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 (!br_vlan_valid_id(vinfo_curr->vid))
 572                 return -EINVAL;
 573
 574         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 575                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last))
 576                         return -EINVAL;
 577                 *vinfo_last = vinfo_curr;
 578                 return 0;
 579         }
 580
 581         if (*vinfo_last) {
 582                 struct bridge_vlan_info tmp_vinfo;
 583                 int v, err;
 584
 585                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last))
 586                         return -EINVAL;
 587
 588                 memcpy(&tmp_vinfo, *vinfo_last,
 589                        sizeof(struct bridge_vlan_info));
 590                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
 591                         tmp_vinfo.vid = v;
 592                         err = br_vlan_info(br, p, cmd, &tmp_vinfo, changed,
 593                                            extack);
 594                         if (err)
 595                                 break;
 596                 }
 597                 *vinfo_last = NULL;
 598
 599                 return err;
 600         }
 601
 602         return br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
 603 }
 604
 605 static int br_afspec(struct net_bridge *br,
 606                      struct net_bridge_port *p,
 607                      struct nlattr *af_spec,
 608                      int cmd, bool *changed,
 609                      struct netlink_ext_ack *extack)
 610 {
 611         struct bridge_vlan_info *vinfo_curr = NULL;
 612         struct bridge_vlan_info *vinfo_last = NULL;
 613         struct nlattr *attr;
 614         struct vtunnel_info tinfo_last = {};
 615         struct vtunnel_info tinfo_curr = {};
 616         int err = 0, rem;
 617
 618         nla_for_each_nested(attr, af_spec, rem) {
 619                 err = 0;
 620                 switch (nla_type(attr)) {
 621                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
 622                         if (!p || !(p->flags & BR_VLAN_TUNNEL))
 623                                 return -EINVAL;
 624                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
 625                         if (err)
 626                                 return err;
 627                         err = br_process_vlan_tunnel_info(br, p, cmd,
 628                                                           &tinfo_curr,
 629                                                           &tinfo_last,
 630                                                           changed);
 631                         if (err)
 632                                 return err;
 633                         break;
 634                 case IFLA_BRIDGE_VLAN_INFO:
 635                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 636                                 return -EINVAL;
 637                         vinfo_curr = nla_data(attr);
 638                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
 639                                                    &vinfo_last, changed,
 640                                                    extack);
 641                         if (err)
 642                                 return err;
 643                         break;
 644                 }
 645         }
 646
 647         return err;
 648 }
 649
 650 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 651         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 652         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 653         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 654         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 655         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 656         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 657         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 658         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 659         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 660         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 661         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 662         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 663         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
 664         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
 665         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
 666         [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
 667         [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
 668         [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
 669         [IFLA_BRPORT_ISOLATED]  = { .type = NLA_U8 },
 670         [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
 671 };
 672
 673 /* Change the state of the port and notify spanning tree */
 674 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 675 {
 676         if (state > BR_STATE_BLOCKING)
 677                 return -EINVAL;
 678
 679         /* if kernel STP is running, don't allow changes */
 680         if (p->br->stp_enabled == BR_KERNEL_STP)
 681                 return -EBUSY;
 682
 683         /* if device is not up, change is not allowed
 684          * if link is not present, only allowable state is disabled
 685          */
 686         if (!netif_running(p->dev) ||
 687             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 688                 return -ENETDOWN;
 689
 690         br_set_state(p, state);
 691         br_port_state_selection(p->br);
 692         return 0;
 693 }
 694
 695 /* Set/clear or port flags based on attribute */
 696 static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 697                             int attrtype, unsigned long mask)
 698 {
 699         unsigned long flags;
 700         int err;
 701
 702         if (!tb[attrtype])
 703                 return 0;
 704
 705         if (nla_get_u8(tb[attrtype]))
 706                 flags = p->flags | mask;
 707         else
 708                 flags = p->flags & ~mask;
 709
 710         err = br_switchdev_set_port_flag(p, flags, mask);
 711         if (err)
 712                 return err;
 713
 714         p->flags = flags;
 715         return 0;
 716 }
 717
 718 /* Process bridge protocol info on port */
 719 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 720 {
 721         unsigned long old_flags = p->flags;
 722         bool br_vlan_tunnel_old = false;
 723         int err;
 724
 725         err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 726         if (err)
 727                 return err;
 728
