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(1)     /* IFLA_BRPORT_NEIGH_SUPPRESS */
 142                 + nla_total_size(1)     /* IFLA_BRPORT_ISOLATED */
 143                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
 144                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
 145                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_PORT */
 146                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_COST */
 147                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_ID */
 148                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_NO */
 149                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
 150                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_CONFIG_PENDING */
 151                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
 152                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
 153                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
 154 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 155                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MULTICAST_ROUTER */
 156 #endif
 157                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_GROUP_FWD_MASK */
 158                 + 0;
 159 }
 160
 161 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
 162 {
 163         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
 164                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
 165                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
 166                 + nla_total_size(4) /* IFLA_MASTER */
 167                 + nla_total_size(4) /* IFLA_MTU */
 168                 + nla_total_size(4) /* IFLA_LINK */
 169                 + nla_total_size(1) /* IFLA_OPERSTATE */
 170                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
 171                 + nla_total_size(br_get_link_af_size_filtered(dev,
 172                                  filter_mask)) /* IFLA_AF_SPEC */
 173                 + nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */
 174 }
 175
 176 static int br_port_fill_attrs(struct sk_buff *skb,
 177                               const struct net_bridge_port *p)
 178 {
 179         u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
 180         struct net_bridge_port *backup_p;
 181         u64 timerval;
 182
 183         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
 184             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
 185             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
 186             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
 187             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
 188             nla_put_u8(skb, IFLA_BRPORT_PROTECT,
 189                        !!(p->flags & BR_ROOT_BLOCK)) ||
 190             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
 191                        !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
 192             nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
 193                        !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
 194             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
 195             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
 196                        !!(p->flags & BR_FLOOD)) ||
 197             nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
 198                        !!(p->flags & BR_MCAST_FLOOD)) ||
 199             nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
 200                        !!(p->flags & BR_BCAST_FLOOD)) ||
 201             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
 202             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
 203                        !!(p->flags & BR_PROXYARP_WIFI)) ||
 204             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
 205                     &p->designated_root) ||
 206             nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
 207                     &p->designated_bridge) ||
 208             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
 209             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
 210             nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
 211             nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
 212             nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
 213                        p->topology_change_ack) ||
 214             nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
 215             nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
 216                                                         BR_VLAN_TUNNEL)) ||
 217             nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
 218             nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
 219                        !!(p->flags & BR_NEIGH_SUPPRESS)) ||
 220             nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)))
 221                 return -EMSGSIZE;
 222
 223         timerval = br_timer_value(&p->message_age_timer);
 224         if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
 225                               IFLA_BRPORT_PAD))
 226                 return -EMSGSIZE;
 227         timerval = br_timer_value(&p->forward_delay_timer);
 228         if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
 229                               IFLA_BRPORT_PAD))
 230                 return -EMSGSIZE;
 231         timerval = br_timer_value(&p->hold_timer);
 232         if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
 233                               IFLA_BRPORT_PAD))
 234                 return -EMSGSIZE;
 235
 236 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 237         if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
 238                        p->multicast_router))
 239                 return -EMSGSIZE;
 240 #endif
 241
 242         /* we might be called only with br->lock */
 243         rcu_read_lock();
 244         backup_p = rcu_dereference(p->backup_port);
 245         if (backup_p)
 246                 nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT,
 247                             backup_p->dev->ifindex);
 248         rcu_read_unlock();
 249
 250         return 0;
 251 }
 252
 253 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
 254                                     u16 vid_end, u16 flags)
 255 {
 256         struct  bridge_vlan_info vinfo;
 257
 258         if ((vid_end - vid_start) > 0) {
 259                 /* add range to skb */
 260                 vinfo.vid = vid_start;
 261                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
 262                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 263                             sizeof(vinfo), &vinfo))
 264                         goto nla_put_failure;
 265
 266                 vinfo.vid = vid_end;
 267                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
 268                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 269                             sizeof(vinfo), &vinfo))
 270                         goto nla_put_failure;
 271         } else {
 272                 vinfo.vid = vid_start;
 273                 vinfo.flags = flags;
 274                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 275                             sizeof(vinfo), &vinfo))
 276                         goto nla_put_failure;
 277         }
 278
 279         return 0;
 280
 281 nla_put_failure:
 282         return -EMSGSIZE;
 283 }
 284
 285 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
 286                                          struct net_bridge_vlan_group *vg)
 287 {
 288         struct net_bridge_vlan *v;
 289         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 290         u16 flags, pvid;
 291         int err = 0;
 292
 293         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
 294          * and mark vlan info with begin and end flags
