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 = 274 netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 275 if (!v->stats) { 276 err = -ENOMEM; 277 goto out_filt; 278 } 279 v->priv_flags |= BR_VLFLAG_PER_PORT_STATS; 280 } else { 281 v->stats = masterv->stats; 282 } 283 } else { 284 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack); 285 if (err && err != -EOPNOTSUPP) 286 goto out; 287 } 288 289 /* Add the dev mac and count the vlan only if it's usable */ 290 if (br_vlan_should_use(v)) { 291 err = br_fdb_insert(br, p, dev->dev_addr, v->vid); 292 if (err) { 293 br_err(br, "failed insert local address into bridge forwarding table\n"); 294 goto out_filt; 295 } 296 vg->num_vlans++; 297 } 298 299 /* set the state before publishing */ 300 v->state = BR_STATE_FORWARDING; 301 302 err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode, 303 br_vlan_rht_params); 304 if (err) 305 goto out_fdb_insert; 306 307 __vlan_add_list(v); 308 __vlan_add_flags(v, flags); 309 310 if (p) 311 nbp_vlan_set_vlan_dev_state(p, v->vid); 312 out: 313 return err; 314 315 out_fdb_insert: 316 if (br_vlan_should_use(v)) { 317 br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid); 318 vg->num_vlans--; 319 } 320 321 out_filt: 322 if (p) { 323 __vlan_vid_del(dev, br, v); 324 if (masterv) { 325 if (v->stats && masterv->stats != v->stats) 326 free_percpu(v->stats); 327 v->stats = NULL; 328 329 br_vlan_put_master(masterv); 330 v->brvlan = NULL; 331 } 332 } else { 333 br_switchdev_port_vlan_del(dev, v->vid); 334 } 335 336 goto out; 337 } 338 339 static int __vlan_del(struct net_bridge_vlan *v) 340 { 341 struct net_bridge_vlan *masterv = v; 342 struct net_bridge_vlan_group *vg; 343 struct net_bridge_port *p = NULL; 344 int err = 0; 345 346 if (br_vlan_is_master(v)) { 347 vg = br_vlan_group(v->br); 348 } else { 349 p = v->port; 350 vg = nbp_vlan_group(v->port); 351 masterv = v->brvlan; 352 } 353 354 __vlan_delete_pvid(vg, v->vid); 355 if (p) { 356 err = __vlan_vid_del(p->dev, p->br, v); 357 if (err) 358 goto out; 359 } else { 360 err = br_switchdev_port_vlan_del(v->br->dev, v->vid); 361 if (err && err != -EOPNOTSUPP) 362 goto out; 363 err = 0; 364 } 365 366 if (br_vlan_should_use(v)) { 367 v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY; 368 vg->num_vlans--; 369 } 370 371 if (masterv != v) { 372 vlan_tunnel_info_del(vg, v); 373 rhashtable_remove_fast(&vg->vlan_hash, &v->vnode, 374 br_vlan_rht_params); 375 __vlan_del_list(v); 376 nbp_vlan_set_vlan_dev_state(p, v->vid); 377 call_rcu(&v->rcu, nbp_vlan_rcu_free); 378 } 379 380 br_vlan_put_master(masterv); 381 out: 382 return err; 383 } 384 385 static void __vlan_group_free(struct net_bridge_vlan_group *vg) 386 { 387 WARN_ON(!list_empty(&vg->vlan_list)); 388 rhashtable_destroy(&vg->vlan_hash); 389 vlan_tunnel_deinit(vg); 390 kfree(vg); 391 } 392 393 static void __vlan_flush(const struct net_bridge *br, 394 const struct net_bridge_port *p, 395 struct net_bridge_vlan_group *vg) 396 { 397 struct net_bridge_vlan *vlan, *tmp; 398 u16 v_start = 0, v_end = 0; 399 400 __vlan_delete_pvid(vg, vg->pvid); 401 list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) { 402 /* take care of disjoint ranges */ 403 if (!v_start) { 404 v_start = vlan->vid; 405 } else if (vlan->vid - v_end != 1) { 406 /* found range end, notify and start next one */ 407 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN); 408 v_start = vlan->vid; 409 } 410 v_end = vlan->vid; 411 412 __vlan_del(vlan); 413 } 414 415 /* notify about the last/whole vlan range */ 416 if (v_start) 417 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN); 418 } 419 420 struct sk_buff *br_handle_vlan(struct net_bridge *br, 421 const struct net_bridge_port *p, 422 struct net_bridge_vlan_group *vg, 423 struct sk_buff *skb) 424 { 425 struct pcpu_sw_netstats *stats; 426 struct net_bridge_vlan *v; 427 u16 vid; 428 429 /* If this packet was not filtered at input, let it pass */ 430 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 431 goto out; 432 433 /* At this point, we know that the frame was filtered and contains 434 * a valid vlan id. If the vlan id has untagged flag set, 435 * send untagged; otherwise, send tagged. 436 */ 437 br_vlan_get_tag(skb, &vid); 438 v = br_vlan_find(vg, vid); 439 /* Vlan entry must be configured at this point. The 440 * only exception is the bridge is set in promisc mode and the 441 * packet is destined for the bridge device. In this case 442 * pass the packet as is. 443 */ 444 if (!v || !br_vlan_should_use(v)) { 445 if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) { 446 goto out; 447 } else { 448 kfree_skb(skb); 449 return NULL; 450 } 451 } 452 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 453 stats = this_cpu_ptr(v->stats); 454 u64_stats_update_begin(&stats->syncp); 455 stats->tx_bytes += skb->len; 456 stats->tx_packets++; 457 u64_stats_update_end(&stats->syncp); 458 } 459 460 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 461 __vlan_hwaccel_clear_tag(skb); 462 463 if (p && (p->flags & BR_VLAN_TUNNEL) && 464 br_handle_egress_vlan_tunnel(skb, v)) { 465 kfree_skb(skb); 466 return NULL; 467 } 468 out: 469 return skb; 470 } 471 472 /* Called under RCU */ 473 static bool __allowed_ingress(const struct net_bridge *br, 474 struct net_bridge_vlan_group *vg, 475 struct sk_buff *skb, u16 *vid, 476 u8 *state) 477 { 478 struct pcpu_sw_netstats *stats; 479 struct net_bridge_vlan *v; 480 bool tagged; 481 482 BR_INPUT_SKB_CB(skb)->vlan_filtered = true; 483 /* If vlan tx offload is disabled on bridge device and frame was 484 * sent from vlan device on the bridge device, it does not have 485 * HW accelerated vlan tag. 486 */ 487 if (unlikely(!skb_vlan_tag_present(skb) && 488 skb->protocol == br->vlan_proto)) { 489 skb = skb_vlan_untag(skb); 490 if (unlikely(!skb)) 491 return false; 492 } 493 494 if (!br_vlan_get_tag(skb, vid)) { 495 /* Tagged frame */ 496 if (skb->vlan_proto != br->vlan_proto) { 497 /* Protocol-mismatch, empty out vlan_tci for new tag */ 498 skb_push(skb, ETH_HLEN); 499 skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, 500 skb_vlan_tag_get(skb)); 501 if (unlikely(!skb)) 502 return false; 503 504 skb_pull(skb, ETH_HLEN); 505 skb_reset_mac_len(skb); 506 *vid = 0; 507 tagged = false; 508 } else { 509 tagged = true; 510 } 511 } else { 512 /* Untagged frame */ 513 tagged = false; 514 } 515 516 if (!