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 br_multicast_toggle_one_vlan(masterv, false); 194 br_multicast_ctx_deinit(&masterv->br_mcast_ctx); 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 err = -ENOMEM; 271 goto out_filt; 272 } 273 v->brvlan = masterv; 274 if (br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)) { 275 v->stats = 276 netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 277 if (!v->stats) { 278 err = -ENOMEM; 279 goto out_filt; 280 } 281 v->priv_flags |= BR_VLFLAG_PER_PORT_STATS; 282 } else { 283 v->stats = masterv->stats; 284 } 285 br_multicast_port_ctx_init(p, v, &v->port_mcast_ctx); 286 } else { 287 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack); 288 if (err && err != -EOPNOTSUPP) 289 goto out; 290 br_multicast_ctx_init(br, v, &v->br_mcast_ctx); 291 v->priv_flags |= BR_VLFLAG_GLOBAL_MCAST_ENABLED; 292 } 293 294 /* Add the dev mac and count the vlan only if it's usable */ 295 if (br_vlan_should_use(v)) { 296 err = br_fdb_insert(br, p, dev->dev_addr, v->vid); 297 if (err) { 298 br_err(br, "failed insert local address into bridge forwarding table\n"); 299 goto out_filt; 300 } 301 vg->num_vlans++; 302 } 303 304 /* set the state before publishing */ 305 v->state = BR_STATE_FORWARDING; 306 307 err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode, 308 br_vlan_rht_params); 309 if (err) 310 goto out_fdb_insert; 311 312 __vlan_add_list(v); 313 __vlan_add_flags(v, flags); 314 br_multicast_toggle_one_vlan(v, true); 315 316 if (p) 317 nbp_vlan_set_vlan_dev_state(p, v->vid); 318 out: 319 return err; 320 321 out_fdb_insert: 322 if (br_vlan_should_use(v)) { 323 br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid); 324 vg->num_vlans--; 325 } 326 327 out_filt: 328 if (p) { 329 __vlan_vid_del(dev, br, v); 330 if (masterv) { 331 if (v->stats && masterv->stats != v->stats) 332 free_percpu(v->stats); 333 v->stats = NULL; 334 335 br_vlan_put_master(masterv); 336 v->brvlan = NULL; 337 } 338 } else { 339 br_switchdev_port_vlan_del(dev, v->vid); 340 } 341 342 goto out; 343 } 344 345 static int __vlan_del(struct net_bridge_vlan *v) 346 { 347 struct net_bridge_vlan *masterv = v; 348 struct net_bridge_vlan_group *vg; 349 struct net_bridge_port *p = NULL; 350 int err = 0; 351 352 if (br_vlan_is_master(v)) { 353 vg = br_vlan_group(v->br); 354 } else { 355 p = v->port; 356 vg = nbp_vlan_group(v->port); 357 masterv = v->brvlan; 358 } 359 360 __vlan_delete_pvid(vg, v->vid); 361 if (p) { 362 err = __vlan_vid_del(p->dev, p->br, v); 363 if (err) 364 goto out; 365 } else { 366 err = br_switchdev_port_vlan_del(v->br->dev, v->vid); 367 if (err && err != -EOPNOTSUPP) 368 goto out; 369 err = 0; 370 } 371 372 if (br_vlan_should_use(v)) { 373 v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY; 374 vg->num_vlans--; 375 } 376 377 if (masterv != v) { 378 vlan_tunnel_info_del(vg, v); 379 rhashtable_remove_fast(&vg->vlan_hash, &v->vnode, 380 br_vlan_rht_params); 381 __vlan_del_list(v); 382 nbp_vlan_set_vlan_dev_state(p, v->vid); 383 br_multicast_toggle_one_vlan(v, false); 384 br_multicast_port_ctx_deinit(&v->port_mcast_ctx); 385 call_rcu(&v->rcu, nbp_vlan_rcu_free); 386 } 387 388 br_vlan_put_master(masterv); 389 out: 390 return err; 391 } 392 393 static void __vlan_group_free(struct net_bridge_vlan_group *vg) 394 { 395 WARN_ON(!list_empty(&vg->vlan_list)); 396 rhashtable_destroy(&vg->vlan_hash); 397 vlan_tunnel_deinit(vg); 398 kfree(vg); 399 } 400 401 static void __vlan_flush(const struct net_bridge *br, 402 const struct net_bridge_port *p, 403 struct net_bridge_vlan_group *vg) 404 { 405 struct net_bridge_vlan *vlan, *tmp; 406 u16 v_start = 0, v_end = 0; 407 408 __vlan_delete_pvid(vg, vg->pvid); 409 list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) { 410 /* take care of disjoint ranges */ 411 if (!v_start) { 412 v_start = vlan->vid; 413 } else if (vlan->vid - v_end != 1) { 414 /* found range end, notify and start next one */ 415 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN); 416 v_start = vlan->vid; 417 } 418 v_end = vlan->vid; 419 420 __vlan_del(vlan); 421 } 422 423 /* notify about the last/whole vlan range */ 424 if (v_start) 425 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN); 426 } 427 428 struct sk_buff *br_handle_vlan(struct net_bridge *br, 429 const struct net_bridge_port *p, 430 struct net_bridge_vlan_group *vg, 431 struct sk_buff *skb) 432 { 433 struct pcpu_sw_netstats *stats; 434 struct net_bridge_vlan *v; 435 u16 vid; 436 437 /* If this packet was not filtered at input, let it pass */ 438 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 439 goto out; 440 441 /* At this point, we know that the frame was filtered and contains 442 * a valid vlan id. If the vlan id has untagged flag set, 443 * send untagged; otherwise, send tagged. 444 */ 445 br_vlan_get_tag(skb, &vid); 446 v = br_vlan_find(vg, vid); 447 /* Vlan entry must be configured at this point. The 448 * only exception is the bridge is set in promisc mode and the 449 * packet is destined for the bridge device. In this case 450 * pass the packet as is. 451 */ 452 if (!v || !br_vlan_should_use(v)) { 453 if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) { 454 goto out; 455 } else { 456 kfree_skb(skb); 457 return NULL; 458 } 459 } 460 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 461 stats = this_cpu_ptr(v->stats); 462 u64_stats_update_begin(&stats->syncp); 463 stats->tx_bytes += skb->len; 464 stats->tx_packets++; 465 u64_stats_update_end(&stats->syncp); 466 } 467 468 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 469 __vlan_hwaccel_clear_tag(skb); 470 471 if (p && (p->flags & BR_VLAN_TUNNEL) && 472 br_handle_egress_vlan_tunnel(skb, v)) { 473 kfree_skb(skb); 474 return NULL; 475 } 476 out: 477 return skb; 478 } 479 480 /* Called under RCU */ 481 static bool __allowed_ingress(const struct net_bridge *br, 482 struct net_bridge_vlan_group *vg, 483 struct sk_buff *skb, u16 *vid, 484 u8 *state, 485 struct net_bridge_vlan **vlan) 486 { 487 struct pcpu_sw_netstats *stats; 488 struct net_bridge_vlan *v; 489 bool tagged; 490 491 BR_INPUT_SKB_CB(skb)->vlan_filtered = true; 492 /* If vlan tx offload is disabled on bridge device and frame was 493 * sent from vlan device on the bridge device, it does not have 494 * HW accelerated vlan tag. 495 */ 496 if (unlikely(!skb_vlan_tag_present(skb) && 497 skb->protocol == br->vlan_proto)) { 498 skb = skb_vlan_untag(skb); 499 if (unlikely(!skb)) 500 return false; 501 } 502 503 if (!br_vlan_get_tag(skb, vid)) { 504 /* Tagged frame */ 505 if (skb->vlan_proto != br->vlan_proto) { 506 /* Protocol-mismatch, empty out vlan_tci for new tag */ 507 skb_push(skb, ETH_HLEN); 508 skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, 509 skb_vlan_tag_get(skb)); 510 if (unlikely(!skb)) 511 return false; 512 513 skb_pull(skb, ETH_HLEN); 514 skb_reset_mac_len(skb); 515 *vid = 0; 516 tagged = false; 517 } else { 518 tagged = true; 519 } 520 } else { 521 /* Untagged frame */ 522 tagged = false; 523 } 524 525 if (!