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Linux/net/bridge/br_netlink.c

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  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_tunnel.h"
 20 
 21 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
 22                                 u32 filter_mask)
 23 {
 24         struct net_bridge_vlan *v;
 25         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 26         u16 flags, pvid;
 27         int num_vlans = 0;
 28 
 29         if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
 30                 return 0;
 31 
 32         pvid = br_get_pvid(vg);
 33         /* Count number of vlan infos */
 34         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 35                 flags = 0;
 36                 /* only a context, bridge vlan not activated */
 37                 if (!br_vlan_should_use(v))
 38                         continue;
 39                 if (v->vid == pvid)
 40                         flags |= BRIDGE_VLAN_INFO_PVID;
 41 
 42                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 43                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 44 
 45                 if (vid_range_start == 0) {
 46                         goto initvars;
 47                 } else if ((v->vid - vid_range_end) == 1 &&
 48                         flags == vid_range_flags) {
 49                         vid_range_end = v->vid;
 50                         continue;
 51                 } else {
 52                         if ((vid_range_end - vid_range_start) > 0)
 53                                 num_vlans += 2;
 54                         else
 55                                 num_vlans += 1;
 56                 }
 57 initvars:
 58                 vid_range_start = v->vid;
 59                 vid_range_end = v->vid;
 60                 vid_range_flags = flags;
 61         }
 62 
 63         if (vid_range_start != 0) {
 64                 if ((vid_range_end - vid_range_start) > 0)
 65                         num_vlans += 2;
 66                 else
 67                         num_vlans += 1;
 68         }
 69 
 70         return num_vlans;
 71 }
 72 
 73 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
 74                                  u32 filter_mask)
 75 {
 76         int num_vlans;
 77 
 78         if (!vg)
 79                 return 0;
 80 
 81         if (filter_mask & RTEXT_FILTER_BRVLAN)
 82                 return vg->num_vlans;
 83 
 84         rcu_read_lock();
 85         num_vlans = __get_num_vlan_infos(vg, filter_mask);
 86         rcu_read_unlock();
 87 
 88         return num_vlans;
 89 }
 90 
 91 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
 92                                            u32 filter_mask)
 93 {
 94         struct net_bridge_vlan_group *vg = NULL;
 95         struct net_bridge_port *p = NULL;
 96         struct net_bridge *br;
 97         int num_vlan_infos;
 98         size_t vinfo_sz = 0;
 99 
100         rcu_read_lock();
101         if (netif_is_bridge_port(dev)) {
102                 p = br_port_get_rcu(dev);
103                 vg = nbp_vlan_group_rcu(p);
104         } else if (dev->priv_flags & IFF_EBRIDGE) {
105                 br = netdev_priv(dev);
106                 vg = br_vlan_group_rcu(br);
107         }
108         num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
109         rcu_read_unlock();
110 
111         if (p && (p->flags & BR_VLAN_TUNNEL))
112                 vinfo_sz += br_get_vlan_tunnel_info_size(vg);
113 
114         /* Each VLAN is returned in bridge_vlan_info along with flags */
115         vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
116 
117         return vinfo_sz;
118 }
119 
120 static inline size_t br_port_info_size(void)
121 {
122         return nla_total_size(1)        /* IFLA_BRPORT_STATE  */
123                 + nla_total_size(2)     /* IFLA_BRPORT_PRIORITY */
124                 + nla_total_size(4)     /* IFLA_BRPORT_COST */
125                 + nla_total_size(1)     /* IFLA_BRPORT_MODE */
126                 + nla_total_size(1)     /* IFLA_BRPORT_GUARD */
127                 + nla_total_size(1)     /* IFLA_BRPORT_PROTECT */
128                 + nla_total_size(1)     /* IFLA_BRPORT_FAST_LEAVE */
129                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_TO_UCAST */
130                 + nla_total_size(1)     /* IFLA_BRPORT_LEARNING */
131                 + nla_total_size(1)     /* IFLA_BRPORT_UNICAST_FLOOD */
132                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_FLOOD */
133                 + nla_total_size(1)     /* IFLA_BRPORT_BCAST_FLOOD */
134                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP */
135                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP_WIFI */
136                 + nla_total_size(1)     /* IFLA_BRPORT_VLAN_TUNNEL */
137                 + nla_total_size(1)     /* IFLA_BRPORT_NEIGH_SUPPRESS */
138                 + nla_total_size(1)     /* IFLA_BRPORT_ISOLATED */
139                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
140                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
141                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_PORT */
142                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_COST */
143                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_ID */
144                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_NO */
145                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
146                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_CONFIG_PENDING */
147                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
148                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
149                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
150 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
151                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MULTICAST_ROUTER */
152 #endif
153                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_GROUP_FWD_MASK */
154                 + 0;
155 }
156 
157 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
158 {
159         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
160                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
161                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
162                 + nla_total_size(4) /* IFLA_MASTER */
163                 + nla_total_size(4) /* IFLA_MTU */
164                 + nla_total_size(4) /* IFLA_LINK */
165                 + nla_total_size(1) /* IFLA_OPERSTATE */
166                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
167                 + nla_total_size(br_get_link_af_size_filtered(dev,
168                                  filter_mask)) /* IFLA_AF_SPEC */
169                 + nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */
170 }
171 
172 static int br_port_fill_attrs(struct sk_buff *skb,
173                               const struct net_bridge_port *p)
174 {
175         u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
176         struct net_bridge_port *backup_p;
177         u64 timerval;
178 
179         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
180             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
181             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
182             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
183             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
184             nla_put_u8(skb, IFLA_BRPORT_PROTECT,
185                        !!(p->flags & BR_ROOT_BLOCK)) ||
186             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
187                        !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
188             nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
