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 #include "br_private_mcast_eht.h"
  22
  23 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  24                                 u32 filter_mask)
  25 {
  26         struct net_bridge_vlan *v;
  27         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
  28         u16 flags, pvid;
  29         int num_vlans = 0;
  30
  31         if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
  32                 return 0;
  33
  34         pvid = br_get_pvid(vg);
  35         /* Count number of vlan infos */
  36         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
  37                 flags = 0;
  38                 /* only a context, bridge vlan not activated */
  39                 if (!br_vlan_should_use(v))
  40                         continue;
  41                 if (v->vid == pvid)
  42                         flags |= BRIDGE_VLAN_INFO_PVID;
  43
  44                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
  45                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
  46
  47                 if (vid_range_start == 0) {
  48                         goto initvars;
  49                 } else if ((v->vid - vid_range_end) == 1 &&
  50                         flags == vid_range_flags) {
  51                         vid_range_end = v->vid;
  52                         continue;
  53                 } else {
  54                         if ((vid_range_end - vid_range_start) > 0)
  55                                 num_vlans += 2;
  56                         else
  57                                 num_vlans += 1;
  58                 }
  59 initvars:
  60                 vid_range_start = v->vid;
  61                 vid_range_end = v->vid;
  62                 vid_range_flags = flags;
  63         }
  64
  65         if (vid_range_start != 0) {
  66                 if ((vid_range_end - vid_range_start) > 0)
  67                         num_vlans += 2;
  68                 else
  69                         num_vlans += 1;
  70         }
  71
  72         return num_vlans;
  73 }
  74
  75 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
  76                                  u32 filter_mask)
  77 {
  78         int num_vlans;
  79
  80         if (!vg)
  81                 return 0;
  82
  83         if (filter_mask & RTEXT_FILTER_BRVLAN)
  84                 return vg->num_vlans;
  85
  86         rcu_read_lock();
  87         num_vlans = __get_num_vlan_infos(vg, filter_mask);
  88         rcu_read_unlock();
  89
  90         return num_vlans;
  91 }
  92
  93 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
  94                                            u32 filter_mask)
  95 {
  96         struct net_bridge_vlan_group *vg = NULL;
  97         struct net_bridge_port *p = NULL;
  98         struct net_bridge *br = NULL;
  99         u32 num_cfm_peer_mep_infos;
 100         u32 num_cfm_mep_infos;
 101         size_t vinfo_sz = 0;
 102         int num_vlan_infos;
 103
 104         rcu_read_lock();
 105         if (netif_is_bridge_port(dev)) {
 106                 p = br_port_get_check_rcu(dev);
 107                 if (p)
 108                         vg = nbp_vlan_group_rcu(p);
 109         } else if (netif_is_bridge_master(dev)) {
 110                 br = netdev_priv(dev);
 111                 vg = br_vlan_group_rcu(br);
 112         }
 113         num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
 114         rcu_read_unlock();
 115
 116         if (p && (p->flags & BR_VLAN_TUNNEL))
 117                 vinfo_sz += br_get_vlan_tunnel_info_size(vg);
 118
 119         /* Each VLAN is returned in bridge_vlan_info along with flags */
 120         vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
 121
 122         if (p && vg && (filter_mask & RTEXT_FILTER_MST))
 123                 vinfo_sz += br_mst_info_size(vg);
 124
 125         if (!(filter_mask & RTEXT_FILTER_CFM_STATUS))
 126                 return vinfo_sz;
 127
 128         if (!br)
 129                 return vinfo_sz;
 130
 131         /* CFM status info must be added */
 132         br_cfm_mep_count(br, &num_cfm_mep_infos);
 133         br_cfm_peer_mep_count(br, &num_cfm_peer_mep_infos);
 134
 135         vinfo_sz += nla_total_size(0);  /* IFLA_BRIDGE_CFM */
 136         /* For each status struct the MEP instance (u32) is added */
 137         /* MEP instance (u32) + br_cfm_mep_status */
 138         vinfo_sz += num_cfm_mep_infos *
 139                      /*IFLA_BRIDGE_CFM_MEP_STATUS_INSTANCE */
 140                     (nla_total_size(sizeof(u32))
 141                      /* IFLA_BRIDGE_CFM_MEP_STATUS_OPCODE_UNEXP_SEEN */
 142                      + nla_total_size(sizeof(u32))
 143                      /* IFLA_BRIDGE_CFM_MEP_STATUS_VERSION_UNEXP_SEEN */
 144                      + nla_total_size(sizeof(u32))
 145                      /* IFLA_BRIDGE_CFM_MEP_STATUS_RX_LEVEL_LOW_SEEN */
 146                      + nla_total_size(sizeof(u32)));
 147         /* MEP instance (u32) + br_cfm_cc_peer_status */
 148         vinfo_sz += num_cfm_peer_mep_infos *
 149                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_INSTANCE */
 150                     (nla_total_size(sizeof(u32))
 151                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_PEER_MEPID */
 152                      + nla_total_size(sizeof(u32))
 153                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_CCM_DEFECT */
 154                      + nla_total_size(sizeof(u32))
 155                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_RDI */
 156                      + nla_total_size(sizeof(u32))
 157                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_PORT_TLV_VALUE */
 158                      + nla_total_size(sizeof(u8))
 159                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_IF_TLV_VALUE */
 160                      + nla_total_size(sizeof(u8))
 161                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEEN */
 162                      + nla_total_size(sizeof(u32))
 163                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_TLV_SEEN */
 164                      + nla_total_size(sizeof(u32))
 165                      /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEQ_UNEXP_SEEN */
 166                      + nla_total_size(sizeof(u32)));
 167
 168         return vinfo_sz;
 169 }
 170
 171 static inline size_t br_port_info_size(void)
 172 {
 173         return nla_total_size(1)        /* IFLA_BRPORT_STATE  */
 174                 + nla_total_size(2)     /* IFLA_BRPORT_PRIORITY */
 175                 + nla_total_size(4)     /* IFLA_BRPORT_COST */
 176                 + nla_total_size(1)     /* IFLA_BRPORT_MODE */
 177                 + nla_total_size(1)     /* IFLA_BRPORT_GUARD */
 178                 + nla_total_size(1)     /* IFLA_BRPORT_PROTECT */
 179                 + nla_total_size(1)     /* IFLA_BRPORT_FAST_LEAVE */
 180                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_TO_UCAST */
 181                 + nla_total_size(1)     /* IFLA_BRPORT_LEARNING */
 182                 + nla_total_size(1)     /* IFLA_BRPORT_UNICAST_FLOOD */
 183                 + nla_total_size(1)     /* IFLA_BRPORT_MCAST_FLOOD */
 184                 + nla_total_size(1)     /* IFLA_BRPORT_BCAST_FLOOD */
 185                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP */
 186                 + nla_total_size(1)     /* IFLA_BRPORT_PROXYARP_WIFI */
 187                 + nla_total_size(1)     /* IFLA_BRPORT_VLAN_TUNNEL */
 188                 + nla_total_size(1)     /* IFLA_BRPORT_NEIGH_SUPPRESS */
 189                 + nla_total_size(1)     /* IFLA_BRPORT_ISOLATED */
 190                 + nla_total_size(1)     /* IFLA_BRPORT_LOCKED */
 191                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
 192                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
 193                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_PORT */
 194                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_COST */
 195                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_ID */
 196                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_NO */
 197                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
 198                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_CONFIG_PENDING */
 199                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
 200                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
 201                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
 202 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 203                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MULTICAST_ROUTER */
 204 #endif
 205                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_GROUP_FWD_MASK */
 206                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MRP_RING_OPEN */
 207                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MRP_IN_OPEN */
 208                 + nla_total_size(sizeof(u32))   /* IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT */
 209                 + nla_total_size(sizeof(u32))   /* IFLA_BRPORT_MCAST_EHT_HOSTS_CNT */
 210                 + 0;
 211 }
 212
 213 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
 214 {
 215         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
 216                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
 217                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
 218                 + nla_total_size(4) /* IFLA_MASTER */
 219                 + nla_total_size(4) /* IFLA_MTU */
 220                 + nla_total_size(4) /* IFLA_LINK */
 221                 + nla_total_size(1) /* IFLA_OPERSTATE */
