net/bridge/br_netlink.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *      Bridge netlink control interface
   4  *
   5  *      Authors:
   6  *      Stephen Hemminger               <shemminger@osdl.org>
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/slab.h>
  11 #include <linux/etherdevice.h>
  12 #include <net/rtnetlink.h>
  13 #include <net/net_namespace.h>
  14 #include <net/sock.h>
  15 #include <uapi/linux/if_bridge.h>
  16
  17 #include "br_private.h"
  18 #include "br_private_stp.h"
  19 #include "br_private_tunnel.h"
  20
  21 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  22                                 u32 filter_mask)
  23 {
  24         struct net_bridge_vlan *v;
  25         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
  26         u16 flags, pvid;
  27         int num_vlans = 0;
  28
  29         if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
  30                 return 0;
  31
  32         pvid = br_get_pvid(vg);
  33         /* Count number of vlan infos */
  34         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
  35                 flags = 0;
  36                 /* only a context, bridge vlan not activated */
  37                 if (!br_vlan_should_use(v))
  38                         continue;
  39                 if (v->vid == pvid)
  40                         flags |= BRIDGE_VLAN_INFO_PVID;
  41
  42                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
  43                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
  44
  45                 if (vid_range_start == 0) {
  46                         goto initvars;
  47                 } else if ((v->vid - vid_range_end) == 1 &&
  48                         flags == vid_range_flags) {
  49                         vid_range_end = v->vid;
  50                         continue;
  51                 } else {
  52                         if ((vid_range_end - vid_range_start) > 0)
  53                                 num_vlans += 2;
  54                         else
  55                                 num_vlans += 1;
  56                 }
  57 initvars:
  58                 vid_range_start = v->vid;
  59                 vid_range_end = v->vid;
  60                 vid_range_flags = flags;
  61         }
  62
  63         if (vid_range_start != 0) {
  64                 if ((vid_range_end - vid_range_start) > 0)
  65                         num_vlans += 2;
  66                 else
  67                         num_vlans += 1;
  68         }
  69
  70         return num_vlans;
  71 }
  72
  73 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  74                                  u32 filter_mask)
  75 {
  76         int num_vlans;
  77
  78         if (!vg)
  79                 return 0;
  80
  81         if (filter_mask & RTEXT_FILTER_BRVLAN)
  82                 return vg->num_vlans;
  83
  84         rcu_read_lock();
  85         num_vlans = __get_num_vlan_infos(vg, filter_mask);
  86         rcu_read_unlock();
  87
  88         return num_vlans;
  89 }
  90
  91 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
  92                                            u32 filter_mask)
  93 {
  94         struct net_bridge_vlan_group *vg = NULL;
  95         struct net_bridge_port *p = NULL;
  96         struct net_bridge *br;
  97         int num_vlan_infos;
  98         size_t vinfo_sz = 0;
  99
 100         rcu_read_lock();
 101         if (netif_is_bridge_port(dev)) {
 102                 p = br_port_get_rcu(dev);
 103                 vg = nbp_vlan_group_rcu(p);
 104         } else if (dev->priv_flags & IFF_EBRIDGE) {
 105                 br = netdev_priv(dev);
 106                 vg = br_vlan_group_rcu(br);
 107         }
 108         num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
 109         rcu_read_unlock();
 110
 111         if (p && (p->flags & BR_VLAN_TUNNEL))
 112                 vinfo_sz += br_get_vlan_tunnel_info_size(vg);
 113
 114         /* Each VLAN is returned in bridge_vlan_info along with flags */
 115         vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
 116
 117         return vinfo_sz;
 118 }
 119
 120 static inline size_t br_port_info_size(void)
 121 {
 122         return nla_total_size(1)        /* IFLA_BRPORT_STATE  */
 123                 + nla_total_size(2)     /* IFLA_BRPORT_PRIORITY */
 124                 + nla_total_size(4)     /* IFLA_BRPORT_COST */
 125                 + nla_total_size(1)     /* IFLA_BRPORT_MODE */
 126                 + nla_total_size(1)     /* IFLA_BRPORT_GUARD */
 127                 + nla_total_size(1)     /* IFLA_BRPORT_PROTECT */
 128                 + nla_total_size(1)     /* IFLA_BRPORT_FAST_LEAVE */
 129                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_TO_UCAST */
 130                 + nla_total_size(1)     /* IFLA_BRPORT_LEARNING */
 131                 + nla_total_size(1)     /* IFLA_BRPORT_UNICAST_FLOOD */
 132                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_FLOOD */
 133                 + nla_total_size(1)     /* IFLA_BRPORT_BCAST_FLOOD */
 134                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP */
 135                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP_WIFI */
 136                 + nla_total_size(1)     /* IFLA_BRPORT_VLAN_TUNNEL */
 137                 + nla_total_size(1)     /* IFLA_BRPORT_NEIGH_SUPPRESS */
 138                 + nla_total_size(1)     /* IFLA_BRPORT_ISOLATED */
 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                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_GROUP_FWD_MASK */
 154                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MRP_RING_OPEN */
 155                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MRP_IN_OPEN */
 156                 + 0;
 157 }
 158
 159 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
 160 {
 161         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
 162                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
 163                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
 164                 + nla_total_size(4) /* IFLA_MASTER */
 165                 + nla_total_size(4) /* IFLA_MTU */
 166                 + nla_total_size(4) /* IFLA_LINK */
 167                 + nla_total_size(1) /* IFLA_OPERSTATE */
 168                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
 169                 + nla_total_size(br_get_link_af_size_filtered(dev,
 170                                  filter_mask)) /* IFLA_AF_SPEC */
 171                 + nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */
 172 }
 173
 174 static int br_port_fill_attrs(struct sk_buff *skb,
 175                               const struct net_bridge_port *p)
 176 {
 177         u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
 178         struct net_bridge_port *backup_p;
 179         u64 timerval;
 180
 181         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
 182             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
 183             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
 184             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
 185             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
 186             nla_put_u8(skb, IFLA_BRPORT_PROTECT,
 187                        !!(p->flags & BR_ROOT_BLOCK)) ||
 188             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
 189                        !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
 190             nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
 191                        !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
 192             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
 193             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
 194                        !!(p->flags & BR_FLOOD)) ||
 195             nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