 729         err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 730         if (err)
 731                 return err;
 732
 733         err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 734         if (err)
 735                 return err;
 736
 737         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 738         if (err)
 739                 return err;
 740
 741         err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 742         if (err)
 743                 return err;
 744
 745         err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 746         if (err)
 747                 return err;
 748
 749         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
 750         if (err)
 751                 return err;
 752
 753         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
 754         if (err)
 755                 return err;
 756
 757         err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
 758         if (err)
 759                 return err;
 760
 761         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 762         if (err)
 763                 return err;
 764
 765         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 766         if (err)
 767                 return err;
 768
 769         br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
 770         err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
 771         if (err)
 772                 return err;
 773
 774         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
 775                 nbp_vlan_tunnel_info_flush(p);
 776
 777         if (tb[IFLA_BRPORT_COST]) {
 778                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 779                 if (err)
 780                         return err;
 781         }
 782
 783         if (tb[IFLA_BRPORT_PRIORITY]) {
 784                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 785                 if (err)
 786                         return err;
 787         }
 788
 789         if (tb[IFLA_BRPORT_STATE]) {
 790                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 791                 if (err)
 792                         return err;
 793         }
 794
 795         if (tb[IFLA_BRPORT_FLUSH])
 796                 br_fdb_delete_by_port(p->br, p, 0, 0);
 797
 798 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 799         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 800                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 801
 802                 err = br_multicast_set_port_router(p, mcast_router);
 803                 if (err)
 804                         return err;
 805         }
 806 #endif
 807
 808         if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
 809                 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
 810
 811                 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
 812                         return -EINVAL;
 813                 p->group_fwd_mask = fwd_mask;
 814         }
 815
 816         err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
 817                                BR_NEIGH_SUPPRESS);
 818         if (err)
 819                 return err;
 820
 821         err = br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
 822         if (err)
 823                 return err;
 824
 825         if (tb[IFLA_BRPORT_BACKUP_PORT]) {
 826                 struct net_device *backup_dev = NULL;
 827                 u32 backup_ifindex;
 828
 829                 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
 830                 if (backup_ifindex) {
 831                         backup_dev = __dev_get_by_index(dev_net(p->dev),
 832                                                         backup_ifindex);
 833                         if (!backup_dev)
 834                                 return -ENOENT;
 835                 }
 836
 837                 err = nbp_backup_change(p, backup_dev);
 838                 if (err)
 839                         return err;
 840         }
 841
 842         br_port_flags_change(p, old_flags ^ p->flags);
 843         return 0;
 844 }
 845
 846 /* Change state and parameters on port. */
 847 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags,
 848                struct netlink_ext_ack *extack)
 849 {
 850         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
 851         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 852         struct net_bridge_port *p;
 853         struct nlattr *protinfo;
 854         struct nlattr *afspec;
 855         bool changed = false;
 856         int err = 0;
 857
 858         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 859         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 860         if (!protinfo && !afspec)
 861                 return 0;
 862
 863         p = br_port_get_rtnl(dev);
 864         /* We want to accept dev as bridge itself if the AF_SPEC
 865          * is set to see if someone is setting vlan info on the bridge
 866          */
 867         if (!p && !afspec)
 868                 return -EINVAL;
 869
 870         if (p && protinfo) {
 871                 if (protinfo->nla_type & NLA_F_NESTED) {
 872                         err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX,
 873                                                           protinfo,
 874                                                           br_port_policy,
 875                                                           NULL);
 876                         if (err)
 877                                 return err;
 878
 879                         spin_lock_bh(&p->br->lock);
 880                         err = br_setport(p, tb);
 881                         spin_unlock_bh(&p->br->lock);
 882                 } else {
 883                         /* Binary compatibility with old RSTP */
 884                         if (nla_len(protinfo) < sizeof(u8))
 885                                 return -EINVAL;
 886
 887                         spin_lock_bh(&p->br->lock);
 888                         err = br_set_port_state(p, nla_get_u8(protinfo));
 889                         spin_unlock_bh(&p->br->lock);
 890                 }
 891                 if (err)
 892                         goto out;
 893                 changed = true;
 894         }
 895
 896         if (afspec)
 897                 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
 898
 899         if (changed)
 900                 br_ifinfo_notify(RTM_NEWLINK, br, p);
 901 out:
 902         return err;
 903 }
 904
 905 /* Delete port information */
 906 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 907 {
