1383 		spin_unlock_bh(&br->lock);
1384 		br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1385 		br_recalculate_fwd_mask(br);
1386 	}
1387 
1388 	if (data[IFLA_BR_FDB_FLUSH]) {
1389 		struct net_bridge_fdb_flush_desc desc = {
1390 			.flags_mask = BIT(BR_FDB_STATIC)
1391 		};
1392 
1393 		br_fdb_flush(br, &desc);
1394 	}
1395 
1396 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1397 	if (data[IFLA_BR_MCAST_ROUTER]) {
1398 		u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1399 
1400 		err = br_multicast_set_router(&br->multicast_ctx,
1401 					      multicast_router);
1402 		if (err)
1403 			return err;
1404 	}
1405 
1406 	if (data[IFLA_BR_MCAST_SNOOPING]) {
1407 		u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1408 
1409 		err = br_multicast_toggle(br, mcast_snooping, extack);
1410 		if (err)
1411 			return err;
1412 	}
1413 
1414 	if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1415 		u8 val;
1416 
1417 		val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1418 		br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1419 	}
1420 
1421 	if (data[IFLA_BR_MCAST_QUERIER]) {
1422 		u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1423 
1424 		err = br_multicast_set_querier(&br->multicast_ctx,
1425 					       mcast_querier);
1426 		if (err)
1427 			return err;
1428 	}
1429 
1430 	if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
1431 		br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
1432 			RHT_ELASTICITY);
1433 
1434 	if (data[IFLA_BR_MCAST_HASH_MAX])
1435 		br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1436 
1437 	if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1438 		u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1439 
1440 		br->multicast_ctx.multicast_last_member_count = val;
1441 	}
1442 
1443 	if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1444 		u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1445 
1446 		br->multicast_ctx.multicast_startup_query_count = val;
1447 	}
1448 
1449 	if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1450 		u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1451 
1452 		br->multicast_ctx.multicast_last_member_interval = clock_t_to_jiffies(val);
1453 	}
1454 
1455 	if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1456 		u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1457 
1458 		br->multicast_ctx.multicast_membership_interval = clock_t_to_jiffies(val);
1459 	}
1460 
1461 	if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1462 		u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1463 
1464 		br->multicast_ctx.multicast_querier_interval = clock_t_to_jiffies(val);
1465 	}
1466 
1467 	if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1468 		u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1469 
1470 		br_multicast_set_query_intvl(&br->multicast_ctx, val);
1471 	}
1472 
1473 	if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1474 		u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1475 
1476 		br->multicast_ctx.multicast_query_response_interval = clock_t_to_jiffies(val);
1477 	}
1478 
1479 	if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1480 		u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1481 
1482 		br_multicast_set_startup_query_intvl(&br->multicast_ctx, val);
1483 	}
1484 
1485 	if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1486 		__u8 mcast_stats;
1487 
1488 		mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1489 		br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1490 	}
1491 
1492 	if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1493 		__u8 igmp_version;
1494 
1495 		igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1496 		err = br_multicast_set_igmp_version(&br->multicast_ctx,
1497 						    igmp_version);
1498 		if (err)
1499 			return err;
1500 	}
1501 
1502 #if IS_ENABLED(CONFIG_IPV6)
1503 	if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1504 		__u8 mld_version;
1505 
1506 		mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1507 		err = br_multicast_set_mld_version(&br->multicast_ctx,
1508 						   mld_version);
1509 		if (err)
1510 			return err;
1511 	}
1512 #endif
1513 #endif
1514 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1515 	if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1516 		u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1517 
1518 		br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1519 	}
1520 
1521 	if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1522 		u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1523 
1524 		br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1525 	}
1526 
1527 	if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1528 		u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1529 
1530 		br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1531 	}
1532 #endif
1533 
1534 	if (data[IFLA_BR_MULTI_BOOLOPT]) {
1535 		struct br_boolopt_multi *bm;
1536 
1537 		bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
1538 		err = br_boolopt_multi_toggle(br, bm, extack);
1539 		if (err)
1540 			return err;
1541 	}
1542 
1543 	return 0;
1544 }
1545 
