net/bridge/br_netlink.c

   1 /*
   2  *      Bridge netlink control interface
   3  *
   4  *      Authors:
   5  *      Stephen Hemminger               <shemminger@osdl.org>
   6  *
   7  *      This program is free software; you can redistribute it and/or
   8  *      modify it under the terms of the GNU General Public License
   9  *      as published by the Free Software Foundation; either version
  10  *      2 of the License, or (at your option) any later version.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/slab.h>
  15 #include <linux/etherdevice.h>
  16 #include <net/rtnetlink.h>
  17 #include <net/net_namespace.h>
  18 #include <net/sock.h>
  19 #include <uapi/linux/if_bridge.h>
  20
  21 #include "br_private.h"
  22 #include "br_private_stp.h"
  23
  24 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  25                                 u32 filter_mask)
  26 {
  27         struct net_bridge_vlan *v;
  28         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
  29         u16 flags, pvid;
  30         int num_vlans = 0;
  31
  32         if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
  33                 return 0;
  34
  35         pvid = br_get_pvid(vg);
  36         /* Count number of vlan infos */
  37         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
  38                 flags = 0;
  39                 /* only a context, bridge vlan not activated */
  40                 if (!br_vlan_should_use(v))
  41                         continue;
  42                 if (v->vid == pvid)
  43                         flags |= BRIDGE_VLAN_INFO_PVID;
  44
  45                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
  46                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
  47
  48                 if (vid_range_start == 0) {
  49                         goto initvars;
  50                 } else if ((v->vid - vid_range_end) == 1 &&
  51                         flags == vid_range_flags) {
  52                         vid_range_end = v->vid;
  53                         continue;
  54                 } else {
  55                         if ((vid_range_end - vid_range_start) > 0)
  56                                 num_vlans += 2;
  57                         else
  58                                 num_vlans += 1;
  59                 }
  60 initvars:
  61                 vid_range_start = v->vid;
  62                 vid_range_end = v->vid;
  63                 vid_range_flags = flags;
  64         }
  65
  66         if (vid_range_start != 0) {
  67                 if ((vid_range_end - vid_range_start) > 0)
  68                         num_vlans += 2;
  69                 else
  70                         num_vlans += 1;
  71         }
  72
  73         return num_vlans;
  74 }
  75
  76 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  77                                  u32 filter_mask)
  78 {
  79         int num_vlans;
  80
  81         if (!vg)
  82                 return 0;
  83
  84         if (filter_mask & RTEXT_FILTER_BRVLAN)
  85                 return vg->num_vlans;
  86
  87         rcu_read_lock();
  88         num_vlans = __get_num_vlan_infos(vg, filter_mask);
  89         rcu_read_unlock();
  90
  91         return num_vlans;
  92 }
  93
  94 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
  95                                            u32 filter_mask)
  96 {
  97         struct net_bridge_vlan_group *vg = NULL;
  98         struct net_bridge_port *p;
  99         struct net_bridge *br;
 100         int num_vlan_infos;
 101
 102         rcu_read_lock();
 103         if (br_port_exists(dev)) {
 104                 p = br_port_get_rcu(dev);
 105                 vg = nbp_vlan_group(p);
 106         } else if (dev->priv_flags & IFF_EBRIDGE) {
 107                 br = netdev_priv(dev);
 108                 vg = br_vlan_group(br);
 109         }
 110         num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
 111         rcu_read_unlock();
 112
 113         /* Each VLAN is returned in bridge_vlan_info along with flags */
 114         return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
 115 }
 116
 117 static inline size_t br_port_info_size(void)
 118 {
 119         return nla_total_size(1)        /* IFLA_BRPORT_STATE  */
 120                 + nla_total_size(2)     /* IFLA_BRPORT_PRIORITY */
 121                 + nla_total_size(4)     /* IFLA_BRPORT_COST */
 122                 + nla_total_size(1)     /* IFLA_BRPORT_MODE */
 123                 + nla_total_size(1)     /* IFLA_BRPORT_GUARD */
 124                 + nla_total_size(1)     /* IFLA_BRPORT_PROTECT */
 125                 + nla_total_size(1)     /* IFLA_BRPORT_FAST_LEAVE */
 126                 + nla_total_size(1)     /* IFLA_BRPORT_LEARNING */
 127                 + nla_total_size(1)     /* IFLA_BRPORT_UNICAST_FLOOD */
 128                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP */
 129                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP_WIFI */
 130                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
 131                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
 132                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_PORT */
 133                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_COST */
 134                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_ID */
 135                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_NO */
 136                 + 0;
 137 }
 138
 139 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
 140 {
 141         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
 142                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
 143                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
 144                 + nla_total_size(4) /* IFLA_MASTER */
 145                 + nla_total_size(4) /* IFLA_MTU */
 146                 + nla_total_size(4) /* IFLA_LINK */
 147                 + nla_total_size(1) /* IFLA_OPERSTATE */
 148                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
 149                 + nla_total_size(br_get_link_af_size_filtered(dev,
 150                                  filter_mask)); /* IFLA_AF_SPEC */
 151 }
 152
 153 static int br_port_fill_attrs(struct sk_buff *skb,
