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_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */ 139 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */ 140 + nla_total_size_64bit(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, 173 !!(p->flags & BR_ROOT_BLOCK)) || 174 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, 175 !!(p->flags & BR_MULTICAST_FAST_LEAVE)) || 176 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) || 177 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, 178 !!(p->flags & BR_FLOOD)) || 179 nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD, 180 !!(p->flags & BR_MCAST_FLOOD)) || 181 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) || 182 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI, 183 !!(p->flags & BR_PROXYARP_WIFI)) || 184 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id), 185 &p->designated_root) || 186 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id), 187 &p->designated_bridge) || 188 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) || 189 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) || 190 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) || 191 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) || 192 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK, 193 p->topology_change_ack) || 194 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending)) 195 return -EMSGSIZE; 196 197 timerval = br_timer_value(&p->message_age_timer); 198 if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval, 199 IFLA_BRPORT_PAD)) 200 return -EMSGSIZE; 201 timerval = br_timer_value(&p->forward_delay_timer); 202 if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval, 203 IFLA_BRPORT_PAD)) 204 return -EMSGSIZE; 205 timerval = br_timer_value(&p->hold_timer); 206 if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval, 207 IFLA_BRPORT_PAD)) 208 return -EMSGSIZE; 209 210 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 211 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER, 212 p->multicast_router)) 213 return -EMSGSIZE; 214 #endif 215 216 return 0; 217 } 218 219 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start, 220 u16 vid_end, u16 flags) 221 { 222 struct bridge_vlan_info vinfo; 223 224 if ((vid_end - vid_start) > 0) { 225 /* add range to skb */ 226 vinfo.vid = vid_start; 227 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN; 228 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 229 sizeof(vinfo), &vinfo)) 230 goto nla_put_failure; 231 232 vinfo.vid = vid_end; 233 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END; 234 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 235 sizeof(vinfo), &vinfo)) 236 goto nla_put_failure; 237 } else { 238 vinfo.vid = vid_start; 239 vinfo.flags = flags; 240 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 241 sizeof(vinfo), &vinfo)) 242 goto nla_put_failure; 243 } 244 245 return 0; 246 247 nla_put_failure: 248 return -EMSGSIZE; 249 } 250 251 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb, 252 struct net_bridge_vlan_group *vg) 253 { 254 struct net_bridge_vlan *v; 255 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0; 256 u16 flags, pvid; 257 int err = 0; 258 259 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan 260 * and mark vlan info with begin and end flags 261 * if vlaninfo represents a range 262 */ 263 pvid = br_get_pvid(vg); 264 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 265 flags = 0; 266 if (!br_vlan_should_use(v)) 267 continue; 268 if (v->vid == pvid) 269 flags |= BRIDGE_VLAN_INFO_PVID; 270 271 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 272 flags |= BRIDGE_VLAN_INFO_UNTAGGED; 273 274 if (vid_range_start == 0) { 275 goto initvars; 276 } else if ((v->vid - vid_range_end) == 1 && 277 flags == vid_range_flags) { 278 vid_range_end = v->vid; 279 continue; 280 } else { 281 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 282 vid_range_end, 283 vid_range_flags); 284 if (err) 285 return err; 286 } 287 288 initvars: 289 vid_range_start = v->vid; 290 vid_range_end = v->vid; 291 vid_range_flags = flags; 292 } 293 294 if (vid_range_start != 0) { 295 /* Call it once more to send any left over vlans */ 296 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 297 vid_range_end, 298 vid_range_flags); 299 if (err) 300 return err; 301 } 302 303 return 0; 304 } 305 306 static int br_fill_ifvlaninfo(struct sk_buff *skb, 307 struct net_bridge_vlan_group *vg) 308 { 309 struct bridge_vlan_info vinfo; 310 struct net_bridge_vlan *v; 311 u16 pvid; 312 313 pvid = br_get_pvid(vg); 314 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 315 if (!br_vlan_should_use(v)) 316 continue; 317 318 vinfo.vid = v->vid; 319 vinfo.flags = 0; 320 if (v->vid == pvid) 321 vinfo.flags |= BRIDGE_VLAN_INFO_PVID; 322 323 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 324 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 325 326 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 327 sizeof(vinfo), &vinfo)) 328 goto nla_put_failure; 329 } 330 331 return 0; 332 333 nla_put_failure: 334 return -EMSGSIZE; 335 } 336 337 /* 338 * Create one netlink message for one interface 339 * Contains port and master info as well as carrier and bridge state. 