1 // SPDX-License-Identifier: GPL-2.0-only 2 #include <linux/kernel.h> 3 #include <linux/netdevice.h> 4 #include <linux/rtnetlink.h> 5 #include <linux/slab.h> 6 #include <net/switchdev.h> 7 8 #include "br_private.h" 9 #include "br_private_tunnel.h" 10 11 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid); 12 13 static inline int br_vlan_cmp(struct rhashtable_compare_arg *arg, 14 const void *ptr) 15 { 16 const struct net_bridge_vlan *vle = ptr; 17 u16 vid = *(u16 *)arg->key; 18 19 return vle->vid != vid; 20 } 21 22 static const struct rhashtable_params br_vlan_rht_params = { 23 .head_offset = offsetof(struct net_bridge_vlan, vnode), 24 .key_offset = offsetof(struct net_bridge_vlan, vid), 25 .key_len = sizeof(u16), 26 .nelem_hint = 3, 27 .max_size = VLAN_N_VID, 28 .obj_cmpfn = br_vlan_cmp, 29 .automatic_shrinking = true, 30 }; 31 32 static struct net_bridge_vlan *br_vlan_lookup(struct rhashtable *tbl, u16 vid) 33 { 34 return rhashtable_lookup_fast(tbl, &vid, br_vlan_rht_params); 35 } 36 37 static bool __vlan_add_pvid(struct net_bridge_vlan_group *vg, 38 const struct net_bridge_vlan *v) 39 { 40 if (vg->pvid == v->vid) 41 return false; 42 43 smp_wmb(); 44 br_vlan_set_pvid_state(vg, v->state); 45 vg->pvid = v->vid; 46 47 return true; 48 } 49 50 static bool __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid) 51 { 52 if (vg->pvid != vid) 53 return false; 54 55 smp_wmb(); 56 vg->pvid = 0; 57 58 return true; 59 } 60 61 /* return true if anything changed, false otherwise */ 62 static bool __vlan_add_flags(struct net_bridge_vlan *v, u16 flags) 63 { 64 struct net_bridge_vlan_group *vg; 65 u16 old_flags = v->flags; 66 bool ret; 67 68 if (br_vlan_is_master(v)) 69 vg = br_vlan_group(v->br); 70 else 71 vg = nbp_vlan_group(v->port); 72 73 if (flags & BRIDGE_VLAN_INFO_PVID) 74 ret = __vlan_add_pvid(vg, v); 75 else 76 ret = __vlan_delete_pvid(vg, v->vid); 77 78 if (flags & BRIDGE_VLAN_INFO_UNTAGGED) 79 v->flags |= BRIDGE_VLAN_INFO_UNTAGGED; 80 else 81 v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED; 82 83 return ret || !!(old_flags ^ v->flags); 84 } 85 86 static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br, 87 struct net_bridge_vlan *v, u16 flags, 88 struct netlink_ext_ack *extack) 89 { 90 int err; 91 92 /* Try switchdev op first. In case it is not supported, fallback to 93 * 8021q add. 94 */ 95 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack); 96 if (err == -EOPNOTSUPP) 97 return vlan_vid_add(dev, br->vlan_proto, v->vid); 98 v->priv_flags |= BR_VLFLAG_ADDED_BY_SWITCHDEV; 99 return err; 100 } 101 102 static void __vlan_add_list(struct net_bridge_vlan *v) 103 { 104 struct net_bridge_vlan_group *vg; 105 struct list_head *headp, *hpos; 106 struct net_bridge_vlan *vent; 107 108 if (br_vlan_is_master(v)) 109 vg = br_vlan_group(v->br); 110 else 111 vg = nbp_vlan_group(v->port); 112 113 headp = &vg->vlan_list; 114 list_for_each_prev(hpos, headp) { 115 vent = list_entry(hpos, struct net_bridge_vlan, vlist); 116 if (v->vid < vent->vid) 117 continue; 118 else 119 break; 120 } 121 list_add_rcu(&v->vlist, hpos); 122 } 123 124 static void __vlan_del_list(struct net_bridge_vlan *v) 125 { 126 list_del_rcu(&v->vlist); 127 } 128 129 static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br, 130 const struct net_bridge_vlan *v) 131 { 132 int err; 133 134 /* Try switchdev op first. In case it is not supported, fallback to 135 * 8021q del. 136 */ 137 err = br_switchdev_port_vlan_del(dev, v->vid); 138 if (!(v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV)) 139 vlan_vid_del(dev, br->vlan_proto, v->vid); 140 return err == -EOPNOTSUPP ? 0 : err; 141 } 142 143 /* Returns a master vlan, if it didn't exist it gets created. In all cases a 144 * a reference is taken to the master vlan before returning. 145 */ 146 static struct net_bridge_vlan * 147 br_vlan_get_master(struct net_bridge *br, u16 vid, 148 struct netlink_ext_ack *extack) 149 { 150 struct net_bridge_vlan_group *vg; 151 struct net_bridge_vlan *masterv; 152 153 vg = br_vlan_group(br); 154 masterv = br_vlan_find(vg, vid); 155 if (!masterv) { 156 bool changed; 157 158 /* missing global ctx, create it now */ 159 if (br_vlan_add(br, vid, 0, &changed, extack)) 160 return NULL; 161 masterv = br_vlan_find(vg, vid); 162 if (WARN_ON(!masterv)) 163 return NULL; 164 refcount_set(&masterv->refcnt, 1); 165 return masterv; 166 } 167 refcount_inc(&masterv->refcnt); 168 169 return masterv; 170 } 171 172 static void br_master_vlan_rcu_free(struct rcu_head *rcu) 173 { 174 struct net_bridge_vlan *v; 175 176 v = container_of(rcu, struct net_bridge_vlan, rcu); 177 WARN_ON(!br_vlan_is_master(v)); 178 free_percpu(v->stats); 179 v->stats = NULL; 180 kfree(v); 181 } 182 183 static void br_vlan_put_master(struct net_bridge_vlan *masterv) 184 { 185 struct net_bridge_vlan_group *vg; 186 187 if (!br_vlan_is_master(masterv)) 188 return; 189 190 vg = br_vlan_group(masterv->br); 191 if (refcount_dec_and_test(&masterv->refcnt)) { 192 rhashtable_remove_fast(&vg->vlan_hash, 193 &masterv->vnode, br_vlan_rht_params); 194 __vlan_del_list(masterv); 195 call_rcu(&masterv->rcu, br_master_vlan_rcu_free); 196 } 197 } 198 199 static void nbp_vlan_rcu_free(struct rcu_head *rcu) 200 { 201 struct net_bridge_vlan *v; 202 203 v = container_of(rcu, struct net_bridge_vlan, rcu); 204 WARN_ON(br_vlan_is_master(v)); 205 /* if we had per-port stats configured then free them here */ 206 if (v->priv_flags & BR_VLFLAG_PER_PORT_STATS) 207 free_percpu(v->stats); 208 v->stats = NULL; 209 kfree(v); 210 } 211 212 /* This is the shared VLAN add function which works for both ports and bridge 213 * devices. There are four possible calls to this function in terms of the 214 * vlan entry type: 215 * 1. vlan is being added on a port (no master flags, global entry exists) 216 * 2. vlan is being added on a bridge (both master and brentry flags) 217 * 3. vlan is being added on a port, but a global entry didn't exist which 218 * is being created right now (master flag set, brentry flag unset), the 219 * global entry is used for global per-vlan features, but not for filtering 220 * 4. same as 3 but with both master and brentry flags set so the entry 221 * will be used for filtering in both the port and the bridge 222 */ 223 static int __vlan_add(struct net_bridge_vlan *v, u16 flags, 224 struct netlink_ext_ack *extack) 225 { 226 struct net_bridge_vlan *masterv = NULL; 227 struct net_bridge_port *p = NULL; 228 struct net_bridge_vlan_group *vg; 229 struct net_device *dev; 230 struct net_bridge *br; 231 int err; 232 233 if (br_vlan_is_master(v)) { 234 br = v->br; 235 dev = br->dev; 236 vg = br_vlan_group(br); 237 } else { 238 p = v->port; 239 br = p->br; 240 dev = p->dev; 241 vg = nbp_vlan_group(p); 242 } 243 244 if (p) { 245 /* Add VLAN to the device filter if it is supported. 246 * This ensures tagged traffic enters the bridge when 247 * promiscuous mode is disabled by br_manage_promisc(). 