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 22 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg, 23 u32 filter_mask) 24 { 25 struct net_bridge_vlan *v; 26 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0; 27 u16 flags, pvid; 28 int num_vlans = 0; 29 30 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) 31 return 0; 32 33 pvid = br_get_pvid(vg); 34 /* Count number of vlan infos */ 35 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 36 flags = 0; 37 /* only a context, bridge vlan not activated */ 38 if (!br_vlan_should_use(v)) 39 continue; 40 if (v->vid == pvid) 41 flags |= BRIDGE_VLAN_INFO_PVID; 42 43 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 44 flags |= BRIDGE_VLAN_INFO_UNTAGGED; 45 46 if (vid_range_start == 0) { 47 goto initvars; 48 } else if ((v->vid - vid_range_end) == 1 && 49 flags == vid_range_flags) { 50 vid_range_end = v->vid; 51 continue; 52 } else { 53 if ((vid_range_end - vid_range_start) > 0) 54 num_vlans += 2; 55 else 56 num_vlans += 1; 57 } 58 initvars: 59 vid_range_start = v->vid; 60 vid_range_end = v->vid; 61 vid_range_flags = flags; 62 } 63 64 if (vid_range_start != 0) { 65 if ((vid_range_end - vid_range_start) > 0) 66 num_vlans += 2; 67 else 68 num_vlans += 1; 69 } 70 71 return num_vlans; 72 } 73 74 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg, 75 u32 filter_mask) 76 { 77 int num_vlans; 78 79 if (!vg) 80 return 0; 81 82 if (filter_mask & RTEXT_FILTER_BRVLAN) 83 return vg->num_vlans; 84 85 rcu_read_lock(); 86 num_vlans = __get_num_vlan_infos(vg, filter_mask); 87 rcu_read_unlock(); 88 89 return num_vlans; 90 } 91 92 static size_t br_get_link_af_size_filtered(const struct net_device *dev, 93 u32 filter_mask) 94 { 95 struct net_bridge_vlan_group *vg = NULL; 96 struct net_bridge_port *p = NULL; 97 struct net_bridge *br; 98 int num_vlan_infos; 99 size_t vinfo_sz = 0; 100 101 rcu_read_lock(); 102 if (netif_is_bridge_port(dev)) { 103 p = br_port_get_rcu(dev); 104 vg = nbp_vlan_group_rcu(p); 105 } else if (dev->priv_flags & IFF_EBRIDGE) { 106 br = netdev_priv(dev); 107 vg = br_vlan_group_rcu(br); 108 } 109 num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask); 110 rcu_read_unlock(); 111 112 if (p && (p->flags & BR_VLAN_TUNNEL)) 113 vinfo_sz += br_get_vlan_tunnel_info_size(vg); 114 115 /* Each VLAN is returned in bridge_vlan_info along with flags */ 116 vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info)); 117 118 return vinfo_sz; 119 } 120 121 static inline size_t br_port_info_size(void) 122 { 123 return nla_total_size(1) /* IFLA_BRPORT_STATE */ 124 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */ 125 + nla_total_size(4) /* IFLA_BRPORT_COST */ 126 + nla_total_size(1) /* IFLA_BRPORT_MODE */ 127 + nla_total_size(1) /* IFLA_BRPORT_GUARD */ 128 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */ 129 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */ 130 + nla_total_size(1) /* IFLA_BRPORT_MCAST_TO_UCAST */ 131 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */ 132 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */ 133 + nla_total_size(1) /* IFLA_BRPORT_MCAST_FLOOD */ 134 + nla_total_size(1) /* IFLA_BRPORT_BCAST_FLOOD */ 135 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */ 136 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */ 137 + nla_total_size(1) /* IFLA_BRPORT_VLAN_TUNNEL */ 138 + nla_total_size(1) /* IFLA_BRPORT_NEIGH_SUPPRESS */ 139 + nla_total_size(1) /* IFLA_BRPORT_ISOLATED */ 140 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */ 141 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */ 142 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */ 143 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */ 144 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */ 145 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */ 146 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */ 147 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */ 148 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */ 149 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */ 150 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */ 151 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 152 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */ 153 #endif 154 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_GROUP_FWD_MASK */ 155 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MRP_RING_OPEN */ 156 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MRP_IN_OPEN */ 157 + 0; 158 } 159 160 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask) 161 { 162 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 163 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 164 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 165 + nla_total_size(4) /* IFLA_MASTER */ 166 + nla_total_size(4) /* IFLA_MTU */ 167 + nla_total_size(4) /* IFLA_LINK */ 168 + nla_total_size(1) /* IFLA_OPERSTATE */ 169 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */ 170 + nla_total_size(br_get_link_af_size_filtered(dev, 171 filter_mask)) /* IFLA_AF_SPEC */ 172 + nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */ 173 } 174 175 static int br_port_fill_attrs(struct sk_buff *skb, 176 const struct net_bridge_port *p) 177 { 178 u8 mode = !!(p->flags & BR_HAIRPIN_MODE); 179 struct net_bridge_port *backup_p; 180 u64 timerval; 181 182 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) || 183 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) || 184 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) || 185 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) || 186 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) || 187 nla_put_u8(skb, IFLA_BRPORT_PROTECT, 188 !!(p->flags & BR_ROOT_BLOCK)) || 189 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, 190 !!(p->flags & BR_MULTICAST_FAST_LEAVE)) || 191 nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST, 192 !!(p->flags & BR_MULTICAST_TO_UNICAST)) || 193 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) || 194 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, 195 !!(p->flags & BR_FLOOD)) || 196 nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD, 197 !!(p->flags & BR_MCAST_FLOOD)) || 198 nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD, 199 !!(p->flags & BR_BCAST_FLOOD)) || 200 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) || 201 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI, 202 !!