 908         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
 909         struct net_bridge_port *p;
 910         struct nlattr *afspec;
 911         bool changed = false;
 912         int err = 0;
 913
 914         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 915         if (!afspec)
 916                 return 0;
 917
 918         p = br_port_get_rtnl(dev);
 919         /* We want to accept dev as bridge itself as well */
 920         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
 921                 return -EINVAL;
 922
 923         err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL);
 924         if (changed)
 925                 /* Send RTM_NEWLINK because userspace
 926                  * expects RTM_NEWLINK for vlan dels
 927                  */
 928                 br_ifinfo_notify(RTM_NEWLINK, br, p);
 929
 930         return err;
 931 }
 932
 933 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
 934                        struct netlink_ext_ack *extack)
 935 {
 936         if (tb[IFLA_ADDRESS]) {
 937                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 938                         return -EINVAL;
 939                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 940                         return -EADDRNOTAVAIL;
 941         }
 942
 943         if (!data)
 944                 return 0;
 945
 946 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 947         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 948                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
 949                 case htons(ETH_P_8021Q):
 950                 case htons(ETH_P_8021AD):
 951                         break;
 952                 default:
 953                         return -EPROTONOSUPPORT;
 954                 }
 955         }
 956
 957         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 958                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 959
 960                 if (defpvid >= VLAN_VID_MASK)
 961                         return -EINVAL;
 962         }
 963 #endif
 964
 965         return 0;
 966 }
 967
 968 static int br_port_slave_changelink(struct net_device *brdev,
 969                                     struct net_device *dev,
 970                                     struct nlattr *tb[],
 971                                     struct nlattr *data[],
 972                                     struct netlink_ext_ack *extack)
 973 {
 974         struct net_bridge *br = netdev_priv(brdev);
 975         int ret;
 976
 977         if (!data)
 978                 return 0;
 979
 980         spin_lock_bh(&br->lock);
 981         ret = br_setport(br_port_get_rtnl(dev), data);
 982         spin_unlock_bh(&br->lock);
 983
 984         return ret;
 985 }
 986
 987 static int br_port_fill_slave_info(struct sk_buff *skb,
 988                                    const struct net_device *brdev,
 989                                    const struct net_device *dev)
 990 {
 991         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
 992 }
 993
 994 static size_t br_port_get_slave_size(const struct net_device *brdev,
 995                                      const struct net_device *dev)
 996 {
 997         return br_port_info_size();
 998 }
 999
1000 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1001         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1002         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
1003         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
1004         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1005         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1006         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1007         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1008         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1009         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1010         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1011                                  .len  = ETH_ALEN },
1012         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1013         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1014         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1015         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1016         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1017         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1018         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1019         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1020         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1021         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1022         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1023         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1024         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1025         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1026         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1027         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1028         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1029         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1030         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1031         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1032         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1033         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1034         [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1035         [IFLA_BR_MULTI_BOOLOPT] = { .type = NLA_EXACT_LEN,
1036                                     .len = sizeof(struct br_boolopt_multi) },
1037 };
1038
1039 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1040                          struct nlattr *data[],
1041                          struct netlink_ext_ack *extack)
1042 {
1043         struct net_bridge *br = netdev_priv(brdev);
1044         int err;
1045
1046         if (!data)
1047                 return 0;
1048
1049         if (data[IFLA_BR_FORWARD_DELAY]) {
1050                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1051                 if (err)
1052                         return err;
1053         }
1054
1055         if (data[IFLA_BR_HELLO_TIME]) {
1056                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1057                 if (err)
1058                         return err;
1059         }
1060
1061         if (data[IFLA_BR_MAX_AGE]) {
1062                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1063                 if (err)
