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_add_local(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 int err; 408 409 __vlan_delete_pvid(vg, vg->pvid); 410 list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) { 411 /* take care of disjoint ranges */ 412 if (!v_start) { 413 v_start = vlan->vid; 414 } else if (vlan->vid - v_end != 1) { 415 /* found range end, notify and start next one */ 416 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN); 417 v_start = vlan->vid; 418 } 419 v_end = vlan->vid; 420 421 err = __vlan_del(vlan); 422 if (err) { 423 br_err(br, 424 "port %u(%s) failed to delete vlan %d: %pe\n", 425 (unsigned int) p->port_no, p->dev->name, 426 vlan->vid, ERR_PTR(err)); 427 } 428 } 429 430 /* notify about the last/whole vlan range */ 431 if (v_start) 432 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN); 433 } 434 435 struct sk_buff *br_handle_vlan(struct net_bridge *br, 436 const struct net_bridge_port *p, 437 struct net_bridge_vlan_group *vg, 438 struct sk_buff *skb) 439 { 440 struct pcpu_sw_netstats *stats; 441 struct net_bridge_vlan *v; 442 u16 vid; 443 444 /* If this packet was not filtered at input, let it pass */ 445 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 446 goto out; 447 448 /* At this point, we know that the frame was filtered and contains 449 * a valid vlan id. If the vlan id has untagged flag set, 450 * send untagged; otherwise, send tagged. 451 */ 452 br_vlan_get_tag(skb, &vid); 453 v = br_vlan_find(vg, vid); 454 /* Vlan entry must be configured at this point. The 455 * only exception is the bridge is set in promisc mode and the 456 * packet is destined for the bridge device. In this case 457 * pass the packet as is. 458 */ 459 if (!v || !br_vlan_should_use(v)) { 460 if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) { 461 goto out; 462 } else { 463 kfree_skb(skb); 464 return NULL; 465 } 466 } 467 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 468 stats = this_cpu_ptr(v->stats); 469 u64_stats_update_begin(&stats->syncp); 470 stats->tx_bytes += skb->len; 471 stats->tx_packets++; 472 u64_stats_update_end(&stats->syncp); 473 } 474 475 /* If the skb will be sent using forwarding offload, the assumption is 476 * that the switchdev will inject the packet into hardware together 477 * with the bridge VLAN, so that it can be forwarded according to that 478 * VLAN. The switchdev should deal with popping the VLAN header in 479 * hardware on each egress port as appropriate. So only strip the VLAN 480 * header if forwarding offload is not being used. 481 */ 482 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED && 483 !br_switchdev_frame_uses_tx_fwd_offload(skb)) 484 __vlan_hwaccel_clear_tag(skb); 485 486 if (p && (p->flags & BR_VLAN_TUNNEL) && 487 br_handle_egress_vlan_tunnel(skb, v)) { 488 kfree_skb(skb); 489 return NULL; 490 } 491 out: 492 return skb; 493 } 494 495 /* Called under RCU */ 496 static bool __allowed_ingress(const struct net_bridge *br, 497 struct net_bridge_vlan_group *vg, 498 struct sk_buff *skb, u16 *vid, 499 u8 *state, 500 struct net_bridge_vlan **vlan) 501 { 502 struct pcpu_sw_netstats *stats; 503 struct net_bridge_vlan *v; 504 bool tagged; 505 506 BR_INPUT_SKB_CB(skb)->vlan_filtered = true; 507 /* If vlan tx offload is disabled on bridge device and frame was 508 * sent from vlan device on the bridge device, it does not have 509 * HW accelerated vlan tag. 510 */ 511 if (unlikely(!skb_vlan_tag_present(skb) && 512 skb->protocol == br->vlan_proto)) { 513 skb = skb_vlan_untag(skb); 514 if (unlikely(!skb)) 515 return false; 516 } 517 518 if (!br_vlan_get_tag(skb, vid)) { 519 /* Tagged frame */ 520 if (skb->vlan_proto != br->vlan_proto) { 521 /* Protocol-mismatch, empty out vlan_tci for new tag */ 522 skb_push(skb, ETH_HLEN); 523 skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, 524 skb_vlan_tag_get(skb)); 525 if (unlikely(!skb)) 526 return false; 527 528 skb_pull(skb, ETH_HLEN); 529 skb_reset_mac_len(skb); 530 *vid = 0; 531 tagged = false; 532 } else { 533 tagged = true; 534 } 535 } else { 536 /* Untagged frame */ 537 tagged = false; 538 } 539 540 if (!*vid) { 541 u16 pvid = br_get_pvid(vg); 542 543 /* Frame had a tag with VID 0 or did not have a tag. 544 * See if pvid is set on this port. That tells us which 545 * vlan untagged or priority-tagged traffic belongs to. 546 */ 547 if (!pvid) 548 goto drop; 549 550 /* PVID is set on this port. Any untagged or priority-tagged 551 * ingress frame is considered to belong to this vlan. 552 */ 553 *vid = pvid; 554 if (likely(!tagged)) 555 /* Untagged Frame. */ 556 __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid); 557 else 558 /* Priority-tagged Frame. 559 * At this point, we know that skb->vlan_tci VID 560 * field was 0. 561 * We update only VID field and preserve PCP field. 562 */ 563 skb->vlan_tci |= pvid; 564 565 /* if snooping and stats are disabled we can avoid the lookup */ 566 if (!br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && 567 !br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 568 if (*state == BR_STATE_FORWARDING) { 569 *state = br_vlan_get_pvid_state(vg); 570 if (!br_vlan_state_allowed(*state, true)) 571 goto drop; 572 } 573 return true; 574 } 575 } 576 v = br_vlan_find(vg, *vid); 577 if (!v || !br_vlan_should_use(v)) 578 goto drop; 579 580 if (*state == BR_STATE_FORWARDING) { 581 *state = br_vlan_get_state(v); 582 if (!br_vlan_state_allowed(*state, true)) 583 goto drop; 584 } 585 586 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { 587 stats = this_cpu_ptr(v->stats); 588 u64_stats_update_begin(&stats->syncp); 589 stats->rx_bytes += skb->len; 590 stats->rx_packets++; 591 u64_stats_update_end(&stats->syncp); 592 } 593 594 *vlan = v; 595 596 return true; 597 598 drop: 599 kfree_skb(skb); 600 return false; 601 } 602 603 bool br_allowed_ingress(const struct net_bridge *br, 604 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 605 u16 *vid, u8 *state, 606 struct net_bridge_vlan **vlan) 607 { 608 /* If VLAN filtering is disabled on the bridge, all packets are 609 * permitted. 