 295          * if vlaninfo represents a range
 296          */
 297         pvid = br_get_pvid(vg);
 298         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 299                 flags = 0;
 300                 if (!br_vlan_should_use(v))
 301                         continue;
 302                 if (v->vid == pvid)
 303                         flags |= BRIDGE_VLAN_INFO_PVID;
 304
 305                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 306                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 307
 308                 if (vid_range_start == 0) {
 309                         goto initvars;
 310                 } else if ((v->vid - vid_range_end) == 1 &&
 311                         flags == vid_range_flags) {
 312                         vid_range_end = v->vid;
 313                         continue;
 314                 } else {
 315                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 316                                                        vid_range_end,
 317                                                        vid_range_flags);
 318                         if (err)
 319                                 return err;
 320                 }
 321
 322 initvars:
 323                 vid_range_start = v->vid;
 324                 vid_range_end = v->vid;
 325                 vid_range_flags = flags;
 326         }
 327
 328         if (vid_range_start != 0) {
 329                 /* Call it once more to send any left over vlans */
 330                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 331                                                vid_range_end,
 332                                                vid_range_flags);
 333                 if (err)
 334                         return err;
 335         }
 336
 337         return 0;
 338 }
 339
 340 static int br_fill_ifvlaninfo(struct sk_buff *skb,
 341                               struct net_bridge_vlan_group *vg)
 342 {
 343         struct bridge_vlan_info vinfo;
 344         struct net_bridge_vlan *v;
 345         u16 pvid;
 346
 347         pvid = br_get_pvid(vg);
 348         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 349                 if (!br_vlan_should_use(v))
 350                         continue;
 351
 352                 vinfo.vid = v->vid;
 353                 vinfo.flags = 0;
 354                 if (v->vid == pvid)
 355                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
 356
 357                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 358                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 359
 360                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 361                             sizeof(vinfo), &vinfo))
 362                         goto nla_put_failure;
 363         }
 364
 365         return 0;
 366
 367 nla_put_failure:
 368         return -EMSGSIZE;
 369 }
 370
 371 /*
 372  * Create one netlink message for one interface
 373  * Contains port and master info as well as carrier and bridge state.
 374  */
 375 static int br_fill_ifinfo(struct sk_buff *skb,
 376                           const struct net_bridge_port *port,
 377                           u32 pid, u32 seq, int event, unsigned int flags,
 378                           u32 filter_mask, const struct net_device *dev)
 379 {
 380         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
 381         struct net_bridge *br;
 382         struct ifinfomsg *hdr;
 383         struct nlmsghdr *nlh;
 384
 385         if (port)
 386                 br = port->br;
 387         else
 388                 br = netdev_priv(dev);
 389
 390         br_debug(br, "br_fill_info event %d port %s master %s\n",
 391                      event, dev->name, br->dev->name);
 392
 393         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
 394         if (nlh == NULL)
 395                 return -EMSGSIZE;
 396
 397         hdr = nlmsg_data(nlh);
 398         hdr->ifi_family = AF_BRIDGE;
 399         hdr->__ifi_pad = 0;
 400         hdr->ifi_type = dev->type;
 401         hdr->ifi_index = dev->ifindex;
 402         hdr->ifi_flags = dev_get_flags(dev);
 403         hdr->ifi_change = 0;
 404
 405         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
 406             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
 407             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
 408             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
 409             (dev->addr_len &&
 410              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
 411             (dev->ifindex != dev_get_iflink(dev) &&
 412              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
 413                 goto nla_put_failure;
 414
 415         if (event == RTM_NEWLINK && port) {
 416                 struct nlattr *nest
 417                         = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
 418
 419                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 420                         goto nla_put_failure;
 421                 nla_nest_end(skb, nest);
 422         }
 423
 424         /* Check if  the VID information is requested */
 425         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
 426             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
 427                 struct net_bridge_vlan_group *vg;
 428                 struct nlattr *af;
 429                 int err;
 430
 431                 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
 432                 rcu_read_lock();
 433                 if (port)
 434                         vg = nbp_vlan_group_rcu(port);
 435                 else
 436                         vg = br_vlan_group_rcu(br);
 437
 438                 if (!vg || !vg->num_vlans) {
 439                         rcu_read_unlock();
 440                         goto done;
 441                 }
 442                 af = nla_nest_start(skb, IFLA_AF_SPEC);
 443                 if (!af) {
 444                         rcu_read_unlock();
 445                         goto nla_put_failure;
 446                 }
 447                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 448                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 449                 else
 450                         err = br_fill_ifvlaninfo(skb, vg);
 451
 452                 if (port && (port->flags & BR_VLAN_TUNNEL))
 453                         err = br_fill_vlan_tunnel_info(skb, vg);
 454                 rcu_read_unlock();
 455                 if (err)
 456                         goto nla_put_failure;
 457                 nla_nest_end(skb, af);
 458         }
 459
 460 done:
 461         nlmsg_end(skb, nlh);
 462         return 0;
 463
 464 nla_put_failure:
 465         nlmsg_cancel(skb, nlh);
 466         return -EMSGSIZE;
 467 }
 468
 469 /* Notify listeners of a change in bridge or port information */
 470 void br_ifinfo_notify(int event, const struct net_bridge *br,
 471                       const struct net_bridge_port *port)
 472 {
 473         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 474         struct net_device *dev;
 475         struct sk_buff *skb;
 476         int err = -ENOBUFS;
 477         struct net *net;
 478         u16 port_no = 0;
 479
 480         if (WARN_ON(!port && !br))
 481                 return;
 482
 483         if (port) {
 484                 dev = port->dev;
 485                 br = port->br;
 486                 port_no = port->port_no;
 487         } else {
 488                 dev = br->dev;
 489         }
 490
 491         net = dev_net(dev);
 492         br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
 493
 494         skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
 495         if (skb == NULL)
 496                 goto errout;
 497
 498         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev);
 499         if (err < 0) {
 500                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 501                 WARN_ON(err == -EMSGSIZE);
