1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Bridge netlink control interface 4 * 5 * Authors: 6 * Stephen Hemminger <shemminger@osdl.org> 7 */ 8 9 #include <linux/kernel.h> 10 #include <linux/slab.h> 11 #include <linux/etherdevice.h> 12 #include <net/rtnetlink.h> 13 #include <net/net_namespace.h> 14 #include <net/sock.h> 15 #include <uapi/linux/if_bridge.h> 16 17 #include "br_private.h" 18 #include "br_private_stp.h" 19 #include "br_private_cfm.h" 20 #include "br_private_tunnel.h" 21 #include "br_private_mcast_eht.h" 22 23 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg, 24 u32 filter_mask) 25 { 26 struct net_bridge_vlan *v; 27 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0; 28 u16 flags, pvid; 29 int num_vlans = 0; 30 31 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) 32 return 0; 33 34 pvid = br_get_pvid(vg); 35 /* Count number of vlan infos */ 36 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 37 flags = 0; 38 /* only a context, bridge vlan not activated */ 39 if (!br_vlan_should_use(v)) 40 continue; 41 if (v->vid == pvid) 42 flags |= BRIDGE_VLAN_INFO_PVID; 43 44 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 45 flags |= BRIDGE_VLAN_INFO_UNTAGGED; 46 47 if (vid_range_start == 0) { 48 goto initvars; 49 } else if ((v->vid - vid_range_end) == 1 && 50 flags == vid_range_flags) { 51 vid_range_end = v->vid; 52 continue; 53 } else { 54 if ((vid_range_end - vid_range_start) > 0) 55 num_vlans += 2; 56 else 57 num_vlans += 1; 58 } 59 initvars: 60 vid_range_start = v->vid; 61 vid_range_end = v->vid; 62 vid_range_flags = flags; 63 } 64 65 if (vid_range_start != 0) { 66 if ((vid_range_end - vid_range_start) > 0) 67 num_vlans += 2; 68 else 69 num_vlans += 1; 70 } 71 72 return num_vlans; 73 } 74 75 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg, 76 u32 filter_mask) 77 { 78 int num_vlans; 79 80 if (!vg) 81 return 0; 82 83 if (filter_mask & RTEXT_FILTER_BRVLAN) 84 return vg->num_vlans; 85 86 rcu_read_lock(); 87 num_vlans = __get_num_vlan_infos(vg, filter_mask); 88 rcu_read_unlock(); 89 90 return num_vlans; 91 } 92 93 static size_t br_get_link_af_size_filtered(const struct net_device *dev, 94 u32 filter_mask) 95 { 96 struct net_bridge_vlan_group *vg = NULL; 97 struct net_bridge_port *p = NULL; 98 struct net_bridge *br = NULL; 99 u32 num_cfm_peer_mep_infos; 100 u32 num_cfm_mep_infos; 101 size_t vinfo_sz = 0; 102 int num_vlan_infos; 103 104 rcu_read_lock(); 105 if (netif_is_bridge_port(dev)) { 106 p = br_port_get_check_rcu(dev); 107 if (p) 108 vg = nbp_vlan_group_rcu(p); 109 } else if (netif_is_bridge_master(dev)) { 110 br = netdev_priv(dev); 111 vg = br_vlan_group_rcu(br); 112 } 113 num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask); 114 rcu_read_unlock(); 115 116 if (p && (p->flags & BR_VLAN_TUNNEL)) 117 vinfo_sz += br_get_vlan_tunnel_info_size(vg); 118 119 /* Each VLAN is returned in bridge_vlan_info along with flags */ 120 vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info)); 121 122 if (p && vg && (filter_mask & RTEXT_FILTER_MST)) 123 vinfo_sz += br_mst_info_size(vg); 124 125 if (!(filter_mask & RTEXT_FILTER_CFM_STATUS)) 126 return vinfo_sz; 127 128 if (!br) 129 return vinfo_sz; 130 131 /* CFM status info must be added */ 132 br_cfm_mep_count(br, &num_cfm_mep_infos); 133 br_cfm_peer_mep_count(br, &num_cfm_peer_mep_infos); 134 135 vinfo_sz += nla_total_size(0); /* IFLA_BRIDGE_CFM */ 136 /* For each status struct the MEP instance (u32) is added */ 137 /* MEP instance (u32) + br_cfm_mep_status */ 138 vinfo_sz += num_cfm_mep_infos * 139 /*IFLA_BRIDGE_CFM_MEP_STATUS_INSTANCE */ 140 (nla_total_size(sizeof(u32)) 141 /* IFLA_BRIDGE_CFM_MEP_STATUS_OPCODE_UNEXP_SEEN */ 142 + nla_total_size(sizeof(u32)) 143 /* IFLA_BRIDGE_CFM_MEP_STATUS_VERSION_UNEXP_SEEN */ 144 + nla_total_size(sizeof(u32)) 145 /* IFLA_BRIDGE_CFM_MEP_STATUS_RX_LEVEL_LOW_SEEN */ 146 + nla_total_size(sizeof(u32))); 147 /* MEP instance (u32) + br_cfm_cc_peer_status */ 148 vinfo_sz += num_cfm_peer_mep_infos * 149 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_INSTANCE */ 150 (nla_total_size(sizeof(u32)) 151 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_PEER_MEPID */ 152 + nla_total_size(sizeof(u32)) 153 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_CCM_DEFECT */ 154 + nla_total_size(sizeof(u32)) 155 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_RDI */ 156 + nla_total_size(sizeof(u32)) 157 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_PORT_TLV_VALUE */ 158 + nla_total_size(sizeof(u8)) 159 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_IF_TLV_VALUE */ 160 + nla_total_size(sizeof(u8)) 161 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEEN */ 162 + nla_total_size(sizeof(u32)) 163 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_TLV_SEEN */ 164 + nla_total_size(sizeof(u32)) 165 /* IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEQ_UNEXP_SEEN */ 166 + nla_total_size(sizeof(u32))); 167 168 return vinfo_sz; 169 } 170 171 static inline size_t br_port_info_size(void) 172 { 173 return nla_total_size(1) /* IFLA_BRPORT_STATE */ 174 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */ 175 + nla_total_size(4) /* IFLA_BRPORT_COST */ 176 + nla_total_size(1) /* IFLA_BRPORT_MODE */ 177 + nla_total_size(1) /* IFLA_BRPORT_GUARD */ 178 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */ 179 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */ 180 + nla_total_size(1) /* IFLA_BRPORT_MCAST_TO_UCAST */ 181 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */ 182 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */ 183 + nla_total_size(1) /* IFLA_BRPORT_MCAST_FLOOD */ 184 + nla_total_size(1) /* IFLA_BRPORT_BCAST_FLOOD */ 185 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */ 186 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */ 187 + nla_total_size(1) /* IFLA_BRPORT_VLAN_TUNNEL */ 188 + nla_total_size(1) /* IFLA_BRPORT_NEIGH_SUPPRESS */ 189 + nla_total_size(1) /* IFLA_BRPORT_ISOLATED */ 190 + nla_total_size(1) /* IFLA_BRPORT_LOCKED */ 191 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */ 192 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */ 193 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */ 194 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */ 195 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */ 196 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */ 197 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */ 198 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */ 199 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */ 200 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */ 201 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */ 202 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 203 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */ 204 #endif 205 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_GROUP_FWD_MASK */ 206 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MRP_RING_OPEN */ 207 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MRP_IN_OPEN */ 208 + nla_total_size(sizeof(u32)) /* IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT */ 209 + nla_total_size(sizeof(u32)) /* IFLA_BRPORT_MCAST_EHT_HOSTS_CNT */ 210 + 0; 211 } 212 213 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask) 214 { 215 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 216 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 217 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 218 + nla_total_size(4) /* IFLA_MASTER */ 219 + nla_total_size(4) /* IFLA_MTU */ 220 + nla_total_size(4) /* IFLA_LINK */ 221 + nla_total_size(1) /* IFLA_OPERSTATE */ 222 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */ 223 + nla_total_size(br_get_link_af_size_filtered(dev, 224 filter_mask)) /* IFLA_AF_SPEC */ 225 + nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */ 226 } 227 228 static int br_port_fill_attrs(struct sk_buff *skb, 229 const struct net_bridge_port *p) 230 { 231 u8 mode = !!