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(1) /* IFLA_BRPORT_NEIGH_SUPPRESS */ 142 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */ 143 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */ 144 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */ 145 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */ 146 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */ 147 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */ 148 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */ 149 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */ 150 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */ 151 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */ 152 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */ 153 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 154 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */ 155 #endif 156 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_GROUP_FWD_MASK */ 157 + 0; 158 } 159 160 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask) 161 { 162 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 163 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 164 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 165 + nla_total_size(4) /* IFLA_MASTER */ 166 + nla_total_size(4) /* IFLA_MTU */ 167 + nla_total_size(4) /* IFLA_LINK */ 168 + nla_total_size(1) /* IFLA_OPERSTATE */ 169 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */ 170 + nla_total_size(br_get_link_af_size_filtered(dev, 171 filter_mask)); /* IFLA_AF_SPEC */ 172 } 173 174 static int br_port_fill_attrs(struct sk_buff *skb, 175 const struct net_bridge_port *p) 176 { 177 u8 mode = !!(p->flags & BR_HAIRPIN_MODE); 178 u64 timerval; 179 180 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) || 181 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) || 182 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) || 183 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) || 184 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) || 185 nla_put_u8(skb, IFLA_BRPORT_PROTECT, 186 !!(p->flags & BR_ROOT_BLOCK)) || 187 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, 188 !!(p->flags & BR_MULTICAST_FAST_LEAVE)) || 189 nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST, 190 !!(p->flags & BR_MULTICAST_TO_UNICAST)) || 191 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) || 192 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, 193 !!(p->flags & BR_FLOOD)) || 194 nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD, 195 !!(p->flags & BR_MCAST_FLOOD)) || 196 nla_put_u8(skb, IFLA_BRPORT_BCAST_FLOOD, 197 !!(p->flags & BR_BCAST_FLOOD)) || 198 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) || 199 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI, 200 !!(p->flags & BR_PROXYARP_WIFI)) || 201 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id), 202 &p->designated_root) || 203 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id), 204 &p->designated_bridge) || 205 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) || 206 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) || 207 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) || 208 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) || 209 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK, 210 p->topology_change_ack) || 211 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending) || 212 nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags & 213 BR_VLAN_TUNNEL)) || 214 nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) || 215 nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS, 216 !!(p->flags & BR_NEIGH_SUPPRESS))) 217 return -EMSGSIZE; 218 219 timerval = br_timer_value(&p->message_age_timer); 220 if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval, 221 IFLA_BRPORT_PAD)) 222 return -EMSGSIZE; 223 timerval = br_timer_value(&p->forward_delay_timer); 224 if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval, 225 IFLA_BRPORT_PAD)) 226 return -EMSGSIZE; 227 timerval = br_timer_value(&p->hold_timer); 228 if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval, 229 IFLA_BRPORT_PAD)) 230 return -EMSGSIZE; 231 232 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 233 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER, 234 p->multicast_router)) 235 return -EMSGSIZE; 236 #endif 237 238 return 0; 239 } 240 241 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start, 242 u16 vid_end, u16 flags) 243 { 244 struct bridge_vlan_info vinfo; 245 246 if ((vid_end - vid_start) > 0) { 247 /* add range to skb */ 248 vinfo.vid = vid_start; 249 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN; 250 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 251 sizeof(vinfo), &vinfo)) 252 goto nla_put_failure; 253 254 vinfo.vid = vid_end; 255 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END; 256 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 257 sizeof(vinfo), &vinfo)) 258 goto nla_put_failure; 259 } else { 260 vinfo.vid = vid_start; 261 vinfo.flags = flags; 262 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 263 sizeof(vinfo), &vinfo)) 264 goto nla_put_failure; 265 } 266 267 return 0; 268 269 nla_put_failure: 270 return -EMSGSIZE; 271 } 272 273 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb, 274 struct net_bridge_vlan_group *vg) 275 { 276 struct net_bridge_vlan *v; 277 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0; 278 u16 flags, pvid; 279 int err = 0; 280 281 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan 282 * and mark vlan info with begin and end flags 283 * if vlaninfo represents a range 284 */ 285 pvid = br_get_pvid(vg); 286 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 287 flags = 0; 288 if (!br_vlan_should_use(v)) 289 continue; 290 if (v->vid == pvid) 291 flags |= BRIDGE_VLAN_INFO_PVID; 292 293 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 294 flags |= BRIDGE_VLAN_INFO_UNTAGGED; 295 296 if (vid_range_start == 0) { 297 goto initvars; 298 } else if ((v->vid - vid_range_end) == 1 && 299 flags == vid_range_flags) { 300 vid_range_end = v->vid; 301 continue; 302 } else { 303 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 304 vid_range_end, 305 vid_range_flags); 306 if (err) 307 return err; 308 } 309 310 initvars: 311 vid_range_start = v->vid; 312 vid_range_end = v->vid; 313 vid_range_flags = flags; 314 } 315 316 if (vid_range_start != 0) { 317 /* Call it once more to send any left over vlans */ 318 err = br_fill_ifvlaninfo_range(skb, vid_range_start, 319 vid_range_end, 320 vid_range_flags); 321 if (err) 322 return err; 323 } 324 325 return 0; 326 } 327 328 static int br_fill_ifvlaninfo(struct sk_buff *skb, 329 struct net_bridge_vlan_group *vg) 330 { 331 struct bridge_vlan_info vinfo; 332 struct net_bridge_vlan *v; 333 u16 pvid; 334 335 pvid = br_get_pvid(vg); 336 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 337 if (!br_vlan_should_use(v)) 338 continue; 339 340 vinfo.vid = v->vid; 341 vinfo.flags = 0; 342 if (v->vid == pvid) 343 vinfo.flags |= BRIDGE_VLAN_INFO_PVID; 344 345 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 346 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 347 348 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, 349 sizeof(vinfo), &vinfo)) 350 goto nla_put_failure; 351 } 352 353 return 0; 354 355 nla_put_failure: 356 return -EMSGSIZE; 357 } 358 359 /* 360 * Create one netlink message for one interface 361 * Contains port and master info as well as carrier and bridge state. 362 */ 363 static int br_fill_ifinfo(struct sk_buff *skb, 364 const struct net_bridge_port *port, 365 u32 pid, u32 seq, int event, unsigned int flags, 366 u32 filter_mask, const struct net_device *dev) 367 { 368 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 369 struct net_bridge *br; 370 struct ifinfomsg *hdr; 371 struct nlmsghdr *nlh; 372 373 if (port) 374 br = port->br; 375 else 376 br = netdev_priv(dev); 377 378 br_debug(br, "br_fill_info event %d port %s master %s\n", 379 event, dev->name, br->dev->name); 380 381 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); 382 if (nlh == NULL) 383 return -EMSGSIZE; 384 385 hdr = nlmsg_data(nlh); 386 hdr->ifi_family = AF_BRIDGE; 387 hdr->__ifi_pad = 0; 388 hdr->ifi_type = dev->type; 389 hdr->ifi_index = dev->ifindex; 390 hdr->ifi_flags = dev_get_flags(dev); 391 hdr->ifi_change = 0; 392 393 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 394 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) || 395 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 396 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 397 (dev->addr_len && 398 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 399 (dev->ifindex != dev_get_iflink(dev) && 400 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 401 goto nla_put_failure; 402 403 if (event == RTM_NEWLINK && port) { 404 struct nlattr *nest 405 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 406 407 if (nest == NULL || br_port_fill_attrs(skb, port) < 0) 408 goto nla_put_failure; 409 nla_nest_end(skb, nest); 410 } 411 412 /* Check if the VID information is requested */ 413 if ((filter_mask & RTEXT_FILTER_BRVLAN) || 414 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { 415 struct net_bridge_vlan_group *vg; 416 struct nlattr *af; 417 int err; 418 419 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */ 420 rcu_read_lock(); 421 if (port) 422 vg = nbp_vlan_group_rcu(port); 423 else 424 vg = br_vlan_group_rcu(br); 425 426 if (!vg || !vg->num_vlans) { 427 rcu_read_unlock(); 428 goto done; 429 } 430 af = nla_nest_start(skb, IFLA_AF_SPEC); 431 if (!af) { 432 rcu_read_unlock(); 433 goto nla_put_failure; 434 } 435 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) 436 err = br_fill_ifvlaninfo_compressed(skb, vg); 437 else 438 err = br_fill_ifvlaninfo(skb, vg); 439 440 if (port && (port->flags & BR_VLAN_TUNNEL)) 441 err = br_fill_vlan_tunnel_info(skb, vg); 442 rcu_read_unlock(); 443 if (err) 444 goto nla_put_failure; 445 nla_nest_end(skb, af); 446 } 447 448 done: 449 nlmsg_end(skb, nlh); 450 return 0; 451 452 nla_put_failure: 453 nlmsg_cancel(skb, nlh); 454 return -EMSGSIZE; 455 } 456 457 /* Notify listeners of a change in bridge or port information */ 458 void br_ifinfo_notify(int event, const struct net_bridge *br, 459 const struct net_bridge_port *port) 460 { 461 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED; 462 struct net_device *dev; 463 struct sk_buff *skb; 464 int err = -ENOBUFS; 465 struct net *net; 466 u16 port_no = 0; 467 468 if (WARN_ON(!port && !br)) 469 return; 470 471 if (port) { 472 dev = port->dev; 473 br = port->br; 474 port_no = port->port_no; 475 } else { 476 dev = br->dev; 477 } 478 479 net = dev_net(dev); 480 br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event); 481 482 skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC); 483 if (skb == NULL) 484 goto errout; 485 486 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, dev); 487 if (err < 0) { 488 /* -EMSGSIZE implies BUG in br_nlmsg_size() */ 489 WARN_ON(err == -EMSGSIZE); 490 kfree_skb(skb); 491 goto errout; 492 } 493 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 494 return; 495 errout: 496 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 497 } 498 499 /* 500 * Dump information about all ports, in response to GETLINK 501 */ 502 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 503 struct net_device *dev, u32 filter_mask, int nlflags) 504 { 505 struct net_bridge_port *port = br_port_get_rtnl(dev); 506 507 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) && 508 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) 509 return 0; 510 511 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags, 512 filter_mask, dev); 513 } 514 515 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p, 516 int cmd, struct bridge_vlan_info *vinfo, bool *changed) 517 { 518 bool curr_change; 519 int err = 0; 520 521 switch (cmd) { 522 case RTM_SETLINK: 523 if (p) { 524 /* if the MASTER flag is set this will act on the global 525 * per-VLAN entry as well 526 */ 527 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags, 528 &curr_change); 529 } else { 530 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY; 531 err = br_vlan_add(br, vinfo->vid, vinfo->flags, 532 &curr_change); 533 } 534 if (curr_change) 535 *changed = true; 536 break; 537 538 case RTM_DELLINK: 539 if (p) { 540 if (!nbp_vlan_delete(p, vinfo->vid)) 541 *changed = true; 542 543 if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) && 544 !br_vlan_delete(p->br, vinfo->vid)) 545 *changed = true; 546 } else if (!br_vlan_delete(br, vinfo->vid)) { 547 *changed = true; 548 } 549 break; 550 } 551 552 return err; 553 } 554 555 static int br_process_vlan_info(struct net_bridge *br, 556 struct net_bridge_port *p, int cmd, 557 struct bridge_vlan_info *vinfo_curr, 558 struct bridge_vlan_info **vinfo_last, 559 bool *changed) 560 { 561 if (!vinfo_curr->vid || vinfo_curr->vid >= VLAN_VID_MASK) 562 return -EINVAL; 563 564 if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 565 /* check if we are already processing a range */ 566 if (*vinfo_last) 567 return -EINVAL; 568 *vinfo_last = vinfo_curr; 569 /* don't allow range of pvids */ 570 if ((*vinfo_last)->flags & BRIDGE_VLAN_INFO_PVID) 571 return -EINVAL; 572 return 0; 573 } 574 575 if (*vinfo_last) { 576 struct bridge_vlan_info tmp_vinfo; 577 int v, err; 578 579 if (!(vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END)) 580 return -EINVAL; 581 582 if (vinfo_curr->vid <= (*vinfo_last)->vid) 583 return -EINVAL; 584 585 memcpy(&tmp_vinfo, *vinfo_last, 586 sizeof(struct bridge_vlan_info)); 587 for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) { 588 tmp_vinfo.vid = v; 589 err = br_vlan_info(br, p, cmd, &tmp_vinfo, changed); 590 if (err) 591 break; 592 } 593 *vinfo_last = NULL; 594 595 return err; 596 } 597 598 return br_vlan_info(br, p, cmd, vinfo_curr, changed); 599 } 600 601 static int br_afspec(struct net_bridge *br, 602 struct net_bridge_port *p, 603 struct nlattr *af_spec, 604 int cmd, bool *changed) 605 { 606 struct bridge_vlan_info *vinfo_curr = NULL; 607 struct bridge_vlan_info *vinfo_last = NULL; 608 struct nlattr *attr; 609 struct vtunnel_info tinfo_last = {}; 610 struct vtunnel_info tinfo_curr = {}; 611 int err = 0, rem; 612 613 nla_for_each_nested(attr, af_spec, rem) { 614 err = 0; 615 switch (nla_type(attr)) { 616 case IFLA_BRIDGE_VLAN_TUNNEL_INFO: 617 if (!p || !(p->flags & BR_VLAN_TUNNEL)) 618 return -EINVAL; 619 err = br_parse_vlan_tunnel_info(attr, &tinfo_curr); 620 if (err) 621 return err; 622 err = br_process_vlan_tunnel_info(br, p, cmd, 623 &tinfo_curr, 624 &tinfo_last, 625 changed); 626 if (err) 627 return err; 628 break; 629 case IFLA_BRIDGE_VLAN_INFO: 630 if (nla_len(attr) != sizeof(struct bridge_vlan_info)) 631 return -EINVAL; 632 vinfo_curr = nla_data(attr); 633 err = br_process_vlan_info(br, p, cmd, vinfo_curr, 634 &vinfo_last, changed); 635 if (err) 636 return err; 637 break; 638 } 639 } 640 641 return err; 642 } 643 644 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = { 645 [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, 646 [IFLA_BRPORT_COST] = { .type = NLA_U32 }, 647 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, 648 [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, 649 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, 650 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, 651 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 }, 652 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, 653 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, 654 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 }, 655 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 }, 656 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 }, 657 [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 }, 658 [IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 }, 659 [IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 }, 660 [IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 }, 661 [IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 }, 662 [IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 }, 663 }; 664 665 /* Change the state of the port and notify spanning tree */ 666 static int br_set_port_state(struct net_bridge_port *p, u8 state) 667 { 668 if (state > BR_STATE_BLOCKING) 669 return -EINVAL; 670 671 /* if kernel STP is running, don't allow changes */ 672 if (p->br->stp_enabled == BR_KERNEL_STP) 673 return -EBUSY; 674 675 /* if device is not up, change is not allowed 676 * if link is not present, only allowable state is disabled 677 */ 678 if (!netif_running(p->dev) || 679 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED)) 680 return -ENETDOWN; 681 682 br_set_state(p, state); 683 br_port_state_selection(p->br); 684 return 0; 685 } 686 687 /* Set/clear or port flags based on attribute */ 688 static int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[], 689 int attrtype, unsigned long mask) 690 { 691 unsigned long flags; 692 int err; 693 694 if (!tb[attrtype]) 695 return 0; 696 697 if (nla_get_u8(tb[attrtype])) 698 flags = p->flags | mask; 699 else 700 flags = p->flags & ~mask; 701 702 err = br_switchdev_set_port_flag(p, flags, mask); 703 if (err) 704 return err; 705 706 p->flags = flags; 707 return 0; 708 } 709 710 /* Process bridge protocol info on port */ 711 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[]) 712 { 713 unsigned long old_flags = p->flags; 714 bool br_vlan_tunnel_old = false; 715 int err; 716 717 err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE); 718 if (err) 719 return err; 720 721 err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD); 722 if (err) 723 return err; 724 725 err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE); 726 if (err) 727 return err; 728 729 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK); 730 if (err) 731 return err; 732 733 err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING); 734 if (err) 735 return err; 736 737 err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD); 738 if (err) 739 return err; 740 741 err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD); 742 if (err) 743 return err; 744 745 err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST); 746 if (err) 747 return err; 748 749 err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD); 750 if (err) 751 return err; 752 753 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP); 754 if (err) 755 return err; 756 757 err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI); 758 if (err) 759 return err; 760 761 br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false; 762 err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL); 763 if (err) 764 return err; 765 766 if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL)) 767 nbp_vlan_tunnel_info_flush(p); 768 769 if (tb[IFLA_BRPORT_COST]) { 770 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST])); 771 if (err) 772 return err; 773 } 774 775 if (tb[IFLA_BRPORT_PRIORITY]) { 776 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY])); 777 if (err) 778 return err; 779 } 780 781 if (tb[IFLA_BRPORT_STATE]) { 782 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE])); 783 if (err) 784 return err; 785 } 786 787 if (tb[IFLA_BRPORT_FLUSH]) 788 br_fdb_delete_by_port(p->br, p, 0, 0); 789 790 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 791 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) { 792 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]); 793 794 err = br_multicast_set_port_router(p, mcast_router); 795 if (err) 796 return err; 797 } 798 #endif 799 800 if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) { 801 u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]); 802 803 if (fwd_mask & BR_GROUPFWD_MACPAUSE) 804 return -EINVAL; 805 p->group_fwd_mask = fwd_mask; 806 } 807 808 err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS, 809 BR_NEIGH_SUPPRESS); 810 if (err) 811 return err; 812 813 br_port_flags_change(p, old_flags ^ p->flags); 814 return 0; 815 } 816 817 /* Change state and parameters on port. */ 818 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 819 { 820 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev); 821 struct nlattr *tb[IFLA_BRPORT_MAX + 1]; 822 struct net_bridge_port *p; 823 struct nlattr *protinfo; 824 struct nlattr *afspec; 825 bool changed = false; 826 int err = 0; 827 828 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO); 829 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 830 if (!protinfo && !afspec) 831 return 0; 832 833 p = br_port_get_rtnl(dev); 834 /* We want to accept dev as bridge itself if the AF_SPEC 835 * is set to see if someone is setting vlan info on the bridge 836 */ 837 if (!p && !afspec) 838 return -EINVAL; 839 840 if (p && protinfo) { 841 if (protinfo->nla_type & NLA_F_NESTED) { 842 err = nla_parse_nested(tb, IFLA_BRPORT_MAX, protinfo, 843 br_port_policy, NULL); 844 if (err) 845 return err; 846 847 spin_lock_bh(&p->br->lock); 848 err = br_setport(p, tb); 849 spin_unlock_bh(&p->br->lock); 850 } else { 851 /* Binary compatibility with old RSTP */ 852 if (nla_len(protinfo) < sizeof(u8)) 853 return -EINVAL; 854 855 spin_lock_bh(&p->br->lock); 856 err = br_set_port_state(p, nla_get_u8(protinfo)); 857 spin_unlock_bh(&p->br->lock); 858 } 859 if (err) 860 goto out; 861 changed = true; 862 } 863 864 if (afspec) 865 err = br_afspec(br, p, afspec, RTM_SETLINK, &changed); 866 867 if (changed) 868 br_ifinfo_notify(RTM_NEWLINK, br, p); 869 out: 870 return err; 871 } 872 873 /* Delete port information */ 874 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags) 875 { 876 struct net_bridge *br = (struct net_bridge *)netdev_priv(dev); 877 struct net_bridge_port *p; 878 struct nlattr *afspec; 879 bool changed = false; 880 int err = 0; 881 882 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 883 if (!afspec) 884 return 0; 885 886 p = br_port_get_rtnl(dev); 887 /* We want to accept dev as bridge itself as well */ 888 if (!p && !(dev->priv_flags & IFF_EBRIDGE)) 889 return -EINVAL; 890 891 err = br_afspec(br, p, afspec, RTM_DELLINK, &changed); 892 if (changed) 893 /* Send RTM_NEWLINK because userspace 894 * expects RTM_NEWLINK for vlan dels 895 */ 896 br_ifinfo_notify(RTM_NEWLINK, br, p); 897 898 return err; 899 } 900 901 static int br_validate(struct nlattr *tb[], struct nlattr *data[], 902 struct netlink_ext_ack *extack) 903 { 904 if (tb[IFLA_ADDRESS]) { 905 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 906 return -EINVAL; 907 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 908 return -EADDRNOTAVAIL; 909 } 910 911 if (!data) 912 return 0; 913 914 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 915 if (data[IFLA_BR_VLAN_PROTOCOL]) { 916 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) { 917 case htons(ETH_P_8021Q): 918 case htons(ETH_P_8021AD): 919 break; 920 default: 921 return -EPROTONOSUPPORT; 