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_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
 139                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
 140                 + nla_total_size_64bit(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_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
 194                               IFLA_BRPORT_PAD))
 195                 return -EMSGSIZE;
 196         timerval = br_timer_value(&p->forward_delay_timer);
 197         if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
 198                               IFLA_BRPORT_PAD))
 199                 return -EMSGSIZE;
 200         timerval = br_timer_value(&p->hold_timer);
 201         if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
 202                               IFLA_BRPORT_PAD))
 203                 return -EMSGSIZE;
 204
 205 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 206         if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
 207                        p->multicast_router))
 208                 return -EMSGSIZE;
 209 #endif
 210
 211         return 0;
 212 }
 213
 214 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
 215                                     u16 vid_end, u16 flags)
 216 {
 217         struct  bridge_vlan_info vinfo;
 218
 219         if ((vid_end - vid_start) > 0) {
 220                 /* add range to skb */
 221                 vinfo.vid = vid_start;
 222                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
 223                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 224                             sizeof(vinfo), &vinfo))
 225                         goto nla_put_failure;
 226
 227                 vinfo.vid = vid_end;
 228                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
 229                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 230                             sizeof(vinfo), &vinfo))
 231                         goto nla_put_failure;
 232         } else {
 233                 vinfo.vid = vid_start;
 234                 vinfo.flags = flags;
 235                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 236                             sizeof(vinfo), &vinfo))
 237                         goto nla_put_failure;
 238         }
 239
 240         return 0;
 241
 242 nla_put_failure:
 243         return -EMSGSIZE;
 244 }
 245
 246 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
 247                                          struct net_bridge_vlan_group *vg)
 248 {
 249         struct net_bridge_vlan *v;
 250         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 251         u16 flags, pvid;
 252         int err = 0;
 253
 254         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
 255          * and mark vlan info with begin and end flags
 256          * if vlaninfo represents a range
 257          */
 258         pvid = br_get_pvid(vg);
 259         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 260                 flags = 0;
 261                 if (!br_vlan_should_use(v))
 262                         continue;
 263                 if (v->vid == pvid)
 264                         flags |= BRIDGE_VLAN_INFO_PVID;
 265
 266                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 267                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 268
 269                 if (vid_range_start == 0) {
 270                         goto initvars;
 271                 } else if ((v->vid - vid_range_end) == 1 &&
 272                         flags == vid_range_flags) {
 273                         vid_range_end = v->vid;
 274                         continue;
 275                 } else {
 276                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 277                                                        vid_range_end,
 278                                                        vid_range_flags);
 279                         if (err)
 280                                 return err;
 281                 }
 282
 283 initvars:
 284                 vid_range_start = v->vid;
 285                 vid_range_end = v->vid;
 286                 vid_range_flags = flags;
 287         }
 288
 289         if (vid_range_start != 0) {
 290                 /* Call it once more to send any left over vlans */
 291                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 292                                                vid_range_end,
 293                                                vid_range_flags);
 294                 if (err)
 295                         return err;
 296         }
 297
 298         return 0;
 299 }
 300
 301 static int br_fill_ifvlaninfo(struct sk_buff *skb,
 302                               struct net_bridge_vlan_group *vg)
 303 {
 304         struct bridge_vlan_info vinfo;
 305         struct net_bridge_vlan *v;
 306         u16 pvid;
 307
 308         pvid = br_get_pvid(vg);
 309         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 310                 if (!br_vlan_should_use(v))
 311                         continue;
 312
 313                 vinfo.vid = v->vid;
 314                 vinfo.flags = 0;
 315                 if (v->vid == pvid)
 316                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
 317
 318                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 319                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 320
 321                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 322                             sizeof(vinfo), &vinfo))
 323                         goto nla_put_failure;
 324         }
 325
 326         return 0;
 327
 328 nla_put_failure:
 329         return -EMSGSIZE;
 330 }
 331
 332 /*
 333  * Create one netlink message for one interface
 334  * Contains port and master info as well as carrier and bridge state.
