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_get_proto(const struct net_device *dev, u16 *p_proto) 801 { 802 struct net_bridge *br = netdev_priv(dev); 803 804 *p_proto = ntohs(br->vlan_proto); 805 806 return 0; 807 } 808 EXPORT_SYMBOL_GPL(br_vlan_get_proto); 809 810 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto) 811 { 812 int err = 0; 813 struct net_bridge_port *p; 814 struct net_bridge_vlan *vlan; 815 struct net_bridge_vlan_group *vg; 816 __be16 oldproto; 817 818 if (br->vlan_proto == proto) 819 return 0; 820 821 /* Add VLANs for the new proto to the device filter. */ 822 list_for_each_entry(p, &br->port_list, list) { 823 vg = nbp_vlan_group(p); 824 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 825 err = vlan_vid_add(p->dev, proto, vlan->vid); 826 if (err) 827 goto err_filt; 828 } 829 } 830 831 oldproto = br->vlan_proto; 832 br->vlan_proto = proto; 833 834 recalculate_group_addr(br); 835 br_recalculate_fwd_mask(br); 836 837 /* Delete VLANs for the old proto from the device filter. */ 838 list_for_each_entry(p, &br->port_list, list) { 839 vg = nbp_vlan_group(p); 840 list_for_each_entry(vlan, &vg->vlan_list, vlist) 841 vlan_vid_del(p->dev, oldproto, vlan->vid); 842 } 843 844 return 0; 845 846 err_filt: 847 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist) 848 vlan_vid_del(p->dev, proto, vlan->vid); 849 850 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 851 vg = nbp_vlan_group(p); 852 list_for_each_entry(vlan, &vg->vlan_list, vlist) 853 vlan_vid_del(p->dev, proto, vlan->vid); 854 } 855 856 return err; 857 } 858 859 int br_vlan_set_proto(struct net_bridge *br, unsigned long val) 860 { 861 if (val != ETH_P_8021Q && val != ETH_P_8021AD) 862 return -EPROTONOSUPPORT; 863 864 return __br_vlan_set_proto(br, htons(val)); 865 } 866 867 int br_vlan_set_stats(struct net_bridge *br, unsigned long val) 868 { 869 switch (val) { 870 case 0: 871 case 1: 872 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val); 873 break; 874 default: 875 return -EINVAL; 876 } 877 878 return 0; 879 } 880 881 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val) 882 { 883 struct net_bridge_port *p; 884 885 /* allow to change the option if there are no port vlans configured */ 886 list_for_each_entry(p, &br->port_list, list) { 887 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 888 889 if (vg->num_vlans) 890 return -EBUSY; 891 } 892 893 switch (val) { 894 case 0: 895 case 1: 896 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val); 897 break; 898 default: 899 return -EINVAL; 900 } 901 902 return 0; 903 } 904 905 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid) 906 { 907 struct net_bridge_vlan *v; 908 909 if (vid != vg->pvid) 910 return false; 911 912 v = br_vlan_lookup(&vg->vlan_hash, vid); 913 if (v && br_vlan_should_use(v) && 914 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 915 return true; 916 917 return false; 918 } 919 920 static void br_vlan_disable_default_pvid(struct net_bridge *br) 921 { 922 struct net_bridge_port *p; 923 u16 pvid = br->default_pvid; 924 925 /* Disable default_pvid on all ports where it is still 926 * configured. 