 154                               const struct net_bridge_port *p)
 155 {
 156         u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
 157
 158         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
 159             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
 160             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
 161             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
 162             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
 163             nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
 164             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
 165             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
 166             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
 167             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
 168             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
 169                        !!(p->flags & BR_PROXYARP_WIFI)) ||
 170             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
 171                     &p->designated_root) ||
 172             nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
 173                     &p->designated_bridge) ||
 174             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
 175             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
 176             nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
 177             nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no))
 178                 return -EMSGSIZE;
 179
 180         return 0;
 181 }
 182
 183 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
 184                                     u16 vid_end, u16 flags)
 185 {
 186         struct  bridge_vlan_info vinfo;
 187
 188         if ((vid_end - vid_start) > 0) {
 189                 /* add range to skb */
 190                 vinfo.vid = vid_start;
 191                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
 192                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 193                             sizeof(vinfo), &vinfo))
 194                         goto nla_put_failure;
 195
 196                 vinfo.vid = vid_end;
 197                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
 198                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 199                             sizeof(vinfo), &vinfo))
 200                         goto nla_put_failure;
 201         } else {
 202                 vinfo.vid = vid_start;
 203                 vinfo.flags = flags;
 204                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 205                             sizeof(vinfo), &vinfo))
 206                         goto nla_put_failure;
 207         }
 208
 209         return 0;
 210
 211 nla_put_failure:
 212         return -EMSGSIZE;
 213 }
 214
 215 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
 216                                          struct net_bridge_vlan_group *vg)
 217 {
 218         struct net_bridge_vlan *v;
 219         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 220         u16 flags, pvid;
 221         int err = 0;
 222
 223         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
 224          * and mark vlan info with begin and end flags
 225          * if vlaninfo represents a range
 226          */
 227         pvid = br_get_pvid(vg);
 228         list_for_each_entry(v, &vg->vlan_list, vlist) {
 229                 flags = 0;
 230                 if (!br_vlan_should_use(v))
 231                         continue;
 232                 if (v->vid == pvid)
 233                         flags |= BRIDGE_VLAN_INFO_PVID;
 234
 235                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 236                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 237
 238                 if (vid_range_start == 0) {
 239                         goto initvars;
 240                 } else if ((v->vid - vid_range_end) == 1 &&
 241                         flags == vid_range_flags) {
 242                         vid_range_end = v->vid;
 243                         continue;
 244                 } else {
 245                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 246                                                        vid_range_end,
 247                                                        vid_range_flags);
 248                         if (err)
 249                                 return err;
 250                 }
 251
 252 initvars:
 253                 vid_range_start = v->vid;
 254                 vid_range_end = v->vid;
 255                 vid_range_flags = flags;
 256         }
 257
 258         if (vid_range_start != 0) {
 259                 /* Call it once more to send any left over vlans */
 260                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 261                                                vid_range_end,
 262                                                vid_range_flags);
 263                 if (err)
 264                         return err;
 265         }
 266
 267         return 0;
 268 }
 269
 270 static int br_fill_ifvlaninfo(struct sk_buff *skb,
 271                               struct net_bridge_vlan_group *vg)
 272 {
 273         struct bridge_vlan_info vinfo;
 274         struct net_bridge_vlan *v;
 275         u16 pvid;
 276
 277         pvid = br_get_pvid(vg);
 278         list_for_each_entry(v, &vg->vlan_list, vlist) {
 279                 if (!br_vlan_should_use(v))
 280                         continue;
 281
 282                 vinfo.vid = v->vid;
 283                 vinfo.flags = 0;
 284                 if (v->vid == pvid)
 285                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
 286
 287                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 288                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 289
 290                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 291                             sizeof(vinfo), &vinfo))
 292                         goto nla_put_failure;
 293         }
 294
 295         return 0;
 296
 297 nla_put_failure:
 298         return -EMSGSIZE;
 299 }
 300
 301 /*
 302  * Create one netlink message for one interface
 303  * Contains port and master info as well as carrier and bridge state.
