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(1)     /* IFLA_BRPORT_NEIGH_SUPPRESS */
 142                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
 143                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
 144                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_PORT */
 145                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_COST */
 146                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_ID */
 147                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_NO */
 148                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
 149                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_CONFIG_PENDING */
 150                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
 151                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
 152                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
 153 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 154                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MULTICAST_ROUTER */
 155 #endif
 156                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_GROUP_FWD_MASK */
 157                 + 0;
 158 }
 159
 160 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
 161 {
 162         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
 163                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
 164                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
 165                 + nla_total_size(4) /* IFLA_MASTER */
 166                 + nla_total_size(4) /* IFLA_MTU */
 167                 + nla_total_size(4) /* IFLA_LINK */
 168                 + nla_total_size(1) /* IFLA_OPERSTATE */
 169                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
 170                 + nla_total_size(br_get_link_af_size_filtered(dev,
 171                                  filter_mask)); /* IFLA_AF_SPEC */
 172 }
 173
 174 static int br_port_fill_attrs(struct sk_buff *skb,
 175                               const struct net_bridge_port *p)
 176 {
 177         u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
 178         u64 timerval;
 179
 180         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
 181             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
 182             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
 183             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
 184             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
 185             nla_put_u8(skb, IFLA_BRPORT_PROTECT,
 186                        !!(p->flags & BR_ROOT_BLOCK)) ||
 187             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
 188                        !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
 189             nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
 190                        !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
 191             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
 192             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
 193                        !!(p->flags & BR_FLOOD)) ||
 194             nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
 195                        !!(p->flags & BR_MCAST_FLOOD)) ||
 196             nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
 197                        !!(p->flags & BR_BCAST_FLOOD)) ||
 198             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
 199             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
 200                        !!(p->flags & BR_PROXYARP_WIFI)) ||
 201             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
 202                     &p->designated_root) ||
 203             nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
 204                     &p->designated_bridge) ||
 205             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
 206             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
 207             nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
 208             nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
 209             nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
 210                        p->topology_change_ack) ||
 211             nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
 212             nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
 213                                                         BR_VLAN_TUNNEL)) ||
 214             nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
 215             nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
 216                        !!(p->flags & BR_NEIGH_SUPPRESS)))
 217                 return -EMSGSIZE;
 218
 219         timerval = br_timer_value(&p->message_age_timer);
 220         if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
 221                               IFLA_BRPORT_PAD))
 222                 return -EMSGSIZE;
 223         timerval = br_timer_value(&p->forward_delay_timer);
 224         if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
 225                               IFLA_BRPORT_PAD))
 226                 return -EMSGSIZE;
 227         timerval = br_timer_value(&p->hold_timer);
 228         if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
 229                               IFLA_BRPORT_PAD))
 230                 return -EMSGSIZE;
 231
 232 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 233         if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
 234                        p->multicast_router))
 235                 return -EMSGSIZE;
 236 #endif
 237
 238         return 0;
 239 }
 240
 241 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
 242                                     u16 vid_end, u16 flags)
 243 {
 244         struct  bridge_vlan_info vinfo;
 245
 246         if ((vid_end - vid_start) > 0) {
 247                 /* add range to skb */
 248                 vinfo.vid = vid_start;
 249                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
 250                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 251                             sizeof(vinfo), &vinfo))
 252                         goto nla_put_failure;
 253
 254                 vinfo.vid = vid_end;
 255                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
 256                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 257                             sizeof(vinfo), &vinfo))
 258                         goto nla_put_failure;
 259         } else {
 260                 vinfo.vid = vid_start;
 261                 vinfo.flags = flags;
 262                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 263                             sizeof(vinfo), &vinfo))
 264                         goto nla_put_failure;
 265         }
 266
 267         return 0;
 268
 269 nla_put_failure:
 270         return -EMSGSIZE;
 271 }
 272
 273 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
 274                                          struct net_bridge_vlan_group *vg)
 275 {
 276         struct net_bridge_vlan *v;
 277         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 278         u16 flags, pvid;
 279         int err = 0;
 280
 281         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
 282          * and mark vlan info with begin and end flags
 283          * if vlaninfo represents a range
 284          */
 285         pvid = br_get_pvid(vg);
 286         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 287                 flags = 0;
 288                 if (!br_vlan_should_use(v))
