net/8021q/vlan_dev.c

   1 /* -*- linux-c -*-
   2  * INET         802.1Q VLAN
   3  *              Ethernet-type device handling.
   4  *
   5  * Authors:     Ben Greear <greearb@candelatech.com>
   6  *              Please send support related email to: netdev@vger.kernel.org
   7  *              VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
   8  *
   9  * Fixes:       Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com>
  10  *                - reset skb->pkt_type on incoming packets when MAC was changed
  11  *                - see that changed MAC is saddr for outgoing packets
  12  *              Oct 20, 2001:  Ard van Breeman:
  13  *                - Fix MC-list, finally.
  14  *                - Flush MC-list on VLAN destroy.
  15  *
  16  *
  17  *              This program is free software; you can redistribute it and/or
  18  *              modify it under the terms of the GNU General Public License
  19  *              as published by the Free Software Foundation; either version
  20  *              2 of the License, or (at your option) any later version.
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/slab.h>
  25 #include <linux/skbuff.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/etherdevice.h>
  28 #include <linux/ethtool.h>
  29 #include <net/arp.h>
  30
  31 #include "vlan.h"
  32 #include "vlanproc.h"
  33 #include <linux/if_vlan.h>
  34
  35 /*
  36  *      Rebuild the Ethernet MAC header. This is called after an ARP
  37  *      (or in future other address resolution) has completed on this
  38  *      sk_buff. We now let ARP fill in the other fields.
  39  *
  40  *      This routine CANNOT use cached dst->neigh!
  41  *      Really, it is used only when dst->neigh is wrong.
  42  *
  43  * TODO:  This needs a checkup, I'm ignorant here. --BLG
  44  */
  45 static int vlan_dev_rebuild_header(struct sk_buff *skb)
  46 {
  47         struct net_device *dev = skb->dev;
  48         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
  49
  50         switch (veth->h_vlan_encapsulated_proto) {
  51 #ifdef CONFIG_INET
  52         case htons(ETH_P_IP):
  53
  54                 /* TODO:  Confirm this will work with VLAN headers... */
  55                 return arp_find(veth->h_dest, skb);
  56 #endif
  57         default:
  58                 pr_debug("%s: unable to resolve type %X addresses.\n",
  59                          dev->name, ntohs(veth->h_vlan_encapsulated_proto));
  60
  61                 memcpy(veth->h_source, dev->dev_addr, ETH_ALEN);
  62                 break;
  63         }
  64
  65         return 0;
  66 }
  67
  68 static inline u16
  69 vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb)
  70 {
  71         struct vlan_priority_tci_mapping *mp;
  72
  73         mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)];
  74         while (mp) {
  75                 if (mp->priority == skb->priority) {
  76                         return mp->vlan_qos; /* This should already be shifted
  77                                               * to mask correctly with the
  78                                               * VLAN's TCI */
  79                 }
  80                 mp = mp->next;
  81         }
  82         return 0;
  83 }
  84
  85 /*
  86  *      Create the VLAN header for an arbitrary protocol layer
  87  *
  88  *      saddr=NULL      means use device source address
  89  *      daddr=NULL      means leave destination address (eg unresolved arp)
  90  *
  91  *  This is called when the SKB is moving down the stack towards the
  92  *  physical devices.
  93  */
  94 static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
  95                                 unsigned short type,
  96                                 const void *daddr, const void *saddr,
  97                                 unsigned int len)
  98 {
  99         struct vlan_hdr *vhdr;
 100         unsigned int vhdrlen = 0;
 101         u16 vlan_tci = 0;
 102         int rc;
 103
 104         if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) {
 105                 vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
 106
 107                 vlan_tci = vlan_dev_info(dev)->vlan_id;
 108                 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
 109                 vhdr->h_vlan_TCI = htons(vlan_tci);
 110
 111                 /*
 112                  *  Set the protocol type. For a packet of type ETH_P_802_3/2 we
 113                  *  put the length in here instead.
