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, u16 vid) 38 { 39 if (vg->pvid == vid) 40 return false; 41 42 smp_wmb(); 43 vg->pvid = vid; 44 45 return true; 46 } 47 48 static bool __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid) 49 { 50 if (vg->pvid != vid) 51 return false; 52 53 smp_wmb(); 54 vg->pvid = 0; 55 56 return true; 57 } 58 59 /* return true if anything changed, false otherwise */ 60 static bool __vlan_add_flags(struct net_bridge_vlan *v, u16 flags) 61 { 62 struct net_bridge_vlan_group *vg; 63 u16 old_flags = v->flags; 64 bool ret; 65 66 if (br_vlan_is_master(v)) 67 vg = br_vlan_group(v->br); 68 else 69 vg = nbp_vlan_group(v->port); 70 71 if (flags & BRIDGE_VLAN_INFO_PVID) 72 ret = __vlan_add_pvid(vg, v->vid); 73 else 74 ret = __vlan_delete_pvid(vg, v->vid); 75 76 if (flags & BRIDGE_VLAN_INFO_UNTAGGED) 77 v->flags |= BRIDGE_VLAN_INFO_UNTAGGED; 78 else 79 v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED; 80 81 return ret || !!(old_flags ^ v->flags); 82 } 83 84 static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br, 85 struct net_bridge_vlan *v, u16 flags, 86 struct netlink_ext_ack *extack) 87 { 88 int err; 89 90 /* Try switchdev op first. In case it is not supported, fallback to 91 * 8021q add. 92 */ 93 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack); 94 if (err == -EOPNOTSUPP) 95 return vlan_vid_add(dev, br->vlan_proto, v->vid); 96 v->priv_flags |= BR_VLFLAG_ADDED_BY_SWITCHDEV; 97 return err; 98 } 99 100 static void __vlan_add_list(struct net_bridge_vlan *v) 101 { 102 struct net_bridge_vlan_group *vg; 103 struct list_head *headp, *hpos; 104 struct net_bridge_vlan *vent; 105 106 if (br_vlan_is_master(v)) 107 vg = br_vlan_group(v->br); 108 else 109 vg = nbp_vlan_group(v->port); 110 111 headp = &vg->vlan_list; 112 list_for_each_prev(hpos, headp) { 113 vent = list_entry(hpos, struct net_bridge_vlan, vlist); 114 if (v->vid < vent->vid) 115 continue; 116 else 117 break; 118 } 119 list_add_rcu(&v->vlist, hpos); 120 } 121 122 static void __vlan_del_list(struct net_bridge_vlan *v) 123 { 124 list_del_rcu(&v->vlist); 125 } 126 127 static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br, 128 const struct net_bridge_vlan *v) 129 { 130 int err; 131 132 /* Try switchdev op first. In case it is not supported, fallback to 133 * 8021q del. 134 */ 135 err = br_switchdev_port_vlan_del(dev, v->vid); 136 if (!(v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV)) 137 vlan_vid_del(dev, br->vlan_proto, v->vid); 138 return err == -EOPNOTSUPP ? 0 : err; 139 } 140 141 /* Returns a master vlan, if it didn't exist it gets created. In all cases a 142 * a reference is taken to the master vlan before returning. 143 */ 144 static struct net_bridge_vlan * 145 br_vlan_get_master(struct net_bridge *br, u16 vid, 146 struct netlink_ext_ack *extack) 147 { 148 struct net_bridge_vlan_group *vg; 149 struct net_bridge_vlan *masterv; 150 151 vg = br_vlan_group(br); 152 masterv = br_vlan_find(vg, vid); 153 if (!masterv) { 154 bool changed; 155 156 /* missing global ctx, create it now */ 157 if (br_vlan_add(br, vid, 0, &changed, extack)) 158 return NULL; 159 masterv = br_vlan_find(vg, vid); 160 if (WARN_ON(!masterv)) 161 return NULL; 162 refcount_set(&masterv->refcnt, 1); 163 return masterv; 164 } 165 refcount_inc(&masterv->refcnt); 166 167 return masterv; 168 } 169 170 static void br_master_vlan_rcu_free(struct rcu_head *rcu) 171 { 172 struct net_bridge_vlan *v; 173 174 v = container_of(rcu, struct net_bridge_vlan, rcu); 175 WARN_ON(!br_vlan_is_master(v)); 176 free_percpu(v->stats); 177 v->stats = NULL; 178 kfree(v); 179 } 180 181 static void br_vlan_put_master(struct net_bridge_vlan *masterv) 182 { 183 struct net_bridge_vlan_group *vg; 184 185 if (!br_vlan_is_master(masterv)) 186 return; 187 188 vg = br_vlan_group(masterv->br); 189 if (refcount_dec_and_test(&masterv->refcnt)) { 190 rhashtable_remove_fast(&vg->vlan_hash, 191 &masterv->vnode, br_vlan_rht_params); 192 __vlan_del_list(masterv); 193 call_rcu(&masterv->rcu, br_master_vlan_rcu_free); 194 } 195 } 196 197 static void nbp_vlan_rcu_free(struct rcu_head *rcu) 198 { 199 struct net_bridge_vlan *v; 200 201 v = container_of(rcu, struct net_bridge_vlan, rcu); 202 WARN_ON(br_vlan_is_master(v)); 203 /* if we had per-port stats configured then free them here */ 204 if (v->priv_flags & BR_VLFLAG_PER_PORT_STATS) 205 free_percpu(v->stats); 206 v->stats = NULL; 207 kfree(v); 208 } 209 210 /* This is the shared VLAN add function which works for both ports and bridge 211 * devices. There are four possible calls to this function in terms of the 212 * vlan entry type: 213 * 1. vlan is being added on a