net/bridge/br_netlink.c

   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 0;
 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 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
 862 {
 863         if (tb[IFLA_ADDRESS]) {
 864                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 865                         return -EINVAL;
 866                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 867                         return -EADDRNOTAVAIL;
 868         }
 869
 870         if (!data)
 871                 return 0;
 872
 873 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 874         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 875                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
 876                 case htons(ETH_P_8021Q):
 877                 case htons(ETH_P_8021AD):
 878                         break;
 879                 default:
 880                         return -EPROTONOSUPPORT;
 881                 }
 882         }
 883
 884         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 885                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 886
 887                 if (defpvid >= VLAN_VID_MASK)
 888                         return -EINVAL;
 889         }
 890 #endif
 891
 892         return 0;
 893 }
 894
 895 static int br_port_slave_changelink(struct net_device *brdev,
 896                                     struct net_device *dev,
 897                                     struct nlattr *tb[],
 898                                     struct nlattr *data[])
 899 {
 900         struct net_bridge *br = netdev_priv(brdev);
 901         int ret;
 902
 903         if (!data)
 904                 return 0;
 905
 906         spin_lock_bh(&br->lock);
 907         ret = br_setport(br_port_get_rtnl(dev), data);
 908         spin_unlock_bh(&br->lock);
 909
 910         return ret;
 911 }
 912
 913 static int br_port_fill_slave_info(struct sk_buff *skb,
 914                                    const struct net_device *brdev,
 915                                    const struct net_device *dev)
 916 {
 917         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
 918 }
 919
 920 static size_t br_port_get_slave_size(const struct net_device *brdev,
 921                                      const struct net_device *dev)
 922 {
 923         return br_port_info_size();
 924 }
 925
 926 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
 927         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
 928         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
 929         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
 930         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
 931         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
 932         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
 933         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
 934         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
 935         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
 936         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
 937                                  .len  = ETH_ALEN },
 938         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
 939         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
 940         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
 941         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
 942         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
 943         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
 944         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
 945         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
 946         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
 947         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
 948         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
 949         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
 950         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
 951         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
 952         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
 953         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
 954         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
 955         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
 956         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
 957         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
 958         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
 959         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
 960 };
 961
 962 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
 963                          struct nlattr *data[])
 964 {
 965         struct net_bridge *br = netdev_priv(brdev);
 966         int err;
 967
 968         if (!data)
 969                 return 0;
 970
 971         if (data[IFLA_BR_FORWARD_DELAY]) {
 972                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
 973                 if (err)
 974                         return err;
 975         }
 976
 977         if (data[IFLA_BR_HELLO_TIME]) {
 978                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
 979                 if (err)
 980                         return err;
 981         }
 982
 983         if (data[IFLA_BR_MAX_AGE]) {
 984                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
 985                 if (err)
 986                         return err;
 987         }
 988
 989         if (data[IFLA_BR_AGEING_TIME]) {
 990                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
 991                 if (err)
 992                         return err;
 993         }
 994
 995         if (data[IFLA_BR_STP_STATE]) {
 996                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
 997
 998                 br_stp_set_enabled(br, stp_enabled);
 999         }
1000
1001         if (data[IFLA_BR_PRIORITY]) {
1002                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1003
1004                 br_stp_set_bridge_priority(br, priority);
1005         }
1006
1007         if (data[IFLA_BR_VLAN_FILTERING]) {
1008                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1009
1010                 err = __br_vlan_filter_toggle(br, vlan_filter);
1011                 if (err)
1012                         return err;
1013         }
1014
1015 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1016         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1017                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1018
1019                 err = __br_vlan_set_proto(br, vlan_proto);
1020                 if (err)
1021                         return err;
1022         }
1023
1024         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1025                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1026
1027                 err = __br_vlan_set_default_pvid(br, defpvid);
1028                 if (err)
1029                         return err;
1030         }
1031
1032         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1033                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1034
1035                 err = br_vlan_set_stats(br, vlan_stats);
1036                 if (err)
1037                         return err;
1038         }
1039 #endif
1040
1041         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1042                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1043