 502                 kfree_skb(skb);
 503                 goto errout;
 504         }
 505         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 506         return;
 507 errout:
 508         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 509 }
 510
 511 /*
 512  * Dump information about all ports, in response to GETLINK
 513  */
 514 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 515                struct net_device *dev, u32 filter_mask, int nlflags)
 516 {
 517         struct net_bridge_port *port = br_port_get_rtnl(dev);
 518
 519         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 520             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
 521                 return 0;
 522
 523         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 524                               filter_mask, dev);
 525 }
 526
 527 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 528                         int cmd, struct bridge_vlan_info *vinfo, bool *changed)
 529 {
 530         bool curr_change;
 531         int err = 0;
 532
 533         switch (cmd) {
 534         case RTM_SETLINK:
 535                 if (p) {
 536                         /* if the MASTER flag is set this will act on the global
 537                          * per-VLAN entry as well
 538                          */
 539                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
 540                                            &curr_change);
 541                 } else {
 542                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 543                         err = br_vlan_add(br, vinfo->vid, vinfo->flags,
 544                                           &curr_change);
 545                 }
 546                 if (curr_change)
 547                         *changed = true;
 548                 break;
 549
 550         case RTM_DELLINK:
 551                 if (p) {
 552                         if (!nbp_vlan_delete(p, vinfo->vid))
 553                                 *changed = true;
 554
 555                         if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
 556                             !br_vlan_delete(p->br, vinfo->vid))
 557                                 *changed = true;
 558                 } else if (!br_vlan_delete(br, vinfo->vid)) {
 559                         *changed = true;
 560                 }
 561                 break;
 562         }
 563
 564         return err;
 565 }
 566
 567 static int br_process_vlan_info(struct net_bridge *br,
 568                                 struct net_bridge_port *p, int cmd,
 569                                 struct bridge_vlan_info *vinfo_curr,
 570                                 struct bridge_vlan_info **vinfo_last,
 571                                 bool *changed)
 572 {
 573         if (!vinfo_curr->vid || vinfo_curr->vid >= VLAN_VID_MASK)
 574                 return -EINVAL;
 575
 576         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 577                 /* check if we are already processing a range */
 578                 if (*vinfo_last)
 579                         return -EINVAL;
 580                 *vinfo_last = vinfo_curr;
 581                 /* don't allow range of pvids */
 582                 if ((*vinfo_last)->flags & BRIDGE_VLAN_INFO_PVID)
 583                         return -EINVAL;
 584                 return 0;
 585         }
 586
 587         if (*vinfo_last) {
 588                 struct bridge_vlan_info tmp_vinfo;
 589                 int v, err;
 590
 591                 if (!(vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END))
 592                         return -EINVAL;
 593
 594                 if (vinfo_curr->vid <= (*vinfo_last)->vid)
 595                         return -EINVAL;
 596
 597                 memcpy(&tmp_vinfo, *vinfo_last,
 598                        sizeof(struct bridge_vlan_info));
 599                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
 600                         tmp_vinfo.vid = v;
 601                         err = br_vlan_info(br, p, cmd, &tmp_vinfo, changed);
 602                         if (err)
 603                                 break;
 604                 }
 605                 *vinfo_last = NULL;
 606
 607                 return err;
 608         }
 609
 610         return br_vlan_info(br, p, cmd, vinfo_curr, changed);
 611 }
 612
 613 static int br_afspec(struct net_bridge *br,
 614                      struct net_bridge_port *p,
 615                      struct nlattr *af_spec,
 616                      int cmd, bool *changed)
 617 {
 618         struct bridge_vlan_info *vinfo_curr = NULL;
 619         struct bridge_vlan_info *vinfo_last = NULL;
 620         struct nlattr *attr;
 621         struct vtunnel_info tinfo_last = {};
 622         struct vtunnel_info tinfo_curr = {};
 623         int err = 0, rem;
 624
 625         nla_for_each_nested(attr, af_spec, rem) {
 626                 err = 0;
 627                 switch (nla_type(attr)) {
 628                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
 629                         if (!p || !(p->flags & BR_VLAN_TUNNEL))
 630                                 return -EINVAL;
 631                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
 632                         if (err)
 633                                 return err;
 634                         err = br_process_vlan_tunnel_info(br, p, cmd,
 635                                                           &tinfo_curr,
 636                                                           &tinfo_last,
 637                                                           changed);
 638                         if (err)
 639                                 return err;
 640                         break;
 641                 case IFLA_BRIDGE_VLAN_INFO:
 642                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 643                                 return -EINVAL;
 644                         vinfo_curr = nla_data(attr);
 645                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
 646                                                    &vinfo_last, changed);
 647                         if (err)
 648                                 return err;
 649                         break;
 650                 }
 651         }
 652
 653         return err;
 654 }
 655
 656 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 657         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 658         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 659         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 660         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 661         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 662         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 663         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 664         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 665         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 666         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 667         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 668         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 669         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
 670         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
 671         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
 672         [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
 673         [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
 674         [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
 675         [IFLA_BRPORT_ISOLATED]  = { .type = NLA_U8 },
 676         [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
 677 };
 678
 679 /* Change the state of the port and notify spanning tree */
 680 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 681 {
 682         if (state > BR_STATE_BLOCKING)
 683                 return -EINVAL;
 684
 685         /* if kernel STP is running, don't allow changes */
 686         if (p->br->stp_enabled == BR_KERNEL_STP)