 222                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
 223                 + nla_total_size(br_get_link_af_size_filtered(dev,
 224                                  filter_mask)) /* IFLA_AF_SPEC */
 225                 + nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */
 226 }
 227
 228 static int br_port_fill_attrs(struct sk_buff *skb,
 229                               const struct net_bridge_port *p)
 230 {
 231         u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
 232         struct net_bridge_port *backup_p;
 233         u64 timerval;
 234
 235         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
 236             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
 237             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
 238             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
 239             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
 240             nla_put_u8(skb, IFLA_BRPORT_PROTECT,
 241                        !!(p->flags & BR_ROOT_BLOCK)) ||
 242             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
 243                        !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
 244             nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
 245                        !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
 246             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
 247             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
 248                        !!(p->flags & BR_FLOOD)) ||
 249             nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
 250                        !!(p->flags & BR_MCAST_FLOOD)) ||
 251             nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
 252                        !!(p->flags & BR_BCAST_FLOOD)) ||
 253             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
 254             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
 255                        !!(p->flags & BR_PROXYARP_WIFI)) ||
 256             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
 257                     &p->designated_root) ||
 258             nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
 259                     &p->designated_bridge) ||
 260             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
 261             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
 262             nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
 263             nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
 264             nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
 265                        p->topology_change_ack) ||
 266             nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
 267             nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
 268                                                         BR_VLAN_TUNNEL)) ||
 269             nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
 270             nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
 271                        !!(p->flags & BR_NEIGH_SUPPRESS)) ||
 272             nla_put_u8(skb, IFLA_BRPORT_MRP_RING_OPEN, !!(p->flags &
 273                                                           BR_MRP_LOST_CONT)) ||
 274             nla_put_u8(skb, IFLA_BRPORT_MRP_IN_OPEN,
 275                        !!(p->flags & BR_MRP_LOST_IN_CONT)) ||
 276             nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)) ||
 277             nla_put_u8(skb, IFLA_BRPORT_LOCKED, !!(p->flags & BR_PORT_LOCKED)))
 278                 return -EMSGSIZE;
 279
 280         timerval = br_timer_value(&p->message_age_timer);
 281         if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
 282                               IFLA_BRPORT_PAD))
 283                 return -EMSGSIZE;
 284         timerval = br_timer_value(&p->forward_delay_timer);
 285         if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
 286                               IFLA_BRPORT_PAD))
 287                 return -EMSGSIZE;
 288         timerval = br_timer_value(&p->hold_timer);
 289         if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
 290                               IFLA_BRPORT_PAD))
 291                 return -EMSGSIZE;
 292
 293 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 294         if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
 295                        p->multicast_ctx.multicast_router) ||
 296             nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT,
 297                         p->multicast_eht_hosts_limit) ||
 298             nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_CNT,
 299                         p->multicast_eht_hosts_cnt))
 300                 return -EMSGSIZE;
 301 #endif
 302
 303         /* we might be called only with br->lock */
 304         rcu_read_lock();
 305         backup_p = rcu_dereference(p->backup_port);
 306         if (backup_p)
 307                 nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT,
 308                             backup_p->dev->ifindex);
 309         rcu_read_unlock();
 310
 311         return 0;
 312 }
 313
 314 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
 315                                     u16 vid_end, u16 flags)
 316 {
 317         struct  bridge_vlan_info vinfo;
 318
 319         if ((vid_end - vid_start) > 0) {
 320                 /* add range to skb */
 321                 vinfo.vid = vid_start;
 322                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
 323                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 324                             sizeof(vinfo), &vinfo))
 325                         goto nla_put_failure;
 326
 327                 vinfo.vid = vid_end;
 328                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
 329                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 330                             sizeof(vinfo), &vinfo))
 331                         goto nla_put_failure;
 332         } else {
 333                 vinfo.vid = vid_start;
 334                 vinfo.flags = flags;
 335                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 336                             sizeof(vinfo), &vinfo))
 337                         goto nla_put_failure;
 338         }
 339
 340         return 0;
 341
 342 nla_put_failure:
 343         return -EMSGSIZE;
 344 }
 345
 346 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
 347                                          struct net_bridge_vlan_group *vg)
 348 {
 349         struct net_bridge_vlan *v;
 350         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 351         u16 flags, pvid;
 352         int err = 0;
 353
 354         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
 355          * and mark vlan info with begin and end flags
 356          * if vlaninfo represents a range
 357          */
 358         pvid = br_get_pvid(vg);
 359         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 360                 flags = 0;
 361                 if (!br_vlan_should_use(v))
 362                         continue;
 363                 if (v->vid == pvid)
 364                         flags |= BRIDGE_VLAN_INFO_PVID;
 365
 366                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 367                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 368
 369                 if (vid_range_start == 0) {
 370                         goto initvars;
 371                 } else if ((v->vid - vid_range_end) == 1 &&
 372                         flags == vid_range_flags) {
 373                         vid_range_end = v->vid;
 374                         continue;
 375                 } else {
 376                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 377                                                        vid_range_end,
 378                                                        vid_range_flags);
 379                         if (err)
 380                                 return err;
 381                 }
 382
 383 initvars:
 384                 vid_range_start = v->vid;
 385                 vid_range_end = v->vid;
 386                 vid_range_flags = flags;
 387         }
 388
 389         if (vid_range_start != 0) {
 390                 /* Call it once more to send any left over vlans */
 391                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 392                                                vid_range_end,
 393                                                vid_range_flags);
 394                 if (err)
 395                         return err;
 396         }
 397
 398         return 0;
 399 }
 400
 401 static int br_fill_ifvlaninfo(struct sk_buff *skb,
 402                               struct net_bridge_vlan_group *vg)
 403 {
 404         struct bridge_vlan_info vinfo;
 405         struct net_bridge_vlan *v;
 406         u16 pvid;
 407
 408         pvid = br_get_pvid(vg);
 409         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 410                 if (!br_vlan_should_use(v))
 411                         continue;
 412
 413                 vinfo.vid = v->vid;
 414                 vinfo.flags = 0;
 415                 if (v->vid == pvid)
 416                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
 417
 418                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 419                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 420
 421                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 422                             sizeof(vinfo), &vinfo))
 423                         goto nla_put_failure;
 424         }
 425
 426         return 0;
 427
 428 nla_put_failure:
 429         return -EMSGSIZE;
 430 }
 431
 432 /*
 433  * Create one netlink message for one interface
 434  * Contains port and master info as well as carrier and bridge state.
