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: 592 593 if (af) 594 nla_nest_end(skb, af); 595 nlmsg_end(skb, nlh); 596 return 0; 597 598 nla_put_failure: 599 nlmsg_cancel(skb, nlh); 600 return -EMSGSIZE; 601 } 602 603 void br_info_notify(int event, const struct net_bridge *br, 604 const struct net_bridge_port *port, u32 filter) 605 { 606 struct net_device *dev; 607 struct sk_buff *skb; 608 int err = -ENOBUFS; 609 struct net *net; 610 u16 port_no = 0; 611 612 if (WARN_ON(!port && !br)) 613 return; 614 615 if (port) { 616 dev = port->dev; 617 br = port->br; 618 port_no = port->port_no; 619 } else { 620 dev = br->dev; 621 } 622 623 net = dev_net(dev); 624 br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event); 625 626 skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC); 627 if (skb == NULL) 628 goto errout; 629 630 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev, false); 631 if (err < 0) { 632 /* -EMSGSIZE implies BUG in br_nlmsg_size() */ 633 WARN_ON(err == -EMSGSIZE); 634 kfree_skb(skb); 635 goto errout; 636 } 637 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 638 return; 639 errout: 640 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 641 } 642 643 /* Notify listeners of a change in bridge or port information */ 644 void br_ifinfo_notify(int event, const struct net_bridge *br, 645 const struct net_bridge_port *port) 646 { 647 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED; 648 649 return br_info_notify(event, br, port, filter); 650 } 651 652 /* 653 * Dump information about all ports, in response to GETLINK 654 */ 655 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 656 struct net_device *dev, u32 filter_mask, int nlflags) 657 { 658 struct net_bridge_port *port = br_port_get_rtnl(dev); 659 660 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) && 661 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) && 662 !(filter_mask & RTEXT_FILTER_MRP) && 663 !(filter_mask & RTEXT_FILTER_CFM_CONFIG) && 664 !(filter_mask & RTEXT_FILTER_CFM_STATUS)) 665 return 0; 666 667 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags, 668 filter_mask, dev, true); 669 } 670 671 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p, 672 int cmd, struct bridge_vlan_info *vinfo, bool *changed, 673 struct netlink_ext_ack *extack) 674 { 675 bool curr_change; 676 int err = 0; 677 678 switch (cmd) { 679 case RTM_SETLINK: 680 if (p) { 681 /* if the MASTER flag is set this will act on the global 682 * per-VLAN entry as well 683 */ 684 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags, 685 &curr_change, extack); 686 } else { 687 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY; 688 err = br_vlan_add(br, vinfo->vid, vinfo->flags, 689 &curr_change, extack); 690 } 691 if (curr_change) 692 *changed = true; 693 break; 694 695 case RTM_DELLINK: 696 if (p) { 697 if (!nbp_vlan_delete(p, vinfo->vid)) 698 *changed = true; 699 700 if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) && 701 !br_vlan_delete(p->br, vinfo->vid)) 702 *changed = true; 703 } else if (!br_vlan_delete(br, vinfo->vid)) { 704 *changed = true; 705 } 706 break; 707 } 708 709 return err; 710 } 711 712 int br_process_vlan_info(struct net_bridge *br, 713 struct net_bridge_port *p, int cmd, 714 struct bridge_vlan_info *vinfo_curr, 715 struct bridge_vlan_info **vinfo_last, 716 bool *changed, 717 struct netlink_ext_ack *extack) 718 { 719 int err, rtm_cmd; 720 721 if (!br_vlan_valid_id(vinfo_curr->vid, extack)) 722 return -EINVAL; 723 724 /* needed for vlan-only NEWVLAN/DELVLAN notifications */ 725 rtm_cmd = br_afspec_cmd_to_rtm(cmd); 726 727 if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 728 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack)) 729 return -EINVAL; 730 *vinfo_last = vinfo_curr; 731 return 0; 732 } 733 734 if (*vinfo_last) { 735 struct bridge_vlan_info tmp_vinfo; 736 int v, v_change_start = 0; 737 738 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack)) 739 return -EINVAL; 740 741 memcpy(&tmp_vinfo, *vinfo_last, 742 sizeof(struct bridge_vlan_info)); 743 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) { 744 bool curr_change = false; 745 746 tmp_vinfo.vid = v; 747 err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change, 748 extack); 749 if (err) 750 break; 751 if (curr_change) { 752 *changed = curr_change; 753 if (!v_change_start) 754 v_change_start = v; 755 } else { 756 /* nothing to notify yet */ 757 if (!v_change_start) 758 continue; 759 br_vlan_notify(br, p, v_change_start, 760 v - 1, rtm_cmd); 761 v_change_start = 0; 762 } 763 cond_resched(); 764 } 765 /* v_change_start is set only if the last/whole range changed */ 766 if (v_change_start) 767 br_vlan_notify(br, p, v_change_start, 768 v - 1, rtm_cmd); 769 770 *vinfo_last = NULL; 771 772 return err; 773 } 774 775 err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack); 776 if (*changed) 777 br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd); 778 779 return err; 780 } 781 782 static int br_afspec(struct net_bridge *br, 783 struct net_bridge_port *p, 784 struct nlattr *af_spec, 785 int cmd, bool *changed, 786 struct netlink_ext_ack *extack) 787 { 788 struct bridge_vlan_info *vinfo_curr = NULL; 789 struct bridge_vlan_info *vinfo_last = NULL; 790 struct nlattr *attr; 791 struct vtunnel_info tinfo_last = {}; 792 struct vtunnel_info tinfo_curr = {}; 793 int err = 0, rem; 794 795 nla_for_each_nested(attr, af_spec, rem) { 796 err = 0; 797 switch (nla_type(attr)) { 798 case IFLA_BRIDGE_VLAN_TUNNEL_INFO: 799 if (!p || !