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1275 |
phoenix |
/* -*- 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: vlan@scry.wanfear.com
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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 <net/datalink.h>
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#include <net/p8022.h>
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#include <net/arp.h>
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#include <linux/brlock.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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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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printk(VLAN_DBG
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"%s: unable to resolve type %X addresses.\n",
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dev->name, (int)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 & 1) {
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if (skb_shared(skb) || skb_cloned(skb)) {
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struct sk_buff *nskb = skb_copy(skb, GFP_ATOMIC);
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kfree_skb(skb);
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skb = nskb;
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}
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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.raw += VLAN_HLEN;
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}
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}
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return skb;
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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 aligned,
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* so there doesn't need to be any of the unaligned stuff. It has
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* 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)
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{
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unsigned char *rawp = NULL;
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struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data);
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unsigned short vid;
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struct net_device_stats *stats;
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unsigned short vlan_TCI;
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unsigned short proto;
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/* vlan_TCI = ntohs(get_unaligned(&vhdr->h_vlan_TCI)); */
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vlan_TCI = ntohs(vhdr->h_vlan_TCI);
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vid = (vlan_TCI & VLAN_VID_MASK);
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#ifdef VLAN_DEBUG
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printk(VLAN_DBG "%s: skb: %p vlan_id: %hx\n",
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__FUNCTION__, skb, vid);
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#endif
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/* Ok, we will find the correct VLAN device, strip the header,
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* and then go on as usual.
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*/
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/* We have 12 bits of vlan ID.
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*
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* We must not drop the vlan_group_lock until we hold a
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* reference to the device (netif_rx does that) or we
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* fail.
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*/
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spin_lock_bh(&vlan_group_lock);
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skb->dev = __find_vlan_dev(dev, vid);
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if (!skb->dev) {
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spin_unlock_bh(&vlan_group_lock);
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#ifdef VLAN_DEBUG
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printk(VLAN_DBG "%s: ERROR: No net_device for VID: %i on dev: %s [%i]\n",
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__FUNCTION__, (unsigned int)(vid), dev->name, dev->ifindex);
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#endif
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kfree_skb(skb);
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return -1;
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}
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skb->dev->last_rx = jiffies;
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/* Bump the rx counters for the VLAN device. */
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stats = vlan_dev_get_stats(skb->dev);
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stats->rx_packets++;
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stats->rx_bytes += skb->len;
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skb_pull(skb, VLAN_HLEN); /* take off the VLAN header (4 bytes currently) */
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/* Ok, lets check to make sure the device (dev) we
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* came in on is what this VLAN is attached to.
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*/
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if (dev != VLAN_DEV_INFO(skb->dev)->real_dev) {
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spin_unlock_bh(&vlan_group_lock);
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#ifdef VLAN_DEBUG
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printk(VLAN_DBG "%s: dropping skb: %p because came in on wrong device, dev: %s real_dev: %s, skb_dev: %s\n",
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__FUNCTION__, skb, dev->name,
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VLAN_DEV_INFO(skb->dev)->real_dev->name,
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skb->dev->name);
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#endif
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kfree_skb(skb);
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stats->rx_errors++;
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return -1;
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}
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| 186 |
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| 187 |
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/*
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* Deal with ingress priority mapping.
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*/
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skb->priority = vlan_get_ingress_priority(skb->dev, ntohs(vhdr->h_vlan_TCI));
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| 192 |
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#ifdef VLAN_DEBUG
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printk(VLAN_DBG "%s: priority: %lu for TCI: %hu (hbo)\n",
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__FUNCTION__, (unsigned long)(skb->priority),
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ntohs(vhdr->h_vlan_TCI));
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#endif
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| 197 |
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| 198 |
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/* The ethernet driver already did the pkt_type calculations
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* for us...
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*/
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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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| 206 |
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case PACKET_MULTICAST:
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stats->multicast++;
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break;
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| 210 |
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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 underlying
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| 213 |
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* device, and still route correctly.
