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_cfm.h"
  20 #include "br_private_tunnel.h"
  21
  22 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  23                                 u32 filter_mask)
  24 {
  25         struct net_bridge_vlan *v;
  26         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
  27         u16 flags, pvid;
  28         int num_vlans = 0;
  29
  30         if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
  31                 return 0;
  32
  33         pvid = br_get_pvid(vg);
  34         /* Count number of vlan infos */
  35         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
  36                 flags = 0;
  37                 /* only a context, bridge vlan not activated */
  38                 if (!br_vlan_should_use(v))
  39                         continue;
  40                 if (v->vid == pvid)
  41                         flags |= BRIDGE_VLAN_INFO_PVID;
  42
  43                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
  44                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
  45
  46                 if (vid_range_start == 0) {
  47                         goto initvars;
  48                 } else if ((v->vid - vid_range_end) == 1 &&
  49                         flags == vid_range_flags) {
  50                         vid_range_end = v->vid;
  51                         continue;
  52                 } else {
  53                         if ((vid_range_end - vid_range_start) > 0)
  54                                 num_vlans += 2;
  55                         else
  56                                 num_vlans += 1;
  57                 }
  58 initvars:
  59                 vid_range_start = v->vid;
  60                 vid_range_end = v->vid;
  61                 vid_range_flags = flags;
  62         }
  63
  64         if (vid_range_start != 0) {
  65                 if ((vid_range_end - vid_range_start) > 0)
  66                         num_vlans += 2;
  67                 else
  68                         num_vlans += 1;
  69         }
  70
  71         return num_vlans;
  72 }
  73
  74 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  75                                  u32 filter_mask)
  76 {
  77         int num_vlans;
  78
  79         if (!vg)
  80                 return 0;
  81
  82         if (filter_mask & RTEXT_FILTER_BRVLAN)
  83                 return vg->num_vlans;
  84
  85         rcu_read_lock();
  86         num_vlans = __get_num_vlan_infos(vg, filter_mask);
  87         rcu_read_unlock();
  88
  89         return num_vlans;
  90 }
  91
  92 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
  93                                            u32 filter_mask)
  94 {
  95         struct net_bridge_vlan_group *vg = NULL;
  96         struct net_bridge_port *p = NULL;
  97         struct net_bridge *br = NULL;
  98         u32 num_cfm_peer_mep_infos;
  99         u32 num_cfm_mep_infos;
 100         size_t vinfo_sz = 0;
 101         int num_vlan_infos;
 102
 103         rcu_read_lock();
 104         if (netif_is_bridge_port(dev)) {
 105                 p = br_port_get_rcu(dev);
 106                 vg = nbp_vlan_group_rcu(p);
 107         } else if (dev->priv_flags & IFF_EBRIDGE) {
 108                 br = netdev_priv(dev);
 109                 vg = br_vlan_group_rcu(br);
 110         }
 111         num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
 112         rcu_read_unlock();
 113
 114         if (p && (p->flags & BR_VLAN_TUNNEL))
 115                 vinfo_sz += br_get_vlan_tunnel_info_size(vg);
 116
 117         /* Each VLAN is returned in bridge_vlan_info along with flags */
 118         vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
 119
 120         if (!(filter_mask & RTEXT_FILTER_CFM_STATUS))
 121                 return vinfo_sz;
 122
 123         if (!br)
 124                 return vinfo_sz;
 125
 126         /* CFM status info must be added */
 127         br_cfm_mep_count(br, &num_cfm_mep_infos);
 128         br_cfm_peer_mep_count(br, &num_cfm_peer_mep_infos);
 129
 130         vinfo_sz += nla_total_size(0);  /* IFLA_BRIDGE_CFM */
 131         /* For each status struct the MEP instance (u32) is added */
 132         /* MEP instance (u32) + br_cfm_mep_status */
 133         vinfo_sz += num_cfm_mep_infos *
 134                      /*IFLA_BRIDGE_CFM_MEP_STATUS_INSTANCE */
 135                     (nla_total_size(sizeof(u32))
 136                      /* IFLA_BRIDGE_CFM_MEP_STATUS_OPCODE_UNEXP_SEEN */
 137                      + nla_total_size(sizeof(u32))
 138                      /* IFLA_BRIDGE_CFM_MEP_STATUS_VERSION_UNEXP_SEEN */
 139                      + nla_total_size(sizeof(u32))
 140                      /* IFLA_BRIDGE_CFM_MEP_STATUS_RX_LEVEL_LOW_SEEN */
 141                      + nla_total_size(sizeof(u32)));
 142         /* MEP instance (u32) + br_cfm_cc_peer_status */
 143         vinfo_sz += num_cfm_peer_mep_infos *
 144                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_INSTANCE */
 145                     (nla_total_size(sizeof(u32))
 146                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_PEER_MEPID */
 147                      + nla_total_size(sizeof(u32))
 148                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_CCM_DEFECT */
 149                      + nla_total_size(sizeof(u32))
 150                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_RDI */
 151                      + nla_total_size(sizeof(u32))
 152                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_PORT_TLV_VALUE */
 153                      + nla_total_size(sizeof(u8))
 154                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_IF_TLV_VALUE */
 155                      + nla_total_size(sizeof(u8))
 156                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEEN */
 157                      + nla_total_size(sizeof(u32))
 158                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_TLV_SEEN */
 159                      + nla_total_size(sizeof(u32))
 160                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEQ_UNEXP_SEEN */
 161                      + nla_total_size(sizeof(u32)));
 162
 163         return vinfo_sz;
 164 }
 165
 166 static inline size_t br_port_info_size(void)
 167 {
 168         return nla_total_size(1)        /* IFLA_BRPORT_STATE  */
 169                 + nla_total_size(2)     /* IFLA_BRPORT_PRIORITY */
 170                 + nla_total_size(4)     /* IFLA_BRPORT_COST */
 171                 + nla_total_size(1)     /* IFLA_BRPORT_MODE */
 172                 + nla_total_size(1)     /* IFLA_BRPORT_GUARD */
 173                 + nla_total_size(1)     /* IFLA_BRPORT_PROTECT */
 174                 + nla_total_size(1)     /* IFLA_BRPORT_FAST_LEAVE */
 175                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_TO_UCAST */
 176                 + nla_total_size(1)     /* IFLA_BRPORT_LEARNING */
 177                 + nla_total_size(1)     /* IFLA_BRPORT_UNICAST_FLOOD */
 178                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_FLOOD */
 179                 + nla_total_size(1)     /* IFLA_BRPORT_BCAST_FLOOD */
 180                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP */
 181                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP_WIFI */
 182                 + nla_total_size(1)     /* IFLA_BRPORT_VLAN_TUNNEL */
 183                 + nla_total_size(1)     /* IFLA_BRPORT_NEIGH_SUPPRESS */
 184                 + nla_total_size(1)     /* IFLA_BRPORT_ISOLATED */
 185                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
 186                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
 187                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_PORT */
 188                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_COST */
 189                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_ID */
 190                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_NO */
 191                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
 192                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_CONFIG_PENDING */
 193                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
 194                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
 195                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
 196 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 197                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MULTICAST_ROUTER */
 198 #endif
 199                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_GROUP_FWD_MASK */
 200                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MRP_RING_OPEN */
 201                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MRP_IN_OPEN */
 202                 + 0;
 203 }
 204
 205 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
 206 {
 207         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
 208                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
 209                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
 210                 + nla_total_size(4) /* IFLA_MASTER */
 211                 + nla_total_size(4) /* IFLA_MTU */
 212                 + nla_total_size(4) /* IFLA_LINK */
 213                 + nla_total_size(1) /* IFLA_OPERSTATE */
 214                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