 335  */
 336 static int br_fill_ifinfo(struct sk_buff *skb,
 337                           struct net_bridge_port *port,
 338                           u32 pid, u32 seq, int event, unsigned int flags,
 339                           u32 filter_mask, const struct net_device *dev)
 340 {
 341         struct net_bridge *br;
 342         struct ifinfomsg *hdr;
 343         struct nlmsghdr *nlh;
 344         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
 345
 346         if (port)
 347                 br = port->br;
 348         else
 349                 br = netdev_priv(dev);
 350
 351         br_debug(br, "br_fill_info event %d port %s master %s\n",
 352                      event, dev->name, br->dev->name);
 353
 354         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
 355         if (nlh == NULL)
 356                 return -EMSGSIZE;
 357
 358         hdr = nlmsg_data(nlh);
 359         hdr->ifi_family = AF_BRIDGE;
 360         hdr->__ifi_pad = 0;
 361         hdr->ifi_type = dev->type;
 362         hdr->ifi_index = dev->ifindex;
 363         hdr->ifi_flags = dev_get_flags(dev);
 364         hdr->ifi_change = 0;
 365
 366         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
 367             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
 368             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
 369             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
 370             (dev->addr_len &&
 371              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
 372             (dev->ifindex != dev_get_iflink(dev) &&
 373              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
 374                 goto nla_put_failure;
 375
 376         if (event == RTM_NEWLINK && port) {
 377                 struct nlattr *nest
 378                         = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
 379
 380                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 381                         goto nla_put_failure;
 382                 nla_nest_end(skb, nest);
 383         }
 384
 385         /* Check if  the VID information is requested */
 386         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
 387             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
 388                 struct net_bridge_vlan_group *vg;
 389                 struct nlattr *af;
 390                 int err;
 391
 392                 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
 393                 rcu_read_lock();
 394                 if (port)
 395                         vg = nbp_vlan_group_rcu(port);
 396                 else
 397                         vg = br_vlan_group_rcu(br);
 398
 399                 if (!vg || !vg->num_vlans) {
 400                         rcu_read_unlock();
 401                         goto done;
 402                 }
 403                 af = nla_nest_start(skb, IFLA_AF_SPEC);
 404                 if (!af) {
 405                         rcu_read_unlock();
 406                         goto nla_put_failure;
 407                 }
 408                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 409                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 410                 else
 411                         err = br_fill_ifvlaninfo(skb, vg);
 412                 rcu_read_unlock();
 413                 if (err)
 414                         goto nla_put_failure;
 415                 nla_nest_end(skb, af);
 416         }
 417
 418 done:
 419         nlmsg_end(skb, nlh);
 420         return 0;
 421
 422 nla_put_failure:
 423         nlmsg_cancel(skb, nlh);
 424         return -EMSGSIZE;
 425 }
 426
 427 /*
 428  * Notify listeners of a change in port information
 429  */
 430 void br_ifinfo_notify(int event, struct net_bridge_port *port)
 431 {
 432         struct net *net;
 433         struct sk_buff *skb;
 434         int err = -ENOBUFS;
 435         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 436
 437         if (!port)
 438                 return;
 439
 440         net = dev_net(port->dev);
 441         br_debug(port->br, "port %u(%s) event %d\n",
 442                  (unsigned int)port->port_no, port->dev->name, event);
 443
 444         skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
 445         if (skb == NULL)
 446                 goto errout;
 447
 448         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
 449         if (err < 0) {
 450                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 451                 WARN_ON(err == -EMSGSIZE);
 452                 kfree_skb(skb);
 453                 goto errout;
 454         }
 455         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 456         return;
 457 errout:
 458         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 459 }
 460
 461
 462 /*
 463  * Dump information about all ports, in response to GETLINK
 464  */
 465 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 466                struct net_device *dev, u32 filter_mask, int nlflags)
 467 {
 468         struct net_bridge_port *port = br_port_get_rtnl(dev);
 469
 470         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 471             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
 472                 return 0;
 473
 474         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 475                               filter_mask, dev);
 476 }
 477
 478 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 479                         int cmd, struct bridge_vlan_info *vinfo)
 480 {
 481         int err = 0;
 482
 483         switch (cmd) {
 484         case RTM_SETLINK:
 485                 if (p) {
 486                         /* if the MASTER flag is set this will act on the global
 487                          * per-VLAN entry as well
 488                          */
 489                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
 490                         if (err)
 491                                 break;
 492                 } else {
 493                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 494                         err = br_vlan_add(br, vinfo->vid, vinfo->flags);
 495                 }
 496                 break;
 497
 498         case RTM_DELLINK:
 499                 if (p) {
 500                         nbp_vlan_delete(p, vinfo->vid);
 501                         if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
 502                                 br_vlan_delete(p->br, vinfo->vid);
 503                 } else {
 504                         br_vlan_delete(br, vinfo->vid);
 505                 }
 506                 break;
 507         }
 508
 509         return err;
 510 }
 511
 512 static int br_afspec(struct net_bridge *br,
 513                      struct net_bridge_port *p,
 514                      struct nlattr *af_spec,
 515                      int cmd)
 516 {
 517         struct bridge_vlan_info *vinfo_start = NULL;
 518         struct bridge_vlan_info *vinfo = NULL;
