net/bridge/br_vlan.c

   1 #include <linux/kernel.h>
   2 #include <linux/netdevice.h>
   3 #include <linux/rtnetlink.h>
   4 #include <linux/slab.h>
   5 #include <net/switchdev.h>
   6
   7 #include "br_private.h"
   8 #include "br_private_tunnel.h"
   9
  10 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid);
  11
  12 static inline int br_vlan_cmp(struct rhashtable_compare_arg *arg,
  13                               const void *ptr)
  14 {
  15         const struct net_bridge_vlan *vle = ptr;
  16         u16 vid = *(u16 *)arg->key;
  17
  18         return vle->vid != vid;
  19 }
  20
  21 static const struct rhashtable_params br_vlan_rht_params = {
  22         .head_offset = offsetof(struct net_bridge_vlan, vnode),
  23         .key_offset = offsetof(struct net_bridge_vlan, vid),
  24         .key_len = sizeof(u16),
  25         .nelem_hint = 3,
  26         .max_size = VLAN_N_VID,
  27         .obj_cmpfn = br_vlan_cmp,
  28         .automatic_shrinking = true,
  29 };
  30
  31 static struct net_bridge_vlan *br_vlan_lookup(struct rhashtable *tbl, u16 vid)
  32 {
  33         return rhashtable_lookup_fast(tbl, &vid, br_vlan_rht_params);
  34 }
  35
  36 static bool __vlan_add_pvid(struct net_bridge_vlan_group *vg, u16 vid)
  37 {
  38         if (vg->pvid == vid)
  39                 return false;
  40
  41         smp_wmb();
  42         vg->pvid = vid;
  43
  44         return true;
  45 }
  46
  47 static bool __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid)
  48 {
  49         if (vg->pvid != vid)
  50                 return false;
  51
  52         smp_wmb();
  53         vg->pvid = 0;
  54
  55         return true;
  56 }
  57
  58 /* return true if anything changed, false otherwise */
  59 static bool __vlan_add_flags(struct net_bridge_vlan *v, u16 flags)
  60 {
  61         struct net_bridge_vlan_group *vg;
  62         u16 old_flags = v->flags;
  63         bool ret;
  64
  65         if (br_vlan_is_master(v))
  66                 vg = br_vlan_group(v->br);
  67         else
  68                 vg = nbp_vlan_group(v->port);
  69
  70         if (flags & BRIDGE_VLAN_INFO_PVID)
  71                 ret = __vlan_add_pvid(vg, v->vid);
  72         else
  73                 ret = __vlan_delete_pvid(vg, v->vid);
  74
  75         if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
  76                 v->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
  77         else
  78                 v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED;
  79
  80         return ret || !!(old_flags ^ v->flags);
  81 }
  82
  83 static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br,
  84                           struct net_bridge_vlan *v, u16 flags,
  85                           struct netlink_ext_ack *extack)
  86 {
  87         int err;
  88
  89         /* Try switchdev op first. In case it is not supported, fallback to
  90          * 8021q add.
  91          */
  92         err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
  93         if (err == -EOPNOTSUPP)
  94                 return vlan_vid_add(dev, br->vlan_proto, v->vid);
  95         v->priv_flags |= BR_VLFLAG_ADDED_BY_SWITCHDEV;
  96         return err;
  97 }
  98
  99 static void __vlan_add_list(struct net_bridge_vlan *v)
 100 {
 101         struct net_bridge_vlan_group *vg;
 102         struct list_head *headp, *hpos;
 103         struct net_bridge_vlan *vent;
 104
 105         if (br_vlan_is_master(v))
 106                 vg = br_vlan_group(v->br);
 107         else
 108                 vg = nbp_vlan_group(v->port);
 109
 110         headp = &vg->vlan_list;
 111         list_for_each_prev(hpos, headp) {
 112                 vent = list_entry(hpos, struct net_bridge_vlan, vlist);
 113                 if (v->vid < vent->vid)
 114                         continue;
 115                 else
 116                         break;
 117         }
 118         list_add_rcu(&v->vlist, hpos);
 119 }
 120
 121 static void __vlan_del_list(struct net_bridge_vlan *v)
 122 {
 123         list_del_rcu(&v->vlist);
 124 }
 125
 126 static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br,
 127                           const struct net_bridge_vlan *v)
 128 {
 129         int err;
 130
 131         /* Try switchdev op first. In case it is not supported, fallback to
 132          * 8021q del.
 133          */
 134         err = br_switchdev_port_vlan_del(dev, v->vid);
 135         if (!(v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV))
 136                 vlan_vid_del(dev, br->vlan_proto, v->vid);
 137         return err == -EOPNOTSUPP ? 0 : err;
 138 }
 139
 140 /* Returns a master vlan, if it didn't exist it gets created. In all cases a
 141  * a reference is taken to the master vlan before returning.
