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
  24 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  25                                 u32 filter_mask)
  26 {
  27         struct net_bridge_vlan *v;
  28         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
  29         u16 flags, pvid;
  30         int num_vlans = 0;
  31
  32         if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
  33                 return 0;
  34
  35         pvid = br_get_pvid(vg);
  36         /* Count number of vlan infos */
  37         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
  38                 flags = 0;
  39                 /* only a context, bridge vlan not activated */
  40                 if (!br_vlan_should_use(v))
  41                         continue;
  42                 if (v->vid == pvid)
  43                         flags |= BRIDGE_VLAN_INFO_PVID;
  44
  45                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
  46                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
  47
  48                 if (vid_range_start == 0) {
  49                         goto initvars;
  50                 } else if ((v->vid - vid_range_end) == 1 &&
  51                         flags == vid_range_flags) {
  52                         vid_range_end = v->vid;
  53                         continue;
  54                 } else {
  55                         if ((vid_range_end - vid_range_start) > 0)
  56                                 num_vlans += 2;
  57                         else
  58                                 num_vlans += 1;
  59                 }
  60 initvars:
  61                 vid_range_start = v->vid;
  62                 vid_range_end = v->vid;
  63                 vid_range_flags = flags;
  64         }
  65
  66         if (vid_range_start != 0) {
  67                 if ((vid_range_end - vid_range_start) > 0)
  68                         num_vlans += 2;
  69                 else
  70                         num_vlans += 1;
  71         }
  72
  73         return num_vlans;
  74 }
  75
  76 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  77                                  u32 filter_mask)
  78 {
  79         int num_vlans;
  80
  81         if (!vg)
  82                 return 0;
  83
  84         if (filter_mask & RTEXT_FILTER_BRVLAN)
  85                 return vg->num_vlans;
  86
  87         rcu_read_lock();
  88         num_vlans = __get_num_vlan_infos(vg, filter_mask);
  89         rcu_read_unlock();
  90
  91         return num_vlans;
  92 }
  93
  94 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
  95                                            u32 filter_mask)
  96 {
  97         struct net_bridge_vlan_group *vg = NULL;
  98         struct net_bridge_port *p;
  99         struct net_bridge *br;
 100         int num_vlan_infos;
 101
 102         rcu_read_lock();
 103         if (br_port_exists(dev)) {
 104                 p = br_port_get_rcu(dev);
 105                 vg = nbp_vlan_group(p);
 106         } else if (dev->priv_flags & IFF_EBRIDGE) {
 107                 br = netdev_priv(dev);
 108                 vg = br_vlan_group(br);
 109         }
 110         num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
 111         rcu_read_unlock();
 112
 113         /* Each VLAN is returned in bridge_vlan_info along with flags */
 114         return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
 115 }
 116
 117 static inline size_t br_port_info_size(void)
 118 {
 119         return nla_total_size(1)        /* IFLA_BRPORT_STATE  */
 120                 + nla_total_size(2)     /* IFLA_BRPORT_PRIORITY */
 121                 + nla_total_size(4)     /* IFLA_BRPORT_COST */
 122                 + nla_total_size(1)     /* IFLA_BRPORT_MODE */
 123                 + nla_total_size(1)     /* IFLA_BRPORT_GUARD */
 124                 + nla_total_size(1)     /* IFLA_BRPORT_PROTECT */
 125                 + nla_total_size(1)     /* IFLA_BRPORT_FAST_LEAVE */
 126                 + nla_total_size(1)     /* IFLA_BRPORT_LEARNING */
 127                 + nla_total_size(1)     /* IFLA_BRPORT_UNICAST_FLOOD */
 128                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP */
 129                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP_WIFI */
 130                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
 131                 + 0;
 132 }
 133
 134 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
 135 {
 136         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
 137                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
 138                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
 139                 + nla_total_size(4) /* IFLA_MASTER */
 140                 + nla_total_size(4) /* IFLA_MTU */
 141                 + nla_total_size(4) /* IFLA_LINK */
 142                 + nla_total_size(1) /* IFLA_OPERSTATE */
 143                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
 144                 + nla_total_size(br_get_link_af_size_filtered(dev,
 145                                  filter_mask)); /* IFLA_AF_SPEC */
 146 }
 147
 148 static int br_port_fill_attrs(struct sk_buff *skb,
 149                               const struct net_bridge_port *p)
 150 {
 151         u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
 152
 153         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
 154             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
 155             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