(p->flags & BR_VLAN_TUNNEL)) 800 return -EINVAL; 801 err = br_parse_vlan_tunnel_info(attr, &tinfo_curr); 802 if (err) 803 return err; 804 err = br_process_vlan_tunnel_info(br, p, cmd, 805 &tinfo_curr, 806 &tinfo_last, 807 changed); 808 if (err) 809 return err; 810 break; 811 case IFLA_BRIDGE_VLAN_INFO: 812 if (nla_len(attr) != sizeof(struct bridge_vlan_info)) 813 return -EINVAL; 814 vinfo_curr = nla_data(attr); 815 err = br_process_vlan_info(br, p, cmd, vinfo_curr, 816 &vinfo_last, changed, 817 extack); 818 if (err) 819 return err; 820 break; 821 case IFLA_BRIDGE_MRP: 822 err = br_mrp_parse(br, p, attr, cmd, extack); 823 if (err) 824 return err; 825 break; 826 case IFLA_BRIDGE_CFM: 827 err = br_cfm_parse(br, p, attr, cmd, extack); 828 if (err) 829 return err; 830 break; 831 case IFLA_BRIDGE_MST: 832 if (!p) { 833 NL_SET_ERR_MSG(extack, 834 "MST states can only be set on bridge ports"); 835 return -EINVAL; 836 } 837 838 if (cmd != RTM_SETLINK) { 839 NL_SET_ERR_MSG(extack, 840 "MST states can only be set through RTM_SETLINK"); 841 return -EINVAL; 842 } 843 844 err = br_mst_process(p, attr, extack); 845 if (err) 846 return err; 847 break; 848 } 849 } 850 851 return err; 852 } 853 854 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = { 855 [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, 856 [IFLA_BRPORT_COST] = { .type = NLA_U32 }, 857 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, 858 [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, 859 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, 860 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, 861 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 }, 862 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, 863 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, 864 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 }, 865 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 }, 866 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 }, 867 [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 }, 868 [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 }, 869 [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 }, 870 [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 }, 871 [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 }, 872 [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 }, 873 [IFLA_BRPORT_ISOLATED] = { .type = NLA_U8 }, 874 [IFLA_BRPORT_LOCKED] = { .type = NLA_U8 }, 875 [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 }, 876 [IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT] = { .type = NLA_U32 }, 877 }; 878 879 /* Change the state of the port and notify spanning tree */ 880 static int br_set_port_state(struct net_bridge_port *p, u8 state) 881 { 882 if (state > BR_STATE_BLOCKING) 883 return -EINVAL; 884 885 /* if kernel STP is running, don't allow changes */ 886 if (p->br->stp_enabled == BR_KERNEL_STP) 887 return -EBUSY; 888 889 /* if device is not up, change is not allowed 890 * if link is not present, only allowable state is disabled 891 */ 892 if (!netif_running(p->dev) || 893 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED)) 894 return -ENETDOWN; 895 896 br_set_state(p, state); 897 br_port_state_selection(p->br); 898 return 0; 899 } 900 901 /* Set/clear or port flags based on attribute */ 902 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[], 903 int attrtype, unsigned long mask) 904 { 905 if (!tb[attrtype]) 906 return; 907 908 if (nla_get_u8(tb[attrtype])) 909 p->flags |= mask; 910 else 911 p->flags &= ~mask; 912 } 913 914 /* Process bridge protocol info on port */ 915 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[], 916 struct netlink_ext_ack *extack) 917 { 918 unsigned long old_flags, changed_mask; 919 bool br_vlan_tunnel_old; 920 int err; 921 922 old_flags = p->flags; 923 br_vlan_tunnel_old = (old_flags & BR_VLAN_TUNNEL) ? true : false; 924 925 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE); 926 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD); 927 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, 928 BR_MULTICAST_FAST_LEAVE); 929 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK); 930 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING); 931 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD); 932 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD); 933 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, 934 BR_MULTICAST_TO_UNICAST); 935 br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD); 936 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP); 937 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI); 938 br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL); 