(p->flags & BR_PROXYARP_WIFI)) || 203 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id), 204 &p->designated_root) || 205 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id), 206 &p->designated_bridge) || 207 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) || 208 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) || 209 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) || 210 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) || 211 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK, 212 p->topology_change_ack) || 213 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) || 214 nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags & 215 BR_VLAN_TUNNEL)) || 216 nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) || 217 nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS, 218 !!(p->flags & BR_NEIGH_SUPPRESS)) || 219 nla_put_u8(skb, IFLA_BRPORT_MRP_RING_OPEN, !!(p->flags & 220 BR_MRP_LOST_CONT)) || 221 nla_put_u8(skb, IFLA_BRPORT_MRP_IN_OPEN, 222 !!(p->flags & BR_MRP_LOST_IN_CONT)) || 223 nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED))) 224 return -EMSGSIZE; 225 226 timerval = br_timer_value(&p->message_age_timer); 227 if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval, 228 IFLA_BRPORT_PAD)) 229 return -EMSGSIZE; 230 timerval = br_timer_value(&p->forward_delay_timer); 231 if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval, 232 IFLA_BRPORT_PAD)) 233 return -EMSGSIZE; 234 timerval = br_timer_value(&p->hold_timer); 235 if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval, 236 IFLA_BRPORT_PAD)) 237 return -EMSGSIZE; 238 239 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 240 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER, 241 p->multicast_router)) 242 return -EMSGSIZE; 243 #endif 244 245 /* we might be called only with br->lock */ 246 rcu_read_lock(); 247 backup_p = rcu_dereference(p->backup_port); 248 if (backup_p) 249 nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT, 250 backup_p->dev->ifindex); 251 rcu_read_unlock(); 252 253 return 0; 254 } 255 256 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start, 257 u16 vid_end, u16 flags) 258 { 259 struct bridge_vlan_info vinfo; 260 261 if ((vid_end - vid_start) > 0) { 262 /* add range to skb */ 263 vinfo.vid = vid_start; 264 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN; 265 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 266 sizeof(vinfo), &vinfo)) 267 goto nla_put_failure; 268 269 vinfo.vid = vid_end; 270 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END; 271 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 272 sizeof(vinfo), &vinfo)) 273 goto nla_put_failure; 274 } else { 275 vinfo.vid = vid_start; 276 vinfo.flags = flags; 277 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 278 sizeof(vinfo), &vinfo)) 279 goto nla_put_failure; 280 } 281 282 return 0; 283 284 nla_put_failure: 285 return -EMSGSIZE; 286 } 287 288 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb, 289 struct net_bridge_vlan_group *vg) 290 { 291 struct net_bridge_vlan *v; 292 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0; 293 u16 flags, pvid; 294 int err = 0; 295 296 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan 297 * and mark vlan info with begin and end flags 298 * if vlaninfo represents a range 299 */ 300 pvid = br_get_pvid(vg); 301 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 302 flags = 0; 303 if (!br_vlan_should_use(v)) 304 continue; 305 if (v->vid == pvid) 306 flags |= BRIDGE_VLAN_INFO_PVID; 307 308 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 309 flags |= BRIDGE_VLAN_INFO_UNTAGGED; 310 311 if (vid_range_start == 0) { 312 goto initvars; 313 } else if ((v->vid - vid_range_end) == 1 && 314 flags == vid_range_flags) { 315 vid_range_end = v->vid; 316 continue; 317 } else { 318 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 319 vid_range_end, 320 vid_range_flags); 321 if (err) 322 return err; 323 } 324 325 initvars: 326 vid_range_start = v->vid; 327 vid_range_end = v->vid; 328 vid_range_flags = flags; 329 } 330 331 if (vid_range_start != 0) { 332 /* Call it once more to send any left over vlans */ 333 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 334 vid_range_end, 335 vid_range_flags); 336 if (err) 337 return err; 338 } 339 340 return 0; 341 } 342 343 static int br_fill_ifvlaninfo(struct sk_buff *skb, 344 struct net_bridge_vlan_group *vg) 345 { 346 struct bridge_vlan_info vinfo; 347 struct net_bridge_vlan *v; 348 u16 pvid; 349 350 pvid = br_get_pvid(vg); 351 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 352 if (!br_vlan_should_use(v)) 353 continue; 354 355 vinfo.vid = v->vid; 356 vinfo.flags = 0; 357 if (v->vid == pvid) 358 vinfo.flags |= BRIDGE_VLAN_INFO_PVID; 359 360 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 361 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 362 363 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 364 sizeof(vinfo), &vinfo)) 365 goto nla_put_failure; 366 } 367 368 return 0; 369 370 nla_put_failure: 371 return -EMSGSIZE; 372 } 373 374 /* 375 * Create one netlink message for one interface 376 * Contains port and master info as well as carrier and bridge state. 377 */ 378 static int br_fill_ifinfo(struct sk_buff *skb, 379 const struct net_bridge_port *port, 380 u32 pid, u32 seq, int event, unsigned int flags, 381 u32 filter_mask, const struct net_device *dev) 382 { 383 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 384 struct nlattr *af = NULL; 385 struct net_bridge *br; 386 struct ifinfomsg *hdr; 387 struct nlmsghdr *nlh; 388 389 if (port) 390 br = port->br; 391 else 392 br = netdev_priv(dev); 393 394 br_debug(br, "br_fill_info event %d port %s master %s\n", 395 event, dev->name, br->dev->name); 396 397 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); 398 if (nlh == NULL) 399 return -EMSGSIZE; 400 401 hdr = nlmsg_data(nlh); 402 hdr->ifi_family = AF_BRIDGE; 403 hdr->__ifi_pad = 0; 404 hdr->ifi_type = dev->type; 405 hdr->ifi_index = dev->ifindex; 406 hdr->ifi_flags = dev_get_flags(dev); 407 hdr->ifi_change = 0; 408 409 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 410 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) || 411 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 412 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 413 (dev->addr_len && 414 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 415 (dev->ifindex != dev_get_iflink(dev) && 416 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 417 goto nla_put_failure; 418 419 if (event == RTM_NEWLINK && port) { 420 struct nlattr *nest; 421 422 nest = nla_nest_start(skb, IFLA_PROTINFO); 423 if (nest == NULL || br_port_fill_attrs(skb, port) < 0) 424 goto nla_put_failure; 425 nla_nest_end(skb, nest); 426 } 427 428 if (filter_mask & (RTEXT_FILTER_BRVLAN | 429 RTEXT_FILTER_BRVLAN_COMPRESSED | 430 RTEXT_FILTER_MRP | 431 RTEXT_FILTER_CFM_CONFIG)) { 432 af = nla_nest_start_noflag(skb, IFLA_AF_SPEC); 433 if (!af) 434 goto nla_put_failure; 435 } 436 437 /* Check if the VID information is requested */ 438 if ((filter_mask & RTEXT_FILTER_BRVLAN) || 439 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { 440 struct net_bridge_vlan_group *vg; 441 int err; 442 443 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */ 444 rcu_read_lock(); 445 if (port) 446 vg = nbp_vlan_group_rcu(port); 447 else 448 vg = br_vlan_group_rcu(br); 449 450 if (!vg || !vg->num_vlans) { 451 rcu_read_unlock(); 452 goto done; 453 } 454 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) 455 err = br_fill_ifvlaninfo_compressed(skb, vg); 456 else 457 err = br_fill_ifvlaninfo(skb, vg); 458 459 if (port && (port->flags & BR_VLAN_TUNNEL)) 460 err = br_fill_vlan_tunnel_info(skb, vg); 461 rcu_read_unlock(); 462 if (err) 463 goto nla_put_failure; 464 } 465 466 if (filter_mask & RTEXT_FILTER_MRP) { 467 int err; 468 469 if (!br_mrp_enabled(br) || port) 470 goto done; 471 472 rcu_read_lock(); 473 err = br_mrp_fill_info(skb, br); 474 rcu_read_unlock(); 475 476 if (err) 477 goto nla_put_failure; 478 } 479 480 if (filter_mask & RTEXT_FILTER_CFM_CONFIG) { 481 struct nlattr *cfm_nest = NULL; 482 int err; 483 484 if (!br_cfm_created(br) || port) 485 goto done; 486 487 cfm_nest = nla_nest_start(skb, IFLA_BRIDGE_CFM); 488 if (!cfm_nest) 489 goto nla_put_failure; 490 491 if (filter_mask & RTEXT_FILTER_CFM_CONFIG) { 492 rcu_read_lock(); 493 err = br_cfm_config_fill_info(skb, br); 494 rcu_read_unlock(); 495 if (err) 496 goto nla_put_failure; 497 } 498 499 nla_nest_end(skb, cfm_nest); 500 } 501 502 done: 503 if (af) 504 nla_nest_end(skb, af); 505 nlmsg_end(skb, nlh); 506 return 0; 507 508 nla_put_failure: 509 nlmsg_cancel(skb, nlh); 510 return -EMSGSIZE; 511 } 512 513 /* Notify listeners of a change in bridge or port information */ 514 void br_ifinfo_notify(int event, const struct net_bridge *br, 515 const struct net_bridge_port *port) 516 { 517 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED; 518 struct net_device *dev; 519 struct sk_buff *skb; 520 int err = -ENOBUFS; 521 struct net *net; 522 u16 port_no = 0; 523 524 if (WARN_ON(!port && !br)) 525 return; 526 527 if (port) { 528 dev = port->dev; 529 br = port->br; 530 port_no = port->port_no; 531 } else { 532 dev = br->dev; 533 } 534 535 net = dev_net(dev); 536 br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event); 537 538 skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC); 539 if (skb == NULL) 540 goto errout; 541 542 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev); 543 if (err < 0) { 544 /* -EMSGSIZE implies BUG in br_nlmsg_size() */ 545 WARN_ON(err == -EMSGSIZE); 546 kfree_skb(skb); 547 goto errout; 548 } 549 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 550 return; 551 errout: 552 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 553 } 554 555 /* 556 * Dump information about all ports, in response to GETLINK 557 */ 558 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 559 struct net_device *dev, u32 filter_mask, int nlflags) 560 { 561 struct net_bridge_port *port = br_port_get_rtnl(dev); 562 563 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) && 564 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) && 565 !(filter_mask & RTEXT_FILTER_MRP) && 566 !(filter_mask & RTEXT_FILTER_CFM_CONFIG)) 567 return 0; 568 569 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags, 570 filter_mask, dev); 571 } 572 573 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p, 574 int cmd, struct bridge_vlan_info *vinfo, bool *changed, 575 struct netlink_ext_ack *extack) 576 { 577 bool curr_change; 578 int err = 0; 579 580 switch (cmd) { 581 case RTM_SETLINK: 582 if (p) { 583 /* if the MASTER flag is set this will act on the global 584 * per-VLAN entry as well 585 */ 586 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags, 587 &curr_change, extack); 588 } else { 589 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY; 590 err = br_vlan_add(br, vinfo->vid, vinfo->flags, 591 &curr_change, extack); 592 } 593 if (curr_change) 594 *changed = true; 595 break; 596 597 case RTM_DELLINK: 598 if (p) { 599 if (!nbp_vlan_delete(p, vinfo->vid)) 600 *changed = true; 601 602 if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) && 603 !br_vlan_delete(p->br, vinfo->vid)) 604 *changed = true; 605 } else if (!br_vlan_delete(br, vinfo->vid)) { 606 *changed = true; 607 } 608 break; 609 } 610 611 return err; 612 } 613 614 int br_process_vlan_info(struct net_bridge *br, 615 struct net_bridge_port *p, int cmd, 616 struct bridge_vlan_info *vinfo_curr, 617 struct bridge_vlan_info **vinfo_last, 618 bool *changed, 619 struct netlink_ext_ack *extack) 620 { 621 int err, rtm_cmd; 622 623 if (!br_vlan_valid_id(vinfo_curr->vid, extack)) 624 return -EINVAL; 625 626 /* needed for vlan-only NEWVLAN/DELVLAN notifications */ 627 rtm_cmd = br_afspec_cmd_to_rtm(cmd); 628 629 if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 630 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack)) 631 return -EINVAL; 632 *vinfo_last = vinfo_curr; 633 return 0; 634 } 635 636 if (*vinfo_last) { 637 struct bridge_vlan_info tmp_vinfo; 638 int v, v_change_start = 0; 639 640 if (!br_vlan_valid_range(vinfo_curr, *vinfo_last, extack)) 641 return -EINVAL; 642 643 memcpy(&tmp_vinfo, *vinfo_last, 644 sizeof(struct bridge_vlan_info)); 645 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) { 646 bool curr_change = false; 647 648 tmp_vinfo.vid = v; 649 err = br_vlan_info(br, p, cmd, &tmp_vinfo, &curr_change, 650 extack); 651 if (err) 652 break; 653 if (curr_change) { 654 *changed = curr_change; 655 if (!v_change_start) 656 v_change_start = v; 657 } else { 658 /* nothing to notify yet */ 659 if (!v_change_start) 660 continue; 661 br_vlan_notify(br, p, v_change_start, 662 v - 1, rtm_cmd); 663 v_change_start = 0; 664 } 665 cond_resched(); 666 } 667 /* v_change_start is set only if the last/whole range changed */ 668 if (v_change_start) 669 br_vlan_notify(br, p, v_change_start, 670 v - 1, rtm_cmd); 671 672 *vinfo_last = NULL; 673 674 return err; 675 } 676 677 err = br_vlan_info(br, p, cmd, vinfo_curr, changed, extack); 678 if (*changed) 679 br_vlan_notify(br, p, vinfo_curr->vid, 0, rtm_cmd); 680 681 return err; 682 } 683 684 static int br_afspec(struct net_bridge *br, 685 struct net_bridge_port *p, 686 struct nlattr *af_spec, 687 int cmd, bool *changed, 688 struct netlink_ext_ack *extack) 689 { 690 struct bridge_vlan_info *vinfo_curr = NULL; 691 struct bridge_vlan_info *vinfo_last = NULL; 692 struct nlattr *attr; 693 struct vtunnel_info tinfo_last = {}; 694 struct vtunnel_info tinfo_curr = {}; 695 int err = 0, rem; 696 697 nla_for_each_nested(attr, af_spec, rem) { 698 err = 0; 699 switch (nla_type(attr)) { 700 case IFLA_BRIDGE_VLAN_TUNNEL_INFO: 701 if (!p || !