 196                        !!(p->flags & BR_MCAST_FLOOD)) ||
 197             nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
 198                        !!(p->flags & BR_BCAST_FLOOD)) ||
 199             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
 200             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
 201                        !!(p->flags & BR_PROXYARP_WIFI)) ||
 202             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
 203                     &p->designated_root) ||
 204             nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
 205                     &p->designated_bridge) ||
 206             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
 207             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
 208             nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
 209             nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
 210             nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
 211                        p->topology_change_ack) ||
 212             nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
 213             nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
 214                                                         BR_VLAN_TUNNEL)) ||
 215             nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
 216             nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
 217                        !!(p->flags & BR_NEIGH_SUPPRESS)) ||
 218             nla_put_u8(skb, IFLA_BRPORT_MRP_RING_OPEN, !!(p->flags &
 219                                                           BR_MRP_LOST_CONT)) ||
 220             nla_put_u8(skb, IFLA_BRPORT_MRP_IN_OPEN,
 221                        !!(p->flags & BR_MRP_LOST_IN_CONT)) ||
 222             nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)))
 223                 return -EMSGSIZE;
 224
 225         timerval = br_timer_value(&p->message_age_timer);
 226         if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
 227                               IFLA_BRPORT_PAD))
 228                 return -EMSGSIZE;
 229         timerval = br_timer_value(&p->forward_delay_timer);
 230         if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
 231                               IFLA_BRPORT_PAD))
 232                 return -EMSGSIZE;
 233         timerval = br_timer_value(&p->hold_timer);
 234         if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
 235                               IFLA_BRPORT_PAD))
 236                 return -EMSGSIZE;
 237
 238 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 239         if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
 240                        p->multicast_router))
 241                 return -EMSGSIZE;
 242 #endif
 243
 244         /* we might be called only with br->lock */
 245         rcu_read_lock();
 246         backup_p = rcu_dereference(p->backup_port);
 247         if (backup_p)
 248                 nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT,
 249                             backup_p->dev->ifindex);
 250         rcu_read_unlock();
 251
 252         return 0;
 253 }
 254
 255 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
 256                                     u16 vid_end, u16 flags)
 257 {
 258         struct  bridge_vlan_info vinfo;
 259
 260         if ((vid_end - vid_start) > 0) {
 261                 /* add range to skb */
 262                 vinfo.vid = vid_start;
 263                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
 264                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 265                             sizeof(vinfo), &vinfo))
 266                         goto nla_put_failure;
 267
 268                 vinfo.vid = vid_end;
 269                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
 270                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 271                             sizeof(vinfo), &vinfo))
 272                         goto nla_put_failure;
 273         } else {
 274                 vinfo.vid = vid_start;
 275                 vinfo.flags = flags;
 276                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 277                             sizeof(vinfo), &vinfo))
 278                         goto nla_put_failure;
 279         }
 280
 281         return 0;
 282
 283 nla_put_failure:
 284         return -EMSGSIZE;
 285 }
 286
 287 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
 288                                          struct net_bridge_vlan_group *vg)
 289 {
 290         struct net_bridge_vlan *v;
 291         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 292         u16 flags, pvid;
 293         int err = 0;
 294
 295         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
 296          * and mark vlan info with begin and end flags
 297          * if vlaninfo represents a range
 298          */
 299         pvid = br_get_pvid(vg);
 300         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 301                 flags = 0;
 302                 if (!br_vlan_should_use(v))
 303                         continue;
 304                 if (v->vid == pvid)
 305                         flags |= BRIDGE_VLAN_INFO_PVID;
 306
 307                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 308                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 309
 310                 if (vid_range_start == 0) {
 311                         goto initvars;
 312                 } else if ((v->vid - vid_range_end) == 1 &&
 313                         flags == vid_range_flags) {
 314                         vid_range_end = v->vid;
 315                         continue;
 316                 } else {
 317                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 318                                                        vid_range_end,
 319                                                        vid_range_flags);
 320                         if (err)
 321                                 return err;
 322                 }
 323
 324 initvars:
 325                 vid_range_start = v->vid;
 326                 vid_range_end = v->vid;
 327                 vid_range_flags = flags;
 328         }
 329
 330         if (vid_range_start != 0) {
 331                 /* Call it once more to send any left over vlans */
 332                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 333                                                vid_range_end,
 334                                                vid_range_flags);
 335                 if (err)
 336                         return err;
 337         }
 338
 339         return 0;
 340 }
 341
 342 static int br_fill_ifvlaninfo(struct sk_buff *skb,
 343                               struct net_bridge_vlan_group *vg)
 344 {
 345         struct bridge_vlan_info vinfo;
 346         struct net_bridge_vlan *v;
 347         u16 pvid;
 348
 349         pvid = br_get_pvid(vg);
 350         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 351                 if (!br_vlan_should_use(v))
 352                         continue;
 353
 354                 vinfo.vid = v->vid;
 355                 vinfo.flags = 0;
 356                 if (v->vid == pvid)
 357                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
 358
 359                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 360                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 361
 362                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 363                             sizeof(vinfo), &vinfo))
 364                         goto nla_put_failure;
 365         }
 366
 367         return 0;
 368
 369 nla_put_failure:
 370         return -EMSGSIZE;
 371 }
 372
 373 /*
 374  * Create one netlink message for one interface
 375  * Contains port and master info as well as carrier and bridge state.