(p->flags & BR_HAIRPIN_MODE); 232 struct net_bridge_port *backup_p; 233 u64 timerval; 234 235 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) || 236 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) || 237 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) || 238 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) || 239 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) || 240 nla_put_u8(skb, IFLA_BRPORT_PROTECT, 241 !!(p->flags & BR_ROOT_BLOCK)) || 242 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, 243 !!(p->flags & BR_MULTICAST_FAST_LEAVE)) || 244 nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST, 245 !!(p->flags & BR_MULTICAST_TO_UNICAST)) || 246 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) || 247 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, 248 !!(p->flags & BR_FLOOD)) || 249 nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD, 250 !!(p->flags & BR_MCAST_FLOOD)) || 251 nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD, 252 !!(p->flags & BR_BCAST_FLOOD)) || 253 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) || 254 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI, 255 !!(p->flags & BR_PROXYARP_WIFI)) || 256 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id), 257 &p->designated_root) || 258 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id), 259 &p->designated_bridge) || 260 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) || 261 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) || 262 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) || 263 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) || 264 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK, 265 p->topology_change_ack) || 266 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) || 267 nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags & 268 BR_VLAN_TUNNEL)) || 269 nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) || 270 nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS, 271 !!(p->flags & BR_NEIGH_SUPPRESS)) || 272 nla_put_u8(skb, IFLA_BRPORT_MRP_RING_OPEN, !!(p->flags & 273 BR_MRP_LOST_CONT)) || 274 nla_put_u8(skb, IFLA_BRPORT_MRP_IN_OPEN, 275 !!(p->flags & BR_MRP_LOST_IN_CONT)) || 276 nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)) || 277 nla_put_u8(skb, IFLA_BRPORT_LOCKED, !!(p->flags & BR_PORT_LOCKED))) 278 return -EMSGSIZE; 279 280 timerval = br_timer_value(&p->message_age_timer); 281 if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval, 282 IFLA_BRPORT_PAD)) 283 return -EMSGSIZE; 284 timerval = br_timer_value(&p->forward_delay_timer); 285 if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval, 286 IFLA_BRPORT_PAD)) 287 return -EMSGSIZE; 288 timerval = br_timer_value(&p->hold_timer); 289 if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval, 290 IFLA_BRPORT_PAD)) 291 return -EMSGSIZE; 292 293 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 294 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER, 295 p->multicast_ctx.multicast_router) || 296 nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT, 297 p->multicast_eht_hosts_limit) || 298 nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_CNT, 299 p->multicast_eht_hosts_cnt)) 300 return -EMSGSIZE; 301 #endif 302 303 /* we might be called only with br->lock */ 304 rcu_read_lock(); 305 backup_p = rcu_dereference(p->backup_port); 306 if (backup_p) 307 nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT, 308 backup_p->dev->ifindex); 309 rcu_read_unlock(); 310 311 return 0; 312 } 313 314 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start, 315 u16 vid_end, u16 flags) 316 { 317 struct bridge_vlan_info vinfo; 318 319 if ((vid_end - vid_start) > 0) { 320 /* add range to skb */ 321 vinfo.vid = vid_start; 322 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN; 323 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 324 sizeof(vinfo), &vinfo)) 325 goto nla_put_failure; 326 327 vinfo.vid = vid_end; 328 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END; 329 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 330 sizeof(vinfo), &vinfo)) 331 goto nla_put_failure; 332 } else { 333 vinfo.vid = vid_start; 334 vinfo.flags = flags; 335 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 336 sizeof(vinfo), &vinfo)) 337 goto nla_put_failure; 338 } 339 340 return 0; 341 342 nla_put_failure: 343 return -EMSGSIZE; 344 } 345 346 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb, 347 struct net_bridge_vlan_group *vg) 348 { 349 struct net_bridge_vlan *v; 350 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0; 351 u16 flags, pvid; 352 int err = 0; 353 354 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan 355 * and mark vlan info with begin and end flags 356 * if vlaninfo represents a range 357 */ 358 pvid = br_get_pvid(vg); 359 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 360 flags = 0; 361 if (!br_vlan_should_use(v)) 362 continue; 363 if (v->vid == pvid) 364 flags |= BRIDGE_VLAN_INFO_PVID; 365 366 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 367 flags |= BRIDGE_VLAN_INFO_UNTAGGED; 368 369 if (vid_range_start == 0) { 370 goto initvars; 371 } else if ((v->vid - vid_range_end) == 1 && 372 flags == vid_range_flags) { 373 vid_range_end = v->vid; 374 continue; 375 } else { 376 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 377 vid_range_end, 378 vid_range_flags); 379 if (err) 380 return err; 381 } 382 383 initvars: 384 vid_range_start = v->vid; 385 vid_range_end = v->vid; 386 vid_range_flags = flags; 387 } 388 389 if (vid_range_start != 0) { 390 /* Call it once more to send any left over vlans */ 391 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 392 vid_range_end, 393 vid_range_flags); 394 if (err) 395 return err; 396 } 397 398 return 0; 399 } 400 401 static int br_fill_ifvlaninfo(struct sk_buff *skb, 402 struct net_bridge_vlan_group *vg) 403 { 404 struct bridge_vlan_info vinfo; 405 struct net_bridge_vlan *v; 406 u16 pvid; 407 408 pvid = br_get_pvid(vg); 409 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 410 if (!br_vlan_should_use(v)) 411 continue; 412 413 vinfo.vid = v->vid; 414 vinfo.flags = 0; 415 if (v->vid == pvid) 416 vinfo.flags |= BRIDGE_VLAN_INFO_PVID; 417 418 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 419 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 420 421 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 422 sizeof(vinfo), &vinfo)) 423 goto nla_put_failure; 424 } 425 426 return 0; 427 428 nla_put_failure: 429 return -EMSGSIZE; 430 } 431 432 /* 433 * Create one netlink message for one interface 434 * Contains port and master info as well as carrier and bridge state. 