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