922 } 923 } 924 925 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { 926 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); 927 928 if (defpvid >= VLAN_VID_MASK) 929 return -EINVAL; 930 } 931 #endif 932 933 return 0; 934 } 935 936 static int br_port_slave_changelink(struct net_device *brdev, 937 struct net_device *dev, 938 struct nlattr *tb[], 939 struct nlattr *data[], 940 struct netlink_ext_ack *extack) 941 { 942 struct net_bridge *br = netdev_priv(brdev); 943 int ret; 944 945 if (!data) 946 return 0; 947 948 spin_lock_bh(&br->lock); 949 ret = br_setport(br_port_get_rtnl(dev), data); 950 spin_unlock_bh(&br->lock); 951 952 return ret; 953 } 954 955 static int br_port_fill_slave_info(struct sk_buff *skb, 956 const struct net_device *brdev, 957 const struct net_device *dev) 958 { 959 return br_port_fill_attrs(skb, br_port_get_rtnl(dev)); 960 } 961 962 static size_t br_port_get_slave_size(const struct net_device *brdev, 963 const struct net_device *dev) 964 { 965 return br_port_info_size(); 966 } 967 968 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = { 969 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 }, 970 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 }, 971 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 }, 972 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 }, 973 [IFLA_BR_STP_STATE] = { .type = NLA_U32 }, 974 [IFLA_BR_PRIORITY] = { .type = NLA_U16 }, 975 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 }, 976 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 }, 977 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 }, 978 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY, 979 .len = ETH_ALEN }, 980 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 }, 981 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 }, 982 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 }, 983 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 }, 984 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 }, 985 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 }, 986 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 }, 987 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 }, 988 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 }, 989 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 }, 990 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 }, 991 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 }, 992 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 }, 993 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 }, 994 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 }, 995 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 }, 996 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 }, 997 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 }, 998 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 }, 999 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 }, 1000 [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 }, 1001 [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 }, 1002 }; 1003 1004 static int br_changelink(struct net_device *brdev, struct nlattr *tb[], 1005 struct nlattr *data[], 1006 struct netlink_ext_ack *extack) 1007 { 1008 struct net_bridge *br = netdev_priv(brdev); 1009 int err; 1010 1011 if (!data) 1012 return 0; 1013 1014 if (data[IFLA_BR_FORWARD_DELAY]) { 1015 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY])); 1016 if (err) 1017 return err; 1018 } 1019 1020 if (data[IFLA_BR_HELLO_TIME]) { 1021 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME])); 1022 if (err) 1023 return err; 1024 } 1025 1026 if (data[IFLA_BR_MAX_AGE]) { 1027 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE])); 1028 if (err) 1029 return err; 1030 } 1031 1032 if (data[IFLA_BR_AGEING_TIME]) { 1033 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME])); 1034 if (err) 1035 return err; 1036 } 1037 1038 if (data[IFLA_BR_STP_STATE]) { 1039 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]); 1040 1041 br_stp_set_enabled(br, stp_enabled); 1042 } 1043 1044 if (data[IFLA_BR_PRIORITY]) { 1045 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]); 1046 1047 br_stp_set_bridge_priority(br, priority); 1048 } 1049 1050 if (data[IFLA_BR_VLAN_FILTERING]) { 1051 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]); 1052 1053 err = __br_vlan_filter_toggle(br, vlan_filter); 1054 if (err) 1055 return err; 1056 } 1057 1058 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1059 if (data[IFLA_BR_VLAN_PROTOCOL]) { 1060 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]); 1061 1062 err = __br_vlan_set_proto(br, vlan_proto); 1063 if (err) 1064 return err; 1065 } 1066 1067 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) { 1068 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]); 1069 1070 err = __br_vlan_set_default_pvid(br, defpvid); 1071 if (err) 1072 return err; 1073 } 1074 1075 if (data[IFLA_BR_VLAN_STATS_ENABLED]) { 1076 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]); 1077 1078 err = br_vlan_set_stats(br, vlan_stats); 1079 if (err) 1080 return err; 1081 } 1082 #endif 1083 1084 if (data[IFLA_BR_GROUP_FWD_MASK]) { 1085 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]); 1086 1087 if (fwd_mask & BR_GROUPFWD_RESTRICTED) 1088 return -EINVAL; 1089 br->group_fwd_mask = fwd_mask; 1090 } 1091 1092 if (data[IFLA_BR_GROUP_ADDR]) { 1093 u8 new_addr[ETH_ALEN]; 1094 1095 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN) 1096 return -EINVAL; 1097 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN); 1098 if (!is_link_local_ether_addr(new_addr)) 1099 return -EINVAL; 1100 if (new_addr[5] == 1 || /* 802.3x Pause address */ 1101 new_addr[5] == 2 || /* 802.3ad Slow protocols */ 1102 new_addr[5] == 3) /* 