 142  */
 143 static struct net_bridge_vlan *
 144 br_vlan_get_master(struct net_bridge *br, u16 vid,
 145                    struct netlink_ext_ack *extack)
 146 {
 147         struct net_bridge_vlan_group *vg;
 148         struct net_bridge_vlan *masterv;
 149
 150         vg = br_vlan_group(br);
 151         masterv = br_vlan_find(vg, vid);
 152         if (!masterv) {
 153                 bool changed;
 154
 155                 /* missing global ctx, create it now */
 156                 if (br_vlan_add(br, vid, 0, &changed, extack))
 157                         return NULL;
 158                 masterv = br_vlan_find(vg, vid);
 159                 if (WARN_ON(!masterv))
 160                         return NULL;
 161                 refcount_set(&masterv->refcnt, 1);
 162                 return masterv;
 163         }
 164         refcount_inc(&masterv->refcnt);
 165
 166         return masterv;
 167 }
 168
 169 static void br_master_vlan_rcu_free(struct rcu_head *rcu)
 170 {
 171         struct net_bridge_vlan *v;
 172
 173         v = container_of(rcu, struct net_bridge_vlan, rcu);
 174         WARN_ON(!br_vlan_is_master(v));
 175         free_percpu(v->stats);
 176         v->stats = NULL;
 177         kfree(v);
 178 }
 179
 180 static void br_vlan_put_master(struct net_bridge_vlan *masterv)
 181 {
 182         struct net_bridge_vlan_group *vg;
 183
 184         if (!br_vlan_is_master(masterv))
 185                 return;
 186
 187         vg = br_vlan_group(masterv->br);
 188         if (refcount_dec_and_test(&masterv->refcnt)) {
 189                 rhashtable_remove_fast(&vg->vlan_hash,
 190                                        &masterv->vnode, br_vlan_rht_params);
 191                 __vlan_del_list(masterv);
 192                 call_rcu(&masterv->rcu, br_master_vlan_rcu_free);
 193         }
 194 }
 195
 196 static void nbp_vlan_rcu_free(struct rcu_head *rcu)
 197 {
 198         struct net_bridge_vlan *v;
 199
 200         v = container_of(rcu, struct net_bridge_vlan, rcu);
 201         WARN_ON(br_vlan_is_master(v));
 202         /* if we had per-port stats configured then free them here */
 203         if (v->priv_flags & BR_VLFLAG_PER_PORT_STATS)
 204                 free_percpu(v->stats);
 205         v->stats = NULL;
 206         kfree(v);
 207 }
 208
 209 /* This is the shared VLAN add function which works for both ports and bridge
 210  * devices. There are four possible calls to this function in terms of the
 211  * vlan entry type:
 212  * 1. vlan is being added on a port (no master flags, global entry exists)
 213  * 2. vlan is being added on a bridge (both master and brentry flags)
 214  * 3. vlan is being added on a port, but a global entry didn't exist which
 215  *    is being created right now (master flag set, brentry flag unset), the
 216  *    global entry is used for global per-vlan features, but not for filtering
 217  * 4. same as 3 but with both master and brentry flags set so the entry
 218  *    will be used for filtering in both the port and the bridge
 219  */
 220 static int __vlan_add(struct net_bridge_vlan *v, u16 flags,
 221                       struct netlink_ext_ack *extack)
 222 {
 223         struct net_bridge_vlan *masterv = NULL;
 224         struct net_bridge_port *p = NULL;
 225         struct net_bridge_vlan_group *vg;
 226         struct net_device *dev;
 227         struct net_bridge *br;
 228         int err;
 229
 230         if (br_vlan_is_master(v)) {
 231                 br = v->br;
 232                 dev = br->dev;
 233                 vg = br_vlan_group(br);
 234         } else {
 235                 p = v->port;
 236                 br = p->br;
 237                 dev = p->dev;
 238                 vg = nbp_vlan_group(p);
 239         }
 240
 241         if (p) {
 242                 /* Add VLAN to the device filter if it is supported.
 243                  * This ensures tagged traffic enters the bridge when
 244                  * promiscuous mode is disabled by br_manage_promisc().
 245                  */
 246                 err = __vlan_vid_add(dev, br, v, flags, extack);
 247                 if (err)
 248                         goto out;
 249
 250                 /* need to work on the master vlan too */
 251                 if (flags & BRIDGE_VLAN_INFO_MASTER) {
 252                         bool changed;
 253
 254                         err = br_vlan_add(br, v->vid,
 255                                           flags | BRIDGE_VLAN_INFO_BRENTRY,
 256                                           &changed, extack);
 257                         if (err)
 258                                 goto out_filt;
 259                 }
 260
 261                 masterv = br_vlan_get_master(br, v->vid, extack);
 262                 if (!masterv)
 263                         goto out_filt;
 264                 v->brvlan = masterv;
 265                 if (br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)) {
 266                         v->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats);
 267                         if (!v->stats) {
 268                                 err = -ENOMEM;
 269                                 goto out_filt;
 270                         }
 271                         v->priv_flags |= BR_VLFLAG_PER_PORT_STATS;
 272                 } else {
 273                         v->stats = masterv->stats;
 274                 }
 275         } else {
 276                 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
 277                 if (err && err != -EOPNOTSUPP)
 278                         goto out;
 279         }
 280
 281         /* Add the dev mac and count the vlan only if it's usable */
 282         if (br_vlan_should_use(v)) {
 283                 err = br_fdb_insert(br, p, dev->dev_addr, v->vid);
 284                 if (err) {
 285                         br_err(br, "failed insert local address into bridge forwarding table\n");
 286                         goto out_filt;
 287                 }
 288                 vg->num_vlans++;
 289         }
 290
 291         err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode,
 292                                             br_vlan_rht_params);
 293         if (err)
 294                 goto out_fdb_insert;
 295
 296         __vlan_add_list(v);
 297         __vlan_add_flags(v, flags);
 298
 299         if (p)
 300                 nbp_vlan_set_vlan_dev_state(p, v->vid);
 301 out:
 302         return err;
 303
 304 out_fdb_insert:
 305         if (br_vlan_should_use(v)) {
 306                 br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid);
 307                 vg->num_vlans--;
 308         }
 309
 310 out_filt:
 311         if (p) {
 312                 __vlan_vid_del(dev, br, v);
 313                 if (masterv) {
 314                         if (v->stats && masterv->stats != v->stats)
 315                                 free_percpu(v->stats);
 316                         v->stats = NULL;
 317
 318                         br_vlan_put_master(masterv);
 319                         v->brvlan = NULL;
 320                 }
 321         } else {
 322                 br_switchdev_port_vlan_del(dev, v->vid);
 323         }
 324
 325         goto out;
 326 }
 327
