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 23static 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 } 59initvars: 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 75static 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 93static 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 171static inline size_t br_port_info_size(void) 172{ 173 return nla_total_size(1) /* IFLA_BRPORT_STATE */ 174 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */ 175 + nla_total_size(4) /* IFLA_BRPORT_COST */ 176 + nla_total_size(1) /* IFLA_BRPORT_MODE */ 177 + nla_total_size(1) /* IFLA_BRPORT_GUARD */ 178 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */ 179 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */ 180 + nla_total_size(1) /* IFLA_BRPORT_MCAST_TO_UCAST */ 181 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */ 182 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */ 183 + nla_total_size(1) /* IFLA_BRPORT_MCAST_FLOOD */ 184 + nla_total_size(1) /* IFLA_BRPORT_BCAST_FLOOD */ 185 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */ 186 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */ 187 + nla_total_size(1) /* IFLA_BRPORT_VLAN_TUNNEL */ 188 + nla_total_size(1) /* IFLA_BRPORT_NEIGH_SUPPRESS */ 189 + nla_total_size(1) /* IFLA_BRPORT_ISOLATED */ 190 + nla_total_size(1) /* IFLA_BRPORT_LOCKED */ 191 + nla_total_size(1) /* IFLA_BRPORT_MAB */ 192 + nla_total_size(1) /* IFLA_BRPORT_NEIGH_VLAN_SUPPRESS */ 193 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */ 194 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */ 195 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */ 196 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */ 197 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */ 198 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */ 199 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */ 200 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */ 201 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */ 202 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */ 203 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */ 204#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 205 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */ 206 + nla_total_size(sizeof(u32)) /* IFLA_BRPORT_MCAST_N_GROUPS */ 207 + nla_total_size(sizeof(u32)) /* IFLA_BRPORT_MCAST_MAX_GROUPS */ 208#endif 209 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_GROUP_FWD_MASK */ 210 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MRP_RING_OPEN */ 211 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MRP_IN_OPEN */ 212 + nla_total_size(sizeof(u32)) /* IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT */ 213 + nla_total_size(sizeof(u32)) /* IFLA_BRPORT_MCAST_EHT_HOSTS_CNT */ 214 + nla_total_size(sizeof(u32)) /* IFLA_BRPORT_BACKUP_NHID */ 215 + 0; 216} 217 218static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask) 219{ 220 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 221 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 222 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 223 + nla_total_size(4) /* IFLA_MASTER */ 224 + nla_total_size(4) /* IFLA_MTU */ 225 + nla_total_size(4) /* IFLA_LINK */ 226 + nla_total_size(1) /* IFLA_OPERSTATE */ 227 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */ 228 + nla_total_size(br_get_link_af_size_filtered(dev, 229 filter_mask)) /* IFLA_AF_SPEC */ 230 + nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */ 231} 232 233static int br_port_fill_attrs(struct sk_buff *skb, 234 const struct net_bridge_port *p) 235{ 236 u8 mode = !!(p->flags & BR_HAIRPIN_MODE); 237 struct net_bridge_port *backup_p; 238 u64 timerval; 239 240 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) || 241 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) || 242 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) || 243 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) || 244 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) || 245 nla_put_u8(skb, IFLA_BRPORT_PROTECT, 246 !!(p->flags & BR_ROOT_BLOCK)) || 247 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, 248 !!(p->flags & BR_MULTICAST_FAST_LEAVE)) || 249 nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST, 250 !!(p->flags & BR_MULTICAST_TO_UNICAST)) || 251 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) || 252 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, 253 !!(p->flags & BR_FLOOD)) || 254 nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD, 255 !!(p->flags & BR_MCAST_FLOOD)) || 256 nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD, 257 !!(p->flags & BR_BCAST_FLOOD)) || 258 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) || 259 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI, 260 !!(p->flags & BR_PROXYARP_WIFI)) || 261 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id), 262 &p->designated_root) || 263 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id), 264 &p->designated_bridge) || 265 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) || 266 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) || 267 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) || 268 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) || 269 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK, 270 p->topology_change_ack) || 271 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) || 272 nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags & 273 BR_VLAN_TUNNEL)) || 274 nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) || 275 nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS, 276 !!(p->flags & BR_NEIGH_SUPPRESS)) || 277 nla_put_u8(skb, IFLA_BRPORT_MRP_RING_OPEN, !!(p->flags & 278 BR_MRP_LOST_CONT)) || 279 nla_put_u8(skb, IFLA_BRPORT_MRP_IN_OPEN, 280 !!(p->flags & BR_MRP_LOST_IN_CONT)) || 281 nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)) || 282 nla_put_u8(skb, IFLA_BRPORT_LOCKED, !!(p->flags & BR_PORT_LOCKED)) || 283 nla_put_u8(skb, IFLA_BRPORT_MAB, !!(p->flags & BR_PORT_MAB)) || 284 nla_put_u8(skb, IFLA_BRPORT_NEIGH_VLAN_SUPPRESS, 285 !!