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 the skb will be sent using forwarding offload, the assumption is 469 * that the switchdev will inject the packet into hardware together 470 * with the bridge VLAN, so that it can be forwarded according to that 471 * VLAN. The switchdev should deal with popping the VLAN header in 472 * hardware on each egress port as appropriate. So only strip the VLAN 473 * header if forwarding offload is not being used. 474 */ 475 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED && 476 !br_switchdev_frame_uses_tx_fwd_offload(skb)) 477 __vlan_hwaccel_clear_tag(skb); 478 479 if (p && (p->flags & BR_VLAN_TUNNEL) && 480 br_handle_egress_vlan_tunnel(skb, v)) { 481 kfree_skb(skb); 482 return NULL; 483 } 484 out: 485 return skb; 486 } 487 488 /* Called under RCU */ 489 static bool __allowed_ingress(const struct net_bridge *br, 490 struct net_bridge_vlan_group *vg, 491 struct sk_buff *skb, u16 *vid, 492 u8 *state, 493 struct net_bridge_vlan **vlan) 494 { 495 struct pcpu_sw_netstats *stats; 496 struct net_bridge_vlan *v; 497 bool tagged; 498 499 BR_INPUT_SKB_CB(skb)->vlan_filtered = true; 500 /* If vlan tx offload is disabled on bridge device and frame was 501 * sent from vlan device on the bridge device, it does not have 502 * HW accelerated vlan tag. 503 */ 504 if (unlikely(!skb_vlan_tag_present(skb) && 505 skb->protocol == br->vlan_proto)) { 506 skb = skb_vlan_untag(skb); 507 if (unlikely(!skb)) 508 return false; 509 } 510 511 if (!br_vlan_get_tag(skb, vid)) { 512 /* Tagged frame */ 513 if (skb->vlan_proto != br->vlan_proto) { 514 /* Protocol-mismatch, empty out vlan_tci for new tag */ 515 skb_push(skb, ETH_HLEN); 516 skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, 517 skb_vlan_tag_get(skb)); 518 if (unlikely(!skb)) 519 return false; 520 521 skb_pull(skb, ETH_HLEN); 522 skb_reset_mac_len(skb); 523 *vid = 0; 524 tagged = false; 525 } else { 526 tagged = true; 527 } 528 } else { 529 /* Untagged frame */ 530 tagged = false; 531 } 532 533 if (!*vid) { 534 u16 pvid = br_get_pvid(vg); 535 536 /* Frame had a tag with VID 0 or did not have a tag. 537 * See if pvid is set on this port. That tells us which 538 * vlan untagged or priority-tagged traffic belongs to. 539 */ 540 if (!pvid) 541 goto drop; 542 543 /* PVID is set on this port. Any untagged or priority-tagged 544 * ingress frame is considered to belong to this vlan. 545 */ 546 *vid = pvid; 547 if (likely(!tagged)) 548 /* Untagged Frame. */ 549 __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid); 550 else 551 /* Priority-tagged Frame. 552 * At this point, we know that skb->vlan_tci VID 553 * field was 0. 554 * We update only VID field and preserve PCP field. 555 */ 556 skb->vlan_tci |= pvid; 557 558 /* if snooping and stats are disabled we can avoid the lookup */ 559 if (!br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && 560 !br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 561 if (*state == BR_STATE_FORWARDING) { 562 *state = br_vlan_get_pvid_state(vg); 563 return br_vlan_state_allowed(*state, true); 564 } else { 565 return true; 566 } 567 } 568 } 569 v = br_vlan_find(vg, *vid); 570 if (!v || !br_vlan_should_use(v)) 571 goto drop; 572 573 if (*state == BR_STATE_FORWARDING) { 574 *state = br_vlan_get_state(v); 575 if (!br_vlan_state_allowed(*state, true)) 576 goto drop; 577 } 578 579 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 580 stats = this_cpu_ptr(v->stats); 581 u64_stats_update_begin(&stats->syncp); 582 stats->rx_bytes += skb->len; 583 stats->rx_packets++; 584 u64_stats_update_end(&stats->syncp); 585 } 586 587 *vlan = v; 588 589 return true; 590 591 drop: 592 kfree_skb(skb); 593 return false; 594 } 595 596 bool br_allowed_ingress(const struct net_bridge *br, 597 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 598 u16 *vid, u8 *state, 599 struct net_bridge_vlan **vlan) 600 { 601 /* If VLAN filtering is disabled on the bridge, all packets are 602 * permitted. 603 */ 604 *vlan = NULL; 605 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) { 606 BR_INPUT_SKB_CB(skb)->vlan_filtered = false; 607 return true; 608 } 609 610 return __allowed_ingress(br, vg, skb, vid, state, vlan); 611 } 612 613 /* Called under RCU. */ 614 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 615 const struct sk_buff *skb) 616 { 617 const struct net_bridge_vlan *v; 618 u16 vid; 619 620 /* If this packet was not filtered at input, let it pass */ 621 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 622 return true; 623 624 br_vlan_get_tag(skb, &vid); 625 v = br_vlan_find(vg, vid); 626 if (v && br_vlan_should_use(v) && 627 br_vlan_state_allowed(br_vlan_get_state(v), false)) 628 return true; 629 630 return false; 631 } 632 633 /* Called under RCU */ 634 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid) 635 { 636 struct net_bridge_vlan_group *vg; 637 struct net_bridge *br = p->br; 638 struct net_bridge_vlan *v; 639 640 /* If filtering was disabled at input, let it pass. */ 641 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 642 return true; 643 644 vg = nbp_vlan_group_rcu(p); 645 if (!vg || !vg->num_vlans) 646 return false; 647 648 if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto) 649 *vid = 0; 650 651 if (!*vid) { 652 *vid = br_get_pvid(vg); 653 if (!*vid || 654 !br_vlan_state_allowed(br_vlan_get_pvid_state(vg), true)) 655 return false; 656 657 return true; 658 } 659 660 v = br_vlan_find(vg, *vid); 661 if (v && br_vlan_state_allowed(br_vlan_get_state(v), true)) 662 return true; 663 664 return false; 665 } 666 667 static int br_vlan_add_existing(struct net_bridge *br, 668 struct net_bridge_vlan_group *vg, 669 struct net_bridge_vlan *vlan, 670 u16 flags, bool *changed, 671 struct netlink_ext_ack *extack) 672 { 673 int err; 674 675 err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack); 676 if (err && err != -EOPNOTSUPP) 677 return err; 678 679 if (!br_vlan_is_brentry(vlan)) { 680 /* Trying to change flags of non-existent bridge vlan */ 681 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) { 682 err = -EINVAL; 683 goto err_flags; 684 } 685 /* It was only kept for port vlans, now make it real */ 686 err = br_fdb_insert(br, NULL, br->dev->dev_addr, 687 vlan->vid); 688 if (err) { 689 br_err(br, "failed to insert local address into bridge forwarding table\n"); 690 goto err_fdb_insert; 691 } 692 693 refcount_inc(&vlan->refcnt); 694 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY; 695 vg->num_vlans++; 696 *changed = true; 697 br_multicast_toggle_one_vlan(vlan, true); 698 } 699 700 if (__vlan_add_flags(vlan, flags)) 701 *changed = true; 702 703 return 0; 704 705 err_fdb_insert: 706 err_flags: 707 br_switchdev_port_vlan_del(br->dev, vlan->vid); 708 return err; 709 } 710 711 /* Must be protected by RTNL. 712 * Must be called with vid in range from 1 to 4094 inclusive. 