(p->flags & BR_VLAN_TUNNEL)) 702 return -EINVAL; 703 err = br_parse_vlan_tunnel_info(attr, &tinfo_curr); 704 if (err) 705 return err; 706 err = br_process_vlan_tunnel_info(br, p, cmd, 707 &tinfo_curr, 708 &tinfo_last, 709 changed); 710 if (err) 711 return err; 712 break; 713 case IFLA_BRIDGE_VLAN_INFO: 714 if (nla_len(attr) != sizeof(struct bridge_vlan_info)) 715 return -EINVAL; 716 vinfo_curr = nla_data(attr); 717 err = br_process_vlan_info(br, p, cmd, vinfo_curr, 718 &vinfo_last, changed, 719 extack); 720 if (err) 721 return err; 722 break; 723 case IFLA_BRIDGE_MRP: 724 err = br_mrp_parse(br, p, attr, cmd, extack); 725 if (err) 726 return err; 727 break; 728 case IFLA_BRIDGE_CFM: 729 err = br_cfm_parse(br, p, attr, cmd, extack); 730 if (err) 731 return err; 732 break; 733 } 734 } 735 736 return err; 737 } 738 739 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = { 740 [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, 741 [IFLA_BRPORT_COST] = { .type = NLA_U32 }, 742 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, 743 [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, 744 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, 745 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, 746 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 }, 747 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, 748 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, 749 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 }, 750 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 }, 751 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 }, 752 [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 }, 753 [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 }, 754 [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 }, 755 [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 }, 756 [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 }, 757 [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 }, 758 [IFLA_BRPORT_ISOLATED] = { .type = NLA_U8 }, 759 [IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 }, 760 }; 761 762 /* Change the state of the port and notify spanning tree */ 763 static int br_set_port_state(struct net_bridge_port *p, u8 state) 764 { 765 if (state > BR_STATE_BLOCKING) 766 return -EINVAL; 767 768 /* if kernel STP is running, don't allow changes */ 769 if (p->br->stp_enabled == BR_KERNEL_STP) 770 return -EBUSY; 771 772 /* if device is not up, change is not allowed 773 * if link is not present, only allowable state is disabled 774 */ 775 if (!netif_running(p->dev) || 776 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED)) 777 return -ENETDOWN; 778 779 br_set_state(p, state); 780 br_port_state_selection(p->br); 781 return 0; 782 } 783 784 /* Set/clear or port flags based on attribute */ 785 static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[], 786 int attrtype, unsigned long mask) 787 { 788 unsigned long flags; 789 int err; 790 791 if (!tb[attrtype]) 792 return 0; 793 794 if (nla_get_u8(tb[attrtype])) 795 flags = p->flags | mask; 796 else 797 flags = p->flags & ~mask; 798 799 err = br_switchdev_set_port_flag(p, flags, mask); 800 if (err) 801 return err; 802 803 p->flags = flags; 804 return 0; 805 } 806 807 /* Process bridge protocol info on port */ 808 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[]) 809 { 810 unsigned long old_flags = p->flags; 811 bool br_vlan_tunnel_old = false; 812 int err; 813 814 err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE); 815 if (err) 816 return err; 817 818 err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD); 819 if (err) 820 return err; 821 822 err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE); 823 if (err) 824 return err; 825 826 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK); 827 if (err) 828 return err; 829 830 err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING); 831 if (err) 832 return err; 833 834 err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD); 835 if (err) 836 return err; 837 838 err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD); 839 if (err) 840 return err; 841 842 err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST); 843 if (err) 844 return err; 845 846 err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD); 847 if (err) 848 return err; 849 850 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP); 851 if (err) 852 return err; 853 854 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI); 855 if (err) 856 return err; 857 858 br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false; 859 err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL); 860 if (err) 861 return err; 862 863 if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL)) 864 nbp_vlan_tunnel_info_flush(p); 865 866 if (tb[IFLA_BRPORT_COST]) { 867 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST])); 868 if (err) 869 return err; 870 } 871 872 if (tb[IFLA_BRPORT_PRIORITY]) { 873 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY])); 874 if (err) 875 return err; 876 } 877 878 if (tb[IFLA_BRPORT_STATE]) { 879 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE])); 880 if (err) 881 return err; 882 } 883 884 if (tb[IFLA_BRPORT_FLUSH]) 885 br_fdb_delete_by_port(p->br, p, 0, 0); 886 887 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 888 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) { 889 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]); 890 891 err = br_multicast_set_port_router(p, mcast_router); 892 if (err) 893 return err; 894 } 895 #endif 896 897 if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) { 898 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]); 899 900 if (fwd_mask & BR_GROUPFWD_MACPAUSE) 901 return -EINVAL; 902 p->group_fwd_mask = fwd_mask; 903 } 904 905 err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS, 906 BR_NEIGH_SUPPRESS); 907 if (err) 908 return err; 909 910 err = br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED); 911 if (err) 912 return err; 913 914 if (tb[IFLA_BRPORT_BACKUP_PORT]) { 915 struct net_device *backup_dev = NULL; 916 u32 backup_ifindex; 917 918 backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]); 919 if (backup_ifindex) { 920 backup_dev = __dev_get_by_index(dev_net(p->dev), 921 backup_ifindex); 922 if (!backup_dev) 923 return -ENOENT; 924 } 925 926 err = nbp_backup_change(p, backup_dev); 927 if (err) 928 return err; 929 } 930 931 br_port_flags_change(p, old_flags ^ p->flags); 932 return 0; 933 } 934 935 /* Change state and parameters on port. */ 936 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags, 937 struct netlink_ext_ack *extack) 938 { 939 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev); 940 struct nlattr *tb[IFLA_BRPORT_MAX + 1]; 941 struct net_bridge_port *p; 942 struct nlattr *protinfo; 943 struct nlattr *afspec; 944 bool changed = false; 945 int err = 0; 946 947 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO); 948 