(p->flags & BR_NEIGH_VLAN_SUPPRESS))) 286 return -EMSGSIZE; 287 288 timerval = br_timer_value(&p->message_age_timer); 289 if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval, 290 IFLA_BRPORT_PAD)) 291 return -EMSGSIZE; 292 timerval = br_timer_value(&p->forward_delay_timer); 293 if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval, 294 IFLA_BRPORT_PAD)) 295 return -EMSGSIZE; 296 timerval = br_timer_value(&p->hold_timer); 297 if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval, 298 IFLA_BRPORT_PAD)) 299 return -EMSGSIZE; 300 301#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 302 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER, 303 p->multicast_ctx.multicast_router) || 304 nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT, 305 p->multicast_eht_hosts_limit) || 306 nla_put_u32(skb, IFLA_BRPORT_MCAST_EHT_HOSTS_CNT, 307 p->multicast_eht_hosts_cnt) || 308 nla_put_u32(skb, IFLA_BRPORT_MCAST_N_GROUPS, 309 br_multicast_ngroups_get(&p->multicast_ctx)) || 310 nla_put_u32(skb, IFLA_BRPORT_MCAST_MAX_GROUPS, 311 br_multicast_ngroups_get_max(&p->multicast_ctx))) 312 return -EMSGSIZE; 313#endif 314 315 /* we might be called only with br->lock */ 316 rcu_read_lock(); 317 backup_p = rcu_dereference(p->backup_port); 318 if (backup_p) 319 nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT, 320 backup_p->dev->ifindex); 321 rcu_read_unlock(); 322 323 if (p->backup_nhid && 324 nla_put_u32(skb, IFLA_BRPORT_BACKUP_NHID, p->backup_nhid)) 325 return -EMSGSIZE; 326 327 return 0; 328} 329 330static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start, 331 u16 vid_end, u16 flags) 332{ 333 struct bridge_vlan_info vinfo; 334 335 if ((vid_end - vid_start) > 0) { 336 /* add range to skb */ 337 vinfo.vid = vid_start; 338 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN; 339 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 340 sizeof(vinfo), &vinfo)) 341 goto nla_put_failure; 342 343 vinfo.vid = vid_end; 344 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END; 345 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 346 sizeof(vinfo), &vinfo)) 347 goto nla_put_failure; 348 } else { 349 vinfo.vid = vid_start; 350 vinfo.flags = flags; 351 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 352 sizeof(vinfo), &vinfo)) 353 goto nla_put_failure; 354 } 355 356 return 0; 357 358nla_put_failure: 359 return -EMSGSIZE; 360} 361 362static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb, 363 struct net_bridge_vlan_group *vg) 364{ 365 struct net_bridge_vlan *v; 366 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0; 367 u16 flags, pvid; 368 int err = 0; 369 370 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan 371 * and mark vlan info with begin and end flags 372 * if vlaninfo represents a range 373 */ 374 pvid = br_get_pvid(vg); 375 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 376 flags = 0; 377 if (!br_vlan_should_use(v)) 378 continue; 379 if (v->vid == pvid) 380 flags |= BRIDGE_VLAN_INFO_PVID; 381 382 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 383 flags |= BRIDGE_VLAN_INFO_UNTAGGED; 384 385 if (vid_range_start == 0) { 386 goto initvars; 387 } else if ((v->vid - vid_range_end) == 1 && 388 flags == vid_range_flags) { 389 vid_range_end = v->vid; 390 continue; 391 } else { 392 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 393 vid_range_end, 394 vid_range_flags); 395 if (err) 396 return err; 397 } 398 399initvars: 400 vid_range_start = v->vid; 401 vid_range_end = v->vid; 402 vid_range_flags = flags; 403 } 404 405 if (vid_range_start != 0) { 406 /* Call it once more to send any left over vlans */ 407 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 408 vid_range_end, 409 vid_range_flags); 410 if (err) 411 return err; 412 } 413 414 return 0; 415} 416 417static int br_fill_ifvlaninfo(struct sk_buff *skb, 418 struct net_bridge_vlan_group *vg) 419{ 420 struct bridge_vlan_info vinfo; 421 struct net_bridge_vlan *v; 422 u16 pvid; 423 424 pvid = br_get_pvid(vg); 425 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 426 if (!br_vlan_should_use(v)) 427 continue; 428 429 vinfo.vid = v->vid; 430 vinfo.flags = 0; 431 if (v->vid == pvid) 432 vinfo.flags |= BRIDGE_VLAN_INFO_PVID; 433 434 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 435 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 436 437 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 438 sizeof(vinfo), &vinfo)) 439 goto nla_put_failure; 440 } 441 442 return 0; 443 444nla_put_failure: 445 return -EMSGSIZE; 446} 447 448/* 449 * Create one netlink message for one interface 450 * Contains port and master info as well as carrier and bridge state. 451 */ 452static int br_fill_ifinfo(struct sk_buff *skb, 453 const struct net_bridge_port *port, 454 u32 pid, u32 seq, int event, unsigned int flags, 455 u32 filter_mask, const struct net_device *dev, 456 bool getlink) 457{ 458 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 459 struct nlattr *af = NULL; 460 struct net_bridge *br; 461 struct ifinfomsg *hdr; 462 struct nlmsghdr *nlh; 463 464 if (port) 465 br = port->br; 466 else 467 br = netdev_priv(dev); 468 469 br_debug(br, "br_fill_info event %d port %s master %s\n", 470 event, dev->name, br->dev->name); 471 472 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); 473 if (nlh == NULL) 474 return -EMSGSIZE; 475 476 hdr = nlmsg_data(nlh); 477 hdr->ifi_family = AF_BRIDGE; 478 hdr->__ifi_pad = 0; 479 hdr->ifi_type = dev->type; 480 hdr->ifi_index = dev->ifindex; 481 hdr->ifi_flags = dev_get_flags(dev); 482 hdr->ifi_change = 0; 483 484 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 485 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) || 486 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 487 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 488 (dev->addr_len && 489 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 490 (dev->ifindex != dev_get_iflink(dev) && 491 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 492 goto nla_put_failure; 493 494 if (event == RTM_NEWLINK && port) { 495 struct nlattr *nest; 496 497 nest = nla_nest_start(skb, IFLA_PROTINFO); 498 if (nest == NULL || br_port_fill_attrs(skb, port) < 0) 499 goto nla_put_failure; 500 nla_nest_end(skb, nest); 501 } 502 503 if (filter_mask & (RTEXT_FILTER_BRVLAN | 504 RTEXT_FILTER_BRVLAN_COMPRESSED | 505 RTEXT_FILTER_MRP | 506 RTEXT_FILTER_CFM_CONFIG | 507 RTEXT_FILTER_CFM_STATUS | 508 RTEXT_FILTER_MST)) { 509 af = nla_nest_start_noflag(skb, IFLA_AF_SPEC); 510 if (!af) 511 goto nla_put_failure; 512 } 513 514 /* Check if the VID information is requested */ 515 if ((filter_mask & RTEXT_FILTER_BRVLAN) || 516 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { 517 struct net_bridge_vlan_group *vg; 518 int err; 519 520 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */ 521 rcu_read_lock(); 522 if (port) 523 vg = nbp_vlan_group_rcu(port); 524 else 525 vg = br_vlan_group_rcu(br); 526 527 if (!vg || !vg->num_vlans) { 528 rcu_read_unlock(); 529 goto done; 530 } 531 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) 532 err = br_fill_ifvlaninfo_compressed(skb, vg); 533 else 534 err = br_fill_ifvlaninfo(skb, vg); 535 536 if (port && (port->flags & BR_VLAN_TUNNEL)) 537 err = br_fill_vlan_tunnel_info(skb, vg); 538 rcu_read_unlock(); 539 if (err) 540 goto nla_put_failure; 541 } 542 543 if (filter_mask & RTEXT_FILTER_MRP) { 544 int err; 545 546 if (!br_mrp_enabled(br) || port) 547 goto done; 548 549 rcu_read_lock(); 550 err = br_mrp_fill_info(skb, br); 551 rcu_read_unlock(); 552 553 if (err) 554 goto nla_put_failure; 555 } 556 557 if (filter_mask & (RTEXT_FILTER_CFM_CONFIG | RTEXT_FILTER_CFM_STATUS)) { 558 struct nlattr *cfm_nest = NULL; 559 int err; 560 561 if (!br_cfm_created(br) || port) 562 goto done; 563 564 cfm_nest = nla_nest_start(skb, IFLA_BRIDGE_CFM); 565 if (!cfm_nest) 566 goto nla_put_failure; 567 568 if (filter_mask & RTEXT_FILTER_CFM_CONFIG) { 569 rcu_read_lock(); 570 err = br_cfm_config_fill_info(skb, br); 571 rcu_read_unlock(); 572 if (err) 573 goto nla_put_failure; 574 } 575 576 if (filter_mask & RTEXT_FILTER_CFM_STATUS) { 577 rcu_read_lock(); 578 err = br_cfm_status_fill_info(skb, br, getlink); 579 rcu_read_unlock(); 580 if (err) 581 goto