/* -*- linux-c -*-
   * INET		802.1Q VLAN
   *		Ethernet-type device handling.
   *
   * Authors:	Ben Greear <greearb@candelatech.com>

   *              Please send support related email to: netdev@vger.kernel.org

   *              VLAN Home Page: http://www.candelatech.com/~greear/vlan.html

   *

   * Fixes:       Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com>
   *                - reset skb->pkt_type on incoming packets when MAC was changed
   *                - see that changed MAC is saddr for outgoing packets
   *              Oct 20, 2001:  Ard van Breeman:
   *                - Fix MC-list, finally.
   *                - Flush MC-list on VLAN destroy.

   *

   *
   *		This program is free software; you can redistribute it and/or
   *		modify it under the terms of the GNU General Public License
   *		as published by the Free Software Foundation; either version
   *		2 of the License, or (at your option) any later version.
   */
  
  #include <linux/module.h>

  #include <linux/slab.h>

  #include <linux/skbuff.h>
  #include <linux/netdevice.h>
  #include <linux/etherdevice.h>

  #include <linux/ethtool.h>

  #include <net/arp.h>
  
  #include "vlan.h"
  #include "vlanproc.h"
  #include <linux/if_vlan.h>

  
  /*
   *	Rebuild the Ethernet MAC header. This is called after an ARP
   *	(or in future other address resolution) has completed on this
   *	sk_buff. We now let ARP fill in the other fields.
   *
   *	This routine CANNOT use cached dst->neigh!
   *	Really, it is used only when dst->neigh is wrong.
   *
   * TODO:  This needs a checkup, I'm ignorant here. --BLG
   */

  static int vlan_dev_rebuild_header(struct sk_buff *skb)

  {
  	struct net_device *dev = skb->dev;
  	struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
  
  	switch (veth->h_vlan_encapsulated_proto) {
  #ifdef CONFIG_INET

  	case htons(ETH_P_IP):

  
  		/* TODO:  Confirm this will work with VLAN headers... */
  		return arp_find(veth->h_dest, skb);

  #endif

  	default:

  		pr_debug("%s: unable to resolve type %X addresses.
  ",
  			 dev->name, ntohs(veth->h_vlan_encapsulated_proto));

  		memcpy(veth->h_source, dev->dev_addr, ETH_ALEN);
  		break;

  	}

  
  	return 0;
  }

  static inline u16

  vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb)

  {

  	struct vlan_priority_tci_mapping *mp;

  	mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)];

  	while (mp) {
  		if (mp->priority == skb->priority) {

  			return mp->vlan_qos; /* This should already be shifted
  					      * to mask correctly with the
  					      * VLAN's TCI */

  		}
  		mp = mp->next;
  	}
  	return 0;
  }
  
  /*

   *	Create the VLAN header for an arbitrary protocol layer

   *
   *	saddr=NULL	means use device source address
   *	daddr=NULL	means leave destination address (eg unresolved arp)
   *
   *  This is called when the SKB is moving down the stack towards the
   *  physical devices.
   */

  static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
  				unsigned short type,
  				const void *daddr, const void *saddr,
  				unsigned int len)

  {
  	struct vlan_hdr *vhdr;

  	unsigned int vhdrlen = 0;

  	u16 vlan_tci = 0;

  	int rc;

  	if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) {

  		vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);

  		vlan_tci = vlan_dev_info(dev)->vlan_id;
  		vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);

  		vhdr->h_vlan_TCI = htons(vlan_tci);

  
  		/*

  		 *  Set the protocol type. For a packet of type ETH_P_802_3/2 we
  		 *  put the length in here instead.

  		 */

  		if (type != ETH_P_802_3 && type != ETH_P_802_2)

  			vhdr->h_vlan_encapsulated_proto = htons(type);

  		else

  			vhdr->h_vlan_encapsulated_proto = htons(len);

  
  		skb->protocol = htons(ETH_P_8021Q);

  		type = ETH_P_8021Q;
  		vhdrlen = VLAN_HLEN;

  	}
  
  	/* Before delegating work to the lower layer, enter our MAC-address */
  	if (saddr == NULL)
  		saddr = dev->dev_addr;

  	/* Now make the underlying real hard header */

  	dev = vlan_dev_info(dev)->real_dev;

  	rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
  	if (rc > 0)
  		rc += vhdrlen;

  	return rc;
  }

  static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
  					    struct net_device *dev)

  {

  	struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);

  	unsigned int len;
  	int ret;