802.1X PAE address */ 1103 return -EINVAL; 1104 spin_lock_bh(&br->lock); 1105 memcpy(br->group_addr, new_addr, sizeof(br->group_addr)); 1106 spin_unlock_bh(&br->lock); 1107 br->group_addr_set = true; 1108 br_recalculate_fwd_mask(br); 1109 } 1110 1111 if (data[IFLA_BR_FDB_FLUSH]) 1112 br_fdb_flush(br); 1113 1114 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1115 if (data[IFLA_BR_MCAST_ROUTER]) { 1116 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]); 1117 1118 err = br_multicast_set_router(br, multicast_router); 1119 if (err) 1120 return err; 1121 } 1122 1123 if (data[IFLA_BR_MCAST_SNOOPING]) { 1124 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]); 1125 1126 err = br_multicast_toggle(br, mcast_snooping); 1127 if (err) 1128 return err; 1129 } 1130 1131 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) { 1132 u8 val; 1133 1134 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]); 1135 br->multicast_query_use_ifaddr = !!val; 1136 } 1137 1138 if (data[IFLA_BR_MCAST_QUERIER]) { 1139 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]); 1140 1141 err = br_multicast_set_querier(br, mcast_querier); 1142 if (err) 1143 return err; 1144 } 1145 1146 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) { 1147 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]); 1148 1149 br->hash_elasticity = val; 1150 } 1151 1152 if (data[IFLA_BR_MCAST_HASH_MAX]) { 1153 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]); 1154 1155 err = br_multicast_set_hash_max(br, hash_max); 1156 if (err) 1157 return err; 1158 } 1159 1160 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) { 1161 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]); 1162 1163 br->multicast_last_member_count = val; 1164 } 1165 1166 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) { 1167 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]); 1168 1169 br->multicast_startup_query_count = val; 1170 } 1171 1172 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) { 1173 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]); 1174 1175 br->multicast_last_member_interval = clock_t_to_jiffies(val); 1176 } 1177 1178 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) { 1179 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]); 1180 1181 br->multicast_membership_interval = clock_t_to_jiffies(val); 1182 } 1183 1184 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) { 1185 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]); 1186 1187 br->multicast_querier_interval = clock_t_to_jiffies(val); 1188 } 1189 1190 if (data[IFLA_BR_MCAST_QUERY_INTVL]) { 1191 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]); 1192 1193 br->multicast_query_interval = clock_t_to_jiffies(val); 1194 } 1195 1196 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) { 1197 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]); 1198 1199 br->multicast_query_response_interval = clock_t_to_jiffies(val); 1200 } 1201 1202 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) { 1203 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]); 1204 1205 br->multicast_startup_query_interval = clock_t_to_jiffies(val); 1206 } 1207 1208 if (data[IFLA_BR_MCAST_STATS_ENABLED]) { 1209 __u8 mcast_stats; 1210 1211 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]); 1212 br->multicast_stats_enabled = !!mcast_stats; 1213 } 1214 1215 if (data[IFLA_BR_MCAST_IGMP_VERSION]) { 1216 __u8 igmp_version; 1217 1218 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]); 1219 err = br_multicast_set_igmp_version(br, igmp_version); 1220 if (err) 1221 return err; 1222 } 1223 1224 #if IS_ENABLED(CONFIG_IPV6) 1225 if (data[IFLA_BR_MCAST_MLD_VERSION]) { 1226 __u8 mld_version; 1227 1228 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]); 1229 err = br_multicast_set_mld_version(br, mld_version); 1230 if (err) 1231 return err; 1232 } 1233 #endif 1234 #endif 1235 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1236 if (data[IFLA_BR_NF_CALL_IPTABLES]) { 1237 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]); 1238 1239 br->nf_call_iptables = val ? true : false; 1240 } 1241 1242 if (data[IFLA_BR_NF_CALL_IP6TABLES]) { 1243 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]); 1244 1245 br->nf_call_ip6tables = val ? true : false; 1246 } 1247 1248 if (data[IFLA_BR_NF_CALL_ARPTABLES]) { 1249 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]); 1250 1251 br->nf_call_arptables = val ? true : false; 1252 } 1253 #endif 1254 1255 return 0; 1256 } 1257 1258 static int br_dev_newlink(struct net *src_net, struct net_device *dev, 1259 struct nlattr *tb[], struct nlattr *data[], 1260 struct netlink_ext_ack *extack) 1261 { 1262 struct net_bridge *br = netdev_priv(dev); 1263 int err; 1264 1265 err = register_netdevice(dev); 1266 if (err) 1267 return err; 1268 1269 if (tb[IFLA_ADDRESS]) { 1270 spin_lock_bh(&br->lock); 1271 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS])); 1272 spin_unlock_bh(&br->lock); 1273 } 1274 1275 err = br_changelink(dev, tb, data, extack); 1276 if (err) 1277 br_dev_delete(dev, NULL); 1278 1279 return err; 1280 } 1281 1282 static size_t br_get_size(const struct net_device *brdev) 1283 { 1284 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */ 1285 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */ 1286 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */ 1287 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */ 1288 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */ 1289 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */ 1290 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */ 1291 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1292 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */ 1293 