nla_put_failure; 582 } 583 584 nla_nest_end(skb, cfm_nest); 585 } 586 587 if ((filter_mask & RTEXT_FILTER_MST) && 588 br_opt_get(br, BROPT_MST_ENABLED) && port) { 589 const struct net_bridge_vlan_group *vg = nbp_vlan_group(port); 590 struct nlattr *mst_nest; 591 int err; 592 593 if (!vg || !vg->num_vlans) 594 goto done; 595 596 mst_nest = nla_nest_start(skb, IFLA_BRIDGE_MST); 597 if (!mst_nest) 598 goto nla_put_failure; 599 600 err = br_mst_fill_info(skb, vg); 601 if (err) 602 goto nla_put_failure; 603 604 nla_nest_end(skb, mst_nest); 605 } 606 607done: 608 if (af) { 609 if (nlmsg_get_pos(skb) - (void *)af > nla_attr_size(0)) 610 nla_nest_end(skb, af); 611 else 612 nla_nest_cancel(skb, af); 613 } 614 615 nlmsg_end(skb, nlh); 616 return 0; 617 618nla_put_failure: 619 nlmsg_cancel(skb, nlh); 620 return -EMSGSIZE; 621} 622 623void br_info_notify(int event, const struct net_bridge *br, 624 const struct net_bridge_port *port, u32 filter) 625{ 626 struct net_device *dev; 627 struct sk_buff *skb; 628 int err = -ENOBUFS; 629 struct net *net; 630 u16 port_no = 0; 631 632 if (WARN_ON(!port && !br)) 633 return; 634 635 if (port) { 636 dev = port->dev; 637 br = port->br; 638 port_no = port->port_no; 639 } else { 640 dev = br->dev; 641 } 642 643 net = dev_net(dev); 644 br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event); 645 646 skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC); 647 if (skb == NULL) 648 goto errout; 649 650 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev, false); 651 if (err < 0) { 652 /* -EMSGSIZE implies BUG in br_nlmsg_size() */ 653 WARN_ON(err == -EMSGSIZE); 654 kfree_skb(skb); 655 goto errout; 656 } 657 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 658 return; 659errout: 660 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 661} 662 663/* Notify listeners of a change in bridge or port information */ 664void br_ifinfo_notify(int event, const struct net_bridge *br, 665 const struct net_bridge_port *port) 666{ 667 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED; 668 669 return br_info_notify(event, br, port, filter); 670} 671 672/* 673 * Dump information about all ports, in response to GETLINK 674 */ 675int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 676 struct net_device *dev, u32 filter_mask, int nlflags) 677{ 678 struct net_bridge_port *port = br_port_get_rtnl(dev); 679 680 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) && 681 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) && 682 !(filter_mask & RTEXT_FILTER_MRP) && 683 !(filter_mask & RTEXT_FILTER_CFM_CONFIG) && 684 !(filter_mask & RTEXT_FILTER_CFM_STATUS)) 685 return 0; 686 687 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags, 688 filter_mask, dev, true); 689} 690 691static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p, 692 int cmd, struct bridge_vlan_info *vinfo, bool *changed, 693 struct netlink_ext_ack *extack) 694{ 695 bool curr_change; 696 int err = 0; 697 698 switch (cmd) { 699 case RTM_SETLINK: 700 if (p) { 701 /* if the MASTER flag is set this will act on the global 702 * per-VLAN entry as well 703 */ 704 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags, 705 &curr_change, extack); 706 } else { 707 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY; 708 err = br_vlan_add(br, vinfo->vid, vinfo->flags, 709 &curr_change, extack); 710 } 711 if (curr_change) 712 *changed = true; 713 break; 714 715 case RTM_DELLINK: 716 if (p) { 717 if (!nbp_vlan_delete(p, vinfo->vid)) 718 *changed = true; 719 720 if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) && 721 !br_vlan_delete(p->br, vinfo->vid)) 722 *changed = true; 723 } else if (!br_vlan_delete(br, vinfo->vid)) { 724 *changed = true; 725 } 726 break; 727 } 728 729 return err; 730} 731 732int br_process_vlan_info(struct net_bridge *br, 733 struct net_bridge_port *p, int cmd, 734 struct bridge_vlan_info *vinfo_curr, 735 struct bridge_vlan_info **vinfo_last, 736 bool *changed, 737 struct netlink_ext_ack *extack) 738{ 739 int err, rtm_cmd; 740 741 if (!br_vlan_valid_id(vinfo_curr->vid, extack)) 742 return -EINVAL; 743 744 /* needed for vlan-only NEWVLAN/DELVLAN notifications */ 745 rtm_cmd = br_afspec_cmd_to_rtm(cmd); 746 747 if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 748 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack)) 749 return -EINVAL; 750 *vinfo_last = vinfo_curr; 751 return 0; 752 } 753 754 if (*vinfo_last) { 755 struct bridge_vlan_info tmp_vinfo; 756 int v, v_change_start = 0; 757 758 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack)) 759 return -EINVAL; 760 761 memcpy(&tmp_vinfo, *vinfo_last, 762 sizeof(struct bridge_vlan_info)); 763 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) { 764 bool curr_change = false; 765 766 tmp_vinfo.vid = v; 767 err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change, 768 extack); 769 if (err) 770 break; 771 if (curr_change) { 772 *changed = curr_change; 773 if (!v_change_start) 774 v_change_start = v; 775 } else { 776 /* nothing to notify yet */ 777 if (!v_change_start) 778 continue; 779 br_vlan_notify(br, p, v_change_start, 780 v - 1, rtm_cmd); 781 v_change_start = 0; 782 } 783 cond_resched(); 784 } 785 /* v_change_start is set only if the last/whole range changed */ 786 if (v_change_start) 787 br_vlan_notify(br, p, v_change_start, 788 v - 1, rtm_cmd); 789 790 *vinfo_last = NULL; 791 792 return err; 793 } 794 795 err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack); 796 if (*changed) 797 br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd); 798 799 return err; 800} 801 802static int br_afspec(struct net_bridge *br, 803 struct net_bridge_port *p, 804 struct nlattr *af_spec, 805 int cmd, bool *changed, 806 struct netlink_ext_ack *extack) 807{ 808 struct bridge_vlan_info *vinfo_curr = NULL; 809 struct bridge_vlan_info *vinfo_last = NULL; 810 struct nlattr *attr; 811 struct vtunnel_info tinfo_last = {}; 812 struct vtunnel_info tinfo_curr = {}; 813 int err = 0, rem; 814 815 nla_for_each_nested(attr, af_spec, rem) { 816 err = 0; 817 switch (nla_type(attr)) { 818 case IFLA_BRIDGE_VLAN_TUNNEL_INFO: 819 if (!p || !