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 break; 118 } 119 list_add_rcu(&v->vlist, hpos); 120 } 121 122 static void __vlan_del_list(struct net_bridge_vlan *v) 123 { 124 list_del_rcu(&v->vlist); 125 } 126 127 static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br, 128 const struct net_bridge_vlan *v) 129 { 130 int err; 131 132 /* Try switchdev op first. In case it is not supported, fallback to 133 * 8021q del. 134 */ 135 err = br_switchdev_port_vlan_del(dev, v->vid); 136 if (!(v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV)) 137 vlan_vid_del(dev, br->vlan_proto, v->vid); 138 return err == -EOPNOTSUPP ? 0 : err; 139 } 140 141 /* Returns a master vlan, if it didn't exist it gets created. In all cases 142 * a reference is taken to the master vlan before returning. 143 */ 144 static struct net_bridge_vlan * 145 br_vlan_get_master(struct net_bridge *br, u16 vid, 146 struct netlink_ext_ack *extack) 147 { 148 struct net_bridge_vlan_group *vg; 149 struct net_bridge_vlan *masterv; 150 151 vg = br_vlan_group(br); 152 masterv = br_vlan_find(vg, vid); 153 if (!masterv) { 154 bool changed; 155 156 /* missing global ctx, create it now */ 157 if (br_vlan_add(br, vid, 0, &changed, extack)) 158 return NULL; 159 masterv = br_vlan_find(vg, vid); 160 if (WARN_ON(!masterv)) 161 return NULL; 162 refcount_set(&masterv->refcnt, 1); 163 return masterv; 164 } 165 refcount_inc(&masterv->refcnt); 166 167 return masterv; 168 } 169 170 static void br_master_vlan_rcu_free(struct rcu_head *rcu) 171 { 172 struct net_bridge_vlan *v; 173 174 v = container_of(rcu, struct net_bridge_vlan, rcu); 175 WARN_ON(!br_vlan_is_master(v)); 176 free_percpu(v->stats); 177 v->stats = NULL; 178 kfree(v); 179 } 180 181 static void br_vlan_put_master(struct net_bridge_vlan *masterv) 182 { 183 struct net_bridge_vlan_group *vg; 184 185 if (!br_vlan_is_master(masterv)) 186 return; 187 188 vg = br_vlan_group(masterv->br); 189 if (refcount_dec_and_test(&masterv->refcnt)) { 190 rhashtable_remove_fast(&vg->vlan_hash, 191 &masterv->vnode, br_vlan_rht_params); 192 __vlan_del_list(masterv); 193 call_rcu(&masterv->rcu, br_master_vlan_rcu_free); 194 } 195 } 196 197 static void nbp_vlan_rcu_free(struct rcu_head *rcu) 198 { 199 struct net_bridge_vlan *v; 200 201 v = container_of(rcu, struct net_bridge_vlan, rcu); 202 WARN_ON(br_vlan_is_master(v)); 203 /* if we had per-port stats configured then free them here */ 204 if (v->priv_flags & BR_VLFLAG_PER_PORT_STATS) 205 free_percpu(v->stats); 206 v->stats = NULL; 207 kfree(v); 208 } 209 210 /* This is the shared VLAN add function which works for both ports and bridge 211 * devices. There are four possible calls to this function in terms of the 212 * vlan entry type: 213 * 1. vlan is being added on a port (no master flags, global entry exists) 214 * 2. vlan is being added on a bridge (both master and brentry flags) 215 * 3. vlan is being added on a port, but a global entry didn't exist which 216 * is being created right now (master flag set, brentry flag unset), the 217 * global entry is used for global per-vlan features, but not for filtering 218 * 4. same as 3 but with both master and brentry flags set so the entry 219 * will be used for filtering in both the port and the bridge 220 */ 221 static int __vlan_add(struct net_bridge_vlan *v, u16 flags, 222 struct netlink_ext_ack *extack) 223 { 224 struct net_bridge_vlan *masterv = NULL; 225 struct net_bridge_port *p = NULL; 226 struct net_bridge_vlan_group *vg; 227 struct net_device *dev; 228 struct net_bridge *br; 229 int err; 230 231 if (br_vlan_is_master(v)) { 232 br = v->br; 233 dev = br->dev; 234 vg = br_vlan_group(br); 235 } else { 236 p = v->port; 237 br = p->br; 238 dev = p->dev; 239 vg = nbp_vlan_group(p); 240 } 241 242 if (p) { 243 /* Add VLAN to the device filter if it is supported. 244 * This ensures tagged traffic enters the bridge when 245 * promiscuous mode is disabled by br_manage_promisc(). 246 */ 247 err = __vlan_vid_add(dev, br, v, flags, extack); 248 if (err) 249 goto out; 250 251 /* need to work on the master vlan too */ 252 if (flags & BRIDGE_VLAN_INFO_MASTER) { 253 bool changed; 254 255 err = br_vlan_add(br, v->vid, 256 flags | BRIDGE_VLAN_INFO_BRENTRY, 257 &changed, extack); 258 if (err) 259 goto out_filt; 260 261 if (changed) 262 br_vlan_notify(br, NULL, v->vid, 0, 263 RTM_NEWVLAN); 264 } 265 266 masterv = br_vlan_get_master(br, v->vid, extack); 267 if (!masterv) { 268 err = -ENOMEM; 269 goto out_filt; 270 } 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 struct netlink_ext_ack *extack) 809 { 810 struct switchdev_attr attr = { 811 .orig_dev = br->dev, 812 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 813 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 814 .u.vlan_filtering = val, 815 }; 816 int err; 817 818 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val) 819 return 0; 820 821 err = switchdev_port_attr_set(br->dev, &attr, extack); 822 if (err && err != -EOPNOTSUPP) 823 return err; 824 825 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val); 826 br_manage_promisc(br); 827 recalculate_group_addr(br); 828 br_recalculate_fwd_mask(br); 829 830 return 0; 831 } 832 833 bool br_vlan_enabled(const struct net_device *dev) 834 { 835 struct net_bridge *br = netdev_priv(dev); 836 837 return