435 */ 436 static int br_fill_ifinfo(struct sk_buff *skb, 437 const struct net_bridge_port *port, 438 u32 pid, u32 seq, int event, unsigned int flags, 439 u32 filter_mask, const struct net_device *dev, 440 bool getlink) 441 { 442 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 443 struct nlattr *af = NULL; 444 struct net_bridge *br; 445 struct ifinfomsg *hdr; 446 struct nlmsghdr *nlh; 447 448 if (port) 449 br = port->br; 450 else 451 br = netdev_priv(dev); 452 453 br_debug(br, "br_fill_info event %d port %s master %s\n", 454 event, dev->name, br->dev->name); 455 456 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); 457 if (nlh == NULL) 458 return -EMSGSIZE; 459 460 hdr = nlmsg_data(nlh); 461 hdr->ifi_family = AF_BRIDGE; 462 hdr->__ifi_pad = 0; 463 hdr->ifi_type = dev->type; 464 hdr->ifi_index = dev->ifindex; 465 hdr->ifi_flags = dev_get_flags(dev); 466 hdr->ifi_change = 0; 467 468 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 469 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) || 470 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 471 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 472 (dev->addr_len && 473 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 474 (dev->ifindex != dev_get_iflink(dev) && 475 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 476 goto nla_put_failure; 477 478 if (event == RTM_NEWLINK && port) { 479 struct nlattr *nest; 480 481 nest = nla_nest_start(skb, IFLA_PROTINFO); 482 if (nest == NULL || br_port_fill_attrs(skb, port) < 0) 483 goto nla_put_failure; 484 nla_nest_end(skb, nest); 485 } 486 487 if (filter_mask & (RTEXT_FILTER_BRVLAN | 488 RTEXT_FILTER_BRVLAN_COMPRESSED | 489 RTEXT_FILTER_MRP | 490 RTEXT_FILTER_CFM_CONFIG | 491 RTEXT_FILTER_CFM_STATUS | 492 RTEXT_FILTER_MST)) { 493 af = nla_nest_start_noflag(skb, IFLA_AF_SPEC); 494 if (!af) 495 goto nla_put_failure; 496 } 497 498 /* Check if the VID information is requested */ 499 if ((filter_mask & RTEXT_FILTER_BRVLAN) || 500 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { 501 struct net_bridge_vlan_group *vg; 502 int err; 503 504 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */ 505 rcu_read_lock(); 506 if (port) 507 vg = nbp_vlan_group_rcu(port); 508 else 509 vg = br_vlan_group_rcu(br); 510 511 if (!vg || !vg->num_vlans) { 512 rcu_read_unlock(); 513 goto done; 514 } 515 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) 516 err = br_fill_ifvlaninfo_compressed(skb, vg); 517 else 518 err = br_fill_ifvlaninfo(skb, vg); 519 520 if (port && (port->flags & BR_VLAN_TUNNEL)) 521 err = br_fill_vlan_tunnel_info(skb, vg); 522 rcu_read_unlock(); 523 if (err) 524 goto nla_put_failure; 525 } 526 527 if (filter_mask & RTEXT_FILTER_MRP) { 528 int err; 529 530 if (!br_mrp_enabled(br) || port) 531 goto done; 532 533 rcu_read_lock(); 534 err = br_mrp_fill_info(skb, br); 535 rcu_read_unlock(); 536 537 if (err) 538 goto nla_put_failure; 539 } 540 541 if (filter_mask & (RTEXT_FILTER_CFM_CONFIG | RTEXT_FILTER_CFM_STATUS)) { 542 struct nlattr *cfm_nest = NULL; 543 int err; 544 545 if (!br_cfm_created(br) || port) 546 goto done; 547 548 cfm_nest = nla_nest_start(skb, IFLA_BRIDGE_CFM); 549 if (!cfm_nest) 550 goto nla_put_failure; 551 552 if (filter_mask & RTEXT_FILTER_CFM_CONFIG) { 553 rcu_read_lock(); 554 err = br_cfm_config_fill_info(skb, br); 555 rcu_read_unlock(); 556 if (err) 557 goto nla_put_failure; 558 } 559 560 if (filter_mask & RTEXT_FILTER_CFM_STATUS) { 561 rcu_read_lock(); 562 err = br_cfm_status_fill_info(skb, br, getlink); 563 rcu_read_unlock(); 564 if (err) 565 goto nla_put_failure; 566 } 567 568 nla_nest_end(skb, cfm_nest); 569 } 570 571 if ((filter_mask & RTEXT_FILTER_MST) && 572 br_opt_get(br, BROPT_MST_ENABLED) && port) { 573 const struct net_bridge_vlan_group *vg = nbp_vlan_group(port); 574 struct nlattr *mst_nest; 575 int err; 576 577 if (!vg || !vg->num_vlans) 578 goto done; 579 580 mst_nest = nla_nest_start(skb, IFLA_BRIDGE_MST); 581 if (!mst_nest) 582 goto nla_put_failure; 583 584 err = br_mst_fill_info(skb, vg); 585 if (err) 586 goto nla_put_failure; 587 588 nla_nest_end(skb, mst_nest); 589 } 590 591 done: 592 if (af) { 593 if (nlmsg_get_pos(skb) - (void *)af > nla_attr_size(0)) 594 nla_nest_end(skb, af); 595 else 596 nla_nest_cancel(skb, af); 597 } 598 599 nlmsg_end(skb, nlh); 600 return 0; 601 602 nla_put_failure: 603 nlmsg_cancel(skb, nlh); 604 return -EMSGSIZE; 605 } 606 607 void br_info_notify(int event, const struct net_bridge *br, 608 const struct net_bridge_port *port, u32 filter) 609 { 610 struct net_device *dev; 611 struct sk_buff *skb; 612 int err = -ENOBUFS; 613 struct net *net; 614 u16 port_no = 0; 615 616 if (WARN_ON(!port && !br)) 617 return; 618 619 if (port) { 620 dev = port->dev; 621 br = port->br; 622 port_no = port->port_no; 623 } else { 624 dev = br->dev; 625 } 626 627 net = dev_net(dev); 628 br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event); 629 630 skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC); 631 if (skb == NULL) 632 goto errout; 633 634 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev, false); 635 if (err < 0) { 636 /* -EMSGSIZE implies BUG in br_nlmsg_size() */ 637 WARN_ON(err == -EMSGSIZE); 638 kfree_skb(skb); 639 goto errout; 640 } 641 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 642 return; 643 errout: 644 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 645 } 646 647 /* Notify listeners of a change in bridge or port information */ 648 void br_ifinfo_notify(int event, const struct net_bridge *br, 649 const struct net_bridge_port *port) 650 { 651 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED; 652 653 return br_info_notify(event, br, port, filter); 654 } 655 656 /* 657 * Dump information about all ports, in response to GETLINK 658 */ 659 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 660 struct net_device *dev, u32 filter_mask, int nlflags) 661 { 662 struct net_bridge_port *port = br_port_get_rtnl(dev); 663 664 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) && 665 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) && 666 !(filter_mask & RTEXT_FILTER_MRP) && 667 !(filter_mask & RTEXT_FILTER_CFM_CONFIG) && 668 !(filter_mask & RTEXT_FILTER_CFM_STATUS)) 669 return 0; 670 671 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags, 672 filter_mask, dev, true); 673 } 674 675 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p, 676 int cmd, struct bridge_vlan_info *vinfo, bool *changed, 677 struct netlink_ext_ack *extack) 678 { 679 bool curr_change; 680 int err = 0; 681 682 switch (cmd) { 683 case RTM_SETLINK: 684 if (p) { 685 /* if the MASTER flag is set this will act on the global 686 * per-VLAN entry as well 687 */ 688 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags, 689 &curr_change, extack); 690 } else { 691 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY; 692 err = br_vlan_add(br, vinfo->vid, vinfo->flags, 693 &curr_change, extack); 694 } 695 if (curr_change) 696 *changed = true; 697 break; 698 699 case RTM_DELLINK: 700 if (p) { 701 if (!nbp_vlan_delete(p, vinfo->vid)) 702 *changed = true; 703 704 if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) && 705 !br_vlan_delete(p->br, vinfo->vid)) 706 *changed = true; 707 } else if (!br_vlan_delete(br, vinfo->vid)) { 708 *changed = true; 709 } 710 break; 711 } 712 713 return err; 714 } 715 716 int br_process_vlan_info(struct net_bridge *br, 717 struct net_bridge_port *p, int cmd, 718 struct bridge_vlan_info *vinfo_curr, 719 struct bridge_vlan_info **vinfo_last, 720 bool *changed, 721 struct netlink_ext_ack *extack) 722 { 723 int err, rtm_cmd; 724 725 if (!br_vlan_valid_id(vinfo_curr->vid, extack)) 726 return -EINVAL; 727 728 /* needed for vlan-only NEWVLAN/DELVLAN notifications */ 729 rtm_cmd = br_afspec_cmd_to_rtm(cmd); 730 731 if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 732 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack)) 733 return -EINVAL; 734 *vinfo_last = vinfo_curr; 735 return 0; 736 } 737 738 if (*vinfo_last) { 739 struct bridge_vlan_info tmp_vinfo; 740 int v, v_change_start = 0; 741 742 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack)) 743 return -EINVAL; 744 745 memcpy(&tmp_vinfo, *vinfo_last, 746 sizeof(struct bridge_vlan_info)); 747 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) { 748 bool curr_change = false; 749 750 tmp_vinfo.vid = v; 751 err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change, 752 extack); 753 if (err) 754 break; 755 if (curr_change) { 756 *changed = curr_change; 757 if (!v_change_start) 758 v_change_start = v; 759 } else { 760 /* nothing to notify yet */ 761 if (!v_change_start) 762 continue; 763 br_vlan_notify(br, p, v_change_start, 764 v - 1, rtm_cmd); 765 v_change_start = 0; 766 } 767 cond_resched(); 768 } 769 /* v_change_start is set only if the last/whole range changed */ 770 if (v_change_start) 771 br_vlan_notify(br, p, v_change_start, 772 v - 1, rtm_cmd); 773 774 *vinfo_last = NULL; 775 776 return err; 777 } 778 779 err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack); 780 if (*changed) 781 br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd); 782 783 return err; 784 } 785 786 static int br_afspec(struct net_bridge *br, 787 struct net_bridge_port *p, 788 struct nlattr *af_spec, 789 int cmd, bool *changed, 790 struct netlink_ext_ack *extack) 791 { 792 struct bridge_vlan_info *vinfo_curr = NULL; 793 struct bridge_vlan_info *vinfo_last = NULL; 794 struct nlattr *attr; 795 struct vtunnel_info tinfo_last = {}; 796 struct vtunnel_info tinfo_curr = {}; 797 int err = 0, rem; 798 799 nla_for_each_nested(attr, af_spec, rem) { 800 err = 0; 801 switch (nla_type(attr)) { 802 case IFLA_BRIDGE_VLAN_TUNNEL_INFO: 803 if (!p || !(p->flags & BR_VLAN_TUNNEL)) 804 return -EINVAL; 805 err = br_parse_vlan_tunnel_info(attr, &tinfo_curr); 806 if (err) 807 return err; 808 err = br_process_vlan_tunnel_info(br, p, cmd, 809 &tinfo_curr, 810 &tinfo_last, 811 changed); 812 if (err) 813 return err; 814 break; 815 case IFLA_BRIDGE_VLAN_INFO: 816 if (nla_len(attr) != sizeof(struct bridge_vlan_info)) 817 return -EINVAL; 818 vinfo_curr = nla_data(attr); 819 err = br_process_vlan_info(br, p, cmd, vinfo_curr, 820 &vinfo_last, changed, 821 extack); 822 if (err) 823 return err; 824 break; 825 case IFLA_BRIDGE_MRP: 826 err = br_mrp_parse(br, p, attr, cmd, extack); 827 if (err) 828 return err; 829 break; 830 case IFLA_BRIDGE_CFM: 831 err = br_cfm_parse(br, p, attr, cmd, extack); 832 if (err) 833 return err; 834 break; 835 case IFLA_BRIDGE_MST: 836 if (!p) { 837 NL_SET_ERR_MSG(extack, 838 "MST states can only be set on bridge ports"); 839 return -EINVAL; 840 } 841 842 if (cmd != RTM_SETLINK) { 843 NL_SET_ERR_MSG(extack, 844 "MST states can only be set through RTM_SETLINK"); 845 return -EINVAL; 846 } 847 848 err = br_mst_process(p, attr, extack); 849 if (err) 850 return err; 851 break; 852 } 853 } 854 855 return err; 856 } 857 858 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = { 859 [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, 860 [IFLA_BRPORT_COST] = { .type = NLA_U32 }, 861 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, 862 [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, 863 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, 864 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, 865 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 }, 866 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, 867 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, 868 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 }, 869 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 }, 870 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 }, 871 [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 }, 872 [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 }, 873 [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 }, 874 [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 }, 875 [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 }, 876 [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 }, 877 [IFLA_BRPORT_ISOLATED] = { .type = NLA_U8 }, 878 [IFLA_BRPORT_LOCKED] = { .type = NLA_U8 }, 879 [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 }, 880 [IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT] = { .type = NLA_U32 }, 881 }; 882 883 /* Change the state of the port and notify spanning tree */ 884 static int br_set_port_state(struct net_bridge_port *p, u8 state) 885 { 886 if (state > BR_STATE_BLOCKING) 887 return -EINVAL; 888 889 /* if kernel STP is running, don't allow changes */ 890 if (p->br->stp_enabled == BR_KERNEL_STP) 891 return -EBUSY; 892 893 /* if device is not up, change is not allowed 894 * if link is not present, only allowable state is disabled 895 */ 896 if (!netif_running(p->dev) || 897 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED)) 898 return -ENETDOWN; 899 900 br_set_state(p, state); 901 br_port_state_selection(p->br); 902 return 0; 903 } 904 905 /* Set/clear or port flags based on attribute */ 906 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[], 907 int attrtype, unsigned long mask) 908 { 909 if (!tb[attrtype]) 910 return; 911 912 if (nla_get_u8(tb[attrtype])) 913 p->flags |= mask; 914 else 915 p->flags &= ~mask; 916 } 917 918 /* Process bridge protocol info on port */ 919 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[], 920 struct netlink_ext_ack *extack) 921 { 922 unsigned long old_flags, changed_mask; 923 bool br_vlan_tunnel_old; 924 int err; 925 926 old_flags = p->flags; 927 br_vlan_tunnel_old = (old_flags & BR_VLAN_TUNNEL) ? true : false; 928 929 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE); 930 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD); 931 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, 932 BR_MULTICAST_FAST_LEAVE); 933 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK); 934 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING); 935 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD); 936 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD); 937 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, 938 BR_MULTICAST_TO_UNICAST); 939 br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD); 940 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP); 941 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI); 942 br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL); 943 br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS, BR_NEIGH_SUPPRESS); 944 br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED); 945 br_set_port_flag(p, tb, IFLA_BRPORT_LOCKED, BR_PORT_LOCKED); 946 947 changed_mask = old_flags ^ p->flags; 948 949 err = br_switchdev_set_port_flag(p, p->flags, changed_mask, extack); 950 if (err) { 951 p->flags = old_flags; 952 return err; 953 } 954 955 if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL)) 956 nbp_vlan_tunnel_info_flush(p); 957 958 br_port_flags_change(p, changed_mask); 959 960 if (tb[IFLA_BRPORT_COST]) { 961 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST])); 962 if (err) 963 return err; 964 } 965 966 if (tb[IFLA_BRPORT_PRIORITY]) { 967 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY])); 968 if (err) 969 return err; 970 } 971 972 if (tb[IFLA_BRPORT_STATE]) { 973 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE])); 974 if (err) 975 return err; 976 } 977 978 if (tb[IFLA_BRPORT_FLUSH]) 979 br_fdb_delete_by_port(p->br, p, 0, 0); 980 981 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 982 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) { 983 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]); 984 985 err = br_multicast_set_port_router(&p->multicast_ctx, 986 mcast_router); 987 if (err) 988 return err; 989 } 990 991 if (tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]) { 992 u32 hlimit; 993 994 hlimit = nla_get_u32(tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]); 995 err = br_multicast_eht_set_hosts_limit(p, hlimit); 996 if (err) 997 return err; 998 } 999 #endif 1000 1001 if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) { 1002 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]); 1003 1004 if (fwd_mask & BR_GROUPFWD_MACPAUSE) 1005 return -EINVAL; 1006 p->group_fwd_mask = fwd_mask; 1007 } 1008 1009 if (tb[IFLA_BRPORT_BACKUP_PORT]) { 1010 struct net_device *backup_dev = NULL; 1011 u32 backup_ifindex; 1012 1013 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]); 1014 if (backup_ifindex) { 1015 backup_dev = __dev_get_by_index(dev_net(p->dev), 1016 backup_ifindex); 1017 if (!backup_dev) 1018 return -ENOENT; 1019 } 1020 1021 err = nbp_backup_change(p, backup_dev); 1022 if (err) 1023 return err; 1024 } 1025 1026 return 0; 1027 } 1028 1029 /* Change state and parameters on port. */ 1030 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags, 1031 struct netlink_ext_ack *extack) 1032 { 1033 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev); 1034 struct nlattr *tb[IFLA_BRPORT_MAX + 1]; 1035 struct net_bridge_port *p; 1036 struct nlattr *protinfo; 1037 struct nlattr *afspec; 1038 bool changed = false; 1039 int err = 0; 1040 1041 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO); 1042 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 1043 if (!protinfo && !afspec) 1044 return 0; 1045 1046 p = br_port_get_rtnl(dev); 1047 /* We want to accept dev as bridge itself if the AF_SPEC 1048 * is set to see if someone is setting vlan info on the bridge 1049 */ 1050 if (!p && !afspec) 1051 return -EINVAL; 1052 1053 if (p && protinfo) { 1054 if (protinfo->nla_type & NLA_F_NESTED) { 1055 err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX, 1056 protinfo, 1057 br_port_policy, 1058 NULL); 1059 if (err) 1060 return err; 1061 1062 spin_lock_bh(&p->br->lock); 1063 err = br_setport(p, tb, extack); 1064 spin_unlock_bh(&p->br->lock); 1065 } else { 1066 /* Binary compatibility with old RSTP */ 1067 if (nla_len(protinfo) < sizeof(u8)) 1068 return -EINVAL; 1069 1070 spin_lock_bh(&p->br->lock); 1071 err = br_set_port_state(p, nla_get_u8(protinfo)); 1072 spin_unlock_bh(&p->br->lock); 1073 } 1074 if (err) 1075 goto out; 1076 changed = true; 1077 } 1078 1079 if (afspec) 1080 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack); 1081 1082 if (changed) 1083 br_ifinfo_notify(RTM_NEWLINK, br, p); 1084 out: 1085 return err; 1086 } 1087 1088 /* Delete port information */ 1089 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 1090 { 1091 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev); 1092 struct net_bridge_port *p; 1093 struct nlattr *afspec; 1094 bool changed = false; 1095 int err = 0; 1096 1097 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 1098 if (!afspec) 1099 return 0; 1100 1101 p = br_port_get_rtnl(dev); 1102 /* We want to accept dev as bridge itself as well */ 1103 if (!p && !netif_is_bridge_master(dev)) 1104 return -EINVAL; 1105 1106 err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL); 1107 if (changed) 1108 /* Send RTM_NEWLINK because userspace 1109 * expects RTM_NEWLINK for vlan dels 1110 */ 1111 br_ifinfo_notify(RTM_NEWLINK, br, p); 1112 1113 return err; 1114 } 1115 1116 static int br_validate(struct nlattr *tb[], struct nlattr *data[], 1117 struct netlink_ext_ack *extack) 1118 { 1119 if (tb[IFLA_ADDRESS]) { 1120 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 1121 return -EINVAL; 1122 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 1123 return -EADDRNOTAVAIL; 1124 } 1125 1126 if (!data) 1127 return 0; 1128 1129 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1130 if (data[IFLA_BR_VLAN_PROTOCOL] && 1131 !eth_type_vlan(nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]))) 1132 return -EPROTONOSUPPORT; 1133 1134 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { 1135 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); 1136 1137 if (defpvid >= VLAN_VID_MASK) 1138 return -EINVAL; 1139 } 1140 #endif 1141 1142 return 0; 1143 } 1144 1145 static int br_port_slave_changelink(struct net_device *brdev, 1146 struct net_device *dev, 1147 struct nlattr *tb[], 1148 struct nlattr *data[], 1149 struct netlink_ext_ack *extack) 1150 { 1151 struct net_bridge *br = netdev_priv(brdev); 1152 int ret; 1153 1154 if (!data) 1155 return 0; 1156 1157 spin_lock_bh(&br->lock); 1158 ret = br_setport(br_port_get_rtnl(dev), data, extack); 1159 spin_unlock_bh(&br->lock); 1160 1161 return ret; 1162 } 1163 1164 static int br_port_fill_slave_info(struct sk_buff *skb, 1165 const struct net_device *brdev, 1166 const struct net_device *dev) 1167 { 1168 return br_port_fill_attrs(skb, br_port_get_rtnl(dev)); 1169 } 1170 1171 static size_t br_port_get_slave_size(const struct net_device *brdev, 1172 const struct net_device *dev) 1173 { 1174 return br_port_info_size(); 1175 } 1176 1177 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = { 1178 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 }, 1179 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 }, 1180 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 }, 1181 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 }, 1182 [IFLA_BR_STP_STATE] = { .type = NLA_U32 }, 1183 [IFLA_BR_PRIORITY] = { .type = NLA_U16 }, 1184 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 }, 1185 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 }, 1186 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 }, 1187 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY, 1188 .len = ETH_ALEN }, 1189 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 }, 1190 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 }, 1191 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 }, 1192 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 }, 1193 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 }, 1194 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 }, 1195 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 }, 1196 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 }, 1197 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 }, 1198 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 }, 1199 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 }, 1200 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 }, 1201 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 }, 1202 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 }, 1203 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 }, 1204 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 }, 1205 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 }, 1206 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 }, 1207 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 }, 1208 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 }, 1209 [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 }, 1210 [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 }, 1211 [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 }, 1212 [IFLA_BR_MULTI_BOOLOPT] = 1213 NLA_POLICY_EXACT_LEN(sizeof(struct br_boolopt_multi)), 1214 }; 1215 1216 static int br_changelink(struct net_device *brdev, struct nlattr *tb[], 1217 struct nlattr *data[], 1218 struct netlink_ext_ack *extack) 1219 { 1220 struct net_bridge *br = netdev_priv(brdev); 1221 int err; 1222 1223 if (!data) 1224 return 0; 1225 1226 if (data[IFLA_BR_FORWARD_DELAY]) { 1227 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY])); 1228 if (err) 1229 return err; 1230 } 1231 1232 if (data[IFLA_BR_HELLO_TIME]) { 1233 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME])); 1234 if (err) 1235 return err; 1236 } 1237 1238 if (data[IFLA_BR_MAX_AGE]) { 1239 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE])); 1240 if (err) 1241 return err; 1242 } 1243 1244 if (data[IFLA_BR_AGEING_TIME]) { 1245 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME])); 1246 if (err) 1247 return err; 1248 } 1249 1250 if (data[IFLA_BR_STP_STATE]) { 1251 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]); 1252 1253 err = br_stp_set_enabled(br, stp_enabled, extack); 1254 if (err) 1255 return err; 1256 } 1257 1258 if (data[IFLA_BR_PRIORITY]) { 1259 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]); 1260 1261 br_stp_set_bridge_priority(br, priority); 1262 } 1263 1264 if (data[IFLA_BR_VLAN_FILTERING]) { 1265 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]); 1266 1267 err = br_vlan_filter_toggle(br, vlan_filter, extack); 1268 if (err) 1269 return err; 1270 } 1271 1272 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1273 if (data[IFLA_BR_VLAN_PROTOCOL]) { 1274 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]); 1275 1276 err = __br_vlan_set_proto(br, vlan_proto, extack); 1277 if (err) 1278 return err; 1279 } 1280 1281 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { 1282 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); 1283 1284 err = __br_vlan_set_default_pvid(br, defpvid, extack); 1285 if (err) 1286 return err; 1287 } 1288 1289 if (data[IFLA_BR_VLAN_STATS_ENABLED]) { 1290 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]); 1291 1292 err = br_vlan_set_stats(br, vlan_stats); 1293 if (err) 1294 return err; 1295 } 1296 1297 if (data[IFLA_BR_VLAN_STATS_PER_PORT]) { 1298 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]); 1299 1300 err = br_vlan_set_stats_per_port(br, per_port); 1301 if (err) 1302 return err; 1303 } 1304 #endif 1305 1306 if (data[IFLA_BR_GROUP_FWD_MASK]) { 1307 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]); 1308 1309 if (fwd_mask & BR_GROUPFWD_RESTRICTED) 1310 return -EINVAL; 1311 br->group_fwd_mask = fwd_mask; 1312 } 1313 1314 if (data[IFLA_BR_GROUP_ADDR]) { 1315 u8 new_addr[ETH_ALEN]; 1316 1317 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN) 1318 return -EINVAL; 1319 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN); 1320 if (!is_link_local_ether_addr(new_addr)) 1321 return -EINVAL; 1322 if (new_addr[5] == 1 || /* 802.3x Pause address */ 1323 new_addr[5] == 2 || /* 802.3ad Slow protocols */ 1324 new_addr[5] == 3) /* 802.1X PAE address */ 1325 return -EINVAL; 1326 spin_lock_bh(&br->lock); 1327 memcpy(br->group_addr, new_addr, sizeof(br->group_addr)); 1328 spin_unlock_bh(&br->lock); 1329 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true); 1330 br_recalculate_fwd_mask(br); 1331 } 1332 1333 if (data[IFLA_BR_FDB_FLUSH]) { 1334 struct net_bridge_fdb_flush_desc desc = { 1335 .flags_mask = BR_FDB_STATIC 1336 }; 1337 1338 br_fdb_flush(br, &desc); 1339 } 1340 1341 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1342 if (data[IFLA_BR_MCAST_ROUTER]) { 1343 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]); 1344 1345 err = br_multicast_set_router(&br->multicast_ctx, 1346 multicast_router); 1347 if (err) 1348 return err; 1349 } 1350 1351 if (data[IFLA_BR_MCAST_SNOOPING]) { 1352 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]); 1353 1354 err = br_multicast_toggle(br, mcast_snooping, extack); 1355 if (err) 1356 return err; 1357 } 1358 1359 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) { 1360 u8 val; 1361 1362 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]); 1363 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val); 1364 } 1365 1366 if (data[IFLA_BR_MCAST_QUERIER]) { 1367 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]); 1368 1369 err = br_multicast_set_querier(&br->multicast_ctx, 1370 mcast_querier); 1371 if (err) 1372 return err; 1373 } 1374 1375 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) 1376 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n", 1377 RHT_ELASTICITY); 1378 1379 if (data[IFLA_BR_MCAST_HASH_MAX]) 1380 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]); 1381 1382 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) { 1383 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]); 1384 1385 br->multicast_ctx.multicast_last_member_count = val; 1386 } 1387 1388 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) { 1389 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]); 1390 1391 br->multicast_ctx.multicast_startup_query_count = val; 1392 } 1393 1394 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) { 1395 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]); 1396 1397 br->multicast_ctx.multicast_last_member_interval = clock_t_to_jiffies(val); 1398 } 1399 1400 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) { 1401 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]); 1402 1403 br->multicast_ctx.multicast_membership_interval = clock_t_to_jiffies(val); 1404 } 1405 1406 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) { 1407 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]); 1408 1409 br->multicast_ctx.multicast_querier_interval = clock_t_to_jiffies(val); 1410 } 1411 1412 if (data[IFLA_BR_MCAST_QUERY_INTVL]) { 1413 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]); 1414 1415 br_multicast_set_query_intvl(&br->multicast_ctx, val); 1416 } 1417 1418 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) { 1419 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]); 1420 1421 br->multicast_ctx.multicast_query_response_interval = clock_t_to_jiffies(val); 1422 } 1423 1424 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) { 1425 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]); 1426 1427 br_multicast_set_startup_query_intvl(&br->multicast_ctx, val); 1428 } 1429 1430 if (data[IFLA_BR_MCAST_STATS_ENABLED]) { 1431 __u8 mcast_stats; 1432 1433 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]); 1434 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats); 1435 } 1436 1437 if (data[IFLA_BR_MCAST_IGMP_VERSION]) { 1438 __u8 igmp_version; 1439 1440 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]); 1441 err = br_multicast_set_igmp_version(&br->multicast_ctx, 1442 igmp_version); 1443 if (err) 1444 return err; 1445 } 1446 1447 #if IS_ENABLED(CONFIG_IPV6) 1448 if (data[IFLA_BR_MCAST_MLD_VERSION]) { 1449 __u8 mld_version; 1450 1451 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]); 1452 err = br_multicast_set_mld_version(&br->multicast_ctx, 1453 mld_version); 1454 if (err) 1455 return err; 1456 } 1457 #endif 1458 #endif 1459 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1460 if (data[IFLA_BR_NF_CALL_IPTABLES]) { 1461 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]); 