br_dev_newlink(struct net * src_net,struct net_device * dev,struct nlattr * tb[],struct nlattr * data[],struct netlink_ext_ack * extack)1546 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1547 			  struct nlattr *tb[], struct nlattr *data[],
1548 			  struct netlink_ext_ack *extack)
1549 {
1550 	struct net_bridge *br = netdev_priv(dev);
1551 	int err;
1552 
1553 	err = register_netdevice(dev);
1554 	if (err)
1555 		return err;
1556 
1557 	if (tb[IFLA_ADDRESS]) {
1558 		spin_lock_bh(&br->lock);
1559 		br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1560 		spin_unlock_bh(&br->lock);
1561 	}
1562 
1563 	err = br_changelink(dev, tb, data, extack);
1564 	if (err)
1565 		br_dev_delete(dev, NULL);
1566 
1567 	return err;
1568 }
1569 
br_get_size(const struct net_device * brdev)1570 static size_t br_get_size(const struct net_device *brdev)
1571 {
1572 	return nla_total_size(sizeof(u32)) +	/* IFLA_BR_FORWARD_DELAY  */
1573 	       nla_total_size(sizeof(u32)) +	/* IFLA_BR_HELLO_TIME */
1574 	       nla_total_size(sizeof(u32)) +	/* IFLA_BR_MAX_AGE */
1575 	       nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1576 	       nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1577 	       nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1578 	       nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1579 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1580 	       nla_total_size(sizeof(__be16)) +	/* IFLA_BR_VLAN_PROTOCOL */
1581 	       nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1582 	       nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1583 	       nla_total_size(sizeof(u8)) +	/* IFLA_BR_VLAN_STATS_PER_PORT */
1584 #endif
1585 	       nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1586 	       nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1587 	       nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1588 	       nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1589 	       nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1590 	       nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1591 	       nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1592 	       nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1593 	       nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1594 	       nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1595 	       nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1596 	       nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1597 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1598 	       nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1599 	       nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1600 	       nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1601 	       nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1602 	       nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1603 	       nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1604 	       nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1605 	       nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1606 	       nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1607 	       nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1608 	       nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1609 	       nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1610 	       nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1611 	       nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1612 	       nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1613 	       nla_total_size(sizeof(u8)) +	/* IFLA_BR_MCAST_IGMP_VERSION */
1614 	       nla_total_size(sizeof(u8)) +	/* IFLA_BR_MCAST_MLD_VERSION */
1615 	       br_multicast_querier_state_size() + /* IFLA_BR_MCAST_QUERIER_STATE */
1616 #endif
1617 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1618 	       nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1619 	       nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1620 	       nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1621 #endif
1622 	       nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
1623 	       0;
1624 }
1625 
br_fill_info(struct sk_buff * skb,const struct net_device * brdev)1626 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1627 {
1628 	struct net_bridge *br = netdev_priv(brdev);
1629 	u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1630 	u32 hello_time = jiffies_to_clock_t(br->hello_time);
1631 	u32 age_time = jiffies_to_clock_t(br->max_age);
1632 	u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1633 	u32 stp_enabled = br->stp_enabled;
1634 	u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1635 	u8 vlan_enabled = br_vlan_enabled(br->dev);
1636 	struct br_boolopt_multi bm;
1637 	u64 clockval;
1638 
1639 	clockval = br_timer_value(&br->hello_timer);
1640 	if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1641 		return -EMSGSIZE;
1642 	clockval = br_timer_value(&br->tcn_timer);
1643 	if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1644 		return -EMSGSIZE;
1645 	clockval = br_timer_value(&br->topology_change_timer);
1646 	if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1647 			      IFLA_BR_PAD))