189                        !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
190             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
191             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
192                        !!(p->flags & BR_FLOOD)) ||
193             nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
194                        !!(p->flags & BR_MCAST_FLOOD)) ||
195             nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
196                        !!(p->flags & BR_BCAST_FLOOD)) ||
197             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
198             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
199                        !!(p->flags & BR_PROXYARP_WIFI)) ||
200             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
201                     &p->designated_root) ||
202             nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
203                     &p->designated_bridge) ||
204             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
205             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
206             nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
207             nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
208             nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
209                        p->topology_change_ack) ||
210             nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
211             nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
212                                                         BR_VLAN_TUNNEL)) ||
213             nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
214             nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
215                        !!(p->flags & BR_NEIGH_SUPPRESS)) ||
216             nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)))
217                 return -EMSGSIZE;
218 
219         timerval = br_timer_value(&p->message_age_timer);
220         if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
221                               IFLA_BRPORT_PAD))
222                 return -EMSGSIZE;
223         timerval = br_timer_value(&p->forward_delay_timer);
224         if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
225                               IFLA_BRPORT_PAD))
226                 return -EMSGSIZE;
227         timerval = br_timer_value(&p->hold_timer);
228         if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
229                               IFLA_BRPORT_PAD))
230                 return -EMSGSIZE;
231 
232 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
233         if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
234                        p->multicast_router))
235                 return -EMSGSIZE;
236 #endif
237 
238         /* we might be called only with br->lock */
239         rcu_read_lock();
240         backup_p = rcu_dereference(p->backup_port);
241         if (backup_p)
242                 nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT,
243                             backup_p->dev->ifindex);
244         rcu_read_unlock();
245 
246         return 0;
247 }
248 
249 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
250                                     u16 vid_end, u16 flags)
251 {
252         struct  bridge_vlan_info vinfo;
253 
254         if ((vid_end - vid_start) > 0) {
255                 /* add range to skb */
256                 vinfo.vid = vid_start;
257                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
258                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
259                             sizeof(vinfo), &vinfo))
260                         goto nla_put_failure;
261 
262                 vinfo.vid = vid_end;
263                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
264                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
265                             sizeof(vinfo), &vinfo))
266                         goto nla_put_failure;
267         } else {
268                 vinfo.vid = vid_start;
269                 vinfo.flags = flags;
270                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
271                             sizeof(vinfo), &vinfo))
272                         goto nla_put_failure;
273         }
274 
275         return 0;
276 
277 nla_put_failure:
278         return -EMSGSIZE;
279 }
280 
281 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
282                                          struct net_bridge_vlan_group *vg)
283 {
284         struct net_bridge_vlan *v;
285         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
286         u16 flags, pvid;
287         int err = 0;
288 
289         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
290          * and mark vlan info with begin and end flags
291          * if vlaninfo represents a range
292          */
293         pvid = br_get_pvid(vg);
294         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
295                 flags = 0;
296                 if (!br_vlan_should_use(v))
297                         continue;
298                 if (v->vid == pvid)
299                         flags |= BRIDGE_VLAN_INFO_PVID;
300 
301                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
302                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
303 
304                 if (vid_range_start == 0) {
305                         goto initvars;
306                 } else if ((v->vid - vid_range_end) == 1 &&
307                         flags == vid_range_flags) {
308                         vid_range_end = v->vid;
309                         continue;
310                 } else {
311                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
312                                                        vid_range_end,
313                                                        vid_range_flags);
314                         if (err)
315                                 return err;
316                 }
317 
318 initvars:
319                 vid_range_start = v->vid;
320                 vid_range_end = v->vid;
321                 vid_range_flags = flags;
322         }
323 
324         if (vid_range_start != 0) {
325                 /* Call it once more to send any left over vlans */
326                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
327                                                vid_range_end,
328                                                vid_range_flags);
329                 if (err)
330                         return err;
331         }
332 
333         return 0;
334 }
335 
336 static int br_fill_ifvlaninfo(struct sk_buff *skb,
337                               struct net_bridge_vlan_group *vg)
338 {
339         struct bridge_vlan_info vinfo;
340         struct net_bridge_vlan *v;
341         u16 pvid;
342 
343         pvid = br_get_pvid(vg);
344         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
345                 if (!br_vlan_should_use(v))
346                         continue;
347 
348                 vinfo.vid = v->vid;
349                 vinfo.flags = 0;
350                 if (v->vid == pvid)
351                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
352 
353                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
354                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
355 
356                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
357                             sizeof(vinfo), &vinfo))
358                         goto nla_put_failure;
359         }
360 
361         return 0;
362 
363 nla_put_failure:
364         return -EMSGSIZE;
365 }
366 
367 /*
368  * Create one netlink message for one interface
369  * Contains port and master info as well as carrier and bridge state.
