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 #include "br_private_tunnel.h"
  24
  25 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  26                                 u32 filter_mask)
  27 {
  28         struct net_bridge_vlan *v;
  29         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
  30         u16 flags, pvid;
  31         int num_vlans = 0;
  32
  33         if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
  34                 return 0;
  35
  36         pvid = br_get_pvid(vg);
  37         /* Count number of vlan infos */
  38         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
  39                 flags = 0;
  40                 /* only a context, bridge vlan not activated */
  41                 if (!br_vlan_should_use(v))
  42                         continue;
  43                 if (v->vid == pvid)
  44                         flags |= BRIDGE_VLAN_INFO_PVID;
  45
  46                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
  47                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
  48
  49                 if (vid_range_start == 0) {
  50                         goto initvars;
  51                 } else if ((v->vid - vid_range_end) == 1 &&
  52                         flags == vid_range_flags) {
  53                         vid_range_end = v->vid;
  54                         continue;
  55                 } else {
  56                         if ((vid_range_end - vid_range_start) > 0)
  57                                 num_vlans += 2;
  58                         else
  59                                 num_vlans += 1;
  60                 }
  61 initvars:
  62                 vid_range_start = v->vid;
  63                 vid_range_end = v->vid;
  64                 vid_range_flags = flags;
  65         }
  66
  67         if (vid_range_start != 0) {
  68                 if ((vid_range_end - vid_range_start) > 0)
  69                         num_vlans += 2;
  70                 else
  71                         num_vlans += 1;
  72         }
  73
  74         return num_vlans;
  75 }
  76
  77 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  78                                  u32 filter_mask)
  79 {
  80         int num_vlans;
  81
  82         if (!vg)
  83                 return 0;
  84
  85         if (filter_mask & RTEXT_FILTER_BRVLAN)
  86                 return vg->num_vlans;
  87
  88         rcu_read_lock();
  89         num_vlans = __get_num_vlan_infos(vg, filter_mask);
  90         rcu_read_unlock();
  91
  92         return num_vlans;
  93 }
  94
  95 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
  96                                            u32 filter_mask)
  97 {
  98         struct net_bridge_vlan_group *vg = NULL;
  99         struct net_bridge_port *p = NULL;
 100         struct net_bridge *br;
 101         int num_vlan_infos;
 102         size_t vinfo_sz = 0;
 103
 104         rcu_read_lock();
 105         if (br_port_exists(dev)) {
 106                 p = br_port_get_rcu(dev);
 107                 vg = nbp_vlan_group_rcu(p);
 108         } else if (dev->priv_flags & IFF_EBRIDGE) {
 109                 br = netdev_priv(dev);
 110                 vg = br_vlan_group_rcu(br);
 111         }
 112         num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
 113         rcu_read_unlock();
 114
 115         if (p && (p->flags & BR_VLAN_TUNNEL))
 116                 vinfo_sz += br_get_vlan_tunnel_info_size(vg);
 117
 118         /* Each VLAN is returned in bridge_vlan_info along with flags */
 119         vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
 120
 121         return vinfo_sz;
 122 }
 123
 124 static inline size_t br_port_info_size(void)
 125 {
 126         return nla_total_size(1)        /* IFLA_BRPORT_STATE  */
 127                 + nla_total_size(2)     /* IFLA_BRPORT_PRIORITY */
 128                 + nla_total_size(4)     /* IFLA_BRPORT_COST */
 129                 + nla_total_size(1)     /* IFLA_BRPORT_MODE */
 130                 + nla_total_size(1)     /* IFLA_BRPORT_GUARD */
 131                 + nla_total_size(1)     /* IFLA_BRPORT_PROTECT */
 132                 + nla_total_size(1)     /* IFLA_BRPORT_FAST_LEAVE */
 133                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_TO_UCAST */
 134                 + nla_total_size(1)     /* IFLA_BRPORT_LEARNING */
 135                 + nla_total_size(1)     /* IFLA_BRPORT_UNICAST_FLOOD */
 136                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_FLOOD */
 137                 + nla_total_size(1)     /* IFLA_BRPORT_BCAST_FLOOD */
 138                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP */
 139                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP_WIFI */
 140                 + nla_total_size(1)     /* IFLA_BRPORT_VLAN_TUNNEL */
 141                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
 142                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
 143                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_PORT */
 144                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_COST */
 145                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_ID */
 146                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_NO */
 147                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
 148                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_CONFIG_PENDING */
 149                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
 150                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
 151                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
 152 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 153                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MULTICAST_ROUTER */
 154 #endif
 155                 + 0;
 156 }
 157
 158 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
 159 {
 160         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
 161                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
 162                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
 163                 + nla_total_size(4) /* IFLA_MASTER */
 164                 + nla_total_size(4) /* IFLA_MTU */
 165                 + nla_total_size(4) /* IFLA_LINK */
 166                 + nla_total_size(1) /* IFLA_OPERSTATE */
 167                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
 168                 + nla_total_size(br_get_link_af_size_filtered(dev,
 169                                  filter_mask)); /* IFLA_AF_SPEC */
 170 }
 171
 172 static int br_port_fill_attrs(struct sk_buff *skb,
 173                               const struct net_bridge_port *p)
 174 {
 175         u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
 176         u64 timerval;
 177
 178         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
 179             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
 180             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
 181             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
 182             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
 183             nla_put_u8(skb, IFLA_BRPORT_PROTECT,
 184                        !!(p->flags & BR_ROOT_BLOCK)) ||
 185             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
 186                        !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