*vid) { 526 u16 pvid = br_get_pvid(vg); 527 528 /* Frame had a tag with VID 0 or did not have a tag. 529 * See if pvid is set on this port. That tells us which 530 * vlan untagged or priority-tagged traffic belongs to. 531 */ 532 if (!pvid) 533 goto drop; 534 535 /* PVID is set on this port. Any untagged or priority-tagged 536 * ingress frame is considered to belong to this vlan. 537 */ 538 *vid = pvid; 539 if (likely(!tagged)) 540 /* Untagged Frame. */ 541 __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid); 542 else 543 /* Priority-tagged Frame. 544 * At this point, we know that skb->vlan_tci VID 545 * field was 0. 546 * We update only VID field and preserve PCP field. 547 */ 548 skb->vlan_tci |= pvid; 549 550 /* if snooping and stats are disabled we can avoid the lookup */ 551 if (!br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && 552 !br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 553 if (*state == BR_STATE_FORWARDING) { 554 *state = br_vlan_get_pvid_state(vg); 555 return br_vlan_state_allowed(*state, true); 556 } else { 557 return true; 558 } 559 } 560 } 561 v = br_vlan_find(vg, *vid); 562 if (!v || !br_vlan_should_use(v)) 563 goto drop; 564 565 if (*state == BR_STATE_FORWARDING) { 566 *state = br_vlan_get_state(v); 567 if (!br_vlan_state_allowed(*state, true)) 568 goto drop; 569 } 570 571 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 572 stats = this_cpu_ptr(v->stats); 573 u64_stats_update_begin(&stats->syncp); 574 stats->rx_bytes += skb->len; 575 stats->rx_packets++; 576 u64_stats_update_end(&stats->syncp); 577 } 578 579 *vlan = v; 580 581 return true; 582 583 drop: 584 kfree_skb(skb); 585 return false; 586 } 587 588 bool br_allowed_ingress(const struct net_bridge *br, 589 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 590 u16 *vid, u8 *state, 591 struct net_bridge_vlan **vlan) 592 { 593 /* If VLAN filtering is disabled on the bridge, all packets are 594 * permitted. 595 */ 596 *vlan = NULL; 597 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) { 598 BR_INPUT_SKB_CB(skb)->vlan_filtered = false; 599 return true; 600 } 601 602 return __allowed_ingress(br, vg, skb, vid, state, vlan); 603 } 604 605 /* Called under RCU. */ 606 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 607 const struct sk_buff *skb) 608 { 609 const struct net_bridge_vlan *v; 610 u16 vid; 611 612 /* If this packet was not filtered at input, let it pass */ 613 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 614 return true; 615 616 br_vlan_get_tag(skb, &vid); 617 v = br_vlan_find(vg, vid); 618 if (v && br_vlan_should_use(v) && 619 br_vlan_state_allowed(br_vlan_get_state(v), false)) 620 return true; 621 622 return false; 623 } 624 625 /* Called under RCU */ 626 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid) 627 { 628 struct net_bridge_vlan_group *vg; 629 struct net_bridge *br = p->br; 630 struct net_bridge_vlan *v; 631 632 /* If filtering was disabled at input, let it pass. */ 633 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 634 return true; 635 636 vg = nbp_vlan_group_rcu(p); 637 if (!vg || !vg->num_vlans) 638 return false; 639 640 if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto) 641 *vid = 0; 642 643 if (!*vid) { 644 *vid = br_get_pvid(vg); 645 if (!*vid || 646 !br_vlan_state_allowed(br_vlan_get_pvid_state(vg), true)) 647 return false; 648 649 return true; 650 } 651 652 v = br_vlan_find(vg, *vid); 653 if (v && br_vlan_state_allowed(br_vlan_get_state(v), true)) 654 return true; 655 656 return false; 657 } 658 659 static int br_vlan_add_existing(struct net_bridge *br, 660 struct net_bridge_vlan_group *vg, 661 struct net_bridge_vlan *vlan, 662 u16 flags, bool *changed, 663 struct netlink_ext_ack *extack) 664 { 665 int err; 666 667 err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack); 668 if (err && err != -EOPNOTSUPP) 669 return err; 670 671 if (!br_vlan_is_brentry(vlan)) { 672 /* Trying to change flags of non-existent bridge vlan */ 673 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) { 674 err = -EINVAL; 675 goto err_flags; 676 } 677 /* It was only kept for port vlans, now make it real */ 678 err = br_fdb_insert(br, NULL, br->dev->dev_addr, 679 vlan->vid); 680 if (err) { 681 br_err(br, "failed to insert local address into bridge forwarding table\n"); 682 goto err_fdb_insert; 683 } 684 685 refcount_inc(&vlan->refcnt); 686 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY; 687 vg->num_vlans++; 688 *changed = true; 689 } 690 691 if (__vlan_add_flags(vlan, flags)) 692 *changed = true; 693 694 return 0; 695 696 err_fdb_insert: 697 err_flags: 698 br_switchdev_port_vlan_del(br->dev, vlan->vid); 699 return err; 700 } 701 702 /* Must be protected by RTNL. 703 * Must be called with vid in range from 1 to 4094 inclusive. 704 * changed must be true only if the vlan was created or updated 705 */ 706 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed, 707 struct netlink_ext_ack *extack) 708 { 709 struct net_bridge_vlan_group *vg; 710 struct net_bridge_vlan *vlan; 711 int ret; 712 713 ASSERT_RTNL(); 714 715 *changed = false; 716 vg = br_vlan_group(br); 717 vlan = br_vlan_find(vg, vid); 718 if (vlan) 719 return br_vlan_add_existing(br, vg, vlan, flags, changed, 720 extack); 721 722 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 723 if (!vlan) 724 return -ENOMEM; 725 726 vlan->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 727 if (!vlan->stats) { 728 kfree(vlan); 729 return -ENOMEM; 730 } 731 vlan->vid = vid; 732 vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER; 733 vlan->flags &= ~BRIDGE_VLAN_INFO_PVID; 734 vlan->br = br; 735 if (flags & BRIDGE_VLAN_INFO_BRENTRY) 736 refcount_set(&vlan->refcnt, 1); 737 ret = __vlan_add(vlan, flags, extack); 738 if (ret) { 739 free_percpu(vlan->stats); 740 kfree(vlan); 741 } else { 742 *changed = true; 743 } 744 745 return ret; 746 } 747 748 /* Must be protected by RTNL. 749 * Must be called with vid in range from 1 to 4094 inclusive. 