port (no master flags, global entry exists) 214 * 2. vlan is being added on a bridge (both master and brentry flags) 215 * 3. vlan is being added on a port, but a global entry didn't exist which 216 * is being created right now (master flag set, brentry flag unset), the 217 * global entry is used for global per-vlan features, but not for filtering 218 * 4. same as 3 but with both master and brentry flags set so the entry 219 * will be used for filtering in both the port and the bridge 220 */ 221 static int __vlan_add(struct net_bridge_vlan *v, u16 flags, 222 struct netlink_ext_ack *extack) 223 { 224 struct net_bridge_vlan *masterv = NULL; 225 struct net_bridge_port *p = NULL; 226 struct net_bridge_vlan_group *vg; 227 struct net_device *dev; 228 struct net_bridge *br; 229 int err; 230 231 if (br_vlan_is_master(v)) { 232 br = v->br; 233 dev = br->dev; 234 vg = br_vlan_group(br); 235 } else { 236 p = v->port; 237 br = p->br; 238 dev = p->dev; 239 vg = nbp_vlan_group(p); 240 } 241 242 if (p) { 243 /* Add VLAN to the device filter if it is supported. 244 * This ensures tagged traffic enters the bridge when 245 * promiscuous mode is disabled by br_manage_promisc(). 246 */ 247 err = __vlan_vid_add(dev, br, v, flags, extack); 248 if (err) 249 goto out; 250 251 /* need to work on the master vlan too */ 252 if (flags & BRIDGE_VLAN_INFO_MASTER) { 253 bool changed; 254 255 err = br_vlan_add(br, v->vid, 256 flags | BRIDGE_VLAN_INFO_BRENTRY, 257 &changed, extack); 258 if (err) 259 goto out_filt; 260 } 261 262 masterv = br_vlan_get_master(br, v->vid, extack); 263 if (!masterv) 264 goto out_filt; 265 v->brvlan = masterv; 266 if (br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)) { 267 v->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats); 268 if (!v->stats) { 269 err = -ENOMEM; 270 goto out_filt; 271 } 272 v->priv_flags |= BR_VLFLAG_PER_PORT_STATS; 273 } else { 274 v->stats = masterv->stats; 275 } 276 } else { 277 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack); 278 if (err && err != -EOPNOTSUPP) 279 goto out; 280 } 281 282 /* Add the dev mac and count the vlan only if it's usable */ 283 if (br_vlan_should_use(v)) { 284 err = br_fdb_insert(br, p, dev->dev_addr, v->vid); 285 if (err) { 286 br_err(br, "failed insert local address into bridge forwarding table\n"); 287 goto out_filt; 288 } 289 vg->num_vlans++; 290 } 291 292 err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode, 293 br_vlan_rht_params); 294 if (err) 295 goto out_fdb_insert; 296 297 __vlan_add_list(v); 298 __vlan_add_flags(v, flags); 299 300 if (p) 301 nbp_vlan_set_vlan_dev_state(p, v->vid); 302 out: 303 return err; 304 305 out_fdb_insert: 306 if (br_vlan_should_use(v)) { 307 br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid); 308 vg->num_vlans--; 309 } 310 311 out_filt: 312 if (p) { 313 __vlan_vid_del(dev, br, v); 314 if (masterv) { 315 if (v->stats && masterv->stats != v->stats) 316 free_percpu(v->stats); 317 v->stats = NULL; 318 319 br_vlan_put_master(masterv); 320 v->brvlan = NULL; 321 } 322 } else { 323 br_switchdev_port_vlan_del(dev, v->vid); 324 } 325 326 goto out; 327 } 328 329 static int __vlan_del(struct net_bridge_vlan *v) 330 { 331 struct net_bridge_vlan *masterv = v; 332 struct net_bridge_vlan_group *vg; 333 struct net_bridge_port *p = NULL; 334 int err = 0; 335 336 if (br_vlan_is_master(v)) { 337 vg = br_vlan_group(v->br); 338 } else { 339 p = v->port; 340 vg = nbp_vlan_group(v->port); 341 masterv = v->brvlan; 342 } 343 344 __vlan_delete_pvid(vg, v->vid); 345 if (p) { 346 err = __vlan_vid_del(p->dev, p->br, v); 347 if (err) 348 goto out; 349 } else { 350 err = br_switchdev_port_vlan_del(v->br->dev, v->vid); 351 if (err && err != -EOPNOTSUPP) 352 goto out; 353 err = 0; 354 } 355 356 if (br_vlan_should_use(v)) { 357 v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY; 358 vg->num_vlans--; 359 } 360 361 if (masterv != v) { 362 vlan_tunnel_info_del(vg, v); 363 rhashtable_remove_fast(&vg->vlan_hash, &v->vnode, 364 br_vlan_rht_params); 365 __vlan_del_list(v); 366 nbp_vlan_set_vlan_dev_state(p, v->vid); 367 call_rcu(&v->rcu, nbp_vlan_rcu_free); 368 } 369 370 br_vlan_put_master(masterv); 371 out: 372 return err; 373 } 374 375 static void __vlan_group_free(struct net_bridge_vlan_group *vg) 376 { 377 WARN_ON(!list_empty(&vg->vlan_list)); 378 rhashtable_destroy(&vg->vlan_hash); 379 vlan_tunnel_deinit(vg); 380 kfree(vg); 381 } 382 383 static void __vlan_flush(struct net_bridge_vlan_group *vg) 384 { 385 struct net_bridge_vlan *vlan, *tmp; 386 387 __vlan_delete_pvid(vg, vg->pvid); 388 list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) 389 __vlan_del(vlan); 390 } 391 392 struct sk_buff *br_handle_vlan(struct net_bridge *br, 393 const struct net_bridge_port *p, 394 struct net_bridge_vlan_group *vg, 395 struct sk_buff *skb) 396 { 397 struct br_vlan_stats *stats; 398 struct net_bridge_vlan *v; 399 u16 vid; 400 401 /* If this packet was not filtered at input, let it pass */ 402 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 403 goto out; 404 405 /* At this point, we know that the frame was filtered and contains 406 * a valid vlan id. If the vlan id has untagged flag set, 407 * send untagged; otherwise, send tagged. 