 215                 + nla_total_size(br_get_link_af_size_filtered(dev,
 216                                  filter_mask)) /* IFLA_AF_SPEC */
 217                 + nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */
 218 }
 219
 220 static int br_port_fill_attrs(struct sk_buff *skb,
 221                               const struct net_bridge_port *p)
 222 {
 223         u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
 224         struct net_bridge_port *backup_p;
 225         u64 timerval;
 226
 227         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
 228             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
 229             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
 230             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
 231             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
 232             nla_put_u8(skb, IFLA_BRPORT_PROTECT,
 233                        !!(p->flags & BR_ROOT_BLOCK)) ||
 234             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
 235                        !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
 236             nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
 237                        !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
 238             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
 239             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
 240                        !!(p->flags & BR_FLOOD)) ||
 241             nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
 242                        !!(p->flags & BR_MCAST_FLOOD)) ||
 243             nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
 244                        !!(p->flags & BR_BCAST_FLOOD)) ||
 245             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
 246             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
 247                        !!(p->flags & BR_PROXYARP_WIFI)) ||
 248             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
 249                     &p->designated_root) ||
 250             nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
 251                     &p->designated_bridge) ||
 252             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
 253             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
 254             nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
 255             nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
 256             nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
 257                        p->topology_change_ack) ||
 258             nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
 259             nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
 260                                                         BR_VLAN_TUNNEL)) ||
 261             nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
 262             nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
 263                        !!(p->flags & BR_NEIGH_SUPPRESS)) ||
 264             nla_put_u8(skb, IFLA_BRPORT_MRP_RING_OPEN, !!(p->flags &
 265                                                           BR_MRP_LOST_CONT)) ||
 266             nla_put_u8(skb, IFLA_BRPORT_MRP_IN_OPEN,
 267                        !!(p->flags & BR_MRP_LOST_IN_CONT)) ||
 268             nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)))
 269                 return -EMSGSIZE;
 270
 271         timerval = br_timer_value(&p->message_age_timer);
 272         if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
 273                               IFLA_BRPORT_PAD))
 274                 return -EMSGSIZE;
 275         timerval = br_timer_value(&p->forward_delay_timer);
 276         if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
 277                               IFLA_BRPORT_PAD))
 278                 return -EMSGSIZE;
 279         timerval = br_timer_value(&p->hold_timer);
 280         if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
 281                               IFLA_BRPORT_PAD))
 282                 return -EMSGSIZE;
 283
 284 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 285         if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
 286                        p->multicast_router))
 287                 return -EMSGSIZE;
 288 #endif
 289
 290         /* we might be called only with br->lock */
 291         rcu_read_lock();
 292         backup_p = rcu_dereference(p->backup_port);
 293         if (backup_p)
 294                 nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT,
 295                             backup_p->dev->ifindex);
 296         rcu_read_unlock();
 297
 298         return 0;
 299 }
 300
 301 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
 302                                     u16 vid_end, u16 flags)
 303 {
 304         struct  bridge_vlan_info vinfo;
 305
 306         if ((vid_end - vid_start) > 0) {
 307                 /* add range to skb */
 308                 vinfo.vid = vid_start;
 309                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
 310                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 311                             sizeof(vinfo), &vinfo))
 312                         goto nla_put_failure;
 313
 314                 vinfo.vid = vid_end;
 315                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
 316                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 317                             sizeof(vinfo), &vinfo))
 318                         goto nla_put_failure;
 319         } else {
 320                 vinfo.vid = vid_start;
 321                 vinfo.flags = flags;
 322                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 323                             sizeof(vinfo), &vinfo))
 324                         goto nla_put_failure;
 325         }
 326
 327         return 0;
 328
 329 nla_put_failure:
 330         return -EMSGSIZE;
 331 }
 332
 333 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
 334                                          struct net_bridge_vlan_group *vg)
 335 {
 336         struct net_bridge_vlan *v;
 337         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 338         u16 flags, pvid;
 339         int err = 0;
 340
 341         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
 342          * and mark vlan info with begin and end flags
 343          * if vlaninfo represents a range
 344          */
 345         pvid = br_get_pvid(vg);
 346         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 347                 flags = 0;
 348                 if (!br_vlan_should_use(v))
 349                         continue;
 350                 if (v->vid == pvid)
 351                         flags |= BRIDGE_VLAN_INFO_PVID;
 352
 353                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 354                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 355
 356                 if (vid_range_start == 0) {
 357                         goto initvars;
 358                 } else if ((v->vid - vid_range_end) == 1 &&
 359                         flags == vid_range_flags) {
 360                         vid_range_end = v->vid;
 361                         continue;
 362                 } else {
 363                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 364                                                        vid_range_end,
 365                                                        vid_range_flags);
 366                         if (err)
 367                                 return err;
 368                 }
 369
 370 initvars:
 371                 vid_range_start = v->vid;
 372                 vid_range_end = v->vid;
 373                 vid_range_flags = flags;
 374         }
 375
 376         if (vid_range_start != 0) {
 377                 /* Call it once more to send any left over vlans */
 378                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 379                                                vid_range_end,
 380                                                vid_range_flags);
 381                 if (err)
 382                         return err;
 383         }
 384
 385         return 0;
 386 }
 387
 388 static int br_fill_ifvlaninfo(struct sk_buff *skb,
 389                               struct net_bridge_vlan_group *vg)
 390 {
 391         struct bridge_vlan_info vinfo;
 392         struct net_bridge_vlan *v;
 393         u16 pvid;
 394
 395         pvid = br_get_pvid(vg);
 396         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 397                 if (!br_vlan_should_use(v))
 398                         continue;
 399
 400                 vinfo.vid = v->vid;
 401                 vinfo.flags = 0;
 402                 if (v->vid == pvid)
 403                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
 404
 405                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 406                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 407
 408                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 409                             sizeof(vinfo), &vinfo))
 410                         goto nla_put_failure;
 411         }
 412
 413         return 0;
 414
 415 nla_put_failure:
 416         return -EMSGSIZE;
 417 }
 418
 419 /*
 420  * Create one netlink message for one interface
 421  * Contains port and master info as well as carrier and bridge state.