750 */ 751 int br_vlan_delete(struct net_bridge *br, u16 vid) 752 { 753 struct net_bridge_vlan_group *vg; 754 struct net_bridge_vlan *v; 755 756 ASSERT_RTNL(); 757 758 vg = br_vlan_group(br); 759 v = br_vlan_find(vg, vid); 760 if (!v || !br_vlan_is_brentry(v)) 761 return -ENOENT; 762 763 br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid); 764 br_fdb_delete_by_port(br, NULL, vid, 0); 765 766 vlan_tunnel_info_del(vg, v); 767 768 return __vlan_del(v); 769 } 770 771 void br_vlan_flush(struct net_bridge *br) 772 { 773 struct net_bridge_vlan_group *vg; 774 775 ASSERT_RTNL(); 776 777 vg = br_vlan_group(br); 778 __vlan_flush(br, NULL, vg); 779 RCU_INIT_POINTER(br->vlgrp, NULL); 780 synchronize_rcu(); 781 __vlan_group_free(vg); 782 } 783 784 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid) 785 { 786 if (!vg) 787 return NULL; 788 789 return br_vlan_lookup(&vg->vlan_hash, vid); 790 } 791 792 /* Must be protected by RTNL. */ 793 static void recalculate_group_addr(struct net_bridge *br) 794 { 795 if (br_opt_get(br, BROPT_GROUP_ADDR_SET)) 796 return; 797 798 spin_lock_bh(&br->lock); 799 if (!br_opt_get(br, BROPT_VLAN_ENABLED) || 800 br->vlan_proto == htons(ETH_P_8021Q)) { 801 /* Bridge Group Address */ 802 br->group_addr[5] = 0x00; 803 } else { /* vlan_enabled && ETH_P_8021AD */ 804 /* Provider Bridge Group Address */ 805 br->group_addr[5] = 0x08; 806 } 807 spin_unlock_bh(&br->lock); 808 } 809 810 /* Must be protected by RTNL. */ 811 void br_recalculate_fwd_mask(struct net_bridge *br) 812 { 813 if (!br_opt_get(br, BROPT_VLAN_ENABLED) || 814 br->vlan_proto == htons(ETH_P_8021Q)) 815 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT; 816 else /* vlan_enabled && ETH_P_8021AD */ 817 br->group_fwd_mask_required = BR_GROUPFWD_8021AD & 818 ~(1u << br->group_addr[5]); 819 } 820 821 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 822 struct netlink_ext_ack *extack) 823 { 824 struct switchdev_attr attr = { 825 .orig_dev = br->dev, 826 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 827 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 828 .u.vlan_filtering = val, 829 }; 830 int err; 831 832 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val) 833 return 0; 834 835 err = switchdev_port_attr_set(br->dev, &attr, extack); 836 if (err && err != -EOPNOTSUPP) 837 return err; 838 839 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val); 840 br_manage_promisc(br); 841 recalculate_group_addr(br); 842 br_recalculate_fwd_mask(br); 843 if (!val && br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) { 844 br_info(br, "vlan filtering disabled, automatically disabling multicast vlan snooping\n"); 845 br_multicast_toggle_vlan_snooping(br, false, NULL); 846 } 847 848 return 0; 849 } 850 851 bool br_vlan_enabled(const struct net_device *dev) 852 { 853 struct net_bridge *br = netdev_priv(dev); 854 855 return br_opt_get(br, BROPT_VLAN_ENABLED); 856 } 857 EXPORT_SYMBOL_GPL(br_vlan_enabled); 858 859 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto) 860 { 861 struct net_bridge *br = netdev_priv(dev); 862 863 *p_proto = ntohs(br->vlan_proto); 864 865 return 0; 866 } 867 EXPORT_SYMBOL_GPL(br_vlan_get_proto); 868 869 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 870 struct netlink_ext_ack *extack) 871 { 872 struct switchdev_attr attr = { 873 .orig_dev = br->dev, 874 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL, 875 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 876 .u.vlan_protocol = ntohs(proto), 877 }; 878 int err = 0; 879 struct net_bridge_port *p; 880 struct net_bridge_vlan *vlan; 881 struct net_bridge_vlan_group *vg; 882 __be16 oldproto = br->vlan_proto; 883 884 if (br->vlan_proto == proto) 885 return 0; 886 887 err = switchdev_port_attr_set(br->dev, &attr, extack); 888 if (err && err != -EOPNOTSUPP) 889 return err; 890 891 /* Add VLANs for the new proto to 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 err = vlan_vid_add(p->dev, proto, vlan->vid); 896 if (err) 897 goto err_filt; 898 } 899 } 900 901 br->vlan_proto = proto; 902 903 recalculate_group_addr(br); 904 br_recalculate_fwd_mask(br); 905 906 /* Delete VLANs for the old proto from the device filter. */ 907 list_for_each_entry(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, oldproto, vlan->vid); 911 } 912 913 return 0; 914 915 err_filt: 916 attr.u.vlan_protocol = ntohs(oldproto); 917 switchdev_port_attr_set(br->dev, &attr, NULL); 918 919 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist) 920 vlan_vid_del(p->dev, proto, vlan->vid); 921 922 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 923 vg = nbp_vlan_group(p); 924 list_for_each_entry(vlan, &vg->vlan_list, vlist) 925 vlan_vid_del(p->dev, proto, vlan->vid); 926 } 927 928 return err; 929 } 930 931 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 932 struct netlink_ext_ack *extack) 933 { 934 if (!eth_type_vlan(htons(val))) 935 return -EPROTONOSUPPORT; 936 937 return __br_vlan_set_proto(br, htons(val), extack); 938 } 939 940 int br_vlan_set_stats(struct net_bridge *br, unsigned long val) 941 { 942 switch (val) { 943 case 0: 944 case 1: 945 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val); 946 break; 947 default: 948 return -EINVAL; 949 } 950 951 return 0; 952 } 953 954 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val) 955 { 956 struct net_bridge_port *p; 957 958 /* allow to change the option if there are no port vlans configured */ 959 list_for_each_entry(p, &br->port_list, list) { 960 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 961 962 if (vg->num_vlans) 963 return -EBUSY; 964 } 965 966 switch (val) { 967 case 0: 968 case 1: 969 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val); 970 break; 971 default: 972 return -EINVAL; 973 } 974 975 return 0; 976 } 977 978 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid) 979 { 980 struct net_bridge_vlan *v; 981 982 if (vid != vg->pvid) 983 return false; 984 985 v = br_vlan_lookup(&vg->vlan_hash, vid); 986 if (v && br_vlan_should_use(v) && 987 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 988 return true; 989 990 return false; 991 } 992 993 static void br_vlan_disable_default_pvid(struct net_bridge *br) 994 { 995 struct net_bridge_port *p; 996 u16 pvid = br->default_pvid; 997 998 /* Disable default_pvid on all ports where it is still 999 * configured. 