 435  */
 436 static int br_fill_ifinfo(struct sk_buff *skb,
 437                           const struct net_bridge_port *port,
 438                           u32 pid, u32 seq, int event, unsigned int flags,
 439                           u32 filter_mask, const struct net_device *dev,
 440                           bool getlink)
 441 {
 442         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
 443         struct nlattr *af = NULL;
 444         struct net_bridge *br;
 445         struct ifinfomsg *hdr;
 446         struct nlmsghdr *nlh;
 447
 448         if (port)
 449                 br = port->br;
 450         else
 451                 br = netdev_priv(dev);
 452
 453         br_debug(br, "br_fill_info event %d port %s master %s\n",
 454                      event, dev->name, br->dev->name);
 455
 456         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
 457         if (nlh == NULL)
 458                 return -EMSGSIZE;
 459
 460         hdr = nlmsg_data(nlh);
 461         hdr->ifi_family = AF_BRIDGE;
 462         hdr->__ifi_pad = 0;
 463         hdr->ifi_type = dev->type;
 464         hdr->ifi_index = dev->ifindex;
 465         hdr->ifi_flags = dev_get_flags(dev);
 466         hdr->ifi_change = 0;
 467
 468         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
 469             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
 470             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
 471             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
 472             (dev->addr_len &&
 473              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
 474             (dev->ifindex != dev_get_iflink(dev) &&
 475              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
 476                 goto nla_put_failure;
 477
 478         if (event == RTM_NEWLINK && port) {
 479                 struct nlattr *nest;
 480
 481                 nest = nla_nest_start(skb, IFLA_PROTINFO);
 482                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 483                         goto nla_put_failure;
 484                 nla_nest_end(skb, nest);
 485         }
 486
 487         if (filter_mask & (RTEXT_FILTER_BRVLAN |
 488                            RTEXT_FILTER_BRVLAN_COMPRESSED |
 489                            RTEXT_FILTER_MRP |
 490                            RTEXT_FILTER_CFM_CONFIG |
 491                            RTEXT_FILTER_CFM_STATUS |
 492                            RTEXT_FILTER_MST)) {
 493                 af = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
 494                 if (!af)
 495                         goto nla_put_failure;
 496         }
 497
 498         /* Check if  the VID information is requested */
 499         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
 500             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
 501                 struct net_bridge_vlan_group *vg;
 502                 int err;
 503
 504                 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
 505                 rcu_read_lock();
 506                 if (port)
 507                         vg = nbp_vlan_group_rcu(port);
 508                 else
 509                         vg = br_vlan_group_rcu(br);
 510
 511                 if (!vg || !vg->num_vlans) {
 512                         rcu_read_unlock();
 513                         goto done;
 514                 }
 515                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 516                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 517                 else
 518                         err = br_fill_ifvlaninfo(skb, vg);
 519
 520                 if (port && (port->flags & BR_VLAN_TUNNEL))
 521                         err = br_fill_vlan_tunnel_info(skb, vg);
 522                 rcu_read_unlock();
 523                 if (err)
 524                         goto nla_put_failure;
 525         }
 526
 527         if (filter_mask & RTEXT_FILTER_MRP) {
 528                 int err;
 529
 530                 if (!br_mrp_enabled(br) || port)
 531                         goto done;
 532
 533                 rcu_read_lock();
 534                 err = br_mrp_fill_info(skb, br);
 535                 rcu_read_unlock();
 536
 537                 if (err)
 538                         goto nla_put_failure;
 539         }
 540
 541         if (filter_mask & (RTEXT_FILTER_CFM_CONFIG | RTEXT_FILTER_CFM_STATUS)) {
 542                 struct nlattr *cfm_nest = NULL;
 543                 int err;
 544
 545                 if (!br_cfm_created(br) || port)
 546                         goto done;
 547
 548                 cfm_nest = nla_nest_start(skb, IFLA_BRIDGE_CFM);
 549                 if (!cfm_nest)
 550                         goto nla_put_failure;
 551
 552                 if (filter_mask & RTEXT_FILTER_CFM_CONFIG) {
 553                         rcu_read_lock();
 554                         err = br_cfm_config_fill_info(skb, br);
 555                         rcu_read_unlock();
 556                         if (err)
 557                                 goto nla_put_failure;
 558                 }
 559
 560                 if (filter_mask & RTEXT_FILTER_CFM_STATUS) {
 561                         rcu_read_lock();
 562                         err = br_cfm_status_fill_info(skb, br, getlink);
 563                         rcu_read_unlock();
 564                         if (err)
 565                                 goto nla_put_failure;
 566                 }
 567
 568                 nla_nest_end(skb, cfm_nest);
 569         }
 570
 571         if ((filter_mask & RTEXT_FILTER_MST) &&
 572             br_opt_get(br, BROPT_MST_ENABLED) && port) {
 573                 const struct net_bridge_vlan_group *vg = nbp_vlan_group(port);
 574                 struct nlattr *mst_nest;
 575                 int err;
 576
 577                 if (!vg || !vg->num_vlans)
 578                         goto done;
 579
 580                 mst_nest = nla_nest_start(skb, IFLA_BRIDGE_MST);
 581                 if (!mst_nest)
 582                         goto nla_put_failure;
 583
 584                 err = br_mst_fill_info(skb, vg);
 585                 if (err)
 586                         goto nla_put_failure;
 587
 588                 nla_nest_end(skb, mst_nest);
 589         }
 590
 591 done:
 592
 593         if (af)
 594                 nla_nest_end(skb, af);
 595         nlmsg_end(skb, nlh);
 596         return 0;
 597
 598 nla_put_failure:
 599         nlmsg_cancel(skb, nlh);
 600         return -EMSGSIZE;
 601 }
 602
 603 void br_info_notify(int event, const struct net_bridge *br,
 604                     const struct net_bridge_port *port, u32 filter)
 605 {
 606         struct net_device *dev;
 607         struct sk_buff *skb;
 608         int err = -ENOBUFS;
 609         struct net *net;
 610         u16 port_no = 0;
 611
 612         if (WARN_ON(!port && !br))
 613                 return;
 614
 615         if (port) {
 616                 dev = port->dev;
 617                 br = port->br;
 618                 port_no = port->port_no;
 619         } else {
 620                 dev = br->dev;
 621         }
 622
 623         net = dev_net(dev);
 624         br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
 625
 626         skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
 627         if (skb == NULL)
 628                 goto errout;
 629
 630         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev, false);
 631         if (err < 0) {
 632                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 633                 WARN_ON(err == -EMSGSIZE);
 634                 kfree_skb(skb);
 635                 goto errout;
 636         }
 637         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 638         return;
 639 errout:
 640         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 641 }
 642
 643 /* Notify listeners of a change in bridge or port information */
 644 void br_ifinfo_notify(int event, const struct net_bridge *br,
 645                       const struct net_bridge_port *port)
 646 {
 647         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 648
 649         return br_info_notify(event, br, port, filter);
 650 }
 651
 652 /*
 653  * Dump information about all ports, in response to GETLINK
 654  */
 655 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 656                struct net_device *dev, u32 filter_mask, int nlflags)
 657 {
 658         struct net_bridge_port *port = br_port_get_rtnl(dev);
 659
 660         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 661             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) &&
 662             !(filter_mask & RTEXT_FILTER_MRP) &&
 663             !(filter_mask & RTEXT_FILTER_CFM_CONFIG) &&
 664             !(filter_mask & RTEXT_FILTER_CFM_STATUS))
 665                 return 0;
 666
 667         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 668                               filter_mask, dev, true);
 669 }
 670
 671 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 672                         int cmd, struct bridge_vlan_info *vinfo, bool *changed,
 673                         struct netlink_ext_ack *extack)
 674 {
 675         bool curr_change;
 676         int err = 0;
 677
 678         switch (cmd) {
 679         case RTM_SETLINK:
 680                 if (p) {
 681                         /* if the MASTER flag is set this will act on the global
 682                          * per-VLAN entry as well
 683                          */
 684                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
 685                                            &curr_change, extack);
 686                 } else {
 687                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 688                         err = br_vlan_add(br, vinfo->vid, vinfo->flags,
 689                                           &curr_change, extack);
 690                 }
 691                 if (curr_change)
 692                         *changed = true;
 693                 break;
 694
 695         case RTM_DELLINK:
 696                 if (p) {
 697                         if (!nbp_vlan_delete(p, vinfo->vid))
 698                                 *changed = true;
