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 #include "br_private_tunnel.h" 24 25 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg, 26 u32 filter_mask) 27 { 28 struct net_bridge_vlan *v; 29 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0; 30 u16 flags, pvid; 31 int num_vlans = 0; 32 33 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) 34 return 0; 35 36 pvid = br_get_pvid(vg); 37 /* Count number of vlan infos */ 38 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 39 flags = 0; 40 /* only a context, bridge vlan not activated */ 41 if (!br_vlan_should_use(v)) 42 continue; 43 if (v->vid == pvid) 44 flags |= BRIDGE_VLAN_INFO_PVID; 45 46 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 47 flags |= BRIDGE_VLAN_INFO_UNTAGGED; 48 49 if (vid_range_start == 0) { 50 goto initvars; 51 } else if ((v->vid - vid_range_end) == 1 && 52 flags == vid_range_flags) { 53 vid_range_end = v->vid; 54 continue; 55 } else { 56 if ((vid_range_end - vid_range_start) > 0) 57 num_vlans += 2; 58 else 59 num_vlans += 1; 60 } 61 initvars: 62 vid_range_start = v->vid; 63 vid_range_end = v->vid; 64 vid_range_flags = flags; 65 } 66 67 if (vid_range_start != 0) { 68 if ((vid_range_end - vid_range_start) > 0) 69 num_vlans += 2; 70 else 71 num_vlans += 1; 72 } 73 74 return num_vlans; 75 } 76 77 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg, 78 u32 filter_mask) 79 { 80 int num_vlans; 81 82 if (!vg) 83 return 0; 84 85 if (filter_mask & RTEXT_FILTER_BRVLAN) 86 return vg->num_vlans; 87 88 rcu_read_lock(); 89 num_vlans = __get_num_vlan_infos(vg, filter_mask); 90 rcu_read_unlock(); 91 92 return num_vlans; 93 } 94 95 static size_t br_get_link_af_size_filtered(const struct net_device *dev, 96 u32 filter_mask) 97 { 98 struct net_bridge_vlan_group *vg = NULL; 99 struct net_bridge_port *p = NULL; 100 struct net_bridge *br; 101 int num_vlan_infos; 102 size_t vinfo_sz = 0; 103 104 rcu_read_lock(); 105 if (br_port_exists(dev)) { 106 p = br_port_get_rcu(dev); 107 vg = nbp_vlan_group_rcu(p); 108 } else if (dev->priv_flags & IFF_EBRIDGE) { 109 br = netdev_priv(dev); 110 vg = br_vlan_group_rcu(br); 111 } 112 num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask); 113 rcu_read_unlock(); 114 115 if (p && (p->flags & BR_VLAN_TUNNEL)) 116 vinfo_sz += br_get_vlan_tunnel_info_size(vg); 117 118 /* Each VLAN is returned in bridge_vlan_info along with flags */ 119 vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info)); 120 121 return vinfo_sz; 122 } 123 124 static inline size_t br_port_info_size(void) 125 { 126 return nla_total_size(1) /* IFLA_BRPORT_STATE */ 127 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */ 128 + nla_total_size(4) /* IFLA_BRPORT_COST */ 129 + nla_total_size(1) /* IFLA_BRPORT_MODE */ 130 + nla_total_size(1) /* IFLA_BRPORT_GUARD */ 131 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */ 132 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */ 133 + nla_total_size(1) /* IFLA_BRPORT_MCAST_TO_UCAST */ 134 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */ 135 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */ 136 + nla_total_size(1) /* IFLA_BRPORT_MCAST_FLOOD */ 137 + nla_total_size(1) /* IFLA_BRPORT_BCAST_FLOOD */ 138 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */ 139 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */ 140 + nla_total_size(1) /* IFLA_BRPORT_VLAN_TUNNEL */ 141 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */ 142 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */ 143 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */ 144 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */ 145 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */ 146 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */ 147 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */ 148 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */ 149 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */ 150 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */ 151 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */ 152 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 153 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */ 154 #endif 155 + 0; 156 } 157 158 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask) 159 { 160 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 161 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 162 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 163 + nla_total_size(4) /* IFLA_MASTER */ 164 + nla_total_size(4) /* IFLA_MTU */ 165 + nla_total_size(4) /* IFLA_LINK */ 166 + nla_total_size(1) /* IFLA_OPERSTATE */ 167 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */ 168 + nla_total_size(br_get_link_af_size_filtered(dev, 169 filter_mask)); /* IFLA_AF_SPEC */ 170 } 171 172 static int br_port_fill_attrs(struct sk_buff *skb, 173 const struct net_bridge_port *p) 174 { 175 u8 mode = !!(p->flags & BR_HAIRPIN_MODE); 176 u64 timerval; 177 178 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) || 179 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) || 180 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) || 181 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) || 182 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) || 183 nla_put_u8(skb, IFLA_BRPORT_PROTECT, 184 !!(p->flags & BR_ROOT_BLOCK)) || 185 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, 186 !!(p->flags & BR_MULTICAST_FAST_LEAVE)) || 187 nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST, 188 !!(p->flags & BR_MULTICAST_TO_UNICAST)) || 189 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) || 190 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, 191 !!(p->flags & BR_FLOOD)) || 192 nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD, 193 !!(p->flags & BR_MCAST_FLOOD)) || 194 nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD, 195 !!