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         if (af) {
 593                 if (nlmsg_get_pos(skb) - (void *)af > nla_attr_size(0))
 594                         nla_nest_end(skb, af);
 595                 else
 596                         nla_nest_cancel(skb, af);
 597         }
 598
 599         nlmsg_end(skb, nlh);
 600         return 0;
 601
 602 nla_put_failure:
 603         nlmsg_cancel(skb, nlh);
 604         return -EMSGSIZE;
 605 }
 606
 607 void br_info_notify(int event, const struct net_bridge *br,
 608                     const struct net_bridge_port *port, u32 filter)
 609 {
 610         struct net_device *dev;
 611         struct sk_buff *skb;
 612         int err = -ENOBUFS;
 613         struct net *net;
 614         u16 port_no = 0;
 615
 616         if (WARN_ON(!port && !br))
 617                 return;
 618
 619         if (port) {
 620                 dev = port->dev;
 621                 br = port->br;
 622                 port_no = port->port_no;
 623         } else {
 624                 dev = br->dev;
 625         }
 626
 627         net = dev_net(dev);
 628         br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
 629
 630         skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
 631         if (skb == NULL)
 632                 goto errout;
 633
 634         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev, false);
 635         if (err < 0) {
 636                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 637                 WARN_ON(err == -EMSGSIZE);
 638                 kfree_skb(skb);
 639                 goto errout;
 640         }
 641         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 642         return;
 643 errout:
 644         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 645 }
 646
 647 /* Notify listeners of a change in bridge or port information */
 648 void br_ifinfo_notify(int event, const struct net_bridge *br,
 649                       const struct net_bridge_port *port)
 650 {
 651         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 652
 653         return br_info_notify(event, br, port, filter);
 654 }
 655
 656 /*
 657  * Dump information about all ports, in response to GETLINK
 658  */
 659 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 660                struct net_device *dev, u32 filter_mask, int nlflags)
 661 {
 662         struct net_bridge_port *port = br_port_get_rtnl(dev);
 663
 664         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 665             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) &&
 666             !(filter_mask & RTEXT_FILTER_MRP) &&
 667             !(filter_mask & RTEXT_FILTER_CFM_CONFIG) &&
 668             !(filter_mask & RTEXT_FILTER_CFM_STATUS))
 669                 return 0;
 670
 671         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 672                               filter_mask, dev, true);
 673 }
 674
 675 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 676                         int cmd, struct bridge_vlan_info *vinfo, bool *changed,
 677                         struct netlink_ext_ack *extack)
 678 {
 679         bool curr_change;
 680         int err = 0;
 681
 682         switch (cmd) {
 683         case RTM_SETLINK:
 684                 if (p) {
 685                         /* if the MASTER flag is set this will act on the global
 686                          * per-VLAN entry as well
 687                          */
 688                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
 689                                            &curr_change, extack);
 690                 } else {
 691                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 692                         err = br_vlan_add(br, vinfo->vid, vinfo->flags,
 693                                           &curr_change, extack);
 694                 }
 695                 if (curr_change)
 696                         *changed = true;
 697                 break;
 698
 699         case RTM_DELLINK:
 700                 if (p) {
 701                         if (!nbp_vlan_delete(p, vinfo->vid))
 702                                 *changed = true;
 703
 704                         if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
 705                             !br_vlan_delete(p->br, vinfo->vid))
 706                                 *changed = true;
 707                 } else if (!br_vlan_delete(br, vinfo->vid)) {
 708                         *changed = true;
 709                 }
 710                 break;
 711         }
 712
 713         return err;
 714 }
 715
 716 int br_process_vlan_info(struct net_bridge *br,
 717                          struct net_bridge_port *p, int cmd,
 718                          struct bridge_vlan_info *vinfo_curr,
 719                          struct bridge_vlan_info **vinfo_last,
 720                          bool *changed,
 721                          struct netlink_ext_ack *extack)
 722 {
 723         int err, rtm_cmd;
 724
 725         if (!br_vlan_valid_id(vinfo_curr->vid, extack))
 726                 return -EINVAL;
 727
 728         /* needed for vlan-only NEWVLAN/DELVLAN notifications */
 729         rtm_cmd = br_afspec_cmd_to_rtm(cmd);
 730
 731         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 732                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 733                         return -EINVAL;
 734                 *vinfo_last = vinfo_curr;
 735                 return 0;
 736         }
 737
 738         if (*vinfo_last) {
 739                 struct bridge_vlan_info tmp_vinfo;
 740                 int v, v_change_start = 0;
 741
 742                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 743                         return -EINVAL;
 744
 745                 memcpy(&tmp_vinfo, *vinfo_last,
 746                        sizeof(struct bridge_vlan_info));
 747                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
 748                         bool curr_change = false;
 749
 750                         tmp_vinfo.vid = v;
 751                         err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change,
 752                                            extack);
 753                         if (err)
 754                                 break;
 755                         if (curr_change) {
 756                                 *changed = curr_change;
 757                                 if (!v_change_start)
 758                                         v_change_start = v;
 759                         } else {
 760                                 /* nothing to notify yet */
 761                                 if (!v_change_start)
 762                                         continue;
 763                                 br_vlan_notify(br, p, v_change_start,
 764                                                v - 1, rtm_cmd);