 699
 700                         if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
 701                             !br_vlan_delete(p->br, vinfo->vid))
 702                                 *changed = true;
 703                 } else if (!br_vlan_delete(br, vinfo->vid)) {
 704                         *changed = true;
 705                 }
 706                 break;
 707         }
 708
 709         return err;
 710 }
 711
 712 int br_process_vlan_info(struct net_bridge *br,
 713                          struct net_bridge_port *p, int cmd,
 714                          struct bridge_vlan_info *vinfo_curr,
 715                          struct bridge_vlan_info **vinfo_last,
 716                          bool *changed,
 717                          struct netlink_ext_ack *extack)
 718 {
 719         int err, rtm_cmd;
 720
 721         if (!br_vlan_valid_id(vinfo_curr->vid, extack))
 722                 return -EINVAL;
 723
 724         /* needed for vlan-only NEWVLAN/DELVLAN notifications */
 725         rtm_cmd = br_afspec_cmd_to_rtm(cmd);
 726
 727         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 728                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 729                         return -EINVAL;
 730                 *vinfo_last = vinfo_curr;
 731                 return 0;
 732         }
 733
 734         if (*vinfo_last) {
 735                 struct bridge_vlan_info tmp_vinfo;
 736                 int v, v_change_start = 0;
 737
 738                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 739                         return -EINVAL;
 740
 741                 memcpy(&tmp_vinfo, *vinfo_last,
 742                        sizeof(struct bridge_vlan_info));
 743                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
 744                         bool curr_change = false;
 745
 746                         tmp_vinfo.vid = v;
 747                         err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change,
 748                                            extack);
 749                         if (err)
 750                                 break;
 751                         if (curr_change) {
 752                                 *changed = curr_change;
 753                                 if (!v_change_start)
 754                                         v_change_start = v;
 755                         } else {
 756                                 /* nothing to notify yet */
 757                                 if (!v_change_start)
 758                                         continue;
 759                                 br_vlan_notify(br, p, v_change_start,
 760                                                v - 1, rtm_cmd);
 761                                 v_change_start = 0;
 762                         }
 763                         cond_resched();
 764                 }
 765                 /* v_change_start is set only if the last/whole range changed */
 766                 if (v_change_start)
 767                         br_vlan_notify(br, p, v_change_start,
 768                                        v - 1, rtm_cmd);
 769
 770                 *vinfo_last = NULL;
 771
 772                 return err;
 773         }
 774
 775         err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
 776         if (*changed)
 777                 br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd);
 778
 779         return err;
 780 }
 781
 782 static int br_afspec(struct net_bridge *br,
 783                      struct net_bridge_port *p,
 784                      struct nlattr *af_spec,
 785                      int cmd, bool *changed,
 786                      struct netlink_ext_ack *extack)
 787 {
 788         struct bridge_vlan_info *vinfo_curr = NULL;
 789         struct bridge_vlan_info *vinfo_last = NULL;
 790         struct nlattr *attr;
 791         struct vtunnel_info tinfo_last = {};
 792         struct vtunnel_info tinfo_curr = {};
 793         int err = 0, rem;
 794
 795         nla_for_each_nested(attr, af_spec, rem) {
 796                 err = 0;
 797                 switch (nla_type(attr)) {
 798                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
 799                         if (!p || !(p->flags & BR_VLAN_TUNNEL))
 800                                 return -EINVAL;
 801                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
 802                         if (err)
 803                                 return err;
 804                         err = br_process_vlan_tunnel_info(br, p, cmd,
 805                                                           &tinfo_curr,
 806                                                           &tinfo_last,
 807                                                           changed);
 808                         if (err)
 809                                 return err;
 810                         break;
 811                 case IFLA_BRIDGE_VLAN_INFO:
 812                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 813                                 return -EINVAL;
 814                         vinfo_curr = nla_data(attr);
 815                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
 816                                                    &vinfo_last, changed,
 817                                                    extack);
 818                         if (err)
 819                                 return err;
 820                         break;
 821                 case IFLA_BRIDGE_MRP:
 822                         err = br_mrp_parse(br, p, attr, cmd, extack);
 823                         if (err)
 824                                 return err;
 825                         break;
 826                 case IFLA_BRIDGE_CFM:
 827                         err = br_cfm_parse(br, p, attr, cmd, extack);
 828                         if (err)
 829                                 return err;
 830                         break;
 831                 case IFLA_BRIDGE_MST:
 832                         if (!p) {
 833                                 NL_SET_ERR_MSG(extack,
 834                                                "MST states can only be set on bridge ports");
 835                                 return -EINVAL;
 836                         }
 837
 838                         if (cmd != RTM_SETLINK) {
 839                                 NL_SET_ERR_MSG(extack,
 840                                                "MST states can only be set through RTM_SETLINK");
 841                                 return -EINVAL;
 842                         }
 843
 844                         err = br_mst_process(p, attr, extack);
 845                         if (err)
 846                                 return err;
 847                         break;
 848                 }
 849         }
 850
 851         return err;
 852 }
 853
 854 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 855         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 856         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 857         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 858         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 859         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 860         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 861         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 862         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 863         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 864         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 865         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 866         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 867         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
 868         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
 869         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
 870         [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
 871         [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
 872         [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
 873         [IFLA_BRPORT_ISOLATED]  = { .type = NLA_U8 },
 874         [IFLA_BRPORT_LOCKED] = { .type = NLA_U8 },
 875         [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
 876         [IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT] = { .type = NLA_U32 },
 877 };
 878
 879 /* Change the state of the port and notify spanning tree */
 880 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 881 {
 882         if (state > BR_STATE_BLOCKING)
 883                 return -EINVAL;
 884
 885         /* if kernel STP is running, don't allow changes */
 886         if (p->br->stp_enabled == BR_KERNEL_STP)
 887                 return -EBUSY;
 888
 889         /* if device is not up, change is not allowed
 890          * if link is not present, only allowable state is disabled
 891          */
 892         if (!netif_running(p->dev) ||
 893             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 894                 return -ENETDOWN;
 895
 896         br_set_state(p, state);
 897         br_port_state_selection(p->br);
 898         return 0;
 899 }
 900
 901 /* Set/clear or port flags based on attribute */
 902 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 903                              int attrtype, unsigned long mask)
 904 {
 905         if (!tb[attrtype])
 906                 return;
 907
 908         if (nla_get_u8(tb[attrtype]))
 909                 p->flags |= mask;
 910         else
 911                 p->flags &= ~mask;
 912 }
 913
 914 /* Process bridge protocol info on port */
 915 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[],
 916                       struct netlink_ext_ack *extack)
 917 {
 918         unsigned long old_flags, changed_mask;
 919         bool br_vlan_tunnel_old;
 920         int err;
 921
 922         old_flags = p->flags;
 923         br_vlan_tunnel_old = (old_flags & BR_VLAN_TUNNEL) ? true : false;
 924
 925         br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 926         br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 927         br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE,
