net/bridge/br_netlink.c

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