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TOMOYO Linux Cross Reference
Linux/net/bridge/br_netlink.c

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  1 /*
  2  *      Bridge netlink control interface
  3  *
  4  *      Authors:
  5  *      Stephen Hemminger               <shemminger@osdl.org>
  6  *
  7  *      This program is free software; you can redistribute it and/or
  8  *      modify it under the terms of the GNU General Public License
  9  *      as published by the Free Software Foundation; either version
 10  *      2 of the License, or (at your option) any later version.
 11  */
 12 
 13 #include <linux/kernel.h>
 14 #include <linux/slab.h>
 15 #include <linux/etherdevice.h>
 16 #include <net/rtnetlink.h>
 17 #include <net/net_namespace.h>
 18 #include <net/sock.h>
 19 #include <uapi/linux/if_bridge.h>
 20 
 21 #include "br_private.h"
 22 #include "br_private_stp.h"
 23 #include "br_private_tunnel.h"
 24 
 25 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
 26                                 u32 filter_mask)
 27 {
 28         struct net_bridge_vlan *v;
 29         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 30         u16 flags, pvid;
 31         int num_vlans = 0;
 32 
 33         if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
 34                 return 0;
 35 
 36         pvid = br_get_pvid(vg);
 37         /* Count number of vlan infos */
 38         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 39                 flags = 0;
 40                 /* only a context, bridge vlan not activated */
 41                 if (!br_vlan_should_use(v))
 42                         continue;
 43                 if (v->vid == pvid)
 44                         flags |= BRIDGE_VLAN_INFO_PVID;
 45 
 46                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 47                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 48 
 49                 if (vid_range_start == 0) {
 50                         goto initvars;
 51                 } else if ((v->vid - vid_range_end) == 1 &&
 52                         flags == vid_range_flags) {
 53                         vid_range_end = v->vid;
 54                         continue;
 55                 } else {
 56                         if ((vid_range_end - vid_range_start) > 0)
 57                                 num_vlans += 2;
 58                         else
 59                                 num_vlans += 1;
 60                 }
 61 initvars:
 62                 vid_range_start = v->vid;
 63                 vid_range_end = v->vid;
 64                 vid_range_flags = flags;
 65         }
 66 
 67         if (vid_range_start != 0) {
 68                 if ((vid_range_end - vid_range_start) > 0)
 69                         num_vlans += 2;
 70                 else
 71                         num_vlans += 1;
 72         }
 73 
 74         return num_vlans;
 75 }
 76 
 77 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
 78                                  u32 filter_mask)
 79 {
 80         int num_vlans;
 81 
 82         if (!vg)
 83                 return 0;
 84 
 85         if (filter_mask & RTEXT_FILTER_BRVLAN)
 86                 return vg->num_vlans;
 87 
 88         rcu_read_lock();
 89         num_vlans = __get_num_vlan_infos(vg, filter_mask);
 90         rcu_read_unlock();
 91 
 92         return num_vlans;
 93 }
 94 
 95 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
 96                                            u32 filter_mask)
 97 {
 98         struct net_bridge_vlan_group *vg = NULL;
 99         struct net_bridge_port *p = NULL;
100         struct net_bridge *br;
101         int num_vlan_infos;
102         size_t vinfo_sz = 0;
103 
104         rcu_read_lock();
105         if (br_port_exists(dev)) {
106                 p = br_port_get_rcu(dev);
107                 vg = nbp_vlan_group_rcu(p);
108         } else if (dev->priv_flags & IFF_EBRIDGE) {
109                 br = netdev_priv(dev);
110                 vg = br_vlan_group_rcu(br);
111         }
112         num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
113         rcu_read_unlock();
114 
115         if (p && (p->flags & BR_VLAN_TUNNEL))
116                 vinfo_sz += br_get_vlan_tunnel_info_size(vg);
117 
118         /* Each VLAN is returned in bridge_vlan_info along with flags */
119         vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
120 
121         return vinfo_sz;
122 }
123 
124 static inline size_t br_port_info_size(void)
125 {
126         return nla_total_size(1)        /* IFLA_BRPORT_STATE  */
127                 + nla_total_size(2)     /* IFLA_BRPORT_PRIORITY */
128                 + nla_total_size(4)     /* IFLA_BRPORT_COST */
129                 + nla_total_size(1)     /* IFLA_BRPORT_MODE */
130                 + nla_total_size(1)     /* IFLA_BRPORT_GUARD */
131                 + nla_total_size(1)     /* IFLA_BRPORT_PROTECT */
132                 + nla_total_size(1)     /* IFLA_BRPORT_FAST_LEAVE */
133                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_TO_UCAST */
134                 + nla_total_size(1)     /* IFLA_BRPORT_LEARNING */
135                 + nla_total_size(1)     /* IFLA_BRPORT_UNICAST_FLOOD */
136                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_FLOOD */
137                 + nla_total_size(1)     /* IFLA_BRPORT_BCAST_FLOOD */
138                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP */
139                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP_WIFI */
140                 + nla_total_size(1)     /* IFLA_BRPORT_VLAN_TUNNEL */
141                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
142                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
143                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_PORT */
144                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_COST */
145                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_ID */
146                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_NO */
147                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
148                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_CONFIG_PENDING */
149                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
150                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
151                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
152 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
153                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MULTICAST_ROUTER */
154 #endif
155                 + 0;
156 }
157 
158 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
159 {
160         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
161                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
162                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
163                 + nla_total_size(4) /* IFLA_MASTER */
164                 + nla_total_size(4) /* IFLA_MTU */
165                 + nla_total_size(4) /* IFLA_LINK */
166                 + nla_total_size(1) /* IFLA_OPERSTATE */
167                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
168                 + nla_total_size(br_get_link_af_size_filtered(dev,
169                                  filter_mask)); /* IFLA_AF_SPEC */
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         u64 timerval;
177 
178         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
179             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
180             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
