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                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
 132                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_PORT */
 133                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_COST */
 134                 + 0;
 135 }
 136
 137 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
 138 {
 139         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
 140                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
 141                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
 142                 + nla_total_size(4) /* IFLA_MASTER */
 143                 + nla_total_size(4) /* IFLA_MTU */
 144                 + nla_total_size(4) /* IFLA_LINK */
 145                 + nla_total_size(1) /* IFLA_OPERSTATE */
 146                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
 147                 + nla_total_size(br_get_link_af_size_filtered(dev,
 148                                  filter_mask)); /* IFLA_AF_SPEC */
 149 }
 150
 151 static int br_port_fill_attrs(struct sk_buff *skb,
 152                               const struct net_bridge_port *p)
 153 {
 154         u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
 155
 156         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
 157             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
 158             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
 159             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
 160             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
 161             nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
 162             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
 163             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
 164             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
 165             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
 166             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
 167                        !!(p->flags & BR_PROXYARP_WIFI)) ||
 168             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
 169                     &p->designated_root) ||
 170             nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
 171                     &p->designated_bridge) ||
 172             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
 173             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost))
 174                 return -EMSGSIZE;
 175
 176         return 0;
 177 }
 178
 179 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
 180                                     u16 vid_end, u16 flags)
 181 {
 182         struct  bridge_vlan_info vinfo;
 183
 184         if ((vid_end - vid_start) > 0) {
 185                 /* add range to skb */
 186                 vinfo.vid = vid_start;
 187                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
 188                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 189                             sizeof(vinfo), &vinfo))
 190                         goto nla_put_failure;
 191
 192                 vinfo.vid = vid_end;
 193                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
 194                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 195                             sizeof(vinfo), &vinfo))
 196                         goto nla_put_failure;
 197         } else {
 198                 vinfo.vid = vid_start;
 199                 vinfo.flags = flags;
 200                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 201                             sizeof(vinfo), &vinfo))
 202                         goto nla_put_failure;
 203         }
 204
 205         return 0;
 206
 207 nla_put_failure:
 208         return -EMSGSIZE;
 209 }
 210
 211 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
 212                                          struct net_bridge_vlan_group *vg)
 213 {
 214         struct net_bridge_vlan *v;
 215         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 216         u16 flags, pvid;
 217         int err = 0;
 218
 219         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
 220          * and mark vlan info with begin and end flags
 221          * if vlaninfo represents a range
 222          */
 223         pvid = br_get_pvid(vg);
 224         list_for_each_entry(v, &vg->vlan_list, vlist) {
 225                 flags = 0;
 226                 if (!br_vlan_should_use(v))
 227                         continue;
 228                 if (v->vid == pvid)
 229                         flags |= BRIDGE_VLAN_INFO_PVID;
 230
 231                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 232                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 233
 234                 if (vid_range_start == 0) {
 235                         goto initvars;
 236                 } else if ((v->vid - vid_range_end) == 1 &&
 237                         flags == vid_range_flags) {
 238                         vid_range_end = v->vid;
 239                         continue;
 240                 } else {
 241                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 242                                                        vid_range_end,
 243                                                        vid_range_flags);
 244                         if (err)
 245                                 return err;
 246                 }
 247
 248 initvars:
 249                 vid_range_start = v->vid;
 250                 vid_range_end = v->vid;
 251                 vid_range_flags = flags;
 252         }
 253
 254         if (vid_range_start != 0) {
 255                 /* Call it once more to send any left over vlans */
 256                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 257                                                vid_range_end,
 258                                                vid_range_flags);
 259                 if (err)
 260                         return err;
 261         }
 262
 263         return 0;
 264 }
 265
 266 static int br_fill_ifvlaninfo(struct sk_buff *skb,
 267                               struct net_bridge_vlan_group *vg)
 268 {
 269         struct bridge_vlan_info vinfo;
 270         struct net_bridge_vlan *v;
 271         u16 pvid;
 272
 273         pvid = br_get_pvid(vg);
 274         list_for_each_entry(v, &vg->vlan_list, vlist) {
 275                 if (!br_vlan_should_use(v))
 276                         continue;
 277
 278                 vinfo.vid = v->vid;
 279                 vinfo.flags = 0;
 280                 if (v->vid == pvid)
 281                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
 282
 283                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 284                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 285
 286                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 287                             sizeof(vinfo), &vinfo))
 288                         goto nla_put_failure;
 289         }
 290
 291         return 0;
 292
 293 nla_put_failure:
 294         return -EMSGSIZE;
 295 }
 296
 297 /*
 298  * Create one netlink message for one interface
 299  * Contains port and master info as well as carrier and bridge state.