 928                          BR_MULTICAST_FAST_LEAVE);
 929         br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 930         br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 931         br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 932         br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
 933         br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST,
 934                          BR_MULTICAST_TO_UNICAST);
 935         br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
 936         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 937         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 938         br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
 939         br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS, BR_NEIGH_SUPPRESS);
 940         br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
 941         br_set_port_flag(p, tb, IFLA_BRPORT_LOCKED, BR_PORT_LOCKED);
 942
 943         changed_mask = old_flags ^ p->flags;
 944
 945         err = br_switchdev_set_port_flag(p, p->flags, changed_mask, extack);
 946         if (err) {
 947                 p->flags = old_flags;
 948                 return err;
 949         }
 950
 951         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
 952                 nbp_vlan_tunnel_info_flush(p);
 953
 954         br_port_flags_change(p, changed_mask);
 955
 956         if (tb[IFLA_BRPORT_COST]) {
 957                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 958                 if (err)
 959                         return err;
 960         }
 961
 962         if (tb[IFLA_BRPORT_PRIORITY]) {
 963                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 964                 if (err)
 965                         return err;
 966         }
 967
 968         if (tb[IFLA_BRPORT_STATE]) {
 969                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 970                 if (err)
 971                         return err;
 972         }
 973
 974         if (tb[IFLA_BRPORT_FLUSH])
 975                 br_fdb_delete_by_port(p->br, p, 0, 0);
 976
 977 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 978         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 979                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 980
 981                 err = br_multicast_set_port_router(&p->multicast_ctx,
 982                                                    mcast_router);
 983                 if (err)
 984                         return err;
 985         }
 986
 987         if (tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]) {
 988                 u32 hlimit;
 989
 990                 hlimit = nla_get_u32(tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]);
 991                 err = br_multicast_eht_set_hosts_limit(p, hlimit);
 992                 if (err)
 993                         return err;
 994         }
 995 #endif
 996
 997         if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
 998                 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
 999
1000                 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
1001                         return -EINVAL;
1002                 p->group_fwd_mask = fwd_mask;
1003         }
1004
1005         if (tb[IFLA_BRPORT_BACKUP_PORT]) {
1006                 struct net_device *backup_dev = NULL;
1007                 u32 backup_ifindex;
1008
1009                 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
1010                 if (backup_ifindex) {
1011                         backup_dev = __dev_get_by_index(dev_net(p->dev),
1012                                                         backup_ifindex);
1013                         if (!backup_dev)
1014                                 return -ENOENT;
1015                 }
1016
1017                 err = nbp_backup_change(p, backup_dev);
1018                 if (err)
1019                         return err;
1020         }
1021
1022         return 0;
1023 }
1024
1025 /* Change state and parameters on port. */
1026 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags,
1027                struct netlink_ext_ack *extack)
1028 {
1029         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
1030         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
1031         struct net_bridge_port *p;
1032         struct nlattr *protinfo;
1033         struct nlattr *afspec;
1034         bool changed = false;
1035         int err = 0;
1036
1037         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
1038         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
1039         if (!protinfo && !afspec)
1040                 return 0;
1041
1042         p = br_port_get_rtnl(dev);
1043         /* We want to accept dev as bridge itself if the AF_SPEC
1044          * is set to see if someone is setting vlan info on the bridge
1045          */
1046         if (!p && !afspec)
1047                 return -EINVAL;
1048
1049         if (p && protinfo) {
1050                 if (protinfo->nla_type & NLA_F_NESTED) {
1051                         err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX,
1052                                                           protinfo,
1053                                                           br_port_policy,
1054                                                           NULL);
1055                         if (err)
1056                                 return err;
1057
1058                         spin_lock_bh(&p->br->lock);
1059                         err = br_setport(p, tb, extack);
1060                         spin_unlock_bh(&p->br->lock);
1061                 } else {
1062                         /* Binary compatibility with old RSTP */
1063                         if (nla_len(protinfo) < sizeof(u8))
1064                                 return -EINVAL;
1065
1066                         spin_lock_bh(&p->br->lock);
1067                         err = br_set_port_state(p, nla_get_u8(protinfo));
1068                         spin_unlock_bh(&p->br->lock);
1069                 }
1070                 if (err)
1071                         goto out;
1072                 changed = true;
1073         }
1074
1075         if (afspec)
1076                 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
1077
1078         if (changed)
1079                 br_ifinfo_notify(RTM_NEWLINK, br, p);
1080 out:
1081         return err;
1082 }
1083
1084 /* Delete port information */
1085 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
1086 {
1087         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
1088         struct net_bridge_port *p;
1089         struct nlattr *afspec;
1090         bool changed = false;
1091         int err = 0;
1092
1093         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
1094         if (!afspec)
1095                 return 0;
1096
1097         p = br_port_get_rtnl(dev);
1098         /* We want to accept dev as bridge itself as well */
1099         if (!p && !netif_is_bridge_master(dev))
1100                 return -EINVAL;
1101
1102         err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL);
1103         if (changed)
1104                 /* Send RTM_NEWLINK because userspace
1105                  * expects RTM_NEWLINK for vlan dels
1106                  */
1107                 br_ifinfo_notify(RTM_NEWLINK, br, p);
1108
1109         return err;
1110 }
1111
1112 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
1113                        struct netlink_ext_ack *extack)
1114 {
1115         if (tb[IFLA_ADDRESS]) {
1116                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1117                         return -EINVAL;
1118                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1119                         return -EADDRNOTAVAIL;
1120         }
1121
1122         if (!data)
1123                 return 0;
1124
1125 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1126         if (data[IFLA_BR_VLAN_PROTOCOL] &&
1127             !eth_type_vlan(nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])))
1128                 return -EPROTONOSUPPORT;
1129
1130         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1131                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1132
1133                 if (defpvid >= VLAN_VID_MASK)
1134                         return -EINVAL;
1135         }
1136 #endif
1137
1138         return 0;
1139 }
1140
1141 static int br_port_slave_changelink(struct net_device *brdev,
1142                                     struct net_device *dev,
1143                                     struct nlattr *tb[],
1144                                     struct nlattr *data[],
1145                                     struct netlink_ext_ack *extack)
1146 {
1147         struct net_bridge *br = netdev_priv(brdev);
1148         int ret;
1149
1150         if (!data)
1151                 return 0;
1152
1153         spin_lock_bh(&br->lock);
1154         ret = br_setport(br_port_get_rtnl(dev), data, extack);
1155         spin_unlock_bh(&br->lock);
1156
1157         return ret;
1158 }
1159
1160 static int br_port_fill_slave_info(struct sk_buff *skb,
1161                                    const struct net_device *brdev,
1162                                    const struct net_device *dev)
1163 {
1164         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
1165 }
1166
1167 static size_t br_port_get_slave_size(const struct net_device *brdev,
1168                                      const struct net_device *dev)
1169 {
1170         return br_port_info_size();
1171 }
1172
1173 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1174         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1175         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
1176         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
1177         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1178         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1179         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1180         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1181         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1182         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1183         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1184                                  .len  = ETH_ALEN },