 187             nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
 188                        !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
 189             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
 190             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
 191                        !!(p->flags & BR_FLOOD)) ||
 192             nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
 193                        !!(p->flags & BR_MCAST_FLOOD)) ||
 194             nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
 195                        !!(p->flags & BR_BCAST_FLOOD)) ||
 196             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
 197             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
 198                        !!(p->flags & BR_PROXYARP_WIFI)) ||
 199             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
 200                     &p->designated_root) ||
 201             nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
 202                     &p->designated_bridge) ||
 203             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
 204             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
 205             nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
 206             nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
 207             nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
 208                        p->topology_change_ack) ||
 209             nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
 210             nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
 211                                                         BR_VLAN_TUNNEL)))
 212                 return -EMSGSIZE;
 213
 214         timerval = br_timer_value(&p->message_age_timer);
 215         if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
 216                               IFLA_BRPORT_PAD))
 217                 return -EMSGSIZE;
 218         timerval = br_timer_value(&p->forward_delay_timer);
 219         if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
 220                               IFLA_BRPORT_PAD))
 221                 return -EMSGSIZE;
 222         timerval = br_timer_value(&p->hold_timer);
 223         if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
 224                               IFLA_BRPORT_PAD))
 225                 return -EMSGSIZE;
 226
 227 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 228         if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
 229                        p->multicast_router))
 230                 return -EMSGSIZE;
 231 #endif
 232
 233         return 0;
 234 }
 235
 236 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
 237                                     u16 vid_end, u16 flags)
 238 {
 239         struct  bridge_vlan_info vinfo;
 240
 241         if ((vid_end - vid_start) > 0) {
 242                 /* add range to skb */
 243                 vinfo.vid = vid_start;
 244                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
 245                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 246                             sizeof(vinfo), &vinfo))
 247                         goto nla_put_failure;
 248
 249                 vinfo.vid = vid_end;
 250                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
 251                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 252                             sizeof(vinfo), &vinfo))
 253                         goto nla_put_failure;
 254         } else {
 255                 vinfo.vid = vid_start;
 256                 vinfo.flags = flags;
 257                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 258                             sizeof(vinfo), &vinfo))
 259                         goto nla_put_failure;
 260         }
 261
 262         return 0;
 263
 264 nla_put_failure:
 265         return -EMSGSIZE;
 266 }
 267
 268 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
 269                                          struct net_bridge_vlan_group *vg)
 270 {
 271         struct net_bridge_vlan *v;
 272         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 273         u16 flags, pvid;
 274         int err = 0;
 275
 276         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
 277          * and mark vlan info with begin and end flags
 278          * if vlaninfo represents a range
 279          */
 280         pvid = br_get_pvid(vg);
 281         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 282                 flags = 0;
 283                 if (!br_vlan_should_use(v))
 284                         continue;
 285                 if (v->vid == pvid)
 286                         flags |= BRIDGE_VLAN_INFO_PVID;
 287
 288                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 289                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 290
 291                 if (vid_range_start == 0) {
 292                         goto initvars;
 293                 } else if ((v->vid - vid_range_end) == 1 &&
 294                         flags == vid_range_flags) {
 295                         vid_range_end = v->vid;
 296                         continue;
 297                 } else {
 298                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 299                                                        vid_range_end,
 300                                                        vid_range_flags);
 301                         if (err)
 302                                 return err;
 303                 }
 304
 305 initvars:
 306                 vid_range_start = v->vid;
 307                 vid_range_end = v->vid;
 308                 vid_range_flags = flags;
 309         }
 310
 311         if (vid_range_start != 0) {
 312                 /* Call it once more to send any left over vlans */
 313                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 314                                                vid_range_end,
 315                                                vid_range_flags);
 316                 if (err)
 317                         return err;
 318         }
 319
 320         return 0;
 321 }
 322
 323 static int br_fill_ifvlaninfo(struct sk_buff *skb,
 324                               struct net_bridge_vlan_group *vg)
 325 {
 326         struct bridge_vlan_info vinfo;
 327         struct net_bridge_vlan *v;
 328         u16 pvid;
 329
 330         pvid = br_get_pvid(vg);
 331         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 332                 if (!br_vlan_should_use(v))
 333                         continue;
 334
 335                 vinfo.vid = v->vid;
 336                 vinfo.flags = 0;
 337                 if (v->vid == pvid)
 338                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
 339
 340                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 341                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 342
 343                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 344                             sizeof(vinfo), &vinfo))
 345                         goto nla_put_failure;
 346         }
 347
 348         return 0;
 349
 350 nla_put_failure:
 351         return -EMSGSIZE;
 352 }
 353
 354 /*
 355  * Create one netlink message for one interface
 356  * Contains port and master info as well as carrier and bridge state.