1000 */ 1001 if (vlan_default_pvid(br_vlan_group(br), pvid)) { 1002 if (!br_vlan_delete(br, pvid)) 1003 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); 1004 } 1005 1006 list_for_each_entry(p, &br->port_list, list) { 1007 if (vlan_default_pvid(nbp_vlan_group(p), pvid) && 1008 !nbp_vlan_delete(p, pvid)) 1009 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); 1010 } 1011 1012 br->default_pvid = 0; 1013 } 1014 1015 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1016 struct netlink_ext_ack *extack) 1017 { 1018 const struct net_bridge_vlan *pvent; 1019 struct net_bridge_vlan_group *vg; 1020 struct net_bridge_port *p; 1021 unsigned long *changed; 1022 bool vlchange; 1023 u16 old_pvid; 1024 int err = 0; 1025 1026 if (!pvid) { 1027 br_vlan_disable_default_pvid(br); 1028 return 0; 1029 } 1030 1031 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL); 1032 if (!changed) 1033 return -ENOMEM; 1034 1035 old_pvid = br->default_pvid; 1036 1037 /* Update default_pvid config only if we do not conflict with 1038 * user configuration. 1039 */ 1040 vg = br_vlan_group(br); 1041 pvent = br_vlan_find(vg, pvid); 1042 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) && 1043 (!pvent || !br_vlan_should_use(pvent))) { 1044 err = br_vlan_add(br, pvid, 1045 BRIDGE_VLAN_INFO_PVID | 1046 BRIDGE_VLAN_INFO_UNTAGGED | 1047 BRIDGE_VLAN_INFO_BRENTRY, 1048 &vlchange, extack); 1049 if (err) 1050 goto out; 1051 1052 if (br_vlan_delete(br, old_pvid)) 1053 br_vlan_notify(br, NULL, old_pvid, 0, RTM_DELVLAN); 1054 br_vlan_notify(br, NULL, pvid, 0, RTM_NEWVLAN); 1055 set_bit(0, changed); 1056 } 1057 1058 list_for_each_entry(p, &br->port_list, list) { 1059 /* Update default_pvid config only if we do not conflict with 1060 * user configuration. 1061 */ 1062 vg = nbp_vlan_group(p); 1063 if ((old_pvid && 1064 !vlan_default_pvid(vg, old_pvid)) || 1065 br_vlan_find(vg, pvid)) 1066 continue; 1067 1068 err = nbp_vlan_add(p, pvid, 1069 BRIDGE_VLAN_INFO_PVID | 1070 BRIDGE_VLAN_INFO_UNTAGGED, 1071 &vlchange, extack); 1072 if (err) 1073 goto err_port; 1074 if (nbp_vlan_delete(p, old_pvid)) 1075 br_vlan_notify(br, p, old_pvid, 0, RTM_DELVLAN); 1076 br_vlan_notify(p->br, p, pvid, 0, RTM_NEWVLAN); 1077 set_bit(p->port_no, changed); 1078 } 1079 1080 br->default_pvid = pvid; 1081 1082 out: 1083 bitmap_free(changed); 1084 return err; 1085 1086 err_port: 1087 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 1088 if (!test_bit(p->port_no, changed)) 1089 continue; 1090 1091 if (old_pvid) { 1092 nbp_vlan_add(p, old_pvid, 1093 BRIDGE_VLAN_INFO_PVID | 1094 BRIDGE_VLAN_INFO_UNTAGGED, 1095 &vlchange, NULL); 1096 br_vlan_notify(p->br, p, old_pvid, 0, RTM_NEWVLAN); 1097 } 1098 nbp_vlan_delete(p, pvid); 1099 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); 1100 } 1101 1102 if (test_bit(0, changed)) { 1103 if (old_pvid) { 1104 br_vlan_add(br, old_pvid, 1105 BRIDGE_VLAN_INFO_PVID | 1106 BRIDGE_VLAN_INFO_UNTAGGED | 1107 BRIDGE_VLAN_INFO_BRENTRY, 1108 &vlchange, NULL); 1109 br_vlan_notify(br, NULL, old_pvid, 0, RTM_NEWVLAN); 1110 } 1111 br_vlan_delete(br, pvid); 1112 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); 1113 } 1114 goto out; 1115 } 1116 1117 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1118 struct netlink_ext_ack *extack) 1119 { 1120 u16 pvid = val; 1121 int err = 0; 1122 1123 if (val >= VLAN_VID_MASK) 1124 return -EINVAL; 1125 1126 if (pvid == br->default_pvid) 1127 goto out; 1128 1129 /* Only allow default pvid change when filtering is disabled */ 1130 if (br_opt_get(br, BROPT_VLAN_ENABLED)) { 1131 pr_info_once("Please disable vlan filtering to change default_pvid\n"); 1132 err = -EPERM; 1133 goto out; 1134 } 1135 err = __br_vlan_set_default_pvid(br, pvid, extack); 1136 out: 1137 return err; 1138 } 1139 1140 int br_vlan_init(struct net_bridge *br) 1141 { 1142 struct net_bridge_vlan_group *vg; 1143 int ret = -ENOMEM; 1144 1145 vg = kzalloc(sizeof(*vg), GFP_KERNEL); 1146 if (!vg) 1147 goto out; 1148 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1149 if (ret) 1150 goto err_rhtbl; 1151 ret = vlan_tunnel_init(vg); 1152 if (ret) 1153 goto err_tunnel_init; 1154 INIT_LIST_HEAD(&vg->vlan_list); 1155 br->vlan_proto = htons(ETH_P_8021Q); 1156 br->default_pvid = 1; 1157 rcu_assign_pointer(br->vlgrp, vg); 1158 1159 out: 1160 return ret; 1161 1162 err_tunnel_init: 1163 rhashtable_destroy(&vg->vlan_hash); 1164 err_rhtbl: 1165 kfree(vg); 1166 1167 goto out; 1168 } 1169 1170 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack) 1171 { 1172 struct switchdev_attr attr = { 1173 .orig_dev = p->br->dev, 1174 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 1175 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 1176 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED), 1177 }; 1178 struct net_bridge_vlan_group *vg; 1179 int ret = -ENOMEM; 1180 1181 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); 1182 if (!vg) 1183 goto out; 1184 1185 ret = switchdev_port_attr_set(p->dev, &attr, extack); 1186 if (ret && ret != -EOPNOTSUPP) 1187 goto err_vlan_enabled; 1188 1189 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1190 if (ret) 1191 goto err_rhtbl; 1192 ret = vlan_tunnel_init(vg); 1193 if (ret) 1194 goto err_tunnel_init; 1195 INIT_LIST_HEAD(&vg->vlan_list); 1196 rcu_assign_pointer(p->vlgrp, vg); 1197 if (p->br->default_pvid) { 1198 bool changed; 1199 1200 ret = nbp_vlan_add(p, p->br->default_pvid, 1201 BRIDGE_VLAN_INFO_PVID | 1202 BRIDGE_VLAN_INFO_UNTAGGED, 1203 &changed, extack); 1204 if (ret) 1205 goto err_vlan_add; 1206 br_vlan_notify(p->br, p, p->br->default_pvid, 0, RTM_NEWVLAN); 1207 } 1208 out: 1209 return ret; 1210 1211 err_vlan_add: 1212 RCU_INIT_POINTER(p->vlgrp, NULL); 1213 synchronize_rcu(); 1214 vlan_tunnel_deinit(vg); 1215 err_tunnel_init: 1216 rhashtable_destroy(&vg->vlan_hash); 1217 err_rhtbl: 1218 err_vlan_enabled: 1219 kfree(vg); 1220 1221 goto out; 1222 } 1223 1224 /* Must be protected by RTNL. 1225 * Must be called with vid in range from 1 to 4094 inclusive. 1226 * changed must be true only if the vlan was created or updated 1227 */ 1228 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1229 bool *changed, struct netlink_ext_ack *extack) 1230 { 1231 struct net_bridge_vlan *vlan; 1232 int ret; 1233 1234 ASSERT_RTNL(); 1235 1236 *changed = false; 1237 vlan = br_vlan_find(nbp_vlan_group(port), vid); 1238 if (vlan) { 1239 /* Pass the flags to the hardware bridge */ 1240 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack); 1241 if (ret && ret != -EOPNOTSUPP) 1242 return ret; 1243 *changed = __vlan_add_flags(vlan, flags); 1244 1245 return 0; 1246 } 1247 1248 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 1249 if (!vlan) 1250 return -ENOMEM; 1251 1252 vlan->vid = vid; 1253 vlan->port = port; 1254 ret = __vlan_add(vlan, flags, extack); 1255 if (ret) 1256 kfree(vlan); 1257 else 1258 *changed = true; 1259 1260 return ret; 1261 } 1262 1263 /* Must be protected by RTNL. 1264 * Must be called with vid in range from 1 to 4094 inclusive. 