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 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         int err, rtm_cmd;
 572
 573         if (!br_vlan_valid_id(vinfo_curr->vid, extack))
 574                 return -EINVAL;
 575
 576         /* needed for vlan-only NEWVLAN/DELVLAN notifications */
 577         rtm_cmd = br_afspec_cmd_to_rtm(cmd);
 578
 579         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 580                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 581                         return -EINVAL;
 582                 *vinfo_last = vinfo_curr;
 583                 return 0;
 584         }
 585
 586         if (*vinfo_last) {
 587                 struct bridge_vlan_info tmp_vinfo;
 588                 int v, v_change_start = 0;
 589
 590                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 591                         return -EINVAL;
 592
 593                 memcpy(&tmp_vinfo, *vinfo_last,
 594                        sizeof(struct bridge_vlan_info));
 595                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
 596                         bool curr_change = false;
 597
 598                         tmp_vinfo.vid = v;
 599                         err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change,
 600                                            extack);
 601                         if (err)
 602                                 break;
 603                         if (curr_change) {
 604                                 *changed = curr_change;
 605                                 if (!v_change_start)
 606                                         v_change_start = v;
 607                         } else {
 608                                 /* nothing to notify yet */
 609                                 if (!v_change_start)
 610                                         continue;
 611                                 br_vlan_notify(br, p, v_change_start,
 612                                                v - 1, rtm_cmd);
 613                                 v_change_start = 0;
 614                         }
 615                         cond_resched();
 616                 }
 617                 /* v_change_start is set only if the last/whole range changed */
 618                 if (v_change_start)
 619                         br_vlan_notify(br, p, v_change_start,
 620                                        v - 1, rtm_cmd);
 621
 622                 *vinfo_last = NULL;
 623
 624                 return err;
 625         }
 626
 627         err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
 628         if (*changed)
 629                 br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd);
 630
 631         return err;
 632 }
 633
 634 static int br_afspec(struct net_bridge *br,
 635                      struct net_bridge_port *p,
 636                      struct nlattr *af_spec,
 637                      int cmd, bool *changed,
 638                      struct netlink_ext_ack *extack)
 639 {
 640         struct bridge_vlan_info *vinfo_curr = NULL;
 641         struct bridge_vlan_info *vinfo_last = NULL;
 642         struct nlattr *attr;
 643         struct vtunnel_info tinfo_last = {};
 644         struct vtunnel_info tinfo_curr = {};
 645         int err = 0, rem;
 646
 647         nla_for_each_nested(attr, af_spec, rem) {
 648                 err = 0;
 649                 switch (nla_type(attr)) {
 650                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
 651                         if (!p || !(p->flags & BR_VLAN_TUNNEL))
 652                                 return -EINVAL;
 653                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
 654                         if (err)
 655                                 return err;
 656                         err = br_process_vlan_tunnel_info(br, p, cmd,
 657                                                           &tinfo_curr,
 658                                                           &tinfo_last,
 659                                                           changed);
 660                         if (err)
 661                                 return err;
 662                         break;
 663                 case IFLA_BRIDGE_VLAN_INFO:
 664                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 665                                 return -EINVAL;
 666                         vinfo_curr = nla_data(attr);
 667                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
 668                                                    &vinfo_last, changed,
 669                                                    extack);
 670                         if (err)
 671                                 return err;
 672                         break;
 673                 }
 674         }
 675
 676         return err;
 677 }
 678
 679 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 680         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 681         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 682         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 683         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 684         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 685         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 686         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 687         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 688         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 689         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 690         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 691         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 692         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
 693         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
 694         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
 695         [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
 696         [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
 697         [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
 698         [IFLA_BRPORT_ISOLATED]  = { .type = NLA_U8 },
 699         [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
 700 };
 701
 702 /* Change the state of the port and notify spanning tree */
 703 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 704 {
 705         if (state > BR_STATE_BLOCKING)
 706                 return -EINVAL;
 707
 708         /* if kernel STP is running, don't allow changes */
 709         if (p->br->stp_enabled == BR_KERNEL_STP)
 710                 return -EBUSY;
 711
 712         /* if device is not up, change is not allowed
 713          * if link is not present, only allowable state is disabled
 714          */
 715         if (!netif_running(p->dev) ||