br_opt_get(br, BROPT_VLAN_ENABLED); 838 } 839 EXPORT_SYMBOL_GPL(br_vlan_enabled); 840 841 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto) 842 { 843 struct net_bridge *br = netdev_priv(dev); 844 845 *p_proto = ntohs(br->vlan_proto); 846 847 return 0; 848 } 849 EXPORT_SYMBOL_GPL(br_vlan_get_proto); 850 851 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 852 struct netlink_ext_ack *extack) 853 { 854 struct switchdev_attr attr = { 855 .orig_dev = br->dev, 856 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL, 857 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 858 .u.vlan_protocol = ntohs(proto), 859 }; 860 int err = 0; 861 struct net_bridge_port *p; 862 struct net_bridge_vlan *vlan; 863 struct net_bridge_vlan_group *vg; 864 __be16 oldproto = br->vlan_proto; 865 866 if (br->vlan_proto == proto) 867 return 0; 868 869 err = switchdev_port_attr_set(br->dev, &attr, extack); 870 if (err && err != -EOPNOTSUPP) 871 return err; 872 873 /* Add VLANs for the new proto to the device filter. */ 874 list_for_each_entry(p, &br->port_list, list) { 875 vg = nbp_vlan_group(p); 876 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 877 err = vlan_vid_add(p->dev, proto, vlan->vid); 878 if (err) 879 goto err_filt; 880 } 881 } 882 883 br->vlan_proto = proto; 884 885 recalculate_group_addr(br); 886 br_recalculate_fwd_mask(br); 887 888 /* Delete VLANs for the old proto from the device filter. */ 889 list_for_each_entry(p, &br->port_list, list) { 890 vg = nbp_vlan_group(p); 891 list_for_each_entry(vlan, &vg->vlan_list, vlist) 892 vlan_vid_del(p->dev, oldproto, vlan->vid); 893 } 894 895 return 0; 896 897 err_filt: 898 attr.u.vlan_protocol = ntohs(oldproto); 899 switchdev_port_attr_set(br->dev, &attr, NULL); 900 901 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist) 902 vlan_vid_del(p->dev, proto, vlan->vid); 903 904 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 905 vg = nbp_vlan_group(p); 906 list_for_each_entry(vlan, &vg->vlan_list, vlist) 907 vlan_vid_del(p->dev, proto, vlan->vid); 908 } 909 910 return err; 911 } 912 913 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 914 struct netlink_ext_ack *extack) 915 { 916 if (!eth_type_vlan(htons(val))) 917 return -EPROTONOSUPPORT; 918 919 return __br_vlan_set_proto(br, htons(val), extack); 920 } 921 922 int br_vlan_set_stats(struct net_bridge *br, unsigned long val) 923 { 924 switch (val) { 925 case 0: 926 case 1: 927 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val); 928 break; 929 default: 930 return -EINVAL; 931 } 932 933 return 0; 934 } 935 936 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val) 937 { 938 struct net_bridge_port *p; 939 940 /* allow to change the option if there are no port vlans configured */ 941 list_for_each_entry(p, &br->port_list, list) { 942 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 943 944 if (vg->num_vlans) 945 return -EBUSY; 946 } 947 948 switch (val) { 949 case 0: 950 case 1: 951 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val); 952 break; 953 default: 954 return -EINVAL; 955 } 956 957 return 0; 958 } 959 960 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid) 961 { 962 struct net_bridge_vlan *v; 963 964 if (vid != vg->pvid) 965 return false; 966 967 v = br_vlan_lookup(&vg->vlan_hash, vid); 968 if (v && br_vlan_should_use(v) && 969 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 970 return true; 971 972 return false; 973 } 974 975 static void br_vlan_disable_default_pvid(struct net_bridge *br) 976 { 977 struct net_bridge_port *p; 978 u16 pvid = br->default_pvid; 979 980 /* Disable default_pvid on all ports where it is still 981 * configured. 982 */ 983 if (vlan_default_pvid(br_vlan_group(br), pvid)) { 984 if (!br_vlan_delete(br, pvid)) 985 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); 986 } 987 988 list_for_each_entry(p, &br->port_list, list) { 989 if (vlan_default_pvid(nbp_vlan_group(p), pvid) && 990 !nbp_vlan_delete(p, pvid)) 991 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); 992 } 993 994 br->default_pvid = 0; 995 } 996 997 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 998 struct netlink_ext_ack *extack) 999 { 1000 const struct net_bridge_vlan *pvent; 1001 struct net_bridge_vlan_group *vg; 1002 struct net_bridge_port *p; 1003 unsigned long *changed; 1004 bool vlchange; 1005 u16 old_pvid; 1006 int err = 0; 1007 1008 if (!pvid) { 1009 br_vlan_disable_default_pvid(br); 1010 return 0; 1011 } 1012 1013 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL); 1014 if (!changed) 1015 return -ENOMEM; 1016 1017 old_pvid = br->default_pvid; 1018 1019 /* Update default_pvid config only if we do not conflict with 1020 * user configuration. 1021 */ 1022 vg = br_vlan_group(br); 1023 pvent = br_vlan_find(vg, pvid); 1024 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) && 1025 (!pvent || !br_vlan_should_use(pvent))) { 1026 err = br_vlan_add(br, pvid, 1027 BRIDGE_VLAN_INFO_PVID | 1028 BRIDGE_VLAN_INFO_UNTAGGED | 1029 BRIDGE_VLAN_INFO_BRENTRY, 1030 &vlchange, extack); 1031 if (err) 1032 goto out; 1033 1034 if (br_vlan_delete(br, old_pvid)) 1035 br_vlan_notify(br, NULL, old_pvid, 0, RTM_DELVLAN); 1036 br_vlan_notify(br, NULL, pvid, 0, RTM_NEWVLAN); 1037 set_bit(0, changed); 1038 } 1039 1040 list_for_each_entry(p, &br->port_list, list) { 1041 /* Update default_pvid config only if we do not conflict with 1042 * user configuration. 