 289                         continue;
 290                 if (v->vid == pvid)
 291                         flags |= BRIDGE_VLAN_INFO_PVID;
 292
 293                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 294                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 295
 296                 if (vid_range_start == 0) {
 297                         goto initvars;
 298                 } else if ((v->vid - vid_range_end) == 1 &&
 299                         flags == vid_range_flags) {
 300                         vid_range_end = v->vid;
 301                         continue;
 302                 } else {
 303                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 304                                                        vid_range_end,
 305                                                        vid_range_flags);
 306                         if (err)
 307                                 return err;
 308                 }
 309
 310 initvars:
 311                 vid_range_start = v->vid;
 312                 vid_range_end = v->vid;
 313                 vid_range_flags = flags;
 314         }
 315
 316         if (vid_range_start != 0) {
 317                 /* Call it once more to send any left over vlans */
 318                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 319                                                vid_range_end,
 320                                                vid_range_flags);
 321                 if (err)
 322                         return err;
 323         }
 324
 325         return 0;
 326 }
 327
 328 static int br_fill_ifvlaninfo(struct sk_buff *skb,
 329                               struct net_bridge_vlan_group *vg)
 330 {
 331         struct bridge_vlan_info vinfo;
 332         struct net_bridge_vlan *v;
 333         u16 pvid;
 334
 335         pvid = br_get_pvid(vg);
 336         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 337                 if (!br_vlan_should_use(v))
 338                         continue;
 339
 340                 vinfo.vid = v->vid;
 341                 vinfo.flags = 0;
 342                 if (v->vid == pvid)
 343                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
 344
 345                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 346                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 347
 348                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 349                             sizeof(vinfo), &vinfo))
 350                         goto nla_put_failure;
 351         }
 352
 353         return 0;
 354
 355 nla_put_failure:
 356         return -EMSGSIZE;
 357 }
 358
 359 /*
 360  * Create one netlink message for one interface
 361  * Contains port and master info as well as carrier and bridge state.
 362  */
 363 static int br_fill_ifinfo(struct sk_buff *skb,
 364                           struct net_bridge_port *port,
 365                           u32 pid, u32 seq, int event, unsigned int flags,
 366                           u32 filter_mask, const struct net_device *dev)
 367 {
 368         struct net_bridge *br;
 369         struct ifinfomsg *hdr;
 370         struct nlmsghdr *nlh;
 371         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
 372
 373         if (port)
 374                 br = port->br;
 375         else
 376                 br = netdev_priv(dev);
 377
 378         br_debug(br, "br_fill_info event %d port %s master %s\n",
 379                      event, dev->name, br->dev->name);
 380
 381         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
 382         if (nlh == NULL)
 383                 return -EMSGSIZE;
 384
 385         hdr = nlmsg_data(nlh);
 386         hdr->ifi_family = AF_BRIDGE;
 387         hdr->__ifi_pad = 0;
 388         hdr->ifi_type = dev->type;
 389         hdr->ifi_index = dev->ifindex;
 390         hdr->ifi_flags = dev_get_flags(dev);
 391         hdr->ifi_change = 0;
 392
 393         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
 394             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
 395             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
 396             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
 397             (dev->addr_len &&
 398              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
 399             (dev->ifindex != dev_get_iflink(dev) &&
 400              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
 401                 goto nla_put_failure;
 402
 403         if (event == RTM_NEWLINK && port) {
 404                 struct nlattr *nest
 405                         = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
 406
 407                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 408                         goto nla_put_failure;
 409                 nla_nest_end(skb, nest);
 410         }
 411
 412         /* Check if  the VID information is requested */
 413         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
 414             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
 415                 struct net_bridge_vlan_group *vg;
 416                 struct nlattr *af;
 417                 int err;
 418
 419                 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
 420                 rcu_read_lock();
 421                 if (port)
 422                         vg = nbp_vlan_group_rcu(port);
 423                 else
 424                         vg = br_vlan_group_rcu(br);
 425
 426                 if (!vg || !vg->num_vlans) {
 427                         rcu_read_unlock();
 428                         goto done;
 429                 }
 430                 af = nla_nest_start(skb, IFLA_AF_SPEC);
 431                 if (!af) {
 432                         rcu_read_unlock();
 433                         goto nla_put_failure;
 434                 }
 435                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 436                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 437                 else
 438                         err = br_fill_ifvlaninfo(skb, vg);
 439
 440                 if (port && (port->flags & BR_VLAN_TUNNEL))
 441                         err = br_fill_vlan_tunnel_info(skb, vg);
 442                 rcu_read_unlock();
 443                 if (err)
 444                         goto nla_put_failure;
 445                 nla_nest_end(skb, af);
 446         }
 447
 448 done:
 449         nlmsg_end(skb, nlh);
 450         return 0;
 451
 452 nla_put_failure:
 453         nlmsg_cancel(skb, nlh);
 454         return -EMSGSIZE;
 455 }
 456
 457 /*
 458  * Notify listeners of a change in port information
 459  */
 460 void br_ifinfo_notify(int event, struct net_bridge_port *port)
 461 {
 462         struct net *net;
 463         struct sk_buff *skb;
 464         int err = -ENOBUFS;
 465         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 466
 467         if (!port)
 468                 return;
 469
 470         net = dev_net(port->dev);
 471         br_debug(port->br, "port %u(%s) event %d\n",
 472                  (unsigned int)port->port_no, port->dev->name, event);
 473
 474         skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
 475         if (skb == NULL)
 476                 goto errout;
 477
 478         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
 479         if (err < 0) {
 480                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 481                 WARN_ON(err == -EMSGSIZE);
 482                 kfree_skb(skb);
 483                 goto errout;
 484         }
 485         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 486         return;
