net/bridge/br_netlink.c

   1 /*
   2  *      Bridge netlink control interface
   3  *
   4  *      Authors:
   5  *      Stephen Hemminger               <[email protected]>
   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                         struct netlink_ext_ack *extack)
 530 {
 531         bool curr_change;
 532         int err = 0;
 533
 534         switch (cmd) {
 535         case RTM_SETLINK:
 536                 if (p) {
 537                         /* if the MASTER flag is set this will act on the global
 538                          * per-VLAN entry as well
 539                          */
 540                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
 541                                            &curr_change, extack);
 542                 } else {
 543                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 544                         err = br_vlan_add(br, vinfo->vid, vinfo->flags,
 545                                           &curr_change, extack);
 546                 }
 547                 if (curr_change)
 548                         *changed = true;
 549                 break;
 550
 551         case RTM_DELLINK:
 552                 if (p) {
 553                         if (!nbp_vlan_delete(p, vinfo->vid))
 554                                 *changed = true;
 555
 556                         if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
 557                             !br_vlan_delete(p->br, vinfo->vid))
 558                                 *changed = true;
 559                 } else if (!br_vlan_delete(br, vinfo->vid)) {
 560                         *changed = true;
 561                 }
 562                 break;
 563         }
 564
 565         return err;
 566 }
 567
 568 static int br_process_vlan_info(struct net_bridge *br,
 569                                 struct net_bridge_port *p, int cmd,
 570                                 struct bridge_vlan_info *vinfo_curr,
 571                                 struct bridge_vlan_info **vinfo_last,
 572                                 bool *changed,
 573                                 struct netlink_ext_ack *extack)
 574 {
 575         if (!vinfo_curr->vid || vinfo_curr->vid >= VLAN_VID_MASK)
 576                 return -EINVAL;
 577
 578         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 579                 /* check if we are already processing a range */
 580                 if (*vinfo_last)
 581                         return -EINVAL;
 582                 *vinfo_last = vinfo_curr;
 583                 /* don't allow range of pvids */
 584                 if ((*vinfo_last)->flags & BRIDGE_VLAN_INFO_PVID)
 585                         return -EINVAL;
 586                 return 0;
 587         }
 588
 589         if (*vinfo_last) {
 590                 struct bridge_vlan_info tmp_vinfo;
 591                 int v, err;
 592
 593                 if (!(vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END))
 594                         return -EINVAL;
 595
 596                 if (vinfo_curr->vid <= (*vinfo_last)->vid)
 597                         return -EINVAL;
 598
 599                 memcpy(&tmp_vinfo, *vinfo_last,
 600                        sizeof(struct bridge_vlan_info));
 601                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
 602                         tmp_vinfo.vid = v;
 603                         err = br_vlan_info(br, p, cmd, &tmp_vinfo, changed,
 604                                            extack);
 605                         if (err)
 606                                 break;
 607                 }
 608                 *vinfo_last = NULL;
 609
 610                 return err;
 611         }
 612
 613         return br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
 614 }
 615
 616 static int br_afspec(struct net_bridge *br,
 617                      struct net_bridge_port *p,
 618                      struct nlattr *af_spec,
 619                      int cmd, bool *changed,
 620                      struct netlink_ext_ack *extack)
 621 {
 622         struct bridge_vlan_info *vinfo_curr = NULL;
 623         struct bridge_vlan_info *vinfo_last = NULL;
 624         struct nlattr *attr;
 625         struct vtunnel_info tinfo_last = {};
 626         struct vtunnel_info tinfo_curr = {};
 627         int err = 0, rem;
 628
 629         nla_for_each_nested(attr, af_spec, rem) {
 630                 err = 0;
 631                 switch (nla_type(attr)) {
 632                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
 633                         if (!p || !(p->flags & BR_VLAN_TUNNEL))
 634                                 return -EINVAL;
 635                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
 636                         if (err)
 637                                 return err;
 638                         err = br_process_vlan_tunnel_info(br, p, cmd,
 639                                                           &tinfo_curr,
 640                                                           &tinfo_last,
 641                                                           changed);
 642                         if (err)
 643                                 return err;
 644                         break;
 645                 case IFLA_BRIDGE_VLAN_INFO:
 646                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 647                                 return -EINVAL;
 648                         vinfo_curr = nla_data(attr);
 649                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
 650                                                    &vinfo_last, changed,
 651                                                    extack);
 652                         if (err)
 653                                 return err;
 654                         break;
 655                 }
 656         }
 657
 658         return err;
 659 }
 660
 661 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 662         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 663         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 664         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 665         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 666         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 667         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 668         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 669         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 670         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 671         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 672         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 673         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 674         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
 675         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