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 949 if (!protinfo && !afspec) 950 return 0; 951 952 p = br_port_get_rtnl(dev); 953 /* We want to accept dev as bridge itself if the AF_SPEC 954 * is set to see if someone is setting vlan info on the bridge 955 */ 956 if (!p && !afspec) 957 return -EINVAL; 958 959 if (p && protinfo) { 960 if (protinfo->nla_type & NLA_F_NESTED) { 961 err = nla_parse_nested_deprecated(tb, IFLA_BRPORT_MAX, 962 protinfo, 963 br_port_policy, 964 NULL); 965 if (err) 966 return err; 967 968 spin_lock_bh(&p->br->lock); 969 err = br_setport(p, tb); 970 spin_unlock_bh(&p->br->lock); 971 } else { 972 /* Binary compatibility with old RSTP */ 973 if (nla_len(protinfo) < sizeof(u8)) 974 return -EINVAL; 975 976 spin_lock_bh(&p->br->lock); 977 err = br_set_port_state(p, nla_get_u8(protinfo)); 978 spin_unlock_bh(&p->br->lock); 979 } 980 if (err) 981 goto out; 982 changed = true; 983 } 984 985 if (afspec) 986 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack); 987 988 if (changed) 989 br_ifinfo_notify(RTM_NEWLINK, br, p); 990 out: 991 return err; 992 } 993 994 /* Delete port information */ 995 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 996 { 997 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev); 998 struct net_bridge_port *p; 999 struct nlattr *afspec; 1000 bool changed = false; 1001 int err = 0; 1002 1003 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 1004 if (!afspec) 1005 return 0; 1006 1007 p = br_port_get_rtnl(dev); 1008 /* We want to accept dev as bridge itself as well */ 1009 if (!p && !(dev->priv_flags & IFF_EBRIDGE)) 1010 return -EINVAL; 1011 1012 err = br_afspec(br, p, afspec, RTM_DELLINK, &changed, NULL); 1013 if (changed) 1014 /* Send RTM_NEWLINK because userspace 1015 * expects RTM_NEWLINK for vlan dels 1016 */ 1017 br_ifinfo_notify(RTM_NEWLINK, br, p); 1018 1019 return err; 1020 } 1021 1022 static int br_validate(struct nlattr *tb[], struct nlattr *data[], 1023 struct netlink_ext_ack *extack) 1024 { 1025 if (tb[IFLA_ADDRESS]) { 1026 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 1027 return -EINVAL; 1028 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 1029 return -EADDRNOTAVAIL; 1030 } 1031 1032 if (!data) 1033 return 0; 1034 1035 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1036 if (data[IFLA_BR_VLAN_PROTOCOL]) { 1037 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) { 1038 case htons(ETH_P_8021Q): 1039 case htons(ETH_P_8021AD): 1040 break; 1041 default: 1042 return -EPROTONOSUPPORT; 1043 } 1044 } 1045 1046 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { 1047 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); 1048 1049 if (defpvid >= VLAN_VID_MASK) 1050 return -EINVAL; 1051 } 1052 #endif 1053 1054 return 0; 1055 } 1056 1057 static int br_port_slave_changelink(struct net_device *brdev, 1058 struct net_device *dev, 1059 struct nlattr *tb[], 1060 struct nlattr *data[], 1061 struct netlink_ext_ack *extack) 1062 { 1063 struct net_bridge *br = netdev_priv(brdev); 1064 int ret; 1065 1066 if (!data) 1067 return 0; 1068 1069 spin_lock_bh(&br->lock); 1070 ret = br_setport(br_port_get_rtnl(dev), data); 1071 spin_unlock_bh(&br->lock); 1072 1073 return ret; 1074 } 1075 1076 static int br_port_fill_slave_info(struct sk_buff *skb, 1077 const struct net_device *brdev, 1078 const struct net_device *dev) 1079 { 1080 return br_port_fill_attrs(skb, br_port_get_rtnl(dev)); 1081 } 1082 1083 static size_t br_port_get_slave_size(const struct net_device *brdev, 1084 const struct net_device *dev) 1085 { 1086 return br_port_info_size(); 1087 } 1088 1089 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = { 1090 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 }, 1091 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 }, 1092 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 }, 1093 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 }, 1094 [IFLA_BR_STP_STATE] = { .type = NLA_U32 }, 1095 [IFLA_BR_PRIORITY] = { .type = NLA_U16 }, 1096 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 }, 1097 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 }, 1098 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 }, 1099 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY, 1100 .len = ETH_ALEN }, 1101 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 }, 1102 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 }, 1103 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 }, 1104 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 }, 1105 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 }, 1106 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 }, 1107 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 }, 1108 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 }, 1109 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 }, 1110 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 }, 1111 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 }, 1112 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 }, 1113 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 }, 1114 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 }, 1115 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 }, 1116 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 }, 1117 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 }, 1118 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 }, 1119 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 }, 1120 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 }, 1121 [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 }, 1122 [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 }, 1123 [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 }, 1124 [IFLA_BR_MULTI_BOOLOPT] = 1125 NLA_POLICY_EXACT_LEN(sizeof(struct br_boolopt_multi)), 1126 }; 1127 1128 static int br_changelink(struct net_device *brdev, struct nlattr *tb[], 1129 struct nlattr *data[], 1130 struct netlink_ext_ack *extack) 1131 { 1132 struct net_bridge *br = netdev_priv(brdev); 1133 int err; 1134 1135 if (!data) 1136 return 0; 1137 1138 if (data[IFLA_BR_FORWARD_DELAY]) { 1139 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY])); 1140 if (err) 1141 return err; 1142 } 1143 1144 if (data[IFLA_BR_HELLO_TIME]) { 1145 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME])); 1146 if (err) 1147 return err; 1148 } 1149 1150 if (data[IFLA_BR_MAX_AGE]) { 1151 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE])); 1152 if (err) 1153 return err; 1154 } 1155 1156 if (data[IFLA_BR_AGEING_TIME]) { 1157 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME])); 1158 if (err) 1159 return err; 1160 } 1161 1162 if (data[IFLA_BR_STP_STATE]) { 1163 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]); 1164 1165 err = br_stp_set_enabled(br, stp_enabled, extack); 1166 if (err) 1167 