 487 errout:
 488         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 489 }
 490
 491
 492 /*
 493  * Dump information about all ports, in response to GETLINK
 494  */
 495 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 496                struct net_device *dev, u32 filter_mask, int nlflags)
 497 {
 498         struct net_bridge_port *port = br_port_get_rtnl(dev);
 499
 500         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 501             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
 502                 return 0;
 503
 504         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 505                               filter_mask, dev);
 506 }
 507
 508 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 509                         int cmd, struct bridge_vlan_info *vinfo, bool *changed)
 510 {
 511         int err = 0;
 512
 513         switch (cmd) {
 514         case RTM_SETLINK:
 515                 if (p) {
 516                         /* if the MASTER flag is set this will act on the global
 517                          * per-VLAN entry as well
 518                          */
 519                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
 520                 } else {
 521                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 522                         err = br_vlan_add(br, vinfo->vid, vinfo->flags);
 523                 }
 524                 if (!err)
 525                         *changed = true;
 526                 break;
 527
 528         case RTM_DELLINK:
 529                 if (p) {
 530                         if (!nbp_vlan_delete(p, vinfo->vid))
 531                                 *changed = true;
 532
 533                         if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
 534                             !br_vlan_delete(p->br, vinfo->vid))
 535                                 *changed = true;
 536                 } else if (!br_vlan_delete(br, vinfo->vid)) {
 537                         *changed = true;
 538                 }
 539                 break;
 540         }
 541
 542         return err;
 543 }
 544
 545 static int br_process_vlan_info(struct net_bridge *br,
 546                                 struct net_bridge_port *p, int cmd,
 547                                 struct bridge_vlan_info *vinfo_curr,
 548                                 struct bridge_vlan_info **vinfo_last,
 549                                 bool *changed)
 550 {
 551         if (!vinfo_curr->vid || vinfo_curr->vid >= VLAN_VID_MASK)
 552                 return -EINVAL;
 553
 554         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 555                 /* check if we are already processing a range */
 556                 if (*vinfo_last)
 557                         return -EINVAL;
 558                 *vinfo_last = vinfo_curr;
 559                 /* don't allow range of pvids */
 560                 if ((*vinfo_last)->flags & BRIDGE_VLAN_INFO_PVID)
 561                         return -EINVAL;
 562                 return 0;
 563         }
 564
 565         if (*vinfo_last) {
 566                 struct bridge_vlan_info tmp_vinfo;
 567                 int v, err;
 568
 569                 if (!(vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END))
 570                         return -EINVAL;
 571
 572                 if (vinfo_curr->vid <= (*vinfo_last)->vid)
 573                         return -EINVAL;
 574
 575                 memcpy(&tmp_vinfo, *vinfo_last,
 576                        sizeof(struct bridge_vlan_info));
 577                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
 578                         tmp_vinfo.vid = v;
 579                         err = br_vlan_info(br, p, cmd, &tmp_vinfo, changed);
 580                         if (err)
 581                                 break;
 582                 }
 583                 *vinfo_last = NULL;
 584
 585                 return err;
 586         }
 587
 588         return br_vlan_info(br, p, cmd, vinfo_curr, changed);
 589 }
 590
 591 static int br_afspec(struct net_bridge *br,
 592                      struct net_bridge_port *p,
 593                      struct nlattr *af_spec,
 594                      int cmd, bool *changed)
 595 {
 596         struct bridge_vlan_info *vinfo_curr = NULL;
 597         struct bridge_vlan_info *vinfo_last = NULL;
 598         struct nlattr *attr;
 599         struct vtunnel_info tinfo_last = {};
 600         struct vtunnel_info tinfo_curr = {};
 601         int err = 0, rem;
 602
 603         nla_for_each_nested(attr, af_spec, rem) {
 604                 err = 0;
 605                 switch (nla_type(attr)) {
 606                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
 607                         if (!p || !(p->flags & BR_VLAN_TUNNEL))
 608                                 return -EINVAL;
 609                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
 610                         if (err)
 611                                 return err;
 612                         err = br_process_vlan_tunnel_info(br, p, cmd,
 613                                                           &tinfo_curr,
 614                                                           &tinfo_last,
 615                                                           changed);
 616                         if (err)
 617                                 return err;
 618                         break;
 619                 case IFLA_BRIDGE_VLAN_INFO:
 620                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 621                                 return -EINVAL;
 622                         vinfo_curr = nla_data(attr);
 623                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
 624                                                    &vinfo_last, changed);
 625                         if (err)
 626                                 return err;
 627                         break;
 628                 }
 629         }
 630
 631         return err;
 632 }
 633
 634 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 635         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 636         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 637         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 638         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 639         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 640         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 641         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 642         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 643         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 644         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 645         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 646         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 647         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
 648         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
 649         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
 650         [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
 651 };
 652
 653 /* Change the state of the port and notify spanning tree */
 654 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 655 {
 656         if (state > BR_STATE_BLOCKING)
 657                 return -EINVAL;
 658
 659         /* if kernel STP is running, don't allow changes */
 660         if (p->br->stp_enabled == BR_KERNEL_STP)
 661                 return -EBUSY;
 662
 663         /* if device is not up, change is not allowed
 664          * if link is not present, only allowable state is disabled