 156             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
 157             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
 158             nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
 159             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
 160             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
 161             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
 162             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
 163             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
 164                        !!(p->flags & BR_PROXYARP_WIFI)) ||
 165             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
 166                     &p->designated_root))
 167                 return -EMSGSIZE;
 168
 169         return 0;
 170 }
 171
 172 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
 173                                     u16 vid_end, u16 flags)
 174 {
 175         struct  bridge_vlan_info vinfo;
 176
 177         if ((vid_end - vid_start) > 0) {
 178                 /* add range to skb */
 179                 vinfo.vid = vid_start;
 180                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
 181                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 182                             sizeof(vinfo), &vinfo))
 183                         goto nla_put_failure;
 184
 185                 vinfo.vid = vid_end;
 186                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
 187                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 188                             sizeof(vinfo), &vinfo))
 189                         goto nla_put_failure;
 190         } else {
 191                 vinfo.vid = vid_start;
 192                 vinfo.flags = flags;
 193                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 194                             sizeof(vinfo), &vinfo))
 195                         goto nla_put_failure;
 196         }
 197
 198         return 0;
 199
 200 nla_put_failure:
 201         return -EMSGSIZE;
 202 }
 203
 204 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
 205                                          struct net_bridge_vlan_group *vg)
 206 {
 207         struct net_bridge_vlan *v;
 208         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 209         u16 flags, pvid;
 210         int err = 0;
 211
 212         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
 213          * and mark vlan info with begin and end flags
 214          * if vlaninfo represents a range
 215          */
 216         pvid = br_get_pvid(vg);
 217         list_for_each_entry(v, &vg->vlan_list, vlist) {
 218                 flags = 0;
 219                 if (!br_vlan_should_use(v))
 220                         continue;
 221                 if (v->vid == pvid)
 222                         flags |= BRIDGE_VLAN_INFO_PVID;
 223
 224                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 225                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 226
 227                 if (vid_range_start == 0) {
 228                         goto initvars;
 229                 } else if ((v->vid - vid_range_end) == 1 &&
 230                         flags == vid_range_flags) {
 231                         vid_range_end = v->vid;
 232                         continue;
 233                 } else {
 234                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 235                                                        vid_range_end,
 236                                                        vid_range_flags);
 237                         if (err)
 238                                 return err;
 239                 }
 240
 241 initvars:
 242                 vid_range_start = v->vid;
 243                 vid_range_end = v->vid;
 244                 vid_range_flags = flags;
 245         }
 246
 247         if (vid_range_start != 0) {
 248                 /* Call it once more to send any left over vlans */
 249                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 250                                                vid_range_end,
 251                                                vid_range_flags);
 252                 if (err)
 253                         return err;
 254         }
 255
 256         return 0;
 257 }
 258
 259 static int br_fill_ifvlaninfo(struct sk_buff *skb,
 260                               struct net_bridge_vlan_group *vg)
 261 {
 262         struct bridge_vlan_info vinfo;
 263         struct net_bridge_vlan *v;
 264         u16 pvid;
 265
 266         pvid = br_get_pvid(vg);
 267         list_for_each_entry(v, &vg->vlan_list, vlist) {
 268                 if (!br_vlan_should_use(v))
 269                         continue;
 270
 271                 vinfo.vid = v->vid;
 272                 vinfo.flags = 0;
 273                 if (v->vid == pvid)
 274                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
 275
 276                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 277                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 278
 279                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 280                             sizeof(vinfo), &vinfo))
 281                         goto nla_put_failure;
 282         }
 283
 284         return 0;
 285
 286 nla_put_failure:
 287         return -EMSGSIZE;
 288 }
 289
 290 /*
 291  * Create one netlink message for one interface
 292  * Contains port and master info as well as carrier and bridge state.