 300  */
 301 static int br_fill_ifinfo(struct sk_buff *skb,
 302                           struct net_bridge_port *port,
 303                           u32 pid, u32 seq, int event, unsigned int flags,
 304                           u32 filter_mask, const struct net_device *dev)
 305 {
 306         struct net_bridge *br;
 307         struct ifinfomsg *hdr;
 308         struct nlmsghdr *nlh;
 309         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
 310
 311         if (port)
 312                 br = port->br;
 313         else
 314                 br = netdev_priv(dev);
 315
 316         br_debug(br, "br_fill_info event %d port %s master %s\n",
 317                      event, dev->name, br->dev->name);
 318
 319         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
 320         if (nlh == NULL)
 321                 return -EMSGSIZE;
 322
 323         hdr = nlmsg_data(nlh);
 324         hdr->ifi_family = AF_BRIDGE;
 325         hdr->__ifi_pad = 0;
 326         hdr->ifi_type = dev->type;
 327         hdr->ifi_index = dev->ifindex;
 328         hdr->ifi_flags = dev_get_flags(dev);
 329         hdr->ifi_change = 0;
 330
 331         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
 332             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
 333             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
 334             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
 335             (dev->addr_len &&
 336              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
 337             (dev->ifindex != dev_get_iflink(dev) &&
 338              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
 339                 goto nla_put_failure;
 340
 341         if (event == RTM_NEWLINK && port) {
 342                 struct nlattr *nest
 343                         = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
 344
 345                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 346                         goto nla_put_failure;
 347                 nla_nest_end(skb, nest);
 348         }
 349
 350         /* Check if  the VID information is requested */
 351         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
 352             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
 353                 struct net_bridge_vlan_group *vg;
 354                 struct nlattr *af;
 355                 int err;
 356
 357                 if (port)
 358                         vg = nbp_vlan_group(port);
 359                 else
 360                         vg = br_vlan_group(br);
 361
 362                 if (!vg || !vg->num_vlans)
 363                         goto done;
 364
 365                 af = nla_nest_start(skb, IFLA_AF_SPEC);
 366                 if (!af)
 367                         goto nla_put_failure;
 368
 369                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 370                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 371                 else
 372                         err = br_fill_ifvlaninfo(skb, vg);
 373                 if (err)
 374                         goto nla_put_failure;
 375                 nla_nest_end(skb, af);
 376         }
 377
 378 done:
 379         nlmsg_end(skb, nlh);
 380         return 0;
 381
 382 nla_put_failure:
 383         nlmsg_cancel(skb, nlh);
 384         return -EMSGSIZE;
 385 }
 386
 387 /*
 388  * Notify listeners of a change in port information
 389  */
 390 void br_ifinfo_notify(int event, struct net_bridge_port *port)
 391 {
 392         struct net *net;
 393         struct sk_buff *skb;
 394         int err = -ENOBUFS;
 395         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 396
 397         if (!port)
 398                 return;
 399
 400         net = dev_net(port->dev);
 401         br_debug(port->br, "port %u(%s) event %d\n",
 402                  (unsigned int)port->port_no, port->dev->name, event);
 403
 404         skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
 405         if (skb == NULL)
 406                 goto errout;
 407
 408         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
 409         if (err < 0) {
 410                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 411                 WARN_ON(err == -EMSGSIZE);
 412                 kfree_skb(skb);
 413                 goto errout;
 414         }
 415         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 416         return;
 417 errout:
 418         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 419 }
 420
 421
 422 /*
 423  * Dump information about all ports, in response to GETLINK
 424  */
 425 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 426                struct net_device *dev, u32 filter_mask, int nlflags)
 427 {
 428         struct net_bridge_port *port = br_port_get_rtnl(dev);
 429
 430         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 431             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
 432                 return 0;
 433
 434         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 435                               filter_mask, dev);
 436 }
 437
 438 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 439                         int cmd, struct bridge_vlan_info *vinfo)
 440 {
 441         int err = 0;
 442
 443         switch (cmd) {
 444         case RTM_SETLINK:
 445                 if (p) {
 446                         /* if the MASTER flag is set this will act on the global
 447                          * per-VLAN entry as well
 448                          */
 449                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
 450                         if (err)
 451                                 break;
 452                 } else {
 453                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 454                         err = br_vlan_add(br, vinfo->vid, vinfo->flags);
 455                 }
 456                 break;
 457
 458         case RTM_DELLINK:
 459                 if (p) {
 460                         nbp_vlan_delete(p, vinfo->vid);
 461                         if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
 462                                 br_vlan_delete(p->br, vinfo->vid);
 463                 } else {
 464                         br_vlan_delete(br, vinfo->vid);
 465                 }
 466                 break;
 467         }
 468
 469         return err;
 470 }
 471
 472 static int br_afspec(struct net_bridge *br,
 473                      struct net_bridge_port *p,