 422  */
 423 static int br_fill_ifinfo(struct sk_buff *skb,
 424                           const struct net_bridge_port *port,
 425                           u32 pid, u32 seq, int event, unsigned int flags,
 426                           u32 filter_mask, const struct net_device *dev,
 427                           bool getlink)
 428 {
 429         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
 430         struct nlattr *af = NULL;
 431         struct net_bridge *br;
 432         struct ifinfomsg *hdr;
 433         struct nlmsghdr *nlh;
 434
 435         if (port)
 436                 br = port->br;
 437         else
 438                 br = netdev_priv(dev);
 439
 440         br_debug(br, "br_fill_info event %d port %s master %s\n",
 441                      event, dev->name, br->dev->name);
 442
 443         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
 444         if (nlh == NULL)
 445                 return -EMSGSIZE;
 446
 447         hdr = nlmsg_data(nlh);
 448         hdr->ifi_family = AF_BRIDGE;
 449         hdr->__ifi_pad = 0;
 450         hdr->ifi_type = dev->type;
 451         hdr->ifi_index = dev->ifindex;
 452         hdr->ifi_flags = dev_get_flags(dev);
 453         hdr->ifi_change = 0;
 454
 455         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
 456             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
 457             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
 458             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
 459             (dev->addr_len &&
 460              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
 461             (dev->ifindex != dev_get_iflink(dev) &&
 462              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
 463                 goto nla_put_failure;
 464
 465         if (event == RTM_NEWLINK && port) {
 466                 struct nlattr *nest;
 467
 468                 nest = nla_nest_start(skb, IFLA_PROTINFO);
 469                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 470                         goto nla_put_failure;
 471                 nla_nest_end(skb, nest);
 472         }
 473
 474         if (filter_mask & (RTEXT_FILTER_BRVLAN |
 475                            RTEXT_FILTER_BRVLAN_COMPRESSED |
 476                            RTEXT_FILTER_MRP |
 477                            RTEXT_FILTER_CFM_CONFIG |
 478                            RTEXT_FILTER_CFM_STATUS)) {
 479                 af = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
 480                 if (!af)
 481                         goto nla_put_failure;
 482         }
 483
 484         /* Check if  the VID information is requested */
 485         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
 486             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
 487                 struct net_bridge_vlan_group *vg;
 488                 int err;
 489
 490                 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
 491                 rcu_read_lock();
 492                 if (port)
 493                         vg = nbp_vlan_group_rcu(port);
 494                 else
 495                         vg = br_vlan_group_rcu(br);
 496
 497                 if (!vg || !vg->num_vlans) {
 498                         rcu_read_unlock();
 499                         goto done;
 500                 }
 501                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 502                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 503                 else
 504                         err = br_fill_ifvlaninfo(skb, vg);
 505
 506                 if (port && (port->flags & BR_VLAN_TUNNEL))
 507                         err = br_fill_vlan_tunnel_info(skb, vg);
 508                 rcu_read_unlock();
 509                 if (err)
 510                         goto nla_put_failure;
 511         }
 512
 513         if (filter_mask & RTEXT_FILTER_MRP) {
 514                 int err;
 515
 516                 if (!br_mrp_enabled(br) || port)
 517                         goto done;
 518
 519                 rcu_read_lock();
 520                 err = br_mrp_fill_info(skb, br);
 521                 rcu_read_unlock();
 522
 523                 if (err)
 524                         goto nla_put_failure;
 525         }
 526
 527         if (filter_mask & (RTEXT_FILTER_CFM_CONFIG | RTEXT_FILTER_CFM_STATUS)) {
 528                 struct nlattr *cfm_nest = NULL;
 529                 int err;
 530
 531                 if (!br_cfm_created(br) || port)
 532                         goto done;
 533
 534                 cfm_nest = nla_nest_start(skb, IFLA_BRIDGE_CFM);
 535                 if (!cfm_nest)
 536                         goto nla_put_failure;
 537
 538                 if (filter_mask & RTEXT_FILTER_CFM_CONFIG) {
 539                         rcu_read_lock();
 540                         err = br_cfm_config_fill_info(skb, br);
 541                         rcu_read_unlock();
 542                         if (err)
 543                                 goto nla_put_failure;
 544                 }
 545
 546                 if (filter_mask & RTEXT_FILTER_CFM_STATUS) {
 547                         rcu_read_lock();
 548                         err = br_cfm_status_fill_info(skb, br, getlink);
 549                         rcu_read_unlock();
 550                         if (err)
 551                                 goto nla_put_failure;
 552                 }
 553
 554                 nla_nest_end(skb, cfm_nest);
 555         }
 556
 557 done:
 558         if (af)
 559                 nla_nest_end(skb, af);
 560         nlmsg_end(skb, nlh);
 561         return 0;
 562
 563 nla_put_failure:
 564         nlmsg_cancel(skb, nlh);
 565         return -EMSGSIZE;
 566 }
 567
 568 void br_info_notify(int event, const struct net_bridge *br,
 569                     const struct net_bridge_port *port, u32 filter)
 570 {
 571         struct net_device *dev;
 572         struct sk_buff *skb;
 573         int err = -ENOBUFS;
 574         struct net *net;
 575         u16 port_no = 0;
 576
 577         if (WARN_ON(!port && !br))
 578                 return;
 579
 580         if (port) {
 581                 dev = port->dev;
 582                 br = port->br;
 583                 port_no = port->port_no;
 584         } else {
 585                 dev = br->dev;
 586         }
 587
 588         net = dev_net(dev);
 589         br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
 590
 591         skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
 592         if (skb == NULL)
 593                 goto errout;
 594
 595         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev, false);
 596         if (err < 0) {
 597                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 598                 WARN_ON(err == -EMSGSIZE);
 599                 kfree_skb(skb);
 600                 goto errout;
 601         }
 602         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 603         return;
 604 errout:
 605         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 606 }
 607
 608 /* Notify listeners of a change in bridge or port information */
 609 void br_ifinfo_notify(int event, const struct net_bridge *br,
 610                       const struct net_bridge_port *port)
 611 {
 612         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 613
 614         return br_info_notify(event, br, port, filter);
 615 }
 616
 617 /*
 618  * Dump information about all ports, in response to GETLINK
 619  */
 620 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 621                struct net_device *dev, u32 filter_mask, int nlflags)
 622 {
 623         struct net_bridge_port *port = br_port_get_rtnl(dev);
 624
 625         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 626             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) &&
 627             !(filter_mask & RTEXT_FILTER_MRP) &&
 628             !(filter_mask & RTEXT_FILTER_CFM_CONFIG) &&
 629             !(filter_mask & RTEXT_FILTER_CFM_STATUS))
 630                 return 0;
 631
 632         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 633                               filter_mask, dev, true);
 634 }
 635
 636 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 637                         int cmd, struct bridge_vlan_info *vinfo, bool *changed,
 638                         struct netlink_ext_ack *extack)
 639 {
 640         bool curr_change;
 641         int err = 0;
 642
 643         switch (cmd) {
 644         case RTM_SETLINK:
 645                 if (p) {
 646                         /* if the MASTER flag is set this will act on the global
 647                          * per-VLAN entry as well
 648                          */
 649                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
 650                                            &curr_change, extack);
 651                 } else {
 652                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 653                         err = br_vlan_add(br, vinfo->vid, vinfo->flags,
 654                                           &curr_change, extack);
 655                 }
 656                 if (curr_change)
 657                         *changed = true;
 658                 break;
 659
 660         case RTM_DELLINK:
 661                 if (p) {
 662                         if (!nbp_vlan_delete(p, vinfo->vid))
 663                                 *changed = true;
 664
 665                         if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
 666                             !br_vlan_delete(p->br, vinfo->vid))
 667                                 *changed = true;
 668                 } else if (!br_vlan_delete(br, vinfo->vid)) {
 669                         *changed = true;
 670                 }