 765                                 v_change_start = 0;
 766                         }
 767                         cond_resched();
 768                 }
 769                 /* v_change_start is set only if the last/whole range changed */
 770                 if (v_change_start)
 771                         br_vlan_notify(br, p, v_change_start,
 772                                        v - 1, rtm_cmd);
 773
 774                 *vinfo_last = NULL;
 775
 776                 return err;
 777         }
 778
 779         err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
 780         if (*changed)
 781                 br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd);
 782
 783         return err;
 784 }
 785
 786 static int br_afspec(struct net_bridge *br,
 787                      struct net_bridge_port *p,
 788                      struct nlattr *af_spec,
 789                      int cmd, bool *changed,
 790                      struct netlink_ext_ack *extack)
 791 {
 792         struct bridge_vlan_info *vinfo_curr = NULL;
 793         struct bridge_vlan_info *vinfo_last = NULL;
 794         struct nlattr *attr;
 795         struct vtunnel_info tinfo_last = {};
 796         struct vtunnel_info tinfo_curr = {};
 797         int err = 0, rem;
 798
 799         nla_for_each_nested(attr, af_spec, rem) {
 800                 err = 0;
 801                 switch (nla_type(attr)) {
 802                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
 803                         if (!p || !(p->flags & BR_VLAN_TUNNEL))
 804                                 return -EINVAL;
 805                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
 806                         if (err)
 807                                 return err;
 808                         err = br_process_vlan_tunnel_info(br, p, cmd,
 809                                                           &tinfo_curr,
 810                                                           &tinfo_last,
 811                                                           changed);
 812                         if (err)
 813                                 return err;
 814                         break;
 815                 case IFLA_BRIDGE_VLAN_INFO:
 816                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 817                                 return -EINVAL;
 818                         vinfo_curr = nla_data(attr);
 819                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
 820                                                    &vinfo_last, changed,
 821                                                    extack);
 822                         if (err)
 823                                 return err;
 824                         break;
 825                 case IFLA_BRIDGE_MRP:
 826                         err = br_mrp_parse(br, p, attr, cmd, extack);
 827                         if (err)
 828                                 return err;
 829                         break;
 830                 case IFLA_BRIDGE_CFM:
 831                         err = br_cfm_parse(br, p, attr, cmd, extack);
 832                         if (err)
 833                                 return err;
 834                         break;
 835                 case IFLA_BRIDGE_MST:
 836                         if (!p) {
 837                                 NL_SET_ERR_MSG(extack,
 838                                                "MST states can only be set on bridge ports");
 839                                 return -EINVAL;
 840                         }
 841
 842                         if (cmd != RTM_SETLINK) {
 843                                 NL_SET_ERR_MSG(extack,
 844                                                "MST states can only be set through RTM_SETLINK");
 845                                 return -EINVAL;
 846                         }
 847
 848                         err = br_mst_process(p, attr, extack);
 849                         if (err)
 850                                 return err;
 851                         break;
 852                 }
 853         }
 854
 855         return err;
 856 }
 857
 858 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 859         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 860         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 861         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 862         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 863         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 864         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 865         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 866         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 867         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 868         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 869         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 870         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 871         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
 872         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
 873         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
 874         [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
 875         [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
 876         [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
 877         [IFLA_BRPORT_ISOLATED]  = { .type = NLA_U8 },
 878         [IFLA_BRPORT_LOCKED] = { .type = NLA_U8 },
 879         [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
 880         [IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT] = { .type = NLA_U32 },
 881 };
 882
 883 /* Change the state of the port and notify spanning tree */
 884 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 885 {
 886         if (state > BR_STATE_BLOCKING)
 887                 return -EINVAL;
 888
 889         /* if kernel STP is running, don't allow changes */
 890         if (p->br->stp_enabled == BR_KERNEL_STP)
 891                 return -EBUSY;
 892
 893         /* if device is not up, change is not allowed
 894          * if link is not present, only allowable state is disabled
 895          */
 896         if (!netif_running(p->dev) ||
 897             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 898                 return -ENETDOWN;
 899
 900         br_set_state(p, state);
 901         br_port_state_selection(p->br);
 902         return 0;
 903 }
 904
 905 /* Set/clear or port flags based on attribute */
 906 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 907                              int attrtype, unsigned long mask)
 908 {
 909         if (!tb[attrtype])
 910                 return;
 911
 912         if (nla_get_u8(tb[attrtype]))
 913                 p->flags |= mask;
 914         else
 915                 p->flags &= ~mask;
 916 }
 917
 918 /* Process bridge protocol info on port */
