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(1)     /* IFLA_BRPORT_MAB */
 192                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
 193                 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
 194                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_PORT */
 195                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_DESIGNATED_COST */
 196                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_ID */
 197                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_NO */
 198                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
 199                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_CONFIG_PENDING */
 200                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
 201                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
 202                 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
 203 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 204                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MULTICAST_ROUTER */
 205 #endif
 206                 + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_GROUP_FWD_MASK */
 207                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MRP_RING_OPEN */
 208                 + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MRP_IN_OPEN */
 209                 + nla_total_size(sizeof(u32))   /* IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT */
 210                 + nla_total_size(sizeof(u32))   /* IFLA_BRPORT_MCAST_EHT_HOSTS_CNT */
 211                 + 0;
 212 }
 213
 214 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
 215 {
 216         return NLMSG_ALIGN(sizeof(struct ifinfomsg))
 217                 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
 218                 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
 219                 + nla_total_size(4) /* IFLA_MASTER */
 220                 + nla_total_size(4) /* IFLA_MTU */
 221                 + nla_total_size(4) /* IFLA_LINK */
 222                 + nla_total_size(1) /* IFLA_OPERSTATE */
 223                 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
 224                 + nla_total_size(br_get_link_af_size_filtered(dev,
 225                                  filter_mask)) /* IFLA_AF_SPEC */
 226                 + nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */
 227 }
 228
 229 static int br_port_fill_attrs(struct sk_buff *skb,
 230                               const struct net_bridge_port *p)
 231 {
 232         u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
 233         struct net_bridge_port *backup_p;
 234         u64 timerval;
 235
 236         if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
 237             nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
 238             nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
 239             nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
 240             nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
 241             nla_put_u8(skb, IFLA_BRPORT_PROTECT,
 242                        !!(p->flags & BR_ROOT_BLOCK)) ||
 243             nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
 244                        !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
 245             nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
 246                        !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
 247             nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
 248             nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
 249                        !!(p->flags & BR_FLOOD)) ||
 250             nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
 251                        !!(p->flags & BR_MCAST_FLOOD)) ||
 252             nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD,
 253                        !!(p->flags & BR_BCAST_FLOOD)) ||
 254             nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
 255             nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
 256                        !!(p->flags & BR_PROXYARP_WIFI)) ||
 257             nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
 258                     &p->designated_root) ||
 259             nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
 260                     &p->designated_bridge) ||
 261             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
 262             nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
 263             nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
 264             nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
 265             nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
 266                        p->topology_change_ack) ||
 267             nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) ||
 268             nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
 269                                                         BR_VLAN_TUNNEL)) ||
 270             nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
 271             nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
 272                        !!(p->flags & BR_NEIGH_SUPPRESS)) ||
 273             nla_put_u8(skb, IFLA_BRPORT_MRP_RING_OPEN, !!(p->flags &
 274                                                           BR_MRP_LOST_CONT)) ||
 275             nla_put_u8(skb, IFLA_BRPORT_MRP_IN_OPEN,
 276                        !!(p->flags & BR_MRP_LOST_IN_CONT)) ||
 277             nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)) ||
 278             nla_put_u8(skb, IFLA_BRPORT_LOCKED, !!(p->flags & BR_PORT_LOCKED)) ||
 279             nla_put_u8(skb, IFLA_BRPORT_MAB, !!(p->flags & BR_PORT_MAB)))
 280                 return -EMSGSIZE;
 281
 282         timerval = br_timer_value(&p->message_age_timer);
 283         if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
 284                               IFLA_BRPORT_PAD))
 285                 return -EMSGSIZE;
 286         timerval = br_timer_value(&p->forward_delay_timer);
 287         if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
 288                               IFLA_BRPORT_PAD))
 289                 return -EMSGSIZE;
 290         timerval = br_timer_value(&p->hold_timer);
 291         if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
 292                               IFLA_BRPORT_PAD))
 293                 return -EMSGSIZE;
 294
 295 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 296         if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
 297                        p->multicast_ctx.multicast_router) ||
 298             nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT,
 299                         p->multicast_eht_hosts_limit) ||
 300             nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_CNT,
 301                         p->multicast_eht_hosts_cnt))
 302                 return -EMSGSIZE;
 303 #endif
 304
 305         /* we might be called only with br->lock */
 306         rcu_read_lock();
 307         backup_p = rcu_dereference(p->backup_port);
 308         if (backup_p)
 309                 nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT,
 310                             backup_p->dev->ifindex);
 311         rcu_read_unlock();
 312
 313         return 0;
 314 }
 315
 316 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
 317                                     u16 vid_end, u16 flags)
 318 {
 319         struct  bridge_vlan_info vinfo;
 320
 321         if ((vid_end - vid_start) > 0) {
 322                 /* add range to skb */
 323                 vinfo.vid = vid_start;
 324                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
 325                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 326                             sizeof(vinfo), &vinfo))
 327                         goto nla_put_failure;
 328
 329                 vinfo.vid = vid_end;
 330                 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
 331                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 332                             sizeof(vinfo), &vinfo))
 333                         goto nla_put_failure;
 334         } else {
 335                 vinfo.vid = vid_start;
 336                 vinfo.flags = flags;
 337                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 338                             sizeof(vinfo), &vinfo))
 339                         goto nla_put_failure;
 340         }
 341
 342         return 0;
 343
 344 nla_put_failure:
 345         return -EMSGSIZE;
 346 }
 347
 348 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
 349                                          struct net_bridge_vlan_group *vg)
 350 {
 351         struct net_bridge_vlan *v;
 352         u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
 353         u16 flags, pvid;
 354         int err = 0;
 355
 356         /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
 357          * and mark vlan info with begin and end flags
 358          * if vlaninfo represents a range
 359          */
 360         pvid = br_get_pvid(vg);
 361         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 362                 flags = 0;
 363                 if (!br_vlan_should_use(v))
 364                         continue;
 365                 if (v->vid == pvid)
 366                         flags |= BRIDGE_VLAN_INFO_PVID;
 367
 368                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 369                         flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 370
 371                 if (vid_range_start == 0) {
 372                         goto initvars;
 373                 } else if ((v->vid - vid_range_end) == 1 &&
 374                         flags == vid_range_flags) {
 375                         vid_range_end = v->vid;
 376                         continue;
 377                 } else {
 378                         err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 379                                                        vid_range_end,
 380                                                        vid_range_flags);
 381                         if (err)
 382                                 return err;
 383                 }
 384
 385 initvars:
 386                 vid_range_start = v->vid;
 387                 vid_range_end = v->vid;
 388                 vid_range_flags = flags;
 389         }
 390
 391         if (vid_range_start != 0) {
 392                 /* Call it once more to send any left over vlans */
 393                 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
 394                                                vid_range_end,
 395                                                vid_range_flags);
 396                 if (err)
 397                         return err;
 398         }
 399
 400         return 0;
 401 }
 402
 403 static int br_fill_ifvlaninfo(struct sk_buff *skb,
 404                               struct net_bridge_vlan_group *vg)
 405 {
 406         struct bridge_vlan_info vinfo;
 407         struct net_bridge_vlan *v;
 408         u16 pvid;
 409
 410         pvid = br_get_pvid(vg);
 411         list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
 412                 if (!br_vlan_should_use(v))
 413                         continue;
 414
 415                 vinfo.vid = v->vid;
 416                 vinfo.flags = 0;
 417                 if (v->vid == pvid)
 418                         vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
 419
 420                 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 421                         vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 422
 423                 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
 424                             sizeof(vinfo), &vinfo))
 425                         goto nla_put_failure;
 426         }
 427
 428         return 0;
 429
 430 nla_put_failure:
 431         return -EMSGSIZE;
 432 }
 433
 434 /*
 435  * Create one netlink message for one interface
 436  * Contains port and master info as well as carrier and bridge state.