408 */ 409 br_vlan_get_tag(skb, &vid); 410 v = br_vlan_find(vg, vid); 411 /* Vlan entry must be configured at this point. The 412 * only exception is the bridge is set in promisc mode and the 413 * packet is destined for the bridge device. In this case 414 * pass the packet as is. 415 */ 416 if (!v || !br_vlan_should_use(v)) { 417 if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) { 418 goto out; 419 } else { 420 kfree_skb(skb); 421 return NULL; 422 } 423 } 424 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 425 stats = this_cpu_ptr(v->stats); 426 u64_stats_update_begin(&stats->syncp); 427 stats->tx_bytes += skb->len; 428 stats->tx_packets++; 429 u64_stats_update_end(&stats->syncp); 430 } 431 432 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 433 __vlan_hwaccel_clear_tag(skb); 434 435 if (p && (p->flags & BR_VLAN_TUNNEL) && 436 br_handle_egress_vlan_tunnel(skb, v)) { 437 kfree_skb(skb); 438 return NULL; 439 } 440 out: 441 return skb; 442 } 443 444 /* Called under RCU */ 445 static bool __allowed_ingress(const struct net_bridge *br, 446 struct net_bridge_vlan_group *vg, 447 struct sk_buff *skb, u16 *vid) 448 { 449 struct br_vlan_stats *stats; 450 struct net_bridge_vlan *v; 451 bool tagged; 452 453 BR_INPUT_SKB_CB(skb)->vlan_filtered = true; 454 /* If vlan tx offload is disabled on bridge device and frame was 455 * sent from vlan device on the bridge device, it does not have 456 * HW accelerated vlan tag. 457 */ 458 if (unlikely(!skb_vlan_tag_present(skb) && 459 skb->protocol == br->vlan_proto)) { 460 skb = skb_vlan_untag(skb); 461 if (unlikely(!skb)) 462 return false; 463 } 464 465 if (!br_vlan_get_tag(skb, vid)) { 466 /* Tagged frame */ 467 if (skb->vlan_proto != br->vlan_proto) { 468 /* Protocol-mismatch, empty out vlan_tci for new tag */ 469 skb_push(skb, ETH_HLEN); 470 skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, 471 skb_vlan_tag_get(skb)); 472 if (unlikely(!skb)) 473 return false; 474 475 skb_pull(skb, ETH_HLEN); 476 skb_reset_mac_len(skb); 477 *vid = 0; 478 tagged = false; 479 } else { 480 tagged = true; 481 } 482 } else { 483 /* Untagged frame */ 484 tagged = false; 485 } 486 487 if (!*vid) { 488 u16 pvid = br_get_pvid(vg); 489 490 /* Frame had a tag with VID 0 or did not have a tag. 491 * See if pvid is set on this port. That tells us which 492 * vlan untagged or priority-tagged traffic belongs to. 493 */ 494 if (!pvid) 495 goto drop; 496 497 /* PVID is set on this port. Any untagged or priority-tagged 498 * ingress frame is considered to belong to this vlan. 499 */ 500 *vid = pvid; 501 if (likely(!tagged)) 502 /* Untagged Frame. */ 503 __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid); 504 else 505 /* Priority-tagged Frame. 506 * At this point, we know that skb->vlan_tci VID 507 * field was 0. 508 * We update only VID field and preserve PCP field. 509 */ 510 skb->vlan_tci |= pvid; 511 512 /* if stats are disabled we can avoid the lookup */ 513 if (!br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) 514 return true; 515 } 516 v = br_vlan_find(vg, *vid); 517 if (!v || !br_vlan_should_use(v)) 518 goto drop; 519 520 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 521 stats = this_cpu_ptr(v->stats); 522 u64_stats_update_begin(&stats->syncp); 523 stats->rx_bytes += skb->len; 524 stats->rx_packets++; 525 u64_stats_update_end(&stats->syncp); 526 } 527 528 return true; 529 530 drop: 531 kfree_skb(skb); 532 return false; 533 } 534 535 bool br_allowed_ingress(const struct net_bridge *br, 536 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 537 u16 *vid) 538 { 539 /* If VLAN filtering is disabled on the bridge, all packets are 540 * permitted. 