1043 */ 1044 vg = nbp_vlan_group(p); 1045 if ((old_pvid && 1046 !vlan_default_pvid(vg, old_pvid)) || 1047 br_vlan_find(vg, pvid)) 1048 continue; 1049 1050 err = nbp_vlan_add(p, pvid, 1051 BRIDGE_VLAN_INFO_PVID | 1052 BRIDGE_VLAN_INFO_UNTAGGED, 1053 &vlchange, extack); 1054 if (err) 1055 goto err_port; 1056 if (nbp_vlan_delete(p, old_pvid)) 1057 br_vlan_notify(br, p, old_pvid, 0, RTM_DELVLAN); 1058 br_vlan_notify(p->br, p, pvid, 0, RTM_NEWVLAN); 1059 set_bit(p->port_no, changed); 1060 } 1061 1062 br->default_pvid = pvid; 1063 1064 out: 1065 bitmap_free(changed); 1066 return err; 1067 1068 err_port: 1069 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 1070 if (!test_bit(p->port_no, changed)) 1071 continue; 1072 1073 if (old_pvid) { 1074 nbp_vlan_add(p, old_pvid, 1075 BRIDGE_VLAN_INFO_PVID | 1076 BRIDGE_VLAN_INFO_UNTAGGED, 1077 &vlchange, NULL); 1078 br_vlan_notify(p->br, p, old_pvid, 0, RTM_NEWVLAN); 1079 } 1080 nbp_vlan_delete(p, pvid); 1081 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); 1082 } 1083 1084 if (test_bit(0, changed)) { 1085 if (old_pvid) { 1086 br_vlan_add(br, old_pvid, 1087 BRIDGE_VLAN_INFO_PVID | 1088 BRIDGE_VLAN_INFO_UNTAGGED | 1089 BRIDGE_VLAN_INFO_BRENTRY, 1090 &vlchange, NULL); 1091 br_vlan_notify(br, NULL, old_pvid, 0, RTM_NEWVLAN); 1092 } 1093 br_vlan_delete(br, pvid); 1094 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); 1095 } 1096 goto out; 1097 } 1098 1099 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1100 struct netlink_ext_ack *extack) 1101 { 1102 u16 pvid = val; 1103 int err = 0; 1104 1105 if (val >= VLAN_VID_MASK) 1106 return -EINVAL; 1107 1108 if (pvid == br->default_pvid) 1109 goto out; 1110 1111 /* Only allow default pvid change when filtering is disabled */ 1112 if (br_opt_get(br, BROPT_VLAN_ENABLED)) { 1113 pr_info_once("Please disable vlan filtering to change default_pvid\n"); 1114 err = -EPERM; 1115 goto out; 1116 } 1117 err = __br_vlan_set_default_pvid(br, pvid, extack); 1118 out: 1119 return err; 1120 } 1121 1122 int br_vlan_init(struct net_bridge *br) 1123 { 1124 struct net_bridge_vlan_group *vg; 1125 int ret = -ENOMEM; 1126 1127 vg = kzalloc(sizeof(*vg), GFP_KERNEL); 1128 if (!vg) 1129 goto out; 1130 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1131 if (ret) 1132 goto err_rhtbl; 1133 ret = vlan_tunnel_init(vg); 1134 if (ret) 1135 goto err_tunnel_init; 1136 INIT_LIST_HEAD(&vg->vlan_list); 1137 br->vlan_proto = htons(ETH_P_8021Q); 1138 br->default_pvid = 1; 1139 rcu_assign_pointer(br->vlgrp, vg); 1140 1141 out: 1142 return ret; 1143 1144 err_tunnel_init: 1145 rhashtable_destroy(&vg->vlan_hash); 1146 err_rhtbl: 1147 kfree(vg); 1148 1149 goto out; 1150 } 1151 1152 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack) 1153 { 1154 struct switchdev_attr attr = { 1155 .orig_dev = p->br->dev, 1156 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 1157 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 1158 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED), 1159 }; 1160 struct net_bridge_vlan_group *vg; 1161 int ret = -ENOMEM; 1162 1163 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); 1164 if (!vg) 1165 goto out; 1166 1167 ret = switchdev_port_attr_set(p->dev, &attr, extack); 1168 if (ret && ret != -EOPNOTSUPP) 1169 goto err_vlan_enabled; 1170 1171 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1172 if (ret) 1173 goto err_rhtbl; 1174 ret = vlan_tunnel_init(vg); 1175 if (ret) 1176 goto err_tunnel_init; 1177 INIT_LIST_HEAD(&vg->vlan_list); 1178 rcu_assign_pointer(p->vlgrp, vg); 1179 if (p->br->default_pvid) { 1180 bool changed; 1181 1182 ret = nbp_vlan_add(p, p->br->default_pvid, 1183 BRIDGE_VLAN_INFO_PVID | 1184 BRIDGE_VLAN_INFO_UNTAGGED, 1185 &changed, extack); 1186 if (ret) 1187 goto err_vlan_add; 1188 br_vlan_notify(p->br, p, p->br->default_pvid, 0, RTM_NEWVLAN); 1189 } 1190 out: 1191 return ret; 1192 1193 err_vlan_add: 1194 RCU_INIT_POINTER(p->vlgrp, NULL); 1195 synchronize_rcu(); 1196 vlan_tunnel_deinit(vg); 1197 err_tunnel_init: 1198 rhashtable_destroy(&vg->vlan_hash); 1199 err_rhtbl: 1200 err_vlan_enabled: 1201 kfree(vg); 1202 1203 goto out; 1204 } 1205 1206 /* Must be protected by RTNL. 1207 * Must be called with vid in range from 1 to 4094 inclusive. 1208 * changed must be true only if the vlan was created or updated 1209 */ 1210 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1211 bool *changed, struct netlink_ext_ack *extack) 1212 { 1213 struct net_bridge_vlan *vlan; 1214 int ret; 1215 1216 ASSERT_RTNL(); 1217 1218 *changed = false; 1219 vlan = br_vlan_find(nbp_vlan_group(port), vid); 1220 if (vlan) { 1221 /* Pass the flags to the hardware bridge */ 1222 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack); 1223 if (ret && ret != -EOPNOTSUPP) 1224 return ret; 1225 *changed = __vlan_add_flags(vlan, flags); 1226 1227 return 0; 1228 } 1229 1230 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 1231 if (!vlan) 1232 return -ENOMEM; 1233 1234 vlan->vid = vid; 1235 vlan->port = port; 1236 ret = __vlan_add(vlan, flags, extack); 1237 if (ret) 1238 kfree(vlan); 1239 else 1240 *changed = true; 1241 1242 return ret; 1243 } 1244 1245 /* Must be protected by RTNL. 1246 * Must be called with vid in range from 1 to 4094 inclusive. 