 716             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 717                 return -ENETDOWN;
 718
 719         br_set_state(p, state);
 720         br_port_state_selection(p->br);
 721         return 0;
 722 }
 723
 724 /* Set/clear or port flags based on attribute */
 725 static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 726                             int attrtype, unsigned long mask)
 727 {
 728         unsigned long flags;
 729         int err;
 730
 731         if (!tb[attrtype])
 732                 return 0;
 733
 734         if (nla_get_u8(tb[attrtype]))
 735                 flags = p->flags | mask;
 736         else
 737                 flags = p->flags & ~mask;
 738
 739         err = br_switchdev_set_port_flag(p, flags, mask);
 740         if (err)
 741                 return err;
 742
 743         p->flags = flags;
 744         return 0;
 745 }
 746
 747 /* Process bridge protocol info on port */
 748 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 749 {
 750         unsigned long old_flags = p->flags;
 751         bool br_vlan_tunnel_old = false;
 752         int err;
 753
 754         err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 755         if (err)
 756                 return err;
 757
 758         err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 759         if (err)
 760                 return err;
 761
 762         err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 763         if (err)
 764                 return err;
 765
 766         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 767         if (err)
 768                 return err;
 769
 770         err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 771         if (err)
 772                 return err;
 773
 774         err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 775         if (err)
 776                 return err;
 777
 778         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
 779         if (err)
 780                 return err;
 781
 782         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
 783         if (err)
 784                 return err;
 785
 786         err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
 787         if (err)
 788                 return err;
 789
 790         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 791         if (err)
 792                 return err;
 793
 794         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 795         if (err)
 796                 return err;
 797
 798         br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
 799         err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
 800         if (err)
 801                 return err;
 802
 803         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
 804                 nbp_vlan_tunnel_info_flush(p);
 805
 806         if (tb[IFLA_BRPORT_COST]) {
 807                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 808                 if (err)
 809                         return err;
 810         }
 811
 812         if (tb[IFLA_BRPORT_PRIORITY]) {
 813                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 814                 if (err)
 815                         return err;
 816         }
 817
 818         if (tb[IFLA_BRPORT_STATE]) {
 819                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 820                 if (err)
 821                         return err;
 822         }
 823
 824         if (tb[IFLA_BRPORT_FLUSH])
 825                 br_fdb_delete_by_port(p->br, p, 0, 0);
 826
 827 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 828         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 829                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 830
 831                 err = br_multicast_set_port_router(p, mcast_router);
 832                 if (err)
 833                         return err;
 834         }
 835 #endif
 836
 837         if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
 838                 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
 839
 840                 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
 841                         return -EINVAL;
 842                 p->group_fwd_mask = fwd_mask;
 843         }
 844
 845         err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
 846                                BR_NEIGH_SUPPRESS);
 847         if (err)
 848                 return err;
 849
 850         err = br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
 851         if (err)
 852                 return err;
 853
 854         if (tb[IFLA_BRPORT_BACKUP_PORT]) {
 855                 struct net_device *backup_dev = NULL;
 856                 u32 backup_ifindex;
 857
 858                 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
 859                 if (backup_ifindex) {
 860                         backup_dev = __dev_get_by_index(dev_net(p->dev),
 861                                                         backup_ifindex);
 862                         if (!backup_dev)
 863                                 return -ENOENT;
 864                 }
 865
 866                 err = nbp_backup_change(p, backup_dev);
 867                 if (err)
 868                         return err;
 869         }
 870
 871         br_port_flags_change(p, old_flags ^ p->flags);
 872         return 0;
 873 }
 874
 875 /* Change state and parameters on port. */
 876 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags,
 877                struct netlink_ext_ack *extack)
 878 {
 879         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
 880         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
 881         struct net_bridge_port *p;
 882         struct nlattr *protinfo;
 883         struct nlattr *afspec;
 884         bool changed = false;
 885         int err = 0;
 886
 887         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
 888         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 889         if (!protinfo && !afspec)
 890                 return 0;
 891
 892         p = br_port_get_rtnl(dev);
 893         /* We want to accept dev as bridge itself if the AF_SPEC
 894          * is set to see if someone is setting vlan info on the bridge
 895          */
 896         if (!p && !afspec)
 897                 return -EINVAL;
 898
 899         if (p && protinfo) {
 900                 if (protinfo->nla_type & NLA_F_NESTED) {
 901                         err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX,
 902                                                           protinfo,
 903                                                           br_port_policy,
 904                                                           NULL);
 905                         if (err)
 906                                 return err;
 907
 908                         spin_lock_bh(&p->br->lock);