 437  */
 438 static int br_fill_ifinfo(struct sk_buff *skb,
 439                           const struct net_bridge_port *port,
 440                           u32 pid, u32 seq, int event, unsigned int flags,
 441                           u32 filter_mask, const struct net_device *dev,
 442                           bool getlink)
 443 {
 444         u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
 445         struct nlattr *af = NULL;
 446         struct net_bridge *br;
 447         struct ifinfomsg *hdr;
 448         struct nlmsghdr *nlh;
 449
 450         if (port)
 451                 br = port->br;
 452         else
 453                 br = netdev_priv(dev);
 454
 455         br_debug(br, "br_fill_info event %d port %s master %s\n",
 456                      event, dev->name, br->dev->name);
 457
 458         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
 459         if (nlh == NULL)
 460                 return -EMSGSIZE;
 461
 462         hdr = nlmsg_data(nlh);
 463         hdr->ifi_family = AF_BRIDGE;
 464         hdr->__ifi_pad = 0;
 465         hdr->ifi_type = dev->type;
 466         hdr->ifi_index = dev->ifindex;
 467         hdr->ifi_flags = dev_get_flags(dev);
 468         hdr->ifi_change = 0;
 469
 470         if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
 471             nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
 472             nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
 473             nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
 474             (dev->addr_len &&
 475              nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
 476             (dev->ifindex != dev_get_iflink(dev) &&
 477              nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
 478                 goto nla_put_failure;
 479
 480         if (event == RTM_NEWLINK && port) {
 481                 struct nlattr *nest;
 482
 483                 nest = nla_nest_start(skb, IFLA_PROTINFO);
 484                 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
 485                         goto nla_put_failure;
 486                 nla_nest_end(skb, nest);
 487         }
 488
 489         if (filter_mask & (RTEXT_FILTER_BRVLAN |
 490                            RTEXT_FILTER_BRVLAN_COMPRESSED |
 491                            RTEXT_FILTER_MRP |
 492                            RTEXT_FILTER_CFM_CONFIG |
 493                            RTEXT_FILTER_CFM_STATUS |
 494                            RTEXT_FILTER_MST)) {
 495                 af = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
 496                 if (!af)
 497                         goto nla_put_failure;
 498         }
 499
 500         /* Check if  the VID information is requested */
 501         if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
 502             (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
 503                 struct net_bridge_vlan_group *vg;
 504                 int err;
 505
 506                 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
 507                 rcu_read_lock();
 508                 if (port)
 509                         vg = nbp_vlan_group_rcu(port);
 510                 else
 511                         vg = br_vlan_group_rcu(br);
 512
 513                 if (!vg || !vg->num_vlans) {
 514                         rcu_read_unlock();
 515                         goto done;
 516                 }
 517                 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
 518                         err = br_fill_ifvlaninfo_compressed(skb, vg);
 519                 else
 520                         err = br_fill_ifvlaninfo(skb, vg);
 521
 522                 if (port && (port->flags & BR_VLAN_TUNNEL))
 523                         err = br_fill_vlan_tunnel_info(skb, vg);
 524                 rcu_read_unlock();
 525                 if (err)
 526                         goto nla_put_failure;
 527         }
 528
 529         if (filter_mask & RTEXT_FILTER_MRP) {
 530                 int err;
 531
 532                 if (!br_mrp_enabled(br) || port)
 533                         goto done;
 534
 535                 rcu_read_lock();
 536                 err = br_mrp_fill_info(skb, br);
 537                 rcu_read_unlock();
 538
 539                 if (err)
 540                         goto nla_put_failure;
 541         }
 542
 543         if (filter_mask & (RTEXT_FILTER_CFM_CONFIG | RTEXT_FILTER_CFM_STATUS)) {
 544                 struct nlattr *cfm_nest = NULL;
 545                 int err;
 546
 547                 if (!br_cfm_created(br) || port)
 548                         goto done;
 549
 550                 cfm_nest = nla_nest_start(skb, IFLA_BRIDGE_CFM);
 551                 if (!cfm_nest)
 552                         goto nla_put_failure;
 553
 554                 if (filter_mask & RTEXT_FILTER_CFM_CONFIG) {
 555                         rcu_read_lock();
 556                         err = br_cfm_config_fill_info(skb, br);
 557                         rcu_read_unlock();
 558                         if (err)
 559                                 goto nla_put_failure;
 560                 }
 561
 562                 if (filter_mask & RTEXT_FILTER_CFM_STATUS) {
 563                         rcu_read_lock();
 564                         err = br_cfm_status_fill_info(skb, br, getlink);
 565                         rcu_read_unlock();
 566                         if (err)
 567                                 goto nla_put_failure;
 568                 }
 569
 570                 nla_nest_end(skb, cfm_nest);
 571         }
 572
 573         if ((filter_mask & RTEXT_FILTER_MST) &&
 574             br_opt_get(br, BROPT_MST_ENABLED) && port) {
 575                 const struct net_bridge_vlan_group *vg = nbp_vlan_group(port);
 576                 struct nlattr *mst_nest;
 577                 int err;
 578
 579                 if (!vg || !vg->num_vlans)
 580                         goto done;
 581
 582                 mst_nest = nla_nest_start(skb, IFLA_BRIDGE_MST);
 583                 if (!mst_nest)
 584                         goto nla_put_failure;
 585
 586                 err = br_mst_fill_info(skb, vg);
 587                 if (err)
 588                         goto nla_put_failure;
 589
 590                 nla_nest_end(skb, mst_nest);
 591         }
 592
 593 done:
 594         if (af) {
 595                 if (nlmsg_get_pos(skb) - (void *)af > nla_attr_size(0))
 596                         nla_nest_end(skb, af);
 597                 else
 598                         nla_nest_cancel(skb, af);
 599         }
 600
 601         nlmsg_end(skb, nlh);
 602         return 0;
 603
 604 nla_put_failure:
 605         nlmsg_cancel(skb, nlh);
 606         return -EMSGSIZE;
 607 }
 608
 609 void br_info_notify(int event, const struct net_bridge *br,
 610                     const struct net_bridge_port *port, u32 filter)
 611 {
 612         struct net_device *dev;
 613         struct sk_buff *skb;
 614         int err = -ENOBUFS;
 615         struct net *net;
 616         u16 port_no = 0;
 617
 618         if (WARN_ON(!port && !br))
 619                 return;
 620
 621         if (port) {
 622                 dev = port->dev;
 623                 br = port->br;
 624                 port_no = port->port_no;
 625         } else {
 626                 dev = br->dev;
 627         }
 628
 629         net = dev_net(dev);
 630         br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
 631
 632         skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
 633         if (skb == NULL)
 634                 goto errout;
 635
 636         err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev, false);
 637         if (err < 0) {
 638                 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
 639                 WARN_ON(err == -EMSGSIZE);
 640                 kfree_skb(skb);
 641                 goto errout;
 642         }
 643         rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
 644         return;
 645 errout:
 646         rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 647 }
 648
 649 /* Notify listeners of a change in bridge or port information */
 650 void br_ifinfo_notify(int event, const struct net_bridge *br,
 651                       const struct net_bridge_port *port)
 652 {
 653         u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
 654
 655         return br_info_notify(event, br, port, filter);
 656 }
 657
 658 /*
 659  * Dump information about all ports, in response to GETLINK
 660  */
 661 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 662                struct net_device *dev, u32 filter_mask, int nlflags)
 663 {
 664         struct net_bridge_port *port = br_port_get_rtnl(dev);
 665
 666         if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
 667             !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) &&
 668             !(filter_mask & RTEXT_FILTER_MRP) &&
 669             !(filter_mask & RTEXT_FILTER_CFM_CONFIG) &&
 670             !(filter_mask & RTEXT_FILTER_CFM_STATUS))