 519         struct nlattr *attr;
 520         int err = 0;
 521         int rem;
 522
 523         nla_for_each_nested(attr, af_spec, rem) {
 524                 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
 525                         continue;
 526                 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 527                         return -EINVAL;
 528                 vinfo = nla_data(attr);
 529                 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
 530                         return -EINVAL;
 531                 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 532                         if (vinfo_start)
 533                                 return -EINVAL;
 534                         vinfo_start = vinfo;
 535                         /* don't allow range of pvids */
 536                         if (vinfo_start->flags & BRIDGE_VLAN_INFO_PVID)
 537                                 return -EINVAL;
 538                         continue;
 539                 }
 540
 541                 if (vinfo_start) {
 542                         struct bridge_vlan_info tmp_vinfo;
 543                         int v;
 544
 545                         if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
 546                                 return -EINVAL;
 547
 548                         if (vinfo->vid <= vinfo_start->vid)
 549                                 return -EINVAL;
 550
 551                         memcpy(&tmp_vinfo, vinfo_start,
 552                                sizeof(struct bridge_vlan_info));
 553
 554                         for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
 555                                 tmp_vinfo.vid = v;
 556                                 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
 557                                 if (err)
 558                                         break;
 559                         }
 560                         vinfo_start = NULL;
 561                 } else {
 562                         err = br_vlan_info(br, p, cmd, vinfo);
 563                 }
 564                 if (err)
 565                         break;
 566         }
 567
 568         return err;
 569 }
 570
 571 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 572         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 573         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 574         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 575         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 576         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 577         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 578         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 579         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 580         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 581         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 582         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 583         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 584 };
 585
 586 /* Change the state of the port and notify spanning tree */
 587 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 588 {
 589         if (state > BR_STATE_BLOCKING)
 590                 return -EINVAL;
 591
 592         /* if kernel STP is running, don't allow changes */
 593         if (p->br->stp_enabled == BR_KERNEL_STP)
 594                 return -EBUSY;
 595
 596         /* if device is not up, change is not allowed
 597          * if link is not present, only allowable state is disabled
 598          */
 599         if (!netif_running(p->dev) ||
 600             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 601                 return -ENETDOWN;
 602
 603         br_set_state(p, state);
 604         br_port_state_selection(p->br);
 605         return 0;
 606 }
 607
 608 /* Set/clear or port flags based on attribute */
 609 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 610                            int attrtype, unsigned long mask)
 611 {
 612         if (tb[attrtype]) {
 613                 u8 flag = nla_get_u8(tb[attrtype]);
 614                 if (flag)
 615                         p->flags |= mask;
 616                 else
 617                         p->flags &= ~mask;
 618         }
 619 }
 620
 621 /* Process bridge protocol info on port */
 622 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 623 {
 624         int err;
 625         unsigned long old_flags = p->flags;
 626
 627         br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 628         br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 629         br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 630         br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 631         br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 632         br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 633         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 634         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 635
 636         if (tb[IFLA_BRPORT_COST]) {
 637                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 638                 if (err)
 639                         return err;
 640         }
 641
 642         if (tb[IFLA_BRPORT_PRIORITY]) {
 643                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 644                 if (err)
 645                         return err;
 646         }
 647
 648         if (tb[IFLA_BRPORT_STATE]) {
 649                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 650                 if (err)
 651                         return err;
 652         }
 653
 654         if (tb[IFLA_BRPORT_FLUSH])
 655                 br_fdb_delete_by_port(p->br, p, 0, 0);
 656
 657 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 658         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 659                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 660
 661                 err = br_multicast_set_port_router(p, mcast_router);
 662                 if (err)
 663                         return err;
 664         }
 665 #endif
 666         br_port_flags_change(p, old_flags ^ p->flags);
 667         return 0;
 668 }
 669
 670 /* Change state and parameters on port. */
 671 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 672 {
 673         struct nlattr *protinfo;
 674         struct nlattr *afspec;
 675         struct net_bridge_port *p;
 676         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 677         int err = 0;
 678
 679         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 680         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 681         if (!protinfo && !afspec)
 682                 return 0;
 683
 684         p = br_port_get_rtnl(dev);
 685         /* We want to accept dev as bridge itself if the AF_SPEC
 686          * is set to see if someone is setting vlan info on the bridge
 687          */
 688         if (!p && !afspec)
 689                 return -EINVAL;
 690