939 br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS, BR_NEIGH_SUPPRESS); 940 br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED); 941 br_set_port_flag(p, tb, IFLA_BRPORT_LOCKED, BR_PORT_LOCKED); 942 943 changed_mask = old_flags ^ p->flags; 944 945 err = br_switchdev_set_port_flag(p, p->flags, changed_mask, extack); 946 if (err) { 947 p->flags = old_flags; 948 return err; 949 } 950 951 if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL)) 952 nbp_vlan_tunnel_info_flush(p); 953 954 br_port_flags_change(p, changed_mask); 955 956 if (tb[IFLA_BRPORT_COST]) { 957 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST])); 958 if (err) 959 return err; 960 } 961 962 if (tb[IFLA_BRPORT_PRIORITY]) { 963 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY])); 964 if (err) 965 return err; 966 } 967 968 if (tb[IFLA_BRPORT_STATE]) { 969 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE])); 970 if (err) 971 return err; 972 } 973 974 if (tb[IFLA_BRPORT_FLUSH]) 975 br_fdb_delete_by_port(p->br, p, 0, 0); 976 977 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 978 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) { 979 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]); 980 981 err = br_multicast_set_port_router(&p->multicast_ctx, 982 mcast_router); 983 if (err) 984 return err; 985 } 986 987 if (tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]) { 988 u32 hlimit; 989 990 hlimit = nla_get_u32(tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]); 991 err = br_multicast_eht_set_hosts_limit(p, hlimit); 992 if (err) 993 return err; 994 } 995 #endif 996 997 if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) { 998 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]); 999 1000 if (fwd_mask & BR_GROUPFWD_MACPAUSE) 1001 return -EINVAL; 1002 p->group_fwd_mask = fwd_mask; 1003 } 1004 1005 if (tb[IFLA_BRPORT_BACKUP_PORT]) { 1006 struct net_device *backup_dev = NULL; 1007 u32 backup_ifindex; 1008 1009 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]); 1010 if (backup_ifindex) { 1011 backup_dev = __dev_get_by_index(dev_net(p->dev), 1012 backup_ifindex); 1013 if (!backup_dev) 1014 return -ENOENT; 1015 } 1016 1017 err = nbp_backup_change(p, backup_dev); 1018 if (err) 1019 return err; 1020 } 1021 1022 return 0; 1023 } 1024 1025 /* Change state and parameters on port. */ 1026 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags, 1027 struct netlink_ext_ack *extack) 1028 { 1029 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev); 1030 struct nlattr *tb[IFLA_BRPORT_MAX + 1]; 1031 struct net_bridge_port *p; 1032 struct nlattr *protinfo; 1033 struct nlattr *afspec; 1034 bool changed = false; 1035 int err = 0; 1036 1037 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO); 1038 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 1039 if (!protinfo && !afspec) 1040 return 0; 1041 1042 p = br_port_get_rtnl(dev); 1043 /* We want to accept dev as bridge itself if the AF_SPEC 1044 * is set to see if someone is setting vlan info on the bridge 1045 */ 1046 if (!p && !afspec) 1047 return -EINVAL; 1048 1049 if (p && protinfo) { 1050 if (protinfo->nla_type & NLA_F_NESTED) { 1051 err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX, 1052 protinfo, 1053 br_port_policy, 1054 NULL); 1055 if (err) 1056 return err; 1057 1058 spin_lock_bh(&p->br->lock); 1059 err = br_setport(p, tb, extack); 1060 spin_unlock_bh(&p->br->lock); 1061 } else { 1062 /* Binary compatibility with old RSTP */ 1063 if (nla_len(protinfo) < sizeof(u8)) 1064 return -EINVAL; 1065 1066 spin_lock_bh(&p->br->lock); 1067 err = br_set_port_state(p, nla_get_u8(protinfo)); 1068 spin_unlock_bh(&p->br->lock); 1069 } 1070 if (err) 1071 goto out; 1072 changed = true; 1073 } 1074 1075 if (afspec) 1076 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack); 1077 1078 if (changed) 1079 br_ifinfo_notify(RTM_NEWLINK, br, p); 1080 out: 1081 return err; 1082 } 1083 1084 /* Delete port information */ 1085 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 1086 { 1087 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev); 1088 struct net_bridge_port *p; 1089 struct nlattr *afspec; 1090 bool changed = false; 1091 int err = 0; 1092 1093 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 1094 if (!afspec) 1095 return 0; 1096 1097 p = br_port_get_rtnl(dev); 1098 /* We want to accept dev as bridge itself as well */ 1099 if (!p && !netif_is_bridge_master(dev)) 1100 return -EINVAL; 1101 1102 err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL); 1103 if (changed) 1104 /* Send RTM_NEWLINK because userspace 1105 * expects RTM_NEWLINK for vlan dels 1106 */ 1107 br_ifinfo_notify(RTM_NEWLINK, br, p); 1108 1109 return err; 1110 } 1111 1112 static int br_validate(struct nlattr *tb[], struct nlattr *data[], 1113 struct netlink_ext_ack *extack) 1114 { 1115 if (tb[IFLA_ADDRESS]) { 1116 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 1117 return -EINVAL; 1118 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 1119 return -EADDRNOTAVAIL; 1120 } 1121 1122 if (!data) 1123 return 0; 1124 1125 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1126 