181             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
182             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
183             nla_put_u8(skb, IFLA_BRPORT_PROTECT,
184                        !!(p->flags & BR_ROOT_BLOCK)) ||
185             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
186                        !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
187             nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
188                        !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
189             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
190             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
191                        !!(p->flags & BR_FLOOD)) ||
192             nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
193                        !!(p->flags & BR_MCAST_FLOOD)) ||
194             nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
195                        !!(p->flags & BR_BCAST_FLOOD)) ||
196             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
197             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
198                        !!(p->flags & BR_PROXYARP_WIFI)) ||
199             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
200                     &p->designated_root) ||
201             nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
202                     &p->designated_bridge) ||
203             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
204             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
205             nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
206             nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
207             nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
208                        p->topology_change_ack) ||
209             nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
210             nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
211                                                         BR_VLAN_TUNNEL)))
212                 return -EMSGSIZE;
213 
214         timerval = br_timer_value(&p->message_age_timer);
215         if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
216                               IFLA_BRPORT_PAD))
217                 return -EMSGSIZE;
218         timerval = br_timer_value(&p->forward_delay_timer);
219         if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
220                               IFLA_BRPORT_PAD))
221                 return -EMSGSIZE;
222         timerval = br_timer_value(&p->hold_timer);
223         if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
224                               IFLA_BRPORT_PAD))
225                 return -EMSGSIZE;
226 
227 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
228         if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
229                        p->multicast_router))
230                 return -EMSGSIZE;
231 #endif
232 
233         return 0;
234 }
235 
236 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
237                                     u16 vid_end, u16 flags)
238 {
239         struct  bridge_vlan_info vinfo;
240 
241         if ((vid_end - vid_start) > 0) {
242                 /* add range to skb */
243                 vinfo.vid = vid_start;
244                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
245                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
246                             sizeof(vinfo), &vinfo))
247                         goto nla_put_failure;
248 
249                 vinfo.vid = vid_end;
250                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
251                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
252                             sizeof(vinfo), &vinfo))
253                         goto nla_put_failure;
254         } else {
255                 vinfo.vid = vid_start;
256                 vinfo.flags = flags;
257                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
258                             sizeof(vinfo), &vinfo))
259                         goto nla_put_failure;
260         }
261 
262         return 0;
263 
264 nla_put_failure:
265         return -EMSGSIZE;
266 }
267 
268 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
269                                          struct net_bridge_vlan_group *vg)
270 {
271         struct net_bridge_vlan *v;
272         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
273         u16 flags, pvid;
274         int err = 0;
275 
276         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
277          * and mark vlan info with begin and end flags
278          * if vlaninfo represents a range
279          */
280         pvid = br_get_pvid(vg);
281         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
282                 flags = 0;
283                 if (!br_vlan_should_use(v))
284                         continue;
285                 if (v->vid == pvid)
286                         flags |= BRIDGE_VLAN_INFO_PVID;
287 
288                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
289                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
290 
291                 if (vid_range_start == 0) {
292                         goto initvars;
293                 } else if ((v->vid - vid_range_end) == 1 &&
294                         flags == vid_range_flags) {
295                         vid_range_end = v->vid;
296                         continue;
297                 } else {
298                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
299                                                        vid_range_end,
300                                                        vid_range_flags);
301                         if (err)
302                                 return err;
303                 }
304 
305 initvars:
306                 vid_range_start = v->vid;
307                 vid_range_end = v->vid;
308                 vid_range_flags = flags;
309         }
310 
311         if (vid_range_start != 0) {
312                 /* Call it once more to send any left over vlans */
313                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
314                                                vid_range_end,
315                                                vid_range_flags);
316                 if (err)
317                         return err;
318         }
319 
320         return 0;
321 }
322 
323 static int br_fill_ifvlaninfo(struct sk_buff *skb,
324                               struct net_bridge_vlan_group *vg)
325 {
326         struct bridge_vlan_info vinfo;
327         struct net_bridge_vlan *v;
328         u16 pvid;
329 
330         pvid = br_get_pvid(vg);
331         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
332                 if (!br_vlan_should_use(v))
333                         continue;
334 
335                 vinfo.vid = v->vid;
336                 vinfo.flags = 0;
337                 if (v->vid == pvid)
338                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
339 
340                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
341                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
342 
343                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
344                             sizeof(vinfo), &vinfo))
345                         goto nla_put_failure;
346         }
347 
348         return 0;
349 
350 nla_put_failure:
351         return -EMSGSIZE;
352 }
353 
354 /*
355  * Create one netlink message for one interface
356  * Contains port and master info as well as carrier and bridge state.