 909                         err = br_setport(p, tb);
 910                         spin_unlock_bh(&p->br->lock);
 911                 } else {
 912                         /* Binary compatibility with old RSTP */
 913                         if (nla_len(protinfo) < sizeof(u8))
 914                                 return -EINVAL;
 915
 916                         spin_lock_bh(&p->br->lock);
 917                         err = br_set_port_state(p, nla_get_u8(protinfo));
 918                         spin_unlock_bh(&p->br->lock);
 919                 }
 920                 if (err)
 921                         goto out;
 922                 changed = true;
 923         }
 924
 925         if (afspec)
 926                 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
 927
 928         if (changed)
 929                 br_ifinfo_notify(RTM_NEWLINK, br, p);
 930 out:
 931         return err;
 932 }
 933
 934 /* Delete port information */
 935 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
 936 {
 937         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
 938         struct net_bridge_port *p;
 939         struct nlattr *afspec;
 940         bool changed = false;
 941         int err = 0;
 942
 943         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
 944         if (!afspec)
 945                 return 0;
 946
 947         p = br_port_get_rtnl(dev);
 948         /* We want to accept dev as bridge itself as well */
 949         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
 950                 return -EINVAL;
 951
 952         err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL);
 953         if (changed)
 954                 /* Send RTM_NEWLINK because userspace
 955                  * expects RTM_NEWLINK for vlan dels
 956                  */
 957                 br_ifinfo_notify(RTM_NEWLINK, br, p);
 958
 959         return err;
 960 }
 961
 962 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
 963                        struct netlink_ext_ack *extack)
 964 {
 965         if (tb[IFLA_ADDRESS]) {
 966                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 967                         return -EINVAL;
 968                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 969                         return -EADDRNOTAVAIL;
 970         }
 971
 972         if (!data)
 973                 return 0;
 974
 975 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 976         if (data[IFLA_BR_VLAN_PROTOCOL]) {
 977                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
 978                 case htons(ETH_P_8021Q):
 979                 case htons(ETH_P_8021AD):
 980                         break;
 981                 default:
 982                         return -EPROTONOSUPPORT;
 983                 }
 984         }
 985
 986         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
 987                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
 988
 989                 if (defpvid >= VLAN_VID_MASK)
 990                         return -EINVAL;
 991         }
 992 #endif
 993
 994         return 0;
 995 }
 996
 997 static int br_port_slave_changelink(struct net_device *brdev,
 998                                     struct net_device *dev,
 999                                     struct nlattr *tb[],
1000                                     struct nlattr *data[],
1001                                     struct netlink_ext_ack *extack)
1002 {
1003         struct net_bridge *br = netdev_priv(brdev);
1004         int ret;
1005
1006         if (!data)
1007                 return 0;
1008
1009         spin_lock_bh(&br->lock);
1010         ret = br_setport(br_port_get_rtnl(dev), data);
1011         spin_unlock_bh(&br->lock);
1012
1013         return ret;
1014 }
1015
1016 static int br_port_fill_slave_info(struct sk_buff *skb,
1017                                    const struct net_device *brdev,
1018                                    const struct net_device *dev)
1019 {
1020         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
1021 }
1022
1023 static size_t br_port_get_slave_size(const struct net_device *brdev,
1024                                      const struct net_device *dev)
1025 {
1026         return br_port_info_size();
1027 }
1028
1029 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1030         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1031         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
1032         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
1033         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1034         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1035         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1036         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1037         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1038         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1039         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1040                                  .len  = ETH_ALEN },
1041         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1042         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1043         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1044         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1045         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1046         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1047         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1048         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1049         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1050         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1051         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1052         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1053         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1054         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1055         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1056         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1057         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1058         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1059         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1060         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1061         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1062         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1063         [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1064         [IFLA_BR_MULTI_BOOLOPT] = { .type = NLA_EXACT_LEN,
1065                                     .len = sizeof(struct br_boolopt_multi) },
1066 };
1067
1068 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1069                          struct nlattr *data[],