370  */
371 static int br_fill_ifinfo(struct sk_buff *skb,
372                           const struct net_bridge_port *port,
373                           u32 pid, u32 seq, int event, unsigned int flags,
374                           u32 filter_mask, const struct net_device *dev)
375 {
376         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
377         struct net_bridge *br;
378         struct ifinfomsg *hdr;
379         struct nlmsghdr *nlh;
380 
381         if (port)
382                 br = port->br;
383         else
384                 br = netdev_priv(dev);
385 
386         br_debug(br, "br_fill_info event %d port %s master %s\n",
387                      event, dev->name, br->dev->name);
388 
389         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
390         if (nlh == NULL)
391                 return -EMSGSIZE;
392 
393         hdr = nlmsg_data(nlh);
394         hdr->ifi_family = AF_BRIDGE;
395         hdr->__ifi_pad = 0;
396         hdr->ifi_type = dev->type;
397         hdr->ifi_index = dev->ifindex;
398         hdr->ifi_flags = dev_get_flags(dev);
399         hdr->ifi_change = 0;
400 
401         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
402             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
403             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
404             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
405             (dev->addr_len &&
406              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
407             (dev->ifindex != dev_get_iflink(dev) &&
408              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
409                 goto nla_put_failure;
410 
411         if (event == RTM_NEWLINK && port) {
412                 struct nlattr *nest;
413 
414                 nest = nla_nest_start(skb, IFLA_PROTINFO);
415                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
416                         goto nla_put_failure;
417                 nla_nest_end(skb, nest);
418         }
419 
420         /* Check if  the VID information is requested */
421         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
422             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
423                 struct net_bridge_vlan_group *vg;
424                 struct nlattr *af;
425                 int err;
426 
427                 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
428                 rcu_read_lock();
429                 if (port)
430                         vg = nbp_vlan_group_rcu(port);
431                 else
432                         vg = br_vlan_group_rcu(br);
433 
434                 if (!vg || !vg->num_vlans) {
435                         rcu_read_unlock();
436                         goto done;
437                 }
438                 af = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
439                 if (!af) {
440                         rcu_read_unlock();
441                         goto nla_put_failure;
442                 }
443                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
444                         err = br_fill_ifvlaninfo_compressed(skb, vg);
445                 else
446                         err = br_fill_ifvlaninfo(skb, vg);
447 
448                 if (port && (port->flags & BR_VLAN_TUNNEL))
449                         err = br_fill_vlan_tunnel_info(skb, vg);
450                 rcu_read_unlock();
451                 if (err)
452                         goto nla_put_failure;
453                 nla_nest_end(skb, af);
454         }
455 
456 done:
457         nlmsg_end(skb, nlh);
458         return 0;
459 
460 nla_put_failure:
461         nlmsg_cancel(skb, nlh);
462         return -EMSGSIZE;
463 }
464 
465 /* Notify listeners of a change in bridge or port information */
466 void br_ifinfo_notify(int event, const struct net_bridge *br,
467                       const struct net_bridge_port *port)
468 {
469         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
470         struct net_device *dev;
471         struct sk_buff *skb;
472         int err = -ENOBUFS;
473         struct net *net;
474         u16 port_no = 0;
475 
476         if (WARN_ON(!port && !br))
477                 return;
478 
479         if (port) {
480                 dev = port->dev;
481                 br = port->br;
482                 port_no = port->port_no;
483         } else {
484                 dev = br->dev;
485         }
486 
487         net = dev_net(dev);
488         br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
489 
490         skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
491         if (skb == NULL)
492                 goto errout;
493 
494         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev);
495         if (err < 0) {
496                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
497                 WARN_ON(err == -EMSGSIZE);
498                 kfree_skb(skb);
499                 goto errout;
500         }
501         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
502         return;
503 errout:
504         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
505 }
506 
507 /*
508  * Dump information about all ports, in response to GETLINK
509  */
510 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
511                struct net_device *dev, u32 filter_mask, int nlflags)
512 {
513         struct net_bridge_port *port = br_port_get_rtnl(dev);
514 
515         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
516             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
517                 return 0;
518 
519         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
520                               filter_mask, dev);
521 }
522 
523 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
524                         int cmd, struct bridge_vlan_info *vinfo, bool *changed,
525                         struct netlink_ext_ack *extack)
526 {
527         bool curr_change;
528         int err = 0;
529 
530         switch (cmd) {
531         case RTM_SETLINK:
532                 if (p) {
533                         /* if the MASTER flag is set this will act on the global
534                          * per-VLAN entry as well
535                          */
536                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
537                                            &curr_change, extack);
538                 } else {
539                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
540                         err = br_vlan_add(br, vinfo->vid, vinfo->flags,
541                                           &curr_change, extack);
542                 }
543                 if (curr_change)
544                         *changed = true;
545                 break;
546 
547         case RTM_DELLINK:
548                 if (p) {
549                         if (!nbp_vlan_delete(p, vinfo->vid))
550                                 *changed = true;
551 
552                         if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
553                             !br_vlan_delete(p->br, vinfo->vid))
554                                 *changed = true;
555                 } else if (!br_vlan_delete(br, vinfo->vid)) {
556                         *changed = true;
557                 }
558                 break;
559         }
560 
561         return err;
562 }
563 
564 static int br_process_vlan_info(struct net_bridge *br,
565                                 struct net_bridge_port *p, int cmd,
566                                 struct bridge_vlan_info *vinfo_curr,
567                                 struct bridge_vlan_info **vinfo_last,
568                                 bool *changed,
569                                 struct netlink_ext_ack *extack)
570 {
571         if (!vinfo_curr->vid || vinfo_curr->vid >= VLAN_VID_MASK)
572                 return -EINVAL;
573 
574         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
575                 /* check if we are already processing a range */
576                 if (*vinfo_last)
577                         return -EINVAL;
578                 *vinfo_last = vinfo_curr;
579                 /* don't allow range of pvids */
580                 if ((*vinfo_last)->flags & BRIDGE_VLAN_INFO_PVID)
581                         return -EINVAL;
582                 return 0;
583         }
584 
585         if (*vinfo_last) {
586                 struct bridge_vlan_info tmp_vinfo;
587                 int v, err;
588 
589                 if (!(vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END))
590                         return -EINVAL;
591 
592                 if (vinfo_curr->vid <= (*vinfo_last)->vid)
593                         return -EINVAL;
594 
595                 memcpy(&tmp_vinfo, *vinfo_last,
596                        sizeof(struct bridge_vlan_info));
597                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
598                         tmp_vinfo.vid = v;