 671                 break;
 672         }
 673
 674         return err;
 675 }
 676
 677 int br_process_vlan_info(struct net_bridge *br,
 678                          struct net_bridge_port *p, int cmd,
 679                          struct bridge_vlan_info *vinfo_curr,
 680                          struct bridge_vlan_info **vinfo_last,
 681                          bool *changed,
 682                          struct netlink_ext_ack *extack)
 683 {
 684         int err, rtm_cmd;
 685
 686         if (!br_vlan_valid_id(vinfo_curr->vid, extack))
 687                 return -EINVAL;
 688
 689         /* needed for vlan-only NEWVLAN/DELVLAN notifications */
 690         rtm_cmd = br_afspec_cmd_to_rtm(cmd);
 691
 692         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 693                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 694                         return -EINVAL;
 695                 *vinfo_last = vinfo_curr;
 696                 return 0;
 697         }
 698
 699         if (*vinfo_last) {
 700                 struct bridge_vlan_info tmp_vinfo;
 701                 int v, v_change_start = 0;
 702
 703                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 704                         return -EINVAL;
 705
 706                 memcpy(&tmp_vinfo, *vinfo_last,
 707                        sizeof(struct bridge_vlan_info));
 708                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
 709                         bool curr_change = false;
 710
 711                         tmp_vinfo.vid = v;
 712                         err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change,
 713                                            extack);
 714                         if (err)
 715                                 break;
 716                         if (curr_change) {
 717                                 *changed = curr_change;
 718                                 if (!v_change_start)
 719                                         v_change_start = v;
 720                         } else {
 721                                 /* nothing to notify yet */
 722                                 if (!v_change_start)
 723                                         continue;
 724                                 br_vlan_notify(br, p, v_change_start,
 725                                                v - 1, rtm_cmd);
 726                                 v_change_start = 0;
 727                         }
 728                         cond_resched();
 729                 }
 730                 /* v_change_start is set only if the last/whole range changed */
 731                 if (v_change_start)
 732                         br_vlan_notify(br, p, v_change_start,
 733                                        v - 1, rtm_cmd);
 734
 735                 *vinfo_last = NULL;
 736
 737                 return err;
 738         }
 739
 740         err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
 741         if (*changed)
 742                 br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd);
 743
 744         return err;
 745 }
 746
 747 static int br_afspec(struct net_bridge *br,
 748                      struct net_bridge_port *p,
 749                      struct nlattr *af_spec,
 750                      int cmd, bool *changed,
 751                      struct netlink_ext_ack *extack)
 752 {
 753         struct bridge_vlan_info *vinfo_curr = NULL;
 754         struct bridge_vlan_info *vinfo_last = NULL;
 755         struct nlattr *attr;
 756         struct vtunnel_info tinfo_last = {};
 757         struct vtunnel_info tinfo_curr = {};
 758         int err = 0, rem;
 759
 760         nla_for_each_nested(attr, af_spec, rem) {
 761                 err = 0;
 762                 switch (nla_type(attr)) {
 763                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
 764                         if (!p || !(p->flags & BR_VLAN_TUNNEL))
 765                                 return -EINVAL;
 766                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
 767                         if (err)
 768                                 return err;
 769                         err = br_process_vlan_tunnel_info(br, p, cmd,
 770                                                           &tinfo_curr,
 771                                                           &tinfo_last,
 772                                                           changed);
 773                         if (err)
 774                                 return err;
 775                         break;
 776                 case IFLA_BRIDGE_VLAN_INFO:
 777                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 778                                 return -EINVAL;
 779                         vinfo_curr = nla_data(attr);
 780                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
 781                                                    &vinfo_last, changed,
 782                                                    extack);
 783                         if (err)
 784                                 return err;
 785                         break;
 786                 case IFLA_BRIDGE_MRP:
 787                         err = br_mrp_parse(br, p, attr, cmd, extack);
 788                         if (err)
 789                                 return err;
 790                         break;
 791                 case IFLA_BRIDGE_CFM:
 792                         err = br_cfm_parse(br, p, attr, cmd, extack);
 793                         if (err)
 794                                 return err;
 795                         break;
 796                 }
 797         }
 798
 799         return err;
 800 }
 801
 802 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 803         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 804         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 805         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 806         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 807         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 808         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 809         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 810         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 811         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 812         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 813         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 814         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 815         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
 816         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
 817         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
 818         [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
 819         [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
 820         [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
 821         [IFLA_BRPORT_ISOLATED]  = { .type = NLA_U8 },
 822         [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
 823 };
 824
 825 /* Change the state of the port and notify spanning tree */
 826 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 827 {
 828         if (state > BR_STATE_BLOCKING)
 829                 return -EINVAL;
 830
 831         /* if kernel STP is running, don't allow changes */
 832         if (p->br->stp_enabled == BR_KERNEL_STP)
 833                 return -EBUSY;
 834
 835         /* if device is not up, change is not allowed
 836          * if link is not present, only allowable state is disabled
 837          */
 838         if (!netif_running(p->dev) ||
 839             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 840                 return -ENETDOWN;
 841
 842         br_set_state(p, state);
 843         br_port_state_selection(p->br);
 844         return 0;
 845 }
 846
 847 /* Set/clear or port flags based on attribute */
 848 static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 849                             int attrtype, unsigned long mask)
 850 {
 851         unsigned long flags;
 852         int err;
 853
 854         if (!tb[attrtype])
 855                 return 0;
 856
 857         if (nla_get_u8(tb[attrtype]))
 858                 flags = p->flags | mask;
 859         else
 860                 flags = p->flags & ~mask;
 861
 862         err = br_switchdev_set_port_flag(p, flags, mask);
 863         if (err)
 864                 return err;
 865
 866         p->flags = flags;
 867         return 0;
 868 }
 869
 870 /* Process bridge protocol info on port */
 871 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
 872 {
 873         unsigned long old_flags = p->flags;
 874         bool br_vlan_tunnel_old = false;
 875         int err;
 876
 877         err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 878         if (err)
 879                 return err;
 880
 881         err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 882         if (err)
 883                 return err;
 884
 885         err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
 886         if (err)
 887                 return err;
 888
 889         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 890         if (err)
 891                 return err;
 892
 893         err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 894         if (err)
 895                 return err;
 896
 897         err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 898         if (err)
 899                 return err;
 900
 901         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
 902         if (err)
 903                 return err;
 904
 905         err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
 906         if (err)
 907                 return err;