(p->flags & BR_BCAST_FLOOD)) || 196 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) || 197 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI, 198 !!(p->flags & BR_PROXYARP_WIFI)) || 199 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id), 200 &p->designated_root) || 201 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id), 202 &p->designated_bridge) || 203 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) || 204 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) || 205 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) || 206 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) || 207 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK, 208 p->topology_change_ack) || 209 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) || 210 nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags & 211 BR_VLAN_TUNNEL))) 212 return -EMSGSIZE; 213 214 timerval = br_timer_value(&p->message_age_timer); 215 if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval, 216 IFLA_BRPORT_PAD)) 217 return -EMSGSIZE; 218 timerval = br_timer_value(&p->forward_delay_timer); 219 if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval, 220 IFLA_BRPORT_PAD)) 221 return -EMSGSIZE; 222 timerval = br_timer_value(&p->hold_timer); 223 if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval, 224 IFLA_BRPORT_PAD)) 225 return -EMSGSIZE; 226 227 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 228 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER, 229 p->multicast_router)) 230 return -EMSGSIZE; 231 #endif 232 233 return 0; 234 } 235 236 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start, 237 u16 vid_end, u16 flags) 238 { 239 struct bridge_vlan_info vinfo; 240 241 if ((vid_end - vid_start) > 0) { 242 /* add range to skb */ 243 vinfo.vid = vid_start; 244 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN; 245 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 246 sizeof(vinfo), &vinfo)) 247 goto nla_put_failure; 248 249 vinfo.vid = vid_end; 250 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END; 251 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 252 sizeof(vinfo), &vinfo)) 253 goto nla_put_failure; 254 } else { 255 vinfo.vid = vid_start; 256 vinfo.flags = flags; 257 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 258 sizeof(vinfo), &vinfo)) 259 goto nla_put_failure; 260 } 261 262 return 0; 263 264 nla_put_failure: 265 return -EMSGSIZE; 266 } 267 268 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb, 269 struct net_bridge_vlan_group *vg) 270 { 271 struct net_bridge_vlan *v; 272 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0; 273 u16 flags, pvid; 274 int err = 0; 275 276 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan 277 * and mark vlan info with begin and end flags 278 * if vlaninfo represents a range 279 */ 280 pvid = br_get_pvid(vg); 281 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 282 flags = 0; 283 if (!br_vlan_should_use(v)) 284 continue; 285 if (v->vid == pvid) 286 flags |= BRIDGE_VLAN_INFO_PVID; 287 288 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 289 flags |= BRIDGE_VLAN_INFO_UNTAGGED; 290 291 if (vid_range_start == 0) { 292 goto initvars; 293 } else if ((v->vid - vid_range_end) == 1 && 294 flags == vid_range_flags) { 295 vid_range_end = v->vid; 296 continue; 297 } else { 298 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 299 vid_range_end, 300 vid_range_flags); 301 if (err) 302 return err; 303 } 304 305 initvars: 306 vid_range_start = v->vid; 307 vid_range_end = v->vid; 308 vid_range_flags = flags; 309 } 310 311 if (vid_range_start != 0) { 312 /* Call it once more to send any left over vlans */ 313 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 314 vid_range_end, 315 vid_range_flags); 316 if (err) 317 return err; 318 } 319 320 return 0; 321 } 322 323 static int br_fill_ifvlaninfo(struct sk_buff *skb, 324 struct net_bridge_vlan_group *vg) 325 { 326 struct bridge_vlan_info vinfo; 327 struct net_bridge_vlan *v; 328 u16 pvid; 329 330 pvid = br_get_pvid(vg); 331 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 332 if (!br_vlan_should_use(v)) 333 continue; 334 335 vinfo.vid = v->vid; 336 vinfo.flags = 0; 337 if (v->vid == pvid) 338 vinfo.flags |= BRIDGE_VLAN_INFO_PVID; 339 340 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 341 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 342 343 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 344 sizeof(vinfo), &vinfo)) 345 goto nla_put_failure; 346 } 347 348 return 0; 349 350 nla_put_failure: 351 return -EMSGSIZE; 352 } 353 354 /* 355 * Create one netlink message for one interface 356 * Contains port and master info as well as carrier and bridge state. 357 */ 358 static int br_fill_ifinfo(struct sk_buff *skb, 359 struct net_bridge_port *port, 360 u32 pid, u32 seq, int event, unsigned int flags, 361 u32 filter_mask, const struct net_device *dev) 362 { 363 struct net_bridge *br; 364 struct ifinfomsg *hdr; 365 struct nlmsghdr *nlh; 366 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 367 368 if (port) 369 br = port->br; 370 else 371 br = netdev_priv(dev); 372 373 br_debug(br, "br_fill_info event %d port %s master %s\n", 374 event, dev->name, br->dev->name); 375 376 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); 377 if (nlh == NULL) 378 return -EMSGSIZE; 379 380 hdr = nlmsg_data(nlh); 381 hdr->ifi_family = AF_BRIDGE; 382 hdr->__ifi_pad = 0; 383 hdr->ifi_type = dev->type; 384 hdr->ifi_index = dev->ifindex; 385 hdr->ifi_flags = dev_get_flags(dev); 386 hdr->ifi_change = 0; 387 388 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 389 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) || 390 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 391 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 392 (dev->addr_len && 393 