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                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_ID */
 135                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_NO */
 136                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
 137                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_CONFIG_PENDING */
 138                 + nla_total_size(sizeof(u64))   /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
 139                 + nla_total_size(sizeof(u64))   /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
 140                 + nla_total_size(sizeof(u64))   /* IFLA_BRPORT_HOLD_TIMER */
 141 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 142                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MULTICAST_ROUTER */
 143 #endif
 144                 + 0;
 145 }
 146
 147 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
 148 {
 149         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
 150                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
 151                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
 152                 + nla_total_size(4) /* IFLA_MASTER */
 153                 + nla_total_size(4) /* IFLA_MTU */
 154                 + nla_total_size(4) /* IFLA_LINK */
 155                 + nla_total_size(1) /* IFLA_OPERSTATE */
 156                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
 157                 + nla_total_size(br_get_link_af_size_filtered(dev,
 158                                  filter_mask)); /* IFLA_AF_SPEC */
 159 }
 160
 161 static int br_port_fill_attrs(struct sk_buff *skb,
 162                               const struct net_bridge_port *p)
 163 {
 164         u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
 165         u64 timerval;
 166
 167         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
 168             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
 169             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
 170             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
 171             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
 172             nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
 173             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
 174             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
 175             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
 176             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
 177             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
 178                        !!(p->flags & BR_PROXYARP_WIFI)) ||
 179             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
 180                     &p->designated_root) ||
 181             nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
 182                     &p->designated_bridge) ||
 183             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
 184             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
 185             nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
 186             nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
 187             nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
 188                        p->topology_change_ack) ||
 189             nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending))
 190                 return -EMSGSIZE;
 191
 192         timerval = br_timer_value(&p->message_age_timer);
 193         if (nla_put_u64(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval))
 194                 return -EMSGSIZE;
 195         timerval = br_timer_value(&p->forward_delay_timer);
 196         if (nla_put_u64(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval))
 197                 return -EMSGSIZE;
 198         timerval = br_timer_value(&p->hold_timer);
 199         if (nla_put_u64(skb, IFLA_BRPORT_HOLD_TIMER, timerval))
 200                 return -EMSGSIZE;
 201
 202 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 203         if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
 204                        p->multicast_router))
 205                 return -EMSGSIZE;
 206 #endif
 207
 208         return 0;
 209 }
 210
 211 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
 212                                     u16 vid_end, u16 flags)
 213 {
 214         struct  bridge_vlan_info vinfo;
 215
 216         if ((vid_end - vid_start) > 0) {
 217                 /* add range to skb */
 218                 vinfo.vid = vid_start;
 219                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
 220                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 221                             sizeof(vinfo), &vinfo))
 222                         goto nla_put_failure;
 223
 224                 vinfo.vid = vid_end;
 225                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
 226                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 227                             sizeof(vinfo), &vinfo))
 228                         goto nla_put_failure;
 229         } else {
 230                 vinfo.vid = vid_start;
 231                 vinfo.flags = flags;
 232                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 233                             sizeof(vinfo), &vinfo))
 234                         goto nla_put_failure;
 235         }
 236
 237         return 0;
 238
 239 nla_put_failure:
 240         return -EMSGSIZE;
 241 }
 242
 243 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
 244                                          struct net_bridge_vlan_group *vg)
 245 {
 246         struct net_bridge_vlan *v;
 247         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 248         u16 flags, pvid;
 249         int err = 0;
 250
 251         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
 252          * and mark vlan info with begin and end flags
 253          * if vlaninfo represents a range
 254          */
 255         pvid = br_get_pvid(vg);
 256         list_for_each_entry(v, &vg->vlan_list, vlist) {
 257                 flags = 0;
 258                 if (!br_vlan_should_use(v))
 259                         continue;
 260                 if (v->vid == pvid)
 261                         flags |= BRIDGE_VLAN_INFO_PVID;
 262
 263                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 264                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 265
 266                 if (vid_range_start == 0) {
 267                         goto initvars;
 268                 } else if ((v->vid - vid_range_end) == 1 &&
 269                         flags == vid_range_flags) {
 270                         vid_range_end = v->vid;
 271                         continue;
 272                 } else {
 273                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 274                                                        vid_range_end,