(p->flags & BR_VLAN_TUNNEL)) 820 return -EINVAL; 821 err = br_parse_vlan_tunnel_info(attr, &tinfo_curr); 822 if (err) 823 return err; 824 err = br_process_vlan_tunnel_info(br, p, cmd, 825 &tinfo_curr, 826 &tinfo_last, 827 changed); 828 if (err) 829 return err; 830 break; 831 case IFLA_BRIDGE_VLAN_INFO: 832 if (nla_len(attr) != sizeof(struct bridge_vlan_info)) 833 return -EINVAL; 834 vinfo_curr = nla_data(attr); 835 err = br_process_vlan_info(br, p, cmd, vinfo_curr, 836 &vinfo_last, changed, 837 extack); 838 if (err) 839 return err; 840 break; 841 case IFLA_BRIDGE_MRP: 842 err = br_mrp_parse(br, p, attr, cmd, extack); 843 if (err) 844 return err; 845 break; 846 case IFLA_BRIDGE_CFM: 847 err = br_cfm_parse(br, p, attr, cmd, extack); 848 if (err) 849 return err; 850 break; 851 case IFLA_BRIDGE_MST: 852 if (!p) { 853 NL_SET_ERR_MSG(extack, 854 "MST states can only be set on bridge ports"); 855 return -EINVAL; 856 } 857 858 if (cmd != RTM_SETLINK) { 859 NL_SET_ERR_MSG(extack, 860 "MST states can only be set through RTM_SETLINK"); 861 return -EINVAL; 862 } 863 864 err = br_mst_process(p, attr, extack); 865 if (err) 866 return err; 867 break; 868 } 869 } 870 871 return err; 872} 873 874static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = { 875 [IFLA_BRPORT_UNSPEC] = { .strict_start_type = 876 IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT + 1 }, 877 [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, 878 [IFLA_BRPORT_COST] = { .type = NLA_U32 }, 879 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, 880 [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, 881 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, 882 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, 883 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 }, 884 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, 885 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, 886 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 }, 887 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 }, 888 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 }, 889 [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 }, 890 [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 }, 891 [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 }, 892 [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 }, 893 [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 }, 894 [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 }, 895 [IFLA_BRPORT_ISOLATED] = { .type = NLA_U8 }, 896 [IFLA_BRPORT_LOCKED] = { .type = NLA_U8 }, 897 [IFLA_BRPORT_MAB] = { .type = NLA_U8 }, 898 [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 }, 899 [IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT] = { .type = NLA_U32 }, 900 [IFLA_BRPORT_MCAST_N_GROUPS] = { .type = NLA_REJECT }, 901 [IFLA_BRPORT_MCAST_MAX_GROUPS] = { .type = NLA_U32 }, 902 [IFLA_BRPORT_NEIGH_VLAN_SUPPRESS] = NLA_POLICY_MAX(NLA_U8, 1), 903 [IFLA_BRPORT_BACKUP_NHID] = { .type = NLA_U32 }, 904}; 905 906/* Change the state of the port and notify spanning tree */ 907static int br_set_port_state(struct net_bridge_port *p, u8 state) 908{ 909 if (state > BR_STATE_BLOCKING) 910 return -EINVAL; 911 912 /* if kernel STP is running, don't allow changes */ 913 if (p->br->stp_enabled == BR_KERNEL_STP) 914 return -EBUSY; 915 916 /* if device is not up, change is not allowed 917 * if link is not present, only allowable state is disabled 918 */ 919 if (!netif_running(p->dev) || 920 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED)) 921 return -ENETDOWN; 922 923 br_set_state(p, state); 924 br_port_state_selection(p->br); 925 return 0; 926} 927 928/* Set/clear or port flags based on attribute */ 929static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[], 930 int attrtype, unsigned long mask) 931{ 932 if (!tb[attrtype]) 933 return; 934 935 if (nla_get_u8(tb[attrtype])) 936 p->flags |= mask; 937 else 938 p->flags &= ~mask; 939} 940 941/* Process bridge protocol info on port */ 942static int br_setport(struct net_bridge_port *p, struct nlattr *tb[], 943 struct netlink_ext_ack *extack) 944{ 945 unsigned long old_flags, changed_mask; 946 bool br_vlan_tunnel_old; 947 int err; 948 949 old_flags = p->flags; 950 br_vlan_tunnel_old = (old_flags & BR_VLAN_TUNNEL) ? true : false; 951 952 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE); 953 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD); 954 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, 955 BR_MULTICAST_FAST_LEAVE); 956 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK); 957 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING); 958 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD); 959 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD); 960 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, 961 BR_MULTICAST_TO_UNICAST); 962 br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD); 963 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP); 964 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI); 965 br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL); 966 br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS, BR_NEIGH_SUPPRESS); 967 br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED); 968 br_set_port_flag(p, tb, IFLA_BRPORT_LOCKED, BR_PORT_LOCKED); 969 br_set_port_flag(p, tb, IFLA_BRPORT_MAB, BR_PORT_MAB); 970 br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_VLAN_SUPPRESS, 971 BR_NEIGH_VLAN_SUPPRESS); 972 973 if ((p->flags & BR_PORT_MAB) && 974 (!(p->flags & BR_PORT_LOCKED) || !(p->flags & BR_LEARNING))) { 975 NL_SET_ERR_MSG(extack, "Bridge port must be locked and have learning enabled when MAB is enabled"); 976 p->flags = old_flags; 977 return -EINVAL; 978 } else if (!(p->flags & BR_PORT_MAB) && (old_flags & BR_PORT_MAB)) { 979 struct net_bridge_fdb_flush_desc desc = { 980 .flags = BIT(BR_FDB_LOCKED), 981 .flags_mask = BIT(BR_FDB_LOCKED), 982 .port_ifindex = p->dev->ifindex, 983 }; 984 985 br_fdb_flush(p->br, &desc); 986 } 987 988 changed_mask = old_flags ^ p->flags; 989 990 err = br_switchdev_set_port_flag(p, p->flags, changed_mask, extack); 991 if (err) { 992 p->flags = old_flags; 993 return err; 994 } 995 996 if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL)) 997 nbp_vlan_tunnel_info_flush(p); 998 999 br_port_flags_change(p, changed_mask); 1000 1001 if (tb[IFLA_BRPORT_COST]) { 1002 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST])); 1003 if (err) 1004 return err; 1005 } 1006 1007 if (tb[IFLA_BRPORT_PRIORITY]) { 1008 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY])); 1009 if (err) 1010 return err; 1011 } 1012 1013 if (tb[IFLA_BRPORT_STATE]) { 1014 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE])); 1015 if (err) 1016 return err; 1017 } 1018 1019 if (tb[IFLA_BRPORT_FLUSH]) 1020 br_fdb_delete_by_port(p->br, p, 0, 0); 1021 1022#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1023 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) { 1024 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]); 1025 1026 err = br_multicast_set_port_router(&p->multicast_ctx, 1027 mcast_router); 1028 if (err) 1029 return err; 1030 } 1031 1032 if (tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]) { 1033 u32 hlimit; 1034 1035 hlimit = nla_get_u32(tb[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT]); 1036 err = br_multicast_eht_set_hosts_limit(p, hlimit); 1037 if (err) 1038 return err; 1039 } 1040 1041 if (tb[IFLA_BRPORT_MCAST_MAX_GROUPS]) { 1042 u32 max_groups; 1043 1044 max_groups = nla_get_u32(tb[IFLA_BRPORT_MCAST_MAX_GROUPS]); 1045 br_multicast_ngroups_set_max(&p->multicast_ctx, max_groups); 1046 } 1047#endif 1048 1049 if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) { 1050 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]); 1051 1052 if (fwd_mask & BR_GROUPFWD_MACPAUSE) 1053 return -EINVAL; 1054 p->group_fwd_mask = fwd_mask; 1055 } 1056 1057 if (tb[IFLA_BRPORT_BACKUP_PORT]) { 1058 struct net_device *backup_dev = NULL; 1059 u32 backup_ifindex; 1060 1061 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]); 1062 if (backup_ifindex) { 1063 backup_dev = __dev_get_by_index(dev_net(p->dev), 1064 backup_ifindex); 1065 if (!backup_dev) 