927 */ 928 if (vlan_default_pvid(br_vlan_group(br), pvid)) 929 br_vlan_delete(br, pvid); 930 931 list_for_each_entry(p, &br->port_list, list) { 932 if (vlan_default_pvid(nbp_vlan_group(p), pvid)) 933 nbp_vlan_delete(p, pvid); 934 } 935 936 br->default_pvid = 0; 937 } 938 939 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 940 struct netlink_ext_ack *extack) 941 { 942 const struct net_bridge_vlan *pvent; 943 struct net_bridge_vlan_group *vg; 944 struct net_bridge_port *p; 945 unsigned long *changed; 946 bool vlchange; 947 u16 old_pvid; 948 int err = 0; 949 950 if (!pvid) { 951 br_vlan_disable_default_pvid(br); 952 return 0; 953 } 954 955 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL); 956 if (!changed) 957 return -ENOMEM; 958 959 old_pvid = br->default_pvid; 960 961 /* Update default_pvid config only if we do not conflict with 962 * user configuration. 963 */ 964 vg = br_vlan_group(br); 965 pvent = br_vlan_find(vg, pvid); 966 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) && 967 (!pvent || !br_vlan_should_use(pvent))) { 968 err = br_vlan_add(br, pvid, 969 BRIDGE_VLAN_INFO_PVID | 970 BRIDGE_VLAN_INFO_UNTAGGED | 971 BRIDGE_VLAN_INFO_BRENTRY, 972 &vlchange, extack); 973 if (err) 974 goto out; 975 br_vlan_delete(br, old_pvid); 976 set_bit(0, changed); 977 } 978 979 list_for_each_entry(p, &br->port_list, list) { 980 /* Update default_pvid config only if we do not conflict with 981 * user configuration. 982 */ 983 vg = nbp_vlan_group(p); 984 if ((old_pvid && 985 !vlan_default_pvid(vg, old_pvid)) || 986 br_vlan_find(vg, pvid)) 987 continue; 988 989 err = nbp_vlan_add(p, pvid, 990 BRIDGE_VLAN_INFO_PVID | 991 BRIDGE_VLAN_INFO_UNTAGGED, 992 &vlchange, extack); 993 if (err) 994 goto err_port; 995 nbp_vlan_delete(p, old_pvid); 996 set_bit(p->port_no, changed); 997 } 998 999 br->default_pvid = pvid; 1000 1001 out: 1002 bitmap_free(changed); 1003 return err; 1004 1005 err_port: 1006 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 1007 if (!test_bit(p->port_no, changed)) 1008 continue; 1009 1010 if (old_pvid) 1011 nbp_vlan_add(p, old_pvid, 1012 BRIDGE_VLAN_INFO_PVID | 1013 BRIDGE_VLAN_INFO_UNTAGGED, 1014 &vlchange, NULL); 1015 nbp_vlan_delete(p, pvid); 1016 } 1017 1018 if (test_bit(0, changed)) { 1019 if (old_pvid) 1020 br_vlan_add(br, old_pvid, 1021 BRIDGE_VLAN_INFO_PVID | 1022 BRIDGE_VLAN_INFO_UNTAGGED | 1023 BRIDGE_VLAN_INFO_BRENTRY, 1024 &vlchange, NULL); 1025 br_vlan_delete(br, pvid); 1026 } 1027 goto out; 1028 } 1029 1030 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val) 1031 { 1032 u16 pvid = val; 1033 int err = 0; 1034 1035 if (val >= VLAN_VID_MASK) 1036 return -EINVAL; 1037 1038 if (pvid == br->default_pvid) 1039 goto out; 1040 1041 /* Only allow default pvid change when filtering is disabled */ 1042 if (br_opt_get(br, BROPT_VLAN_ENABLED)) { 1043 pr_info_once("Please disable vlan filtering to change default_pvid\n"); 1044 err = -EPERM; 1045 goto out; 1046 } 1047 err = __br_vlan_set_default_pvid(br, pvid, NULL); 1048 out: 1049 return err; 1050 } 1051 1052 int br_vlan_init(struct net_bridge *br) 1053 { 1054 struct net_bridge_vlan_group *vg; 1055 int ret = -ENOMEM; 1056 bool changed; 1057 1058 vg = kzalloc(sizeof(*vg), GFP_KERNEL); 1059 if (!vg) 1060 goto out; 1061 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1062 if (ret) 1063 goto err_rhtbl; 1064 ret = vlan_tunnel_init(vg); 1065 if (ret) 1066 goto err_tunnel_init; 1067 INIT_LIST_HEAD(&vg->vlan_list); 1068 br->vlan_proto = htons(ETH_P_8021Q); 1069 br->default_pvid = 1; 1070 rcu_assign_pointer(br->vlgrp, vg); 1071 ret = br_vlan_add(br, 1, 1072 BRIDGE_VLAN_INFO_PVID | BRIDGE_VLAN_INFO_UNTAGGED | 1073 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL); 1074 if (ret) 1075 goto err_vlan_add; 1076 1077 out: 1078 return ret; 1079 1080 err_vlan_add: 1081 vlan_tunnel_deinit(vg); 1082 err_tunnel_init: 1083 rhashtable_destroy(&vg->vlan_hash); 1084 err_rhtbl: 1085 kfree(vg); 1086 1087 goto out; 1088 } 