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */ 1294 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */ 1295 #endif 1296 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */ 1297 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */ 1298 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */ 1299 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */ 1300 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */ 1301 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */ 1302 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */ 1303 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */ 1304 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */ 1305 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */ 1306 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */ 1307 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */ 1308 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1309 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */ 1310 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */ 1311 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */ 1312 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */ 1313 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */ 1314 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */ 1315 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */ 1316 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */ 1317 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */ 1318 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */ 1319 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */ 1320 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */ 1321 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */ 1322 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */ 1323 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */ 1324 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */ 1325 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */ 1326 #endif 1327 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1328 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */ 1329 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */ 1330 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */ 1331 #endif 1332 0; 1333 } 1334 1335 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev) 1336 { 1337 struct net_bridge *br = netdev_priv(brdev); 1338 u32 forward_delay = jiffies_to_clock_t(br->forward_delay); 1339 u32 hello_time = jiffies_to_clock_t(br->hello_time); 1340 u32 age_time = jiffies_to_clock_t(br->max_age); 1341 u32 ageing_time = jiffies_to_clock_t(br->ageing_time); 1342 u32 stp_enabled = br->stp_enabled; 1343 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]; 1344 u8 vlan_enabled = br_vlan_enabled(br->dev); 1345 u64 clockval; 1346 1347 clockval = br_timer_value(&br->hello_timer); 1348 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD)) 1349 return -EMSGSIZE; 1350 clockval = br_timer_value(&br->tcn_timer); 1351 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD)) 1352 return -EMSGSIZE; 1353 clockval = br_timer_value(&br->topology_change_timer); 1354 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval, 1355 IFLA_BR_PAD)) 1356 return -EMSGSIZE; 1357 clockval = br_timer_value(&br->gc_work.timer); 1358 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD)) 1359 return -EMSGSIZE; 1360 1361 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) || 1362 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) || 1363 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) || 1364 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) || 1365 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) || 1366 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) || 1367 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) || 1368 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) || 1369 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id), 1370 &br->bridge_id) || 1371 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id), 1372 &br->designated_root) || 1373 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) || 1374 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) || 1375 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) || 1376 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED, 1377 br->topology_change_detected) || 1378 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr)) 1379 return -EMSGSIZE; 1380 1381 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1382 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) || 1383 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) || 1384 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled)) 1385 return -EMSGSIZE; 1386 #endif 1387 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1388 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) || 1389 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) || 1390 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR, 1391 br->multicast_query_use_ifaddr) || 1392 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) || 1393 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED, 1394 br->multicast_stats_enabled) || 1395 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, 1396 br->hash_elasticity) || 1397 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) || 1398 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT, 1399 br->multicast_last_member_count) || 1400 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT, 1401 br->multicast_startup_query_count) || 1402 nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION, 1403 br->multicast_igmp_version)) 1404 return -EMSGSIZE; 1405 #if IS_ENABLED(CONFIG_IPV6) 1406 if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION, 1407 br->multicast_mld_version)) 1408 