1066 return -ENOENT; 1067 } 1068 1069 err = nbp_backup_change(p, backup_dev); 1070 if (err) 1071 return err; 1072 } 1073 1074 if (tb[IFLA_BRPORT_BACKUP_NHID]) { 1075 u32 backup_nhid = nla_get_u32(tb[IFLA_BRPORT_BACKUP_NHID]); 1076 1077 WRITE_ONCE(p->backup_nhid, backup_nhid); 1078 } 1079 1080 return 0; 1081} 1082 1083/* Change state and parameters on port. */ 1084int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags, 1085 struct netlink_ext_ack *extack) 1086{ 1087 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev); 1088 struct nlattr *tb[IFLA_BRPORT_MAX + 1]; 1089 struct net_bridge_port *p; 1090 struct nlattr *protinfo; 1091 struct nlattr *afspec; 1092 bool changed = false; 1093 int err = 0; 1094 1095 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO); 1096 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 1097 if (!protinfo && !afspec) 1098 return 0; 1099 1100 p = br_port_get_rtnl(dev); 1101 /* We want to accept dev as bridge itself if the AF_SPEC 1102 * is set to see if someone is setting vlan info on the bridge 1103 */ 1104 if (!p && !afspec) 1105 return -EINVAL; 1106 1107 if (p && protinfo) { 1108 if (protinfo->nla_type & NLA_F_NESTED) { 1109 err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX, 1110 protinfo, 1111 br_port_policy, 1112 NULL); 1113 if (err) 1114 return err; 1115 1116 spin_lock_bh(&p->br->lock); 1117 err = br_setport(p, tb, extack); 1118 spin_unlock_bh(&p->br->lock); 1119 } else { 1120 /* Binary compatibility with old RSTP */ 1121 if (nla_len(protinfo) < sizeof(u8)) 1122 return -EINVAL; 1123 1124 spin_lock_bh(&p->br->lock); 1125 err = br_set_port_state(p, nla_get_u8(protinfo)); 1126 spin_unlock_bh(&p->br->lock); 1127 } 1128 if (err) 1129 goto out; 1130 changed = true; 1131 } 1132 1133 if (afspec) 1134 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack); 1135 1136 if (changed) 1137 br_ifinfo_notify(RTM_NEWLINK, br, p); 1138out: 1139 return err; 1140} 1141 1142/* Delete port information */ 1143int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 1144{ 1145 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev); 1146 struct net_bridge_port *p; 1147 struct nlattr *afspec; 1148 bool changed = false; 1149 int err = 0; 1150 1151 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 1152 if (!afspec) 1153 return 0; 1154 1155 p = br_port_get_rtnl(dev); 1156 /* We want to accept dev as bridge itself as well */ 1157 if (!p && !netif_is_bridge_master(dev)) 1158 return -EINVAL; 1159 1160 err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL); 1161 if (changed) 1162 /* Send RTM_NEWLINK because userspace 1163 * expects RTM_NEWLINK for vlan dels 1164 */ 1165 br_ifinfo_notify(RTM_NEWLINK, br, p); 1166 1167 return err; 1168} 1169 1170static int br_validate(struct nlattr *tb[], struct nlattr *data[], 1171 struct netlink_ext_ack *extack) 1172{ 1173 if (tb[IFLA_ADDRESS]) { 1174 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 1175 return -EINVAL; 1176 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 1177 return -EADDRNOTAVAIL; 1178 } 1179 1180 if (!data) 1181 return 0; 1182 1183#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1184 if (data[IFLA_BR_VLAN_PROTOCOL] && 1185 !eth_type_vlan(nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]))) 1186 return -EPROTONOSUPPORT; 1187 1188 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { 1189 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); 1190 1191 if (defpvid >= VLAN_VID_MASK) 1192 return -EINVAL; 1193 } 1194#endif 1195 1196 return 0; 1197} 1198 1199static int br_port_slave_changelink(struct net_device *brdev, 1200 struct net_device *dev, 1201 struct nlattr *tb[], 1202 struct nlattr *data[], 1203 struct netlink_ext_ack *extack) 1204{ 1205 struct net_bridge *br = netdev_priv(brdev); 1206 int ret; 1207 1208 if (!data) 1209 return 0; 1210 1211 spin_lock_bh(&br->lock); 1212 ret = br_setport(br_port_get_rtnl(dev), data, extack); 1213 spin_unlock_bh(&br->lock); 1214 1215 return ret; 1216} 1217 1218static int br_port_fill_slave_info(struct sk_buff *skb, 1219 const struct net_device *brdev, 1220 const struct net_device *dev) 1221{ 1222 return br_port_fill_attrs(skb, br_port_get_rtnl(dev)); 1223} 1224 1225static size_t br_port_get_slave_size(const struct net_device *brdev, 1226 const struct net_device *dev) 1227{ 1228 return br_port_info_size(); 1229} 1230 1231static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = { 1232 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 }, 1233 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 }, 1234 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 }, 1235 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 }, 1236 [IFLA_BR_STP_STATE] = { .type = NLA_U32 }, 1237 [IFLA_BR_PRIORITY] = { .type = NLA_U16 }, 1238 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 }, 1239 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 }, 1240 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 }, 1241 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY, 1242 .len = ETH_ALEN }, 1243 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 }, 1244 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 }, 1245 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 }, 1246 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 }, 1247 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 }, 1248 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 }, 1249 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 }, 1250 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 }, 1251 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 }, 1252 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 }, 1253 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 }, 1254 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 }, 1255 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 }, 1256 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 }, 1257 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 }, 1258 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 }, 1259 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 }, 1260 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 }, 1261 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 }, 1262 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 }, 1263 [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 }, 1264 [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 }, 1265 [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 }, 1266 [IFLA_BR_MULTI_BOOLOPT] = 1267 NLA_POLICY_EXACT_LEN(sizeof(struct br_boolopt_multi)), 1268}; 1269 1270static int br_changelink(struct net_device *brdev, struct nlattr *tb[], 1271 struct nlattr *data[], 1272 struct netlink_ext_ack *extack) 1273{ 1274 struct net_bridge *br = netdev_priv(brdev); 1275 int err; 1276 1277 if (!data) 1278 return 0; 1279 1280 if (data[IFLA_BR_FORWARD_DELAY]) { 1281 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY])); 1282 if (err) 1283 return err; 1284 } 1285 1286 if (data[IFLA_BR_HELLO_TIME]) { 1287 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME])); 1288 if (err) 1289 return err; 1290 } 1291 1292 if (data[IFLA_BR_MAX_AGE]) { 1293 