1064                         return err;
1065         }
1066
1067         if (data[IFLA_BR_AGEING_TIME]) {
1068                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1069                 if (err)
1070                         return err;
1071         }
1072
1073         if (data[IFLA_BR_STP_STATE]) {
1074                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1075
1076                 br_stp_set_enabled(br, stp_enabled);
1077         }
1078
1079         if (data[IFLA_BR_PRIORITY]) {
1080                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1081
1082                 br_stp_set_bridge_priority(br, priority);
1083         }
1084
1085         if (data[IFLA_BR_VLAN_FILTERING]) {
1086                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1087
1088                 err = __br_vlan_filter_toggle(br, vlan_filter);
1089                 if (err)
1090                         return err;
1091         }
1092
1093 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1094         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1095                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1096
1097                 err = __br_vlan_set_proto(br, vlan_proto);
1098                 if (err)
1099                         return err;
1100         }
1101
1102         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1103                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1104
1105                 err = __br_vlan_set_default_pvid(br, defpvid, extack);
1106                 if (err)
1107                         return err;
1108         }
1109
1110         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1111                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1112
1113                 err = br_vlan_set_stats(br, vlan_stats);
1114                 if (err)
1115                         return err;
1116         }
1117
1118         if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1119                 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1120
1121                 err = br_vlan_set_stats_per_port(br, per_port);
1122                 if (err)
1123                         return err;
1124         }
1125 #endif
1126
1127         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1128                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1129
1130                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1131                         return -EINVAL;
1132                 br->group_fwd_mask = fwd_mask;
1133         }
1134
1135         if (data[IFLA_BR_GROUP_ADDR]) {
1136                 u8 new_addr[ETH_ALEN];
1137
1138                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1139                         return -EINVAL;
1140                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1141                 if (!is_link_local_ether_addr(new_addr))
1142                         return -EINVAL;
1143                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1144                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1145                     new_addr[5] == 3)           /* 802.1X PAE address */
1146                         return -EINVAL;
1147                 spin_lock_bh(&br->lock);
1148                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1149                 spin_unlock_bh(&br->lock);
1150                 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1151                 br_recalculate_fwd_mask(br);
1152         }
1153
1154         if (data[IFLA_BR_FDB_FLUSH])
1155                 br_fdb_flush(br);
1156
1157 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1158         if (data[IFLA_BR_MCAST_ROUTER]) {
1159                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1160
1161                 err = br_multicast_set_router(br, multicast_router);
1162                 if (err)
1163                         return err;
1164         }
1165
1166         if (data[IFLA_BR_MCAST_SNOOPING]) {
1167                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1168
1169                 br_multicast_toggle(br, mcast_snooping);
1170         }
1171
1172         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1173                 u8 val;
1174
1175                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1176                 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1177         }
1178
1179         if (data[IFLA_BR_MCAST_QUERIER]) {
1180                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1181
1182                 err = br_multicast_set_querier(br, mcast_querier);
1183                 if (err)
1184                         return err;
1185         }
1186
1187         if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
1188                 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
1189                         RHT_ELASTICITY);
1190
1191         if (data[IFLA_BR_MCAST_HASH_MAX])
1192                 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1193
1194         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1195                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1196
1197                 br->multicast_last_member_count = val;
1198         }
1199
1200         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1201                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1202
1203                 br->multicast_startup_query_count = val;
1204         }
1205
1206         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1207                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1208
1209                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1210         }
1211
1212         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1213                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1214
1215                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1216         }
1217
1218         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1219                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1220
1221                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1222         }
1223
1224         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1225                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1226
1227                 br->multicast_query_interval = clock_t_to_jiffies(val);
1228         }
1229
1230         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1231                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1232
1233                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1234         }