 691         if (p && protinfo) {
 692                 if (protinfo->nla_type & NLA_F_NESTED) {
 693                         err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
 694                                                protinfo, br_port_policy);
 695                         if (err)
 696                                 return err;
 697
 698                         spin_lock_bh(&p->br->lock);
 699                         err = br_setport(p, tb);
 700                         spin_unlock_bh(&p->br->lock);
 701                 } else {
 702                         /* Binary compatibility with old RSTP */
 703                         if (nla_len(protinfo) < sizeof(u8))
 704                                 return -EINVAL;
 705
 706                         spin_lock_bh(&p->br->lock);
 707                         err = br_set_port_state(p, nla_get_u8(protinfo));
 708                         spin_unlock_bh(&p->br->lock);
 709                 }
 710                 if (err)
 711                         goto out;
 712         }
 713
 714         if (afspec) {
 715                 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 716                                 afspec, RTM_SETLINK);
 717         }
 718
 719         if (err == 0)
 720                 br_ifinfo_notify(RTM_NEWLINK, p);
 721 out:
 722         return err;
 723 }
 724
 725 /* Delete port information */
 726 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 727 {
 728         struct nlattr *afspec;
 729         struct net_bridge_port *p;
 730         int err = 0;
 731
 732         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 733         if (!afspec)
 734                 return 0;
 735
 736         p = br_port_get_rtnl(dev);
 737         /* We want to accept dev as bridge itself as well */
 738         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
 739                 return -EINVAL;
 740
 741         err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 742                         afspec, RTM_DELLINK);
 743         if (err == 0)
 744                 /* Send RTM_NEWLINK because userspace
 745                  * expects RTM_NEWLINK for vlan dels
 746                  */
 747                 br_ifinfo_notify(RTM_NEWLINK, p);
 748
 749         return err;
 750 }
 751 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
 752 {
 753         if (tb[IFLA_ADDRESS]) {
 754                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 755                         return -EINVAL;
 756                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 757                         return -EADDRNOTAVAIL;
 758         }
 759
 760         if (!data)
 761                 return 0;
 762
 763 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 764         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 765                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
 766                 case htons(ETH_P_8021Q):
 767                 case htons(ETH_P_8021AD):
 768                         break;
 769                 default:
 770                         return -EPROTONOSUPPORT;
 771                 }
 772         }
 773 #endif
 774
 775         return 0;
 776 }
 777
 778 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
 779                           struct nlattr *tb[], struct nlattr *data[])
 780 {
 781         struct net_bridge *br = netdev_priv(dev);
 782
 783         if (tb[IFLA_ADDRESS]) {
 784                 spin_lock_bh(&br->lock);
 785                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
 786                 spin_unlock_bh(&br->lock);
 787         }
 788
 789         return register_netdevice(dev);
 790 }
 791
 792 static int br_port_slave_changelink(struct net_device *brdev,
 793                                     struct net_device *dev,
 794                                     struct nlattr *tb[],
 795                                     struct nlattr *data[])
 796 {
 797         struct net_bridge *br = netdev_priv(brdev);
 798         int ret;
 799
 800         if (!data)
 801                 return 0;
 802
 803         spin_lock_bh(&br->lock);
 804         ret = br_setport(br_port_get_rtnl(dev), data);
 805         spin_unlock_bh(&br->lock);
 806
 807         return ret;
 808 }
 809
 810 static int br_port_fill_slave_info(struct sk_buff *skb,
 811                                    const struct net_device *brdev,
 812                                    const struct net_device *dev)
 813 {
 814         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
 815 }
 816
 817 static size_t br_port_get_slave_size(const struct net_device *brdev,
 818                                      const struct net_device *dev)
 819 {
 820         return br_port_info_size();
 821 }
 822
 823 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
 824         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
 825         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
 826         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
 827         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
 828         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
 829         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
 830         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
 831         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
 832         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
 833         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
 834                                  .len  = ETH_ALEN },
 835         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
 836         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
 837         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
 838         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
 839         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
 840         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
 841         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
 842         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
 843         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
 844         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
 845         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
 846         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
 847         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
 848         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
 849         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
 850         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
 851         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
 852         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
 853         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
 854 };
 855
 856 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
 857                          struct nlattr *data[])
 858 {
 859         struct net_bridge *br = netdev_priv(brdev);
 860         int err;
 861
