739 lines
20 KiB
C
739 lines
20 KiB
C
/* -*- linux-c -*-
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* INET 802.1Q VLAN
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* Ethernet-type device handling.
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*
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* Authors: Ben Greear <greearb@candelatech.com>
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* Please send support related email to: netdev@vger.kernel.org
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* VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
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*
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* Fixes: Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com>
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* - reset skb->pkt_type on incoming packets when MAC was changed
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* - see that changed MAC is saddr for outgoing packets
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* Oct 20, 2001: Ard van Breeman:
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* - Fix MC-list, finally.
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* - Flush MC-list on VLAN destroy.
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/in.h>
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#include <linux/init.h>
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#include <asm/uaccess.h> /* for copy_from_user */
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <net/datalink.h>
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#include <net/p8022.h>
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#include <net/arp.h>
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#include "vlan.h"
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#include "vlanproc.h"
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#include <linux/if_vlan.h>
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#include <net/ip.h>
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/*
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* Rebuild the Ethernet MAC header. This is called after an ARP
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* (or in future other address resolution) has completed on this
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* sk_buff. We now let ARP fill in the other fields.
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*
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* This routine CANNOT use cached dst->neigh!
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* Really, it is used only when dst->neigh is wrong.
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*
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* TODO: This needs a checkup, I'm ignorant here. --BLG
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*/
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static int vlan_dev_rebuild_header(struct sk_buff *skb)
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{
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struct net_device *dev = skb->dev;
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struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
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switch (veth->h_vlan_encapsulated_proto) {
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#ifdef CONFIG_INET
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case __constant_htons(ETH_P_IP):
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/* TODO: Confirm this will work with VLAN headers... */
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return arp_find(veth->h_dest, skb);
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#endif
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default:
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pr_debug("%s: unable to resolve type %X addresses.\n",
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dev->name, ntohs(veth->h_vlan_encapsulated_proto));
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memcpy(veth->h_source, dev->dev_addr, ETH_ALEN);
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break;
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}
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return 0;
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}
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static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb)
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{
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if (vlan_dev_info(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) {
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if (skb_cow(skb, skb_headroom(skb)) < 0)
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skb = NULL;
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if (skb) {
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/* Lifted from Gleb's VLAN code... */
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memmove(skb->data - ETH_HLEN,
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skb->data - VLAN_ETH_HLEN, 12);
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skb->mac_header += VLAN_HLEN;
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}
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}
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return skb;
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}
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static inline void vlan_set_encap_proto(struct sk_buff *skb,
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struct vlan_hdr *vhdr)
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{
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__be16 proto;
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unsigned char *rawp;
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/*
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* Was a VLAN packet, grab the encapsulated protocol, which the layer
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* three protocols care about.
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*/
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proto = vhdr->h_vlan_encapsulated_proto;
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if (ntohs(proto) >= 1536) {
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skb->protocol = proto;
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return;
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}
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rawp = skb->data;
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if (*(unsigned short *)rawp == 0xFFFF)
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/*
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* This is a magic hack to spot IPX packets. Older Novell
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* breaks the protocol design and runs IPX over 802.3 without
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* an 802.2 LLC layer. We look for FFFF which isn't a used
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* 802.2 SSAP/DSAP. This won't work for fault tolerant netware
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* but does for the rest.
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*/
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skb->protocol = htons(ETH_P_802_3);
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else
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/*
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* Real 802.2 LLC
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*/
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skb->protocol = htons(ETH_P_802_2);
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}
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/*
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* Determine the packet's protocol ID. The rule here is that we
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* assume 802.3 if the type field is short enough to be a length.
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* This is normal practice and works for any 'now in use' protocol.
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*
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* Also, at this point we assume that we ARE dealing exclusively with
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* VLAN packets, or packets that should be made into VLAN packets based
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* on a default VLAN ID.
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*
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* NOTE: Should be similar to ethernet/eth.c.