 304  */
 305 static int br_fill_ifinfo(struct sk_buff *skb,
 306                           struct net_bridge_port *port,
 307                           u32 pid, u32 seq, int event, unsigned int flags,
 308                           u32 filter_mask, const struct net_device *dev)
 309 {
 310         struct net_bridge *br;
 311         struct ifinfomsg *hdr;
 312         struct nlmsghdr *nlh;
 313         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
 314
 315         if (port)
 316                 br = port->br;
 317         else
 318                 br = netdev_priv(dev);
 319
 320         br_debug(br, "br_fill_info event %d port %s master %s\n",
 321                      event, dev->name, br->dev->name);
 322
 323         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
 324         if (nlh == NULL)
 325                 return -EMSGSIZE;
 326
 327         hdr = nlmsg_data(nlh);
 328         hdr->ifi_family = AF_BRIDGE;
 329         hdr->__ifi_pad = 0;
 330         hdr->ifi_type = dev->type;
 331         hdr->ifi_index = dev->ifindex;
 332         hdr->ifi_flags = dev_get_flags(dev);
 333         hdr->ifi_change = 0;
 334
 335         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
 336             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
 337             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
 338             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
 339             (dev->addr_len &&
 340              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
 341             (dev->ifindex != dev_get_iflink(dev) &&
 342              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
 343                 goto nla_put_failure;
 344
 345         if (event == RTM_NEWLINK && port) {
 346                 struct nlattr *nest
 347                         = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
 348
 349                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 350                         goto nla_put_failure;
 351                 nla_nest_end(skb, nest);
 352         }
 353
 354         /* Check if  the VID information is requested */
 355         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
 356             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
 357                 struct net_bridge_vlan_group *vg;
 358                 struct nlattr *af;
 359                 int err;
 360
 361                 if (port)
 362                         vg = nbp_vlan_group(port);
 363                 else
 364                         vg = br_vlan_group(br);
 365
 366                 if (!vg || !vg->num_vlans)
 367                         goto done;
 368
 369                 af = nla_nest_start(skb, IFLA_AF_SPEC);
 370                 if (!af)
 371                         goto nla_put_failure;
 372
 373                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 374                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 375                 else
 376                         err = br_fill_ifvlaninfo(skb, vg);
 377                 if (err)
 378                         goto nla_put_failure;
 379                 nla_nest_end(skb, af);
 380         }
 381
 382 done:
 383         nlmsg_end(skb, nlh);
 384         return 0;
 385
 386 nla_put_failure:
 387         nlmsg_cancel(skb, nlh);
 388         return -EMSGSIZE;
 389 }
 390
 391 /*
 392  * Notify listeners of a change in port information
 393  */
 394 void br_ifinfo_notify(int event, struct net_bridge_port *port)
 395 {
 396         struct net *net;
 397         struct sk_buff *skb;
 398         int err = -ENOBUFS;
 399         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 400
 401         if (!port)
 402                 return;
 403
 404         net = dev_net(port->dev);
 405         br_debug(port->br, "port %u(%s) event %d\n",
 406                  (unsigned int)port->port_no, port->dev->name, event);
 407
 408         skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
 409         if (skb == NULL)
 410                 goto errout;
 411
 412         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
 413         if (err < 0) {
 414                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 415                 WARN_ON(err == -EMSGSIZE);
 416                 kfree_skb(skb);
 417                 goto errout;
 418         }
 419         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 420         return;
 421 errout:
 422         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 423 }
 424
 425
 426 /*
 427  * Dump information about all ports, in response to GETLINK
 428  */
 429 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 430                struct net_device *dev, u32 filter_mask, int nlflags)
 431 {
 432         struct net_bridge_port *port = br_port_get_rtnl(dev);
 433
 434         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 435             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
 436                 return 0;
 437
 438         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 439                               filter_mask, dev);
 440 }
 441
 442 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 443                         int cmd, struct bridge_vlan_info *vinfo)
 444 {
 445         int err = 0;
 446
 447         switch (cmd) {
 448         case RTM_SETLINK:
 449                 if (p) {
 450                         /* if the MASTER flag is set this will act on the global
 451                          * per-VLAN entry as well
 452                          */
 453                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
 454                         if (err)
 455                                 break;
 456                 } else {
 457                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 458                         err = br_vlan_add(br, vinfo->vid, vinfo->flags);
 459                 }
 460                 break;
 461
 462         case RTM_DELLINK:
 463                 if (p) {
 464                         nbp_vlan_delete(p, vinfo->vid);
 465                         if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
 466                                 br_vlan_delete(p->br, vinfo->vid);
 467                 } else {
 468                         br_vlan_delete(br, vinfo->vid);
 469                 }
 470                 break;
 471         }
 472
 473         return err;
 474 }
 475
 476 static int br_afspec(struct net_bridge *br,
 477                      struct net_bridge_port *p,