357  */
358 static int br_fill_ifinfo(struct sk_buff *skb,
359                           struct net_bridge_port *port,
360                           u32 pid, u32 seq, int event, unsigned int flags,
361                           u32 filter_mask, const struct net_device *dev)
362 {
363         struct net_bridge *br;
364         struct ifinfomsg *hdr;
365         struct nlmsghdr *nlh;
366         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
367 
368         if (port)
369                 br = port->br;
370         else
371                 br = netdev_priv(dev);
372 
373         br_debug(br, "br_fill_info event %d port %s master %s\n",
374                      event, dev->name, br->dev->name);
375 
376         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
377         if (nlh == NULL)
378                 return -EMSGSIZE;
379 
380         hdr = nlmsg_data(nlh);
381         hdr->ifi_family = AF_BRIDGE;
382         hdr->__ifi_pad = 0;
383         hdr->ifi_type = dev->type;
384         hdr->ifi_index = dev->ifindex;
385         hdr->ifi_flags = dev_get_flags(dev);
386         hdr->ifi_change = 0;
387 
388         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
389             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
390             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
391             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
392             (dev->addr_len &&
393              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
394             (dev->ifindex != dev_get_iflink(dev) &&
395              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
396                 goto nla_put_failure;
397 
398         if (event == RTM_NEWLINK && port) {
399                 struct nlattr *nest
400                         = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
401 
402                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
403                         goto nla_put_failure;
404                 nla_nest_end(skb, nest);
405         }
406 
407         /* Check if  the VID information is requested */
408         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
409             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
410                 struct net_bridge_vlan_group *vg;
411                 struct nlattr *af;
412                 int err;
413 
414                 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
415                 rcu_read_lock();
416                 if (port)
417                         vg = nbp_vlan_group_rcu(port);
418                 else
419                         vg = br_vlan_group_rcu(br);
420 
421                 if (!vg || !vg->num_vlans) {
422                         rcu_read_unlock();
423                         goto done;
424                 }
425                 af = nla_nest_start(skb, IFLA_AF_SPEC);
426                 if (!af) {
427                         rcu_read_unlock();
428                         goto nla_put_failure;
429                 }
430                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
431                         err = br_fill_ifvlaninfo_compressed(skb, vg);
432                 else
433                         err = br_fill_ifvlaninfo(skb, vg);
434 
435                 if (port && (port->flags & BR_VLAN_TUNNEL))
436                         err = br_fill_vlan_tunnel_info(skb, vg);
437                 rcu_read_unlock();
438                 if (err)
439                         goto nla_put_failure;
440                 nla_nest_end(skb, af);
441         }
442 
443 done:
444         nlmsg_end(skb, nlh);
445         return 0;
446 
447 nla_put_failure:
448         nlmsg_cancel(skb, nlh);
449         return -EMSGSIZE;
450 }
451 
452 /*
453  * Notify listeners of a change in port information
454  */
455 void br_ifinfo_notify(int event, struct net_bridge_port *port)
456 {
457         struct net *net;
458         struct sk_buff *skb;
459         int err = -ENOBUFS;
460         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
461 
462         if (!port)
463                 return;
464 
465         net = dev_net(port->dev);
466         br_debug(port->br, "port %u(%s) event %d\n",
467                  (unsigned int)port->port_no, port->dev->name, event);
468 
469         skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
470         if (skb == NULL)
471                 goto errout;
472 
473         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
474         if (err < 0) {
475                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
476                 WARN_ON(err == -EMSGSIZE);
477                 kfree_skb(skb);
478                 goto errout;
479         }
480         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
481         return;
482 errout:
483         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
484 }
485 
486 
487 /*
488  * Dump information about all ports, in response to GETLINK
489  */
490 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
491                struct net_device *dev, u32 filter_mask, int nlflags)
492 {
493         struct net_bridge_port *port = br_port_get_rtnl(dev);
494 
495         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
496             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
497                 return 0;
498 
499         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
500                               filter_mask, dev);
501 }
502 
503 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
504                         int cmd, struct bridge_vlan_info *vinfo)
505 {
506         int err = 0;
507 
508         switch (cmd) {
509         case RTM_SETLINK:
510                 if (p) {
511                         /* if the MASTER flag is set this will act on the global
512                          * per-VLAN entry as well
513                          */
514                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
515                         if (err)
516                                 break;
517                 } else {
518                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
519                         err = br_vlan_add(br, vinfo->vid, vinfo->flags);
520                 }
521                 break;
522 
523         case RTM_DELLINK:
524                 if (p) {
525                         nbp_vlan_delete(p, vinfo->vid);
526                         if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
527                                 br_vlan_delete(p->br, vinfo->vid);
528                 } else {
529                         br_vlan_delete(br, vinfo->vid);
530                 }
531                 break;
532         }
533 
534         return err;
535 }
536 
537 static int br_process_vlan_info(struct net_bridge *br,
538                                 struct net_bridge_port *p, int cmd,
539                                 struct bridge_vlan_info *vinfo_curr,
540                                 struct bridge_vlan_info **vinfo_last)
541 {
542         if (!vinfo_curr->vid || vinfo_curr->vid >= VLAN_VID_MASK)
543                 return -EINVAL;
544 
545         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
546                 /* check if we are already processing a range */
547                 if (*vinfo_last)
548                         return -EINVAL;
549                 *vinfo_last = vinfo_curr;
550                 /* don't allow range of pvids */
551                 if ((*vinfo_last)->flags & BRIDGE_VLAN_INFO_PVID)
552                         return -EINVAL;
553                 return 0;
554         }
555 
556         if (*vinfo_last) {
557                 struct bridge_vlan_info tmp_vinfo;
558                 int v, err;
559 
560                 if (!(vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END))
561                         return -EINVAL;
562 
563                 if (vinfo_curr->vid <= (*vinfo_last)->vid)
564                         return -EINVAL;
565 
566                 memcpy(&tmp_vinfo, *vinfo_last,
567                        sizeof(struct bridge_vlan_info));
568                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
569                         tmp_vinfo.vid = v;
570                         err = br_vlan_info(br, p, cmd, &tmp_vinfo);