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| 214 |
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*/
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| 215 |
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if (memcmp(skb->mac.ethernet->h_dest, skb->dev->dev_addr, ETH_ALEN) == 0) {
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/* It is for our (changed) MAC-address! */
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skb->pkt_type = PACKET_HOST;
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}
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| 219 |
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break;
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| 220 |
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default:
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| 221 |
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break;
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| 222 |
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};
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| 223 |
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| 224 |
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/* Was a VLAN packet, grab the encapsulated protocol, which the layer
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| 225 |
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* three protocols care about.
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*/
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| 227 |
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/* proto = get_unaligned(&vhdr->h_vlan_encapsulated_proto); */
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| 228 |
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proto = vhdr->h_vlan_encapsulated_proto;
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| 230 |
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skb->protocol = proto;
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| 231 |
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if (ntohs(proto) >= 1536) {
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| 232 |
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/* place it back on the queue to be handled by
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| 233 |
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* true layer 3 protocols.
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| 234 |
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*/
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| 235 |
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| 236 |
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/* See if we are configured to re-write the VLAN header
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| 237 |
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* to make it look like ethernet...
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| 238 |
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*/
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| 239 |
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skb = vlan_check_reorder_header(skb);
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| 240 |
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| 241 |
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/* Can be null if skb-clone fails when re-ordering */
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| 242 |
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if (skb) {
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| 243 |
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netif_rx(skb);
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| 244 |
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} else {
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| 245 |
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/* TODO: Add a more specific counter here. */
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| 246 |
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stats->rx_errors++;
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| 247 |
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}
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| 248 |
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spin_unlock_bh(&vlan_group_lock);
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| 249 |
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return 0;
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| 250 |
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}
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| 251 |
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| 252 |
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rawp = skb->data;
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| 253 |
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| 254 |
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/*
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| 255 |
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* This is a magic hack to spot IPX packets. Older Novell breaks
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| 256 |
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* the protocol design and runs IPX over 802.3 without an 802.2 LLC
|
| 257 |
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* layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
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| 258 |
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* won't work for fault tolerant netware but does for the rest.
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| 259 |
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*/
|
| 260 |
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if (*(unsigned short *)rawp == 0xFFFF) {
|
| 261 |
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skb->protocol = __constant_htons(ETH_P_802_3);
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| 262 |
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/* place it back on the queue to be handled by true layer 3 protocols.
|
| 263 |
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*/
|
| 264 |
|
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|
| 265 |
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/* See if we are configured to re-write the VLAN header
|
| 266 |
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* to make it look like ethernet...
|
| 267 |
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*/
|
| 268 |
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skb = vlan_check_reorder_header(skb);
|
| 269 |
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|
|
| 270 |
|
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/* Can be null if skb-clone fails when re-ordering */
|
| 271 |
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if (skb) {
|
| 272 |
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netif_rx(skb);
|
| 273 |
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} else {
|
| 274 |
|
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/* TODO: Add a more specific counter here. */
|
| 275 |
|
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stats->rx_errors++;
|
| 276 |
|
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}
|
| 277 |
|
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spin_unlock_bh(&vlan_group_lock);
|
| 278 |
|
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return 0;
|
| 279 |
|
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}
|
| 280 |
|
|
|
| 281 |
|
|
/*
|
| 282 |
|
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* Real 802.2 LLC
|
| 283 |
|
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*/
|
| 284 |
|
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skb->protocol = __constant_htons(ETH_P_802_2);
|
| 285 |
|
|
/* place it back on the queue to be handled by upper layer protocols.
|
| 286 |
|
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*/
|
| 287 |
|
|
|
| 288 |
|
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/* See if we are configured to re-write the VLAN header
|
| 289 |
|
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* to make it look like ethernet...