 908
 909         err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
 910         if (err)
 911                 return err;
 912
 913         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 914         if (err)
 915                 return err;
 916
 917         err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 918         if (err)
 919                 return err;
 920
 921         br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
 922         err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
 923         if (err)
 924                 return err;
 925
 926         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
 927                 nbp_vlan_tunnel_info_flush(p);
 928
 929         if (tb[IFLA_BRPORT_COST]) {
 930                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 931                 if (err)
 932                         return err;
 933         }
 934
 935         if (tb[IFLA_BRPORT_PRIORITY]) {
 936                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 937                 if (err)
 938                         return err;
 939         }
 940
 941         if (tb[IFLA_BRPORT_STATE]) {
 942                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 943                 if (err)
 944                         return err;
 945         }
 946
 947         if (tb[IFLA_BRPORT_FLUSH])
 948                 br_fdb_delete_by_port(p->br, p, 0, 0);
 949
 950 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 951         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 952                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 953
 954                 err = br_multicast_set_port_router(p, mcast_router);
 955                 if (err)
 956                         return err;
 957         }
 958 #endif
 959
 960         if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
 961                 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
 962
 963                 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
 964                         return -EINVAL;
 965                 p->group_fwd_mask = fwd_mask;
 966         }
 967
 968         err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
 969                                BR_NEIGH_SUPPRESS);
 970         if (err)
 971                 return err;
 972
 973         err = br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
 974         if (err)
 975                 return err;
 976
 977         if (tb[IFLA_BRPORT_BACKUP_PORT]) {
 978                 struct net_device *backup_dev = NULL;
 979                 u32 backup_ifindex;
 980
 981                 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
 982                 if (backup_ifindex) {
 983                         backup_dev = __dev_get_by_index(dev_net(p->dev),
 984                                                         backup_ifindex);
 985                         if (!backup_dev)
 986                                 return -ENOENT;
 987                 }
 988
 989                 err = nbp_backup_change(p, backup_dev);
 990                 if (err)
 991                         return err;
 992         }
 993
 994         br_port_flags_change(p, old_flags ^ p->flags);
 995         return 0;
 996 }
 997
 998 /* Change state and parameters on port. */
 999 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags,
1000                struct netlink_ext_ack *extack)
1001 {
1002         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
1003         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
1004         struct net_bridge_port *p;
1005         struct nlattr *protinfo;
1006         struct nlattr *afspec;
1007         bool changed = false;
1008         int err = 0;
1009
1010         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
1011         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
1012         if (!protinfo && !afspec)
1013                 return 0;
1014
1015         p = br_port_get_rtnl(dev);
1016         /* We want to accept dev as bridge itself if the AF_SPEC
1017          * is set to see if someone is setting vlan info on the bridge
1018          */
1019         if (!p && !afspec)
1020                 return -EINVAL;
1021
1022         if (p && protinfo) {
1023                 if (protinfo->nla_type & NLA_F_NESTED) {
1024                         err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX,
1025                                                           protinfo,
1026                                                           br_port_policy,
1027                                                           NULL);
1028                         if (err)
1029                                 return err;
1030
1031                         spin_lock_bh(&p->br->lock);
1032                         err = br_setport(p, tb);
1033                         spin_unlock_bh(&p->br->lock);
1034                 } else {
1035                         /* Binary compatibility with old RSTP */
1036                         if (nla_len(protinfo) < sizeof(u8))
1037                                 return -EINVAL;
1038
1039                         spin_lock_bh(&p->br->lock);
1040                         err = br_set_port_state(p, nla_get_u8(protinfo));
1041                         spin_unlock_bh(&p->br->lock);
1042                 }
1043                 if (err)
1044                         goto out;
1045                 changed = true;
1046         }
1047
1048         if (afspec)
1049                 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
1050
1051         if (changed)
1052                 br_ifinfo_notify(RTM_NEWLINK, br, p);
1053 out:
1054         return err;
1055 }
1056
1057 /* Delete port information */
1058 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
1059 {
1060         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
1061         struct net_bridge_port *p;
1062         struct nlattr *afspec;
1063         bool changed = false;
1064         int err = 0;
1065
1066         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
1067         if (!afspec)
1068                 return 0;
1069
1070         p = br_port_get_rtnl(dev);
1071         /* We want to accept dev as bridge itself as well */
1072         if (!p && !(dev->priv_flags & IFF_EBRIDGE))
1073                 return -EINVAL;
1074
1075         err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL);
1076         if (changed)
1077                 /* Send RTM_NEWLINK because userspace
1078                  * expects RTM_NEWLINK for vlan dels
1079                  */
1080                 br_ifinfo_notify(RTM_NEWLINK, br, p);
1081
1082         return err;
1083 }
1084
1085 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
1086                        struct netlink_ext_ack *extack)
1087 {
1088         if (tb[IFLA_ADDRESS]) {
1089                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1090                         return -EINVAL;
1091                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1092                         return -EADDRNOTAVAIL;
1093         }
1094
1095         if (!data)
1096                 return 0;
1097
1098 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1099         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1100                 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
1101                 case htons(ETH_P_8021Q):
1102                 case htons(ETH_P_8021AD):
1103                         break;
1104                 default:
1105                         return -EPROTONOSUPPORT;
1106                 }
1107         }
1108
1109         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1110                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1111
1112                 if (defpvid >= VLAN_VID_MASK)
1113                         return -EINVAL;
1114         }
1115 #endif
1116
1117         return 0;
1118 }
1119
1120 static int br_port_slave_changelink(struct net_device *brdev,
1121                                     struct net_device *dev,
1122                                     struct nlattr *tb[],
1123                                     struct nlattr *data[],
1124                                     struct netlink_ext_ack *extack)
1125 {
1126         struct net_bridge *br = netdev_priv(brdev);
1127         int ret;
1128
1129         if (!data)
1130                 return 0;
1131
1132         spin_lock_bh(&br->lock);
1133         ret = br_setport(br_port_get_rtnl(dev), data);
1134         spin_unlock_bh(&br->lock);
1135
1136         return ret;
1137 }
1138
1139 static int br_port_fill_slave_info(struct sk_buff *skb,
1140                                    const struct net_device *brdev,
1141                                    const struct net_device *dev)
1142 {
1143         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
1144 }
1145
1146 static size_t br_port_get_slave_size(const struct net_device *brdev,
1147                                      const struct net_device *dev)
1148 {
1149         return br_port_info_size();
1150 }
1151
1152 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1153         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1154         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
1155         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
1156         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1157         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1158         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1159         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1160         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1161         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1162         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1163                                  .len  = ETH_ALEN },
