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 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 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 1292 { 1293 struct net_bridge_vlan_group *vg; 1294 struct net_bridge_port *p; 1295 1296 ASSERT_RTNL(); 1297 p = br_port_get_check_rtnl(dev); 1298 if (p) 1299 vg = nbp_vlan_group(p); 1300 else if (netif_is_bridge_master(dev)) 1301 vg = br_vlan_group(netdev_priv(dev)); 1302 else 1303 return -EINVAL; 1304 1305 *p_pvid = br_get_pvid(vg); 1306 return 0; 1307 } 1308 EXPORT_SYMBOL_GPL(br_vlan_get_pvid); 1309 1310 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) 1311 { 1312 struct net_bridge_vlan_group *vg; 1313 struct net_bridge_port *p; 1314 1315 p = br_port_get_check_rcu(dev); 1316 if (p) 1317 vg = nbp_vlan_group_rcu(p); 1318 else if (netif_is_bridge_master(dev)) 1319 vg = br_vlan_group_rcu(netdev_priv(dev)); 1320 else 1321 return -EINVAL; 1322 1323 *p_pvid = br_get_pvid(vg); 1324 return 0; 1325 } 1326 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu); 1327 1328 int br_vlan_get_info(const struct net_device *dev, u16 vid, 1329 struct bridge_vlan_info *p_vinfo) 1330 { 1331 struct net_bridge_vlan_group *vg; 1332 struct net_bridge_vlan *v; 1333 struct net_bridge_port *p; 1334 1335 ASSERT_RTNL(); 1336 p = br_port_get_check_rtnl(dev); 1337 if (p) 1338 vg = nbp_vlan_group(p); 1339 else if (netif_is_bridge_master(dev)) 1340 vg = br_vlan_group(netdev_priv(dev)); 1341 else 1342 return -EINVAL; 1343 1344 v = br_vlan_find(vg, vid); 1345 if (!v) 1346 return -ENOENT; 1347 1348 p_vinfo->vid = vid; 1349 p_vinfo->flags = v->flags; 1350 if (vid == br_get_pvid(vg)) 1351 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID; 1352 return 0; 1353 } 1354 EXPORT_SYMBOL_GPL(br_vlan_get_info); 1355 1356 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev) 1357 { 1358 return is_vlan_dev(dev) && 1359 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING); 1360 } 1361 1362 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev, 1363 __always_unused struct netdev_nested_priv *priv) 1364 { 1365 return br_vlan_is_bind_vlan_dev(dev); 1366 } 1367 1368 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev) 1369 { 1370 int found; 1371 1372 rcu_read_lock(); 1373 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn, 1374 NULL); 1375 rcu_read_unlock(); 1376 1377 return !!found; 1378 } 1379 1380 struct br_vlan_bind_walk_data { 1381 u16 vid; 1382 struct net_device *result; 1383 }; 1384 1385 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev, 1386 struct netdev_nested_priv *priv) 1387 { 1388 struct br_vlan_bind_walk_data *data = priv->data; 1389 int found = 0; 1390 1391 if (br_vlan_is_bind_vlan_dev(dev) && 1392 vlan_dev_priv(dev)->vlan_id == data->vid) { 1393 data->result = dev; 1394 found = 1; 1395 } 1396 1397 return found; 1398 } 1399 1400 static struct net_device * 1401 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid) 1402 { 1403 struct br_vlan_bind_walk_data data = { 1404 .vid = vid, 1405 }; 1406 struct netdev_nested_priv priv = { 1407 .data = (void *)&data, 1408 }; 1409 1410 rcu_read_lock(); 1411 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn, 1412 &priv); 1413 rcu_read_unlock(); 1414 1415 return data.result; 1416 } 1417 1418 static bool br_vlan_is_dev_up(const struct net_device *dev) 1419 { 1420 return !!