340 */ 341 static int br_fill_ifinfo(struct sk_buff *skb, 342 struct net_bridge_port *port, 343 u32 pid, u32 seq, int event, unsigned int flags, 344 u32 filter_mask, const struct net_device *dev) 345 { 346 struct net_bridge *br; 347 struct ifinfomsg *hdr; 348 struct nlmsghdr *nlh; 349 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 350 351 if (port) 352 br = port->br; 353 else 354 br = netdev_priv(dev); 355 356 br_debug(br, "br_fill_info event %d port %s master %s\n", 357 event, dev->name, br->dev->name); 358 359 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); 360 if (nlh == NULL) 361 return -EMSGSIZE; 362 363 hdr = nlmsg_data(nlh); 364 hdr->ifi_family = AF_BRIDGE; 365 hdr->__ifi_pad = 0; 366 hdr->ifi_type = dev->type; 367 hdr->ifi_index = dev->ifindex; 368 hdr->ifi_flags = dev_get_flags(dev); 369 hdr->ifi_change = 0; 370 371 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 372 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) || 373 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 374 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 375 (dev->addr_len && 376 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 377 (dev->ifindex != dev_get_iflink(dev) && 378 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 379 goto nla_put_failure; 380 381 if (event == RTM_NEWLINK && port) { 382 struct nlattr *nest 383 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 384 385 if (nest == NULL || br_port_fill_attrs(skb, port) < 0) 386 goto nla_put_failure; 387 nla_nest_end(skb, nest); 388 } 389 390 /* Check if the VID information is requested */ 391 if ((filter_mask & RTEXT_FILTER_BRVLAN) || 392 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { 393 struct net_bridge_vlan_group *vg; 394 struct nlattr *af; 395 int err; 396 397 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */ 398 rcu_read_lock(); 399 if (port) 400 vg = nbp_vlan_group_rcu(port); 401 else 402 vg = br_vlan_group_rcu(br); 403 404 if (!vg || !vg->num_vlans) { 405 rcu_read_unlock(); 406 goto done; 407 } 408 af = nla_nest_start(skb, IFLA_AF_SPEC); 409 if (!af) { 410 rcu_read_unlock(); 411 goto nla_put_failure; 412 } 413 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) 414 err = br_fill_ifvlaninfo_compressed(skb, vg); 415 else 416 err = br_fill_ifvlaninfo(skb, vg); 417 rcu_read_unlock(); 418 if (err) 419 goto nla_put_failure; 420 nla_nest_end(skb, af); 421 } 422 423 done: 424 nlmsg_end(skb, nlh); 425 return 0; 426 427 nla_put_failure: 428 nlmsg_cancel(skb, nlh); 429 return -EMSGSIZE; 430 } 431 432 /* 433 * Notify listeners of a change in port information 434 */ 435 void br_ifinfo_notify(int event, struct net_bridge_port *port) 436 { 437 struct net *net; 438 struct sk_buff *skb; 439 int err = -ENOBUFS; 440 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED; 441 442 if (!port) 443 return; 444 445 net = dev_net(port->dev); 446 br_debug(port->br, "port %u(%s) event %d\n", 447 (unsigned int)port->port_no, port->dev->name, event); 448 449 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC); 450 if (skb == NULL) 451 goto errout; 452 453 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev); 454 if (err < 0) { 455 /* -EMSGSIZE implies BUG in br_nlmsg_size() */ 456 WARN_ON(err == -EMSGSIZE); 457 kfree_skb(skb); 458 goto errout; 459 } 460 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 461 return; 462 errout: 463 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 464 } 465 466 467 /* 468 * Dump information about all ports, in response to GETLINK 469 */ 470 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 471 struct net_device *dev, u32 filter_mask, int nlflags) 472 { 473 struct net_bridge_port *port = br_port_get_rtnl(dev); 474 475 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) && 476 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) 477 return 0; 478 479 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags, 480 filter_mask, dev); 481 } 482 483 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p, 484 int cmd, struct bridge_vlan_info *vinfo) 485 { 486 int err = 0; 487 488 switch (cmd) { 489 case RTM_SETLINK: 490 if (p) { 491 /* if the MASTER flag is set this will act on the global 492 * per-VLAN entry as well 493 */ 494 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags); 495 if (err) 496 break; 497 } else { 498 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY; 499 err = br_vlan_add(br, vinfo->vid, vinfo->flags); 