 671                 return 0;
 672
 673         return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
 674                               filter_mask, dev, true);
 675 }
 676
 677 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
 678                         int cmd, struct bridge_vlan_info *vinfo, bool *changed,
 679                         struct netlink_ext_ack *extack)
 680 {
 681         bool curr_change;
 682         int err = 0;
 683
 684         switch (cmd) {
 685         case RTM_SETLINK:
 686                 if (p) {
 687                         /* if the MASTER flag is set this will act on the global
 688                          * per-VLAN entry as well
 689                          */
 690                         err = nbp_vlan_add(p, vinfo->vid, vinfo->flags,
 691                                            &curr_change, extack);
 692                 } else {
 693                         vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 694                         err = br_vlan_add(br, vinfo->vid, vinfo->flags,
 695                                           &curr_change, extack);
 696                 }
 697                 if (curr_change)
 698                         *changed = true;
 699                 break;
 700
 701         case RTM_DELLINK:
 702                 if (p) {
 703                         if (!nbp_vlan_delete(p, vinfo->vid))
 704                                 *changed = true;
 705
 706                         if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
 707                             !br_vlan_delete(p->br, vinfo->vid))
 708                                 *changed = true;
 709                 } else if (!br_vlan_delete(br, vinfo->vid)) {
 710                         *changed = true;
 711                 }
 712                 break;
 713         }
 714
 715         return err;
 716 }
 717
 718 int br_process_vlan_info(struct net_bridge *br,
 719                          struct net_bridge_port *p, int cmd,
 720                          struct bridge_vlan_info *vinfo_curr,
 721                          struct bridge_vlan_info **vinfo_last,
 722                          bool *changed,
 723                          struct netlink_ext_ack *extack)
 724 {
 725         int err, rtm_cmd;
 726
 727         if (!br_vlan_valid_id(vinfo_curr->vid, extack))
 728                 return -EINVAL;
 729
 730         /* needed for vlan-only NEWVLAN/DELVLAN notifications */
 731         rtm_cmd = br_afspec_cmd_to_rtm(cmd);
 732
 733         if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 734                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 735                         return -EINVAL;
 736                 *vinfo_last = vinfo_curr;
 737                 return 0;
 738         }
 739
 740         if (*vinfo_last) {
 741                 struct bridge_vlan_info tmp_vinfo;
 742                 int v, v_change_start = 0;
 743
 744                 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack))
 745                         return -EINVAL;
 746
 747                 memcpy(&tmp_vinfo, *vinfo_last,
 748                        sizeof(struct bridge_vlan_info));
 749                 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
 750                         bool curr_change = false;
 751
 752                         tmp_vinfo.vid = v;
 753                         err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change,
 754                                            extack);
 755                         if (err)
 756                                 break;
 757                         if (curr_change) {
 758                                 *changed = curr_change;
 759                                 if (!v_change_start)
 760                                         v_change_start = v;
 761                         } else {
 762                                 /* nothing to notify yet */
 763                                 if (!v_change_start)
 764                                         continue;
 765                                 br_vlan_notify(br, p, v_change_start,
 766                                                v - 1, rtm_cmd);
 767                                 v_change_start = 0;
 768                         }
 769                         cond_resched();
 770                 }
 771                 /* v_change_start is set only if the last/whole range changed */
 772                 if (v_change_start)
 773                         br_vlan_notify(br, p, v_change_start,
 774                                        v - 1, rtm_cmd);
 775
 776                 *vinfo_last = NULL;
 777
 778                 return err;
 779         }
 780
 781         err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
 782         if (*changed)
 783                 br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd);
 784
 785         return err;
 786 }
 787
 788 static int br_afspec(struct net_bridge *br,
 789                      struct net_bridge_port *p,
 790                      struct nlattr *af_spec,
 791                      int cmd, bool *changed,
 792                      struct netlink_ext_ack *extack)
 793 {
 794         struct bridge_vlan_info *vinfo_curr = NULL;
 795         struct bridge_vlan_info *vinfo_last = NULL;
 796         struct nlattr *attr;
 797         struct vtunnel_info tinfo_last = {};
 798         struct vtunnel_info tinfo_curr = {};
 799         int err = 0, rem;
 800
 801         nla_for_each_nested(attr, af_spec, rem) {
 802                 err = 0;
 803                 switch (nla_type(attr)) {
 804                 case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
 805                         if (!p || !(p->flags & BR_VLAN_TUNNEL))
 806                                 return -EINVAL;
 807                         err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
 808                         if (err)
 809                                 return err;
 810                         err = br_process_vlan_tunnel_info(br, p, cmd,
 811                                                           &tinfo_curr,
 812                                                           &tinfo_last,
 813                                                           changed);
 814                         if (err)
 815                                 return err;
 816                         break;
 817                 case IFLA_BRIDGE_VLAN_INFO:
 818                         if (nla_len(attr) != sizeof(struct bridge_vlan_info))
 819                                 return -EINVAL;
 820                         vinfo_curr = nla_data(attr);
 821                         err = br_process_vlan_info(br, p, cmd, vinfo_curr,
 822                                                    &vinfo_last, changed,
 823                                                    extack);
 824                         if (err)
 825                                 return err;
 826                         break;
 827                 case IFLA_BRIDGE_MRP:
 828                         err = br_mrp_parse(br, p, attr, cmd, extack);
 829                         if (err)
 830                                 return err;
 831                         break;
 832                 case IFLA_BRIDGE_CFM:
 833                         err = br_cfm_parse(br, p, attr, cmd, extack);
 834                         if (err)
 835                                 return err;
 836                         break;
 837                 case IFLA_BRIDGE_MST:
 838                         if (!p) {
 839                                 NL_SET_ERR_MSG(extack,
 840                                                "MST states can only be set on bridge ports");
 841                                 return -EINVAL;
 842                         }
 843
 844                         if (cmd != RTM_SETLINK) {
 845                                 NL_SET_ERR_MSG(extack,
 846                                                "MST states can only be set through RTM_SETLINK");
 847                                 return -EINVAL;
 848                         }
 849
 850                         err = br_mst_process(p, attr, extack);
 851                         if (err)
 852                                 return err;
 853                         break;
 854                 }
 855         }
 856
 857         return err;
 858 }
 859
 860 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 861         [IFLA_BRPORT_STATE]     = { .type = NLA_U8 },
 862         [IFLA_BRPORT_COST]      = { .type = NLA_U32 },
 863         [IFLA_BRPORT_PRIORITY]  = { .type = NLA_U16 },
 864         [IFLA_BRPORT_MODE]      = { .type = NLA_U8 },
 865         [IFLA_BRPORT_GUARD]     = { .type = NLA_U8 },
 866         [IFLA_BRPORT_PROTECT]   = { .type = NLA_U8 },
 867         [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
 868         [IFLA_BRPORT_LEARNING]  = { .type = NLA_U8 },
 869         [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
 870         [IFLA_BRPORT_PROXYARP]  = { .type = NLA_U8 },