 919 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[],
 920                       struct netlink_ext_ack *extack)
 921 {
 922         unsigned long old_flags, changed_mask;
 923         bool br_vlan_tunnel_old;
 924         int err;
 925
 926         old_flags = p->flags;
 927         br_vlan_tunnel_old = (old_flags & BR_VLAN_TUNNEL) ? true : false;
 928
 929         br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 930         br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 931         br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE,
 932                          BR_MULTICAST_FAST_LEAVE);
 933         br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 934         br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 935         br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 936         br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
 937         br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST,
 938                          BR_MULTICAST_TO_UNICAST);
 939         br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
 940         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 941         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 942         br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
 943         br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS, BR_NEIGH_SUPPRESS);
 944         br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
 945         br_set_port_flag(p, tb, IFLA_BRPORT_LOCKED, BR_PORT_LOCKED);
 946
 947         changed_mask = old_flags ^ p->flags;
 948
 949         err = br_switchdev_set_port_flag(p, p->flags, changed_mask, extack);
 950         if (err) {
 951                 p->flags = old_flags;
 952                 return err;
 953         }
 954
 955         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
 956                 nbp_vlan_tunnel_info_flush(p);
 957
 958         br_port_flags_change(p, changed_mask);
 959
 960         if (tb[IFLA_BRPORT_COST]) {
 961                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 962                 if (err)
 963                         return err;
 964         }
 965
 966         if (tb[IFLA_BRPORT_PRIORITY]) {
 967                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 968                 if (err)
 969                         return err;
 970         }
 971
 972         if (tb[IFLA_BRPORT_STATE]) {
 973                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 974                 if (err)
 975                         return err;
 976         }
 977
 978         if (tb[IFLA_BRPORT_FLUSH])
 979                 br_fdb_delete_by_port(p->br, p, 0, 0);
 980
 981 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 982         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
 983                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
 984
 985                 err = br_multicast_set_port_router(&p->multicast_ctx,
 986                                                    mcast_router);
 987                 if (err)
 988                         return err;
 989         }
 990
 991         if (tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]) {
 992                 u32 hlimit;
 993
 994                 hlimit = nla_get_u32(tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]);
 995                 err = br_multicast_eht_set_hosts_limit(p, hlimit);
 996                 if (err)
 997                         return err;
 998         }
 999 #endif
1000
1001         if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
1002                 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
1003
1004                 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
1005                         return -EINVAL;
1006                 p->group_fwd_mask = fwd_mask;
1007         }
1008
1009         if (tb[IFLA_BRPORT_BACKUP_PORT]) {
1010                 struct net_device *backup_dev = NULL;
1011                 u32 backup_ifindex;
1012
1013                 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
1014                 if (backup_ifindex) {
1015                         backup_dev = __dev_get_by_index(dev_net(p->dev),
1016                                                         backup_ifindex);
1017                         if (!backup_dev)
1018                                 return -ENOENT;
1019                 }
1020
1021                 err = nbp_backup_change(p, backup_dev);
1022                 if (err)
1023                         return err;
1024         }
1025
1026         return 0;
1027 }
1028
1029 /* Change state and parameters on port. */
1030 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags,
1031                struct netlink_ext_ack *extack)
1032 {
1033         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
1034         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
1035         struct net_bridge_port *p;
1036         struct nlattr *protinfo;
1037         struct nlattr *afspec;
1038         bool changed = false;
1039         int err = 0;
1040
1041         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
1042         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
1043         if (!protinfo && !afspec)
1044                 return 0;
1045
1046         p = br_port_get_rtnl(dev);
1047         /* We want to accept dev as bridge itself if the AF_SPEC
1048          * is set to see if someone is setting vlan info on the bridge
1049          */
1050         if (!p && !afspec)
1051                 return -EINVAL;
1052
1053         if (p && protinfo) {
1054                 if (protinfo->nla_type & NLA_F_NESTED) {
1055                         err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX,
1056                                                           protinfo,
1057                                                           br_port_policy,
1058                                                           NULL);
1059                         if (err)
1060                                 return err;
1061
1062                         spin_lock_bh(&p->br->lock);
1063                         err = br_setport(p, tb, extack);
1064                         spin_unlock_bh(&p->br->lock);
1065                 } else {
1066                         /* Binary compatibility with old RSTP */
1067                         if (nla_len(protinfo) < sizeof(u8))
1068                                 return -EINVAL;
1069
1070                         spin_lock_bh(&p->br->lock);
1071                         err = br_set_port_state(p, nla_get_u8(protinfo));
1072                         spin_unlock_bh(&p->br->lock);
1073                 }
1074                 if (err)
1075                         goto out;
1076                 changed = true;
1077         }
1078
1079         if (afspec)
1080                 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
1081
1082         if (changed)
1083                 br_ifinfo_notify(RTM_NEWLINK, br, p);