599                         err = br_vlan_info(br, p, cmd, &tmp_vinfo, changed,
600                                            extack);
601                         if (err)
602                                 break;
603                 }
604                 *vinfo_last = NULL;
605 
606                 return err;
607         }
608 
609         return br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
610 }
611 
612 static int br_afspec(struct net_bridge *br,
613                      struct net_bridge_port *p,
614                      struct nlattr *af_spec,
615                      int cmd, bool *changed,
616                      struct netlink_ext_ack *extack)
617 {
618         struct bridge_vlan_info *vinfo_curr = NULL;
619         struct bridge_vlan_info *vinfo_last = NULL;
620         struct nlattr *attr;
621         struct vtunnel_info tinfo_last = {};
622         struct vtunnel_info tinfo_curr = {};
623         int err = 0, rem;
624 
625         nla_for_each_nested(attr, af_spec, rem) {
626                 err = 0;
627                 switch (nla_type(attr)) {
628                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
629                         if (!p || !(p->flags & BR_VLAN_TUNNEL))
630                                 return -EINVAL;
631                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
632                         if (err)
633                                 return err;
634                         err = br_process_vlan_tunnel_info(br, p, cmd,
635                                                           &tinfo_curr,
636                                                           &tinfo_last,
637                                                           changed);
638                         if (err)
639                                 return err;
640                         break;
641                 case IFLA_BRIDGE_VLAN_INFO:
642                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
643                                 return -EINVAL;
644                         vinfo_curr = nla_data(attr);
645                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
646                                                    &vinfo_last, changed,
647                                                    extack);
648                         if (err)
649                                 return err;
650                         break;
651                 }
652         }
653 
654         return err;
655 }
656 
657 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
658         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
659         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
660         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
661         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
662         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
663         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
664         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
665         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
666         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
667         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
668         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
669         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
670         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
671         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
672         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
673         [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
674         [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
675         [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
676         [IFLA_BRPORT_ISOLATED]  = { .type = NLA_U8 },
677         [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
678 };
679 
680 /* Change the state of the port and notify spanning tree */
681 static int br_set_port_state(struct net_bridge_port *p, u8 state)
682 {
683         if (state > BR_STATE_BLOCKING)
684                 return -EINVAL;
685 
686         /* if kernel STP is running, don't allow changes */
687         if (p->br->stp_enabled == BR_KERNEL_STP)
688                 return -EBUSY;
689 
690         /* if device is not up, change is not allowed
691          * if link is not present, only allowable state is disabled
692          */
693         if (!netif_running(p->dev) ||
694             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
695                 return -ENETDOWN;
696 
697         br_set_state(p, state);
698         br_port_state_selection(p->br);
699         return 0;
700 }
701 
702 /* Set/clear or port flags based on attribute */
703 static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
704                             int attrtype, unsigned long mask)
705 {
706         unsigned long flags;
707         int err;
708 
709         if (!tb[attrtype])
710                 return 0;
711 
712         if (nla_get_u8(tb[attrtype]))
713                 flags = p->flags | mask;
714         else
715                 flags = p->flags & ~mask;
716 
717         err = br_switchdev_set_port_flag(p, flags, mask);
718         if (err)
719                 return err;
720 
721         p->flags = flags;
722         return 0;
723 }
724 
725 /* Process bridge protocol info on port */
726 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
727 {
728         unsigned long old_flags = p->flags;
729         bool br_vlan_tunnel_old = false;
730         int err;
731 
732         err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
733         if (err)
734                 return err;
735 
736         err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
737         if (err)
738                 return err;
739 
740         err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
741         if (err)
742                 return err;
743 
744         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
745         if (err)
746                 return err;
747 
748         err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
749         if (err)
750                 return err;
751 
752         err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
753         if (err)
754                 return err;
755 
756         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
757         if (err)
758                 return err;
759 
760         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
761         if (err)
762                 return err;
763 
764         err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
765         if (err)
766                 return err;
767 
768         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
769         if (err)
770                 return err;
771 
772         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
773         if (err)
774                 return err;
775 
776         br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
777         err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
778         if (err)
779                 return err;
780 
781         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
782                 nbp_vlan_tunnel_info_flush(p);
783 
784         if (tb[IFLA_BRPORT_COST]) {
785                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
786                 if (err)
787                         return err;
788         }
789 
790         if (tb[IFLA_BRPORT_PRIORITY]) {
791                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
792                 if (err)
793                         return err;
794         }
795 
796         if (tb[IFLA_BRPORT_STATE]) {
797                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
798                 if (err)
799                         return err;
800         }
801 
802         if (tb[IFLA_BRPORT_FLUSH])
803                 br_fdb_delete_by_port(p->br, p, 0, 0);
804 
805 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
806         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
807                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
808 
809                 err = br_multicast_set_port_router(p, mcast_router);
810                 if (err)
811                         return err;
812         }
813 #endif
814 
815         if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
816                 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
817 
818                 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
819                         return -EINVAL;
820                 p->group_fwd_mask = fwd_mask;
821         }
822 
823         err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
824                                BR_NEIGH_SUPPRESS);
825         if (err)
826                 return err;
827 
828         err = br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
829         if (err)
830                 return err;
831 
832         if (tb[IFLA_BRPORT_BACKUP_PORT]) {