  	/* Handle non-VLAN frames if they are sent to us, for example by DHCP.
  	 *
  	 * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
  	 * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
  	 */

  	if (veth->h_vlan_proto != htons(ETH_P_8021Q) ||

  	    vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) {

  		u16 vlan_tci;

  		vlan_tci = vlan_dev_info(dev)->vlan_id;
  		vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);

  		skb = __vlan_hwaccel_put_tag(skb, vlan_tci);

  	}

  	skb_set_dev(skb, vlan_dev_info(dev)->real_dev);

  	len = skb->len;
  	ret = dev_queue_xmit(skb);

  	if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {

  		struct vlan_pcpu_stats *stats;
  
  		stats = this_cpu_ptr(vlan_dev_info(dev)->vlan_pcpu_stats);
  		u64_stats_update_begin(&stats->syncp);
  		stats->tx_packets++;
  		stats->tx_bytes += len;

  		u64_stats_update_end(&stats->syncp);

  	} else {
  		this_cpu_inc(vlan_dev_info(dev)->vlan_pcpu_stats->tx_dropped);
  	}

  	return ret;

  }

  static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)

  {
  	/* TODO: gotta make sure the underlying layer can handle it,
  	 * maybe an IFF_VLAN_CAPABLE flag for devices?
  	 */

  	if (vlan_dev_info(dev)->real_dev->mtu < new_mtu)

  		return -ERANGE;
  
  	dev->mtu = new_mtu;
  
  	return 0;
  }

  void vlan_dev_set_ingress_priority(const struct net_device *dev,

  				   u32 skb_prio, u16 vlan_prio)

  {

  	struct vlan_dev_info *vlan = vlan_dev_info(dev);

  
  	if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
  		vlan->nr_ingress_mappings--;
  	else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
  		vlan->nr_ingress_mappings++;
  
  	vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;

  }

  int vlan_dev_set_egress_priority(const struct net_device *dev,

  				 u32 skb_prio, u16 vlan_prio)

  {

  	struct vlan_dev_info *vlan = vlan_dev_info(dev);

  	struct vlan_priority_tci_mapping *mp = NULL;
  	struct vlan_priority_tci_mapping *np;

  	u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;

  	/* See if a priority mapping exists.. */

  	mp = vlan->egress_priority_map[skb_prio & 0xF];

  	while (mp) {
  		if (mp->priority == skb_prio) {

  			if (mp->vlan_qos && !vlan_qos)
  				vlan->nr_egress_mappings--;
  			else if (!mp->vlan_qos && vlan_qos)
  				vlan->nr_egress_mappings++;
  			mp->vlan_qos = vlan_qos;

  			return 0;

  		}

  		mp = mp->next;

  	}

  
  	/* Create a new mapping then. */

  	mp = vlan->egress_priority_map[skb_prio & 0xF];

  	np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
  	if (!np)
  		return -ENOBUFS;
  
  	np->next = mp;
  	np->priority = skb_prio;

  	np->vlan_qos = vlan_qos;
  	vlan->egress_priority_map[skb_prio & 0xF] = np;
  	if (vlan_qos)
  		vlan->nr_egress_mappings++;

  	return 0;

  }

  /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */

  int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)

  {

  	struct vlan_dev_info *vlan = vlan_dev_info(dev);
  	u32 old_flags = vlan->flags;

  	if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
  		     VLAN_FLAG_LOOSE_BINDING))

  		return -EINVAL;
  
  	vlan->flags = (old_flags & ~mask) | (flags & mask);

  
  	if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
  		if (vlan->flags & VLAN_FLAG_GVRP)
  			vlan_gvrp_request_join(dev);
  		else
  			vlan_gvrp_request_leave(dev);
  	}

  	return 0;

  }

  void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)

  {

  	strncpy(result, vlan_dev_info(dev)->real_dev->name, 23);

  }

  static int vlan_dev_open(struct net_device *dev)

  {

  	struct vlan_dev_info *vlan = vlan_dev_info(dev);

  	struct net_device *real_dev = vlan->real_dev;
  	int err;

  	if (!(real_dev->flags & IFF_UP) &&
  	    !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))

  		return -ENETDOWN;

  	if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) {

  		err = dev_uc_add(real_dev, dev->dev_addr);

  		if (err < 0)

  			goto out;