1044                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1045                         return -EINVAL;
1046                 br->group_fwd_mask = fwd_mask;
1047         }
1048
1049         if (data[IFLA_BR_GROUP_ADDR]) {
1050                 u8 new_addr[ETH_ALEN];
1051
1052                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1053                         return -EINVAL;
1054                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1055                 if (!is_link_local_ether_addr(new_addr))
1056                         return -EINVAL;
1057                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1058                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1059                     new_addr[5] == 3)           /* 802.1X PAE address */
1060                         return -EINVAL;
1061                 spin_lock_bh(&br->lock);
1062                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1063                 spin_unlock_bh(&br->lock);
1064                 br->group_addr_set = true;
1065                 br_recalculate_fwd_mask(br);
1066         }
1067
1068         if (data[IFLA_BR_FDB_FLUSH])
1069                 br_fdb_flush(br);
1070
1071 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1072         if (data[IFLA_BR_MCAST_ROUTER]) {
1073                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1074
1075                 err = br_multicast_set_router(br, multicast_router);
1076                 if (err)
1077                         return err;
1078         }
1079
1080         if (data[IFLA_BR_MCAST_SNOOPING]) {
1081                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1082
1083                 err = br_multicast_toggle(br, mcast_snooping);
1084                 if (err)
1085                         return err;
1086         }
1087
1088         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1089                 u8 val;
1090
1091                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1092                 br->multicast_query_use_ifaddr = !!val;
1093         }
1094
1095         if (data[IFLA_BR_MCAST_QUERIER]) {
1096                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1097
1098                 err = br_multicast_set_querier(br, mcast_querier);
1099                 if (err)
1100                         return err;
1101         }
1102
1103         if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
1104                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
1105
1106                 br->hash_elasticity = val;
1107         }
1108
1109         if (data[IFLA_BR_MCAST_HASH_MAX]) {
1110                 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1111
1112                 err = br_multicast_set_hash_max(br, hash_max);
1113                 if (err)
1114                         return err;
1115         }
1116
1117         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1118                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1119
1120                 br->multicast_last_member_count = val;
1121         }
1122
1123         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1124                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1125
1126                 br->multicast_startup_query_count = val;
1127         }
1128
1129         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1130                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1131
1132                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1133         }
1134
1135         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1136                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1137
1138                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1139         }
1140
1141         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1142                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1143
1144                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1145         }
1146
1147         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1148                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1149
1150                 br->multicast_query_interval = clock_t_to_jiffies(val);
1151         }
1152
1153         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1154                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1155
1156                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1157         }
1158
1159         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1160                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1161
1162                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1163         }
1164
1165         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1166                 __u8 mcast_stats;
1167
1168                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1169                 br->multicast_stats_enabled = !!mcast_stats;
1170         }
1171
1172         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1173                 __u8 igmp_version;
1174
1175                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1176                 err = br_multicast_set_igmp_version(br, igmp_version);
1177                 if (err)
1178                         return err;
1179         }
1180
1181 #if IS_ENABLED(CONFIG_IPV6)
1182         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1183                 __u8 mld_version;
1184
1185                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1186                 err = br_multicast_set_mld_version(br, mld_version);
1187                 if (err)
1188                         return err;
1189         }
1190 #endif
1191 #endif
1192 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1193         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1194                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1195
1196                 br->nf_call_iptables = val ? true : false;
1197         }
1198
1199         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1200                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1201
1202                 br->nf_call_ip6tables = val ? true : false;
1203         }
1204
1205         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1206                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1207
1208                 br->nf_call_arptables = val ? true : false;
1209         }
1210 #endif
1211
1212         return 0;
1213 }
1214
1215 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1216                           struct nlattr *tb[], struct nlattr *data[],
1217                           struct netlink_ext_ack *extack)
1218 {
1219         struct net_bridge *br = netdev_priv(dev);
1220         int err;
1221
1222         if (tb[IFLA_ADDRESS]) {
1223                 spin_lock_bh(&br->lock);
1224                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1225                 spin_unlock_bh(&br->lock);
1226         }
1227
1228         err = register_netdevice(dev);
1229         if (err)
1230                 return err;
1231
1232         err = br_changelink(dev, tb, data);
1233         if (err)
1234                 unregister_netdevice(dev);
1235         return err;
1236 }
1237
1238 static size_t br_get_size(const struct net_device *brdev)
1239 {
