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_rcu(p);
 106         } else if (dev->priv_flags & IFF_EBRIDGE) {
 107                 br = netdev_priv(dev);
 108                 vg = br_vlan_group_rcu(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_rcu(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_rcu(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                 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
 390                 rcu_read_lock();
 391                 if (port)
 392                         vg = nbp_vlan_group_rcu(port);
 393                 else
 394                         vg = br_vlan_group_rcu(br);
 395
 396                 if (!vg || !vg->num_vlans) {
 397                         rcu_read_unlock();
 398                         goto done;
 399                 }
 400                 af = nla_nest_start(skb, IFLA_AF_SPEC);
 401                 if (!af) {
 402                         rcu_read_unlock();
 403                         goto nla_put_failure;
 404                 }
 405                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 406                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 407                 else
 408                         err = br_fill_ifvlaninfo(skb, vg);
 409                 rcu_read_unlock();
 410                 if (err)
 411                         goto nla_put_failure;
 412                 nla_nest_end(skb, af);
 413         }
 414
 415 done:
 416         nlmsg_end(skb, nlh);
 417         return 0;
 418
 419 nla_put_failure:
 420         nlmsg_cancel(skb, nlh);
 421         return -EMSGSIZE;
 422 }
 423
 424 /*
 425  * Notify listeners of a change in port information
 426  */
 427 void br_ifinfo_notify(int event, struct net_bridge_port *port)
 428 {
 429         struct net *net;
 430         struct sk_buff *skb;
 431         int err = -ENOBUFS;
 432         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 433
 434         if (!port)
 435                 return;
 436
 437         net = dev_net(port->dev);
 438         br_debug(port->br, "port %u(%s) event %d\n",
 439                  (unsigned int)port->port_no, port->dev->name, event);
 440
 441         skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
 442         if (skb == NULL)
 443                 goto errout;
 444
 445         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
 446         if (err < 0) {
 447                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 448                 WARN_ON(err == -EMSGSIZE);
 449                 kfree_skb(skb);
 450                 goto errout;
 451         }
 452         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 453         return;
 454 errout:
 455         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 456 }
 457
 458
 459 /*
 460  * Dump information about all ports, in response to GETLINK
 461  */
 462 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 463                struct net_device *dev, u32 filter_mask, int nlflags)
 464 {
 465         struct net_bridge_port *port = br_port_get_rtnl(dev);
 466
 467         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 468             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
 469                 return 0;
 470
 471         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 472                               filter_mask, dev);
 473 }
 474
 475 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 476                         int cmd, struct bridge_vlan_info *vinfo)
 477 {
 478         int err = 0;
 479
 480         switch (cmd) {
 481         case RTM_SETLINK:
 482                 if (p) {
 483                         /* if the MASTER flag is set this will act on the global
 484                          * per-VLAN entry as well
 485                          */
 486                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
 487                         if (err)
 488                                 break;
 489                 } else {
 490                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 491                         err = br_vlan_add(br, vinfo->vid, vinfo->flags);
 492                 }
 493                 break;
 494
 495         case RTM_DELLINK:
 496                 if (p) {
 497                         nbp_vlan_delete(p, vinfo->vid);
 498                         if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
 499                                 br_vlan_delete(p->br, vinfo->vid);
 500                 } else {
 501                         br_vlan_delete(br, vinfo->vid);
 502                 }
 503                 break;
 504         }
 505
 506         return err;
 507 }
 508
 509 static int br_afspec(struct net_bridge *br,
 510                      struct net_bridge_port *p,
 511                      struct nlattr *af_spec,
 512                      int cmd)
 513 {
 514         struct bridge_vlan_info *vinfo_start = NULL;
 515         struct bridge_vlan_info *vinfo = NULL;
 516         struct nlattr *attr;
 517         int err = 0;
 518         int rem;
 519
 520         nla_for_each_nested(attr, af_spec, rem) {
 521                 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
 522                         continue;
 523                 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 524                         return -EINVAL;
 525                 vinfo = nla_data(attr);
 526                 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
 527                         return -EINVAL;
 528                 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 529                         if (vinfo_start)
 530                                 return -EINVAL;
 531                         vinfo_start = vinfo;
 532                         /* don't allow range of pvids */
 533                         if (vinfo_start->flags & BRIDGE_VLAN_INFO_PVID)
 534                                 return -EINVAL;
 535                         continue;
 536                 }
 537
 538                 if (vinfo_start) {
 539                         struct bridge_vlan_info tmp_vinfo;
 540                         int v;
 541
 542                         if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
 543                                 return -EINVAL;
 544
 545                         if (vinfo->vid <= vinfo_start->vid)
 546                                 return -EINVAL;
 547
 548                         memcpy(&tmp_vinfo, vinfo_start,
 549                                sizeof(struct bridge_vlan_info));
 550
 551                         for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
 552                                 tmp_vinfo.vid = v;
 553                                 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
 554                                 if (err)
 555                                         break;
 556                         }
 557                         vinfo_start = NULL;
 558                 } else {
 559                         err = br_vlan_info(br, p, cmd, vinfo);
 560                 }
 561                 if (err)
 562                         break;
 563         }
 564
 565         return err;
 566 }
 567