1235
1236         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1237                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1238
1239                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1240         }
1241
1242         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1243                 __u8 mcast_stats;
1244
1245                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1246                 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1247         }
1248
1249         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1250                 __u8 igmp_version;
1251
1252                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1253                 err = br_multicast_set_igmp_version(br, igmp_version);
1254                 if (err)
1255                         return err;
1256         }
1257
1258 #if IS_ENABLED(CONFIG_IPV6)
1259         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1260                 __u8 mld_version;
1261
1262                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1263                 err = br_multicast_set_mld_version(br, mld_version);
1264                 if (err)
1265                         return err;
1266         }
1267 #endif
1268 #endif
1269 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1270         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1271                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1272
1273                 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1274         }
1275
1276         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1277                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1278
1279                 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1280         }
1281
1282         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1283                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1284
1285                 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1286         }
1287 #endif
1288
1289         if (data[IFLA_BR_MULTI_BOOLOPT]) {
1290                 struct br_boolopt_multi *bm;
1291
1292                 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
1293                 err = br_boolopt_multi_toggle(br, bm, extack);
1294                 if (err)
1295                         return err;
1296         }
1297
1298         return 0;
1299 }
1300
1301 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1302                           struct nlattr *tb[], struct nlattr *data[],
1303                           struct netlink_ext_ack *extack)
1304 {
1305         struct net_bridge *br = netdev_priv(dev);
1306         int err;
1307
1308         err = register_netdevice(dev);
1309         if (err)
1310                 return err;
1311
1312         if (tb[IFLA_ADDRESS]) {
1313                 spin_lock_bh(&br->lock);
1314                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1315                 spin_unlock_bh(&br->lock);
1316         }
1317
1318         err = br_changelink(dev, tb, data, extack);
1319         if (err)
1320                 br_dev_delete(dev, NULL);
1321
1322         return err;
1323 }
1324
1325 static size_t br_get_size(const struct net_device *brdev)
1326 {
1327         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1328                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1329                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1330                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1331                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1332                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1333                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1334 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1335                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1336                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1337                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1338                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_PER_PORT */
1339 #endif
1340                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1341                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1342                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1343                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1344                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1345                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1346                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1347                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1348                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1349                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1350                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1351                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1352 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1353                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1354                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1355                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1356                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1357                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1358                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1359                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1360                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1361                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1362                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1363                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1364                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1365                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1366                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1367                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1368                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1369                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1370 #endif
1371 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1372                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1373                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1374                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1375 #endif
1376                nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