 474                      struct nlattr *af_spec,
 475                      int cmd)
 476 {
 477         struct bridge_vlan_info *vinfo_start = NULL;
 478         struct bridge_vlan_info *vinfo = NULL;
 479         struct nlattr *attr;
 480         int err = 0;
 481         int rem;
 482
 483         nla_for_each_nested(attr, af_spec, rem) {
 484                 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
 485                         continue;
 486                 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 487                         return -EINVAL;
 488                 vinfo = nla_data(attr);
 489                 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
 490                         return -EINVAL;
 491                 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 492                         if (vinfo_start)
 493                                 return -EINVAL;
 494                         vinfo_start = vinfo;
 495                         continue;
 496                 }
 497
 498                 if (vinfo_start) {
 499                         struct bridge_vlan_info tmp_vinfo;
 500                         int v;
 501
 502                         if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
 503                                 return -EINVAL;
 504
 505                         if (vinfo->vid <= vinfo_start->vid)
 506                                 return -EINVAL;
 507
 508                         memcpy(&tmp_vinfo, vinfo_start,
 509                                sizeof(struct bridge_vlan_info));
 510
 511                         for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
 512                                 tmp_vinfo.vid = v;
 513                                 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
 514                                 if (err)
 515                                         break;
 516                         }
 517                         vinfo_start = NULL;
 518                 } else {
 519                         err = br_vlan_info(br, p, cmd, vinfo);
 520                 }
 521                 if (err)
 522                         break;
 523         }
 524
 525         return err;
 526 }
 527
 528 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 529         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 530         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 531         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 532         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 533         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 534         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 535         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 536         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 537         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 538         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 539         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 540 };
 541
 542 /* Change the state of the port and notify spanning tree */
 543 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 544 {
 545         if (state > BR_STATE_BLOCKING)
 546                 return -EINVAL;
 547
 548         /* if kernel STP is running, don't allow changes */
 549         if (p->br->stp_enabled == BR_KERNEL_STP)
 550                 return -EBUSY;
 551
 552         /* if device is not up, change is not allowed
 553          * if link is not present, only allowable state is disabled
 554          */
 555         if (!netif_running(p->dev) ||
 556             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 557                 return -ENETDOWN;
 558
 559         br_set_state(p, state);
 560         br_log_state(p);
 561         br_port_state_selection(p->br);
 562         return 0;
 563 }
 564
 565 /* Set/clear or port flags based on attribute */
 566 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 567                            int attrtype, unsigned long mask)
 568 {
 569         if (tb[attrtype]) {
 570                 u8 flag = nla_get_u8(tb[attrtype]);
 571                 if (flag)
 572                         p->flags |= mask;
 573                 else
 574                         p->flags &= ~mask;
 575         }
 576 }
 577
 578 /* Process bridge protocol info on port */
 579 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 580 {
 581         int err;
 582         unsigned long old_flags = p->flags;
 583
 584         br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 585         br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 586         br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 587         br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 588         br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 589         br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 590         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 591         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 592
 593         if (tb[IFLA_BRPORT_COST]) {
 594                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 595                 if (err)
 596                         return err;
 597         }
 598
 599         if (tb[IFLA_BRPORT_PRIORITY]) {
 600                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 601                 if (err)
 602                         return err;
 603         }
 604
 605         if (tb[IFLA_BRPORT_STATE]) {
 606                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 607                 if (err)
 608                         return err;
 609         }
 610
 611         br_port_flags_change(p, old_flags ^ p->flags);
 612         return 0;
 613 }
 614
 615 /* Change state and parameters on port. */
 616 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 617 {
 618         struct nlattr *protinfo;
 619         struct nlattr *afspec;
 620         struct net_bridge_port *p;
 621         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 622         int err = 0;
 623
 624         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 625         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 626         if (!protinfo && !afspec)
 627                 return 0;
 628
 629         p = br_port_get_rtnl(dev);
 630         /* We want to accept dev as bridge itself if the AF_SPEC
 631          * is set to see if someone is setting vlan info on the bridge
 632          */
 633         if (!p && !afspec)