1185         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1186         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1187         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1188         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1189         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1190         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1191         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1192         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1193         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1194         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1195         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1196         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1197         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1198         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1199         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1200         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1201         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1202         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1203         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1204         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1205         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1206         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1207         [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1208         [IFLA_BR_MULTI_BOOLOPT] =
1209                 NLA_POLICY_EXACT_LEN(sizeof(struct br_boolopt_multi)),
1210 };
1211
1212 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1213                          struct nlattr *data[],
1214                          struct netlink_ext_ack *extack)
1215 {
1216         struct net_bridge *br = netdev_priv(brdev);
1217         int err;
1218
1219         if (!data)
1220                 return 0;
1221
1222         if (data[IFLA_BR_FORWARD_DELAY]) {
1223                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1224                 if (err)
1225                         return err;
1226         }
1227
1228         if (data[IFLA_BR_HELLO_TIME]) {
1229                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1230                 if (err)
1231                         return err;
1232         }
1233
1234         if (data[IFLA_BR_MAX_AGE]) {
1235                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1236                 if (err)
1237                         return err;
1238         }
1239
1240         if (data[IFLA_BR_AGEING_TIME]) {
1241                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1242                 if (err)
1243                         return err;
1244         }
1245
1246         if (data[IFLA_BR_STP_STATE]) {
1247                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1248
1249                 err = br_stp_set_enabled(br, stp_enabled, extack);
1250                 if (err)
1251                         return err;
1252         }
1253
1254         if (data[IFLA_BR_PRIORITY]) {
1255                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1256
1257                 br_stp_set_bridge_priority(br, priority);
1258         }
1259
1260         if (data[IFLA_BR_VLAN_FILTERING]) {
1261                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1262
1263                 err = br_vlan_filter_toggle(br, vlan_filter, extack);
1264                 if (err)
1265                         return err;
1266         }
1267
1268 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1269         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1270                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1271
1272                 err = __br_vlan_set_proto(br, vlan_proto, extack);
1273                 if (err)
1274                         return err;
1275         }
1276
1277         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1278                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1279
1280                 err = __br_vlan_set_default_pvid(br, defpvid, extack);
1281                 if (err)
1282                         return err;
1283         }
1284
1285         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1286                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1287
1288                 err = br_vlan_set_stats(br, vlan_stats);
1289                 if (err)
1290                         return err;
1291         }
1292
1293         if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1294                 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1295
1296                 err = br_vlan_set_stats_per_port(br, per_port);
1297                 if (err)
1298                         return err;
1299         }
1300 #endif
1301
1302         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1303                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1304
1305                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1306                         return -EINVAL;
1307                 br->group_fwd_mask = fwd_mask;
1308         }
1309
1310         if (data[IFLA_BR_GROUP_ADDR]) {
1311                 u8 new_addr[ETH_ALEN];
1312
1313                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1314                         return -EINVAL;
1315                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1316                 if (!is_link_local_ether_addr(new_addr))
1317                         return -EINVAL;
1318                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1319                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1320                     new_addr[5] == 3)           /* 802.1X PAE address */
1321                         return -EINVAL;
1322                 spin_lock_bh(&br->lock);
1323                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1324                 spin_unlock_bh(&br->lock);
1325                 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1326                 br_recalculate_fwd_mask(br);
1327         }
1328
1329         if (data[IFLA_BR_FDB_FLUSH]) {
1330                 struct net_bridge_fdb_flush_desc desc = {
1331                         .flags_mask = BR_FDB_STATIC
1332                 };
1333
1334                 br_fdb_flush(br, &desc);
1335         }
1336
1337 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1338         if (data[IFLA_BR_MCAST_ROUTER]) {
1339                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1340
1341                 err = br_multicast_set_router(&br->multicast_ctx,
1342                                               multicast_router);
1343                 if (err)
1344                         return err;
1345         }
1346
1347         if (data[IFLA_BR_MCAST_SNOOPING]) {
1348                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1349
1350                 err = br_multicast_toggle(br, mcast_snooping, extack);
1351                 if (err)
1352                         return err;
1353         }
1354
1355         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1356                 u8 val;
1357
1358                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1359                 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1360         }
1361
1362         if (data[IFLA_BR_MCAST_QUERIER]) {
1363                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1364
1365                 err = br_multicast_set_querier(&br->multicast_ctx,
1366                                                mcast_querier);
1367                 if (err)
1368                         return err;
1369         }
1370
1371         if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
1372                 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
1373                         RHT_ELASTICITY);
1374
1375         if (data[IFLA_BR_MCAST_HASH_MAX])
1376                 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1377
1378         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1379                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1380
1381                 br->multicast_ctx.multicast_last_member_count = val;
1382         }
1383
1384         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1385                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1386
1387                 br->multicast_ctx.multicast_startup_query_count = val;
1388         }
1389
1390         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1391                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1392
1393                 br->multicast_ctx.multicast_last_member_interval = clock_t_to_jiffies(val);
1394         }
1395
1396         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1397                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1398
1399                 br->multicast_ctx.multicast_membership_interval = clock_t_to_jiffies(val);
1400         }
1401
1402         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1403                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1404
1405                 br->multicast_ctx.multicast_querier_interval = clock_t_to_jiffies(val);
1406         }
1407
1408         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1409                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1410
1411                 br_multicast_set_query_intvl(&br->multicast_ctx, val);
1412         }
1413
1414         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1415                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1416
1417                 br->multicast_ctx.multicast_query_response_interval = clock_t_to_jiffies(val);
1418         }
1419
1420         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1421                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1422
1423                 br_multicast_set_startup_query_intvl(&br->multicast_ctx, val);
1424         }
1425