 676         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
 677         [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
 678         [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
 679         [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
 680         [IFLA_BRPORT_ISOLATED]  = { .type = NLA_U8 },
 681         [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
 682 };
 683
 684 /* Change the state of the port and notify spanning tree */
 685 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 686 {
 687         if (state > BR_STATE_BLOCKING)
 688                 return -EINVAL;
 689
 690         /* if kernel STP is running, don't allow changes */
 691         if (p->br->stp_enabled == BR_KERNEL_STP)
 692                 return -EBUSY;
 693
 694         /* if device is not up, change is not allowed
 695          * if link is not present, only allowable state is disabled
 696          */
 697         if (!netif_running(p->dev) ||
 698             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 699                 return -ENETDOWN;
 700
 701         br_set_state(p, state);
 702         br_port_state_selection(p->br);
 703         return 0;
 704 }
 705
 706 /* Set/clear or port flags based on attribute */
 707 static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 708                             int attrtype, unsigned long mask)
 709 {
 710         unsigned long flags;
 711         int err;
 712
 713         if (!tb[attrtype])
 714                 return 0;
 715
 716         if (nla_get_u8(tb[attrtype]))
 717                 flags = p->flags | mask;
 718         else
 719                 flags = p->flags & ~mask;
 720
 721         err = br_switchdev_set_port_flag(p, flags, mask);
 722         if (err)
 723                 return err;
 724
 725         p->flags = flags;
 726         return 0;
 727 }
 728
 729 /* Process bridge protocol info on port */
 730 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 731 {
 732         unsigned long old_flags = p->flags;
 733         bool br_vlan_tunnel_old = false;
 734         int err;
 735
 736         err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 737         if (err)
 738                 return err;
 739
 740         err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 741         if (err)
 742                 return err;
 743
 744         err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 745         if (err)
 746                 return err;
 747
 748         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 749         if (err)
 750                 return err;
 751
 752         err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 753         if (err)
 754                 return err;
 755
 756         err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 757         if (err)
 758                 return err;
 759
 760         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
 761         if (err)
 762                 return err;
 763
 764         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
 765         if (err)
 766                 return err;
 767
 768         err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
 769         if (err)
 770                 return err;
 771
 772         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 773         if (err)
 774                 return err;
 775
 776         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 777         if (err)
 778                 return err;
 779
 780         br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
 781         err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
 782         if (err)
 783                 return err;
 784
 785         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
 786                 nbp_vlan_tunnel_info_flush(p);
 787
 788         if (tb[IFLA_BRPORT_COST]) {
 789                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 790                 if (err)
 791                         return err;
 792         }
 793
 794         if (tb[IFLA_BRPORT_PRIORITY]) {
 795                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 796                 if (err)
 797                         return err;
 798         }
 799
 800         if (tb[IFLA_BRPORT_STATE]) {
 801                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 802                 if (err)
 803                         return err;
 804         }
 805
 806         if (tb[IFLA_BRPORT_FLUSH])
 807                 br_fdb_delete_by_port(p->br, p, 0, 0);
 808
 809 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 810         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 811                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 812
 813                 err = br_multicast_set_port_router(p, mcast_router);
 814                 if (err)
 815                         return err;
 816         }
 817 #endif
 818
 819         if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
 820                 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
 821
 822                 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
 823                         return -EINVAL;
 824                 p->group_fwd_mask = fwd_mask;
 825         }
 826
 827         err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
 828                                BR_NEIGH_SUPPRESS);
 829         if (err)
 830                 return err;
 831
 832         err = br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
 833         if (err)
 834                 return err;
 835
 836         if (tb[IFLA_BRPORT_BACKUP_PORT]) {
 837                 struct net_device *backup_dev = NULL;
 838                 u32 backup_ifindex;
 839
 840                 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
 841                 if (backup_ifindex) {
 842                         backup_dev = __dev_get_by_index(dev_net(p->dev),
 843                                                         backup_ifindex);
 844                         if (!backup_dev)
 845                                 return -ENOENT;
 846                 }
 847
 848                 err = nbp_backup_change(p, backup_dev);
 849                 if (err)
 850                         return err;
 851         }
 852
 853         br_port_flags_change(p, old_flags ^ p->flags);
 854         return 0;
 855 }
 856
 857 /* Change state and parameters on port. */
 858 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags,
 859                struct netlink_ext_ack *extack)
 860 {
 861         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
 862         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 863         struct net_bridge_port *p;
 864         struct nlattr *protinfo;
 865         struct nlattr *afspec;
 866         bool changed = false;
 867         int err = 0;
 868