 871         [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
 872         [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
 873         [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
 874         [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
 875         [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
 876         [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
 877         [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
 878         [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
 879         [IFLA_BRPORT_ISOLATED]  = { .type = NLA_U8 },
 880         [IFLA_BRPORT_LOCKED] = { .type = NLA_U8 },
 881         [IFLA_BRPORT_MAB] = { .type = NLA_U8 },
 882         [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
 883         [IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT] = { .type = NLA_U32 },
 884 };
 885
 886 /* Change the state of the port and notify spanning tree */
 887 static int br_set_port_state(struct net_bridge_port *p, u8 state)
 888 {
 889         if (state > BR_STATE_BLOCKING)
 890                 return -EINVAL;
 891
 892         /* if kernel STP is running, don't allow changes */
 893         if (p->br->stp_enabled == BR_KERNEL_STP)
 894                 return -EBUSY;
 895
 896         /* if device is not up, change is not allowed
 897          * if link is not present, only allowable state is disabled
 898          */
 899         if (!netif_running(p->dev) ||
 900             (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 901                 return -ENETDOWN;
 902
 903         br_set_state(p, state);
 904         br_port_state_selection(p->br);
 905         return 0;
 906 }
 907
 908 /* Set/clear or port flags based on attribute */
 909 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
 910                              int attrtype, unsigned long mask)
 911 {
 912         if (!tb[attrtype])
 913                 return;
 914
 915         if (nla_get_u8(tb[attrtype]))
 916                 p->flags |= mask;
 917         else
 918                 p->flags &= ~mask;
 919 }
 920
 921 /* Process bridge protocol info on port */
 922 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[],
 923                       struct netlink_ext_ack *extack)
 924 {
 925         unsigned long old_flags, changed_mask;
 926         bool br_vlan_tunnel_old;
 927         int err;
 928
 929         old_flags = p->flags;
 930         br_vlan_tunnel_old = (old_flags & BR_VLAN_TUNNEL) ? true : false;
 931
 932         br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
 933         br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
 934         br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE,
 935                          BR_MULTICAST_FAST_LEAVE);
 936         br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
 937         br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
 938         br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
 939         br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
 940         br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST,
 941                          BR_MULTICAST_TO_UNICAST);
 942         br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
 943         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
 944         br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
 945         br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
 946         br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS, BR_NEIGH_SUPPRESS);
 947         br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
 948         br_set_port_flag(p, tb, IFLA_BRPORT_LOCKED, BR_PORT_LOCKED);
 949         br_set_port_flag(p, tb, IFLA_BRPORT_MAB, BR_PORT_MAB);
 950
 951         if ((p->flags & BR_PORT_MAB) &&
 952             (!(p->flags & BR_PORT_LOCKED) || !(p->flags & BR_LEARNING))) {
 953                 NL_SET_ERR_MSG(extack, "Bridge port must be locked and have learning enabled when MAB is enabled");
 954                 p->flags = old_flags;
 955                 return -EINVAL;
 956         } else if (!(p->flags & BR_PORT_MAB) && (old_flags & BR_PORT_MAB)) {
 957                 struct net_bridge_fdb_flush_desc desc = {
 958                         .flags = BIT(BR_FDB_LOCKED),
 959                         .flags_mask = BIT(BR_FDB_LOCKED),
 960                         .port_ifindex = p->dev->ifindex,
 961                 };
 962
 963                 br_fdb_flush(p->br, &desc);
 964         }
 965
 966         changed_mask = old_flags ^ p->flags;
 967
 968         err = br_switchdev_set_port_flag(p, p->flags, changed_mask, extack);
 969         if (err) {
 970                 p->flags = old_flags;
 971                 return err;
 972         }
 973
 974         if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
 975                 nbp_vlan_tunnel_info_flush(p);
 976
 977         br_port_flags_change(p, changed_mask);
 978
 979         if (tb[IFLA_BRPORT_COST]) {
 980                 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
 981                 if (err)
 982                         return err;
 983         }
 984
 985         if (tb[IFLA_BRPORT_PRIORITY]) {
 986                 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
 987                 if (err)
 988                         return err;
 989         }
 990
 991         if (tb[IFLA_BRPORT_STATE]) {
 992                 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
 993                 if (err)
 994                         return err;
 995         }
 996
 997         if (tb[IFLA_BRPORT_FLUSH])
 998                 br_fdb_delete_by_port(p->br, p, 0, 0);
 999
1000 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1001         if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
1002                 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
1003
1004                 err = br_multicast_set_port_router(&p->multicast_ctx,
1005                                                    mcast_router);
1006                 if (err)
1007                         return err;
1008         }
1009
1010         if (tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]) {
1011                 u32 hlimit;
1012
1013                 hlimit = nla_get_u32(tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]);
1014                 err = br_multicast_eht_set_hosts_limit(p, hlimit);
1015                 if (err)
1016                         return err;
1017         }
1018 #endif
1019
1020         if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
1021                 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
1022
1023                 if (fwd_mask & BR_GROUPFWD_MACPAUSE)
1024                         return -EINVAL;
1025                 p->group_fwd_mask = fwd_mask;
1026         }
1027
1028         if (tb[IFLA_BRPORT_BACKUP_PORT]) {
1029                 struct net_device *backup_dev = NULL;
1030                 u32 backup_ifindex;
1031
1032                 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
1033                 if (backup_ifindex) {
1034                         backup_dev = __dev_get_by_index(dev_net(p->dev),
1035                                                         backup_ifindex);
1036                         if (!backup_dev)
1037                                 return -ENOENT;
1038                 }
1039
1040                 err = nbp_backup_change(p, backup_dev);
1041                 if (err)
1042                         return err;
1043         }
1044
1045         return 0;
1046 }
1047
1048 /* Change state and parameters on port. */
1049 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags,
1050                struct netlink_ext_ack *extack)
1051 {
1052         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
1053         struct nlattr *tb[IFLA_BRPORT_MAX + 1];
1054         struct net_bridge_port *p;
1055         struct nlattr *protinfo;
1056         struct nlattr *afspec;
1057         bool changed = false;
1058         int err = 0;
1059
1060         protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
1061         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
1062         if (!protinfo && !afspec)
1063                 return 0;
1064
1065         p = br_port_get_rtnl(dev);
1066         /* We want to accept dev as bridge itself if the AF_SPEC
1067          * is set to see if someone is setting vlan info on the bridge
1068          */
1069         if (!p && !afspec)
1070                 return -EINVAL;
1071
1072         if (p && protinfo) {
1073                 if (protinfo->nla_type & NLA_F_NESTED) {
1074                         err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX,
1075                                                           protinfo,
1076                                                           br_port_policy,
1077                                                           NULL);
1078                         if (err)
1079                                 return err;
1080