  	}

  	if (dev->flags & IFF_ALLMULTI) {
  		err = dev_set_allmulti(real_dev, 1);
  		if (err < 0)
  			goto del_unicast;
  	}
  	if (dev->flags & IFF_PROMISC) {
  		err = dev_set_promiscuity(real_dev, 1);
  		if (err < 0)
  			goto clear_allmulti;
  	}
  
  	memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);

  	if (vlan->flags & VLAN_FLAG_GVRP)
  		vlan_gvrp_request_join(dev);

  	if (netif_carrier_ok(real_dev))
  		netif_carrier_on(dev);

  	return 0;

  
  clear_allmulti:
  	if (dev->flags & IFF_ALLMULTI)
  		dev_set_allmulti(real_dev, -1);
  del_unicast:
  	if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))

  		dev_uc_del(real_dev, dev->dev_addr);

  out:

  	netif_carrier_off(dev);

  	return err;

  }

  static int vlan_dev_stop(struct net_device *dev)

  {

  	struct vlan_dev_info *vlan = vlan_dev_info(dev);
  	struct net_device *real_dev = vlan->real_dev;

  	dev_mc_unsync(real_dev, dev);

  	dev_uc_unsync(real_dev, dev);

  	if (dev->flags & IFF_ALLMULTI)
  		dev_set_allmulti(real_dev, -1);
  	if (dev->flags & IFF_PROMISC)
  		dev_set_promiscuity(real_dev, -1);

  	if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))

  		dev_uc_del(real_dev, dev->dev_addr);

  	netif_carrier_off(dev);

  	return 0;
  }

  static int vlan_dev_set_mac_address(struct net_device *dev, void *p)

  {

  	struct net_device *real_dev = vlan_dev_info(dev)->real_dev;

  	struct sockaddr *addr = p;
  	int err;
  
  	if (!is_valid_ether_addr(addr->sa_data))
  		return -EADDRNOTAVAIL;
  
  	if (!(dev->flags & IFF_UP))
  		goto out;
  
  	if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) {

  		err = dev_uc_add(real_dev, addr->sa_data);

  		if (err < 0)
  			return err;
  	}
  
  	if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))

  		dev_uc_del(real_dev, dev->dev_addr);

  
  out:
  	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
  	return 0;
  }

  static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)

  {

  	struct net_device *real_dev = vlan_dev_info(dev)->real_dev;

  	const struct net_device_ops *ops = real_dev->netdev_ops;

  	struct ifreq ifrr;
  	int err = -EOPNOTSUPP;
  
  	strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
  	ifrr.ifr_ifru = ifr->ifr_ifru;

  	switch (cmd) {

  	case SIOCGMIIPHY:
  	case SIOCGMIIREG:
  	case SIOCSMIIREG:

  		if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
  			err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);

  		break;

  	}

  	if (!err)

  		ifr->ifr_ifru = ifrr.ifr_ifru;
  
  	return err;
  }

  static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
  {
  	struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
  	const struct net_device_ops *ops = real_dev->netdev_ops;
  	int err = 0;
  
  	if (netif_device_present(real_dev) && ops->ndo_neigh_setup)

  		err = ops->ndo_neigh_setup(real_dev, pa);

  
  	return err;
  }

  #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
  static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
  				   struct scatterlist *sgl, unsigned int sgc)
  {
  	struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
  	const struct net_device_ops *ops = real_dev->netdev_ops;
  	int rc = 0;
  
  	if (ops->ndo_fcoe_ddp_setup)
  		rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);
  
  	return rc;
  }
  
  static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
  {
  	struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
  	const struct net_device_ops *ops = real_dev->netdev_ops;
  	int len = 0;
  
  	if (ops->ndo_fcoe_ddp_done)
  		len = ops->ndo_fcoe_ddp_done(real_dev, xid);
  
  	return len;
  }

  
  static int vlan_dev_fcoe_enable(struct net_device *dev)
  {
  	struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
  	const struct net_device_ops *ops = real_dev->netdev_ops;
  	int rc = -EINVAL;
  
  	if (ops->ndo_fcoe_enable)
  		rc = ops->ndo_fcoe_enable(real_dev);
  	return rc;
  }
  
  static int vlan_dev_fcoe_disable(struct net_device *dev)
  {
  	struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
  	const struct net_device_ops *ops = real_dev->netdev_ops;
  	int rc = -EINVAL;
  
  	if (ops->ndo_fcoe_disable)
  		rc = ops->ndo_fcoe_disable(real_dev);
  	return rc;
  }

  
  static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
  {
  	struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
  	const struct net_device_ops *ops = real_dev->netdev_ops;
  	int rc = -EINVAL;
  
  	if (ops->ndo_fcoe_get_wwn)
  		rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
  	return rc;
  }

  
  static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
  				    struct scatterlist *sgl, unsigned int sgc)
  {
  	struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
  	const struct net_device_ops *ops = real_dev->netdev_ops;
  	int rc = 0;
  
  	if (ops->ndo_fcoe_ddp_target)
  		rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);
  
  	return rc;
  }

  #endif

  static void vlan_dev_change_rx_flags(struct net_device *dev, int change)