 862         if (!data)
 863                 return 0;
 864
 865         if (data[IFLA_BR_FORWARD_DELAY]) {
 866                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
 867                 if (err)
 868                         return err;
 869         }
 870
 871         if (data[IFLA_BR_HELLO_TIME]) {
 872                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
 873                 if (err)
 874                         return err;
 875         }
 876
 877         if (data[IFLA_BR_MAX_AGE]) {
 878                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
 879                 if (err)
 880                         return err;
 881         }
 882
 883         if (data[IFLA_BR_AGEING_TIME]) {
 884                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
 885                 if (err)
 886                         return err;
 887         }
 888
 889         if (data[IFLA_BR_STP_STATE]) {
 890                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
 891
 892                 br_stp_set_enabled(br, stp_enabled);
 893         }
 894
 895         if (data[IFLA_BR_PRIORITY]) {
 896                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
 897
 898                 br_stp_set_bridge_priority(br, priority);
 899         }
 900
 901         if (data[IFLA_BR_VLAN_FILTERING]) {
 902                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
 903
 904                 err = __br_vlan_filter_toggle(br, vlan_filter);
 905                 if (err)
 906                         return err;
 907         }
 908
 909 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 910         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 911                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
 912
 913                 err = __br_vlan_set_proto(br, vlan_proto);
 914                 if (err)
 915                         return err;
 916         }
 917
 918         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 919                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 920
 921                 err = __br_vlan_set_default_pvid(br, defpvid);
 922                 if (err)
 923                         return err;
 924         }
 925
 926         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
 927                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
 928
 929                 err = br_vlan_set_stats(br, vlan_stats);
 930                 if (err)
 931                         return err;
 932         }
 933 #endif
 934
 935         if (data[IFLA_BR_GROUP_FWD_MASK]) {
 936                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
 937
 938                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
 939                         return -EINVAL;
 940                 br->group_fwd_mask = fwd_mask;
 941         }
 942
 943         if (data[IFLA_BR_GROUP_ADDR]) {
 944                 u8 new_addr[ETH_ALEN];
 945
 946                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
 947                         return -EINVAL;
 948                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
 949                 if (!is_link_local_ether_addr(new_addr))
 950                         return -EINVAL;
 951                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
 952                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
 953                     new_addr[5] == 3)           /* 802.1X PAE address */
 954                         return -EINVAL;
 955                 spin_lock_bh(&br->lock);
 956                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
 957                 spin_unlock_bh(&br->lock);
 958                 br->group_addr_set = true;
 959                 br_recalculate_fwd_mask(br);
 960         }
 961
 962         if (data[IFLA_BR_FDB_FLUSH])
 963                 br_fdb_flush(br);
 964
 965 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 966         if (data[IFLA_BR_MCAST_ROUTER]) {
 967                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
 968
 969                 err = br_multicast_set_router(br, multicast_router);
 970                 if (err)
 971                         return err;
 972         }
 973
 974         if (data[IFLA_BR_MCAST_SNOOPING]) {
 975                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
 976
 977                 err = br_multicast_toggle(br, mcast_snooping);
 978                 if (err)
 979                         return err;
 980         }
 981
 982         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
 983                 u8 val;
 984
 985                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
 986                 br->multicast_query_use_ifaddr = !!val;
 987         }
 988
 989         if (data[IFLA_BR_MCAST_QUERIER]) {
 990                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
 991
 992                 err = br_multicast_set_querier(br, mcast_querier);
 993                 if (err)
 994                         return err;
 995         }
 996
 997         if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
 998                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
 999
1000                 br->hash_elasticity = val;
1001         }
1002
1003         if (data[IFLA_BR_MCAST_HASH_MAX]) {
1004                 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1005
1006                 err = br_multicast_set_hash_max(br, hash_max);
1007                 if (err)
1008                         return err;
1009         }
1010
1011         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1012                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1013
1014                 br->multicast_last_member_count = val;
1015         }
1016
1017         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1018                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1019
1020                 br->multicast_startup_query_count = val;
1021         }
1022
1023         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1024                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1025
1026                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1027         }
1028
1029         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1030                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1031
1032                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1033         }
1034
1035         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1036                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1037
1038                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1039         }
1040
1041         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1042                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1043
1044                 br->multicast_query_interval = clock_t_to_jiffies(val);
1045         }
1046