713 * changed must be true only if the vlan was created or updated 714 */ 715 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed, 716 struct netlink_ext_ack *extack) 717 { 718 struct net_bridge_vlan_group *vg; 719 struct net_bridge_vlan *vlan; 720 int ret; 721 722 ASSERT_RTNL(); 723 724 *changed = false; 725 vg = br_vlan_group(br); 726 vlan = br_vlan_find(vg, vid); 727 if (vlan) 728 return br_vlan_add_existing(br, vg, vlan, flags, changed, 729 extack); 730 731 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 732 if (!vlan) 733 return -ENOMEM; 734 735 vlan->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 736 if (!vlan->stats) { 737 kfree(vlan); 738 return -ENOMEM; 739 } 740 vlan->vid = vid; 741 vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER; 742 vlan->flags &= ~BRIDGE_VLAN_INFO_PVID; 743 vlan->br = br; 744 if (flags & BRIDGE_VLAN_INFO_BRENTRY) 745 refcount_set(&vlan->refcnt, 1); 746 ret = __vlan_add(vlan, flags, extack); 747 if (ret) { 748 free_percpu(vlan->stats); 749 kfree(vlan); 750 } else { 751 *changed = true; 752 } 753 754 return ret; 755 } 756 757 /* Must be protected by RTNL. 758 * Must be called with vid in range from 1 to 4094 inclusive. 759 */ 760 int br_vlan_delete(struct net_bridge *br, u16 vid) 761 { 762 struct net_bridge_vlan_group *vg; 763 struct net_bridge_vlan *v; 764 765 ASSERT_RTNL(); 766 767 vg = br_vlan_group(br); 768 v = br_vlan_find(vg, vid); 769 if (!v || !br_vlan_is_brentry(v)) 770 return -ENOENT; 771 772 br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid); 773 br_fdb_delete_by_port(br, NULL, vid, 0); 774 775 vlan_tunnel_info_del(vg, v); 776 777 return __vlan_del(v); 778 } 779 780 void br_vlan_flush(struct net_bridge *br) 781 { 782 struct net_bridge_vlan_group *vg; 783 784 ASSERT_RTNL(); 785 786 vg = br_vlan_group(br); 787 __vlan_flush(br, NULL, vg); 788 RCU_INIT_POINTER(br->vlgrp, NULL); 789 synchronize_rcu(); 790 __vlan_group_free(vg); 791 } 792 793 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid) 794 { 795 if (!vg) 796 return NULL; 797 798 return br_vlan_lookup(&vg->vlan_hash, vid); 799 } 800 801 /* Must be protected by RTNL. */ 802 static void recalculate_group_addr(struct net_bridge *br) 803 { 804 if (br_opt_get(br, BROPT_GROUP_ADDR_SET)) 805 return; 806 807 spin_lock_bh(&br->lock); 808 if (!br_opt_get(br, BROPT_VLAN_ENABLED) || 809 br->vlan_proto == htons(ETH_P_8021Q)) { 810 /* Bridge Group Address */ 811 br->group_addr[5] = 0x00; 812 } else { /* vlan_enabled && ETH_P_8021AD */ 813 /* Provider Bridge Group Address */ 814 br->group_addr[5] = 0x08; 815 } 816 spin_unlock_bh(&br->lock); 817 } 818 819 /* Must be protected by RTNL. */ 820 void br_recalculate_fwd_mask(struct net_bridge *br) 821 { 822 if (!br_opt_get(br, BROPT_VLAN_ENABLED) || 823 br->vlan_proto == htons(ETH_P_8021Q)) 824 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT; 825 else /* vlan_enabled && ETH_P_8021AD */ 826 br->group_fwd_mask_required = BR_GROUPFWD_8021AD & 827 ~(1u << br->group_addr[5]); 828 } 829 830 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 831 struct netlink_ext_ack *extack) 832 { 833 struct switchdev_attr attr = { 834 .orig_dev = br->dev, 835 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 836 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 837 .u.vlan_filtering = val, 838 }; 839 int err; 840 841 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val) 842 return 0; 843 844 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val); 845 846 err = switchdev_port_attr_set(br->dev, &attr, extack); 847 if (err && err != -EOPNOTSUPP) { 848 br_opt_toggle(br, BROPT_VLAN_ENABLED, !val); 849 return err; 850 } 851 852 br_manage_promisc(br); 853 recalculate_group_addr(br); 854 br_recalculate_fwd_mask(br); 855 if (!val && br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) { 856 br_info(br, "vlan filtering disabled, automatically disabling multicast vlan snooping\n"); 857 br_multicast_toggle_vlan_snooping(br, false, NULL); 858 } 859 860 return 0; 861 } 862 863 bool br_vlan_enabled(const struct net_device *dev) 864 { 865 struct net_bridge *br = netdev_priv(dev); 866 867 return br_opt_get(br, BROPT_VLAN_ENABLED); 868 } 869 EXPORT_SYMBOL_GPL(br_vlan_enabled); 870 871 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto) 872 { 873 struct net_bridge *br = netdev_priv(dev); 874 875 *p_proto = ntohs(br->vlan_proto); 876 877 return 0; 878 } 879 EXPORT_SYMBOL_GPL(br_vlan_get_proto); 880 881 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 882 struct netlink_ext_ack *extack) 883 { 884 struct switchdev_attr attr = { 885 .orig_dev = br->dev, 886 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL, 887 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 888 .u.vlan_protocol = ntohs(proto), 889 }; 890 int err = 0; 891 struct net_bridge_port *p; 892 struct net_bridge_vlan *vlan; 893 struct net_bridge_vlan_group *vg; 894 __be16 oldproto = br->vlan_proto; 895 896 if (br->vlan_proto == proto) 897 return 0; 898 899 err = switchdev_port_attr_set(br->dev, &attr, extack); 900 if (err && err != -EOPNOTSUPP) 901 return err; 902 903 /* Add VLANs for the new proto to the device filter. */ 904 list_for_each_entry(p, &br->port_list, list) { 905 vg = nbp_vlan_group(p); 906 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 907 err = vlan_vid_add(p->dev, proto, vlan->vid); 908 if (err) 909 goto err_filt; 910 } 911 } 912 913 br->vlan_proto = proto; 914 915 recalculate_group_addr(br); 916 br_recalculate_fwd_mask(br); 917 918 /* Delete VLANs for the old proto from the device filter. */ 919 list_for_each_entry(p, &br->port_list, list) { 920 vg = nbp_vlan_group(p); 921 list_for_each_entry(vlan, &vg->vlan_list, vlist) 922 vlan_vid_del(p->dev, oldproto, vlan->vid); 923 } 924 925 return 0; 926 927 err_filt: 928 attr.u.vlan_protocol = ntohs(oldproto); 929 switchdev_port_attr_set(br->dev, &attr, NULL); 930 931 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist) 932 vlan_vid_del(p->dev, proto, vlan->vid); 933 934 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 935 vg = nbp_vlan_group(p); 936 list_for_each_entry(vlan, &vg->vlan_list, vlist) 937 vlan_vid_del(p->dev, proto, vlan->vid); 938 } 939 940 return err; 941 } 942 943 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 944 struct netlink_ext_ack *extack) 945 { 946 if (!eth_type_vlan(htons(val))) 947 return -EPROTONOSUPPORT; 948 949 return __br_vlan_set_proto(br, htons(val), extack); 950 } 951 952 int br_vlan_set_stats(struct net_bridge *br, unsigned long val) 953 { 954 switch (val) { 955 case 0: 956 case 1: 957 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val); 958 break; 959 default: 960 return -EINVAL; 961 } 962 963 return 0; 964 } 965 966 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val) 967 { 968 struct net_bridge_port *p; 969 970 /* allow to change the option if there are no port vlans configured */ 971 list_for_each_entry(p, &br->port_list, list) { 972 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 973 974 if (vg->num_vlans) 975 return -EBUSY; 976 } 977 978 switch (val) { 979 case 0: 980 case 1: 981 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val); 982 break; 983 default: 984 return -EINVAL; 985 } 986 987 return 0; 988 } 989 990 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid) 991 { 992 struct net_bridge_vlan *v; 993 994 if (vid != vg->pvid) 995 return false; 996 997 v = br_vlan_lookup(&vg->vlan_hash, vid); 998 if (v && br_vlan_should_use(v) && 999 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 1000 return true; 1001 1002 return false; 1003 } 1004 1005 static void br_vlan_disable_default_pvid(struct net_bridge *br) 1006 { 1007 struct net_bridge_port *p; 1008 u16 pvid = br->default_pvid; 1009 1010 /* Disable default_pvid on all ports where it is still 1011 * configured. 1012 */ 1013 if (vlan_default_pvid(br_vlan_group(br), pvid)) { 1014 if (!br_vlan_delete(br, pvid)) 1015 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); 1016 } 1017 1018 list_for_each_entry(p, &br->port_list, list) { 1019 if (vlan_default_pvid(nbp_vlan_group(p), pvid) && 1020 !nbp_vlan_delete(p, pvid)) 1021 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); 1022 } 1023 1024 br->default_pvid = 0; 1025 } 1026 1027 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1028 struct netlink_ext_ack *extack) 1029 { 1030 const struct net_bridge_vlan *pvent; 1031 struct net_bridge_vlan_group *vg; 1032 struct net_bridge_port *p; 1033 unsigned long *changed; 1034 bool vlchange; 1035 u16 old_pvid; 1036 int err = 0; 1037 1038 if (!pvid) { 1039 br_vlan_disable_default_pvid(br); 1040 return 0; 1041 } 1042 1043 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL); 1044 if (!changed) 1045 return -ENOMEM; 1046 1047 old_pvid = br->default_pvid; 1048 1049 /* Update default_pvid config only if we do not conflict with 1050 * user configuration. 1051 */ 1052 vg = br_vlan_group(br); 1053 pvent = br_vlan_find(vg, pvid); 1054 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) && 1055 (!pvent || !br_vlan_should_use(pvent))) { 1056 err = br_vlan_add(br, pvid, 1057 BRIDGE_VLAN_INFO_PVID | 1058 BRIDGE_VLAN_INFO_UNTAGGED | 1059 BRIDGE_VLAN_INFO_BRENTRY, 1060 &vlchange, extack); 1061 if (err) 1062 goto out; 1063 1064 if (br_vlan_delete(br, old_pvid)) 1065 br_vlan_notify(br, NULL, old_pvid, 0, RTM_DELVLAN); 1066 br_vlan_notify(br, NULL, pvid, 0, RTM_NEWVLAN); 1067 set_bit(0, changed); 1068 } 1069 1070 list_for_each_entry(p, &br->port_list, list) { 1071 /* Update default_pvid config only if we do not conflict with 1072 * user configuration. 1073 */ 1074 vg = nbp_vlan_group(p); 1075 if ((old_pvid && 1076 !vlan_default_pvid(vg, old_pvid)) || 1077 br_vlan_find(vg, pvid)) 1078 continue; 1079 1080 err = nbp_vlan_add(p, pvid, 1081 BRIDGE_VLAN_INFO_PVID | 1082 BRIDGE_VLAN_INFO_UNTAGGED, 1083 &vlchange, extack); 1084 if (err) 1085 goto err_port; 1086 if (nbp_vlan_delete(p, old_pvid)) 1087 br_vlan_notify(br, p, old_pvid, 0, RTM_DELVLAN); 1088 br_vlan_notify(p->br, p, pvid, 0, RTM_NEWVLAN); 1089 set_bit(p->port_no, changed); 1090 } 1091 1092 br->default_pvid = pvid; 1093 1094 out: 1095 bitmap_free(changed); 1096 return err; 1097 1098 err_port: 1099 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 1100 if (!test_bit(p->port_no, changed)) 1101 continue; 1102 1103 if (old_pvid) { 1104 nbp_vlan_add(p, old_pvid, 1105 BRIDGE_VLAN_INFO_PVID | 1106 BRIDGE_VLAN_INFO_UNTAGGED, 1107 &vlchange, NULL); 1108 br_vlan_notify(p->br, p, old_pvid, 0, RTM_NEWVLAN); 1109 } 1110 nbp_vlan_delete(p, pvid); 1111 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); 1112 } 1113 1114 if (test_bit(0, changed)) { 1115 if (old_pvid) { 1116 br_vlan_add(br, old_pvid, 1117 BRIDGE_VLAN_INFO_PVID | 1118 BRIDGE_VLAN_INFO_UNTAGGED | 1119 BRIDGE_VLAN_INFO_BRENTRY, 1120 &vlchange, NULL); 1121 br_vlan_notify(br, NULL, old_pvid, 0, RTM_NEWVLAN); 1122 } 1123 br_vlan_delete(br, pvid); 1124 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); 1125 } 1126 goto out; 1127 } 1128 1129 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1130 struct netlink_ext_ack *extack) 1131 { 1132 u16 pvid = val; 1133 int err = 0; 1134 1135 if (val >= VLAN_VID_MASK) 1136 return -EINVAL; 1137 1138 if (pvid == br->default_pvid) 1139 goto out; 1140 1141 /* Only allow default pvid change when filtering is disabled */ 1142 if (br_opt_get(br, BROPT_VLAN_ENABLED)) { 1143 pr_info_once("Please disable vlan filtering to change default_pvid\n"); 1144 err = -EPERM; 1145 goto out; 1146 } 1147 err = __br_vlan_set_default_pvid(br, pvid, extack); 1148 out: 1149 return err; 1150 } 1151 1152 int br_vlan_init(struct net_bridge *br) 1153 { 1154 struct net_bridge_vlan_group *vg; 1155 int ret = -ENOMEM; 1156 1157 vg = kzalloc(sizeof(*vg), GFP_KERNEL); 1158 if (!vg) 1159 goto out; 1160 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1161 if (ret) 1162 goto