 114                  */
 115                 if (type != ETH_P_802_3 && type != ETH_P_802_2)
 116                         vhdr->h_vlan_encapsulated_proto = htons(type);
 117                 else
 118                         vhdr->h_vlan_encapsulated_proto = htons(len);
 119
 120                 skb->protocol = htons(ETH_P_8021Q);
 121                 type = ETH_P_8021Q;
 122                 vhdrlen = VLAN_HLEN;
 123         }
 124
 125         /* Before delegating work to the lower layer, enter our MAC-address */
 126         if (saddr == NULL)
 127                 saddr = dev->dev_addr;
 128
 129         /* Now make the underlying real hard header */
 130         dev = vlan_dev_info(dev)->real_dev;
 131         rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
 132         if (rc > 0)
 133                 rc += vhdrlen;
 134         return rc;
 135 }
 136
 137 static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
 138                                             struct net_device *dev)
 139 {
 140         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
 141         unsigned int len;
 142         int ret;
 143
 144         /* Handle non-VLAN frames if they are sent to us, for example by DHCP.
 145          *
 146          * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
 147          * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
 148          */
 149         if (veth->h_vlan_proto != htons(ETH_P_8021Q) ||
 150             vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) {
 151                 u16 vlan_tci;
 152                 vlan_tci = vlan_dev_info(dev)->vlan_id;
 153                 vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
 154                 skb = __vlan_hwaccel_put_tag(skb, vlan_tci);
 155         }
 156
 157         skb_set_dev(skb, vlan_dev_info(dev)->real_dev);
 158         len = skb->len;
 159         ret = dev_queue_xmit(skb);
 160
 161         if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
 162                 struct vlan_pcpu_stats *stats;
 163
 164                 stats = this_cpu_ptr(vlan_dev_info(dev)->vlan_pcpu_stats);
 165                 u64_stats_update_begin(&stats->syncp);
 166                 stats->tx_packets++;
 167                 stats->tx_bytes += len;
 168                 u64_stats_update_end(&stats->syncp);
 169         } else {
 170                 this_cpu_inc(vlan_dev_info(dev)->vlan_pcpu_stats->tx_dropped);
 171         }
 172
 173         return ret;
 174 }
 175
 176 static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
 177 {
 178         /* TODO: gotta make sure the underlying layer can handle it,
 179          * maybe an IFF_VLAN_CAPABLE flag for devices?
 180          */
 181         if (vlan_dev_info(dev)->real_dev->mtu < new_mtu)
 182                 return -ERANGE;
 183
 184         dev->mtu = new_mtu;
 185
 186         return 0;
 187 }
 188
 189 void vlan_dev_set_ingress_priority(const struct net_device *dev,
 190                                    u32 skb_prio, u16 vlan_prio)
 191 {
 192         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 193
 194         if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
 195                 vlan->nr_ingress_mappings--;
 196         else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
 197                 vlan->nr_ingress_mappings++;
 198
 199         vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
 200 }
 201
 202 int vlan_dev_set_egress_priority(const struct net_device *dev,
 203                                  u32 skb_prio, u16 vlan_prio)
 204 {
 205         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 206         struct vlan_priority_tci_mapping *mp = NULL;
 207         struct vlan_priority_tci_mapping *np;
 208         u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
 209
 210         /* See if a priority mapping exists.. */
 211         mp = vlan->egress_priority_map[skb_prio & 0xF];
 212         while (mp) {
 213                 if (mp->priority == skb_prio) {
 214                         if (mp->vlan_qos && !vlan_qos)
 215                                 vlan->nr_egress_mappings--;
 216                         else if (!mp->vlan_qos && vlan_qos)
 217                                 vlan->nr_egress_mappings++;
 218                         mp->vlan_qos = vlan_qos;
 219                         return 0;
 220                 }
 221                 mp = mp->next;
 222         }
 223
 224         /* Create a new mapping then. */
 225         mp = vlan->egress_priority_map[skb_prio & 0xF];
