1 /* 2 * Bridge netlink control interface 3 * 4 * Authors: 5 * Stephen Hemminger <shemminger@osdl.org> 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 */ 12 13 #include <linux/kernel.h> 14 #include <linux/slab.h> 15 #include <linux/etherdevice.h> 16 #include <net/rtnetlink.h> 17 #include <net/net_namespace.h> 18 #include <net/sock.h> 19 #include <uapi/linux/if_bridge.h> 20 21 #include "br_private.h" 22 #include "br_private_stp.h" 23 24 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg, 25 u32 filter_mask) 26 { 27 struct net_bridge_vlan *v; 28 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0; 29 u16 flags, pvid; 30 int num_vlans = 0; 31 32 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) 33 return 0; 34 35 pvid = br_get_pvid(vg); 36 /* Count number of vlan infos */ 37 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 38 flags = 0; 39 /* only a context, bridge vlan not activated */ 40 if (!br_vlan_should_use(v)) 41 continue; 42 if (v->vid == pvid) 43 flags |= BRIDGE_VLAN_INFO_PVID; 44 45 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 46 flags |= BRIDGE_VLAN_INFO_UNTAGGED; 47 48 if (vid_range_start == 0) { 49 goto initvars; 50 } else if ((v->vid - vid_range_end) == 1 && 51 flags == vid_range_flags) { 52 vid_range_end = v->vid; 53 continue; 54 } else { 55 if ((vid_range_end - vid_range_start) > 0) 56 num_vlans += 2; 57 else 58 num_vlans += 1; 59 } 60 initvars: 61 vid_range_start = v->vid; 62 vid_range_end = v->vid; 63 vid_range_flags = flags; 64 } 65 66 if (vid_range_start != 0) { 67 if ((vid_range_end - vid_range_start) > 0) 68 num_vlans += 2; 69 else 70 num_vlans += 1; 71 } 72 73 return num_vlans; 74 } 75 76 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg, 77 u32 filter_mask) 78 { 79 int num_vlans; 80 81 if (!vg) 82 return 0; 83 84 if (filter_mask & RTEXT_FILTER_BRVLAN) 85 return vg->num_vlans; 86 87 rcu_read_lock(); 88 num_vlans = __get_num_vlan_infos(vg, filter_mask); 89 rcu_read_unlock(); 90 91 return num_vlans; 92 } 93 94 static size_t br_get_link_af_size_filtered(const struct net_device *dev, 95 u32 filter_mask) 96 { 97 struct net_bridge_vlan_group *vg = NULL; 98 struct net_bridge_port *p; 99 struct net_bridge *br; 100 int num_vlan_infos; 101 102 rcu_read_lock(); 103 if (br_port_exists(dev)) { 104 p = br_port_get_rcu(dev); 105 vg = nbp_vlan_group_rcu(p); 106 } else if (dev->priv_flags & IFF_EBRIDGE) { 107 br = netdev_priv(dev); 108 vg = br_vlan_group_rcu(br); 109 } 110 num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask); 111 rcu_read_unlock(); 112 113 /* Each VLAN is returned in bridge_vlan_info along with flags */ 114 return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info)); 115 } 116 117 static inline size_t br_port_info_size(void) 118 { 119 return nla_total_size(1) /* IFLA_BRPORT_STATE */ 120 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */ 121 + nla_total_size(4) /* IFLA_BRPORT_COST */ 122 + nla_total_size(1) /* IFLA_BRPORT_MODE */ 123 + nla_total_size(1) /* IFLA_BRPORT_GUARD */ 124 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */ 125 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */ 126 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */ 127 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */ 128 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */ 129 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */ 130 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */ 131 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */ 132 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */ 133 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */ 134 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */ 135 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */ 136 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */ 137 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */ 138 + nla_total_size(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */ 139 + nla_total_size(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */ 140 + nla_total_size(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */ 141 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 142 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */ 143 #endif 144 + 0; 145 } 146 147 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask) 148 { 149 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 150 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 151 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 152 + nla_total_size(4) /* IFLA_MASTER */ 153 + nla_total_size(4) /* IFLA_MTU */ 154 + nla_total_size(4) /* IFLA_LINK */ 155 + nla_total_size(1) /* IFLA_OPERSTATE */ 156 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */ 157 + nla_total_size(br_get_link_af_size_filtered(dev, 158 filter_mask)); /* IFLA_AF_SPEC */ 159 } 160 161 static int br_port_fill_attrs(struct sk_buff *skb, 162 const struct net_bridge_port *p) 163 { 164 u8 mode = !!