1164         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1165         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1166         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1167         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1168         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1169         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1170         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1171         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1172         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1173         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1174         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1175         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1176         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1177         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1178         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1179         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1180         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1181         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1182         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1183         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1184         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1185         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1186         [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1187         [IFLA_BR_MULTI_BOOLOPT] =
1188                 NLA_POLICY_EXACT_LEN(sizeof(struct br_boolopt_multi)),
1189 };
1190
1191 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1192                          struct nlattr *data[],
1193                          struct netlink_ext_ack *extack)
1194 {
1195         struct net_bridge *br = netdev_priv(brdev);
1196         int err;
1197
1198         if (!data)
1199                 return 0;
1200
1201         if (data[IFLA_BR_FORWARD_DELAY]) {
1202                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1203                 if (err)
1204                         return err;
1205         }
1206
1207         if (data[IFLA_BR_HELLO_TIME]) {
1208                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1209                 if (err)
1210                         return err;
1211         }
1212
1213         if (data[IFLA_BR_MAX_AGE]) {
1214                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1215                 if (err)
1216                         return err;
1217         }
1218
1219         if (data[IFLA_BR_AGEING_TIME]) {
1220                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1221                 if (err)
1222                         return err;
1223         }
1224
1225         if (data[IFLA_BR_STP_STATE]) {
1226                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1227
1228                 err = br_stp_set_enabled(br, stp_enabled, extack);
1229                 if (err)
1230                         return err;
1231         }
1232
1233         if (data[IFLA_BR_PRIORITY]) {
1234                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1235
1236                 br_stp_set_bridge_priority(br, priority);
1237         }
1238
1239         if (data[IFLA_BR_VLAN_FILTERING]) {
1240                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1241
1242                 err = __br_vlan_filter_toggle(br, vlan_filter);
1243                 if (err)
1244                         return err;
1245         }
1246
1247 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1248         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1249                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1250
1251                 err = __br_vlan_set_proto(br, vlan_proto);
1252                 if (err)
1253                         return err;
1254         }
1255
1256         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1257                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1258
1259                 err = __br_vlan_set_default_pvid(br, defpvid, extack);
1260                 if (err)
1261                         return err;
1262         }
1263
1264         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1265                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1266
1267                 err = br_vlan_set_stats(br, vlan_stats);
1268                 if (err)
1269                         return err;
1270         }
1271
1272         if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1273                 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1274
1275                 err = br_vlan_set_stats_per_port(br, per_port);
1276                 if (err)
1277                         return err;
1278         }
1279 #endif
1280
1281         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1282                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1283
1284                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1285                         return -EINVAL;
1286                 br->group_fwd_mask = fwd_mask;
1287         }
1288
1289         if (data[IFLA_BR_GROUP_ADDR]) {
1290                 u8 new_addr[ETH_ALEN];
1291
1292                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1293                         return -EINVAL;
1294                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1295                 if (!is_link_local_ether_addr(new_addr))
1296                         return -EINVAL;
1297                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1298                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1299                     new_addr[5] == 3)           /* 802.1X PAE address */
1300                         return -EINVAL;
1301                 spin_lock_bh(&br->lock);
1302                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1303                 spin_unlock_bh(&br->lock);
1304                 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1305                 br_recalculate_fwd_mask(br);
1306         }
1307
1308         if (data[IFLA_BR_FDB_FLUSH])
1309                 br_fdb_flush(br);
1310
1311 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1312         if (data[IFLA_BR_MCAST_ROUTER]) {
1313                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1314
1315                 err = br_multicast_set_router(br, multicast_router);
1316                 if (err)
1317                         return err;
1318         }
1319
1320         if (data[IFLA_BR_MCAST_SNOOPING]) {
1321                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1322
1323                 br_multicast_toggle(br, mcast_snooping);
1324         }
1325
1326         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1327                 u8 val;
1328
1329                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1330                 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1331         }
1332
1333         if (data[IFLA_BR_MCAST_QUERIER]) {
1334                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1335
1336                 err = br_multicast_set_querier(br, mcast_querier);
1337                 if (err)
1338                         return err;
1339         }
1340
1341         if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
1342                 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
1343                         RHT_ELASTICITY);
1344
1345         if (data[IFLA_BR_MCAST_HASH_MAX])
1346                 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1347
1348         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1349                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1350
1351                 br->multicast_last_member_count = val;
1352         }
1353
1354         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1355                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1356
1357                 br->multicast_startup_query_count = val;
1358         }
1359
1360         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1361                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1362
1363                 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1364         }
1365
1366         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1367                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1368
1369                 br->multicast_membership_interval = clock_t_to_jiffies(val);
1370         }
1371
1372         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1373                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1374
1375                 br->multicast_querier_interval = clock_t_to_jiffies(val);
1376         }
1377
1378         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1379                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1380
1381                 br->multicast_query_interval = clock_t_to_jiffies(val);
1382         }
1383
1384         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1385                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1386
1387                 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1388         }
1389
1390         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1391                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1392
1393                 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1394         }
1395
1396         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1397                 __u8 mcast_stats;
1398
1399                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1400                 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1401         }