 226         np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
 227         if (!np)
 228                 return -ENOBUFS;
 229
 230         np->next = mp;
 231         np->priority = skb_prio;
 232         np->vlan_qos = vlan_qos;
 233         vlan->egress_priority_map[skb_prio & 0xF] = np;
 234         if (vlan_qos)
 235                 vlan->nr_egress_mappings++;
 236         return 0;
 237 }
 238
 239 /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
 240 int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
 241 {
 242         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 243         u32 old_flags = vlan->flags;
 244
 245         if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
 246                      VLAN_FLAG_LOOSE_BINDING))
 247                 return -EINVAL;
 248
 249         vlan->flags = (old_flags & ~mask) | (flags & mask);
 250
 251         if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
 252                 if (vlan->flags & VLAN_FLAG_GVRP)
 253                         vlan_gvrp_request_join(dev);
 254                 else
 255                         vlan_gvrp_request_leave(dev);
 256         }
 257         return 0;
 258 }
 259
 260 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
 261 {
 262         strncpy(result, vlan_dev_info(dev)->real_dev->name, 23);
 263 }
 264
 265 static int vlan_dev_open(struct net_device *dev)
 266 {
 267         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 268         struct net_device *real_dev = vlan->real_dev;
 269         int err;
 270
 271         if (!(real_dev->flags & IFF_UP) &&
 272             !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
 273                 return -ENETDOWN;
 274
 275         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) {
 276                 err = dev_uc_add(real_dev, dev->dev_addr);
 277                 if (err < 0)
 278                         goto out;
 279         }
 280
 281         if (dev->flags & IFF_ALLMULTI) {
 282                 err = dev_set_allmulti(real_dev, 1);
 283                 if (err < 0)
 284                         goto del_unicast;
 285         }
 286         if (dev->flags & IFF_PROMISC) {
 287                 err = dev_set_promiscuity(real_dev, 1);
 288                 if (err < 0)
 289                         goto clear_allmulti;
 290         }
 291
 292         memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);
 293
 294         if (vlan->flags & VLAN_FLAG_GVRP)
 295                 vlan_gvrp_request_join(dev);
 296
 297         if (netif_carrier_ok(real_dev))
 298                 netif_carrier_on(dev);
 299         return 0;
 300
 301 clear_allmulti:
 302         if (dev->flags & IFF_ALLMULTI)
 303                 dev_set_allmulti(real_dev, -1);
 304 del_unicast:
 305         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
 306                 dev_uc_del(real_dev, dev->dev_addr);
 307 out:
 308         netif_carrier_off(dev);
 309         return err;
 310 }
 311
 312 static int vlan_dev_stop(struct net_device *dev)
 313 {
 314         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 315         struct net_device *real_dev = vlan->real_dev;
 316
 317         dev_mc_unsync(real_dev, dev);
 318         dev_uc_unsync(real_dev, dev);
 319         if (dev->flags & IFF_ALLMULTI)
 320                 dev_set_allmulti(real_dev, -1);
 321         if (dev->flags & IFF_PROMISC)
 322                 dev_set_promiscuity(real_dev, -1);
 323
 324         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
 325                 dev_uc_del(real_dev, dev->dev_addr);
 326
 327         netif_carrier_off(dev);
 328         return 0;
 329 }
 330
 331 static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
 332 {
 333         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
 334         struct sockaddr *addr = p;
 335         int err;
 336
 337         if (!is_valid_ether_addr(addr->sa_data))
 338                 return -EADDRNOTAVAIL;
 339
 340         if (!(dev->flags & IFF_UP))
 341                 goto out;
 342
 343         if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) {
 344                 err = dev_uc_add(real_dev, addr->sa_data);
 345                 if (err < 0)
 346                         return err;
 347         }
 348
 349         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
 350                 dev_uc_del(real_dev, dev->dev_addr);
 351
 352 out:
 353         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
 354         return 0;
 355 }
 356
 357 static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 358 {