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 394 (dev->ifindex != dev_get_iflink(dev) && 395 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 396 goto nla_put_failure; 397 398 if (event == RTM_NEWLINK && port) { 399 struct nlattr *nest 400 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 401 402 if (nest == NULL || br_port_fill_attrs(skb, port) < 0) 403 goto nla_put_failure; 404 nla_nest_end(skb, nest); 405 } 406 407 /* Check if the VID information is requested */ 408 if ((filter_mask & RTEXT_FILTER_BRVLAN) || 409 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { 410 struct net_bridge_vlan_group *vg; 411 struct nlattr *af; 412 int err; 413 414 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */ 415 rcu_read_lock(); 416 if (port) 417 vg = nbp_vlan_group_rcu(port); 418 else 419 vg = br_vlan_group_rcu(br); 420 421 if (!vg || !vg->num_vlans) { 422 rcu_read_unlock(); 423 goto done; 424 } 425 af = nla_nest_start(skb, IFLA_AF_SPEC); 426 if (!af) { 427 rcu_read_unlock(); 428 goto nla_put_failure; 429 } 430 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) 431 err = br_fill_ifvlaninfo_compressed(skb, vg); 432 else 433 err = br_fill_ifvlaninfo(skb, vg); 434 435 if (port && (port->flags & BR_VLAN_TUNNEL)) 436 err = br_fill_vlan_tunnel_info(skb, vg); 437 rcu_read_unlock(); 438 if (err) 439 goto nla_put_failure; 440 nla_nest_end(skb, af); 441 } 442 443 done: 444 nlmsg_end(skb, nlh); 445 return 0; 446 447 nla_put_failure: 448 nlmsg_cancel(skb, nlh); 449 return -EMSGSIZE; 450 } 451 452 /* 453 * Notify listeners of a change in port information 454 */ 455 void br_ifinfo_notify(int event, struct net_bridge_port *port) 456 { 457 struct net *net; 458 struct sk_buff *skb; 459 int err = -ENOBUFS; 460 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED; 461 462 if (!port) 463 return; 464 465 net = dev_net(port->dev); 466 br_debug(port->br, "port %u(%s) event %d\n", 467 (unsigned int)port->port_no, port->dev->name, event); 468 469 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC); 470 if (skb == NULL) 471 goto errout; 472 473 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev); 474 if (err < 0) { 475 /* -EMSGSIZE implies BUG in br_nlmsg_size() */ 476 WARN_ON(err == -EMSGSIZE); 477 kfree_skb(skb); 478 goto errout; 479 } 480 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 481 return; 482 errout: 483 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 484 } 485 486 487 /* 488 * Dump information about all ports, in response to GETLINK 489 */ 490 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 491 struct net_device *dev, u32 filter_mask, int nlflags) 492 { 493 struct net_bridge_port *port = br_port_get_rtnl(dev); 494 495 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) && 496 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) 497 return 0; 498 499 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags, 500 filter_mask, dev); 501 } 502 503 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p, 504 int cmd, struct bridge_vlan_info *vinfo) 505 { 506 int err = 0; 507 508 switch (cmd) { 509 case RTM_SETLINK: 510 if (p) { 511 /* if the MASTER flag is set this will act on the global 512 * per-VLAN entry as well 513 */ 514 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags); 515 if (err) 516 break; 517 } else { 518 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY; 519 err = br_vlan_add(br, vinfo->vid, vinfo->flags); 520 } 521 break; 522 523 case RTM_DELLINK: 524 if (p) { 525 nbp_vlan_delete(p, vinfo->vid); 526 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) 527 br_vlan_delete(p->br, vinfo->vid); 528 } else { 529 br_vlan_delete(br, vinfo->vid); 530 } 531 break; 532 } 533 534 return err; 535 } 536 537 static int br_process_vlan_info(struct net_bridge *br, 538 struct net_bridge_port *p, int cmd, 539 struct bridge_vlan_info *vinfo_curr, 540 struct bridge_vlan_info **vinfo_last) 541 { 542 if (!vinfo_curr->vid || vinfo_curr->vid >= VLAN_VID_MASK) 543 return -EINVAL; 544 545 if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 546 /* check if we are already processing a range */ 547 if (*vinfo_last) 548 return -EINVAL; 549 *vinfo_last = vinfo_curr; 550 /* don't allow range of pvids */ 551 if ((*vinfo_last)->flags & BRIDGE_VLAN_INFO_PVID) 552 return -EINVAL; 553 return 0; 554 } 555 556 if (*vinfo_last) { 557 struct bridge_vlan_info tmp_vinfo; 558 int v, err; 559 560 if (!(vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END)) 561 return -EINVAL; 562 563 if (vinfo_curr->vid <= (*vinfo_last)->vid) 564 return -EINVAL; 565 566 memcpy(&tmp_vinfo, *vinfo_last, 567 sizeof(struct bridge_vlan_info)); 568 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) { 569 tmp_vinfo.vid = v; 570 err = br_vlan_info(br, p, cmd, &tmp_vinfo); 571 if (err) 572 break; 573 } 574 *vinfo_last = NULL; 575 576 return 0; 577 } 578 579 return br_vlan_info(br, p, cmd, vinfo_curr); 580 } 581 582 static int br_afspec(struct net_bridge *br, 583 struct net_bridge_port *p, 584 struct nlattr *af_spec, 585 int cmd) 586 { 587 struct bridge_vlan_info *vinfo_curr = NULL; 588 struct bridge_vlan_info *vinfo_last = NULL; 589 struct nlattr *attr; 590 struct vtunnel_info tinfo_last = {}; 591 struct vtunnel_info tinfo_curr = {}; 592 int err = 0, rem; 593 594 nla_for_each_nested(attr, af_spec, rem) { 595 err = 0; 596 switch (nla_type(attr)) { 597 case IFLA_BRIDGE_VLAN_TUNNEL_INFO: 598 if (!