if (data[IFLA_BR_VLAN_PROTOCOL] && 1127 !eth_type_vlan(nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]))) 1128 return -EPROTONOSUPPORT; 1129 1130 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { 1131 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); 1132 1133 if (defpvid >= VLAN_VID_MASK) 1134 return -EINVAL; 1135 } 1136 #endif 1137 1138 return 0; 1139 } 1140 1141 static int br_port_slave_changelink(struct net_device *brdev, 1142 struct net_device *dev, 1143 struct nlattr *tb[], 1144 struct nlattr *data[], 1145 struct netlink_ext_ack *extack) 1146 { 1147 struct net_bridge *br = netdev_priv(brdev); 1148 int ret; 1149 1150 if (!data) 1151 return 0; 1152 1153 spin_lock_bh(&br->lock); 1154 ret = br_setport(br_port_get_rtnl(dev), data, extack); 1155 spin_unlock_bh(&br->lock); 1156 1157 return ret; 1158 } 1159 1160 static int br_port_fill_slave_info(struct sk_buff *skb, 1161 const struct net_device *brdev, 1162 const struct net_device *dev) 1163 { 1164 return br_port_fill_attrs(skb, br_port_get_rtnl(dev)); 1165 } 1166 1167 static size_t br_port_get_slave_size(const struct net_device *brdev, 1168 const struct net_device *dev) 1169 { 1170 return br_port_info_size(); 1171 } 1172 1173 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = { 1174 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 }, 1175 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 }, 1176 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 }, 1177 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 }, 1178 [IFLA_BR_STP_STATE] = { .type = NLA_U32 }, 1179 [IFLA_BR_PRIORITY] = { .type = NLA_U16 }, 1180 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 }, 1181 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 }, 1182 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 }, 1183 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY, 1184 .len = ETH_ALEN }, 1185 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 }, 1186 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 }, 1187 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 }, 1188 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 }, 1189 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 }, 1190 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 }, 1191 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 }, 1192 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 }, 1193 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 }, 1194 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 }, 1195 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 }, 1196 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 }, 1197 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 }, 1198 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 }, 1199 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 }, 1200 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 }, 1201 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 }, 1202 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 }, 1203 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 }, 1204 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 }, 1205 [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 }, 1206 [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 }, 1207 [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 }, 1208 [IFLA_BR_MULTI_BOOLOPT] = 1209 NLA_POLICY_EXACT_LEN(sizeof(struct br_boolopt_multi)), 1210 }; 1211 1212 static int br_changelink(struct net_device *brdev, struct nlattr *tb[], 1213 struct nlattr *data[], 1214 struct netlink_ext_ack *extack) 1215 { 1216 struct net_bridge *br = netdev_priv(brdev); 1217 int err; 1218 1219 if (!data) 1220 return 0; 1221 1222 if (data[IFLA_BR_FORWARD_DELAY]) { 1223 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY])); 1224 if (err) 1225 return err; 1226 } 1227 1228 if (data[IFLA_BR_HELLO_TIME]) { 1229 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME])); 1230 if (err) 1231 return err; 1232 } 1233 1234 if (data[IFLA_BR_MAX_AGE]) { 1235 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE])); 1236 if (err) 1237 return err; 1238 } 1239 1240 if (data[IFLA_BR_AGEING_TIME]) { 1241 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME])); 1242 if (err) 1243 return err; 1244 } 1245 1246 if (data[IFLA_BR_STP_STATE]) { 1247 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]); 1248 1249 err = br_stp_set_enabled(br, stp_enabled, extack); 1250 if (err) 1251 return err; 1252 } 1253 1254 if (data[IFLA_BR_PRIORITY]) { 1255 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]); 1256 1257 br_stp_set_bridge_priority(br, priority); 1258 } 1259 1260 if (data[IFLA_BR_VLAN_FILTERING]) { 1261 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]); 1262 1263 err = br_vlan_filter_toggle(br, vlan_filter, extack); 1264 if (err) 1265 return err; 1266 } 1267 1268 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1269 if (data[IFLA_BR_VLAN_PROTOCOL]) { 1270 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]); 1271 1272 err = __br_vlan_set_proto(br, vlan_proto, extack); 1273 if (err) 1274 return