 478                      struct nlattr *af_spec,
 479                      int cmd)
 480 {
 481         struct bridge_vlan_info *vinfo_start = NULL;
 482         struct bridge_vlan_info *vinfo = NULL;
 483         struct nlattr *attr;
 484         int err = 0;
 485         int rem;
 486
 487         nla_for_each_nested(attr, af_spec, rem) {
 488                 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
 489                         continue;
 490                 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 491                         return -EINVAL;
 492                 vinfo = nla_data(attr);
 493                 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
 494                         return -EINVAL;
 495                 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 496                         if (vinfo_start)
 497                                 return -EINVAL;
 498                         vinfo_start = vinfo;
 499                         continue;
 500                 }
 501
 502                 if (vinfo_start) {
 503                         struct bridge_vlan_info tmp_vinfo;
 504                         int v;
 505
 506                         if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
 507                                 return -EINVAL;
 508
 509                         if (vinfo->vid <= vinfo_start->vid)
 510                                 return -EINVAL;
 511
 512                         memcpy(&tmp_vinfo, vinfo_start,
 513                                sizeof(struct bridge_vlan_info));
 514
 515                         for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
 516                                 tmp_vinfo.vid = v;
 517                                 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
 518                                 if (err)
 519                                         break;
 520                         }
 521                         vinfo_start = NULL;
 522                 } else {
 523                         err = br_vlan_info(br, p, cmd, vinfo);
 524                 }
 525                 if (err)
 526                         break;
 527         }
 528
 529         return err;
 530 }
 531
 532 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 533         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 534         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 535         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 536         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 537         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 538         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 539         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 540         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 541         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 542         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 543         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 544 };
 545
 546 /* Change the state of the port and notify spanning tree */
 547 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 548 {
 549         if (state > BR_STATE_BLOCKING)
 550                 return -EINVAL;
 551
 552         /* if kernel STP is running, don't allow changes */
 553         if (p->br->stp_enabled == BR_KERNEL_STP)
 554                 return -EBUSY;
 555
 556         /* if device is not up, change is not allowed
 557          * if link is not present, only allowable state is disabled
 558          */
 559         if (!netif_running(p->dev) ||
 560             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 561                 return -ENETDOWN;
 562
 563         br_set_state(p, state);
 564         br_log_state(p);
 565         br_port_state_selection(p->br);
 566         return 0;
 567 }
 568
 569 /* Set/clear or port flags based on attribute */
 570 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 571                            int attrtype, unsigned long mask)
 572 {
 573         if (tb[attrtype]) {
 574                 u8 flag = nla_get_u8(tb[attrtype]);
 575                 if (flag)
 576                         p->flags |= mask;
 577                 else
 578                         p->flags &= ~mask;
 579         }
 580 }
 581
 582 /* Process bridge protocol info on port */
 583 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 584 {
 585         int err;
 586         unsigned long old_flags = p->flags;
 587
 588         br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 589         br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 590         br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 591         br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 592         br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 593         br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 594         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 595         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 596
 597         if (tb[IFLA_BRPORT_COST]) {
 598                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 599                 if (err)
 600                         return err;
 601         }
 602
 603         if (tb[IFLA_BRPORT_PRIORITY]) {
 604                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 605                 if (err)
 606                         return err;
 607         }
 608
 609         if (tb[IFLA_BRPORT_STATE]) {
 610                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 611                 if (err)
 612                         return err;
 613         }
 614
 615         br_port_flags_change(p, old_flags ^ p->flags);
 616         return 0;
 617 }
 618
 619 /* Change state and parameters on port. */
 620 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 621 {
 622         struct nlattr *protinfo;
 623         struct nlattr *afspec;
 624         struct net_bridge_port *p;
 625         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 626         int err = 0;
 627
 628         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 629         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 630         if (!protinfo && !afspec)
 631                 return 0;
 632
 633         p = br_port_get_rtnl(dev);
 634         /* We want to accept dev as bridge itself if the AF_SPEC
 635          * is set to see if someone is setting vlan info on the bridge
 636          */
 637         if (!p && !afspec)