 568 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 569         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 570         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 571         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 572         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 573         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 574         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 575         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 576         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 577         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 578         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 579         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 580         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 581 };
 582
 583 /* Change the state of the port and notify spanning tree */
 584 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 585 {
 586         if (state > BR_STATE_BLOCKING)
 587                 return -EINVAL;
 588
 589         /* if kernel STP is running, don't allow changes */
 590         if (p->br->stp_enabled == BR_KERNEL_STP)
 591                 return -EBUSY;
 592
 593         /* if device is not up, change is not allowed
 594          * if link is not present, only allowable state is disabled
 595          */
 596         if (!netif_running(p->dev) ||
 597             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 598                 return -ENETDOWN;
 599
 600         br_set_state(p, state);
 601         br_log_state(p);
 602         br_port_state_selection(p->br);
 603         return 0;
 604 }
 605
 606 /* Set/clear or port flags based on attribute */
 607 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 608                            int attrtype, unsigned long mask)
 609 {
 610         if (tb[attrtype]) {
 611                 u8 flag = nla_get_u8(tb[attrtype]);
 612                 if (flag)
 613                         p->flags |= mask;
 614                 else
 615                         p->flags &= ~mask;
 616         }
 617 }
 618
 619 /* Process bridge protocol info on port */
 620 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 621 {
 622         int err;
 623         unsigned long old_flags = p->flags;
 624
 625         br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 626         br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 627         br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 628         br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 629         br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 630         br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 631         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 632         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 633
 634         if (tb[IFLA_BRPORT_COST]) {
 635                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 636                 if (err)
 637                         return err;
 638         }
 639
 640         if (tb[IFLA_BRPORT_PRIORITY]) {
 641                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 642                 if (err)
 643                         return err;
 644         }
 645
 646         if (tb[IFLA_BRPORT_STATE]) {
 647                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 648                 if (err)
 649                         return err;
 650         }
 651
 652         if (tb[IFLA_BRPORT_FLUSH])
 653                 br_fdb_delete_by_port(p->br, p, 0, 0);
 654
 655 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 656         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 657                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 658
 659                 err = br_multicast_set_port_router(p, mcast_router);
 660                 if (err)
 661                         return err;
 662         }
 663 #endif
 664         br_port_flags_change(p, old_flags ^ p->flags);
 665         return 0;
 666 }
 667
 668 /* Change state and parameters on port. */
 669 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 670 {
 671         struct nlattr *protinfo;
 672         struct nlattr *afspec;
 673         struct net_bridge_port *p;
 674         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 675         int err = 0;
 676
 677         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 678         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 679         if (!protinfo && !afspec)
 680                 return 0;
 681
 682         p = br_port_get_rtnl(dev);
 683         /* We want to accept dev as bridge itself if the AF_SPEC
 684          * is set to see if someone is setting vlan info on the bridge
 685          */
 686         if (!p && !afspec)
 687                 return -EINVAL;
 688
 689         if (p && protinfo) {
 690                 if (protinfo->nla_type & NLA_F_NESTED) {
 691                         err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
 692                                                protinfo, br_port_policy);
 693                         if (err)
 694                                 return err;
 695
 696                         spin_lock_bh(&p->br->lock);
 697                         err = br_setport(p, tb);
 698                         spin_unlock_bh(&p->br->lock);
 699                 } else {
 700                         /* Binary compatibility with old RSTP */
 701                         if (nla_len(protinfo) < sizeof(u8))
 702                                 return -EINVAL;
 703
 704                         spin_lock_bh(&p->br->lock);
 705                         err = br_set_port_state(p, nla_get_u8(protinfo));
 706                         spin_unlock_bh(&p->br->lock);
 707                 }
 708                 if (err)
 709                         goto out;
 710         }
 711
 712         if (afspec) {
 713                 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 714                                 afspec, RTM_SETLINK);
 715         }
 716
 717         if (err == 0)
 718                 br_ifinfo_notify(RTM_NEWLINK, p);
 719 out:
 720         return err;
 721 }
 722
 723 /* Delete port information */
 724 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 725 {
 726         struct nlattr *afspec;
 727         struct net_bridge_port *p;
 728         int err = 0;
 729
 730         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 731         if (!afspec)
 732                 return 0;
 733
 734         p = br_port_get_rtnl(dev);
 735         /* We want to accept dev as bridge itself as well */
 736         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
 737                 return -EINVAL;
 738
 739         err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 740                         afspec, RTM_DELLINK);
 741         if (err == 0)
 742                 /* Send RTM_NEWLINK because userspace
 743                  * expects RTM_NEWLINK for vlan dels
 744                  */
 745                 br_ifinfo_notify(RTM_NEWLINK, p);
 746
 747         return err;
 748 }
 749 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
 750 {
 751         if (tb[IFLA_ADDRESS]) {
 752                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 753                         return -EINVAL;
 754                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 755                         return -EADDRNOTAVAIL;
 756         }
 757
 758         if (!data)
 759                 return 0;
 760
 761 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 762         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 763                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
 764                 case htons(ETH_P_8021Q):
 765                 case htons(ETH_P_8021AD):