541 */ 542 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) { 543 BR_INPUT_SKB_CB(skb)->vlan_filtered = false; 544 return true; 545 } 546 547 return __allowed_ingress(br, vg, skb, vid); 548 } 549 550 /* Called under RCU. */ 551 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 552 const struct sk_buff *skb) 553 { 554 const struct net_bridge_vlan *v; 555 u16 vid; 556 557 /* If this packet was not filtered at input, let it pass */ 558 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 559 return true; 560 561 br_vlan_get_tag(skb, &vid); 562 v = br_vlan_find(vg, vid); 563 if (v && br_vlan_should_use(v)) 564 return true; 565 566 return false; 567 } 568 569 /* Called under RCU */ 570 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid) 571 { 572 struct net_bridge_vlan_group *vg; 573 struct net_bridge *br = p->br; 574 575 /* If filtering was disabled at input, let it pass. */ 576 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 577 return true; 578 579 vg = nbp_vlan_group_rcu(p); 580 if (!vg || !vg->num_vlans) 581 return false; 582 583 if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto) 584 *vid = 0; 585 586 if (!*vid) { 587 *vid = br_get_pvid(vg); 588 if (!*vid) 589 return false; 590 591 return true; 592 } 593 594 if (br_vlan_find(vg, *vid)) 595 return true; 596 597 return false; 598 } 599 600 static int br_vlan_add_existing(struct net_bridge *br, 601 struct net_bridge_vlan_group *vg, 602 struct net_bridge_vlan *vlan, 603 u16 flags, bool *changed, 604 struct netlink_ext_ack *extack) 605 { 606 int err; 607 608 err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack); 609 if (err && err != -EOPNOTSUPP) 610 return err; 611 612 if (!br_vlan_is_brentry(vlan)) { 613 /* Trying to change flags of non-existent bridge vlan */ 614 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) { 615 err = -EINVAL; 616 goto err_flags; 617 } 618 /* It was only kept for port vlans, now make it real */ 619 err = br_fdb_insert(br, NULL, br->dev->dev_addr, 620 vlan->vid); 621 if (err) { 622 br_err(br, "failed to insert local address into bridge forwarding table\n"); 623 goto err_fdb_insert; 624 } 625 626 refcount_inc(&vlan->refcnt); 627 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY; 628 vg->num_vlans++; 629 *changed = true; 630 } 631 632 if (__vlan_add_flags(vlan, flags)) 633 *changed = true; 634 635 return 0; 636 637 err_fdb_insert: 638 err_flags: 639 br_switchdev_port_vlan_del(br->dev, vlan->vid); 640 return err; 641 } 642 643 /* Must be protected by RTNL. 644 * Must be called with vid in range from 1 to 4094 inclusive. 645 * changed must be true only if the vlan was created or updated 646 */ 647 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed, 648 struct netlink_ext_ack *extack) 649 { 650 struct net_bridge_vlan_group *vg; 651 struct net_bridge_vlan *vlan; 652 int ret; 653 654 ASSERT_RTNL(); 655 656 *changed = false; 657 vg = br_vlan_group(br); 658 vlan = br_vlan_find(vg, vid); 659 if (vlan) 660 return br_vlan_add_existing(br, vg, vlan, flags, changed, 661 extack); 662 663 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 664 if (!vlan) 665 return -ENOMEM; 666 667 vlan->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats); 668 if (!vlan->stats) { 669 kfree(vlan); 670 return -ENOMEM; 671 } 672 vlan->vid = vid; 673 vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER; 674 vlan->flags &= ~BRIDGE_VLAN_INFO_PVID; 675 vlan->br = br; 676 if (flags & BRIDGE_VLAN_INFO_BRENTRY) 677 refcount_set(&vlan->refcnt, 1); 678 ret = __vlan_add(vlan, flags, extack); 679 if (ret) { 680 free_percpu(vlan->stats); 681 kfree(vlan); 682 } else { 683 *changed = true; 684 } 685 686 return ret; 687 } 688 689 /* Must be protected by RTNL. 690 * Must be called with vid in range from 1 to 4094 inclusive. 691 */ 692 int br_vlan_delete(struct net_bridge *br, u16 vid) 693 { 694 struct net_bridge_vlan_group *vg; 695 struct net_bridge_vlan *v; 696 697 ASSERT_RTNL(); 698 699 vg = br_vlan_group(br); 700 v = br_vlan_find(vg, vid); 701 if (!v || !br_vlan_is_brentry(v)) 702 return -ENOENT; 703 704 br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid); 705 br_fdb_delete_by_port(br, NULL, vid, 0); 706 707 vlan_tunnel_info_del(vg, v); 708 709 return __vlan_del(v); 710 } 711 712 void br_vlan_flush(struct net_bridge *br) 713 { 714 struct net_bridge_vlan_group *vg; 715 716 ASSERT_RTNL(); 717 718 vg = br_vlan_group(br); 719 __vlan_flush(vg); 720 RCU_INIT_POINTER(br->vlgrp, NULL); 721 synchronize_rcu(); 722 __vlan_group_free(vg); 723 } 724 725 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid) 726 { 727 if (!vg) 728 return NULL; 729 730 return br_vlan_lookup(&vg->vlan_hash, vid); 731 } 732 733 /* Must be protected by RTNL. */ 734 static void recalculate_group_addr(struct net_bridge *br) 735 { 736 if (br_opt_get(br, BROPT_GROUP_ADDR_SET)) 737 return; 738 739 spin_lock_bh(&br->lock); 740 if (!br_opt_get(br, BROPT_VLAN_ENABLED) || 741 br->vlan_proto == htons(ETH_P_8021Q)) { 742 /* Bridge Group Address */ 743 br->group_addr[5] = 0x00; 744 } else { /* vlan_enabled && ETH_P_8021AD */ 745 /* Provider Bridge Group Address */ 746 br->group_addr[5] = 0x08; 747 } 748 spin_unlock_bh(&br->lock); 749 } 750 751 /* Must be protected by RTNL. */ 752 void br_recalculate_fwd_mask(struct net_bridge *br) 753 { 754 if (!br_opt_get(br, BROPT_VLAN_ENABLED) || 755 br->vlan_proto == htons(ETH_P_8021Q)) 756 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT; 757 else /* vlan_enabled && ETH_P_8021AD */ 758 br->group_fwd_mask_required = BR_GROUPFWD_8021AD & 759 ~(1u << br->group_addr[5]); 760 } 761 762 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) 763 { 764 struct switchdev_attr attr = { 765 .orig_dev = br->dev, 766 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 767 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 768 .u.vlan_filtering = val, 769 }; 770 int err; 771 772 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val) 773 return 0; 774 775 err = switchdev_port_attr_set(br->dev, &attr); 776 if (err && err != -EOPNOTSUPP) 777 return err; 778 779 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val); 780 br_manage_promisc(br); 781 recalculate_group_addr(br); 782 br_recalculate_fwd_mask(br); 783 784 return 0; 785 } 786 787 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) 788 { 789 return __br_vlan_filter_toggle(br, val); 790 } 791 792 bool br_vlan_enabled(const struct net_device *dev) 793 { 794 struct net_bridge *br = netdev_priv(dev); 795 796 return br_opt_get(br, BROPT_VLAN_ENABLED); 797 } 798 EXPORT_SYMBOL_GPL(br_vlan_enabled); 799 800 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto) 801 { 802 int err = 0; 803 struct net_bridge_port *p; 804 struct net_bridge_vlan *vlan; 805 struct net_bridge_vlan_group *vg; 806 __be16 oldproto; 807 808 if (br->vlan_proto == proto) 809 return 0; 810 811 /* Add VLANs for the new proto to the device filter. */ 812 list_for_each_entry(p, &br->port_list, list) { 813 vg = nbp_vlan_group(p); 814 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 815 err = vlan_vid_add(p->dev, proto, vlan->vid); 816 if (err) 817 goto err_filt; 818 } 819 } 820 821 oldproto = br->vlan_proto; 822 br->vlan_proto = proto; 823 824 recalculate_group_addr(br); 825 br_recalculate_fwd_mask(br); 826 827 /* Delete VLANs for the old proto from the device filter. */ 828 list_for_each_entry(p, &br->port_list, list) { 829 vg = nbp_vlan_group(p); 830 list_for_each_entry(vlan, &vg->vlan_list, vlist) 831 vlan_vid_del(p->dev, oldproto, vlan->vid); 832 } 833 834 return 0; 835 836 err_filt: 837 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist) 838 vlan_vid_del(p->dev, proto, vlan->vid); 839 840 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 841 vg = nbp_vlan_group(p); 842 list_for_each_entry(vlan, &vg->vlan_list, vlist) 843 vlan_vid_del(p->dev, proto, vlan->vid); 844 } 845 846 return err; 847 } 848 849 int br_vlan_set_proto(struct net_bridge *br, unsigned long val) 850 { 851 if (val != ETH_P_8021Q && val != ETH_P_8021AD) 852 return -EPROTONOSUPPORT; 853 854 return __br_vlan_set_proto(br, htons(val)); 855 } 856 857 int br_vlan_set_stats(struct net_bridge *br, unsigned long val) 858 { 859 switch (val) { 860 case 0: 861 case 1: 862 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val); 863 break; 864 default: 865 return -EINVAL; 866 } 867 868 return 0; 869 } 870 871 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val) 872 { 873 struct net_bridge_port *p; 874 875 /* allow to change the option if there are no port vlans configured */ 876 list_for_each_entry(p, &br->port_list, list) { 877 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 878 879 if (vg->num_vlans) 880 return -EBUSY; 881 } 882 883 switch (val) { 884 case 0: 885 case 1: 886 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val); 887 break; 888 default: 889 return -EINVAL; 890 } 891 892 return 0; 893 } 894 895 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid) 896 { 897 struct net_bridge_vlan *v; 898 899 if (vid != vg->pvid) 900 return false; 901 902 v = br_vlan_lookup(&vg->vlan_hash, vid); 903 if (v && br_vlan_should_use(v) && 904 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 905 return true; 906 907 return false; 908 } 909 910 static void br_vlan_disable_default_pvid(struct net_bridge *br) 911 { 912 struct net_bridge_port *p; 913 u16 pvid = br->default_pvid; 914 915 /* Disable default_pvid on all ports where it is still 916 * configured. 