 328 static int __vlan_del(struct net_bridge_vlan *v)
 329 {
 330         struct net_bridge_vlan *masterv = v;
 331         struct net_bridge_vlan_group *vg;
 332         struct net_bridge_port *p = NULL;
 333         int err = 0;
 334
 335         if (br_vlan_is_master(v)) {
 336                 vg = br_vlan_group(v->br);
 337         } else {
 338                 p = v->port;
 339                 vg = nbp_vlan_group(v->port);
 340                 masterv = v->brvlan;
 341         }
 342
 343         __vlan_delete_pvid(vg, v->vid);
 344         if (p) {
 345                 err = __vlan_vid_del(p->dev, p->br, v);
 346                 if (err)
 347                         goto out;
 348         } else {
 349                 err = br_switchdev_port_vlan_del(v->br->dev, v->vid);
 350                 if (err && err != -EOPNOTSUPP)
 351                         goto out;
 352                 err = 0;
 353         }
 354
 355         if (br_vlan_should_use(v)) {
 356                 v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY;
 357                 vg->num_vlans--;
 358         }
 359
 360         if (masterv != v) {
 361                 vlan_tunnel_info_del(vg, v);
 362                 rhashtable_remove_fast(&vg->vlan_hash, &v->vnode,
 363                                        br_vlan_rht_params);
 364                 __vlan_del_list(v);
 365                 nbp_vlan_set_vlan_dev_state(p, v->vid);
 366                 call_rcu(&v->rcu, nbp_vlan_rcu_free);
 367         }
 368
 369         br_vlan_put_master(masterv);
 370 out:
 371         return err;
 372 }
 373
 374 static void __vlan_group_free(struct net_bridge_vlan_group *vg)
 375 {
 376         WARN_ON(!list_empty(&vg->vlan_list));
 377         rhashtable_destroy(&vg->vlan_hash);
 378         vlan_tunnel_deinit(vg);
 379         kfree(vg);
 380 }
 381
 382 static void __vlan_flush(struct net_bridge_vlan_group *vg)
 383 {
 384         struct net_bridge_vlan *vlan, *tmp;
 385
 386         __vlan_delete_pvid(vg, vg->pvid);
 387         list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist)
 388                 __vlan_del(vlan);
 389 }
 390
 391 struct sk_buff *br_handle_vlan(struct net_bridge *br,
 392                                const struct net_bridge_port *p,
 393                                struct net_bridge_vlan_group *vg,
 394                                struct sk_buff *skb)
 395 {
 396         struct br_vlan_stats *stats;
 397         struct net_bridge_vlan *v;
 398         u16 vid;
 399
 400         /* If this packet was not filtered at input, let it pass */
 401         if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
 402                 goto out;
 403
 404         /* At this point, we know that the frame was filtered and contains
 405          * a valid vlan id.  If the vlan id has untagged flag set,
 406          * send untagged; otherwise, send tagged.
 407          */
 408         br_vlan_get_tag(skb, &vid);
 409         v = br_vlan_find(vg, vid);
 410         /* Vlan entry must be configured at this point.  The
 411          * only exception is the bridge is set in promisc mode and the
 412          * packet is destined for the bridge device.  In this case
 413          * pass the packet as is.
 414          */
 415         if (!v || !br_vlan_should_use(v)) {
 416                 if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) {
 417                         goto out;
 418                 } else {
 419                         kfree_skb(skb);
 420                         return NULL;
 421                 }
 422         }
 423         if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
 424                 stats = this_cpu_ptr(v->stats);
 425                 u64_stats_update_begin(&stats->syncp);
 426                 stats->tx_bytes += skb->len;
 427                 stats->tx_packets++;
 428                 u64_stats_update_end(&stats->syncp);
 429         }
 430
 431         if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
 432                 __vlan_hwaccel_clear_tag(skb);
 433
 434         if (p && (p->flags & BR_VLAN_TUNNEL) &&
 435             br_handle_egress_vlan_tunnel(skb, v)) {
 436                 kfree_skb(skb);
 437                 return NULL;
 438         }
 439 out:
 440         return skb;
 441 }
 442
 443 /* Called under RCU */
 444 static bool __allowed_ingress(const struct net_bridge *br,
 445                               struct net_bridge_vlan_group *vg,
 446                               struct sk_buff *skb, u16 *vid)
 447 {
 448         struct br_vlan_stats *stats;
 449         struct net_bridge_vlan *v;
 450         bool tagged;
 451
 452         BR_INPUT_SKB_CB(skb)->vlan_filtered = true;
 453         /* If vlan tx offload is disabled on bridge device and frame was
 454          * sent from vlan device on the bridge device, it does not have
 455          * HW accelerated vlan tag.
 456          */
 457         if (unlikely(!skb_vlan_tag_present(skb) &&
 458                      skb->protocol == br->vlan_proto)) {
 459                 skb = skb_vlan_untag(skb);
 460                 if (unlikely(!skb))
 461                         return false;
 462         }
 463
 464         if (!br_vlan_get_tag(skb, vid)) {
 465                 /* Tagged frame */
 466                 if (skb->vlan_proto != br->vlan_proto) {
 467                         /* Protocol-mismatch, empty out vlan_tci for new tag */
 468                         skb_push(skb, ETH_HLEN);
 469                         skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto,
 470                                                         skb_vlan_tag_get(skb));
 471                         if (unlikely(!skb))
 472                                 return false;
 473
 474                         skb_pull(skb, ETH_HLEN);
 475                         skb_reset_mac_len(skb);
 476                         *vid = 0;
 477                         tagged = false;
 478                 } else {
 479                         tagged = true;
 480                 }
 481         } else {
 482                 /* Untagged frame */
 483                 tagged = false;
 484         }
 485
 486         if (!*vid) {
 487                 u16 pvid = br_get_pvid(vg);
 488
 489                 /* Frame had a tag with VID 0 or did not have a tag.
 490                  * See if pvid is set on this port.  That tells us which
 491                  * vlan untagged or priority-tagged traffic belongs to.
 492                  */
 493                 if (!pvid)
 494                         goto drop;
 495
 496                 /* PVID is set on this port.  Any untagged or priority-tagged
 497                  * ingress frame is considered to belong to this vlan.
 498                  */
 499                 *vid = pvid;
 500                 if (likely(!tagged))
 501                         /* Untagged Frame. */
 502                         __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid);
 503                 else
 504                         /* Priority-tagged Frame.
 505                          * At this point, we know that skb->vlan_tci VID
 506                          * field was 0.
 507                          * We update only VID field and preserve PCP field.