1089 1090 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack) 1091 { 1092 struct switchdev_attr attr = { 1093 .orig_dev = p->br->dev, 1094 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 1095 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 1096 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED), 1097 }; 1098 struct net_bridge_vlan_group *vg; 1099 int ret = -ENOMEM; 1100 1101 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); 1102 if (!vg) 1103 goto out; 1104 1105 ret = switchdev_port_attr_set(p->dev, &attr); 1106 if (ret && ret != -EOPNOTSUPP) 1107 goto err_vlan_enabled; 1108 1109 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1110 if (ret) 1111 goto err_rhtbl; 1112 ret = vlan_tunnel_init(vg); 1113 if (ret) 1114 goto err_tunnel_init; 1115 INIT_LIST_HEAD(&vg->vlan_list); 1116 rcu_assign_pointer(p->vlgrp, vg); 1117 if (p->br->default_pvid) { 1118 bool changed; 1119 1120 ret = nbp_vlan_add(p, p->br->default_pvid, 1121 BRIDGE_VLAN_INFO_PVID | 1122 BRIDGE_VLAN_INFO_UNTAGGED, 1123 &changed, extack); 1124 if (ret) 1125 goto err_vlan_add; 1126 } 1127 out: 1128 return ret; 1129 1130 err_vlan_add: 1131 RCU_INIT_POINTER(p->vlgrp, NULL); 1132 synchronize_rcu(); 1133 vlan_tunnel_deinit(vg); 1134 err_tunnel_init: 1135 rhashtable_destroy(&vg->vlan_hash); 1136 err_rhtbl: 1137 err_vlan_enabled: 1138 kfree(vg); 1139 1140 goto out; 1141 } 1142 1143 /* Must be protected by RTNL. 1144 * Must be called with vid in range from 1 to 4094 inclusive. 1145 * changed must be true only if the vlan was created or updated 1146 */ 1147 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1148 bool *changed, struct netlink_ext_ack *extack) 1149 { 1150 struct net_bridge_vlan *vlan; 1151 int ret; 1152 1153 ASSERT_RTNL(); 1154 1155 *changed = false; 1156 vlan = br_vlan_find(nbp_vlan_group(port), vid); 1157 if (vlan) { 1158 /* Pass the flags to the hardware bridge */ 1159 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack); 1160 if (ret && ret != -EOPNOTSUPP) 1161 return ret; 1162 *changed = __vlan_add_flags(vlan, flags); 1163 1164 return 0; 1165 } 1166 1167 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 1168 if (!vlan) 1169 return -ENOMEM; 1170 1171 vlan->vid = vid; 1172 vlan->port = port; 1173 ret = __vlan_add(vlan, flags, extack); 1174 if (ret) 1175 kfree(vlan); 1176 else 1177 *changed = true; 1178 1179 return ret; 1180 } 1181 1182 /* Must be protected by RTNL. 1183 * Must be called with vid in range from 1 to 4094 inclusive. 1184 */ 1185 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1186 { 1187 struct net_bridge_vlan *v; 1188 1189 ASSERT_RTNL(); 1190 1191 v = br_vlan_find(nbp_vlan_group(port), vid); 1192 if (!v) 1193 return -ENOENT; 1194 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); 1195 br_fdb_delete_by_port(port->br, port, vid, 0); 1196 1197 return __vlan_del(v); 1198 } 1199 1200 void nbp_vlan_flush(struct net_bridge_port *port) 1201 { 1202 struct net_bridge_vlan_group *vg; 1203 1204 ASSERT_RTNL(); 1205 1206 vg = nbp_vlan_group(port); 1207 __vlan_flush(vg); 1208 RCU_INIT_POINTER(port->vlgrp, NULL); 1209 synchronize_rcu(); 1210 __vlan_group_free(vg); 1211 } 1212 1213 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1214 struct br_vlan_stats *stats) 1215 { 1216 int i; 1217 1218 memset(stats, 0, sizeof(*stats)); 1219 for_each_possible_cpu(i) { 1220 u64 rxpackets, rxbytes, txpackets, txbytes; 1221 struct br_vlan_stats *cpu_stats; 1222 unsigned int start; 1223 1224 cpu_stats = per_cpu_ptr(v->stats, i); 1225 do { 1226 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 