 766                         break;
 767                 default:
 768                         return -EPROTONOSUPPORT;
 769                 }
 770         }
 771
 772         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 773                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 774
 775                 if (defpvid >= VLAN_VID_MASK)
 776                         return -EINVAL;
 777         }
 778 #endif
 779
 780         return 0;
 781 }
 782
 783 static int br_port_slave_changelink(struct net_device *brdev,
 784                                     struct net_device *dev,
 785                                     struct nlattr *tb[],
 786                                     struct nlattr *data[])
 787 {
 788         struct net_bridge *br = netdev_priv(brdev);
 789         int ret;
 790
 791         if (!data)
 792                 return 0;
 793
 794         spin_lock_bh(&br->lock);
 795         ret = br_setport(br_port_get_rtnl(dev), data);
 796         spin_unlock_bh(&br->lock);
 797
 798         return ret;
 799 }
 800
 801 static int br_port_fill_slave_info(struct sk_buff *skb,
 802                                    const struct net_device *brdev,
 803                                    const struct net_device *dev)
 804 {
 805         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
 806 }
 807
 808 static size_t br_port_get_slave_size(const struct net_device *brdev,
 809                                      const struct net_device *dev)
 810 {
 811         return br_port_info_size();
 812 }
 813
 814 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
 815         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
 816         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
 817         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
 818         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
 819         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
 820         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
 821         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
 822         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
 823         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
 824         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
 825                                  .len  = ETH_ALEN },
 826         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
 827         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
 828         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
 829         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
 830         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
 831         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
 832         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
 833         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
 834         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
 835         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
 836         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
 837         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
 838         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
 839         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
 840         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
 841         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
 842         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
 843         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
 844 };
 845
 846 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
 847                          struct nlattr *data[])
 848 {
 849         struct net_bridge *br = netdev_priv(brdev);
 850         int err;
 851
 852         if (!data)
 853                 return 0;
 854
 855         if (data[IFLA_BR_FORWARD_DELAY]) {
 856                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
 857                 if (err)
 858                         return err;
 859         }
 860
 861         if (data[IFLA_BR_HELLO_TIME]) {
 862                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
 863                 if (err)
 864                         return err;
 865         }
 866
 867         if (data[IFLA_BR_MAX_AGE]) {
 868                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
 869                 if (err)
 870                         return err;
 871         }
 872
 873         if (data[IFLA_BR_AGEING_TIME]) {
 874                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
 875                 if (err)
 876                         return err;
 877         }
 878
 879         if (data[IFLA_BR_STP_STATE]) {
 880                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
 881
 882                 br_stp_set_enabled(br, stp_enabled);
 883         }
 884
 885         if (data[IFLA_BR_PRIORITY]) {
 886                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
 887
 888                 br_stp_set_bridge_priority(br, priority);
 889         }
 890
 891         if (data[IFLA_BR_VLAN_FILTERING]) {
 892                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
 893
 894                 err = __br_vlan_filter_toggle(br, vlan_filter);
 895                 if (err)
 896                         return err;
 897         }
 898
 899 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 900         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 901                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
 902
 903                 err = __br_vlan_set_proto(br, vlan_proto);
 904                 if (err)
 905                         return err;
 906         }
 907
 908         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 909                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 910
 911                 err = __br_vlan_set_default_pvid(br, defpvid);
 912                 if (err)
 913                         return err;
 914         }
 915 #endif
 916
 917         if (data[IFLA_BR_GROUP_FWD_MASK]) {
 918                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
 919
 920                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
 921                         return -EINVAL;
 922                 br->group_fwd_mask = fwd_mask;
 923         }
 924
 925         if (data[IFLA_BR_GROUP_ADDR]) {
 926                 u8 new_addr[ETH_ALEN];
 927
 928                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
 929                         return -EINVAL;
 930                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
 931                 if (!is_link_local_ether_addr(new_addr))
 932                         return -EINVAL;
 933                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
 934                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
 935                     new_addr[5] == 3)           /* 802.1X PAE address */
 936                         return -EINVAL;
 937                 spin_lock_bh(&br->lock);
 938                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
 939                 spin_unlock_bh(&br->lock);
 940                 br->group_addr_set = true;
 941                 br_recalculate_fwd_mask(br);
 942         }
 943
 944         if (data[IFLA_BR_FDB_FLUSH])
 945                 br_fdb_flush(br);
 946
 947 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 948         if (data[IFLA_BR_MCAST_ROUTER]) {
 949                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