 293  */
 294 static int br_fill_ifinfo(struct sk_buff *skb,
 295                           struct net_bridge_port *port,
 296                           u32 pid, u32 seq, int event, unsigned int flags,
 297                           u32 filter_mask, const struct net_device *dev)
 298 {
 299         struct net_bridge *br;
 300         struct ifinfomsg *hdr;
 301         struct nlmsghdr *nlh;
 302         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
 303
 304         if (port)
 305                 br = port->br;
 306         else
 307                 br = netdev_priv(dev);
 308
 309         br_debug(br, "br_fill_info event %d port %s master %s\n",
 310                      event, dev->name, br->dev->name);
 311
 312         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
 313         if (nlh == NULL)
 314                 return -EMSGSIZE;
 315
 316         hdr = nlmsg_data(nlh);
 317         hdr->ifi_family = AF_BRIDGE;
 318         hdr->__ifi_pad = 0;
 319         hdr->ifi_type = dev->type;
 320         hdr->ifi_index = dev->ifindex;
 321         hdr->ifi_flags = dev_get_flags(dev);
 322         hdr->ifi_change = 0;
 323
 324         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
 325             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
 326             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
 327             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
 328             (dev->addr_len &&
 329              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
 330             (dev->ifindex != dev_get_iflink(dev) &&
 331              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
 332                 goto nla_put_failure;
 333
 334         if (event == RTM_NEWLINK && port) {
 335                 struct nlattr *nest
 336                         = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
 337
 338                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 339                         goto nla_put_failure;
 340                 nla_nest_end(skb, nest);
 341         }
 342
 343         /* Check if  the VID information is requested */
 344         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
 345             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
 346                 struct net_bridge_vlan_group *vg;
 347                 struct nlattr *af;
 348                 int err;
 349
 350                 if (port)
 351                         vg = nbp_vlan_group(port);
 352                 else
 353                         vg = br_vlan_group(br);
 354
 355                 if (!vg || !vg->num_vlans)
 356                         goto done;
 357
 358                 af = nla_nest_start(skb, IFLA_AF_SPEC);
 359                 if (!af)
 360                         goto nla_put_failure;
 361
 362                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 363                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 364                 else
 365                         err = br_fill_ifvlaninfo(skb, vg);
 366                 if (err)
 367                         goto nla_put_failure;
 368                 nla_nest_end(skb, af);
 369         }
 370
 371 done:
 372         nlmsg_end(skb, nlh);
 373         return 0;
 374
 375 nla_put_failure:
 376         nlmsg_cancel(skb, nlh);
 377         return -EMSGSIZE;
 378 }
 379
 380 /*
 381  * Notify listeners of a change in port information
 382  */
 383 void br_ifinfo_notify(int event, struct net_bridge_port *port)
 384 {
 385         struct net *net;
 386         struct sk_buff *skb;
 387         int err = -ENOBUFS;
 388         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 389
 390         if (!port)
 391                 return;
 392
 393         net = dev_net(port->dev);
 394         br_debug(port->br, "port %u(%s) event %d\n",
 395                  (unsigned int)port->port_no, port->dev->name, event);
 396
 397         skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
 398         if (skb == NULL)
 399                 goto errout;
 400
 401         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
 402         if (err < 0) {
 403                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 404                 WARN_ON(err == -EMSGSIZE);
 405                 kfree_skb(skb);
 406                 goto errout;
 407         }
 408         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 409         return;
 410 errout:
 411         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 412 }
 413
 414
 415 /*
 416  * Dump information about all ports, in response to GETLINK
 417  */
 418 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 419                struct net_device *dev, u32 filter_mask, int nlflags)
 420 {
 421         struct net_bridge_port *port = br_port_get_rtnl(dev);
 422
 423         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 424             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
 425                 return 0;
 426
 427         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 428                               filter_mask, dev);
 429 }
 430
 431 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 432                         int cmd, struct bridge_vlan_info *vinfo)
 433 {
 434         int err = 0;
 435
 436         switch (cmd) {
 437         case RTM_SETLINK:
 438                 if (p) {
 439                         /* if the MASTER flag is set this will act on the global
 440                          * per-VLAN entry as well
 441                          */
 442                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
 443                         if (err)
 444                                 break;
 445                 } else {
 446                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 447                         err = br_vlan_add(br, vinfo->vid, vinfo->flags);
 448                 }
 449                 break;
 450
 451         case RTM_DELLINK:
 452                 if (p) {
 453                         nbp_vlan_delete(p, vinfo->vid);
 454                         if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
 455                                 br_vlan_delete(p->br, vinfo->vid);
 456                 } else {
 457                         br_vlan_delete(br, vinfo->vid);
 458                 }
 459                 break;
 460         }
 461
 462         return err;
 463 }
 464
 465 static int br_afspec(struct net_bridge *br,
 466                      struct net_bridge_port *p,