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*
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* SANITY NOTE: This method is called when a packet is moving up the stack
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* towards userland. To get here, it would have already passed
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* through the ethernet/eth.c eth_type_trans() method.
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* SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be
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* stored UNALIGNED in the memory. RISC systems don't like
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* such cases very much...
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* SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be
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* aligned, so there doesn't need to be any of the unaligned
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* stuff. It has been commented out now... --Ben
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*
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*/
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int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
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struct packet_type *ptype, struct net_device *orig_dev)
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{
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struct vlan_hdr *vhdr;
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struct net_device_stats *stats;
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u16 vlan_id;
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u16 vlan_tci;
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skb = skb_share_check(skb, GFP_ATOMIC);
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if (skb == NULL)
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goto err_free;
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if (unlikely(!pskb_may_pull(skb, VLAN_HLEN)))
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goto err_free;
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vhdr = (struct vlan_hdr *)skb->data;
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vlan_tci = ntohs(vhdr->h_vlan_TCI);
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vlan_id = vlan_tci & VLAN_VID_MASK;
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rcu_read_lock();
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skb->dev = __find_vlan_dev(dev, vlan_id);
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if (!skb->dev) {
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pr_debug("%s: ERROR: No net_device for VID: %u on dev: %s\n",
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__func__, vlan_id, dev->name);
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goto err_unlock;
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}
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skb->dev->last_rx = jiffies;
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stats = &skb->dev->stats;
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stats->rx_packets++;
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stats->rx_bytes += skb->len;
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skb_pull_rcsum(skb, VLAN_HLEN);
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skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tci);
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pr_debug("%s: priority: %u for TCI: %hu\n",
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__func__, skb->priority, vlan_tci);
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switch (skb->pkt_type) {
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case PACKET_BROADCAST: /* Yeah, stats collect these together.. */
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/* stats->broadcast ++; // no such counter :-( */
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break;
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case PACKET_MULTICAST:
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stats->multicast++;
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break;
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case PACKET_OTHERHOST:
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/* Our lower layer thinks this is not local, let's make sure.
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* This allows the VLAN to have a different MAC than the
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* underlying device, and still route correctly.
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*/
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if (!compare_ether_addr(eth_hdr(skb)->h_dest,
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skb->dev->dev_addr))
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skb->pkt_type = PACKET_HOST;
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break;
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default:
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break;
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}
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vlan_set_encap_proto(skb, vhdr);
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skb = vlan_check_reorder_header(skb);
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if (!skb) {
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stats->rx_errors++;
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goto err_unlock;
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}
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netif_rx(skb);
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rcu_read_unlock();
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return NET_RX_SUCCESS;
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err_unlock:
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rcu_read_unlock();
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err_free:
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kfree_skb(skb);
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return NET_RX_DROP;
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}
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static inline u16
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vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb)
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{
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struct vlan_priority_tci_mapping *mp;
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mp = vlan_dev_info(dev)->egress_priority_map[(skb->priority & 0xF)];
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while (mp) {
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if (mp->priority == skb->priority) {
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return mp->vlan_qos; /* This should already be shifted
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* to mask correctly with the
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* VLAN's TCI */
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}
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mp = mp->next;
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}
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return 0;
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}
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/*
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* Create the VLAN header for an arbitrary protocol layer
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*
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* saddr=NULL means use device source address
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* daddr=NULL means leave destination address (eg unresolved arp)
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*
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* This is called when the SKB is moving down the stack towards the
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* physical devices.