 869         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 870         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 871         if (!protinfo && !afspec)
 872                 return 0;
 873
 874         p = br_port_get_rtnl(dev);
 875         /* We want to accept dev as bridge itself if the AF_SPEC
 876          * is set to see if someone is setting vlan info on the bridge
 877          */
 878         if (!p && !afspec)
 879                 return -EINVAL;
 880
 881         if (p && protinfo) {
 882                 if (protinfo->nla_type & NLA_F_NESTED) {
 883                         err = nla_parse_nested(tb, IFLA_BRPORT_MAX, protinfo,
 884                                                br_port_policy, NULL);
 885                         if (err)
 886                                 return err;
 887
 888                         spin_lock_bh(&p->br->lock);
 889                         err = br_setport(p, tb);
 890                         spin_unlock_bh(&p->br->lock);
 891                 } else {
 892                         /* Binary compatibility with old RSTP */
 893                         if (nla_len(protinfo) < sizeof(u8))
 894                                 return -EINVAL;
 895
 896                         spin_lock_bh(&p->br->lock);
 897                         err = br_set_port_state(p, nla_get_u8(protinfo));
 898                         spin_unlock_bh(&p->br->lock);
 899                 }
 900                 if (err)
 901                         goto out;
 902                 changed = true;
 903         }
 904
 905         if (afspec)
 906                 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
 907
 908         if (changed)
 909                 br_ifinfo_notify(RTM_NEWLINK, br, p);
 910 out:
 911         return err;
 912 }
 913
 914 /* Delete port information */
 915 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 916 {
 917         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
 918         struct net_bridge_port *p;
 919         struct nlattr *afspec;
 920         bool changed = false;
 921         int err = 0;
 922
 923         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 924         if (!afspec)
 925                 return 0;
 926
 927         p = br_port_get_rtnl(dev);
 928         /* We want to accept dev as bridge itself as well */
 929         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
 930                 return -EINVAL;
 931
 932         err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL);
 933         if (changed)
 934                 /* Send RTM_NEWLINK because userspace
 935                  * expects RTM_NEWLINK for vlan dels
 936                  */
 937                 br_ifinfo_notify(RTM_NEWLINK, br, p);
 938
 939         return err;
 940 }
 941
 942 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
 943                        struct netlink_ext_ack *extack)
 944 {
 945         if (tb[IFLA_ADDRESS]) {
 946                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 947                         return -EINVAL;
 948                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 949                         return -EADDRNOTAVAIL;
 950         }
 951
 952         if (!data)
 953                 return 0;
 954
 955 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 956         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 957                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
 958                 case htons(ETH_P_8021Q):
 959                 case htons(ETH_P_8021AD):
 960                         break;
 961                 default:
 962                         return -EPROTONOSUPPORT;
 963                 }
 964         }
 965
 966         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 967                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 968
 969                 if (defpvid >= VLAN_VID_MASK)
 970                         return -EINVAL;
 971         }
 972 #endif
 973
 974         return 0;
 975 }
 976
 977 static int br_port_slave_changelink(struct net_device *brdev,
 978                                     struct net_device *dev,
 979                                     struct nlattr *tb[],
 980                                     struct nlattr *data[],
 981                                     struct netlink_ext_ack *extack)
 982 {
 983         struct net_bridge *br = netdev_priv(brdev);
 984         int ret;
 985
 986         if (!data)
 987                 return 0;
 988
 989         spin_lock_bh(&br->lock);
 990         ret = br_setport(br_port_get_rtnl(dev), data);
 991         spin_unlock_bh(&br->lock);
 992
 993         return ret;
 994 }
 995
 996 static int br_port_fill_slave_info(struct sk_buff *skb,
 997                                    const struct net_device *brdev,
 998                                    const struct net_device *dev)
 999 {
1000         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
1001 }
1002
1003 static size_t br_port_get_slave_size(const struct net_device *brdev,
1004                                      const struct net_device *dev)
1005 {
1006         return br_port_info_size();
1007 }
1008
1009 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1010         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1011         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
1012         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
1013         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1014         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1015         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1016         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1017         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1018         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1019         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1020                                  .len  = ETH_ALEN },
1021         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1022         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1023         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1024         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1025         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1026         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1027         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1028         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1029         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1030         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1031         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1032         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1033         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1034         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1035         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1036         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1037         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1038         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1039         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1040         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1041         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1042         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1043         [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1044         [IFLA_BR_MULTI_BOOLOPT] = { .type = NLA_EXACT_LEN,