 467                      struct nlattr *af_spec,
 468                      int cmd)
 469 {
 470         struct bridge_vlan_info *vinfo_start = NULL;
 471         struct bridge_vlan_info *vinfo = NULL;
 472         struct nlattr *attr;
 473         int err = 0;
 474         int rem;
 475
 476         nla_for_each_nested(attr, af_spec, rem) {
 477                 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
 478                         continue;
 479                 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 480                         return -EINVAL;
 481                 vinfo = nla_data(attr);
 482                 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
 483                         return -EINVAL;
 484                 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 485                         if (vinfo_start)
 486                                 return -EINVAL;
 487                         vinfo_start = vinfo;
 488                         continue;
 489                 }
 490
 491                 if (vinfo_start) {
 492                         struct bridge_vlan_info tmp_vinfo;
 493                         int v;
 494
 495                         if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
 496                                 return -EINVAL;
 497
 498                         if (vinfo->vid <= vinfo_start->vid)
 499                                 return -EINVAL;
 500
 501                         memcpy(&tmp_vinfo, vinfo_start,
 502                                sizeof(struct bridge_vlan_info));
 503
 504                         for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
 505                                 tmp_vinfo.vid = v;
 506                                 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
 507                                 if (err)
 508                                         break;
 509                         }
 510                         vinfo_start = NULL;
 511                 } else {
 512                         err = br_vlan_info(br, p, cmd, vinfo);
 513                 }
 514                 if (err)
 515                         break;
 516         }
 517
 518         return err;
 519 }
 520
 521 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 522         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 523         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 524         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 525         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 526         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 527         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 528         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 529         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 530         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 531         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 532         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 533 };
 534
 535 /* Change the state of the port and notify spanning tree */
 536 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 537 {
 538         if (state > BR_STATE_BLOCKING)
 539                 return -EINVAL;
 540
 541         /* if kernel STP is running, don't allow changes */
 542         if (p->br->stp_enabled == BR_KERNEL_STP)
 543                 return -EBUSY;
 544
 545         /* if device is not up, change is not allowed
 546          * if link is not present, only allowable state is disabled
 547          */
 548         if (!netif_running(p->dev) ||
 549             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 550                 return -ENETDOWN;
 551
 552         br_set_state(p, state);
 553         br_log_state(p);
 554         br_port_state_selection(p->br);
 555         return 0;
 556 }
 557
 558 /* Set/clear or port flags based on attribute */
 559 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 560                            int attrtype, unsigned long mask)
 561 {
 562         if (tb[attrtype]) {
 563                 u8 flag = nla_get_u8(tb[attrtype]);
 564                 if (flag)
 565                         p->flags |= mask;
 566                 else
 567                         p->flags &= ~mask;
 568         }
 569 }
 570
 571 /* Process bridge protocol info on port */
 572 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 573 {
 574         int err;
 575         unsigned long old_flags = p->flags;
 576
 577         br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 578         br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 579         br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 580         br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 581         br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 582         br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 583         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 584         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 585
 586         if (tb[IFLA_BRPORT_COST]) {
 587                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 588                 if (err)
 589                         return err;
 590         }
 591
 592         if (tb[IFLA_BRPORT_PRIORITY]) {
 593                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 594                 if (err)
 595                         return err;
 596         }
 597
 598         if (tb[IFLA_BRPORT_STATE]) {
 599                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 600                 if (err)
 601                         return err;
 602         }
 603
 604         br_port_flags_change(p, old_flags ^ p->flags);
 605         return 0;
 606 }
 607
 608 /* Change state and parameters on port. */
 609 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 610 {
 611         struct nlattr *protinfo;
 612         struct nlattr *afspec;
 613         struct net_bridge_port *p;
 614         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 615         int err = 0;
 616
 617         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 618         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 619         if (!protinfo && !afspec)
 620                 return 0;
 621
 622         p = br_port_get_rtnl(dev);
 623         /* We want to accept dev as bridge itself if the AF_SPEC
 624          * is set to see if someone is setting vlan info on the bridge
 625          */
 626         if (!p && !afspec)