1070                          struct netlink_ext_ack *extack)
1071 {
1072         struct net_bridge *br = netdev_priv(brdev);
1073         int err;
1074
1075         if (!data)
1076                 return 0;
1077
1078         if (data[IFLA_BR_FORWARD_DELAY]) {
1079                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1080                 if (err)
1081                         return err;
1082         }
1083
1084         if (data[IFLA_BR_HELLO_TIME]) {
1085                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1086                 if (err)
1087                         return err;
1088         }
1089
1090         if (data[IFLA_BR_MAX_AGE]) {
1091                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1092                 if (err)
1093                         return err;
1094         }
1095
1096         if (data[IFLA_BR_AGEING_TIME]) {
1097                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1098                 if (err)
1099                         return err;
1100         }
1101
1102         if (data[IFLA_BR_STP_STATE]) {
1103                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1104
1105                 br_stp_set_enabled(br, stp_enabled);
1106         }
1107
1108         if (data[IFLA_BR_PRIORITY]) {
1109                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1110
1111                 br_stp_set_bridge_priority(br, priority);
1112         }
1113
1114         if (data[IFLA_BR_VLAN_FILTERING]) {
1115                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1116
1117                 err = __br_vlan_filter_toggle(br, vlan_filter);
1118                 if (err)
1119                         return err;
1120         }
1121
1122 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1123         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1124                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1125
1126                 err = __br_vlan_set_proto(br, vlan_proto);
1127                 if (err)
1128                         return err;
1129         }
1130
1131         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1132                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1133
1134                 err = __br_vlan_set_default_pvid(br, defpvid, extack);
1135                 if (err)
1136                         return err;
1137         }
1138
1139         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1140                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1141
1142                 err = br_vlan_set_stats(br, vlan_stats);
1143                 if (err)
1144                         return err;
1145         }
1146
1147         if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1148                 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1149
1150                 err = br_vlan_set_stats_per_port(br, per_port);
1151                 if (err)
1152                         return err;
1153         }
1154 #endif
1155
1156         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1157                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1158
1159                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1160                         return -EINVAL;
1161                 br->group_fwd_mask = fwd_mask;
1162         }
1163
1164         if (data[IFLA_BR_GROUP_ADDR]) {
1165                 u8 new_addr[ETH_ALEN];
1166
1167                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1168                         return -EINVAL;
1169                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1170                 if (!is_link_local_ether_addr(new_addr))
1171                         return -EINVAL;
1172                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1173                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1174                     new_addr[5] == 3)           /* 802.1X PAE address */
1175                         return -EINVAL;
1176                 spin_lock_bh(&br->lock);
1177                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1178                 spin_unlock_bh(&br->lock);
1179                 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1180                 br_recalculate_fwd_mask(br);
1181         }
1182
1183         if (data[IFLA_BR_FDB_FLUSH])
1184                 br_fdb_flush(br);
1185
1186 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1187         if (data[IFLA_BR_MCAST_ROUTER]) {
1188                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1189
1190                 err = br_multicast_set_router(br, multicast_router);
1191                 if (err)
1192                         return err;
1193         }
1194
1195         if (data[IFLA_BR_MCAST_SNOOPING]) {
1196                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1197
1198                 br_multicast_toggle(br, mcast_snooping);
1199         }
1200
1201         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1202                 u8 val;
1203
1204                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1205                 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1206         }
1207
1208         if (data[IFLA_BR_MCAST_QUERIER]) {
1209                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1210
1211                 err = br_multicast_set_querier(br, mcast_querier);
1212                 if (err)
1213                         return err;
1214         }
1215
1216         if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
1217                 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
1218                         RHT_ELASTICITY);
1219
1220         if (data[IFLA_BR_MCAST_HASH_MAX])
1221                 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1222
1223         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1224                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1225
1226                 br->multicast_last_member_count = val;
1227         }
1228
1229         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1230                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1231
1232                 br->multicast_startup_query_count = val;
1233         }
1234
1235         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1236                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1237
1238                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1239         }
1240
1241         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1242                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1243
1244                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1245         }
1246
1247         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1248                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1249