*vid) { 517 u16 pvid = br_get_pvid(vg); 518 519 /* Frame had a tag with VID 0 or did not have a tag. 520 * See if pvid is set on this port. That tells us which 521 * vlan untagged or priority-tagged traffic belongs to. 522 */ 523 if (!pvid) 524 goto drop; 525 526 /* PVID is set on this port. Any untagged or priority-tagged 527 * ingress frame is considered to belong to this vlan. 528 */ 529 *vid = pvid; 530 if (likely(!tagged)) 531 /* Untagged Frame. */ 532 __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid); 533 else 534 /* Priority-tagged Frame. 535 * At this point, we know that skb->vlan_tci VID 536 * field was 0. 537 * We update only VID field and preserve PCP field. 538 */ 539 skb->vlan_tci |= pvid; 540 541 /* if stats are disabled we can avoid the lookup */ 542 if (!br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 543 if (*state == BR_STATE_FORWARDING) { 544 *state = br_vlan_get_pvid_state(vg); 545 return br_vlan_state_allowed(*state, true); 546 } else { 547 return true; 548 } 549 } 550 } 551 v = br_vlan_find(vg, *vid); 552 if (!v || !br_vlan_should_use(v)) 553 goto drop; 554 555 if (*state == BR_STATE_FORWARDING) { 556 *state = br_vlan_get_state(v); 557 if (!br_vlan_state_allowed(*state, true)) 558 goto drop; 559 } 560 561 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 562 stats = this_cpu_ptr(v->stats); 563 u64_stats_update_begin(&stats->syncp); 564 stats->rx_bytes += skb->len; 565 stats->rx_packets++; 566 u64_stats_update_end(&stats->syncp); 567 } 568 569 return true; 570 571 drop: 572 kfree_skb(skb); 573 return false; 574 } 575 576 bool br_allowed_ingress(const struct net_bridge *br, 577 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 578 u16 *vid, u8 *state) 579 { 580 /* If VLAN filtering is disabled on the bridge, all packets are 581 * permitted. 582 */ 583 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) { 584 BR_INPUT_SKB_CB(skb)->vlan_filtered = false; 585 return true; 586 } 587 588 return __allowed_ingress(br, vg, skb, vid, state); 589 } 590 591 /* Called under RCU. */ 592 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 593 const struct sk_buff *skb) 594 { 595 const struct net_bridge_vlan *v; 596 u16 vid; 597 598 /* If this packet was not filtered at input, let it pass */ 599 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 600 return true; 601 602 br_vlan_get_tag(skb, &vid); 603 v = br_vlan_find(vg, vid); 604 if (v && br_vlan_should_use(v) && 605 br_vlan_state_allowed(br_vlan_get_state(v), false)) 606 return true; 607 608 return false; 609 } 610 611 /* Called under RCU */ 612 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid) 613 { 614 struct net_bridge_vlan_group *vg; 615 struct net_bridge *br = p->br; 616 struct net_bridge_vlan *v; 617 618 /* If filtering was disabled at input, let it pass. */ 619 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 620 return true; 621 622 vg = nbp_vlan_group_rcu(p); 623 if (!vg || !vg->num_vlans) 624 return false; 625 626 if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto) 627 *vid = 0; 628 629 if (!*vid) { 630 *vid = br_get_pvid(vg); 631 if (!*vid || 632 !br_vlan_state_allowed(br_vlan_get_pvid_state(vg), true)) 633 return false; 634 635 return true; 636 } 637 638 v = br_vlan_find(vg, *vid); 639 if (v && br_vlan_state_allowed(br_vlan_get_state(v), true)) 640 return true; 641 642 return false; 643 } 644 645 static int br_vlan_add_existing(struct net_bridge *br, 646 struct net_bridge_vlan_group *vg, 647 struct net_bridge_vlan *vlan, 648 u16 flags, bool *changed, 649 struct netlink_ext_ack *extack) 650 { 651 int err; 652 653 err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack); 654 if (err && err != -EOPNOTSUPP) 655 return err; 656 657 if (!br_vlan_is_brentry(vlan)) { 658 /* Trying to change flags of non-existent bridge vlan */ 659 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) { 660 err = -EINVAL; 661 goto err_flags; 662 } 663 /* It was only kept for port vlans, now make it real */ 664 err = br_fdb_insert(br, NULL, br->dev->dev_addr, 665 vlan->vid); 666 if (err) { 667 br_err(br, "failed to insert local address into bridge forwarding table\n"); 668 goto err_fdb_insert; 669 } 670 671 refcount_inc(&vlan->refcnt); 672 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY; 673 vg->num_vlans++; 674 *changed = true; 675 } 676 677 if (__vlan_add_flags(vlan, flags)) 678 *changed = true; 679 680 return 0; 681 682 err_fdb_insert: 683 err_flags: 684 br_switchdev_port_vlan_del(br->dev, vlan->vid); 685 return err; 686 } 687 688 /* Must be protected by RTNL. 689 * Must be called with vid in range from 1 to 4094 inclusive. 690 * changed must be true only if the vlan was created or updated 691 */ 692 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed, 693 struct netlink_ext_ack *extack) 694 { 695 struct net_bridge_vlan_group *vg; 696 struct net_bridge_vlan *vlan; 697 int ret; 698 699 ASSERT_RTNL(); 700 701 *changed = false; 702 vg = br_vlan_group(br); 703 vlan = br_vlan_find(vg, vid); 704 if (vlan) 705 return br_vlan_add_existing(br, vg, vlan, flags, changed, 706 extack); 707 708 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 709 if (!vlan) 710 return -ENOMEM; 711 712 vlan->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 713 if (!vlan->stats) { 714 kfree(vlan); 715 return -ENOMEM; 716 } 717 vlan->vid = vid; 718 vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER; 719 vlan->flags &= ~BRIDGE_VLAN_INFO_PVID; 720 vlan->br = br; 721 if (flags & BRIDGE_VLAN_INFO_BRENTRY) 722 refcount_set(&vlan->refcnt, 1); 723 ret = __vlan_add(vlan, flags, extack); 724 if (ret) { 725 free_percpu(vlan->stats); 726 kfree(vlan); 727 } else { 728 *changed = true; 729 } 730 731 return ret; 732 } 733 734 /* Must be protected by RTNL. 735 * Must be called with vid in range from 1 to 4094 inclusive. 