 627                 return -EINVAL;
 628
 629         if (p && protinfo) {
 630                 if (protinfo->nla_type & NLA_F_NESTED) {
 631                         err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
 632                                                protinfo, br_port_policy);
 633                         if (err)
 634                                 return err;
 635
 636                         spin_lock_bh(&p->br->lock);
 637                         err = br_setport(p, tb);
 638                         spin_unlock_bh(&p->br->lock);
 639                 } else {
 640                         /* Binary compatibility with old RSTP */
 641                         if (nla_len(protinfo) < sizeof(u8))
 642                                 return -EINVAL;
 643
 644                         spin_lock_bh(&p->br->lock);
 645                         err = br_set_port_state(p, nla_get_u8(protinfo));
 646                         spin_unlock_bh(&p->br->lock);
 647                 }
 648                 if (err)
 649                         goto out;
 650         }
 651
 652         if (afspec) {
 653                 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 654                                 afspec, RTM_SETLINK);
 655         }
 656
 657         if (err == 0)
 658                 br_ifinfo_notify(RTM_NEWLINK, p);
 659 out:
 660         return err;
 661 }
 662
 663 /* Delete port information */
 664 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 665 {
 666         struct nlattr *afspec;
 667         struct net_bridge_port *p;
 668         int err = 0;
 669
 670         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 671         if (!afspec)
 672                 return 0;
 673
 674         p = br_port_get_rtnl(dev);
 675         /* We want to accept dev as bridge itself as well */
 676         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
 677                 return -EINVAL;
 678
 679         err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 680                         afspec, RTM_DELLINK);
 681         if (err == 0)
 682                 /* Send RTM_NEWLINK because userspace
 683                  * expects RTM_NEWLINK for vlan dels
 684                  */
 685                 br_ifinfo_notify(RTM_NEWLINK, p);
 686
 687         return err;
 688 }
 689 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
 690 {
 691         if (tb[IFLA_ADDRESS]) {
 692                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 693                         return -EINVAL;
 694                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 695                         return -EADDRNOTAVAIL;
 696         }
 697
 698         if (!data)
 699                 return 0;
 700
 701 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 702         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 703                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
 704                 case htons(ETH_P_8021Q):
 705                 case htons(ETH_P_8021AD):
 706                         break;
 707                 default:
 708                         return -EPROTONOSUPPORT;
 709                 }
 710         }
 711 #endif
 712
 713         return 0;
 714 }
 715
 716 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
 717                           struct nlattr *tb[], struct nlattr *data[])
 718 {
 719         struct net_bridge *br = netdev_priv(dev);
 720
 721         if (tb[IFLA_ADDRESS]) {
 722                 spin_lock_bh(&br->lock);
 723                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
 724                 spin_unlock_bh(&br->lock);
 725         }
 726
 727         return register_netdevice(dev);
 728 }
 729
 730 static int br_port_slave_changelink(struct net_device *brdev,
 731                                     struct net_device *dev,
 732                                     struct nlattr *tb[],
 733                                     struct nlattr *data[])
 734 {
 735         struct net_bridge *br = netdev_priv(brdev);
 736         int ret;
 737
 738         if (!data)
 739                 return 0;
 740
 741         spin_lock_bh(&br->lock);
 742         ret = br_setport(br_port_get_rtnl(dev), data);
 743         spin_unlock_bh(&br->lock);
 744
 745         return ret;
 746 }
 747
 748 static int br_port_fill_slave_info(struct sk_buff *skb,
 749                                    const struct net_device *brdev,
 750                                    const struct net_device *dev)
 751 {
 752         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
 753 }
 754
 755 static size_t br_port_get_slave_size(const struct net_device *brdev,
 756                                      const struct net_device *dev)
 757 {
 758         return br_port_info_size();
 759 }
 760
 761 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
 762         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
 763         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
 764         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
 765         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
 766         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
 767         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
 768         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
 769         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
 770         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
 771         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
 772                                  .len  = ETH_ALEN },
 773         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
 774         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
 775         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
 776         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
 777         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
 778         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
 779         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
 780         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
 781         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
 782         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
 783         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
 784         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
 785         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
 786         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