500 } 501 break; 502 503 case RTM_DELLINK: 504 if (p) { 505 nbp_vlan_delete(p, vinfo->vid); 506 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) 507 br_vlan_delete(p->br, vinfo->vid); 508 } else { 509 br_vlan_delete(br, vinfo->vid); 510 } 511 break; 512 } 513 514 return err; 515 } 516 517 static int br_afspec(struct net_bridge *br, 518 struct net_bridge_port *p, 519 struct nlattr *af_spec, 520 int cmd) 521 { 522 struct bridge_vlan_info *vinfo_start = NULL; 523 struct bridge_vlan_info *vinfo = NULL; 524 struct nlattr *attr; 525 int err = 0; 526 int rem; 527 528 nla_for_each_nested(attr, af_spec, rem) { 529 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO) 530 continue; 531 if (nla_len(attr) != sizeof(struct bridge_vlan_info)) 532 return -EINVAL; 533 vinfo = nla_data(attr); 534 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK) 535 return -EINVAL; 536 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 537 if (vinfo_start) 538 return -EINVAL; 539 vinfo_start = vinfo; 540 /* don't allow range of pvids */ 541 if (vinfo_start->flags & BRIDGE_VLAN_INFO_PVID) 542 return -EINVAL; 543 continue; 544 } 545 546 if (vinfo_start) { 547 struct bridge_vlan_info tmp_vinfo; 548 int v; 549 550 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END)) 551 return -EINVAL; 552 553 if (vinfo->vid <= vinfo_start->vid) 554 return -EINVAL; 555 556 memcpy(&tmp_vinfo, vinfo_start, 557 sizeof(struct bridge_vlan_info)); 558 559 for (v = vinfo_start->vid; v <= vinfo->vid; v++) { 560 tmp_vinfo.vid = v; 561 err = br_vlan_info(br, p, cmd, &tmp_vinfo); 562 if (err) 563 break; 564 } 565 vinfo_start = NULL; 566 } else { 567 err = br_vlan_info(br, p, cmd, vinfo); 568 } 569 if (err) 570 break; 571 } 572 573 return err; 574 } 575 576 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = { 577 [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, 578 [IFLA_BRPORT_COST] = { .type = NLA_U32 }, 579 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, 580 [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, 581 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, 582 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, 583 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 }, 584 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, 585 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, 586 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 }, 587 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 }, 588 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 }, 589 }; 590 591 /* Change the state of the port and notify spanning tree */ 592 static int br_set_port_state(struct net_bridge_port *p, u8 state) 593 { 594 if (state > BR_STATE_BLOCKING) 595 return -EINVAL; 596 597 /* if kernel STP is running, don't allow changes */ 598 if (p->br->stp_enabled == BR_KERNEL_STP) 599 return -EBUSY; 600 601 /* if device is not up, change is not allowed 602 * if link is not present, only allowable state is disabled 603 */ 604 if (!netif_running(p->dev) || 605 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED)) 606 return -ENETDOWN; 607 608 br_set_state(p, state); 609 br_port_state_selection(p->br); 610 return 0; 611 } 612 613 /* Set/clear or port flags based on attribute */ 614 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[], 615 int attrtype, unsigned long mask) 616 { 617 if (tb[attrtype]) { 618 u8 flag = nla_get_u8(tb[attrtype]); 619 if (flag) 620 p->flags |= mask; 621 else 622 p->flags &= ~mask; 623 } 624 } 625 626 /* Process bridge protocol info on port */ 627 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[]) 628 { 629 int err; 630 unsigned long old_flags = p->flags; 631 632 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE); 633 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD); 634 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE); 635 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK); 636 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING); 637 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD); 638 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD); 639 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP); 640 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI); 641 642 if (tb[IFLA_BRPORT_COST]) { 643 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST])); 644 if (err) 645 return err; 646 } 647 648 if (tb[IFLA_BRPORT_PRIORITY]) { 649 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY])); 650 if (err) 651 return err; 652 } 653 654 if (tb[IFLA_BRPORT_STATE]) { 655 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE])); 656 if (err) 657 return err; 658 } 659 660 if (tb[IFLA_BRPORT_FLUSH]) 661 br_fdb_delete_by_port(p->br, p, 0, 0); 662 663 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 664 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) { 665 