1084 out:
1085         return err;
1086 }
1087
1088 /* Delete port information */
1089 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
1090 {
1091         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
1092         struct net_bridge_port *p;
1093         struct nlattr *afspec;
1094         bool changed = false;
1095         int err = 0;
1096
1097         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
1098         if (!afspec)
1099                 return 0;
1100
1101         p = br_port_get_rtnl(dev);
1102         /* We want to accept dev as bridge itself as well */
1103         if (!p && !netif_is_bridge_master(dev))
1104                 return -EINVAL;
1105
1106         err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL);
1107         if (changed)
1108                 /* Send RTM_NEWLINK because userspace
1109                  * expects RTM_NEWLINK for vlan dels
1110                  */
1111                 br_ifinfo_notify(RTM_NEWLINK, br, p);
1112
1113         return err;
1114 }
1115
1116 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
1117                        struct netlink_ext_ack *extack)
1118 {
1119         if (tb[IFLA_ADDRESS]) {
1120                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1121                         return -EINVAL;
1122                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1123                         return -EADDRNOTAVAIL;
1124         }
1125
1126         if (!data)
1127                 return 0;
1128
1129 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1130         if (data[IFLA_BR_VLAN_PROTOCOL] &&
1131             !eth_type_vlan(nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])))
1132                 return -EPROTONOSUPPORT;
1133
1134         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1135                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1136
1137                 if (defpvid >= VLAN_VID_MASK)
1138                         return -EINVAL;
1139         }
1140 #endif
1141
1142         return 0;
1143 }
1144
1145 static int br_port_slave_changelink(struct net_device *brdev,
1146                                     struct net_device *dev,
1147                                     struct nlattr *tb[],
1148                                     struct nlattr *data[],
1149                                     struct netlink_ext_ack *extack)
1150 {
1151         struct net_bridge *br = netdev_priv(brdev);
1152         int ret;
1153
1154         if (!data)
1155                 return 0;
1156
1157         spin_lock_bh(&br->lock);
1158         ret = br_setport(br_port_get_rtnl(dev), data, extack);
1159         spin_unlock_bh(&br->lock);
1160
1161         return ret;
1162 }
1163
1164 static int br_port_fill_slave_info(struct sk_buff *skb,
1165                                    const struct net_device *brdev,
1166                                    const struct net_device *dev)
1167 {
1168         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
1169 }
1170
1171 static size_t br_port_get_slave_size(const struct net_device *brdev,
1172                                      const struct net_device *dev)
1173 {
1174         return br_port_info_size();
1175 }
1176
1177 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1178         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1179         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
1180         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
1181         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1182         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1183         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1184         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1185         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1186         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1187         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1188                                  .len  = ETH_ALEN },
1189         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1190         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1191         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1192         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1193         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1194         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1195         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1196         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1197         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1198         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1199         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1200         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1201         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1202         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1203         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1204         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1205         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1206         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1207         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1208         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1209         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1210         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1211         [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1212         [IFLA_BR_MULTI_BOOLOPT] =
1213                 NLA_POLICY_EXACT_LEN(sizeof(struct br_boolopt_multi)),
1214 };
1215
1216 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1217                          struct nlattr *data[],
1218                          struct netlink_ext_ack *extack)
1219 {
1220         struct net_bridge *br = netdev_priv(brdev);
1221         int err;
1222
1223         if (!data)
1224                 return 0;
1225
1226         if (data[IFLA_BR_FORWARD_DELAY]) {
1227                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1228                 if (err)
1229                         return err;
1230         }
1231
1232         if (data[IFLA_BR_HELLO_TIME]) {
1233                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1234                 if (err)
1235                         return err;
1236         }
1237
1238         if (data[IFLA_BR_MAX_AGE]) {
1239                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1240                 if (err)
1241                         return err;
1242         }
1243
1244         if (data[IFLA_BR_AGEING_TIME]) {
1245                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1246                 if (err)
1247                         return err;
1248         }
1249
1250         if (data[IFLA_BR_STP_STATE]) {
1251                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1252