1377                0;
1378 }
1379
1380 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1381 {
1382         struct net_bridge *br = netdev_priv(brdev);
1383         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1384         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1385         u32 age_time = jiffies_to_clock_t(br->max_age);
1386         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1387         u32 stp_enabled = br->stp_enabled;
1388         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1389         u8 vlan_enabled = br_vlan_enabled(br->dev);
1390         struct br_boolopt_multi bm;
1391         u64 clockval;
1392
1393         clockval = br_timer_value(&br->hello_timer);
1394         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1395                 return -EMSGSIZE;
1396         clockval = br_timer_value(&br->tcn_timer);
1397         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1398                 return -EMSGSIZE;
1399         clockval = br_timer_value(&br->topology_change_timer);
1400         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1401                               IFLA_BR_PAD))
1402                 return -EMSGSIZE;
1403         clockval = br_timer_value(&br->gc_work.timer);
1404         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1405                 return -EMSGSIZE;
1406
1407         br_boolopt_multi_get(br, &bm);
1408         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1409             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1410             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1411             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1412             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1413             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1414             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1415             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1416             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1417                     &br->bridge_id) ||
1418             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1419                     &br->designated_root) ||
1420             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1421             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1422             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1423             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1424                        br->topology_change_detected) ||
1425             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
1426             nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
1427                 return -EMSGSIZE;
1428
1429 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1430         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1431             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1432             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1433                        br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1434             nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1435                        br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)))
1436                 return -EMSGSIZE;
1437 #endif
1438 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1439         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1440             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1441                        br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1442             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1443                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1444             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1445                        br_opt_get(br, BROPT_MULTICAST_QUERIER)) ||
1446             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1447                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1448             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
1449             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1450             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1451                         br->multicast_last_member_count) ||
1452             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1453                         br->multicast_startup_query_count) ||
1454             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1455                        br->multicast_igmp_version))
1456                 return -EMSGSIZE;
1457 #if IS_ENABLED(CONFIG_IPV6)
1458         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1459                        br->multicast_mld_version))
1460                 return -EMSGSIZE;
1461 #endif
1462         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1463         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1464                               IFLA_BR_PAD))
1465                 return -EMSGSIZE;
1466         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1467         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1468                               IFLA_BR_PAD))
1469                 return -EMSGSIZE;
1470         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1471         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1472                               IFLA_BR_PAD))
1473                 return -EMSGSIZE;
1474         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1475         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1476                               IFLA_BR_PAD))
1477                 return -EMSGSIZE;
1478         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1479         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1480                               IFLA_BR_PAD))
1481                 return -EMSGSIZE;
1482         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1483         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1484                               IFLA_BR_PAD))
1485                 return -EMSGSIZE;
1486 #endif
1487 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1488         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1489                        br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1490             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1491                        br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1492             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1493                        br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1494                 return -EMSGSIZE;
