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