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*/
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static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
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unsigned short type,
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const void *daddr, const void *saddr,
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unsigned int len)
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{
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struct vlan_hdr *vhdr;
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u16 vlan_tci = 0;
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int rc = 0;
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int build_vlan_header = 0;
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pr_debug("%s: skb: %p type: %hx len: %u vlan_id: %hx, daddr: %p\n",
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__func__, skb, type, len, vlan_dev_info(dev)->vlan_id,
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daddr);
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if (WARN_ON(skb_headroom(skb) < dev->hard_header_len))
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return -ENOSPC;
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/* build vlan header only if re_order_header flag is NOT set. This
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* fixes some programs that get confused when they see a VLAN device
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* sending a frame that is VLAN encoded (the consensus is that the VLAN
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* device should look completely like an Ethernet device when the
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* REORDER_HEADER flag is set) The drawback to this is some extra
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* header shuffling in the hard_start_xmit. Users can turn off this
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* REORDER behaviour with the vconfig tool.
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*/
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if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR))
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build_vlan_header = 1;
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if (build_vlan_header) {
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vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
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/* build the four bytes that make this a VLAN header. */
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/* Now, construct the second two bytes. This field looks
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* something like:
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* usr_priority: 3 bits (high bits)
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* CFI 1 bit
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* VLAN ID 12 bits (low bits)
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*
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*/
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vlan_tci = vlan_dev_info(dev)->vlan_id;
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vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
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vhdr->h_vlan_TCI = htons(vlan_tci);
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/*
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* Set the protocol type. For a packet of type ETH_P_802_3 we
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* put the length in here instead. It is up to the 802.2
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* layer to carry protocol information.
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*/
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if (type != ETH_P_802_3)
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vhdr->h_vlan_encapsulated_proto = htons(type);
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else
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vhdr->h_vlan_encapsulated_proto = htons(len);
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skb->protocol = htons(ETH_P_8021Q);
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}
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/* Before delegating work to the lower layer, enter our MAC-address */
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if (saddr == NULL)
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saddr = dev->dev_addr;
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dev = vlan_dev_info(dev)->real_dev;
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if (build_vlan_header) {
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/* Now make the underlying real hard header */
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rc = dev_hard_header(skb, dev, ETH_P_8021Q, daddr, saddr,
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len + VLAN_HLEN);
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if (rc > 0)
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rc += VLAN_HLEN;
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else if (rc < 0)
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rc -= VLAN_HLEN;
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} else
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/* If here, then we'll just make a normal looking ethernet
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* frame, but, the hard_start_xmit method will insert the tag
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* (it has to be able to do this for bridged and other skbs
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* that don't come down the protocol stack in an orderly manner.
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*/
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rc = dev_hard_header(skb, dev, type, daddr, saddr, len);
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return rc;
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}
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static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct net_device_stats *stats = &dev->stats;