 359         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
 360         const struct net_device_ops *ops = real_dev->netdev_ops;
 361         struct ifreq ifrr;
 362         int err = -EOPNOTSUPP;
 363
 364         strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
 365         ifrr.ifr_ifru = ifr->ifr_ifru;
 366
 367         switch (cmd) {
 368         case SIOCGMIIPHY:
 369         case SIOCGMIIREG:
 370         case SIOCSMIIREG:
 371                 if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
 372                         err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
 373                 break;
 374         }
 375
 376         if (!err)
 377                 ifr->ifr_ifru = ifrr.ifr_ifru;
 378
 379         return err;
 380 }
 381
 382 static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
 383 {
 384         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
 385         const struct net_device_ops *ops = real_dev->netdev_ops;
 386         int err = 0;
 387
 388         if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
 389                 err = ops->ndo_neigh_setup(real_dev, pa);
 390
 391         return err;
 392 }
 393
 394 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
 395 static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
 396                                    struct scatterlist *sgl, unsigned int sgc)
 397 {
 398         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
 399         const struct net_device_ops *ops = real_dev->netdev_ops;
 400         int rc = 0;
 401
 402         if (ops->ndo_fcoe_ddp_setup)
 403                 rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
 404
 405         return rc;
 406 }
 407
 408 static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
 409 {
 410         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
 411         const struct net_device_ops *ops = real_dev->netdev_ops;
 412         int len = 0;
 413
 414         if (ops->ndo_fcoe_ddp_done)
 415                 len = ops->ndo_fcoe_ddp_done(real_dev, xid);
 416
 417         return len;
 418 }
 419
 420 static int vlan_dev_fcoe_enable(struct net_device *dev)
 421 {
 422         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
 423         const struct net_device_ops *ops = real_dev->netdev_ops;
 424         int rc = -EINVAL;
 425
 426         if (ops->ndo_fcoe_enable)
 427                 rc = ops->ndo_fcoe_enable(real_dev);
 428         return rc;
 429 }
 430
 431 static int vlan_dev_fcoe_disable(struct net_device *dev)
 432 {
 433         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
 434         const struct net_device_ops *ops = real_dev->netdev_ops;
 435         int rc = -EINVAL;
 436
 437         if (ops->ndo_fcoe_disable)
 438                 rc = ops->ndo_fcoe_disable(real_dev);
 439         return rc;
 440 }
 441
 442 static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
 443 {
 444         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
 445         const struct net_device_ops *ops = real_dev->netdev_ops;
 446         int rc = -EINVAL;
 447
 448         if (ops->ndo_fcoe_get_wwn)
 449                 rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
 450         return rc;
 451 }
 452
 453 static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
 454                                     struct scatterlist *sgl, unsigned int sgc)
 455 {
 456         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
 457         const struct net_device_ops *ops = real_dev->netdev_ops;
 458         int rc = 0;
 459
 460         if (ops->ndo_fcoe_ddp_target)
 461                 rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
 462
 463         return rc;
 464 }
 465 #endif
 466
 467 static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
 468 {
 469         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
 470
 471         if (change & IFF_ALLMULTI)
 472                 dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
 473         if (change & IFF_PROMISC)
 474                 dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
 475 }
 476
 477 static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
 478 {
 479         dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev);
 480         dev_uc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev);
 481 }
 482
 483 /*
 484  * vlan network devices have devices nesting below it, and are a special
 485  * "super class" of normal network devices; split their locks off into a
 486  * separate class since they always nest.