 687                 return -EBUSY;
 688
 689         /* if device is not up, change is not allowed
 690          * if link is not present, only allowable state is disabled
 691          */
 692         if (!netif_running(p->dev) ||
 693             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 694                 return -ENETDOWN;
 695
 696         br_set_state(p, state);
 697         br_port_state_selection(p->br);
 698         return 0;
 699 }
 700
 701 /* Set/clear or port flags based on attribute */
 702 static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 703                             int attrtype, unsigned long mask)
 704 {
 705         unsigned long flags;
 706         int err;
 707
 708         if (!tb[attrtype])
 709                 return 0;
 710
 711         if (nla_get_u8(tb[attrtype]))
 712                 flags = p->flags | mask;
 713         else
 714                 flags = p->flags & ~mask;
 715
 716         err = br_switchdev_set_port_flag(p, flags, mask);
 717         if (err)
 718                 return err;
 719
 720         p->flags = flags;
 721         return 0;
 722 }
 723
 724 /* Process bridge protocol info on port */
 725 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 726 {
 727         unsigned long old_flags = p->flags;
 728         bool br_vlan_tunnel_old = false;
 729         int err;
 730
 731         err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 732         if (err)
 733                 return err;
 734
 735         err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 736         if (err)
 737                 return err;
 738
 739         err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 740         if (err)
 741                 return err;
 742
 743         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 744         if (err)
 745                 return err;
 746
 747         err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 748         if (err)
 749                 return err;
 750
 751         err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 752         if (err)
 753                 return err;
 754
 755         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
 756         if (err)
 757                 return err;
 758
 759         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
 760         if (err)
 761                 return err;
 762
 763         err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
 764         if (err)
 765                 return err;
 766
 767         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 768         if (err)
 769                 return err;
 770
 771         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 772         if (err)
 773                 return err;
 774
 775         br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
 776         err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
 777         if (err)
 778                 return err;
 779
 780         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
 781                 nbp_vlan_tunnel_info_flush(p);
 782
 783         if (tb[IFLA_BRPORT_COST]) {
 784                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 785                 if (err)
 786                         return err;
 787         }
 788
 789         if (tb[IFLA_BRPORT_PRIORITY]) {
 790                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 791                 if (err)
 792                         return err;
 793         }
 794
 795         if (tb[IFLA_BRPORT_STATE]) {
 796                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 797                 if (err)
 798                         return err;
 799         }
 800
 801         if (tb[IFLA_BRPORT_FLUSH])
 802                 br_fdb_delete_by_port(p->br, p, 0, 0);
 803
 804 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 805         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 806                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 807
 808                 err = br_multicast_set_port_router(p, mcast_router);
 809                 if (err)
 810                         return err;
 811         }
 812 #endif
 813
 814         if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
 815                 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
 816
 817                 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
 818                         return -EINVAL;
 819                 p->group_fwd_mask = fwd_mask;
 820         }
 821
 822         err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
 823                                BR_NEIGH_SUPPRESS);
 824         if (err)
 825                 return err;
 826
 827         err = br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
 828         if (err)
 829                 return err;
 830
 831         if (tb[IFLA_BRPORT_BACKUP_PORT]) {
 832                 struct net_device *backup_dev = NULL;
 833                 u32 backup_ifindex;
 834
 835                 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
 836                 if (backup_ifindex) {
 837                         backup_dev = __dev_get_by_index(dev_net(p->dev),
 838                                                         backup_ifindex);
 839                         if (!backup_dev)
 840                                 return -ENOENT;
 841                 }
 842
 843                 err = nbp_backup_change(p, backup_dev);
 844                 if (err)
 845                         return err;
 846         }
 847
 848         br_port_flags_change(p, old_flags ^ p->flags);
 849         return 0;
 850 }
 851
 852 /* Change state and parameters on port. */
 853 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 854 {
 855         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
 856         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 857         struct net_bridge_port *p;
 858         struct nlattr *protinfo;
 859         struct nlattr *afspec;
 860         bool changed = false;
 861         int err = 0;
 862
 863         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 864         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 865         if (!protinfo && !afspec)
 866                 return 0;
 867
 868         p = br_port_get_rtnl(dev);
 869         /* We want to accept dev as bridge itself if the AF_SPEC
 870          * is set to see if someone is setting vlan info on the bridge
 871          */
 872         if (!p && !afspec)
 873                 return -EINVAL;
 874
 875         if (p && protinfo) {
 876                 if (protinfo->nla_type & NLA_F_NESTED) {
 877                         err = nla_parse_nested(tb, IFLA_BRPORT_MAX, protinfo,
 878                                                br_port_policy, NULL);
 879                         if (err)
 880                                 return err;
 881
 882                         spin_lock_bh(&p->br->lock);
 883                         err = br_setport(p, tb);
 884                         spin_unlock_bh(&p->br->lock);
 885                 } else {
 886                         /* Binary compatibility with old RSTP */
 887                         if (nla_len(protinfo) < sizeof(u8))
 888                                 return -EINVAL;
 889
 890                         spin_lock_bh(&p->br->lock);
 891                         err = br_set_port_state(p, nla_get_u8(protinfo));
 892                         spin_unlock_bh(&p->br->lock);
 893                 }
 894                 if (err)
 895                         goto out;
 896                 changed = true;
 897         }
 898
 899         if (afspec)
 900                 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed);
 901
 902         if (changed)
 903                 br_ifinfo_notify(RTM_NEWLINK, br, p);
 904 out:
 905         return err;
 906 }
 907
 908 /* Delete port information */
 909 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 910 {
 911         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
 912         struct net_bridge_port *p;