1081                         spin_lock_bh(&p->br->lock);
1082                         err = br_setport(p, tb, extack);
1083                         spin_unlock_bh(&p->br->lock);
1084                 } else {
1085                         /* Binary compatibility with old RSTP */
1086                         if (nla_len(protinfo) < sizeof(u8))
1087                                 return -EINVAL;
1088
1089                         spin_lock_bh(&p->br->lock);
1090                         err = br_set_port_state(p, nla_get_u8(protinfo));
1091                         spin_unlock_bh(&p->br->lock);
1092                 }
1093                 if (err)
1094                         goto out;
1095                 changed = true;
1096         }
1097
1098         if (afspec)
1099                 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
1100
1101         if (changed)
1102                 br_ifinfo_notify(RTM_NEWLINK, br, p);
1103 out:
1104         return err;
1105 }
1106
1107 /* Delete port information */
1108 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
1109 {
1110         struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
1111         struct net_bridge_port *p;
1112         struct nlattr *afspec;
1113         bool changed = false;
1114         int err = 0;
1115
1116         afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
1117         if (!afspec)
1118                 return 0;
1119
1120         p = br_port_get_rtnl(dev);
1121         /* We want to accept dev as bridge itself as well */
1122         if (!p && !netif_is_bridge_master(dev))
1123                 return -EINVAL;
1124
1125         err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL);
1126         if (changed)
1127                 /* Send RTM_NEWLINK because userspace
1128                  * expects RTM_NEWLINK for vlan dels
1129                  */
1130                 br_ifinfo_notify(RTM_NEWLINK, br, p);
1131
1132         return err;
1133 }
1134
1135 static int br_validate(struct nlattr *tb[], struct nlattr *data[],
1136                        struct netlink_ext_ack *extack)
1137 {
1138         if (tb[IFLA_ADDRESS]) {
1139                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1140                         return -EINVAL;
1141                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1142                         return -EADDRNOTAVAIL;
1143         }
1144
1145         if (!data)
1146                 return 0;
1147
1148 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1149         if (data[IFLA_BR_VLAN_PROTOCOL] &&
1150             !eth_type_vlan(nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])))
1151                 return -EPROTONOSUPPORT;
1152
1153         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1154                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1155
1156                 if (defpvid >= VLAN_VID_MASK)
1157                         return -EINVAL;
1158         }
1159 #endif
1160
1161         return 0;
1162 }
1163
1164 static int br_port_slave_changelink(struct net_device *brdev,
1165                                     struct net_device *dev,
1166                                     struct nlattr *tb[],
1167                                     struct nlattr *data[],
1168                                     struct netlink_ext_ack *extack)
1169 {
1170         struct net_bridge *br = netdev_priv(brdev);
1171         int ret;
1172
1173         if (!data)
1174                 return 0;
1175
1176         spin_lock_bh(&br->lock);
1177         ret = br_setport(br_port_get_rtnl(dev), data, extack);
1178         spin_unlock_bh(&br->lock);
1179
1180         return ret;
1181 }
1182
1183 static int br_port_fill_slave_info(struct sk_buff *skb,
1184                                    const struct net_device *brdev,
1185                                    const struct net_device *dev)
1186 {
1187         return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
1188 }
1189
1190 static size_t br_port_get_slave_size(const struct net_device *brdev,
1191                                      const struct net_device *dev)
1192 {
1193         return br_port_info_size();
1194 }
1195
1196 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
1197         [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
1198         [IFLA_BR_HELLO_TIME]    = { .type = NLA_U32 },
1199         [IFLA_BR_MAX_AGE]       = { .type = NLA_U32 },
1200         [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
1201         [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
1202         [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
1203         [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
1204         [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
1205         [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
1206         [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
1207                                  .len  = ETH_ALEN },
1208         [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
1209         [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
1210         [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
1211         [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
1212         [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
1213         [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
1214         [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
1215         [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
1216         [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
1217         [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
1218         [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
1219         [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
1220         [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
1221         [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
1222         [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
1223         [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
1224         [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
1225         [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
1226         [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
1227         [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
1228         [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
1229         [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
1230         [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
1231         [IFLA_BR_MULTI_BOOLOPT] =
1232                 NLA_POLICY_EXACT_LEN(sizeof(struct br_boolopt_multi)),
1233 };
1234
1235 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
1236                          struct nlattr *data[],
1237                          struct netlink_ext_ack *extack)
1238 {
1239         struct net_bridge *br = netdev_priv(brdev);
1240         int err;
1241
1242         if (!data)
1243                 return 0;
1244
1245         if (data[IFLA_BR_FORWARD_DELAY]) {
1246                 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
1247                 if (err)
1248                         return err;
1249         }
1250
1251         if (data[IFLA_BR_HELLO_TIME]) {
1252                 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
1253                 if (err)
1254                         return err;
1255         }
1256
1257         if (data[IFLA_BR_MAX_AGE]) {
1258                 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
1259                 if (err)
1260                         return err;
1261         }
1262
1263         if (data[IFLA_BR_AGEING_TIME]) {
1264                 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
1265                 if (err)
1266                         return err;
1267         }
1268
1269         if (data[IFLA_BR_STP_STATE]) {
1270                 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
1271
1272                 err = br_stp_set_enabled(br, stp_enabled, extack);
1273                 if (err)
1274                         return err;
1275         }
1276
1277         if (data[IFLA_BR_PRIORITY]) {
1278                 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
1279
1280                 br_stp_set_bridge_priority(br, priority);
1281         }
1282
1283         if (data[IFLA_BR_VLAN_FILTERING]) {
1284                 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
1285
1286                 err = br_vlan_filter_toggle(br, vlan_filter, extack);
1287                 if (err)
1288                         return err;
1289         }
1290
1291 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1292         if (data[IFLA_BR_VLAN_PROTOCOL]) {
1293                 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
1294
1295                 err = __br_vlan_set_proto(br, vlan_proto, extack);
1296                 if (err)
1297                         return err;
1298         }
1299
1300         if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