1045                                     .len = sizeof(struct br_boolopt_multi) },
1046 };
1047
1048 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1049                          struct nlattr *data[],
1050                          struct netlink_ext_ack *extack)
1051 {
1052         struct net_bridge *br = netdev_priv(brdev);
1053         int err;
1054
1055         if (!data)
1056                 return 0;
1057
1058         if (data[IFLA_BR_FORWARD_DELAY]) {
1059                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1060                 if (err)
1061                         return err;
1062         }
1063
1064         if (data[IFLA_BR_HELLO_TIME]) {
1065                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1066                 if (err)
1067                         return err;
1068         }
1069
1070         if (data[IFLA_BR_MAX_AGE]) {
1071                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1072                 if (err)
1073                         return err;
1074         }
1075
1076         if (data[IFLA_BR_AGEING_TIME]) {
1077                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1078                 if (err)
1079                         return err;
1080         }
1081
1082         if (data[IFLA_BR_STP_STATE]) {
1083                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1084
1085                 br_stp_set_enabled(br, stp_enabled);
1086         }
1087
1088         if (data[IFLA_BR_PRIORITY]) {
1089                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1090
1091                 br_stp_set_bridge_priority(br, priority);
1092         }
1093
1094         if (data[IFLA_BR_VLAN_FILTERING]) {
1095                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1096
1097                 err = __br_vlan_filter_toggle(br, vlan_filter);
1098                 if (err)
1099                         return err;
1100         }
1101
1102 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1103         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1104                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1105
1106                 err = __br_vlan_set_proto(br, vlan_proto);
1107                 if (err)
1108                         return err;
1109         }
1110
1111         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1112                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1113
1114                 err = __br_vlan_set_default_pvid(br, defpvid, extack);
1115                 if (err)
1116                         return err;
1117         }
1118
1119         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1120                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1121
1122                 err = br_vlan_set_stats(br, vlan_stats);
1123                 if (err)
1124                         return err;
1125         }
1126
1127         if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1128                 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1129
1130                 err = br_vlan_set_stats_per_port(br, per_port);
1131                 if (err)
1132                         return err;
1133         }
1134 #endif
1135
1136         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1137                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1138
1139                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1140                         return -EINVAL;
1141                 br->group_fwd_mask = fwd_mask;
1142         }
1143
1144         if (data[IFLA_BR_GROUP_ADDR]) {
1145                 u8 new_addr[ETH_ALEN];
1146
1147                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1148                         return -EINVAL;
1149                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1150                 if (!is_link_local_ether_addr(new_addr))
1151                         return -EINVAL;
1152                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1153                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1154                     new_addr[5] == 3)           /* 802.1X PAE address */
1155                         return -EINVAL;
1156                 spin_lock_bh(&br->lock);
1157                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1158                 spin_unlock_bh(&br->lock);
1159                 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1160                 br_recalculate_fwd_mask(br);
1161         }
1162
1163         if (data[IFLA_BR_FDB_FLUSH])
1164                 br_fdb_flush(br);
1165
1166 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1167         if (data[IFLA_BR_MCAST_ROUTER]) {
1168                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1169
1170                 err = br_multicast_set_router(br, multicast_router);
1171                 if (err)
1172                         return err;
1173         }
1174
1175         if (data[IFLA_BR_MCAST_SNOOPING]) {
1176                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1177
1178                 br_multicast_toggle(br, mcast_snooping);
1179         }
1180
1181         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1182                 u8 val;
1183
1184                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1185                 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1186         }
1187
1188         if (data[IFLA_BR_MCAST_QUERIER]) {
1189                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1190
1191                 err = br_multicast_set_querier(br, mcast_querier);
1192                 if (err)
1193                         return err;
1194         }
1195
1196         if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
1197                 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
1198                         RHT_ELASTICITY);
1199
1200         if (data[IFLA_BR_MCAST_HASH_MAX])
1201                 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1202
1203         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1204                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1205
1206                 br->multicast_last_member_count = val;
1207         }
1208
1209         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1210                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1211
