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