1462 1463 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val); 1464 } 1465 1466 if (data[IFLA_BR_NF_CALL_IP6TABLES]) { 1467 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]); 1468 1469 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val); 1470 } 1471 1472 if (data[IFLA_BR_NF_CALL_ARPTABLES]) { 1473 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]); 1474 1475 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val); 1476 } 1477 #endif 1478 1479 if (data[IFLA_BR_MULTI_BOOLOPT]) { 1480 struct br_boolopt_multi *bm; 1481 1482 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]); 1483 err = br_boolopt_multi_toggle(br, bm, extack); 1484 if (err) 1485 return err; 1486 } 1487 1488 return 0; 1489 } 1490 1491 static int br_dev_newlink(struct net *src_net, struct net_device *dev, 1492 struct nlattr *tb[], struct nlattr *data[], 1493 struct netlink_ext_ack *extack) 1494 { 1495 struct net_bridge *br = netdev_priv(dev); 1496 int err; 1497 1498 err = register_netdevice(dev); 1499 if (err) 1500 return err; 1501 1502 if (tb[IFLA_ADDRESS]) { 1503 spin_lock_bh(&br->lock); 1504 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS])); 1505 spin_unlock_bh(&br->lock); 1506 } 1507 1508 err = br_changelink(dev, tb, data, extack); 1509 if (err) 1510 br_dev_delete(dev, NULL); 1511 1512 return err; 1513 } 1514 1515 static size_t br_get_size(const struct net_device *brdev) 1516 { 1517 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */ 1518 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */ 1519 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */ 1520 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */ 1521 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */ 1522 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */ 1523 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */ 1524 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1525 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */ 1526 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */ 1527 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */ 1528 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_PER_PORT */ 1529 #endif 1530 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */ 1531 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */ 1532 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */ 1533 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */ 1534 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */ 1535 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */ 1536 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */ 1537 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */ 1538 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */ 1539 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */ 1540 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */ 1541 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */ 1542 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1543 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */ 1544 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */ 1545 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */ 1546 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */ 1547 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */ 1548 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */ 1549 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */ 1550 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */ 1551 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */ 1552 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */ 1553 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */ 1554 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */ 1555 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */ 1556 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */ 1557 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */ 1558 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */ 1559 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */ 1560 br_multicast_querier_state_size() + /* IFLA_BR_MCAST_QUERIER_STATE */ 1561 #endif 1562 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1563 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */ 1564 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */ 1565 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */ 1566 #endif 1567 nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */ 1568 0; 1569 } 1570 1571 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev) 1572 { 1573 struct net_bridge *br = netdev_priv(brdev); 1574 u32 forward_delay = jiffies_to_clock_t(br->forward_delay); 1575 u32 hello_time = jiffies_to_clock_t(br->hello_time); 1576 u32 age_time = jiffies_to_clock_t(br->max_age); 1577 u32 ageing_time = jiffies_to_clock_t(br->ageing_time); 1578 u32 stp_enabled = br->stp_enabled; 1579 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]; 1580 u8 vlan_enabled = br_vlan_enabled(br->dev); 1581 struct br_boolopt_multi bm; 1582 u64 clockval; 1583 1584 clockval = br_timer_value(&br->hello_timer); 1585 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD)) 1586 return -EMSGSIZE; 1587 clockval = br_timer_value(&br->tcn_timer); 1588 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD)) 1589 return -EMSGSIZE; 1590 clockval = br_timer_value(&br->topology_change_timer); 1591 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval, 1592 IFLA_BR_PAD)) 1593 return -EMSGSIZE; 1594 clockval = br_timer_value(&br->gc_work.timer); 1595 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD)) 1596 return -EMSGSIZE; 1597 1598 br_boolopt_multi_get(br, &bm); 1599 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) || 1600 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) || 1601 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) || 1602 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) || 1603 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) || 1604 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) || 1605 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) || 1606 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) || 1607 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id), 1608 &br->bridge_id) || 1609 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id), 1610 &br->designated_root) || 1611 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) || 1612 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) || 1613 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) || 1614 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED, 1615 br->topology_change_detected) || 1616 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) || 1617 nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm)) 1618 return -EMSGSIZE; 1619 1620 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1621 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) || 1622 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) || 1623 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, 1624 br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) || 1625 nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT, 1626 br_opt_get(br, BROPT_VLAN_STATS_PER_PORT))) 1627 return -EMSGSIZE; 1628 #endif 1629 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1630 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, 1631 br->multicast_ctx.multicast_router) || 1632 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, 1633 br_opt_get(br, BROPT_MULTICAST_ENABLED)) || 1634 