833                 struct net_device *backup_dev = NULL;
834                 u32 backup_ifindex;
835 
836                 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
837                 if (backup_ifindex) {
838                         backup_dev = __dev_get_by_index(dev_net(p->dev),
839                                                         backup_ifindex);
840                         if (!backup_dev)
841                                 return -ENOENT;
842                 }
843 
844                 err = nbp_backup_change(p, backup_dev);
845                 if (err)
846                         return err;
847         }
848 
849         br_port_flags_change(p, old_flags ^ p->flags);
850         return 0;
851 }
852 
853 /* Change state and parameters on port. */
854 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags,
855                struct netlink_ext_ack *extack)
856 {
857         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
858         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
859         struct net_bridge_port *p;
860         struct nlattr *protinfo;
861         struct nlattr *afspec;
862         bool changed = false;
863         int err = 0;
864 
865         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
866         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
867         if (!protinfo && !afspec)
868                 return 0;
869 
870         p = br_port_get_rtnl(dev);
871         /* We want to accept dev as bridge itself if the AF_SPEC
872          * is set to see if someone is setting vlan info on the bridge
873          */
874         if (!p && !afspec)
875                 return -EINVAL;
876 
877         if (p && protinfo) {
878                 if (protinfo->nla_type & NLA_F_NESTED) {
879                         err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX,
880                                                           protinfo,
881                                                           br_port_policy,
882                                                           NULL);
883                         if (err)
884                                 return err;
885 
886                         spin_lock_bh(&p->br->lock);
887                         err = br_setport(p, tb);
888                         spin_unlock_bh(&p->br->lock);
889                 } else {
890                         /* Binary compatibility with old RSTP */
891                         if (nla_len(protinfo) < sizeof(u8))
892                                 return -EINVAL;
893 
894                         spin_lock_bh(&p->br->lock);
895                         err = br_set_port_state(p, nla_get_u8(protinfo));
896                         spin_unlock_bh(&p->br->lock);
897                 }
898                 if (err)
899                         goto out;
900                 changed = true;
901         }
902 
903         if (afspec)
904                 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
905 
906         if (changed)
907                 br_ifinfo_notify(RTM_NEWLINK, br, p);
908 out:
909         return err;
910 }
911 
912 /* Delete port information */
913 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
914 {
915         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
916         struct net_bridge_port *p;
917         struct nlattr *afspec;
918         bool changed = false;
919         int err = 0;
920 
921         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
922         if (!afspec)
923                 return 0;
924 
925         p = br_port_get_rtnl(dev);
926         /* We want to accept dev as bridge itself as well */
927         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
928                 return -EINVAL;
929 
930         err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL);
931         if (changed)
932                 /* Send RTM_NEWLINK because userspace
933                  * expects RTM_NEWLINK for vlan dels
934                  */
935                 br_ifinfo_notify(RTM_NEWLINK, br, p);
936 
937         return err;
938 }
939 
940 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
941                        struct netlink_ext_ack *extack)
942 {
943         if (tb[IFLA_ADDRESS]) {
944                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
945                         return -EINVAL;
946                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
947                         return -EADDRNOTAVAIL;
948         }
949 
950         if (!data)
951                 return 0;
952 
953 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
954         if (data[IFLA_BR_VLAN_PROTOCOL]) {
955                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
956                 case htons(ETH_P_8021Q):
957                 case htons(ETH_P_8021AD):
958                         break;
959                 default:
960                         return -EPROTONOSUPPORT;
961                 }
962         }
963 
964         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
965                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
966 
967                 if (defpvid >= VLAN_VID_MASK)
968                         return -EINVAL;
969         }
970 #endif
971 
972         return 0;
973 }
974 
975 static int br_port_slave_changelink(struct net_device *brdev,
976                                     struct net_device *dev,
977                                     struct nlattr *tb[],
978                                     struct nlattr *data[],
979                                     struct netlink_ext_ack *extack)
980 {
981         struct net_bridge *br = netdev_priv(brdev);
982         int ret;
983 
984         if (!data)
985                 return 0;
986 
987         spin_lock_bh(&br->lock);
988         ret = br_setport(br_port_get_rtnl(dev), data);
989         spin_unlock_bh(&br->lock);
990 
991         return ret;
992 }
993 
994 static int br_port_fill_slave_info(struct sk_buff *skb,
995                                    const struct net_device *brdev,
996                                    const struct net_device *dev)
997 {
998         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
999 }
1000 
1001 static size_t br_port_get_slave_size(const struct net_device *brdev,
1002                                      const struct net_device *dev)
1003 {
1004         return br_port_info_size();
1005 }
1006 
1007 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1008         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1009         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
1010         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
1011         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1012         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1013         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1014         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1015         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1016         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1017         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1018                                  .len  = ETH_ALEN },
1019         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1020         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1021         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1022         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1023         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1024         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1025         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1026         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1027         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1028         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1029         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1030         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1031         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1032         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1033         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1034         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1035         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1036         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1037         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1038         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1039         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1040         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1041         [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1042         [IFLA_BR_MULTI_BOOLOPT] = { .type = NLA_EXACT_LEN,
1043                                     .len = sizeof(struct br_boolopt_multi) },
1044 };
1045 
1046 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1047                          struct nlattr *data[],
1048                          struct netlink_ext_ack *extack)