736 */ 737 int br_vlan_delete(struct net_bridge *br, u16 vid) 738 { 739 struct net_bridge_vlan_group *vg; 740 struct net_bridge_vlan *v; 741 742 ASSERT_RTNL(); 743 744 vg = br_vlan_group(br); 745 v = br_vlan_find(vg, vid); 746 if (!v || !br_vlan_is_brentry(v)) 747 return -ENOENT; 748 749 br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid); 750 br_fdb_delete_by_port(br, NULL, vid, 0); 751 752 vlan_tunnel_info_del(vg, v); 753 754 return __vlan_del(v); 755 } 756 757 void br_vlan_flush(struct net_bridge *br) 758 { 759 struct net_bridge_vlan_group *vg; 760 761 ASSERT_RTNL(); 762 763 vg = br_vlan_group(br); 764 __vlan_flush(br, NULL, vg); 765 RCU_INIT_POINTER(br->vlgrp, NULL); 766 synchronize_rcu(); 767 __vlan_group_free(vg); 768 } 769 770 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid) 771 { 772 if (!vg) 773 return NULL; 774 775 return br_vlan_lookup(&vg->vlan_hash, vid); 776 } 777 778 /* Must be protected by RTNL. */ 779 static void recalculate_group_addr(struct net_bridge *br) 780 { 781 if (br_opt_get(br, BROPT_GROUP_ADDR_SET)) 782 return; 783 784 spin_lock_bh(&br->lock); 785 if (!br_opt_get(br, BROPT_VLAN_ENABLED) || 786 br->vlan_proto == htons(ETH_P_8021Q)) { 787 /* Bridge Group Address */ 788 br->group_addr[5] = 0x00; 789 } else { /* vlan_enabled && ETH_P_8021AD */ 790 /* Provider Bridge Group Address */ 791 br->group_addr[5] = 0x08; 792 } 793 spin_unlock_bh(&br->lock); 794 } 795 796 /* Must be protected by RTNL. */ 797 void br_recalculate_fwd_mask(struct net_bridge *br) 798 { 799 if (!br_opt_get(br, BROPT_VLAN_ENABLED) || 800 br->vlan_proto == htons(ETH_P_8021Q)) 801 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT; 802 else /* vlan_enabled && ETH_P_8021AD */ 803 br->group_fwd_mask_required = BR_GROUPFWD_8021AD & 804 ~(1u << br->group_addr[5]); 805 } 806 807 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) 808 { 809 struct switchdev_attr attr = { 810 .orig_dev = br->dev, 811 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 812 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 813 .u.vlan_filtering = val, 814 }; 815 int err; 816 817 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val) 818 return 0; 819 820 err = switchdev_port_attr_set(br->dev, &attr); 821 if (err && err != -EOPNOTSUPP) 822 return err; 823 824 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val); 825 br_manage_promisc(br); 826 recalculate_group_addr(br); 827 br_recalculate_fwd_mask(br); 828 829 return 0; 830 } 831 832 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) 833 { 834 return __br_vlan_filter_toggle(br, val); 835 } 836 837 bool br_vlan_enabled(const struct net_device *dev) 838 { 839 struct net_bridge *br = netdev_priv(dev); 840 841 return br_opt_get(br, BROPT_VLAN_ENABLED); 842 } 843 EXPORT_SYMBOL_GPL(br_vlan_enabled); 844 845 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto) 846 { 847 struct net_bridge *br = netdev_priv(dev); 848 849 *p_proto = ntohs(br->vlan_proto); 850 851 return 0; 852 } 853 EXPORT_SYMBOL_GPL(br_vlan_get_proto); 854 855 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto) 856 { 857 struct switchdev_attr attr = { 858 .orig_dev = br->dev, 859 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL, 860 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 861 .u.vlan_protocol = ntohs(proto), 862 }; 863 int err = 0; 864 struct net_bridge_port *p; 865 struct net_bridge_vlan *vlan; 866 struct net_bridge_vlan_group *vg; 867 __be16 oldproto = br->vlan_proto; 868 869 if (br->vlan_proto == proto) 870 return 0; 871 872 err = switchdev_port_attr_set(br->dev, &attr); 873 if (err && err != -EOPNOTSUPP) 874 return err; 875 876 /* Add VLANs for the new proto to the device filter. */ 877 list_for_each_entry(p, &br->port_list, list) { 878 vg = nbp_vlan_group(p); 879 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 880 err = vlan_vid_add(p->dev, proto, vlan->vid); 881 if (err) 882 goto err_filt; 883 } 884 } 885 886 br->vlan_proto = proto; 887 888 recalculate_group_addr(br); 889 br_recalculate_fwd_mask(br); 890 891 /* Delete VLANs for the old proto from the device filter. */ 892 list_for_each_entry(p, &br->port_list, list) { 893 vg = nbp_vlan_group(p); 894 list_for_each_entry(vlan, &vg->vlan_list, vlist) 895 vlan_vid_del(p->dev, oldproto, vlan->vid); 896 } 897 898 return 0; 899 900 err_filt: 901 attr.u.vlan_protocol = ntohs(oldproto); 902 switchdev_port_attr_set(br->dev, &attr); 903 904 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist) 905 vlan_vid_del(p->dev, proto, vlan->vid); 906 907 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 908 vg = nbp_vlan_group(p); 909 list_for_each_entry(vlan, &vg->vlan_list, vlist) 910 vlan_vid_del(p->dev, proto, vlan->vid); 911 } 912 913 return err; 914 } 915 916 int br_vlan_set_proto(struct net_bridge *br, unsigned long val) 917 { 918 if (val != ETH_P_8021Q && val != ETH_P_8021AD) 919 return -EPROTONOSUPPORT; 920 921 return __br_vlan_set_proto(br, htons(val)); 922 } 923 924 int br_vlan_set_stats(struct net_bridge *br, unsigned long val) 925 { 926 switch (val) { 927 case 0: 928 case 1: 929 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val); 930 break; 931 default: 932 return -EINVAL; 933 } 934 935 return 0; 936 } 937 938 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val) 939 { 940 struct net_bridge_port *p; 941 942 /* allow to change the option if there are no port vlans configured */ 943 list_for_each_entry(p, &br->port_list, list) { 944 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 945 946 if (vg->num_vlans) 947 return -EBUSY; 948 } 949 950 switch (val) { 951 case 0: 952 case 1: 953 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val); 954 break; 955 default: 956 return -EINVAL; 957 } 958 959 return 0; 960 } 961 962 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid) 963 { 964 struct net_bridge_vlan *v; 965 966 if (vid != vg->pvid) 967 return false; 968 969 v = br_vlan_lookup(&vg->vlan_hash, vid); 970 if (v && br_vlan_should_use(v) && 971 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 972 return true; 973 974 return false; 975 } 976 977 static void br_vlan_disable_default_pvid(struct net_bridge *br) 978 { 979 struct net_bridge_port *p; 980 u16 pvid = br->default_pvid; 981 982 /* Disable default_pvid on all ports where it is still 983 * configured. 