917 */ 918 if (vlan_default_pvid(br_vlan_group(br), pvid)) 919 br_vlan_delete(br, pvid); 920 921 list_for_each_entry(p, &br->port_list, list) { 922 if (vlan_default_pvid(nbp_vlan_group(p), pvid)) 923 nbp_vlan_delete(p, pvid); 924 } 925 926 br->default_pvid = 0; 927 } 928 929 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 930 struct netlink_ext_ack *extack) 931 { 932 const struct net_bridge_vlan *pvent; 933 struct net_bridge_vlan_group *vg; 934 struct net_bridge_port *p; 935 unsigned long *changed; 936 bool vlchange; 937 u16 old_pvid; 938 int err = 0; 939 940 if (!pvid) { 941 br_vlan_disable_default_pvid(br); 942 return 0; 943 } 944 945 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL); 946 if (!changed) 947 return -ENOMEM; 948 949 old_pvid = br->default_pvid; 950 951 /* Update default_pvid config only if we do not conflict with 952 * user configuration. 953 */ 954 vg = br_vlan_group(br); 955 pvent = br_vlan_find(vg, pvid); 956 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) && 957 (!pvent || !br_vlan_should_use(pvent))) { 958 err = br_vlan_add(br, pvid, 959 BRIDGE_VLAN_INFO_PVID | 960 BRIDGE_VLAN_INFO_UNTAGGED | 961 BRIDGE_VLAN_INFO_BRENTRY, 962 &vlchange, extack); 963 if (err) 964 goto out; 965 br_vlan_delete(br, old_pvid); 966 set_bit(0, changed); 967 } 968 969 list_for_each_entry(p, &br->port_list, list) { 970 /* Update default_pvid config only if we do not conflict with 971 * user configuration. 972 */ 973 vg = nbp_vlan_group(p); 974 if ((old_pvid && 975 !vlan_default_pvid(vg, old_pvid)) || 976 br_vlan_find(vg, pvid)) 977 continue; 978 979 err = nbp_vlan_add(p, pvid, 980 BRIDGE_VLAN_INFO_PVID | 981 BRIDGE_VLAN_INFO_UNTAGGED, 982 &vlchange, extack); 983 if (err) 984 goto err_port; 985 nbp_vlan_delete(p, old_pvid); 986 set_bit(p->port_no, changed); 987 } 988 989 br->default_pvid = pvid; 990 991 out: 992 bitmap_free(changed); 993 return err; 994 995 err_port: 996 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 997 if (!test_bit(p->port_no, changed)) 998 continue; 999 1000 if (old_pvid) 1001 nbp_vlan_add(p, old_pvid, 1002 BRIDGE_VLAN_INFO_PVID | 1003 BRIDGE_VLAN_INFO_UNTAGGED, 1004 &vlchange, NULL); 1005 nbp_vlan_delete(p, pvid); 1006 } 1007 1008 if (test_bit(0, changed)) { 1009 if (old_pvid) 1010 br_vlan_add(br, old_pvid, 1011 BRIDGE_VLAN_INFO_PVID | 1012 BRIDGE_VLAN_INFO_UNTAGGED | 1013 BRIDGE_VLAN_INFO_BRENTRY, 1014 &vlchange, NULL); 1015 br_vlan_delete(br, pvid); 1016 } 1017 goto out; 1018 } 1019 1020 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val) 1021 { 1022 u16 pvid = val; 1023 int err = 0; 1024 1025 if (val >= VLAN_VID_MASK) 1026 return -EINVAL; 1027 1028 if (pvid == br->default_pvid) 1029 goto out; 1030 1031 /* Only allow default pvid change when filtering is disabled */ 1032 if (br_opt_get(br, BROPT_VLAN_ENABLED)) { 1033 pr_info_once("Please disable vlan filtering to change default_pvid\n"); 1034 err = -EPERM; 1035 goto out; 1036 } 1037 err = __br_vlan_set_default_pvid(br, pvid, NULL); 1038 out: 1039 return err; 1040 } 1041 1042 int br_vlan_init(struct net_bridge *br) 1043 { 1044 struct net_bridge_vlan_group *vg; 1045 int ret = -ENOMEM; 1046 bool changed; 1047 1048 vg = kzalloc(sizeof(*vg), GFP_KERNEL); 1049 if (!vg) 1050 goto out; 1051 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1052 if (ret) 1053 goto err_rhtbl; 1054 ret = vlan_tunnel_init(vg); 1055 if (ret) 1056 goto err_tunnel_init; 1057 INIT_LIST_HEAD(&vg->vlan_list); 1058 br->vlan_proto = htons(ETH_P_8021Q); 1059 br->default_pvid = 1; 1060 rcu_assign_pointer(br->vlgrp, vg); 1061 ret = br_vlan_add(br, 1, 1062 BRIDGE_VLAN_INFO_PVID | BRIDGE_VLAN_INFO_UNTAGGED | 1063 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL); 1064 if (ret) 1065 goto err_vlan_add; 1066 1067 out: 1068 return ret; 1069 1070 err_vlan_add: 1071 vlan_tunnel_deinit(vg); 1072 err_tunnel_init: 1073 rhashtable_destroy(&vg->vlan_hash); 1074 err_rhtbl: 1075 kfree(vg); 1076 1077 goto out; 1078 } 1079 1080 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack) 1081 { 1082 struct switchdev_attr attr = { 1083 .orig_dev = p->br->dev, 1084 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 1085 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 1086 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED), 1087 }; 1088 struct net_bridge_vlan_group *vg; 1089 int ret = -ENOMEM; 1090 1091 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); 1092 if (!vg) 1093 goto out; 1094 1095 ret = switchdev_port_attr_set(p->dev, &attr); 1096 if (ret && ret != -EOPNOTSUPP) 1097 goto err_vlan_enabled; 1098 1099 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1100 if (ret) 1101 goto err_rhtbl; 1102 ret = vlan_tunnel_init(vg); 1103 if (ret) 1104 goto err_tunnel_init; 1105 INIT_LIST_HEAD(&vg->vlan_list); 1106 rcu_assign_pointer(p->vlgrp, vg); 1107 if (p->br->default_pvid) { 1108 bool changed; 1109 1110 ret = nbp_vlan_add(p, p->br->default_pvid, 1111 BRIDGE_VLAN_INFO_PVID | 1112 BRIDGE_VLAN_INFO_UNTAGGED, 1113 &changed, extack); 1114 if (ret) 1115 goto err_vlan_add; 1116 } 1117 out: 1118 return ret; 1119 1120 err_vlan_add: 1121 RCU_INIT_POINTER(p->vlgrp, NULL); 1122 synchronize_rcu(); 1123 vlan_tunnel_deinit(vg); 1124 err_tunnel_init: 1125 rhashtable_destroy(&vg->vlan_hash); 1126 err_rhtbl: 1127 err_vlan_enabled: 1128 kfree(vg); 1129 1130 goto out; 1131 } 1132 1133 /* Must be protected by RTNL. 1134 * Must be called with vid in range from 1 to 4094 inclusive. 