 275                                                        vid_range_flags);
 276                         if (err)
 277                                 return err;
 278                 }
 279
 280 initvars:
 281                 vid_range_start = v->vid;
 282                 vid_range_end = v->vid;
 283                 vid_range_flags = flags;
 284         }
 285
 286         if (vid_range_start != 0) {
 287                 /* Call it once more to send any left over vlans */
 288                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 289                                                vid_range_end,
 290                                                vid_range_flags);
 291                 if (err)
 292                         return err;
 293         }
 294
 295         return 0;
 296 }
 297
 298 static int br_fill_ifvlaninfo(struct sk_buff *skb,
 299                               struct net_bridge_vlan_group *vg)
 300 {
 301         struct bridge_vlan_info vinfo;
 302         struct net_bridge_vlan *v;
 303         u16 pvid;
 304
 305         pvid = br_get_pvid(vg);
 306         list_for_each_entry(v, &vg->vlan_list, vlist) {
 307                 if (!br_vlan_should_use(v))
 308                         continue;
 309
 310                 vinfo.vid = v->vid;
 311                 vinfo.flags = 0;
 312                 if (v->vid == pvid)
 313                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
 314
 315                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 316                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 317
 318                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 319                             sizeof(vinfo), &vinfo))
 320                         goto nla_put_failure;
 321         }
 322
 323         return 0;
 324
 325 nla_put_failure:
 326         return -EMSGSIZE;
 327 }
 328
 329 /*
 330  * Create one netlink message for one interface
 331  * Contains port and master info as well as carrier and bridge state.
 332  */
 333 static int br_fill_ifinfo(struct sk_buff *skb,
 334                           struct net_bridge_port *port,
 335                           u32 pid, u32 seq, int event, unsigned int flags,
 336                           u32 filter_mask, const struct net_device *dev)
 337 {
 338         struct net_bridge *br;
 339         struct ifinfomsg *hdr;
 340         struct nlmsghdr *nlh;
 341         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
 342
 343         if (port)
 344                 br = port->br;
 345         else
 346                 br = netdev_priv(dev);
 347
 348         br_debug(br, "br_fill_info event %d port %s master %s\n",
 349                      event, dev->name, br->dev->name);
 350
 351         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
 352         if (nlh == NULL)
 353                 return -EMSGSIZE;
 354
 355         hdr = nlmsg_data(nlh);
 356         hdr->ifi_family = AF_BRIDGE;
 357         hdr->__ifi_pad = 0;
 358         hdr->ifi_type = dev->type;
 359         hdr->ifi_index = dev->ifindex;
 360         hdr->ifi_flags = dev_get_flags(dev);
 361         hdr->ifi_change = 0;
 362
 363         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
 364             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
 365             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
 366             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
 367             (dev->addr_len &&
 368              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
 369             (dev->ifindex != dev_get_iflink(dev) &&
 370              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
 371                 goto nla_put_failure;
 372
 373         if (event == RTM_NEWLINK && port) {
 374                 struct nlattr *nest
 375                         = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
 376
 377                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 378                         goto nla_put_failure;
 379                 nla_nest_end(skb, nest);
 380         }
 381
 382         /* Check if  the VID information is requested */
 383         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
 384             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
 385                 struct net_bridge_vlan_group *vg;
 386                 struct nlattr *af;
 387                 int err;
 388
 389                 if (port)
 390                         vg = nbp_vlan_group(port);
 391                 else
 392                         vg = br_vlan_group(br);
 393
 394                 if (!vg || !vg->num_vlans)
 395                         goto done;
 396
 397                 af = nla_nest_start(skb, IFLA_AF_SPEC);
 398                 if (!af)
 399                         goto nla_put_failure;
 400
 401                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 402                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 403                 else
 404                         err = br_fill_ifvlaninfo(skb, vg);
 405                 if (err)
 406                         goto nla_put_failure;
 407                 nla_nest_end(skb, af);
 408         }
 409
 410 done:
 411         nlmsg_end(skb, nlh);
 412         return 0;
 413
 414 nla_put_failure:
 415         nlmsg_cancel(skb, nlh);
 416         return -EMSGSIZE;
 417 }
 418
 419 /*
 420  * Notify listeners of a change in port information
 421  */
 422 void br_ifinfo_notify(int event, struct net_bridge_port *port)
 423 {
 424         struct net *net;
 425         struct sk_buff *skb;
 426         int err = -ENOBUFS;
 427         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 428
 429         if (!port)
 430                 return;
 431
 432         net = dev_net(port->dev);
 433         br_debug(port->br, "port %u(%s) event %d\n",
 434                  (unsigned int)port->port_no, port->dev->name, event);
 435
 436         skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
 437         if (skb == NULL)
 438                 goto errout;
 439
 440         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
 441         if (err < 0) {
 442                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 443                 WARN_ON(err == -EMSGSIZE);
 444                 kfree_skb(skb);
 445                 goto errout;
 446         }
 447         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 448         return;
 449 errout:
 450         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 451 }
 452
 453
 454 /*
 455  * Dump information about all ports, in response to GETLINK
 456  */
 457 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 458                struct net_device *dev, u32 filter_mask, int nlflags)
 459 {
 460         struct net_bridge_port *port = br_port_get_rtnl(dev);
 461