1253                 err = br_stp_set_enabled(br, stp_enabled, extack);
1254                 if (err)
1255                         return err;
1256         }
1257
1258         if (data[IFLA_BR_PRIORITY]) {
1259                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1260
1261                 br_stp_set_bridge_priority(br, priority);
1262         }
1263
1264         if (data[IFLA_BR_VLAN_FILTERING]) {
1265                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1266
1267                 err = br_vlan_filter_toggle(br, vlan_filter, extack);
1268                 if (err)
1269                         return err;
1270         }
1271
1272 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1273         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1274                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1275
1276                 err = __br_vlan_set_proto(br, vlan_proto, extack);
1277                 if (err)
1278                         return err;
1279         }
1280
1281         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1282                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1283
1284                 err = __br_vlan_set_default_pvid(br, defpvid, extack);
1285                 if (err)
1286                         return err;
1287         }
1288
1289         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1290                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1291
1292                 err = br_vlan_set_stats(br, vlan_stats);
1293                 if (err)
1294                         return err;
1295         }
1296
1297         if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1298                 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1299
1300                 err = br_vlan_set_stats_per_port(br, per_port);
1301                 if (err)
1302                         return err;
1303         }
1304 #endif
1305
1306         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1307                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1308
1309                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1310                         return -EINVAL;
1311                 br->group_fwd_mask = fwd_mask;
1312         }
1313
1314         if (data[IFLA_BR_GROUP_ADDR]) {
1315                 u8 new_addr[ETH_ALEN];
1316
1317                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1318                         return -EINVAL;
1319                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1320                 if (!is_link_local_ether_addr(new_addr))
1321                         return -EINVAL;
1322                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1323                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1324                     new_addr[5] == 3)           /* 802.1X PAE address */
1325                         return -EINVAL;
1326                 spin_lock_bh(&br->lock);
1327                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1328                 spin_unlock_bh(&br->lock);
1329                 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1330                 br_recalculate_fwd_mask(br);
1331         }
1332
1333         if (data[IFLA_BR_FDB_FLUSH]) {
1334                 struct net_bridge_fdb_flush_desc desc = {
1335                         .flags_mask = BR_FDB_STATIC
1336                 };
1337
1338                 br_fdb_flush(br, &desc);
1339         }
1340
1341 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1342         if (data[IFLA_BR_MCAST_ROUTER]) {
1343                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1344
1345                 err = br_multicast_set_router(&br->multicast_ctx,
1346                                               multicast_router);
1347                 if (err)
1348                         return err;
1349         }
1350
1351         if (data[IFLA_BR_MCAST_SNOOPING]) {
1352                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1353
1354                 err = br_multicast_toggle(br, mcast_snooping, extack);
1355                 if (err)
1356                         return err;
1357         }
1358
1359         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1360                 u8 val;
1361
1362                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1363                 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1364         }
1365
1366         if (data[IFLA_BR_MCAST_QUERIER]) {
1367                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1368
1369                 err = br_multicast_set_querier(&br->multicast_ctx,
1370                                                mcast_querier);
1371                 if (err)
1372                         return err;
1373         }
1374
1375         if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
1376                 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
1377                         RHT_ELASTICITY);
1378
1379         if (data[IFLA_BR_MCAST_HASH_MAX])
1380                 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1381
1382         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1383                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1384
1385                 br->multicast_ctx.multicast_last_member_count = val;
1386         }
1387
1388         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1389                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1390
1391                 br->multicast_ctx.multicast_startup_query_count = val;
1392         }
1393
1394         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1395                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1396
1397                 br->multicast_ctx.multicast_last_member_interval = clock_t_to_jiffies(val);
1398         }
1399
1400         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1401                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1402
1403                 br->multicast_ctx.multicast_membership_interval = clock_t_to_jiffies(val);
1404         }
1405
1406         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1407                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1408
1409                 br->multicast_ctx.multicast_querier_interval = clock_t_to_jiffies(val);
1410         }
1411
1412         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1413                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1414
1415                 br_multicast_set_query_intvl(&br->multicast_ctx, val);
1416         }
1417
1418         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1419                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1420
1421                 br->multicast_ctx.multicast_query_response_interval = clock_t_to_jiffies(val);
1422         }
1423