 376  */
 377 static int br_fill_ifinfo(struct sk_buff *skb,
 378                           const struct net_bridge_port *port,
 379                           u32 pid, u32 seq, int event, unsigned int flags,
 380                           u32 filter_mask, const struct net_device *dev)
 381 {
 382         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
 383         struct nlattr *af = NULL;
 384         struct net_bridge *br;
 385         struct ifinfomsg *hdr;
 386         struct nlmsghdr *nlh;
 387
 388         if (port)
 389                 br = port->br;
 390         else
 391                 br = netdev_priv(dev);
 392
 393         br_debug(br, "br_fill_info event %d port %s master %s\n",
 394                      event, dev->name, br->dev->name);
 395
 396         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
 397         if (nlh == NULL)
 398                 return -EMSGSIZE;
 399
 400         hdr = nlmsg_data(nlh);
 401         hdr->ifi_family = AF_BRIDGE;
 402         hdr->__ifi_pad = 0;
 403         hdr->ifi_type = dev->type;
 404         hdr->ifi_index = dev->ifindex;
 405         hdr->ifi_flags = dev_get_flags(dev);
 406         hdr->ifi_change = 0;
 407
 408         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
 409             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
 410             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
 411             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
 412             (dev->addr_len &&
 413              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
 414             (dev->ifindex != dev_get_iflink(dev) &&
 415              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
 416                 goto nla_put_failure;
 417
 418         if (event == RTM_NEWLINK && port) {
 419                 struct nlattr *nest;
 420
 421                 nest = nla_nest_start(skb, IFLA_PROTINFO);
 422                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 423                         goto nla_put_failure;
 424                 nla_nest_end(skb, nest);
 425         }
 426
 427         if (filter_mask & (RTEXT_FILTER_BRVLAN |
 428                            RTEXT_FILTER_BRVLAN_COMPRESSED |
 429                            RTEXT_FILTER_MRP)) {
 430                 af = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
 431                 if (!af)
 432                         goto nla_put_failure;
 433         }
 434
 435         /* Check if  the VID information is requested */
 436         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
 437             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
 438                 struct net_bridge_vlan_group *vg;
 439                 int err;
 440
 441                 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
 442                 rcu_read_lock();
 443                 if (port)
 444                         vg = nbp_vlan_group_rcu(port);
 445                 else
 446                         vg = br_vlan_group_rcu(br);
 447
 448                 if (!vg || !vg->num_vlans) {
 449                         rcu_read_unlock();
 450                         goto done;
 451                 }
 452                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 453                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 454                 else
 455                         err = br_fill_ifvlaninfo(skb, vg);
 456
 457                 if (port && (port->flags & BR_VLAN_TUNNEL))
 458                         err = br_fill_vlan_tunnel_info(skb, vg);
 459                 rcu_read_unlock();
 460                 if (err)
 461                         goto nla_put_failure;
 462         }
 463
 464         if (filter_mask & RTEXT_FILTER_MRP) {
 465                 int err;
 466
 467                 if (!br_mrp_enabled(br) || port)
 468                         goto done;
 469
 470                 rcu_read_lock();
 471                 err = br_mrp_fill_info(skb, br);
 472                 rcu_read_unlock();
 473
 474                 if (err)
 475                         goto nla_put_failure;
 476         }
 477
 478 done:
 479         if (af)
 480                 nla_nest_end(skb, af);
 481         nlmsg_end(skb, nlh);
 482         return 0;
 483
 484 nla_put_failure:
 485         nlmsg_cancel(skb, nlh);
 486         return -EMSGSIZE;
 487 }
 488
 489 /* Notify listeners of a change in bridge or port information */
 490 void br_ifinfo_notify(int event, const struct net_bridge *br,
 491                       const struct net_bridge_port *port)
 492 {
 493         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 494         struct net_device *dev;
 495         struct sk_buff *skb;
 496         int err = -ENOBUFS;
 497         struct net *net;
 498         u16 port_no = 0;
 499
 500         if (WARN_ON(!port && !br))
 501                 return;
 502
 503         if (port) {
 504                 dev = port->dev;
 505                 br = port->br;
 506                 port_no = port->port_no;
 507         } else {
 508                 dev = br->dev;
 509         }
 510
 511         net = dev_net(dev);
 512         br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
 513
 514         skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
 515         if (skb == NULL)
 516                 goto errout;
 517
 518         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev);
 519         if (err < 0) {
 520                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 521                 WARN_ON(err == -EMSGSIZE);
 522                 kfree_skb(skb);
 523                 goto errout;
 524         }
 525         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 526         return;
 527 errout:
 528         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 529 }
 530
 531 /*
 532  * Dump information about all ports, in response to GETLINK
 533  */
 534 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 535                struct net_device *dev, u32 filter_mask, int nlflags)
 536 {
 537         struct net_bridge_port *port = br_port_get_rtnl(dev);
 538
 539         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 540             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) &&
 541             !(filter_mask & RTEXT_FILTER_MRP))
 542                 return 0;
 543
 544         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 545                               filter_mask, dev);
 546 }
 547
 548 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 549                         int cmd, struct bridge_vlan_info *vinfo, bool *changed,
 550                         struct netlink_ext_ack *extack)
 551 {
 552         bool curr_change;
 553         int err = 0;
 554
 555         switch (cmd) {
 556         case RTM_SETLINK:
 557                 if (p) {
 558                         /* if the MASTER flag is set this will act on the global
 559                          * per-VLAN entry as well
 560                          */
 561                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
 562                                            &curr_change, extack);
 563                 } else {
 564                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 565                         err = br_vlan_add(br, vinfo->vid, vinfo->flags,
 566                                           &curr_change, extack);
 567                 }
 568                 if (curr_change)
 569                         *changed = true;
 570                 break;
 571
 572         case RTM_DELLINK:
 573                 if (p) {
 574                         if (!nbp_vlan_delete(p, vinfo->vid))
 575                                 *changed = true;
 576
 577                         if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
 578                             !br_vlan_delete(p->br, vinfo->vid))
 579                                 *changed = true;
 580                 } else if (!br_vlan_delete(br, vinfo->vid)) {
 581                         *changed = true;
 582                 }
 583                 break;
 584         }
 585
 586         return err;
 587 }
 588
 589 int br_process_vlan_info(struct net_bridge *br,
 590                          struct net_bridge_port *p, int cmd,
 591                          struct bridge_vlan_info *vinfo_curr,
 592                          struct bridge_vlan_info **vinfo_last,
 593                          bool *changed,
 594                          struct netlink_ext_ack *extack)
 595 {
 596         int err, rtm_cmd;
 597
 598         if (!br_vlan_valid_id(vinfo_curr->vid, extack))
 599                 return -EINVAL;
 600
 601         /* needed for vlan-only NEWVLAN/DELVLAN notifications */
 602         rtm_cmd = br_afspec_cmd_to_rtm(cmd);
 603
 604         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 605                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 606                         return -EINVAL;
 607                 *vinfo_last = vinfo_curr;
 608                 return 0;
 609         }
 610
 611         if (*vinfo_last) {
 612                 struct bridge_vlan_info tmp_vinfo;
 613                 int v, v_change_start = 0;
 614
 615                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 616                         return -EINVAL;
 617
 618                 memcpy(&tmp_vinfo, *vinfo_last,
 619                        sizeof(struct bridge_vlan_info));