|
| 290 |
|
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*/
|
| 291 |
|
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skb = vlan_check_reorder_header(skb);
|
| 292 |
|
|
|
| 293 |
|
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/* Can be null if skb-clone fails when re-ordering */
|
| 294 |
|
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if (skb) {
|
| 295 |
|
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netif_rx(skb);
|
| 296 |
|
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} else {
|
| 297 |
|
|
/* TODO: Add a more specific counter here. */
|
| 298 |
|
|
stats->rx_errors++;
|
| 299 |
|
|
}
|
| 300 |
|
|
spin_unlock_bh(&vlan_group_lock);
|
| 301 |
|
|
return 0;
|
| 302 |
|
|
}
|
| 303 |
|
|
|
| 304 |
|
|
static inline unsigned short vlan_dev_get_egress_qos_mask(struct net_device* dev,
|
| 305 |
|
|
struct sk_buff* skb)
|
| 306 |
|
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{
|
| 307 |
|
|
struct vlan_priority_tci_mapping *mp =
|
| 308 |
|
|
VLAN_DEV_INFO(dev)->egress_priority_map[(skb->priority & 0xF)];
|
| 309 |
|
|
|
| 310 |
|
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while (mp) {
|
| 311 |
|
|
if (mp->priority == skb->priority) {
|
| 312 |
|
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return mp->vlan_qos; /* This should already be shifted to mask
|
| 313 |
|
|
* correctly with the VLAN's TCI
|
| 314 |
|
|
*/
|
| 315 |
|
|
}
|
| 316 |
|
|
mp = mp->next;
|
| 317 |
|
|
}
|
| 318 |
|
|
return 0;
|
| 319 |
|
|
}
|
| 320 |
|
|
|
| 321 |
|
|
/*
|
| 322 |
|
|
* Create the VLAN header for an arbitrary protocol layer
|
| 323 |
|
|
*
|
| 324 |
|
|
* saddr=NULL means use device source address
|
| 325 |
|
|
* daddr=NULL means leave destination address (eg unresolved arp)
|
| 326 |
|
|
*
|
| 327 |
|
|
* This is called when the SKB is moving down the stack towards the
|
| 328 |
|
|
* physical devices.
|
| 329 |
|
|
*/
|
| 330 |
|
|
int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
|
| 331 |
|
|
unsigned short type, void *daddr, void *saddr,
|
| 332 |
|
|
unsigned len)
|
| 333 |
|
|
{
|
| 334 |
|
|
struct vlan_hdr *vhdr;
|
| 335 |
|
|
unsigned short veth_TCI = 0;
|
| 336 |
|
|
int rc = 0;
|
| 337 |
|
|
int build_vlan_header = 0;
|
| 338 |
|
|
struct net_device *vdev = dev; /* save this for the bottom of the method */
|
| 339 |
|
|
|
| 340 |
|
|
#ifdef VLAN_DEBUG
|
| 341 |
|
|
printk(VLAN_DBG "%s: skb: %p type: %hx len: %x vlan_id: %hx, daddr: %p\n",
|
| 342 |
|
|
__FUNCTION__, skb, type, len, VLAN_DEV_INFO(dev)->vlan_id, daddr);
|
| 343 |
|
|
#endif
|
| 344 |
|
|
|
| 345 |
|
|
/* build vlan header only if re_order_header flag is NOT set. This
|
| 346 |
|
|
* fixes some programs that get confused when they see a VLAN device
|
| 347 |
|
|
* sending a frame that is VLAN encoded (the consensus is that the VLAN
|
| 348 |
|
|
* device should look completely like an Ethernet device when the
|
| 349 |
|
|
* REORDER_HEADER flag is set) The drawback to this is some extra
|
| 350 |
|
|
* header shuffling in the hard_start_xmit. Users can turn off this
|
| 351 |
|
|
* REORDER behaviour with the vconfig tool.
|
| 352 |
|
|
*/
|
| 353 |
|
|
build_vlan_header = ((VLAN_DEV_INFO(dev)->flags & 1) == 0);
|
| 354 |
|
|
|
| 355 |
|
|
if (build_vlan_header) {
|
| 356 |
|
|
vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
|
| 357 |
|
|
|
| 358 |
|
|
/* build the four bytes that make this a VLAN header. */
|
| 359 |
|
|
|
| 360 |
|
|
/* Now, construct the second two bytes. This field looks something
|
| 361 |
|
|
* like:
|
| 362 |
|
|
* usr_priority: 3 bits (high bits)
|
| 363 |
|
|
* CFI 1 bit
|
| 364 |
|
|
* VLAN ID 12 bits (low bits)
|
| 365 |
|
|
*
|
| 366 |
|
|
*/
|
| 367 |
|
|
veth_TCI = VLAN_DEV_INFO(dev)->vlan_id;
|
| 368 |
|
|
veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb);
|
| 369 |
|
|
|
| 370 |
|
|
vhdr->h_vlan_TCI = htons(veth_TCI);
|
| 371 |
|
|
|
| 372 |
|
|
/*
|
| 373 |
|
|
* Set the protocol type.