 665          */
 666         if (!netif_running(p->dev) ||
 667             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 668                 return -ENETDOWN;
 669
 670         br_set_state(p, state);
 671         br_port_state_selection(p->br);
 672         return 0;
 673 }
 674
 675 /* Set/clear or port flags based on attribute */
 676 static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 677                             int attrtype, unsigned long mask)
 678 {
 679         unsigned long flags;
 680         int err;
 681
 682         if (!tb[attrtype])
 683                 return 0;
 684
 685         if (nla_get_u8(tb[attrtype]))
 686                 flags = p->flags | mask;
 687         else
 688                 flags = p->flags & ~mask;
 689
 690         err = br_switchdev_set_port_flag(p, flags, mask);
 691         if (err)
 692                 return err;
 693
 694         p->flags = flags;
 695         return 0;
 696 }
 697
 698 /* Process bridge protocol info on port */
 699 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 700 {
 701         unsigned long old_flags = p->flags;
 702         bool br_vlan_tunnel_old = false;
 703         int err;
 704
 705         err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 706         if (err)
 707                 return err;
 708
 709         err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 710         if (err)
 711                 return err;
 712
 713         err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 714         if (err)
 715                 return err;
 716
 717         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 718         if (err)
 719                 return err;
 720
 721         err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 722         if (err)
 723                 return err;
 724
 725         err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 726         if (err)
 727                 return err;
 728
 729         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
 730         if (err)
 731                 return err;
 732
 733         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
 734         if (err)
 735                 return err;
 736
 737         err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
 738         if (err)
 739                 return err;
 740
 741         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 742         if (err)
 743                 return err;
 744
 745         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 746         if (err)
 747                 return err;
 748
 749         br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
 750         err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
 751         if (err)
 752                 return err;
 753
 754         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
 755                 nbp_vlan_tunnel_info_flush(p);
 756
 757         if (tb[IFLA_BRPORT_COST]) {
 758                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 759                 if (err)
 760                         return err;
 761         }
 762
 763         if (tb[IFLA_BRPORT_PRIORITY]) {
 764                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 765                 if (err)
 766                         return err;
 767         }
 768
 769         if (tb[IFLA_BRPORT_STATE]) {
 770                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 771                 if (err)
 772                         return err;
 773         }
 774
 775         if (tb[IFLA_BRPORT_FLUSH])
 776                 br_fdb_delete_by_port(p->br, p, 0, 0);
 777
 778 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 779         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 780                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 781
 782                 err = br_multicast_set_port_router(p, mcast_router);
 783                 if (err)
 784                         return err;
 785         }
 786 #endif
 787
 788         if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
 789                 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
 790
 791                 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
 792                         return -EINVAL;
 793                 p->group_fwd_mask = fwd_mask;
 794         }
 795
 796         err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
 797                                BR_NEIGH_SUPPRESS);
 798         if (err)
 799                 return err;
 800
 801         br_port_flags_change(p, old_flags ^ p->flags);
 802         return 0;
 803 }
 804
 805 /* Change state and parameters on port. */
 806 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 807 {
 808         struct nlattr *protinfo;
 809         struct nlattr *afspec;
 810         struct net_bridge_port *p;
 811         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 812         bool changed = false;
 813         int err = 0;
 814
 815         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 816         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 817         if (!protinfo && !afspec)
 818                 return 0;
 819
 820         p = br_port_get_rtnl(dev);
 821         /* We want to accept dev as bridge itself if the AF_SPEC
 822          * is set to see if someone is setting vlan info on the bridge
 823          */
 824         if (!p && !afspec)
 825                 return -EINVAL;
 826
 827         if (p && protinfo) {
 828                 if (protinfo->nla_type & NLA_F_NESTED) {
 829                         err = nla_parse_nested(tb, IFLA_BRPORT_MAX, protinfo,
 830                                                br_port_policy, NULL);
 831                         if (err)
 832                                 return err;
 833
 834                         spin_lock_bh(&p->br->lock);
 835                         err = br_setport(p, tb);
 836                         spin_unlock_bh(&p->br->lock);
 837                 } else {
 838                         /* Binary compatibility with old RSTP */
 839                         if (nla_len(protinfo) < sizeof(u8))
 840                                 return -EINVAL;
 841
 842                         spin_lock_bh(&p->br->lock);
 843                         err = br_set_port_state(p, nla_get_u8(protinfo));
 844                         spin_unlock_bh(&p->br->lock);
 845                 }
 846                 if (err)
 847                         goto out;
 848                 changed = true;
 849         }
 850
 851         if (afspec) {
 852                 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 853                                 afspec, RTM_SETLINK, &changed);
 854         }
 855
 856         if (changed)
 857                 br_ifinfo_notify(RTM_NEWLINK, p);
 858 out:
 859         return err;
 860 }
 861
 862 /* Delete port information */
 863 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 864 {
 865         struct nlattr *afspec;
 866         struct net_bridge_port *p;
 867         bool changed = false;
 868         int err = 0;
 869
 870         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 871         if (!afspec)
 872                 return 0;
 873
 874         p = br_port_get_rtnl(dev);
 875         /* We want to accept dev as bridge itself as well */
 876         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
 877                 return -EINVAL;
 878
 879         err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 880                         afspec, RTM_DELLINK, &changed);
 881         if (changed)
 882                 /* Send RTM_NEWLINK because userspace