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]); 666 667 err = br_multicast_set_port_router(p, mcast_router); 668 if (err) 669 return err; 670 } 671 #endif 672 br_port_flags_change(p, old_flags ^ p->flags); 673 return 0; 674 } 675 676 /* Change state and parameters on port. */ 677 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 678 { 679 struct nlattr *protinfo; 680 struct nlattr *afspec; 681 struct net_bridge_port *p; 682 struct nlattr *tb[IFLA_BRPORT_MAX + 1]; 683 int err = 0; 684 685 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO); 686 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 687 if (!protinfo && !afspec) 688 return 0; 689 690 p = br_port_get_rtnl(dev); 691 /* We want to accept dev as bridge itself if the AF_SPEC 692 * is set to see if someone is setting vlan info on the bridge 693 */ 694 if (!p && !afspec) 695 return -EINVAL; 696 697 if (p && protinfo) { 698 if (protinfo->nla_type & NLA_F_NESTED) { 699 err = nla_parse_nested(tb, IFLA_BRPORT_MAX, 700 protinfo, br_port_policy); 701 if (err) 702 return err; 703 704 spin_lock_bh(&p->br->lock); 705 err = br_setport(p, tb); 706 spin_unlock_bh(&p->br->lock); 707 } else { 708 /* Binary compatibility with old RSTP */ 709 if (nla_len(protinfo) < sizeof(u8)) 710 return -EINVAL; 711 712 spin_lock_bh(&p->br->lock); 713 err = br_set_port_state(p, nla_get_u8(protinfo)); 714 spin_unlock_bh(&p->br->lock); 715 } 716 if (err) 717 goto out; 718 } 719 720 if (afspec) { 721 err = br_afspec((struct net_bridge *)netdev_priv(dev), p, 722 afspec, RTM_SETLINK); 723 } 724 725 if (err == 0) 726 br_ifinfo_notify(RTM_NEWLINK, p); 727 out: 728 return err; 729 } 730 731 /* Delete port information */ 732 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 733 { 734 struct nlattr *afspec; 735 struct net_bridge_port *p; 736 int err = 0; 737 738 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 739 if (!afspec) 740 return 0; 741 742 p = br_port_get_rtnl(dev); 743 /* We want to accept dev as bridge itself as well */ 744 if (!p && !(dev->priv_flags & IFF_EBRIDGE)) 745 return -EINVAL; 746 747 err = br_afspec((struct net_bridge *)netdev_priv(dev), p, 748 afspec, RTM_DELLINK); 749 if (err == 0) 750 /* Send RTM_NEWLINK because userspace 751 * expects RTM_NEWLINK for vlan dels 752 */ 753 br_ifinfo_notify(RTM_NEWLINK, p); 754 755 return err; 756 } 757 static int br_validate(struct nlattr *tb[], struct nlattr *data[]) 758 { 759 if (tb[IFLA_ADDRESS]) { 760 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 761 return -EINVAL; 762 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 763 return -EADDRNOTAVAIL; 764 } 765 766 if (!data) 767 return 0; 768 769 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 770 if (data[IFLA_BR_VLAN_PROTOCOL]) { 771 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) { 772 case htons(ETH_P_8021Q): 773 case htons(ETH_P_8021AD): 774 break; 775 default: 776 return -EPROTONOSUPPORT; 777 } 778 } 779 #endif 780 781 return 0; 782 } 783 784 static int br_dev_newlink(struct net *src_net, struct net_device *dev, 785 struct nlattr *tb[], struct nlattr *data[]) 786 { 787 struct net_bridge *br = netdev_priv(dev); 788 789 if (tb[IFLA_ADDRESS]) { 790 spin_lock_bh(&br->lock); 791 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS])); 792 spin_unlock_bh(&br->lock); 793 } 794 795 return register_netdevice(dev); 796 } 797 798 static int br_port_slave_changelink(struct net_device *brdev, 799 struct net_device *dev, 800 struct nlattr *tb[], 801 struct nlattr *data[]) 802 { 803 struct net_bridge *br = netdev_priv(brdev); 804 int ret; 805 806 if (!data) 807 return 0; 808 809 spin_lock_bh(&br->lock); 810 ret = br_setport(br_port_get_rtnl(dev), data); 811 spin_unlock_bh(&br->lock); 812 813 return ret; 814 } 815 816 static int br_port_fill_slave_info(struct sk_buff *skb, 817 const struct net_device *brdev, 818 const struct net_device *dev) 819 { 820 return br_port_fill_attrs(skb, br_port_get_rtnl(dev)); 821 } 822 823 static size_t br_port_get_slave_size(const struct net_device *brdev, 824 const struct net_device *dev) 825 { 826 return br_port_info_size(); 827 } 828 829 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = { 830 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 }, 831 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 }, 832 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 }, 833 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 }, 834 [IFLA_BR_STP_STATE] = { .type = NLA_U32 }, 835 [IFLA_BR_PRIORITY] = { .type = NLA_U16 }, 836 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 }, 837 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 }, 838 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 }, 839 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY, 840 .len = ETH_ALEN }, 841 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 }, 842 