248 */ 249 err = __vlan_vid_add(dev, br, v, flags, extack); 250 if (err) 251 goto out; 252 253 /* need to work on the master vlan too */ 254 if (flags & BRIDGE_VLAN_INFO_MASTER) { 255 bool changed; 256 257 err = br_vlan_add(br, v->vid, 258 flags | BRIDGE_VLAN_INFO_BRENTRY, 259 &changed, extack); 260 if (err) 261 goto out_filt; 262 263 if (changed) 264 br_vlan_notify(br, NULL, v->vid, 0, 265 RTM_NEWVLAN); 266 } 267 268 masterv = br_vlan_get_master(br, v->vid, extack); 269 if (!masterv) 270 goto out_filt; 271 v->brvlan = masterv; 272 if (br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)) { 273 v->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats); 274 if (!v->stats) { 275 err = -ENOMEM; 276 goto out_filt; 277 } 278 v->priv_flags |= BR_VLFLAG_PER_PORT_STATS; 279 } else { 280 v->stats = masterv->stats; 281 } 282 } else { 283 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack); 284 if (err && err != -EOPNOTSUPP) 285 goto out; 286 } 287 288 /* Add the dev mac and count the vlan only if it's usable */ 289 if (br_vlan_should_use(v)) { 290 err = br_fdb_insert(br, p, dev->dev_addr, v->vid); 291 if (err) { 292 br_err(br, "failed insert local address into bridge forwarding table\n"); 293 goto out_filt; 294 } 295 vg->num_vlans++; 296 } 297 298 /* set the state before publishing */ 299 v->state = BR_STATE_FORWARDING; 300 301 err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode, 302 br_vlan_rht_params); 303 if (err) 304 goto out_fdb_insert; 305 306 __vlan_add_list(v); 307 __vlan_add_flags(v, flags); 308 309 if (p) 310 nbp_vlan_set_vlan_dev_state(p, v->vid); 311 out: 312 return err; 313 314 out_fdb_insert: 315 if (br_vlan_should_use(v)) { 316 br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid); 317 vg->num_vlans--; 318 } 319 320 out_filt: 321 if (p) { 322 __vlan_vid_del(dev, br, v); 323 if (masterv) { 324 if (v->stats && masterv->stats != v->stats) 325 free_percpu(v->stats); 326 v->stats = NULL; 327 328 br_vlan_put_master(masterv); 329 v->brvlan = NULL; 330 } 331 } else { 332 br_switchdev_port_vlan_del(dev, v->vid); 333 } 334 335 goto out; 336 } 337 338 static int __vlan_del(struct net_bridge_vlan *v) 339 { 340 struct net_bridge_vlan *masterv = v; 341 struct net_bridge_vlan_group *vg; 342 struct net_bridge_port *p = NULL; 343 int err = 0; 344 345 if (br_vlan_is_master(v)) { 346 vg = br_vlan_group(v->br); 347 } else { 348 p = v->port; 349 vg = nbp_vlan_group(v->port); 350 masterv = v->brvlan; 351 } 352 353 __vlan_delete_pvid(vg, v->vid); 354 if (p) { 355 err = __vlan_vid_del(p->dev, p->br, v); 356 if (err) 357 goto out; 358 } else { 359 err = br_switchdev_port_vlan_del(v->br->dev, v->vid); 360 if (err && err != -EOPNOTSUPP) 361 goto out; 362 err = 0; 363 } 364 365 if (br_vlan_should_use(v)) { 366 v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY; 367 vg->num_vlans--; 368 } 369 370 if (masterv != v) { 371 vlan_tunnel_info_del(vg, v); 372 rhashtable_remove_fast(&vg->vlan_hash, &v->vnode, 373 br_vlan_rht_params); 374 __vlan_del_list(v); 375 nbp_vlan_set_vlan_dev_state(p, v->vid); 376 call_rcu(&v->rcu, nbp_vlan_rcu_free); 377 } 378 379 br_vlan_put_master(masterv); 380 out: 381 return err; 382 } 383 384 static void __vlan_group_free(struct net_bridge_vlan_group *vg) 385 { 386 WARN_ON(!list_empty(&vg->vlan_list)); 387 rhashtable_destroy(&vg->vlan_hash); 388 vlan_tunnel_deinit(vg); 389 kfree(vg); 390 } 391 392 static void __vlan_flush(const struct net_bridge *br, 393 const struct net_bridge_port *p, 394 struct net_bridge_vlan_group *vg) 395 { 396 struct net_bridge_vlan *vlan, *tmp; 397 u16 v_start = 0, v_end = 0; 398 399 __vlan_delete_pvid(vg, vg->pvid); 400 list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) { 401 /* take care of disjoint ranges */ 402 if (!v_start) { 403 v_start = vlan->vid; 404 } else if (vlan->vid - v_end != 1) { 405 /* found range end, notify and start next one */ 406 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN); 407 v_start = vlan->vid; 408 } 409 v_end = vlan->vid; 410 411 __vlan_del(vlan); 412 } 413 414 /* notify about the last/whole vlan range */ 415 if (v_start) 416 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN); 417 } 418 419 struct sk_buff *br_handle_vlan(struct net_bridge *br, 420 const struct net_bridge_port *p, 421 struct net_bridge_vlan_group *vg, 422 struct sk_buff *skb) 423 { 424 struct br_vlan_stats *stats; 425 struct net_bridge_vlan *v; 426 u16 vid; 427 428 /* If this packet was not filtered at input, let it pass */ 429 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 430 goto out; 431 432 /* At this point, we know that the frame was filtered and contains 433 * a valid vlan id. If the vlan id has untagged flag set, 434 * send untagged; otherwise, send tagged. 435 */ 436 br_vlan_get_tag(skb, &vid); 437 v = br_vlan_find(vg, vid); 438 /* Vlan entry must be configured at this point. The 439 * only exception is the bridge is set in promisc mode and the 440 * packet is destined for the bridge device. In this case 441 * pass the packet as is. 442 */ 443 if (!v || !br_vlan_should_use(v)) { 444 if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) { 445 goto out; 446 } else { 447 kfree_skb(skb); 448 return NULL; 449 } 450 } 451 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 452 stats = this_cpu_ptr(v->stats); 453 u64_stats_update_begin(&stats->syncp); 454 stats->tx_bytes += skb->len; 455 stats->tx_packets++; 456 u64_stats_update_end(&stats->syncp); 457 } 458 459 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 460 __vlan_hwaccel_clear_tag(skb); 461 462 if (p && (p->flags & BR_VLAN_TUNNEL) && 463 br_handle_egress_vlan_tunnel(skb, v)) { 464 kfree_skb(skb); 465 return NULL; 466 } 467 out: 468 return skb; 469 } 470 471 /* Called under RCU */ 472 static bool __allowed_ingress(const struct net_bridge *br, 473 struct net_bridge_vlan_group *vg, 474 struct sk_buff *skb, u16 *vid, 475 u8 *state) 476 { 477 struct br_vlan_stats *stats; 478 struct net_bridge_vlan *v; 479 bool tagged; 480 481 BR_INPUT_SKB_CB(skb)->vlan_filtered = true; 482 /* If vlan tx offload is disabled on bridge device and frame was 483 * sent from vlan device on the bridge device, it does not have 484 * HW accelerated vlan tag. 485 */ 486 if (unlikely(!skb_vlan_tag_present(skb) && 487 skb->protocol == br->vlan_proto)) { 488 skb = skb_vlan_untag(skb); 489 if (unlikely(!skb)) 490 return false; 491 } 492 493 if (!br_vlan_get_tag(skb, vid)) { 494 /* Tagged frame */ 495 if (skb->vlan_proto != br->vlan_proto) { 496 /* Protocol-mismatch, empty out vlan_tci for new tag */ 497 skb_push(skb, ETH_HLEN); 498 skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, 499 skb_vlan_tag_get(skb)); 500 if (unlikely(!skb)) 501 return false; 502 503 skb_pull(skb, ETH_HLEN); 504 skb_reset_mac_len(skb); 505 *vid = 0; 506 tagged = false; 507 } else { 508 tagged = true; 509 } 510 } else { 511 /* Untagged frame */ 512 tagged = false; 513 } 514 515 if (!