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

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