(p->flags & BR_HAIRPIN_MODE); 165 u64 timerval; 166 167 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) || 168 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) || 169 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) || 170 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) || 171 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) || 172 nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) || 173 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) || 174 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) || 175 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) || 176 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) || 177 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI, 178 !!(p->flags & BR_PROXYARP_WIFI)) || 179 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id), 180 &p->designated_root) || 181 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id), 182 &p->designated_bridge) || 183 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) || 184 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) || 185 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) || 186 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) || 187 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK, 188 p->topology_change_ack) || 189 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending)) 190 return -EMSGSIZE; 191 192 timerval = br_timer_value(&p->message_age_timer); 193 if (nla_put_u64(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval)) 194 return -EMSGSIZE; 195 timerval = br_timer_value(&p->forward_delay_timer); 196 if (nla_put_u64(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval)) 197 return -EMSGSIZE; 198 timerval = br_timer_value(&p->hold_timer); 199 if (nla_put_u64(skb, IFLA_BRPORT_HOLD_TIMER, timerval)) 200 return -EMSGSIZE; 201 202 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 203 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER, 204 p->multicast_router)) 205 return -EMSGSIZE; 206 #endif 207 208 return 0; 209 } 210 211 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start, 212 u16 vid_end, u16 flags) 213 { 214 struct bridge_vlan_info vinfo; 215 216 if ((vid_end - vid_start) > 0) { 217 /* add range to skb */ 218 vinfo.vid = vid_start; 219 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN; 220 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 221 sizeof(vinfo), &vinfo)) 222 goto nla_put_failure; 223 224 vinfo.vid = vid_end; 225 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END; 226 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 227 sizeof(vinfo), &vinfo)) 228 goto nla_put_failure; 229 } else { 230 vinfo.vid = vid_start; 231 vinfo.flags = flags; 232 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 233 sizeof(vinfo), &vinfo)) 234 goto nla_put_failure; 235 } 236 237 return 0; 238 239 nla_put_failure: 240 return -EMSGSIZE; 241 } 242 243 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb, 244 struct net_bridge_vlan_group *vg) 245 { 246 struct net_bridge_vlan *v; 247 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0; 248 u16 flags, pvid; 249 int err = 0; 250 251 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan 252 * and mark vlan info with begin and end flags 253 * if vlaninfo represents a range 254 */ 255 pvid = br_get_pvid(vg); 256 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 257 flags = 0; 258 if (!br_vlan_should_use(v)) 259 continue; 260 if (v->vid == pvid) 261 flags |= BRIDGE_VLAN_INFO_PVID; 262 263 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 264 flags |= BRIDGE_VLAN_INFO_UNTAGGED; 265 266 if (vid_range_start == 0) { 267 goto initvars; 268 } else if ((v->vid - vid_range_end) == 1 && 269 flags == vid_range_flags) { 270 vid_range_end = v->vid; 271 continue; 272 } else { 273 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 274 vid_range_end, 275 vid_range_flags); 276 if (err) 277 return err; 278 } 279 280 initvars: 281 vid_range_start = v->vid; 282 vid_range_end = v->vid; 283 vid_range_flags = flags; 284 } 285 286 if (vid_range_start != 0) { 287 /* Call it once more to send any left over vlans */ 288 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 289 vid_range_end, 290 vid_range_flags); 291 if (err) 292 return err; 293 } 294 295 return 0; 296 } 297 298 static int br_fill_ifvlaninfo(struct sk_buff *skb, 299 struct net_bridge_vlan_group *vg) 300 { 301 struct bridge_vlan_info vinfo; 302 struct net_bridge_vlan *v; 303 u16 pvid; 304 305 pvid = br_get_pvid(vg); 306 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 307 if (!br_vlan_should_use(v)) 308 continue; 309 310 vinfo.vid = v->vid; 311 vinfo.flags = 0; 312 if (v->vid == pvid) 313 vinfo.flags |= BRIDGE_VLAN_INFO_PVID; 314 315 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 316 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 317 318 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 319 sizeof(vinfo), &vinfo)) 320 goto nla_put_failure; 321 } 322 323 return 0; 324 325 nla_put_failure: 326 return -EMSGSIZE; 327 } 328 329 /* 330 * Create one netlink message for one interface 331 * Contains port and master info as well as carrier and bridge state. 