571                         if (err)
572                                 break;
573                 }
574                 *vinfo_last = NULL;
575 
576                 return err;
577         }
578 
579         return br_vlan_info(br, p, cmd, vinfo_curr);
580 }
581 
582 static int br_afspec(struct net_bridge *br,
583                      struct net_bridge_port *p,
584                      struct nlattr *af_spec,
585                      int cmd)
586 {
587         struct bridge_vlan_info *vinfo_curr = NULL;
588         struct bridge_vlan_info *vinfo_last = NULL;
589         struct nlattr *attr;
590         struct vtunnel_info tinfo_last = {};
591         struct vtunnel_info tinfo_curr = {};
592         int err = 0, rem;
593 
594         nla_for_each_nested(attr, af_spec, rem) {
595                 err = 0;
596                 switch (nla_type(attr)) {
597                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
598                         if (!p || !(p->flags & BR_VLAN_TUNNEL))
599                                 return -EINVAL;
600                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
601                         if (err)
602                                 return err;
603                         err = br_process_vlan_tunnel_info(br, p, cmd,
604                                                           &tinfo_curr,
605                                                           &tinfo_last);
606                         if (err)
607                                 return err;
608                         break;
609                 case IFLA_BRIDGE_VLAN_INFO:
610                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
611                                 return -EINVAL;
612                         vinfo_curr = nla_data(attr);
613                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
614                                                    &vinfo_last);
615                         if (err)
616                                 return err;
617                         break;
618                 }
619         }
620 
621         return err;
622 }
623 
624 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
625         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
626         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
627         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
628         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
629         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
630         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
631         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
632         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
633         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
634         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
635         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
636         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
637         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
638         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
639         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
640 };
641 
642 /* Change the state of the port and notify spanning tree */
643 static int br_set_port_state(struct net_bridge_port *p, u8 state)
644 {
645         if (state > BR_STATE_BLOCKING)
646                 return -EINVAL;
647 
648         /* if kernel STP is running, don't allow changes */
649         if (p->br->stp_enabled == BR_KERNEL_STP)
650                 return -EBUSY;
651 
652         /* if device is not up, change is not allowed
653          * if link is not present, only allowable state is disabled
654          */
655         if (!netif_running(p->dev) ||
656             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
657                 return -ENETDOWN;
658 
659         br_set_state(p, state);
660         br_port_state_selection(p->br);
661         return 0;
662 }
663 
664 /* Set/clear or port flags based on attribute */
665 static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
666                             int attrtype, unsigned long mask)
667 {
668         unsigned long flags;
669         int err;
670 
671         if (!tb[attrtype])
672                 return 0;
673 
674         if (nla_get_u8(tb[attrtype]))
675                 flags = p->flags | mask;
676         else
677                 flags = p->flags & ~mask;
678 
679         err = br_switchdev_set_port_flag(p, flags, mask);
680         if (err)
681                 return err;
682 
683         p->flags = flags;
684         return 0;
685 }
686 
687 /* Process bridge protocol info on port */
688 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
689 {
690         unsigned long old_flags = p->flags;
691         bool br_vlan_tunnel_old = false;
692         int err;
693 
694         err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
695         if (err)
696                 return err;
697 
698         err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
699         if (err)
700                 return err;
701 
702         err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
703         if (err)
704                 return err;
705 
706         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
707         if (err)
708                 return err;
709 
710         err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
711         if (err)
712                 return err;
713 
714         err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
715         if (err)
716                 return err;
717 
718         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
719         if (err)
720                 return err;
721 
722         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
723         if (err)
724                 return err;
725 
726         err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
727         if (err)
728                 return err;
729 
730         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
731         if (err)
732                 return err;
733 
734         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
735         if (err)
736                 return err;
737 
738         br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
739         err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
740         if (err)
741                 return err;
742 
743         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
744                 nbp_vlan_tunnel_info_flush(p);
745 
746         if (tb[IFLA_BRPORT_COST]) {
747                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
748                 if (err)
749                         return err;
750         }
751 
752         if (tb[IFLA_BRPORT_PRIORITY]) {
753                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
754                 if (err)
755                         return err;
756         }
757 
758         if (tb[IFLA_BRPORT_STATE]) {
759                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
760                 if (err)
761                         return err;
762         }
763 
764         if (tb[IFLA_BRPORT_FLUSH])
765                 br_fdb_delete_by_port(p->br, p, 0, 0);
766 
767 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
768         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
769                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
770 
771                 err = br_multicast_set_port_router(p, mcast_router);
772                 if (err)
773                         return err;
774         }
775 #endif
776         br_port_flags_change(p, old_flags ^ p->flags);
777         return 0;
778 }
779 
780 /* Change state and parameters on port. */
781 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
782 {
783         struct nlattr *protinfo;
784         struct nlattr *afspec;
785         struct net_bridge_port *p;
786         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
787         int err = 0;
788 
789         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
790         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
791         if (!protinfo && !afspec)
792                 return 0;
793 