 357  */
 358 static int br_fill_ifinfo(struct sk_buff *skb,
 359                           struct net_bridge_port *port,
 360                           u32 pid, u32 seq, int event, unsigned int flags,
 361                           u32 filter_mask, const struct net_device *dev)
 362 {
 363         struct net_bridge *br;
 364         struct ifinfomsg *hdr;
 365         struct nlmsghdr *nlh;
 366         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
 367
 368         if (port)
 369                 br = port->br;
 370         else
 371                 br = netdev_priv(dev);
 372
 373         br_debug(br, "br_fill_info event %d port %s master %s\n",
 374                      event, dev->name, br->dev->name);
 375
 376         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
 377         if (nlh == NULL)
 378                 return -EMSGSIZE;
 379
 380         hdr = nlmsg_data(nlh);
 381         hdr->ifi_family = AF_BRIDGE;
 382         hdr->__ifi_pad = 0;
 383         hdr->ifi_type = dev->type;
 384         hdr->ifi_index = dev->ifindex;
 385         hdr->ifi_flags = dev_get_flags(dev);
 386         hdr->ifi_change = 0;
 387
 388         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
 389             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
 390             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
 391             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
 392             (dev->addr_len &&
 393              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
 394             (dev->ifindex != dev_get_iflink(dev) &&
 395              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
 396                 goto nla_put_failure;
 397
 398         if (event == RTM_NEWLINK && port) {
 399                 struct nlattr *nest
 400                         = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
 401
 402                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 403                         goto nla_put_failure;
 404                 nla_nest_end(skb, nest);
 405         }
 406
 407         /* Check if  the VID information is requested */
 408         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
 409             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
 410                 struct net_bridge_vlan_group *vg;
 411                 struct nlattr *af;
 412                 int err;
 413
 414                 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
 415                 rcu_read_lock();
 416                 if (port)
 417                         vg = nbp_vlan_group_rcu(port);
 418                 else
 419                         vg = br_vlan_group_rcu(br);
 420
 421                 if (!vg || !vg->num_vlans) {
 422                         rcu_read_unlock();
 423                         goto done;
 424                 }
 425                 af = nla_nest_start(skb, IFLA_AF_SPEC);
 426                 if (!af) {
 427                         rcu_read_unlock();
 428                         goto nla_put_failure;
 429                 }
 430                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 431                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 432                 else
 433                         err = br_fill_ifvlaninfo(skb, vg);
 434
 435                 if (port && (port->flags & BR_VLAN_TUNNEL))
 436                         err = br_fill_vlan_tunnel_info(skb, vg);
 437                 rcu_read_unlock();
 438                 if (err)
 439                         goto nla_put_failure;
 440                 nla_nest_end(skb, af);
 441         }
 442
 443 done:
 444         nlmsg_end(skb, nlh);
 445         return 0;
 446
 447 nla_put_failure:
 448         nlmsg_cancel(skb, nlh);
 449         return -EMSGSIZE;
 450 }
 451
 452 /*
 453  * Notify listeners of a change in port information
 454  */
 455 void br_ifinfo_notify(int event, struct net_bridge_port *port)
 456 {
 457         struct net *net;
 458         struct sk_buff *skb;
 459         int err = -ENOBUFS;
 460         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 461
 462         if (!port)
 463                 return;
 464
 465         net = dev_net(port->dev);
 466         br_debug(port->br, "port %u(%s) event %d\n",
 467                  (unsigned int)port->port_no, port->dev->name, event);
 468
 469         skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
 470         if (skb == NULL)
 471                 goto errout;
 472
 473         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
 474         if (err < 0) {
 475                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 476                 WARN_ON(err == -EMSGSIZE);
 477                 kfree_skb(skb);
 478                 goto errout;
 479         }
 480         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 481         return;
 482 errout:
 483         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 484 }
 485
 486
 487 /*
 488  * Dump information about all ports, in response to GETLINK
 489  */
 490 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 491                struct net_device *dev, u32 filter_mask, int nlflags)
 492 {
 493         struct net_bridge_port *port = br_port_get_rtnl(dev);
 494
 495         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 496             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
 497                 return 0;
 498
 499         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 500                               filter_mask, dev);
 501 }
 502
 503 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 504                         int cmd, struct bridge_vlan_info *vinfo)
 505 {
 506         int err = 0;
 507
 508         switch (cmd) {
 509         case RTM_SETLINK:
 510                 if (p) {
 511                         /* if the MASTER flag is set this will act on the global
 512                          * per-VLAN entry as well
 513                          */
 514                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
 515                         if (err)
 516                                 break;
 517                 } else {
 518                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 519                         err = br_vlan_add(br, vinfo->vid, vinfo->flags);
 520                 }
 521                 break;
 522
 523         case RTM_DELLINK:
 524                 if (p) {
 525                         nbp_vlan_delete(p, vinfo->vid);
 526                         if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
 527                                 br_vlan_delete(p->br, vinfo->vid);
 528                 } else {
 529                         br_vlan_delete(br, vinfo->vid);
 530                 }
 531                 break;
 532         }
 533
 534         return err;
 535 }
 536
 537 static int br_process_vlan_info(struct net_bridge *br,
 538                                 struct net_bridge_port *p, int cmd,
 539                                 struct bridge_vlan_info *vinfo_curr,
 540                                 struct bridge_vlan_info **vinfo_last)
 541 {
 542         if (!vinfo_curr->vid || vinfo_curr->vid >= VLAN_VID_MASK)
 543                 return -EINVAL;
 544
 545         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 546                 /* check if we are already processing a range */
 547                 if (*vinfo_last)
 548                         return -EINVAL;
 549                 *vinfo_last = vinfo_curr;
 550                 /* don't allow range of pvids */
 551                 if ((*vinfo_last)->flags & BRIDGE_VLAN_INFO_PVID)
 552                         return -EINVAL;
 553                 return 0;
 554         }
 555
 556         if (*vinfo_last) {
 557                 struct bridge_vlan_info tmp_vinfo;
 558                 int v, err;
 559
 560                 if (!(vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END))
 561                         return -EINVAL;
 562
 563                 if (vinfo_curr->vid <= (*vinfo_last)->vid)
 564                         return -EINVAL;
