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