 913         struct nlattr *afspec;
 914         bool changed = false;
 915         int err = 0;
 916
 917         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 918         if (!afspec)
 919                 return 0;
 920
 921         p = br_port_get_rtnl(dev);
 922         /* We want to accept dev as bridge itself as well */
 923         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
 924                 return -EINVAL;
 925
 926         err = br_afspec(br, p, afspec, RTM_DELLINK, &changed);
 927         if (changed)
 928                 /* Send RTM_NEWLINK because userspace
 929                  * expects RTM_NEWLINK for vlan dels
 930                  */
 931                 br_ifinfo_notify(RTM_NEWLINK, br, p);
 932
 933         return err;
 934 }
 935
 936 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
 937                        struct netlink_ext_ack *extack)
 938 {
 939         if (tb[IFLA_ADDRESS]) {
 940                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 941                         return -EINVAL;
 942                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 943                         return -EADDRNOTAVAIL;
 944         }
 945
 946         if (!data)
 947                 return 0;
 948
 949 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 950         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 951                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
 952                 case htons(ETH_P_8021Q):
 953                 case htons(ETH_P_8021AD):
 954                         break;
 955                 default:
 956                         return -EPROTONOSUPPORT;
 957                 }
 958         }
 959
 960         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 961                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 962
 963                 if (defpvid >= VLAN_VID_MASK)
 964                         return -EINVAL;
 965         }
 966 #endif
 967
 968         return 0;
 969 }
 970
 971 static int br_port_slave_changelink(struct net_device *brdev,
 972                                     struct net_device *dev,
 973                                     struct nlattr *tb[],
 974                                     struct nlattr *data[],
 975                                     struct netlink_ext_ack *extack)
 976 {
 977         struct net_bridge *br = netdev_priv(brdev);
 978         int ret;
 979
 980         if (!data)
 981                 return 0;
 982
 983         spin_lock_bh(&br->lock);
 984         ret = br_setport(br_port_get_rtnl(dev), data);
 985         spin_unlock_bh(&br->lock);
 986
 987         return ret;
 988 }
 989
 990 static int br_port_fill_slave_info(struct sk_buff *skb,
 991                                    const struct net_device *brdev,
 992                                    const struct net_device *dev)
 993 {
 994         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
 995 }
 996
 997 static size_t br_port_get_slave_size(const struct net_device *brdev,
 998                                      const struct net_device *dev)
 999 {
1000         return br_port_info_size();
1001 }
1002
1003 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1004         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1005         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
1006         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
1007         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1008         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1009         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1010         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1011         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1012         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1013         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1014                                  .len  = ETH_ALEN },
1015         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1016         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1017         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1018         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1019         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1020         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1021         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1022         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1023         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1024         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1025         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1026         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1027         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1028         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1029         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1030         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1031         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1032         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1033         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1034         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1035         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1036         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1037         [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1038 };
1039
1040 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1041                          struct nlattr *data[],
1042                          struct netlink_ext_ack *extack)
1043 {
1044         struct net_bridge *br = netdev_priv(brdev);
1045         int err;
1046
1047         if (!data)
1048                 return 0;
1049
1050         if (data[IFLA_BR_FORWARD_DELAY]) {
1051                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1052                 if (err)
1053                         return err;
1054         }
1055
1056         if (data[IFLA_BR_HELLO_TIME]) {
1057                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1058                 if (err)
1059                         return err;
1060         }
1061
1062         if (data[IFLA_BR_MAX_AGE]) {
1063                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1064                 if (err)
1065                         return err;
1066         }
1067
1068         if (data[IFLA_BR_AGEING_TIME]) {
1069                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1070                 if (err)
1071                         return err;
1072         }
1073
1074         if (data[IFLA_BR_STP_STATE]) {
1075                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1076
1077                 br_stp_set_enabled(br, stp_enabled);
1078         }
1079
1080         if (data[IFLA_BR_PRIORITY]) {
1081                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1082
1083                 br_stp_set_bridge_priority(br, priority);
1084         }
1085
1086         if (data[IFLA_BR_VLAN_FILTERING]) {
1087                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1088
1089                 err = __br_vlan_filter_toggle(br, vlan_filter);
1090                 if (err)
1091                         return err;
1092         }
1093
1094 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1095         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1096                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1097
1098                 err = __br_vlan_set_proto(br, vlan_proto);
1099                 if (err)
1100                         return err;
1101         }
1102
1103         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1104                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1105
1106                 err = __br_vlan_set_default_pvid(br, defpvid);
1107                 if (err)
1108                         return err;
1109         }
1110