 634                 return -EINVAL;
 635
 636         if (p && protinfo) {
 637                 if (protinfo->nla_type & NLA_F_NESTED) {
 638                         err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
 639                                                protinfo, br_port_policy);
 640                         if (err)
 641                                 return err;
 642
 643                         spin_lock_bh(&p->br->lock);
 644                         err = br_setport(p, tb);
 645                         spin_unlock_bh(&p->br->lock);
 646                 } else {
 647                         /* Binary compatibility with old RSTP */
 648                         if (nla_len(protinfo) < sizeof(u8))
 649                                 return -EINVAL;
 650
 651                         spin_lock_bh(&p->br->lock);
 652                         err = br_set_port_state(p, nla_get_u8(protinfo));
 653                         spin_unlock_bh(&p->br->lock);
 654                 }
 655                 if (err)
 656                         goto out;
 657         }
 658
 659         if (afspec) {
 660                 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 661                                 afspec, RTM_SETLINK);
 662         }
 663
 664         if (err == 0)
 665                 br_ifinfo_notify(RTM_NEWLINK, p);
 666 out:
 667         return err;
 668 }
 669
 670 /* Delete port information */
 671 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 672 {
 673         struct nlattr *afspec;
 674         struct net_bridge_port *p;
 675         int err = 0;
 676
 677         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 678         if (!afspec)
 679                 return 0;
 680
 681         p = br_port_get_rtnl(dev);
 682         /* We want to accept dev as bridge itself as well */
 683         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
 684                 return -EINVAL;
 685
 686         err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 687                         afspec, RTM_DELLINK);
 688         if (err == 0)
 689                 /* Send RTM_NEWLINK because userspace
 690                  * expects RTM_NEWLINK for vlan dels
 691                  */
 692                 br_ifinfo_notify(RTM_NEWLINK, p);
 693
 694         return err;
 695 }
 696 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
 697 {
 698         if (tb[IFLA_ADDRESS]) {
 699                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 700                         return -EINVAL;
 701                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 702                         return -EADDRNOTAVAIL;
 703         }
 704
 705         if (!data)
 706                 return 0;
 707
 708 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 709         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 710                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
 711                 case htons(ETH_P_8021Q):
 712                 case htons(ETH_P_8021AD):
 713                         break;
 714                 default:
 715                         return -EPROTONOSUPPORT;
 716                 }
 717         }
 718 #endif
 719
 720         return 0;
 721 }
 722
 723 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
 724                           struct nlattr *tb[], struct nlattr *data[])
 725 {
 726         struct net_bridge *br = netdev_priv(dev);
 727
 728         if (tb[IFLA_ADDRESS]) {
 729                 spin_lock_bh(&br->lock);
 730                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
 731                 spin_unlock_bh(&br->lock);
 732         }
 733
 734         return register_netdevice(dev);
 735 }
 736
 737 static int br_port_slave_changelink(struct net_device *brdev,
 738                                     struct net_device *dev,
 739                                     struct nlattr *tb[],
 740                                     struct nlattr *data[])
 741 {
 742         struct net_bridge *br = netdev_priv(brdev);
 743         int ret;
 744
 745         if (!data)
 746                 return 0;
 747
 748         spin_lock_bh(&br->lock);
 749         ret = br_setport(br_port_get_rtnl(dev), data);
 750         spin_unlock_bh(&br->lock);
 751
 752         return ret;
 753 }
 754
 755 static int br_port_fill_slave_info(struct sk_buff *skb,
 756                                    const struct net_device *brdev,
 757                                    const struct net_device *dev)
 758 {
 759         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
 760 }
 761
 762 static size_t br_port_get_slave_size(const struct net_device *brdev,
 763                                      const struct net_device *dev)
 764 {
 765         return br_port_info_size();
 766 }
 767
 768 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
 769         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
 770         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
 771         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
 772         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
 773         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
 774         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
 775         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
 776         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
 777         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
 778         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
 779                                  .len  = ETH_ALEN },
 780         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
 781         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
 782         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
 783         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
 784         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
 785         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
 786         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
 787         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
 788         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
 789         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
 790         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
 791         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
 792         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
 793         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