return err; 1168 } 1169 1170 if (data[IFLA_BR_PRIORITY]) { 1171 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]); 1172 1173 br_stp_set_bridge_priority(br, priority); 1174 } 1175 1176 if (data[IFLA_BR_VLAN_FILTERING]) { 1177 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]); 1178 1179 err = __br_vlan_filter_toggle(br, vlan_filter); 1180 if (err) 1181 return err; 1182 } 1183 1184 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1185 if (data[IFLA_BR_VLAN_PROTOCOL]) { 1186 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]); 1187 1188 err = __br_vlan_set_proto(br, vlan_proto); 1189 if (err) 1190 return err; 1191 } 1192 1193 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { 1194 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); 1195 1196 err = __br_vlan_set_default_pvid(br, defpvid, extack); 1197 if (err) 1198 return err; 1199 } 1200 1201 if (data[IFLA_BR_VLAN_STATS_ENABLED]) { 1202 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]); 1203 1204 err = br_vlan_set_stats(br, vlan_stats); 1205 if (err) 1206 return err; 1207 } 1208 1209 if (data[IFLA_BR_VLAN_STATS_PER_PORT]) { 1210 __u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]); 1211 1212 err = br_vlan_set_stats_per_port(br, per_port); 1213 if (err) 1214 return err; 1215 } 1216 #endif 1217 1218 if (data[IFLA_BR_GROUP_FWD_MASK]) { 1219 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]); 1220 1221 if (fwd_mask & BR_GROUPFWD_RESTRICTED) 1222 return -EINVAL; 1223 br->group_fwd_mask = fwd_mask; 1224 } 1225 1226 if (data[IFLA_BR_GROUP_ADDR]) { 1227 u8 new_addr[ETH_ALEN]; 1228 1229 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN) 1230 return -EINVAL; 1231 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN); 1232 if (!is_link_local_ether_addr(new_addr)) 1233 return -EINVAL; 1234 if (new_addr[5] == 1 || /* 802.3x Pause address */ 1235 new_addr[5] == 2 || /* 802.3ad Slow protocols */ 1236 new_addr[5] == 3) /* 802.1X PAE address */ 1237 return -EINVAL; 1238 spin_lock_bh(&br->lock); 1239 memcpy(br->group_addr, new_addr, sizeof(br->group_addr)); 1240 spin_unlock_bh(&br->lock); 1241 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true); 1242 br_recalculate_fwd_mask(br); 1243 } 1244 1245 if (data[IFLA_BR_FDB_FLUSH]) 1246 br_fdb_flush(br); 1247 1248 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1249 if (data[IFLA_BR_MCAST_ROUTER]) { 1250 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]); 1251 1252 err = br_multicast_set_router(br, multicast_router); 1253 if (err) 1254 return err; 1255 } 1256 1257 if (data[IFLA_BR_MCAST_SNOOPING]) { 1258 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]); 1259 1260 br_multicast_toggle(br, mcast_snooping); 1261 } 1262 1263 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) { 1264 u8 val; 1265 1266 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]); 1267 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val); 1268 } 1269 1270 if (data[IFLA_BR_MCAST_QUERIER]) { 1271 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]); 1272 1273 err = br_multicast_set_querier(br, mcast_querier); 1274 if (err) 1275 return err; 1276 } 1277 1278 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) 1279 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n", 1280 RHT_ELASTICITY); 1281 1282 if (data[IFLA_BR_MCAST_HASH_MAX]) 1283 br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]); 1284 1285 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) { 1286 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]); 1287 1288 br->multicast_last_member_count = val; 1289 } 1290 1291 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) { 1292 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]); 1293 1294 br->multicast_startup_query_count = val; 1295 } 1296 1297 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) { 1298 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]); 1299 1300 br->multicast_last_member_interval = clock_t_to_jiffies(val); 1301 } 1302 1303 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) { 1304 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]); 1305 1306 br->multicast_membership_interval = clock_t_to_jiffies(val); 1307 } 1308 1309 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) { 1310 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]); 1311 1312 br->multicast_querier_interval = clock_t_to_jiffies(val); 1313 } 1314 1315 if (data[IFLA_BR_MCAST_QUERY_INTVL]) { 1316 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]); 1317 1318 br->multicast_query_interval = clock_t_to_jiffies(val); 1319 } 1320 1321 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) { 1322 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]); 1323 1324 br->multicast_query_response_interval = clock_t_to_jiffies(val); 1325 } 1326 1327 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) { 1328 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]); 1329 1330 br->multicast_startup_query_interval = clock_t_to_jiffies(val); 1331 } 1332 1333 if (data[IFLA_BR_MCAST_STATS_ENABLED]) { 1334 __u8 mcast_stats; 1335 1336 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]); 1337 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats); 1338 } 1339 1340 if (data[IFLA_BR_MCAST_IGMP_VERSION]) { 1341 __u8 igmp_version; 1342 1343 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]); 1344 err = br_multicast_set_igmp_version(br, igmp_version); 1345 if (err) 1346 return err; 1347 } 1348 1349 #if IS_ENABLED(CONFIG_IPV6) 1350 if (data[IFLA_BR_MCAST_MLD_VERSION]) { 1351 __u8 mld_version; 1352 1353 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]); 1354 err = br_multicast_set_mld_version(br, mld_version); 1355 if (err) 1356 return err; 1357 } 1358 #endif 1359 #endif 1360 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1361 if (data[IFLA_BR_NF_CALL_IPTABLES]) { 1362 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]); 1363 1364 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val); 1365 } 1366 1367 if (data[IFLA_BR_NF_CALL_IP6TABLES]) { 1368 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]); 1369 1370 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val); 1371 } 1372 1373 if (data[IFLA_BR_NF_CALL_ARPTABLES]) { 1374 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]); 1375 1376 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val); 1377 } 1378 #endif 1379 1380 if (data[IFLA_BR_MULTI_BOOLOPT]) { 1381 struct br_boolopt_multi *bm; 1382 1383 bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]); 1384 err = br_boolopt_multi_toggle(br, bm, extack); 1385 if (err) 1386 return err; 1387 } 1388 1389 return 0; 1390 } 1391 1392 static int br_dev_newlink(struct net *src_net, struct net_device *dev, 1393 struct nlattr *tb[], struct nlattr *data[], 1394 struct netlink_ext_ack *extack) 