1111         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1112                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1113
1114                 err = br_vlan_set_stats(br, vlan_stats);
1115                 if (err)
1116                         return err;
1117         }
1118
1119         if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1120                 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1121
1122                 err = br_vlan_set_stats_per_port(br, per_port);
1123                 if (err)
1124                         return err;
1125         }
1126 #endif
1127
1128         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1129                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1130
1131                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1132                         return -EINVAL;
1133                 br->group_fwd_mask = fwd_mask;
1134         }
1135
1136         if (data[IFLA_BR_GROUP_ADDR]) {
1137                 u8 new_addr[ETH_ALEN];
1138
1139                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1140                         return -EINVAL;
1141                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1142                 if (!is_link_local_ether_addr(new_addr))
1143                         return -EINVAL;
1144                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1145                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1146                     new_addr[5] == 3)           /* 802.1X PAE address */
1147                         return -EINVAL;
1148                 spin_lock_bh(&br->lock);
1149                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1150                 spin_unlock_bh(&br->lock);
1151                 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1152                 br_recalculate_fwd_mask(br);
1153         }
1154
1155         if (data[IFLA_BR_FDB_FLUSH])
1156                 br_fdb_flush(br);
1157
1158 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1159         if (data[IFLA_BR_MCAST_ROUTER]) {
1160                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1161
1162                 err = br_multicast_set_router(br, multicast_router);
1163                 if (err)
1164                         return err;
1165         }
1166
1167         if (data[IFLA_BR_MCAST_SNOOPING]) {
1168                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1169
1170                 err = br_multicast_toggle(br, mcast_snooping);
1171                 if (err)
1172                         return err;
1173         }
1174
1175         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1176                 u8 val;
1177
1178                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1179                 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1180         }
1181
1182         if (data[IFLA_BR_MCAST_QUERIER]) {
1183                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1184
1185                 err = br_multicast_set_querier(br, mcast_querier);
1186                 if (err)
1187                         return err;
1188         }
1189
1190         if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
1191                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
1192
1193                 br->hash_elasticity = val;
1194         }
1195
1196         if (data[IFLA_BR_MCAST_HASH_MAX]) {
1197                 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1198
1199                 err = br_multicast_set_hash_max(br, hash_max);
1200                 if (err)
1201                         return err;
1202         }
1203
1204         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1205                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1206
1207                 br->multicast_last_member_count = val;
1208         }
1209
1210         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1211                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1212
1213                 br->multicast_startup_query_count = val;
1214         }
1215
1216         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1217                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1218
1219                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1220         }
1221
1222         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1223                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1224
1225                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1226         }
1227
1228         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1229                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1230
1231                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1232         }
1233
1234         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1235                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1236
1237                 br->multicast_query_interval = clock_t_to_jiffies(val);
1238         }
1239
1240         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1241                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1242
1243                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1244         }
1245
1246         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1247                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1248
1249                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1250         }
1251
1252         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1253                 __u8 mcast_stats;
1254
1255                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1256                 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1257         }
1258
1259         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1260                 __u8 igmp_version;
1261
1262                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1263                 err = br_multicast_set_igmp_version(br, igmp_version);
1264                 if (err)
1265                         return err;
1266         }
1267
1268 #if IS_ENABLED(CONFIG_IPV6)
1269         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1270                 __u8 mld_version;
1271
1272                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1273                 err = br_multicast_set_mld_version(br, mld_version);
1274                 if (err)
1275                         return err;
1276         }
1277 #endif
1278 #endif
1279 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1280         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1281                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1282
1283                 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1284         }
1285
1286         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1287                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1288
1289                 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1290         }
1291
1292         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1293                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1294
1295                 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1296         }
1297 #endif
1298
1299         return 0;
1300 }
1301
1302 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1303                           struct nlattr *tb[], struct nlattr *data[],
1304                           struct netlink_ext_ack *extack)
1305 {
1306         struct net_bridge *br = netdev_priv(dev);
1307         int err;
1308
1309         err = register_netdevice(dev);
1310         if (err)
1311                 return err;
1312
1313         if (tb[IFLA_ADDRESS]) {
1314                 spin_lock_bh(&br->lock);
1315                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1316                 spin_unlock_bh(&br->lock);
1317         }
1318
1319         err = br_changelink(dev, tb, data, extack);
1320         if (err)
1321                 br_dev_delete(dev, NULL);