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE])); 1294 if (err) 1295 return err; 1296 } 1297 1298 if (data[IFLA_BR_AGEING_TIME]) { 1299 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME])); 1300 if (err) 1301 return err; 1302 } 1303 1304 if (data[IFLA_BR_STP_STATE]) { 1305 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]); 1306 1307 err = br_stp_set_enabled(br, stp_enabled, extack); 1308 if (err) 1309 return err; 1310 } 1311 1312 if (data[IFLA_BR_PRIORITY]) { 1313 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]); 1314 1315 br_stp_set_bridge_priority(br, priority); 1316 } 1317 1318 if (data[IFLA_BR_VLAN_FILTERING]) { 1319 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]); 1320 1321 err = br_vlan_filter_toggle(br, vlan_filter, extack); 1322 if (err) 1323 return err; 1324 } 1325 1326#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1327 if (data[IFLA_BR_VLAN_PROTOCOL]) { 1328 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]); 1329 1330 err = __br_vlan_set_proto(br, vlan_proto, extack); 1331 if (err) 1332 return err; 1333 } 1334 1335 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { 1336 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); 1337 1338 err = __br_vlan_set_default_pvid(br, defpvid, extack); 1339 if (err) 1340 return err; 1341 } 1342 1343 if (data[IFLA_BR_VLAN_STATS_ENABLED]) { 1344 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]); 1345 1346 err = br_vlan_set_stats(br, vlan_stats); 1347 if (err) 1348 return err; 1349 } 1350 1351 if (data[IFLA_BR_VLAN_STATS_PER_PORT]) { 1352 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]); 1353 1354 err = br_vlan_set_stats_per_port(br, per_port); 1355 if (err) 1356 return err; 1357 } 1358#endif 1359 1360 if (data[IFLA_BR_GROUP_FWD_MASK]) { 1361 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]); 1362 1363 if (fwd_mask & BR_GROUPFWD_RESTRICTED) 1364 return -EINVAL; 1365 br->group_fwd_mask = fwd_mask; 1366 } 1367 1368 if (data[IFLA_BR_GROUP_ADDR]) { 1369 u8 new_addr[ETH_ALEN]; 1370 1371 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN) 1372 return -EINVAL; 1373 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN); 1374 if (!is_link_local_ether_addr(new_addr)) 1375 return -EINVAL; 1376 if (new_addr[5] == 1 || /* 802.3x Pause address */ 1377 new_addr[5] == 2 || /* 802.3ad Slow protocols */ 1378 new_addr[5] == 3) /* 802.1X PAE address */ 1379 return -EINVAL; 1380 spin_lock_bh(&br->lock); 1381 memcpy(br->group_addr, new_addr, sizeof(br->group_addr)); 1382 spin_unlock_bh(&br->lock); 1383 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true); 1384 br_recalculate_fwd_mask(br); 1385 } 1386 1387 if (data[IFLA_BR_FDB_FLUSH]) { 1388 struct net_bridge_fdb_flush_desc desc = { 1389 .flags_mask = BIT(BR_FDB_STATIC) 1390 }; 1391 1392 br_fdb_flush(br, &desc); 1393 } 1394 1395#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1396 if (data[IFLA_BR_MCAST_ROUTER]) { 1397 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]); 1398 1399 err = br_multicast_set_router(&br->multicast_ctx, 1400 multicast_router); 1401 if (err) 1402 return err; 1403 } 1404 1405 if (data[IFLA_BR_MCAST_SNOOPING]) { 1406 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]); 1407 1408 err = br_multicast_toggle(br, mcast_snooping, extack); 1409 if (err) 1410 return err; 1411 } 1412 1413 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) { 1414 u8 val; 1415 1416 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]); 1417 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val); 1418 } 1419 1420 if (data[IFLA_BR_MCAST_QUERIER]) { 1421 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]); 1422 1423 err = br_multicast_set_querier(&br->multicast_ctx, 1424 mcast_querier); 1425 if (err) 1426 return err; 1427 } 1428 1429 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) 1430 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n", 1431 RHT_ELASTICITY); 1432 1433 if (data[IFLA_BR_MCAST_HASH_MAX]) 1434 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]); 1435 1436 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) { 1437 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]); 1438 1439 br->multicast_ctx.multicast_last_member_count = val; 1440 } 1441 1442 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) { 1443 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]); 1444 1445 br->multicast_ctx.multicast_startup_query_count = val; 1446 } 1447 1448 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) { 1449 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]); 1450 1451 br->multicast_ctx.multicast_last_member_interval = clock_t_to_jiffies(val); 1452 } 1453 1454 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) { 1455 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]); 1456 1457 br->multicast_ctx.multicast_membership_interval = clock_t_to_jiffies(val); 1458 } 1459 1460 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) { 1461 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]); 1462 1463 br->multicast_ctx.multicast_querier_interval = clock_t_to_jiffies(val); 1464 } 1465 1466 if (data[IFLA_BR_MCAST_QUERY_INTVL]) { 1467 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]); 1468 1469 br_multicast_set_query_intvl(&br->multicast_ctx, val); 1470 } 1471 1472 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) { 1473 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]); 1474 1475 br->multicast_ctx.multicast_query_response_interval = clock_t_to_jiffies(val); 1476 } 1477 1478 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) { 1479 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]); 1480 1481 br_multicast_set_startup_query_intvl(&br->multicast_ctx, val); 1482 } 1483 1484 if (data[IFLA_BR_MCAST_STATS_ENABLED]) { 1485 __u8 mcast_stats; 1486 1487 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]); 1488 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats); 1489 } 1490 1491 if (data[IFLA_BR_MCAST_IGMP_VERSION]) { 1492 __u8 igmp_version; 1493 1494 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]); 1495 err = br_multicast_set_igmp_version(&br->multicast_ctx, 1496 igmp_version); 1497 if (err) 1498 return err; 1499 } 1500 1501#if IS_ENABLED(CONFIG_IPV6) 1502 if (data[IFLA_BR_MCAST_MLD_VERSION]) { 1503 __u8 mld_version; 1504 1505 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]); 1506 err = br_multicast_set_mld_version(&br->multicast_ctx, 1507 mld_version); 1508 if (err) 1509 return err; 1510 } 1511#endif 1512#endif 1513#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1514 if (data[IFLA_BR_NF_CALL_IPTABLES]) { 1515 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]); 1516 1517 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val); 1518 } 1519 1520 if (data[IFLA_BR_NF_CALL_IP6TABLES]) { 1521 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]); 1522 1523 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val); 1524 } 1525 1526 if (data[IFLA_BR_NF_CALL_ARPTABLES]) { 1527 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]); 1528 1529 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val); 1530 } 1531#endif 1532 1533 if (data[IFLA_BR_MULTI_BOOLOPT]) { 1534 struct