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