(p->flags & BR_VLAN_TUNNEL)) 599 return -EINVAL; 600 err = br_parse_vlan_tunnel_info(attr, &tinfo_curr); 601 if (err) 602 return err; 603 err = br_process_vlan_tunnel_info(br, p, cmd, 604 &tinfo_curr, 605 &tinfo_last); 606 if (err) 607 return err; 608 break; 609 case IFLA_BRIDGE_VLAN_INFO: 610 if (nla_len(attr) != sizeof(struct bridge_vlan_info)) 611 return -EINVAL; 612 vinfo_curr = nla_data(attr); 613 err = br_process_vlan_info(br, p, cmd, vinfo_curr, 614 &vinfo_last); 615 if (err) 616 return err; 617 break; 618 } 619 } 620 621 return err; 622 } 623 624 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = { 625 [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, 626 [IFLA_BRPORT_COST] = { .type = NLA_U32 }, 627 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, 628 [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, 629 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, 630 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, 631 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 }, 632 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, 633 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, 634 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 }, 635 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 }, 636 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 }, 637 [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 }, 638 [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 }, 639 [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 }, 640 }; 641 642 /* Change the state of the port and notify spanning tree */ 643 static int br_set_port_state(struct net_bridge_port *p, u8 state) 644 { 645 if (state > BR_STATE_BLOCKING) 646 return -EINVAL; 647 648 /* if kernel STP is running, don't allow changes */ 649 if (p->br->stp_enabled == BR_KERNEL_STP) 650 return -EBUSY; 651 652 /* if device is not up, change is not allowed 653 * if link is not present, only allowable state is disabled 654 */ 655 if (!netif_running(p->dev) || 656 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED)) 657 return -ENETDOWN; 658 659 br_set_state(p, state); 660 br_port_state_selection(p->br); 661 return 0; 662 } 663 664 /* Set/clear or port flags based on attribute */ 665 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[], 666 int attrtype, unsigned long mask) 667 { 668 if (tb[attrtype]) { 669 u8 flag = nla_get_u8(tb[attrtype]); 670 if (flag) 671 p->flags |= mask; 672 else 673 p->flags &= ~mask; 674 } 675 } 676 677 /* Process bridge protocol info on port */ 678 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[]) 679 { 680 unsigned long old_flags = p->flags; 681 bool br_vlan_tunnel_old = false; 682 int err; 683 684 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE); 685 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD); 686 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE); 687 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK); 688 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING); 689 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD); 690 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD); 691 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST); 692 br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD); 693 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP); 694 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI); 695 696 br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false; 697 br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL); 698 if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL)) 699 nbp_vlan_tunnel_info_flush(p); 700 701 if (tb[IFLA_BRPORT_COST]) { 702 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST])); 703 if (err) 704 return err; 705 } 706 707 if (tb[IFLA_BRPORT_PRIORITY]) { 708 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY])); 709 if (err) 710 return err; 711 } 712 713 if (tb[IFLA_BRPORT_STATE]) { 714 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE])); 715 if (err) 716 return err; 717 } 718 719 if (tb[IFLA_BRPORT_FLUSH]) 720 br_fdb_delete_by_port(p->br, p, 0, 0); 721 722 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 723 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) { 724 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]); 725 726 err = br_multicast_set_port_router(p, mcast_router); 727 if (err) 728 return err; 729 } 730 #endif 731 br_port_flags_change(p, old_flags ^ p->flags); 732 return 0; 733 } 734 735 /* Change state and parameters on port. */ 736 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 737 { 738 struct nlattr *protinfo; 739 struct nlattr *afspec; 740 struct net_bridge_port *p; 741 struct nlattr *tb[IFLA_BRPORT_MAX + 1]; 742 int err = 0; 743 744 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO); 745 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 746 if (!protinfo && !afspec) 747 return 0; 748 749 p = br_port_get_rtnl(dev); 750 /* We want to accept dev as bridge itself if the AF_SPEC 751 * is set to see if someone is setting vlan info on the bridge 752 */ 753 if (!p && !afspec) 754 return -EINVAL; 755 756 if (p && protinfo) { 757 if (protinfo->nla_type & NLA_F_NESTED) { 758 err = nla_parse_nested(tb, IFLA_BRPORT_MAX, protinfo, 759 br_port_policy, NULL); 760 if (err) 761 return err; 762 763 spin_lock_bh(&p->br->lock); 764 err = br_setport(p, tb); 765 spin_unlock_bh(&p->br->lock); 766 } else { 767 /* Binary compatibility with old RSTP */ 768 if (nla_len(protinfo) < sizeof(u8)) 769 return -EINVAL; 770 771 spin_lock_bh(&p->br->lock); 772 err = br_set_port_state(p, nla_get_u8(protinfo)); 773 spin_unlock_bh(&p->br->lock); 774 } 775 if (err) 776 goto out; 777 } 778 779 if (afspec) { 780 err = br_afspec((struct net_bridge *)netdev_priv(dev), p, 781 afspec, RTM_SETLINK); 782 } 783 784 if (err == 0) 785 br_ifinfo_notify(RTM_NEWLINK, p); 786 out: 787 return err; 788 } 789 790 /* Delete port information */ 791 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 792 { 793 struct nlattr *afspec; 794 struct net_bridge_port *p; 795 int err = 0; 796 797 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 798 if (!afspec) 799 return 0; 800 801 p = br_port_get_rtnl(dev); 802 /* We want to accept dev as bridge itself as well */ 803 if (!p && !