br_boolopt_multi *bm; 1535 1536 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]); 1537 err = br_boolopt_multi_toggle(br, bm, extack); 1538 if (err) 1539 return err; 1540 } 1541 1542 return 0; 1543} 1544 1545static int br_dev_newlink(struct net *src_net, struct net_device *dev, 1546 struct nlattr *tb[], struct nlattr *data[], 1547 struct netlink_ext_ack *extack) 1548{ 1549 struct net_bridge *br = netdev_priv(dev); 1550 int err; 1551 1552 err = register_netdevice(dev); 1553 if (err) 1554 return err; 1555 1556 if (tb[IFLA_ADDRESS]) { 1557 spin_lock_bh(&br->lock); 1558 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS])); 1559 spin_unlock_bh(&br->lock); 1560 } 1561 1562 err = br_changelink(dev, tb, data, extack); 1563 if (err) 1564 br_dev_delete(dev, NULL); 1565 1566 return err; 1567} 1568 1569static size_t br_get_size(const struct net_device *brdev) 1570{ 1571 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */ 1572 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */ 1573 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */ 1574 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */ 1575 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */ 1576 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */ 1577 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */ 1578#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1579 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */ 1580 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */ 1581 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */ 1582 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_PER_PORT */ 1583#endif 1584 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */ 1585 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */ 1586 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */ 1587 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */ 1588 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */ 1589 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */ 1590 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */ 1591 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */ 1592 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */ 1593 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */ 1594 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */ 1595 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */ 1596#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1597 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */ 1598 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */ 1599 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */ 1600 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */ 1601 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */ 1602 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */ 1603 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */ 1604 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */ 1605 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */ 1606 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */ 1607 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */ 1608 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */ 1609 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */ 1610 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */ 1611 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */ 1612 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */ 1613 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */ 1614 br_multicast_querier_state_size() + /* IFLA_BR_MCAST_QUERIER_STATE */ 1615#endif 1616#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1617 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */ 1618 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */ 1619 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */ 1620#endif 1621 nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */ 1622 0; 1623} 1624 1625static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev) 1626{ 1627 struct net_bridge *br = netdev_priv(brdev); 1628 u32 forward_delay = jiffies_to_clock_t(br->forward_delay); 1629 u32 hello_time = jiffies_to_clock_t(br->hello_time); 1630 u32 age_time = jiffies_to_clock_t(br->max_age); 1631 u32 ageing_time = jiffies_to_clock_t(br->ageing_time); 1632 u32 stp_enabled = br->stp_enabled; 1633 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]; 1634 u8 vlan_enabled = br_vlan_enabled(br->dev); 1635 struct br_boolopt_multi bm; 1636 u64 clockval; 1637 1638 clockval = br_timer_value(&br->hello_timer); 1639 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD)) 1640 return -EMSGSIZE; 1641 clockval = br_timer_value(&br->tcn_timer); 1642 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD)) 1643 return -EMSGSIZE; 1644 clockval = br_timer_value(&br->topology_change_timer); 1645 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval, 1646 IFLA_BR_PAD)) 1647 return -EMSGSIZE; 1648 clockval = br_timer_value(&br->gc_work.timer); 1649 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD)) 1650 return -EMSGSIZE; 1651 1652 br_boolopt_multi_get(br, &bm); 1653 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) || 1654 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) || 1655 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) || 1656 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) || 1657 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) || 1658 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) || 1659 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) || 1660 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) || 1661 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id), 1662 &br->bridge_id) || 1663 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id), 1664 &br->designated_root) || 1665 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) || 1666 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) || 1667 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) || 1668 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED, 1669 br->topology_change_detected) || 1670 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) || 1671 nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm)) 1672 return -EMSGSIZE; 1673 1674#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1675 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) || 1676 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) || 1677 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, 1678 br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) || 1679 nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT, 1680 br_opt_get(br, BROPT_VLAN_STATS_PER_PORT))) 1681 return -EMSGSIZE; 1682#endif 1683#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1684 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, 1685 br->multicast_ctx.multicast_router) || 1686 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, 1687 br_opt_get(br, BROPT_MULTICAST_ENABLED)) || 1688 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR, 1689 br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) || 1690 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, 1691 br->multicast_ctx.multicast_querier) || 1692 