(dev->flags & IFF_UP) && netif_oper_up(dev); 1421 } 1422 1423 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br, 1424 struct net_device *vlan_dev) 1425 { 1426 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id; 1427 struct net_bridge_vlan_group *vg; 1428 struct net_bridge_port *p; 1429 bool has_carrier = false; 1430 1431 if (!netif_carrier_ok(br->dev)) { 1432 netif_carrier_off(vlan_dev); 1433 return; 1434 } 1435 1436 list_for_each_entry(p, &br->port_list, list) { 1437 vg = nbp_vlan_group(p); 1438 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) { 1439 has_carrier = true; 1440 break; 1441 } 1442 } 1443 1444 if (has_carrier) 1445 netif_carrier_on(vlan_dev); 1446 else 1447 netif_carrier_off(vlan_dev); 1448 } 1449 1450 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p) 1451 { 1452 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 1453 struct net_bridge_vlan *vlan; 1454 struct net_device *vlan_dev; 1455 1456 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 1457 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, 1458 vlan->vid); 1459 if (vlan_dev) { 1460 if (br_vlan_is_dev_up(p->dev)) { 1461 if (netif_carrier_ok(p->br->dev)) 1462 netif_carrier_on(vlan_dev); 1463 } else { 1464 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1465 } 1466 } 1467 } 1468 } 1469 1470 static void br_vlan_upper_change(struct net_device *dev, 1471 struct net_device *upper_dev, 1472 bool linking) 1473 { 1474 struct net_bridge *br = netdev_priv(dev); 1475 1476 if (!br_vlan_is_bind_vlan_dev(upper_dev)) 1477 return; 1478 1479 if (linking) { 1480 br_vlan_set_vlan_dev_state(br, upper_dev); 1481 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true); 1482 } else { 1483 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, 1484 br_vlan_has_upper_bind_vlan_dev(dev)); 1485 } 1486 } 1487 1488 struct br_vlan_link_state_walk_data { 1489 struct net_bridge *br; 1490 }; 1491 1492 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev, 1493 struct netdev_nested_priv *priv) 1494 { 1495 struct br_vlan_link_state_walk_data *data = priv->data; 1496 1497 if (br_vlan_is_bind_vlan_dev(vlan_dev)) 1498 br_vlan_set_vlan_dev_state(data->br, vlan_dev); 1499 1500 return 0; 1501 } 1502 1503 static void br_vlan_link_state_change(struct net_device *dev, 1504 struct net_bridge *br) 1505 { 1506 struct br_vlan_link_state_walk_data data = { 1507 .br = br 1508 }; 1509 struct netdev_nested_priv priv = { 1510 .data = (void *)&data, 1511 }; 1512 1513 rcu_read_lock(); 1514 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn, 1515 &priv); 1516 rcu_read_unlock(); 1517 } 1518 1519 /* Must be protected by RTNL. */ 1520 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid) 1521 { 1522 struct net_device *vlan_dev; 1523 1524 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1525 return; 1526 1527 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid); 1528 if (vlan_dev) 1529 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1530 } 1531 1532 /* Must be protected by RTNL. */ 1533 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr) 1534 { 1535 struct netdev_notifier_changeupper_info *info; 1536 struct net_bridge *br = netdev_priv(dev); 1537 int vlcmd = 0, ret = 0; 1538 bool changed = false; 1539 1540 switch (event) { 1541 case NETDEV_REGISTER: 1542 ret = br_vlan_add(br, br->default_pvid, 1543 BRIDGE_VLAN_INFO_PVID | 1544 BRIDGE_VLAN_INFO_UNTAGGED | 1545 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL); 1546 vlcmd = RTM_NEWVLAN; 1547 break; 1548 case NETDEV_UNREGISTER: 1549 changed = !br_vlan_delete(br, br->default_pvid); 1550 vlcmd = RTM_DELVLAN; 1551 break; 1552 case NETDEV_CHANGEUPPER: 1553 info = ptr; 1554 br_vlan_upper_change(dev, info->upper_dev, info->linking); 1555 break; 1556 1557 case NETDEV_CHANGE: 1558 case NETDEV_UP: 1559 