(dev->priv_flags & IFF_EBRIDGE)) 804 return -EINVAL; 805 806 err = br_afspec((struct net_bridge *)netdev_priv(dev), p, 807 afspec, RTM_DELLINK); 808 if (err == 0) 809 /* Send RTM_NEWLINK because userspace 810 * expects RTM_NEWLINK for vlan dels 811 */ 812 br_ifinfo_notify(RTM_NEWLINK, p); 813 814 return err; 815 } 816 static int br_validate(struct nlattr *tb[], struct nlattr *data[]) 817 { 818 if (tb[IFLA_ADDRESS]) { 819 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 820 return -EINVAL; 821 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 822 return -EADDRNOTAVAIL; 823 } 824 825 if (!data) 826 return 0; 827 828 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 829 if (data[IFLA_BR_VLAN_PROTOCOL]) { 830 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) { 831 case htons(ETH_P_8021Q): 832 case htons(ETH_P_8021AD): 833 break; 834 default: 835 return -EPROTONOSUPPORT; 836 } 837 } 838 #endif 839 840 return 0; 841 } 842 843 static int br_port_slave_changelink(struct net_device *brdev, 844 struct net_device *dev, 845 struct nlattr *tb[], 846 struct nlattr *data[]) 847 { 848 struct net_bridge *br = netdev_priv(brdev); 849 int ret; 850 851 if (!data) 852 return 0; 853 854 spin_lock_bh(&br->lock); 855 ret = br_setport(br_port_get_rtnl(dev), data); 856 spin_unlock_bh(&br->lock); 857 858 return ret; 859 } 860 861 static int br_port_fill_slave_info(struct sk_buff *skb, 862 const struct net_device *brdev, 863 const struct net_device *dev) 864 { 865 return br_port_fill_attrs(skb, br_port_get_rtnl(dev)); 866 } 867 868 static size_t br_port_get_slave_size(const struct net_device *brdev, 869 const struct net_device *dev) 870 { 871 return br_port_info_size(); 872 } 873 874 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = { 875 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 }, 876 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 }, 877 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 }, 878 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 }, 879 [IFLA_BR_STP_STATE] = { .type = NLA_U32 }, 880 [IFLA_BR_PRIORITY] = { .type = NLA_U16 }, 881 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 }, 882 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 }, 883 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 }, 884 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY, 885 .len = ETH_ALEN }, 886 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 }, 887 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 }, 888 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 }, 889 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 }, 890 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 }, 891 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 }, 892 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 }, 893 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 }, 894 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 }, 895 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 }, 896 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 }, 897 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 }, 898 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 }, 899 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 }, 900 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 }, 901 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 }, 902 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 }, 903 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 }, 904 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 }, 905 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 }, 906 [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 }, 907 [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 }, 908 }; 909 910 static int br_changelink(struct net_device *brdev, struct nlattr *tb[], 911 struct nlattr *data[]) 912 { 913 struct net_bridge *br = netdev_priv(brdev); 914 int err; 915 916 if (!data) 917 return 0; 918 919 if (data[IFLA_BR_FORWARD_DELAY]) { 920 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY])); 921 if (err) 922 return err; 923 } 924 925 if (data[IFLA_BR_HELLO_TIME]) { 926 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME])); 927 if (err) 928 return err; 929 } 930 931 if (data[IFLA_BR_MAX_AGE]) { 932 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE])); 933 if (err) 934 return err; 935 } 936 937 if (data[IFLA_BR_AGEING_TIME]) { 938 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME])); 939 if (err) 940 return err; 941 } 942 943 if (data[IFLA_BR_STP_STATE]) { 944 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]); 945 946 br_stp_set_enabled(br, stp_enabled); 947 } 948 949 if (data[IFLA_BR_PRIORITY]) { 950 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]); 951 952 br_stp_set_bridge_priority(br, priority); 953 } 954 955 if (data[IFLA_BR_VLAN_FILTERING]) { 956 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]); 957 958 err = __br_vlan_filter_toggle(br, vlan_filter); 959 if (err) 960 return err; 961 } 962 963 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 964 if (data[IFLA_BR_VLAN_PROTOCOL]) { 965 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]); 966 967 err = __br_vlan_set_proto(br, vlan_proto); 968 if (err) 969 return err; 970 } 971 972 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { 973 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); 974 975 err = __br_vlan_set_default_pvid(br, defpvid); 976 if (err) 977 return err; 978 } 979 980 if (data[IFLA_BR_VLAN_STATS_ENABLED]) { 981 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]); 982 983 err = br_vlan_set_stats(br, vlan_stats); 984 if (err) 985 return err; 986 } 987 #endif 988 989 if (data[IFLA_BR_GROUP_FWD_MASK]) { 990 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]); 991 992 if (fwd_mask & BR_GROUPFWD_RESTRICTED) 993 return -EINVAL; 994 br->group_fwd_mask = fwd_mask; 995 } 996 997 if (data[IFLA_BR_GROUP_ADDR]) { 