*vid) { 516 u16 pvid = br_get_pvid(vg); 517 518 /* Frame had a tag with VID 0 or did not have a tag. 519 * See if pvid is set on this port. That tells us which 520 * vlan untagged or priority-tagged traffic belongs to. 521 */ 522 if (!pvid) 523 goto drop; 524 525 /* PVID is set on this port. Any untagged or priority-tagged 526 * ingress frame is considered to belong to this vlan. 527 */ 528 *vid = pvid; 529 if (likely(!tagged)) 530 /* Untagged Frame. */ 531 __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid); 532 else 533 /* Priority-tagged Frame. 534 * At this point, we know that skb->vlan_tci VID 535 * field was 0. 536 * We update only VID field and preserve PCP field. 537 */ 538 skb->vlan_tci |= pvid; 539 540 /* if stats are disabled we can avoid the lookup */ 541 if (!br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 542 if (*state == BR_STATE_FORWARDING) { 543 *state = br_vlan_get_pvid_state(vg); 544 return br_vlan_state_allowed(*state, true); 545 } else { 546 return true; 547 } 548 } 549 } 550 v = br_vlan_find(vg, *vid); 551 if (!v || !br_vlan_should_use(v)) 552 goto drop; 553 554 if (*state == BR_STATE_FORWARDING) { 555 *state = br_vlan_get_state(v); 556 if (!br_vlan_state_allowed(*state, true)) 557 goto drop; 558 } 559 560 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 561 stats = this_cpu_ptr(v->stats); 562 u64_stats_update_begin(&stats->syncp); 563 stats->rx_bytes += skb->len; 564 stats->rx_packets++; 565 u64_stats_update_end(&stats->syncp); 566 } 567 568 return true; 569 570 drop: 571 kfree_skb(skb); 572 return false; 573 } 574 575 bool br_allowed_ingress(const struct net_bridge *br, 576 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 577 u16 *vid, u8 *state) 578 { 579 /* If VLAN filtering is disabled on the bridge, all packets are 580 * permitted. 581 */ 582 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) { 583 BR_INPUT_SKB_CB(skb)->vlan_filtered = false; 584 return true; 585 } 586 587 return __allowed_ingress(br, vg, skb, vid, state); 588 } 589 590 /* Called under RCU. */ 591 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 592 const struct sk_buff *skb) 593 { 594 const struct net_bridge_vlan *v; 595 u16 vid; 596 597 /* If this packet was not filtered at input, let it pass */ 598 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 599 return true; 600 601 br_vlan_get_tag(skb, &vid); 602 v = br_vlan_find(vg, vid); 603 if (v && br_vlan_should_use(v) && 604 br_vlan_state_allowed(br_vlan_get_state(v), false)) 605 return true; 606 607 return false; 608 } 609 610 /* Called under RCU */ 611 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid) 612 { 613 struct net_bridge_vlan_group *vg; 614 struct net_bridge *br = p->br; 615 struct net_bridge_vlan *v; 616 617 /* If filtering was disabled at input, let it pass. */ 618 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 619 return true; 620 621 vg = nbp_vlan_group_rcu(p); 622 if (!vg || !vg->num_vlans) 623 return false; 624 625 if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto) 626 *vid = 0; 627 628 if (!*vid) { 629 *vid = br_get_pvid(vg); 630 if (!*vid || 631 !br_vlan_state_allowed(br_vlan_get_pvid_state(vg), true)) 632 return false; 633 634 return true; 635 } 636 637 v = br_vlan_find(vg, *vid); 638 if (v && br_vlan_state_allowed(br_vlan_get_state(v), true)) 639 return true; 640 641 return false; 642 } 643 644 static int br_vlan_add_existing(struct net_bridge *br, 645 struct net_bridge_vlan_group *vg, 646 struct net_bridge_vlan *vlan, 647 u16 flags, bool *changed, 648 struct netlink_ext_ack *extack) 649 { 650 int err; 651 652 err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack); 653 if (err && err != -EOPNOTSUPP) 654 return err; 655 656 if (!br_vlan_is_brentry(vlan)) { 657 /* Trying to change flags of non-existent bridge vlan */ 658 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) { 659 err = -EINVAL; 660 goto err_flags; 661 } 662 /* It was only kept for port vlans, now make it real */ 663 err = br_fdb_insert(br, NULL, br->dev->dev_addr, 664 vlan->vid); 665 if (err) { 666 br_err(br, "failed to insert local address into bridge forwarding table\n"); 667 goto err_fdb_insert; 668 } 669 670 refcount_inc(&vlan->refcnt); 671 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY; 672 vg->num_vlans++; 673 *changed = true; 674 } 675 676 if (__vlan_add_flags(vlan, flags)) 677 *changed = true; 678 679 return 0; 680 681 err_fdb_insert: 682 err_flags: 683 br_switchdev_port_vlan_del(br->dev, vlan->vid); 684 return err; 685 } 686 687 /* Must be protected by RTNL. 688 * Must be called with vid in range from 1 to 4094 inclusive. 689 * changed must be true only if the vlan was created or updated 690 */ 691 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed, 692 struct netlink_ext_ack *extack) 693 { 694 struct net_bridge_vlan_group *vg; 695 struct net_bridge_vlan *vlan; 696 int ret; 697 698 ASSERT_RTNL(); 699 700 *changed = false; 701 vg = br_vlan_group(br); 702 vlan = br_vlan_find(vg, vid); 703 if (vlan) 704 return br_vlan_add_existing(br, vg, vlan, flags, changed, 705 extack); 706 707 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 708 if (!vlan) 709 return -ENOMEM; 710 711 vlan->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats); 712 if (!vlan->stats) { 713 kfree(vlan); 714 return -ENOMEM; 715 } 716 vlan->vid = vid; 717 vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER; 718 vlan->flags &= ~BRIDGE_VLAN_INFO_PVID; 719 vlan->br = br; 720 if (flags & BRIDGE_VLAN_INFO_BRENTRY) 721 refcount_set(&vlan->refcnt, 1); 722 ret = __vlan_add(vlan, flags, extack); 723 if (ret) { 724 free_percpu(vlan->stats); 725 kfree(vlan); 726 } else { 727 *changed = true; 728 } 729 730 return ret; 731 } 732 733 /* Must be protected by RTNL. 734 * Must be called with vid in range from 1 to 4094 inclusive. 