 462         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 463             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
 464                 return 0;
 465
 466         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 467                               filter_mask, dev);
 468 }
 469
 470 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 471                         int cmd, struct bridge_vlan_info *vinfo)
 472 {
 473         int err = 0;
 474
 475         switch (cmd) {
 476         case RTM_SETLINK:
 477                 if (p) {
 478                         /* if the MASTER flag is set this will act on the global
 479                          * per-VLAN entry as well
 480                          */
 481                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
 482                         if (err)
 483                                 break;
 484                 } else {
 485                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 486                         err = br_vlan_add(br, vinfo->vid, vinfo->flags);
 487                 }
 488                 break;
 489
 490         case RTM_DELLINK:
 491                 if (p) {
 492                         nbp_vlan_delete(p, vinfo->vid);
 493                         if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
 494                                 br_vlan_delete(p->br, vinfo->vid);
 495                 } else {
 496                         br_vlan_delete(br, vinfo->vid);
 497                 }
 498                 break;
 499         }
 500
 501         return err;
 502 }
 503
 504 static int br_afspec(struct net_bridge *br,
 505                      struct net_bridge_port *p,
 506                      struct nlattr *af_spec,
 507                      int cmd)
 508 {
 509         struct bridge_vlan_info *vinfo_start = NULL;
 510         struct bridge_vlan_info *vinfo = NULL;
 511         struct nlattr *attr;
 512         int err = 0;
 513         int rem;
 514
 515         nla_for_each_nested(attr, af_spec, rem) {
 516                 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
 517                         continue;
 518                 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 519                         return -EINVAL;
 520                 vinfo = nla_data(attr);
 521                 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
 522                         return -EINVAL;
 523                 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 524                         if (vinfo_start)
 525                                 return -EINVAL;
 526                         vinfo_start = vinfo;
 527                         continue;
 528                 }
 529
 530                 if (vinfo_start) {
 531                         struct bridge_vlan_info tmp_vinfo;
 532                         int v;
 533
 534                         if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
 535                                 return -EINVAL;
 536
 537                         if (vinfo->vid <= vinfo_start->vid)
 538                                 return -EINVAL;
 539
 540                         memcpy(&tmp_vinfo, vinfo_start,
 541                                sizeof(struct bridge_vlan_info));
 542
 543                         for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
 544                                 tmp_vinfo.vid = v;
 545                                 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
 546                                 if (err)
 547                                         break;
 548                         }
 549                         vinfo_start = NULL;
 550                 } else {
 551                         err = br_vlan_info(br, p, cmd, vinfo);
 552                 }
 553                 if (err)
 554                         break;
 555         }
 556
 557         return err;
 558 }
 559
 560 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 561         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 562         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 563         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 564         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 565         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 566         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 567         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 568         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 569         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 570         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 571         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 572         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 573 };
 574
 575 /* Change the state of the port and notify spanning tree */
 576 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 577 {
 578         if (state > BR_STATE_BLOCKING)
 579                 return -EINVAL;
 580
 581         /* if kernel STP is running, don't allow changes */
 582         if (p->br->stp_enabled == BR_KERNEL_STP)
 583                 return -EBUSY;
 584
 585         /* if device is not up, change is not allowed
 586          * if link is not present, only allowable state is disabled
 587          */
 588         if (!netif_running(p->dev) ||
 589             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 590                 return -ENETDOWN;
 591
 592         br_set_state(p, state);
 593         br_log_state(p);
 594         br_port_state_selection(p->br);
 595         return 0;
 596 }
 597
 598 /* Set/clear or port flags based on attribute */
 599 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 600                            int attrtype, unsigned long mask)
 601 {
 602         if (tb[attrtype]) {
 603                 u8 flag = nla_get_u8(tb[attrtype]);
 604                 if (flag)
 605                         p->flags |= mask;
 606                 else
 607                         p->flags &= ~mask;
 608         }
 609 }
 610
 611 /* Process bridge protocol info on port */
 612 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 613 {
 614         int err;
 615         unsigned long old_flags = p->flags;
 616
 617         br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 618         br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 619         br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 620         br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 621         br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 622         br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 623         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 624         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 625
 626         if (tb[IFLA_BRPORT_COST]) {
 627                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 628                 if (err)
 629                         return err;