1247 */ 1248 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1249 { 1250 struct net_bridge_vlan *v; 1251 1252 ASSERT_RTNL(); 1253 1254 v = br_vlan_find(nbp_vlan_group(port), vid); 1255 if (!v) 1256 return -ENOENT; 1257 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); 1258 br_fdb_delete_by_port(port->br, port, vid, 0); 1259 1260 return __vlan_del(v); 1261 } 1262 1263 void nbp_vlan_flush(struct net_bridge_port *port) 1264 { 1265 struct net_bridge_vlan_group *vg; 1266 1267 ASSERT_RTNL(); 1268 1269 vg = nbp_vlan_group(port); 1270 __vlan_flush(port->br, port, vg); 1271 RCU_INIT_POINTER(port->vlgrp, NULL); 1272 synchronize_rcu(); 1273 __vlan_group_free(vg); 1274 } 1275 1276 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1277 struct pcpu_sw_netstats *stats) 1278 { 1279 int i; 1280 1281 memset(stats, 0, sizeof(*stats)); 1282 for_each_possible_cpu(i) { 1283 u64 rxpackets, rxbytes, txpackets, txbytes; 1284 struct pcpu_sw_netstats *cpu_stats; 1285 unsigned int start; 1286 1287 cpu_stats = per_cpu_ptr(v->stats, i); 1288 do { 1289 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 1290 rxpackets = cpu_stats->rx_packets; 1291 rxbytes = cpu_stats->rx_bytes; 1292 txbytes = cpu_stats->tx_bytes; 1293 txpackets = cpu_stats->tx_packets; 1294 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 1295 1296 stats->rx_packets += rxpackets; 1297 stats->rx_bytes += rxbytes; 1298 stats->tx_bytes += txbytes; 1299 stats->tx_packets += txpackets; 1300 } 1301 } 1302 1303 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 1304 { 1305 struct net_bridge_vlan_group *vg; 1306 struct net_bridge_port *p; 1307 1308 ASSERT_RTNL(); 1309 p = br_port_get_check_rtnl(dev); 1310 if (p) 1311 vg = nbp_vlan_group(p); 1312 else if (netif_is_bridge_master(dev)) 1313 vg = br_vlan_group(netdev_priv(dev)); 1314 else 1315 return -EINVAL; 1316 1317 *p_pvid = br_get_pvid(vg); 1318 return 0; 1319 } 1320 EXPORT_SYMBOL_GPL(br_vlan_get_pvid); 1321 1322 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) 1323 { 1324 struct net_bridge_vlan_group *vg; 1325 struct net_bridge_port *p; 1326 1327 p = br_port_get_check_rcu(dev); 1328 if (p) 1329 vg = nbp_vlan_group_rcu(p); 1330 else if (netif_is_bridge_master(dev)) 1331 vg = br_vlan_group_rcu(netdev_priv(dev)); 1332 else 1333 return -EINVAL; 1334 1335 *p_pvid = br_get_pvid(vg); 1336 return 0; 1337 } 1338 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu); 1339 1340 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1341 struct net_device_path_ctx *ctx, 1342 struct net_device_path *path) 1343 { 1344 struct net_bridge_vlan_group *vg; 1345 int idx = ctx->num_vlans - 1; 1346 u16 vid; 1347 1348 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_KEEP; 1349 1350 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 1351 return; 1352 1353 vg = br_vlan_group(br); 1354 1355 if (idx >= 0 && 1356 ctx->vlan[idx].proto == br->vlan_proto) { 1357 vid = ctx->vlan[idx].id; 1358 } else { 1359 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_TAG; 1360 vid = br_get_pvid(vg); 1361 } 1362 1363 path->bridge.vlan_id = vid; 1364 path->bridge.vlan_proto = br->vlan_proto; 1365 } 1366 1367 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1368 struct net_bridge_port *dst, 1369 struct net_device_path *path) 1370 { 1371 struct net_bridge_vlan_group *vg; 1372 struct net_bridge_vlan *v; 1373 1374 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 1375 return 0; 1376 1377 vg = nbp_vlan_group_rcu(dst); 1378 v = br_vlan_find(vg, path->bridge.vlan_id); 1379 if (!v || !br_vlan_should_use(v)) 1380 return -EINVAL; 1381 1382 if (!(v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 1383 return 0; 1384 1385 if (path->bridge.vlan_mode == DEV_PATH_BR_VLAN_TAG) 1386 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_KEEP; 1387 else if (v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV) 1388 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_UNTAG_HW; 1389 else 1390 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_UNTAG; 1391 1392 return 0; 1393 } 1394 1395 int br_vlan_get_info(const struct net_device *dev, u16 vid, 1396 struct bridge_vlan_info *p_vinfo) 1397 { 1398 struct net_bridge_vlan_group *vg; 1399 struct net_bridge_vlan *v; 1400 struct net_bridge_port *p; 1401 1402 ASSERT_RTNL(); 1403 p = br_port_get_check_rtnl(dev); 1404 if (p) 1405 vg = nbp_vlan_group(p); 1406 else if (netif_is_bridge_master(dev)) 1407 vg = br_vlan_group(netdev_priv(dev)); 1408 else 1409 return -EINVAL; 1410 1411 v = br_vlan_find(vg, vid); 1412 if (!v) 1413 return -ENOENT; 1414 1415 p_vinfo->vid = vid; 1416 p_vinfo->flags = v->flags; 1417 if (vid == br_get_pvid(vg)) 1418 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID; 1419 return 0; 1420 } 1421 EXPORT_SYMBOL_GPL(br_vlan_get_info); 1422 1423 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev) 1424 { 1425 return is_vlan_dev(dev) && 1426 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING); 1427 } 1428 1429 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev, 1430 __always_unused struct netdev_nested_priv *priv) 1431 { 1432 return br_vlan_is_bind_vlan_dev(dev); 1433 } 1434 1435 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev) 1436 { 1437 int found; 1438 1439 rcu_read_lock(); 1440 