1322
1323         return err;
1324 }
1325
1326 static size_t br_get_size(const struct net_device *brdev)
1327 {
1328         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1329                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1330                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1331                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1332                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1333                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1334                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1335 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1336                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1337                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1338                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1339                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_PER_PORT */
1340 #endif
1341                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1342                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1343                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1344                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1345                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1346                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1347                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1348                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1349                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1350                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1351                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1352                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1353 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1354                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1355                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1356                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1357                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1358                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1359                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1360                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1361                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1362                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1363                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1364                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1365                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1366                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1367                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1368                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1369                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1370                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1371 #endif
1372 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1373                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1374                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1375                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1376 #endif
1377                0;
1378 }
1379
1380 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1381 {
1382         struct net_bridge *br = netdev_priv(brdev);
1383         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1384         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1385         u32 age_time = jiffies_to_clock_t(br->max_age);
1386         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1387         u32 stp_enabled = br->stp_enabled;
1388         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1389         u8 vlan_enabled = br_vlan_enabled(br->dev);
1390         u64 clockval;
1391
1392         clockval = br_timer_value(&br->hello_timer);
1393         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1394                 return -EMSGSIZE;
1395         clockval = br_timer_value(&br->tcn_timer);
1396         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1397                 return -EMSGSIZE;
1398         clockval = br_timer_value(&br->topology_change_timer);
1399         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1400                               IFLA_BR_PAD))
1401                 return -EMSGSIZE;
1402         clockval = br_timer_value(&br->gc_work.timer);
1403         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1404                 return -EMSGSIZE;
1405
1406         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1407             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1408             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1409             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1410             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1411             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1412             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1413             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1414             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1415                     &br->bridge_id) ||
1416             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1417                     &br->designated_root) ||
1418             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1419             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1420             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1421             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1422                        br->topology_change_detected) ||
1423             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1424                 return -EMSGSIZE;
1425
1426 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1427         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1428             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1429             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1430                        br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1431             nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1432                        br_opt_get(br, IFLA_BR_VLAN_STATS_PER_PORT)))
1433                 return -EMSGSIZE;
1434 #endif
1435 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1436         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1437             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1438                        br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1439             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1440                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1441             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1442                        br_opt_get(br, BROPT_MULTICAST_QUERIER)) ||
1443             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1444                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1445             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1446                         br->hash_elasticity) ||
1447             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1448             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1449                         br->multicast_last_member_count) ||
1450             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1451                         br->multicast_startup_query_count) ||
1452             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1453                        br->multicast_igmp_version))
1454                 return -EMSGSIZE;
1455 #if IS_ENABLED(CONFIG_IPV6)
1456         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1457                        br->multicast_mld_version))