332 */ 333 static int br_fill_ifinfo(struct sk_buff *skb, 334 struct net_bridge_port *port, 335 u32 pid, u32 seq, int event, unsigned int flags, 336 u32 filter_mask, const struct net_device *dev) 337 { 338 struct net_bridge *br; 339 struct ifinfomsg *hdr; 340 struct nlmsghdr *nlh; 341 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 342 343 if (port) 344 br = port->br; 345 else 346 br = netdev_priv(dev); 347 348 br_debug(br, "br_fill_info event %d port %s master %s\n", 349 event, dev->name, br->dev->name); 350 351 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); 352 if (nlh == NULL) 353 return -EMSGSIZE; 354 355 hdr = nlmsg_data(nlh); 356 hdr->ifi_family = AF_BRIDGE; 357 hdr->__ifi_pad = 0; 358 hdr->ifi_type = dev->type; 359 hdr->ifi_index = dev->ifindex; 360 hdr->ifi_flags = dev_get_flags(dev); 361 hdr->ifi_change = 0; 362 363 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 364 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) || 365 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 366 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 367 (dev->addr_len && 368 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 369 (dev->ifindex != dev_get_iflink(dev) && 370 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 371 goto nla_put_failure; 372 373 if (event == RTM_NEWLINK && port) { 374 struct nlattr *nest 375 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 376 377 if (nest == NULL || br_port_fill_attrs(skb, port) < 0) 378 goto nla_put_failure; 379 nla_nest_end(skb, nest); 380 } 381 382 /* Check if the VID information is requested */ 383 if ((filter_mask & RTEXT_FILTER_BRVLAN) || 384 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { 385 struct net_bridge_vlan_group *vg; 386 struct nlattr *af; 387 int err; 388 389 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */ 390 rcu_read_lock(); 391 if (port) 392 vg = nbp_vlan_group_rcu(port); 393 else 394 vg = br_vlan_group_rcu(br); 395 396 if (!vg || !vg->num_vlans) { 397 rcu_read_unlock(); 398 goto done; 399 } 400 af = nla_nest_start(skb, IFLA_AF_SPEC); 401 if (!af) { 402 rcu_read_unlock(); 403 goto nla_put_failure; 404 } 405 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) 406 err = br_fill_ifvlaninfo_compressed(skb, vg); 407 else 408 err = br_fill_ifvlaninfo(skb, vg); 409 rcu_read_unlock(); 410 if (err) 411 goto nla_put_failure; 412 nla_nest_end(skb, af); 413 } 414 415 done: 416 nlmsg_end(skb, nlh); 417 return 0; 418 419 nla_put_failure: 420 nlmsg_cancel(skb, nlh); 421 return -EMSGSIZE; 422 } 423 424 /* 425 * Notify listeners of a change in port information 426 */ 427 void br_ifinfo_notify(int event, struct net_bridge_port *port) 428 { 429 struct net *net; 430 struct sk_buff *skb; 431 int err = -ENOBUFS; 432 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED; 433 434 if (!port) 435 return; 436 437 net = dev_net(port->dev); 438 br_debug(port->br, "port %u(%s) event %d\n", 439 (unsigned int)port->port_no, port->dev->name, event); 440 441 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC); 442 if (skb == NULL) 443 goto errout; 444 445 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev); 446 if (err < 0) { 447 /* -EMSGSIZE implies BUG in br_nlmsg_size() */ 448 WARN_ON(err == -EMSGSIZE); 449 kfree_skb(skb); 450 goto errout; 451 } 452 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 453 return; 454 errout: 455 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 456 } 457 458 459 /* 460 * Dump information about all ports, in response to GETLINK 461 */ 462 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 463 struct net_device *dev, u32 filter_mask, int nlflags) 464 { 465 struct net_bridge_port *port = br_port_get_rtnl(dev); 466 467 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) && 468 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) 469 return 0; 470 471 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags, 472 filter_mask, dev); 473 } 474 475 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p, 476 int cmd, struct bridge_vlan_info *vinfo) 477 { 478 int err = 0; 479 480 switch (cmd) { 481 case RTM_SETLINK: 482 if (p) { 483 /* if the MASTER flag is set this will act on the global 484 * per-VLAN entry as well 485 */ 486 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags); 487 if (err) 488 break; 489 } else { 490 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY; 491 err = br_vlan_add(br, vinfo->vid, vinfo->flags); 492 } 493 break; 494 495 case RTM_DELLINK: 496 if (p) { 497 nbp_vlan_delete(p, vinfo->vid); 498 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) 499 br_vlan_delete(p->br, vinfo->vid); 500 } else { 501 br_vlan_delete(br, vinfo->vid); 502 } 503 break; 504 } 505 506 return err; 507 } 508 509 static int br_afspec(struct net_bridge *br, 510 struct net_bridge_port *p, 511 struct nlattr *af_spec, 512 int cmd) 513 { 514 struct bridge_vlan_info *vinfo_start = NULL; 515 struct bridge_vlan_info *vinfo = NULL; 516 struct nlattr *attr; 517 int err = 0; 518 int rem; 519 520 nla_for_each_nested(attr, af_spec, rem) { 521 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO) 522 continue; 523 if (nla_len(attr) != sizeof(struct bridge_vlan_info)) 524 return -EINVAL; 525 vinfo = nla_data(attr); 526 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK) 527 return -EINVAL; 528 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 529 if (vinfo_start) 530 return -EINVAL; 531 vinfo_start = vinfo; 532 /* don't allow range of pvids */ 533 if (vinfo_start->flags & BRIDGE_VLAN_INFO_PVID) 534 return -EINVAL; 535 continue; 536 } 537 538 if (vinfo_start) { 539 struct bridge_vlan_info tmp_vinfo; 540 int v; 541 542 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END)) 543 return -EINVAL; 544 545 if (vinfo->vid <= vinfo_start->vid) 546 return -EINVAL; 547 548 memcpy(&tmp_vinfo, vinfo_start, 549 sizeof(struct bridge_vlan_info)); 550 551 for (v = vinfo_start->vid; v <= vinfo->vid; v++) { 552 tmp_vinfo.vid = v; 553 err = br_vlan_info(br, p, cmd, &tmp_vinfo); 554 if (err) 555 break; 556 } 557 vinfo_start = NULL; 558 } else { 559 err = br_vlan_info(br, p, cmd, vinfo); 560 } 561 if (err) 562 break; 563 } 564 565 return err; 566 } 567 568 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = { 569 [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, 570 [IFLA_BRPORT_COST] = { .type = NLA_U32 }, 571 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, 572 [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, 573 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, 574 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, 575 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 }, 576 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, 577 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, 578 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 }, 579 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 }, 580 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 }, 581 }; 582 583 /* Change the state of the port and notify spanning tree */ 584 static int br_set_port_state(struct net_bridge_port *p, u8 state) 585 { 586 if (state > BR_STATE_BLOCKING) 587 return -EINVAL; 588 589 /* if kernel STP is running, don't allow changes */ 590 if (p->br->stp_enabled == BR_KERNEL_STP) 591 return -EBUSY; 592 593 /* if device is not up, change is not allowed 594 * if link is not present, only allowable state is disabled 595 */ 596 if (!netif_running(p->dev) || 597 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED)) 598 return -ENETDOWN; 599 600 br_set_state(p, state); 601 br_port_state_selection(p->br); 602 return 0; 603 } 604 605 /* Set/clear or port flags based on attribute */ 606 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[], 607 int attrtype, unsigned long mask) 608 { 609 if (tb[attrtype]) { 610 u8 flag = nla_get_u8(tb[attrtype]); 611 if (flag) 612 p->flags |= mask; 613 else 614 p->flags &= ~mask; 615 } 616 } 617 618 /* Process bridge protocol info on port */ 619 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[]) 620 { 621 int err; 622 unsigned long old_flags = p->flags; 623 624 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE); 625 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD); 626 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE); 627 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK); 628 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING); 629 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD); 630 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP); 631 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI); 632 633 if (tb[IFLA_BRPORT_COST]) { 634 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST])); 635 if (err) 636 return err; 637 } 638 639 if (tb[IFLA_BRPORT_PRIORITY]) { 640 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY])); 641 if (err) 642 return err; 643 } 644 645 if (tb[IFLA_BRPORT_STATE]) { 646 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE])); 647 if (err) 648 return err; 649 } 650 651 if (tb[IFLA_BRPORT_FLUSH]) 652 br_fdb_delete_by_port(p->br, p, 0, 0); 653 654 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 655 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) { 656 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]); 657 658 err = br_multicast_set_port_router(p, mcast_router); 659 if (err) 660 return err; 661 } 662 #endif 663 br_port_flags_change(p, old_flags ^ p->flags); 664 return 0; 665 } 666 667 /* Change state and parameters on port. */ 668 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 669 { 670 struct nlattr *protinfo; 671 struct nlattr *afspec; 672 struct net_bridge_port *p; 673 struct nlattr *tb[IFLA_BRPORT_MAX + 1]; 674 int err = 0; 675 676 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO); 677 