err_rhtbl; 1163 ret = vlan_tunnel_init(vg); 1164 if (ret) 1165 goto err_tunnel_init; 1166 INIT_LIST_HEAD(&vg->vlan_list); 1167 br->vlan_proto = htons(ETH_P_8021Q); 1168 br->default_pvid = 1; 1169 rcu_assign_pointer(br->vlgrp, vg); 1170 1171 out: 1172 return ret; 1173 1174 err_tunnel_init: 1175 rhashtable_destroy(&vg->vlan_hash); 1176 err_rhtbl: 1177 kfree(vg); 1178 1179 goto out; 1180 } 1181 1182 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack) 1183 { 1184 struct switchdev_attr attr = { 1185 .orig_dev = p->br->dev, 1186 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 1187 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 1188 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED), 1189 }; 1190 struct net_bridge_vlan_group *vg; 1191 int ret = -ENOMEM; 1192 1193 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); 1194 if (!vg) 1195 goto out; 1196 1197 ret = switchdev_port_attr_set(p->dev, &attr, extack); 1198 if (ret && ret != -EOPNOTSUPP) 1199 goto err_vlan_enabled; 1200 1201 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1202 if (ret) 1203 goto err_rhtbl; 1204 ret = vlan_tunnel_init(vg); 1205 if (ret) 1206 goto err_tunnel_init; 1207 INIT_LIST_HEAD(&vg->vlan_list); 1208 rcu_assign_pointer(p->vlgrp, vg); 1209 if (p->br->default_pvid) { 1210 bool changed; 1211 1212 ret = nbp_vlan_add(p, p->br->default_pvid, 1213 BRIDGE_VLAN_INFO_PVID | 1214 BRIDGE_VLAN_INFO_UNTAGGED, 1215 &changed, extack); 1216 if (ret) 1217 goto err_vlan_add; 1218 br_vlan_notify(p->br, p, p->br->default_pvid, 0, RTM_NEWVLAN); 1219 } 1220 out: 1221 return ret; 1222 1223 err_vlan_add: 1224 RCU_INIT_POINTER(p->vlgrp, NULL); 1225 synchronize_rcu(); 1226 vlan_tunnel_deinit(vg); 1227 err_tunnel_init: 1228 rhashtable_destroy(&vg->vlan_hash); 1229 err_rhtbl: 1230 err_vlan_enabled: 1231 kfree(vg); 1232 1233 goto out; 1234 } 1235 1236 /* Must be protected by RTNL. 1237 * Must be called with vid in range from 1 to 4094 inclusive. 1238 * changed must be true only if the vlan was created or updated 1239 */ 1240 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1241 bool *changed, struct netlink_ext_ack *extack) 1242 { 1243 struct net_bridge_vlan *vlan; 1244 int ret; 1245 1246 ASSERT_RTNL(); 1247 1248 *changed = false; 1249 vlan = br_vlan_find(nbp_vlan_group(port), vid); 1250 if (vlan) { 1251 /* Pass the flags to the hardware bridge */ 1252 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack); 1253 if (ret && ret != -EOPNOTSUPP) 1254 return ret; 1255 *changed = __vlan_add_flags(vlan, flags); 1256 1257 return 0; 1258 } 1259 1260 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 1261 if (!vlan) 1262 return -ENOMEM; 1263 1264 vlan->vid = vid; 1265 vlan->port = port; 1266 ret = __vlan_add(vlan, flags, extack); 1267 if (ret) 1268 kfree(vlan); 1269 else 1270 *changed = true; 1271 1272 return ret; 1273 } 1274 1275 /* Must be protected by RTNL. 1276 * Must be called with vid in range from 1 to 4094 inclusive. 1277 */ 1278 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1279 { 1280 struct net_bridge_vlan *v; 1281 1282 ASSERT_RTNL(); 1283 1284 v = br_vlan_find(nbp_vlan_group(port), vid); 1285 if (!v) 1286 return -ENOENT; 1287 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); 1288 br_fdb_delete_by_port(port->br, port, vid, 0); 1289 1290 return __vlan_del(v); 1291 } 1292 1293 void nbp_vlan_flush(struct net_bridge_port *port) 1294 { 1295 struct net_bridge_vlan_group *vg; 1296 1297 ASSERT_RTNL(); 1298 1299 vg = nbp_vlan_group(port); 1300 __vlan_flush(port->br, port, vg); 1301 RCU_INIT_POINTER(port->vlgrp, NULL); 1302 synchronize_rcu(); 1303 __vlan_group_free(vg); 1304 } 1305 1306 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1307 struct pcpu_sw_netstats *stats) 1308 { 1309 int i; 1310 1311 memset(stats, 0, sizeof(*stats)); 1312 for_each_possible_cpu(i) { 1313 u64 rxpackets, rxbytes, txpackets, txbytes; 1314 struct pcpu_sw_netstats *cpu_stats; 1315 unsigned int start; 1316 1317 cpu_stats = per_cpu_ptr(v->stats, i); 1318 do { 1319 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 1320 rxpackets = cpu_stats->rx_packets; 1321 rxbytes = cpu_stats->rx_bytes; 1322 txbytes = cpu_stats->tx_bytes; 1323 txpackets = cpu_stats->tx_packets; 1324 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 1325 1326 stats->rx_packets += rxpackets; 1327 stats->rx_bytes += rxbytes; 1328 stats->tx_bytes += txbytes; 1329 stats->tx_packets += txpackets; 1330 } 1331 } 1332 1333 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 1334 { 1335 struct net_bridge_vlan_group *vg; 1336 struct net_bridge_port *p; 1337 1338 ASSERT_RTNL(); 1339 p = br_port_get_check_rtnl(dev); 1340 if (p) 1341 vg = nbp_vlan_group(p); 1342 else if (netif_is_bridge_master(dev)) 1343 vg = br_vlan_group(netdev_priv(dev)); 1344 else 1345 return -EINVAL; 1346 1347 *p_pvid = br_get_pvid(vg); 1348 return 0; 1349 } 1350 EXPORT_SYMBOL_GPL(br_vlan_get_pvid); 1351 1352 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) 1353 { 1354 struct net_bridge_vlan_group *vg; 1355 struct net_bridge_port *p; 1356 1357 p = br_port_get_check_rcu(dev); 1358 if (p) 1359 vg = nbp_vlan_group_rcu(p); 1360 else if (netif_is_bridge_master(dev)) 1361 vg = br_vlan_group_rcu(netdev_priv(dev)); 1362 else 1363 return -EINVAL; 1364 1365 *p_pvid = br_get_pvid(vg); 1366 return 0; 1367 } 1368 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu); 1369 1370 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1371 struct net_device_path_ctx *ctx, 1372 struct net_device_path *path) 1373 { 1374 struct net_bridge_vlan_group *vg; 1375 int idx = ctx->num_vlans - 1; 1376 u16 vid; 1377 1378 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_KEEP; 1379 1380 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 1381 return; 1382 1383 vg = br_vlan_group(br); 1384 1385 if (idx >= 0 && 1386 ctx->vlan[idx].proto == br->vlan_proto) { 1387 vid = ctx->vlan[idx].id; 1388 } else { 1389 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_TAG; 1390 vid = br_get_pvid(vg); 1391 } 1392 1393 path->bridge.vlan_id = vid; 1394 path->bridge.vlan_proto = br->vlan_proto; 1395 } 1396 1397 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1398 struct net_bridge_port *dst, 1399 struct net_device_path *path) 1400 { 1401 struct net_bridge_vlan_group *vg; 1402 struct net_bridge_vlan *v; 1403 1404 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 1405 return 0; 1406 1407 vg = nbp_vlan_group_rcu(dst); 1408 v = br_vlan_find(vg, path->bridge.vlan_id); 1409 if (!v || !br_vlan_should_use(v)) 1410 return -EINVAL; 1411 1412 if (!