 883                  * expects RTM_NEWLINK for vlan dels
 884                  */
 885                 br_ifinfo_notify(RTM_NEWLINK, p);
 886
 887         return err;
 888 }
 889
 890 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
 891                        struct netlink_ext_ack *extack)
 892 {
 893         if (tb[IFLA_ADDRESS]) {
 894                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 895                         return -EINVAL;
 896                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 897                         return -EADDRNOTAVAIL;
 898         }
 899
 900         if (!data)
 901                 return 0;
 902
 903 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 904         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 905                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
 906                 case htons(ETH_P_8021Q):
 907                 case htons(ETH_P_8021AD):
 908                         break;
 909                 default:
 910                         return -EPROTONOSUPPORT;
 911                 }
 912         }
 913
 914         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 915                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 916
 917                 if (defpvid >= VLAN_VID_MASK)
 918                         return -EINVAL;
 919         }
 920 #endif
 921
 922         return 0;
 923 }
 924
 925 static int br_port_slave_changelink(struct net_device *brdev,
 926                                     struct net_device *dev,
 927                                     struct nlattr *tb[],
 928                                     struct nlattr *data[],
 929                                     struct netlink_ext_ack *extack)
 930 {
 931         struct net_bridge *br = netdev_priv(brdev);
 932         int ret;
 933
 934         if (!data)
 935                 return 0;
 936
 937         spin_lock_bh(&br->lock);
 938         ret = br_setport(br_port_get_rtnl(dev), data);
 939         spin_unlock_bh(&br->lock);
 940
 941         return ret;
 942 }
 943
 944 static int br_port_fill_slave_info(struct sk_buff *skb,
 945                                    const struct net_device *brdev,
 946                                    const struct net_device *dev)
 947 {
 948         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
 949 }
 950
 951 static size_t br_port_get_slave_size(const struct net_device *brdev,
 952                                      const struct net_device *dev)
 953 {
 954         return br_port_info_size();
 955 }
 956
 957 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
 958         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
 959         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
 960         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
 961         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
 962         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
 963         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
 964         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
 965         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
 966         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
 967         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
 968                                  .len  = ETH_ALEN },
 969         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
 970         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
 971         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
 972         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
 973         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
 974         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
 975         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
 976         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
 977         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
 978         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
 979         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
 980         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
 981         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
 982         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
 983         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
 984         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
 985         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
 986         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
 987         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
 988         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
 989         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
 990         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
 991 };
 992
 993 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
 994                          struct nlattr *data[],
 995                          struct netlink_ext_ack *extack)
 996 {
 997         struct net_bridge *br = netdev_priv(brdev);
 998         int err;
 999
1000         if (!data)
1001                 return 0;
1002
1003         if (data[IFLA_BR_FORWARD_DELAY]) {
1004                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1005                 if (err)
1006                         return err;
1007         }
1008
1009         if (data[IFLA_BR_HELLO_TIME]) {
1010                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1011                 if (err)
1012                         return err;
1013         }
1014
1015         if (data[IFLA_BR_MAX_AGE]) {
1016                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1017                 if (err)
1018                         return err;
1019         }
1020
1021         if (data[IFLA_BR_AGEING_TIME]) {
1022                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1023                 if (err)
1024                         return err;
1025         }
1026
1027         if (data[IFLA_BR_STP_STATE]) {
1028                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1029
1030                 br_stp_set_enabled(br, stp_enabled);
1031         }
1032
1033         if (data[IFLA_BR_PRIORITY]) {
1034                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1035
1036                 br_stp_set_bridge_priority(br, priority);
1037         }
1038
1039         if (data[IFLA_BR_VLAN_FILTERING]) {
1040                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1041
1042                 err = __br_vlan_filter_toggle(br, vlan_filter);
1043                 if (err)
1044                         return err;
1045         }
1046
1047 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1048         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1049                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1050
1051                 err = __br_vlan_set_proto(br, vlan_proto);
1052                 if (err)
1053                         return err;
1054         }
1055
1056         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1057                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1058
1059                 err = __br_vlan_set_default_pvid(br, defpvid);
1060                 if (err)
1061                         return err;
1062         }
1063
1064         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1065                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1066
1067                 err = br_vlan_set_stats(br, vlan_stats);
1068                 if (err)
1069                         return err;
1070         }
1071 #endif
1072