1424         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1425                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1426
1427                 br_multicast_set_startup_query_intvl(&br->multicast_ctx, val);
1428         }
1429
1430         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1431                 __u8 mcast_stats;
1432
1433                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1434                 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1435         }
1436
1437         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1438                 __u8 igmp_version;
1439
1440                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1441                 err = br_multicast_set_igmp_version(&br->multicast_ctx,
1442                                                     igmp_version);
1443                 if (err)
1444                         return err;
1445         }
1446
1447 #if IS_ENABLED(CONFIG_IPV6)
1448         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1449                 __u8 mld_version;
1450
1451                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1452                 err = br_multicast_set_mld_version(&br->multicast_ctx,
1453                                                    mld_version);
1454                 if (err)
1455                         return err;
1456         }
1457 #endif
1458 #endif
1459 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1460         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1461                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1462
1463                 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1464         }
1465
1466         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1467                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1468
1469                 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1470         }
1471
1472         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1473                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1474
1475                 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1476         }
1477 #endif
1478
1479         if (data[IFLA_BR_MULTI_BOOLOPT]) {
1480                 struct br_boolopt_multi *bm;
1481
1482                 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
1483                 err = br_boolopt_multi_toggle(br, bm, extack);
1484                 if (err)
1485                         return err;
1486         }
1487
1488         return 0;
1489 }
1490
1491 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1492                           struct nlattr *tb[], struct nlattr *data[],
1493                           struct netlink_ext_ack *extack)
1494 {
1495         struct net_bridge *br = netdev_priv(dev);
1496         int err;
1497
1498         err = register_netdevice(dev);
1499         if (err)
1500                 return err;
1501
1502         if (tb[IFLA_ADDRESS]) {
1503                 spin_lock_bh(&br->lock);
1504                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1505                 spin_unlock_bh(&br->lock);
1506         }
1507
1508         err = br_changelink(dev, tb, data, extack);
1509         if (err)
1510                 br_dev_delete(dev, NULL);
1511
1512         return err;
1513 }
1514
1515 static size_t br_get_size(const struct net_device *brdev)
1516 {
1517         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1518                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1519                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1520                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1521                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1522                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1523                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1524 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1525                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1526                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1527                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1528                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_PER_PORT */
1529 #endif
1530                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1531                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1532                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1533                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1534                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1535                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1536                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1537                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1538                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1539                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1540                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1541                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1542 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1543                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1544                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1545                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1546                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1547                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1548                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1549                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1550                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1551                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1552                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1553                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1554                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1555                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1556                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1557                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1558                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1559                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1560                br_multicast_querier_state_size() + /* IFLA_BR_MCAST_QUERIER_STATE */
1561 #endif
1562 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1563                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1564                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1565                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1566 #endif
1567                nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
1568                0;
1569 }