735 */ 736 int br_vlan_delete(struct net_bridge *br, u16 vid) 737 { 738 struct net_bridge_vlan_group *vg; 739 struct net_bridge_vlan *v; 740 741 ASSERT_RTNL(); 742 743 vg = br_vlan_group(br); 744 v = br_vlan_find(vg, vid); 745 if (!v || !br_vlan_is_brentry(v)) 746 return -ENOENT; 747 748 br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid); 749 br_fdb_delete_by_port(br, NULL, vid, 0); 750 751 vlan_tunnel_info_del(vg, v); 752 753 return __vlan_del(v); 754 } 755 756 void br_vlan_flush(struct net_bridge *br) 757 { 758 struct net_bridge_vlan_group *vg; 759 760 ASSERT_RTNL(); 761 762 vg = br_vlan_group(br); 763 __vlan_flush(br, NULL, vg); 764 RCU_INIT_POINTER(br->vlgrp, NULL); 765 synchronize_rcu(); 766 __vlan_group_free(vg); 767 } 768 769 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid) 770 { 771 if (!vg) 772 return NULL; 773 774 return br_vlan_lookup(&vg->vlan_hash, vid); 775 } 776 777 /* Must be protected by RTNL. */ 778 static void recalculate_group_addr(struct net_bridge *br) 779 { 780 if (br_opt_get(br, BROPT_GROUP_ADDR_SET)) 781 return; 782 783 spin_lock_bh(&br->lock); 784 if (!br_opt_get(br, BROPT_VLAN_ENABLED) || 785 br->vlan_proto == htons(ETH_P_8021Q)) { 786 /* Bridge Group Address */ 787 br->group_addr[5] = 0x00; 788 } else { /* vlan_enabled && ETH_P_8021AD */ 789 /* Provider Bridge Group Address */ 790 br->group_addr[5] = 0x08; 791 } 792 spin_unlock_bh(&br->lock); 793 } 794 795 /* Must be protected by RTNL. */ 796 void br_recalculate_fwd_mask(struct net_bridge *br) 797 { 798 if (!br_opt_get(br, BROPT_VLAN_ENABLED) || 799 br->vlan_proto == htons(ETH_P_8021Q)) 800 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT; 801 else /* vlan_enabled && ETH_P_8021AD */ 802 br->group_fwd_mask_required = BR_GROUPFWD_8021AD & 803 ~(1u << br->group_addr[5]); 804 } 805 806 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) 807 { 808 struct switchdev_attr attr = { 809 .orig_dev = br->dev, 810 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 811 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 812 .u.vlan_filtering = val, 813 }; 814 int err; 815 816 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val) 817 return 0; 818 819 err = switchdev_port_attr_set(br->dev, &attr); 820 if (err && err != -EOPNOTSUPP) 821 return err; 822 823 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val); 824 br_manage_promisc(br); 825 recalculate_group_addr(br); 826 br_recalculate_fwd_mask(br); 827 828 return 0; 829 } 830 831 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) 832 { 833 return __br_vlan_filter_toggle(br, val); 834 } 835 836 bool br_vlan_enabled(const struct net_device *dev) 837 { 838 struct net_bridge *br = netdev_priv(dev); 839 840 return br_opt_get(br, BROPT_VLAN_ENABLED); 841 } 842 EXPORT_SYMBOL_GPL(br_vlan_enabled); 843 844 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto) 845 { 846 struct net_bridge *br = netdev_priv(dev); 847 848 *p_proto = ntohs(br->vlan_proto); 849 850 return 0; 851 } 852 EXPORT_SYMBOL_GPL(br_vlan_get_proto); 853 854 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto) 855 { 856 int err = 0; 857 struct net_bridge_port *p; 858 struct net_bridge_vlan *vlan; 859 struct net_bridge_vlan_group *vg; 860 __be16 oldproto; 861 862 if (br->vlan_proto == proto) 863 return 0; 864 865 /* Add VLANs for the new proto to the device filter. */ 866 list_for_each_entry(p, &br->port_list, list) { 867 vg = nbp_vlan_group(p); 868 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 869 err = vlan_vid_add(p->dev, proto, vlan->vid); 870 if (err) 871 goto err_filt; 872 } 873 } 874 875 oldproto = br->vlan_proto; 876 br->vlan_proto = proto; 877 878 recalculate_group_addr(br); 879 br_recalculate_fwd_mask(br); 880 881 /* Delete VLANs for the old proto from the device filter. */ 882 list_for_each_entry(p, &br->port_list, list) { 883 vg = nbp_vlan_group(p); 884 list_for_each_entry(vlan, &vg->vlan_list, vlist) 885 vlan_vid_del(p->dev, oldproto, vlan->vid); 886 } 887 888 return 0; 889 890 err_filt: 891 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist) 892 vlan_vid_del(p->dev, proto, vlan->vid); 893 894 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 895 vg = nbp_vlan_group(p); 896 list_for_each_entry(vlan, &vg->vlan_list, vlist) 897 vlan_vid_del(p->dev, proto, vlan->vid); 898 } 899 900 return err; 901 } 902 903 int br_vlan_set_proto(struct net_bridge *br, unsigned long val) 904 { 905 if (val != ETH_P_8021Q && val != ETH_P_8021AD) 906 return -EPROTONOSUPPORT; 907 908 return __br_vlan_set_proto(br, htons(val)); 909 } 910 911 int br_vlan_set_stats(struct net_bridge *br, unsigned long val) 912 { 913 switch (val) { 914 case 0: 915 case 1: 916 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val); 917 break; 918 default: 919 return -EINVAL; 920 } 921 922 return 0; 923 } 924 925 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val) 926 { 927 struct net_bridge_port *p; 928 929 /* allow to change the option if there are no port vlans configured */ 930 list_for_each_entry(p, &br->port_list, list) { 931 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 932 933 if (vg->num_vlans) 934 return -EBUSY; 935 } 936 937 switch (val) { 938 case 0: 939 case 1: 940 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val); 941 break; 942 default: 943 return -EINVAL; 944 } 945 946 return 0; 947 } 948 949 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid) 950 { 951 struct net_bridge_vlan *v; 952 953 if (vid != vg->pvid) 954 return false; 955 956 v = br_vlan_lookup(&vg->vlan_hash, vid); 957 if (v && br_vlan_should_use(v) && 958 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 959 return true; 960 961 return false; 962 } 963 964 static void br_vlan_disable_default_pvid(struct net_bridge *br) 965 { 966 struct net_bridge_port *p; 967 u16 pvid = br->default_pvid; 968 969 /* Disable default_pvid on all ports where it is still 970 * configured. 971 */ 972 if (vlan_default_pvid(br_vlan_group(br), pvid)) { 973 if (!br_vlan_delete(br, pvid)) 974 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); 975 } 976 977 list_for_each_entry(p, &br->port_list, list) { 978 if (vlan_default_pvid(nbp_vlan_group(p), pvid) && 979 !nbp_vlan_delete(p, pvid)) 980 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); 981 } 982 983 br->default_pvid = 0; 984 } 985 986 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 987 struct netlink_ext_ack *extack) 988 { 989 const struct net_bridge_vlan *pvent; 990 struct net_bridge_vlan_group *vg; 991 struct net_bridge_port *p; 992 unsigned long *changed; 993 bool vlchange; 994 u16 old_pvid; 995 int err = 0; 996 997 if (!pvid) { 998 br_vlan_disable_default_pvid(br); 999 return 0; 1000 } 1001 1002 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL); 1003 if (!changed) 1004 return -ENOMEM; 1005 1006 old_pvid = br->default_pvid; 1007 1008 /* Update default_pvid config only if we do not conflict with 1009 * user configuration. 1010 */ 1011 vg = br_vlan_group(br); 1012 pvent = br_vlan_find(vg, pvid); 1013 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) && 1014 (!pvent || !br_vlan_should_use(pvent))) { 1015 err = br_vlan_add(br, pvid, 1016 BRIDGE_VLAN_INFO_PVID | 1017 BRIDGE_VLAN_INFO_UNTAGGED | 1018 BRIDGE_VLAN_INFO_BRENTRY, 1019 &vlchange, extack); 1020 if (err) 1021 goto out; 1022 1023 if (br_vlan_delete(br, old_pvid)) 1024 br_vlan_notify(br, NULL, old_pvid, 0, RTM_DELVLAN); 1025 br_vlan_notify(br, NULL, pvid, 0, RTM_NEWVLAN); 1026 set_bit(0, changed); 1027 } 1028 1029 list_for_each_entry(p, &br->port_list, list) { 1030 /* Update default_pvid config only if we do not conflict with 1031 * user configuration. 