794         p = br_port_get_rtnl(dev);
795         /* We want to accept dev as bridge itself if the AF_SPEC
796          * is set to see if someone is setting vlan info on the bridge
797          */
798         if (!p && !afspec)
799                 return -EINVAL;
800 
801         if (p && protinfo) {
802                 if (protinfo->nla_type & NLA_F_NESTED) {
803                         err = nla_parse_nested(tb, IFLA_BRPORT_MAX, protinfo,
804                                                br_port_policy, NULL);
805                         if (err)
806                                 return err;
807 
808                         spin_lock_bh(&p->br->lock);
809                         err = br_setport(p, tb);
810                         spin_unlock_bh(&p->br->lock);
811                 } else {
812                         /* Binary compatibility with old RSTP */
813                         if (nla_len(protinfo) < sizeof(u8))
814                                 return -EINVAL;
815 
816                         spin_lock_bh(&p->br->lock);
817                         err = br_set_port_state(p, nla_get_u8(protinfo));
818                         spin_unlock_bh(&p->br->lock);
819                 }
820                 if (err)
821                         goto out;
822         }
823 
824         if (afspec) {
825                 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
826                                 afspec, RTM_SETLINK);
827         }
828 
829         if (err == 0)
830                 br_ifinfo_notify(RTM_NEWLINK, p);
831 out:
832         return err;
833 }
834 
835 /* Delete port information */
836 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
837 {
838         struct nlattr *afspec;
839         struct net_bridge_port *p;
840         int err = 0;
841 
842         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
843         if (!afspec)
844                 return 0;
845 
846         p = br_port_get_rtnl(dev);
847         /* We want to accept dev as bridge itself as well */
848         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
849                 return -EINVAL;
850 
851         err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
852                         afspec, RTM_DELLINK);
853         if (err == 0)
854                 /* Send RTM_NEWLINK because userspace
855                  * expects RTM_NEWLINK for vlan dels
856                  */
857                 br_ifinfo_notify(RTM_NEWLINK, p);
858 
859         return err;
860 }
861 
862 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
863                        struct netlink_ext_ack *extack)
864 {
865         if (tb[IFLA_ADDRESS]) {
866                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
867                         return -EINVAL;
868                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
869                         return -EADDRNOTAVAIL;
870         }
871 
872         if (!data)
873                 return 0;
874 
875 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
876         if (data[IFLA_BR_VLAN_PROTOCOL]) {
877                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
878                 case htons(ETH_P_8021Q):
879                 case htons(ETH_P_8021AD):
880                         break;
881                 default:
882                         return -EPROTONOSUPPORT;
883                 }
884         }
885 
886         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
887                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
888 
889                 if (defpvid >= VLAN_VID_MASK)
890                         return -EINVAL;
891         }
892 #endif
893 
894         return 0;
895 }
896 
897 static int br_port_slave_changelink(struct net_device *brdev,
898                                     struct net_device *dev,
899                                     struct nlattr *tb[],
900                                     struct nlattr *data[],
901                                     struct netlink_ext_ack *extack)
902 {
903         struct net_bridge *br = netdev_priv(brdev);
904         int ret;
905 
906         if (!data)
907                 return 0;
908 
909         spin_lock_bh(&br->lock);
910         ret = br_setport(br_port_get_rtnl(dev), data);
911         spin_unlock_bh(&br->lock);
912 
913         return ret;
914 }
915 
916 static int br_port_fill_slave_info(struct sk_buff *skb,
917                                    const struct net_device *brdev,
918                                    const struct net_device *dev)
919 {
920         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
921 }
922 
923 static size_t br_port_get_slave_size(const struct net_device *brdev,
924                                      const struct net_device *dev)
925 {
926         return br_port_info_size();
927 }
928 
929 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
930         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
931         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
932         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
933         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
934         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
935         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
936         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
937         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
938         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
939         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
940                                  .len  = ETH_ALEN },
941         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
942         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
943         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
944         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
945         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
946         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
947         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
948         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
949         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
950         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
951         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
952         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
953         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
954         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
955         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
956         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
957         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
958         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
959         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
960         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
961         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
962         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
963 };
964 
965 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
966                          struct nlattr *data[],
967                          struct netlink_ext_ack *extack)
968 {
969         struct net_bridge *br = netdev_priv(brdev);
970         int err;
971 
972         if (!data)
973                 return 0;
974 
975         if (data[IFLA_BR_FORWARD_DELAY]) {
976                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
977                 if (err)
978                         return err;
979         }
980 
981         if (data[IFLA_BR_HELLO_TIME]) {
982                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
983                 if (err)
984                         return err;
985         }
986 
987         if (data[IFLA_BR_MAX_AGE]) {
988                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
989                 if (err)
990                         return err;
991         }
992 
993         if (data[IFLA_BR_AGEING_TIME]) {
994                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
995                 if (err)
996                         return err;
997         }
998 
999         if (data[IFLA_BR_STP_STATE]) {