|
| 374 |
|
|
* For a packet of type ETH_P_802_3 we put the length in here instead.
|
| 375 |
|
|
* It is up to the 802.2 layer to carry protocol information.
|
| 376 |
|
|
*/
|
| 377 |
|
|
|
| 378 |
|
|
if (type != ETH_P_802_3) {
|
| 379 |
|
|
vhdr->h_vlan_encapsulated_proto = htons(type);
|
| 380 |
|
|
} else {
|
| 381 |
|
|
vhdr->h_vlan_encapsulated_proto = htons(len);
|
| 382 |
|
|
}
|
| 383 |
|
|
}
|
| 384 |
|
|
|
| 385 |
|
|
/* Before delegating work to the lower layer, enter our MAC-address */
|
| 386 |
|
|
if (saddr == NULL)
|
| 387 |
|
|
saddr = dev->dev_addr;
|
| 388 |
|
|
|
| 389 |
|
|
dev = VLAN_DEV_INFO(dev)->real_dev;
|
| 390 |
|
|
|
| 391 |
|
|
/* MPLS can send us skbuffs w/out enough space. This check will grow the
|
| 392 |
|
|
* skb if it doesn't have enough headroom. Not a beautiful solution, so
|
| 393 |
|
|
* I'll tick a counter so that users can know it's happening... If they
|
| 394 |
|
|
* care...
|
| 395 |
|
|
*/
|
| 396 |
|
|
|
| 397 |
|
|
/* NOTE: This may still break if the underlying device is not the final
|
| 398 |
|
|
* device (and thus there are more headers to add...) It should work for
|
| 399 |
|
|
* good-ole-ethernet though.
|
| 400 |
|
|
*/
|
| 401 |
|
|
if (skb_headroom(skb) < dev->hard_header_len) {
|
| 402 |
|
|
struct sk_buff *sk_tmp = skb;
|
| 403 |
|
|
skb = skb_realloc_headroom(sk_tmp, dev->hard_header_len);
|
| 404 |
|
|
kfree_skb(sk_tmp);
|
| 405 |
|
|
if (skb == NULL) {
|
| 406 |
|
|
struct net_device_stats *stats = vlan_dev_get_stats(vdev);
|
| 407 |
|
|
stats->tx_dropped++;
|
| 408 |
|
|
return -ENOMEM;
|
| 409 |
|
|
}
|
| 410 |
|
|
VLAN_DEV_INFO(vdev)->cnt_inc_headroom_on_tx++;
|
| 411 |
|
|
#ifdef VLAN_DEBUG
|
| 412 |
|
|
printk(VLAN_DBG "%s: %s: had to grow skb.\n", __FUNCTION__, vdev->name);
|
| 413 |
|
|
#endif
|
| 414 |
|
|
}
|
| 415 |
|
|
|
| 416 |
|
|
if (build_vlan_header) {
|
| 417 |
|
|
/* Now make the underlying real hard header */
|
| 418 |
|
|
rc = dev->hard_header(skb, dev, ETH_P_8021Q, daddr, saddr, len + VLAN_HLEN);
|
| 419 |
|
|
|
| 420 |
|
|
if (rc > 0) {
|
| 421 |
|
|
rc += VLAN_HLEN;
|
| 422 |
|
|
} else if (rc < 0) {
|
| 423 |
|
|
rc -= VLAN_HLEN;
|
| 424 |
|
|
}
|
| 425 |
|
|
} else {
|
| 426 |
|
|
/* If here, then we'll just make a normal looking ethernet frame,
|
| 427 |
|
|
* but, the hard_start_xmit method will insert the tag (it has to
|
| 428 |
|
|
* be able to do this for bridged and other skbs that don't come
|
| 429 |
|
|
* down the protocol stack in an orderly manner.