 565
 566                 memcpy(&tmp_vinfo, *vinfo_last,
 567                        sizeof(struct bridge_vlan_info));
 568                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
 569                         tmp_vinfo.vid = v;
 570                         err = br_vlan_info(br, p, cmd, &tmp_vinfo);
 571                         if (err)
 572                                 break;
 573                 }
 574                 *vinfo_last = NULL;
 575
 576                 return 0;
 577         }
 578
 579         return br_vlan_info(br, p, cmd, vinfo_curr);
 580 }
 581
 582 static int br_afspec(struct net_bridge *br,
 583                      struct net_bridge_port *p,
 584                      struct nlattr *af_spec,
 585                      int cmd)
 586 {
 587         struct bridge_vlan_info *vinfo_curr = NULL;
 588         struct bridge_vlan_info *vinfo_last = NULL;
 589         struct nlattr *attr;
 590         struct vtunnel_info tinfo_last = {};
 591         struct vtunnel_info tinfo_curr = {};
 592         int err = 0, rem;
 593
 594         nla_for_each_nested(attr, af_spec, rem) {
 595                 err = 0;
 596                 switch (nla_type(attr)) {
 597                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
 598                         if (!(p->flags & BR_VLAN_TUNNEL))
 599                                 return -EINVAL;
 600                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
 601                         if (err)
 602                                 return err;
 603                         err = br_process_vlan_tunnel_info(br, p, cmd,
 604                                                           &tinfo_curr,
 605                                                           &tinfo_last);
 606                         if (err)
 607                                 return err;
 608                         break;
 609                 case IFLA_BRIDGE_VLAN_INFO:
 610                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 611                                 return -EINVAL;
 612                         vinfo_curr = nla_data(attr);
 613                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
 614                                                    &vinfo_last);
 615                         if (err)
 616                                 return err;
 617                         break;
 618                 }
 619         }
 620
 621         return err;
 622 }
 623
 624 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 625         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 626         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 627         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 628         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 629         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 630         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 631         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 632         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 633         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 634         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 635         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 636         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 637         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
 638         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
 639         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
 640 };
 641
 642 /* Change the state of the port and notify spanning tree */
 643 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 644 {
 645         if (state > BR_STATE_BLOCKING)
 646                 return -EINVAL;
 647
 648         /* if kernel STP is running, don't allow changes */
 649         if (p->br->stp_enabled == BR_KERNEL_STP)
 650                 return -EBUSY;
 651
 652         /* if device is not up, change is not allowed
 653          * if link is not present, only allowable state is disabled
 654          */
 655         if (!netif_running(p->dev) ||
 656             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 657                 return -ENETDOWN;
 658
 659         br_set_state(p, state);
 660         br_port_state_selection(p->br);
 661         return 0;
 662 }
 663
 664 /* Set/clear or port flags based on attribute */
 665 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 666                            int attrtype, unsigned long mask)
 667 {
 668         if (tb[attrtype]) {
 669                 u8 flag = nla_get_u8(tb[attrtype]);
 670                 if (flag)
 671                         p->flags |= mask;
 672                 else
 673                         p->flags &= ~mask;
 674         }
 675 }
 676
 677 /* Process bridge protocol info on port */
 678 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 679 {
 680         unsigned long old_flags = p->flags;
 681         bool br_vlan_tunnel_old = false;
 682         int err;
 683
 684         br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 685         br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 686         br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 687         br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 688         br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 689         br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 690         br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
 691         br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
 692         br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
 693         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 694         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 695
 696         br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
 697         br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
 698         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
 699                 nbp_vlan_tunnel_info_flush(p);
 700
 701         if (tb[IFLA_BRPORT_COST]) {
 702                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 703                 if (err)
 704                         return err;
 705         }
 706
 707         if (tb[IFLA_BRPORT_PRIORITY]) {
 708                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 709                 if (err)
 710                         return err;
 711         }
 712
 713         if (tb[IFLA_BRPORT_STATE]) {
 714                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 715                 if (err)
 716                         return err;
 717         }
 718
 719         if (tb[IFLA_BRPORT_FLUSH])
 720                 br_fdb_delete_by_port(p->br, p, 0, 0);
 721
 722 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 723         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 724                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 725
 726                 err = br_multicast_set_port_router(p, mcast_router);
 727                 if (err)
 728                         return err;
 729         }
 730 #endif
 731         br_port_flags_change(p, old_flags ^ p->flags);
 732         return 0;
 733 }
 734
 735 /* Change state and parameters on port. */
 736 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 737 {
 738         struct nlattr *protinfo;
 739         struct nlattr *afspec;
 740         struct net_bridge_port *p;
 741         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 742         int err = 0;
 743
 744         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 745         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 746         if (!protinfo && !afspec)
 747                 return 0;
 748
 749         p = br_port_get_rtnl(dev);
 750         /* We want to accept dev as bridge itself if the AF_SPEC
 751          * is set to see if someone is setting vlan info on the bridge
 752          */
 753         if (!p && !afspec)
 754                 return -EINVAL;
 755
 756         if (p && protinfo) {
 757                 if (protinfo->nla_type & NLA_F_NESTED) {