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 678 if (!protinfo && !afspec) 679 return 0; 680 681 p = br_port_get_rtnl(dev); 682 /* We want to accept dev as bridge itself if the AF_SPEC 683 * is set to see if someone is setting vlan info on the bridge 684 */ 685 if (!p && !afspec) 686 return -EINVAL; 687 688 if (p && protinfo) { 689 if (protinfo->nla_type & NLA_F_NESTED) { 690 err = nla_parse_nested(tb, IFLA_BRPORT_MAX, 691 protinfo, br_port_policy); 692 if (err) 693 return err; 694 695 spin_lock_bh(&p->br->lock); 696 err = br_setport(p, tb); 697 spin_unlock_bh(&p->br->lock); 698 } else { 699 /* Binary compatibility with old RSTP */ 700 if (nla_len(protinfo) < sizeof(u8)) 701 return -EINVAL; 702 703 spin_lock_bh(&p->br->lock); 704 err = br_set_port_state(p, nla_get_u8(protinfo)); 705 spin_unlock_bh(&p->br->lock); 706 } 707 if (err) 708 goto out; 709 } 710 711 if (afspec) { 712 err = br_afspec((struct net_bridge *)netdev_priv(dev), p, 713 afspec, RTM_SETLINK); 714 } 715 716 if (err == 0) 717 br_ifinfo_notify(RTM_NEWLINK, p); 718 out: 719 return err; 720 } 721 722 /* Delete port information */ 723 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 724 { 725 struct nlattr *afspec; 726 struct net_bridge_port *p; 727 int err = 0; 728 729 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 730 if (!afspec) 731 return 0; 732 733 p = br_port_get_rtnl(dev); 734 /* We want to accept dev as bridge itself as well */ 735 if (!p && !(dev->priv_flags & IFF_EBRIDGE)) 736 return -EINVAL; 737 738 err = br_afspec((struct net_bridge *)netdev_priv(dev), p, 739 afspec, RTM_DELLINK); 740 if (err == 0) 741 /* Send RTM_NEWLINK because userspace 742 * expects RTM_NEWLINK for vlan dels 743 */ 744 br_ifinfo_notify(RTM_NEWLINK, p); 745 746 return err; 747 } 748 static int br_validate(struct nlattr *tb[], struct nlattr *data[]) 749 { 750 if (tb[IFLA_ADDRESS]) { 751 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 752 return -EINVAL; 753 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 754 return -EADDRNOTAVAIL; 755 } 756 757 if (!data) 758 return 0; 759 760 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 761 if (data[IFLA_BR_VLAN_PROTOCOL]) { 762 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) { 763 case htons(ETH_P_8021Q): 764 case htons(ETH_P_8021AD): 765 break; 766 default: 767 return -EPROTONOSUPPORT; 768 } 769 } 770 #endif 771 772 return 0; 773 } 774 775 static int br_dev_newlink(struct net *src_net, struct net_device *dev, 776 struct nlattr *tb[], struct nlattr *data[]) 777 { 778 struct net_bridge *br = netdev_priv(dev); 779 780 if (tb[IFLA_ADDRESS]) { 781 spin_lock_bh(&br->lock); 782 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS])); 783 spin_unlock_bh(&br->lock); 784 } 785 786 return register_netdevice(dev); 787 } 788 789 static int br_port_slave_changelink(struct net_device *brdev, 790 struct net_device *dev, 791 struct nlattr *tb[], 792 struct nlattr *data[]) 793 { 794 struct net_bridge *br = netdev_priv(brdev); 795 int ret; 796 797 if (!data) 798 return 0; 799 800 spin_lock_bh(&br->lock); 801 ret = br_setport(br_port_get_rtnl(dev), data); 802 spin_unlock_bh(&br->lock); 803 804 return ret; 805 } 806 807 static int br_port_fill_slave_info(struct sk_buff *skb, 808 const struct net_device *brdev, 809 const struct net_device *dev) 810 { 811 return br_port_fill_attrs(skb, br_port_get_rtnl(dev)); 812 } 813 814 static size_t br_port_get_slave_size(const struct net_device *brdev, 815 const struct net_device *dev) 816 { 817 return br_port_info_size(); 818 } 819 820 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = { 821 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 }, 822 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 }, 823 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 }, 824 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 }, 825 [IFLA_BR_STP_STATE] = { .type = NLA_U32 }, 826 [IFLA_BR_PRIORITY] = { .type = NLA_U16 }, 827 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 }, 828 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 }, 829 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 }, 830 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY, 831 .len = ETH_ALEN }, 832 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 }, 833 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 }, 834 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 }, 835 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 }, 836 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 }, 837 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 }, 838 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 }, 839 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 }, 840 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 }, 841 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 }, 842 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 }, 843 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 }, 844 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 }, 845 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 }, 846 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 }, 847 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 }, 848 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 }, 849 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 }, 850 }; 851 852 static int br_changelink(struct net_device *brdev, struct nlattr *tb[], 853 struct nlattr *data[]) 854 { 855 struct net_bridge *br = netdev_priv(brdev); 856 int err; 857 858 if (!data) 859 return 0; 860 861 if (data[IFLA_BR_FORWARD_DELAY]) { 862 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY])); 863 if (err) 864 return err; 865 } 866 867 if (data[IFLA_BR_HELLO_TIME]) { 868 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME])); 869 if (err) 870 return err; 871 } 872 873 if (data[IFLA_BR_MAX_AGE]) { 874 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE])); 875 if (err) 876 return err; 877 } 878 879 if (data[IFLA_BR_AGEING_TIME]) { 880 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME])); 881 if (err) 882 return err; 883 } 884 885 if (data[IFLA_BR_STP_STATE]) { 886 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]); 887 888 br_stp_set_enabled(br, stp_enabled); 889 } 890 891 if (data[IFLA_BR_PRIORITY]) { 892 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]); 893 894 br_stp_set_bridge_priority(br, priority); 895 } 896 897 if (data[IFLA_BR_VLAN_FILTERING]) { 898 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]); 899 900 err = __br_vlan_filter_toggle(br, vlan_filter); 901 if (err) 902 return err; 903 } 904 905 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 906 if (data[IFLA_BR_VLAN_PROTOCOL]) { 907 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]); 908 909 err = __br_vlan_set_proto(br, vlan_proto); 910 if (err) 911 return err; 912 } 913 914 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { 915 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); 916 917 err = __br_vlan_set_default_pvid(br, defpvid); 918 if (err) 919 return err; 920 } 921 #endif 922 923 if (data[IFLA_BR_GROUP_FWD_MASK]) { 924 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]); 925 926 if (fwd_mask & BR_GROUPFWD_RESTRICTED) 927 return -EINVAL; 928 br->group_fwd_mask = fwd_mask; 929 } 930 931 if (data[IFLA_BR_GROUP_ADDR]) { 932 u8 new_addr[ETH_ALEN]; 933 934 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN) 935 return -EINVAL; 936 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN); 937 if (!is_link_local_ether_addr(new_addr)) 938 return -EINVAL; 939 if (new_addr[5] == 1 || /* 802.3x Pause address */ 940 new_addr[5] == 2 || /* 802.3ad Slow protocols */ 941 new_addr[5] == 3) /* 802.1X PAE address */ 942 return -EINVAL; 943 spin_lock_bh(&br->lock); 944 memcpy(br->group_addr, new_addr, sizeof(br->group_addr)); 945 spin_unlock_bh(&br->lock); 946 br->group_addr_set = true; 947 br_recalculate_fwd_mask(br); 948 } 949 950 if (data[IFLA_BR_FDB_FLUSH]) 951 br_fdb_flush(br); 952 953 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 954 if (data[IFLA_BR_MCAST_ROUTER]) { 955 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]); 956 957 err = br_multicast_set_router(br, multicast_router); 958 if (err) 959 return err; 960 } 961 962 if (data[IFLA_BR_MCAST_SNOOPING]) { 963 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]); 964 965 err = br_multicast_toggle(br, mcast_snooping); 966 if (err) 967 return err; 968 } 969 970 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) { 971 u8 val; 972 973 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]); 974 br->multicast_query_use_ifaddr = !!val; 975 } 976 977 if (data[IFLA_BR_MCAST_QUERIER]) { 978 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]); 979 980 err = br_multicast_set_querier(br, mcast_querier); 981 if (err) 982 return err; 983 } 984 985 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) { 986 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]); 987 988 br->hash_elasticity = val; 989 } 990 991 if (data[IFLA_BR_MCAST_HASH_MAX]) { 992 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]); 993 994 err = br_multicast_set_hash_max(br, hash_max); 995 if (err) 996 return err; 997 } 998 999 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) { 1000 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]); 1001 1002 br->multicast_last_member_count = val; 1003 } 1004 1005 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) { 1006 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]); 1007 1008 br->multicast_startup_query_count = val; 1009 } 1010 1011 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) { 1012 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]); 1013 1014 br->multicast_last_member_interval = clock_t_to_jiffies(val); 1015 } 1016 1017 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) { 1018 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]); 1019 1020 br->multicast_membership_interval = clock_t_to_jiffies(val); 