|
| 430 |
|
|
*/
|
| 431 |
|
|
rc = dev->hard_header(skb, dev, type, daddr, saddr, len);
|
| 432 |
|
|
}
|
| 433 |
|
|
|
| 434 |
|
|
return rc;
|
| 435 |
|
|
}
|
| 436 |
|
|
|
| 437 |
|
|
int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
| 438 |
|
|
{
|
| 439 |
|
|
struct net_device_stats *stats = vlan_dev_get_stats(dev);
|
| 440 |
|
|
struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
|
| 441 |
|
|
|
| 442 |
|
|
/* Handle non-VLAN frames if they are sent to us, for example by DHCP.
|
| 443 |
|
|
*
|
| 444 |
|
|
* NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
|
| 445 |
|
|
* OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
|
| 446 |
|
|
*/
|
| 447 |
|
|
|
| 448 |
|
|
if (veth->h_vlan_proto != __constant_htons(ETH_P_8021Q)) {
|
| 449 |
|
|
int orig_headroom = skb_headroom(skb);
|
| 450 |
|
|
unsigned short veth_TCI;
|
| 451 |
|
|
|
| 452 |
|
|
/* This is not a VLAN frame...but we can fix that! */
|
| 453 |
|
|
VLAN_DEV_INFO(dev)->cnt_encap_on_xmit++;
|
| 454 |
|
|
|
| 455 |
|
|
#ifdef VLAN_DEBUG
|
| 456 |
|
|
printk(VLAN_DBG "%s: proto to encap: 0x%hx (hbo)\n",
|
| 457 |
|
|
__FUNCTION__, htons(veth->h_vlan_proto));
|
| 458 |
|
|
#endif
|
| 459 |
|
|
/* Construct the second two bytes. This field looks something
|
| 460 |
|
|
* like:
|
| 461 |
|
|
* usr_priority: 3 bits (high bits)
|
| 462 |
|
|
* CFI 1 bit
|
| 463 |
|
|
* VLAN ID 12 bits (low bits)
|
| 464 |
|
|
*/
|
| 465 |
|
|
veth_TCI = VLAN_DEV_INFO(dev)->vlan_id;
|
| 466 |
|
|
veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb);
|
| 467 |
|
|
|
| 468 |
|
|
skb = __vlan_put_tag(skb, veth_TCI);
|
| 469 |
|
|
if (!skb) {
|
| 470 |
|
|
stats->tx_dropped++;
|
| 471 |
|
|
return 0;
|
| 472 |
|
|
}
|
| 473 |
|
|
|
| 474 |
|
|
if (orig_headroom < VLAN_HLEN) {
|
| 475 |
|
|
VLAN_DEV_INFO(dev)->cnt_inc_headroom_on_tx++;
|
| 476 |
|
|
}
|
| 477 |
|
|
}
|
| 478 |
|
|
|
| 479 |
|
|
#ifdef VLAN_DEBUG
|
| 480 |
|
|
printk(VLAN_DBG "%s: about to send skb: %p to dev: %s\n",
|
| 481 |
|
|
__FUNCTION__, skb, skb->dev->name);
|
| 482 |
|
|
printk(VLAN_DBG " %2hx.%2hx.%2hx.%2xh.%2hx.%2hx %2hx.%2hx.%2hx.%2hx.%2hx.%2hx %4hx %4hx %4hx\n",
|
| 483 |
|
|
veth->h_dest[0], veth->h_dest[1], veth->h_dest[2], veth->h_dest[3], veth->h_dest[4], veth->h_dest[5],
|
| 484 |
|
|
veth->h_source[0], veth->h_source[1], veth->h_source[2], veth->h_source[3], veth->h_source[4], veth->h_source[5],
|
| 485 |
|
|
veth->h_vlan_proto, veth->h_vlan_TCI, veth->h_vlan_encapsulated_proto);
|
| 486 |
|
|
#endif
|
| 487 |
|
|
|
| 488 |
|
|
stats->tx_packets++; /* for statics only */
|
| 489 |