984 */ 985 if (vlan_default_pvid(br_vlan_group(br), pvid)) { 986 if (!br_vlan_delete(br, pvid)) 987 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); 988 } 989 990 list_for_each_entry(p, &br->port_list, list) { 991 if (vlan_default_pvid(nbp_vlan_group(p), pvid) && 992 !nbp_vlan_delete(p, pvid)) 993 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); 994 } 995 996 br->default_pvid = 0; 997 } 998 999 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1000 struct netlink_ext_ack *extack) 1001 { 1002 const struct net_bridge_vlan *pvent; 1003 struct net_bridge_vlan_group *vg; 1004 struct net_bridge_port *p; 1005 unsigned long *changed; 1006 bool vlchange; 1007 u16 old_pvid; 1008 int err = 0; 1009 1010 if (!pvid) { 1011 br_vlan_disable_default_pvid(br); 1012 return 0; 1013 } 1014 1015 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL); 1016 if (!changed) 1017 return -ENOMEM; 1018 1019 old_pvid = br->default_pvid; 1020 1021 /* Update default_pvid config only if we do not conflict with 1022 * user configuration. 1023 */ 1024 vg = br_vlan_group(br); 1025 pvent = br_vlan_find(vg, pvid); 1026 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) && 1027 (!pvent || !br_vlan_should_use(pvent))) { 1028 err = br_vlan_add(br, pvid, 1029 BRIDGE_VLAN_INFO_PVID | 1030 BRIDGE_VLAN_INFO_UNTAGGED | 1031 BRIDGE_VLAN_INFO_BRENTRY, 1032 &vlchange, extack); 1033 if (err) 1034 goto out; 1035 1036 if (br_vlan_delete(br, old_pvid)) 1037 br_vlan_notify(br, NULL, old_pvid, 0, RTM_DELVLAN); 1038 br_vlan_notify(br, NULL, pvid, 0, RTM_NEWVLAN); 1039 set_bit(0, changed); 1040 } 1041 1042 list_for_each_entry(p, &br->port_list, list) { 1043 /* Update default_pvid config only if we do not conflict with 1044 * user configuration. 1045 */ 1046 vg = nbp_vlan_group(p); 1047 if ((old_pvid && 1048 !vlan_default_pvid(vg, old_pvid)) || 1049 br_vlan_find(vg, pvid)) 1050 continue; 1051 1052 err = nbp_vlan_add(p, pvid, 1053 BRIDGE_VLAN_INFO_PVID | 1054 BRIDGE_VLAN_INFO_UNTAGGED, 1055 &vlchange, extack); 1056 if (err) 1057 goto err_port; 1058 if (nbp_vlan_delete(p, old_pvid)) 1059 br_vlan_notify(br, p, old_pvid, 0, RTM_DELVLAN); 1060 br_vlan_notify(p->br, p, pvid, 0, RTM_NEWVLAN); 1061 set_bit(p->port_no, changed); 1062 } 1063 1064 br->default_pvid = pvid; 1065 1066 out: 1067 bitmap_free(changed); 1068 return err; 1069 1070 err_port: 1071 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 1072 if (!test_bit(p->port_no, changed)) 1073 continue; 1074 1075 if (old_pvid) { 1076 nbp_vlan_add(p, old_pvid, 1077 BRIDGE_VLAN_INFO_PVID | 1078 BRIDGE_VLAN_INFO_UNTAGGED, 1079 &vlchange, NULL); 1080 br_vlan_notify(p->br, p, old_pvid, 0, RTM_NEWVLAN); 1081 } 1082 nbp_vlan_delete(p, pvid); 1083 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); 1084 } 1085 1086 if (test_bit(0, changed)) { 1087 if (old_pvid) { 1088 br_vlan_add(br, old_pvid, 1089 BRIDGE_VLAN_INFO_PVID | 1090 BRIDGE_VLAN_INFO_UNTAGGED | 1091 BRIDGE_VLAN_INFO_BRENTRY, 1092 &vlchange, NULL); 1093 br_vlan_notify(br, NULL, old_pvid, 0, RTM_NEWVLAN); 1094 } 1095 br_vlan_delete(br, pvid); 1096 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); 1097 } 1098 goto out; 1099 } 1100 1101 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val) 1102 { 1103 u16 pvid = val; 1104 int err = 0; 1105 1106 if (val >= VLAN_VID_MASK) 1107 return -EINVAL; 1108 1109 if (pvid == br->default_pvid) 1110 goto out; 1111 1112 /* Only allow default pvid change when filtering is disabled */ 1113 if (br_opt_get(br, BROPT_VLAN_ENABLED)) { 1114 pr_info_once("Please disable vlan filtering to change default_pvid\n"); 1115 err = -EPERM; 1116 goto out; 1117 } 1118 err = __br_vlan_set_default_pvid(br, pvid, NULL); 1119 out: 1120 return err; 1121 } 1122 1123 int br_vlan_init(struct net_bridge *br) 1124 { 1125 struct net_bridge_vlan_group *vg; 1126 int ret = -ENOMEM; 1127 1128 vg = kzalloc(sizeof(*vg), GFP_KERNEL); 1129 if (!vg) 1130 goto out; 1131 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1132 if (ret) 1133 goto err_rhtbl; 1134 ret = vlan_tunnel_init(vg); 1135 if (ret) 1136 goto err_tunnel_init; 1137 INIT_LIST_HEAD(&vg->vlan_list); 1138 br->vlan_proto = htons(ETH_P_8021Q); 1139 br->default_pvid = 1; 1140 rcu_assign_pointer(br->vlgrp, vg); 1141 1142 out: 1143 return ret; 1144 1145 err_tunnel_init: 1146 rhashtable_destroy(&vg->vlan_hash); 1147 err_rhtbl: 1148 kfree(vg); 1149 1150 goto out; 1151 } 1152 1153 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack) 1154 { 1155 struct switchdev_attr attr = { 1156 .orig_dev = p->br->dev, 1157 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 1158 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 1159 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED), 1160 }; 1161 struct net_bridge_vlan_group *vg; 1162 int ret = -ENOMEM; 1163 1164 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); 1165 if (!vg) 1166 goto out; 1167 1168 ret = switchdev_port_attr_set(p->dev, &attr); 1169 if (ret && ret != -EOPNOTSUPP) 1170 goto err_vlan_enabled; 1171 1172 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1173 if (ret) 1174 goto err_rhtbl; 1175 ret = vlan_tunnel_init(vg); 1176 if (ret) 1177 goto err_tunnel_init; 1178 INIT_LIST_HEAD(&vg->vlan_list); 1179 rcu_assign_pointer(p->vlgrp, vg); 1180 if (p->br->default_pvid) { 1181 bool changed; 1182 1183 ret = nbp_vlan_add(p, p->br->default_pvid, 1184 BRIDGE_VLAN_INFO_PVID | 1185 BRIDGE_VLAN_INFO_UNTAGGED, 1186 &changed, extack); 1187 if (ret) 1188 goto err_vlan_add; 1189 br_vlan_notify(p->br, p, p->br->default_pvid, 0, RTM_NEWVLAN); 1190 } 1191 out: 1192 return ret; 1193 1194 err_vlan_add: 1195 RCU_INIT_POINTER(p->vlgrp, NULL); 1196 synchronize_rcu(); 1197 vlan_tunnel_deinit(vg); 1198 err_tunnel_init: 1199 rhashtable_destroy(&vg->vlan_hash); 1200 err_rhtbl: 1201 err_vlan_enabled: 1202 kfree(vg); 1203 1204 goto out; 1205 } 1206 1207 /* Must be protected by RTNL. 1208 * Must be called with vid in range from 1 to 4094 inclusive. 