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struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
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/* Handle non-VLAN frames if they are sent to us, for example by DHCP.
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*
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* NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
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* OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
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*/
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if (veth->h_vlan_proto != htons(ETH_P_8021Q) ||
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vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) {
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int orig_headroom = skb_headroom(skb);
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u16 vlan_tci;
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/* This is not a VLAN frame...but we can fix that! */
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vlan_dev_info(dev)->cnt_encap_on_xmit++;
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pr_debug("%s: proto to encap: 0x%hx\n",
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__func__, ntohs(veth->h_vlan_proto));
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/* Construct the second two bytes. This field looks something
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* like:
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* usr_priority: 3 bits (high bits)
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* CFI 1 bit
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* VLAN ID 12 bits (low bits)
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*/
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vlan_tci = vlan_dev_info(dev)->vlan_id;
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vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
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skb = __vlan_put_tag(skb, vlan_tci);
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if (!skb) {
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stats->tx_dropped++;
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return 0;
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}
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if (orig_headroom < VLAN_HLEN)
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vlan_dev_info(dev)->cnt_inc_headroom_on_tx++;
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}
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pr_debug("%s: about to send skb: %p to dev: %s\n",
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__func__, skb, skb->dev->name);
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pr_debug(" " MAC_FMT " " MAC_FMT " %4hx %4hx %4hx\n",
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veth->h_dest[0], veth->h_dest[1], veth->h_dest[2],
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veth->h_dest[3], veth->h_dest[4], veth->h_dest[5],
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veth->h_source[0], veth->h_source[1], veth->h_source[2],
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veth->h_source[3], veth->h_source[4], veth->h_source[5],
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veth->h_vlan_proto, veth->h_vlan_TCI,
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veth->h_vlan_encapsulated_proto);
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stats->tx_packets++; /* for statics only */
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stats->tx_bytes += skb->len;
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skb->dev = vlan_dev_info(dev)->real_dev;
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dev_queue_xmit(skb);
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return 0;
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}
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|
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static int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb,
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struct net_device *dev)
|
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{
|
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struct net_device_stats *stats = &dev->stats;
|
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u16 vlan_tci;
|
|
|
|
/* Construct the second two bytes. This field looks something
|
|
* like:
|
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* usr_priority: 3 bits (high bits)
|
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* CFI 1 bit
|
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* VLAN ID 12 bits (low bits)
|
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*/
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vlan_tci = vlan_dev_info(dev)->vlan_id;
|
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vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
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skb = __vlan_hwaccel_put_tag(skb, vlan_tci);
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stats->tx_packets++;
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stats->tx_bytes += skb->len;
|
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|
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skb->dev = vlan_dev_info(dev)->real_dev;
|
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dev_queue_xmit(skb);
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|
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return 0;
|
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}
|
|
|
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static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
|
|
{
|
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/* TODO: gotta make sure the underlying layer can handle it,
|
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* maybe an IFF_VLAN_CAPABLE flag for devices?
|
|
*/
|
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if (vlan_dev_info(dev)->real_dev->mtu < new_mtu)
|
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return -ERANGE;
|
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|