1135 * changed must be true only if the vlan was created or updated 1136 */ 1137 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1138 bool *changed, struct netlink_ext_ack *extack) 1139 { 1140 struct net_bridge_vlan *vlan; 1141 int ret; 1142 1143 ASSERT_RTNL(); 1144 1145 *changed = false; 1146 vlan = br_vlan_find(nbp_vlan_group(port), vid); 1147 if (vlan) { 1148 /* Pass the flags to the hardware bridge */ 1149 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack); 1150 if (ret && ret != -EOPNOTSUPP) 1151 return ret; 1152 *changed = __vlan_add_flags(vlan, flags); 1153 1154 return 0; 1155 } 1156 1157 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 1158 if (!vlan) 1159 return -ENOMEM; 1160 1161 vlan->vid = vid; 1162 vlan->port = port; 1163 ret = __vlan_add(vlan, flags, extack); 1164 if (ret) 1165 kfree(vlan); 1166 else 1167 *changed = true; 1168 1169 return ret; 1170 } 1171 1172 /* Must be protected by RTNL. 1173 * Must be called with vid in range from 1 to 4094 inclusive. 1174 */ 1175 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1176 { 1177 struct net_bridge_vlan *v; 1178 1179 ASSERT_RTNL(); 1180 1181 v = br_vlan_find(nbp_vlan_group(port), vid); 1182 if (!v) 1183 return -ENOENT; 1184 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); 1185 br_fdb_delete_by_port(port->br, port, vid, 0); 1186 1187 return __vlan_del(v); 1188 } 1189 1190 void nbp_vlan_flush(struct net_bridge_port *port) 1191 { 1192 struct net_bridge_vlan_group *vg; 1193 1194 ASSERT_RTNL(); 1195 1196 vg = nbp_vlan_group(port); 1197 __vlan_flush(vg); 1198 RCU_INIT_POINTER(port->vlgrp, NULL); 1199 synchronize_rcu(); 1200 __vlan_group_free(vg); 1201 } 1202 1203 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1204 struct br_vlan_stats *stats) 1205 { 1206 int i; 1207 1208 memset(stats, 0, sizeof(*stats)); 1209 for_each_possible_cpu(i) { 1210 u64 rxpackets, rxbytes, txpackets, txbytes; 1211 struct br_vlan_stats *cpu_stats; 1212 unsigned int start; 1213 1214 cpu_stats = per_cpu_ptr(v->stats, i); 1215 do { 1216 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 1217 rxpackets = cpu_stats->rx_packets; 1218 rxbytes = cpu_stats->rx_bytes; 1219 txbytes = cpu_stats->tx_bytes; 1220 txpackets = cpu_stats->tx_packets; 1221 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 1222 1223 stats->rx_packets += rxpackets; 1224 stats->rx_bytes += rxbytes; 1225 stats->tx_bytes += txbytes; 1226 stats->tx_packets += txpackets; 1227 } 1228 } 1229 1230 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 1231 { 1232 struct net_bridge_vlan_group *vg; 1233 struct net_bridge_port *p; 1234 1235 ASSERT_RTNL(); 1236 p = br_port_get_check_rtnl(dev); 1237 if (p) 1238 vg = nbp_vlan_group(p); 1239 else if (netif_is_bridge_master(dev)) 1240 vg = br_vlan_group(netdev_priv(dev)); 1241 else 1242 return -EINVAL; 1243 1244 *p_pvid = br_get_pvid(vg); 1245 return 0; 1246 } 1247 EXPORT_SYMBOL_GPL(br_vlan_get_pvid); 1248 1249 int br_vlan_get_info(const struct net_device *dev, u16 vid, 1250 struct bridge_vlan_info *p_vinfo) 1251 { 1252 struct net_bridge_vlan_group *vg; 1253 struct net_bridge_vlan *v; 1254 struct net_bridge_port *p; 1255 1256 ASSERT_RTNL(); 1257 p = br_port_get_check_rtnl(dev); 1258 if (p) 1259 vg = nbp_vlan_group(p); 1260 else if (netif_is_bridge_master(dev)) 1261 vg = br_vlan_group(netdev_priv(dev)); 1262 else 1263 return -EINVAL; 1264 1265 v = br_vlan_find(vg, vid); 1266 if (!v) 1267 return -ENOENT; 1268 1269 p_vinfo->vid = vid; 1270 p_vinfo->flags = v->flags; 1271 return 0; 1272 } 1273 EXPORT_SYMBOL_GPL(br_vlan_get_info); 1274 1275 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev) 1276 { 1277 return is_vlan_dev(dev) && 1278 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING); 1279 } 1280 1281 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev, 1282 __always_unused void *data) 1283 { 1284 return br_vlan_is_bind_vlan_dev(dev); 1285 } 1286 1287 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev) 1288 { 1289 int found; 1290 1291 rcu_read_lock(); 1292 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn, 1293 NULL); 1294 rcu_read_unlock(); 1295 1296 return !!found; 1297 } 1298 1299 struct