610 */ 611 *vlan = NULL; 612 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) { 613 BR_INPUT_SKB_CB(skb)->vlan_filtered = false; 614 return true; 615 } 616 617 return __allowed_ingress(br, vg, skb, vid, state, vlan); 618 } 619 620 /* Called under RCU. */ 621 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 622 const struct sk_buff *skb) 623 { 624 const struct net_bridge_vlan *v; 625 u16 vid; 626 627 /* If this packet was not filtered at input, let it pass */ 628 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 629 return true; 630 631 br_vlan_get_tag(skb, &vid); 632 v = br_vlan_find(vg, vid); 633 if (v && br_vlan_should_use(v) && 634 br_vlan_state_allowed(br_vlan_get_state(v), false)) 635 return true; 636 637 return false; 638 } 639 640 /* Called under RCU */ 641 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid) 642 { 643 struct net_bridge_vlan_group *vg; 644 struct net_bridge *br = p->br; 645 struct net_bridge_vlan *v; 646 647 /* If filtering was disabled at input, let it pass. */ 648 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 649 return true; 650 651 vg = nbp_vlan_group_rcu(p); 652 if (!vg || !vg->num_vlans) 653 return false; 654 655 if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto) 656 *vid = 0; 657 658 if (!*vid) { 659 *vid = br_get_pvid(vg); 660 if (!*vid || 661 !br_vlan_state_allowed(br_vlan_get_pvid_state(vg), true)) 662 return false; 663 664 return true; 665 } 666 667 v = br_vlan_find(vg, *vid); 668 if (v && br_vlan_state_allowed(br_vlan_get_state(v), true)) 669 return true; 670 671 return false; 672 } 673 674 static int br_vlan_add_existing(struct net_bridge *br, 675 struct net_bridge_vlan_group *vg, 676 struct net_bridge_vlan *vlan, 677 u16 flags, bool *changed, 678 struct netlink_ext_ack *extack) 679 { 680 int err; 681 682 err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack); 683 if (err && err != -EOPNOTSUPP) 684 return err; 685 686 if (!br_vlan_is_brentry(vlan)) { 687 /* Trying to change flags of non-existent bridge vlan */ 688 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) { 689 err = -EINVAL; 690 goto err_flags; 691 } 692 /* It was only kept for port vlans, now make it real */ 693 err = br_fdb_add_local(br, NULL, br->dev->dev_addr, vlan->vid); 694 if (err) { 695 br_err(br, "failed to insert local address into bridge forwarding table\n"); 696 goto err_fdb_insert; 697 } 698 699 refcount_inc(&vlan->refcnt); 700 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY; 701 vg->num_vlans++; 702 *changed = true; 703 br_multicast_toggle_one_vlan(vlan, true); 704 } 705 706 if (__vlan_add_flags(vlan, flags)) 707 *changed = true; 708 709 return 0; 710 711 err_fdb_insert: 712 err_flags: 713 br_switchdev_port_vlan_del(br->dev, vlan->vid); 714 return err; 715 } 716 717 /* Must be protected by RTNL. 718 * Must be called with vid in range from 1 to 4094 inclusive. 719 * changed must be true only if the vlan was created or updated 720 */ 721 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed, 722 struct netlink_ext_ack *extack) 723 { 724 struct net_bridge_vlan_group *vg; 725 struct net_bridge_vlan *vlan; 726 int ret; 727 728 ASSERT_RTNL(); 729 730 *changed = false; 731 vg = br_vlan_group(br); 732 vlan = br_vlan_find(vg, vid); 733 if (vlan) 734 return br_vlan_add_existing(br, vg, vlan, flags, changed, 735 extack); 736 737 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 738 if (!vlan) 739 return -ENOMEM; 740 741 vlan->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 742 if (!vlan->stats) { 743 kfree(vlan); 744 return -ENOMEM; 745 } 746 vlan->vid = vid; 747 vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER; 748 vlan->flags &= ~BRIDGE_VLAN_INFO_PVID; 749 vlan->br = br; 750 if (flags & BRIDGE_VLAN_INFO_BRENTRY) 751 refcount_set(&vlan->refcnt, 1); 752 ret = __vlan_add(vlan, flags, extack); 753 if (ret) { 754 free_percpu(vlan->stats); 755 kfree(vlan); 756 } else { 757 *changed = true; 758 } 759 760 return ret; 761 } 762 763 /* Must be protected by RTNL. 764 * Must be called with vid in range from 1 to 4094 inclusive. 765 */ 766 int br_vlan_delete(struct net_bridge *br, u16 vid) 767 { 768 struct net_bridge_vlan_group *vg; 769 struct net_bridge_vlan *v; 770 771 ASSERT_RTNL(); 772 773 vg = br_vlan_group(br); 774 v = br_vlan_find(vg, vid); 775 if (!v || !br_vlan_is_brentry(v)) 776 return -ENOENT; 777 778 br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid); 779 br_fdb_delete_by_port(br, NULL, vid, 0); 780 781 vlan_tunnel_info_del(vg, v); 782 783 return __vlan_del(v); 784 } 785 786 void br_vlan_flush(struct net_bridge *br) 787 { 788 struct net_bridge_vlan_group *vg; 789 790 ASSERT_RTNL(); 791 792 vg = br_vlan_group(br); 793 __vlan_flush(br, NULL, vg); 794 RCU_INIT_POINTER(br->vlgrp, NULL); 795 synchronize_rcu(); 796 __vlan_group_free(vg); 797 } 798 799 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid) 800 { 801 if (!vg) 802 return NULL; 803 804 return br_vlan_lookup(&vg->vlan_hash, vid); 805 } 806 807 /* Must be protected by RTNL. */ 808 static void recalculate_group_addr(struct net_bridge *br) 809 { 810 if (br_opt_get(br, BROPT_GROUP_ADDR_SET)) 811 return; 812 813 spin_lock_bh(&br->lock); 814 if (!br_opt_get(br, BROPT_VLAN_ENABLED) || 815 br->vlan_proto == htons(ETH_P_8021Q)) { 816 /* Bridge Group Address */ 817 br->group_addr[5] = 0x00; 818 } else { /* vlan_enabled && ETH_P_8021AD */ 819 /* Provider Bridge Group Address */ 820 br->group_addr[5] = 0x08; 821 } 822 spin_unlock_bh(&br->lock); 823 } 824 825 /* Must be protected by RTNL. */ 826 void br_recalculate_fwd_mask(struct net_bridge *br) 827 { 828 if (!br_opt_get(br, BROPT_VLAN_ENABLED) || 829 br->vlan_proto == htons(ETH_P_8021Q)) 830 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT; 831 else /* vlan_enabled && ETH_P_8021AD */ 832 br->group_fwd_mask_required = BR_GROUPFWD_8021AD & 833 ~(1u << br->group_addr[5]); 834 } 835 836 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 837 struct netlink_ext_ack *extack) 838 { 839 struct switchdev_attr attr = { 840 .orig_dev = br->dev, 841 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 842 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 843 .u.vlan_filtering = val, 844 }; 845 int err; 846 847 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val) 848 return 0; 849 850 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val); 851 852 err = switchdev_port_attr_set(br->dev, &attr, extack); 853 if (err && err != -EOPNOTSUPP) { 854 br_opt_toggle(br, BROPT_VLAN_ENABLED, !val); 855 return err; 856 } 857 858 br_manage_promisc(br); 859 recalculate_group_addr(br); 860 br_recalculate_fwd_mask(br); 861 if (!val && br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) { 862 br_info(br, "vlan filtering disabled, automatically disabling multicast vlan snooping\n"); 863 br_multicast_toggle_vlan_snooping(br, false, NULL); 864 } 865 866 return 0; 867 } 868 869 bool br_vlan_enabled(const struct net_device *dev) 870 { 871 struct net_bridge *br = netdev_priv(dev); 872 873 return br_opt_get(br, BROPT_VLAN_ENABLED); 874 } 875 EXPORT_SYMBOL_GPL(br_vlan_enabled); 876 877 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto) 878 { 879 struct net_bridge *br = netdev_priv(dev); 880 881 *p_proto = ntohs(br->vlan_proto); 882 883 return 0; 884 } 885 EXPORT_SYMBOL_GPL(br_vlan_get_proto); 886 887 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 888 struct netlink_ext_ack *extack) 889 { 890 struct switchdev_attr attr = { 891 .orig_dev = br->dev, 892 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL, 893 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 894 .u.vlan_protocol = ntohs(proto), 895 }; 896 int err = 0; 897 struct net_bridge_port *p; 898 struct net_bridge_vlan *vlan; 899 struct net_bridge_vlan_group *vg; 900 __be16 oldproto = br->vlan_proto; 901 902 if (br->vlan_proto == proto) 903 return 0; 904 905 err = switchdev_port_attr_set(br->dev, &attr, extack); 906 if (err && err != -EOPNOTSUPP) 907 return err; 908 909 /* Add VLANs for the new proto to the device filter. */ 910 list_for_each_entry(p, &br->port_list, list) { 911 vg = nbp_vlan_group(p); 912 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 913 err = vlan_vid_add(p->dev, proto, vlan->vid); 914 if (err) 915 goto err_filt; 916 } 917 } 918 919 br->vlan_proto = proto; 920 921 recalculate_group_addr(br); 922 br_recalculate_fwd_mask(br); 923 924 /* Delete VLANs for the old proto from the device filter. */ 925 list_for_each_entry(p, &br->port_list, list) { 926 vg = nbp_vlan_group(p); 927 list_for_each_entry(vlan, &vg->vlan_list, vlist) 928 vlan_vid_del(p->dev, oldproto, vlan->vid); 929 } 930 931 return 0; 932 933 err_filt: 934 attr.u.vlan_protocol = ntohs(oldproto); 935 switchdev_port_attr_set(br->dev, &attr, NULL); 936 937 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist) 938 vlan_vid_del(p->dev, proto, vlan->vid); 939 940 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 941 vg = nbp_vlan_group(p); 942 list_for_each_entry(vlan, &vg->vlan_list, vlist) 943 vlan_vid_del(p->dev, proto, vlan->vid); 944 } 945 946 return err; 947 } 948 949 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 950 struct netlink_ext_ack *extack) 951 { 952 if (!eth_type_vlan(htons(val))) 953 return -EPROTONOSUPPORT; 954 955 return __br_vlan_set_proto(br, htons(val), extack); 956 } 957 958 int br_vlan_set_stats(struct net_bridge *br, unsigned long val) 959 { 960 switch (val) { 961 case 0: 962 case 1: 963 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val); 964 break; 965 default: 966 return -EINVAL; 967 } 968 969 return 0; 970 } 971 972 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val) 973 { 974 struct net_bridge_port *p; 975 976 /* allow to change the option if there are no port vlans configured */ 977 list_for_each_entry(p, &br->port_list, list) { 978 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 979 980 if (vg->num_vlans) 981 return -EBUSY; 982 } 983 984 switch (val) { 985 case 0: 986 case 1: 987 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val); 988 break; 989 default: 990 return -EINVAL; 991 } 992 993 return 0; 994 } 995 996 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid) 997 { 998 struct net_bridge_vlan *v; 999 1000 if (vid != vg->pvid) 1001 return false; 1002 1003 v = br_vlan_lookup(&vg->vlan_hash, vid); 1004 if (v && br_vlan_should_use(v) && 1005 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 1006 return true; 1007 1008 return false; 1009 } 1010 1011 static void br_vlan_disable_default_pvid(struct net_bridge *br) 1012 { 1013 struct net_bridge_port *p; 1014 u16 pvid = br->default_pvid; 1015 1016 /* Disable default_pvid on all ports where it is still 1017 * configured. 1018 */ 1019 if (vlan_default_pvid(br_vlan_group(br), pvid)) { 1020 if (!br_vlan_delete(br, pvid)) 1021 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); 1022 } 1023 1024 list_for_each_entry(p, &br->port_list, list) { 1025 if (vlan_default_pvid(nbp_vlan_group(p), pvid) && 1026 !nbp_vlan_delete(p, pvid)) 1027 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); 1028 } 1029 1030 br->default_pvid = 0; 1031 } 1032 1033 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1034 struct netlink_ext_ack *extack) 1035 { 1036 const struct net_bridge_vlan *pvent; 1037 struct net_bridge_vlan_group *vg; 1038 struct net_bridge_port *p; 1039 unsigned long *changed; 1040 bool vlchange; 1041 u16 old_pvid; 1042 int err = 0; 1043 1044 if (!pvid) { 1045 br_vlan_disable_default_pvid(br); 1046 return 0; 1047 } 1048 1049 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL); 1050 if (!changed) 1051 return -ENOMEM; 1052 1053 old_pvid = br->default_pvid; 1054 1055 /* Update default_pvid config only if we do not conflict with 1056 * user configuration. 1057 */ 1058 vg = br_vlan_group(br); 1059 pvent = br_vlan_find(vg, pvid); 1060 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) && 1061 (!pvent || !br_vlan_should_use(pvent))) { 1062 err = br_vlan_add(br, pvid, 1063 BRIDGE_VLAN_INFO_PVID | 1064 BRIDGE_VLAN_INFO_UNTAGGED | 1065 BRIDGE_VLAN_INFO_BRENTRY, 1066 &vlchange, extack); 1067 if (err) 1068 goto out; 1069 1070 if (br_vlan_delete(br, old_pvid)) 1071 br_vlan_notify(br, NULL, old_pvid, 0, RTM_DELVLAN); 1072 br_vlan_notify(br, NULL, pvid, 0, RTM_NEWVLAN); 1073 __set_bit(0, changed); 1074 } 1075 1076 list_for_each_entry(p, &br->port_list, list) { 1077 /* Update default_pvid config only if we do not conflict with 1078 * user configuration. 