 794         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
 795         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
 796         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
 797         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
 798 };
 799
 800 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
 801                          struct nlattr *data[])
 802 {
 803         struct net_bridge *br = netdev_priv(brdev);
 804         int err;
 805
 806         if (!data)
 807                 return 0;
 808
 809         if (data[IFLA_BR_FORWARD_DELAY]) {
 810                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
 811                 if (err)
 812                         return err;
 813         }
 814
 815         if (data[IFLA_BR_HELLO_TIME]) {
 816                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
 817                 if (err)
 818                         return err;
 819         }
 820
 821         if (data[IFLA_BR_MAX_AGE]) {
 822                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
 823                 if (err)
 824                         return err;
 825         }
 826
 827         if (data[IFLA_BR_AGEING_TIME]) {
 828                 u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]);
 829
 830                 br->ageing_time = clock_t_to_jiffies(ageing_time);
 831         }
 832
 833         if (data[IFLA_BR_STP_STATE]) {
 834                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
 835
 836                 br_stp_set_enabled(br, stp_enabled);
 837         }
 838
 839         if (data[IFLA_BR_PRIORITY]) {
 840                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
 841
 842                 br_stp_set_bridge_priority(br, priority);
 843         }
 844
 845         if (data[IFLA_BR_VLAN_FILTERING]) {
 846                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
 847
 848                 err = __br_vlan_filter_toggle(br, vlan_filter);
 849                 if (err)
 850                         return err;
 851         }
 852
 853 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 854         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 855                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
 856
 857                 err = __br_vlan_set_proto(br, vlan_proto);
 858                 if (err)
 859                         return err;
 860         }
 861
 862         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 863                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 864
 865                 err = __br_vlan_set_default_pvid(br, defpvid);
 866                 if (err)
 867                         return err;
 868         }
 869 #endif
 870
 871         if (data[IFLA_BR_GROUP_FWD_MASK]) {
 872                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
 873
 874                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
 875                         return -EINVAL;
 876                 br->group_fwd_mask = fwd_mask;
 877         }
 878
 879         if (data[IFLA_BR_GROUP_ADDR]) {
 880                 u8 new_addr[ETH_ALEN];
 881
 882                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
 883                         return -EINVAL;
 884                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
 885                 if (!is_link_local_ether_addr(new_addr))
 886                         return -EINVAL;
 887                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
 888                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
 889                     new_addr[5] == 3)           /* 802.1X PAE address */
 890                         return -EINVAL;
 891                 spin_lock_bh(&br->lock);
 892                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
 893                 spin_unlock_bh(&br->lock);
 894                 br->group_addr_set = true;
 895                 br_recalculate_fwd_mask(br);
 896         }
 897
 898         if (data[IFLA_BR_FDB_FLUSH])
 899                 br_fdb_flush(br);
 900
 901 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 902         if (data[IFLA_BR_MCAST_ROUTER]) {
 903                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
 904
 905                 err = br_multicast_set_router(br, multicast_router);
 906                 if (err)
 907                         return err;
 908         }
 909
 910         if (data[IFLA_BR_MCAST_SNOOPING]) {
 911                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
 912
 913                 err = br_multicast_toggle(br, mcast_snooping);
 914                 if (err)
 915                         return err;
 916         }
 917
 918         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
 919                 u8 val;
 920
 921                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
 922                 br->multicast_query_use_ifaddr = !!val;
 923         }
 924
 925         if (data[IFLA_BR_MCAST_QUERIER]) {
 926                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
 927
 928                 err = br_multicast_set_querier(br, mcast_querier);
 929                 if (err)
 930                         return err;
 931         }
 932
 933         if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
 934                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
 935
 936                 br->hash_elasticity = val;
 937         }
 938
 939         if (data[IFLA_BR_MCAST_HASH_MAX]) {
 940                 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
 941
 942                 err = br_multicast_set_hash_max(br, hash_max);
 943                 if (err)
 944                         return err;
 945         }
 946
 947         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
 948                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
 949
 950                 br->multicast_last_member_count = val;
 951         }
 952
 953         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
 954                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
 955
 956                 br->multicast_startup_query_count = val;
 957         }
 958
 959         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
 960                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
 961
 962                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
 963         }
 964