 758                         err = nla_parse_nested(tb, IFLA_BRPORT_MAX, protinfo,
 759                                                br_port_policy, NULL);
 760                         if (err)
 761                                 return err;
 762
 763                         spin_lock_bh(&p->br->lock);
 764                         err = br_setport(p, tb);
 765                         spin_unlock_bh(&p->br->lock);
 766                 } else {
 767                         /* Binary compatibility with old RSTP */
 768                         if (nla_len(protinfo) < sizeof(u8))
 769                                 return -EINVAL;
 770
 771                         spin_lock_bh(&p->br->lock);
 772                         err = br_set_port_state(p, nla_get_u8(protinfo));
 773                         spin_unlock_bh(&p->br->lock);
 774                 }
 775                 if (err)
 776                         goto out;
 777         }
 778
 779         if (afspec) {
 780                 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 781                                 afspec, RTM_SETLINK);
 782         }
 783
 784         if (err == 0)
 785                 br_ifinfo_notify(RTM_NEWLINK, p);
 786 out:
 787         return err;
 788 }
 789
 790 /* Delete port information */
 791 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 792 {
 793         struct nlattr *afspec;
 794         struct net_bridge_port *p;
 795         int err = 0;
 796
 797         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 798         if (!afspec)
 799                 return 0;
 800
 801         p = br_port_get_rtnl(dev);
 802         /* We want to accept dev as bridge itself as well */
 803         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
 804                 return -EINVAL;
 805
 806         err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 807                         afspec, RTM_DELLINK);
 808         if (err == 0)
 809                 /* Send RTM_NEWLINK because userspace
 810                  * expects RTM_NEWLINK for vlan dels
 811                  */
 812                 br_ifinfo_notify(RTM_NEWLINK, p);
 813
 814         return err;
 815 }
 816 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
 817 {
 818         if (tb[IFLA_ADDRESS]) {
 819                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 820                         return -EINVAL;
 821                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 822                         return -EADDRNOTAVAIL;
 823         }
 824
 825         if (!data)
 826                 return 0;
 827
 828 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 829         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 830                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
 831                 case htons(ETH_P_8021Q):
 832                 case htons(ETH_P_8021AD):
 833                         break;
 834                 default:
 835                         return -EPROTONOSUPPORT;
 836                 }
 837         }
 838
 839         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 840                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 841
 842                 if (defpvid >= VLAN_VID_MASK)
 843                         return -EINVAL;
 844         }
 845 #endif
 846
 847         return 0;
 848 }
 849
 850 static int br_port_slave_changelink(struct net_device *brdev,
 851                                     struct net_device *dev,
 852                                     struct nlattr *tb[],
 853                                     struct nlattr *data[])
 854 {
 855         struct net_bridge *br = netdev_priv(brdev);
 856         int ret;
 857
 858         if (!data)
 859                 return 0;
 860
 861         spin_lock_bh(&br->lock);
 862         ret = br_setport(br_port_get_rtnl(dev), data);
 863         spin_unlock_bh(&br->lock);
 864
 865         return ret;
 866 }
 867
 868 static int br_port_fill_slave_info(struct sk_buff *skb,
 869                                    const struct net_device *brdev,
 870                                    const struct net_device *dev)
 871 {
 872         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
 873 }
 874
 875 static size_t br_port_get_slave_size(const struct net_device *brdev,
 876                                      const struct net_device *dev)
 877 {
 878         return br_port_info_size();
 879 }
 880
 881 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
 882         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
 883         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
 884         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
 885         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
 886         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
 887         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
 888         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
 889         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
 890         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
 891         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
 892                                  .len  = ETH_ALEN },
 893         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
 894         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
 895         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
 896         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
 897         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
 898         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
 899         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
 900         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
 901         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
 902         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
 903         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
 904         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
 905         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
 906         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
 907         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
 908         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
 909         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
 910         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
 911         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
 912         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
 913         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
 914         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
 915 };
 916
 917 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
 918                          struct nlattr *data[])
 919 {
 920         struct net_bridge *br = netdev_priv(brdev);
 921         int err;
 922
 923         if (!data)
 924                 return 0;
 925
 926         if (data[IFLA_BR_FORWARD_DELAY]) {
 927                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
 928                 if (err)
 929                         return err;
 930         }
 931
 932         if (data[IFLA_BR_HELLO_TIME]) {
 933                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
 934                 if (err)
 935                         return err;
 936         }
 937
 938         if (data[IFLA_BR_MAX_AGE]) {
 939                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
 940                 if (err)
 941                         return err;
 942         }
 943
 944         if (data[IFLA_BR_AGEING_TIME]) {
 945                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
 946                 if (err)
 947                         return err;
 948         }
 949
 950         if (data[IFLA_BR_STP_STATE]) {
 951                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
 952
 953                 br_stp_set_enabled(br, stp_enabled);
 954         }
 955
 956         if (data[IFLA_BR_PRIORITY]) {