 487  */
 488 static struct lock_class_key vlan_netdev_xmit_lock_key;
 489 static struct lock_class_key vlan_netdev_addr_lock_key;
 490
 491 static void vlan_dev_set_lockdep_one(struct net_device *dev,
 492                                      struct netdev_queue *txq,
 493                                      void *_subclass)
 494 {
 495         lockdep_set_class_and_subclass(&txq->_xmit_lock,
 496                                        &vlan_netdev_xmit_lock_key,
 497                                        *(int *)_subclass);
 498 }
 499
 500 static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
 501 {
 502         lockdep_set_class_and_subclass(&dev->addr_list_lock,
 503                                        &vlan_netdev_addr_lock_key,
 504                                        subclass);
 505         netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
 506 }
 507
 508 static const struct header_ops vlan_header_ops = {
 509         .create  = vlan_dev_hard_header,
 510         .rebuild = vlan_dev_rebuild_header,
 511         .parse   = eth_header_parse,
 512 };
 513
 514 static const struct net_device_ops vlan_netdev_ops;
 515
 516 static int vlan_dev_init(struct net_device *dev)
 517 {
 518         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
 519         int subclass = 0;
 520
 521         netif_carrier_off(dev);
 522
 523         /* IFF_BROADCAST|IFF_MULTICAST; ??? */
 524         dev->flags  = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
 525                                           IFF_MASTER | IFF_SLAVE);
 526         dev->iflink = real_dev->ifindex;
 527         dev->state  = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
 528                                           (1<<__LINK_STATE_DORMANT))) |
 529                       (1<<__LINK_STATE_PRESENT);
 530
 531         dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG |
 532                            NETIF_F_FRAGLIST | NETIF_F_ALL_TSO |
 533                            NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM |
 534                            NETIF_F_ALL_FCOE;
 535
 536         dev->features |= real_dev->vlan_features | NETIF_F_LLTX;
 537         dev->gso_max_size = real_dev->gso_max_size;
 538
 539         /* ipv6 shared card related stuff */
 540         dev->dev_id = real_dev->dev_id;
 541
 542         if (is_zero_ether_addr(dev->dev_addr))
 543                 memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
 544         if (is_zero_ether_addr(dev->broadcast))
 545                 memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);
 546
 547 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
 548         dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
 549 #endif
 550
 551         dev->needed_headroom = real_dev->needed_headroom;
 552         if (real_dev->features & NETIF_F_HW_VLAN_TX) {
 553                 dev->header_ops      = real_dev->header_ops;
 554                 dev->hard_header_len = real_dev->hard_header_len;
 555         } else {
 556                 dev->header_ops      = &vlan_header_ops;
 557                 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
 558         }
 559
 560         dev->netdev_ops = &vlan_netdev_ops;
 561
 562         if (is_vlan_dev(real_dev))
 563                 subclass = 1;
 564
 565         vlan_dev_set_lockdep_class(dev, subclass);
 566
 567         vlan_dev_info(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats);
 568         if (!vlan_dev_info(dev)->vlan_pcpu_stats)
 569                 return -ENOMEM;
 570
 571         return 0;
 572 }
 573
 574 static void vlan_dev_uninit(struct net_device *dev)
 575 {
 576         struct vlan_priority_tci_mapping *pm;
 577         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 578         int i;
 579
 580         free_percpu(vlan->vlan_pcpu_stats);
 581         vlan->vlan_pcpu_stats = NULL;
 582         for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
 583                 while ((pm = vlan->egress_priority_map[i]) != NULL) {
 584                         vlan->egress_priority_map[i] = pm->next;
 585                         kfree(pm);
 586                 }
 587         }
 588 }
 589
 590 static u32 vlan_dev_fix_features(struct net_device *dev, u32 features)
 591 {
 592         struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
 593         u32 old_features = features;
 594
 595         features &= real_dev->features;
 596         features &= real_dev->vlan_features;
 597
 598         if (old_features & NETIF_F_SOFT_FEATURES)
 599                 features |= old_features & NETIF_F_SOFT_FEATURES;
 600
 601         if (dev_ethtool_get_rx_csum(real_dev))