998 u8 new_addr[ETH_ALEN]; 999 1000 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN) 1001 return -EINVAL; 1002 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN); 1003 if (!is_link_local_ether_addr(new_addr)) 1004 return -EINVAL; 1005 if (new_addr[5] == 1 || /* 802.3x Pause address */ 1006 new_addr[5] == 2 || /* 802.3ad Slow protocols */ 1007 new_addr[5] == 3) /* 802.1X PAE address */ 1008 return -EINVAL; 1009 spin_lock_bh(&br->lock); 1010 memcpy(br->group_addr, new_addr, sizeof(br->group_addr)); 1011 spin_unlock_bh(&br->lock); 1012 br->group_addr_set = true; 1013 br_recalculate_fwd_mask(br); 1014 } 1015 1016 if (data[IFLA_BR_FDB_FLUSH]) 1017 br_fdb_flush(br); 1018 1019 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1020 if (data[IFLA_BR_MCAST_ROUTER]) { 1021 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]); 1022 1023 err = br_multicast_set_router(br, multicast_router); 1024 if (err) 1025 return err; 1026 } 1027 1028 if (data[IFLA_BR_MCAST_SNOOPING]) { 1029 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]); 1030 1031 err = br_multicast_toggle(br, mcast_snooping); 1032 if (err) 1033 return err; 1034 } 1035 1036 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) { 1037 u8 val; 1038 1039 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]); 1040 br->multicast_query_use_ifaddr = !!val; 1041 } 1042 1043 if (data[IFLA_BR_MCAST_QUERIER]) { 1044 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]); 1045 1046 err = br_multicast_set_querier(br, mcast_querier); 1047 if (err) 1048 return err; 1049 } 1050 1051 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) { 1052 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]); 1053 1054 br->hash_elasticity = val; 1055 } 1056 1057 if (data[IFLA_BR_MCAST_HASH_MAX]) { 1058 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]); 1059 1060 err = br_multicast_set_hash_max(br, hash_max); 1061 if (err) 1062 return err; 1063 } 1064 1065 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) { 1066 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]); 1067 1068 br->multicast_last_member_count = val; 1069 } 1070 1071 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) { 1072 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]); 1073 1074 br->multicast_startup_query_count = val; 1075 } 1076 1077 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) { 1078 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]); 1079 1080 br->multicast_last_member_interval = clock_t_to_jiffies(val); 1081 } 1082 1083 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) { 1084 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]); 1085 1086 br->multicast_membership_interval = clock_t_to_jiffies(val); 1087 } 1088 1089 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) { 1090 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]); 1091 1092 br->multicast_querier_interval = clock_t_to_jiffies(val); 1093 } 1094 1095 if (data[IFLA_BR_MCAST_QUERY_INTVL]) { 1096 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]); 1097 1098 br->multicast_query_interval = clock_t_to_jiffies(val); 1099 } 1100 1101 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) { 1102 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]); 1103 1104 br->multicast_query_response_interval = clock_t_to_jiffies(val); 1105 } 1106 1107 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) { 1108 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]); 1109 1110 br->multicast_startup_query_interval = clock_t_to_jiffies(val); 1111 } 1112 1113 if (data[IFLA_BR_MCAST_STATS_ENABLED]) { 1114 __u8 mcast_stats; 1115 1116 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]); 1117 br->multicast_stats_enabled = !!mcast_stats; 1118 } 1119 1120 if (data[IFLA_BR_MCAST_IGMP_VERSION]) { 1121 __u8 igmp_version; 1122 1123 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]); 1124 err = br_multicast_set_igmp_version(br, igmp_version); 1125 if (err) 1126 return err; 1127 } 1128 1129 #if IS_ENABLED(CONFIG_IPV6) 1130 if (data[IFLA_BR_MCAST_MLD_VERSION]) { 1131 __u8 mld_version; 1132 1133 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]); 1134 err = br_multicast_set_mld_version(br, mld_version); 1135 if (err) 1136 return err; 1137 } 1138 #endif 1139 #endif 1140 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1141 if (data[IFLA_BR_NF_CALL_IPTABLES]) { 1142 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]); 1143 1144 br->nf_call_iptables = val ? true : false; 1145 } 1146 1147 if (data[IFLA_BR_NF_CALL_IP6TABLES]) { 1148 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]); 1149 1150 br->nf_call_ip6tables = val ? true : false; 1151 } 1152 1153 if (data[IFLA_BR_NF_CALL_ARPTABLES]) { 1154 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]); 1155 1156 br->nf_call_arptables = val ? true : false; 1157 } 1158 #endif 1159 1160 return 0; 1161 } 1162 1163 static int br_dev_newlink(struct net *src_net, struct net_device *dev, 1164 struct nlattr *tb[], struct nlattr *data[]) 1165 { 1166 struct net_bridge *br = netdev_priv(dev); 1167 int err; 1168 1169 if (tb[IFLA_ADDRESS]) { 1170 spin_lock_bh(&br->lock); 1171 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS])); 1172 spin_unlock_bh(&br->lock); 1173 } 1174 1175 err = register_netdevice(dev); 1176 if (err) 1177 return err; 1178 1179 err = br_changelink(dev, tb, data); 1180 if (err) 1181 unregister_netdevice(dev); 1182 return err; 1183 } 1184 1185 static size_t br_get_size(const struct net_device *brdev) 1186 { 1187 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */ 1188 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */ 1189 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */ 1190 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */ 1191 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */ 1192 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */ 1193 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */ 1194 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1195 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */ 1196 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */ 1197 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */ 1198 #endif 1199 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */ 1200 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */ 1201 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */ 1202 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */ 1203 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */ 1204 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */ 1205 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */ 1206 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */ 1207 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */ 1208 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */ 1209 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */ 1210 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */ 1211 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1212 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */ 1213 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */ 1214 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */ 1215 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */ 1216 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */ 1217 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */ 1218 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */ 1219 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */ 1220 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */ 1221 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */ 1222 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */ 1223 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */ 1224 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */ 1225 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */ 1226 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */ 1227 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */ 1228 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */ 1229 #endif 1230 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1231 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */ 1232 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */ 1233 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */ 1234 #endif 1235 0; 1236 } 1237 1238 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev) 1239 { 1240 struct net_bridge *br = netdev_priv(brdev); 1241 u32 forward_delay = jiffies_to_clock_t(br->forward_delay); 1242 u32 hello_time = jiffies_to_clock_t(br->hello_time); 1243 u32 age_time = jiffies_to_clock_t(br->max_age); 1244 u32 ageing_time = jiffies_to_clock_t(br->ageing_time); 1245 u32 stp_enabled = br->stp_enabled; 1246 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]; 1247 u8 vlan_enabled = br_vlan_enabled(br); 1248 u64 clockval; 1249 1250 clockval = br_timer_value(&br->hello_timer); 1251 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD)) 1252 return -EMSGSIZE; 1253 clockval = br_timer_value(&br->tcn_timer); 1254 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD)) 1255 return -EMSGSIZE; 1256 clockval = br_timer_value(&br->topology_change_timer); 1257 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval, 1258 IFLA_BR_PAD)) 1259 return -EMSGSIZE; 1260 clockval = br_timer_value(&br->gc_work.timer); 1261 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD)) 1262 return -EMSGSIZE; 1263 1264 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) || 1265 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) || 1266 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) || 1267 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) || 1268 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) || 1269 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) || 1270 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) || 1271 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) || 1272 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id), 1273 &br->bridge_id) || 1274 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id), 1275 &br->designated_root) || 1276 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) || 1277 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) || 1278 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) || 1279 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED, 1280 br->topology_change_detected) || 1281 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr)) 1282 return -EMSGSIZE; 1283 1284 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1285 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) || 1286 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) || 1287 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled)) 1288 return -EMSGSIZE; 1289 #endif 1290 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1291 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) || 1292 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) || 1293 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR, 1294 br->multicast_query_use_ifaddr) || 1295 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) || 1296 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED, 1297 br->multicast_stats_enabled) || 1298 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, 1299 br->hash_elasticity) || 1300 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) || 1301 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT, 1302 br->multicast_last_member_count) || 1303 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT, 1304 br->multicast_startup_query_count) || 1305 nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION, 1306 br->multicast_igmp_version)) 1307 return -EMSGSIZE; 1308 #if IS_ENABLED(CONFIG_IPV6) 