(v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 1413 return 0; 1414 1415 if (path->bridge.vlan_mode == DEV_PATH_BR_VLAN_TAG) 1416 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_KEEP; 1417 else if (v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV) 1418 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_UNTAG_HW; 1419 else 1420 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_UNTAG; 1421 1422 return 0; 1423 } 1424 1425 int br_vlan_get_info(const struct net_device *dev, u16 vid, 1426 struct bridge_vlan_info *p_vinfo) 1427 { 1428 struct net_bridge_vlan_group *vg; 1429 struct net_bridge_vlan *v; 1430 struct net_bridge_port *p; 1431 1432 ASSERT_RTNL(); 1433 p = br_port_get_check_rtnl(dev); 1434 if (p) 1435 vg = nbp_vlan_group(p); 1436 else if (netif_is_bridge_master(dev)) 1437 vg = br_vlan_group(netdev_priv(dev)); 1438 else 1439 return -EINVAL; 1440 1441 v = br_vlan_find(vg, vid); 1442 if (!v) 1443 return -ENOENT; 1444 1445 p_vinfo->vid = vid; 1446 p_vinfo->flags = v->flags; 1447 if (vid == br_get_pvid(vg)) 1448 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID; 1449 return 0; 1450 } 1451 EXPORT_SYMBOL_GPL(br_vlan_get_info); 1452 1453 int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid, 1454 struct bridge_vlan_info *p_vinfo) 1455 { 1456 struct net_bridge_vlan_group *vg; 1457 struct net_bridge_vlan *v; 1458 struct net_bridge_port *p; 1459 1460 p = br_port_get_check_rcu(dev); 1461 if (p) 1462 vg = nbp_vlan_group_rcu(p); 1463 else if (netif_is_bridge_master(dev)) 1464 vg = br_vlan_group_rcu(netdev_priv(dev)); 1465 else 1466 return -EINVAL; 1467 1468 v = br_vlan_find(vg, vid); 1469 if (!v) 1470 return -ENOENT; 1471 1472 p_vinfo->vid = vid; 1473 p_vinfo->flags = v->flags; 1474 if (vid == br_get_pvid(vg)) 1475 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID; 1476 return 0; 1477 } 1478 EXPORT_SYMBOL_GPL(br_vlan_get_info_rcu); 1479 1480 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev) 1481 { 1482 return is_vlan_dev(dev) && 1483 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING); 1484 } 1485 1486 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev, 1487 __always_unused struct netdev_nested_priv *priv) 1488 { 1489 return br_vlan_is_bind_vlan_dev(dev); 1490 } 1491 1492 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev) 1493 { 1494 int found; 1495 1496 rcu_read_lock(); 1497 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn, 1498 NULL); 1499 rcu_read_unlock(); 1500 1501 return !!found; 1502 } 1503 1504 struct br_vlan_bind_walk_data { 1505 u16 vid; 1506 struct net_device *result; 1507 }; 1508 1509 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev, 1510 struct netdev_nested_priv *priv) 1511 { 1512 struct br_vlan_bind_walk_data *data = priv->data; 1513 int found = 0; 1514 1515 if (br_vlan_is_bind_vlan_dev(dev) && 1516 vlan_dev_priv(dev)->vlan_id == data->vid) { 1517 data->result = dev; 1518 found = 1; 1519 } 1520 1521 return found; 1522 } 1523 1524 static struct net_device * 1525 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid) 1526 { 1527 struct br_vlan_bind_walk_data data = { 1528 .vid = vid, 1529 }; 1530 struct netdev_nested_priv priv = { 1531 .data = (void *)&data, 1532 }; 1533 1534 rcu_read_lock(); 1535 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn, 1536 &priv); 1537 rcu_read_unlock(); 1538 1539 return data.result; 1540 } 1541 1542 static bool br_vlan_is_dev_up(const struct net_device *dev) 1543 { 1544 return !!(dev->flags & IFF_UP) && netif_oper_up(dev); 1545 } 1546 1547 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br, 1548 struct net_device *vlan_dev) 1549 { 1550 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id; 1551 struct net_bridge_vlan_group *vg; 1552 struct net_bridge_port *p; 1553 bool has_carrier = false; 1554 1555 if (!netif_carrier_ok(br->dev)) { 1556 netif_carrier_off(vlan_dev); 1557 return; 1558 } 1559 1560 list_for_each_entry(p, &br->port_list, list) { 1561 vg = nbp_vlan_group(p); 1562 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) { 1563 has_carrier = true; 1564 break; 1565 } 1566 } 1567 1568 if (has_carrier) 1569 netif_carrier_on(vlan_dev); 1570 else 1571 netif_carrier_off(vlan_dev); 1572 } 1573 1574 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p) 1575 { 1576 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 1577 struct net_bridge_vlan *vlan; 1578 struct net_device *vlan_dev; 1579 1580 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 1581 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, 1582 vlan->vid); 1583 if (vlan_dev) { 1584 if (br_vlan_is_dev_up(p->dev)) { 1585 if (netif_carrier_ok(p->br->dev)) 1586 netif_carrier_on(vlan_dev); 1587 } else { 1588 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1589 } 1590 } 1591 } 1592 } 1593 1594 static void br_vlan_upper_change(struct net_device *dev, 1595 struct net_device *upper_dev, 1596 bool linking) 1597 { 1598 struct net_bridge *br = netdev_priv(dev); 1599 1600 if (!br_vlan_is_bind_vlan_dev(upper_dev)) 1601 return; 1602 1603 if (linking) { 1604 br_vlan_set_vlan_dev_state(br, upper_dev); 1605 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true); 1606 } else { 1607 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, 1608 br_vlan_has_upper_bind_vlan_dev(dev)); 1609 } 1610 } 1611 1612 struct br_vlan_link_state_walk_data { 1613 struct net_bridge *br; 1614 }; 1615 1616 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev, 1617 struct netdev_nested_priv *priv) 1618 { 1619 struct br_vlan_link_state_walk_data *data = priv->data; 1620 1621 if (br_vlan_is_bind_vlan_dev(vlan_dev)) 1622 br_vlan_set_vlan_dev_state(data->br, vlan_dev); 1623 1624 return 0; 1625 } 1626 1627 static void br_vlan_link_state_change(struct net_device *dev, 1628 struct net_bridge *br) 1629 { 1630 struct br_vlan_link_state_walk_data data = { 1631 .br = br 1632 }; 1633 struct netdev_nested_priv priv = { 1634 .data = (void *)&data, 