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn, 1441 NULL); 1442 rcu_read_unlock(); 1443 1444 return !!found; 1445 } 1446 1447 struct br_vlan_bind_walk_data { 1448 u16 vid; 1449 struct net_device *result; 1450 }; 1451 1452 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev, 1453 struct netdev_nested_priv *priv) 1454 { 1455 struct br_vlan_bind_walk_data *data = priv->data; 1456 int found = 0; 1457 1458 if (br_vlan_is_bind_vlan_dev(dev) && 1459 vlan_dev_priv(dev)->vlan_id == data->vid) { 1460 data->result = dev; 1461 found = 1; 1462 } 1463 1464 return found; 1465 } 1466 1467 static struct net_device * 1468 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid) 1469 { 1470 struct br_vlan_bind_walk_data data = { 1471 .vid = vid, 1472 }; 1473 struct netdev_nested_priv priv = { 1474 .data = (void *)&data, 1475 }; 1476 1477 rcu_read_lock(); 1478 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn, 1479 &priv); 1480 rcu_read_unlock(); 1481 1482 return data.result; 1483 } 1484 1485 static bool br_vlan_is_dev_up(const struct net_device *dev) 1486 { 1487 return !!(dev->flags & IFF_UP) && netif_oper_up(dev); 1488 } 1489 1490 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br, 1491 struct net_device *vlan_dev) 1492 { 1493 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id; 1494 struct net_bridge_vlan_group *vg; 1495 struct net_bridge_port *p; 1496 bool has_carrier = false; 1497 1498 if (!netif_carrier_ok(br->dev)) { 1499 netif_carrier_off(vlan_dev); 1500 return; 1501 } 1502 1503 list_for_each_entry(p, &br->port_list, list) { 1504 vg = nbp_vlan_group(p); 1505 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) { 1506 has_carrier = true; 1507 break; 1508 } 1509 } 1510 1511 if (has_carrier) 1512 netif_carrier_on(vlan_dev); 1513 else 1514 netif_carrier_off(vlan_dev); 1515 } 1516 1517 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p) 1518 { 1519 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 1520 struct net_bridge_vlan *vlan; 1521 struct net_device *vlan_dev; 1522 1523 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 1524 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, 1525 vlan->vid); 1526 if (vlan_dev) { 1527 if (br_vlan_is_dev_up(p->dev)) { 1528 if (netif_carrier_ok(p->br->dev)) 1529 netif_carrier_on(vlan_dev); 1530 } else { 1531 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1532 } 1533 } 1534 } 1535 } 1536 1537 static void br_vlan_upper_change(struct net_device *dev, 1538 struct net_device *upper_dev, 1539 bool linking) 1540 { 1541 struct net_bridge *br = netdev_priv(dev); 1542 1543 if (!br_vlan_is_bind_vlan_dev(upper_dev)) 1544 return; 1545 1546 if (linking) { 1547 br_vlan_set_vlan_dev_state(br, upper_dev); 1548 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true); 1549 } else { 1550 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, 1551 br_vlan_has_upper_bind_vlan_dev(dev)); 1552 } 1553 } 1554 1555 struct br_vlan_link_state_walk_data { 1556 struct net_bridge *br; 1557 }; 1558 1559 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev, 1560 struct netdev_nested_priv *priv) 1561 { 1562 struct br_vlan_link_state_walk_data *data = priv->data; 1563 1564 if (br_vlan_is_bind_vlan_dev(vlan_dev)) 1565 br_vlan_set_vlan_dev_state(data->br, vlan_dev); 1566 1567 return 0; 1568 } 1569 1570 static void br_vlan_link_state_change(struct net_device *dev, 1571 struct net_bridge *br) 1572 { 1573 struct br_vlan_link_state_walk_data data = { 1574 .br = br 1575 }; 1576 struct netdev_nested_priv priv = { 1577 .data = (void *)&data, 1578 }; 1579 1580 rcu_read_lock(); 1581 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn, 1582 &priv); 1583 rcu_read_unlock(); 1584 } 1585 1586 /* Must be protected by RTNL. */ 1587 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid) 1588 { 1589 struct net_device *vlan_dev; 1590 1591 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1592 return; 1593 1594 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid); 1595 if (vlan_dev) 1596 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1597 } 1598 1599 /* Must be protected by RTNL. */ 1600 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr) 1601 { 1602 struct netdev_notifier_changeupper_info *info; 1603 struct net_bridge *br = netdev_priv(dev); 1604 int vlcmd = 0, ret = 0; 1605 bool changed = false; 1606 1607 switch (event) { 1608 case NETDEV_REGISTER: 1609 ret = br_vlan_add(br, br->default_pvid, 1610 BRIDGE_VLAN_INFO_PVID | 1611 BRIDGE_VLAN_INFO_UNTAGGED | 1612 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL); 1613 vlcmd = RTM_NEWVLAN; 1614 break; 1615 case NETDEV_UNREGISTER: 1616 changed = !br_vlan_delete(br, br->default_pvid); 1617 vlcmd = RTM_DELVLAN; 1618 break; 1619 case NETDEV_CHANGEUPPER: 1620 info = ptr; 1621 br_vlan_upper_change(dev, info->upper_dev, info->linking); 1622 break; 1623 1624 case NETDEV_CHANGE: 1625 case NETDEV_UP: 1626 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING)) 1627 break; 1628 br_vlan_link_state_change(dev, br); 1629 break; 1630 } 1631 if (changed) 1632 br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd); 1633 1634 return ret; 1635 } 1636 1637 /* Must be protected by RTNL. */ 1638 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event) 1639 { 1640 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1641 return; 1642 1643 