 950
 951                 err = br_multicast_set_router(br, multicast_router);
 952                 if (err)
 953                         return err;
 954         }
 955
 956         if (data[IFLA_BR_MCAST_SNOOPING]) {
 957                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
 958
 959                 err = br_multicast_toggle(br, mcast_snooping);
 960                 if (err)
 961                         return err;
 962         }
 963
 964         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
 965                 u8 val;
 966
 967                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
 968                 br->multicast_query_use_ifaddr = !!val;
 969         }
 970
 971         if (data[IFLA_BR_MCAST_QUERIER]) {
 972                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
 973
 974                 err = br_multicast_set_querier(br, mcast_querier);
 975                 if (err)
 976                         return err;
 977         }
 978
 979         if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
 980                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
 981
 982                 br->hash_elasticity = val;
 983         }
 984
 985         if (data[IFLA_BR_MCAST_HASH_MAX]) {
 986                 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
 987
 988                 err = br_multicast_set_hash_max(br, hash_max);
 989                 if (err)
 990                         return err;
 991         }
 992
 993         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
 994                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
 995
 996                 br->multicast_last_member_count = val;
 997         }
 998
 999         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1000                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1001
1002                 br->multicast_startup_query_count = val;
1003         }
1004
1005         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1006                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1007
1008                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1009         }
1010
1011         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1012                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1013
1014                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1015         }
1016
1017         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1018                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1019
1020                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1021         }
1022
1023         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1024                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1025
1026                 br->multicast_query_interval = clock_t_to_jiffies(val);
1027         }
1028
1029         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1030                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1031
1032                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1033         }
1034
1035         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1036                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1037
1038                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1039         }
1040 #endif
1041 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1042         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1043                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1044
1045                 br->nf_call_iptables = val ? true : false;
1046         }
1047
1048         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1049                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1050
1051                 br->nf_call_ip6tables = val ? true : false;
1052         }
1053
1054         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1055                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1056
1057                 br->nf_call_arptables = val ? true : false;
1058         }
1059 #endif
1060
1061         return 0;
1062 }
1063
1064 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1065                           struct nlattr *tb[], struct nlattr *data[])
1066 {
1067         struct net_bridge *br = netdev_priv(dev);
1068         int err;
1069
1070         err = register_netdevice(dev);
1071         if (err)
1072                 return err;
1073
1074         if (tb[IFLA_ADDRESS]) {
1075                 spin_lock_bh(&br->lock);
1076                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1077                 spin_unlock_bh(&br->lock);
1078         }
1079
1080         err = br_changelink(dev, tb, data);
1081         if (err)
1082                 br_dev_delete(dev, NULL);
1083
1084         return err;
1085 }
1086
1087 static size_t br_get_size(const struct net_device *brdev)
1088 {
1089         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1090                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1091                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1092                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1093                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1094                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1095                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1096 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1097                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1098                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1099 #endif
1100                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1101                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1102                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1103                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1104                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1105                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1106                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1107                nla_total_size(sizeof(u64)) +    /* IFLA_BR_HELLO_TIMER */
1108                nla_total_size(sizeof(u64)) +    /* IFLA_BR_TCN_TIMER */
1109                nla_total_size(sizeof(u64)) +    /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1110                nla_total_size(sizeof(u64)) +    /* IFLA_BR_GC_TIMER */
1111                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1112 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1113                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1114                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1115                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1116                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1117                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1118                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1119                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1120                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1121                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1122                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1123                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERIER_INTVL */
1124                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERY_INTVL */