 508                          */
 509                         skb->vlan_tci |= pvid;
 510
 511                 /* if stats are disabled we can avoid the lookup */
 512                 if (!br_opt_get(br, BROPT_VLAN_STATS_ENABLED))
 513                         return true;
 514         }
 515         v = br_vlan_find(vg, *vid);
 516         if (!v || !br_vlan_should_use(v))
 517                 goto drop;
 518
 519         if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
 520                 stats = this_cpu_ptr(v->stats);
 521                 u64_stats_update_begin(&stats->syncp);
 522                 stats->rx_bytes += skb->len;
 523                 stats->rx_packets++;
 524                 u64_stats_update_end(&stats->syncp);
 525         }
 526
 527         return true;
 528
 529 drop:
 530         kfree_skb(skb);
 531         return false;
 532 }
 533
 534 bool br_allowed_ingress(const struct net_bridge *br,
 535                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
 536                         u16 *vid)
 537 {
 538         /* If VLAN filtering is disabled on the bridge, all packets are
 539          * permitted.
 540          */
 541         if (!br_opt_get(br, BROPT_VLAN_ENABLED)) {
 542                 BR_INPUT_SKB_CB(skb)->vlan_filtered = false;
 543                 return true;
 544         }
 545
 546         return __allowed_ingress(br, vg, skb, vid);
 547 }
 548
 549 /* Called under RCU. */
 550 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
 551                        const struct sk_buff *skb)
 552 {
 553         const struct net_bridge_vlan *v;
 554         u16 vid;
 555
 556         /* If this packet was not filtered at input, let it pass */
 557         if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
 558                 return true;
 559
 560         br_vlan_get_tag(skb, &vid);
 561         v = br_vlan_find(vg, vid);
 562         if (v && br_vlan_should_use(v))
 563                 return true;
 564
 565         return false;
 566 }
 567
 568 /* Called under RCU */
 569 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid)
 570 {
 571         struct net_bridge_vlan_group *vg;
 572         struct net_bridge *br = p->br;
 573
 574         /* If filtering was disabled at input, let it pass. */
 575         if (!br_opt_get(br, BROPT_VLAN_ENABLED))
 576                 return true;
 577
 578         vg = nbp_vlan_group_rcu(p);
 579         if (!vg || !vg->num_vlans)
 580                 return false;
 581
 582         if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto)
 583                 *vid = 0;
 584
 585         if (!*vid) {
 586                 *vid = br_get_pvid(vg);
 587                 if (!*vid)
 588                         return false;
 589
 590                 return true;
 591         }
 592
 593         if (br_vlan_find(vg, *vid))
 594                 return true;
 595
 596         return false;
 597 }
 598
 599 static int br_vlan_add_existing(struct net_bridge *br,
 600                                 struct net_bridge_vlan_group *vg,
 601                                 struct net_bridge_vlan *vlan,
 602                                 u16 flags, bool *changed,
 603                                 struct netlink_ext_ack *extack)
 604 {
 605         int err;
 606
 607         err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack);
 608         if (err && err != -EOPNOTSUPP)
 609                 return err;
 610
 611         if (!br_vlan_is_brentry(vlan)) {
 612                 /* Trying to change flags of non-existent bridge vlan */
 613                 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) {
 614                         err = -EINVAL;
 615                         goto err_flags;
 616                 }
 617                 /* It was only kept for port vlans, now make it real */
 618                 err = br_fdb_insert(br, NULL, br->dev->dev_addr,
 619                                     vlan->vid);
 620                 if (err) {
 621                         br_err(br, "failed to insert local address into bridge forwarding table\n");
 622                         goto err_fdb_insert;
 623                 }
 624
 625                 refcount_inc(&vlan->refcnt);
 626                 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY;
 627                 vg->num_vlans++;
 628                 *changed = true;
 629         }
 630
 631         if (__vlan_add_flags(vlan, flags))
 632                 *changed = true;
 633
 634         return 0;
 635
 636 err_fdb_insert:
 637 err_flags:
 638         br_switchdev_port_vlan_del(br->dev, vlan->vid);
 639         return err;
 640 }
 641
 642 /* Must be protected by RTNL.
 643  * Must be called with vid in range from 1 to 4094 inclusive.
 644  * changed must be true only if the vlan was created or updated
 645  */
 646 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed,
 647                 struct netlink_ext_ack *extack)
 648 {
 649         struct net_bridge_vlan_group *vg;
 650         struct net_bridge_vlan *vlan;
 651         int ret;
 652
 653         ASSERT_RTNL();
 654
 655         *changed = false;
 656         vg = br_vlan_group(br);
 657         vlan = br_vlan_find(vg, vid);
 658         if (vlan)
 659                 return br_vlan_add_existing(br, vg, vlan, flags, changed,
 660                                             extack);
 661
 662         vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
 663         if (!vlan)
 664                 return -ENOMEM;
 665
 666         vlan->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats);
 667         if (!vlan->stats) {
 668                 kfree(vlan);
 669                 return -ENOMEM;
 670         }
 671         vlan->vid = vid;
 672         vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER;
 673         vlan->flags &= ~BRIDGE_VLAN_INFO_PVID;
 674         vlan->br = br;
 675         if (flags & BRIDGE_VLAN_INFO_BRENTRY)
 676                 refcount_set(&vlan->refcnt, 1);
 677         ret = __vlan_add(vlan, flags, extack);
 678         if (ret) {
 679                 free_percpu(vlan->stats);
 680                 kfree(vlan);
 681         } else {
 682                 *changed = true;
 683         }
 684
 685         return ret;
 686 }
 687
 688 /* Must be protected by RTNL.
 689  * Must be called with vid in range from 1 to 4094 inclusive.