1250                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1251         }
1252
1253         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1254                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1255
1256                 br->multicast_query_interval = clock_t_to_jiffies(val);
1257         }
1258
1259         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1260                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1261
1262                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1263         }
1264
1265         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1266                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1267
1268                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1269         }
1270
1271         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1272                 __u8 mcast_stats;
1273
1274                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1275                 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1276         }
1277
1278         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1279                 __u8 igmp_version;
1280
1281                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1282                 err = br_multicast_set_igmp_version(br, igmp_version);
1283                 if (err)
1284                         return err;
1285         }
1286
1287 #if IS_ENABLED(CONFIG_IPV6)
1288         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1289                 __u8 mld_version;
1290
1291                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1292                 err = br_multicast_set_mld_version(br, mld_version);
1293                 if (err)
1294                         return err;
1295         }
1296 #endif
1297 #endif
1298 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1299         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1300                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1301
1302                 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1303         }
1304
1305         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1306                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1307
1308                 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1309         }
1310
1311         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1312                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1313
1314                 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1315         }
1316 #endif
1317
1318         if (data[IFLA_BR_MULTI_BOOLOPT]) {
1319                 struct br_boolopt_multi *bm;
1320
1321                 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
1322                 err = br_boolopt_multi_toggle(br, bm, extack);
1323                 if (err)
1324                         return err;
1325         }
1326
1327         return 0;
1328 }
1329
1330 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1331                           struct nlattr *tb[], struct nlattr *data[],
1332                           struct netlink_ext_ack *extack)
1333 {
1334         struct net_bridge *br = netdev_priv(dev);
1335         int err;
1336
1337         err = register_netdevice(dev);
1338         if (err)
1339                 return err;
1340
1341         if (tb[IFLA_ADDRESS]) {
1342                 spin_lock_bh(&br->lock);
1343                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1344                 spin_unlock_bh(&br->lock);
1345         }
1346
1347         err = br_changelink(dev, tb, data, extack);
1348         if (err)
1349                 br_dev_delete(dev, NULL);
1350
1351         return err;
1352 }
1353
1354 static size_t br_get_size(const struct net_device *brdev)
1355 {
1356         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1357                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1358                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1359                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1360                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1361                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1362                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1363 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1364                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1365                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1366                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1367                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_PER_PORT */
1368 #endif
1369                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1370                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1371                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1372                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1373                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1374                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1375                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1376                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1377                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1378                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1379                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1380                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1381 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1382                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1383                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1384                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1385                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1386                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1387                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1388                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1389                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1390                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1391                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1392                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1393                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1394                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1395                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1396                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1397                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1398                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1399 #endif