 620                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
 621                         bool curr_change = false;
 622
 623                         tmp_vinfo.vid = v;
 624                         err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change,
 625                                            extack);
 626                         if (err)
 627                                 break;
 628                         if (curr_change) {
 629                                 *changed = curr_change;
 630                                 if (!v_change_start)
 631                                         v_change_start = v;
 632                         } else {
 633                                 /* nothing to notify yet */
 634                                 if (!v_change_start)
 635                                         continue;
 636                                 br_vlan_notify(br, p, v_change_start,
 637                                                v - 1, rtm_cmd);
 638                                 v_change_start = 0;
 639                         }
 640                         cond_resched();
 641                 }
 642                 /* v_change_start is set only if the last/whole range changed */
 643                 if (v_change_start)
 644                         br_vlan_notify(br, p, v_change_start,
 645                                        v - 1, rtm_cmd);
 646
 647                 *vinfo_last = NULL;
 648
 649                 return err;
 650         }
 651
 652         err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
 653         if (*changed)
 654                 br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd);
 655
 656         return err;
 657 }
 658
 659 static int br_afspec(struct net_bridge *br,
 660                      struct net_bridge_port *p,
 661                      struct nlattr *af_spec,
 662                      int cmd, bool *changed,
 663                      struct netlink_ext_ack *extack)
 664 {
 665         struct bridge_vlan_info *vinfo_curr = NULL;
 666         struct bridge_vlan_info *vinfo_last = NULL;
 667         struct nlattr *attr;
 668         struct vtunnel_info tinfo_last = {};
 669         struct vtunnel_info tinfo_curr = {};
 670         int err = 0, rem;
 671
 672         nla_for_each_nested(attr, af_spec, rem) {
 673                 err = 0;
 674                 switch (nla_type(attr)) {
 675                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
 676                         if (!p || !(p->flags & BR_VLAN_TUNNEL))
 677                                 return -EINVAL;
 678                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
 679                         if (err)
 680                                 return err;
 681                         err = br_process_vlan_tunnel_info(br, p, cmd,
 682                                                           &tinfo_curr,
 683                                                           &tinfo_last,
 684                                                           changed);
 685                         if (err)
 686                                 return err;
 687                         break;
 688                 case IFLA_BRIDGE_VLAN_INFO:
 689                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 690                                 return -EINVAL;
 691                         vinfo_curr = nla_data(attr);
 692                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
 693                                                    &vinfo_last, changed,
 694                                                    extack);
 695                         if (err)
 696                                 return err;
 697                         break;
 698                 case IFLA_BRIDGE_MRP:
 699                         err = br_mrp_parse(br, p, attr, cmd, extack);
 700                         if (err)
 701                                 return err;
 702                         break;
 703                 }
 704         }
 705
 706         return err;
 707 }
 708
 709 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 710         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 711         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 712         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 713         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 714         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 715         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 716         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 717         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 718         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 719         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 720         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 721         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 722         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
 723         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
 724         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
 725         [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
 726         [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
 727         [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
 728         [IFLA_BRPORT_ISOLATED]  = { .type = NLA_U8 },
 729         [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
 730 };
 731
 732 /* Change the state of the port and notify spanning tree */
 733 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 734 {
 735         if (state > BR_STATE_BLOCKING)
 736                 return -EINVAL;
 737
 738         /* if kernel STP is running, don't allow changes */
 739         if (p->br->stp_enabled == BR_KERNEL_STP)
 740                 return -EBUSY;
 741
 742         /* if device is not up, change is not allowed
 743          * if link is not present, only allowable state is disabled
 744          */
 745         if (!netif_running(p->dev) ||
 746             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 747                 return -ENETDOWN;
 748
 749         br_set_state(p, state);
 750         br_port_state_selection(p->br);
 751         return 0;
 752 }
 753
 754 /* Set/clear or port flags based on attribute */
 755 static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 756                             int attrtype, unsigned long mask)
 757 {
 758         unsigned long flags;
 759         int err;
 760
 761         if (!tb[attrtype])
 762                 return 0;
 763
 764         if (nla_get_u8(tb[attrtype]))
 765                 flags = p->flags | mask;
 766         else
 767                 flags = p->flags & ~mask;
 768
 769         err = br_switchdev_set_port_flag(p, flags, mask);
 770         if (err)
 771                 return err;
 772
 773         p->flags = flags;
 774         return 0;
 775 }
 776
 777 /* Process bridge protocol info on port */
 778 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 779 {
 780         unsigned long old_flags = p->flags;
 781         bool br_vlan_tunnel_old = false;
 782         int err;
 783
 784         err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 785         if (err)
 786                 return err;
 787
 788         err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 789         if (err)
 790                 return err;
 791
 792         err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 793         if (err)
 794                 return err;
 795
 796         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 797         if (err)
 798                 return err;
 799
 800         err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 801         if (err)
 802                 return err;
 803
 804         err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 805         if (err)
 806                 return err;
 807
 808         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
 809         if (err)
 810                 return err;
 811
 812         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
 813         if (err)
 814                 return err;
 815
 816         err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
 817         if (err)
 818                 return err;
 819
 820         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 821         if (err)
 822                 return err;
 823
 824         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 825         if (err)
 826                 return err;
 827
 828         br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
 829         err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
 830         if (err)
 831                 return err;
 832
 833         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
 834                 nbp_vlan_tunnel_info_flush(p);
 835
 836         if (tb[IFLA_BRPORT_COST]) {
 837                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 838                 if (err)
 839                         return err;
 840         }
 841
 842         if (tb[IFLA_BRPORT_PRIORITY]) {
 843                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 844                 if (err)
 845                         return err;
 846         }
 847
 848         if (tb[IFLA_BRPORT_STATE]) {
 849                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 850                 if (err)
 851                         return err;