1309 if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION, 1310 br->multicast_mld_version)) 1311 return -EMSGSIZE; 1312 #endif 1313 clockval = jiffies_to_clock_t(br->multicast_last_member_interval); 1314 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval, 1315 IFLA_BR_PAD)) 1316 return -EMSGSIZE; 1317 clockval = jiffies_to_clock_t(br->multicast_membership_interval); 1318 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval, 1319 IFLA_BR_PAD)) 1320 return -EMSGSIZE; 1321 clockval = jiffies_to_clock_t(br->multicast_querier_interval); 1322 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval, 1323 IFLA_BR_PAD)) 1324 return -EMSGSIZE; 1325 clockval = jiffies_to_clock_t(br->multicast_query_interval); 1326 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval, 1327 IFLA_BR_PAD)) 1328 return -EMSGSIZE; 1329 clockval = jiffies_to_clock_t(br->multicast_query_response_interval); 1330 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval, 1331 IFLA_BR_PAD)) 1332 return -EMSGSIZE; 1333 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval); 1334 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval, 1335 IFLA_BR_PAD)) 1336 return -EMSGSIZE; 1337 #endif 1338 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1339 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES, 1340 br->nf_call_iptables ? 1 : 0) || 1341 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES, 1342 br->nf_call_ip6tables ? 1 : 0) || 1343 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES, 1344 br->nf_call_arptables ? 1 : 0)) 1345 return -EMSGSIZE; 1346 #endif 1347 1348 return 0; 1349 } 1350 1351 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr) 1352 { 1353 struct net_bridge_port *p = NULL; 1354 struct net_bridge_vlan_group *vg; 1355 struct net_bridge_vlan *v; 1356 struct net_bridge *br; 1357 int numvls = 0; 1358 1359 switch (attr) { 1360 case IFLA_STATS_LINK_XSTATS: 1361 br = netdev_priv(dev); 1362 vg = br_vlan_group(br); 1363 break; 1364 case IFLA_STATS_LINK_XSTATS_SLAVE: 1365 p = br_port_get_rtnl(dev); 1366 if (!p) 1367 return 0; 1368 br = p->br; 1369 vg = nbp_vlan_group(p); 1370 break; 1371 default: 1372 return 0; 1373 } 1374 1375 if (vg) { 1376 /* we need to count all, even placeholder entries */ 1377 list_for_each_entry(v, &vg->vlan_list, vlist) 1378 numvls++; 1379 } 1380 1381 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) + 1382 nla_total_size(sizeof(struct br_mcast_stats)) + 1383 nla_total_size(0); 1384 } 1385 1386 static int br_fill_linkxstats(struct sk_buff *skb, 1387 const struct net_device *dev, 1388 int *prividx, int attr) 1389 { 1390 struct nlattr *nla __maybe_unused; 1391 struct net_bridge_port *p = NULL; 1392 struct net_bridge_vlan_group *vg; 1393 struct net_bridge_vlan *v; 1394 struct net_bridge *br; 1395 struct nlattr *nest; 1396 int vl_idx = 0; 1397 1398 switch (attr) { 1399 case IFLA_STATS_LINK_XSTATS: 1400 br = netdev_priv(dev); 1401 vg = br_vlan_group(br); 1402 break; 1403 case IFLA_STATS_LINK_XSTATS_SLAVE: 1404 p = br_port_get_rtnl(dev); 1405 if (!p) 1406 return 0; 1407 br = p->br; 1408 vg = nbp_vlan_group(p); 1409 break; 1410 default: 1411 return -EINVAL; 1412 } 1413 1414 nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE); 1415 if (!nest) 1416 return -EMSGSIZE; 1417 1418 if (vg) { 1419 u16 pvid; 1420 1421 pvid = br_get_pvid(vg); 1422 list_for_each_entry(v, &vg->vlan_list, vlist) { 1423 struct bridge_vlan_xstats vxi; 1424 struct br_vlan_stats stats; 1425 1426 if (++vl_idx < *prividx) 1427 continue; 1428 memset(&vxi, 0, sizeof(vxi)); 1429 vxi.vid = v->vid; 1430 vxi.flags = v->flags; 1431 if (v->vid == pvid) 1432 vxi.flags |= BRIDGE_VLAN_INFO_PVID; 1433 br_vlan_get_stats(v, &stats); 1434 vxi.rx_bytes = stats.rx_bytes; 1435 vxi.rx_packets = stats.rx_packets; 1436 vxi.tx_bytes = stats.tx_bytes; 1437 vxi.tx_packets = stats.tx_packets; 1438 1439 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi)) 1440 goto nla_put_failure; 1441 } 1442 } 1443 1444 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1445 if (++vl_idx >= *prividx) { 1446 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST, 1447 sizeof(struct br_mcast_stats), 1448 BRIDGE_XSTATS_PAD); 1449 if (!nla) 1450 goto nla_put_failure; 1451 br_multicast_get_stats(br, p, nla_data(nla)); 1452 } 1453 #endif 1454 nla_nest_end(skb, nest); 1455 *prividx = 0; 1456 1457 return 0; 1458 1459 nla_put_failure: 1460 nla_nest_end(skb, nest); 1461 *prividx = vl_idx; 1462 1463 return -EMSGSIZE; 1464 } 1465 1466 static struct rtnl_af_ops br_af_ops __read_mostly = { 1467 .family = AF_BRIDGE, 1468 .get_link_af_size = br_get_link_af_size_filtered, 1469 }; 1470 1471 struct rtnl_link_ops br_link_ops __read_mostly = { 1472 .kind = "bridge", 1473 .priv_size = sizeof(struct net_bridge), 1474 .setup = br_dev_setup, 1475 .maxtype = IFLA_BR_MAX, 1476 .policy = br_policy, 1477 .validate = br_validate, 1478 .newlink = br_dev_newlink, 1479 .changelink = br_changelink, 1480 .dellink = br_dev_delete, 1481 .get_size = br_get_size, 1482 .fill_info = br_fill_info, 1483 .fill_linkxstats = br_fill_linkxstats, 1484 .get_linkxstats_size = br_get_linkxstats_size, 1485 1486 .slave_maxtype = IFLA_BRPORT_MAX, 1487 .slave_policy = br_port_policy, 1488 .slave_changelink = br_port_slave_changelink, 1489 .get_slave_size = br_port_get_slave_size, 1490 .fill_slave_info = br_port_fill_slave_info, 1491 }; 1492 1493 int __init br_netlink_init(void) 1494 { 1495 int err; 1496 1497 br_mdb_init(); 1498 rtnl_af_register(&br_af_ops); 1499 1500 err = rtnl_link_register(&br_link_ops); 1501 if (err) 1502 goto out_af; 1503 1504 return 0; 1505 1506 out_af: 1507 rtnl_af_unregister(&br_af_ops); 1508 br_mdb_uninit(); 1509 return err; 1510 } 1511 1512 void br_netlink_fini(void) 1513 { 1514 br_mdb_uninit(); 1515 rtnl_af_unregister(&br_af_ops); 1516 rtnl_link_unregister(&br_link_ops); 1517 } 1518