switch (event) { 1644 case NETDEV_CHANGE: 1645 case NETDEV_DOWN: 1646 case NETDEV_UP: 1647 br_vlan_set_all_vlan_dev_state(p); 1648 break; 1649 } 1650 } 1651 1652 static bool br_vlan_stats_fill(struct sk_buff *skb, 1653 const struct net_bridge_vlan *v) 1654 { 1655 struct pcpu_sw_netstats stats; 1656 struct nlattr *nest; 1657 1658 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_STATS); 1659 if (!nest) 1660 return false; 1661 1662 br_vlan_get_stats(v, &stats); 1663 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES, stats.rx_bytes, 1664 BRIDGE_VLANDB_STATS_PAD) || 1665 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_PACKETS, 1666 stats.rx_packets, BRIDGE_VLANDB_STATS_PAD) || 1667 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES, stats.tx_bytes, 1668 BRIDGE_VLANDB_STATS_PAD) || 1669 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_PACKETS, 1670 stats.tx_packets, BRIDGE_VLANDB_STATS_PAD)) 1671 goto out_err; 1672 1673 nla_nest_end(skb, nest); 1674 1675 return true; 1676 1677 out_err: 1678 nla_nest_cancel(skb, nest); 1679 return false; 1680 } 1681 1682 /* v_opts is used to dump the options which must be equal in the whole range */ 1683 static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range, 1684 const struct net_bridge_vlan *v_opts, 1685 u16 flags, 1686 bool dump_stats) 1687 { 1688 struct bridge_vlan_info info; 1689 struct nlattr *nest; 1690 1691 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY); 1692 if (!nest) 1693 return false; 1694 1695 memset(&info, 0, sizeof(info)); 1696 info.vid = vid; 1697 if (flags & BRIDGE_VLAN_INFO_UNTAGGED) 1698 info.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 1699 if (flags & BRIDGE_VLAN_INFO_PVID) 1700 info.flags |= BRIDGE_VLAN_INFO_PVID; 1701 1702 if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info)) 1703 goto out_err; 1704 1705 if (vid_range && vid < vid_range && 1706 !(flags & BRIDGE_VLAN_INFO_PVID) && 1707 nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range)) 1708 goto out_err; 1709 1710 if (v_opts) { 1711 if (!br_vlan_opts_fill(skb, v_opts)) 1712 goto out_err; 1713 1714 if (dump_stats && !br_vlan_stats_fill(skb, v_opts)) 1715 goto out_err; 1716 } 1717 1718 nla_nest_end(skb, nest); 1719 1720 return true; 1721 1722 out_err: 1723 nla_nest_cancel(skb, nest); 1724 return false; 1725 } 1726 1727 static size_t rtnl_vlan_nlmsg_size(void) 1728 { 1729 return NLMSG_ALIGN(sizeof(struct br_vlan_msg)) 1730 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */ 1731 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */ 1732 + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */ 1733 + br_vlan_opts_nl_size(); /* bridge vlan options */ 1734 } 1735 1736 void br_vlan_notify(const struct net_bridge *br, 1737 const struct net_bridge_port *p, 1738 u16 vid, u16 vid_range, 1739 int cmd) 1740 { 1741 struct net_bridge_vlan_group *vg; 1742 struct net_bridge_vlan *v = NULL; 1743 struct br_vlan_msg *bvm; 1744 struct nlmsghdr *nlh; 1745 struct sk_buff *skb; 1746 int err = -ENOBUFS; 1747 struct net *net; 1748 u16 flags = 0; 1749 int ifindex; 1750 1751 /* right now notifications are done only with rtnl held */ 1752 ASSERT_RTNL(); 1753 1754 if (p) { 1755 ifindex = p->dev->ifindex; 1756 vg = nbp_vlan_group(p); 1757 net = dev_net(p->dev); 1758 } else { 1759 ifindex = br->dev->ifindex; 1760 vg = br_vlan_group(br); 1761 net = dev_net(br->dev); 1762 } 1763 1764 skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL); 1765 if (!skb) 1766 goto out_err; 1767 1768 err = -EMSGSIZE; 1769 nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0); 1770 if (!nlh) 1771 goto out_err; 1772 bvm = nlmsg_data(nlh); 1773 memset(bvm, 0, sizeof(*bvm)); 1774 bvm->family = AF_BRIDGE; 1775 bvm->ifindex = ifindex; 1776 1777 switch (cmd) { 1778 case RTM_NEWVLAN: 1779 /* need to find the vlan due to flags/options */ 1780 v = br_vlan_find(vg, vid); 1781 if (!v || !br_vlan_should_use(v)) 1782 goto out_kfree; 1783 1784 flags = v->flags; 1785 if (br_get_pvid(vg) == v->vid) 1786 flags |= BRIDGE_VLAN_INFO_PVID; 1787 break; 1788 case RTM_DELVLAN: 1789 break; 1790 default: 1791 goto out_kfree; 1792 } 1793 1794 if (!br_vlan_fill_vids(skb, vid, vid_range, v, flags, false)) 1795 goto out_err; 1796 1797 nlmsg_end(skb, nlh); 1798 rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL); 1799 return; 1800 1801 out_err: 1802 rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err); 1803 out_kfree: 1804 kfree_skb(skb); 1805 } 1806 1807 static int br_vlan_replay_one(struct notifier_block *nb, 1808 struct net_device *dev, 1809 struct switchdev_obj_port_vlan *vlan, 1810 const void *ctx, unsigned long action, 1811 struct netlink_ext_ack *extack) 1812 { 1813 struct switchdev_notifier_port_obj_info obj_info = { 1814 .info = { 1815 .dev = dev, 1816 .extack = extack, 1817 .ctx = ctx, 1818 }, 1819 .obj = &vlan->obj, 1820 }; 1821 int err; 1822 1823 err = nb->notifier_call(nb, action, &obj_info); 1824 return notifier_to_errno(err); 1825 } 1826 1827 int br_vlan_replay(struct net_device *br_dev, struct net_device *dev, 1828 const void *ctx, bool adding, struct notifier_block *nb, 1829 struct netlink_ext_ack *extack) 1830 { 1831 struct net_bridge_vlan_group *vg; 1832 struct net_bridge_vlan *v; 1833 struct net_bridge_port *p; 1834 struct net_bridge *br; 1835 unsigned long action; 