 852         }
 853
 854         if (tb[IFLA_BRPORT_FLUSH])
 855                 br_fdb_delete_by_port(p->br, p, 0, 0);
 856
 857 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 858         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 859                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 860
 861                 err = br_multicast_set_port_router(p, mcast_router);
 862                 if (err)
 863                         return err;
 864         }
 865 #endif
 866
 867         if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
 868                 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
 869
 870                 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
 871                         return -EINVAL;
 872                 p->group_fwd_mask = fwd_mask;
 873         }
 874
 875         err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
 876                                BR_NEIGH_SUPPRESS);
 877         if (err)
 878                 return err;
 879
 880         err = br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
 881         if (err)
 882                 return err;
 883
 884         if (tb[IFLA_BRPORT_BACKUP_PORT]) {
 885                 struct net_device *backup_dev = NULL;
 886                 u32 backup_ifindex;
 887
 888                 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
 889                 if (backup_ifindex) {
 890                         backup_dev = __dev_get_by_index(dev_net(p->dev),
 891                                                         backup_ifindex);
 892                         if (!backup_dev)
 893                                 return -ENOENT;
 894                 }
 895
 896                 err = nbp_backup_change(p, backup_dev);
 897                 if (err)
 898                         return err;
 899         }
 900
 901         br_port_flags_change(p, old_flags ^ p->flags);
 902         return 0;
 903 }
 904
 905 /* Change state and parameters on port. */
 906 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags,
 907                struct netlink_ext_ack *extack)
 908 {
 909         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
 910         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 911         struct net_bridge_port *p;
 912         struct nlattr *protinfo;
 913         struct nlattr *afspec;
 914         bool changed = false;
 915         int err = 0;
 916
 917         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 918         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 919         if (!protinfo && !afspec)
 920                 return 0;
 921
 922         p = br_port_get_rtnl(dev);
 923         /* We want to accept dev as bridge itself if the AF_SPEC
 924          * is set to see if someone is setting vlan info on the bridge
 925          */
 926         if (!p && !afspec)
 927                 return -EINVAL;
 928
 929         if (p && protinfo) {
 930                 if (protinfo->nla_type & NLA_F_NESTED) {
 931                         err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX,
 932                                                           protinfo,
 933                                                           br_port_policy,
 934                                                           NULL);
 935                         if (err)
 936                                 return err;
 937
 938                         spin_lock_bh(&p->br->lock);
 939                         err = br_setport(p, tb);
 940                         spin_unlock_bh(&p->br->lock);
 941                 } else {
 942                         /* Binary compatibility with old RSTP */
 943                         if (nla_len(protinfo) < sizeof(u8))
 944                                 return -EINVAL;
 945
 946                         spin_lock_bh(&p->br->lock);
 947                         err = br_set_port_state(p, nla_get_u8(protinfo));
 948                         spin_unlock_bh(&p->br->lock);
 949                 }
 950                 if (err)
 951                         goto out;
 952                 changed = true;
 953         }
 954
 955         if (afspec)
 956                 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
 957
 958         if (changed)
 959                 br_ifinfo_notify(RTM_NEWLINK, br, p);
 960 out:
 961         return err;
 962 }
 963
 964 /* Delete port information */
 965 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 966 {
 967         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
 968         struct net_bridge_port *p;
 969         struct nlattr *afspec;
 970         bool changed = false;
 971         int err = 0;
 972
 973         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 974         if (!afspec)
 975                 return 0;
 976
 977         p = br_port_get_rtnl(dev);
 978         /* We want to accept dev as bridge itself as well */
 979         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
 980                 return -EINVAL;
 981
 982         err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL);
 983         if (changed)
 984                 /* Send RTM_NEWLINK because userspace
 985                  * expects RTM_NEWLINK for vlan dels
 986                  */
 987                 br_ifinfo_notify(RTM_NEWLINK, br, p);
 988
 989         return err;
 990 }
 991
 992 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
 993                        struct netlink_ext_ack *extack)
 994 {
 995         if (tb[IFLA_ADDRESS]) {
 996                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 997                         return -EINVAL;
 998                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 999                         return -EADDRNOTAVAIL;
1000         }
1001
1002         if (!data)
1003                 return 0;
1004
1005 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1006         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1007                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
1008                 case htons(ETH_P_8021Q):
1009                 case htons(ETH_P_8021AD):
1010                         break;
1011                 default:
1012                         return -EPROTONOSUPPORT;
1013                 }
1014         }
1015
1016         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1017                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1018
1019                 if (defpvid >= VLAN_VID_MASK)
1020                         return -EINVAL;
1021         }
1022 #endif
1023
1024         return 0;
1025 }
1026
1027 static int br_port_slave_changelink(struct net_device *brdev,
1028                                     struct net_device *dev,
1029                                     struct nlattr *tb[],
1030                                     struct nlattr *data[],
1031                                     struct netlink_ext_ack *extack)
1032 {
1033         struct net_bridge *br = netdev_priv(brdev);
1034         int ret;
1035
1036         if (!data)
1037                 return 0;
1038
1039         spin_lock_bh(&br->lock);
1040         ret = br_setport(br_port_get_rtnl(dev), data);
1041         spin_unlock_bh(&br->lock);
1042
1043         return ret;
1044 }
1045
1046 static int br_port_fill_slave_info(struct sk_buff *skb,
1047                                    const struct net_device *brdev,
1048                                    const struct net_device *dev)
1049 {
1050         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
1051 }
1052
1053 static size_t br_port_get_slave_size(const struct net_device *brdev,
1054                                      const struct net_device *dev)
1055 {
1056         return br_port_info_size();
1057 }
1058
1059 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1060         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1061         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
1062         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
1063         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1064         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1065         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1066         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1067         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1068         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1069         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1070                                  .len  = ETH_ALEN },
1071         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1072         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1073         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1074         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1075         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1076         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1077         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1078         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1079         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1080         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1081         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1082         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1083         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1084         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1085         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1086         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1087         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1088         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1089         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1090         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1091         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1092         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1093         [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1094         [IFLA_BR_MULTI_BOOLOPT] =
