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