1032 */ 1033 vg = nbp_vlan_group(p); 1034 if ((old_pvid && 1035 !vlan_default_pvid(vg, old_pvid)) || 1036 br_vlan_find(vg, pvid)) 1037 continue; 1038 1039 err = nbp_vlan_add(p, pvid, 1040 BRIDGE_VLAN_INFO_PVID | 1041 BRIDGE_VLAN_INFO_UNTAGGED, 1042 &vlchange, extack); 1043 if (err) 1044 goto err_port; 1045 if (nbp_vlan_delete(p, old_pvid)) 1046 br_vlan_notify(br, p, old_pvid, 0, RTM_DELVLAN); 1047 br_vlan_notify(p->br, p, pvid, 0, RTM_NEWVLAN); 1048 set_bit(p->port_no, changed); 1049 } 1050 1051 br->default_pvid = pvid; 1052 1053 out: 1054 bitmap_free(changed); 1055 return err; 1056 1057 err_port: 1058 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 1059 if (!test_bit(p->port_no, changed)) 1060 continue; 1061 1062 if (old_pvid) { 1063 nbp_vlan_add(p, old_pvid, 1064 BRIDGE_VLAN_INFO_PVID | 1065 BRIDGE_VLAN_INFO_UNTAGGED, 1066 &vlchange, NULL); 1067 br_vlan_notify(p->br, p, old_pvid, 0, RTM_NEWVLAN); 1068 } 1069 nbp_vlan_delete(p, pvid); 1070 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); 1071 } 1072 1073 if (test_bit(0, changed)) { 1074 if (old_pvid) { 1075 br_vlan_add(br, old_pvid, 1076 BRIDGE_VLAN_INFO_PVID | 1077 BRIDGE_VLAN_INFO_UNTAGGED | 1078 BRIDGE_VLAN_INFO_BRENTRY, 1079 &vlchange, NULL); 1080 br_vlan_notify(br, NULL, old_pvid, 0, RTM_NEWVLAN); 1081 } 1082 br_vlan_delete(br, pvid); 1083 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); 1084 } 1085 goto out; 1086 } 1087 1088 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val) 1089 { 1090 u16 pvid = val; 1091 int err = 0; 1092 1093 if (val >= VLAN_VID_MASK) 1094 return -EINVAL; 1095 1096 if (pvid == br->default_pvid) 1097 goto out; 1098 1099 /* Only allow default pvid change when filtering is disabled */ 1100 if (br_opt_get(br, BROPT_VLAN_ENABLED)) { 1101 pr_info_once("Please disable vlan filtering to change default_pvid\n"); 1102 err = -EPERM; 1103 goto out; 1104 } 1105 err = __br_vlan_set_default_pvid(br, pvid, NULL); 1106 out: 1107 return err; 1108 } 1109 1110 int br_vlan_init(struct net_bridge *br) 1111 { 1112 struct net_bridge_vlan_group *vg; 1113 int ret = -ENOMEM; 1114 1115 vg = kzalloc(sizeof(*vg), GFP_KERNEL); 1116 if (!vg) 1117 goto out; 1118 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1119 if (ret) 1120 goto err_rhtbl; 1121 ret = vlan_tunnel_init(vg); 1122 if (ret) 1123 goto err_tunnel_init; 1124 INIT_LIST_HEAD(&vg->vlan_list); 1125 br->vlan_proto = htons(ETH_P_8021Q); 1126 br->default_pvid = 1; 1127 rcu_assign_pointer(br->vlgrp, vg); 1128 1129 out: 1130 return ret; 1131 1132 err_tunnel_init: 1133 rhashtable_destroy(&vg->vlan_hash); 1134 err_rhtbl: 1135 kfree(vg); 1136 1137 goto out; 1138 } 1139 1140 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack) 1141 { 1142 struct switchdev_attr attr = { 1143 .orig_dev = p->br->dev, 1144 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 1145 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 1146 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED), 1147 }; 1148 struct net_bridge_vlan_group *vg; 1149 int ret = -ENOMEM; 1150 1151 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); 1152 if (!vg) 1153 goto out; 1154 1155 ret = switchdev_port_attr_set(p->dev, &attr); 1156 if (ret && ret != -EOPNOTSUPP) 1157 goto err_vlan_enabled; 1158 1159 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1160 if (ret) 1161 goto err_rhtbl; 1162 ret = vlan_tunnel_init(vg); 1163 if (ret) 1164 goto err_tunnel_init; 1165 INIT_LIST_HEAD(&vg->vlan_list); 1166 rcu_assign_pointer(p->vlgrp, vg); 1167 if (p->br->default_pvid) { 1168 bool changed; 1169 1170 ret = nbp_vlan_add(p, p->br->default_pvid, 1171 BRIDGE_VLAN_INFO_PVID | 1172 BRIDGE_VLAN_INFO_UNTAGGED, 1173 &changed, extack); 1174 if (ret) 1175 goto err_vlan_add; 1176 br_vlan_notify(p->br, p, p->br->default_pvid, 0, RTM_NEWVLAN); 1177 } 1178 out: 1179 return ret; 1180 1181 err_vlan_add: 1182 RCU_INIT_POINTER(p->vlgrp, NULL); 1183 synchronize_rcu(); 1184 vlan_tunnel_deinit(vg); 1185 err_tunnel_init: 1186 rhashtable_destroy(&vg->vlan_hash); 1187 err_rhtbl: 1188 err_vlan_enabled: 1189 kfree(vg); 1190 1191 goto out; 1192 } 1193 1194 /* Must be protected by RTNL. 1195 * Must be called with vid in range from 1 to 4094 inclusive. 1196 * changed must be true only if the vlan was created or updated 1197 */ 1198 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1199 bool *changed, struct netlink_ext_ack *extack) 1200 { 1201 struct net_bridge_vlan *vlan; 1202 int ret; 1203 1204 ASSERT_RTNL(); 1205 1206 *changed = false; 1207 vlan = br_vlan_find(nbp_vlan_group(port), vid); 1208 if (vlan) { 1209 /* Pass the flags to the hardware bridge */ 1210 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack); 1211 if (ret && ret != -EOPNOTSUPP) 1212 return ret; 1213 *changed = __vlan_add_flags(vlan, flags); 1214 1215 return 0; 1216 } 1217 1218 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 1219 if (!vlan) 1220 return -ENOMEM; 1221 1222 vlan->vid = vid; 1223 vlan->port = port; 1224 ret = __vlan_add(vlan, flags, extack); 1225 if (ret) 1226 kfree(vlan); 1227 else 1228 *changed = true; 1229 1230 return ret; 1231 } 1232 1233 /* Must be protected by RTNL. 1234 * Must be called with vid in range from 1 to 4094 inclusive. 1235 */ 1236 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1237 { 1238 struct net_bridge_vlan *v; 1239 1240 ASSERT_RTNL(); 1241 1242 v = br_vlan_find(nbp_vlan_group(port), vid); 1243 if (!v) 1244 return -ENOENT; 1245 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); 1246 br_fdb_delete_by_port(port->br, port, vid, 0); 1247 1248 return __vlan_del(v); 1249 } 1250 1251 void nbp_vlan_flush(struct net_bridge_port *port) 1252 { 1253 struct net_bridge_vlan_group *vg; 1254 1255 ASSERT_RTNL(); 1256 1257 vg = nbp_vlan_group(port); 1258 __vlan_flush(port->br, port, vg); 1259 RCU_INIT_POINTER(port->vlgrp, NULL); 1260 synchronize_rcu(); 1261 __vlan_group_free(vg); 1262 } 1263 1264 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1265 struct br_vlan_stats *stats) 1266 { 1267 int i; 1268 1269 memset(stats, 0, sizeof(*stats)); 1270 for_each_possible_cpu(i) { 1271 u64 rxpackets, rxbytes, txpackets, txbytes; 1272 struct br_vlan_stats *cpu_stats; 1273 unsigned int start; 1274 1275 cpu_stats = per_cpu_ptr(v->stats, i); 1276 do { 1277 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 1278 rxpackets = cpu_stats->rx_packets; 1279 rxbytes = cpu_stats->rx_bytes; 1280 txbytes = cpu_stats->tx_bytes; 1281 txpackets = cpu_stats->tx_packets; 1282 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 1283 1284 stats->rx_packets += rxpackets; 1285 stats->rx_bytes += rxbytes; 1286 stats->tx_bytes += txbytes; 1287 stats->tx_packets += txpackets; 1288 } 1289 } 1290 1291 static int __br_vlan_get_pvid(const struct net_device *dev, 1292 struct net_bridge_port *p, u16 *p_pvid) 1293 { 1294 struct net_bridge_vlan_group *vg; 1295 1296 if (p) 1297 vg = nbp_vlan_group(p); 1298 else if (netif_is_bridge_master(dev)) 1299 vg = br_vlan_group(netdev_priv(dev)); 1300 else 1301 return -EINVAL; 1302 1303 *p_pvid = br_get_pvid(vg); 1304 return 0; 1305 } 1306 1307 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 