1209 * changed must be true only if the vlan was created or updated 1210 */ 1211 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1212 bool *changed, struct netlink_ext_ack *extack) 1213 { 1214 struct net_bridge_vlan *vlan; 1215 int ret; 1216 1217 ASSERT_RTNL(); 1218 1219 *changed = false; 1220 vlan = br_vlan_find(nbp_vlan_group(port), vid); 1221 if (vlan) { 1222 /* Pass the flags to the hardware bridge */ 1223 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack); 1224 if (ret && ret != -EOPNOTSUPP) 1225 return ret; 1226 *changed = __vlan_add_flags(vlan, flags); 1227 1228 return 0; 1229 } 1230 1231 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 1232 if (!vlan) 1233 return -ENOMEM; 1234 1235 vlan->vid = vid; 1236 vlan->port = port; 1237 ret = __vlan_add(vlan, flags, extack); 1238 if (ret) 1239 kfree(vlan); 1240 else 1241 *changed = true; 1242 1243 return ret; 1244 } 1245 1246 /* Must be protected by RTNL. 1247 * Must be called with vid in range from 1 to 4094 inclusive. 1248 */ 1249 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1250 { 1251 struct net_bridge_vlan *v; 1252 1253 ASSERT_RTNL(); 1254 1255 v = br_vlan_find(nbp_vlan_group(port), vid); 1256 if (!v) 1257 return -ENOENT; 1258 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); 1259 br_fdb_delete_by_port(port->br, port, vid, 0); 1260 1261 return __vlan_del(v); 1262 } 1263 1264 void nbp_vlan_flush(struct net_bridge_port *port) 1265 { 1266 struct net_bridge_vlan_group *vg; 1267 1268 ASSERT_RTNL(); 1269 1270 vg = nbp_vlan_group(port); 1271 __vlan_flush(port->br, port, vg); 1272 RCU_INIT_POINTER(port->vlgrp, NULL); 1273 synchronize_rcu(); 1274 __vlan_group_free(vg); 1275 } 1276 1277 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1278 struct pcpu_sw_netstats *stats) 1279 { 1280 int i; 1281 1282 memset(stats, 0, sizeof(*stats)); 1283 for_each_possible_cpu(i) { 1284 u64 rxpackets, rxbytes, txpackets, txbytes; 1285 struct pcpu_sw_netstats *cpu_stats; 1286 unsigned int start; 1287 1288 cpu_stats = per_cpu_ptr(v->stats, i); 1289 do { 1290 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 1291 rxpackets = cpu_stats->rx_packets; 1292 rxbytes = cpu_stats->rx_bytes; 1293 txbytes = cpu_stats->tx_bytes; 1294 txpackets = cpu_stats->tx_packets; 1295 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 1296 1297 stats->rx_packets += rxpackets; 1298 stats->rx_bytes += rxbytes; 1299 stats->tx_bytes += txbytes; 1300 stats->tx_packets += txpackets; 1301 } 1302 } 1303 1304 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 1305 { 1306 struct net_bridge_vlan_group *vg; 1307 struct net_bridge_port *p; 1308 1309 ASSERT_RTNL(); 1310 p = br_port_get_check_rtnl(dev); 1311 if (p) 1312 vg = nbp_vlan_group(p); 1313 else if (netif_is_bridge_master(dev)) 1314 vg = br_vlan_group(netdev_priv(dev)); 1315 else 1316 return -EINVAL; 1317 1318 *p_pvid = br_get_pvid(vg); 1319 return 0; 1320 } 1321 EXPORT_SYMBOL_GPL(br_vlan_get_pvid); 1322 1323 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) 1324 { 1325 struct net_bridge_vlan_group *vg; 1326 struct net_bridge_port *p; 1327 1328 p = br_port_get_check_rcu(dev); 1329 if (p) 1330 vg = nbp_vlan_group_rcu(p); 1331 else if (netif_is_bridge_master(dev)) 1332 vg = br_vlan_group_rcu(netdev_priv(dev)); 1333 else 1334 return -EINVAL; 1335 1336 *p_pvid = br_get_pvid(vg); 1337 return 0; 1338 } 1339 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu); 1340 1341 int br_vlan_get_info(const struct net_device *dev, u16 vid, 1342 struct bridge_vlan_info *p_vinfo) 1343 { 1344 struct net_bridge_vlan_group *vg; 1345 struct net_bridge_vlan *v; 1346 struct net_bridge_port *p; 1347 1348 ASSERT_RTNL(); 1349 p = br_port_get_check_rtnl(dev); 1350 if (p) 1351 vg = nbp_vlan_group(p); 1352 else if (netif_is_bridge_master(dev)) 1353 vg = br_vlan_group(netdev_priv(dev)); 1354 else 1355 return -EINVAL; 1356 1357 v = br_vlan_find(vg, vid); 1358 if (!v) 1359 return -ENOENT; 1360 1361 p_vinfo->vid = vid; 1362 p_vinfo->flags = v->flags; 1363 if (vid == br_get_pvid(vg)) 1364 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID; 1365 return 0; 1366 } 1367 EXPORT_SYMBOL_GPL(br_vlan_get_info); 1368 1369 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev) 1370 { 1371 return is_vlan_dev(dev) && 1372 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING); 1373 } 1374 1375 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev, 1376 __always_unused struct netdev_nested_priv *priv) 1377 { 1378 return br_vlan_is_bind_vlan_dev(dev); 1379 } 1380 1381 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev) 1382 { 1383 int found; 1384 1385 rcu_read_lock(); 1386 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn, 1387 NULL); 1388 rcu_read_unlock(); 1389 1390 return !!found; 1391 } 1392 1393 struct br_vlan_bind_walk_data { 1394 u16 vid; 1395 struct net_device *result; 1396 }; 1397 1398 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev, 1399 struct netdev_nested_priv *priv) 1400 { 1401 struct br_vlan_bind_walk_data *data = priv->data; 1402 int found = 0; 1403 1404 if (br_vlan_is_bind_vlan_dev(dev) && 1405 vlan_dev_priv(dev)->vlan_id == data->vid) { 1406 data->result = dev; 1407 found = 1; 1408 } 1409 1410 return found; 1411 } 1412 1413 static struct net_device * 1414 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid) 1415 { 1416 struct br_vlan_bind_walk_data data = { 1417 .vid = vid, 1418 }; 1419 struct netdev_nested_priv priv = { 1420 .data = (void *)&data, 1421 }; 1422 1423 rcu_read_lock(); 1424 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn, 1425 &priv); 1426 rcu_read_unlock(); 1427 1428 return data.result; 1429 } 1430 1431 static bool br_vlan_is_dev_up(const struct net_device *dev) 1432 { 1433 return !!