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 }, 843 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 }, 844 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 }, 845 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 }, 846 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 }, 847 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 }, 848 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 }, 849 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 }, 850 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 }, 851 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 }, 852 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 }, 853 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 }, 854 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 }, 855 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 }, 856 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 }, 857 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 }, 858 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 }, 859 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 }, 860 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 }, 861 }; 862 863 static int br_changelink(struct net_device *brdev, struct nlattr *tb[], 864 struct nlattr *data[]) 865 { 866 struct net_bridge *br = netdev_priv(brdev); 867 int err; 868 869 if (!data) 870 return 0; 871 872 if (data[IFLA_BR_FORWARD_DELAY]) { 873 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY])); 874 if (err) 875 return err; 876 } 877 878 if (data[IFLA_BR_HELLO_TIME]) { 879 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME])); 880 if (err) 881 return err; 882 } 883 884 if (data[IFLA_BR_MAX_AGE]) { 885 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE])); 886 if (err) 887 return err; 888 } 889 890 if (data[IFLA_BR_AGEING_TIME]) { 891 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME])); 892 if (err) 893 return err; 894 } 895 896 if (data[IFLA_BR_STP_STATE]) { 897 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]); 898 899 br_stp_set_enabled(br, stp_enabled); 900 } 901 902 if (data[IFLA_BR_PRIORITY]) { 903 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]); 904 905 br_stp_set_bridge_priority(br, priority); 906 } 907 908 if (data[IFLA_BR_VLAN_FILTERING]) { 909 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]); 910 911 err = __br_vlan_filter_toggle(br, vlan_filter); 912 if (err) 913 return err; 914 } 915 916 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 917 if (data[IFLA_BR_VLAN_PROTOCOL]) { 918 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]); 919 920 err = __br_vlan_set_proto(br, vlan_proto); 921 if (err) 922 return err; 923 } 924 925 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { 926 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); 927 928 err = __br_vlan_set_default_pvid(br, defpvid); 929 if (err) 930 return err; 931 } 932 933 if (data[IFLA_BR_VLAN_STATS_ENABLED]) { 934 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]); 935 936 err = br_vlan_set_stats(br, vlan_stats); 937 if (err) 938 return err; 939 } 940 #endif 941 942 if (data[IFLA_BR_GROUP_FWD_MASK]) { 943 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]); 944 945 if (fwd_mask & BR_GROUPFWD_RESTRICTED) 946 return -EINVAL; 947 br->group_fwd_mask = fwd_mask; 948 } 949 950 if (data[IFLA_BR_GROUP_ADDR]) { 951 u8 new_addr[ETH_ALEN]; 952 953 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN) 954 return -EINVAL; 955 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN); 956 if (!is_link_local_ether_addr(new_addr)) 957 return -EINVAL; 958 if (new_addr[5] == 1 || /* 802.3x Pause address */ 959 new_addr[5] == 2 || /* 802.3ad Slow protocols */ 960 new_addr[5] == 3) /* 802.1X PAE address */ 961 return -EINVAL; 962 spin_lock_bh(&br->lock); 963 memcpy(br->group_addr, new_addr, sizeof(br->group_addr)); 964 spin_unlock_bh(&br->lock); 965 br->group_addr_set = true; 966 br_recalculate_fwd_mask(br); 967 } 968 969 if (data[IFLA_BR_FDB_FLUSH]) 970 br_fdb_flush(br); 971 972 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 973 if (data[IFLA_BR_MCAST_ROUTER]) { 974 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]); 975 976 err = br_multicast_set_router(br, multicast_router); 977 if (err) 978 return err; 979 } 980 981 if (data[IFLA_BR_MCAST_SNOOPING]) { 982 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]); 983 984 err = br_multicast_toggle(br, mcast_snooping); 985 if (err) 986 return err; 987 } 988 989 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) { 990 u8 val; 991 992 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]); 993 br->multicast_query_use_ifaddr = !!val; 994 } 995 996 if (data[IFLA_BR_MCAST_QUERIER]) { 997 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]); 998 999 err = br_multicast_set_querier(br, mcast_querier); 1000 if (err) 1001 return err; 