1079 */ 1080 vg = nbp_vlan_group(p); 1081 if ((old_pvid && 1082 !vlan_default_pvid(vg, old_pvid)) || 1083 br_vlan_find(vg, pvid)) 1084 continue; 1085 1086 err = nbp_vlan_add(p, pvid, 1087 BRIDGE_VLAN_INFO_PVID | 1088 BRIDGE_VLAN_INFO_UNTAGGED, 1089 &vlchange, extack); 1090 if (err) 1091 goto err_port; 1092 if (nbp_vlan_delete(p, old_pvid)) 1093 br_vlan_notify(br, p, old_pvid, 0, RTM_DELVLAN); 1094 br_vlan_notify(p->br, p, pvid, 0, RTM_NEWVLAN); 1095 __set_bit(p->port_no, changed); 1096 } 1097 1098 br->default_pvid = pvid; 1099 1100 out: 1101 bitmap_free(changed); 1102 return err; 1103 1104 err_port: 1105 list_for_each_entry_continue_reverse(p, &br->port_list, list) { 1106 if (!test_bit(p->port_no, changed)) 1107 continue; 1108 1109 if (old_pvid) { 1110 nbp_vlan_add(p, old_pvid, 1111 BRIDGE_VLAN_INFO_PVID | 1112 BRIDGE_VLAN_INFO_UNTAGGED, 1113 &vlchange, NULL); 1114 br_vlan_notify(p->br, p, old_pvid, 0, RTM_NEWVLAN); 1115 } 1116 nbp_vlan_delete(p, pvid); 1117 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); 1118 } 1119 1120 if (test_bit(0, changed)) { 1121 if (old_pvid) { 1122 br_vlan_add(br, old_pvid, 1123 BRIDGE_VLAN_INFO_PVID | 1124 BRIDGE_VLAN_INFO_UNTAGGED | 1125 BRIDGE_VLAN_INFO_BRENTRY, 1126 &vlchange, NULL); 1127 br_vlan_notify(br, NULL, old_pvid, 0, RTM_NEWVLAN); 1128 } 1129 br_vlan_delete(br, pvid); 1130 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); 1131 } 1132 goto out; 1133 } 1134 1135 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1136 struct netlink_ext_ack *extack) 1137 { 1138 u16 pvid = val; 1139 int err = 0; 1140 1141 if (val >= VLAN_VID_MASK) 1142 return -EINVAL; 1143 1144 if (pvid == br->default_pvid) 1145 goto out; 1146 1147 /* Only allow default pvid change when filtering is disabled */ 1148 if (br_opt_get(br, BROPT_VLAN_ENABLED)) { 1149 pr_info_once("Please disable vlan filtering to change default_pvid\n"); 1150 err = -EPERM; 1151 goto out; 1152 } 1153 err = __br_vlan_set_default_pvid(br, pvid, extack); 1154 out: 1155 return err; 1156 } 1157 1158 int br_vlan_init(struct net_bridge *br) 1159 { 1160 struct net_bridge_vlan_group *vg; 1161 int ret = -ENOMEM; 1162 1163 vg = kzalloc(sizeof(*vg), GFP_KERNEL); 1164 if (!vg) 1165 goto out; 1166 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1167 if (ret) 1168 goto err_rhtbl; 1169 ret = vlan_tunnel_init(vg); 1170 if (ret) 1171 goto err_tunnel_init; 1172 INIT_LIST_HEAD(&vg->vlan_list); 1173 br->vlan_proto = htons(ETH_P_8021Q); 1174 br->default_pvid = 1; 1175 rcu_assign_pointer(br->vlgrp, vg); 1176 1177 out: 1178 return ret; 1179 1180 err_tunnel_init: 1181 rhashtable_destroy(&vg->vlan_hash); 1182 err_rhtbl: 1183 kfree(vg); 1184 1185 goto out; 1186 } 1187 1188 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack) 1189 { 1190 struct switchdev_attr attr = { 1191 .orig_dev = p->br->dev, 1192 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, 1193 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, 1194 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED), 1195 }; 1196 struct net_bridge_vlan_group *vg; 1197 int ret = -ENOMEM; 1198 1199 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); 1200 if (!vg) 1201 goto out; 1202 1203 ret = switchdev_port_attr_set(p->dev, &attr, extack); 1204 if (ret && ret != -EOPNOTSUPP) 1205 goto err_vlan_enabled; 1206 1207 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 1208 if (ret) 1209 goto err_rhtbl; 1210 ret = vlan_tunnel_init(vg); 1211 if (ret) 1212 goto err_tunnel_init; 1213 INIT_LIST_HEAD(&vg->vlan_list); 1214 rcu_assign_pointer(p->vlgrp, vg); 1215 if (p->br->default_pvid) { 1216 bool changed; 1217 1218 ret = nbp_vlan_add(p, p->br->default_pvid, 1219 BRIDGE_VLAN_INFO_PVID | 1220 BRIDGE_VLAN_INFO_UNTAGGED, 1221 &changed, extack); 1222 if (ret) 1223 goto err_vlan_add; 1224 br_vlan_notify(p->br, p, p->br->default_pvid, 0, RTM_NEWVLAN); 1225 } 1226 out: 1227 return ret; 1228 1229 err_vlan_add: 1230 RCU_INIT_POINTER(p->vlgrp, NULL); 1231 synchronize_rcu(); 1232 vlan_tunnel_deinit(vg); 1233 err_tunnel_init: 1234 rhashtable_destroy(&vg->vlan_hash); 1235 err_rhtbl: 1236 err_vlan_enabled: 1237 kfree(vg); 1238 1239 goto out; 1240 } 1241 1242 /* Must be protected by RTNL. 1243 * Must be called with vid in range from 1 to 4094 inclusive. 1244 * changed must be true only if the vlan was created or updated 1245 */ 1246 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1247 bool *changed, struct netlink_ext_ack *extack) 1248 { 1249 struct net_bridge_vlan *vlan; 1250 int ret; 1251 1252 ASSERT_RTNL(); 1253 1254 *changed = false; 1255 vlan = br_vlan_find(nbp_vlan_group(port), vid); 1256 if (vlan) { 1257 /* Pass the flags to the hardware bridge */ 1258 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack); 1259 if (ret && ret != -EOPNOTSUPP) 1260 return ret; 1261 *changed = __vlan_add_flags(vlan, flags); 1262 1263 return 0; 1264 } 1265 1266 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 1267 if (!vlan) 1268 return -ENOMEM; 1269 1270 vlan->vid = vid; 1271 vlan->port = port; 1272 ret = __vlan_add(vlan, flags, extack); 1273 if (ret) 1274 kfree(vlan); 1275 else 1276 *changed = true; 1277 1278 return ret; 1279 } 1280 1281 /* Must be protected by RTNL. 1282 * Must be called with vid in range from 1 to 4094 inclusive. 1283 */ 1284 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1285 { 1286 struct net_bridge_vlan *v; 1287 1288 ASSERT_RTNL(); 1289 1290 v = br_vlan_find(nbp_vlan_group(port), vid); 1291 if (!v) 1292 return -ENOENT; 1293 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); 1294 br_fdb_delete_by_port(port->br, port, vid, 0); 1295 1296 return __vlan_del(v); 1297 } 1298 1299 void nbp_vlan_flush(struct net_bridge_port *port) 1300 { 1301 struct net_bridge_vlan_group *vg; 1302 1303 ASSERT_RTNL(); 1304 1305 vg = nbp_vlan_group(port); 1306 __vlan_flush(port->br, port, vg); 1307 RCU_INIT_POINTER(port->vlgrp, NULL); 1308 synchronize_rcu(); 1309 __vlan_group_free(vg); 1310 } 1311 1312 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1313 struct pcpu_sw_netstats *stats) 1314 { 1315 int i; 1316 1317 memset(stats, 0, sizeof(*stats)); 1318 for_each_possible_cpu(i) { 1319 u64 rxpackets, rxbytes, txpackets, txbytes; 1320 struct pcpu_sw_netstats *cpu_stats; 1321 unsigned int start; 1322 1323 cpu_stats = per_cpu_ptr(v->stats, i); 1324 do { 1325 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 1326 rxpackets = cpu_stats->rx_packets; 1327 rxbytes = cpu_stats->rx_bytes; 1328 txbytes = cpu_stats->tx_bytes; 1329 txpackets = cpu_stats->tx_packets; 1330 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 1331 1332 stats->rx_packets += rxpackets; 1333 stats->rx_bytes += rxbytes; 1334 stats->tx_bytes += txbytes; 1335 stats->tx_packets += txpackets; 1336 } 1337 } 1338 1339 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 1340 { 1341 struct net_bridge_vlan_group *vg; 1342 struct net_bridge_port *p; 1343 1344 ASSERT_RTNL(); 1345 p = br_port_get_check_rtnl(dev); 1346 if (p) 1347 vg = nbp_vlan_group(p); 1348 else if (netif_is_bridge_master(dev)) 1349 vg = br_vlan_group(netdev_priv(dev)); 1350 else 1351 return -EINVAL; 1352 1353 *p_pvid = br_get_pvid(vg); 1354 return 0; 1355 } 1356 EXPORT_SYMBOL_GPL(br_vlan_get_pvid); 1357 1358 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) 1359 { 1360 struct net_bridge_vlan_group *vg; 1361 struct net_bridge_port *p; 1362 1363 p = br_port_get_check_rcu(dev); 1364 if (p) 1365 vg = nbp_vlan_group_rcu(p); 1366 else if (netif_is_bridge_master(dev)) 1367 vg = br_vlan_group_rcu(netdev_priv(dev)); 1368 else 1369 return -EINVAL; 1370 1371 *p_pvid = br_get_pvid(vg); 1372 return 0; 1373 } 1374 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu); 1375 1376 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1377 struct net_device_path_ctx *ctx, 1378 struct net_device_path *path) 1379 { 1380 struct net_bridge_vlan_group *vg; 1381 int idx = ctx->num_vlans - 1; 1382 u16 vid; 1383 1384 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_KEEP; 1385 1386 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 1387 return; 1388 1389 vg = br_vlan_group(br); 1390 1391 if (idx >= 0 && 1392 ctx->vlan[idx].proto == br->vlan_proto) { 1393 vid = ctx->vlan[idx].id; 1394 } else { 1395 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_TAG; 1396 vid = br_get_pvid(vg); 1397 } 1398 1399 path->bridge.vlan_id = vid; 1400 path->bridge.vlan_proto = br->vlan_proto; 1401 } 1402 1403 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1404 struct net_bridge_port *dst, 1405 struct net_device_path *path) 1406 { 1407 struct net_bridge_vlan_group *vg; 1408 struct net_bridge_vlan *v; 1409 1410 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) 1411 return 0; 1412 1413 vg = nbp_vlan_group_rcu(dst); 1414 v = br_vlan_find(vg, path->bridge.vlan_id); 1415 if (!v || !br_vlan_should_use(v)) 1416 return -EINVAL; 1417 1418 if (!(v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 1419 return 0; 1420 1421 if (path->bridge.vlan_mode == DEV_PATH_BR_VLAN_TAG) 1422 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_KEEP; 1423 else if (v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV) 1424 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_UNTAG_HW; 1425 else 1426 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_UNTAG; 1427 1428 return 0; 1429 } 1430 1431 int br_vlan_get_info(const struct net_device *dev, u16 vid, 1432 struct bridge_vlan_info *p_vinfo) 1433 { 1434 struct net_bridge_vlan_group *vg; 1435 struct net_bridge_vlan *v; 1436 struct net_bridge_port *p; 1437 1438 ASSERT_RTNL(); 1439 p = br_port_get_check_rtnl(dev); 1440 if (p) 1441 vg = nbp_vlan_group(p); 1442 else if (netif_is_bridge_master(dev)) 1443 vg = br_vlan_group(netdev_priv(dev)); 1444 else 1445 return -EINVAL; 1446 1447 v = br_vlan_find(vg, vid); 1448 if (!v) 1449 return -ENOENT; 1450 1451 p_vinfo->vid = vid; 1452 p_vinfo->flags = v->flags; 1453 if (vid == br_get_pvid(vg)) 1454 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID; 1455 return 0; 1456 } 1457 EXPORT_SYMBOL_GPL(br_vlan_get_info); 1458 1459 int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid, 1460 struct bridge_vlan_info *p_vinfo) 1461 { 1462 struct net_bridge_vlan_group *vg; 1463 struct net_bridge_vlan *v; 1464 struct net_bridge_port *p; 1465 1466 p = br_port_get_check_rcu(dev); 1467 if (p) 1468 vg = nbp_vlan_group_rcu(p); 1469 else if (netif_is_bridge_master(dev)) 1470 vg = br_vlan_group_rcu(netdev_priv(dev)); 1471 else 1472 return -EINVAL; 1473 1474 v = br_vlan_find(vg, vid); 1475 if (!v) 1476 return -ENOENT; 1477 1478 p_vinfo->vid = vid; 1479 p_vinfo->flags = v->flags; 1480 if (vid == br_get_pvid(vg)) 1481 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID; 1482 return 0; 1483 } 1484 EXPORT_SYMBOL_GPL(br_vlan_get_info_rcu); 1485 1486 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev) 1487 { 1488 return is_vlan_dev(dev) && 1489 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING); 1490 } 1491 1492 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev, 1493 __always_unused struct netdev_nested_priv *priv) 1494 { 1495 return br_vlan_is_bind_vlan_dev(dev); 1496 } 1497 1498 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev) 1499 { 1500 int found; 1501 1502 rcu_read_lock(); 1503 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn, 1504 NULL); 1505 rcu_read_unlock(); 1506 1507 return !!found; 1508 } 1509 1510 struct br_vlan_bind_walk_data { 1511 u16 vid; 1512 struct net_device *result; 1513 }; 1514 1515 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev, 1516 struct netdev_nested_priv *priv) 1517 { 1518 struct br_vlan_bind_walk_data *data = priv->data; 1519 int found = 0; 1520 1521 if (br_vlan_is_bind_vlan_dev(dev) && 1522 vlan_dev_priv(dev)->vlan_id == data->vid) { 1523 data->result = dev; 1524 found = 1; 1525 } 1526 1527 return found; 1528 } 1529 1530 static struct net_device * 1531 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid) 1532 { 1533 struct br_vlan_bind_walk_data data = { 1534 .vid = vid, 1535 }; 1536 struct netdev_nested_priv priv = { 1537 .data = (void *)&data, 1538 }; 1539 1540 rcu_read_lock(); 1541 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn, 1542 &priv); 1543 rcu_read_unlock(); 1544 1545 return data.result; 1546 } 1547 1548 static bool br_vlan_is_dev_up(const struct net_device *dev) 1549 { 1550 return !!