1635 }; 1636 1637 rcu_read_lock(); 1638 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn, 1639 &priv); 1640 rcu_read_unlock(); 1641 } 1642 1643 /* Must be protected by RTNL. */ 1644 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid) 1645 { 1646 struct net_device *vlan_dev; 1647 1648 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1649 return; 1650 1651 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid); 1652 if (vlan_dev) 1653 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1654 } 1655 1656 /* Must be protected by RTNL. */ 1657 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr) 1658 { 1659 struct netdev_notifier_changeupper_info *info; 1660 struct net_bridge *br = netdev_priv(dev); 1661 int vlcmd = 0, ret = 0; 1662 bool changed = false; 1663 1664 switch (event) { 1665 case NETDEV_REGISTER: 1666 ret = br_vlan_add(br, br->default_pvid, 1667 BRIDGE_VLAN_INFO_PVID | 1668 BRIDGE_VLAN_INFO_UNTAGGED | 1669 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL); 1670 vlcmd = RTM_NEWVLAN; 1671 break; 1672 case NETDEV_UNREGISTER: 1673 changed = !br_vlan_delete(br, br->default_pvid); 1674 vlcmd = RTM_DELVLAN; 1675 break; 1676 case NETDEV_CHANGEUPPER: 1677 info = ptr; 1678 br_vlan_upper_change(dev, info->upper_dev, info->linking); 1679 break; 1680 1681 case NETDEV_CHANGE: 1682 case NETDEV_UP: 1683 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING)) 1684 break; 1685 br_vlan_link_state_change(dev, br); 1686 break; 1687 } 1688 if (changed) 1689 br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd); 1690 1691 return ret; 1692 } 1693 1694 /* Must be protected by RTNL. */ 1695 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event) 1696 { 1697 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1698 return; 1699 1700 switch (event) { 1701 case NETDEV_CHANGE: 1702 case NETDEV_DOWN: 1703 case NETDEV_UP: 1704 br_vlan_set_all_vlan_dev_state(p); 1705 break; 1706 } 1707 } 1708 1709 static bool br_vlan_stats_fill(struct sk_buff *skb, 1710 const struct net_bridge_vlan *v) 1711 { 1712 struct pcpu_sw_netstats stats; 1713 struct nlattr *nest; 1714 1715 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_STATS); 1716 if (!nest) 1717 return false; 1718 1719 br_vlan_get_stats(v, &stats); 1720 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES, stats.rx_bytes, 1721 BRIDGE_VLANDB_STATS_PAD) || 1722 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_PACKETS, 1723 stats.rx_packets, BRIDGE_VLANDB_STATS_PAD) || 1724 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES, stats.tx_bytes, 1725 BRIDGE_VLANDB_STATS_PAD) || 1726 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_PACKETS, 1727 stats.tx_packets, BRIDGE_VLANDB_STATS_PAD)) 1728 goto out_err; 1729 1730 nla_nest_end(skb, nest); 1731 1732 return true; 1733 1734 out_err: 1735 nla_nest_cancel(skb, nest); 1736 return false; 1737 } 1738 1739 /* v_opts is used to dump the options which must be equal in the whole range */ 1740 static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range, 1741 const struct net_bridge_vlan *v_opts, 1742 u16 flags, 1743 bool dump_stats) 1744 { 1745 struct bridge_vlan_info info; 1746 struct nlattr *nest; 1747 1748 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY); 1749 if (!nest) 1750 return false; 1751 1752 memset(&info, 0, sizeof(info)); 1753 info.vid = vid; 1754 if (flags & BRIDGE_VLAN_INFO_UNTAGGED) 1755 info.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 1756 if (flags & BRIDGE_VLAN_INFO_PVID) 1757 info.flags |= BRIDGE_VLAN_INFO_PVID; 1758 1759 if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info)) 1760 goto out_err; 1761 1762 if (vid_range && vid < vid_range && 1763 !(flags & BRIDGE_VLAN_INFO_PVID) && 1764 nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range)) 1765 goto out_err; 1766 1767 if (v_opts) { 1768 if (!br_vlan_opts_fill(skb, v_opts)) 1769 goto out_err; 1770 1771 if (dump_stats && !br_vlan_stats_fill(skb, v_opts)) 1772 goto out_err; 1773 } 1774 1775 nla_nest_end(skb, nest); 1776 1777 return true; 1778 1779 out_err: 1780 nla_nest_cancel(skb, nest); 1781 return false; 1782 } 1783 1784 static size_t rtnl_vlan_nlmsg_size(void) 1785 { 1786 return NLMSG_ALIGN(sizeof(struct br_vlan_msg)) 1787 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */ 1788 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */ 1789 + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */ 1790 + br_vlan_opts_nl_size(); /* bridge vlan options */ 1791 } 1792 1793 void br_vlan_notify(const struct net_bridge *br, 1794 const struct net_bridge_port *p, 1795 u16 vid, u16 vid_range, 1796 int cmd) 1797 { 1798 struct net_bridge_vlan_group *vg; 1799 struct net_bridge_vlan *v = NULL; 1800 struct br_vlan_msg *bvm; 1801 struct nlmsghdr *nlh; 1802 struct sk_buff *skb; 1803 int err = -ENOBUFS; 1804 struct net *net; 1805 u16 flags = 0; 1806 int ifindex; 1807 1808 /* right now notifications are done only with rtnl held */ 1809 ASSERT_RTNL(); 1810 1811 if (p) { 1812 ifindex = p->dev->ifindex; 1813 vg = nbp_vlan_group(p); 1814 net = dev_net(p->dev); 1815 } else { 1816 ifindex = br->dev->ifindex; 1817 vg = br_vlan_group(br); 1818 net = dev_net(br->dev); 1819 } 1820 1821 skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL); 1822 if (!skb) 1823 goto out_err; 1824 1825 err = -EMSGSIZE; 1826 nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0); 1827 if (!nlh) 1828 goto out_err; 1829 bvm = nlmsg_data(nlh); 1830 memset(bvm, 0, sizeof(*bvm)); 1831 bvm->family = AF_BRIDGE; 1832 bvm->ifindex = ifindex; 1833 1834 switch (cmd) { 1835 case RTM_NEWVLAN: 1836 /* need to find the vlan due to flags/options */ 1837 v = br_vlan_find(vg, vid); 1838 if (!v || !br_vlan_should_use(v)) 1839 goto out_kfree; 1840 1841 flags = v->flags; 1842 if (br_get_pvid(vg) == v->vid) 1843 flags |= BRIDGE_VLAN_INFO_PVID; 1844 break; 1845 case RTM_DELVLAN: 1846 break; 1847 default: 1848 goto out_kfree; 1849 } 1850 1851 if (!br_vlan_fill_vids(skb, vid, vid_range, v, flags, false)) 1852 goto out_err; 1853 1854 nlmsg_end(skb, nlh); 1855 rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL); 1856 return; 1857 1858 out_err: 1859 rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err); 1860 out_kfree: 1861 kfree_skb(skb); 1862 } 1863 