1308 { 1309 ASSERT_RTNL(); 1310 1311 return __br_vlan_get_pvid(dev, br_port_get_check_rtnl(dev), p_pvid); 1312 } 1313 EXPORT_SYMBOL_GPL(br_vlan_get_pvid); 1314 1315 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) 1316 { 1317 return __br_vlan_get_pvid(dev, br_port_get_check_rcu(dev), p_pvid); 1318 } 1319 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu); 1320 1321 int br_vlan_get_info(const struct net_device *dev, u16 vid, 1322 struct bridge_vlan_info *p_vinfo) 1323 { 1324 struct net_bridge_vlan_group *vg; 1325 struct net_bridge_vlan *v; 1326 struct net_bridge_port *p; 1327 1328 ASSERT_RTNL(); 1329 p = br_port_get_check_rtnl(dev); 1330 if (p) 1331 vg = nbp_vlan_group(p); 1332 else if (netif_is_bridge_master(dev)) 1333 vg = br_vlan_group(netdev_priv(dev)); 1334 else 1335 return -EINVAL; 1336 1337 v = br_vlan_find(vg, vid); 1338 if (!v) 1339 return -ENOENT; 1340 1341 p_vinfo->vid = vid; 1342 p_vinfo->flags = v->flags; 1343 if (vid == br_get_pvid(vg)) 1344 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID; 1345 return 0; 1346 } 1347 EXPORT_SYMBOL_GPL(br_vlan_get_info); 1348 1349 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev) 1350 { 1351 return is_vlan_dev(dev) && 1352 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING); 1353 } 1354 1355 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev, 1356 __always_unused void *data) 1357 { 1358 return br_vlan_is_bind_vlan_dev(dev); 1359 } 1360 1361 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev) 1362 { 1363 int found; 1364 1365 rcu_read_lock(); 1366 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn, 1367 NULL); 1368 rcu_read_unlock(); 1369 1370 return !!found; 1371 } 1372 1373 struct br_vlan_bind_walk_data { 1374 u16 vid; 1375 struct net_device *result; 1376 }; 1377 1378 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev, 1379 void *data_in) 1380 { 1381 struct br_vlan_bind_walk_data *data = data_in; 1382 int found = 0; 1383 1384 if (br_vlan_is_bind_vlan_dev(dev) && 1385 vlan_dev_priv(dev)->vlan_id == data->vid) { 1386 data->result = dev; 1387 found = 1; 1388 } 1389 1390 return found; 1391 } 1392 1393 static struct net_device * 1394 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid) 1395 { 1396 struct br_vlan_bind_walk_data data = { 1397 .vid = vid, 1398 }; 1399 1400 rcu_read_lock(); 1401 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn, 1402 &data); 1403 rcu_read_unlock(); 1404 1405 return data.result; 1406 } 1407 1408 static bool br_vlan_is_dev_up(const struct net_device *dev) 1409 { 1410 return !!(dev->flags & IFF_UP) && netif_oper_up(dev); 1411 } 1412 1413 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br, 1414 struct net_device *vlan_dev) 1415 { 1416 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id; 1417 struct net_bridge_vlan_group *vg; 1418 struct net_bridge_port *p; 1419 bool has_carrier = false; 1420 1421 if (!netif_carrier_ok(br->dev)) { 1422 netif_carrier_off(vlan_dev); 1423 return; 1424 } 1425 1426 list_for_each_entry(p, &br->port_list, list) { 1427 vg = nbp_vlan_group(p); 1428 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) { 1429 has_carrier = true; 1430 break; 1431 } 1432 } 1433 1434 if (has_carrier) 1435 netif_carrier_on(vlan_dev); 1436 else 1437 netif_carrier_off(vlan_dev); 1438 } 1439 1440 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p) 1441 { 1442 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 1443 struct net_bridge_vlan *vlan; 1444 struct net_device *vlan_dev; 1445 1446 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 1447 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, 1448 vlan->vid); 1449 if (vlan_dev) { 1450 if (br_vlan_is_dev_up(p->dev)) { 1451 if (netif_carrier_ok(p->br->dev)) 1452 netif_carrier_on(vlan_dev); 1453 } else { 1454 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1455 } 1456 } 1457 } 1458 } 1459 1460 static void br_vlan_upper_change(struct net_device *dev, 1461 struct net_device *upper_dev, 1462 bool linking) 1463 { 1464 struct net_bridge *br = netdev_priv(dev); 1465 1466 if (!br_vlan_is_bind_vlan_dev(upper_dev)) 1467 return; 1468 1469 if (linking) { 1470 br_vlan_set_vlan_dev_state(br, upper_dev); 1471 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true); 1472 } else { 1473 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, 1474 br_vlan_has_upper_bind_vlan_dev(dev)); 1475 } 1476 } 1477 1478 struct br_vlan_link_state_walk_data { 1479 struct net_bridge *br; 1480 }; 1481 1482 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev, 1483 void *data_in) 1484 { 1485 struct br_vlan_link_state_walk_data *data = data_in; 1486 1487 if (br_vlan_is_bind_vlan_dev(vlan_dev)) 1488 br_vlan_set_vlan_dev_state(data->br, vlan_dev); 1489 1490 return 0; 1491 } 1492 1493 static void br_vlan_link_state_change(struct net_device *dev, 1494 struct net_bridge *br) 1495 { 1496 struct br_vlan_link_state_walk_data data = { 1497 .br = br 1498 }; 1499 1500 rcu_read_lock(); 1501 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn, 1502 &data); 1503 rcu_read_unlock(); 1504 } 1505 1506 /* Must be protected by RTNL. */ 1507 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid) 1508 { 1509 struct net_device *vlan_dev; 1510 1511 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1512 return; 1513 1514 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid); 1515 if (vlan_dev) 1516 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1517 } 1518 1519 /* Must be protected by RTNL. */ 1520 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr) 1521 { 1522 struct netdev_notifier_changeupper_info *info; 1523 struct net_bridge *br = netdev_priv(dev); 1524 int vlcmd = 0, ret = 0; 1525 bool changed = false; 1526 1527 switch (event) { 1528 case NETDEV_REGISTER: 1529 ret = br_vlan_add(br, br->default_pvid, 1530 BRIDGE_VLAN_INFO_PVID | 1531 BRIDGE_VLAN_INFO_UNTAGGED | 1532 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL); 1533 vlcmd = RTM_NEWVLAN; 1534 break; 1535 case NETDEV_UNREGISTER: 1536 changed = !br_vlan_delete(br, br->default_pvid); 1537 vlcmd = RTM_DELVLAN; 1538 break; 1539 case NETDEV_CHANGEUPPER: 1540 info = ptr; 1541 br_vlan_upper_change(dev, info->upper_dev, info->linking); 1542 break; 1543 1544 case NETDEV_CHANGE: 1545 case NETDEV_UP: 1546 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING)) 1547 break; 1548 br_vlan_link_state_change(dev, br); 1549 break; 1550 } 1551 if (changed) 1552 br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd); 1553 1554 return ret; 1555 } 1556 1557 /* Must be protected by RTNL. */ 1558 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event) 1559 { 1560 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1561 return; 1562 1563 switch (event) { 1564 case NETDEV_CHANGE: 1565 case NETDEV_DOWN: 1566 case NETDEV_UP: 1567 br_vlan_set_all_vlan_dev_state(p); 1568 break; 1569 } 1570 } 1571 1572 