1836 int err = 0; 1837 u16 pvid; 1838 1839 ASSERT_RTNL(); 1840 1841 if (!netif_is_bridge_master(br_dev)) 1842 return -EINVAL; 1843 1844 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) 1845 return -EINVAL; 1846 1847 if (netif_is_bridge_master(dev)) { 1848 br = netdev_priv(dev); 1849 vg = br_vlan_group(br); 1850 p = NULL; 1851 } else { 1852 p = br_port_get_rtnl(dev); 1853 if (WARN_ON(!p)) 1854 return -EINVAL; 1855 vg = nbp_vlan_group(p); 1856 br = p->br; 1857 } 1858 1859 if (!vg) 1860 return 0; 1861 1862 if (adding) 1863 action = SWITCHDEV_PORT_OBJ_ADD; 1864 else 1865 action = SWITCHDEV_PORT_OBJ_DEL; 1866 1867 pvid = br_get_pvid(vg); 1868 1869 list_for_each_entry(v, &vg->vlan_list, vlist) { 1870 struct switchdev_obj_port_vlan vlan = { 1871 .obj.orig_dev = dev, 1872 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1873 .flags = br_vlan_flags(v, pvid), 1874 .vid = v->vid, 1875 }; 1876 1877 if (!br_vlan_should_use(v)) 1878 continue; 1879 1880 err = br_vlan_replay_one(nb, dev, &vlan, ctx, action, extack); 1881 if (err) 1882 return err; 1883 } 1884 1885 return err; 1886 } 1887 EXPORT_SYMBOL_GPL(br_vlan_replay); 1888 1889 /* check if v_curr can enter a range ending in range_end */ 1890 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1891 const struct net_bridge_vlan *range_end) 1892 { 1893 return v_curr->vid - range_end->vid == 1 && 1894 range_end->flags == v_curr->flags && 1895 br_vlan_opts_eq_range(v_curr, range_end); 1896 } 1897 1898 static int br_vlan_dump_dev(const struct net_device *dev, 1899 struct sk_buff *skb, 1900 struct netlink_callback *cb, 1901 u32 dump_flags) 1902 { 1903 struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL; 1904 bool dump_stats = !!(dump_flags & BRIDGE_VLANDB_DUMPF_STATS); 1905 struct net_bridge_vlan_group *vg; 1906 int idx = 0, s_idx = cb->args[1]; 1907 struct nlmsghdr *nlh = NULL; 1908 struct net_bridge_port *p; 1909 struct br_vlan_msg *bvm; 1910 struct net_bridge *br; 1911 int err = 0; 1912 u16 pvid; 1913 1914 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) 1915 return -EINVAL; 1916 1917 if (netif_is_bridge_master(dev)) { 1918 br = netdev_priv(dev); 1919 vg = br_vlan_group_rcu(br); 1920 p = NULL; 1921 } else { 1922 p = br_port_get_rcu(dev); 1923 if (WARN_ON(!p)) 1924 return -EINVAL; 1925 vg = nbp_vlan_group_rcu(p); 1926 br = p->br; 1927 } 1928 1929 if (!vg) 1930 return 0; 1931 1932 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 1933 RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI); 1934 if (!nlh) 1935 return -EMSGSIZE; 1936 bvm = nlmsg_data(nlh); 1937 memset(bvm, 0, sizeof(*bvm)); 1938 bvm->family = PF_BRIDGE; 1939 bvm->ifindex = dev->ifindex; 1940 pvid = br_get_pvid(vg); 1941 1942 /* idx must stay at range's beginning until it is filled in */ 1943 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 1944 if (!br_vlan_should_use(v)) 1945 continue; 1946 if (idx < s_idx) { 1947 idx++; 1948 continue; 1949 } 1950 1951 if (!range_start) { 1952 range_start = v; 1953 range_end = v; 1954 continue; 1955 } 1956 1957 if (dump_stats || v->vid == pvid || 1958 !br_vlan_can_enter_range(v, range_end)) { 1959 u16 vlan_flags = br_vlan_flags(range_start, pvid); 1960 1961 if (!br_vlan_fill_vids(skb, range_start->vid, 1962 range_end->vid, range_start, 1963 vlan_flags, dump_stats)) { 1964 err = -EMSGSIZE; 1965 break; 1966 } 1967 /* advance number of filled vlans */ 1968 idx += range_end->vid - range_start->vid + 1; 1969 1970 range_start = v; 1971 } 1972 range_end = v; 1973 } 1974 1975 /* err will be 0 and range_start will be set in 3 cases here: 1976 * - first vlan (range_start == range_end) 1977 * - last vlan (range_start == range_end, not in range) 1978 * - last vlan range (range_start != range_end, in range) 1979 */ 1980 if (!err && range_start && 1981 !br_vlan_fill_vids(skb, range_start->vid, range_end->vid, 1982 range_start, br_vlan_flags(range_start, pvid), 1983 dump_stats)) 1984 err = -EMSGSIZE; 1985 1986 cb->args[1] = err ? idx : 0; 1987 1988 nlmsg_end(skb, nlh); 1989 1990 return err; 1991 } 1992 1993 static const struct nla_policy br_vlan_db_dump_pol[BRIDGE_VLANDB_DUMP_MAX + 1] = { 1994 [BRIDGE_VLANDB_DUMP_FLAGS] = { .type = NLA_U32 }, 1995 }; 1996 1997 static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb) 1998 { 1999 struct nlattr *dtb[BRIDGE_VLANDB_DUMP_MAX + 1]; 2000 int idx = 0, err = 0, s_idx = cb->args[0]; 2001 struct net *net = sock_net(skb->sk); 2002 struct br_vlan_msg *bvm; 2003 struct net_device *dev; 2004 u32 dump_flags = 0; 2005 2006 err = nlmsg_parse(cb->nlh, sizeof(*bvm), dtb, BRIDGE_VLANDB_DUMP_MAX, 2007 br_vlan_db_dump_pol, cb->extack); 2008 if (err < 0) 2009 return err; 2010 2011 bvm = nlmsg_data(cb->nlh); 2012 if (dtb[BRIDGE_VLANDB_DUMP_FLAGS]) 2013 dump_flags = nla_get_u32(dtb[BRIDGE_VLANDB_DUMP_FLAGS]); 2014 2015 rcu_read_lock(); 2016 if (bvm->ifindex) { 2017 dev = dev_get_by_index_rcu(net, bvm->ifindex); 2018 if (!dev) { 2019 err = -ENODEV; 2020 goto out_err; 2021 } 2022 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 2023 if (err && err != -EMSGSIZE) 2024 goto out_err; 2025 } else { 2026 for_each_netdev_rcu(net, dev) { 2027 if (idx < s_idx) 2028 goto skip; 2029 2030 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 2031 if (err == -EMSGSIZE) 2032 break; 2033 skip: 2034 idx++; 2035 } 2036 } 2037 