 638                 return -EINVAL;
 639
 640         if (p && protinfo) {
 641                 if (protinfo->nla_type & NLA_F_NESTED) {
 642                         err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
 643                                                protinfo, br_port_policy);
 644                         if (err)
 645                                 return err;
 646
 647                         spin_lock_bh(&p->br->lock);
 648                         err = br_setport(p, tb);
 649                         spin_unlock_bh(&p->br->lock);
 650                 } else {
 651                         /* Binary compatibility with old RSTP */
 652                         if (nla_len(protinfo) < sizeof(u8))
 653                                 return -EINVAL;
 654
 655                         spin_lock_bh(&p->br->lock);
 656                         err = br_set_port_state(p, nla_get_u8(protinfo));
 657                         spin_unlock_bh(&p->br->lock);
 658                 }
 659                 if (err)
 660                         goto out;
 661         }
 662
 663         if (afspec) {
 664                 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 665                                 afspec, RTM_SETLINK);
 666         }
 667
 668         if (err == 0)
 669                 br_ifinfo_notify(RTM_NEWLINK, p);
 670 out:
 671         return err;
 672 }
 673
 674 /* Delete port information */
 675 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 676 {
 677         struct nlattr *afspec;
 678         struct net_bridge_port *p;
 679         int err = 0;
 680
 681         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 682         if (!afspec)
 683                 return 0;
 684
 685         p = br_port_get_rtnl(dev);
 686         /* We want to accept dev as bridge itself as well */
 687         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
 688                 return -EINVAL;
 689
 690         err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
 691                         afspec, RTM_DELLINK);
 692         if (err == 0)
 693                 /* Send RTM_NEWLINK because userspace
 694                  * expects RTM_NEWLINK for vlan dels
 695                  */
 696                 br_ifinfo_notify(RTM_NEWLINK, p);
 697
 698         return err;
 699 }
 700 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
 701 {
 702         if (tb[IFLA_ADDRESS]) {
 703                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 704                         return -EINVAL;
 705                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 706                         return -EADDRNOTAVAIL;
 707         }
 708
 709         if (!data)
 710                 return 0;
 711
 712 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 713         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 714                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
 715                 case htons(ETH_P_8021Q):
 716                 case htons(ETH_P_8021AD):
 717                         break;
 718                 default:
 719                         return -EPROTONOSUPPORT;
 720                 }
 721         }
 722 #endif
 723
 724         return 0;
 725 }
 726
 727 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
 728                           struct nlattr *tb[], struct nlattr *data[])
 729 {
 730         struct net_bridge *br = netdev_priv(dev);
 731
 732         if (tb[IFLA_ADDRESS]) {
 733                 spin_lock_bh(&br->lock);
 734                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
 735                 spin_unlock_bh(&br->lock);
 736         }
 737
 738         return register_netdevice(dev);
 739 }
 740
 741 static int br_port_slave_changelink(struct net_device *brdev,
 742                                     struct net_device *dev,
 743                                     struct nlattr *tb[],
 744                                     struct nlattr *data[])
 745 {
 746         struct net_bridge *br = netdev_priv(brdev);
 747         int ret;
 748
 749         if (!data)
 750                 return 0;
 751
 752         spin_lock_bh(&br->lock);
 753         ret = br_setport(br_port_get_rtnl(dev), data);
 754         spin_unlock_bh(&br->lock);
 755
 756         return ret;
 757 }
 758
 759 static int br_port_fill_slave_info(struct sk_buff *skb,
 760                                    const struct net_device *brdev,
 761                                    const struct net_device *dev)
 762 {
 763         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
 764 }
 765
 766 static size_t br_port_get_slave_size(const struct net_device *brdev,
 767                                      const struct net_device *dev)
 768 {
 769         return br_port_info_size();
 770 }
 771
 772 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
 773         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
 774         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
 775         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
 776         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
 777         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
 778         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
 779         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
 780         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
 781         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
 782         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
 783                                  .len  = ETH_ALEN },
 784         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
 785         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
 786         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
 787         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
 788         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
 789         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
 790         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
 791         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
 792         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
 793         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
 794         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
 795         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
 796         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
 797         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