1021 } 1022 1023 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) { 1024 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]); 1025 1026 br->multicast_querier_interval = clock_t_to_jiffies(val); 1027 } 1028 1029 if (data[IFLA_BR_MCAST_QUERY_INTVL]) { 1030 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]); 1031 1032 br->multicast_query_interval = clock_t_to_jiffies(val); 1033 } 1034 1035 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) { 1036 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]); 1037 1038 br->multicast_query_response_interval = clock_t_to_jiffies(val); 1039 } 1040 1041 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) { 1042 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]); 1043 1044 br->multicast_startup_query_interval = clock_t_to_jiffies(val); 1045 } 1046 #endif 1047 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1048 if (data[IFLA_BR_NF_CALL_IPTABLES]) { 1049 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]); 1050 1051 br->nf_call_iptables = val ? true : false; 1052 } 1053 1054 if (data[IFLA_BR_NF_CALL_IP6TABLES]) { 1055 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]); 1056 1057 br->nf_call_ip6tables = val ? true : false; 1058 } 1059 1060 if (data[IFLA_BR_NF_CALL_ARPTABLES]) { 1061 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]); 1062 1063 br->nf_call_arptables = val ? true : false; 1064 } 1065 #endif 1066 1067 return 0; 1068 } 1069 1070 static size_t br_get_size(const struct net_device *brdev) 1071 { 1072 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */ 1073 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */ 1074 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */ 1075 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */ 1076 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */ 1077 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */ 1078 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */ 1079 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1080 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */ 1081 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */ 1082 #endif 1083 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */ 1084 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */ 1085 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */ 1086 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */ 1087 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */ 1088 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */ 1089 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */ 1090 nla_total_size(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */ 1091 nla_total_size(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */ 1092 nla_total_size(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */ 1093 nla_total_size(sizeof(u64)) + /* IFLA_BR_GC_TIMER */ 1094 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */ 1095 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1096 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */ 1097 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */ 1098 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */ 1099 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */ 1100 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */ 1101 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */ 1102 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */ 1103 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */ 1104 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */ 1105 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */ 1106 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */ 1107 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */ 1108 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */ 1109 nla_total_size(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */ 1110 #endif 1111 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1112 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */ 1113 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */ 1114 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */ 1115 #endif 1116 0; 1117 } 1118 1119 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev) 1120 { 1121 struct net_bridge *br = netdev_priv(brdev); 1122 u32 forward_delay = jiffies_to_clock_t(br->forward_delay); 1123 u32 hello_time = jiffies_to_clock_t(br->hello_time); 1124 u32 age_time = jiffies_to_clock_t(br->max_age); 1125 u32 ageing_time = jiffies_to_clock_t(br->ageing_time); 1126 u32 stp_enabled = br->stp_enabled; 1127 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]; 1128 u8 vlan_enabled = br_vlan_enabled(br); 1129 u64 clockval; 1130 1131 clockval = br_timer_value(&br->hello_timer); 1132 if (nla_put_u64(skb, IFLA_BR_HELLO_TIMER, clockval)) 1133 return -EMSGSIZE; 1134 clockval = br_timer_value(&br->tcn_timer); 1135 if (nla_put_u64(skb, IFLA_BR_TCN_TIMER, clockval)) 1136 return -EMSGSIZE; 1137 clockval = br_timer_value(&br->topology_change_timer); 