1212                 br->multicast_startup_query_count = val;
1213         }
1214
1215         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1216                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1217
1218                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1219         }
1220
1221         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1222                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1223
1224                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1225         }
1226
1227         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1228                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1229
1230                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1231         }
1232
1233         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1234                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1235
1236                 br->multicast_query_interval = clock_t_to_jiffies(val);
1237         }
1238
1239         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1240                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1241
1242                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1243         }
1244
1245         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1246                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1247
1248                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1249         }
1250
1251         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1252                 __u8 mcast_stats;
1253
1254                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1255                 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1256         }
1257
1258         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1259                 __u8 igmp_version;
1260
1261                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1262                 err = br_multicast_set_igmp_version(br, igmp_version);
1263                 if (err)
1264                         return err;
1265         }
1266
1267 #if IS_ENABLED(CONFIG_IPV6)
1268         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1269                 __u8 mld_version;
1270
1271                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1272                 err = br_multicast_set_mld_version(br, mld_version);
1273                 if (err)
1274                         return err;
1275         }
1276 #endif
1277 #endif
1278 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1279         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1280                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1281
1282                 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1283         }
1284
1285         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1286                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1287
1288                 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1289         }
1290
1291         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1292                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1293
1294                 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1295         }
1296 #endif
1297
1298         if (data[IFLA_BR_MULTI_BOOLOPT]) {
1299                 struct br_boolopt_multi *bm;
1300
1301                 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
1302                 err = br_boolopt_multi_toggle(br, bm, extack);
1303                 if (err)
1304                         return err;
1305         }
1306
1307         return 0;
1308 }
1309
1310 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1311                           struct nlattr *tb[], struct nlattr *data[],
1312                           struct netlink_ext_ack *extack)
1313 {
1314         struct net_bridge *br = netdev_priv(dev);
1315         int err;
1316
1317         err = register_netdevice(dev);
1318         if (err)
1319                 return err;
1320
1321         if (tb[IFLA_ADDRESS]) {
1322                 spin_lock_bh(&br->lock);
1323                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1324                 spin_unlock_bh(&br->lock);
1325         }
1326
1327         err = br_changelink(dev, tb, data, extack);
1328         if (err)
1329                 br_dev_delete(dev, NULL);
1330
1331         return err;
1332 }
1333
1334 static size_t br_get_size(const struct net_device *brdev)
1335 {
1336         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1337                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1338                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1339                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1340                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1341                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1342                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1343 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1344                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1345                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1346                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1347                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_PER_PORT */
1348 #endif
1349                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1350                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1351                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1352                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1353                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1354                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1355                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1356                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1357                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1358                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1359                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1360                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1361 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1362                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1363                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1364                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1365                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1366                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1367                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1368                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1369                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1370                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1371                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1372                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1373                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1374                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1375                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1376                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1377                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1378                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1379 #endif