1240         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1241                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1242                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1243                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1244                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1245                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1246                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1247 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1248                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1249                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1250                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1251 #endif
1252                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1253                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1254                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1255                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1256                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1257                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1258                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1259                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1260                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1261                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1262                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1263                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1264 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1265                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1266                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1267                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1268                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1269                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1270                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1271                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1272                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1273                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1274                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1275                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1276                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1277                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1278                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1279                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1280                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1281                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1282 #endif
1283 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1284                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1285                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1286                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1287 #endif
1288                0;
1289 }
1290
1291 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1292 {
1293         struct net_bridge *br = netdev_priv(brdev);
1294         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1295         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1296         u32 age_time = jiffies_to_clock_t(br->max_age);
1297         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1298         u32 stp_enabled = br->stp_enabled;
1299         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1300         u8 vlan_enabled = br_vlan_enabled(br->dev);
1301         u64 clockval;
1302
1303         clockval = br_timer_value(&br->hello_timer);
1304         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1305                 return -EMSGSIZE;
1306         clockval = br_timer_value(&br->tcn_timer);
1307         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1308                 return -EMSGSIZE;
1309         clockval = br_timer_value(&br->topology_change_timer);
1310         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1311                               IFLA_BR_PAD))
1312                 return -EMSGSIZE;
1313         clockval = br_timer_value(&br->gc_work.timer);
1314         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1315                 return -EMSGSIZE;
1316
1317         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1318             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1319             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1320             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1321             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1322             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1323             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1324             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1325             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1326                     &br->bridge_id) ||
1327             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1328                     &br->designated_root) ||
1329             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1330             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1331             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1332             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1333                        br->topology_change_detected) ||
1334             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1335                 return -EMSGSIZE;
1336
1337 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1338         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1339             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1340             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled))
1341                 return -EMSGSIZE;
1342 #endif
1343 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1344         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1345             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1346             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1347                        br->multicast_query_use_ifaddr) ||
1348             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1349             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1350                        br->multicast_stats_enabled) ||
1351             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1352                         br->hash_elasticity) ||
1353             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1354             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1355                         br->multicast_last_member_count) ||
1356             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1357                         br->multicast_startup_query_count) ||
1358             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1359                        br->multicast_igmp_version))
1360                 return -EMSGSIZE;
1361 #if IS_ENABLED(CONFIG_IPV6)
1362         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1363                        br->multicast_mld_version))
1364                 return -EMSGSIZE;
1365 #endif
1366         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1367         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1368                               IFLA_BR_PAD))
1369                 return -EMSGSIZE;
1370         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1371         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1372                               IFLA_BR_PAD))