err; 1275 } 1276 1277 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { 1278 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); 1279 1280 err = __br_vlan_set_default_pvid(br, defpvid, extack); 1281 if (err) 1282 return err; 1283 } 1284 1285 if (data[IFLA_BR_VLAN_STATS_ENABLED]) { 1286 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]); 1287 1288 err = br_vlan_set_stats(br, vlan_stats); 1289 if (err) 1290 return err; 1291 } 1292 1293 if (data[IFLA_BR_VLAN_STATS_PER_PORT]) { 1294 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]); 1295 1296 err = br_vlan_set_stats_per_port(br, per_port); 1297 if (err) 1298 return err; 1299 } 1300 #endif 1301 1302 if (data[IFLA_BR_GROUP_FWD_MASK]) { 1303 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]); 1304 1305 if (fwd_mask & BR_GROUPFWD_RESTRICTED) 1306 return -EINVAL; 1307 br->group_fwd_mask = fwd_mask; 1308 } 1309 1310 if (data[IFLA_BR_GROUP_ADDR]) { 1311 u8 new_addr[ETH_ALEN]; 1312 1313 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN) 1314 return -EINVAL; 1315 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN); 1316 if (!is_link_local_ether_addr(new_addr)) 1317 return -EINVAL; 1318 if (new_addr[5] == 1 || /* 802.3x Pause address */ 1319 new_addr[5] == 2 || /* 802.3ad Slow protocols */ 1320 new_addr[5] == 3) /* 802.1X PAE address */ 1321 return -EINVAL; 1322 spin_lock_bh(&br->lock); 1323 memcpy(br->group_addr, new_addr, sizeof(br->group_addr)); 1324 spin_unlock_bh(&br->lock); 1325 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true); 1326 br_recalculate_fwd_mask(br); 1327 } 1328 1329 if (data[IFLA_BR_FDB_FLUSH]) { 1330 struct net_bridge_fdb_flush_desc desc = { 1331 .flags_mask = BR_FDB_STATIC 1332 }; 1333 1334 br_fdb_flush(br, &desc); 1335 } 1336 1337 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1338 if (data[IFLA_BR_MCAST_ROUTER]) { 1339 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]); 1340 1341 err = br_multicast_set_router(&br->multicast_ctx, 1342 multicast_router); 1343 if (err) 1344 return err; 1345 } 1346 1347 if (data[IFLA_BR_MCAST_SNOOPING]) { 1348 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]); 1349 1350 err = br_multicast_toggle(br, mcast_snooping, extack); 1351 if (err) 1352 return err; 1353 } 1354 1355 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) { 1356 u8 val; 1357 1358 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]); 1359 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val); 1360 } 1361 1362 if (data[IFLA_BR_MCAST_QUERIER]) { 1363 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]); 1364 1365 err = br_multicast_set_querier(&br->multicast_ctx, 1366 mcast_querier); 1367 if (err) 1368 return err; 1369 } 1370 1371 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) 1372 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n", 1373 RHT_ELASTICITY); 1374 1375 if (data[IFLA_BR_MCAST_HASH_MAX]) 1376 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]); 1377 1378 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) { 1379 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]); 1380 1381 br->multicast_ctx.multicast_last_member_count = val; 1382 } 1383 1384 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) { 1385 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]); 1386 1387 br->multicast_ctx.multicast_startup_query_count = val; 1388 } 1389 1390 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) { 1391 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]); 1392 1393 br->multicast_ctx.multicast_last_member_interval = clock_t_to_jiffies(val); 1394 } 1395 1396 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) { 1397 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]); 1398 1399 br->multicast_ctx.multicast_membership_interval = clock_t_to_jiffies(val); 1400 } 1401 1402 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) { 1403 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]); 1404 1405 br->multicast_ctx.multicast_querier_interval = clock_t_to_jiffies(val); 1406 } 1407 1408 if (data[IFLA_BR_MCAST_QUERY_INTVL]) { 1409 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]); 1410 1411 br_multicast_set_query_intvl(&br->multicast_ctx, val); 1412 } 1413 1414 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) { 1415 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]); 1416 1417 br->multicast_ctx.multicast_query_response_interval = clock_t_to_jiffies(val); 1418 } 1419 1420 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) { 1421 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]); 1422 1423 br_multicast_set_startup_query_intvl(&br->multicast_ctx, val); 1424 } 1425 1426 if (data[IFLA_BR_MCAST_STATS_ENABLED]) { 1427 __u8 mcast_stats; 1428 1429 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]); 1430 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats); 1431 } 1432 1433 if (data[IFLA_BR_MCAST_IGMP_VERSION]) { 1434 __u8 igmp_version; 1435 1436 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]); 1437 err = br_multicast_set_igmp_version(&br->multicast_ctx, 1438 igmp_version); 1439 if (err) 1440 return err; 1441 } 