|
|
stats->tx_bytes += skb->len;
|
| 490 |
|
|
|
| 491 |
|
|
skb->dev = VLAN_DEV_INFO(dev)->real_dev;
|
| 492 |
|
|
dev_queue_xmit(skb);
|
| 493 |
|
|
|
| 494 |
|
|
return 0;
|
| 495 |
|
|
}
|
| 496 |
|
|
|
| 497 |
|
|
int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
| 498 |
|
|
{
|
| 499 |
|
|
struct net_device_stats *stats = vlan_dev_get_stats(dev);
|
| 500 |
|
|
unsigned short veth_TCI;
|
| 501 |
|
|
|
| 502 |
|
|
/* Construct the second two bytes. This field looks something
|
| 503 |
|
|
* like:
|
| 504 |
|
|
* usr_priority: 3 bits (high bits)
|
| 505 |
|
|
* CFI 1 bit
|
| 506 |
|
|
* VLAN ID 12 bits (low bits)
|
| 507 |
|
|
*/
|
| 508 |
|
|
veth_TCI = VLAN_DEV_INFO(dev)->vlan_id;
|
| 509 |
|
|
veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb);
|
| 510 |
|
|
skb = __vlan_hwaccel_put_tag(skb, veth_TCI);
|
| 511 |
|
|
|
| 512 |
|
|
stats->tx_packets++;
|
| 513 |
|
|
stats->tx_bytes += skb->len;
|
| 514 |
|
|
|
| 515 |
|
|
skb->dev = VLAN_DEV_INFO(dev)->real_dev;
|
| 516 |
|
|
dev_queue_xmit(skb);
|
| 517 |
|
|
|
| 518 |
|
|
return 0;
|
| 519 |
|
|
}
|
| 520 |
|
|
|
| 521 |
|
|
int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
|
| 522 |
|
|
{
|
| 523 |
|
|
/* TODO: gotta make sure the underlying layer can handle it,
|
| 524 |
|
|
* maybe an IFF_VLAN_CAPABLE flag for devices?
|
| 525 |
|
|
*/
|
| 526 |
|
|
if (VLAN_DEV_INFO(dev)->real_dev->mtu < new_mtu)
|
| 527 |
|
|
return -ERANGE;
|
| 528 |
|
|
|
| 529 |
|
|
dev->mtu = new_mtu;
|
| 530 |
|
|
|
| 531 |
|
|
return new_mtu;
|
| 532 |
|
|
}
|
| 533 |
|
|
|
| 534 |
|
|
int vlan_dev_set_ingress_priority(char *dev_name, __u32 skb_prio, short vlan_prio)
|
| 535 |
|
|
{
|
| 536 |
|
|
struct net_device *dev = dev_get_by_name(dev_name);
|
| 537 |
|
|
|
| 538 |
|
|
if (dev) {
|
| 539 |
|
|
if (dev->priv_flags & IFF_802_1Q_VLAN) {
|
| 540 |
|
|
/* see if a priority mapping exists.. */
|
| 541 |
|
|
VLAN_DEV_INFO(dev)->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
|
| 542 |
|
|
dev_put(dev);
|
| 543 |
|
|
return 0;
|
| 544 |
|
|
}
|
| 545 |
|
|
|
| 546 |
|
|
dev_put(dev);
|
| 547 |
|
|
}
|
| 548 |
|
|
return -EINVAL;
|
| 549 |
|
|
}
|
| 550 |
|
|
|
| 551 |
|
|
int vlan_dev_set_egress_priority(char *dev_name, __u32 skb_prio, short vlan_prio)
|
| 552 |
|
|
{
|
| 553 |
|
|
struct net_device *dev = dev_get_by_name(dev_name);
|
| 554 |
|
|
struct vlan_priority_tci_mapping *mp = NULL;
|
| 555 |
|
|
struct vlan_priority_tci_mapping *np;
|
| 556 |
|
|
|
| 557 |
|
|
if (dev) {
|
| 558 |
|
|
if (dev->priv_flags & IFF_802_1Q_VLAN) {
|
| 559 |
|
|
/* See if a priority mapping exists.. */