1495 #endif
1496
1497         return 0;
1498 }
1499
1500 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1501 {
1502         struct net_bridge_port *p = NULL;
1503         struct net_bridge_vlan_group *vg;
1504         struct net_bridge_vlan *v;
1505         struct net_bridge *br;
1506         int numvls = 0;
1507
1508         switch (attr) {
1509         case IFLA_STATS_LINK_XSTATS:
1510                 br = netdev_priv(dev);
1511                 vg = br_vlan_group(br);
1512                 break;
1513         case IFLA_STATS_LINK_XSTATS_SLAVE:
1514                 p = br_port_get_rtnl(dev);
1515                 if (!p)
1516                         return 0;
1517                 br = p->br;
1518                 vg = nbp_vlan_group(p);
1519                 break;
1520         default:
1521                 return 0;
1522         }
1523
1524         if (vg) {
1525                 /* we need to count all, even placeholder entries */
1526                 list_for_each_entry(v, &vg->vlan_list, vlist)
1527                         numvls++;
1528         }
1529
1530         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1531                nla_total_size(sizeof(struct br_mcast_stats)) +
1532                nla_total_size(0);
1533 }
1534
1535 static int br_fill_linkxstats(struct sk_buff *skb,
1536                               const struct net_device *dev,
1537                               int *prividx, int attr)
1538 {
1539         struct nlattr *nla __maybe_unused;
1540         struct net_bridge_port *p = NULL;
1541         struct net_bridge_vlan_group *vg;
1542         struct net_bridge_vlan *v;
1543         struct net_bridge *br;
1544         struct nlattr *nest;
1545         int vl_idx = 0;
1546
1547         switch (attr) {
1548         case IFLA_STATS_LINK_XSTATS:
1549                 br = netdev_priv(dev);
1550                 vg = br_vlan_group(br);
1551                 break;
1552         case IFLA_STATS_LINK_XSTATS_SLAVE:
1553                 p = br_port_get_rtnl(dev);
1554                 if (!p)
1555                         return 0;
1556                 br = p->br;
1557                 vg = nbp_vlan_group(p);
1558                 break;
1559         default:
1560                 return -EINVAL;
1561         }
1562
1563         nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE);
1564         if (!nest)
1565                 return -EMSGSIZE;
1566
1567         if (vg) {
1568                 u16 pvid;
1569
1570                 pvid = br_get_pvid(vg);
1571                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1572                         struct bridge_vlan_xstats vxi;
1573                         struct br_vlan_stats stats;
1574
1575                         if (++vl_idx < *prividx)
1576                                 continue;
1577                         memset(&vxi, 0, sizeof(vxi));
1578                         vxi.vid = v->vid;
1579                         vxi.flags = v->flags;
1580                         if (v->vid == pvid)
1581                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1582                         br_vlan_get_stats(v, &stats);
1583                         vxi.rx_bytes = stats.rx_bytes;
1584                         vxi.rx_packets = stats.rx_packets;
1585                         vxi.tx_bytes = stats.tx_bytes;
1586                         vxi.tx_packets = stats.tx_packets;
1587
1588                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1589                                 goto nla_put_failure;
1590                 }
1591         }
1592
1593 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1594         if (++vl_idx >= *prividx) {
1595                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1596                                         sizeof(struct br_mcast_stats),
1597                                         BRIDGE_XSTATS_PAD);
1598                 if (!nla)
1599                         goto nla_put_failure;
1600                 br_multicast_get_stats(br, p, nla_data(nla));
1601         }
1602 #endif
1603
1604         if (p) {
1605                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP,
1606                                         sizeof(p->stp_xstats),
1607                                         BRIDGE_XSTATS_PAD);
1608                 if (!nla)
1609                         goto nla_put_failure;
1610
1611                 spin_lock_bh(&br->lock);
1612                 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats));
1613                 spin_unlock_bh(&br->lock);
1614         }
1615
1616         nla_nest_end(skb, nest);
1617         *prividx = 0;
1618
1619         return 0;
1620
1621 nla_put_failure:
1622         nla_nest_end(skb, nest);
1623         *prividx = vl_idx;
1624
1625         return -EMSGSIZE;
1626 }
1627
1628 static struct rtnl_af_ops br_af_ops __read_mostly = {
1629         .family                 = AF_BRIDGE,
1630         .get_link_af_size       = br_get_link_af_size_filtered,
1631 };
1632
1633 struct rtnl_link_ops br_link_ops __read_mostly = {
1634         .kind                   = "bridge",
1635         .priv_size              = sizeof(struct net_bridge),
1636         .setup                  = br_dev_setup,
1637         .maxtype                = IFLA_BR_MAX,
1638         .policy                 = br_policy,
1639         .validate               = br_validate,
1640         .newlink                = br_dev_newlink,
1641         .changelink             = br_changelink,
1642         .dellink                = br_dev_delete,
1643         .get_size               = br_get_size,
1644         .fill_info              = br_fill_info,
1645         .fill_linkxstats        = br_fill_linkxstats,
1646         .get_linkxstats_size    = br_get_linkxstats_size,
1647
1648         .slave_maxtype          = IFLA_BRPORT_MAX,
1649         .slave_policy           = br_port_policy,
1650         .slave_changelink       = br_port_slave_changelink,
1651         .get_slave_size         = br_port_get_slave_size,
1652         .fill_slave_info        = br_port_fill_slave_info,
1653 };
1654
1655 int __init br_netlink_init(void)
1656 {
1657         int err;
1658
1659         br_mdb_init();
1660         rtnl_af_register(&br_af_ops);
1661
1662         err = rtnl_link_register(&br_link_ops);
1663         if (err)
1664                 goto out_af;
1665
1666         return 0;
1667
1668 out_af:
1669         rtnl_af_unregister(&br_af_ops);
1670         br_mdb_uninit();
1671         return err;
1672 }
1673
1674 void br_netlink_fini(void)
1675 {
1676         br_mdb_uninit();
1677         rtnl_af_unregister(&br_af_ops);
1678         rtnl_link_unregister(&br_link_ops);
1679 }