 690  */
 691 int br_vlan_delete(struct net_bridge *br, u16 vid)
 692 {
 693         struct net_bridge_vlan_group *vg;
 694         struct net_bridge_vlan *v;
 695
 696         ASSERT_RTNL();
 697
 698         vg = br_vlan_group(br);
 699         v = br_vlan_find(vg, vid);
 700         if (!v || !br_vlan_is_brentry(v))
 701                 return -ENOENT;
 702
 703         br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid);
 704         br_fdb_delete_by_port(br, NULL, vid, 0);
 705
 706         vlan_tunnel_info_del(vg, v);
 707
 708         return __vlan_del(v);
 709 }
 710
 711 void br_vlan_flush(struct net_bridge *br)
 712 {
 713         struct net_bridge_vlan_group *vg;
 714
 715         ASSERT_RTNL();
 716
 717         vg = br_vlan_group(br);
 718         __vlan_flush(vg);
 719         RCU_INIT_POINTER(br->vlgrp, NULL);
 720         synchronize_rcu();
 721         __vlan_group_free(vg);
 722 }
 723
 724 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid)
 725 {
 726         if (!vg)
 727                 return NULL;
 728
 729         return br_vlan_lookup(&vg->vlan_hash, vid);
 730 }
 731
 732 /* Must be protected by RTNL. */
 733 static void recalculate_group_addr(struct net_bridge *br)
 734 {
 735         if (br_opt_get(br, BROPT_GROUP_ADDR_SET))
 736                 return;
 737
 738         spin_lock_bh(&br->lock);
 739         if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
 740             br->vlan_proto == htons(ETH_P_8021Q)) {
 741                 /* Bridge Group Address */
 742                 br->group_addr[5] = 0x00;
 743         } else { /* vlan_enabled && ETH_P_8021AD */
 744                 /* Provider Bridge Group Address */
 745                 br->group_addr[5] = 0x08;
 746         }
 747         spin_unlock_bh(&br->lock);
 748 }
 749
 750 /* Must be protected by RTNL. */
 751 void br_recalculate_fwd_mask(struct net_bridge *br)
 752 {
 753         if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
 754             br->vlan_proto == htons(ETH_P_8021Q))
 755                 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
 756         else /* vlan_enabled && ETH_P_8021AD */
 757                 br->group_fwd_mask_required = BR_GROUPFWD_8021AD &
 758                                               ~(1u << br->group_addr[5]);
 759 }
 760
 761 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
 762 {
 763         struct switchdev_attr attr = {
 764                 .orig_dev = br->dev,
 765                 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
 766                 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
 767                 .u.vlan_filtering = val,
 768         };
 769         int err;
 770
 771         if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val)
 772                 return 0;
 773
 774         err = switchdev_port_attr_set(br->dev, &attr);
 775         if (err && err != -EOPNOTSUPP)
 776                 return err;
 777
 778         br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val);
 779         br_manage_promisc(br);
 780         recalculate_group_addr(br);
 781         br_recalculate_fwd_mask(br);
 782
 783         return 0;
 784 }
 785
 786 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
 787 {
 788         return __br_vlan_filter_toggle(br, val);
 789 }
 790
 791 bool br_vlan_enabled(const struct net_device *dev)
 792 {
 793         struct net_bridge *br = netdev_priv(dev);
 794
 795         return br_opt_get(br, BROPT_VLAN_ENABLED);
 796 }
 797 EXPORT_SYMBOL_GPL(br_vlan_enabled);
 798
 799 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto)
 800 {
 801         int err = 0;
 802         struct net_bridge_port *p;
 803         struct net_bridge_vlan *vlan;
 804         struct net_bridge_vlan_group *vg;
 805         __be16 oldproto;
 806
 807         if (br->vlan_proto == proto)
 808                 return 0;
 809
 810         /* Add VLANs for the new proto to the device filter. */
 811         list_for_each_entry(p, &br->port_list, list) {
 812                 vg = nbp_vlan_group(p);
 813                 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
 814                         err = vlan_vid_add(p->dev, proto, vlan->vid);
 815                         if (err)
 816                                 goto err_filt;
 817                 }
 818         }
 819
 820         oldproto = br->vlan_proto;
 821         br->vlan_proto = proto;
 822
 823         recalculate_group_addr(br);
 824         br_recalculate_fwd_mask(br);
 825
 826         /* Delete VLANs for the old proto from the device filter. */
 827         list_for_each_entry(p, &br->port_list, list) {
 828                 vg = nbp_vlan_group(p);
 829                 list_for_each_entry(vlan, &vg->vlan_list, vlist)
 830                         vlan_vid_del(p->dev, oldproto, vlan->vid);
 831         }
 832
 833         return 0;
 834
 835 err_filt:
 836         list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist)
 837                 vlan_vid_del(p->dev, proto, vlan->vid);
 838
 839         list_for_each_entry_continue_reverse(p, &br->port_list, list) {
 840                 vg = nbp_vlan_group(p);
 841                 list_for_each_entry(vlan, &vg->vlan_list, vlist)
 842                         vlan_vid_del(p->dev, proto, vlan->vid);
 843         }
 844
 845         return err;
 846 }
 847
 848 int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
 849 {
 850         if (val != ETH_P_8021Q && val != ETH_P_8021AD)
 851                 return -EPROTONOSUPPORT;
 852
 853         return __br_vlan_set_proto(br, htons(val));
 854 }
 855
 856 int br_vlan_set_stats(struct net_bridge *br, unsigned long val)
 857 {
 858         switch (val) {
 859         case 0:
 860         case 1:
 861                 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val);
 862                 break;
 863         default:
 864                 return -EINVAL;
 865         }
 866
 867         return 0;
 868 }
 869
 870 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val)
 871 {
 872         struct net_bridge_port *p;
 873
 874         /* allow to change the option if there are no port vlans configured */
 875         list_for_each_entry(p, &br->port_list, list) {
 876                 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
 877
 878                 if (vg->num_vlans)
 879                         return -EBUSY;
 880         }
 881
 882         switch (val) {
 883         case 0:
 884         case 1:
 885                 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val);
 886                 break;
 887         default:
 888                 return -EINVAL;
 889         }
 890
 891         return 0;
 892 }
 893
 894 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid)
 895 {
 896         struct net_bridge_vlan *v;
 897
 898         if (vid != vg->pvid)
 899                 return false;
 900
 901         v = br_vlan_lookup(&vg->vlan_hash, vid);
 902         if (v && br_vlan_should_use(v) &&
 903             (v->flags & BRIDGE_VLAN_INFO_UNTAGGED))
 904                 return true;
 905
 906         return false;
 907 }
 908
 909 static void br_vlan_disable_default_pvid(struct net_bridge *br)
 910 {
 911         struct net_bridge_port *p;
 912         u16 pvid = br->default_pvid;
 913
 914         /* Disable default_pvid on all ports where it is still
 915          * configured.