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING)) 1560 break; 1561 br_vlan_link_state_change(dev, br); 1562 break; 1563 } 1564 if (changed) 1565 br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd); 1566 1567 return ret; 1568 } 1569 1570 /* Must be protected by RTNL. */ 1571 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event) 1572 { 1573 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1574 return; 1575 1576 switch (event) { 1577 case NETDEV_CHANGE: 1578 case NETDEV_DOWN: 1579 case NETDEV_UP: 1580 br_vlan_set_all_vlan_dev_state(p); 1581 break; 1582 } 1583 } 1584 1585 static bool br_vlan_stats_fill(struct sk_buff *skb, 1586 const struct net_bridge_vlan *v) 1587 { 1588 struct br_vlan_stats stats; 1589 struct nlattr *nest; 1590 1591 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_STATS); 1592 if (!nest) 1593 return false; 1594 1595 br_vlan_get_stats(v, &stats); 1596 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES, stats.rx_bytes, 1597 BRIDGE_VLANDB_STATS_PAD) || 1598 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_PACKETS, 1599 stats.rx_packets, BRIDGE_VLANDB_STATS_PAD) || 1600 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES, stats.tx_bytes, 1601 BRIDGE_VLANDB_STATS_PAD) || 1602 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_PACKETS, 1603 stats.tx_packets, BRIDGE_VLANDB_STATS_PAD)) 1604 goto out_err; 1605 1606 nla_nest_end(skb, nest); 1607 1608 return true; 1609 1610 out_err: 1611 nla_nest_cancel(skb, nest); 1612 return false; 1613 } 1614 1615 /* v_opts is used to dump the options which must be equal in the whole range */ 1616 static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range, 1617 const struct net_bridge_vlan *v_opts, 1618 u16 flags, 1619 bool dump_stats) 1620 { 1621 struct bridge_vlan_info info; 1622 struct nlattr *nest; 1623 1624 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY); 1625 if (!nest) 1626 return false; 1627 1628 memset(&info, 0, sizeof(info)); 1629 info.vid = vid; 1630 if (flags & BRIDGE_VLAN_INFO_UNTAGGED) 1631 info.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 1632 if (flags & BRIDGE_VLAN_INFO_PVID) 1633 info.flags |= BRIDGE_VLAN_INFO_PVID; 1634 1635 if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info)) 1636 goto out_err; 1637 1638 if (vid_range && vid < vid_range && 1639 !(flags & BRIDGE_VLAN_INFO_PVID) && 1640 nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range)) 1641 goto out_err; 1642 1643 if (v_opts) { 1644 if (!br_vlan_opts_fill(skb, v_opts)) 1645 goto out_err; 1646 1647 if (dump_stats && !br_vlan_stats_fill(skb, v_opts)) 1648 goto out_err; 1649 } 1650 1651 nla_nest_end(skb, nest); 1652 1653 return true; 1654 1655 out_err: 1656 nla_nest_cancel(skb, nest); 1657 return false; 1658 } 1659 1660 static size_t rtnl_vlan_nlmsg_size(void) 1661 { 1662 return NLMSG_ALIGN(sizeof(struct br_vlan_msg)) 1663 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */ 1664 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */ 1665 + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */ 1666 + br_vlan_opts_nl_size(); /* bridge vlan options */ 1667 } 1668 1669 void br_vlan_notify(const struct net_bridge *br, 1670 const struct net_bridge_port *p, 1671 u16 vid, u16 vid_range, 1672 int cmd) 1673 { 1674 struct net_bridge_vlan_group *vg; 1675 struct net_bridge_vlan *v = NULL; 1676 struct br_vlan_msg *bvm; 1677 struct nlmsghdr *nlh; 1678 struct sk_buff *skb; 1679 int err = -ENOBUFS; 1680 struct net *net; 1681 u16 flags = 0; 1682 int ifindex; 1683 1684 /* right now notifications are done only with rtnl held */ 1685 ASSERT_RTNL(); 1686 