1265 */ 1266 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1267 { 1268 struct net_bridge_vlan *v; 1269 1270 ASSERT_RTNL(); 1271 1272 v = br_vlan_find(nbp_vlan_group(port), vid); 1273 if (!v) 1274 return -ENOENT; 1275 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); 1276 br_fdb_delete_by_port(port->br, port, vid, 0); 1277 1278 return __vlan_del(v); 1279 } 1280 1281 void nbp_vlan_flush(struct net_bridge_port *port) 1282 { 1283 struct net_bridge_vlan_group *vg; 1284 1285 ASSERT_RTNL(); 1286 1287 vg = nbp_vlan_group(port); 1288 __vlan_flush(port->br, port, vg); 1289 RCU_INIT_POINTER(port->vlgrp, NULL); 1290 synchronize_rcu(); 1291 __vlan_group_free(vg); 1292 } 1293 1294 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1295 struct pcpu_sw_netstats *stats) 1296 { 1297 int i; 1298 1299 memset(stats, 0, sizeof(*stats)); 1300 for_each_possible_cpu(i) { 1301 u64 rxpackets, rxbytes, txpackets, txbytes; 1302 struct pcpu_sw_netstats *cpu_stats; 1303 unsigned int start; 1304 1305 cpu_stats = per_cpu_ptr(v->stats, i); 1306 do { 1307 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 1308 rxpackets = cpu_stats->rx_packets; 1309 rxbytes = cpu_stats->rx_bytes; 1310 txbytes = cpu_stats->tx_bytes; 1311 txpackets = cpu_stats->tx_packets; 1312 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 1313 1314 stats->rx_packets += rxpackets; 1315 stats->rx_bytes += rxbytes; 1316 stats->tx_bytes += txbytes; 1317 stats->tx_packets += txpackets; 1318 } 1319 } 1320 1321 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 1322 { 1323 struct net_bridge_vlan_group *vg; 1324 struct net_bridge_port *p; 1325 1326 ASSERT_RTNL(); 1327 p = br_port_get_check_rtnl(dev); 1328 if (p) 1329 vg = nbp_vlan_group(p); 1330 else if (netif_is_bridge_master(dev)) 1331 vg = br_vlan_group(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); 1339 1340 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) 1341 { 1342 struct net_bridge_vlan_group *vg; 1343 struct net_bridge_port *p; 1344 1345 p = br_port_get_check_rcu(dev); 1346 if (p) 1347 vg = nbp_vlan_group_rcu(p); 1348 else if (netif_is_bridge_master(dev)) 1349 vg = br_vlan_group_rcu(netdev_priv(dev)); 1350 else 1351 return -EINVAL; 1352 1353 *p_pvid = br_get_pvid(vg); 1354 return 0; 1355 } 1356 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu); 1357 1358 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1359 struct net_device_path_ctx *ctx, 1360 struct net_device_path *path) 1361 { 1362 struct net_bridge_vlan_group *vg; 1363 int idx = ctx->num_vlans - 1; 1364 u16 vid; 1365 1366 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_KEEP; 1367 1368 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 1369 return; 1370 1371 vg = br_vlan_group(br); 1372 1373 if (idx >= 0 && 1374 ctx->vlan[idx].proto == br->vlan_proto) { 1375 vid = ctx->vlan[idx].id; 1376 } else { 1377 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_TAG; 1378 vid = br_get_pvid(vg); 1379 } 1380 1381 path->bridge.vlan_id = vid; 1382 path->bridge.vlan_proto = br->vlan_proto; 1383 } 1384 1385 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1386 struct net_bridge_port *dst, 1387 struct net_device_path *path) 1388 { 1389 struct net_bridge_vlan_group *vg; 1390 struct net_bridge_vlan *v; 1391 1392 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 1393 return 0; 1394 1395 vg = nbp_vlan_group_rcu(dst); 1396 v = br_vlan_find(vg, path->bridge.vlan_id); 1397 if (!v || !br_vlan_should_use(v)) 1398 return -EINVAL; 1399 1400 if (!(v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 1401 return 0; 1402 1403 if (path->bridge.vlan_mode == DEV_PATH_BR_VLAN_TAG) 1404 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_KEEP; 1405 else if (v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV) 1406 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_UNTAG_HW; 1407 else 1408 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_UNTAG; 1409 1410 return 0; 1411 } 1412 1413 int br_vlan_get_info(const struct net_device *dev, u16 vid, 1414 struct bridge_vlan_info *p_vinfo) 1415 { 1416 struct net_bridge_vlan_group *vg; 1417 struct net_bridge_vlan *v; 1418 struct net_bridge_port *p; 1419 1420 ASSERT_RTNL(); 1421 p = br_port_get_check_rtnl(dev); 1422 if (p) 1423 vg = nbp_vlan_group(p); 1424 else if (netif_is_bridge_master(dev)) 1425 vg = br_vlan_group(netdev_priv(dev)); 1426 else 1427 return -EINVAL; 1428 1429 v = br_vlan_find(vg, vid); 1430 if (!v) 1431 return -ENOENT; 1432 1433 p_vinfo->vid = vid; 1434 p_vinfo->flags = v->flags; 1435 if (vid == br_get_pvid(vg)) 1436 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID; 1437 return 0; 1438 } 1439 EXPORT_SYMBOL_GPL(br_vlan_get_info); 1440 1441 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev) 1442 { 1443 return is_vlan_dev(dev) && 1444 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING); 1445 } 1446 1447 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev, 1448 __always_unused struct netdev_nested_priv *priv) 1449 { 1450 return br_vlan_is_bind_vlan_dev(dev); 1451 } 1452 1453 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev) 1454 { 1455 int found; 1456 1457 rcu_read_lock(); 1458 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn, 1459 NULL); 1460 rcu_read_unlock(); 1461 1462 return !!found; 1463 } 1464 1465 struct br_vlan_bind_walk_data { 1466 u16 vid; 1467 struct net_device *result; 1468 }; 1469 1470 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev, 1471 struct netdev_nested_priv *priv) 1472 { 1473 struct br_vlan_bind_walk_data *data = priv->data; 1474 int found = 0; 1475 1476 if (br_vlan_is_bind_vlan_dev(dev) && 1477 vlan_dev_priv(dev)->vlan_id == data->vid) { 1478 data->result = dev; 1479 found = 1; 1480 } 1481 1482 return found; 1483 } 1484 1485 static struct net_device * 1486 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid) 1487 { 1488 struct br_vlan_bind_walk_data data = { 1489 .vid = vid, 1490 }; 1491 struct netdev_nested_priv priv = { 1492 .data = (void *)&data, 1493 }; 1494 1495 rcu_read_lock(); 1496 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn, 1497 &priv); 1498 rcu_read_unlock(); 1499 1500 return data.result; 1501 } 1502 1503 static bool br_vlan_is_dev_up(const struct net_device *dev) 1504 { 1505 return !!