static bool br_vlan_stats_fill(struct sk_buff *skb, 1573 const struct net_bridge_vlan *v) 1574 { 1575 struct br_vlan_stats stats; 1576 struct nlattr *nest; 1577 1578 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_STATS); 1579 if (!nest) 1580 return false; 1581 1582 br_vlan_get_stats(v, &stats); 1583 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES, stats.rx_bytes, 1584 BRIDGE_VLANDB_STATS_PAD) || 1585 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_PACKETS, 1586 stats.rx_packets, BRIDGE_VLANDB_STATS_PAD) || 1587 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES, stats.tx_bytes, 1588 BRIDGE_VLANDB_STATS_PAD) || 1589 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_PACKETS, 1590 stats.tx_packets, BRIDGE_VLANDB_STATS_PAD)) 1591 goto out_err; 1592 1593 nla_nest_end(skb, nest); 1594 1595 return true; 1596 1597 out_err: 1598 nla_nest_cancel(skb, nest); 1599 return false; 1600 } 1601 1602 /* v_opts is used to dump the options which must be equal in the whole range */ 1603 static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range, 1604 const struct net_bridge_vlan *v_opts, 1605 u16 flags, 1606 bool dump_stats) 1607 { 1608 struct bridge_vlan_info info; 1609 struct nlattr *nest; 1610 1611 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY); 1612 if (!nest) 1613 return false; 1614 1615 memset(&info, 0, sizeof(info)); 1616 info.vid = vid; 1617 if (flags & BRIDGE_VLAN_INFO_UNTAGGED) 1618 info.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 1619 if (flags & BRIDGE_VLAN_INFO_PVID) 1620 info.flags |= BRIDGE_VLAN_INFO_PVID; 1621 1622 if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info)) 1623 goto out_err; 1624 1625 if (vid_range && vid < vid_range && 1626 !(flags & BRIDGE_VLAN_INFO_PVID) && 1627 nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range)) 1628 goto out_err; 1629 1630 if (v_opts) { 1631 if (!br_vlan_opts_fill(skb, v_opts)) 1632 goto out_err; 1633 1634 if (dump_stats && !br_vlan_stats_fill(skb, v_opts)) 1635 goto out_err; 1636 } 1637 1638 nla_nest_end(skb, nest); 1639 1640 return true; 1641 1642 out_err: 1643 nla_nest_cancel(skb, nest); 1644 return false; 1645 } 1646 1647 static size_t rtnl_vlan_nlmsg_size(void) 1648 { 1649 return NLMSG_ALIGN(sizeof(struct br_vlan_msg)) 1650 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */ 1651 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */ 1652 + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */ 1653 + br_vlan_opts_nl_size(); /* bridge vlan options */ 1654 } 1655 1656 void br_vlan_notify(const struct net_bridge *br, 1657 const struct net_bridge_port *p, 1658 u16 vid, u16 vid_range, 1659 int cmd) 1660 { 1661 struct net_bridge_vlan_group *vg; 1662 struct net_bridge_vlan *v = NULL; 1663 struct br_vlan_msg *bvm; 1664 struct nlmsghdr *nlh; 1665 struct sk_buff *skb; 1666 int err = -ENOBUFS; 1667 struct net *net; 1668 u16 flags = 0; 1669 int ifindex; 1670 1671 /* right now notifications are done only with rtnl held */ 1672 ASSERT_RTNL(); 1673 1674 if (p) { 1675 ifindex = p->dev->ifindex; 1676 vg = nbp_vlan_group(p); 1677 net = dev_net(p->dev); 1678 } else { 1679 ifindex = br->dev->ifindex; 1680 vg = br_vlan_group(br); 1681 net = dev_net(br->dev); 1682 } 1683 1684 skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL); 1685 if (!skb) 1686 goto out_err; 1687 1688 err = -EMSGSIZE; 1689 nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0); 1690 if (!nlh) 1691 goto out_err; 1692 bvm = nlmsg_data(nlh); 1693 memset(bvm, 0, sizeof(*bvm)); 1694 bvm->family = AF_BRIDGE; 1695 bvm->ifindex = ifindex; 1696 1697 switch (cmd) { 1698 case RTM_NEWVLAN: 1699 /* need to find the vlan due to flags/options */ 1700 v = br_vlan_find(vg, vid); 1701 if (!v || !br_vlan_should_use(v)) 1702 goto out_kfree; 1703 1704 flags = v->flags; 1705 if (br_get_pvid(vg) == v->vid) 1706 flags |= BRIDGE_VLAN_INFO_PVID; 1707 break; 1708 case RTM_DELVLAN: 1709 break; 1710 default: 1711 goto out_kfree; 1712 } 1713 1714 if (!br_vlan_fill_vids(skb, vid, vid_range, v, flags, false)) 1715 goto out_err; 1716 1717 nlmsg_end(skb, nlh); 1718 rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL); 1719 return; 1720 1721 out_err: 1722 rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err); 1723 out_kfree: 1724 kfree_skb(skb); 1725 } 1726 1727 /* check if v_curr can enter a range ending in range_end */ 1728 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1729 const struct net_bridge_vlan *range_end) 1730 { 1731 return v_curr->vid - range_end->vid == 1 && 1732 range_end->flags == v_curr->flags && 1733 br_vlan_opts_eq_range(v_curr, range_end); 1734 } 1735 1736 static int br_vlan_dump_dev(const struct net_device *dev, 1737 struct sk_buff *skb, 1738 struct netlink_callback *cb, 1739 u32 dump_flags) 1740 { 1741 struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL; 1742 bool dump_stats = !!(dump_flags & BRIDGE_VLANDB_DUMPF_STATS); 1743 struct net_bridge_vlan_group *vg; 1744 int idx = 0, s_idx = cb->args[1]; 1745 struct nlmsghdr *nlh = NULL; 1746 struct net_bridge_port *p; 1747 struct br_vlan_msg *bvm; 1748 struct net_bridge *br; 1749 int err = 0; 1750 u16 pvid; 1751 1752 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) 1753 return -EINVAL; 1754 1755 if (netif_is_bridge_master(dev)) { 1756 br = netdev_priv(dev); 1757 vg = br_vlan_group_rcu(br); 1758 p = NULL; 1759 } else { 1760 p = br_port_get_rcu(dev); 1761 if (WARN_ON(!p)) 1762 return -EINVAL; 1763 vg = nbp_vlan_group_rcu(p); 1764 br = p->br; 1765 } 1766 1767 if (!vg) 1768 return 0; 1769 1770 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 1771 RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI); 1772 if (!nlh) 1773 return -EMSGSIZE; 1774 bvm = nlmsg_data(nlh); 1775 memset(bvm, 0, sizeof(*bvm)); 1776 bvm->family = PF_BRIDGE; 1777 bvm->ifindex = dev->ifindex; 1778 pvid = br_get_pvid(vg); 1779 1780 /* idx must stay at range's beginning until it is filled in */ 1781 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 1782 if (!br_vlan_should_use(v)) 1783 continue; 1784 if (idx < s_idx) { 1785 idx++; 1786 continue; 1787 } 1788 1789 if (!range_start) { 1790 range_start = v; 1791 range_end = v; 1792 continue; 1793 } 1794 1795 if (dump_stats || v->vid == pvid || 1796 !br_vlan_can_enter_range(v, range_end)) { 1797 u16 vlan_flags = br_vlan_flags(range_start, pvid); 1798 1799 if (!br_vlan_fill_vids(skb, range_start->vid, 1800 range_end->vid, range_start, 1801 vlan_flags, dump_stats)) { 1802 err = -EMSGSIZE; 1803 break; 1804 } 1805 /* advance number of filled vlans */ 1806 idx += range_end->vid - range_start->vid + 1; 1807 1808 range_start = v; 1809 } 1810 range_end = v; 1811 } 1812 1813 /* err will be 0 and range_start will be set in 3 cases here: 1814 * - first vlan (range_start == range_end) 1815 * - last vlan (range_start == range_end, not in range) 1816 * - last vlan range (range_start != range_end, in range) 