1864 static int br_vlan_replay_one(struct notifier_block *nb, 1865 struct net_device *dev, 1866 struct switchdev_obj_port_vlan *vlan, 1867 const void *ctx, unsigned long action, 1868 struct netlink_ext_ack *extack) 1869 { 1870 struct switchdev_notifier_port_obj_info obj_info = { 1871 .info = { 1872 .dev = dev, 1873 .extack = extack, 1874 .ctx = ctx, 1875 }, 1876 .obj = &vlan->obj, 1877 }; 1878 int err; 1879 1880 err = nb->notifier_call(nb, action, &obj_info); 1881 return notifier_to_errno(err); 1882 } 1883 1884 int br_vlan_replay(struct net_device *br_dev, struct net_device *dev, 1885 const void *ctx, bool adding, struct notifier_block *nb, 1886 struct netlink_ext_ack *extack) 1887 { 1888 struct net_bridge_vlan_group *vg; 1889 struct net_bridge_vlan *v; 1890 struct net_bridge_port *p; 1891 struct net_bridge *br; 1892 unsigned long action; 1893 int err = 0; 1894 u16 pvid; 1895 1896 ASSERT_RTNL(); 1897 1898 if (!nb) 1899 return 0; 1900 1901 if (!netif_is_bridge_master(br_dev)) 1902 return -EINVAL; 1903 1904 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) 1905 return -EINVAL; 1906 1907 if (netif_is_bridge_master(dev)) { 1908 br = netdev_priv(dev); 1909 vg = br_vlan_group(br); 1910 p = NULL; 1911 } else { 1912 p = br_port_get_rtnl(dev); 1913 if (WARN_ON(!p)) 1914 return -EINVAL; 1915 vg = nbp_vlan_group(p); 1916 br = p->br; 1917 } 1918 1919 if (!vg) 1920 return 0; 1921 1922 if (adding) 1923 action = SWITCHDEV_PORT_OBJ_ADD; 1924 else 1925 action = SWITCHDEV_PORT_OBJ_DEL; 1926 1927 pvid = br_get_pvid(vg); 1928 1929 list_for_each_entry(v, &vg->vlan_list, vlist) { 1930 struct switchdev_obj_port_vlan vlan = { 1931 .obj.orig_dev = dev, 1932 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1933 .flags = br_vlan_flags(v, pvid), 1934 .vid = v->vid, 1935 }; 1936 1937 if (!br_vlan_should_use(v)) 1938 continue; 1939 1940 err = br_vlan_replay_one(nb, dev, &vlan, ctx, action, extack); 1941 if (err) 1942 return err; 1943 } 1944 1945 return err; 1946 } 1947 1948 /* check if v_curr can enter a range ending in range_end */ 1949 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1950 const struct net_bridge_vlan *range_end) 1951 { 1952 return v_curr->vid - range_end->vid == 1 && 1953 range_end->flags == v_curr->flags && 1954 br_vlan_opts_eq_range(v_curr, range_end); 1955 } 1956 1957 static int br_vlan_dump_dev(const struct net_device *dev, 1958 struct sk_buff *skb, 1959 struct netlink_callback *cb, 1960 u32 dump_flags) 1961 { 1962 struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL; 1963 bool dump_global = !!(dump_flags & BRIDGE_VLANDB_DUMPF_GLOBAL); 1964 bool dump_stats = !!(dump_flags & BRIDGE_VLANDB_DUMPF_STATS); 1965 struct net_bridge_vlan_group *vg; 1966 int idx = 0, s_idx = cb->args[1]; 1967 struct nlmsghdr *nlh = NULL; 1968 struct net_bridge_port *p; 1969 struct br_vlan_msg *bvm; 1970 struct net_bridge *br; 1971 int err = 0; 1972 u16 pvid; 1973 1974 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) 1975 return -EINVAL; 1976 1977 if (netif_is_bridge_master(dev)) { 1978 br = netdev_priv(dev); 1979 vg = br_vlan_group_rcu(br); 1980 p = NULL; 1981 } else { 1982 /* global options are dumped only for bridge devices */ 1983 if (dump_global) 1984 return 0; 1985 1986 p = br_port_get_rcu(dev); 1987 if (WARN_ON(!p)) 1988 return -EINVAL; 1989 vg = nbp_vlan_group_rcu(p); 1990 br = p->br; 1991 } 1992 1993 if (!vg) 1994 return 0; 1995 1996 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 1997 RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI); 1998 if (!nlh) 1999 return -EMSGSIZE; 2000 bvm = nlmsg_data(nlh); 2001 memset(bvm, 0, sizeof(*bvm)); 2002 bvm->family = PF_BRIDGE; 2003 bvm->ifindex = dev->ifindex; 2004 pvid = br_get_pvid(vg); 2005 2006 /* idx must stay at range's beginning until it is filled in */ 2007 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 2008 if (!dump_global && !br_vlan_should_use(v)) 2009 continue; 2010 if (idx < s_idx) { 2011 idx++; 2012 continue; 2013 } 2014 2015 if (!range_start) { 2016 range_start = v; 2017 range_end = v; 2018 continue; 2019 } 2020 2021 if (dump_global) { 2022 if (br_vlan_global_opts_can_enter_range(v, range_end)) 2023 goto update_end; 2024 if (!br_vlan_global_opts_fill(skb, range_start->vid, 2025 range_end->vid, 2026 range_start)) { 2027 err = -EMSGSIZE; 2028 break; 2029 } 2030 /* advance number of filled vlans */ 2031 idx += range_end->vid - range_start->vid + 1; 2032 2033 range_start = v; 2034 } else if (dump_stats || v->vid == pvid || 2035 !br_vlan_can_enter_range(v, range_end)) { 2036 u16 vlan_flags = br_vlan_flags(range_start, pvid); 2037 2038 if (!br_vlan_fill_vids(skb, range_start->vid, 2039 range_end->vid, range_start, 2040 vlan_flags, dump_stats)) { 2041 err = -EMSGSIZE; 2042 break; 2043 } 2044 /* advance number of filled vlans */ 2045 idx += range_end->vid - range_start->vid + 1; 2046 2047 range_start = v; 2048 } 2049 update_end: 2050 range_end = v; 2051 } 2052 2053 /* err will be 0 and range_start will be set in 3 cases here: 2054 * - first vlan (range_start == range_end) 2055 * - last vlan (range_start == range_end, not in range) 2056 * - last vlan range (range_start != range_end, in range) 2057 */ 2058 if (!err && range_start) { 2059 if (dump_global && 2060 !br_vlan_global_opts_fill(skb, range_start->vid, 2061 range_end->vid, range_start)) 2062 err = -EMSGSIZE; 2063 else if (!dump_global && 2064 !br_vlan_fill_vids(skb, range_start->vid, 2065 range_end->vid, range_start, 2066 br_vlan_flags(range_start, pvid), 2067 dump_stats)) 2068 err = -EMSGSIZE; 2069 } 2070 2071 cb->args[1] = err ? idx : 0; 2072 2073 nlmsg_end(skb, nlh); 2074 2075 return err; 2076 } 2077 2078 static const struct nla_policy br_vlan_db_dump_pol[BRIDGE_VLANDB_DUMP_MAX + 1] = { 2079 [BRIDGE_VLANDB_DUMP_FLAGS] = { .type = NLA_U32 }, 2080 }; 2081 2082 static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb) 2083 { 2084 struct nlattr *dtb[BRIDGE_VLANDB_DUMP_MAX + 1]; 2085 int idx = 0, err = 0, s_idx = cb->args[0]; 2086 struct net *net = sock_net(skb->sk); 2087 struct br_vlan_msg *bvm; 2088 struct net_device *dev; 2089 u32 dump_flags = 0; 2090 2091 err = nlmsg_parse(cb->nlh, sizeof(*bvm), dtb, BRIDGE_VLANDB_DUMP_MAX, 2092 br_vlan_db_dump_pol, cb->extack); 2093 if (err < 