 787         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
 788         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
 789         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
 790         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
 791 };
 792
 793 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
 794                          struct nlattr *data[])
 795 {
 796         struct net_bridge *br = netdev_priv(brdev);
 797         int err;
 798
 799         if (!data)
 800                 return 0;
 801
 802         if (data[IFLA_BR_FORWARD_DELAY]) {
 803                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
 804                 if (err)
 805                         return err;
 806         }
 807
 808         if (data[IFLA_BR_HELLO_TIME]) {
 809                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
 810                 if (err)
 811                         return err;
 812         }
 813
 814         if (data[IFLA_BR_MAX_AGE]) {
 815                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
 816                 if (err)
 817                         return err;
 818         }
 819
 820         if (data[IFLA_BR_AGEING_TIME]) {
 821                 u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]);
 822
 823                 br->ageing_time = clock_t_to_jiffies(ageing_time);
 824         }
 825
 826         if (data[IFLA_BR_STP_STATE]) {
 827                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
 828
 829                 br_stp_set_enabled(br, stp_enabled);
 830         }
 831
 832         if (data[IFLA_BR_PRIORITY]) {
 833                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
 834
 835                 br_stp_set_bridge_priority(br, priority);
 836         }
 837
 838         if (data[IFLA_BR_VLAN_FILTERING]) {
 839                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
 840
 841                 err = __br_vlan_filter_toggle(br, vlan_filter);
 842                 if (err)
 843                         return err;
 844         }
 845
 846 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 847         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 848                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
 849
 850                 err = __br_vlan_set_proto(br, vlan_proto);
 851                 if (err)
 852                         return err;
 853         }
 854
 855         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 856                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 857
 858                 err = __br_vlan_set_default_pvid(br, defpvid);
 859                 if (err)
 860                         return err;
 861         }
 862 #endif
 863
 864         if (data[IFLA_BR_GROUP_FWD_MASK]) {
 865                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
 866
 867                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
 868                         return -EINVAL;
 869                 br->group_fwd_mask = fwd_mask;
 870         }
 871
 872         if (data[IFLA_BR_GROUP_ADDR]) {
 873                 u8 new_addr[ETH_ALEN];
 874
 875                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
 876                         return -EINVAL;
 877                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
 878                 if (!is_link_local_ether_addr(new_addr))
 879                         return -EINVAL;
 880                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
 881                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
 882                     new_addr[5] == 3)           /* 802.1X PAE address */
 883                         return -EINVAL;
 884                 spin_lock_bh(&br->lock);
 885                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
 886                 spin_unlock_bh(&br->lock);
 887                 br->group_addr_set = true;
 888                 br_recalculate_fwd_mask(br);
 889         }
 890
 891         if (data[IFLA_BR_FDB_FLUSH])
 892                 br_fdb_flush(br);
 893
 894 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 895         if (data[IFLA_BR_MCAST_ROUTER]) {
 896                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
 897
 898                 err = br_multicast_set_router(br, multicast_router);
 899                 if (err)
 900                         return err;
 901         }
 902
 903         if (data[IFLA_BR_MCAST_SNOOPING]) {
 904                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
 905
 906                 err = br_multicast_toggle(br, mcast_snooping);
 907                 if (err)
 908                         return err;
 909         }
 910
 911         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
 912                 u8 val;
 913
 914                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
 915                 br->multicast_query_use_ifaddr = !!val;
 916         }
 917
 918         if (data[IFLA_BR_MCAST_QUERIER]) {
 919                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
 920
 921                 err = br_multicast_set_querier(br, mcast_querier);
 922                 if (err)
 923                         return err;
 924         }
 925
 926         if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
 927                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
 928
 929                 br->hash_elasticity = val;
 930         }
 931
 932         if (data[IFLA_BR_MCAST_HASH_MAX]) {
 933                 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
 934
 935                 err = br_multicast_set_hash_max(br, hash_max);
 936                 if (err)
 937                         return err;
 938         }
 939
 940         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
 941                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
 942
 943                 br->multicast_last_member_count = val;
 944         }
 945
 946         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
 947                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
 948
 949                 br->multicast_startup_query_count = val;
 950         }
 951
 952         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
 953                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
 954
 955                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
 956         }
 957
