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