|
| 560 |
|
|
mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF];
|
| 561 |
|
|
while (mp) {
|
| 562 |
|
|
if (mp->priority == skb_prio) {
|
| 563 |
|
|
mp->vlan_qos = ((vlan_prio << 13) & 0xE000);
|
| 564 |
|
|
dev_put(dev);
|
| 565 |
|
|
return 0;
|
| 566 |
|
|
}
|
| 567 |
|
|
mp = mp->next;
|
| 568 |
|
|
}
|
| 569 |
|
|
|
| 570 |
|
|
/* Create a new mapping then. */
|
| 571 |
|
|
mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF];
|
| 572 |
|
|
np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
|
| 573 |
|
|
if (np) {
|
| 574 |
|
|
np->next = mp;
|
| 575 |
|
|
np->priority = skb_prio;
|
| 576 |
|
|
np->vlan_qos = ((vlan_prio << 13) & 0xE000);
|
| 577 |
|
|
VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF] = np;
|
| 578 |
|
|
dev_put(dev);
|
| 579 |
|
|
return 0;
|
| 580 |
|
|
} else {
|
| 581 |
|
|
dev_put(dev);
|
| 582 |
|
|
return -ENOBUFS;
|
| 583 |
|
|
}
|
| 584 |
|
|
}
|
| 585 |
|
|
dev_put(dev);
|
| 586 |
|
|
}
|
| 587 |
|
|
return -EINVAL;
|
| 588 |
|
|
}
|
| 589 |
|
|
|
| 590 |
|
|
/* Flags are defined in the vlan_dev_info class in include/linux/if_vlan.h file. */
|
| 591 |
|
|
int vlan_dev_set_vlan_flag(char *dev_name, __u32 flag, short flag_val)
|
| 592 |
|
|
{
|
| 593 |
|
|
struct net_device *dev = dev_get_by_name(dev_name);
|
| 594 |
|
|
|
| 595 |
|
|
if (dev) {
|
| 596 |
|
|
if (dev->priv_flags & IFF_802_1Q_VLAN) {
|
| 597 |
|
|
/* verify flag is supported */
|
| 598 |
|
|
if (flag == 1) {
|
| 599 |
|
|
if (flag_val) {
|
| 600 |
|
|
VLAN_DEV_INFO(dev)->flags |= 1;
|
| 601 |
|
|
} else {
|
| 602 |
|
|
VLAN_DEV_INFO(dev)->flags &= ~1;
|
| 603 |
|
|
}
|
| 604 |
|
|
dev_put(dev);
|
| 605 |
|
|
return 0;
|
| 606 |
|
|
} else {
|
| 607 |
|
|
printk(KERN_ERR "%s: flag %i is not valid.\n",
|
| 608 |
|
|
__FUNCTION__, (int)(flag));
|
| 609 |
|
|
dev_put(dev);
|
| 610 |
|
|
return -EINVAL;
|
| 611 |
|
|
}
|
| 612 |
|
|
} else {
|
| 613 |
|
|
printk(KERN_ERR
|
| 614 |
|
|
"%s: %s is not a vlan device, priv_flags: %hX.\n",
|
| 615 |
|
|
__FUNCTION__, dev->name, dev->priv_flags);
|
| 616 |
|
|
dev_put(dev);
|
| 617 |
|
|
}
|
| 618 |
|
|
} else {
|
| 619 |
|
|
printk(KERN_ERR "%s: Could not find device: %s\n",
|
| 620 |
|
|
__FUNCTION__, dev_name);
|
| 621 |
|
|
}
|
| 622 |
|
|
|
| 623 |
|
|
return -EINVAL;
|
| 624 |
|
|
}
|
| 625 |
|
|
|
| 626 |
|
|
|
| 627 |
|
|
int vlan_dev_get_realdev_name(const char *dev_name, char* result)
|
| 628 |
|
|
{
|
| 629 |
|
|
struct net_device *dev = dev_get_by_name(dev_name);
|
| 630 |
|
|
int rv = 0;
|
| 631 |
|
|
|
| 632 |
|
|
if (dev) {
|
| 633 |
|
|