(dev->flags & IFF_UP) && netif_oper_up(dev); 1551 } 1552 1553 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br, 1554 struct net_device *vlan_dev) 1555 { 1556 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id; 1557 struct net_bridge_vlan_group *vg; 1558 struct net_bridge_port *p; 1559 bool has_carrier = false; 1560 1561 if (!netif_carrier_ok(br->dev)) { 1562 netif_carrier_off(vlan_dev); 1563 return; 1564 } 1565 1566 list_for_each_entry(p, &br->port_list, list) { 1567 vg = nbp_vlan_group(p); 1568 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) { 1569 has_carrier = true; 1570 break; 1571 } 1572 } 1573 1574 if (has_carrier) 1575 netif_carrier_on(vlan_dev); 1576 else 1577 netif_carrier_off(vlan_dev); 1578 } 1579 1580 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p) 1581 { 1582 struct net_bridge_vlan_group *vg = nbp_vlan_group(p); 1583 struct net_bridge_vlan *vlan; 1584 struct net_device *vlan_dev; 1585 1586 list_for_each_entry(vlan, &vg->vlan_list, vlist) { 1587 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, 1588 vlan->vid); 1589 if (vlan_dev) { 1590 if (br_vlan_is_dev_up(p->dev)) { 1591 if (netif_carrier_ok(p->br->dev)) 1592 netif_carrier_on(vlan_dev); 1593 } else { 1594 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1595 } 1596 } 1597 } 1598 } 1599 1600 static void br_vlan_upper_change(struct net_device *dev, 1601 struct net_device *upper_dev, 1602 bool linking) 1603 { 1604 struct net_bridge *br = netdev_priv(dev); 1605 1606 if (!br_vlan_is_bind_vlan_dev(upper_dev)) 1607 return; 1608 1609 if (linking) { 1610 br_vlan_set_vlan_dev_state(br, upper_dev); 1611 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true); 1612 } else { 1613 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, 1614 br_vlan_has_upper_bind_vlan_dev(dev)); 1615 } 1616 } 1617 1618 struct br_vlan_link_state_walk_data { 1619 struct net_bridge *br; 1620 }; 1621 1622 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev, 1623 struct netdev_nested_priv *priv) 1624 { 1625 struct br_vlan_link_state_walk_data *data = priv->data; 1626 1627 if (br_vlan_is_bind_vlan_dev(vlan_dev)) 1628 br_vlan_set_vlan_dev_state(data->br, vlan_dev); 1629 1630 return 0; 1631 } 1632 1633 static void br_vlan_link_state_change(struct net_device *dev, 1634 struct net_bridge *br) 1635 { 1636 struct br_vlan_link_state_walk_data data = { 1637 .br = br 1638 }; 1639 struct netdev_nested_priv priv = { 1640 .data = (void *)&data, 1641 }; 1642 1643 rcu_read_lock(); 1644 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn, 1645 &priv); 1646 rcu_read_unlock(); 1647 } 1648 1649 /* Must be protected by RTNL. */ 1650 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid) 1651 { 1652 struct net_device *vlan_dev; 1653 1654 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1655 return; 1656 1657 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid); 1658 if (vlan_dev) 1659 br_vlan_set_vlan_dev_state(p->br, vlan_dev); 1660 } 1661 1662 /* Must be protected by RTNL. */ 1663 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr) 1664 { 1665 struct netdev_notifier_changeupper_info *info; 1666 struct net_bridge *br = netdev_priv(dev); 1667 int vlcmd = 0, ret = 0; 1668 bool changed = false; 1669 1670 switch (event) { 1671 case NETDEV_REGISTER: 1672 ret = br_vlan_add(br, br->default_pvid, 1673 BRIDGE_VLAN_INFO_PVID | 1674 BRIDGE_VLAN_INFO_UNTAGGED | 1675 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL); 1676 vlcmd = RTM_NEWVLAN; 1677 break; 1678 case NETDEV_UNREGISTER: 1679 changed = !br_vlan_delete(br, br->default_pvid); 1680 vlcmd = RTM_DELVLAN; 1681 break; 1682 case NETDEV_CHANGEUPPER: 1683 info = ptr; 1684 br_vlan_upper_change(dev, info->upper_dev, info->linking); 1685 break; 1686 1687 case NETDEV_CHANGE: 1688 case NETDEV_UP: 1689 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING)) 1690 break; 1691 br_vlan_link_state_change(dev, br); 1692 break; 1693 } 1694 if (changed) 1695 br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd); 1696 1697 return ret; 1698 } 1699 1700 /* Must be protected by RTNL. */ 1701 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event) 1702 { 1703 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) 1704 return; 1705 1706 switch (event) { 1707 case NETDEV_CHANGE: 1708 case NETDEV_DOWN: 1709 case NETDEV_UP: 1710 br_vlan_set_all_vlan_dev_state(p); 1711 break; 1712 } 1713 } 1714 1715 static bool br_vlan_stats_fill(struct sk_buff *skb, 1716 const struct net_bridge_vlan *v) 1717 { 1718 struct pcpu_sw_netstats stats; 1719 struct nlattr *nest; 1720 1721 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_STATS); 1722 if (!nest) 1723 return false; 1724 1725 br_vlan_get_stats(v, &stats); 1726 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES, stats.rx_bytes, 1727 BRIDGE_VLANDB_STATS_PAD) || 1728 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_PACKETS, 1729 stats.rx_packets, BRIDGE_VLANDB_STATS_PAD) || 1730 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES, stats.tx_bytes, 1731 BRIDGE_VLANDB_STATS_PAD) || 1732 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_PACKETS, 1733 stats.tx_packets, BRIDGE_VLANDB_STATS_PAD)) 1734 goto out_err; 1735 1736 nla_nest_end(skb, nest); 1737 1738 return true; 1739 1740 out_err: 1741 nla_nest_cancel(skb, nest); 1742 return false; 1743 } 1744 1745 /* v_opts is used to dump the options which must be equal in the whole range */ 1746 static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range, 1747 const struct net_bridge_vlan *v_opts, 1748 u16 flags, 1749 bool dump_stats) 1750 { 1751 struct bridge_vlan_info info; 1752 struct nlattr *nest; 1753 1754 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY); 1755 if (!nest) 1756 return false; 1757 1758 memset(&info, 0, sizeof(info)); 1759 info.vid = vid; 1760 if (flags & BRIDGE_VLAN_INFO_UNTAGGED) 1761 info.flags |= BRIDGE_VLAN_INFO_UNTAGGED; 1762 if (flags & BRIDGE_VLAN_INFO_PVID) 1763 info.flags |= BRIDGE_VLAN_INFO_PVID; 1764 1765 if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info)) 1766 goto out_err; 1767 1768 if (vid_range && vid < vid_range && 1769 !