1000                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1001 
1002                 br_stp_set_enabled(br, stp_enabled);
1003         }
1004 
1005         if (data[IFLA_BR_PRIORITY]) {
1006                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1007 
1008                 br_stp_set_bridge_priority(br, priority);
1009         }
1010 
1011         if (data[IFLA_BR_VLAN_FILTERING]) {
1012                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1013 
1014                 err = __br_vlan_filter_toggle(br, vlan_filter);
1015                 if (err)
1016                         return err;
1017         }
1018 
1019 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1020         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1021                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1022 
1023                 err = __br_vlan_set_proto(br, vlan_proto);
1024                 if (err)
1025                         return err;
1026         }
1027 
1028         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1029                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1030 
1031                 err = __br_vlan_set_default_pvid(br, defpvid);
1032                 if (err)
1033                         return err;
1034         }
1035 
1036         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1037                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1038 
1039                 err = br_vlan_set_stats(br, vlan_stats);
1040                 if (err)
1041                         return err;
1042         }
1043 #endif
1044 
1045         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1046                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1047 
1048                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1049                         return -EINVAL;
1050                 br->group_fwd_mask = fwd_mask;
1051         }
1052 
1053         if (data[IFLA_BR_GROUP_ADDR]) {
1054                 u8 new_addr[ETH_ALEN];
1055 
1056                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1057                         return -EINVAL;
1058                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1059                 if (!is_link_local_ether_addr(new_addr))
1060                         return -EINVAL;
1061                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1062                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1063                     new_addr[5] == 3)           /* 802.1X PAE address */
1064                         return -EINVAL;
1065                 spin_lock_bh(&br->lock);
1066                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1067                 spin_unlock_bh(&br->lock);
1068                 br->group_addr_set = true;
1069                 br_recalculate_fwd_mask(br);
1070         }
1071 
1072         if (data[IFLA_BR_FDB_FLUSH])
1073                 br_fdb_flush(br);
1074 
1075 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1076         if (data[IFLA_BR_MCAST_ROUTER]) {
1077                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1078 
1079                 err = br_multicast_set_router(br, multicast_router);
1080                 if (err)
1081                         return err;
1082         }
1083 
1084         if (data[IFLA_BR_MCAST_SNOOPING]) {
1085                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1086 
1087                 err = br_multicast_toggle(br, mcast_snooping);
1088                 if (err)
1089                         return err;
1090         }
1091 
1092         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1093                 u8 val;
1094 
1095                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1096                 br->multicast_query_use_ifaddr = !!val;
1097         }
1098 
1099         if (data[IFLA_BR_MCAST_QUERIER]) {
1100                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1101 
1102                 err = br_multicast_set_querier(br, mcast_querier);
1103                 if (err)
1104                         return err;
1105         }
1106 
1107         if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
1108                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
1109 
1110                 br->hash_elasticity = val;
1111         }
1112 
1113         if (data[IFLA_BR_MCAST_HASH_MAX]) {
1114                 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1115 
1116                 err = br_multicast_set_hash_max(br, hash_max);
1117                 if (err)
1118                         return err;
1119         }
1120 
1121         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1122                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1123 
1124                 br->multicast_last_member_count = val;
1125         }
1126 
1127         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1128                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1129 
1130                 br->multicast_startup_query_count = val;
1131         }
1132 
1133         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1134                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1135 
1136                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1137         }
1138 
1139         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1140                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1141 
1142                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1143         }
1144 
1145         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1146                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1147 
1148                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1149         }
1150 
1151         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1152                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1153 
1154                 br->multicast_query_interval = clock_t_to_jiffies(val);
1155         }
1156 
1157         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1158                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1159 
1160                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1161         }
1162 
1163         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1164                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1165 
1166                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1167         }
1168 
1169         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1170                 __u8 mcast_stats;
1171 
1172                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1173                 br->multicast_stats_enabled = !!mcast_stats;
1174         }
1175 
1176         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1177                 __u8 igmp_version;
1178 
1179                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1180                 err = br_multicast_set_igmp_version(br, igmp_version);
1181                 if (err)
1182                         return err;
1183         }
1184 
1185 #if IS_ENABLED(CONFIG_IPV6)
1186         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1187                 __u8 mld_version;
1188 
1189                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1190                 err = br_multicast_set_mld_version(br, mld_version);
1191                 if (err)
1192                         return err;
1193         }
1194 #endif
1195 #endif
1196 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1197         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1198                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1199 
1200                 br->nf_call_iptables = val ? true : false;
1201         }
1202 
1203         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1204                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1205 
1206                 br->nf_call_ip6tables = val ? true : false;
1207         }
1208 
1209         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1210                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1211 