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED, 1693 br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) || 1694 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) || 1695 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) || 1696 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT, 1697 br->multicast_ctx.multicast_last_member_count) || 1698 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT, 1699 br->multicast_ctx.multicast_startup_query_count) || 1700 nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION, 1701 br->multicast_ctx.multicast_igmp_version) || 1702 br_multicast_dump_querier_state(skb, &br->multicast_ctx, 1703 IFLA_BR_MCAST_QUERIER_STATE)) 1704 return -EMSGSIZE; 1705#if IS_ENABLED(CONFIG_IPV6) 1706 if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION, 1707 br->multicast_ctx.multicast_mld_version)) 1708 return -EMSGSIZE; 1709#endif 1710 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_last_member_interval); 1711 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval, 1712 IFLA_BR_PAD)) 1713 return -EMSGSIZE; 1714 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_membership_interval); 1715 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval, 1716 IFLA_BR_PAD)) 1717 return -EMSGSIZE; 1718 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_querier_interval); 1719 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval, 1720 IFLA_BR_PAD)) 1721 return -EMSGSIZE; 1722 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_interval); 1723 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval, 1724 IFLA_BR_PAD)) 1725 return -EMSGSIZE; 1726 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_query_response_interval); 1727 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval, 1728 IFLA_BR_PAD)) 1729 return -EMSGSIZE; 1730 clockval = jiffies_to_clock_t(br->multicast_ctx.multicast_startup_query_interval); 1731 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval, 1732 IFLA_BR_PAD)) 1733 return -EMSGSIZE; 1734#endif 1735#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1736 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES, 1737 br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) || 1738 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES, 1739 br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) || 1740 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES, 1741 br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0)) 1742 return -EMSGSIZE; 1743#endif 1744 1745 return 0; 1746} 1747 1748static size_t br_get_linkxstats_size(const struct net_device *dev, int attr) 1749{ 1750 struct net_bridge_port *p = NULL; 1751 struct net_bridge_vlan_group *vg; 1752 struct net_bridge_vlan *v; 1753 struct net_bridge *br; 1754 int numvls = 0; 1755 1756 switch (attr) { 1757 case IFLA_STATS_LINK_XSTATS: 1758 br = netdev_priv(dev); 1759 vg = br_vlan_group(br); 1760 break; 1761 case IFLA_STATS_LINK_XSTATS_SLAVE: 1762 p = br_port_get_rtnl(dev); 1763 if (!p) 1764 return 0; 1765 vg = nbp_vlan_group(p); 1766 break; 1767 default: 1768 return 0; 1769 } 1770 1771 if (vg) { 1772 /* we need to count all, even placeholder entries */ 1773 list_for_each_entry(v, &vg->vlan_list, vlist) 1774 numvls++; 1775 } 1776 1777 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) + 1778 nla_total_size_64bit(sizeof(struct br_mcast_stats)) + 1779 (p ? nla_total_size_64bit(sizeof(p->stp_xstats)) : 0) + 1780 nla_total_size(0); 1781} 1782 1783static int br_fill_linkxstats(struct sk_buff *skb, 1784 const struct net_device *dev, 1785 int *prividx, int attr) 1786{ 1787 struct nlattr *nla __maybe_unused; 1788 struct net_bridge_port *p = NULL; 1789 struct net_bridge_vlan_group *vg; 1790 struct net_bridge_vlan *v; 1791 struct net_bridge *br; 1792 struct nlattr *nest; 1793 int vl_idx = 0; 1794 1795 switch (attr) { 1796 case IFLA_STATS_LINK_XSTATS: 1797 br = netdev_priv(dev); 1798 vg = br_vlan_group(br); 1799 break; 1800 case IFLA_STATS_LINK_XSTATS_SLAVE: 1801 p = br_port_get_rtnl(dev); 1802 if (!p) 1803 return 0; 1804 br = p->br; 1805 vg = nbp_vlan_group(p); 1806 break; 1807 default: 1808 return -EINVAL; 1809 } 1810 1811 nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE); 1812 if (!nest) 1813 return -EMSGSIZE; 1814 1815 if (vg) { 1816 u16 pvid; 1817 1818 pvid = br_get_pvid(vg); 1819 list_for_each_entry(v, &vg->vlan_list, vlist) { 1820 struct bridge_vlan_xstats vxi; 1821 struct pcpu_sw_netstats stats; 1822 1823 if (++vl_idx < *prividx) 1824 continue; 1825 memset(&vxi, 0, sizeof(vxi)); 1826 vxi.vid = v->vid; 1827 vxi.flags = v->flags; 1828 if (v->vid == pvid) 1829 vxi.flags |= BRIDGE_VLAN_INFO_PVID; 1830 br_vlan_get_stats(v, &stats); 1831 vxi.rx_bytes = u64_stats_read(&stats.rx_bytes); 1832 vxi.rx_packets = u64_stats_read(&stats.rx_packets); 1833 vxi.tx_bytes = u64_stats_read(&stats.tx_bytes); 1834 vxi.tx_packets = u64_stats_read(&stats.tx_packets); 1835 1836 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi)) 1837 goto nla_put_failure; 1838 } 1839 } 1840 1841#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1842 if (++vl_idx >= *prividx) { 1843 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST, 1844 sizeof(struct br_mcast_stats), 1845 BRIDGE_XSTATS_PAD); 1846 if (!nla) 1847 goto nla_put_failure; 1848 br_multicast_get_stats(br, p, nla_data(nla)); 1849 } 1850#endif 1851 1852 if (p) { 1853 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP, 1854 sizeof(p->stp_xstats), 1855 BRIDGE_XSTATS_PAD); 1856 if (!nla) 1857 goto nla_put_failure; 1858 1859 spin_lock_bh(&br->lock); 1860 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats)); 1861 spin_unlock_bh(&br->lock); 1862 } 1863 1864 nla_nest_end(skb, nest); 1865 *prividx = 0; 1866 1867 return 0; 1868 1869nla_put_failure: 1870 nla_nest_end(skb, nest); 1871 *prividx = vl_idx; 1872 1873 return -EMSGSIZE; 1874} 1875 1876static struct rtnl_af_ops br_af_ops __read_mostly = { 1877 .family = AF_BRIDGE, 1878 .get_link_af_size = br_get_link_af_size_filtered, 1879}; 1880 1881struct rtnl_link_ops br_link_ops __read_mostly = { 1882 .kind = "bridge", 1883 .priv_size = sizeof(struct net_bridge), 1884 .setup = br_dev_setup, 1885 .maxtype = IFLA_BR_MAX, 1886 .policy = br_policy, 1887 .validate = br_validate, 1888 .newlink = br_dev_newlink, 1889 .changelink = br_changelink, 1890 .dellink = br_dev_delete, 1891 .get_size = br_get_size, 1892 .fill_info = br_fill_info, 1893 .fill_linkxstats = br_fill_linkxstats, 1894 .get_linkxstats_size = br_get_linkxstats_size, 1895 1896 .slave_maxtype = IFLA_BRPORT_MAX, 1897 .slave_policy = br_port_policy, 1898 .slave_changelink = br_port_slave_changelink, 1899 .get_slave_size = br_port_get_slave_size, 1900 .fill_slave_info = br_port_fill_slave_info, 1901}; 1902 1903int __init br_netlink_init(void) 1904{ 1905 int err; 1906 1907 br_vlan_rtnl_init(); 1908 rtnl_af_register(&br_af_ops); 1909 1910 err = rtnl_link_register(&br_link_ops); 1911 if (err) 1912 goto out_af; 1913 1914 return 0; 1915 1916out_af: 1917 rtnl_af_unregister(&br_af_ops); 1918 return err; 1919} 1920 1921void br_netlink_fini(void) 1922{ 1923 br_vlan_rtnl_uninit(); 1924 rtnl_af_unregister(&br_af_ops); 1925 rtnl_link_unregister(&br_link_ops); 1926} 1927