(dev->flags & IFF_UP) && netif_oper_up(dev); 1434 } 1435 1436 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br, 1437 struct net_device *vlan_dev) 1438 { 1439 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id; 1440 struct net_bridge_vlan_group *vg; 1441 struct net_bridge_port *p; 1442 bool has_carrier = false; 1443 1444 if (!netif_carrier_ok(br->dev)) { 1445 netif_carrier_off(vlan_dev); 1446 return; 1447 } 1448 1449 list_for_each_entry(p, &br->port_list, list) { 1450 vg = nbp_vlan_group(p); 1451 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) { 1452 has_carrier = true; 1453 break; 1454 } 1455 } 1456 1457 if (has_carrier) 1458 netif_carrier_on(vlan_dev); 1459 else 1460 netif_carrier_off(vlan_dev); 1461 } 1462 1463 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p) 1464 { 1465 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 1466 struct net_bridge_vlan *vlan; 1467 struct net_device *vlan_dev; 1468 1469 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 1470 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, 1471 vlan->vid); 1472 if (vlan_dev) { 1473 if (br_vlan_is_dev_up(p->dev)) { 1474 if (netif_carrier_ok(p->br->dev)) 1475 netif_carrier_on(vlan_dev); 1476 } else { 1477 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1478 } 1479 } 1480 } 1481 } 1482 1483 static void br_vlan_upper_change(struct net_device *dev, 1484 struct net_device *upper_dev, 1485 bool linking) 1486 { 1487 struct net_bridge *br = netdev_priv(dev); 1488 1489 if (!br_vlan_is_bind_vlan_dev(upper_dev)) 1490 return; 1491 1492 if (linking) { 1493 br_vlan_set_vlan_dev_state(br, upper_dev); 1494 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true); 1495 } else { 1496 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, 1497 br_vlan_has_upper_bind_vlan_dev(dev)); 1498 } 1499 } 1500 1501 struct br_vlan_link_state_walk_data { 1502 struct net_bridge *br; 1503 }; 1504 1505 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev, 1506 struct netdev_nested_priv *priv) 1507 { 1508 struct br_vlan_link_state_walk_data *data = priv->data; 1509 1510 if (br_vlan_is_bind_vlan_dev(vlan_dev)) 1511 br_vlan_set_vlan_dev_state(data->br, vlan_dev); 1512 1513 return 0; 1514 } 1515 1516 static void br_vlan_link_state_change(struct net_device *dev, 1517 struct net_bridge *br) 1518 { 1519 struct br_vlan_link_state_walk_data data = { 1520 .br = br 1521 }; 1522 struct netdev_nested_priv priv = { 1523 .data = (void *)&data, 1524 }; 1525 1526 rcu_read_lock(); 1527 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn, 1528 &priv); 1529 rcu_read_unlock(); 1530 } 1531 1532 /* Must be protected by RTNL. */ 1533 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid) 1534 { 1535 struct net_device *vlan_dev; 1536 1537 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1538 return; 1539 1540 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid); 1541 if (vlan_dev) 1542 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1543 } 1544 1545 /* Must be protected by RTNL. */ 1546 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr) 1547 { 1548 struct netdev_notifier_changeupper_info *info; 1549 struct net_bridge *br = netdev_priv(dev); 1550 int vlcmd = 0, ret = 0; 1551 bool changed = false; 1552 1553 switch (event) { 1554 case NETDEV_REGISTER: 1555 ret = br_vlan_add(br, br->default_pvid, 1556 BRIDGE_VLAN_INFO_PVID | 1557 BRIDGE_VLAN_INFO_UNTAGGED | 1558 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL); 1559 vlcmd = RTM_NEWVLAN; 1560 break; 1561 case NETDEV_UNREGISTER: 1562 changed = !br_vlan_delete(br, br->default_pvid); 1563 vlcmd = RTM_DELVLAN; 1564 break; 1565 case NETDEV_CHANGEUPPER: 1566 info = ptr; 1567 br_vlan_upper_change(dev, info->upper_dev, info->linking); 1568 break; 1569 1570 case NETDEV_CHANGE: 1571 case NETDEV_UP: 1572 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING)) 1573 break; 1574 br_vlan_link_state_change(dev, br); 1575 break; 1576 } 1577 if (changed) 1578 br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd); 1579 1580 return ret; 1581 } 1582 1583 /* Must be protected by RTNL. */ 1584 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event) 1585 { 1586 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1587 return; 1588 1589 switch (event) { 1590 case NETDEV_CHANGE: 1591 case NETDEV_DOWN: 1592 case NETDEV_UP: 1593 br_vlan_set_all_vlan_dev_state(p); 1594 break; 1595 } 1596 } 1597 1598 static bool br_vlan_stats_fill(struct sk_buff *skb, 1599 const struct net_bridge_vlan *v) 1600 { 1601 struct pcpu_sw_netstats stats; 1602 struct nlattr *nest; 1603 1604 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_STATS); 1605 if (!nest) 1606 return false; 1607 1608 br_vlan_get_stats(v, &stats); 1609 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES, stats.rx_bytes, 1610 BRIDGE_VLANDB_STATS_PAD) || 1611 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_PACKETS, 1612 stats.rx_packets, BRIDGE_VLANDB_STATS_PAD) || 1613 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES, stats.tx_bytes, 1614 BRIDGE_VLANDB_STATS_PAD) || 1615 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_PACKETS, 1616 stats.tx_packets, BRIDGE_VLANDB_STATS_PAD)) 1617 goto out_err; 1618 1619 nla_nest_end(skb, nest); 1620 1621 return true; 1622 1623 out_err: 1624 nla_nest_cancel(skb, nest); 1625 return false; 1626 } 1627 1628 /* v_opts is used to dump the options which must be equal in the whole range */ 1629 static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range, 1630 const struct net_bridge_vlan *v_opts, 1631 u16 flags, 1632 bool dump_stats) 1633 { 1634 struct bridge_vlan_info info; 1635 struct nlattr *nest; 1636 1637 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY); 1638 if (!nest) 1639 return false; 1640 1641 memset(&info, 0, sizeof(info)); 1642 info.vid = vid; 1643 if (flags & BRIDGE_VLAN_INFO_UNTAGGED) 1644 info.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 1645 if (flags & BRIDGE_VLAN_INFO_PVID) 1646 info.flags |= BRIDGE_VLAN_INFO_PVID; 1647 1648 if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info)) 1649 goto out_err; 1650 1651 if (vid_range && vid < vid_range && 1652 !