1373                 return -EMSGSIZE;
1374         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1375         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1376                               IFLA_BR_PAD))
1377                 return -EMSGSIZE;
1378         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1379         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1380                               IFLA_BR_PAD))
1381                 return -EMSGSIZE;
1382         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1383         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1384                               IFLA_BR_PAD))
1385                 return -EMSGSIZE;
1386         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1387         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1388                               IFLA_BR_PAD))
1389                 return -EMSGSIZE;
1390 #endif
1391 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1392         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1393                        br->nf_call_iptables ? 1 : 0) ||
1394             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1395                        br->nf_call_ip6tables ? 1 : 0) ||
1396             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1397                        br->nf_call_arptables ? 1 : 0))
1398                 return -EMSGSIZE;
1399 #endif
1400
1401         return 0;
1402 }
1403
1404 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1405 {
1406         struct net_bridge_port *p = NULL;
1407         struct net_bridge_vlan_group *vg;
1408         struct net_bridge_vlan *v;
1409         struct net_bridge *br;
1410         int numvls = 0;
1411
1412         switch (attr) {
1413         case IFLA_STATS_LINK_XSTATS:
1414                 br = netdev_priv(dev);
1415                 vg = br_vlan_group(br);
1416                 break;
1417         case IFLA_STATS_LINK_XSTATS_SLAVE:
1418                 p = br_port_get_rtnl(dev);
1419                 if (!p)
1420                         return 0;
1421                 br = p->br;
1422                 vg = nbp_vlan_group(p);
1423                 break;
1424         default:
1425                 return 0;
1426         }
1427
1428         if (vg) {
1429                 /* we need to count all, even placeholder entries */
1430                 list_for_each_entry(v, &vg->vlan_list, vlist)
1431                         numvls++;
1432         }
1433
1434         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1435                nla_total_size(sizeof(struct br_mcast_stats)) +
1436                nla_total_size(0);
1437 }
1438
1439 static int br_fill_linkxstats(struct sk_buff *skb,
1440                               const struct net_device *dev,
1441                               int *prividx, int attr)
1442 {
1443         struct nlattr *nla __maybe_unused;
1444         struct net_bridge_port *p = NULL;
1445         struct net_bridge_vlan_group *vg;
1446         struct net_bridge_vlan *v;
1447         struct net_bridge *br;
1448         struct nlattr *nest;
1449         int vl_idx = 0;
1450
1451         switch (attr) {
1452         case IFLA_STATS_LINK_XSTATS:
1453                 br = netdev_priv(dev);
1454                 vg = br_vlan_group(br);
1455                 break;
1456         case IFLA_STATS_LINK_XSTATS_SLAVE:
1457                 p = br_port_get_rtnl(dev);
1458                 if (!p)
1459                         return 0;
1460                 br = p->br;
1461                 vg = nbp_vlan_group(p);
1462                 break;
1463         default:
1464                 return -EINVAL;
1465         }
1466
1467         nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE);
1468         if (!nest)
1469                 return -EMSGSIZE;
1470
1471         if (vg) {
1472                 u16 pvid;
1473
1474                 pvid = br_get_pvid(vg);
1475                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1476                         struct bridge_vlan_xstats vxi;
1477                         struct br_vlan_stats stats;
1478
1479                         if (++vl_idx < *prividx)
1480                                 continue;
1481                         memset(&vxi, 0, sizeof(vxi));
1482                         vxi.vid = v->vid;
1483                         vxi.flags = v->flags;
1484                         if (v->vid == pvid)
1485                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1486                         br_vlan_get_stats(v, &stats);
1487                         vxi.rx_bytes = stats.rx_bytes;
1488                         vxi.rx_packets = stats.rx_packets;
1489                         vxi.tx_bytes = stats.tx_bytes;
1490                         vxi.tx_packets = stats.tx_packets;
1491
1492                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1493                                 goto nla_put_failure;
1494                 }
1495         }
1496
1497 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1498         if (++vl_idx >= *prividx) {
1499                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1500                                         sizeof(struct br_mcast_stats),
1501                                         BRIDGE_XSTATS_PAD);
1502                 if (!nla)
1503                         goto nla_put_failure;
1504                 br_multicast_get_stats(br, p, nla_data(nla));
1505         }
1506 #endif
1507         nla_nest_end(skb, nest);
1508         *prividx = 0;
1509
1510         return 0;
1511
1512 nla_put_failure:
1513         nla_nest_end(skb, nest);
1514         *prividx = vl_idx;
1515
1516         return -EMSGSIZE;
1517 }
1518
1519 static struct rtnl_af_ops br_af_ops __read_mostly = {
1520         .family                 = AF_BRIDGE,
1521         .get_link_af_size       = br_get_link_af_size_filtered,
1522 };
1523
1524 struct rtnl_link_ops br_link_ops __read_mostly = {
1525         .kind                   = "bridge",
1526         .priv_size              = sizeof(struct net_bridge),
1527         .setup                  = br_dev_setup,
1528         .maxtype                = IFLA_BR_MAX,
1529         .policy                 = br_policy,
1530         .validate               = br_validate,
1531         .newlink                = br_dev_newlink,
1532         .changelink             = br_changelink,
1533         .dellink                = br_dev_delete,
1534         .get_size               = br_get_size,
1535         .fill_info              = br_fill_info,
1536         .fill_linkxstats        = br_fill_linkxstats,
1537         .get_linkxstats_size    = br_get_linkxstats_size,
1538
1539         .slave_maxtype          = IFLA_BRPORT_MAX,
1540         .slave_policy           = br_port_policy,
1541         .slave_changelink       = br_port_slave_changelink,
1542         .get_slave_size         = br_port_get_slave_size,
1543         .fill_slave_info        = br_port_fill_slave_info,
1544 };
1545
1546 int __init br_netlink_init(void)
1547 {
1548         int err;
1549
1550         br_mdb_init();
1551         rtnl_af_register(&br_af_ops);
1552
1553         err = rtnl_link_register(&br_link_ops);
1554         if (err)
1555                 goto out_af;
1556
1557         return 0;
1558
1559 out_af:
1560         rtnl_af_unregister(&br_af_ops);
1561         br_mdb_uninit();
1562         return err;
1563 }
1564
1565 void br_netlink_fini(void)
1566 {
1567         br_mdb_uninit();
1568         rtnl_af_unregister(&br_af_ops);
1569         rtnl_link_unregister(&br_link_ops);
1570 }