1442 1443 #if IS_ENABLED(CONFIG_IPV6) 1444 if (data[IFLA_BR_MCAST_MLD_VERSION]) { 1445 __u8 mld_version; 1446 1447 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]); 1448 err = br_multicast_set_mld_version(&br->multicast_ctx, 1449 mld_version); 1450 if (err) 1451 return err; 1452 } 1453 #endif 1454 #endif 1455 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1456 if (data[IFLA_BR_NF_CALL_IPTABLES]) { 1457 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]); 1458 1459 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val); 1460 } 1461 1462 if (data[IFLA_BR_NF_CALL_IP6TABLES]) { 1463 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]); 1464 1465 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val); 1466 } 1467 1468 if (data[IFLA_BR_NF_CALL_ARPTABLES]) { 1469 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]); 1470 1471 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val); 1472 } 1473 #endif 1474 1475 if (data[IFLA_BR_MULTI_BOOLOPT]) { 1476 struct br_boolopt_multi *bm; 1477 1478 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]); 1479 err = br_boolopt_multi_toggle(br, bm, extack); 1480 if (err) 1481 return err; 1482 } 1483 1484 return 0; 1485 } 1486 1487 static int br_dev_newlink(struct net *src_net, struct net_device *dev, 1488 struct nlattr *tb[], struct nlattr *data[], 1489 struct netlink_ext_ack *extack) 1490 { 1491 struct net_bridge *br = netdev_priv(dev); 1492 int err; 1493 1494 err = register_netdevice(dev); 1495 if (err) 1496 return err; 1497 1498 if (tb[IFLA_ADDRESS]) { 1499 spin_lock_bh(&br->lock); 1500 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS])); 1501 spin_unlock_bh(&br->lock); 1502 } 1503 1504 err = br_changelink(dev, tb, data, extack); 1505 if (err) 1506 br_dev_delete(dev, NULL); 1507 1508 return err; 1509 } 1510 1511 static size_t br_get_size(const struct net_device *brdev) 1512 { 1513 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */ 1514 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */ 1515 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */ 1516 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */ 1517 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */ 1518 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */ 1519 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */ 1520 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1521 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */ 1522 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */ 1523 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */ 1524 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_PER_PORT */ 1525 #endif 1526 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */ 1527 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */ 1528 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */ 1529 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */ 1530 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */ 1531 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */ 1532 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */ 1533 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */ 1534 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */ 1535 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */ 1536 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */ 1537 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */ 1538 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1539 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */ 1540 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */ 1541 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */ 1542 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */ 1543 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */ 1544 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */ 1545 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */ 1546 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */ 1547 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */ 1548 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */ 1549 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */ 1550 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */ 1551 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */ 1552 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */ 1553 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */ 1554 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */ 1555 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */ 1556 br_multicast_querier_state_size() + /* IFLA_BR_MCAST_QUERIER_STATE */ 1557 #endif 1558 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1559 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */ 1560 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */ 1561 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */ 1562 #endif 1563 nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */ 1564 0; 1565 } 1566 1567 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev) 1568 { 1569 struct net_bridge *br = netdev_priv(brdev); 1570 u32 forward_delay = jiffies_to_clock_t(br->forward_delay); 1571 u32 hello_time = jiffies_to_clock_t(br->hello_time); 