1402
1403         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1404                 __u8 igmp_version;
1405
1406                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1407                 err = br_multicast_set_igmp_version(br, igmp_version);
1408                 if (err)
1409                         return err;
1410         }
1411
1412 #if IS_ENABLED(CONFIG_IPV6)
1413         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1414                 __u8 mld_version;
1415
1416                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1417                 err = br_multicast_set_mld_version(br, mld_version);
1418                 if (err)
1419                         return err;
1420         }
1421 #endif
1422 #endif
1423 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1424         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1425                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1426
1427                 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1428         }
1429
1430         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1431                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1432
1433                 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1434         }
1435
1436         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1437                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1438
1439                 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1440         }
1441 #endif
1442
1443         if (data[IFLA_BR_MULTI_BOOLOPT]) {
1444                 struct br_boolopt_multi *bm;
1445
1446                 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
1447                 err = br_boolopt_multi_toggle(br, bm, extack);
1448                 if (err)
1449                         return err;
1450         }
1451
1452         return 0;
1453 }
1454
1455 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1456                           struct nlattr *tb[], struct nlattr *data[],
1457                           struct netlink_ext_ack *extack)
1458 {
1459         struct net_bridge *br = netdev_priv(dev);
1460         int err;
1461
1462         err = register_netdevice(dev);
1463         if (err)
1464                 return err;
1465
1466         if (tb[IFLA_ADDRESS]) {
1467                 spin_lock_bh(&br->lock);
1468                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1469                 spin_unlock_bh(&br->lock);
1470         }
1471
1472         err = br_changelink(dev, tb, data, extack);
1473         if (err)
1474                 br_dev_delete(dev, NULL);
1475
1476         return err;
1477 }
1478
1479 static size_t br_get_size(const struct net_device *brdev)
1480 {
1481         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1482                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1483                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1484                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1485                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1486                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1487                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1488 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1489                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1490                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1491                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1492                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_PER_PORT */
1493 #endif
1494                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1495                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1496                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1497                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1498                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1499                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1500                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1501                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1502                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1503                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1504                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1505                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1506 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1507                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1508                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1509                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1510                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1511                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1512                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1513                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1514                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1515                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1516                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1517                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1518                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1519                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1520                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1521                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1522                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1523                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1524 #endif
1525 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1526                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1527                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1528                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1529 #endif
1530                nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
1531                0;
1532 }
1533
1534 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1535 {
1536         struct net_bridge *br = netdev_priv(brdev);
1537         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1538         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1539         u32 age_time = jiffies_to_clock_t(br->max_age);
1540         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1541         u32 stp_enabled = br->stp_enabled;
1542         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1543         u8 vlan_enabled = br_vlan_enabled(br->dev);
1544         struct br_boolopt_multi bm;
1545         u64 clockval;
1546
1547         clockval = br_timer_value(&br->hello_timer);
1548         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1549                 return -EMSGSIZE;
1550         clockval = br_timer_value(&br->tcn_timer);
1551         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1552                 return -EMSGSIZE;
1553         clockval = br_timer_value(&br->topology_change_timer);
1554         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1555                               IFLA_BR_PAD))
1556                 return -EMSGSIZE;
1557         clockval = br_timer_value(&br->gc_work.timer);
1558         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1559                 return -EMSGSIZE;
1560
1561         br_boolopt_multi_get(br, &bm);
1562         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1563             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1564             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1565             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1566             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1567             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1568             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1569             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1570             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1571                     &br->bridge_id) ||
1572             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1573                     &br->designated_root) ||
1574             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1575             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1576             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1577             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1578                        br->topology_change_detected) ||
1579             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
1580             nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
1581                 return -EMSGSIZE;
1582
1583 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1584         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1585             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1586             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1587                        br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1588             nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1589                        br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)))
1590                 return -EMSGSIZE;
1591 #endif
1592 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1593         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1594             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1595                        br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1596             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1597                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1598             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1599                        br_opt_get(br, BROPT_MULTICAST_QUERIER)) ||