 602                 features |= NETIF_F_RXCSUM;
 603         features |= NETIF_F_LLTX;
 604
 605         return features;
 606 }
 607
 608 static int vlan_ethtool_get_settings(struct net_device *dev,
 609                                      struct ethtool_cmd *cmd)
 610 {
 611         const struct vlan_dev_info *vlan = vlan_dev_info(dev);
 612         return dev_ethtool_get_settings(vlan->real_dev, cmd);
 613 }
 614
 615 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
 616                                      struct ethtool_drvinfo *info)
 617 {
 618         strcpy(info->driver, vlan_fullname);
 619         strcpy(info->version, vlan_version);
 620         strcpy(info->fw_version, "N/A");
 621 }
 622
 623 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
 624 {
 625
 626         if (vlan_dev_info(dev)->vlan_pcpu_stats) {
 627                 struct vlan_pcpu_stats *p;
 628                 u32 rx_errors = 0, tx_dropped = 0;
 629                 int i;
 630
 631                 for_each_possible_cpu(i) {
 632                         u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;
 633                         unsigned int start;
 634
 635                         p = per_cpu_ptr(vlan_dev_info(dev)->vlan_pcpu_stats, i);
 636                         do {
 637                                 start = u64_stats_fetch_begin_bh(&p->syncp);
 638                                 rxpackets       = p->rx_packets;
 639                                 rxbytes         = p->rx_bytes;
 640                                 rxmulticast     = p->rx_multicast;
 641                                 txpackets       = p->tx_packets;
 642                                 txbytes         = p->tx_bytes;
 643                         } while (u64_stats_fetch_retry_bh(&p->syncp, start));
 644
 645                         stats->rx_packets       += rxpackets;
 646                         stats->rx_bytes         += rxbytes;
 647                         stats->multicast        += rxmulticast;
 648                         stats->tx_packets       += txpackets;
 649                         stats->tx_bytes         += txbytes;
 650                         /* rx_errors & tx_dropped are u32 */
 651                         rx_errors       += p->rx_errors;
 652                         tx_dropped      += p->tx_dropped;
 653                 }
 654                 stats->rx_errors  = rx_errors;
 655                 stats->tx_dropped = tx_dropped;
 656         }
 657         return stats;
 658 }
 659
 660 static const struct ethtool_ops vlan_ethtool_ops = {
 661         .get_settings           = vlan_ethtool_get_settings,
 662         .get_drvinfo            = vlan_ethtool_get_drvinfo,
 663         .get_link               = ethtool_op_get_link,
 664 };
 665
 666 static const struct net_device_ops vlan_netdev_ops = {
 667         .ndo_change_mtu         = vlan_dev_change_mtu,
 668         .ndo_init               = vlan_dev_init,
 669         .ndo_uninit             = vlan_dev_uninit,
 670         .ndo_open               = vlan_dev_open,
 671         .ndo_stop               = vlan_dev_stop,
 672         .ndo_start_xmit =  vlan_dev_hard_start_xmit,
 673         .ndo_validate_addr      = eth_validate_addr,
 674         .ndo_set_mac_address    = vlan_dev_set_mac_address,
 675         .ndo_set_rx_mode        = vlan_dev_set_rx_mode,
 676         .ndo_set_multicast_list = vlan_dev_set_rx_mode,
 677         .ndo_change_rx_flags    = vlan_dev_change_rx_flags,
 678         .ndo_do_ioctl           = vlan_dev_ioctl,
 679         .ndo_neigh_setup        = vlan_dev_neigh_setup,
 680         .ndo_get_stats64        = vlan_dev_get_stats64,
 681 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
 682         .ndo_fcoe_ddp_setup     = vlan_dev_fcoe_ddp_setup,
 683         .ndo_fcoe_ddp_done      = vlan_dev_fcoe_ddp_done,
 684         .ndo_fcoe_enable        = vlan_dev_fcoe_enable,
 685         .ndo_fcoe_disable       = vlan_dev_fcoe_disable,
 686         .ndo_fcoe_get_wwn       = vlan_dev_fcoe_get_wwn,
 687         .ndo_fcoe_ddp_target    = vlan_dev_fcoe_ddp_target,
 688 #endif
 689         .ndo_fix_features       = vlan_dev_fix_features,
 690 };
 691
 692 void vlan_setup(struct net_device *dev)
 693 {
 694         ether_setup(dev);
 695
 696         dev->priv_flags         |= IFF_802_1Q_VLAN;
 697         dev->priv_flags         &= ~IFF_XMIT_DST_RELEASE;
 698         dev->tx_queue_len       = 0;
 699
 700         dev->netdev_ops         = &vlan_netdev_ops;
 701         dev->destructor         = free_netdev;
 702         dev->ethtool_ops        = &vlan_ethtool_ops;
 703
 704         memset(dev->broadcast, 0, ETH_ALEN);
 705 }