1138 if (nla_put_u64(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval)) 1139 return -EMSGSIZE; 1140 clockval = br_timer_value(&br->gc_timer); 1141 if (nla_put_u64(skb, IFLA_BR_GC_TIMER, clockval)) 1142 return -EMSGSIZE; 1143 1144 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) || 1145 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) || 1146 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) || 1147 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) || 1148 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) || 1149 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) || 1150 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) || 1151 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) || 1152 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id), 1153 &br->bridge_id) || 1154 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id), 1155 &br->designated_root) || 1156 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) || 1157 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) || 1158 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) || 1159 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED, 1160 br->topology_change_detected) || 1161 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr)) 1162 return -EMSGSIZE; 1163 1164 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1165 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) || 1166 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid)) 1167 return -EMSGSIZE; 1168 #endif 1169 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1170 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) || 1171 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) || 1172 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR, 1173 br->multicast_query_use_ifaddr) || 1174 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) || 1175 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, 1176 br->hash_elasticity) || 1177 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) || 1178 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT, 1179 br->multicast_last_member_count) || 1180 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT, 1181 br->multicast_startup_query_count)) 1182 return -EMSGSIZE; 1183 1184 clockval = jiffies_to_clock_t(br->multicast_last_member_interval); 1185 if (nla_put_u64(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval)) 1186 return -EMSGSIZE; 1187 clockval = jiffies_to_clock_t(br->multicast_membership_interval); 1188 if (nla_put_u64(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval)) 1189 return -EMSGSIZE; 1190 clockval = jiffies_to_clock_t(br->multicast_querier_interval); 1191 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval)) 1192 return -EMSGSIZE; 1193 clockval = jiffies_to_clock_t(br->multicast_query_interval); 1194 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval)) 1195 return -EMSGSIZE; 1196 clockval = jiffies_to_clock_t(br->multicast_query_response_interval); 1197 if (nla_put_u64(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval)) 1198 return -EMSGSIZE; 1199 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval); 1200 if (nla_put_u64(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval)) 1201 return -EMSGSIZE; 1202 #endif 1203 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1204 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES, 1205 br->nf_call_iptables ? 1 : 0) || 1206 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES, 1207 br->nf_call_ip6tables ? 1 : 0) || 1208 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES, 1209 br->nf_call_arptables ? 1 : 0)) 1210 return -EMSGSIZE; 1211 #endif 1212 1213 return 0; 1214 } 1215 1216 1217 static struct rtnl_af_ops br_af_ops __read_mostly = { 1218 .family = AF_BRIDGE, 1219 .get_link_af_size = br_get_link_af_size_filtered, 1220 }; 1221 1222 struct rtnl_link_ops br_link_ops __read_mostly = { 1223 .kind = "bridge", 1224 .priv_size = sizeof(struct net_bridge), 1225 .setup = br_dev_setup, 1226 .maxtype = IFLA_BR_MAX, 1227 .policy = br_policy, 1228 .validate = br_validate, 1229 .newlink = br_dev_newlink, 1230 .changelink = br_changelink, 1231 .dellink = br_dev_delete, 1232 .get_size = br_get_size, 1233 .fill_info = br_fill_info, 1234 1235 .slave_maxtype = IFLA_BRPORT_MAX, 1236 .slave_policy = br_port_policy, 1237 .slave_changelink = br_port_slave_changelink, 1238 .get_slave_size = br_port_get_slave_size, 1239 .fill_slave_info = br_port_fill_slave_info, 1240 }; 1241 1242 int __init br_netlink_init(void) 1243 { 1244 int err; 1245 1246 br_mdb_init(); 1247 rtnl_af_register(&br_af_ops); 1248 1249 err = rtnl_link_register(&br_link_ops); 1250 if (err) 1251 goto out_af; 1252 1253 return 0; 1254 1255 out_af: 1256 rtnl_af_unregister(&br_af_ops); 1257 br_mdb_uninit(); 1258 return err; 1259 } 1260 1261 void br_netlink_fini(void) 1262 { 1263 br_mdb_uninit(); 1264 rtnl_af_unregister(&br_af_ops); 1265 rtnl_link_unregister(&br_link_ops); 1266 } 1267