(flags & BRIDGE_VLAN_INFO_PVID) && 1770 nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range)) 1771 goto out_err; 1772 1773 if (v_opts) { 1774 if (!br_vlan_opts_fill(skb, v_opts)) 1775 goto out_err; 1776 1777 if (dump_stats && !br_vlan_stats_fill(skb, v_opts)) 1778 goto out_err; 1779 } 1780 1781 nla_nest_end(skb, nest); 1782 1783 return true; 1784 1785 out_err: 1786 nla_nest_cancel(skb, nest); 1787 return false; 1788 } 1789 1790 static size_t rtnl_vlan_nlmsg_size(void) 1791 { 1792 return NLMSG_ALIGN(sizeof(struct br_vlan_msg)) 1793 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */ 1794 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */ 1795 + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */ 1796 + br_vlan_opts_nl_size(); /* bridge vlan options */ 1797 } 1798 1799 void br_vlan_notify(const struct net_bridge *br, 1800 const struct net_bridge_port *p, 1801 u16 vid, u16 vid_range, 1802 int cmd) 1803 { 1804 struct net_bridge_vlan_group *vg; 1805 struct net_bridge_vlan *v = NULL; 1806 struct br_vlan_msg *bvm; 1807 struct nlmsghdr *nlh; 1808 struct sk_buff *skb; 1809 int err = -ENOBUFS; 1810 struct net *net; 1811 u16 flags = 0; 1812 int ifindex; 1813 1814 /* right now notifications are done only with rtnl held */ 1815 ASSERT_RTNL(); 1816 1817 if (p) { 1818 ifindex = p->dev->ifindex; 1819 vg = nbp_vlan_group(p); 1820 net = dev_net(p->dev); 1821 } else { 1822 ifindex = br->dev->ifindex; 1823 vg = br_vlan_group(br); 1824 net = dev_net(br->dev); 1825 } 1826 1827 skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL); 1828 if (!skb) 1829 goto out_err; 1830 1831 err = -EMSGSIZE; 1832 nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0); 1833 if (!nlh) 1834 goto out_err; 1835 bvm = nlmsg_data(nlh); 1836 memset(bvm, 0, sizeof(*bvm)); 1837 bvm->family = AF_BRIDGE; 1838 bvm->ifindex = ifindex; 1839 1840 switch (cmd) { 1841 case RTM_NEWVLAN: 1842 /* need to find the vlan due to flags/options */ 1843 v = br_vlan_find(vg, vid); 1844 if (!v || !br_vlan_should_use(v)) 1845 goto out_kfree; 1846 1847 flags = v->flags; 1848 if (br_get_pvid(vg) == v->vid) 1849 flags |= BRIDGE_VLAN_INFO_PVID; 1850 break; 1851 case RTM_DELVLAN: 1852 break; 1853 default: 1854 goto out_kfree; 1855 } 1856 1857 if (!br_vlan_fill_vids(skb, vid, vid_range, v, flags, false)) 1858 goto out_err; 1859 1860 nlmsg_end(skb, nlh); 1861 rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL); 1862 return; 1863 1864 out_err: 1865 rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err); 1866 out_kfree: 1867 kfree_skb(skb); 1868 } 1869 1870 /* check if v_curr can enter a range ending in range_end */ 1871 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1872 const struct net_bridge_vlan *range_end) 1873 { 1874 return v_curr->vid - range_end->vid == 1 && 1875 range_end->flags == v_curr->flags && 1876 br_vlan_opts_eq_range(v_curr, range_end); 1877 } 1878 1879 static int br_vlan_dump_dev(const struct net_device *dev, 1880 struct sk_buff *skb, 1881 struct netlink_callback *cb, 1882 u32 dump_flags) 1883 { 1884 struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL; 1885 bool dump_global = !!(dump_flags & BRIDGE_VLANDB_DUMPF_GLOBAL); 1886 bool dump_stats = !!(dump_flags & BRIDGE_VLANDB_DUMPF_STATS); 1887 struct net_bridge_vlan_group *vg; 1888 int idx = 0, s_idx = cb->args[1]; 1889 struct nlmsghdr *nlh = NULL; 1890 struct net_bridge_port *p; 1891 struct br_vlan_msg *bvm; 1892 struct net_bridge *br; 1893 int err = 0; 1894 u16 pvid; 1895 1896 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) 1897 return -EINVAL; 1898 1899 if (netif_is_bridge_master(dev)) { 1900 br = netdev_priv(dev); 1901 vg = br_vlan_group_rcu(br); 1902 p = NULL; 1903 } else { 1904 /* global options are dumped only for bridge devices */ 1905 if (dump_global) 1906 return 0; 1907 1908 p = br_port_get_rcu(dev); 1909 if (WARN_ON(!p)) 1910 return -EINVAL; 1911 vg = nbp_vlan_group_rcu(p); 1912 br = p->br; 1913 } 1914 1915 if (!vg) 1916 return 0; 1917 1918 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 1919 RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI); 1920 if (!nlh) 1921 return -EMSGSIZE; 1922 bvm = nlmsg_data(nlh); 1923 memset(bvm, 0, sizeof(*bvm)); 1924 bvm->family = PF_BRIDGE; 1925 bvm->ifindex = dev->ifindex; 1926 pvid = br_get_pvid(vg); 1927 1928 /* idx must stay at range's beginning until it is filled in */ 1929 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { 1930 if (!dump_global && !br_vlan_should_use(v)) 1931 continue; 1932 if (idx < s_idx) { 1933 idx++; 1934 continue; 1935 } 1936 1937 if (!range_start) { 1938 range_start = v; 1939 range_end = v; 1940 continue; 1941 } 1942 1943 if (dump_global) { 1944 if (br_vlan_global_opts_can_enter_range(v, range_end)) 1945 goto update_end; 1946 if (!br_vlan_global_opts_fill(skb, range_start->vid, 1947 range_end->vid, 1948 range_start)) { 1949 err = -EMSGSIZE; 1950 break; 1951 } 1952 /* advance number of filled vlans */ 1953 idx += range_end->vid - range_start->vid + 1; 1954 1955 range_start = v; 1956 } else if (dump_stats || v->vid == pvid || 1957 !br_vlan_can_enter_range(v, range_end)) { 1958 u16 vlan_flags = br_vlan_flags(range_start, pvid); 1959 1960 if (!br_vlan_fill_vids(skb, range_start->vid, 1961 range_end->vid, range_start, 1962 vlan_flags, dump_stats)) { 1963 err = -EMSGSIZE; 1964 break; 1965 } 1966 /* advance number of filled vlans */ 1967 idx += range_end->vid - range_start->vid + 1; 1968 1969 range_start = v; 1970 } 1971 update_end: 1972 range_end = v; 1973 } 1974 1975 /* err will be 0 and range_start will be set in 3 cases here: 1976 * - first vlan (range_start == range_end) 1977 * - last vlan (range_start == range_end, not in range) 1978 * - last vlan range (range_start != range_end, in range) 1979 */ 1980 if (!err && range_start) { 1981 if (dump_global && 1982 !br_vlan_global_opts_fill(skb, range_start->vid, 1983 range_end->vid, range_start)) 1984 err = -EMSGSIZE; 1985 else if (!dump_global && 1986 !br_vlan_fill_vids(skb, range_start->vid, 1987 range_end->vid, range_start, 1988 br_vlan_flags(range_start, pvid), 1989 dump_stats)) 1990 err = -EMSGSIZE; 1991 } 1992 1993 cb->args[1] = err ? idx : 0; 1994 1995 nlmsg_end(skb, nlh); 1996 1997 return err; 1998 } 1999 2000 static const struct nla_policy br_vlan_db_dump_pol[BRIDGE_VLANDB_DUMP_MAX + 1] = { 2001 [BRIDGE_VLANDB_DUMP_FLAGS] = { .type = NLA_U32 }, 2002 }; 2003 2004 static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb) 2005 { 2006 struct nlattr *dtb[BRIDGE_VLANDB_DUMP_MAX + 1]; 2007 int idx = 0, err = 0, s_idx = cb->args[0]; 2008 struct net *net = sock_net(skb->sk); 2009 struct br_vlan_msg *bvm; 2010 struct net_device *dev; 2011 u32 dump_flags = 0; 2012 2013 err = nlmsg_parse(cb->nlh, sizeof(*bvm), dtb, BRIDGE_VLANDB_DUMP_MAX, 2014 br_vlan_db_dump_pol, cb->extack); 2015 if (err < 0) 2016 return err; 2017 2018 bvm = nlmsg_data(cb->nlh); 2019 if (dtb[BRIDGE_VLANDB_DUMP_FLAGS]) 2020 dump_flags = nla_get_u32(dtb[BRIDGE_VLANDB_DUMP_FLAGS]); 2021 2022 rcu_read_lock(); 2023 if (bvm->ifindex) { 2024 dev = dev_get_by_index_rcu(net, bvm->ifindex); 2025 if (!dev) { 2026 err = -ENODEV; 2027 goto out_err; 2028 } 2029 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 2030 /* if the dump completed without an error we return 0 here */ 2031 if (err != -EMSGSIZE) 2032 goto out_err; 2033 } else { 2034 for_each_netdev_rcu(net, dev) { 2035 if (idx < s_idx) 2036 goto skip; 2037 2038 err = br_vlan_dump_dev(dev, skb, cb, dump_flags); 2039 if (err == -EMSGSIZE) 2040 break; 2041 skip: 2042 idx++; 2043 } 2044 } 2045 cb->args[0] = idx; 2046 rcu_read_unlock(); 2047 2048 return skb->len; 2049 2050 out_err: 2051 rcu_read_unlock(); 2052 2053 return err; 2054 } 2055 2056 static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = { 2057 [BRIDGE_VLANDB_ENTRY_INFO] = 2058 NLA_POLICY_EXACT_LEN(sizeof(struct bridge_vlan_info)), 2059 [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 }, 2060 [BRIDGE_VLANDB_ENTRY_STATE] = { .type = NLA_U8 }, 2061 [BRIDGE_VLANDB_ENTRY_TUNNEL_INFO] = { .type = NLA_NESTED }, 2062 [BRIDGE_VLANDB_ENTRY_MCAST_ROUTER] = { .type = NLA_U8 }, 2063 }; 2064 2065 static int br_vlan_rtm_process_one(struct net_device *dev, 2066 const struct nlattr *attr, 2067 int cmd, struct netlink_ext_ack *extack) 2068 { 2069 struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL; 2070 struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1]; 2071 bool changed = false, skip_processing = false; 2072 struct net_bridge_vlan_group *vg; 2073 struct net_bridge_port *p = NULL; 2074 int err = 0, cmdmap = 0; 2075 struct net_bridge *br; 2076 2077 if (netif_is_bridge_master(dev)) { 2078 br = netdev_priv(dev); 2079 vg = br_vlan_group(br); 2080 } else { 2081 p = br_port_get_rtnl(dev); 2082 if (WARN_ON(!p)) 2083 return -ENODEV; 2084 br = p->br; 2085 vg = nbp_vlan_group(p); 2086 } 2087 2088 if (WARN_ON(!vg)) 2089 return -ENODEV; 2090 2091 err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr, 2092 br_vlan_db_policy, extack); 2093 if (err) 2094 return err; 2095 2096 if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) { 2097 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info"); 2098 return -EINVAL; 2099 } 2100 memset(&vrange_end, 0, sizeof(vrange_end)); 2101 2102 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]); 2103 if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 2104 BRIDGE_VLAN_INFO_RANGE_END)) { 2105 NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls"); 2106 return -EINVAL; 2107 } 2108 if (!br_vlan_valid_id(vinfo->vid, extack)) 2109 return -EINVAL; 2110 2111 if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) { 2112 vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]); 2113 /* validate user-provided flags without RANGE_BEGIN */ 2114 vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags; 2115 vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; 2116 2117 /* vinfo_last is the range start, vinfo the range end */ 2118 vinfo_last = vinfo; 2119 vinfo = &vrange_end; 2120 2121 if (!br_vlan_valid_id(vinfo->vid, extack) || 2122 !br_vlan_valid_range(vinfo, vinfo_last, extack)) 2123 return -EINVAL; 2124 } 2125 2126 switch (cmd) { 2127 case RTM_NEWVLAN: 2128 cmdmap = RTM_SETLINK; 2129 skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS); 2130 break; 2131 case RTM_DELVLAN: 2132 cmdmap = RTM_DELLINK; 2133 break; 2134 } 2135 2136 if (!skip_processing) { 2137 struct bridge_vlan_info *tmp_last = vinfo_last; 2138 2139 /* br_process_vlan_info may overwrite vinfo_last */ 2140 err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last, 2141 &changed, extack); 2142 2143 /* notify first if anything changed */ 2144 if (changed) 2145 br_ifinfo_notify(cmdmap, br, p); 2146 2147 if (err) 2148 return err; 2149 } 2150 2151 /* deal with options */ 2152 if (cmd == RTM_NEWVLAN) { 2153 struct net_bridge_vlan *range_start, *range_end; 2154 2155 if (vinfo_last) { 2156 range_start = br_vlan_find(vg, vinfo_last->vid); 2157 range_end = br_vlan_find(vg, vinfo->vid); 2158 } else { 2159 range_start = br_vlan_find(vg, vinfo->vid); 2160 range_end = range_start; 2161 } 2162 2163 err = br_vlan_process_options(br, p, range_start, range_end, 2164 tb, extack); 2165 } 2166 2167 return err; 2168 } 2169 2170 static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh, 2171 struct netlink_ext_ack *extack) 2172 { 2173 struct net *net = sock_net(skb->sk); 2174 struct br_vlan_msg *bvm; 2175 struct net_device *dev; 2176 struct nlattr *attr; 2177 int err, vlans = 0; 2178 int rem; 2179 2180 /* this should validate the header and check for remaining bytes */ 2181 err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL, 2182 extack); 2183 if (err < 0) 2184 return err; 2185 2186 bvm = nlmsg_data(nlh); 2187 dev = __dev_get_by_index(net, bvm->ifindex); 2188 if (!dev) 2189 return -ENODEV; 2190 2191 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) { 2192 NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port"); 2193 return -EINVAL; 2194 } 2195 2196 nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) { 2197 switch (nla_type(attr)) { 2198 case BRIDGE_VLANDB_ENTRY: 2199 err = br_vlan_rtm_process_one(dev, attr, 2200 nlh->nlmsg_type, 2201 extack); 2202 break; 2203 case BRIDGE_VLANDB_GLOBAL_OPTIONS: 2204 err = br_vlan_rtm_process_global_options(dev, attr, 2205 nlh->nlmsg_type, 2206 extack); 2207 break; 2208 default: 2209 continue; 2210 } 2211 2212 vlans++; 2213 if (err) 2214 break; 2215 } 2216 if (!vlans) { 2217 NL_SET_ERR_MSG_MOD(extack, "No vlans found to process"); 2218 err = -EINVAL; 2219 } 2220 2221 return err; 2222 } 2223 2224 void br_vlan_rtnl_init(void) 2225 { 2226 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL, 2227 br_vlan_rtm_dump, 0); 2228 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN, 2229 br_vlan_rtm_process, NULL, 0); 2230 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN, 2231 br_vlan_rtm_process, NULL, 0); 2232 } 2233 2234 void br_vlan_rtnl_uninit(void) 2235 { 2236 rtnl_unregister(PF_BRIDGE, RTM_GETVLAN); 2237 rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN); 2238 rtnl_unregister(PF_BRIDGE, RTM_DELVLAN); 2239 } 2240