1301                 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
1302
1303                 err = __br_vlan_set_default_pvid(br, defpvid, extack);
1304                 if (err)
1305                         return err;
1306         }
1307
1308         if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
1309                 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
1310
1311                 err = br_vlan_set_stats(br, vlan_stats);
1312                 if (err)
1313                         return err;
1314         }
1315
1316         if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
1317                 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
1318
1319                 err = br_vlan_set_stats_per_port(br, per_port);
1320                 if (err)
1321                         return err;
1322         }
1323 #endif
1324
1325         if (data[IFLA_BR_GROUP_FWD_MASK]) {
1326                 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
1327
1328                 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
1329                         return -EINVAL;
1330                 br->group_fwd_mask = fwd_mask;
1331         }
1332
1333         if (data[IFLA_BR_GROUP_ADDR]) {
1334                 u8 new_addr[ETH_ALEN];
1335
1336                 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
1337                         return -EINVAL;
1338                 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
1339                 if (!is_link_local_ether_addr(new_addr))
1340                         return -EINVAL;
1341                 if (new_addr[5] == 1 ||         /* 802.3x Pause address */
1342                     new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
1343                     new_addr[5] == 3)           /* 802.1X PAE address */
1344                         return -EINVAL;
1345                 spin_lock_bh(&br->lock);
1346                 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
1347                 spin_unlock_bh(&br->lock);
1348                 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
1349                 br_recalculate_fwd_mask(br);
1350         }
1351
1352         if (data[IFLA_BR_FDB_FLUSH]) {
1353                 struct net_bridge_fdb_flush_desc desc = {
1354                         .flags_mask = BIT(BR_FDB_STATIC)
1355                 };
1356
1357                 br_fdb_flush(br, &desc);
1358         }
1359
1360 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1361         if (data[IFLA_BR_MCAST_ROUTER]) {
1362                 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
1363
1364                 err = br_multicast_set_router(&br->multicast_ctx,
1365                                               multicast_router);
1366                 if (err)
1367                         return err;
1368         }
1369
1370         if (data[IFLA_BR_MCAST_SNOOPING]) {
1371                 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
1372
1373                 err = br_multicast_toggle(br, mcast_snooping, extack);
1374                 if (err)
1375                         return err;
1376         }
1377
1378         if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
1379                 u8 val;
1380
1381                 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
1382                 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
1383         }
1384
1385         if (data[IFLA_BR_MCAST_QUERIER]) {
1386                 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
1387
1388                 err = br_multicast_set_querier(&br->multicast_ctx,
1389                                                mcast_querier);
1390                 if (err)
1391                         return err;
1392         }
1393
1394         if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
1395                 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
1396                         RHT_ELASTICITY);
1397
1398         if (data[IFLA_BR_MCAST_HASH_MAX])
1399                 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1400
1401         if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1402                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1403
1404                 br->multicast_ctx.multicast_last_member_count = val;
1405         }
1406
1407         if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1408                 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1409
1410                 br->multicast_ctx.multicast_startup_query_count = val;
1411         }
1412
1413         if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1414                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1415
1416                 br->multicast_ctx.multicast_last_member_interval = clock_t_to_jiffies(val);
1417         }
1418
1419         if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1420                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1421
1422                 br->multicast_ctx.multicast_membership_interval = clock_t_to_jiffies(val);
1423         }
1424
1425         if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1426                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1427
1428                 br->multicast_ctx.multicast_querier_interval = clock_t_to_jiffies(val);
1429         }
1430
1431         if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1432                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1433
1434                 br_multicast_set_query_intvl(&br->multicast_ctx, val);
1435         }
1436
1437         if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1438                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1439
1440                 br->multicast_ctx.multicast_query_response_interval = clock_t_to_jiffies(val);
1441         }
1442
1443         if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1444                 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1445
1446                 br_multicast_set_startup_query_intvl(&br->multicast_ctx, val);
1447         }
1448
1449         if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1450                 __u8 mcast_stats;
1451
1452                 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1453                 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
1454         }
1455
1456         if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1457                 __u8 igmp_version;
1458
1459                 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1460                 err = br_multicast_set_igmp_version(&br->multicast_ctx,
1461                                                     igmp_version);
1462                 if (err)
1463                         return err;
1464         }
1465
1466 #if IS_ENABLED(CONFIG_IPV6)
1467         if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1468                 __u8 mld_version;
1469
1470                 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1471                 err = br_multicast_set_mld_version(&br->multicast_ctx,
1472                                                    mld_version);
1473                 if (err)
1474                         return err;
1475         }
1476 #endif
1477 #endif
1478 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1479         if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1480                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1481
1482                 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
1483         }
1484
1485         if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1486                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1487
1488                 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
1489         }
1490
1491         if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1492                 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1493
1494                 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
1495         }
1496 #endif
1497
1498         if (data[IFLA_BR_MULTI_BOOLOPT]) {
1499                 struct br_boolopt_multi *bm;
1500
1501                 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
1502                 err = br_boolopt_multi_toggle(br, bm, extack);
1503                 if (err)
1504                         return err;
1505         }
1506
1507         return 0;
1508 }
1509
1510 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1511                           struct nlattr *tb[], struct nlattr *data[],
1512                           struct netlink_ext_ack *extack)
1513 {
1514         struct net_bridge *br = netdev_priv(dev);
1515         int err;
1516
1517         err = register_netdevice(dev);
1518         if (err)
1519                 return err;
1520
1521         if (tb[IFLA_ADDRESS]) {
1522                 spin_lock_bh(&br->lock);
1523                 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1524                 spin_unlock_bh(&br->lock);