1687 if (p) { 1688 ifindex = p->dev->ifindex; 1689 vg = nbp_vlan_group(p); 1690 net = dev_net(p->dev); 1691 } else { 1692 ifindex = br->dev->ifindex; 1693 vg = br_vlan_group(br); 1694 net = dev_net(br->dev); 1695 } 1696 1697 skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL); 1698 if (!skb) 1699 goto out_err; 1700 1701 err = -EMSGSIZE; 1702 nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0); 1703 if (!nlh) 1704 goto out_err; 1705 bvm = nlmsg_data(nlh); 1706 memset(bvm, 0, sizeof(*bvm)); 1707 bvm->family = AF_BRIDGE; 1708 bvm->ifindex = ifindex; 1709 1710 switch (cmd) { 1711 case RTM_NEWVLAN: 1712 /* need to find the vlan due to flags/options */ 1713 v = br_vlan_find(vg, vid); 1714 if (!v || !br_vlan_should_use(v)) 1715 goto out_kfree; 1716 1717 flags = v->flags; 1718 if (br_get_pvid(vg) == v->vid) 1719 flags |= BRIDGE_VLAN_INFO_PVID; 1720 break; 1721 case RTM_DELVLAN: 1722 break; 1723 default: 1724 goto out_kfree; 1725 } 1726 1727 if (!br_vlan_fill_vids(skb, vid, vid_range, v, flags, false)) 1728 goto out_err; 1729 1730 nlmsg_end(skb, nlh); 1731 rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL); 1732 return; 1733 1734 out_err: 1735 rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err); 1736 out_kfree: 1737 kfree_skb(skb); 1738 } 1739 1740 /* check if v_curr can enter a range ending in range_end */ 1741 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1742 const struct net_bridge_vlan *range_end) 1743 { 1744 return v_curr->vid - range_end->vid == 1 && 1745 range_end->flags == v_curr->flags && 1746 br_vlan_opts_eq_range(v_curr, range_end); 1747 } 1748 1749 static int br_vlan_dump_dev(const struct net_device *dev, 1750 struct sk_buff *skb, 1751 struct netlink_callback *cb, 1752 u32 dump_flags) 1753 { 1754 struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL; 1755 bool dump_stats = !!(dump_flags & BRIDGE_VLANDB_DUMPF_STATS); 1756 struct net_bridge_vlan_group *vg; 1757 int idx = 0, s_idx = cb->args[1]; 1758 struct nlmsghdr *nlh = NULL; 1759 struct net_bridge_port *p; 1760 struct br_vlan_msg *bvm; 1761 struct net_bridge *br; 1762 int err = 0; 1763 u16 pvid; 1764 1765 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) 1766 return -EINVAL; 1767 1768 if (netif_is_bridge_master(dev)) { 1769 br = netdev_priv(dev); 1770 vg = br_vlan_group_rcu(br); 1771 p = NULL; 1772 } else { 1773 p = br_port_get_rcu(dev); 1774 if (WARN_ON(!p)) 1775 return -EINVAL; 1776 vg = nbp_vlan_group_rcu(p); 1777 br = p->br; 1778 } 1779 1780 if (!vg) 1781 return 0; 1782 1783 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 1784 RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI); 1785 if (!nlh) 1786 return -EMSGSIZE; 1787 bvm = nlmsg_data(nlh); 1788 memset(bvm, 0, sizeof(*bvm)); 1789 bvm->family = PF_BRIDGE; 1790 bvm->ifindex = dev->ifindex; 1791 pvid = br_get_pvid(vg); 1792 1793 /* idx must stay at range's beginning until it is filled in */ 1794 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 1795 if (!br_vlan_should_use(v)) 1796 continue; 1797 if (idx < s_idx) { 1798 idx++; 1799 continue; 1800 } 1801 1802 if (!range_start) { 1803 range_start = v; 1804 range_end = v; 1805 continue; 1806 } 1807 1808 if (dump_stats || v->vid == pvid || 1809 !br_vlan_can_enter_range(v, range_end)) { 1810 u16 vlan_flags = br_vlan_flags(range_start, pvid); 1811 1812 if (!br_vlan_fill_vids(skb, range_start->vid, 1813 range_end->vid, range_start, 1814 vlan_flags, dump_stats)) { 1815 err = -EMSGSIZE; 1816 break; 1817 } 1818 /* advance number of filled vlans */ 1819 idx += range_end->vid - range_start->vid + 1; 1820 