 957                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
 958
 959                 br_stp_set_bridge_priority(br, priority);
 960         }
 961
 962         if (data[IFLA_BR_VLAN_FILTERING]) {
 963                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
 964
 965                 err = __br_vlan_filter_toggle(br, vlan_filter);
 966                 if (err)
 967                         return err;
 968         }
 969
 970 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 971         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 972                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
 973
 974                 err = __br_vlan_set_proto(br, vlan_proto);
 975                 if (err)
 976                         return err;
 977         }
 978
 979         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 980                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 981
 982                 err = __br_vlan_set_default_pvid(br, defpvid);
 983                 if (err)
 984                         return err;
 985         }
 986
 987         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
 988                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
 989
 990                 err = br_vlan_set_stats(br, vlan_stats);
 991                 if (err)
 992                         return err;
 993         }
 994 #endif
 995
 996         if (data[IFLA_BR_GROUP_FWD_MASK]) {
 997                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
 998
 999                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1000                         return -EINVAL;
1001                 br->group_fwd_mask = fwd_mask;
1002         }
1003
1004         if (data[IFLA_BR_GROUP_ADDR]) {
1005                 u8 new_addr[ETH_ALEN];
1006
1007                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1008                         return -EINVAL;
1009                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1010                 if (!is_link_local_ether_addr(new_addr))
1011                         return -EINVAL;
1012                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1013                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1014                     new_addr[5] == 3)           /* 802.1X PAE address */
1015                         return -EINVAL;
1016                 spin_lock_bh(&br->lock);
1017                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1018                 spin_unlock_bh(&br->lock);
1019                 br->group_addr_set = true;
1020                 br_recalculate_fwd_mask(br);
1021         }
1022
1023         if (data[IFLA_BR_FDB_FLUSH])
1024                 br_fdb_flush(br);
1025
1026 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1027         if (data[IFLA_BR_MCAST_ROUTER]) {
1028                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1029
1030                 err = br_multicast_set_router(br, multicast_router);
1031                 if (err)
1032                         return err;
1033         }
1034
1035         if (data[IFLA_BR_MCAST_SNOOPING]) {
1036                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1037
1038                 err = br_multicast_toggle(br, mcast_snooping);
1039                 if (err)
1040                         return err;
1041         }
1042
1043         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1044                 u8 val;
1045
1046                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1047                 br->multicast_query_use_ifaddr = !!val;
1048         }
1049
1050         if (data[IFLA_BR_MCAST_QUERIER]) {
1051                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1052
1053                 err = br_multicast_set_querier(br, mcast_querier);
1054                 if (err)
1055                         return err;
1056         }
1057
1058         if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
1059                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
1060
1061                 br->hash_elasticity = val;
1062         }
1063
1064         if (data[IFLA_BR_MCAST_HASH_MAX]) {
1065                 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1066
1067                 err = br_multicast_set_hash_max(br, hash_max);
1068                 if (err)
1069                         return err;
1070         }
1071
1072         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1073                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1074
1075                 br->multicast_last_member_count = val;
1076         }
1077
1078         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1079                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1080
1081                 br->multicast_startup_query_count = val;
1082         }
1083
1084         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1085                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1086
1087                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1088         }
1089
1090         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1091                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1092
1093                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1094         }
1095
1096         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1097                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1098
1099                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1100         }
1101
1102         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1103                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1104
1105                 br->multicast_query_interval = clock_t_to_jiffies(val);
1106         }
1107
1108         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1109                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1110
1111                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1112         }
1113
1114         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1115                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1116
1117                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1118         }
1119
1120         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1121                 __u8 mcast_stats;
1122
1123                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1124                 br->multicast_stats_enabled = !!mcast_stats;
1125         }
1126
1127         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1128                 __u8 igmp_version;
1129
1130                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1131                 err = br_multicast_set_igmp_version(br, igmp_version);
1132                 if (err)
1133                         return err;
1134         }
1135
1136 #if IS_ENABLED(CONFIG_IPV6)
1137         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1138                 __u8 mld_version;
1139
1140                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1141                 err = br_multicast_set_mld_version(br, mld_version);
1142                 if (err)
1143                         return err;
1144         }
1145 #endif
1146 #endif
1147 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1148         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1149                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1150
1151                 br->nf_call_iptables = val ? true : false;
1152         }
1153
1154         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1155                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1156
1157                 br->nf_call_ip6tables = val ? true : false;
1158         }
1159
1160         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1161                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1162
1163                 br->nf_call_arptables = val ? true : false;
1164         }
1165 #endif
1166
1167         return 0;
1168 }
1169