1570
1571 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1572 {
1573         struct net_bridge *br = netdev_priv(brdev);
1574         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1575         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1576         u32 age_time = jiffies_to_clock_t(br->max_age);
1577         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1578         u32 stp_enabled = br->stp_enabled;
1579         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1580         u8 vlan_enabled = br_vlan_enabled(br->dev);
1581         struct br_boolopt_multi bm;
1582         u64 clockval;
1583
1584         clockval = br_timer_value(&br->hello_timer);
1585         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1586                 return -EMSGSIZE;
1587         clockval = br_timer_value(&br->tcn_timer);
1588         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1589                 return -EMSGSIZE;
1590         clockval = br_timer_value(&br->topology_change_timer);
1591         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1592                               IFLA_BR_PAD))
1593                 return -EMSGSIZE;
1594         clockval = br_timer_value(&br->gc_work.timer);
1595         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1596                 return -EMSGSIZE;
1597
1598         br_boolopt_multi_get(br, &bm);
1599         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1600             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1601             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1602             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1603             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1604             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1605             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1606             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1607             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1608                     &br->bridge_id) ||
1609             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1610                     &br->designated_root) ||
1611             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1612             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1613             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1614             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1615                        br->topology_change_detected) ||
1616             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
1617             nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
1618                 return -EMSGSIZE;
1619
1620 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1621         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1622             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1623             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1624                        br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1625             nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1626                        br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)))
1627                 return -EMSGSIZE;
1628 #endif
1629 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1630         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER,
1631                        br->multicast_ctx.multicast_router) ||
1632             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1633                        br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1634             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1635                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1636             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1637                        br->multicast_ctx.multicast_querier) ||
1638             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1639                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1640             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
1641             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1642             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1643                         br->multicast_ctx.multicast_last_member_count) ||
1644             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1645                         br->multicast_ctx.multicast_startup_query_count) ||
1646             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1647                        br->multicast_ctx.multicast_igmp_version) ||
1648             br_multicast_dump_querier_state(skb, &br->multicast_ctx,
1649                                             IFLA_BR_MCAST_QUERIER_STATE))
1650                 return -EMSGSIZE;
1651 #if IS_ENABLED(CONFIG_IPV6)
1652         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1653                        br->multicast_ctx.multicast_mld_version))
1654                 return -EMSGSIZE;
1655 #endif
1656         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_last_member_interval);
1657         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1658                               IFLA_BR_PAD))
1659                 return -EMSGSIZE;
1660         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_membership_interval);
1661         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1662                               IFLA_BR_PAD))
1663                 return -EMSGSIZE;
1664         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_querier_interval);
1665         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1666                               IFLA_BR_PAD))
1667                 return -EMSGSIZE;
1668         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_interval);
1669         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1670                               IFLA_BR_PAD))
1671                 return -EMSGSIZE;
1672         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_response_interval);
1673         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1674                               IFLA_BR_PAD))
1675                 return -EMSGSIZE;
1676         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_startup_query_interval);
1677         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1678                               IFLA_BR_PAD))
1679                 return -EMSGSIZE;
1680 #endif
1681 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1682         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1683                        br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1684             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1685                        br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1686             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1687                        br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1688                 return -EMSGSIZE;