1395 { 1396 struct net_bridge *br = netdev_priv(dev); 1397 int err; 1398 1399 err = register_netdevice(dev); 1400 if (err) 1401 return err; 1402 1403 if (tb[IFLA_ADDRESS]) { 1404 spin_lock_bh(&br->lock); 1405 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS])); 1406 spin_unlock_bh(&br->lock); 1407 } 1408 1409 err = br_changelink(dev, tb, data, extack); 1410 if (err) 1411 br_dev_delete(dev, NULL); 1412 1413 return err; 1414 } 1415 1416 static size_t br_get_size(const struct net_device *brdev) 1417 { 1418 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */ 1419 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */ 1420 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */ 1421 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */ 1422 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */ 1423 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */ 1424 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */ 1425 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1426 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */ 1427 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */ 1428 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */ 1429 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_PER_PORT */ 1430 #endif 1431 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */ 1432 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */ 1433 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */ 1434 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */ 1435 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */ 1436 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */ 1437 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */ 1438 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */ 1439 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */ 1440 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */ 1441 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */ 1442 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */ 1443 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1444 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */ 1445 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */ 1446 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */ 1447 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */ 1448 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */ 1449 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */ 1450 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */ 1451 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */ 1452 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */ 1453 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */ 1454 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */ 1455 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */ 1456 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */ 1457 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */ 1458 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */ 1459 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */ 1460 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */ 1461 #endif 1462 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1463 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */ 1464 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */ 1465 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */ 1466 #endif 1467 nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */ 1468 0; 1469 } 1470 1471 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev) 1472 { 1473 struct net_bridge *br = netdev_priv(brdev); 1474 u32 forward_delay = jiffies_to_clock_t(br->forward_delay); 1475 u32 hello_time = jiffies_to_clock_t(br->hello_time); 1476 u32 age_time = jiffies_to_clock_t(br->max_age); 1477 u32 ageing_time = jiffies_to_clock_t(br->ageing_time); 1478 u32 stp_enabled = br->stp_enabled; 1479 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]; 1480 u8 vlan_enabled = br_vlan_enabled(br->dev); 1481 struct br_boolopt_multi bm; 1482 u64 clockval; 1483 1484 clockval = br_timer_value(&br->hello_timer); 1485 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD)) 1486 return -EMSGSIZE; 1487 clockval = br_timer_value(&br->tcn_timer); 1488 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD)) 1489 return -EMSGSIZE; 1490 clockval = br_timer_value(&br->topology_change_timer); 1491 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval, 1492 IFLA_BR_PAD)) 1493 return -EMSGSIZE; 1494 clockval = br_timer_value(&br->gc_work.timer); 1495 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD)) 1496 return -EMSGSIZE; 1497 1498 br_boolopt_multi_get(br, &bm); 1499 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) || 1500 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) || 1501 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) || 1502 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) || 1503 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) || 1504 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) || 1505 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) || 1506 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) || 1507 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id), 1508 &br->bridge_id) || 1509 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id), 1510 &br->designated_root) || 1511 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) || 1512 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) || 1513 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) || 1514 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED, 1515 br->topology_change_detected) || 1516 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) || 1517 nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm)) 1518 return -EMSGSIZE; 1519 1520 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1521 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) || 1522 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) || 1523 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, 1524 br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) || 1525 nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT, 1526 br_opt_get(br, BROPT_VLAN_STATS_PER_PORT))) 1527 return -EMSGSIZE; 1528 #endif 1529 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1530 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) || 1531 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, 1532 br_opt_get(br, BROPT_MULTICAST_ENABLED)) || 1533 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR, 1534 br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) || 1535 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, 1536 br_opt_get(br, BROPT_MULTICAST_QUERIER)) || 1537 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED, 1538 br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) || 