 630         }
 631
 632         if (tb[IFLA_BRPORT_PRIORITY]) {
 633                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 634                 if (err)
 635                         return err;
 636         }
 637
 638         if (tb[IFLA_BRPORT_STATE]) {
 639                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 640                 if (err)
 641                         return err;
 642         }
 643
 644         if (tb[IFLA_BRPORT_FLUSH])
 645                 br_fdb_delete_by_port(p->br, p, 0, 0);
 646
 647 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 648         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 649                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 650
 651                 err = br_multicast_set_port_router(p, mcast_router);
 652                 if (err)
 653                         return err;
 654         }
 655 #endif
 656         br_port_flags_change(p, old_flags ^ p->flags);
 657         return 0;
 658 }
 659
 660 /* Change state and parameters on port. */
 661 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 662 {
 663         struct nlattr *protinfo;
 664         struct nlattr *afspec;
 665         struct net_bridge_port *p;
 666         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 667         int err = 0;
 668
 669         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 670         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 671         if (!protinfo && !afspec)
 672                 return 0;
 673
 674         p = br_port_get_rtnl(dev);
 675         /* We want to accept dev as bridge itself if the AF_SPEC
 676          * is set to see if someone is setting vlan info on the bridge
 677          */
 678         if (!p && !afspec)
 679                 return -EINVAL;
 680
 681         if (p && protinfo) {
 682                 if (protinfo->nla_type & NLA_F_NESTED) {
 683                         err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
 684                                                protinfo, br_port_policy);
 685                         if (err)
 686                                 return err;
 687
 688                         spin_lock_bh(&p->br->lock);
 689                         err = br_setport(p, tb);
 690                         spin_unlock_bh(&p->br->lock);
 691                 } else {
 692                         /* Binary compatibility with old RSTP */
 693                         if (nla_len(protinfo) < sizeof(u8))
 694                                 return -EINVAL;
 695
 696                         spin_lock_bh(&p->br->lock);
 697                         err = br_set_port_state(p, nla_get_u8(protinfo));
 698                         spin_unlock_bh(&p->br->lock);
 699                 }
 700                 if (err)
 701                         goto out;
 702         }
 703
 704         if (afspec) {
 705                 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 706                                 afspec, RTM_SETLINK);
 707         }
 708
 709         if (err == 0)
 710                 br_ifinfo_notify(RTM_NEWLINK, p);
 711 out:
 712         return err;
 713 }
 714
 715 /* Delete port information */
 716 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 717 {
 718         struct nlattr *afspec;
 719         struct net_bridge_port *p;
 720         int err = 0;
 721
 722         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 723         if (!afspec)
 724                 return 0;
 725
 726         p = br_port_get_rtnl(dev);
 727         /* We want to accept dev as bridge itself as well */
 728         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
 729                 return -EINVAL;
 730
 731         err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 732                         afspec, RTM_DELLINK);
 733         if (err == 0)
 734                 /* Send RTM_NEWLINK because userspace
 735                  * expects RTM_NEWLINK for vlan dels
 736                  */
 737                 br_ifinfo_notify(RTM_NEWLINK, p);
 738
 739         return err;
 740 }
 741 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
 742 {
 743         if (tb[IFLA_ADDRESS]) {
 744                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 745                         return -EINVAL;
 746                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 747                         return -EADDRNOTAVAIL;
 748         }
 749
 750         if (!data)
 751                 return 0;
 752
 753 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 754         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 755                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
 756                 case htons(ETH_P_8021Q):
 757                 case htons(ETH_P_8021AD):
 758                         break;
 759                 default:
 760                         return -EPROTONOSUPPORT;
 761                 }
 762         }
 763 #endif
 764
 765         return 0;
 766 }
 767
 768 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
 769                           struct nlattr *tb[], struct nlattr *data[])
 770 {
 771         struct net_bridge *br = netdev_priv(dev);
 772
 773         if (tb[IFLA_ADDRESS]) {
 774                 spin_lock_bh(&br->lock);
 775                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
 776                 spin_unlock_bh(&br->lock);
 777         }
 778
 779         return register_netdevice(dev);
 780 }
 781
 782 static int br_port_slave_changelink(struct net_device *brdev,
 783                                     struct net_device *dev,
 784                                     struct nlattr *tb[],
 785                                     struct nlattr *data[])
 786 {
 787         struct net_bridge *br = netdev_priv(brdev);
 788         int ret;
 789
 790         if (!data)
 791                 return 0;
 792
 793         spin_lock_bh(&br->lock);
 794         ret = br_setport(br_port_get_rtnl(dev), data);
 795         spin_unlock_bh(&br->lock);
 796
 797         return ret;
 798 }
 799
 800 static int br_port_fill_slave_info(struct sk_buff *skb,
 801                                    const struct net_device *brdev,
 802                                    const struct net_device *dev)
 803 {
 804         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
 805 }
 806
 807 static size_t br_port_get_slave_size(const struct net_device *brdev,
 808                                      const struct net_device *dev)
 809 {
 810         return br_port_info_size();
 811 }
 812
 813 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
 814         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
 815         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
 816         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
 817         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
 818         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