 958         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
 959                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
 960
 961                 br->multicast_membership_interval = clock_t_to_jiffies(val);
 962         }
 963
 964         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
 965                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
 966
 967                 br->multicast_querier_interval = clock_t_to_jiffies(val);
 968         }
 969
 970         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
 971                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
 972
 973                 br->multicast_query_interval = clock_t_to_jiffies(val);
 974         }
 975
 976         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
 977                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
 978
 979                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
 980         }
 981
 982         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
 983                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
 984
 985                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
 986         }
 987 #endif
 988 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 989         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
 990                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
 991
 992                 br->nf_call_iptables = val ? true : false;
 993         }
 994
 995         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
 996                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
 997
 998                 br->nf_call_ip6tables = val ? true : false;
 999         }
1000
1001         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1002                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1003
1004                 br->nf_call_arptables = val ? true : false;
1005         }
1006 #endif
1007
1008         return 0;
1009 }
1010
1011 static size_t br_get_size(const struct net_device *brdev)
1012 {
1013         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1014                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1015                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1016                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1017                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1018                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1019                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1020 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1021                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1022                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1023 #endif
1024                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1025                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1026                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1027                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1028                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1029                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1030                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1031                nla_total_size(sizeof(u64)) +    /* IFLA_BR_HELLO_TIMER */
1032                nla_total_size(sizeof(u64)) +    /* IFLA_BR_TCN_TIMER */
1033                nla_total_size(sizeof(u64)) +    /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1034                nla_total_size(sizeof(u64)) +    /* IFLA_BR_GC_TIMER */
1035                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1036 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1037                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1038                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1039                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1040                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1041                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1042                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1043                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1044                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1045                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1046                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1047                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERIER_INTVL */
1048                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERY_INTVL */
1049                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1050                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1051 #endif
1052 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1053                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1054                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1055                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1056 #endif
1057                0;
1058 }
1059
1060 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1061 {
1062         struct net_bridge *br = netdev_priv(brdev);
1063         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1064         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1065         u32 age_time = jiffies_to_clock_t(br->max_age);
1066         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1067         u32 stp_enabled = br->stp_enabled;
1068         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1069         u8 vlan_enabled = br_vlan_enabled(br);
1070         u64 clockval;
1071
1072         clockval = br_timer_value(&br->hello_timer);
1073         if (nla_put_u64(skb, IFLA_BR_HELLO_TIMER, clockval))
1074                 return -EMSGSIZE;
1075         clockval = br_timer_value(&br->tcn_timer);
1076         if (nla_put_u64(skb, IFLA_BR_TCN_TIMER, clockval))
1077                 return -EMSGSIZE;
1078         clockval = br_timer_value(&br->topology_change_timer);
1079         if (nla_put_u64(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval))
1080                 return -EMSGSIZE;
1081         clockval = br_timer_value(&br->gc_timer);
1082         if (nla_put_u64(skb, IFLA_BR_GC_TIMER, clockval))
1083                 return -EMSGSIZE;
1084