br_vlan_bind_walk_data { 1300 u16 vid; 1301 struct net_device *result; 1302 }; 1303 1304 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev, 1305 void *data_in) 1306 { 1307 struct br_vlan_bind_walk_data *data = data_in; 1308 int found = 0; 1309 1310 if (br_vlan_is_bind_vlan_dev(dev) && 1311 vlan_dev_priv(dev)->vlan_id == data->vid) { 1312 data->result = dev; 1313 found = 1; 1314 } 1315 1316 return found; 1317 } 1318 1319 static struct net_device * 1320 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid) 1321 { 1322 struct br_vlan_bind_walk_data data = { 1323 .vid = vid, 1324 }; 1325 1326 rcu_read_lock(); 1327 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn, 1328 &data); 1329 rcu_read_unlock(); 1330 1331 return data.result; 1332 } 1333 1334 static bool br_vlan_is_dev_up(const struct net_device *dev) 1335 { 1336 return !!(dev->flags & IFF_UP) && netif_oper_up(dev); 1337 } 1338 1339 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br, 1340 struct net_device *vlan_dev) 1341 { 1342 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id; 1343 struct net_bridge_vlan_group *vg; 1344 struct net_bridge_port *p; 1345 bool has_carrier = false; 1346 1347 if (!netif_carrier_ok(br->dev)) { 1348 netif_carrier_off(vlan_dev); 1349 return; 1350 } 1351 1352 list_for_each_entry(p, &br->port_list, list) { 1353 vg = nbp_vlan_group(p); 1354 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) { 1355 has_carrier = true; 1356 break; 1357 } 1358 } 1359 1360 if (has_carrier) 1361 netif_carrier_on(vlan_dev); 1362 else 1363 netif_carrier_off(vlan_dev); 1364 } 1365 1366 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p) 1367 { 1368 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 1369 struct net_bridge_vlan *vlan; 1370 struct net_device *vlan_dev; 1371 1372 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 1373 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, 1374 vlan->vid); 1375 if (vlan_dev) { 1376 if (br_vlan_is_dev_up(p->dev)) { 1377 if (netif_carrier_ok(p->br->dev)) 1378 netif_carrier_on(vlan_dev); 1379 } else { 1380 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1381 } 1382 } 1383 } 1384 } 1385 1386 static void br_vlan_upper_change(struct net_device *dev, 1387 struct net_device *upper_dev, 1388 bool linking) 1389 { 1390 struct net_bridge *br = netdev_priv(dev); 1391 1392 if (!br_vlan_is_bind_vlan_dev(upper_dev)) 1393 return; 1394 1395 if (linking) { 1396 br_vlan_set_vlan_dev_state(br, upper_dev); 1397 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true); 1398 } else { 1399 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, 1400 br_vlan_has_upper_bind_vlan_dev(dev)); 1401 } 1402 } 1403 1404 struct br_vlan_link_state_walk_data { 1405 struct net_bridge *br; 1406 }; 1407 1408 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev, 1409 void *data_in) 1410 { 1411 struct br_vlan_link_state_walk_data *data = data_in; 1412 1413 if (br_vlan_is_bind_vlan_dev(vlan_dev)) 1414 br_vlan_set_vlan_dev_state(data->br, vlan_dev); 1415 1416 return 0; 1417 } 1418 1419 static void br_vlan_link_state_change(struct net_device *dev, 1420 struct net_bridge *br) 1421 { 1422 struct br_vlan_link_state_walk_data data = { 1423 .br = br 1424 }; 1425 1426 rcu_read_lock(); 1427 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn, 1428 &data); 1429 rcu_read_unlock(); 1430 } 1431 1432 /* Must be protected by RTNL. */ 1433 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid) 1434 { 1435 struct net_device *vlan_dev; 1436 1437 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1438 return; 1439 1440 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid); 1441 if (vlan_dev) 1442 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1443 } 1444 1445 /* Must be protected by RTNL. */ 1446 void br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1447 void *ptr) 1448 { 1449 struct netdev_notifier_changeupper_info *info; 1450 struct net_bridge *br; 1451 1452 switch (event) { 1453 case NETDEV_CHANGEUPPER: 1454 info = ptr; 1455 br_vlan_upper_change(dev, info->upper_dev, info->linking); 1456 break; 1457 1458 case NETDEV_CHANGE: 1459 case NETDEV_UP: 1460 br = netdev_priv(dev); 1461 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING)) 1462 return; 1463 br_vlan_link_state_change(dev, br); 1464 break; 1465 } 1466 } 1467 1468 /* Must be protected by RTNL. */ 1469 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event) 1470 { 1471 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1472 return; 1473 1474 switch (event) { 1475 case NETDEV_CHANGE: 1476 case NETDEV_DOWN: 1477 case NETDEV_UP: 1478 br_vlan_set_all_vlan_dev_state(p); 1479 break; 1480 } 1481 } 1482