1525         }
1526
1527         err = br_changelink(dev, tb, data, extack);
1528         if (err)
1529                 br_dev_delete(dev, NULL);
1530
1531         return err;
1532 }
1533
1534 static size_t br_get_size(const struct net_device *brdev)
1535 {
1536         return nla_total_size(sizeof(u32)) +    /* IFLA_BR_FORWARD_DELAY  */
1537                nla_total_size(sizeof(u32)) +    /* IFLA_BR_HELLO_TIME */
1538                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MAX_AGE */
1539                nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
1540                nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
1541                nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
1542                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_FILTERING */
1543 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1544                nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1545                nla_total_size(sizeof(u16)) +    /* IFLA_BR_VLAN_DEFAULT_PVID */
1546                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_ENABLED */
1547                nla_total_size(sizeof(u8)) +     /* IFLA_BR_VLAN_STATS_PER_PORT */
1548 #endif
1549                nla_total_size(sizeof(u16)) +    /* IFLA_BR_GROUP_FWD_MASK */
1550                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_ROOT_ID */
1551                nla_total_size(sizeof(struct ifla_bridge_id)) +   /* IFLA_BR_BRIDGE_ID */
1552                nla_total_size(sizeof(u16)) +    /* IFLA_BR_ROOT_PORT */
1553                nla_total_size(sizeof(u32)) +    /* IFLA_BR_ROOT_PATH_COST */
1554                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE */
1555                nla_total_size(sizeof(u8)) +     /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1556                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1557                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1558                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1559                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1560                nla_total_size(ETH_ALEN) +       /* IFLA_BR_GROUP_ADDR */
1561 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1562                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_ROUTER */
1563                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_SNOOPING */
1564                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1565                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_QUERIER */
1566                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_STATS_ENABLED */
1567                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_ELASTICITY */
1568                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_HASH_MAX */
1569                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1570                nla_total_size(sizeof(u32)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1571                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1572                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1573                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1574                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1575                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1576                nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1577                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_IGMP_VERSION */
1578                nla_total_size(sizeof(u8)) +     /* IFLA_BR_MCAST_MLD_VERSION */
1579                br_multicast_querier_state_size() + /* IFLA_BR_MCAST_QUERIER_STATE */
1580 #endif
1581 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1582                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
1583                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
1584                nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
1585 #endif
1586                nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
1587                0;
1588 }
1589
1590 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1591 {
1592         struct net_bridge *br = netdev_priv(brdev);
1593         u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1594         u32 hello_time = jiffies_to_clock_t(br->hello_time);
1595         u32 age_time = jiffies_to_clock_t(br->max_age);
1596         u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1597         u32 stp_enabled = br->stp_enabled;
1598         u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1599         u8 vlan_enabled = br_vlan_enabled(br->dev);
1600         struct br_boolopt_multi bm;
1601         u64 clockval;
1602
1603         clockval = br_timer_value(&br->hello_timer);
1604         if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1605                 return -EMSGSIZE;
1606         clockval = br_timer_value(&br->tcn_timer);
1607         if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1608                 return -EMSGSIZE;
1609         clockval = br_timer_value(&br->topology_change_timer);
1610         if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1611                               IFLA_BR_PAD))
1612                 return -EMSGSIZE;
1613         clockval = br_timer_value(&br->gc_work.timer);
1614         if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1615                 return -EMSGSIZE;
1616
1617         br_boolopt_multi_get(br, &bm);
1618         if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1619             nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1620             nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1621             nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1622             nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1623             nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1624             nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1625             nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1626             nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1627                     &br->bridge_id) ||
1628             nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1629                     &br->designated_root) ||
1630             nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1631             nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1632             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1633             nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1634                        br->topology_change_detected) ||
1635             nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
1636             nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
1637                 return -EMSGSIZE;
1638
1639 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1640         if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1641             nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1642             nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
1643                        br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
1644             nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
1645                        br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)))
1646                 return -EMSGSIZE;
1647 #endif
1648 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1649         if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER,
1650                        br->multicast_ctx.multicast_router) ||
1651             nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
1652                        br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
1653             nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1654                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
1655             nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
1656                        br->multicast_ctx.multicast_querier) ||
1657             nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1658                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
1659             nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
1660             nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1661             nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1662                         br->multicast_ctx.multicast_last_member_count) ||
1663             nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1664                         br->multicast_ctx.multicast_startup_query_count) ||
1665             nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1666                        br->multicast_ctx.multicast_igmp_version) ||
1667             br_multicast_dump_querier_state(skb, &br->multicast_ctx,
1668                                             IFLA_BR_MCAST_QUERIER_STATE))
1669                 return -EMSGSIZE;
1670 #if IS_ENABLED(CONFIG_IPV6)
