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