1073         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1074                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1075
1076                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1077                         return -EINVAL;
1078                 br->group_fwd_mask = fwd_mask;
1079         }
1080
1081         if (data[IFLA_BR_GROUP_ADDR]) {
1082                 u8 new_addr[ETH_ALEN];
1083
1084                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1085                         return -EINVAL;
1086                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1087                 if (!is_link_local_ether_addr(new_addr))
1088                         return -EINVAL;
1089                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1090                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1091                     new_addr[5] == 3)           /* 802.1X PAE address */
1092                         return -EINVAL;
1093                 spin_lock_bh(&br->lock);
1094                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1095                 spin_unlock_bh(&br->lock);
1096                 br->group_addr_set = true;
1097                 br_recalculate_fwd_mask(br);
1098         }
1099
1100         if (data[IFLA_BR_FDB_FLUSH])
1101                 br_fdb_flush(br);
1102
1103 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1104         if (data[IFLA_BR_MCAST_ROUTER]) {
1105                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1106
1107                 err = br_multicast_set_router(br, multicast_router);
1108                 if (err)
1109                         return err;
1110         }
1111
1112         if (data[IFLA_BR_MCAST_SNOOPING]) {
1113                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1114
1115                 err = br_multicast_toggle(br, mcast_snooping);
1116                 if (err)
1117                         return err;
1118         }
1119
1120         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1121                 u8 val;
1122
1123                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1124                 br->multicast_query_use_ifaddr = !!val;
1125         }
1126
1127         if (data[IFLA_BR_MCAST_QUERIER]) {
1128                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1129
1130                 err = br_multicast_set_querier(br, mcast_querier);
1131                 if (err)
1132                         return err;
1133         }
1134
1135         if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
1136                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
1137
1138                 br->hash_elasticity = val;
1139         }
1140
1141         if (data[IFLA_BR_MCAST_HASH_MAX]) {
1142                 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1143
1144                 err = br_multicast_set_hash_max(br, hash_max);
1145                 if (err)
1146                         return err;
1147         }
1148
1149         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1150                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1151
1152                 br->multicast_last_member_count = val;
1153         }
1154
1155         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1156                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1157
1158                 br->multicast_startup_query_count = val;
1159         }
1160
1161         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1162                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1163
1164                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1165         }
1166
1167         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1168                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1169
1170                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1171         }
1172
1173         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1174                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1175
1176                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1177         }
1178
1179         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1180                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1181
1182                 br->multicast_query_interval = clock_t_to_jiffies(val);
1183         }
1184
1185         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1186                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1187
1188                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1189         }
1190
1191         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1192                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1193
1194                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1195         }
1196
1197         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1198                 __u8 mcast_stats;
1199
1200                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1201                 br->multicast_stats_enabled = !!mcast_stats;
1202         }
1203
1204         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1205                 __u8 igmp_version;
1206
1207                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1208                 err = br_multicast_set_igmp_version(br, igmp_version);
1209                 if (err)
1210                         return err;
1211         }
1212
1213 #if IS_ENABLED(CONFIG_IPV6)
1214         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1215                 __u8 mld_version;
1216
1217                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1218                 err = br_multicast_set_mld_version(br, mld_version);
1219                 if (err)
1220                         return err;
1221         }
1222 #endif
1223 #endif
1224 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1225         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1226                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1227
1228                 br->nf_call_iptables = val ? true : false;
1229         }
1230
1231         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1232                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1233
1234                 br->nf_call_ip6tables = val ? true : false;
1235         }
1236
1237         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1238                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1239
1240                 br->nf_call_arptables = val ? true : false;
1241         }
1242 #endif
1243
1244         return 0;
1245 }
1246
1247 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1248                           struct nlattr *tb[], struct nlattr *data[],
1249                           struct netlink_ext_ack *extack)
1250 {
1251         struct net_bridge *br = netdev_priv(dev);
1252         int err;
1253
1254         if (tb[IFLA_ADDRESS]) {
1255                 spin_lock_bh(&br->lock);
1256                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1257                 spin_unlock_bh(&br->lock);
1258         }
1259
1260         err = register_netdevice(dev);
1261         if (err)
1262                 return err;
1263
1264         err = br_changelink(dev, tb, data, extack);
1265         if (err)
1266                 unregister_netdevice(dev);
1267         return err;
1268 }
1269
1270 static size_t br_get_size(const struct net_device *brdev)
1271 {