(dev->flags & IFF_UP) && netif_oper_up(dev); 1506 } 1507 1508 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br, 1509 struct net_device *vlan_dev) 1510 { 1511 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id; 1512 struct net_bridge_vlan_group *vg; 1513 struct net_bridge_port *p; 1514 bool has_carrier = false; 1515 1516 if (!netif_carrier_ok(br->dev)) { 1517 netif_carrier_off(vlan_dev); 1518 return; 1519 } 1520 1521 list_for_each_entry(p, &br->port_list, list) { 1522 vg = nbp_vlan_group(p); 1523 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) { 1524 has_carrier = true; 1525 break; 1526 } 1527 } 1528 1529 if (has_carrier) 1530 netif_carrier_on(vlan_dev); 1531 else 1532 netif_carrier_off(vlan_dev); 1533 } 1534 1535 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p) 1536 { 1537 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 1538 struct net_bridge_vlan *vlan; 1539 struct net_device *vlan_dev; 1540 1541 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 1542 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, 1543 vlan->vid); 1544 if (vlan_dev) { 1545 if (br_vlan_is_dev_up(p->dev)) { 1546 if (netif_carrier_ok(p->br->dev)) 1547 netif_carrier_on(vlan_dev); 1548 } else { 1549 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1550 } 1551 } 1552 } 1553 } 1554 1555 static void br_vlan_upper_change(struct net_device *dev, 1556 struct net_device *upper_dev, 1557 bool linking) 1558 { 1559 struct net_bridge *br = netdev_priv(dev); 1560 1561 if (!br_vlan_is_bind_vlan_dev(upper_dev)) 1562 return; 1563 1564 if (linking) { 1565 br_vlan_set_vlan_dev_state(br, upper_dev); 1566 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true); 1567 } else { 1568 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, 1569 br_vlan_has_upper_bind_vlan_dev(dev)); 1570 } 1571 } 1572 1573 struct br_vlan_link_state_walk_data { 1574 struct net_bridge *br; 1575 }; 1576 1577 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev, 1578 struct netdev_nested_priv *priv) 1579 { 1580 struct br_vlan_link_state_walk_data *data = priv->data; 1581 1582 if (br_vlan_is_bind_vlan_dev(vlan_dev)) 1583 br_vlan_set_vlan_dev_state(data->br, vlan_dev); 1584 1585 return 0; 1586 } 1587 1588 static void br_vlan_link_state_change(struct net_device *dev, 1589 struct net_bridge *br) 1590 { 1591 struct br_vlan_link_state_walk_data data = { 1592 .br = br 1593 }; 1594 struct netdev_nested_priv priv = { 1595 .data = (void *)&data, 1596 }; 1597 1598 rcu_read_lock(); 1599 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn, 1600 &priv); 1601 rcu_read_unlock(); 1602 } 1603 1604 /* Must be protected by RTNL. */ 1605 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid) 1606 { 1607 struct net_device *vlan_dev; 1608 1609 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1610 return; 1611 1612 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid); 1613 if (vlan_dev) 1614 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1615 } 1616 1617 /* Must be protected by RTNL. */ 1618 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr) 1619 { 1620 struct netdev_notifier_changeupper_info *info; 1621 struct net_bridge *br = netdev_priv(dev); 1622 int vlcmd = 0, ret = 0; 1623 bool changed = false; 1624 1625 switch (event) { 1626 case NETDEV_REGISTER: 1627 ret = br_vlan_add(br, br->default_pvid, 1628 BRIDGE_VLAN_INFO_PVID | 1629 BRIDGE_VLAN_INFO_UNTAGGED | 1630 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL); 1631 vlcmd = RTM_NEWVLAN; 1632 break; 1633 case NETDEV_UNREGISTER: 1634 changed = !br_vlan_delete(br, br->default_pvid); 1635 vlcmd = RTM_DELVLAN; 1636 break; 1637 case NETDEV_CHANGEUPPER: 1638 info = ptr; 1639 br_vlan_upper_change(dev, info->upper_dev, info->linking); 1640 break; 1641 1642 case NETDEV_CHANGE: 1643 case NETDEV_UP: 1644 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING)) 1645 break; 1646 br_vlan_link_state_change(dev, br); 1647 break; 1648 } 1649 if (changed) 1650 br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd); 1651 1652 return ret; 1653 } 1654 1655 /* Must be protected by RTNL. */ 1656 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event) 1657 { 1658 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1659 return; 1660 1661 switch (event) { 1662 case NETDEV_CHANGE: 1663 case NETDEV_DOWN: 1664 case NETDEV_UP: 1665 br_vlan_set_all_vlan_dev_state(p); 1666 break; 1667 } 1668 } 1669 1670 static bool br_vlan_stats_fill(struct sk_buff *skb, 1671 const struct net_bridge_vlan *v) 1672 { 1673 struct pcpu_sw_netstats stats; 1674 struct nlattr *nest; 1675 1676 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_STATS); 1677 if (!nest) 1678 return false; 1679 1680 br_vlan_get_stats(v, &stats); 1681 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES, stats.rx_bytes, 1682 BRIDGE_VLANDB_STATS_PAD) || 1683 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_PACKETS, 1684 stats.rx_packets, BRIDGE_VLANDB_STATS_PAD) || 1685 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES, stats.tx_bytes, 1686 BRIDGE_VLANDB_STATS_PAD) || 1687 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_PACKETS, 1688 stats.tx_packets, BRIDGE_VLANDB_STATS_PAD)) 1689 goto out_err; 1690 1691 nla_nest_end(skb, nest); 1692 1693 return true; 1694 1695 out_err: 1696 nla_nest_cancel(skb, nest); 1697 return false; 1698 } 1699 1700 /* v_opts is used to dump the options which must be equal in the whole range */ 1701 static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range, 1702 const struct net_bridge_vlan *v_opts, 1703 u16 flags, 1704 bool dump_stats) 1705 { 1706 struct bridge_vlan_info info; 1707 struct nlattr *nest; 1708 1709 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY); 1710 if (!nest) 1711 return false; 1712 1713 memset(&info, 0, sizeof(info)); 1714 info.vid = vid; 1715 if (flags & BRIDGE_VLAN_INFO_UNTAGGED) 1716 info.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 1717 if (flags & BRIDGE_VLAN_INFO_PVID) 1718 info.flags |= BRIDGE_VLAN_INFO_PVID; 1719 1720 if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info)) 1721 goto out_err; 1722 1723 if (vid_range && vid < vid_range && 1724 !