1400 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1401                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1402                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1403                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1404 #endif
1405                nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
1406                0;
1407 }
1408
1409 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1410 {
1411         struct net_bridge *br = netdev_priv(brdev);
1412         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1413         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1414         u32 age_time = jiffies_to_clock_t(br->max_age);
1415         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1416         u32 stp_enabled = br->stp_enabled;
1417         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1418         u8 vlan_enabled = br_vlan_enabled(br->dev);
1419         struct br_boolopt_multi bm;
1420         u64 clockval;
1421
1422         clockval = br_timer_value(&br->hello_timer);
1423         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1424                 return -EMSGSIZE;
1425         clockval = br_timer_value(&br->tcn_timer);
1426         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1427                 return -EMSGSIZE;
1428         clockval = br_timer_value(&br->topology_change_timer);
1429         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1430                               IFLA_BR_PAD))
1431                 return -EMSGSIZE;
1432         clockval = br_timer_value(&br->gc_work.timer);
1433         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1434                 return -EMSGSIZE;
1435
1436         br_boolopt_multi_get(br, &bm);
1437         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1438             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1439             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1440             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1441             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1442             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1443             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1444             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1445             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1446                     &br->bridge_id) ||
1447             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1448                     &br->designated_root) ||
1449             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1450             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1451             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1452             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1453                        br->topology_change_detected) ||
1454             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
1455             nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
1456                 return -EMSGSIZE;
1457
1458 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1459         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1460             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1461             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1462                        br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1463             nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1464                        br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)))
1465                 return -EMSGSIZE;
1466 #endif
1467 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1468         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1469             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1470                        br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1471             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1472                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1473             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1474                        br_opt_get(br, BROPT_MULTICAST_QUERIER)) ||
1475             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1476                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1477             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
1478             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1479             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1480                         br->multicast_last_member_count) ||
1481             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1482                         br->multicast_startup_query_count) ||
1483             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1484                        br->multicast_igmp_version))
1485                 return -EMSGSIZE;
1486 #if IS_ENABLED(CONFIG_IPV6)
1487         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1488                        br->multicast_mld_version))
1489                 return -EMSGSIZE;
1490 #endif
1491         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1492         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1493                               IFLA_BR_PAD))
1494                 return -EMSGSIZE;
1495         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1496         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1497                               IFLA_BR_PAD))
1498                 return -EMSGSIZE;
1499         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1500         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1501                               IFLA_BR_PAD))
1502                 return -EMSGSIZE;
1503         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1504         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1505                               IFLA_BR_PAD))
1506                 return -EMSGSIZE;
1507         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1508         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1509                               IFLA_BR_PAD))
1510                 return -EMSGSIZE;
1511         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1512         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1513                               IFLA_BR_PAD))
1514                 return -EMSGSIZE;
1515 #endif
1516 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1517         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1518                        br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1519             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1520                        br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1521             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1522                        br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1523                 return -EMSGSIZE;