 916          */
 917         if (vlan_default_pvid(br_vlan_group(br), pvid))
 918                 br_vlan_delete(br, pvid);
 919
 920         list_for_each_entry(p, &br->port_list, list) {
 921                 if (vlan_default_pvid(nbp_vlan_group(p), pvid))
 922                         nbp_vlan_delete(p, pvid);
 923         }
 924
 925         br->default_pvid = 0;
 926 }
 927
 928 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
 929                                struct netlink_ext_ack *extack)
 930 {
 931         const struct net_bridge_vlan *pvent;
 932         struct net_bridge_vlan_group *vg;
 933         struct net_bridge_port *p;
 934         unsigned long *changed;
 935         bool vlchange;
 936         u16 old_pvid;
 937         int err = 0;
 938
 939         if (!pvid) {
 940                 br_vlan_disable_default_pvid(br);
 941                 return 0;
 942         }
 943
 944         changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL);
 945         if (!changed)
 946                 return -ENOMEM;
 947
 948         old_pvid = br->default_pvid;
 949
 950         /* Update default_pvid config only if we do not conflict with
 951          * user configuration.
 952          */
 953         vg = br_vlan_group(br);
 954         pvent = br_vlan_find(vg, pvid);
 955         if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) &&
 956             (!pvent || !br_vlan_should_use(pvent))) {
 957                 err = br_vlan_add(br, pvid,
 958                                   BRIDGE_VLAN_INFO_PVID |
 959                                   BRIDGE_VLAN_INFO_UNTAGGED |
 960                                   BRIDGE_VLAN_INFO_BRENTRY,
 961                                   &vlchange, extack);
 962                 if (err)
 963                         goto out;
 964                 br_vlan_delete(br, old_pvid);
 965                 set_bit(0, changed);
 966         }
 967
 968         list_for_each_entry(p, &br->port_list, list) {
 969                 /* Update default_pvid config only if we do not conflict with
 970                  * user configuration.
 971                  */
 972                 vg = nbp_vlan_group(p);
 973                 if ((old_pvid &&
 974                      !vlan_default_pvid(vg, old_pvid)) ||
 975                     br_vlan_find(vg, pvid))
 976                         continue;
 977
 978                 err = nbp_vlan_add(p, pvid,
 979                                    BRIDGE_VLAN_INFO_PVID |
 980                                    BRIDGE_VLAN_INFO_UNTAGGED,
 981                                    &vlchange, extack);
 982                 if (err)
 983                         goto err_port;
 984                 nbp_vlan_delete(p, old_pvid);
 985                 set_bit(p->port_no, changed);
 986         }
 987
 988         br->default_pvid = pvid;
 989
 990 out:
 991         bitmap_free(changed);
 992         return err;
 993
 994 err_port:
 995         list_for_each_entry_continue_reverse(p, &br->port_list, list) {
 996                 if (!test_bit(p->port_no, changed))
 997                         continue;
 998
 999                 if (old_pvid)
1000                         nbp_vlan_add(p, old_pvid,
1001                                      BRIDGE_VLAN_INFO_PVID |
1002                                      BRIDGE_VLAN_INFO_UNTAGGED,
1003                                      &vlchange, NULL);
1004                 nbp_vlan_delete(p, pvid);
1005         }
1006
1007         if (test_bit(0, changed)) {
1008                 if (old_pvid)
1009                         br_vlan_add(br, old_pvid,
1010                                     BRIDGE_VLAN_INFO_PVID |
1011                                     BRIDGE_VLAN_INFO_UNTAGGED |
1012                                     BRIDGE_VLAN_INFO_BRENTRY,
1013                                     &vlchange, NULL);
1014                 br_vlan_delete(br, pvid);
1015         }
1016         goto out;
1017 }
1018
1019 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val)
1020 {
1021         u16 pvid = val;
1022         int err = 0;
1023
1024         if (val >= VLAN_VID_MASK)
1025                 return -EINVAL;
1026
1027         if (pvid == br->default_pvid)
1028                 goto out;
1029
1030         /* Only allow default pvid change when filtering is disabled */
1031         if (br_opt_get(br, BROPT_VLAN_ENABLED)) {
1032                 pr_info_once("Please disable vlan filtering to change default_pvid\n");
1033                 err = -EPERM;
1034                 goto out;
1035         }
1036         err = __br_vlan_set_default_pvid(br, pvid, NULL);
1037 out:
1038         return err;
1039 }
1040
1041 int br_vlan_init(struct net_bridge *br)
1042 {
1043         struct net_bridge_vlan_group *vg;
1044         int ret = -ENOMEM;
1045         bool changed;
1046
1047         vg = kzalloc(sizeof(*vg), GFP_KERNEL);
1048         if (!vg)
1049                 goto out;
1050         ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1051         if (ret)
1052                 goto err_rhtbl;
1053         ret = vlan_tunnel_init(vg);
1054         if (ret)
1055                 goto err_tunnel_init;
1056         INIT_LIST_HEAD(&vg->vlan_list);
1057         br->vlan_proto = htons(ETH_P_8021Q);
1058         br->default_pvid = 1;
1059         rcu_assign_pointer(br->vlgrp, vg);
1060         ret = br_vlan_add(br, 1,
1061                           BRIDGE_VLAN_INFO_PVID | BRIDGE_VLAN_INFO_UNTAGGED |
1062                           BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL);
1063         if (ret)
1064                 goto err_vlan_add;
1065
1066 out:
1067         return ret;
1068
1069 err_vlan_add:
1070         vlan_tunnel_deinit(vg);
1071 err_tunnel_init:
1072         rhashtable_destroy(&vg->vlan_hash);
1073 err_rhtbl:
1074         kfree(vg);
1075
1076         goto out;
1077 }
1078
1079 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack)
1080 {
1081         struct switchdev_attr attr = {
1082                 .orig_dev = p->br->dev,
1083                 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
1084                 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
1085                 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED),
1086         };
1087         struct net_bridge_vlan_group *vg;
1088         int ret = -ENOMEM;
1089
1090         vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL);
1091         if (!vg)
1092                 goto out;
1093