1426         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1427                 __u8 mcast_stats;
1428
1429                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1430                 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1431         }
1432
1433         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1434                 __u8 igmp_version;
1435
1436                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1437                 err = br_multicast_set_igmp_version(&br->multicast_ctx,
1438                                                     igmp_version);
1439                 if (err)
1440                         return err;
1441         }
1442
1443 #if IS_ENABLED(CONFIG_IPV6)
1444         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1445                 __u8 mld_version;
1446
1447                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1448                 err = br_multicast_set_mld_version(&br->multicast_ctx,
1449                                                    mld_version);
1450                 if (err)
1451                         return err;
1452         }
1453 #endif
1454 #endif
1455 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1456         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1457                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1458
1459                 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1460         }
1461
1462         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1463                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1464
1465                 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1466         }
1467
1468         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1469                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1470
1471                 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1472         }
1473 #endif
1474
1475         if (data[IFLA_BR_MULTI_BOOLOPT]) {
1476                 struct br_boolopt_multi *bm;
1477
1478                 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
1479                 err = br_boolopt_multi_toggle(br, bm, extack);
1480                 if (err)
1481                         return err;
1482         }
1483
1484         return 0;
1485 }
1486
1487 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1488                           struct nlattr *tb[], struct nlattr *data[],
1489                           struct netlink_ext_ack *extack)
1490 {
1491         struct net_bridge *br = netdev_priv(dev);
1492         int err;
1493
1494         err = register_netdevice(dev);
1495         if (err)
1496                 return err;
1497
1498         if (tb[IFLA_ADDRESS]) {
1499                 spin_lock_bh(&br->lock);
1500                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1501                 spin_unlock_bh(&br->lock);
1502         }
1503
1504         err = br_changelink(dev, tb, data, extack);
1505         if (err)
1506                 br_dev_delete(dev, NULL);
1507
1508         return err;
1509 }
1510
1511 static size_t br_get_size(const struct net_device *brdev)
1512 {
1513         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1514                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1515                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1516                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1517                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1518                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1519                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1520 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1521                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1522                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1523                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1524                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_PER_PORT */
1525 #endif
1526                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1527                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1528                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1529                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1530                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1531                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1532                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1533                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1534                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1535                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1536                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1537                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1538 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1539                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1540                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1541                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1542                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1543                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1544                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1545                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1546                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1547                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1548                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1549                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1550                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1551                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1552                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1553                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1554                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1555                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1556                br_multicast_querier_state_size() + /* IFLA_BR_MCAST_QUERIER_STATE */
1557 #endif
1558 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1559                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1560                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1561                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1562 #endif
1563                nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
1564                0;
1565 }
1566
1567 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1568 {
1569         struct net_bridge *br = netdev_priv(brdev);
1570         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1571         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1572         u32 age_time = jiffies_to_clock_t(br->max_age);
1573         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1574         u32 stp_enabled = br->stp_enabled;
1575         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1576         u8 vlan_enabled = br_vlan_enabled(br->dev);
1577         struct br_boolopt_multi bm;
1578         u64 clockval;
1579
1580         clockval = br_timer_value(&br->hello_timer);
1581         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1582                 return -EMSGSIZE;
1583         clockval = br_timer_value(&br->tcn_timer);
1584         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1585                 return -EMSGSIZE;
1586         clockval = br_timer_value(&br->topology_change_timer);
1587         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1588                               IFLA_BR_PAD))
1589                 return -EMSGSIZE;
1590         clockval = br_timer_value(&br->gc_work.timer);
1591         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1592                 return -EMSGSIZE;
1593
1594         br_boolopt_multi_get(br, &bm);
1595         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1596             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1597             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1598             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1599             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1600             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1601             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1602             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1603             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1604                     &br->bridge_id) ||
1605             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1606                     &br->designated_root) ||
1607             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1608             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1609             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1610             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1611                        br->topology_change_detected) ||
1612             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
1613             nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
1614                 return -EMSGSIZE;
1615
1616 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1617         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1618             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1619             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1620                        br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1621             nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1622                        br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)))
1623                 return -EMSGSIZE;
1624 #endif
1625 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1626         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER,
1627                        br->multicast_ctx.multicast_router) ||