1689 #endif
1690
1691         return 0;
1692 }
1693
1694 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1695 {
1696         struct net_bridge_port *p = NULL;
1697         struct net_bridge_vlan_group *vg;
1698         struct net_bridge_vlan *v;
1699         struct net_bridge *br;
1700         int numvls = 0;
1701
1702         switch (attr) {
1703         case IFLA_STATS_LINK_XSTATS:
1704                 br = netdev_priv(dev);
1705                 vg = br_vlan_group(br);
1706                 break;
1707         case IFLA_STATS_LINK_XSTATS_SLAVE:
1708                 p = br_port_get_rtnl(dev);
1709                 if (!p)
1710                         return 0;
1711                 vg = nbp_vlan_group(p);
1712                 break;
1713         default:
1714                 return 0;
1715         }
1716
1717         if (vg) {
1718                 /* we need to count all, even placeholder entries */
1719                 list_for_each_entry(v, &vg->vlan_list, vlist)
1720                         numvls++;
1721         }
1722
1723         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1724                nla_total_size_64bit(sizeof(struct br_mcast_stats)) +
1725                (p ? nla_total_size_64bit(sizeof(p->stp_xstats)) : 0) +
1726                nla_total_size(0);
1727 }
1728
1729 static int br_fill_linkxstats(struct sk_buff *skb,
1730                               const struct net_device *dev,
1731                               int *prividx, int attr)
1732 {
1733         struct nlattr *nla __maybe_unused;
1734         struct net_bridge_port *p = NULL;
1735         struct net_bridge_vlan_group *vg;
1736         struct net_bridge_vlan *v;
1737         struct net_bridge *br;
1738         struct nlattr *nest;
1739         int vl_idx = 0;
1740
1741         switch (attr) {
1742         case IFLA_STATS_LINK_XSTATS:
1743                 br = netdev_priv(dev);
1744                 vg = br_vlan_group(br);
1745                 break;
1746         case IFLA_STATS_LINK_XSTATS_SLAVE:
1747                 p = br_port_get_rtnl(dev);
1748                 if (!p)
1749                         return 0;
1750                 br = p->br;
1751                 vg = nbp_vlan_group(p);
1752                 break;
1753         default:
1754                 return -EINVAL;
1755         }
1756
1757         nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE);
1758         if (!nest)
1759                 return -EMSGSIZE;
1760
1761         if (vg) {
1762                 u16 pvid;
1763
1764                 pvid = br_get_pvid(vg);
1765                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1766                         struct bridge_vlan_xstats vxi;
1767                         struct pcpu_sw_netstats stats;
1768
1769                         if (++vl_idx < *prividx)
1770                                 continue;
1771                         memset(&vxi, 0, sizeof(vxi));
1772                         vxi.vid = v->vid;
1773                         vxi.flags = v->flags;
1774                         if (v->vid == pvid)
1775                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1776                         br_vlan_get_stats(v, &stats);
1777                         vxi.rx_bytes = u64_stats_read(&stats.rx_bytes);
1778                         vxi.rx_packets = u64_stats_read(&stats.rx_packets);
1779                         vxi.tx_bytes = u64_stats_read(&stats.tx_bytes);
1780                         vxi.tx_packets = u64_stats_read(&stats.tx_packets);
1781
1782                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1783                                 goto nla_put_failure;
1784                 }
1785         }
1786
1787 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1788         if (++vl_idx >= *prividx) {
1789                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1790                                         sizeof(struct br_mcast_stats),
1791                                         BRIDGE_XSTATS_PAD);
1792                 if (!nla)
1793                         goto nla_put_failure;
1794                 br_multicast_get_stats(br, p, nla_data(nla));
1795         }
1796 #endif
1797
1798         if (p) {
1799                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP,
1800                                         sizeof(p->stp_xstats),
1801                                         BRIDGE_XSTATS_PAD);
1802                 if (!nla)
1803                         goto nla_put_failure;
1804
1805                 spin_lock_bh(&br->lock);
1806                 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats));
1807                 spin_unlock_bh(&br->lock);
1808         }
1809
1810         nla_nest_end(skb, nest);
1811         *prividx = 0;
1812
1813         return 0;
1814
1815 nla_put_failure:
1816         nla_nest_end(skb, nest);
1817         *prividx = vl_idx;
1818
1819         return -EMSGSIZE;
1820 }
1821
1822 static struct rtnl_af_ops br_af_ops __read_mostly = {
1823         .family                 = AF_BRIDGE,
1824         .get_link_af_size       = br_get_link_af_size_filtered,
1825 };
1826
1827 struct rtnl_link_ops br_link_ops __read_mostly = {
1828         .kind                   = "bridge",
1829         .priv_size              = sizeof(struct net_bridge),
1830         .setup                  = br_dev_setup,
1831         .maxtype                = IFLA_BR_MAX,
1832         .policy                 = br_policy,
1833         .validate               = br_validate,
1834         .newlink                = br_dev_newlink,
1835         .changelink             = br_changelink,
1836         .dellink                = br_dev_delete,
1837         .get_size               = br_get_size,
1838         .fill_info              = br_fill_info,
1839         .fill_linkxstats        = br_fill_linkxstats,
1840         .get_linkxstats_size    = br_get_linkxstats_size,
1841
1842         .slave_maxtype          = IFLA_BRPORT_MAX,
1843         .slave_policy           = br_port_policy,
1844         .slave_changelink       = br_port_slave_changelink,
1845         .get_slave_size         = br_port_get_slave_size,
1846         .fill_slave_info        = br_port_fill_slave_info,
1847 };
1848
1849 int __init br_netlink_init(void)
1850 {
1851         int err;
1852
1853         br_mdb_init();
1854         br_vlan_rtnl_init();
1855         rtnl_af_register(&br_af_ops);
1856
1857         err = rtnl_link_register(&br_link_ops);
1858         if (err)
1859                 goto out_af;
1860
1861         return 0;
1862
1863 out_af:
1864         rtnl_af_unregister(&br_af_ops);
1865         br_mdb_uninit();
1866         return err;
1867 }
1868
1869 void br_netlink_fini(void)
1870 {
1871         br_mdb_uninit();
1872         br_vlan_rtnl_uninit();
1873         rtnl_af_unregister(&br_af_ops);
1874         rtnl_link_unregister(&br_link_ops);
1875 }