1458                 return -EMSGSIZE;
1459 #endif
1460         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1461         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1462                               IFLA_BR_PAD))
1463                 return -EMSGSIZE;
1464         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1465         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1466                               IFLA_BR_PAD))
1467                 return -EMSGSIZE;
1468         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1469         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1470                               IFLA_BR_PAD))
1471                 return -EMSGSIZE;
1472         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1473         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1474                               IFLA_BR_PAD))
1475                 return -EMSGSIZE;
1476         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1477         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1478                               IFLA_BR_PAD))
1479                 return -EMSGSIZE;
1480         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1481         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1482                               IFLA_BR_PAD))
1483                 return -EMSGSIZE;
1484 #endif
1485 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1486         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1487                        br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1488             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1489                        br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1490             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1491                        br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1492                 return -EMSGSIZE;
1493 #endif
1494
1495         return 0;
1496 }
1497
1498 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1499 {
1500         struct net_bridge_port *p = NULL;
1501         struct net_bridge_vlan_group *vg;
1502         struct net_bridge_vlan *v;
1503         struct net_bridge *br;
1504         int numvls = 0;
1505
1506         switch (attr) {
1507         case IFLA_STATS_LINK_XSTATS:
1508                 br = netdev_priv(dev);
1509                 vg = br_vlan_group(br);
1510                 break;
1511         case IFLA_STATS_LINK_XSTATS_SLAVE:
1512                 p = br_port_get_rtnl(dev);
1513                 if (!p)
1514                         return 0;
1515                 br = p->br;
1516                 vg = nbp_vlan_group(p);
1517                 break;
1518         default:
1519                 return 0;
1520         }
1521
1522         if (vg) {
1523                 /* we need to count all, even placeholder entries */
1524                 list_for_each_entry(v, &vg->vlan_list, vlist)
1525                         numvls++;
1526         }
1527
1528         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1529                nla_total_size(sizeof(struct br_mcast_stats)) +
1530                nla_total_size(0);
1531 }
1532
1533 static int br_fill_linkxstats(struct sk_buff *skb,
1534                               const struct net_device *dev,
1535                               int *prividx, int attr)
1536 {
1537         struct nlattr *nla __maybe_unused;
1538         struct net_bridge_port *p = NULL;
1539         struct net_bridge_vlan_group *vg;
1540         struct net_bridge_vlan *v;
1541         struct net_bridge *br;
1542         struct nlattr *nest;
1543         int vl_idx = 0;
1544
1545         switch (attr) {
1546         case IFLA_STATS_LINK_XSTATS:
1547                 br = netdev_priv(dev);
1548                 vg = br_vlan_group(br);
1549                 break;
1550         case IFLA_STATS_LINK_XSTATS_SLAVE:
1551                 p = br_port_get_rtnl(dev);
1552                 if (!p)
1553                         return 0;
1554                 br = p->br;
1555                 vg = nbp_vlan_group(p);
1556                 break;
1557         default:
1558                 return -EINVAL;
1559         }
1560
1561         nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE);
1562         if (!nest)
1563                 return -EMSGSIZE;
1564
1565         if (vg) {
1566                 u16 pvid;
1567
1568                 pvid = br_get_pvid(vg);
1569                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1570                         struct bridge_vlan_xstats vxi;
1571                         struct br_vlan_stats stats;
1572
1573                         if (++vl_idx < *prividx)
1574                                 continue;
1575                         memset(&vxi, 0, sizeof(vxi));
1576                         vxi.vid = v->vid;
1577                         vxi.flags = v->flags;
1578                         if (v->vid == pvid)
1579                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1580                         br_vlan_get_stats(v, &stats);
1581                         vxi.rx_bytes = stats.rx_bytes;
1582                         vxi.rx_packets = stats.rx_packets;
1583                         vxi.tx_bytes = stats.tx_bytes;
1584                         vxi.tx_packets = stats.tx_packets;
1585
1586                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1587                                 goto nla_put_failure;
1588                 }
1589         }
1590
1591 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1592         if (++vl_idx >= *prividx) {
1593                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1594                                         sizeof(struct br_mcast_stats),
1595                                         BRIDGE_XSTATS_PAD);
1596                 if (!nla)
1597                         goto nla_put_failure;
1598                 br_multicast_get_stats(br, p, nla_data(nla));
1599         }
1600 #endif
1601         nla_nest_end(skb, nest);
1602         *prividx = 0;
1603
1604         return 0;
1605
1606 nla_put_failure:
1607         nla_nest_end(skb, nest);
1608         *prividx = vl_idx;
1609
1610         return -EMSGSIZE;
1611 }
1612
1613 static struct rtnl_af_ops br_af_ops __read_mostly = {
1614         .family                 = AF_BRIDGE,
1615         .get_link_af_size       = br_get_link_af_size_filtered,
1616 };
1617
1618 struct rtnl_link_ops br_link_ops __read_mostly = {
1619         .kind                   = "bridge",
1620         .priv_size              = sizeof(struct net_bridge),
1621         .setup                  = br_dev_setup,
1622         .maxtype                = IFLA_BR_MAX,
1623         .policy                 = br_policy,
1624         .validate               = br_validate,
1625         .newlink                = br_dev_newlink,
1626         .changelink             = br_changelink,
1627         .dellink                = br_dev_delete,
1628         .get_size               = br_get_size,
1629         .fill_info              = br_fill_info,
1630         .fill_linkxstats        = br_fill_linkxstats,
1631         .get_linkxstats_size    = br_get_linkxstats_size,
1632
1633         .slave_maxtype          = IFLA_BRPORT_MAX,
1634         .slave_policy           = br_port_policy,
1635         .slave_changelink       = br_port_slave_changelink,
1636         .get_slave_size         = br_port_get_slave_size,
1637         .fill_slave_info        = br_port_fill_slave_info,
1638 };
1639
1640 int __init br_netlink_init(void)
1641 {
1642         int err;
1643
1644         br_mdb_init();
1645         rtnl_af_register(&br_af_ops);
1646
1647         err = rtnl_link_register(&br_link_ops);
1648         if (err)
1649                 goto out_af;
1650
1651         return 0;
1652
1653 out_af:
1654         rtnl_af_unregister(&br_af_ops);
1655         br_mdb_uninit();
1656         return err;
1657 }
1658
1659 void br_netlink_fini(void)
1660 {
1661         br_mdb_uninit();
1662         rtnl_af_unregister(&br_af_ops);
1663         rtnl_link_unregister(&br_link_ops);
1664 }