 965         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
 966                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
 967
 968                 br->multicast_membership_interval = clock_t_to_jiffies(val);
 969         }
 970
 971         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
 972                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
 973
 974                 br->multicast_querier_interval = clock_t_to_jiffies(val);
 975         }
 976
 977         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
 978                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
 979
 980                 br->multicast_query_interval = clock_t_to_jiffies(val);
 981         }
 982
 983         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
 984                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
 985
 986                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
 987         }
 988
 989         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
 990                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
 991
 992                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
 993         }
 994 #endif
 995 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 996         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
 997                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
 998
 999                 br->nf_call_iptables = val ? true : false;
1000         }
1001
1002         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1003                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1004
1005                 br->nf_call_ip6tables = val ? true : false;
1006         }
1007
1008         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1009                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1010
1011                 br->nf_call_arptables = val ? true : false;
1012         }
1013 #endif
1014
1015         return 0;
1016 }
1017
1018 static size_t br_get_size(const struct net_device *brdev)
1019 {
1020         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1021                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1022                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1023                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1024                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1025                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1026                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1027 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1028                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1029                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1030 #endif
1031                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1032                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1033                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1034                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1035                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1036                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1037                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1038                nla_total_size(sizeof(u64)) +    /* IFLA_BR_HELLO_TIMER */
1039                nla_total_size(sizeof(u64)) +    /* IFLA_BR_TCN_TIMER */
1040                nla_total_size(sizeof(u64)) +    /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1041                nla_total_size(sizeof(u64)) +    /* IFLA_BR_GC_TIMER */
1042                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1043 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1044                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1045                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1046                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1047                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1048                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1049                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1050                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1051                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1052                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1053                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1054                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERIER_INTVL */
1055                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERY_INTVL */
1056                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1057                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1058 #endif
1059 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1060                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1061                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1062                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1063 #endif
1064                0;
1065 }
1066
1067 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1068 {
1069         struct net_bridge *br = netdev_priv(brdev);
1070         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1071         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1072         u32 age_time = jiffies_to_clock_t(br->max_age);
1073         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1074         u32 stp_enabled = br->stp_enabled;
1075         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1076         u8 vlan_enabled = br_vlan_enabled(br);
1077         u64 clockval;
1078
1079         clockval = br_timer_value(&br->hello_timer);
1080         if (nla_put_u64(skb, IFLA_BR_HELLO_TIMER, clockval))
1081                 return -EMSGSIZE;
1082         clockval = br_timer_value(&br->tcn_timer);
1083         if (nla_put_u64(skb, IFLA_BR_TCN_TIMER, clockval))
1084                 return -EMSGSIZE;
1085         clockval = br_timer_value(&br->topology_change_timer);
1086         if (nla_put_u64(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval))
1087                 return -EMSGSIZE;
1088         clockval = br_timer_value(&br->gc_timer);
1089         if (nla_put_u64(skb, IFLA_BR_GC_TIMER, clockval))
1090                 return -EMSGSIZE;
1091