1049 {
1050         struct net_bridge *br = netdev_priv(brdev);
1051         int err;
1052 
1053         if (!data)
1054                 return 0;
1055 
1056         if (data[IFLA_BR_FORWARD_DELAY]) {
1057                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1058                 if (err)
1059                         return err;
1060         }
1061 
1062         if (data[IFLA_BR_HELLO_TIME]) {
1063                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1064                 if (err)
1065                         return err;
1066         }
1067 
1068         if (data[IFLA_BR_MAX_AGE]) {
1069                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1070                 if (err)
1071                         return err;
1072         }
1073 
1074         if (data[IFLA_BR_AGEING_TIME]) {
1075                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1076                 if (err)
1077                         return err;
1078         }
1079 
1080         if (data[IFLA_BR_STP_STATE]) {
1081                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1082 
1083                 br_stp_set_enabled(br, stp_enabled);
1084         }
1085 
1086         if (data[IFLA_BR_PRIORITY]) {
1087                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1088 
1089                 br_stp_set_bridge_priority(br, priority);
1090         }
1091 
1092         if (data[IFLA_BR_VLAN_FILTERING]) {
1093                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1094 
1095                 err = __br_vlan_filter_toggle(br, vlan_filter);
1096                 if (err)
1097                         return err;
1098         }
1099 
1100 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1101         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1102                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1103 
1104                 err = __br_vlan_set_proto(br, vlan_proto);
1105                 if (err)
1106                         return err;
1107         }
1108 
1109         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1110                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1111 
1112                 err = __br_vlan_set_default_pvid(br, defpvid, extack);
1113                 if (err)
1114                         return err;
1115         }
1116 
1117         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1118                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1119 
1120                 err = br_vlan_set_stats(br, vlan_stats);
1121                 if (err)
1122                         return err;
1123         }
1124 
1125         if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1126                 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1127 
1128                 err = br_vlan_set_stats_per_port(br, per_port);
1129                 if (err)
1130                         return err;
1131         }
1132 #endif
1133 
1134         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1135                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1136 
1137                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1138                         return -EINVAL;
1139                 br->group_fwd_mask = fwd_mask;
1140         }
1141 
1142         if (data[IFLA_BR_GROUP_ADDR]) {
1143                 u8 new_addr[ETH_ALEN];
1144 
1145                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1146                         return -EINVAL;
1147                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1148                 if (!is_link_local_ether_addr(new_addr))
1149                         return -EINVAL;
1150                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1151                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1152                     new_addr[5] == 3)           /* 802.1X PAE address */
1153                         return -EINVAL;
1154                 spin_lock_bh(&br->lock);
1155                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1156                 spin_unlock_bh(&br->lock);
1157                 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1158                 br_recalculate_fwd_mask(br);
1159         }
1160 
1161         if (data[IFLA_BR_FDB_FLUSH])
1162                 br_fdb_flush(br);
1163 
1164 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1165         if (data[IFLA_BR_MCAST_ROUTER]) {
1166                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1167 
1168                 err = br_multicast_set_router(br, multicast_router);
1169                 if (err)
1170                         return err;
1171         }
1172 
1173         if (data[IFLA_BR_MCAST_SNOOPING]) {
1174                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1175 
1176                 br_multicast_toggle(br, mcast_snooping);
1177         }
1178 
1179         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1180                 u8 val;
1181 
1182                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1183                 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1184         }
1185 
1186         if (data[IFLA_BR_MCAST_QUERIER]) {
1187                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1188 
1189                 err = br_multicast_set_querier(br, mcast_querier);
1190                 if (err)
1191                         return err;
1192         }
1193 
1194         if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
1195                 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
1196                         RHT_ELASTICITY);
1197 
1198         if (data[IFLA_BR_MCAST_HASH_MAX])
1199                 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1200 
1201         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1202                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1203 
1204                 br->multicast_last_member_count = val;
1205         }
1206 
1207         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1208                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1209 
1210                 br->multicast_startup_query_count = val;
1211         }
1212 
1213         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1214                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1215 
1216                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1217         }
1218 
1219         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1220                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1221 
1222                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1223         }
1224 
1225         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1226                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1227 
1228                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1229         }
1230 
1231         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1232                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1233 
1234                 br->multicast_query_interval = clock_t_to_jiffies(val);
1235         }
1236 
1237         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1238                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1239 
1240                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1241         }
1242 
1243         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1244                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1245 
1246                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1247         }
1248 
1249         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1250                 __u8 mcast_stats;
1251 
1252                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1253                 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1254         }
1255 
1256         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1257                 __u8 igmp_version;
1258 
1259                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1260                 err = br_multicast_set_igmp_version(br, igmp_version);
1261                 if (err)
1262                         return err;
1263         }
1264 
1265 #if IS_ENABLED(CONFIG_IPV6)
1266         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1267                 __u8 mld_version;
1268 
1269                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1270                 err = br_multicast_set_mld_version(br, mld_version);
1271                 if (err)
1272                         return err;
1273         }
1274 #endif
1275 #endif
1276 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1277         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1278                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1279 
1280                 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1281         }