1094         ret = switchdev_port_attr_set(p->dev, &attr);
1095         if (ret && ret != -EOPNOTSUPP)
1096                 goto err_vlan_enabled;
1097
1098         ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1099         if (ret)
1100                 goto err_rhtbl;
1101         ret = vlan_tunnel_init(vg);
1102         if (ret)
1103                 goto err_tunnel_init;
1104         INIT_LIST_HEAD(&vg->vlan_list);
1105         rcu_assign_pointer(p->vlgrp, vg);
1106         if (p->br->default_pvid) {
1107                 bool changed;
1108
1109                 ret = nbp_vlan_add(p, p->br->default_pvid,
1110                                    BRIDGE_VLAN_INFO_PVID |
1111                                    BRIDGE_VLAN_INFO_UNTAGGED,
1112                                    &changed, extack);
1113                 if (ret)
1114                         goto err_vlan_add;
1115         }
1116 out:
1117         return ret;
1118
1119 err_vlan_add:
1120         RCU_INIT_POINTER(p->vlgrp, NULL);
1121         synchronize_rcu();
1122         vlan_tunnel_deinit(vg);
1123 err_tunnel_init:
1124         rhashtable_destroy(&vg->vlan_hash);
1125 err_rhtbl:
1126 err_vlan_enabled:
1127         kfree(vg);
1128
1129         goto out;
1130 }
1131
1132 /* Must be protected by RTNL.
1133  * Must be called with vid in range from 1 to 4094 inclusive.
1134  * changed must be true only if the vlan was created or updated
1135  */
1136 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1137                  bool *changed, struct netlink_ext_ack *extack)
1138 {
1139         struct net_bridge_vlan *vlan;
1140         int ret;
1141
1142         ASSERT_RTNL();
1143
1144         *changed = false;
1145         vlan = br_vlan_find(nbp_vlan_group(port), vid);
1146         if (vlan) {
1147                 /* Pass the flags to the hardware bridge */
1148                 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack);
1149                 if (ret && ret != -EOPNOTSUPP)
1150                         return ret;
1151                 *changed = __vlan_add_flags(vlan, flags);
1152
1153                 return 0;
1154         }
1155
1156         vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1157         if (!vlan)
1158                 return -ENOMEM;
1159
1160         vlan->vid = vid;
1161         vlan->port = port;
1162         ret = __vlan_add(vlan, flags, extack);
1163         if (ret)
1164                 kfree(vlan);
1165         else
1166                 *changed = true;
1167
1168         return ret;
1169 }
1170
1171 /* Must be protected by RTNL.
1172  * Must be called with vid in range from 1 to 4094 inclusive.
1173  */
1174 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1175 {
1176         struct net_bridge_vlan *v;
1177
1178         ASSERT_RTNL();
1179
1180         v = br_vlan_find(nbp_vlan_group(port), vid);
1181         if (!v)
1182                 return -ENOENT;
1183         br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid);
1184         br_fdb_delete_by_port(port->br, port, vid, 0);
1185
1186         return __vlan_del(v);
1187 }
1188
1189 void nbp_vlan_flush(struct net_bridge_port *port)
1190 {
1191         struct net_bridge_vlan_group *vg;
1192
1193         ASSERT_RTNL();
1194
1195         vg = nbp_vlan_group(port);
1196         __vlan_flush(vg);
1197         RCU_INIT_POINTER(port->vlgrp, NULL);
1198         synchronize_rcu();
1199         __vlan_group_free(vg);
1200 }
1201
1202 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1203                        struct br_vlan_stats *stats)
1204 {
1205         int i;
1206
1207         memset(stats, 0, sizeof(*stats));
1208         for_each_possible_cpu(i) {
1209                 u64 rxpackets, rxbytes, txpackets, txbytes;
1210                 struct br_vlan_stats *cpu_stats;
1211                 unsigned int start;
1212
1213                 cpu_stats = per_cpu_ptr(v->stats, i);
1214                 do {
1215                         start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
1216                         rxpackets = cpu_stats->rx_packets;
1217                         rxbytes = cpu_stats->rx_bytes;
1218                         txbytes = cpu_stats->tx_bytes;
1219                         txpackets = cpu_stats->tx_packets;
1220                 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
1221
1222                 stats->rx_packets += rxpackets;
1223                 stats->rx_bytes += rxbytes;
1224                 stats->tx_bytes += txbytes;
1225                 stats->tx_packets += txpackets;
1226         }
1227 }
1228
1229 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
1230 {
1231         struct net_bridge_vlan_group *vg;
1232         struct net_bridge_port *p;
1233
1234         ASSERT_RTNL();
1235         p = br_port_get_check_rtnl(dev);
1236         if (p)
1237                 vg = nbp_vlan_group(p);
1238         else if (netif_is_bridge_master(dev))
1239                 vg = br_vlan_group(netdev_priv(dev));
1240         else
1241                 return -EINVAL;
1242
1243         *p_pvid = br_get_pvid(vg);
1244         return 0;
1245 }
1246 EXPORT_SYMBOL_GPL(br_vlan_get_pvid);
1247
1248 int br_vlan_get_info(const struct net_device *dev, u16 vid,
1249                      struct bridge_vlan_info *p_vinfo)
1250 {
1251         struct net_bridge_vlan_group *vg;
1252         struct net_bridge_vlan *v;
1253         struct net_bridge_port *p;
1254
1255         ASSERT_RTNL();
1256         p = br_port_get_check_rtnl(dev);
1257         if (p)
1258                 vg = nbp_vlan_group(p);
1259         else if (netif_is_bridge_master(dev))
1260                 vg = br_vlan_group(netdev_priv(dev));
1261         else
1262                 return -EINVAL;
1263
1264         v = br_vlan_find(vg, vid);
1265         if (!v)
1266                 return -ENOENT;
1267
1268         p_vinfo->vid = vid;
1269         p_vinfo->flags = v->flags;
1270         return 0;
1271 }
1272 EXPORT_SYMBOL_GPL(br_vlan_get_info);
1273
1274 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev)
1275 {
1276         return is_vlan_dev(dev) &&
1277                 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING);
1278 }
1279
1280 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev,
1281                                        __always_unused void *data)
1282 {
1283         return br_vlan_is_bind_vlan_dev(dev);
1284 }
1285
1286 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev)
1287 {
1288         int found;
1289
1290         rcu_read_lock();