1539 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) || 1540 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) || 1541 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT, 1542 br->multicast_last_member_count) || 1543 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT, 1544 br->multicast_startup_query_count) || 1545 nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION, 1546 br->multicast_igmp_version)) 1547 return -EMSGSIZE; 1548 #if IS_ENABLED(CONFIG_IPV6) 1549 if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION, 1550 br->multicast_mld_version)) 1551 return -EMSGSIZE; 1552 #endif 1553 clockval = jiffies_to_clock_t(br->multicast_last_member_interval); 1554 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval, 1555 IFLA_BR_PAD)) 1556 return -EMSGSIZE; 1557 clockval = jiffies_to_clock_t(br->multicast_membership_interval); 1558 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval, 1559 IFLA_BR_PAD)) 1560 return -EMSGSIZE; 1561 clockval = jiffies_to_clock_t(br->multicast_querier_interval); 1562 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval, 1563 IFLA_BR_PAD)) 1564 return -EMSGSIZE; 1565 clockval = jiffies_to_clock_t(br->multicast_query_interval); 1566 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval, 1567 IFLA_BR_PAD)) 1568 return -EMSGSIZE; 1569 clockval = jiffies_to_clock_t(br->multicast_query_response_interval); 1570 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval, 1571 IFLA_BR_PAD)) 1572 return -EMSGSIZE; 1573 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval); 1574 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval, 1575 IFLA_BR_PAD)) 1576 return -EMSGSIZE; 1577 #endif 1578 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1579 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES, 1580 br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) || 1581 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES, 1582 br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) || 1583 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES, 1584 br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0)) 1585 return -EMSGSIZE; 1586 #endif 1587 1588 return 0; 1589 } 1590 1591 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr) 1592 { 1593 struct net_bridge_port *p = NULL; 1594 struct net_bridge_vlan_group *vg; 1595 struct net_bridge_vlan *v; 1596 struct net_bridge *br; 1597 int numvls = 0; 1598 1599 switch (attr) { 1600 case IFLA_STATS_LINK_XSTATS: 1601 br = netdev_priv(dev); 1602 vg = br_vlan_group(br); 1603 break; 1604 case IFLA_STATS_LINK_XSTATS_SLAVE: 1605 p = br_port_get_rtnl(dev); 1606 if (!p) 1607 return 0; 1608 br = p->br; 1609 vg = nbp_vlan_group(p); 1610 break; 1611 default: 1612 return 0; 1613 } 1614 1615 if (vg) { 1616 /* we need to count all, even placeholder entries */ 1617 list_for_each_entry(v, &vg->vlan_list, vlist) 1618 numvls++; 1619 } 1620 1621 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) + 1622 nla_total_size(sizeof(struct br_mcast_stats)) + 1623 nla_total_size(0); 1624 } 1625 1626 static int br_fill_linkxstats(struct sk_buff *skb, 1627 const struct net_device *dev, 1628 int *prividx, int attr) 1629 { 1630 struct nlattr *nla __maybe_unused; 1631 struct net_bridge_port *p = NULL; 1632 struct net_bridge_vlan_group *vg; 1633 struct net_bridge_vlan *v; 1634 struct net_bridge *br; 1635 struct nlattr *nest; 1636 int vl_idx = 0; 1637 1638 switch (attr) { 1639 case IFLA_STATS_LINK_XSTATS: 1640 br = netdev_priv(dev); 1641 vg = br_vlan_group(br); 1642 break; 1643 case IFLA_STATS_LINK_XSTATS_SLAVE: 1644 p = br_port_get_rtnl(dev); 1645 if (!p) 1646 return 0; 1647 br = p->br; 1648 vg = nbp_vlan_group(p); 1649 break; 1650 default: 1651 return -EINVAL; 1652 } 1653 1654 nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE); 1655 if (!nest) 1656 return -EMSGSIZE; 1657 1658 if (vg) { 1659 u16 pvid; 1660 1661 pvid = br_get_pvid(vg); 1662 list_for_each_entry(v, &vg->vlan_list, vlist) { 1663 struct bridge_vlan_xstats vxi; 1664 struct br_vlan_stats stats; 1665 1666 if (++vl_idx < *prividx) 1667 continue; 1668 memset(&vxi, 0, sizeof(vxi)); 1669 vxi.vid = v->vid; 1670 vxi.flags = v->flags; 1671 if (v->vid == pvid) 1672 vxi.flags |= BRIDGE_VLAN_INFO_PVID; 1673 br_vlan_get_stats(v, &stats); 1674 vxi.rx_bytes = stats.rx_bytes; 1675 vxi.rx_packets = stats.rx_packets; 1676 vxi.tx_bytes = stats.tx_bytes; 1677 vxi.tx_packets = stats.tx_packets; 1678 1679 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi)) 1680 goto nla_put_failure; 1681 } 1682 } 1683 1684 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1685 if (++vl_idx >= *prividx) { 1686 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST, 1687 sizeof(struct br_mcast_stats), 1688 BRIDGE_XSTATS_PAD); 1689 if (!nla) 1690 goto nla_put_failure; 1691 br_multicast_get_stats(br, p, nla_data(nla)); 1692 } 1693 #endif 1694 1695 if (p) { 1696 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_STP, 1697 sizeof(p->stp_xstats), 1698 BRIDGE_XSTATS_PAD); 1699 if (!nla) 1700 goto nla_put_failure; 1701 1702 spin_lock_bh(&br->lock); 1703 memcpy(nla_data(nla), &p->stp_xstats, sizeof(p->stp_xstats)); 1704 spin_unlock_bh(&br->lock); 1705 } 1706 1707 nla_nest_end(skb, nest); 1708 *prividx = 0; 1709 1710 return 0; 1711 1712 nla_put_failure: 1713 nla_nest_end(skb, nest); 1714 *prividx = vl_idx; 1715 1716 return -EMSGSIZE; 1717 } 1718 1719 static struct rtnl_af_ops br_af_ops __read_mostly = { 1720 .family = AF_BRIDGE, 1721 .get_link_af_size = br_get_link_af_size_filtered, 1722 }; 1723 1724 struct rtnl_link_ops br_link_ops __read_mostly = { 1725 .kind = "bridge", 1726 .priv_size = sizeof(struct net_bridge), 1727 .setup = br_dev_setup, 1728 .maxtype = IFLA_BR_MAX, 1729 .policy = br_policy, 1730 .validate = br_validate, 1731 .newlink = br_dev_newlink, 1732 .changelink = br_changelink, 1733 .dellink = br_dev_delete, 1734 .get_size = br_get_size, 1735 .fill_info = br_fill_info, 1736 .fill_linkxstats = br_fill_linkxstats, 1737 .get_linkxstats_size = br_get_linkxstats_size, 1738 1739 .slave_maxtype = IFLA_BRPORT_MAX, 1740 .slave_policy = br_port_policy, 1741 .slave_changelink = br_port_slave_changelink, 1742 .get_slave_size = br_port_get_slave_size, 1743 .fill_slave_info = br_port_fill_slave_info, 1744 }; 1745 1746 int __init br_netlink_init(void) 1747 { 1748 int err; 1749 1750 br_mdb_init(); 1751 br_vlan_rtnl_init(); 1752 rtnl_af_register(&br_af_ops); 1753 1754 err = rtnl_link_register(&br_link_ops); 1755 if (err) 1756 goto out_af; 1757 1758 return 0; 1759 1760 out_af: 1761 rtnl_af_unregister(&br_af_ops); 1762 br_mdb_uninit(); 1763 return err; 1764 } 1765 1766 void br_netlink_fini(void) 1767 { 1768 br_mdb_uninit(); 1769 br_vlan_rtnl_uninit(); 1770 rtnl_af_unregister(&br_af_ops); 1771 rtnl_link_unregister(&br_link_ops); 1772 } 1773