 819         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
 820         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
 821         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
 822         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
 823         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
 824                                  .len  = ETH_ALEN },
 825         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
 826         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
 827         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
 828         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
 829         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
 830         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
 831         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
 832         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
 833         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
 834         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
 835         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
 836         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
 837         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
 838         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
 839         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
 840         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
 841         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
 842         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
 843 };
 844
 845 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
 846                          struct nlattr *data[])
 847 {
 848         struct net_bridge *br = netdev_priv(brdev);
 849         int err;
 850
 851         if (!data)
 852                 return 0;
 853
 854         if (data[IFLA_BR_FORWARD_DELAY]) {
 855                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
 856                 if (err)
 857                         return err;
 858         }
 859
 860         if (data[IFLA_BR_HELLO_TIME]) {
 861                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
 862                 if (err)
 863                         return err;
 864         }
 865
 866         if (data[IFLA_BR_MAX_AGE]) {
 867                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
 868                 if (err)
 869                         return err;
 870         }
 871
 872         if (data[IFLA_BR_AGEING_TIME]) {
 873                 u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]);
 874
 875                 br->ageing_time = clock_t_to_jiffies(ageing_time);
 876         }
 877
 878         if (data[IFLA_BR_STP_STATE]) {
 879                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
 880
 881                 br_stp_set_enabled(br, stp_enabled);
 882         }
 883
 884         if (data[IFLA_BR_PRIORITY]) {
 885                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
 886
 887                 br_stp_set_bridge_priority(br, priority);
 888         }
 889
 890         if (data[IFLA_BR_VLAN_FILTERING]) {
 891                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
 892
 893                 err = __br_vlan_filter_toggle(br, vlan_filter);
 894                 if (err)
 895                         return err;
 896         }
 897
 898 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 899         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 900                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
 901
 902                 err = __br_vlan_set_proto(br, vlan_proto);
 903                 if (err)
 904                         return err;
 905         }
 906
 907         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 908                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 909
 910                 err = __br_vlan_set_default_pvid(br, defpvid);
 911                 if (err)
 912                         return err;
 913         }
 914 #endif
 915
 916         if (data[IFLA_BR_GROUP_FWD_MASK]) {
 917                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
 918
 919                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
 920                         return -EINVAL;
 921                 br->group_fwd_mask = fwd_mask;
 922         }
 923
 924         if (data[IFLA_BR_GROUP_ADDR]) {
 925                 u8 new_addr[ETH_ALEN];
 926
 927                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
 928                         return -EINVAL;
 929                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
 930                 if (!is_link_local_ether_addr(new_addr))
 931                         return -EINVAL;
 932                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
 933                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
 934                     new_addr[5] == 3)           /* 802.1X PAE address */
 935                         return -EINVAL;
 936                 spin_lock_bh(&br->lock);
 937                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
 938                 spin_unlock_bh(&br->lock);
 939                 br->group_addr_set = true;
 940                 br_recalculate_fwd_mask(br);
 941         }
 942
 943         if (data[IFLA_BR_FDB_FLUSH])
 944                 br_fdb_flush(br);
 945
 946 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 947         if (data[IFLA_BR_MCAST_ROUTER]) {
 948                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
 949
 950                 err = br_multicast_set_router(br, multicast_router);
 951                 if (err)
 952                         return err;
 953         }
 954
 955         if (data[IFLA_BR_MCAST_SNOOPING]) {
 956                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
 957
 958                 err = br_multicast_toggle(br, mcast_snooping);
 959                 if (err)
 960                         return err;
 961         }
 962
 963         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
 964                 u8 val;
 965
 966                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
 967                 br->multicast_query_use_ifaddr = !!val;
 968         }
 969
 970         if (data[IFLA_BR_MCAST_QUERIER]) {
 971                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
 972
 973                 err = br_multicast_set_querier(br, mcast_querier);
 974                 if (err)
 975                         return err;
 976         }
 977
 978         if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
 979                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
 980
 981                 br->hash_elasticity = val;
 982         }
 983
 984         if (data[IFLA_BR_MCAST_HASH_MAX]) {
 985                 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
