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