1648 		return -EMSGSIZE;
1649 	clockval = br_timer_value(&br->gc_work.timer);
1650 	if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1651 		return -EMSGSIZE;
1652 
1653 	br_boolopt_multi_get(br, &bm);
1654 	if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1655 	    nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1656 	    nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1657 	    nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1658 	    nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1659 	    nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1660 	    nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1661 	    nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1662 	    nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1663 		    &br->bridge_id) ||
1664 	    nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1665 		    &br->designated_root) ||
1666 	    nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1667 	    nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1668 	    nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1669 	    nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1670 		       br->topology_change_detected) ||
1671 	    nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
1672 	    nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
1673 		return -EMSGSIZE;
1674 
1675 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1676 	if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1677 	    nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1678 	    nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1679 		       br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1680 	    nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1681 		       br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)))
1682 		return -EMSGSIZE;
1683 #endif
1684 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1685 	if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER,
1686 		       br->multicast_ctx.multicast_router) ||
1687 	    nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1688 		       br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1689 	    nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1690 		       br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1691 	    nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1692 		       br->multicast_ctx.multicast_querier) ||
1693 	    nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1694 		       br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1695 	    nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
1696 	    nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1697 	    nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1698 			br->multicast_ctx.multicast_last_member_count) ||
1699 	    nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1700 			br->multicast_ctx.multicast_startup_query_count) ||
1701 	    nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1702 		       br->multicast_ctx.multicast_igmp_version) ||
1703 	    br_multicast_dump_querier_state(skb, &br->multicast_ctx,
1704 					    IFLA_BR_MCAST_QUERIER_STATE))
1705 		return -EMSGSIZE;
1706 #if IS_ENABLED(CONFIG_IPV6)
1707 	if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1708 		       br->multicast_ctx.multicast_mld_version))
1709 		return -EMSGSIZE;
1710 #endif
1711 	clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_last_member_interval);
1712 	if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1713 			      IFLA_BR_PAD))
1714 		return -EMSGSIZE;
1715 	clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_membership_interval);
1716 	if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1717 			      IFLA_BR_PAD))
1718 		return -EMSGSIZE;
1719 	clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_querier_interval);
1720 	if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1721 			      IFLA_BR_PAD))
1722 		return -EMSGSIZE;
1723 	clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_interval);
1724 	if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1725 			      IFLA_BR_PAD))
1726 		return -EMSGSIZE;
1727 	clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_response_interval);
1728 	if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1729 			      IFLA_BR_PAD))
1730 		return -EMSGSIZE;
1731 	clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_startup_query_interval);
1732 	if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1733 			      IFLA_BR_PAD))
1734 		return -EMSGSIZE;
1735 #endif
1736 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1737 	if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1738 		       br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1739 	    nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1740 		       br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1741 	    nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1742 		       br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1743 		return -EMSGSIZE;
1744 #endif
1745 
1746 	return 0;
1747 }
1748 