1170 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1171                           struct nlattr *tb[], struct nlattr *data[])
1172 {
1173         struct net_bridge *br = netdev_priv(dev);
1174         int err;
1175
1176         if (tb[IFLA_ADDRESS]) {
1177                 spin_lock_bh(&br->lock);
1178                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1179                 spin_unlock_bh(&br->lock);
1180         }
1181
1182         err = register_netdevice(dev);
1183         if (err)
1184                 return err;
1185
1186         err = br_changelink(dev, tb, data);
1187         if (err)
1188                 unregister_netdevice(dev);
1189         return err;
1190 }
1191
1192 static size_t br_get_size(const struct net_device *brdev)
1193 {
1194         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1195                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1196                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1197                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1198                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1199                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1200                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1201 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1202                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1203                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1204                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1205 #endif
1206                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1207                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1208                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1209                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1210                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1211                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1212                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1213                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1214                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1215                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1216                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1217                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1218 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1219                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1220                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1221                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1222                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1223                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1224                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1225                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1226                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1227                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1228                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1229                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1230                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1231                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1232                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1233                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1234                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1235                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1236 #endif
1237 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1238                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1239                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1240                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1241 #endif
1242                0;
1243 }
1244
1245 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1246 {
1247         struct net_bridge *br = netdev_priv(brdev);
1248         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1249         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1250         u32 age_time = jiffies_to_clock_t(br->max_age);
1251         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1252         u32 stp_enabled = br->stp_enabled;
1253         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1254         u8 vlan_enabled = br_vlan_enabled(br);
1255         u64 clockval;
1256
1257         clockval = br_timer_value(&br->hello_timer);
1258         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1259                 return -EMSGSIZE;
1260         clockval = br_timer_value(&br->tcn_timer);
1261         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1262                 return -EMSGSIZE;
1263         clockval = br_timer_value(&br->topology_change_timer);
1264         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1265                               IFLA_BR_PAD))
1266                 return -EMSGSIZE;
1267         clockval = br_timer_value(&br->gc_work.timer);
1268         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1269                 return -EMSGSIZE;
1270
1271         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1272             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1273             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1274             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1275             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1276             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1277             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1278             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1279             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1280                     &br->bridge_id) ||
1281             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1282                     &br->designated_root) ||
1283             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1284             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1285             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1286             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1287                        br->topology_change_detected) ||
1288             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1289                 return -EMSGSIZE;
1290
1291 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1292         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1293             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1294             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled))
1295                 return -EMSGSIZE;
1296 #endif
1297 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1298         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1299             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1300             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1301                        br->multicast_query_use_ifaddr) ||
1302             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1303             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1304                        br->multicast_stats_enabled) ||
1305             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1306                         br->hash_elasticity) ||
1307             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1308             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1309                         br->multicast_last_member_count) ||
1310             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1311                         br->multicast_startup_query_count) ||
1312             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1313                        br->multicast_igmp_version))
1314                 return -EMSGSIZE;
1315 #if IS_ENABLED(CONFIG_IPV6)