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dev->mtu = new_mtu;
|
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|
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return 0;
|
|
}
|
|
|
|
void vlan_dev_set_ingress_priority(const struct net_device *dev,
|
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u32 skb_prio, u16 vlan_prio)
|
|
{
|
|
struct vlan_dev_info *vlan = vlan_dev_info(dev);
|
|
|
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if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
|
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vlan->nr_ingress_mappings--;
|
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else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
|
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vlan->nr_ingress_mappings++;
|
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|
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vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
|
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}
|
|
|
|
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;
|
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u32 vlan_qos = (vlan_prio << 13) & 0xE000;
|
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|
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/* See if a priority mapping exists.. */
|
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mp = vlan->egress_priority_map[skb_prio & 0xF];
|
|
while (mp) {
|
|
if (mp->priority == skb_prio) {
|
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if (mp->vlan_qos && !vlan_qos)
|
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vlan->nr_egress_mappings--;
|
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else if (!mp->vlan_qos && vlan_qos)
|
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vlan->nr_egress_mappings++;
|
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mp->vlan_qos = vlan_qos;
|
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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))
|
|
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))
|
|
return -ENETDOWN;
|
|
|
|
if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) {
|
|
err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN);
|
|
|
|
if (dev->flags & IFF_ALLMULTI)
|
|
dev_set_allmulti(real_dev, 1);
|
|
if (dev->flags & IFF_PROMISC)
|
|
dev_set_promiscuity(real_dev, 1);
|
|
|
|
if (vlan->flags & VLAN_FLAG_GVRP)
|
|
vlan_gvrp_request_join(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
|
|
if (vlan->flags & VLAN_FLAG_GVRP)
|
|
vlan_gvrp_request_leave(dev);
|
|
|
|
dev_mc_unsync(real_dev, dev);
|
|
dev_unicast_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_unicast_delete(real_dev, dev->dev_addr, dev->addr_len);
|
|
|
|
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_unicast_add(real_dev, addr->sa_data, ETH_ALEN);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
|
|
dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN);
|
|
|
|
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;
|
|
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 (real_dev->do_ioctl && netif_device_present(real_dev))
|
|
err = real_dev->do_ioctl(real_dev, &ifrr, cmd);
|
|
break;
|
|
}
|
|
|
|
if (!err)
|
|
ifr->ifr_ifru = ifrr.ifr_ifru;
|
|
|
|
return err;
|
|
}
|
|
|
|
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_unicast_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 void vlan_dev_set_lockdep_one(struct netdev_queue *txq,
|
|
int subclass)
|
|
{
|
|
lockdep_set_class_and_subclass(&txq->_xmit_lock,
|
|
&vlan_netdev_xmit_lock_key, subclass);
|
|
}
|
|
|
|
static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
|
|
{
|
|
vlan_dev_set_lockdep_one(&dev->tx_queue, subclass);
|
|
}
|
|
|
|
static const struct header_ops vlan_header_ops = {
|
|
.create = vlan_dev_hard_header,
|
|
.rebuild = vlan_dev_rebuild_header,
|
|
.parse = eth_header_parse,
|
|
};
|
|
|
|
static int vlan_dev_init(struct net_device *dev)
|
|
{
|
|
struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
|
|
int subclass = 0;
|
|
|
|
/* IFF_BROADCAST|IFF_MULTICAST; ??? */
|
|
dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI);
|
|
dev->iflink = real_dev->ifindex;
|
|
dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
|
|
(1<<__LINK_STATE_DORMANT))) |
|
|
(1<<__LINK_STATE_PRESENT);
|
|
|
|
dev->features |= real_dev->features & real_dev->vlan_features;
|
|
|
|
/* 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 (real_dev->features & NETIF_F_HW_VLAN_TX) {
|
|
dev->header_ops = real_dev->header_ops;
|
|
dev->hard_header_len = real_dev->hard_header_len;
|
|
dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit;
|
|
} else {
|
|
dev->header_ops = &vlan_header_ops;
|
|
dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
|
|
dev->hard_start_xmit = vlan_dev_hard_start_xmit;
|
|
}
|
|
|
|
if (is_vlan_dev(real_dev))
|
|
subclass = 1;
|
|
|
|
vlan_dev_set_lockdep_class(dev, subclass);
|
|
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;
|
|
|
|
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_ethtool_get_rx_csum(struct net_device *dev)
|
|
{
|
|
const struct vlan_dev_info *vlan = vlan_dev_info(dev);
|
|
struct net_device *real_dev = vlan->real_dev;
|
|
|
|
if (real_dev->ethtool_ops == NULL ||
|
|
real_dev->ethtool_ops->get_rx_csum == NULL)
|
|
return 0;
|
|
return real_dev->ethtool_ops->get_rx_csum(real_dev);
|
|
}
|
|
|
|
static const struct ethtool_ops vlan_ethtool_ops = {
|
|
.get_link = ethtool_op_get_link,
|
|
.get_rx_csum = vlan_ethtool_get_rx_csum,
|
|
};
|
|
|
|
void vlan_setup(struct net_device *dev)
|
|
{
|
|
ether_setup(dev);
|
|
|
|
dev->priv_flags |= IFF_802_1Q_VLAN;
|
|
dev->tx_queue_len = 0;
|
|
|
|
dev->change_mtu = vlan_dev_change_mtu;
|
|
dev->init = vlan_dev_init;
|
|
dev->uninit = vlan_dev_uninit;
|
|
dev->open = vlan_dev_open;
|
|
dev->stop = vlan_dev_stop;
|
|
dev->set_mac_address = vlan_dev_set_mac_address;
|
|
dev->set_rx_mode = vlan_dev_set_rx_mode;
|
|
dev->set_multicast_list = vlan_dev_set_rx_mode;
|
|
dev->change_rx_flags = vlan_dev_change_rx_flags;
|
|
dev->do_ioctl = vlan_dev_ioctl;
|
|
dev->destructor = free_netdev;
|
|
dev->ethtool_ops = &vlan_ethtool_ops;
|
|
|
|
memset(dev->broadcast, 0, ETH_ALEN);
|
|
}
|