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR, 1635 br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) || 1636 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, 1637 br->multicast_ctx.multicast_querier) || 1638 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED, 1639 br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) || 1640 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) || 1641 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) || 1642 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT, 1643 br->multicast_ctx.multicast_last_member_count) || 1644 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT, 1645 br->multicast_ctx.multicast_startup_query_count) || 1646 nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION, 1647 br->multicast_ctx.multicast_igmp_version) || 1648 br_multicast_dump_querier_state(skb, &br->multicast_ctx, 1649 IFLA_BR_MCAST_QUERIER_STATE)) 1650 return -EMSGSIZE; 1651 #if IS_ENABLED(CONFIG_IPV6) 1652 if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION, 1653 br->multicast_ctx.multicast_mld_version)) 1654 return -EMSGSIZE; 1655 #endif 1656 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_last_member_interval); 1657 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval, 1658 IFLA_BR_PAD)) 1659 return -EMSGSIZE; 1660 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_membership_interval); 1661 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval, 1662 IFLA_BR_PAD)) 1663 return -EMSGSIZE; 1664 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_querier_interval); 1665 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval, 1666 IFLA_BR_PAD)) 1667 return -EMSGSIZE; 1668 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_interval); 1669 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval, 1670 IFLA_BR_PAD)) 1671 return -EMSGSIZE; 1672 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_response_interval); 1673 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval, 1674 IFLA_BR_PAD)) 1675 return -EMSGSIZE; 1676 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_startup_query_interval); 1677 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval, 1678 IFLA_BR_PAD)) 1679 return -EMSGSIZE; 1680 #endif 1681 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1682 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES, 1683 br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) || 1684 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES, 1685 br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) || 1686 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES, 1687 br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0)) 1688 return -EMSGSIZE; 1689 #endif 1690 1691 return 0; 1692 } 1693 1694 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr) 1695 { 1696 struct net_bridge_port *p = NULL; 1697 struct net_bridge_vlan_group *vg; 1698 struct net_bridge_vlan *v; 1699 struct net_bridge *br; 1700 int numvls = 0; 1701 1702 switch (attr) { 1703 case IFLA_STATS_LINK_XSTATS: 1704 br = netdev_priv(dev); 1705 vg = br_vlan_group(br); 1706 break; 1707 case IFLA_STATS_LINK_XSTATS_SLAVE: 1708 p = br_port_get_rtnl(dev); 1709 if (!p) 1710 return 0; 1711 vg = nbp_vlan_group(p); 1712 break; 1713 default: 1714 return 0; 1715 } 1716 1717 if (vg) { 1718 /* we need to count all, even placeholder entries */ 1719 list_for_each_entry(v, &vg->vlan_list, vlist) 1720 numvls++; 1721 } 1722 1723 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) + 1724 nla_total_size_64bit(sizeof(struct br_mcast_stats)) + 1725 (p ? nla_total_size_64bit(sizeof(p->stp_xstats)) : 0) + 1726 nla_total_size(0); 1727 } 1728 1729 static int br_fill_linkxstats(struct sk_buff *skb, 1730 const struct net_device *dev, 1731 int *prividx, int attr) 1732 { 1733 struct nlattr *nla __maybe_unused; 1734 struct net_bridge_port *p = NULL; 1735 struct net_bridge_vlan_group *vg; 1736 struct net_bridge_vlan *v; 1737 struct net_bridge *br; 1738 struct nlattr *nest; 1739 int vl_idx = 0; 1740 1741 switch (attr) { 1742 case IFLA_STATS_LINK_XSTATS: 1743 br = netdev_priv(dev); 1744 vg = br_vlan_group(br); 1745 break; 1746 case IFLA_STATS_LINK_XSTATS_SLAVE: 1747 p = br_port_get_rtnl(dev); 1748 if (!p) 1749 return 0; 1750 br = p->br; 1751 vg = nbp_vlan_group(p); 1752 break; 1753 default: 1754 return -EINVAL; 1755 } 1756 1757 nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE); 1758 if (!nest) 1759 return -EMSGSIZE; 1760 1761 if (vg) { 1762 u16 pvid; 1763 1764 pvid = br_get_pvid(vg); 1765 list_for_each_entry(v, &vg->vlan_list, vlist) { 1766 struct bridge_vlan_xstats vxi; 1767 struct pcpu_sw_netstats stats; 1768 1769 if (++vl_idx < *prividx) 1770 continue; 1771 memset(&vxi, 0, sizeof(vxi)); 1772 vxi.vid = v->vid; 1773 vxi.flags = v->flags; 1774 if (v->vid == pvid) 1775 vxi.flags |= BRIDGE_VLAN_INFO_PVID; 1776 br_vlan_get_stats(v, &stats); 1777 vxi.rx_bytes = u64_stats_read(&stats.rx_bytes); 1778 vxi.rx_packets = u64_stats_read(&stats.rx_packets); 1779 vxi.tx_bytes = u64_stats_read(&stats.tx_bytes); 1780 vxi.tx_packets = u64_stats_read(&stats.tx_packets); 1781 1782 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi)) 1783 goto nla_put_failure; 1784 } 1785 } 1786 1787 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1788 if (++vl_idx >= *prividx) { 1789 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST, 1790 sizeof(struct br_mcast_stats), 1791 BRIDGE_XSTATS_PAD); 1792 if (!nla) 1793 goto nla_put_failure; 1794 br_multicast_get_stats(br, p, nla_data(nla)); 1795 } 1796 #endif 1797 1798 if (p) { 1799 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP, 1800 sizeof(p->stp_xstats), 1801 BRIDGE_XSTATS_PAD); 1802 if (!nla) 1803 goto nla_put_failure; 1804 1805 spin_lock_bh(&br->lock); 1806 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats)); 1807 spin_unlock_bh(&br->lock); 1808 } 1809 1810 nla_nest_end(skb, nest); 1811 *prividx = 0; 1812 1813 return 0; 1814 1815 nla_put_failure: 1816 nla_nest_end(skb, nest); 1817 *prividx = vl_idx; 1818 1819 return -EMSGSIZE; 1820 } 1821 1822 static struct rtnl_af_ops br_af_ops __read_mostly = { 1823 .family = AF_BRIDGE, 1824 .get_link_af_size = br_get_link_af_size_filtered, 1825 }; 1826 1827 struct rtnl_link_ops br_link_ops __read_mostly = { 1828 .kind = "bridge", 1829 .priv_size = sizeof(struct net_bridge), 1830 .setup = br_dev_setup, 1831 .maxtype = IFLA_BR_MAX, 1832 .policy = br_policy, 1833 .validate = br_validate, 1834 .newlink = br_dev_newlink, 1835 .changelink = br_changelink, 1836 .dellink = br_dev_delete, 1837 .get_size = br_get_size, 1838 .fill_info = br_fill_info, 1839 .fill_linkxstats = br_fill_linkxstats, 1840 .get_linkxstats_size = br_get_linkxstats_size, 1841 1842 .slave_maxtype = IFLA_BRPORT_MAX, 1843 .slave_policy = br_port_policy, 1844 .slave_changelink = br_port_slave_changelink, 1845 .get_slave_size = br_port_get_slave_size, 1846 .fill_slave_info = br_port_fill_slave_info, 1847 }; 1848 1849 int __init br_netlink_init(void) 1850 { 1851 int err; 1852 1853 br_mdb_init(); 1854 br_vlan_rtnl_init(); 1855 rtnl_af_register(&br_af_ops); 1856 1857 err = rtnl_link_register(&br_link_ops); 1858 if (err) 1859 goto out_af; 1860 1861 return 0; 1862 1863 out_af: 1864 rtnl_af_unregister(&br_af_ops); 1865 br_mdb_uninit(); 1866 return err; 1867 } 1868 1869 void br_netlink_fini(void) 1870 { 1871 br_mdb_uninit(); 1872 br_vlan_rtnl_uninit(); 1873 rtnl_af_unregister(&br_af_ops); 1874 rtnl_link_unregister(&br_link_ops); 1875 } 1876