1316         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1317                        br->multicast_mld_version))
1318                 return -EMSGSIZE;
1319 #endif
1320         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1321         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1322                               IFLA_BR_PAD))
1323                 return -EMSGSIZE;
1324         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1325         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1326                               IFLA_BR_PAD))
1327                 return -EMSGSIZE;
1328         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1329         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1330                               IFLA_BR_PAD))
1331                 return -EMSGSIZE;
1332         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1333         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1334                               IFLA_BR_PAD))
1335                 return -EMSGSIZE;
1336         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1337         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1338                               IFLA_BR_PAD))
1339                 return -EMSGSIZE;
1340         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1341         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1342                               IFLA_BR_PAD))
1343                 return -EMSGSIZE;
1344 #endif
1345 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1346         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1347                        br->nf_call_iptables ? 1 : 0) ||
1348             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1349                        br->nf_call_ip6tables ? 1 : 0) ||
1350             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1351                        br->nf_call_arptables ? 1 : 0))
1352                 return -EMSGSIZE;
1353 #endif
1354
1355         return 0;
1356 }
1357
1358 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1359 {
1360         struct net_bridge_port *p = NULL;
1361         struct net_bridge_vlan_group *vg;
1362         struct net_bridge_vlan *v;
1363         struct net_bridge *br;
1364         int numvls = 0;
1365
1366         switch (attr) {
1367         case IFLA_STATS_LINK_XSTATS:
1368                 br = netdev_priv(dev);
1369                 vg = br_vlan_group(br);
1370                 break;
1371         case IFLA_STATS_LINK_XSTATS_SLAVE:
1372                 p = br_port_get_rtnl(dev);
1373                 if (!p)
1374                         return 0;
1375                 br = p->br;
1376                 vg = nbp_vlan_group(p);
1377                 break;
1378         default:
1379                 return 0;
1380         }
1381
1382         if (vg) {
1383                 /* we need to count all, even placeholder entries */
1384                 list_for_each_entry(v, &vg->vlan_list, vlist)
1385                         numvls++;
1386         }
1387
1388         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1389                nla_total_size(sizeof(struct br_mcast_stats)) +
1390                nla_total_size(0);
1391 }
1392
1393 static int br_fill_linkxstats(struct sk_buff *skb,
1394                               const struct net_device *dev,
1395                               int *prividx, int attr)
1396 {
1397         struct nlattr *nla __maybe_unused;
1398         struct net_bridge_port *p = NULL;
1399         struct net_bridge_vlan_group *vg;
1400         struct net_bridge_vlan *v;
1401         struct net_bridge *br;
1402         struct nlattr *nest;
1403         int vl_idx = 0;
1404
1405         switch (attr) {
1406         case IFLA_STATS_LINK_XSTATS:
1407                 br = netdev_priv(dev);
1408                 vg = br_vlan_group(br);
1409                 break;
1410         case IFLA_STATS_LINK_XSTATS_SLAVE:
1411                 p = br_port_get_rtnl(dev);
1412                 if (!p)
1413                         return 0;
1414                 br = p->br;
1415                 vg = nbp_vlan_group(p);
1416                 break;
1417         default:
1418                 return -EINVAL;
1419         }
1420
1421         nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE);
1422         if (!nest)
1423                 return -EMSGSIZE;
1424
1425         if (vg) {
1426                 u16 pvid;
1427
1428                 pvid = br_get_pvid(vg);
1429                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1430                         struct bridge_vlan_xstats vxi;
1431                         struct br_vlan_stats stats;
1432
1433                         if (++vl_idx < *prividx)
1434                                 continue;
1435                         memset(&vxi, 0, sizeof(vxi));
1436                         vxi.vid = v->vid;
1437                         vxi.flags = v->flags;
1438                         if (v->vid == pvid)
1439                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1440                         br_vlan_get_stats(v, &stats);
1441                         vxi.rx_bytes = stats.rx_bytes;
1442                         vxi.rx_packets = stats.rx_packets;
1443                         vxi.tx_bytes = stats.tx_bytes;
1444                         vxi.tx_packets = stats.tx_packets;
1445
1446                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1447                                 goto nla_put_failure;
1448                 }
1449         }
1450
1451 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1452         if (++vl_idx >= *prividx) {
1453                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1454                                         sizeof(struct br_mcast_stats),
1455                                         BRIDGE_XSTATS_PAD);
1456                 if (!nla)
1457                         goto nla_put_failure;
1458                 br_multicast_get_stats(br, p, nla_data(nla));
1459         }
1460 #endif
1461         nla_nest_end(skb, nest);
1462         *prividx = 0;
1463
1464         return 0;
1465
1466 nla_put_failure:
1467         nla_nest_end(skb, nest);
1468         *prividx = vl_idx;
1469
1470         return -EMSGSIZE;
1471 }
1472
1473 static struct rtnl_af_ops br_af_ops __read_mostly = {
1474         .family                 = AF_BRIDGE,
1475         .get_link_af_size       = br_get_link_af_size_filtered,
1476 };
1477
1478 struct rtnl_link_ops br_link_ops __read_mostly = {
1479         .kind                   = "bridge",
1480         .priv_size              = sizeof(struct net_bridge),
1481         .setup                  = br_dev_setup,
1482         .maxtype                = IFLA_BR_MAX,
1483         .policy                 = br_policy,
1484         .validate               = br_validate,
1485         .newlink                = br_dev_newlink,
1486         .changelink             = br_changelink,
1487         .dellink                = br_dev_delete,
1488         .get_size               = br_get_size,
1489         .fill_info              = br_fill_info,
1490         .fill_linkxstats        = br_fill_linkxstats,
1491         .get_linkxstats_size    = br_get_linkxstats_size,
1492
1493         .slave_maxtype          = IFLA_BRPORT_MAX,
1494         .slave_policy           = br_port_policy,
1495         .slave_changelink       = br_port_slave_changelink,
1496         .get_slave_size         = br_port_get_slave_size,
1497         .fill_slave_info        = br_port_fill_slave_info,
1498 };
1499
1500 int __init br_netlink_init(void)
1501 {
1502         int err;
1503
1504         br_mdb_init();
1505         rtnl_af_register(&br_af_ops);
1506
1507         err = rtnl_link_register(&br_link_ops);
1508         if (err)
1509                 goto out_af;
1510
1511         return 0;
1512
1513 out_af:
1514         rtnl_af_unregister(&br_af_ops);
1515         br_mdb_uninit();
1516         return err;
1517 }
1518
1519 void br_netlink_fini(void)
1520 {
1521         br_mdb_uninit();
1522         rtnl_af_unregister(&br_af_ops);
1523         rtnl_link_unregister(&br_link_ops);
1524 }