1125                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1126                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1127 #endif
1128 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1129                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1130                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1131                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1132 #endif
1133                0;
1134 }
1135
1136 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1137 {
1138         struct net_bridge *br = netdev_priv(brdev);
1139         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1140         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1141         u32 age_time = jiffies_to_clock_t(br->max_age);
1142         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1143         u32 stp_enabled = br->stp_enabled;
1144         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1145         u8 vlan_enabled = br_vlan_enabled(br);
1146         u64 clockval;
1147
1148         clockval = br_timer_value(&br->hello_timer);
1149         if (nla_put_u64(skb, IFLA_BR_HELLO_TIMER, clockval))
1150                 return -EMSGSIZE;
1151         clockval = br_timer_value(&br->tcn_timer);
1152         if (nla_put_u64(skb, IFLA_BR_TCN_TIMER, clockval))
1153                 return -EMSGSIZE;
1154         clockval = br_timer_value(&br->topology_change_timer);
1155         if (nla_put_u64(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval))
1156                 return -EMSGSIZE;
1157         clockval = br_timer_value(&br->gc_timer);
1158         if (nla_put_u64(skb, IFLA_BR_GC_TIMER, clockval))
1159                 return -EMSGSIZE;
1160
1161         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1162             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1163             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1164             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1165             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1166             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1167             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1168             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1169             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1170                     &br->bridge_id) ||
1171             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1172                     &br->designated_root) ||
1173             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1174             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1175             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1176             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1177                        br->topology_change_detected) ||
1178             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1179                 return -EMSGSIZE;
1180
1181 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1182         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1183             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid))
1184                 return -EMSGSIZE;
1185 #endif
1186 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1187         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1188             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1189             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1190                        br->multicast_query_use_ifaddr) ||
1191             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1192             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1193                         br->hash_elasticity) ||
1194             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1195             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1196                         br->multicast_last_member_count) ||
1197             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1198                         br->multicast_startup_query_count))
1199                 return -EMSGSIZE;
1200
1201         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1202         if (nla_put_u64(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval))
1203                 return -EMSGSIZE;
1204         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1205         if (nla_put_u64(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval))
1206                 return -EMSGSIZE;
1207         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1208         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval))
1209                 return -EMSGSIZE;
1210         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1211         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval))
1212                 return -EMSGSIZE;
1213         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1214         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval))
1215                 return -EMSGSIZE;
1216         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1217         if (nla_put_u64(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval))
1218                 return -EMSGSIZE;
1219 #endif
1220 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1221         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1222                        br->nf_call_iptables ? 1 : 0) ||
1223             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1224                        br->nf_call_ip6tables ? 1 : 0) ||
1225             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1226                        br->nf_call_arptables ? 1 : 0))
1227                 return -EMSGSIZE;
1228 #endif
1229
1230         return 0;
1231 }
1232
1233
1234 static struct rtnl_af_ops br_af_ops __read_mostly = {
1235         .family                 = AF_BRIDGE,
1236         .get_link_af_size       = br_get_link_af_size_filtered,
1237 };
1238
1239 struct rtnl_link_ops br_link_ops __read_mostly = {
1240         .kind                   = "bridge",
1241         .priv_size              = sizeof(struct net_bridge),
1242         .setup                  = br_dev_setup,
1243         .maxtype                = IFLA_BR_MAX,
1244         .policy                 = br_policy,
1245         .validate               = br_validate,
1246         .newlink                = br_dev_newlink,
1247         .changelink             = br_changelink,
1248         .dellink                = br_dev_delete,
1249         .get_size               = br_get_size,
1250         .fill_info              = br_fill_info,
1251
1252         .slave_maxtype          = IFLA_BRPORT_MAX,
1253         .slave_policy           = br_port_policy,
1254         .slave_changelink       = br_port_slave_changelink,
1255         .get_slave_size         = br_port_get_slave_size,
1256         .fill_slave_info        = br_port_fill_slave_info,
1257 };
1258
1259 int __init br_netlink_init(void)
1260 {
1261         int err;
1262
1263         br_mdb_init();
1264         rtnl_af_register(&br_af_ops);
1265
1266         err = rtnl_link_register(&br_link_ops);
1267         if (err)
1268                 goto out_af;
1269
1270         return 0;
1271
1272 out_af:
1273         rtnl_af_unregister(&br_af_ops);
1274         br_mdb_uninit();
1275         return err;
1276 }
1277
1278 void br_netlink_fini(void)
1279 {
1280         br_mdb_uninit();
1281         rtnl_af_unregister(&br_af_ops);
1282         rtnl_link_unregister(&br_link_ops);
1283 }