(flags & BRIDGE_VLAN_INFO_PVID) && 1725 nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range)) 1726 goto out_err; 1727 1728 if (v_opts) { 1729 if (!br_vlan_opts_fill(skb, v_opts)) 1730 goto out_err; 1731 1732 if (dump_stats && !br_vlan_stats_fill(skb, v_opts)) 1733 goto out_err; 1734 } 1735 1736 nla_nest_end(skb, nest); 1737 1738 return true; 1739 1740 out_err: 1741 nla_nest_cancel(skb, nest); 1742 return false; 1743 } 1744 1745 static size_t rtnl_vlan_nlmsg_size(void) 1746 { 1747 return NLMSG_ALIGN(sizeof(struct br_vlan_msg)) 1748 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */ 1749 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */ 1750 + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */ 1751 + br_vlan_opts_nl_size(); /* bridge vlan options */ 1752 } 1753 1754 void br_vlan_notify(const struct net_bridge *br, 1755 const struct net_bridge_port *p, 1756 u16 vid, u16 vid_range, 1757 int cmd) 1758 { 1759 struct net_bridge_vlan_group *vg; 1760 struct net_bridge_vlan *v = NULL; 1761 struct br_vlan_msg *bvm; 1762 struct nlmsghdr *nlh; 1763 struct sk_buff *skb; 1764 int err = -ENOBUFS; 1765 struct net *net; 1766 u16 flags = 0; 1767 int ifindex; 1768 1769 /* right now notifications are done only with rtnl held */ 1770 ASSERT_RTNL(); 1771 1772 if (p) { 1773 ifindex = p->dev->ifindex; 1774 vg = nbp_vlan_group(p); 1775 net = dev_net(p->dev); 1776 } else { 1777 ifindex = br->dev->ifindex; 1778 vg = br_vlan_group(br); 1779 net = dev_net(br->dev); 1780 } 1781 1782 skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL); 1783 if (!skb) 1784 goto out_err; 1785 1786 err = -EMSGSIZE; 1787 nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0); 1788 if (!nlh) 1789 goto out_err; 1790 bvm = nlmsg_data(nlh); 1791 memset(bvm, 0, sizeof(*bvm)); 1792 bvm->family = AF_BRIDGE; 1793 bvm->ifindex = ifindex; 1794 1795 switch (cmd) { 1796 case RTM_NEWVLAN: 1797 /* need to find the vlan due to flags/options */ 1798 v = br_vlan_find(vg, vid); 1799 if (!v || !br_vlan_should_use(v)) 1800 goto out_kfree; 1801 1802 flags = v->flags; 1803 if (br_get_pvid(vg) == v->vid) 1804 flags |= BRIDGE_VLAN_INFO_PVID; 1805 break; 1806 case RTM_DELVLAN: 1807 break; 1808 default: 1809 goto out_kfree; 1810 } 1811 1812 if (!br_vlan_fill_vids(skb, vid, vid_range, v, flags, false)) 1813 goto out_err; 1814 1815 nlmsg_end(skb, nlh); 1816 rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL); 1817 return; 1818 1819 out_err: 1820 rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err); 1821 out_kfree: 1822 kfree_skb(skb); 1823 } 1824 1825 static int br_vlan_replay_one(struct notifier_block *nb, 1826 struct net_device *dev, 1827 struct switchdev_obj_port_vlan *vlan, 1828 const void *ctx, unsigned long action, 1829 struct netlink_ext_ack *extack) 1830 { 1831 struct switchdev_notifier_port_obj_info obj_info = { 1832 .info = { 1833 .dev = dev, 1834 .extack = extack, 1835 .ctx = ctx, 1836 }, 1837 .obj = &vlan->obj, 1838 }; 1839 int err; 1840 1841 err = nb->notifier_call(nb, action, &obj_info); 1842 return notifier_to_errno(err); 1843 } 1844 1845 int br_vlan_replay(struct net_device *br_dev, struct net_device *dev, 1846 const void *ctx, bool adding, struct notifier_block *nb, 1847 struct netlink_ext_ack *extack) 1848 { 1849 struct net_bridge_vlan_group *vg; 1850 struct net_bridge_vlan *v; 1851 struct net_bridge_port *p; 1852 struct net_bridge *br; 1853 unsigned long action; 1854 int err = 0; 1855 u16 pvid; 1856 1857 ASSERT_RTNL(); 1858 1859 if (!netif_is_bridge_master(br_dev)) 1860 return -EINVAL; 1861 1862 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) 1863 return -EINVAL; 1864 1865 if (netif_is_bridge_master(dev)) { 1866 br = netdev_priv(dev); 1867 vg = br_vlan_group(br); 1868 p = NULL; 1869 } else { 1870 p = br_port_get_rtnl(dev); 1871 if (WARN_ON(!p)) 1872 return -EINVAL; 1873 vg = nbp_vlan_group(p); 1874 br = p->br; 1875 } 1876 1877 if (!vg) 1878 return 0; 1879 1880 if (adding) 1881 action = SWITCHDEV_PORT_OBJ_ADD; 1882 else 1883 action = SWITCHDEV_PORT_OBJ_DEL; 1884 1885 pvid = br_get_pvid(vg); 1886 1887 list_for_each_entry(v, &vg->vlan_list, vlist) { 1888 struct switchdev_obj_port_vlan vlan = { 1889 .obj.orig_dev = dev, 1890 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1891 .flags = br_vlan_flags(v, pvid), 1892 .vid = v->vid, 1893 }; 1894 1895 if (!br_vlan_should_use(v)) 1896 continue; 1897 1898 err = br_vlan_replay_one(nb, dev, &vlan, ctx, action, extack); 1899 if (err) 1900 return err; 1901 } 1902 1903 return err; 1904 } 1905 EXPORT_SYMBOL_GPL(br_vlan_replay); 1906 1907 /* check if v_curr can enter a range ending in range_end */ 1908 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1909 const struct net_bridge_vlan *range_end) 1910 { 1911 return v_curr->vid - range_end->vid == 1 && 1912 range_end->flags == v_curr->flags && 1913 br_vlan_opts_eq_range(v_curr, range_end); 1914 } 1915 1916 static int br_vlan_dump_dev(const struct net_device *dev, 1917 struct sk_buff *skb, 1918 struct netlink_callback *cb, 1919 u32 dump_flags) 1920 { 1921 struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL; 1922 bool dump_stats = !!(dump_flags & BRIDGE_VLANDB_DUMPF_STATS); 1923 struct net_bridge_vlan_group *vg; 1924 int idx = 0, s_idx = cb->args[1]; 1925 struct nlmsghdr *nlh = NULL; 1926 struct net_bridge_port *p; 1927 struct br_vlan_msg *bvm; 1928 struct net_bridge *br; 1929 int err = 0; 1930 u16 pvid; 1931 1932 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) 1933 return -EINVAL; 1934 1935 if (netif_is_bridge_master(dev)) { 1936 br = netdev_priv(dev); 1937 vg = br_vlan_group_rcu(br); 1938 p = NULL; 1939 } else { 1940 p = br_port_get_rcu(dev); 1941 if (WARN_ON(!p)) 1942 return -EINVAL; 1943 vg = nbp_vlan_group_rcu(p); 1944 br = p->br; 1945 } 1946 1947 if (!vg) 1948 return 0; 1949 1950 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 1951 RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI); 1952 if (!nlh) 1953 return -EMSGSIZE; 1954 bvm = nlmsg_data(nlh); 1955 memset(bvm, 0, sizeof(*bvm)); 1956 bvm->family = PF_BRIDGE; 1957 bvm->ifindex = dev->ifindex; 1958 pvid = br_get_pvid(vg); 1959 1960 /* idx must stay at range's beginning until it is filled in */ 1961 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 1962 if (!br_vlan_should_use(v)) 1963 continue; 1964 if (idx < s_idx) { 1965 idx++; 1966 continue; 1967 } 1968 1969 if (!range_start) { 1970 range_start = v; 1971 range_end = v; 1972 continue; 1973 } 1974 1975 if (dump_stats || v->vid == pvid || 1976 !br_vlan_can_enter_range(v, range_end)) { 1977 u16 vlan_flags = br_vlan_flags(range_start, pvid); 1978 1979 if (!br_vlan_fill_vids(skb, range_start->vid, 1980 range_end->vid, range_start, 1981 vlan_flags, dump_stats)) { 1982 err = -EMSGSIZE; 1983 break; 1984 } 1985 /* advance number of filled vlans */ 1986 idx += range_end->vid - range_start->vid + 1; 1987 1988 range_start = v; 1989 } 1990 range_end = v; 1991 } 1992 1993 /* err will be 0 and range_start will be set in 3 cases here: 1994 * - first vlan (range_start == range_end) 1995 * - last vlan (range_start == range_end, not in range) 1996 * - last vlan range (range_start != range_end, in range) 1997 */ 1998 if (!err && range_start && 1999 !br_vlan_fill_vids(skb, range_start->vid, range_end->vid, 2000 range_start, br_vlan_flags(range_start, pvid), 2001 dump_stats)) 2002 err = -EMSGSIZE; 2003 2004 cb->args[1] = err ? idx : 0; 2005 2006 nlmsg_end(skb, nlh); 2007 2008 return err; 2009 } 2010 2011 static const struct nla_policy br_vlan_db_dump_pol[BRIDGE_VLANDB_DUMP_MAX + 1] = { 2012 [BRIDGE_VLANDB_DUMP_FLAGS] = { .type = NLA_U32 }, 2013 }; 