1002 } 1003 1004 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) { 1005 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]); 1006 1007 br->hash_elasticity = val; 1008 } 1009 1010 if (data[IFLA_BR_MCAST_HASH_MAX]) { 1011 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]); 1012 1013 err = br_multicast_set_hash_max(br, hash_max); 1014 if (err) 1015 return err; 1016 } 1017 1018 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) { 1019 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]); 1020 1021 br->multicast_last_member_count = val; 1022 } 1023 1024 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) { 1025 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]); 1026 1027 br->multicast_startup_query_count = val; 1028 } 1029 1030 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) { 1031 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]); 1032 1033 br->multicast_last_member_interval = clock_t_to_jiffies(val); 1034 } 1035 1036 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) { 1037 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]); 1038 1039 br->multicast_membership_interval = clock_t_to_jiffies(val); 1040 } 1041 1042 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) { 1043 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]); 1044 1045 br->multicast_querier_interval = clock_t_to_jiffies(val); 1046 } 1047 1048 if (data[IFLA_BR_MCAST_QUERY_INTVL]) { 1049 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]); 1050 1051 br->multicast_query_interval = clock_t_to_jiffies(val); 1052 } 1053 1054 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) { 1055 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]); 1056 1057 br->multicast_query_response_interval = clock_t_to_jiffies(val); 1058 } 1059 1060 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) { 1061 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]); 1062 1063 br->multicast_startup_query_interval = clock_t_to_jiffies(val); 1064 } 1065 1066 if (data[IFLA_BR_MCAST_STATS_ENABLED]) { 1067 __u8 mcast_stats; 1068 1069 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]); 1070 br->multicast_stats_enabled = !!mcast_stats; 1071 } 1072 #endif 1073 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1074 if (data[IFLA_BR_NF_CALL_IPTABLES]) { 1075 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]); 1076 1077 br->nf_call_iptables = val ? true : false; 1078 } 1079 1080 if (data[IFLA_BR_NF_CALL_IP6TABLES]) { 1081 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]); 1082 1083 br->nf_call_ip6tables = val ? true : false; 1084 } 1085 1086 if (data[IFLA_BR_NF_CALL_ARPTABLES]) { 1087 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]); 1088 1089 br->nf_call_arptables = val ? true : false; 1090 } 1091 #endif 1092 1093 return 0; 1094 } 1095 1096 static size_t br_get_size(const struct net_device *brdev) 1097 { 1098 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */ 1099 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */ 1100 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */ 1101 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */ 1102 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */ 1103 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */ 1104 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */ 1105 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1106 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */ 1107 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */ 1108 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */ 1109 #endif 1110 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */ 1111 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */ 1112 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */ 1113 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */ 1114 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */ 1115 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */ 1116 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */ 1117 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */ 1118 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */ 1119 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */ 1120 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */ 1121 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */ 1122 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1123 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */ 1124 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */ 1125 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */ 1126 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */ 1127 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */ 1128 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */ 1129 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */ 1130 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */ 1131 