1572 u32 age_time = jiffies_to_clock_t(br->max_age); 1573 u32 ageing_time = jiffies_to_clock_t(br->ageing_time); 1574 u32 stp_enabled = br->stp_enabled; 1575 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]; 1576 u8 vlan_enabled = br_vlan_enabled(br->dev); 1577 struct br_boolopt_multi bm; 1578 u64 clockval; 1579 1580 clockval = br_timer_value(&br->hello_timer); 1581 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD)) 1582 return -EMSGSIZE; 1583 clockval = br_timer_value(&br->tcn_timer); 1584 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD)) 1585 return -EMSGSIZE; 1586 clockval = br_timer_value(&br->topology_change_timer); 1587 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval, 1588 IFLA_BR_PAD)) 1589 return -EMSGSIZE; 1590 clockval = br_timer_value(&br->gc_work.timer); 1591 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD)) 1592 return -EMSGSIZE; 1593 1594 br_boolopt_multi_get(br, &bm); 1595 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) || 1596 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) || 1597 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) || 1598 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) || 1599 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) || 1600 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) || 1601 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) || 1602 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) || 1603 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id), 1604 &br->bridge_id) || 1605 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id), 1606 &br->designated_root) || 1607 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) || 1608 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) || 1609 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) || 1610 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED, 1611 br->topology_change_detected) || 1612 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) || 1613 nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm)) 1614 return -EMSGSIZE; 1615 1616 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1617 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) || 1618 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) || 1619 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, 1620 br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) || 1621 nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT, 1622 br_opt_get(br, BROPT_VLAN_STATS_PER_PORT))) 1623 return -EMSGSIZE; 1624 #endif 1625 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1626 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, 1627 br->multicast_ctx.multicast_router) || 1628 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, 1629 br_opt_get(br, BROPT_MULTICAST_ENABLED)) || 1630 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR, 1631 br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) || 1632 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, 1633 br->multicast_ctx.multicast_querier) || 1634 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED, 1635 br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) || 1636 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) || 1637 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) || 1638 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT, 1639 br->multicast_ctx.multicast_last_member_count) || 1640 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT, 1641 br->multicast_ctx.multicast_startup_query_count) || 1642 nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION, 1643 br->multicast_ctx.multicast_igmp_version) || 1644 br_multicast_dump_querier_state(skb, &br->multicast_ctx, 1645 IFLA_BR_MCAST_QUERIER_STATE)) 1646 return -EMSGSIZE; 1647 #if IS_ENABLED(CONFIG_IPV6) 1648 if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION, 1649 br->multicast_ctx.multicast_mld_version)) 1650 return -EMSGSIZE; 1651 #endif 1652 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_last_member_interval); 1653 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval, 1654 IFLA_BR_PAD)) 1655 return -EMSGSIZE; 1656 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_membership_interval); 1657 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval, 1658 IFLA_BR_PAD)) 1659 return -EMSGSIZE; 1660 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_querier_interval); 1661 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval, 1662 IFLA_BR_PAD)) 1663 return -EMSGSIZE; 1664 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_interval); 1665 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval, 1666 IFLA_BR_PAD)) 1667 return -EMSGSIZE; 1668 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_response_interval); 1669 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval, 1670 IFLA_BR_PAD)) 1671 return -EMSGSIZE; 1672 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_startup_query_interval); 1673 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval, 1674 IFLA_BR_PAD)) 1675 return -EMSGSIZE; 1676 #endif 1677 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1678 