1291         found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn,
1292                                               NULL);
1293         rcu_read_unlock();
1294
1295         return !!found;
1296 }
1297
1298 struct br_vlan_bind_walk_data {
1299         u16 vid;
1300         struct net_device *result;
1301 };
1302
1303 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev,
1304                                           void *data_in)
1305 {
1306         struct br_vlan_bind_walk_data *data = data_in;
1307         int found = 0;
1308
1309         if (br_vlan_is_bind_vlan_dev(dev) &&
1310             vlan_dev_priv(dev)->vlan_id == data->vid) {
1311                 data->result = dev;
1312                 found = 1;
1313         }
1314
1315         return found;
1316 }
1317
1318 static struct net_device *
1319 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid)
1320 {
1321         struct br_vlan_bind_walk_data data = {
1322                 .vid = vid,
1323         };
1324
1325         rcu_read_lock();
1326         netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn,
1327                                       &data);
1328         rcu_read_unlock();
1329
1330         return data.result;
1331 }
1332
1333 static bool br_vlan_is_dev_up(const struct net_device *dev)
1334 {
1335         return  !!(dev->flags & IFF_UP) && netif_oper_up(dev);
1336 }
1337
1338 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br,
1339                                        struct net_device *vlan_dev)
1340 {
1341         u16 vid = vlan_dev_priv(vlan_dev)->vlan_id;
1342         struct net_bridge_vlan_group *vg;
1343         struct net_bridge_port *p;
1344         bool has_carrier = false;
1345
1346         if (!netif_carrier_ok(br->dev)) {
1347                 netif_carrier_off(vlan_dev);
1348                 return;
1349         }
1350
1351         list_for_each_entry(p, &br->port_list, list) {
1352                 vg = nbp_vlan_group(p);
1353                 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) {
1354                         has_carrier = true;
1355                         break;
1356                 }
1357         }
1358
1359         if (has_carrier)
1360                 netif_carrier_on(vlan_dev);
1361         else
1362                 netif_carrier_off(vlan_dev);
1363 }
1364
1365 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p)
1366 {
1367         struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
1368         struct net_bridge_vlan *vlan;
1369         struct net_device *vlan_dev;
1370
1371         list_for_each_entry(vlan, &vg->vlan_list, vlist) {
1372                 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev,
1373                                                            vlan->vid);
1374                 if (vlan_dev) {
1375                         if (br_vlan_is_dev_up(p->dev)) {
1376                                 if (netif_carrier_ok(p->br->dev))
1377                                         netif_carrier_on(vlan_dev);
1378                         } else {
1379                                 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1380                         }
1381                 }
1382         }
1383 }
1384
1385 static void br_vlan_upper_change(struct net_device *dev,
1386                                  struct net_device *upper_dev,
1387                                  bool linking)
1388 {
1389         struct net_bridge *br = netdev_priv(dev);
1390
1391         if (!br_vlan_is_bind_vlan_dev(upper_dev))
1392                 return;
1393
1394         if (linking) {
1395                 br_vlan_set_vlan_dev_state(br, upper_dev);
1396                 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true);
1397         } else {
1398                 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING,
1399                               br_vlan_has_upper_bind_vlan_dev(dev));
1400         }
1401 }
1402
1403 struct br_vlan_link_state_walk_data {
1404         struct net_bridge *br;
1405 };
1406
1407 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev,
1408                                         void *data_in)
1409 {
1410         struct br_vlan_link_state_walk_data *data = data_in;
1411
1412         if (br_vlan_is_bind_vlan_dev(vlan_dev))
1413                 br_vlan_set_vlan_dev_state(data->br, vlan_dev);
1414
1415         return 0;
1416 }
1417
1418 static void br_vlan_link_state_change(struct net_device *dev,
1419                                       struct net_bridge *br)
1420 {
1421         struct br_vlan_link_state_walk_data data = {
1422                 .br = br
1423         };
1424
1425         rcu_read_lock();
1426         netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn,
1427                                       &data);
1428         rcu_read_unlock();
1429 }
1430
1431 /* Must be protected by RTNL. */
1432 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid)
1433 {
1434         struct net_device *vlan_dev;
1435
1436         if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1437                 return;
1438
1439         vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid);
1440         if (vlan_dev)
1441                 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1442 }
1443
1444 /* Must be protected by RTNL. */
1445 void br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1446                           void *ptr)
1447 {
1448         struct netdev_notifier_changeupper_info *info;
1449         struct net_bridge *br;
1450
1451         switch (event) {
1452         case NETDEV_CHANGEUPPER:
1453                 info = ptr;
1454                 br_vlan_upper_change(dev, info->upper_dev, info->linking);
1455                 break;
1456
1457         case NETDEV_CHANGE:
1458         case NETDEV_UP:
1459                 br = netdev_priv(dev);
1460                 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING))
1461                         return;
1462                 br_vlan_link_state_change(dev, br);
1463                 break;
1464         }
1465 }
1466
1467 /* Must be protected by RTNL. */
1468 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event)
1469 {
1470         if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1471                 return;
1472
1473         switch (event) {
1474         case NETDEV_CHANGE:
1475         case NETDEV_DOWN:
1476         case NETDEV_UP:
1477                 br_vlan_set_all_vlan_dev_state(p);
1478                 break;
1479         }
1480 }