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */ 1132 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */ 1133 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */ 1134 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */ 1135 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */ 1136 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */ 1137 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */ 1138 #endif 1139 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1140 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */ 1141 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */ 1142 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */ 1143 #endif 1144 0; 1145 } 1146 1147 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev) 1148 { 1149 struct net_bridge *br = netdev_priv(brdev); 1150 u32 forward_delay = jiffies_to_clock_t(br->forward_delay); 1151 u32 hello_time = jiffies_to_clock_t(br->hello_time); 1152 u32 age_time = jiffies_to_clock_t(br->max_age); 1153 u32 ageing_time = jiffies_to_clock_t(br->ageing_time); 1154 u32 stp_enabled = br->stp_enabled; 1155 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]; 1156 u8 vlan_enabled = br_vlan_enabled(br); 1157 u64 clockval; 1158 1159 clockval = br_timer_value(&br->hello_timer); 1160 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD)) 1161 return -EMSGSIZE; 1162 clockval = br_timer_value(&br->tcn_timer); 1163 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD)) 1164 return -EMSGSIZE; 1165 clockval = br_timer_value(&br->topology_change_timer); 1166 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval, 1167 IFLA_BR_PAD)) 1168 return -EMSGSIZE; 1169 clockval = br_timer_value(&br->gc_timer); 1170 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD)) 1171 return -EMSGSIZE; 1172 1173 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) || 1174 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) || 1175 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) || 1176 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) || 1177 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) || 1178 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) || 1179 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) || 1180 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) || 1181 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id), 1182 &br->bridge_id) || 1183 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id), 1184 &br->designated_root) || 1185 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) || 1186 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) || 1187 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) || 1188 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED, 1189 br->topology_change_detected) || 1190 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr)) 1191 return -EMSGSIZE; 1192 1193 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1194 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) || 1195 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) || 1196 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled)) 1197 return -EMSGSIZE; 1198 #endif 1199 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1200 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) || 1201 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) || 1202 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR, 1203 br->multicast_query_use_ifaddr) || 1204 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) || 1205 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED, 1206 br->multicast_stats_enabled) || 1207 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, 1208 br->hash_elasticity) || 1209 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) || 1210 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT, 1211 br->multicast_last_member_count) || 1212 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT, 1213 br->multicast_startup_query_count)) 1214 return -EMSGSIZE; 1215 1216 clockval = jiffies_to_clock_t(br->multicast_last_member_interval); 1217 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval, 1218 IFLA_BR_PAD)) 1219 return -EMSGSIZE; 1220 clockval = jiffies_to_clock_t(br->multicast_membership_interval); 1221 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval, 1222 IFLA_BR_PAD)) 1223 return -EMSGSIZE; 1224 clockval = jiffies_to_clock_t(br->multicast_querier_interval); 1225 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval, 1226 IFLA_BR_PAD)) 1227 return -EMSGSIZE; 1228 clockval = jiffies_to_clock_t(br->multicast_query_interval); 1229 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval, 1230 IFLA_BR_PAD)) 1231 return -EMSGSIZE; 1232 clockval = jiffies_to_clock_t(br->multicast_query_response_interval); 1233 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval, 1234 IFLA_BR_PAD)) 1235 return -EMSGSIZE; 1236 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval); 1237 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval, 1238 IFLA_BR_PAD)) 1239 return -EMSGSIZE; 1240 #endif 1241 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1242 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES, 1243 br->nf_call_iptables ? 