1380 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1381                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1382                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1383                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1384 #endif
1385                nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
1386                0;
1387 }
1388
1389 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1390 {
1391         struct net_bridge *br = netdev_priv(brdev);
1392         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1393         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1394         u32 age_time = jiffies_to_clock_t(br->max_age);
1395         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1396         u32 stp_enabled = br->stp_enabled;
1397         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1398         u8 vlan_enabled = br_vlan_enabled(br->dev);
1399         struct br_boolopt_multi bm;
1400         u64 clockval;
1401
1402         clockval = br_timer_value(&br->hello_timer);
1403         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1404                 return -EMSGSIZE;
1405         clockval = br_timer_value(&br->tcn_timer);
1406         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1407                 return -EMSGSIZE;
1408         clockval = br_timer_value(&br->topology_change_timer);
1409         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1410                               IFLA_BR_PAD))
1411                 return -EMSGSIZE;
1412         clockval = br_timer_value(&br->gc_work.timer);
1413         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1414                 return -EMSGSIZE;
1415
1416         br_boolopt_multi_get(br, &bm);
1417         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1418             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1419             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1420             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1421             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1422             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1423             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1424             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1425             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1426                     &br->bridge_id) ||
1427             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1428                     &br->designated_root) ||
1429             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1430             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1431             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1432             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1433                        br->topology_change_detected) ||
1434             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
1435             nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
1436                 return -EMSGSIZE;
1437
1438 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1439         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1440             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1441             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1442                        br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1443             nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1444                        br_opt_get(br, IFLA_BR_VLAN_STATS_PER_PORT)))
1445                 return -EMSGSIZE;
1446 #endif
1447 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1448         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1449             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1450                        br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1451             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1452                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1453             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1454                        br_opt_get(br, BROPT_MULTICAST_QUERIER)) ||
1455             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1456                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1457             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
1458             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1459             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1460                         br->multicast_last_member_count) ||
1461             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1462                         br->multicast_startup_query_count) ||
1463             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1464                        br->multicast_igmp_version))
1465                 return -EMSGSIZE;
1466 #if IS_ENABLED(CONFIG_IPV6)
1467         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1468                        br->multicast_mld_version))
1469                 return -EMSGSIZE;
1470 #endif
1471         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1472         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1473                               IFLA_BR_PAD))
1474                 return -EMSGSIZE;
1475         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1476         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1477                               IFLA_BR_PAD))
1478                 return -EMSGSIZE;
1479         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1480         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1481                               IFLA_BR_PAD))
1482                 return -EMSGSIZE;
1483         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1484         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1485                               IFLA_BR_PAD))
1486                 return -EMSGSIZE;
1487         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1488         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1489                               IFLA_BR_PAD))
1490                 return -EMSGSIZE;