1227 rxpackets = cpu_stats->rx_packets; 1228 rxbytes = cpu_stats->rx_bytes; 1229 txbytes = cpu_stats->tx_bytes; 1230 txpackets = cpu_stats->tx_packets; 1231 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 1232 1233 stats->rx_packets += rxpackets; 1234 stats->rx_bytes += rxbytes; 1235 stats->tx_bytes += txbytes; 1236 stats->tx_packets += txpackets; 1237 } 1238 } 1239 1240 static int __br_vlan_get_pvid(const struct net_device *dev, 1241 struct net_bridge_port *p, u16 *p_pvid) 1242 { 1243 struct net_bridge_vlan_group *vg; 1244 1245 if (p) 1246 vg = nbp_vlan_group(p); 1247 else if (netif_is_bridge_master(dev)) 1248 vg = br_vlan_group(netdev_priv(dev)); 1249 else 1250 return -EINVAL; 1251 1252 *p_pvid = br_get_pvid(vg); 1253 return 0; 1254 } 1255 1256 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 1257 { 1258 ASSERT_RTNL(); 1259 1260 return __br_vlan_get_pvid(dev, br_port_get_check_rtnl(dev), p_pvid); 1261 } 1262 EXPORT_SYMBOL_GPL(br_vlan_get_pvid); 1263 1264 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) 1265 { 1266 return __br_vlan_get_pvid(dev, br_port_get_check_rcu(dev), p_pvid); 1267 } 1268 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu); 1269 1270 int br_vlan_get_info(const struct net_device *dev, u16 vid, 1271 struct bridge_vlan_info *p_vinfo) 1272 { 1273 struct net_bridge_vlan_group *vg; 1274 struct net_bridge_vlan *v; 1275 struct net_bridge_port *p; 1276 1277 ASSERT_RTNL(); 1278 p = br_port_get_check_rtnl(dev); 1279 if (p) 1280 vg = nbp_vlan_group(p); 1281 else if (netif_is_bridge_master(dev)) 1282 vg = br_vlan_group(netdev_priv(dev)); 1283 else 1284 return -EINVAL; 1285 1286 v = br_vlan_find(vg, vid); 1287 if (!v) 1288 return -ENOENT; 1289 1290 p_vinfo->vid = vid; 1291 p_vinfo->flags = v->flags; 1292 return 0; 1293 } 1294 EXPORT_SYMBOL_GPL(br_vlan_get_info); 1295 1296 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev) 1297 { 1298 return is_vlan_dev(dev) && 1299 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING); 1300 } 1301 1302 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev, 1303 __always_unused void *data) 1304 { 1305 return br_vlan_is_bind_vlan_dev(dev); 1306 } 1307 1308 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev) 1309 { 1310 int found; 1311 1312 rcu_read_lock(); 1313 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn, 1314 NULL); 1315 rcu_read_unlock(); 1316 1317 return !!found; 1318 } 1319 1320 struct br_vlan_bind_walk_data { 1321 u16 vid; 1322 struct net_device *result; 1323 }; 1324 1325 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev, 1326 void *data_in) 1327 { 1328 struct br_vlan_bind_walk_data *data = data_in; 1329 int found = 0; 1330 1331 if (br_vlan_is_bind_vlan_dev(dev) && 1332 vlan_dev_priv(dev)->vlan_id == data->vid) { 1333 data->result = dev; 1334 found = 1; 1335 } 1336 1337 return found; 1338 } 1339 1340 static struct net_device * 1341 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid) 1342 { 1343 struct br_vlan_bind_walk_data data = { 1344 .vid = vid, 1345 }; 1346 1347 rcu_read_lock(); 1348 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn, 1349 &data); 1350 rcu_read_unlock(); 1351 1352 return data.result; 1353 } 1354 1355 static bool br_vlan_is_dev_up(const struct net_device *dev) 1356 { 1357 return !!