1212                 br->nf_call_arptables = val ? true : false;
1213         }
1214 #endif
1215 
1216         return 0;
1217 }
1218 
1219 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1220                           struct nlattr *tb[], struct nlattr *data[],
1221                           struct netlink_ext_ack *extack)
1222 {
1223         struct net_bridge *br = netdev_priv(dev);
1224         int err;
1225 
1226         if (tb[IFLA_ADDRESS]) {
1227                 spin_lock_bh(&br->lock);
1228                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1229                 spin_unlock_bh(&br->lock);
1230         }
1231 
1232         err = register_netdevice(dev);
1233         if (err)
1234                 return err;
1235 
1236         err = br_changelink(dev, tb, data, extack);
1237         if (err)
1238                 unregister_netdevice(dev);
1239         return err;
1240 }
1241 
1242 static size_t br_get_size(const struct net_device *brdev)
1243 {
1244         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1245                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1246                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1247                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1248                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1249                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1250                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1251 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1252                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1253                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1254                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1255 #endif
1256                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1257                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1258                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1259                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1260                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1261                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1262                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1263                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1264                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1265                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1266                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1267                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1268 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1269                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1270                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1271                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1272                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1273                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1274                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1275                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1276                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1277                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1278                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1279                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1280                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1281                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1282                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1283                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1284                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1285                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1286 #endif
1287 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1288                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1289                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1290                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1291 #endif
1292                0;
1293 }
1294 
1295 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1296 {
1297         struct net_bridge *br = netdev_priv(brdev);
1298         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1299         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1300         u32 age_time = jiffies_to_clock_t(br->max_age);
1301         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1302         u32 stp_enabled = br->stp_enabled;
1303         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1304         u8 vlan_enabled = br_vlan_enabled(br->dev);
1305         u64 clockval;
1306 
1307         clockval = br_timer_value(&br->hello_timer);
1308         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1309                 return -EMSGSIZE;
1310         clockval = br_timer_value(&br->tcn_timer);
1311         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1312                 return -EMSGSIZE;
1313         clockval = br_timer_value(&br->topology_change_timer);
1314         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1315                               IFLA_BR_PAD))
1316                 return -EMSGSIZE;
1317         clockval = br_timer_value(&br->gc_work.timer);
1318         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1319                 return -EMSGSIZE;
1320 
1321         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1322             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1323             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1324             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1325             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1326             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1327             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1328             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1329             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1330                     &br->bridge_id) ||
1331             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1332                     &br->designated_root) ||
1333             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1334             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1335             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1336             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1337                        br->topology_change_detected) ||
1338             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1339                 return -EMSGSIZE;
1340 
1341 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1342         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1343             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1344             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled))
1345                 return -EMSGSIZE;
1346 #endif
1347 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1348         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1349             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1350             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1351                        br->multicast_query_use_ifaddr) ||
1352             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1353             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1354                        br->multicast_stats_enabled) ||
1355             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1356                         br->hash_elasticity) ||
1357             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1358             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1359                         br->multicast_last_member_count) ||
1360             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1361                         br->multicast_startup_query_count) ||
1362             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1363                        br->multicast_igmp_version))
1364                 return -EMSGSIZE;