1821 range_start = v; 1822 } 1823 range_end = v; 1824 } 1825 1826 /* err will be 0 and range_start will be set in 3 cases here: 1827 * - first vlan (range_start == range_end) 1828 * - last vlan (range_start == range_end, not in range) 1829 * - last vlan range (range_start != range_end, in range) 1830 */ 1831 if (!err && range_start && 1832 !br_vlan_fill_vids(skb, range_start->vid, range_end->vid, 1833 range_start, br_vlan_flags(range_start, pvid), 1834 dump_stats)) 1835 err = -EMSGSIZE; 1836 1837 cb->args[1] = err ? idx : 0; 1838 1839 nlmsg_end(skb, nlh); 1840 1841 return err; 1842 } 1843 1844 static const struct nla_policy br_vlan_db_dump_pol[BRIDGE_VLANDB_DUMP_MAX + 1] = { 1845 [BRIDGE_VLANDB_DUMP_FLAGS] = { .type = NLA_U32 }, 1846 }; 1847 1848 static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb) 1849 { 1850 struct nlattr *dtb[BRIDGE_VLANDB_DUMP_MAX + 1]; 1851 int idx = 0, err = 0, s_idx = cb->args[0]; 1852 struct net *net = sock_net(skb->sk); 1853 struct br_vlan_msg *bvm; 1854 struct net_device *dev; 1855 u32 dump_flags = 0; 1856 1857 err = nlmsg_parse(cb->nlh, sizeof(*bvm), dtb, BRIDGE_VLANDB_DUMP_MAX, 1858 br_vlan_db_dump_pol, cb->extack); 1859 if (err < 0) 1860 return err; 1861 1862 bvm = nlmsg_data(cb->nlh); 1863 if (dtb[BRIDGE_VLANDB_DUMP_FLAGS]) 1864 dump_flags = nla_get_u32(dtb[BRIDGE_VLANDB_DUMP_FLAGS]); 1865 1866 rcu_read_lock(); 1867 if (bvm->ifindex) { 1868 dev = dev_get_by_index_rcu(net, bvm->ifindex); 1869 if (!dev) { 1870 err = -ENODEV; 1871 goto out_err; 1872 } 1873 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 1874 if (err && err != -EMSGSIZE) 1875 goto out_err; 1876 } else { 1877 for_each_netdev_rcu(net, dev) { 1878 if (idx < s_idx) 1879 goto skip; 1880 1881 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 1882 if (err == -EMSGSIZE) 1883 break; 1884 skip: 1885 idx++; 1886 } 1887 } 1888 cb->args[0] = idx; 1889 rcu_read_unlock(); 1890 1891 return skb->len; 1892 1893 out_err: 1894 rcu_read_unlock(); 1895 1896 return err; 1897 } 1898 1899 static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = { 1900 [BRIDGE_VLANDB_ENTRY_INFO] = 1901 NLA_POLICY_EXACT_LEN(sizeof(struct bridge_vlan_info)), 1902 [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 }, 1903 [BRIDGE_VLANDB_ENTRY_STATE] = { .type = NLA_U8 }, 1904 [BRIDGE_VLANDB_ENTRY_TUNNEL_INFO] = { .type = NLA_NESTED }, 1905 }; 1906 1907 static int br_vlan_rtm_process_one(struct net_device *dev, 1908 const struct nlattr *attr, 1909 int cmd, struct netlink_ext_ack *extack) 1910 { 1911 struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL; 1912 struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1]; 1913 bool changed = false, skip_processing = false; 1914 struct net_bridge_vlan_group *vg; 1915 struct net_bridge_port *p = NULL; 1916 int err = 0, cmdmap = 0; 1917 struct net_bridge *br; 1918 1919 if (netif_is_bridge_master(dev)) { 1920 br = netdev_priv(dev); 1921 vg = br_vlan_group(br); 1922 } else { 1923 p = br_port_get_rtnl(dev); 1924 if (WARN_ON(!p)) 1925 return -ENODEV; 1926 br = p->br; 1927 vg = nbp_vlan_group(p); 1928 } 1929 1930 if (WARN_ON(!vg)) 1931 return -ENODEV; 1932 1933 err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr, 1934 br_vlan_db_policy, extack); 1935 if (err) 1936 return err; 1937 1938 if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) { 1939 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info"); 1940 return -EINVAL; 1941 } 1942 memset(&vrange_end, 0, sizeof(vrange_end)); 1943 1944 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]); 1945 if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 