1272         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1273                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1274                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1275                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1276                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1277                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1278                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1279 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1280                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1281                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1282                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1283 #endif
1284                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1285                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1286                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1287                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1288                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1289                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1290                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1291                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1292                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1293                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1294                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1295                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1296 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1297                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1298                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1299                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1300                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1301                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1302                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1303                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1304                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1305                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1306                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1307                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1308                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1309                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1310                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1311                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1312                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1313                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1314 #endif
1315 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1316                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1317                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1318                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1319 #endif
1320                0;
1321 }
1322
1323 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1324 {
1325         struct net_bridge *br = netdev_priv(brdev);
1326         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1327         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1328         u32 age_time = jiffies_to_clock_t(br->max_age);
1329         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1330         u32 stp_enabled = br->stp_enabled;
1331         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1332         u8 vlan_enabled = br_vlan_enabled(br->dev);
1333         u64 clockval;
1334
1335         clockval = br_timer_value(&br->hello_timer);
1336         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1337                 return -EMSGSIZE;
1338         clockval = br_timer_value(&br->tcn_timer);
1339         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1340                 return -EMSGSIZE;
1341         clockval = br_timer_value(&br->topology_change_timer);
1342         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1343                               IFLA_BR_PAD))
1344                 return -EMSGSIZE;
1345         clockval = br_timer_value(&br->gc_work.timer);
1346         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1347                 return -EMSGSIZE;
1348
1349         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1350             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1351             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1352             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1353             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1354             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1355             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1356             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1357             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1358                     &br->bridge_id) ||
1359             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1360                     &br->designated_root) ||
1361             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1362             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1363             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1364             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1365                        br->topology_change_detected) ||
1366             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1367                 return -EMSGSIZE;
1368
1369 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1370         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1371             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1372             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled))
1373                 return -EMSGSIZE;
1374 #endif
1375 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1376         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1377             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1378             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1379                        br->multicast_query_use_ifaddr) ||
1380             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1381             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1382                        br->multicast_stats_enabled) ||
1383             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1384                         br->hash_elasticity) ||
1385             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1386             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1387                         br->multicast_last_member_count) ||
1388             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1389                         br->multicast_startup_query_count) ||
1390             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1391                        br->multicast_igmp_version))
1392                 return -EMSGSIZE;
1393 #if IS_ENABLED(CONFIG_IPV6)
1394         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1395                        br->multicast_mld_version))
1396                 return -EMSGSIZE;
1397 #endif
1398         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1399         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1400                               IFLA_BR_PAD))
1401                 return -EMSGSIZE;