1 : 0) || 1244 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES, 1245 br->nf_call_ip6tables ? 1 : 0) || 1246 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES, 1247 br->nf_call_arptables ? 1 : 0)) 1248 return -EMSGSIZE; 1249 #endif 1250 1251 return 0; 1252 } 1253 1254 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr) 1255 { 1256 struct net_bridge_port *p = NULL; 1257 struct net_bridge_vlan_group *vg; 1258 struct net_bridge_vlan *v; 1259 struct net_bridge *br; 1260 int numvls = 0; 1261 1262 switch (attr) { 1263 case IFLA_STATS_LINK_XSTATS: 1264 br = netdev_priv(dev); 1265 vg = br_vlan_group(br); 1266 break; 1267 case IFLA_STATS_LINK_XSTATS_SLAVE: 1268 p = br_port_get_rtnl(dev); 1269 if (!p) 1270 return 0; 1271 br = p->br; 1272 vg = nbp_vlan_group(p); 1273 break; 1274 default: 1275 return 0; 1276 } 1277 1278 if (vg) { 1279 /* we need to count all, even placeholder entries */ 1280 list_for_each_entry(v, &vg->vlan_list, vlist) 1281 numvls++; 1282 } 1283 1284 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) + 1285 nla_total_size(sizeof(struct br_mcast_stats)) + 1286 nla_total_size(0); 1287 } 1288 1289 static int br_fill_linkxstats(struct sk_buff *skb, 1290 const struct net_device *dev, 1291 int *prividx, int attr) 1292 { 1293 struct nlattr *nla __maybe_unused; 1294 struct net_bridge_port *p = NULL; 1295 struct net_bridge_vlan_group *vg; 1296 struct net_bridge_vlan *v; 1297 struct net_bridge *br; 1298 struct nlattr *nest; 1299 int vl_idx = 0; 1300 1301 switch (attr) { 1302 case IFLA_STATS_LINK_XSTATS: 1303 br = netdev_priv(dev); 1304 vg = br_vlan_group(br); 1305 break; 1306 case IFLA_STATS_LINK_XSTATS_SLAVE: 1307 p = br_port_get_rtnl(dev); 1308 if (!p) 1309 return 0; 1310 br = p->br; 1311 vg = nbp_vlan_group(p); 1312 break; 1313 default: 1314 return -EINVAL; 1315 } 1316 1317 nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE); 1318 if (!nest) 1319 return -EMSGSIZE; 1320 1321 if (vg) { 1322 u16 pvid; 1323 1324 pvid = br_get_pvid(vg); 1325 list_for_each_entry(v, &vg->vlan_list, vlist) { 1326 struct bridge_vlan_xstats vxi; 1327 struct br_vlan_stats stats; 1328 1329 if (++vl_idx < *prividx) 1330 continue; 1331 memset(&vxi, 0, sizeof(vxi)); 1332 vxi.vid = v->vid; 1333 vxi.flags = v->flags; 1334 if (v->vid == pvid) 1335 vxi.flags |= BRIDGE_VLAN_INFO_PVID; 1336 br_vlan_get_stats(v, &stats); 1337 vxi.rx_bytes = stats.rx_bytes; 1338 vxi.rx_packets = stats.rx_packets; 1339 vxi.tx_bytes = stats.tx_bytes; 1340 vxi.tx_packets = stats.tx_packets; 1341 1342 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi)) 1343 goto nla_put_failure; 1344 } 1345 } 1346 1347 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1348 if (++vl_idx >= *prividx) { 1349 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST, 1350 sizeof(struct br_mcast_stats), 1351 BRIDGE_XSTATS_PAD); 1352 if (!nla) 1353 goto nla_put_failure; 1354 br_multicast_get_stats(br, p, nla_data(nla)); 1355 } 1356 #endif 1357 nla_nest_end(skb, nest); 1358 *prividx = 0; 1359 1360 return 0; 1361 1362 nla_put_failure: 1363 nla_nest_end(skb, nest); 1364 *prividx = vl_idx; 1365 1366 return -EMSGSIZE; 1367 } 1368 1369 static struct rtnl_af_ops br_af_ops __read_mostly = { 1370 .family = AF_BRIDGE, 1371 .get_link_af_size = br_get_link_af_size_filtered, 1372 }; 1373 1374 struct rtnl_link_ops br_link_ops __read_mostly = { 1375 .kind = "bridge", 1376 .priv_size = sizeof(struct net_bridge), 1377 .setup = br_dev_setup, 1378 .maxtype = IFLA_BR_MAX, 1379 .policy = br_policy, 1380 .validate = br_validate, 1381 .newlink = br_dev_newlink, 1382 .changelink = br_changelink, 1383 .dellink = br_dev_delete, 1384 .get_size = br_get_size, 1385 .fill_info = br_fill_info, 1386 .fill_linkxstats = br_fill_linkxstats, 1387 .get_linkxstats_size = br_get_linkxstats_size, 1388 1389 .slave_maxtype = IFLA_BRPORT_MAX, 1390 .slave_policy = br_port_policy, 1391 .slave_changelink = br_port_slave_changelink, 1392 .get_slave_size = br_port_get_slave_size, 1393 .fill_slave_info = br_port_fill_slave_info, 1394 }; 1395 1396 int __init br_netlink_init(void) 1397 { 1398 int err; 1399 1400 br_mdb_init(); 1401 rtnl_af_register(&br_af_ops); 1402 1403 err = rtnl_link_register(&br_link_ops); 1404 if (err) 1405 goto out_af; 1406 1407 return 0; 1408 1409 out_af: 1410 rtnl_af_unregister(&br_af_ops); 1411 br_mdb_uninit(); 1412 return err; 1413 } 1414 1415 void br_netlink_fini(void) 1416 { 1417 br_mdb_uninit(); 1418 rtnl_af_unregister(&br_af_ops); 1419 rtnl_link_unregister(&br_link_ops); 1420 } 1421