2014 2015 static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb) 2016 { 2017 struct nlattr *dtb[BRIDGE_VLANDB_DUMP_MAX + 1]; 2018 int idx = 0, err = 0, s_idx = cb->args[0]; 2019 struct net *net = sock_net(skb->sk); 2020 struct br_vlan_msg *bvm; 2021 struct net_device *dev; 2022 u32 dump_flags = 0; 2023 2024 err = nlmsg_parse(cb->nlh, sizeof(*bvm), dtb, BRIDGE_VLANDB_DUMP_MAX, 2025 br_vlan_db_dump_pol, cb->extack); 2026 if (err < 0) 2027 return err; 2028 2029 bvm = nlmsg_data(cb->nlh); 2030 if (dtb[BRIDGE_VLANDB_DUMP_FLAGS]) 2031 dump_flags = nla_get_u32(dtb[BRIDGE_VLANDB_DUMP_FLAGS]); 2032 2033 rcu_read_lock(); 2034 if (bvm->ifindex) { 2035 dev = dev_get_by_index_rcu(net, bvm->ifindex); 2036 if (!dev) { 2037 err = -ENODEV; 2038 goto out_err; 2039 } 2040 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 2041 if (err && err != -EMSGSIZE) 2042 goto out_err; 2043 } else { 2044 for_each_netdev_rcu(net, dev) { 2045 if (idx < s_idx) 2046 goto skip; 2047 2048 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 2049 if (err == -EMSGSIZE) 2050 break; 2051 skip: 2052 idx++; 2053 } 2054 } 2055 cb->args[0] = idx; 2056 rcu_read_unlock(); 2057 2058 return skb->len; 2059 2060 out_err: 2061 rcu_read_unlock(); 2062 2063 return err; 2064 } 2065 2066 static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = { 2067 [BRIDGE_VLANDB_ENTRY_INFO] = 2068 NLA_POLICY_EXACT_LEN(sizeof(struct bridge_vlan_info)), 2069 [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 }, 2070 [BRIDGE_VLANDB_ENTRY_STATE] = { .type = NLA_U8 }, 2071 [BRIDGE_VLANDB_ENTRY_TUNNEL_INFO] = { .type = NLA_NESTED }, 2072 }; 2073 2074 static int br_vlan_rtm_process_one(struct net_device *dev, 2075 const struct nlattr *attr, 2076 int cmd, struct netlink_ext_ack *extack) 2077 { 2078 struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL; 2079 struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1]; 2080 bool changed = false, skip_processing = false; 2081 struct net_bridge_vlan_group *vg; 2082 struct net_bridge_port *p = NULL; 2083 int err = 0, cmdmap = 0; 2084 struct net_bridge *br; 2085 2086 if (netif_is_bridge_master(dev)) { 2087 br = netdev_priv(dev); 2088 vg = br_vlan_group(br); 2089 } else { 2090 p = br_port_get_rtnl(dev); 2091 if (WARN_ON(!p)) 2092 return -ENODEV; 2093 br = p->br; 2094 vg = nbp_vlan_group(p); 2095 } 2096 2097 if (WARN_ON(!vg)) 2098 return -ENODEV; 2099 2100 err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr, 2101 br_vlan_db_policy, extack); 2102 if (err) 2103 return err; 2104 2105 if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) { 2106 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info"); 2107 return -EINVAL; 2108 } 2109 memset(&vrange_end, 0, sizeof(vrange_end)); 2110 2111 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]); 2112 if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 2113 BRIDGE_VLAN_INFO_RANGE_END)) { 2114 NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls"); 2115 return -EINVAL; 2116 } 2117 if (!br_vlan_valid_id(vinfo->vid, extack)) 2118 return -EINVAL; 2119 2120 if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) { 2121 vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]); 2122 /* validate user-provided flags without RANGE_BEGIN */ 2123 vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags; 2124 vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; 2125 2126 /* vinfo_last is the range start, vinfo the range end */ 2127 vinfo_last = vinfo; 2128 vinfo = &vrange_end; 2129 2130 if (!br_vlan_valid_id(vinfo->vid, extack) || 2131 !br_vlan_valid_range(vinfo, vinfo_last, extack)) 2132 return -EINVAL; 2133 } 2134 2135 switch (cmd) { 2136 case RTM_NEWVLAN: 2137 cmdmap = RTM_SETLINK; 2138 skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS); 2139 break; 2140 case RTM_DELVLAN: 2141 cmdmap = RTM_DELLINK; 2142 break; 2143 } 2144 2145 if (!skip_processing) { 2146 struct bridge_vlan_info *tmp_last = vinfo_last; 2147 2148 /* br_process_vlan_info may overwrite vinfo_last */ 2149 err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last, 2150 &changed, extack); 2151 2152 /* notify first if anything changed */ 2153 if (changed) 2154 br_ifinfo_notify(cmdmap, br, p); 2155 2156 if (err) 2157 return err; 2158 } 2159 2160 /* deal with options */ 2161 if (cmd == RTM_NEWVLAN) { 2162 struct net_bridge_vlan *range_start, *range_end; 2163 2164 if (vinfo_last) { 2165 range_start = br_vlan_find(vg, vinfo_last->vid); 2166 range_end = br_vlan_find(vg, vinfo->vid); 2167 } else { 2168 range_start = br_vlan_find(vg, vinfo->vid); 2169 range_end = range_start; 2170 } 2171 2172 err = br_vlan_process_options(br, p, range_start, range_end, 2173 tb, extack); 2174 } 2175 2176 return err; 2177 } 2178 2179 static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh, 2180 struct netlink_ext_ack *extack) 2181 { 2182 struct net *net = sock_net(skb->sk); 2183 struct br_vlan_msg *bvm; 2184 struct net_device *dev; 2185 struct nlattr *attr; 2186 int err, vlans = 0; 2187 int rem; 2188 2189 /* this should validate the header and check for remaining bytes */ 2190 err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL, 2191 extack); 2192 if (err < 0) 2193 return err; 2194 2195 bvm = nlmsg_data(nlh); 2196 dev = __dev_get_by_index(net, bvm->ifindex); 2197 if (!dev) 2198 return -ENODEV; 2199 2200 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) { 2201 NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port"); 2202 return -EINVAL; 2203 } 2204 2205 nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) { 2206 switch (nla_type(attr)) { 2207 case BRIDGE_VLANDB_ENTRY: 2208 err = br_vlan_rtm_process_one(dev, attr, 2209 nlh->nlmsg_type, 2210 extack); 2211 break; 2212 case BRIDGE_VLANDB_GLOBAL_OPTIONS: 2213 err = br_vlan_rtm_process_global_options(dev, attr, 2214 nlh->nlmsg_type, 2215 extack); 2216 break; 2217 default: 2218 continue; 2219 } 2220 2221 vlans++; 2222 if (err) 2223 break; 2224 } 2225 if (!vlans) { 2226 NL_SET_ERR_MSG_MOD(extack, "No vlans found to process"); 2227 err = -EINVAL; 2228 } 2229 2230 return err; 2231 } 2232 2233 void br_vlan_rtnl_init(void) 2234 { 2235 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL, 2236 br_vlan_rtm_dump, 0); 2237 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN, 2238 br_vlan_rtm_process, NULL, 0); 2239 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN, 2240 br_vlan_rtm_process, NULL, 0); 2241 } 2242 2243 void br_vlan_rtnl_uninit(void) 2244 { 2245 rtnl_unregister(PF_BRIDGE, RTM_GETVLAN); 2246 rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN); 2247 rtnl_unregister(PF_BRIDGE, RTM_DELVLAN); 2248 } 2249