1402         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1403         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1404                               IFLA_BR_PAD))
1405                 return -EMSGSIZE;
1406         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1407         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1408                               IFLA_BR_PAD))
1409                 return -EMSGSIZE;
1410         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1411         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1412                               IFLA_BR_PAD))
1413                 return -EMSGSIZE;
1414         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1415         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1416                               IFLA_BR_PAD))
1417                 return -EMSGSIZE;
1418         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1419         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1420                               IFLA_BR_PAD))
1421                 return -EMSGSIZE;
1422 #endif
1423 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1424         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1425                        br->nf_call_iptables ? 1 : 0) ||
1426             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1427                        br->nf_call_ip6tables ? 1 : 0) ||
1428             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1429                        br->nf_call_arptables ? 1 : 0))
1430                 return -EMSGSIZE;
1431 #endif
1432
1433         return 0;
1434 }
1435
1436 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1437 {
1438         struct net_bridge_port *p = NULL;
1439         struct net_bridge_vlan_group *vg;
1440         struct net_bridge_vlan *v;
1441         struct net_bridge *br;
1442         int numvls = 0;
1443
1444         switch (attr) {
1445         case IFLA_STATS_LINK_XSTATS:
1446                 br = netdev_priv(dev);
1447                 vg = br_vlan_group(br);
1448                 break;
1449         case IFLA_STATS_LINK_XSTATS_SLAVE:
1450                 p = br_port_get_rtnl(dev);
1451                 if (!p)
1452                         return 0;
1453                 br = p->br;
1454                 vg = nbp_vlan_group(p);
1455                 break;
1456         default:
1457                 return 0;
1458         }
1459
1460         if (vg) {
1461                 /* we need to count all, even placeholder entries */
1462                 list_for_each_entry(v, &vg->vlan_list, vlist)
1463                         numvls++;
1464         }
1465
1466         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1467                nla_total_size(sizeof(struct br_mcast_stats)) +
1468                nla_total_size(0);
1469 }
1470
1471 static int br_fill_linkxstats(struct sk_buff *skb,
1472                               const struct net_device *dev,
1473                               int *prividx, int attr)
1474 {
1475         struct nlattr *nla __maybe_unused;
1476         struct net_bridge_port *p = NULL;
1477         struct net_bridge_vlan_group *vg;
1478         struct net_bridge_vlan *v;
1479         struct net_bridge *br;
1480         struct nlattr *nest;
1481         int vl_idx = 0;
1482
1483         switch (attr) {
1484         case IFLA_STATS_LINK_XSTATS:
1485                 br = netdev_priv(dev);
1486                 vg = br_vlan_group(br);
1487                 break;
1488         case IFLA_STATS_LINK_XSTATS_SLAVE:
1489                 p = br_port_get_rtnl(dev);
1490                 if (!p)
1491                         return 0;
1492                 br = p->br;
1493                 vg = nbp_vlan_group(p);
1494                 break;
1495         default:
1496                 return -EINVAL;
1497         }
1498
1499         nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE);
1500         if (!nest)
1501                 return -EMSGSIZE;
1502
1503         if (vg) {
1504                 u16 pvid;
1505
1506                 pvid = br_get_pvid(vg);
1507                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1508                         struct bridge_vlan_xstats vxi;
1509                         struct br_vlan_stats stats;
1510
1511                         if (++vl_idx < *prividx)
1512                                 continue;
1513                         memset(&vxi, 0, sizeof(vxi));
1514                         vxi.vid = v->vid;
1515                         vxi.flags = v->flags;
1516                         if (v->vid == pvid)
1517                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1518                         br_vlan_get_stats(v, &stats);
1519                         vxi.rx_bytes = stats.rx_bytes;
1520                         vxi.rx_packets = stats.rx_packets;
1521                         vxi.tx_bytes = stats.tx_bytes;
1522                         vxi.tx_packets = stats.tx_packets;
1523
1524                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1525                                 goto nla_put_failure;
1526                 }
1527         }
1528
1529 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1530         if (++vl_idx >= *prividx) {
1531                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1532                                         sizeof(struct br_mcast_stats),
1533                                         BRIDGE_XSTATS_PAD);
1534                 if (!nla)
1535                         goto nla_put_failure;
1536                 br_multicast_get_stats(br, p, nla_data(nla));
1537         }
1538 #endif
1539         nla_nest_end(skb, nest);
1540         *prividx = 0;
1541
1542         return 0;
1543
1544 nla_put_failure:
1545         nla_nest_end(skb, nest);
1546         *prividx = vl_idx;
1547
1548         return -EMSGSIZE;
1549 }
1550
1551 static struct rtnl_af_ops br_af_ops __read_mostly = {
1552         .family                 = AF_BRIDGE,
1553         .get_link_af_size       = br_get_link_af_size_filtered,
1554 };
1555
1556 struct rtnl_link_ops br_link_ops __read_mostly = {
1557         .kind                   = "bridge",
1558         .priv_size              = sizeof(struct net_bridge),
1559         .setup                  = br_dev_setup,
1560         .maxtype                = IFLA_BR_MAX,
1561         .policy                 = br_policy,
1562         .validate               = br_validate,
1563         .newlink                = br_dev_newlink,
1564         .changelink             = br_changelink,
1565         .dellink                = br_dev_delete,
1566         .get_size               = br_get_size,
1567         .fill_info              = br_fill_info,
1568         .fill_linkxstats        = br_fill_linkxstats,
1569         .get_linkxstats_size    = br_get_linkxstats_size,
1570
1571         .slave_maxtype          = IFLA_BRPORT_MAX,
1572         .slave_policy           = br_port_policy,
1573         .slave_changelink       = br_port_slave_changelink,
1574         .get_slave_size         = br_port_get_slave_size,
1575         .fill_slave_info        = br_port_fill_slave_info,
1576 };
1577
1578 int __init br_netlink_init(void)
1579 {
1580         int err;
1581
1582         br_mdb_init();
1583         rtnl_af_register(&br_af_ops);
1584
1585         err = rtnl_link_register(&br_link_ops);
1586         if (err)
1587                 goto out_af;
1588
1589         return 0;
1590
1591 out_af:
1592         rtnl_af_unregister(&br_af_ops);
1593         br_mdb_uninit();
1594         return err;
1595 }
1596
1597 void br_netlink_fini(void)
1598 {
1599         br_mdb_uninit();
1600         rtnl_af_unregister(&br_af_ops);
1601         rtnl_link_unregister(&br_link_ops);
1602 }