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