 986
 987                 err = br_multicast_set_hash_max(br, hash_max);
 988                 if (err)
 989                         return err;
 990         }
 991
 992         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
 993                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
 994
 995                 br->multicast_last_member_count = val;
 996         }
 997
 998         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
 999                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1000
1001                 br->multicast_startup_query_count = val;
1002         }
1003
1004         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1005                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1006
1007                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1008         }
1009
1010         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1011                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1012
1013                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1014         }
1015
1016         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1017                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1018
1019                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1020         }
1021
1022         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1023                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1024
1025                 br->multicast_query_interval = clock_t_to_jiffies(val);
1026         }
1027
1028         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1029                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1030
1031                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1032         }
1033
1034         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1035                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1036
1037                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1038         }
1039 #endif
1040 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1041         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1042                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1043
1044                 br->nf_call_iptables = val ? true : false;
1045         }
1046
1047         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1048                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1049
1050                 br->nf_call_ip6tables = val ? true : false;
1051         }
1052
1053         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1054                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1055
1056                 br->nf_call_arptables = val ? true : false;
1057         }
1058 #endif
1059
1060         return 0;
1061 }
1062
1063 static size_t br_get_size(const struct net_device *brdev)
1064 {
1065         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1066                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1067                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1068                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1069                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1070                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1071                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1072 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1073                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1074                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1075 #endif
1076                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1077                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1078                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1079                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1080                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1081                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1082                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1083                nla_total_size(sizeof(u64)) +    /* IFLA_BR_HELLO_TIMER */
1084                nla_total_size(sizeof(u64)) +    /* IFLA_BR_TCN_TIMER */
1085                nla_total_size(sizeof(u64)) +    /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1086                nla_total_size(sizeof(u64)) +    /* IFLA_BR_GC_TIMER */
1087                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1088 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1089                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1090                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1091                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1092                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1093                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1094                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1095                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1096                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1097                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1098                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1099                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERIER_INTVL */
1100                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERY_INTVL */
1101                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1102                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1103 #endif
1104 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1105                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1106                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1107                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1108 #endif
1109                0;
1110 }
1111
1112 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1113 {
1114         struct net_bridge *br = netdev_priv(brdev);
1115         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1116         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1117         u32 age_time = jiffies_to_clock_t(br->max_age);
1118         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1119         u32 stp_enabled = br->stp_enabled;
1120         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1121         u8 vlan_enabled = br_vlan_enabled(br);
1122         u64 clockval;
1123
1124         clockval = br_timer_value(&br->hello_timer);
1125         if (nla_put_u64(skb, IFLA_BR_HELLO_TIMER, clockval))
1126                 return -EMSGSIZE;
1127         clockval = br_timer_value(&br->tcn_timer);
1128         if (nla_put_u64(skb, IFLA_BR_TCN_TIMER, clockval))
1129                 return -EMSGSIZE;
1130         clockval = br_timer_value(&br->topology_change_timer);