(flags & BRIDGE_VLAN_INFO_PVID) && 1653 nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range)) 1654 goto out_err; 1655 1656 if (v_opts) { 1657 if (!br_vlan_opts_fill(skb, v_opts)) 1658 goto out_err; 1659 1660 if (dump_stats && !br_vlan_stats_fill(skb, v_opts)) 1661 goto out_err; 1662 } 1663 1664 nla_nest_end(skb, nest); 1665 1666 return true; 1667 1668 out_err: 1669 nla_nest_cancel(skb, nest); 1670 return false; 1671 } 1672 1673 static size_t rtnl_vlan_nlmsg_size(void) 1674 { 1675 return NLMSG_ALIGN(sizeof(struct br_vlan_msg)) 1676 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */ 1677 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */ 1678 + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */ 1679 + br_vlan_opts_nl_size(); /* bridge vlan options */ 1680 } 1681 1682 void br_vlan_notify(const struct net_bridge *br, 1683 const struct net_bridge_port *p, 1684 u16 vid, u16 vid_range, 1685 int cmd) 1686 { 1687 struct net_bridge_vlan_group *vg; 1688 struct net_bridge_vlan *v = NULL; 1689 struct br_vlan_msg *bvm; 1690 struct nlmsghdr *nlh; 1691 struct sk_buff *skb; 1692 int err = -ENOBUFS; 1693 struct net *net; 1694 u16 flags = 0; 1695 int ifindex; 1696 1697 /* right now notifications are done only with rtnl held */ 1698 ASSERT_RTNL(); 1699 1700 if (p) { 1701 ifindex = p->dev->ifindex; 1702 vg = nbp_vlan_group(p); 1703 net = dev_net(p->dev); 1704 } else { 1705 ifindex = br->dev->ifindex; 1706 vg = br_vlan_group(br); 1707 net = dev_net(br->dev); 1708 } 1709 1710 skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL); 1711 if (!skb) 1712 goto out_err; 1713 1714 err = -EMSGSIZE; 1715 nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0); 1716 if (!nlh) 1717 goto out_err; 1718 bvm = nlmsg_data(nlh); 1719 memset(bvm, 0, sizeof(*bvm)); 1720 bvm->family = AF_BRIDGE; 1721 bvm->ifindex = ifindex; 1722 1723 switch (cmd) { 1724 case RTM_NEWVLAN: 1725 /* need to find the vlan due to flags/options */ 1726 v = br_vlan_find(vg, vid); 1727 if (!v || !br_vlan_should_use(v)) 1728 goto out_kfree; 1729 1730 flags = v->flags; 1731 if (br_get_pvid(vg) == v->vid) 1732 flags |= BRIDGE_VLAN_INFO_PVID; 1733 break; 1734 case RTM_DELVLAN: 1735 break; 1736 default: 1737 goto out_kfree; 1738 } 1739 1740 if (!br_vlan_fill_vids(skb, vid, vid_range, v, flags, false)) 1741 goto out_err; 1742 1743 nlmsg_end(skb, nlh); 1744 rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL); 1745 return; 1746 1747 out_err: 1748 rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err); 1749 out_kfree: 1750 kfree_skb(skb); 1751 } 1752 1753 /* check if v_curr can enter a range ending in range_end */ 1754 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1755 const struct net_bridge_vlan *range_end) 1756 { 1757 return v_curr->vid - range_end->vid == 1 && 1758 range_end->flags == v_curr->flags && 1759 br_vlan_opts_eq_range(v_curr, range_end); 1760 } 1761 1762 static int br_vlan_dump_dev(const struct net_device *dev, 1763 struct sk_buff *skb, 1764 struct netlink_callback *cb, 1765 u32 dump_flags) 1766 { 1767 struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL; 1768 bool dump_stats = !!(dump_flags & BRIDGE_VLANDB_DUMPF_STATS); 1769 struct net_bridge_vlan_group *vg; 1770 int idx = 0, s_idx = cb->args[1]; 1771 struct nlmsghdr *nlh = NULL; 1772 struct net_bridge_port *p; 1773 struct br_vlan_msg *bvm; 1774 struct net_bridge *br; 1775 int err = 0; 1776 u16 pvid; 1777 1778 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) 1779 return -EINVAL; 1780 1781 if (netif_is_bridge_master(dev)) { 1782 br = netdev_priv(dev); 1783 vg = br_vlan_group_rcu(br); 1784 p = NULL; 1785 } else { 1786 p = br_port_get_rcu(dev); 1787 if (WARN_ON(!p)) 1788 return -EINVAL; 1789 vg = nbp_vlan_group_rcu(p); 1790 br = p->br; 1791 } 1792 1793 if (!vg) 1794 return 0; 1795 1796 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 1797 RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI); 1798 if (!nlh) 1799 return -EMSGSIZE; 1800 bvm = nlmsg_data(nlh); 1801 memset(bvm, 0, sizeof(*bvm)); 1802 bvm->family = PF_BRIDGE; 1803 bvm->ifindex = dev->ifindex; 1804 pvid = br_get_pvid(vg); 1805 1806 /* idx must stay at range's beginning until it is filled in */ 1807 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 1808 if (!br_vlan_should_use(v)) 1809 continue; 1810 if (idx < s_idx) { 1811 idx++; 1812 continue; 1813 } 1814 1815 if (!range_start) { 1816 range_start = v; 1817 range_end = v; 1818 continue; 1819 } 1820 1821 if (dump_stats || v->vid == pvid || 1822 !br_vlan_can_enter_range(v, range_end)) { 1823 u16 vlan_flags = br_vlan_flags(range_start, pvid); 1824 1825 if (!br_vlan_fill_vids(skb, range_start->vid, 1826 range_end->vid, range_start, 1827 vlan_flags, dump_stats)) { 1828 err = -EMSGSIZE; 1829 break; 1830 } 1831 /* advance number of filled vlans */ 1832 idx += range_end->vid - range_start->vid + 1; 1833 1834 range_start = v; 1835 } 1836 range_end = v; 1837 } 1838 1839 /* err will be 0 and range_start will be set in 3 cases here: 1840 * - first vlan (range_start == range_end) 1841 * - last vlan (range_start == range_end, not in range) 1842 * - last vlan range (range_start != range_end, in range) 1843 */ 1844 if (!err && range_start && 1845 !br_vlan_fill_vids(skb, range_start->vid, range_end->vid, 1846 range_start, br_vlan_flags(range_start, pvid), 1847 dump_stats)) 1848 err = -EMSGSIZE; 1849 1850 cb->args[1] = err ? idx : 0; 1851 1852 nlmsg_end(skb, nlh); 1853 1854 return err; 1855 } 1856 1857 static const struct nla_policy br_vlan_db_dump_pol[BRIDGE_VLANDB_DUMP_MAX + 1] = { 1858 [BRIDGE_VLANDB_DUMP_FLAGS] = { .type = NLA_U32 }, 1859 }; 1860 1861 static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb) 1862 { 1863 struct nlattr *dtb[BRIDGE_VLANDB_DUMP_MAX + 1]; 1864 int idx = 0, err = 0, s_idx = cb->args[0]; 1865 struct net *net = sock_net(skb->sk); 1866 struct br_vlan_msg *bvm; 1867 struct net_device *dev; 1868 u32 dump_flags = 0; 1869 1870 err = nlmsg_parse(cb->nlh, sizeof(*bvm), dtb, BRIDGE_VLANDB_DUMP_MAX, 