1817 */ 1818 if (!err && range_start && 1819 !br_vlan_fill_vids(skb, range_start->vid, range_end->vid, 1820 range_start, br_vlan_flags(range_start, pvid), 1821 dump_stats)) 1822 err = -EMSGSIZE; 1823 1824 cb->args[1] = err ? idx : 0; 1825 1826 nlmsg_end(skb, nlh); 1827 1828 return err; 1829 } 1830 1831 static const struct nla_policy br_vlan_db_dump_pol[BRIDGE_VLANDB_DUMP_MAX + 1] = { 1832 [BRIDGE_VLANDB_DUMP_FLAGS] = { .type = NLA_U32 }, 1833 }; 1834 1835 static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb) 1836 { 1837 struct nlattr *dtb[BRIDGE_VLANDB_DUMP_MAX + 1]; 1838 int idx = 0, err = 0, s_idx = cb->args[0]; 1839 struct net *net = sock_net(skb->sk); 1840 struct br_vlan_msg *bvm; 1841 struct net_device *dev; 1842 u32 dump_flags = 0; 1843 1844 err = nlmsg_parse(cb->nlh, sizeof(*bvm), dtb, BRIDGE_VLANDB_DUMP_MAX, 1845 br_vlan_db_dump_pol, cb->extack); 1846 if (err < 0) 1847 return err; 1848 1849 bvm = nlmsg_data(cb->nlh); 1850 if (dtb[BRIDGE_VLANDB_DUMP_FLAGS]) 1851 dump_flags = nla_get_u32(dtb[BRIDGE_VLANDB_DUMP_FLAGS]); 1852 1853 rcu_read_lock(); 1854 if (bvm->ifindex) { 1855 dev = dev_get_by_index_rcu(net, bvm->ifindex); 1856 if (!dev) { 1857 err = -ENODEV; 1858 goto out_err; 1859 } 1860 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 1861 if (err && err != -EMSGSIZE) 1862 goto out_err; 1863 } else { 1864 for_each_netdev_rcu(net, dev) { 1865 if (idx < s_idx) 1866 goto skip; 1867 1868 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 1869 if (err == -EMSGSIZE) 1870 break; 1871 skip: 1872 idx++; 1873 } 1874 } 1875 cb->args[0] = idx; 1876 rcu_read_unlock(); 1877 1878 return skb->len; 1879 1880 out_err: 1881 rcu_read_unlock(); 1882 1883 return err; 1884 } 1885 1886 static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = { 1887 [BRIDGE_VLANDB_ENTRY_INFO] = { .type = NLA_EXACT_LEN, 1888 .len = sizeof(struct bridge_vlan_info) }, 1889 [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 }, 1890 [BRIDGE_VLANDB_ENTRY_STATE] = { .type = NLA_U8 }, 1891 [BRIDGE_VLANDB_ENTRY_TUNNEL_INFO] = { .type = NLA_NESTED }, 1892 }; 1893 1894 static int br_vlan_rtm_process_one(struct net_device *dev, 1895 const struct nlattr *attr, 1896 int cmd, struct netlink_ext_ack *extack) 1897 { 1898 struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL; 1899 struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1]; 1900 bool changed = false, skip_processing = false; 1901 struct net_bridge_vlan_group *vg; 1902 struct net_bridge_port *p = NULL; 1903 int err = 0, cmdmap = 0; 1904 struct net_bridge *br; 1905 1906 if (netif_is_bridge_master(dev)) { 1907 br = netdev_priv(dev); 1908 vg = br_vlan_group(br); 1909 } else { 1910 p = br_port_get_rtnl(dev); 1911 if (WARN_ON(!p)) 1912 return -ENODEV; 1913 br = p->br; 1914 vg = nbp_vlan_group(p); 1915 } 1916 1917 if (WARN_ON(!vg)) 1918 return -ENODEV; 1919 1920 err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr, 1921 br_vlan_db_policy, extack); 1922 if (err) 1923 return err; 1924 1925 if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) { 1926 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info"); 1927 return -EINVAL; 1928 } 1929 memset(&vrange_end, 0, sizeof(vrange_end)); 1930 1931 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]); 1932 if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 1933 BRIDGE_VLAN_INFO_RANGE_END)) { 1934 NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls"); 1935 return -EINVAL; 1936 } 1937 if (!br_vlan_valid_id(vinfo->vid, extack)) 1938 return -EINVAL; 1939 1940 if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) { 1941 vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]); 1942 /* validate user-provided flags without RANGE_BEGIN */ 1943 vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags; 1944 vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; 1945 1946 /* vinfo_last is the range start, vinfo the range end */ 1947 vinfo_last = vinfo; 1948 vinfo = &vrange_end; 1949 1950 if (!br_vlan_valid_id(vinfo->vid, extack) || 1951 !br_vlan_valid_range(vinfo, vinfo_last, extack)) 1952 return -EINVAL; 1953 } 1954 1955 switch (cmd) { 1956 case RTM_NEWVLAN: 1957 cmdmap = RTM_SETLINK; 1958 skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS); 1959 break; 1960 case RTM_DELVLAN: 1961 cmdmap = RTM_DELLINK; 1962 break; 1963 } 1964 1965 if (!skip_processing) { 1966 struct bridge_vlan_info *tmp_last = vinfo_last; 1967 1968 /* br_process_vlan_info may overwrite vinfo_last */ 1969 err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last, 1970 &changed, extack); 1971 1972 /* notify first if anything changed */ 1973 if (changed) 1974 br_ifinfo_notify(cmdmap, br, p); 1975 1976 if (err) 1977 return err; 1978 } 1979 1980 /* deal with options */ 1981 if (cmd == RTM_NEWVLAN) { 1982 struct net_bridge_vlan *range_start, *range_end; 1983 1984 if (vinfo_last) { 1985 range_start = br_vlan_find(vg, vinfo_last->vid); 1986 range_end = br_vlan_find(vg, vinfo->vid); 1987 } else { 1988 range_start = br_vlan_find(vg, vinfo->vid); 1989 range_end = range_start; 1990 } 1991 1992 err = br_vlan_process_options(br, p, range_start, range_end, 1993 tb, extack); 1994 } 1995 1996 return err; 1997 } 1998 1999 static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh, 2000 struct netlink_ext_ack *extack) 2001 { 2002 struct net *net = sock_net(skb->sk); 2003 struct br_vlan_msg *bvm; 2004 struct net_device *dev; 2005 struct nlattr *attr; 2006 int err, vlans = 0; 2007 int rem; 2008 2009 /* this should validate the header and check for remaining bytes */ 2010 err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL, 2011 extack); 2012 if (err < 0) 2013 return err; 2014 2015 bvm = nlmsg_data(nlh); 2016 dev = __dev_get_by_index(net, bvm->ifindex); 2017 if (!dev) 2018 return -ENODEV; 2019 2020 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) { 2021 NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port"); 2022 return -EINVAL; 2023 } 2024 2025 nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) { 2026 if (nla_type(attr) != BRIDGE_VLANDB_ENTRY) 2027 continue; 2028 2029 vlans++; 2030 err = br_vlan_rtm_process_one(dev, attr, nlh->nlmsg_type, 2031 extack); 2032 if (err) 2033 break; 2034 } 2035 if (!vlans) { 2036 NL_SET_ERR_MSG_MOD(extack, "No vlans found to process"); 2037 err = -EINVAL; 2038 } 2039 2040 return err; 2041 } 2042 2043 void br_vlan_rtnl_init(void) 2044 { 2045 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL, 2046 br_vlan_rtm_dump, 0); 2047 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN, 2048 br_vlan_rtm_process, NULL, 0); 2049 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN, 2050 br_vlan_rtm_process, NULL, 0); 2051 } 2052 2053 void br_vlan_rtnl_uninit(void) 2054 { 2055 rtnl_unregister(PF_BRIDGE, RTM_GETVLAN); 2056 rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN); 2057 rtnl_unregister(PF_BRIDGE, RTM_DELVLAN); 2058 } 2059