1131         if (nla_put_u64(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval))
1132                 return -EMSGSIZE;
1133         clockval = br_timer_value(&br->gc_timer);
1134         if (nla_put_u64(skb, IFLA_BR_GC_TIMER, clockval))
1135                 return -EMSGSIZE;
1136
1137         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1138             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1139             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1140             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1141             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1142             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1143             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1144             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1145             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1146                     &br->bridge_id) ||
1147             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1148                     &br->designated_root) ||
1149             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1150             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1151             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1152             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1153                        br->topology_change_detected) ||
1154             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1155                 return -EMSGSIZE;
1156
1157 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1158         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1159             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid))
1160                 return -EMSGSIZE;
1161 #endif
1162 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1163         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1164             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1165             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1166                        br->multicast_query_use_ifaddr) ||
1167             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1168             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1169                         br->hash_elasticity) ||
1170             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1171             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1172                         br->multicast_last_member_count) ||
1173             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1174                         br->multicast_startup_query_count))
1175                 return -EMSGSIZE;
1176
1177         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1178         if (nla_put_u64(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval))
1179                 return -EMSGSIZE;
1180         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1181         if (nla_put_u64(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval))
1182                 return -EMSGSIZE;
1183         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1184         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval))
1185                 return -EMSGSIZE;
1186         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1187         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval))
1188                 return -EMSGSIZE;
1189         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1190         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval))
1191                 return -EMSGSIZE;
1192         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1193         if (nla_put_u64(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval))
1194                 return -EMSGSIZE;
1195 #endif
1196 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1197         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1198                        br->nf_call_iptables ? 1 : 0) ||
1199             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1200                        br->nf_call_ip6tables ? 1 : 0) ||
1201             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1202                        br->nf_call_arptables ? 1 : 0))
1203                 return -EMSGSIZE;
1204 #endif
1205
1206         return 0;
1207 }
1208
1209 static size_t br_get_link_af_size(const struct net_device *dev)
1210 {
1211         struct net_bridge_port *p;
1212         struct net_bridge *br;
1213         int num_vlans = 0;
1214
1215         if (br_port_exists(dev)) {
1216                 p = br_port_get_rtnl(dev);
1217                 num_vlans = br_get_num_vlan_infos(nbp_vlan_group(p),
1218                                                   RTEXT_FILTER_BRVLAN);
1219         } else if (dev->priv_flags & IFF_EBRIDGE) {
1220                 br = netdev_priv(dev);
1221                 num_vlans = br_get_num_vlan_infos(br_vlan_group(br),
1222                                                   RTEXT_FILTER_BRVLAN);
1223         }
1224
1225         /* Each VLAN is returned in bridge_vlan_info along with flags */
1226         return num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
1227 }
1228
1229 static struct rtnl_af_ops br_af_ops __read_mostly = {
1230         .family                 = AF_BRIDGE,
1231         .get_link_af_size       = br_get_link_af_size,
1232 };
1233
1234 struct rtnl_link_ops br_link_ops __read_mostly = {
1235         .kind                   = "bridge",
1236         .priv_size              = sizeof(struct net_bridge),
1237         .setup                  = br_dev_setup,
1238         .maxtype                = IFLA_BR_MAX,
1239         .policy                 = br_policy,
1240         .validate               = br_validate,
1241         .newlink                = br_dev_newlink,
1242         .changelink             = br_changelink,
1243         .dellink                = br_dev_delete,
1244         .get_size               = br_get_size,
1245         .fill_info              = br_fill_info,
1246
1247         .slave_maxtype          = IFLA_BRPORT_MAX,
1248         .slave_policy           = br_port_policy,
1249         .slave_changelink       = br_port_slave_changelink,
1250         .get_slave_size         = br_port_get_slave_size,
1251         .fill_slave_info        = br_port_fill_slave_info,
1252 };
1253
1254 int __init br_netlink_init(void)
1255 {
1256         int err;
1257
1258         br_mdb_init();
1259         rtnl_af_register(&br_af_ops);
1260
1261         err = rtnl_link_register(&br_link_ops);
1262         if (err)
1263                 goto out_af;
1264
1265         return 0;
1266
1267 out_af:
1268         rtnl_af_unregister(&br_af_ops);
1269         br_mdb_uninit();
1270         return err;
1271 }
1272
1273 void br_netlink_fini(void)
1274 {
1275         br_mdb_uninit();
1276         rtnl_af_unregister(&br_af_ops);
1277         rtnl_link_unregister(&br_link_ops);
1278 }