1282 
1283         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1284                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1285 
1286                 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1287         }
1288 
1289         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1290                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1291 
1292                 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1293         }
1294 #endif
1295 
1296         if (data[IFLA_BR_MULTI_BOOLOPT]) {
1297                 struct br_boolopt_multi *bm;
1298 
1299                 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
1300                 err = br_boolopt_multi_toggle(br, bm, extack);
1301                 if (err)
1302                         return err;
1303         }
1304 
1305         return 0;
1306 }
1307 
1308 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1309                           struct nlattr *tb[], struct nlattr *data[],
1310                           struct netlink_ext_ack *extack)
1311 {
1312         struct net_bridge *br = netdev_priv(dev);
1313         int err;
1314 
1315         err = register_netdevice(dev);
1316         if (err)
1317                 return err;
1318 
1319         if (tb[IFLA_ADDRESS]) {
1320                 spin_lock_bh(&br->lock);
1321                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1322                 spin_unlock_bh(&br->lock);
1323         }
1324 
1325         err = br_changelink(dev, tb, data, extack);
1326         if (err)
1327                 br_dev_delete(dev, NULL);
1328 
1329         return err;
1330 }
1331 
1332 static size_t br_get_size(const struct net_device *brdev)
1333 {
1334         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1335                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1336                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1337                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1338                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1339                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1340                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1341 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1342                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1343                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1344                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1345                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_PER_PORT */
1346 #endif
1347                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1348                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1349                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1350                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1351                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1352                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1353                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1354                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1355                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1356                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1357                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1358                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1359 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1360                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1361                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1362                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1363                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1364                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1365                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1366                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1367                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1368                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1369                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1370                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1371                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1372                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1373                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1374                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1375                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1376                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1377 #endif
1378 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1379                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1380                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1381                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1382 #endif
1383                nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
1384                0;
1385 }
1386 
1387 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1388 {
1389         struct net_bridge *br = netdev_priv(brdev);
1390         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1391         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1392         u32 age_time = jiffies_to_clock_t(br->max_age);
1393         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1394         u32 stp_enabled = br->stp_enabled;
1395         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1396         u8 vlan_enabled = br_vlan_enabled(br->dev);
1397         struct br_boolopt_multi bm;
1398         u64 clockval;
1399 
1400         clockval = br_timer_value(&br->hello_timer);
1401         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1402                 return -EMSGSIZE;
1403         clockval = br_timer_value(&br->tcn_timer);
1404         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1405                 return -EMSGSIZE;
1406         clockval = br_timer_value(&br->topology_change_timer);
1407         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1408                               IFLA_BR_PAD))
1409                 return -EMSGSIZE;
1410         clockval = br_timer_value(&br->gc_work.timer);
1411         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1412                 return -EMSGSIZE;
1413 
1414         br_boolopt_multi_get(br, &bm);
1415         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1416             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1417             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1418             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1419             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1420             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1421             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1422             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1423             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1424                     &br->bridge_id) ||
1425             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1426                     &br->designated_root) ||
1427             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1428             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1429             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1430             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1431                        br->topology_change_detected) ||
1432             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
1433             nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
1434                 return -EMSGSIZE;
1435 
1436 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1437         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1438             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1439             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1440                        br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1441             nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1442                        br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)))
1443                 return -EMSGSIZE;
1444 #endif
1445 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1446         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1447             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1448                        br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1449             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1450                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1451             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1452                        br_opt_get(br, BROPT_MULTICAST_QUERIER)) ||