1095                 NLA_POLICY_EXACT_LEN(sizeof(struct br_boolopt_multi)),
1096 };
1097
1098 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1099                          struct nlattr *data[],
1100                          struct netlink_ext_ack *extack)
1101 {
1102         struct net_bridge *br = netdev_priv(brdev);
1103         int err;
1104
1105         if (!data)
1106                 return 0;
1107
1108         if (data[IFLA_BR_FORWARD_DELAY]) {
1109                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1110                 if (err)
1111                         return err;
1112         }
1113
1114         if (data[IFLA_BR_HELLO_TIME]) {
1115                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1116                 if (err)
1117                         return err;
1118         }
1119
1120         if (data[IFLA_BR_MAX_AGE]) {
1121                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1122                 if (err)
1123                         return err;
1124         }
1125
1126         if (data[IFLA_BR_AGEING_TIME]) {
1127                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1128                 if (err)
1129                         return err;
1130         }
1131
1132         if (data[IFLA_BR_STP_STATE]) {
1133                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1134
1135                 err = br_stp_set_enabled(br, stp_enabled, extack);
1136                 if (err)
1137                         return err;
1138         }
1139
1140         if (data[IFLA_BR_PRIORITY]) {
1141                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1142
1143                 br_stp_set_bridge_priority(br, priority);
1144         }
1145
1146         if (data[IFLA_BR_VLAN_FILTERING]) {
1147                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1148
1149                 err = __br_vlan_filter_toggle(br, vlan_filter);
1150                 if (err)
1151                         return err;
1152         }
1153
1154 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1155         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1156                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1157
1158                 err = __br_vlan_set_proto(br, vlan_proto);
1159                 if (err)
1160                         return err;
1161         }
1162
1163         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1164                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1165
1166                 err = __br_vlan_set_default_pvid(br, defpvid, extack);
1167                 if (err)
1168                         return err;
1169         }
1170
1171         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1172                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1173
1174                 err = br_vlan_set_stats(br, vlan_stats);
1175                 if (err)
1176                         return err;
1177         }
1178
1179         if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1180                 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1181
1182                 err = br_vlan_set_stats_per_port(br, per_port);
1183                 if (err)
1184                         return err;
1185         }
1186 #endif
1187
1188         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1189                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1190
1191                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1192                         return -EINVAL;
1193                 br->group_fwd_mask = fwd_mask;
1194         }
1195
1196         if (data[IFLA_BR_GROUP_ADDR]) {
1197                 u8 new_addr[ETH_ALEN];
1198
1199                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1200                         return -EINVAL;
1201                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1202                 if (!is_link_local_ether_addr(new_addr))
1203                         return -EINVAL;
1204                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1205                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1206                     new_addr[5] == 3)           /* 802.1X PAE address */
1207                         return -EINVAL;
1208                 spin_lock_bh(&br->lock);
1209                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1210                 spin_unlock_bh(&br->lock);
1211                 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1212                 br_recalculate_fwd_mask(br);
1213         }
1214
1215         if (data[IFLA_BR_FDB_FLUSH])
1216                 br_fdb_flush(br);
1217
1218 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1219         if (data[IFLA_BR_MCAST_ROUTER]) {
1220                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1221
1222                 err = br_multicast_set_router(br, multicast_router);
1223                 if (err)
1224                         return err;
1225         }
1226
1227         if (data[IFLA_BR_MCAST_SNOOPING]) {
1228                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1229
1230                 br_multicast_toggle(br, mcast_snooping);
1231         }
1232
1233         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1234                 u8 val;
1235
1236                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1237                 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1238         }
1239
1240         if (data[IFLA_BR_MCAST_QUERIER]) {
1241                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1242
1243                 err = br_multicast_set_querier(br, mcast_querier);
1244                 if (err)
1245                         return err;
1246         }
1247
1248         if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
1249                 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
1250                         RHT_ELASTICITY);
1251
1252         if (data[IFLA_BR_MCAST_HASH_MAX])
1253                 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1254
1255         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1256                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1257
1258                 br->multicast_last_member_count = val;
1259         }
1260
1261         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1262                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1263
1264                 br->multicast_startup_query_count = val;
1265         }
1266
1267         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1268                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1269
1270                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1271         }
1272
1273         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1274                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1275
1276                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1277         }
1278
1279         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1280                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1281
1282                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1283         }
1284
1285         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1286                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1287
1288                 br->multicast_query_interval = clock_t_to_jiffies(val);
1289         }
1290
1291         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1292                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1293
1294                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1295         }
1296
1297         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1298                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1299
1300                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1301         }
1302
1303         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1304                 __u8 mcast_stats;
1305
1306                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1307                 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1308         }
1309
1310         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1311                 __u8 igmp_version;
1312
1313                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1314                 err = br_multicast_set_igmp_version(br, igmp_version);
1315                 if (err)
1316                         return err;
1317         }
1318
1319 #if IS_ENABLED(CONFIG_IPV6)
1320         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1321                 __u8 mld_version;
1322
1323                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1324                 err = br_multicast_set_mld_version(br, mld_version);
