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