1946 BRIDGE_VLAN_INFO_RANGE_END)) { 1947 NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls"); 1948 return -EINVAL; 1949 } 1950 if (!br_vlan_valid_id(vinfo->vid, extack)) 1951 return -EINVAL; 1952 1953 if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) { 1954 vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]); 1955 /* validate user-provided flags without RANGE_BEGIN */ 1956 vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags; 1957 vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; 1958 1959 /* vinfo_last is the range start, vinfo the range end */ 1960 vinfo_last = vinfo; 1961 vinfo = &vrange_end; 1962 1963 if (!br_vlan_valid_id(vinfo->vid, extack) || 1964 !br_vlan_valid_range(vinfo, vinfo_last, extack)) 1965 return -EINVAL; 1966 } 1967 1968 switch (cmd) { 1969 case RTM_NEWVLAN: 1970 cmdmap = RTM_SETLINK; 1971 skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS); 1972 break; 1973 case RTM_DELVLAN: 1974 cmdmap = RTM_DELLINK; 1975 break; 1976 } 1977 1978 if (!skip_processing) { 1979 struct bridge_vlan_info *tmp_last = vinfo_last; 1980 1981 /* br_process_vlan_info may overwrite vinfo_last */ 1982 err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last, 1983 &changed, extack); 1984 1985 /* notify first if anything changed */ 1986 if (changed) 1987 br_ifinfo_notify(cmdmap, br, p); 1988 1989 if (err) 1990 return err; 1991 } 1992 1993 /* deal with options */ 1994 if (cmd == RTM_NEWVLAN) { 1995 struct net_bridge_vlan *range_start, *range_end; 1996 1997 if (vinfo_last) { 1998 range_start = br_vlan_find(vg, vinfo_last->vid); 1999 range_end = br_vlan_find(vg, vinfo->vid); 2000 } else { 2001 range_start = br_vlan_find(vg, vinfo->vid); 2002 range_end = range_start; 2003 } 2004 2005 err = br_vlan_process_options(br, p, range_start, range_end, 2006 tb, extack); 2007 } 2008 2009 return err; 2010 } 2011 2012 static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh, 2013 struct netlink_ext_ack *extack) 2014 { 2015 struct net *net = sock_net(skb->sk); 2016 struct br_vlan_msg *bvm; 2017 struct net_device *dev; 2018 struct nlattr *attr; 2019 int err, vlans = 0; 2020 int rem; 2021 2022 /* this should validate the header and check for remaining bytes */ 2023 err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL, 2024 extack); 2025 if (err < 0) 2026 return err; 2027 2028 bvm = nlmsg_data(nlh); 2029 dev = __dev_get_by_index(net, bvm->ifindex); 2030 if (!dev) 2031 return -ENODEV; 2032 2033 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) { 2034 NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port"); 2035 return -EINVAL; 2036 } 2037 2038 nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) { 2039 if (nla_type(attr) != BRIDGE_VLANDB_ENTRY) 2040 continue; 2041 2042 vlans++; 2043 err = br_vlan_rtm_process_one(dev, attr, nlh->nlmsg_type, 2044 extack); 2045 if (err) 2046 break; 2047 } 2048 if (!vlans) { 2049 NL_SET_ERR_MSG_MOD(extack, "No vlans found to process"); 2050 err = -EINVAL; 2051 } 2052 2053 return err; 2054 } 2055 2056 void br_vlan_rtnl_init(void) 2057 { 2058 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL, 2059 br_vlan_rtm_dump, 0); 2060 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN, 2061 br_vlan_rtm_process, NULL, 0); 2062 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN, 2063 br_vlan_rtm_process, NULL, 0); 2064 } 2065 2066 void br_vlan_rtnl_uninit(void) 2067 { 2068 rtnl_unregister(PF_BRIDGE, RTM_GETVLAN); 2069 rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN); 2070 rtnl_unregister(PF_BRIDGE, RTM_DELVLAN); 2071 } 2072