1365 #if IS_ENABLED(CONFIG_IPV6)
1366         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1367                        br->multicast_mld_version))
1368                 return -EMSGSIZE;
1369 #endif
1370         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1371         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1372                               IFLA_BR_PAD))
1373                 return -EMSGSIZE;
1374         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1375         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1376                               IFLA_BR_PAD))
1377                 return -EMSGSIZE;
1378         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1379         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1380                               IFLA_BR_PAD))
1381                 return -EMSGSIZE;
1382         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1383         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1384                               IFLA_BR_PAD))
1385                 return -EMSGSIZE;
1386         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1387         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1388                               IFLA_BR_PAD))
1389                 return -EMSGSIZE;
1390         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1391         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1392                               IFLA_BR_PAD))
1393                 return -EMSGSIZE;
1394 #endif
1395 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1396         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1397                        br->nf_call_iptables ? 1 : 0) ||
1398             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1399                        br->nf_call_ip6tables ? 1 : 0) ||
1400             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1401                        br->nf_call_arptables ? 1 : 0))
1402                 return -EMSGSIZE;
1403 #endif
1404 
1405         return 0;
1406 }
1407 
1408 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1409 {
1410         struct net_bridge_port *p = NULL;
1411         struct net_bridge_vlan_group *vg;
1412         struct net_bridge_vlan *v;
1413         struct net_bridge *br;
1414         int numvls = 0;
1415 
1416         switch (attr) {
1417         case IFLA_STATS_LINK_XSTATS:
1418                 br = netdev_priv(dev);
1419                 vg = br_vlan_group(br);
1420                 break;
1421         case IFLA_STATS_LINK_XSTATS_SLAVE:
1422                 p = br_port_get_rtnl(dev);
1423                 if (!p)
1424                         return 0;
1425                 br = p->br;
1426                 vg = nbp_vlan_group(p);
1427                 break;
1428         default:
1429                 return 0;
1430         }
1431 
1432         if (vg) {
1433                 /* we need to count all, even placeholder entries */
1434                 list_for_each_entry(v, &vg->vlan_list, vlist)
1435                         numvls++;
1436         }
1437 
1438         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1439                nla_total_size(sizeof(struct br_mcast_stats)) +
1440                nla_total_size(0);
1441 }
1442 
1443 static int br_fill_linkxstats(struct sk_buff *skb,
1444                               const struct net_device *dev,
1445                               int *prividx, int attr)
1446 {
1447         struct nlattr *nla __maybe_unused;
1448         struct net_bridge_port *p = NULL;
1449         struct net_bridge_vlan_group *vg;
1450         struct net_bridge_vlan *v;
1451         struct net_bridge *br;
1452         struct nlattr *nest;
1453         int vl_idx = 0;
1454 
1455         switch (attr) {
1456         case IFLA_STATS_LINK_XSTATS:
1457                 br = netdev_priv(dev);
1458                 vg = br_vlan_group(br);
1459                 break;
1460         case IFLA_STATS_LINK_XSTATS_SLAVE:
1461                 p = br_port_get_rtnl(dev);
1462                 if (!p)
1463                         return 0;
1464                 br = p->br;
1465                 vg = nbp_vlan_group(p);
1466                 break;
1467         default:
1468                 return -EINVAL;
1469         }
1470 
1471         nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE);
1472         if (!nest)
1473                 return -EMSGSIZE;
1474 
1475         if (vg) {
1476                 u16 pvid;
1477 
1478                 pvid = br_get_pvid(vg);
1479                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1480                         struct bridge_vlan_xstats vxi;
1481                         struct br_vlan_stats stats;
1482 
1483                         if (++vl_idx < *prividx)
1484                                 continue;
1485                         memset(&vxi, 0, sizeof(vxi));
1486                         vxi.vid = v->vid;
1487                         vxi.flags = v->flags;
1488                         if (v->vid == pvid)
1489                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1490                         br_vlan_get_stats(v, &stats);
1491                         vxi.rx_bytes = stats.rx_bytes;
1492                         vxi.rx_packets = stats.rx_packets;
1493                         vxi.tx_bytes = stats.tx_bytes;
1494                         vxi.tx_packets = stats.tx_packets;
1495 
1496                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1497                                 goto nla_put_failure;
1498                 }
1499         }
1500 
1501 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1502         if (++vl_idx >= *prividx) {
1503                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1504                                         sizeof(struct br_mcast_stats),
1505                                         BRIDGE_XSTATS_PAD);
1506                 if (!nla)
1507                         goto nla_put_failure;
1508                 br_multicast_get_stats(br, p, nla_data(nla));
1509         }
1510 #endif
1511         nla_nest_end(skb, nest);
1512         *prividx = 0;
1513 
1514         return 0;
1515 
1516 nla_put_failure:
1517         nla_nest_end(skb, nest);
1518         *prividx = vl_idx;
1519 
1520         return -EMSGSIZE;
1521 }
1522 
1523 static struct rtnl_af_ops br_af_ops __read_mostly = {
1524         .family                 = AF_BRIDGE,
1525         .get_link_af_size       = br_get_link_af_size_filtered,
1526 };
1527 
1528 struct rtnl_link_ops br_link_ops __read_mostly = {
1529         .kind                   = "bridge",
1530         .priv_size              = sizeof(struct net_bridge),
1531         .setup                  = br_dev_setup,
1532         .maxtype                = IFLA_BR_MAX,
1533         .policy                 = br_policy,
1534         .validate               = br_validate,
1535         .newlink                = br_dev_newlink,
1536         .changelink             = br_changelink,
1537         .dellink                = br_dev_delete,
1538         .get_size               = br_get_size,
1539         .fill_info              = br_fill_info,
1540         .fill_linkxstats        = br_fill_linkxstats,
1541         .get_linkxstats_size    = br_get_linkxstats_size,
1542 
1543         .slave_maxtype          = IFLA_BRPORT_MAX,
1544         .slave_policy           = br_port_policy,
1545         .slave_changelink       = br_port_slave_changelink,
1546         .get_slave_size         = br_port_get_slave_size,
1547         .fill_slave_info        = br_port_fill_slave_info,
1548 };
1549 
1550 int __init br_netlink_init(void)
1551 {
1552         int err;
1553 
1554         br_mdb_init();
1555         rtnl_af_register(&br_af_ops);
1556 
1557         err = rtnl_link_register(&br_link_ops);
1558         if (err)
1559                 goto out_af;
1560 
1561         return 0;
1562 
1563 out_af:
1564         rtnl_af_unregister(&br_af_ops);
1565         br_mdb_uninit();
1566         return err;
1567 }
1568 
1569 void br_netlink_fini(void)
1570 {
1571         br_mdb_uninit();
1572         rtnl_af_unregister(&br_af_ops);
1573         rtnl_link_unregister(&br_link_ops);
1574 }
1575 

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