  {

  	struct net_device *real_dev = vlan_dev_info(dev)->real_dev;

  
  	if (change & IFF_ALLMULTI)
  		dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
  	if (change & IFF_PROMISC)
  		dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
  }

  static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)

  {

  	dev_mc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev);

  	dev_uc_sync(vlan_dev_info(vlan_dev)->real_dev, vlan_dev);

  }

  
  /*
   * vlan network devices have devices nesting below it, and are a special
   * "super class" of normal network devices; split their locks off into a
   * separate class since they always nest.
   */
  static struct lock_class_key vlan_netdev_xmit_lock_key;

  static struct lock_class_key vlan_netdev_addr_lock_key;

  static void vlan_dev_set_lockdep_one(struct net_device *dev,
  				     struct netdev_queue *txq,
  				     void *_subclass)

  {
  	lockdep_set_class_and_subclass(&txq->_xmit_lock,

  				       &vlan_netdev_xmit_lock_key,
  				       *(int *)_subclass);

  }
  
  static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
  {

  	lockdep_set_class_and_subclass(&dev->addr_list_lock,
  				       &vlan_netdev_addr_lock_key,
  				       subclass);

  	netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);

  }

  static const struct header_ops vlan_header_ops = {
  	.create	 = vlan_dev_hard_header,
  	.rebuild = vlan_dev_rebuild_header,
  	.parse	 = eth_header_parse,
  };

  static const struct net_device_ops vlan_netdev_ops;

  static int vlan_dev_init(struct net_device *dev)
  {

  	struct net_device *real_dev = vlan_dev_info(dev)->real_dev;

  	int subclass = 0;

  	netif_carrier_off(dev);

  	/* IFF_BROADCAST|IFF_MULTICAST; ??? */

  	dev->flags  = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
  					  IFF_MASTER | IFF_SLAVE);

  	dev->iflink = real_dev->ifindex;
  	dev->state  = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
  					  (1<<__LINK_STATE_DORMANT))) |
  		      (1<<__LINK_STATE_PRESENT);

  	dev->hw_features = NETIF_F_ALL_TX_OFFLOADS;

  	dev->features |= real_dev->vlan_features | NETIF_F_LLTX;

  	dev->gso_max_size = real_dev->gso_max_size;

  	/* ipv6 shared card related stuff */
  	dev->dev_id = real_dev->dev_id;
  
  	if (is_zero_ether_addr(dev->dev_addr))
  		memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len);
  	if (is_zero_ether_addr(dev->broadcast))
  		memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);

  #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
  	dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
  #endif

  	dev->needed_headroom = real_dev->needed_headroom;

  	if (real_dev->features & NETIF_F_HW_VLAN_TX) {
  		dev->header_ops      = real_dev->header_ops;
  		dev->hard_header_len = real_dev->hard_header_len;

  	} else {
  		dev->header_ops      = &vlan_header_ops;
  		dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;

  	}

  	dev->netdev_ops = &vlan_netdev_ops;

  	if (is_vlan_dev(real_dev))

  		subclass = 1;

  	vlan_dev_set_lockdep_class(dev, subclass);

  	vlan_dev_info(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats);
  	if (!vlan_dev_info(dev)->vlan_pcpu_stats)

  		return -ENOMEM;

  	return 0;
  }

  static void vlan_dev_uninit(struct net_device *dev)
  {
  	struct vlan_priority_tci_mapping *pm;
  	struct vlan_dev_info *vlan = vlan_dev_info(dev);
  	int i;

  	free_percpu(vlan->vlan_pcpu_stats);
  	vlan->vlan_pcpu_stats = NULL;

  	for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
  		while ((pm = vlan->egress_priority_map[i]) != NULL) {
  			vlan->egress_priority_map[i] = pm->next;
  			kfree(pm);
  		}
  	}
  }

  static u32 vlan_dev_fix_features(struct net_device *dev, u32 features)
  {
  	struct net_device *real_dev = vlan_dev_info(dev)->real_dev;

  	features &= real_dev->features;
  	features &= real_dev->vlan_features;

  	if (dev_ethtool_get_rx_csum(real_dev))
  		features |= NETIF_F_RXCSUM;

  	features |= NETIF_F_LLTX;

  
  	return features;
  }

  static int vlan_ethtool_get_settings(struct net_device *dev,
  				     struct ethtool_cmd *cmd)
  {
  	const struct vlan_dev_info *vlan = vlan_dev_info(dev);

  	return dev_ethtool_get_settings(vlan->real_dev, cmd);