1628             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1629                        br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1630             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1631                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1632             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1633                        br->multicast_ctx.multicast_querier) ||
1634             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1635                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1636             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
1637             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1638             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1639                         br->multicast_ctx.multicast_last_member_count) ||
1640             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1641                         br->multicast_ctx.multicast_startup_query_count) ||
1642             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1643                        br->multicast_ctx.multicast_igmp_version) ||
1644             br_multicast_dump_querier_state(skb, &br->multicast_ctx,
1645                                             IFLA_BR_MCAST_QUERIER_STATE))
1646                 return -EMSGSIZE;
1647 #if IS_ENABLED(CONFIG_IPV6)
1648         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1649                        br->multicast_ctx.multicast_mld_version))
1650                 return -EMSGSIZE;
1651 #endif
1652         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_last_member_interval);
1653         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1654                               IFLA_BR_PAD))
1655                 return -EMSGSIZE;
1656         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_membership_interval);
1657         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1658                               IFLA_BR_PAD))
1659                 return -EMSGSIZE;
1660         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_querier_interval);
1661         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1662                               IFLA_BR_PAD))
1663                 return -EMSGSIZE;
1664         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_interval);
1665         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1666                               IFLA_BR_PAD))
1667                 return -EMSGSIZE;
1668         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_response_interval);
1669         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1670                               IFLA_BR_PAD))
1671                 return -EMSGSIZE;
1672         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_startup_query_interval);
1673         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1674                               IFLA_BR_PAD))
1675                 return -EMSGSIZE;
1676 #endif
1677 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1678         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1679                        br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1680             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1681                        br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1682             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1683                        br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1684                 return -EMSGSIZE;
1685 #endif
1686
1687         return 0;
1688 }
1689
1690 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1691 {
1692         struct net_bridge_port *p = NULL;
1693         struct net_bridge_vlan_group *vg;
1694         struct net_bridge_vlan *v;
1695         struct net_bridge *br;
1696         int numvls = 0;
1697
1698         switch (attr) {
1699         case IFLA_STATS_LINK_XSTATS:
1700                 br = netdev_priv(dev);
1701                 vg = br_vlan_group(br);
1702                 break;
1703         case IFLA_STATS_LINK_XSTATS_SLAVE:
1704                 p = br_port_get_rtnl(dev);
1705                 if (!p)
1706                         return 0;
1707                 vg = nbp_vlan_group(p);
1708                 break;
1709         default:
1710                 return 0;
1711         }
1712
1713         if (vg) {
1714                 /* we need to count all, even placeholder entries */
1715                 list_for_each_entry(v, &vg->vlan_list, vlist)
1716                         numvls++;
1717         }
1718
1719         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1720                nla_total_size_64bit(sizeof(struct br_mcast_stats)) +
1721                (p ? nla_total_size_64bit(sizeof(p->stp_xstats)) : 0) +
1722                nla_total_size(0);
1723 }
1724
1725 static int br_fill_linkxstats(struct sk_buff *skb,
1726                               const struct net_device *dev,
1727                               int *prividx, int attr)
1728 {
1729         struct nlattr *nla __maybe_unused;
1730         struct net_bridge_port *p = NULL;
1731         struct net_bridge_vlan_group *vg;
1732         struct net_bridge_vlan *v;
1733         struct net_bridge *br;
1734         struct nlattr *nest;
1735         int vl_idx = 0;
1736
1737         switch (attr) {
1738         case IFLA_STATS_LINK_XSTATS:
1739                 br = netdev_priv(dev);
1740                 vg = br_vlan_group(br);
1741                 break;
1742         case IFLA_STATS_LINK_XSTATS_SLAVE:
1743                 p = br_port_get_rtnl(dev);
1744                 if (!p)
1745                         return 0;
1746                 br = p->br;
1747                 vg = nbp_vlan_group(p);
1748                 break;
1749         default:
1750                 return -EINVAL;
1751         }
1752
1753         nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE);
1754         if (!nest)
1755                 return -EMSGSIZE;
1756
1757         if (vg) {
1758                 u16 pvid;
1759
1760                 pvid = br_get_pvid(vg);
1761                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1762                         struct bridge_vlan_xstats vxi;
1763                         struct pcpu_sw_netstats stats;
1764
1765                         if (++vl_idx < *prividx)
1766                                 continue;
1767                         memset(&vxi, 0, sizeof(vxi));
1768                         vxi.vid = v->vid;
1769                         vxi.flags = v->flags;
1770                         if (v->vid == pvid)
1771                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1772                         br_vlan_get_stats(v, &stats);
1773                         vxi.rx_bytes = stats.rx_bytes;
1774                         vxi.rx_packets = stats.rx_packets;
1775                         vxi.tx_bytes = stats.tx_bytes;
1776                         vxi.tx_packets = stats.tx_packets;
1777
1778                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1779                                 goto nla_put_failure;
1780                 }
1781         }
1782
1783 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1784         if (++vl_idx >= *prividx) {
1785                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1786                                         sizeof(struct br_mcast_stats),
1787                                         BRIDGE_XSTATS_PAD);
1788                 if (!nla)
1789                         goto nla_put_failure;
1790                 br_multicast_get_stats(br, p, nla_data(nla));
1791         }
1792 #endif
1793
1794         if (p) {
1795                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP,
1796                                         sizeof(p->stp_xstats),
1797                                         BRIDGE_XSTATS_PAD);
1798                 if (!nla)
1799                         goto nla_put_failure;
1800
1801                 spin_lock_bh(&br->lock);
1802                 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats));
1803                 spin_unlock_bh(&br->lock);
1804         }
1805
1806         nla_nest_end(skb, nest);
1807         *prividx = 0;
1808
1809         return 0;
1810
1811 nla_put_failure:
1812         nla_nest_end(skb, nest);
1813         *prividx = vl_idx;
1814
1815         return -EMSGSIZE;
1816 }
1817
1818 static struct rtnl_af_ops br_af_ops __read_mostly = {
1819         .family                 = AF_BRIDGE,
1820         .get_link_af_size       = br_get_link_af_size_filtered,
1821 };
1822
1823 struct rtnl_link_ops br_link_ops __read_mostly = {
1824         .kind                   = "bridge",
1825         .priv_size              = sizeof(struct net_bridge),
1826         .setup                  = br_dev_setup,
1827         .maxtype                = IFLA_BR_MAX,
1828         .policy                 = br_policy,
1829         .validate               = br_validate,
1830         .newlink                = br_dev_newlink,
1831         .changelink             = br_changelink,
1832         .dellink                = br_dev_delete,
1833         .get_size               = br_get_size,
1834         .fill_info              = br_fill_info,
1835         .fill_linkxstats        = br_fill_linkxstats,
1836         .get_linkxstats_size    = br_get_linkxstats_size,
1837
1838         .slave_maxtype          = IFLA_BRPORT_MAX,
1839         .slave_policy           = br_port_policy,
1840         .slave_changelink       = br_port_slave_changelink,
1841         .get_slave_size         = br_port_get_slave_size,
1842         .fill_slave_info        = br_port_fill_slave_info,
1843 };
1844
1845 int __init br_netlink_init(void)
1846 {
1847         int err;
1848
1849         br_mdb_init();
1850         br_vlan_rtnl_init();
1851         rtnl_af_register(&br_af_ops);
1852
1853         err = rtnl_link_register(&br_link_ops);
1854         if (err)
1855                 goto out_af;
1856
1857         return 0;
1858
1859 out_af:
1860         rtnl_af_unregister(&br_af_ops);
1861         br_mdb_uninit();
1862         return err;
1863 }
1864
1865 void br_netlink_fini(void)
1866 {
1867         br_mdb_uninit();
1868         br_vlan_rtnl_uninit();
1869         rtnl_af_unregister(&br_af_ops);
1870         rtnl_link_unregister(&br_link_ops);
1871 }