1600             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1601                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1602             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
1603             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1604             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1605                         br->multicast_last_member_count) ||
1606             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1607                         br->multicast_startup_query_count) ||
1608             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1609                        br->multicast_igmp_version))
1610                 return -EMSGSIZE;
1611 #if IS_ENABLED(CONFIG_IPV6)
1612         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1613                        br->multicast_mld_version))
1614                 return -EMSGSIZE;
1615 #endif
1616         clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1617         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1618                               IFLA_BR_PAD))
1619                 return -EMSGSIZE;
1620         clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1621         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1622                               IFLA_BR_PAD))
1623                 return -EMSGSIZE;
1624         clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1625         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1626                               IFLA_BR_PAD))
1627                 return -EMSGSIZE;
1628         clockval = jiffies_to_clock_t(br->multicast_query_interval);
1629         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1630                               IFLA_BR_PAD))
1631                 return -EMSGSIZE;
1632         clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1633         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1634                               IFLA_BR_PAD))
1635                 return -EMSGSIZE;
1636         clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1637         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1638                               IFLA_BR_PAD))
1639                 return -EMSGSIZE;
1640 #endif
1641 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1642         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1643                        br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1644             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1645                        br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1646             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1647                        br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1648                 return -EMSGSIZE;
1649 #endif
1650
1651         return 0;
1652 }
1653
1654 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1655 {
1656         struct net_bridge_port *p = NULL;
1657         struct net_bridge_vlan_group *vg;
1658         struct net_bridge_vlan *v;
1659         struct net_bridge *br;
1660         int numvls = 0;
1661
1662         switch (attr) {
1663         case IFLA_STATS_LINK_XSTATS:
1664                 br = netdev_priv(dev);
1665                 vg = br_vlan_group(br);
1666                 break;
1667         case IFLA_STATS_LINK_XSTATS_SLAVE:
1668                 p = br_port_get_rtnl(dev);
1669                 if (!p)
1670                         return 0;
1671                 br = p->br;
1672                 vg = nbp_vlan_group(p);
1673                 break;
1674         default:
1675                 return 0;
1676         }
1677
1678         if (vg) {
1679                 /* we need to count all, even placeholder entries */
1680                 list_for_each_entry(v, &vg->vlan_list, vlist)
1681                         numvls++;
1682         }
1683
1684         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1685                nla_total_size(sizeof(struct br_mcast_stats)) +
1686                nla_total_size(0);
1687 }
1688
1689 static int br_fill_linkxstats(struct sk_buff *skb,
1690                               const struct net_device *dev,
1691                               int *prividx, int attr)
1692 {
1693         struct nlattr *nla __maybe_unused;
1694         struct net_bridge_port *p = NULL;
1695         struct net_bridge_vlan_group *vg;
1696         struct net_bridge_vlan *v;
1697         struct net_bridge *br;
1698         struct nlattr *nest;
1699         int vl_idx = 0;
1700
1701         switch (attr) {
1702         case IFLA_STATS_LINK_XSTATS:
1703                 br = netdev_priv(dev);
1704                 vg = br_vlan_group(br);
1705                 break;
1706         case IFLA_STATS_LINK_XSTATS_SLAVE:
1707                 p = br_port_get_rtnl(dev);
1708                 if (!p)
1709                         return 0;
1710                 br = p->br;
1711                 vg = nbp_vlan_group(p);
1712                 break;
1713         default:
1714                 return -EINVAL;
1715         }
1716
1717         nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE);
1718         if (!nest)
1719                 return -EMSGSIZE;
1720
1721         if (vg) {
1722                 u16 pvid;
1723
1724                 pvid = br_get_pvid(vg);
1725                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1726                         struct bridge_vlan_xstats vxi;
1727                         struct pcpu_sw_netstats stats;
1728
1729                         if (++vl_idx < *prividx)
1730                                 continue;
1731                         memset(&vxi, 0, sizeof(vxi));
1732                         vxi.vid = v->vid;
1733                         vxi.flags = v->flags;
1734                         if (v->vid == pvid)
1735                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1736                         br_vlan_get_stats(v, &stats);
1737                         vxi.rx_bytes = stats.rx_bytes;
1738                         vxi.rx_packets = stats.rx_packets;
1739                         vxi.tx_bytes = stats.tx_bytes;
1740                         vxi.tx_packets = stats.tx_packets;
1741
1742                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1743                                 goto nla_put_failure;
1744                 }
1745         }
1746
1747 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1748         if (++vl_idx >= *prividx) {
1749                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1750                                         sizeof(struct br_mcast_stats),
1751                                         BRIDGE_XSTATS_PAD);
1752                 if (!nla)
1753                         goto nla_put_failure;
1754                 br_multicast_get_stats(br, p, nla_data(nla));
1755         }
1756 #endif
1757
1758         if (p) {
1759                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP,
1760                                         sizeof(p->stp_xstats),
1761                                         BRIDGE_XSTATS_PAD);
1762                 if (!nla)
1763                         goto nla_put_failure;
1764
1765                 spin_lock_bh(&br->lock);
1766                 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats));
1767                 spin_unlock_bh(&br->lock);
1768         }
1769
1770         nla_nest_end(skb, nest);
1771         *prividx = 0;
1772
1773         return 0;
1774
1775 nla_put_failure:
1776         nla_nest_end(skb, nest);
1777         *prividx = vl_idx;
1778
1779         return -EMSGSIZE;
1780 }
1781
1782 static struct rtnl_af_ops br_af_ops __read_mostly = {
1783         .family                 = AF_BRIDGE,
1784         .get_link_af_size       = br_get_link_af_size_filtered,
1785 };
1786
1787 struct rtnl_link_ops br_link_ops __read_mostly = {
1788         .kind                   = "bridge",
1789         .priv_size              = sizeof(struct net_bridge),
1790         .setup                  = br_dev_setup,
1791         .maxtype                = IFLA_BR_MAX,
1792         .policy                 = br_policy,
1793         .validate               = br_validate,
1794         .newlink                = br_dev_newlink,
1795         .changelink             = br_changelink,
1796         .dellink                = br_dev_delete,
1797         .get_size               = br_get_size,
1798         .fill_info              = br_fill_info,
1799         .fill_linkxstats        = br_fill_linkxstats,
1800         .get_linkxstats_size    = br_get_linkxstats_size,
1801
1802         .slave_maxtype          = IFLA_BRPORT_MAX,
1803         .slave_policy           = br_port_policy,
1804         .slave_changelink       = br_port_slave_changelink,
1805         .get_slave_size         = br_port_get_slave_size,
1806         .fill_slave_info        = br_port_fill_slave_info,
1807 };
1808
1809 int __init br_netlink_init(void)
1810 {
1811         int err;
1812
1813         br_mdb_init();
1814         br_vlan_rtnl_init();
1815         rtnl_af_register(&br_af_ops);
1816
1817         err = rtnl_link_register(&br_link_ops);
1818         if (err)
1819                 goto out_af;
1820
1821         return 0;
1822
1823 out_af:
1824         rtnl_af_unregister(&br_af_ops);
1825         br_mdb_uninit();
1826         return err;
1827 }
1828
1829 void br_netlink_fini(void)
1830 {
1831         br_mdb_uninit();
1832         br_vlan_rtnl_uninit();
1833         rtnl_af_unregister(&br_af_ops);
1834         rtnl_link_unregister(&br_link_ops);
1835 }