1671         if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1672                        br->multicast_ctx.multicast_mld_version))
1673                 return -EMSGSIZE;
1674 #endif
1675         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_last_member_interval);
1676         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1677                               IFLA_BR_PAD))
1678                 return -EMSGSIZE;
1679         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_membership_interval);
1680         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1681                               IFLA_BR_PAD))
1682                 return -EMSGSIZE;
1683         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_querier_interval);
1684         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1685                               IFLA_BR_PAD))
1686                 return -EMSGSIZE;
1687         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_interval);
1688         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1689                               IFLA_BR_PAD))
1690                 return -EMSGSIZE;
1691         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_response_interval);
1692         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1693                               IFLA_BR_PAD))
1694                 return -EMSGSIZE;
1695         clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_startup_query_interval);
1696         if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1697                               IFLA_BR_PAD))
1698                 return -EMSGSIZE;
1699 #endif
1700 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1701         if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1702                        br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
1703             nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1704                        br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
1705             nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1706                        br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
1707                 return -EMSGSIZE;
1708 #endif
1709
1710         return 0;
1711 }
1712
1713 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1714 {
1715         struct net_bridge_port *p = NULL;
1716         struct net_bridge_vlan_group *vg;
1717         struct net_bridge_vlan *v;
1718         struct net_bridge *br;
1719         int numvls = 0;
1720
1721         switch (attr) {
1722         case IFLA_STATS_LINK_XSTATS:
1723                 br = netdev_priv(dev);
1724                 vg = br_vlan_group(br);
1725                 break;
1726         case IFLA_STATS_LINK_XSTATS_SLAVE:
1727                 p = br_port_get_rtnl(dev);
1728                 if (!p)
1729                         return 0;
1730                 vg = nbp_vlan_group(p);
1731                 break;
1732         default:
1733                 return 0;
1734         }
1735
1736         if (vg) {
1737                 /* we need to count all, even placeholder entries */
1738                 list_for_each_entry(v, &vg->vlan_list, vlist)
1739                         numvls++;
1740         }
1741
1742         return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1743                nla_total_size_64bit(sizeof(struct br_mcast_stats)) +
1744                (p ? nla_total_size_64bit(sizeof(p->stp_xstats)) : 0) +
1745                nla_total_size(0);
1746 }
1747
1748 static int br_fill_linkxstats(struct sk_buff *skb,
1749                               const struct net_device *dev,
1750                               int *prividx, int attr)
1751 {
1752         struct nlattr *nla __maybe_unused;
1753         struct net_bridge_port *p = NULL;
1754         struct net_bridge_vlan_group *vg;
1755         struct net_bridge_vlan *v;
1756         struct net_bridge *br;
1757         struct nlattr *nest;
1758         int vl_idx = 0;
1759
1760         switch (attr) {
1761         case IFLA_STATS_LINK_XSTATS:
1762                 br = netdev_priv(dev);
1763                 vg = br_vlan_group(br);
1764                 break;
1765         case IFLA_STATS_LINK_XSTATS_SLAVE:
1766                 p = br_port_get_rtnl(dev);
1767                 if (!p)
1768                         return 0;
1769                 br = p->br;
1770                 vg = nbp_vlan_group(p);
1771                 break;
1772         default:
1773                 return -EINVAL;
1774         }
1775
1776         nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE);
1777         if (!nest)
1778                 return -EMSGSIZE;
1779
1780         if (vg) {
1781                 u16 pvid;
1782
1783                 pvid = br_get_pvid(vg);
1784                 list_for_each_entry(v, &vg->vlan_list, vlist) {
1785                         struct bridge_vlan_xstats vxi;
1786                         struct pcpu_sw_netstats stats;
1787
1788                         if (++vl_idx < *prividx)
1789                                 continue;
1790                         memset(&vxi, 0, sizeof(vxi));
1791                         vxi.vid = v->vid;
1792                         vxi.flags = v->flags;
1793                         if (v->vid == pvid)
1794                                 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1795                         br_vlan_get_stats(v, &stats);
1796                         vxi.rx_bytes = u64_stats_read(&stats.rx_bytes);
1797                         vxi.rx_packets = u64_stats_read(&stats.rx_packets);
1798                         vxi.tx_bytes = u64_stats_read(&stats.tx_bytes);
1799                         vxi.tx_packets = u64_stats_read(&stats.tx_packets);
1800
1801                         if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1802                                 goto nla_put_failure;
1803                 }
1804         }
1805
1806 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1807         if (++vl_idx >= *prividx) {
1808                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1809                                         sizeof(struct br_mcast_stats),
1810                                         BRIDGE_XSTATS_PAD);
1811                 if (!nla)
1812                         goto nla_put_failure;
1813                 br_multicast_get_stats(br, p, nla_data(nla));
1814         }
1815 #endif
1816
1817         if (p) {
1818                 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP,
1819                                         sizeof(p->stp_xstats),
1820                                         BRIDGE_XSTATS_PAD);
1821                 if (!nla)
1822                         goto nla_put_failure;
1823
1824                 spin_lock_bh(&br->lock);
1825                 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats));
1826                 spin_unlock_bh(&br->lock);
1827         }
1828
1829         nla_nest_end(skb, nest);
1830         *prividx = 0;
1831
1832         return 0;
1833
1834 nla_put_failure:
1835         nla_nest_end(skb, nest);
1836         *prividx = vl_idx;
1837
1838         return -EMSGSIZE;
1839 }
1840
1841 static struct rtnl_af_ops br_af_ops __read_mostly = {
1842         .family                 = AF_BRIDGE,
1843         .get_link_af_size       = br_get_link_af_size_filtered,
1844 };
1845
1846 struct rtnl_link_ops br_link_ops __read_mostly = {
1847         .kind                   = "bridge",
1848         .priv_size              = sizeof(struct net_bridge),
1849         .setup                  = br_dev_setup,
1850         .maxtype                = IFLA_BR_MAX,
1851         .policy                 = br_policy,
1852         .validate               = br_validate,
1853         .newlink                = br_dev_newlink,
1854         .changelink             = br_changelink,
1855         .dellink                = br_dev_delete,
1856         .get_size               = br_get_size,
1857         .fill_info              = br_fill_info,
1858         .fill_linkxstats        = br_fill_linkxstats,
1859         .get_linkxstats_size    = br_get_linkxstats_size,
1860
1861         .slave_maxtype          = IFLA_BRPORT_MAX,
1862         .slave_policy           = br_port_policy,
1863         .slave_changelink       = br_port_slave_changelink,
1864         .get_slave_size         = br_port_get_slave_size,
1865         .fill_slave_info        = br_port_fill_slave_info,
1866 };
1867
1868 int __init br_netlink_init(void)
1869 {
1870         int err;
1871
1872         br_mdb_init();
1873         br_vlan_rtnl_init();
1874         rtnl_af_register(&br_af_ops);
1875
1876         err = rtnl_link_register(&br_link_ops);
1877         if (err)
1878                 goto out_af;
1879
1880         return 0;
1881
1882 out_af:
1883         rtnl_af_unregister(&br_af_ops);
1884         br_mdb_uninit();
1885         return err;
1886 }
1887
1888 void br_netlink_fini(void)
1889 {
1890         br_mdb_uninit();
1891         br_vlan_rtnl_uninit();
1892         rtnl_af_unregister(&br_af_ops);
1893         rtnl_link_unregister(&br_link_ops);
1894 }