return -EMSGSIZE; 1409 #endif 1410 clockval = jiffies_to_clock_t(br->multicast_last_member_interval); 1411 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval, 1412 IFLA_BR_PAD)) 1413 return -EMSGSIZE; 1414 clockval = jiffies_to_clock_t(br->multicast_membership_interval); 1415 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval, 1416 IFLA_BR_PAD)) 1417 return -EMSGSIZE; 1418 clockval = jiffies_to_clock_t(br->multicast_querier_interval); 1419 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval, 1420 IFLA_BR_PAD)) 1421 return -EMSGSIZE; 1422 clockval = jiffies_to_clock_t(br->multicast_query_interval); 1423 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval, 1424 IFLA_BR_PAD)) 1425 return -EMSGSIZE; 1426 clockval = jiffies_to_clock_t(br->multicast_query_response_interval); 1427 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval, 1428 IFLA_BR_PAD)) 1429 return -EMSGSIZE; 1430 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval); 1431 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval, 1432 IFLA_BR_PAD)) 1433 return -EMSGSIZE; 1434 #endif 1435 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1436 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES, 1437 br->nf_call_iptables ? 1 : 0) || 1438 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES, 1439 br->nf_call_ip6tables ? 1 : 0) || 1440 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES, 1441 br->nf_call_arptables ? 1 : 0)) 1442 return -EMSGSIZE; 1443 #endif 1444 1445 return 0; 1446 } 1447 1448 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr) 1449 { 1450 struct net_bridge_port *p = NULL; 1451 struct net_bridge_vlan_group *vg; 1452 struct net_bridge_vlan *v; 1453 struct net_bridge *br; 1454 int numvls = 0; 1455 1456 switch (attr) { 1457 case IFLA_STATS_LINK_XSTATS: 1458 br = netdev_priv(dev); 1459 vg = br_vlan_group(br); 1460 break; 1461 case IFLA_STATS_LINK_XSTATS_SLAVE: 1462 p = br_port_get_rtnl(dev); 1463 if (!p) 1464 return 0; 1465 br = p->br; 1466 vg = nbp_vlan_group(p); 1467 break; 1468 default: 1469 return 0; 1470 } 1471 1472 if (vg) { 1473 /* we need to count all, even placeholder entries */ 1474 list_for_each_entry(v, &vg->vlan_list, vlist) 1475 numvls++; 1476 } 1477 1478 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) + 1479 nla_total_size(sizeof(struct br_mcast_stats)) + 1480 nla_total_size(0); 1481 } 1482 1483 static int br_fill_linkxstats(struct sk_buff *skb, 1484 const struct net_device *dev, 1485 int *prividx, int attr) 1486 { 1487 struct nlattr *nla __maybe_unused; 1488 struct net_bridge_port *p = NULL; 1489 struct net_bridge_vlan_group *vg; 1490 struct net_bridge_vlan *v; 1491 struct net_bridge *br; 1492 struct nlattr *nest; 1493 int vl_idx = 0; 1494 1495 switch (attr) { 1496 case IFLA_STATS_LINK_XSTATS: 1497 br = netdev_priv(dev); 1498 vg = br_vlan_group(br); 1499 break; 1500 case IFLA_STATS_LINK_XSTATS_SLAVE: 1501 p = br_port_get_rtnl(dev); 1502 if (!p) 1503 return 0; 1504 br = p->br; 1505 vg = nbp_vlan_group(p); 1506 break; 1507 default: 1508 return -EINVAL; 1509 } 1510 1511 nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE); 1512 if (!nest) 1513 return -EMSGSIZE; 1514 1515 if (vg) { 1516 u16 pvid; 1517 1518 pvid = br_get_pvid(vg); 1519 list_for_each_entry(v, &vg->vlan_list, vlist) { 1520 struct bridge_vlan_xstats vxi; 1521 struct br_vlan_stats stats; 1522 1523 if (++vl_idx < *prividx) 1524 continue; 1525 memset(&vxi, 0, sizeof(vxi)); 1526 vxi.vid = v->vid; 1527 vxi.flags = v->flags; 1528 if (v->vid == pvid) 1529 vxi.flags |= BRIDGE_VLAN_INFO_PVID; 1530 br_vlan_get_stats(v, &stats); 1531 vxi.rx_bytes = stats.rx_bytes; 1532 vxi.rx_packets = stats.rx_packets; 1533 vxi.tx_bytes = stats.tx_bytes; 1534 vxi.tx_packets = stats.tx_packets; 1535 1536 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi)) 1537 goto nla_put_failure; 1538 } 1539 } 1540 1541 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1542 if (++vl_idx >= *prividx) { 1543 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST, 1544 sizeof(struct br_mcast_stats), 1545 BRIDGE_XSTATS_PAD); 1546 if (!nla) 1547 goto nla_put_failure; 1548 br_multicast_get_stats(br, p, nla_data(nla)); 1549 } 1550 #endif 1551 nla_nest_end(skb, nest); 1552 *prividx = 0; 1553 1554 return 0; 1555 1556 nla_put_failure: 1557 nla_nest_end(skb, nest); 1558 *prividx = vl_idx; 1559 1560 return -EMSGSIZE; 1561 } 1562 1563 static struct rtnl_af_ops br_af_ops __read_mostly = { 1564 .family = AF_BRIDGE, 1565 .get_link_af_size = br_get_link_af_size_filtered, 1566 }; 1567 1568 struct rtnl_link_ops br_link_ops __read_mostly = { 1569 .kind = "bridge", 1570 .priv_size = sizeof(struct net_bridge), 1571 .setup = br_dev_setup, 1572 .maxtype = IFLA_BR_MAX, 1573 .policy = br_policy, 1574 .validate = br_validate, 1575 .newlink = br_dev_newlink, 1576 .changelink = br_changelink, 1577 .dellink = br_dev_delete, 1578 .get_size = br_get_size, 1579 .fill_info = br_fill_info, 1580 .fill_linkxstats = br_fill_linkxstats, 1581 .get_linkxstats_size = br_get_linkxstats_size, 1582 1583 .slave_maxtype = IFLA_BRPORT_MAX, 1584 .slave_policy = br_port_policy, 1585 .slave_changelink = br_port_slave_changelink, 1586 .get_slave_size = br_port_get_slave_size, 1587 .fill_slave_info = br_port_fill_slave_info, 1588 }; 1589 1590 int __init br_netlink_init(void) 1591 { 1592 int err; 1593 1594 br_mdb_init(); 1595 rtnl_af_register(&br_af_ops); 1596 1597 err = rtnl_link_register(&br_link_ops); 1598 if (err) 1599 goto out_af; 1600 1601 return 0; 1602 1603 out_af: 1604 rtnl_af_unregister(&br_af_ops); 1605 br_mdb_uninit(); 1606 return err; 1607 } 1608 1609 void br_netlink_fini(void) 1610 { 1611 br_mdb_uninit(); 1612 rtnl_af_unregister(&br_af_ops); 1613 rtnl_link_unregister(&br_link_ops); 1614 } 1615