br_get_linkxstats_size(const struct net_device * dev,int attr)1749 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1750 {
1751 	struct net_bridge_port *p = NULL;
1752 	struct net_bridge_vlan_group *vg;
1753 	struct net_bridge_vlan *v;
1754 	struct net_bridge *br;
1755 	int numvls = 0;
1756 
1757 	switch (attr) {
1758 	case IFLA_STATS_LINK_XSTATS:
1759 		br = netdev_priv(dev);
1760 		vg = br_vlan_group(br);
1761 		break;
1762 	case IFLA_STATS_LINK_XSTATS_SLAVE:
1763 		p = br_port_get_rtnl(dev);
1764 		if (!p)
1765 			return 0;
1766 		vg = nbp_vlan_group(p);
1767 		break;
1768 	default:
1769 		return 0;
1770 	}
1771 
1772 	if (vg) {
1773 		/* we need to count all, even placeholder entries */
1774 		list_for_each_entry(v, &vg->vlan_list, vlist)
1775 			numvls++;
1776 	}
1777 
1778 	return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1779 	       nla_total_size_64bit(sizeof(struct br_mcast_stats)) +
1780 	       (p ? nla_total_size_64bit(sizeof(p->stp_xstats)) : 0) +
1781 	       nla_total_size(0);
1782 }
1783 
br_fill_linkxstats(struct sk_buff * skb,const struct net_device * dev,int * prividx,int attr)1784 static int br_fill_linkxstats(struct sk_buff *skb,
1785 			      const struct net_device *dev,
1786 			      int *prividx, int attr)
1787 {
1788 	struct nlattr *nla __maybe_unused;
1789 	struct net_bridge_port *p = NULL;
1790 	struct net_bridge_vlan_group *vg;
1791 	struct net_bridge_vlan *v;
1792 	struct net_bridge *br;
1793 	struct nlattr *nest;
1794 	int vl_idx = 0;
1795 
1796 	switch (attr) {
1797 	case IFLA_STATS_LINK_XSTATS:
1798 		br = netdev_priv(dev);
1799 		vg = br_vlan_group(br);
1800 		break;
1801 	case IFLA_STATS_LINK_XSTATS_SLAVE:
1802 		p = br_port_get_rtnl(dev);
1803 		if (!p)
1804 			return 0;
1805 		br = p->br;
1806 		vg = nbp_vlan_group(p);
1807 		break;
1808 	default:
1809 		return -EINVAL;
1810 	}
1811 
1812 	nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE);
1813 	if (!nest)
1814 		return -EMSGSIZE;
1815 
1816 	if (vg) {
1817 		u16 pvid;
1818 
1819 		pvid = br_get_pvid(vg);
1820 		list_for_each_entry(v, &vg->vlan_list, vlist) {
1821 			struct bridge_vlan_xstats vxi;
1822 			struct pcpu_sw_netstats stats;
1823 
1824 			if (++vl_idx < *prividx)
1825 				continue;
1826 			memset(&vxi, 0, sizeof(vxi));
1827 			vxi.vid = v->vid;
1828 			vxi.flags = v->flags;
1829 			if (v->vid == pvid)
1830 				vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1831 			br_vlan_get_stats(v, &stats);
1832 			vxi.rx_bytes = u64_stats_read(&stats.rx_bytes);
1833 			vxi.rx_packets = u64_stats_read(&stats.rx_packets);
1834 			vxi.tx_bytes = u64_stats_read(&stats.tx_bytes);
1835 			vxi.tx_packets = u64_stats_read(&stats.tx_packets);
1836 
1837 			if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1838 				goto nla_put_failure;
1839 		}
1840 	}
1841 
1842 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1843 	if (++vl_idx >= *prividx) {
1844 		nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1845 					sizeof(struct br_mcast_stats),
1846 					BRIDGE_XSTATS_PAD);
1847 		if (!nla)
1848 			goto nla_put_failure;
1849 		br_multicast_get_stats(br, p, nla_data(nla));
1850 	}
1851 #endif
1852 
1853 	if (p) {
1854 		nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP,
1855 					sizeof(p->stp_xstats),
1856 					BRIDGE_XSTATS_PAD);
1857 		if (!nla)
1858 			goto nla_put_failure;
1859 
1860 		spin_lock_bh(&br->lock);
1861 		memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats));
1862 		spin_unlock_bh(&br->lock);
1863 	}
1864 
1865 	nla_nest_end(skb, nest);
1866 	*prividx = 0;
1867 
1868 	return 0;
1869 
1870 nla_put_failure:
1871 	nla_nest_end(skb, nest);
1872 	*prividx = vl_idx;
1873 
1874 	return -EMSGSIZE;
1875 }
1876 
1877 static struct rtnl_af_ops br_af_ops __read_mostly = {
1878 	.family			= AF_BRIDGE,
1879 	.get_link_af_size	= br_get_link_af_size_filtered,
1880 };
1881 
1882 struct rtnl_link_ops br_link_ops __read_mostly = {
1883 	.kind			= "bridge",
1884 	.priv_size		= sizeof(struct net_bridge),
1885 	.setup			= br_dev_setup,
1886 	.maxtype		= IFLA_BR_MAX,
1887 	.policy			= br_policy,
1888 	.validate		= br_validate,
1889 	.newlink		= br_dev_newlink,
1890 	.changelink		= br_changelink,
1891 	.dellink		= br_dev_delete,
1892 	.get_size		= br_get_size,
1893 	.fill_info		= br_fill_info,
1894 	.fill_linkxstats	= br_fill_linkxstats,
1895 	.get_linkxstats_size	= br_get_linkxstats_size,
1896 
1897 	.slave_maxtype		= IFLA_BRPORT_MAX,
1898 	.slave_policy		= br_port_policy,
1899 	.slave_changelink	= br_port_slave_changelink,
1900 	.get_slave_size		= br_port_get_slave_size,
1901 	.fill_slave_info	= br_port_fill_slave_info,
1902 };
1903 
br_netlink_init(void)1904 int __init br_netlink_init(void)
1905 {
1906 	int err;
1907 
1908 	err = br_vlan_rtnl_init();
1909 	if (err)
1910 		goto out;
1911 
1912 	rtnl_af_register(&br_af_ops);
1913 
1914 	err = rtnl_link_register(&br_link_ops);
1915 	if (err)
1916 		goto out_af;
1917 
1918 	return 0;
1919 
1920 out_af:
1921 	rtnl_af_unregister(&br_af_ops);
1922 out:
1923 	return err;
1924 }
1925 
br_netlink_fini(void)1926 void br_netlink_fini(void)
1927 {
1928 	br_vlan_rtnl_uninit();
1929 	rtnl_af_unregister(&br_af_ops);
1930 	rtnl_link_unregister(&br_link_ops);
1931 }
1932