1325                 if (err)
1326                         return err;
1327         }
1328 #endif
1329 #endif
1330 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1331         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1332                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1333
1334                 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1335         }
1336
1337         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1338                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1339
1340                 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1341         }
1342
1343         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1344                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1345
1346                 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1347         }
1348 #endif
1349
1350         if (data[IFLA_BR_MULTI_BOOLOPT]) {
1351                 struct br_boolopt_multi *bm;
1352
1353                 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
1354                 err = br_boolopt_multi_toggle(br, bm, extack);
1355                 if (err)
1356                         return err;
1357         }
1358
1359         return 0;
1360 }
1361
1362 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1363                           struct nlattr *tb[], struct nlattr *data[],
1364                           struct netlink_ext_ack *extack)
1365 {
1366         struct net_bridge *br = netdev_priv(dev);
1367         int err;
1368
1369         err = register_netdevice(dev);
1370         if (err)
1371                 return err;
1372
1373         if (tb[IFLA_ADDRESS]) {
1374                 spin_lock_bh(&br->lock);
1375                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1376                 spin_unlock_bh(&br->lock);
1377         }
1378
1379         err = br_changelink(dev, tb, data, extack);
1380         if (err)
1381                 br_dev_delete(dev, NULL);
1382
1383         return err;
1384 }
1385
1386 static size_t br_get_size(const struct net_device *brdev)
1387 {
1388         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1389                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1390                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1391                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1392                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1393                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1394                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1395 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1396                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1397                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1398                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1399                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_PER_PORT */
1400 #endif
1401                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1402                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1403                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1404                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1405                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1406                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1407                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1408                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1409                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1410                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1411                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1412                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1413 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1414                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1415                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1416                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1417                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1418                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1419                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1420                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1421                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1422                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1423                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1424                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1425                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1426                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1427                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1428                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1429                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1430                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1431 #endif
1432 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1433                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1434                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1435                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1436 #endif
1437                nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
1438                0;
1439 }
1440
1441 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1442 {
1443         struct net_bridge *br = netdev_priv(brdev);
1444         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1445         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1446         u32 age_time = jiffies_to_clock_t(br->max_age);
1447         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1448         u32 stp_enabled = br->stp_enabled;
1449         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1450         u8 vlan_enabled = br_vlan_enabled(br->dev);
1451         struct br_boolopt_multi bm;
1452         u64 clockval;
1453
1454         clockval = br_timer_value(&br->hello_timer);
1455         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1456                 return -EMSGSIZE;
1457         clockval = br_timer_value(&br->tcn_timer);
1458         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1459                 return -EMSGSIZE;
1460         clockval = br_timer_value(&br->topology_change_timer);
1461         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1462                               IFLA_BR_PAD))
1463                 return -EMSGSIZE;
1464         clockval = br_timer_value(&br->gc_work.timer);
1465         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1466                 return -EMSGSIZE;
1467
1468         br_boolopt_multi_get(br, &bm);
1469         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1470             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1471             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1472             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1473             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1474             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1475             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1476             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1477             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1478                     &br->bridge_id) ||
1479             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1480                     &br->designated_root) ||
1481             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1482             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1483             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1484             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1485                        br->topology_change_detected) ||
1486             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
1487             nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
1488                 return -EMSGSIZE;
1489
1490 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1491         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1492             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1493             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1494                        br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1495             nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1496                        br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)))
1497                 return -EMSGSIZE;
1498 #endif
1499 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1500         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1501             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1502                        br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1503             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1504                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1505             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1506                        br_opt_get(br, BROPT_MULTICAST_QUERIER)) ||