 798         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
 799         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
 800         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
 801         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
 802 };
 803
 804 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
 805                          struct nlattr *data[])
 806 {
 807         struct net_bridge *br = netdev_priv(brdev);
 808         int err;
 809
 810         if (!data)
 811                 return 0;
 812
 813         if (data[IFLA_BR_FORWARD_DELAY]) {
 814                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
 815                 if (err)
 816                         return err;
 817         }
 818
 819         if (data[IFLA_BR_HELLO_TIME]) {
 820                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
 821                 if (err)
 822                         return err;
 823         }
 824
 825         if (data[IFLA_BR_MAX_AGE]) {
 826                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
 827                 if (err)
 828                         return err;
 829         }
 830
 831         if (data[IFLA_BR_AGEING_TIME]) {
 832                 u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]);
 833
 834                 br->ageing_time = clock_t_to_jiffies(ageing_time);
 835         }
 836
 837         if (data[IFLA_BR_STP_STATE]) {
 838                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
 839
 840                 br_stp_set_enabled(br, stp_enabled);
 841         }
 842
 843         if (data[IFLA_BR_PRIORITY]) {
 844                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
 845
 846                 br_stp_set_bridge_priority(br, priority);
 847         }
 848
 849         if (data[IFLA_BR_VLAN_FILTERING]) {
 850                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
 851
 852                 err = __br_vlan_filter_toggle(br, vlan_filter);
 853                 if (err)
 854                         return err;
 855         }
 856
 857 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 858         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 859                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
 860
 861                 err = __br_vlan_set_proto(br, vlan_proto);
 862                 if (err)
 863                         return err;
 864         }
 865
 866         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 867                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 868
 869                 err = __br_vlan_set_default_pvid(br, defpvid);
 870                 if (err)
 871                         return err;
 872         }
 873 #endif
 874
 875         if (data[IFLA_BR_GROUP_FWD_MASK]) {
 876                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
 877
 878                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
 879                         return -EINVAL;
 880                 br->group_fwd_mask = fwd_mask;
 881         }
 882
 883         if (data[IFLA_BR_GROUP_ADDR]) {
 884                 u8 new_addr[ETH_ALEN];
 885
 886                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
 887                         return -EINVAL;
 888                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
 889                 if (!is_link_local_ether_addr(new_addr))
 890                         return -EINVAL;
 891                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
 892                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
 893                     new_addr[5] == 3)           /* 802.1X PAE address */
 894                         return -EINVAL;
 895                 spin_lock_bh(&br->lock);
 896                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
 897                 spin_unlock_bh(&br->lock);
 898                 br->group_addr_set = true;
 899                 br_recalculate_fwd_mask(br);
 900         }
 901
 902         if (data[IFLA_BR_FDB_FLUSH])
 903                 br_fdb_flush(br);
 904
 905 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 906         if (data[IFLA_BR_MCAST_ROUTER]) {
 907                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
 908
 909                 err = br_multicast_set_router(br, multicast_router);
 910                 if (err)
 911                         return err;
 912         }
 913
 914         if (data[IFLA_BR_MCAST_SNOOPING]) {
 915                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
 916
 917                 err = br_multicast_toggle(br, mcast_snooping);
 918                 if (err)
 919                         return err;
 920         }
 921
 922         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
 923                 u8 val;
 924
 925                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
 926                 br->multicast_query_use_ifaddr = !!val;
 927         }
 928
 929         if (data[IFLA_BR_MCAST_QUERIER]) {
 930                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
 931
 932                 err = br_multicast_set_querier(br, mcast_querier);
 933                 if (err)
 934                         return err;
 935         }
 936
 937         if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
 938                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
 939
 940                 br->hash_elasticity = val;
 941         }
 942
 943         if (data[IFLA_BR_MCAST_HASH_MAX]) {
 944                 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
 945
 946                 err = br_multicast_set_hash_max(br, hash_max);
 947                 if (err)
 948                         return err;
 949         }
 950
 951         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
 952                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
 953
 954                 br->multicast_last_member_count = val;
 955         }
 956
 957         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
 958                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
 959
 960                 br->multicast_startup_query_count = val;
 961         }
 962
 963         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
 964                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
 965
 966                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
 967         }
 968