1453             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1454                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1455             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
1456             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1457             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1458                         br->multicast_last_member_count) ||
1459             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1460                         br->multicast_startup_query_count) ||
1461             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1462                        br->multicast_igmp_version))
1463                 return -EMSGSIZE;
1464 #if IS_ENABLED(CONFIG_IPV6)
1465         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1466                        br->multicast_mld_version))
1467                 return -EMSGSIZE;
1468 #endif
1469         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1470         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1471                               IFLA_BR_PAD))
1472                 return -EMSGSIZE;
1473         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1474         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1475                               IFLA_BR_PAD))
1476                 return -EMSGSIZE;
1477         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1478         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1479                               IFLA_BR_PAD))
1480                 return -EMSGSIZE;
1481         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1482         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1483                               IFLA_BR_PAD))
1484                 return -EMSGSIZE;
1485         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1486         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1487                               IFLA_BR_PAD))
1488                 return -EMSGSIZE;
1489         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1490         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1491                               IFLA_BR_PAD))
1492                 return -EMSGSIZE;
1493 #endif
1494 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1495         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1496                        br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1497             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1498                        br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1499             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1500                        br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1501                 return -EMSGSIZE;
1502 #endif
1503 
1504         return 0;
1505 }
1506 
1507 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1508 {
1509         struct net_bridge_port *p = NULL;
1510         struct net_bridge_vlan_group *vg;
1511         struct net_bridge_vlan *v;
1512         struct net_bridge *br;
1513         int numvls = 0;
1514 
1515         switch (attr) {
1516         case IFLA_STATS_LINK_XSTATS:
1517                 br = netdev_priv(dev);
1518                 vg = br_vlan_group(br);
1519                 break;
1520         case IFLA_STATS_LINK_XSTATS_SLAVE:
1521                 p = br_port_get_rtnl(dev);
1522                 if (!p)
1523                         return 0;
1524                 br = p->br;
1525                 vg = nbp_vlan_group(p);
1526                 break;
1527         default:
1528                 return 0;
1529         }
1530 
1531         if (vg) {
1532                 /* we need to count all, even placeholder entries */
1533                 list_for_each_entry(v, &vg->vlan_list, vlist)
1534                         numvls++;
1535         }
1536 
1537         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1538                nla_total_size(sizeof(struct br_mcast_stats)) +
1539                nla_total_size(0);
1540 }
1541 
1542 static int br_fill_linkxstats(struct sk_buff *skb,
1543                               const struct net_device *dev,
1544                               int *prividx, int attr)
1545 {
1546         struct nlattr *nla __maybe_unused;
1547         struct net_bridge_port *p = NULL;
1548         struct net_bridge_vlan_group *vg;
1549         struct net_bridge_vlan *v;
1550         struct net_bridge *br;
1551         struct nlattr *nest;
1552         int vl_idx = 0;
1553 
1554         switch (attr) {
1555         case IFLA_STATS_LINK_XSTATS:
1556                 br = netdev_priv(dev);
1557                 vg = br_vlan_group(br);
1558                 break;
1559         case IFLA_STATS_LINK_XSTATS_SLAVE:
1560                 p = br_port_get_rtnl(dev);
1561                 if (!p)
1562                         return 0;
1563                 br = p->br;
1564                 vg = nbp_vlan_group(p);
1565                 break;
1566         default:
1567                 return -EINVAL;
1568         }
1569 
1570         nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE);
1571         if (!nest)
1572                 return -EMSGSIZE;
1573 
1574         if (vg) {
1575                 u16 pvid;
1576 
1577                 pvid = br_get_pvid(vg);
1578                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1579                         struct bridge_vlan_xstats vxi;
1580                         struct br_vlan_stats stats;
1581 
1582                         if (++vl_idx < *prividx)
1583                                 continue;
1584                         memset(&vxi, 0, sizeof(vxi));
1585                         vxi.vid = v->vid;
1586                         vxi.flags = v->flags;
1587                         if (v->vid == pvid)
1588                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1589                         br_vlan_get_stats(v, &stats);
1590                         vxi.rx_bytes = stats.rx_bytes;
1591                         vxi.rx_packets = stats.rx_packets;
1592                         vxi.tx_bytes = stats.tx_bytes;
1593                         vxi.tx_packets = stats.tx_packets;
1594 
1595                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1596                                 goto nla_put_failure;
1597                 }
1598         }
1599 
1600 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1601         if (++vl_idx >= *prividx) {
1602                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1603                                         sizeof(struct br_mcast_stats),
1604                                         BRIDGE_XSTATS_PAD);
1605                 if (!nla)
1606                         goto nla_put_failure;
1607                 br_multicast_get_stats(br, p, nla_data(nla));
1608         }
1609 #endif
1610         nla_nest_end(skb, nest);
1611         *prividx = 0;
1612 
1613         return 0;
1614 
1615 nla_put_failure:
1616         nla_nest_end(skb, nest);
1617         *prividx = vl_idx;
1618 
1619         return -EMSGSIZE;
1620 }
1621 
1622 static struct rtnl_af_ops br_af_ops __read_mostly = {
1623         .family                 = AF_BRIDGE,
1624         .get_link_af_size       = br_get_link_af_size_filtered,
1625 };
1626 
1627 struct rtnl_link_ops br_link_ops __read_mostly = {
1628         .kind                   = "bridge",
1629         .priv_size              = sizeof(struct net_bridge),
1630         .setup                  = br_dev_setup,
1631         .maxtype                = IFLA_BR_MAX,
1632         .policy                 = br_policy,
1633         .validate               = br_validate,
1634         .newlink                = br_dev_newlink,
1635         .changelink             = br_changelink,
1636         .dellink                = br_dev_delete,
1637         .get_size               = br_get_size,
1638         .fill_info              = br_fill_info,
1639         .fill_linkxstats        = br_fill_linkxstats,
1640         .get_linkxstats_size    = br_get_linkxstats_size,
1641 
1642         .slave_maxtype          = IFLA_BRPORT_MAX,
1643         .slave_policy           = br_port_policy,
1644         .slave_changelink       = br_port_slave_changelink,
1645         .get_slave_size         = br_port_get_slave_size,
1646         .fill_slave_info        = br_port_fill_slave_info,
1647 };
1648 
1649 int __init br_netlink_init(void)
1650 {
1651         int err;
1652 
1653         br_mdb_init();
1654         rtnl_af_register(&br_af_ops);
1655 
1656         err = rtnl_link_register(&br_link_ops);
1657         if (err)
1658                 goto out_af;
1659 
1660         return 0;
1661 
1662 out_af:
1663         rtnl_af_unregister(&br_af_ops);
1664         br_mdb_uninit();
1665         return err;
1666 }
1667 
1668 void br_netlink_fini(void)
1669 {
1670         br_mdb_uninit();
1671         rtnl_af_unregister(&br_af_ops);
1672         rtnl_link_unregister(&br_link_ops);
1673 }
1674 

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