0) 2094 return err; 2095 2096 bvm = nlmsg_data(cb->nlh); 2097 if (dtb[BRIDGE_VLANDB_DUMP_FLAGS]) 2098 dump_flags = nla_get_u32(dtb[BRIDGE_VLANDB_DUMP_FLAGS]); 2099 2100 rcu_read_lock(); 2101 if (bvm->ifindex) { 2102 dev = dev_get_by_index_rcu(net, bvm->ifindex); 2103 if (!dev) { 2104 err = -ENODEV; 2105 goto out_err; 2106 } 2107 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 2108 if (err && err != -EMSGSIZE) 2109 goto out_err; 2110 } else { 2111 for_each_netdev_rcu(net, dev) { 2112 if (idx < s_idx) 2113 goto skip; 2114 2115 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 2116 if (err == -EMSGSIZE) 2117 break; 2118 skip: 2119 idx++; 2120 } 2121 } 2122 cb->args[0] = idx; 2123 rcu_read_unlock(); 2124 2125 return skb->len; 2126 2127 out_err: 2128 rcu_read_unlock(); 2129 2130 return err; 2131 } 2132 2133 static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = { 2134 [BRIDGE_VLANDB_ENTRY_INFO] = 2135 NLA_POLICY_EXACT_LEN(sizeof(struct bridge_vlan_info)), 2136 [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 }, 2137 [BRIDGE_VLANDB_ENTRY_STATE] = { .type = NLA_U8 }, 2138 [BRIDGE_VLANDB_ENTRY_TUNNEL_INFO] = { .type = NLA_NESTED }, 2139 [BRIDGE_VLANDB_ENTRY_MCAST_ROUTER] = { .type = NLA_U8 }, 2140 }; 2141 2142 static int br_vlan_rtm_process_one(struct net_device *dev, 2143 const struct nlattr *attr, 2144 int cmd, struct netlink_ext_ack *extack) 2145 { 2146 struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL; 2147 struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1]; 2148 bool changed = false, skip_processing = false; 2149 struct net_bridge_vlan_group *vg; 2150 struct net_bridge_port *p = NULL; 2151 int err = 0, cmdmap = 0; 2152 struct net_bridge *br; 2153 2154 if (netif_is_bridge_master(dev)) { 2155 br = netdev_priv(dev); 2156 vg = br_vlan_group(br); 2157 } else { 2158 p = br_port_get_rtnl(dev); 2159 if (WARN_ON(!p)) 2160 return -ENODEV; 2161 br = p->br; 2162 vg = nbp_vlan_group(p); 2163 } 2164 2165 if (WARN_ON(!vg)) 2166 return -ENODEV; 2167 2168 err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr, 2169 br_vlan_db_policy, extack); 2170 if (err) 2171 return err; 2172 2173 if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) { 2174 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info"); 2175 return -EINVAL; 2176 } 2177 memset(&vrange_end, 0, sizeof(vrange_end)); 2178 2179 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]); 2180 if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 2181 BRIDGE_VLAN_INFO_RANGE_END)) { 2182 NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls"); 2183 return -EINVAL; 2184 } 2185 if (!br_vlan_valid_id(vinfo->vid, extack)) 2186 return -EINVAL; 2187 2188 if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) { 2189 vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]); 2190 /* validate user-provided flags without RANGE_BEGIN */ 2191 vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags; 2192 vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; 2193 2194 /* vinfo_last is the range start, vinfo the range end */ 2195 vinfo_last = vinfo; 2196 vinfo = &vrange_end; 2197 2198 if (!br_vlan_valid_id(vinfo->vid, extack) || 2199 !br_vlan_valid_range(vinfo, vinfo_last, extack)) 2200 return -EINVAL; 2201 } 2202 2203 switch (cmd) { 2204 case RTM_NEWVLAN: 2205 cmdmap = RTM_SETLINK; 2206 skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS); 2207 break; 2208 case RTM_DELVLAN: 2209 cmdmap = RTM_DELLINK; 2210 break; 2211 } 2212 2213 if (!skip_processing) { 2214 struct bridge_vlan_info *tmp_last = vinfo_last; 2215 2216 /* br_process_vlan_info may overwrite vinfo_last */ 2217 err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last, 2218 &changed, extack); 2219 2220 /* notify first if anything changed */ 2221 if (changed) 2222 br_ifinfo_notify(cmdmap, br, p); 2223 2224 if (err) 2225 return err; 2226 } 2227 2228 /* deal with options */ 2229 if (cmd == RTM_NEWVLAN) { 2230 struct net_bridge_vlan *range_start, *range_end; 2231 2232 if (vinfo_last) { 2233 range_start = br_vlan_find(vg, vinfo_last->vid); 2234 range_end = br_vlan_find(vg, vinfo->vid); 2235 } else { 2236 range_start = br_vlan_find(vg, vinfo->vid); 2237 range_end = range_start; 2238 } 2239 2240 err = br_vlan_process_options(br, p, range_start, range_end, 2241 tb, extack); 2242 } 2243 2244 return err; 2245 } 2246 2247 static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh, 2248 struct netlink_ext_ack *extack) 2249 { 2250 struct net *net = sock_net(skb->sk); 2251 struct br_vlan_msg *bvm; 2252 struct net_device *dev; 2253 struct nlattr *attr; 2254 int err, vlans = 0; 2255 int rem; 2256 2257 /* this should validate the header and check for remaining bytes */ 2258 err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL, 2259 extack); 2260 if (err < 0) 2261 return err; 2262 2263 bvm = nlmsg_data(nlh); 2264 dev = __dev_get_by_index(net, bvm->ifindex); 2265 if (!dev) 2266 return -ENODEV; 2267 2268 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) { 2269 NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port"); 2270 return -EINVAL; 2271 } 2272 2273 nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) { 2274 switch (nla_type(attr)) { 2275 case BRIDGE_VLANDB_ENTRY: 2276 err = br_vlan_rtm_process_one(dev, attr, 2277 nlh->nlmsg_type, 2278 extack); 2279 break; 2280 case BRIDGE_VLANDB_GLOBAL_OPTIONS: 2281 err = br_vlan_rtm_process_global_options(dev, attr, 2282 nlh->nlmsg_type, 2283 extack); 2284 break; 2285 default: 2286 continue; 2287 } 2288 2289 vlans++; 2290 if (err) 2291 break; 2292 } 2293 if (!vlans) { 2294 NL_SET_ERR_MSG_MOD(extack, "No vlans found to process"); 2295 err = -EINVAL; 2296 } 2297 2298 return err; 2299 } 2300 2301 void br_vlan_rtnl_init(void) 2302 { 2303 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL, 2304 br_vlan_rtm_dump, 0); 2305 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN, 2306 br_vlan_rtm_process, NULL, 0); 2307 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN, 2308 br_vlan_rtm_process, NULL, 0); 2309 } 2310 2311 void br_vlan_rtnl_uninit(void) 2312 { 2313 rtnl_unregister(PF_BRIDGE, RTM_GETVLAN); 2314 rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN); 2315 rtnl_unregister(PF_BRIDGE, RTM_DELVLAN); 2316 } 2317