1047         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1048                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1049
1050                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1051         }
1052
1053         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1054                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1055
1056                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1057         }
1058 #endif
1059 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1060         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1061                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1062
1063                 br->nf_call_iptables = val ? true : false;
1064         }
1065
1066         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1067                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1068
1069                 br->nf_call_ip6tables = val ? true : false;
1070         }
1071
1072         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1073                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1074
1075                 br->nf_call_arptables = val ? true : false;
1076         }
1077 #endif
1078
1079         return 0;
1080 }
1081
1082 static size_t br_get_size(const struct net_device *brdev)
1083 {
1084         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1085                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1086                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1087                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1088                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1089                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1090                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1091 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1092                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1093                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1094                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1095 #endif
1096                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1097                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1098                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1099                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1100                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1101                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1102                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1103                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1104                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1105                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1106                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1107                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1108 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1109                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1110                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1111                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1112                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1113                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1114                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1115                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1116                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1117                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1118                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1119                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1120                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1121                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1122                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1123 #endif
1124 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1125                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1126                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1127                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1128 #endif
1129                0;
1130 }
1131
1132 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1133 {
1134         struct net_bridge *br = netdev_priv(brdev);
1135         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1136         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1137         u32 age_time = jiffies_to_clock_t(br->max_age);
1138         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1139         u32 stp_enabled = br->stp_enabled;
1140         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1141         u8 vlan_enabled = br_vlan_enabled(br);
1142         u64 clockval;
1143
1144         clockval = br_timer_value(&br->hello_timer);
1145         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1146                 return -EMSGSIZE;
1147         clockval = br_timer_value(&br->tcn_timer);
1148         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1149                 return -EMSGSIZE;
1150         clockval = br_timer_value(&br->topology_change_timer);
1151         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1152                               IFLA_BR_PAD))
1153                 return -EMSGSIZE;
1154         clockval = br_timer_value(&br->gc_timer);
1155         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1156                 return -EMSGSIZE;
1157
1158         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1159             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1160             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1161             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1162             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1163             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1164             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1165             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1166             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1167                     &br->bridge_id) ||
1168             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1169                     &br->designated_root) ||
1170             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1171             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1172             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1173             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1174                        br->topology_change_detected) ||
1175             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1176                 return -EMSGSIZE;
1177
1178 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1179         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1180             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1181             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled))