  }
  
  static void vlan_ethtool_get_drvinfo(struct net_device *dev,
  				     struct ethtool_drvinfo *info)
  {
  	strcpy(info->driver, vlan_fullname);
  	strcpy(info->version, vlan_version);
  	strcpy(info->fw_version, "N/A");
  }

  static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)

  {

  	if (vlan_dev_info(dev)->vlan_pcpu_stats) {
  		struct vlan_pcpu_stats *p;
  		u32 rx_errors = 0, tx_dropped = 0;

  		int i;
  
  		for_each_possible_cpu(i) {

  			u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes;

  			unsigned int start;

  			p = per_cpu_ptr(vlan_dev_info(dev)->vlan_pcpu_stats, i);

  			do {
  				start = u64_stats_fetch_begin_bh(&p->syncp);
  				rxpackets	= p->rx_packets;
  				rxbytes		= p->rx_bytes;
  				rxmulticast	= p->rx_multicast;

  				txpackets	= p->tx_packets;
  				txbytes		= p->tx_bytes;

  			} while (u64_stats_fetch_retry_bh(&p->syncp, start));

  
  			stats->rx_packets	+= rxpackets;
  			stats->rx_bytes		+= rxbytes;
  			stats->multicast	+= rxmulticast;
  			stats->tx_packets	+= txpackets;
  			stats->tx_bytes		+= txbytes;
  			/* rx_errors & tx_dropped are u32 */
  			rx_errors	+= p->rx_errors;
  			tx_dropped	+= p->tx_dropped;

  		}

  		stats->rx_errors  = rx_errors;
  		stats->tx_dropped = tx_dropped;

  	}
  	return stats;
  }

  static const struct ethtool_ops vlan_ethtool_ops = {

  	.get_settings	        = vlan_ethtool_get_settings,
  	.get_drvinfo	        = vlan_ethtool_get_drvinfo,

  	.get_link		= ethtool_op_get_link,

  };

  static const struct net_device_ops vlan_netdev_ops = {
  	.ndo_change_mtu		= vlan_dev_change_mtu,
  	.ndo_init		= vlan_dev_init,
  	.ndo_uninit		= vlan_dev_uninit,
  	.ndo_open		= vlan_dev_open,
  	.ndo_stop		= vlan_dev_stop,

  	.ndo_start_xmit =  vlan_dev_hard_start_xmit,
  	.ndo_validate_addr	= eth_validate_addr,
  	.ndo_set_mac_address	= vlan_dev_set_mac_address,
  	.ndo_set_rx_mode	= vlan_dev_set_rx_mode,
  	.ndo_set_multicast_list	= vlan_dev_set_rx_mode,
  	.ndo_change_rx_flags	= vlan_dev_change_rx_flags,
  	.ndo_do_ioctl		= vlan_dev_ioctl,
  	.ndo_neigh_setup	= vlan_dev_neigh_setup,

  	.ndo_get_stats64	= vlan_dev_get_stats64,

  #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
  	.ndo_fcoe_ddp_setup	= vlan_dev_fcoe_ddp_setup,
  	.ndo_fcoe_ddp_done	= vlan_dev_fcoe_ddp_done,
  	.ndo_fcoe_enable	= vlan_dev_fcoe_enable,
  	.ndo_fcoe_disable	= vlan_dev_fcoe_disable,
  	.ndo_fcoe_get_wwn	= vlan_dev_fcoe_get_wwn,

  	.ndo_fcoe_ddp_target	= vlan_dev_fcoe_ddp_target,

  #endif

  	.ndo_fix_features	= vlan_dev_fix_features,

  };

  void vlan_setup(struct net_device *dev)
  {
  	ether_setup(dev);
  
  	dev->priv_flags		|= IFF_802_1Q_VLAN;

  	dev->priv_flags		&= ~IFF_XMIT_DST_RELEASE;

  	dev->tx_queue_len	= 0;

  	dev->netdev_ops		= &vlan_netdev_ops;

  	dev->destructor		= free_netdev;

  	dev->ethtool_ops	= &vlan_ethtool_ops;

  
  	memset(dev->broadcast, 0, ETH_ALEN);
  }