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES, 1679 br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) || 1680 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES, 1681 br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) || 1682 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES, 1683 br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0)) 1684 return -EMSGSIZE; 1685 #endif 1686 1687 return 0; 1688 } 1689 1690 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr) 1691 { 1692 struct net_bridge_port *p = NULL; 1693 struct net_bridge_vlan_group *vg; 1694 struct net_bridge_vlan *v; 1695 struct net_bridge *br; 1696 int numvls = 0; 1697 1698 switch (attr) { 1699 case IFLA_STATS_LINK_XSTATS: 1700 br = netdev_priv(dev); 1701 vg = br_vlan_group(br); 1702 break; 1703 case IFLA_STATS_LINK_XSTATS_SLAVE: 1704 p = br_port_get_rtnl(dev); 1705 if (!p) 1706 return 0; 1707 vg = nbp_vlan_group(p); 1708 break; 1709 default: 1710 return 0; 1711 } 1712 1713 if (vg) { 1714 /* we need to count all, even placeholder entries */ 1715 list_for_each_entry(v, &vg->vlan_list, vlist) 1716 numvls++; 1717 } 1718 1719 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) + 1720 nla_total_size_64bit(sizeof(struct br_mcast_stats)) + 1721 (p ? nla_total_size_64bit(sizeof(p->stp_xstats)) : 0) + 1722 nla_total_size(0); 1723 } 1724 1725 static int br_fill_linkxstats(struct sk_buff *skb, 1726 const struct net_device *dev, 1727 int *prividx, int attr) 1728 { 1729 struct nlattr *nla __maybe_unused; 1730 struct net_bridge_port *p = NULL; 1731 struct net_bridge_vlan_group *vg; 1732 struct net_bridge_vlan *v; 1733 struct net_bridge *br; 1734 struct nlattr *nest; 1735 int vl_idx = 0; 1736 1737 switch (attr) { 1738 case IFLA_STATS_LINK_XSTATS: 1739 br = netdev_priv(dev); 1740 vg = br_vlan_group(br); 1741 break; 1742 case IFLA_STATS_LINK_XSTATS_SLAVE: 1743 p = br_port_get_rtnl(dev); 1744 if (!p) 1745 return 0; 1746 br = p->br; 1747 vg = nbp_vlan_group(p); 1748 break; 1749 default: 1750 return -EINVAL; 1751 } 1752 1753 nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE); 1754 if (!nest) 1755 return -EMSGSIZE; 1756 1757 if (vg) { 1758 u16 pvid; 1759 1760 pvid = br_get_pvid(vg); 1761 list_for_each_entry(v, &vg->vlan_list, vlist) { 1762 struct bridge_vlan_xstats vxi; 1763 struct pcpu_sw_netstats stats; 1764 1765 if (++vl_idx < *prividx) 1766 continue; 1767 memset(&vxi, 0, sizeof(vxi)); 1768 vxi.vid = v->vid; 1769 vxi.flags = v->flags; 1770 if (v->vid == pvid) 1771 vxi.flags |= BRIDGE_VLAN_INFO_PVID; 1772 br_vlan_get_stats(v, &stats); 1773 vxi.rx_bytes = stats.rx_bytes; 1774 vxi.rx_packets = stats.rx_packets; 1775 vxi.tx_bytes = stats.tx_bytes; 1776 vxi.tx_packets = stats.tx_packets; 1777 1778 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi)) 1779 goto nla_put_failure; 1780 } 1781 } 1782 1783 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1784 if (++vl_idx >= *prividx) { 1785 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST, 1786 sizeof(struct br_mcast_stats), 1787 BRIDGE_XSTATS_PAD); 1788 if (!nla) 1789 goto nla_put_failure; 1790 br_multicast_get_stats(br, p, nla_data(nla)); 1791 } 1792 #endif 1793 1794 if (p) { 1795 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP, 1796 sizeof(p->stp_xstats), 1797 BRIDGE_XSTATS_PAD); 1798 if (!nla) 1799 goto nla_put_failure; 1800 1801 spin_lock_bh(&br->lock); 1802 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats)); 1803 spin_unlock_bh(&br->lock); 1804 } 1805 1806 nla_nest_end(skb, nest); 1807 *prividx = 0; 1808 1809 return 0; 1810 1811 nla_put_failure: 1812 nla_nest_end(skb, nest); 1813 *prividx = vl_idx; 1814 1815 return -EMSGSIZE; 1816 } 1817 1818 static struct rtnl_af_ops br_af_ops __read_mostly = { 1819 .family = AF_BRIDGE, 1820 .get_link_af_size = br_get_link_af_size_filtered, 1821 }; 1822 1823 struct rtnl_link_ops br_link_ops __read_mostly = { 1824 .kind = "bridge", 1825 .priv_size = sizeof(struct net_bridge), 1826 .setup = br_dev_setup, 1827 .maxtype = IFLA_BR_MAX, 1828 .policy = br_policy, 1829 .validate = br_validate, 1830 .newlink = br_dev_newlink, 1831 .changelink = br_changelink, 1832 .dellink = br_dev_delete, 1833 .get_size = br_get_size, 1834 .fill_info = br_fill_info, 1835 .fill_linkxstats = br_fill_linkxstats, 1836 .get_linkxstats_size = br_get_linkxstats_size, 1837 1838 .slave_maxtype = IFLA_BRPORT_MAX, 1839 .slave_policy = br_port_policy, 1840 .slave_changelink = br_port_slave_changelink, 1841 .get_slave_size = br_port_get_slave_size, 1842 .fill_slave_info = br_port_fill_slave_info, 1843 }; 1844 1845 int __init br_netlink_init(void) 1846 { 1847 int err; 1848 1849 br_mdb_init(); 1850 br_vlan_rtnl_init(); 1851 rtnl_af_register(&br_af_ops); 1852 1853 err = rtnl_link_register(&br_link_ops); 1854 if (err) 1855 goto out_af; 1856 1857 return 0; 1858 1859 out_af: 1860 rtnl_af_unregister(&br_af_ops); 1861 br_mdb_uninit(); 1862 return err; 1863 } 1864 1865 void br_netlink_fini(void) 1866 { 1867 br_mdb_uninit(); 1868 br_vlan_rtnl_uninit(); 1869 rtnl_af_unregister(&br_af_ops); 1870 rtnl_link_unregister(&br_link_ops); 1871 } 1872