1182                 return -EMSGSIZE;
1183 #endif
1184 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1185         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1186             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1187             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1188                        br->multicast_query_use_ifaddr) ||
1189             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1190             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1191                         br->hash_elasticity) ||
1192             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1193             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1194                         br->multicast_last_member_count) ||
1195             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1196                         br->multicast_startup_query_count))
1197                 return -EMSGSIZE;
1198
1199         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1200         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1201                               IFLA_BR_PAD))
1202                 return -EMSGSIZE;
1203         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1204         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1205                               IFLA_BR_PAD))
1206                 return -EMSGSIZE;
1207         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1208         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1209                               IFLA_BR_PAD))
1210                 return -EMSGSIZE;
1211         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1212         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1213                               IFLA_BR_PAD))
1214                 return -EMSGSIZE;
1215         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1216         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1217                               IFLA_BR_PAD))
1218                 return -EMSGSIZE;
1219         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1220         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1221                               IFLA_BR_PAD))
1222                 return -EMSGSIZE;
1223 #endif
1224 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1225         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1226                        br->nf_call_iptables ? 1 : 0) ||
1227             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1228                        br->nf_call_ip6tables ? 1 : 0) ||
1229             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1230                        br->nf_call_arptables ? 1 : 0))
1231                 return -EMSGSIZE;
1232 #endif
1233
1234         return 0;
1235 }
1236
1237 static size_t br_get_linkxstats_size(const struct net_device *dev)
1238 {
1239         struct net_bridge *br = netdev_priv(dev);
1240         struct net_bridge_vlan_group *vg;
1241         struct net_bridge_vlan *v;
1242         int numvls = 0;
1243
1244         vg = br_vlan_group(br);
1245         if (!vg)
1246                 return 0;
1247
1248         /* we need to count all, even placeholder entries */
1249         list_for_each_entry(v, &vg->vlan_list, vlist)
1250                 numvls++;
1251
1252         /* account for the vlans and the link xstats type nest attribute */
1253         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1254                nla_total_size(0);
1255 }
1256
1257 static int br_fill_linkxstats(struct sk_buff *skb, const struct net_device *dev,
1258                               int *prividx)
1259 {
1260         struct net_bridge *br = netdev_priv(dev);
1261         struct net_bridge_vlan_group *vg;
1262         struct net_bridge_vlan *v;
1263         struct nlattr *nest;
1264         int vl_idx = 0;
1265
1266         vg = br_vlan_group(br);
1267         if (!vg)
1268                 goto out;
1269         nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE);
1270         if (!nest)
1271                 return -EMSGSIZE;
1272         list_for_each_entry(v, &vg->vlan_list, vlist) {
1273                 struct bridge_vlan_xstats vxi;
1274                 struct br_vlan_stats stats;
1275
1276                 if (vl_idx++ < *prividx)
1277                         continue;
1278                 memset(&vxi, 0, sizeof(vxi));
1279                 vxi.vid = v->vid;
1280                 br_vlan_get_stats(v, &stats);
1281                 vxi.rx_bytes = stats.rx_bytes;
1282                 vxi.rx_packets = stats.rx_packets;
1283                 vxi.tx_bytes = stats.tx_bytes;
1284                 vxi.tx_packets = stats.tx_packets;
1285
1286                 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1287                         goto nla_put_failure;
1288         }
1289         nla_nest_end(skb, nest);
1290         *prividx = 0;
1291 out:
1292         return 0;
1293
1294 nla_put_failure:
1295         nla_nest_end(skb, nest);
1296         *prividx = vl_idx;
1297
1298         return -EMSGSIZE;
1299 }
1300
1301 static struct rtnl_af_ops br_af_ops __read_mostly = {
1302         .family                 = AF_BRIDGE,
1303         .get_link_af_size       = br_get_link_af_size_filtered,
1304 };
1305
1306 struct rtnl_link_ops br_link_ops __read_mostly = {
1307         .kind                   = "bridge",
1308         .priv_size              = sizeof(struct net_bridge),
1309         .setup                  = br_dev_setup,
1310         .maxtype                = IFLA_BR_MAX,
1311         .policy                 = br_policy,
1312         .validate               = br_validate,
1313         .newlink                = br_dev_newlink,
1314         .changelink             = br_changelink,
1315         .dellink                = br_dev_delete,
1316         .get_size               = br_get_size,
1317         .fill_info              = br_fill_info,
1318         .fill_linkxstats        = br_fill_linkxstats,
1319         .get_linkxstats_size    = br_get_linkxstats_size,
1320
1321         .slave_maxtype          = IFLA_BRPORT_MAX,
1322         .slave_policy           = br_port_policy,
1323         .slave_changelink       = br_port_slave_changelink,
1324         .get_slave_size         = br_port_get_slave_size,
1325         .fill_slave_info        = br_port_fill_slave_info,
1326 };
1327
1328 int __init br_netlink_init(void)
1329 {
1330         int err;
1331
1332         br_mdb_init();
1333         rtnl_af_register(&br_af_ops);
1334
1335         err = rtnl_link_register(&br_link_ops);
1336         if (err)
1337                 goto out_af;
1338
1339         return 0;
1340
1341 out_af:
1342         rtnl_af_unregister(&br_af_ops);
1343         br_mdb_uninit();
1344         return err;
1345 }
1346
1347 void br_netlink_fini(void)
1348 {
1349         br_mdb_uninit();
1350         rtnl_af_unregister(&br_af_ops);
1351         rtnl_link_unregister(&br_link_ops);
1352 }