(dev->flags & IFF_UP) && netif_oper_up(dev); 1358 } 1359 1360 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br, 1361 struct net_device *vlan_dev) 1362 { 1363 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id; 1364 struct net_bridge_vlan_group *vg; 1365 struct net_bridge_port *p; 1366 bool has_carrier = false; 1367 1368 if (!netif_carrier_ok(br->dev)) { 1369 netif_carrier_off(vlan_dev); 1370 return; 1371 } 1372 1373 list_for_each_entry(p, &br->port_list, list) { 1374 vg = nbp_vlan_group(p); 1375 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) { 1376 has_carrier = true; 1377 break; 1378 } 1379 } 1380 1381 if (has_carrier) 1382 netif_carrier_on(vlan_dev); 1383 else 1384 netif_carrier_off(vlan_dev); 1385 } 1386 1387 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p) 1388 { 1389 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 1390 struct net_bridge_vlan *vlan; 1391 struct net_device *vlan_dev; 1392 1393 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 1394 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, 1395 vlan->vid); 1396 if (vlan_dev) { 1397 if (br_vlan_is_dev_up(p->dev)) { 1398 if (netif_carrier_ok(p->br->dev)) 1399 netif_carrier_on(vlan_dev); 1400 } else { 1401 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1402 } 1403 } 1404 } 1405 } 1406 1407 static void br_vlan_upper_change(struct net_device *dev, 1408 struct net_device *upper_dev, 1409 bool linking) 1410 { 1411 struct net_bridge *br = netdev_priv(dev); 1412 1413 if (!br_vlan_is_bind_vlan_dev(upper_dev)) 1414 return; 1415 1416 if (linking) { 1417 br_vlan_set_vlan_dev_state(br, upper_dev); 1418 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true); 1419 } else { 1420 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, 1421 br_vlan_has_upper_bind_vlan_dev(dev)); 1422 } 1423 } 1424 1425 struct br_vlan_link_state_walk_data { 1426 struct net_bridge *br; 1427 }; 1428 1429 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev, 1430 void *data_in) 1431 { 1432 struct br_vlan_link_state_walk_data *data = data_in; 1433 1434 if (br_vlan_is_bind_vlan_dev(vlan_dev)) 1435 br_vlan_set_vlan_dev_state(data->br, vlan_dev); 1436 1437 return 0; 1438 } 1439 1440 static void br_vlan_link_state_change(struct net_device *dev, 1441 struct net_bridge *br) 1442 { 1443 struct br_vlan_link_state_walk_data data = { 1444 .br = br 1445 }; 1446 1447 rcu_read_lock(); 1448 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn, 1449 &data); 1450 rcu_read_unlock(); 1451 } 1452 1453 /* Must be protected by RTNL. */ 1454 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid) 1455 { 1456 struct net_device *vlan_dev; 1457 1458 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1459 return; 1460 1461 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid); 1462 if (vlan_dev) 1463 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1464 } 1465 1466 /* Must be protected by RTNL. */ 1467 void br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1468 void *ptr) 1469 { 1470 struct netdev_notifier_changeupper_info *info; 1471 struct net_bridge *br; 1472 1473 switch (event) { 1474 case NETDEV_CHANGEUPPER: 1475 info = ptr; 1476 br_vlan_upper_change(dev, info->upper_dev, info->linking); 1477 break; 1478 1479 case NETDEV_CHANGE: 1480 case NETDEV_UP: 1481 br = netdev_priv(dev); 1482 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING)) 1483 return; 1484 br_vlan_link_state_change(dev, br); 1485 break; 1486 } 1487 } 1488 1489 /* Must be protected by RTNL. */ 1490 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event) 1491 { 1492 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1493 return; 1494 1495 switch (event) { 1496 case NETDEV_CHANGE: 1497 case NETDEV_DOWN: 1498 case NETDEV_UP: 1499 br_vlan_set_all_vlan_dev_state(p); 1500 break; 1501 } 1502 } 1503