1092         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1093             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1094             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1095             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1096             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1097             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1098             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1099             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1100             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1101                     &br->bridge_id) ||
1102             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1103                     &br->designated_root) ||
1104             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1105             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1106             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1107             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1108                        br->topology_change_detected) ||
1109             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1110                 return -EMSGSIZE;
1111
1112 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1113         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1114             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid))
1115                 return -EMSGSIZE;
1116 #endif
1117 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1118         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1119             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1120             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1121                        br->multicast_query_use_ifaddr) ||
1122             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1123             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1124                         br->hash_elasticity) ||
1125             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1126             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1127                         br->multicast_last_member_count) ||
1128             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1129                         br->multicast_startup_query_count))
1130                 return -EMSGSIZE;
1131
1132         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1133         if (nla_put_u64(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval))
1134                 return -EMSGSIZE;
1135         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1136         if (nla_put_u64(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval))
1137                 return -EMSGSIZE;
1138         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1139         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval))
1140                 return -EMSGSIZE;
1141         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1142         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval))
1143                 return -EMSGSIZE;
1144         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1145         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval))
1146                 return -EMSGSIZE;
1147         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1148         if (nla_put_u64(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval))
1149                 return -EMSGSIZE;
1150 #endif
1151 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1152         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1153                        br->nf_call_iptables ? 1 : 0) ||
1154             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1155                        br->nf_call_ip6tables ? 1 : 0) ||
1156             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1157                        br->nf_call_arptables ? 1 : 0))
1158                 return -EMSGSIZE;
1159 #endif
1160
1161         return 0;
1162 }
1163
1164 static size_t br_get_link_af_size(const struct net_device *dev)
1165 {
1166         struct net_bridge_port *p;
1167         struct net_bridge *br;
1168         int num_vlans = 0;
1169
1170         if (br_port_exists(dev)) {
1171                 p = br_port_get_rtnl(dev);
1172                 num_vlans = br_get_num_vlan_infos(nbp_vlan_group(p),
1173                                                   RTEXT_FILTER_BRVLAN);
1174         } else if (dev->priv_flags & IFF_EBRIDGE) {
1175                 br = netdev_priv(dev);
1176                 num_vlans = br_get_num_vlan_infos(br_vlan_group(br),
1177                                                   RTEXT_FILTER_BRVLAN);
1178         }
1179
1180         /* Each VLAN is returned in bridge_vlan_info along with flags */
1181         return num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
1182 }
1183
1184 static struct rtnl_af_ops br_af_ops __read_mostly = {
1185         .family                 = AF_BRIDGE,
1186         .get_link_af_size       = br_get_link_af_size,
1187 };
1188
1189 struct rtnl_link_ops br_link_ops __read_mostly = {
1190         .kind                   = "bridge",
1191         .priv_size              = sizeof(struct net_bridge),
1192         .setup                  = br_dev_setup,
1193         .maxtype                = IFLA_BR_MAX,
1194         .policy                 = br_policy,
1195         .validate               = br_validate,
1196         .newlink                = br_dev_newlink,
1197         .changelink             = br_changelink,
1198         .dellink                = br_dev_delete,
1199         .get_size               = br_get_size,
1200         .fill_info              = br_fill_info,
1201
1202         .slave_maxtype          = IFLA_BRPORT_MAX,
1203         .slave_policy           = br_port_policy,
1204         .slave_changelink       = br_port_slave_changelink,
1205         .get_slave_size         = br_port_get_slave_size,
1206         .fill_slave_info        = br_port_fill_slave_info,
1207 };
1208
1209 int __init br_netlink_init(void)
1210 {
1211         int err;
1212
1213         br_mdb_init();
1214         rtnl_af_register(&br_af_ops);
1215
1216         err = rtnl_link_register(&br_link_ops);
1217         if (err)
1218                 goto out_af;
1219
1220         return 0;
1221
1222 out_af:
1223         rtnl_af_unregister(&br_af_ops);
1224         br_mdb_uninit();
1225         return err;
1226 }
1227
1228 void br_netlink_fini(void)
1229 {
1230         br_mdb_uninit();
1231         rtnl_af_unregister(&br_af_ops);
1232         rtnl_link_unregister(&br_link_ops);
1233 }