1491         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1492         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1493                               IFLA_BR_PAD))
1494                 return -EMSGSIZE;
1495 #endif
1496 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1497         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1498                        br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1499             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1500                        br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1501             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1502                        br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1503                 return -EMSGSIZE;
1504 #endif
1505
1506         return 0;
1507 }
1508
1509 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1510 {
1511         struct net_bridge_port *p = NULL;
1512         struct net_bridge_vlan_group *vg;
1513         struct net_bridge_vlan *v;
1514         struct net_bridge *br;
1515         int numvls = 0;
1516
1517         switch (attr) {
1518         case IFLA_STATS_LINK_XSTATS:
1519                 br = netdev_priv(dev);
1520                 vg = br_vlan_group(br);
1521                 break;
1522         case IFLA_STATS_LINK_XSTATS_SLAVE:
1523                 p = br_port_get_rtnl(dev);
1524                 if (!p)
1525                         return 0;
1526                 br = p->br;
1527                 vg = nbp_vlan_group(p);
1528                 break;
1529         default:
1530                 return 0;
1531         }
1532
1533         if (vg) {
1534                 /* we need to count all, even placeholder entries */
1535                 list_for_each_entry(v, &vg->vlan_list, vlist)
1536                         numvls++;
1537         }
1538
1539         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1540                nla_total_size(sizeof(struct br_mcast_stats)) +
1541                nla_total_size(0);
1542 }
1543
1544 static int br_fill_linkxstats(struct sk_buff *skb,
1545                               const struct net_device *dev,
1546                               int *prividx, int attr)
1547 {
1548         struct nlattr *nla __maybe_unused;
1549         struct net_bridge_port *p = NULL;
1550         struct net_bridge_vlan_group *vg;
1551         struct net_bridge_vlan *v;
1552         struct net_bridge *br;
1553         struct nlattr *nest;
1554         int vl_idx = 0;
1555
1556         switch (attr) {
1557         case IFLA_STATS_LINK_XSTATS:
1558                 br = netdev_priv(dev);
1559                 vg = br_vlan_group(br);
1560                 break;
1561         case IFLA_STATS_LINK_XSTATS_SLAVE:
1562                 p = br_port_get_rtnl(dev);
1563                 if (!p)
1564                         return 0;
1565                 br = p->br;
1566                 vg = nbp_vlan_group(p);
1567                 break;
1568         default:
1569                 return -EINVAL;
1570         }
1571
1572         nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE);
1573         if (!nest)
1574                 return -EMSGSIZE;
1575
1576         if (vg) {
1577                 u16 pvid;
1578
1579                 pvid = br_get_pvid(vg);
1580                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1581                         struct bridge_vlan_xstats vxi;
1582                         struct br_vlan_stats stats;
1583
1584                         if (++vl_idx < *prividx)
1585                                 continue;
1586                         memset(&vxi, 0, sizeof(vxi));
1587                         vxi.vid = v->vid;
1588                         vxi.flags = v->flags;
1589                         if (v->vid == pvid)
1590                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1591                         br_vlan_get_stats(v, &stats);
1592                         vxi.rx_bytes = stats.rx_bytes;
1593                         vxi.rx_packets = stats.rx_packets;
1594                         vxi.tx_bytes = stats.tx_bytes;
1595                         vxi.tx_packets = stats.tx_packets;
1596
1597                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1598                                 goto nla_put_failure;
1599                 }
1600         }
1601
1602 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1603         if (++vl_idx >= *prividx) {
1604                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1605                                         sizeof(struct br_mcast_stats),
1606                                         BRIDGE_XSTATS_PAD);
1607                 if (!nla)
1608                         goto nla_put_failure;
1609                 br_multicast_get_stats(br, p, nla_data(nla));
1610         }
1611 #endif
1612         nla_nest_end(skb, nest);
1613         *prividx = 0;
1614
1615         return 0;
1616
1617 nla_put_failure:
1618         nla_nest_end(skb, nest);
1619         *prividx = vl_idx;
1620
1621         return -EMSGSIZE;
1622 }
1623
1624 static struct rtnl_af_ops br_af_ops __read_mostly = {
1625         .family                 = AF_BRIDGE,
1626         .get_link_af_size       = br_get_link_af_size_filtered,
1627 };
1628
1629 struct rtnl_link_ops br_link_ops __read_mostly = {
1630         .kind                   = "bridge",
1631         .priv_size              = sizeof(struct net_bridge),
1632         .setup                  = br_dev_setup,
1633         .maxtype                = IFLA_BR_MAX,
1634         .policy                 = br_policy,
1635         .validate               = br_validate,
1636         .newlink                = br_dev_newlink,
1637         .changelink             = br_changelink,
1638         .dellink                = br_dev_delete,
1639         .get_size               = br_get_size,
1640         .fill_info              = br_fill_info,
1641         .fill_linkxstats        = br_fill_linkxstats,
1642         .get_linkxstats_size    = br_get_linkxstats_size,
1643
1644         .slave_maxtype          = IFLA_BRPORT_MAX,
1645         .slave_policy           = br_port_policy,
1646         .slave_changelink       = br_port_slave_changelink,
1647         .get_slave_size         = br_port_get_slave_size,
1648         .fill_slave_info        = br_port_fill_slave_info,
1649 };
1650
1651 int __init br_netlink_init(void)
1652 {
1653         int err;
1654
1655         br_mdb_init();
1656         rtnl_af_register(&br_af_ops);
1657
1658         err = rtnl_link_register(&br_link_ops);
1659         if (err)
1660                 goto out_af;
1661
1662         return 0;
1663
1664 out_af:
1665         rtnl_af_unregister(&br_af_ops);
1666         br_mdb_uninit();
1667         return err;
1668 }
1669
1670 void br_netlink_fini(void)
1671 {
1672         br_mdb_uninit();
1673         rtnl_af_unregister(&br_af_ops);
1674         rtnl_link_unregister(&br_link_ops);
1675 }