cb->args[0] = idx; 2038 rcu_read_unlock(); 2039 2040 return skb->len; 2041 2042 out_err: 2043 rcu_read_unlock(); 2044 2045 return err; 2046 } 2047 2048 static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = { 2049 [BRIDGE_VLANDB_ENTRY_INFO] = 2050 NLA_POLICY_EXACT_LEN(sizeof(struct bridge_vlan_info)), 2051 [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 }, 2052 [BRIDGE_VLANDB_ENTRY_STATE] = { .type = NLA_U8 }, 2053 [BRIDGE_VLANDB_ENTRY_TUNNEL_INFO] = { .type = NLA_NESTED }, 2054 }; 2055 2056 static int br_vlan_rtm_process_one(struct net_device *dev, 2057 const struct nlattr *attr, 2058 int cmd, struct netlink_ext_ack *extack) 2059 { 2060 struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL; 2061 struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1]; 2062 bool changed = false, skip_processing = false; 2063 struct net_bridge_vlan_group *vg; 2064 struct net_bridge_port *p = NULL; 2065 int err = 0, cmdmap = 0; 2066 struct net_bridge *br; 2067 2068 if (netif_is_bridge_master(dev)) { 2069 br = netdev_priv(dev); 2070 vg = br_vlan_group(br); 2071 } else { 2072 p = br_port_get_rtnl(dev); 2073 if (WARN_ON(!p)) 2074 return -ENODEV; 2075 br = p->br; 2076 vg = nbp_vlan_group(p); 2077 } 2078 2079 if (WARN_ON(!vg)) 2080 return -ENODEV; 2081 2082 err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr, 2083 br_vlan_db_policy, extack); 2084 if (err) 2085 return err; 2086 2087 if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) { 2088 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info"); 2089 return -EINVAL; 2090 } 2091 memset(&vrange_end, 0, sizeof(vrange_end)); 2092 2093 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]); 2094 if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 2095 BRIDGE_VLAN_INFO_RANGE_END)) { 2096 NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls"); 2097 return -EINVAL; 2098 } 2099 if (!br_vlan_valid_id(vinfo->vid, extack)) 2100 return -EINVAL; 2101 2102 if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) { 2103 vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]); 2104 /* validate user-provided flags without RANGE_BEGIN */ 2105 vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags; 2106 vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; 2107 2108 /* vinfo_last is the range start, vinfo the range end */ 2109 vinfo_last = vinfo; 2110 vinfo = &vrange_end; 2111 2112 if (!br_vlan_valid_id(vinfo->vid, extack) || 2113 !br_vlan_valid_range(vinfo, vinfo_last, extack)) 2114 return -EINVAL; 2115 } 2116 2117 switch (cmd) { 2118 case RTM_NEWVLAN: 2119 cmdmap = RTM_SETLINK; 2120 skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS); 2121 break; 2122 case RTM_DELVLAN: 2123 cmdmap = RTM_DELLINK; 2124 break; 2125 } 2126 2127 if (!skip_processing) { 2128 struct bridge_vlan_info *tmp_last = vinfo_last; 2129 2130 /* br_process_vlan_info may overwrite vinfo_last */ 2131 err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last, 2132 &changed, extack); 2133 2134 /* notify first if anything changed */ 2135 if (changed) 2136 br_ifinfo_notify(cmdmap, br, p); 2137 2138 if (err) 2139 return err; 2140 } 2141 2142 /* deal with options */ 2143 if (cmd == RTM_NEWVLAN) { 2144 struct net_bridge_vlan *range_start, *range_end; 2145 2146 if (vinfo_last) { 2147 range_start = br_vlan_find(vg, vinfo_last->vid); 2148 range_end = br_vlan_find(vg, vinfo->vid); 2149 } else { 2150 range_start = br_vlan_find(vg, vinfo->vid); 2151 range_end = range_start; 2152 } 2153 2154 err = br_vlan_process_options(br, p, range_start, range_end, 2155 tb, extack); 2156 } 2157 2158 return err; 2159 } 2160 2161 static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh, 2162 struct netlink_ext_ack *extack) 2163 { 2164 struct net *net = sock_net(skb->sk); 2165 struct br_vlan_msg *bvm; 2166 struct net_device *dev; 2167 struct nlattr *attr; 2168 int err, vlans = 0; 2169 int rem; 2170 2171 /* this should validate the header and check for remaining bytes */ 2172 err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL, 2173 extack); 2174 if (err < 0) 2175 return err; 2176 2177 bvm = nlmsg_data(nlh); 2178 dev = __dev_get_by_index(net, bvm->ifindex); 2179 if (!dev) 2180 return -ENODEV; 2181 2182 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) { 2183 NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port"); 2184 return -EINVAL; 2185 } 2186 2187 nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) { 2188 if (nla_type(attr) != BRIDGE_VLANDB_ENTRY) 2189 continue; 2190 2191 vlans++; 2192 err = br_vlan_rtm_process_one(dev, attr, nlh->nlmsg_type, 2193 extack); 2194 if (err) 2195 break; 2196 } 2197 if (!vlans) { 2198 NL_SET_ERR_MSG_MOD(extack, "No vlans found to process"); 2199 err = -EINVAL; 2200 } 2201 2202 return err; 2203 } 2204 2205 void br_vlan_rtnl_init(void) 2206 { 2207 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL, 2208 br_vlan_rtm_dump, 0); 2209 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN, 2210 br_vlan_rtm_process, NULL, 0); 2211 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN, 2212 br_vlan_rtm_process, NULL, 0); 2213 } 2214 2215 void br_vlan_rtnl_uninit(void) 2216 { 2217 rtnl_unregister(PF_BRIDGE, RTM_GETVLAN); 2218 rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN); 2219 rtnl_unregister(PF_BRIDGE, RTM_DELVLAN); 2220 } 2221