1507             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1508                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1509             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
1510             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1511             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1512                         br->multicast_last_member_count) ||
1513             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1514                         br->multicast_startup_query_count) ||
1515             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1516                        br->multicast_igmp_version))
1517                 return -EMSGSIZE;
1518 #if IS_ENABLED(CONFIG_IPV6)
1519         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1520                        br->multicast_mld_version))
1521                 return -EMSGSIZE;
1522 #endif
1523         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1524         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1525                               IFLA_BR_PAD))
1526                 return -EMSGSIZE;
1527         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1528         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1529                               IFLA_BR_PAD))
1530                 return -EMSGSIZE;
1531         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1532         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1533                               IFLA_BR_PAD))
1534                 return -EMSGSIZE;
1535         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1536         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1537                               IFLA_BR_PAD))
1538                 return -EMSGSIZE;
1539         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1540         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1541                               IFLA_BR_PAD))
1542                 return -EMSGSIZE;
1543         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1544         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1545                               IFLA_BR_PAD))
1546                 return -EMSGSIZE;
1547 #endif
1548 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1549         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1550                        br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1551             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1552                        br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1553             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1554                        br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1555                 return -EMSGSIZE;
1556 #endif
1557
1558         return 0;
1559 }
1560
1561 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1562 {
1563         struct net_bridge_port *p = NULL;
1564         struct net_bridge_vlan_group *vg;
1565         struct net_bridge_vlan *v;
1566         struct net_bridge *br;
1567         int numvls = 0;
1568
1569         switch (attr) {
1570         case IFLA_STATS_LINK_XSTATS:
1571                 br = netdev_priv(dev);
1572                 vg = br_vlan_group(br);
1573                 break;
1574         case IFLA_STATS_LINK_XSTATS_SLAVE:
1575                 p = br_port_get_rtnl(dev);
1576                 if (!p)
1577                         return 0;
1578                 br = p->br;
1579                 vg = nbp_vlan_group(p);
1580                 break;
1581         default:
1582                 return 0;
1583         }
1584
1585         if (vg) {
1586                 /* we need to count all, even placeholder entries */
1587                 list_for_each_entry(v, &vg->vlan_list, vlist)
1588                         numvls++;
1589         }
1590
1591         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1592                nla_total_size(sizeof(struct br_mcast_stats)) +
1593                nla_total_size(0);
1594 }
1595
1596 static int br_fill_linkxstats(struct sk_buff *skb,
1597                               const struct net_device *dev,
1598                               int *prividx, int attr)
1599 {
1600         struct nlattr *nla __maybe_unused;
1601         struct net_bridge_port *p = NULL;
1602         struct net_bridge_vlan_group *vg;
1603         struct net_bridge_vlan *v;
1604         struct net_bridge *br;
1605         struct nlattr *nest;
1606         int vl_idx = 0;
1607
1608         switch (attr) {
1609         case IFLA_STATS_LINK_XSTATS:
1610                 br = netdev_priv(dev);
1611                 vg = br_vlan_group(br);
1612                 break;
1613         case IFLA_STATS_LINK_XSTATS_SLAVE:
1614                 p = br_port_get_rtnl(dev);
1615                 if (!p)
1616                         return 0;
1617                 br = p->br;
1618                 vg = nbp_vlan_group(p);
1619                 break;
1620         default:
1621                 return -EINVAL;
1622         }
1623
1624         nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE);
1625         if (!nest)
1626                 return -EMSGSIZE;
1627
1628         if (vg) {
1629                 u16 pvid;
1630
1631                 pvid = br_get_pvid(vg);
1632                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1633                         struct bridge_vlan_xstats vxi;
1634                         struct br_vlan_stats stats;
1635
1636                         if (++vl_idx < *prividx)
1637                                 continue;
1638                         memset(&vxi, 0, sizeof(vxi));
1639                         vxi.vid = v->vid;
1640                         vxi.flags = v->flags;
1641                         if (v->vid == pvid)
1642                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1643                         br_vlan_get_stats(v, &stats);
1644                         vxi.rx_bytes = stats.rx_bytes;
1645                         vxi.rx_packets = stats.rx_packets;
1646                         vxi.tx_bytes = stats.tx_bytes;
1647                         vxi.tx_packets = stats.tx_packets;
1648
1649                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1650                                 goto nla_put_failure;
1651                 }
1652         }
1653
1654 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1655         if (++vl_idx >= *prividx) {
1656                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1657                                         sizeof(struct br_mcast_stats),
1658                                         BRIDGE_XSTATS_PAD);
1659                 if (!nla)
1660                         goto nla_put_failure;
1661                 br_multicast_get_stats(br, p, nla_data(nla));
1662         }
1663 #endif
1664
1665         if (p) {
1666                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP,
1667                                         sizeof(p->stp_xstats),
1668                                         BRIDGE_XSTATS_PAD);
1669                 if (!nla)
1670                         goto nla_put_failure;
1671
1672                 spin_lock_bh(&br->lock);
1673                 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats));
1674                 spin_unlock_bh(&br->lock);
1675         }
1676
1677         nla_nest_end(skb, nest);
1678         *prividx = 0;
1679
1680         return 0;
1681
1682 nla_put_failure:
1683         nla_nest_end(skb, nest);
1684         *prividx = vl_idx;
1685
1686         return -EMSGSIZE;
1687 }
1688
1689 static struct rtnl_af_ops br_af_ops __read_mostly = {
1690         .family                 = AF_BRIDGE,
1691         .get_link_af_size       = br_get_link_af_size_filtered,
1692 };
1693
1694 struct rtnl_link_ops br_link_ops __read_mostly = {
1695         .kind                   = "bridge",
1696         .priv_size              = sizeof(struct net_bridge),
1697         .setup                  = br_dev_setup,
1698         .maxtype                = IFLA_BR_MAX,
1699         .policy                 = br_policy,
1700         .validate               = br_validate,
1701         .newlink                = br_dev_newlink,
1702         .changelink             = br_changelink,
1703         .dellink                = br_dev_delete,
1704         .get_size               = br_get_size,
1705         .fill_info              = br_fill_info,
1706         .fill_linkxstats        = br_fill_linkxstats,
1707         .get_linkxstats_size    = br_get_linkxstats_size,
1708
1709         .slave_maxtype          = IFLA_BRPORT_MAX,
1710         .slave_policy           = br_port_policy,
1711         .slave_changelink       = br_port_slave_changelink,
1712         .get_slave_size         = br_port_get_slave_size,
1713         .fill_slave_info        = br_port_fill_slave_info,
1714 };
1715
1716 int __init br_netlink_init(void)
1717 {
1718         int err;
1719
1720         br_mdb_init();
1721         br_vlan_rtnl_init();
1722         rtnl_af_register(&br_af_ops);
1723
1724         err = rtnl_link_register(&br_link_ops);
1725         if (err)
1726                 goto out_af;
1727
1728         return 0;
1729
1730 out_af:
1731         rtnl_af_unregister(&br_af_ops);
1732         br_mdb_uninit();
1733         return err;
1734 }
1735
1736 void br_netlink_fini(void)
1737 {
1738         br_mdb_uninit();
1739         br_vlan_rtnl_uninit();
1740         rtnl_af_unregister(&br_af_ops);
1741         rtnl_link_unregister(&br_link_ops);
1742 }