1085         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1086             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1087             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1088             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1089             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1090             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1091             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1092             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1093             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1094                     &br->bridge_id) ||
1095             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1096                     &br->designated_root) ||
1097             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1098             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1099             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1100             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1101                        br->topology_change_detected) ||
1102             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1103                 return -EMSGSIZE;
1104
1105 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1106         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1107             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid))
1108                 return -EMSGSIZE;
1109 #endif
1110 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1111         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1112             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1113             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1114                        br->multicast_query_use_ifaddr) ||
1115             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1116             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1117                         br->hash_elasticity) ||
1118             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1119             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1120                         br->multicast_last_member_count) ||
1121             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1122                         br->multicast_startup_query_count))
1123                 return -EMSGSIZE;
1124
1125         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1126         if (nla_put_u64(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval))
1127                 return -EMSGSIZE;
1128         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1129         if (nla_put_u64(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval))
1130                 return -EMSGSIZE;
1131         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1132         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval))
1133                 return -EMSGSIZE;
1134         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1135         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval))
1136                 return -EMSGSIZE;
1137         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1138         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval))
1139                 return -EMSGSIZE;
1140         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1141         if (nla_put_u64(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval))
1142                 return -EMSGSIZE;
1143 #endif
1144 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1145         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1146                        br->nf_call_iptables ? 1 : 0) ||
1147             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1148                        br->nf_call_ip6tables ? 1 : 0) ||
1149             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1150                        br->nf_call_arptables ? 1 : 0))
1151                 return -EMSGSIZE;
1152 #endif
1153
1154         return 0;
1155 }
1156
1157 static size_t br_get_link_af_size(const struct net_device *dev)
1158 {
1159         struct net_bridge_port *p;
1160         struct net_bridge *br;
1161         int num_vlans = 0;
1162
1163         if (br_port_exists(dev)) {
1164                 p = br_port_get_rtnl(dev);
1165                 num_vlans = br_get_num_vlan_infos(nbp_vlan_group(p),
1166                                                   RTEXT_FILTER_BRVLAN);
1167         } else if (dev->priv_flags & IFF_EBRIDGE) {
1168                 br = netdev_priv(dev);
1169                 num_vlans = br_get_num_vlan_infos(br_vlan_group(br),
1170                                                   RTEXT_FILTER_BRVLAN);
1171         }
1172
1173         /* Each VLAN is returned in bridge_vlan_info along with flags */
1174         return num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
1175 }
1176
1177 static struct rtnl_af_ops br_af_ops __read_mostly = {
1178         .family                 = AF_BRIDGE,
1179         .get_link_af_size       = br_get_link_af_size,
1180 };
1181
1182 struct rtnl_link_ops br_link_ops __read_mostly = {
1183         .kind                   = "bridge",
1184         .priv_size              = sizeof(struct net_bridge),
1185         .setup                  = br_dev_setup,
1186         .maxtype                = IFLA_BR_MAX,
1187         .policy                 = br_policy,
1188         .validate               = br_validate,
1189         .newlink                = br_dev_newlink,
1190         .changelink             = br_changelink,
1191         .dellink                = br_dev_delete,
1192         .get_size               = br_get_size,
1193         .fill_info              = br_fill_info,
1194
1195         .slave_maxtype          = IFLA_BRPORT_MAX,
1196         .slave_policy           = br_port_policy,
1197         .slave_changelink       = br_port_slave_changelink,
1198         .get_slave_size         = br_port_get_slave_size,
1199         .fill_slave_info        = br_port_fill_slave_info,
1200 };
1201
1202 int __init br_netlink_init(void)
1203 {
1204         int err;
1205
1206         br_mdb_init();
1207         rtnl_af_register(&br_af_ops);
1208
1209         err = rtnl_link_register(&br_link_ops);
1210         if (err)
1211                 goto out_af;
1212
1213         return 0;
1214
1215 out_af:
1216         rtnl_af_unregister(&br_af_ops);
1217         br_mdb_uninit();
1218         return err;
1219 }
1220
1221 void br_netlink_fini(void)
1222 {
1223         br_mdb_uninit();
1224         rtnl_af_unregister(&br_af_ops);
1225         rtnl_link_unregister(&br_link_ops);
1226 }