 969         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
 970                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
 971
 972                 br->multicast_membership_interval = clock_t_to_jiffies(val);
 973         }
 974
 975         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
 976                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
 977
 978                 br->multicast_querier_interval = clock_t_to_jiffies(val);
 979         }
 980
 981         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
 982                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
 983
 984                 br->multicast_query_interval = clock_t_to_jiffies(val);
 985         }
 986
 987         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
 988                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
 989
 990                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
 991         }
 992
 993         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
 994                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
 995
 996                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
 997         }
 998 #endif
 999 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1000         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1001                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1002
1003                 br->nf_call_iptables = val ? true : false;
1004         }
1005
1006         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1007                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1008
1009                 br->nf_call_ip6tables = val ? true : false;
1010         }
1011
1012         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1013                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1014
1015                 br->nf_call_arptables = val ? true : false;
1016         }
1017 #endif
1018
1019         return 0;
1020 }
1021
1022 static size_t br_get_size(const struct net_device *brdev)
1023 {
1024         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1025                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1026                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1027                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1028                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1029                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1030                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1031 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1032                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1033                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1034 #endif
1035                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1036                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1037                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1038                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1039                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1040                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1041                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1042                nla_total_size(sizeof(u64)) +    /* IFLA_BR_HELLO_TIMER */
1043                nla_total_size(sizeof(u64)) +    /* IFLA_BR_TCN_TIMER */
1044                nla_total_size(sizeof(u64)) +    /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1045                nla_total_size(sizeof(u64)) +    /* IFLA_BR_GC_TIMER */
1046                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1047 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1048                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1049                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1050                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1051                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1052                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1053                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1054                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1055                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1056                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1057                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1058                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERIER_INTVL */
1059                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERY_INTVL */
1060                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1061                nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1062 #endif
1063 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1064                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1065                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1066                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1067 #endif
1068                0;
1069 }
1070
1071 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1072 {
1073         struct net_bridge *br = netdev_priv(brdev);
1074         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1075         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1076         u32 age_time = jiffies_to_clock_t(br->max_age);
1077         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1078         u32 stp_enabled = br->stp_enabled;
1079         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1080         u8 vlan_enabled = br_vlan_enabled(br);
1081         u64 clockval;
1082
1083         clockval = br_timer_value(&br->hello_timer);
1084         if (nla_put_u64(skb, IFLA_BR_HELLO_TIMER, clockval))
1085                 return -EMSGSIZE;
1086         clockval = br_timer_value(&br->tcn_timer);
1087         if (nla_put_u64(skb, IFLA_BR_TCN_TIMER, clockval))
1088                 return -EMSGSIZE;
1089         clockval = br_timer_value(&br->topology_change_timer);
1090         if (nla_put_u64(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval))
1091                 return -EMSGSIZE;
1092         clockval = br_timer_value(&br->gc_timer);
1093         if (nla_put_u64(skb, IFLA_BR_GC_TIMER, clockval))
1094                 return -EMSGSIZE;
1095