1524 #endif
1525
1526         return 0;
1527 }
1528
1529 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1530 {
1531         struct net_bridge_port *p = NULL;
1532         struct net_bridge_vlan_group *vg;
1533         struct net_bridge_vlan *v;
1534         struct net_bridge *br;
1535         int numvls = 0;
1536
1537         switch (attr) {
1538         case IFLA_STATS_LINK_XSTATS:
1539                 br = netdev_priv(dev);
1540                 vg = br_vlan_group(br);
1541                 break;
1542         case IFLA_STATS_LINK_XSTATS_SLAVE:
1543                 p = br_port_get_rtnl(dev);
1544                 if (!p)
1545                         return 0;
1546                 br = p->br;
1547                 vg = nbp_vlan_group(p);
1548                 break;
1549         default:
1550                 return 0;
1551         }
1552
1553         if (vg) {
1554                 /* we need to count all, even placeholder entries */
1555                 list_for_each_entry(v, &vg->vlan_list, vlist)
1556                         numvls++;
1557         }
1558
1559         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1560                nla_total_size(sizeof(struct br_mcast_stats)) +
1561                nla_total_size(0);
1562 }
1563
1564 static int br_fill_linkxstats(struct sk_buff *skb,
1565                               const struct net_device *dev,
1566                               int *prividx, int attr)
1567 {
1568         struct nlattr *nla __maybe_unused;
1569         struct net_bridge_port *p = NULL;
1570         struct net_bridge_vlan_group *vg;
1571         struct net_bridge_vlan *v;
1572         struct net_bridge *br;
1573         struct nlattr *nest;
1574         int vl_idx = 0;
1575
1576         switch (attr) {
1577         case IFLA_STATS_LINK_XSTATS:
1578                 br = netdev_priv(dev);
1579                 vg = br_vlan_group(br);
1580                 break;
1581         case IFLA_STATS_LINK_XSTATS_SLAVE:
1582                 p = br_port_get_rtnl(dev);
1583                 if (!p)
1584                         return 0;
1585                 br = p->br;
1586                 vg = nbp_vlan_group(p);
1587                 break;
1588         default:
1589                 return -EINVAL;
1590         }
1591
1592         nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE);
1593         if (!nest)
1594                 return -EMSGSIZE;
1595
1596         if (vg) {
1597                 u16 pvid;
1598
1599                 pvid = br_get_pvid(vg);
1600                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1601                         struct bridge_vlan_xstats vxi;
1602                         struct br_vlan_stats stats;
1603
1604                         if (++vl_idx < *prividx)
1605                                 continue;
1606                         memset(&vxi, 0, sizeof(vxi));
1607                         vxi.vid = v->vid;
1608                         vxi.flags = v->flags;
1609                         if (v->vid == pvid)
1610                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1611                         br_vlan_get_stats(v, &stats);
1612                         vxi.rx_bytes = stats.rx_bytes;
1613                         vxi.rx_packets = stats.rx_packets;
1614                         vxi.tx_bytes = stats.tx_bytes;
1615                         vxi.tx_packets = stats.tx_packets;
1616
1617                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1618                                 goto nla_put_failure;
1619                 }
1620         }
1621
1622 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1623         if (++vl_idx >= *prividx) {
1624                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1625                                         sizeof(struct br_mcast_stats),
1626                                         BRIDGE_XSTATS_PAD);
1627                 if (!nla)
1628                         goto nla_put_failure;
1629                 br_multicast_get_stats(br, p, nla_data(nla));
1630         }
1631 #endif
1632
1633         if (p) {
1634                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP,
1635                                         sizeof(p->stp_xstats),
1636                                         BRIDGE_XSTATS_PAD);
1637                 if (!nla)
1638                         goto nla_put_failure;
1639
1640                 spin_lock_bh(&br->lock);
1641                 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats));
1642                 spin_unlock_bh(&br->lock);
1643         }
1644
1645         nla_nest_end(skb, nest);
1646         *prividx = 0;
1647
1648         return 0;
1649
1650 nla_put_failure:
1651         nla_nest_end(skb, nest);
1652         *prividx = vl_idx;
1653
1654         return -EMSGSIZE;
1655 }
1656
1657 static struct rtnl_af_ops br_af_ops __read_mostly = {
1658         .family                 = AF_BRIDGE,
1659         .get_link_af_size       = br_get_link_af_size_filtered,
1660 };
1661
1662 struct rtnl_link_ops br_link_ops __read_mostly = {
1663         .kind                   = "bridge",
1664         .priv_size              = sizeof(struct net_bridge),
1665         .setup                  = br_dev_setup,
1666         .maxtype                = IFLA_BR_MAX,
1667         .policy                 = br_policy,
1668         .validate               = br_validate,
1669         .newlink                = br_dev_newlink,
1670         .changelink             = br_changelink,
1671         .dellink                = br_dev_delete,
1672         .get_size               = br_get_size,
1673         .fill_info              = br_fill_info,
1674         .fill_linkxstats        = br_fill_linkxstats,
1675         .get_linkxstats_size    = br_get_linkxstats_size,
1676
1677         .slave_maxtype          = IFLA_BRPORT_MAX,
1678         .slave_policy           = br_port_policy,
1679         .slave_changelink       = br_port_slave_changelink,
1680         .get_slave_size         = br_port_get_slave_size,
1681         .fill_slave_info        = br_port_fill_slave_info,
1682 };
1683
1684 int __init br_netlink_init(void)
1685 {
1686         int err;
1687
1688         br_mdb_init();
1689         br_vlan_rtnl_init();
1690         rtnl_af_register(&br_af_ops);
1691
1692         err = rtnl_link_register(&br_link_ops);
1693         if (err)
1694                 goto out_af;
1695
1696         return 0;
1697
1698 out_af:
1699         rtnl_af_unregister(&br_af_ops);
1700         br_mdb_uninit();
1701         return err;
1702 }
1703
1704 void br_netlink_fini(void)
1705 {
1706         br_mdb_uninit();
1707         br_vlan_rtnl_uninit();
1708         rtnl_af_unregister(&br_af_ops);
1709         rtnl_link_unregister(&br_link_ops);
1710 }