1871 br_vlan_db_dump_pol, cb->extack); 1872 if (err < 0) 1873 return err; 1874 1875 bvm = nlmsg_data(cb->nlh); 1876 if (dtb[BRIDGE_VLANDB_DUMP_FLAGS]) 1877 dump_flags = nla_get_u32(dtb[BRIDGE_VLANDB_DUMP_FLAGS]); 1878 1879 rcu_read_lock(); 1880 if (bvm->ifindex) { 1881 dev = dev_get_by_index_rcu(net, bvm->ifindex); 1882 if (!dev) { 1883 err = -ENODEV; 1884 goto out_err; 1885 } 1886 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 1887 if (err && err != -EMSGSIZE) 1888 goto out_err; 1889 } else { 1890 for_each_netdev_rcu(net, dev) { 1891 if (idx < s_idx) 1892 goto skip; 1893 1894 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 1895 if (err == -EMSGSIZE) 1896 break; 1897 skip: 1898 idx++; 1899 } 1900 } 1901 cb->args[0] = idx; 1902 rcu_read_unlock(); 1903 1904 return skb->len; 1905 1906 out_err: 1907 rcu_read_unlock(); 1908 1909 return err; 1910 } 1911 1912 static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = { 1913 [BRIDGE_VLANDB_ENTRY_INFO] = 1914 NLA_POLICY_EXACT_LEN(sizeof(struct bridge_vlan_info)), 1915 [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 }, 1916 [BRIDGE_VLANDB_ENTRY_STATE] = { .type = NLA_U8 }, 1917 [BRIDGE_VLANDB_ENTRY_TUNNEL_INFO] = { .type = NLA_NESTED }, 1918 }; 1919 1920 static int br_vlan_rtm_process_one(struct net_device *dev, 1921 const struct nlattr *attr, 1922 int cmd, struct netlink_ext_ack *extack) 1923 { 1924 struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL; 1925 struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1]; 1926 bool changed = false, skip_processing = false; 1927 struct net_bridge_vlan_group *vg; 1928 struct net_bridge_port *p = NULL; 1929 int err = 0, cmdmap = 0; 1930 struct net_bridge *br; 1931 1932 if (netif_is_bridge_master(dev)) { 1933 br = netdev_priv(dev); 1934 vg = br_vlan_group(br); 1935 } else { 1936 p = br_port_get_rtnl(dev); 1937 if (WARN_ON(!p)) 1938 return -ENODEV; 1939 br = p->br; 1940 vg = nbp_vlan_group(p); 1941 } 1942 1943 if (WARN_ON(!vg)) 1944 return -ENODEV; 1945 1946 err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr, 1947 br_vlan_db_policy, extack); 1948 if (err) 1949 return err; 1950 1951 if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) { 1952 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info"); 1953 return -EINVAL; 1954 } 1955 memset(&vrange_end, 0, sizeof(vrange_end)); 1956 1957 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]); 1958 if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 1959 BRIDGE_VLAN_INFO_RANGE_END)) { 1960 NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls"); 1961 return -EINVAL; 1962 } 1963 if (!br_vlan_valid_id(vinfo->vid, extack)) 1964 return -EINVAL; 1965 1966 if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) { 1967 vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]); 1968 /* validate user-provided flags without RANGE_BEGIN */ 1969 vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags; 1970 vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; 1971 1972 /* vinfo_last is the range start, vinfo the range end */ 1973 vinfo_last = vinfo; 1974 vinfo = &vrange_end; 1975 1976 if (!br_vlan_valid_id(vinfo->vid, extack) || 1977 !br_vlan_valid_range(vinfo, vinfo_last, extack)) 1978 return -EINVAL; 1979 } 1980 1981 switch (cmd) { 1982 case RTM_NEWVLAN: 1983 cmdmap = RTM_SETLINK; 1984 skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS); 1985 break; 1986 case RTM_DELVLAN: 1987 cmdmap = RTM_DELLINK; 1988 break; 1989 } 1990 1991 if (!skip_processing) { 1992 struct bridge_vlan_info *tmp_last = vinfo_last; 1993 1994 /* br_process_vlan_info may overwrite vinfo_last */ 1995 err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last, 1996 &changed, extack); 1997 1998 /* notify first if anything changed */ 1999 if (changed) 2000 br_ifinfo_notify(cmdmap, br, p); 2001 2002 if (err) 2003 return err; 2004 } 2005 2006 /* deal with options */ 2007 if (cmd == RTM_NEWVLAN) { 2008 struct net_bridge_vlan *range_start, *range_end; 2009 2010 if (vinfo_last) { 2011 range_start = br_vlan_find(vg, vinfo_last->vid); 2012 range_end = br_vlan_find(vg, vinfo->vid); 2013 } else { 2014 range_start = br_vlan_find(vg, vinfo->vid); 2015 range_end = range_start; 2016 } 2017 2018 err = br_vlan_process_options(br, p, range_start, range_end, 2019 tb, extack); 2020 } 2021 2022 return err; 2023 } 2024 2025 static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh, 2026 struct netlink_ext_ack *extack) 2027 { 2028 struct net *net = sock_net(skb->sk); 2029 struct br_vlan_msg *bvm; 2030 struct net_device *dev; 2031 struct nlattr *attr; 2032 int err, vlans = 0; 2033 int rem; 2034 2035 /* this should validate the header and check for remaining bytes */ 2036 err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL, 2037 extack); 2038 if (err < 0) 2039 return err; 2040 2041 bvm = nlmsg_data(nlh); 2042 dev = __dev_get_by_index(net, bvm->ifindex); 2043 if (!dev) 2044 return -ENODEV; 2045 2046 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) { 2047 NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port"); 2048 return -EINVAL; 2049 } 2050 2051 nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) { 2052 if (nla_type(attr) != BRIDGE_VLANDB_ENTRY) 2053 continue; 2054 2055 vlans++; 2056 err = br_vlan_rtm_process_one(dev, attr, nlh->nlmsg_type, 2057 extack); 2058 if (err) 2059 break; 2060 } 2061 if (!vlans) { 2062 NL_SET_ERR_MSG_MOD(extack, "No vlans found to process"); 2063 err = -EINVAL; 2064 } 2065 2066 return err; 2067 } 2068 2069 void br_vlan_rtnl_init(void) 2070 { 2071 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL, 2072 br_vlan_rtm_dump, 0); 2073 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN, 2074 br_vlan_rtm_process, NULL, 0); 2075 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN, 2076 br_vlan_rtm_process, NULL, 0); 2077 } 2078 2079 void br_vlan_rtnl_uninit(void) 2080 { 2081 rtnl_unregister(PF_BRIDGE, RTM_GETVLAN); 2082 rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN); 2083 rtnl_unregister(PF_BRIDGE, RTM_DELVLAN); 2084 } 2085