1096         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1097             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1098             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1099             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1100             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1101             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1102             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1103             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1104             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1105                     &br->bridge_id) ||
1106             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1107                     &br->designated_root) ||
1108             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1109             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1110             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1111             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1112                        br->topology_change_detected) ||
1113             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1114                 return -EMSGSIZE;
1115
1116 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1117         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1118             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid))
1119                 return -EMSGSIZE;
1120 #endif
1121 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1122         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1123             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1124             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1125                        br->multicast_query_use_ifaddr) ||
1126             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1127             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1128                         br->hash_elasticity) ||
1129             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1130             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1131                         br->multicast_last_member_count) ||
1132             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1133                         br->multicast_startup_query_count))
1134                 return -EMSGSIZE;
1135
1136         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1137         if (nla_put_u64(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval))
1138                 return -EMSGSIZE;
1139         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1140         if (nla_put_u64(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval))
1141                 return -EMSGSIZE;
1142         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1143         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval))
1144                 return -EMSGSIZE;
1145         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1146         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval))
1147                 return -EMSGSIZE;
1148         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1149         if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval))
1150                 return -EMSGSIZE;
1151         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1152         if (nla_put_u64(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval))
1153                 return -EMSGSIZE;
1154 #endif
1155 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1156         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1157                        br->nf_call_iptables ? 1 : 0) ||
1158             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1159                        br->nf_call_ip6tables ? 1 : 0) ||
1160             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1161                        br->nf_call_arptables ? 1 : 0))
1162                 return -EMSGSIZE;
1163 #endif
1164
1165         return 0;
1166 }
1167
1168 static size_t br_get_link_af_size(const struct net_device *dev)
1169 {
1170         struct net_bridge_port *p;
1171         struct net_bridge *br;
1172         int num_vlans = 0;
1173
1174         if (br_port_exists(dev)) {
1175                 p = br_port_get_rtnl(dev);
1176                 num_vlans = br_get_num_vlan_infos(nbp_vlan_group(p),
1177                                                   RTEXT_FILTER_BRVLAN);
1178         } else if (dev->priv_flags & IFF_EBRIDGE) {
1179                 br = netdev_priv(dev);
1180                 num_vlans = br_get_num_vlan_infos(br_vlan_group(br),
1181                                                   RTEXT_FILTER_BRVLAN);
1182         }
1183
1184         /* Each VLAN is returned in bridge_vlan_info along with flags */
1185         return num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
1186 }
1187
1188 static struct rtnl_af_ops br_af_ops __read_mostly = {
1189         .family                 = AF_BRIDGE,
1190         .get_link_af_size       = br_get_link_af_size,
1191 };
1192
1193 struct rtnl_link_ops br_link_ops __read_mostly = {
1194         .kind                   = "bridge",
1195         .priv_size              = sizeof(struct net_bridge),
1196         .setup                  = br_dev_setup,
1197         .maxtype                = IFLA_BR_MAX,
1198         .policy                 = br_policy,
1199         .validate               = br_validate,
1200         .newlink                = br_dev_newlink,
1201         .changelink             = br_changelink,
1202         .dellink                = br_dev_delete,
1203         .get_size               = br_get_size,
1204         .fill_info              = br_fill_info,
1205
1206         .slave_maxtype          = IFLA_BRPORT_MAX,
1207         .slave_policy           = br_port_policy,
1208         .slave_changelink       = br_port_slave_changelink,
1209         .get_slave_size         = br_port_get_slave_size,
1210         .fill_slave_info        = br_port_fill_slave_info,
1211 };
1212
1213 int __init br_netlink_init(void)
1214 {
1215         int err;
1216
1217         br_mdb_init();
1218         rtnl_af_register(&br_af_ops);
1219
1220         err = rtnl_link_register(&br_link_ops);
1221         if (err)
1222                 goto out_af;
1223
1224         return 0;
1225
1226 out_af:
1227         rtnl_af_unregister(&br_af_ops);
1228         br_mdb_uninit();
1229         return err;
1230 }
1231
1232 void br_netlink_fini(void)
1233 {
1234         br_mdb_uninit();
1235         rtnl_af_unregister(&br_af_ops);
1236         rtnl_link_unregister(&br_link_ops);
1237 }