if (dev->priv_flags & IFF_802_1Q_VLAN) {
|
| 634 |
|
|
strncpy(result, VLAN_DEV_INFO(dev)->real_dev->name, 23);
|
| 635 |
|
|
dev_put(dev);
|
| 636 |
|
|
rv = 0;
|
| 637 |
|
|
} else {
|
| 638 |
|
|
/*printk(KERN_ERR
|
| 639 |
|
|
"%s: %s is not a vlan device, priv_flags: %hX.\n",
|
| 640 |
|
|
__FUNCTION__, dev->name, dev->priv_flags);*/
|
| 641 |
|
|
dev_put(dev);
|
| 642 |
|
|
rv = -EINVAL;
|
| 643 |
|
|
}
|
| 644 |
|
|
} else {
|
| 645 |
|
|
/* printk(KERN_ERR "%s: Could not find device: %s\n",
|
| 646 |
|
|
__FUNCTION__, dev_name); */
|
| 647 |
|
|
rv = -ENODEV;
|
| 648 |
|
|
}
|
| 649 |
|
|
|
| 650 |
|
|
return rv;
|
| 651 |
|
|
}
|
| 652 |
|
|
|
| 653 |
|
|
int vlan_dev_get_vid(const char *dev_name, unsigned short* result)
|
| 654 |
|
|
{
|
| 655 |
|
|
struct net_device *dev = dev_get_by_name(dev_name);
|
| 656 |
|
|
int rv = 0;
|
| 657 |
|
|
|
| 658 |
|
|
if (dev) {
|
| 659 |
|
|
if (dev->priv_flags & IFF_802_1Q_VLAN) {
|
| 660 |
|
|
*result = VLAN_DEV_INFO(dev)->vlan_id;
|
| 661 |
|
|
dev_put(dev);
|
| 662 |
|
|
rv = 0;
|
| 663 |
|
|
} else {
|
| 664 |
|
|
/*printk(KERN_ERR
|
| 665 |
|
|
"%s: %s is not a vlan device, priv_flags: %hX.\n",
|
| 666 |
|
|
__FUNCTION__, dev->name, dev->priv_flags);*/
|
| 667 |
|
|
dev_put(dev);
|
| 668 |
|
|
rv = -EINVAL;
|
| 669 |
|
|
}
|
| 670 |
|
|
} else {
|
| 671 |
|
|
/* printk(KERN_ERR "%s: Could not find device: %s\n",
|
| 672 |
|
|
__FUNCTION__, dev_name);*/
|
| 673 |
|
|
rv = -ENODEV;
|
| 674 |
|
|
}
|
| 675 |
|
|
|
| 676 |
|
|
return rv;
|
| 677 |
|
|
}
|
| 678 |
|
|
|
| 679 |
|
|
|
| 680 |
|
|
int vlan_dev_set_mac_address(struct net_device *dev, void *addr_struct_p)
|
| 681 |
|
|
{
|
| 682 |
|
|
struct sockaddr *addr = (struct sockaddr *)(addr_struct_p);
|
| 683 |
|
|
int i;
|
| 684 |
|
|
|
| 685 |
|
|
if (netif_running(dev))
|
| 686 |
|
|
return -EBUSY;
|
| 687 |
|
|
|
| 688 |
|
|
memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
|
| 689 |
|
|
|
| 690 |
|
|
printk("%s: Setting MAC address to ", dev->name);
|
| 691 |
|
|
for (i = 0; i < 6; i++)
|
| 692 |
|
|
printk(" %2.2x", dev->dev_addr[i]);
|
| 693 |
|
|
printk(".\n");
|
| 694 |
|
|
|
| 695 |
|
|
if (memcmp(VLAN_DEV_INFO(dev)->real_dev->dev_addr,
|
| 696 |
|
|
dev->dev_addr,
|
| 697 |
|
|
dev->addr_len) != 0) {
|
| 698 |
|
|
if (!(VLAN_DEV_INFO(dev)->real_dev->flags & IFF_PROMISC)) {
|
| 699 |
|
|
int flgs = VLAN_DEV_INFO(dev)->real_dev->flags;
|
| 700 |
|
|
|
| 701 |
|
|
/* Increment our in-use promiscuity counter */
|
| 702 |
|
|
dev_set_promiscuity(VLAN_DEV_INFO(dev)->real_dev, 1);
|
| 703 |
|
|
|
| 704 |
|
|
/* Make PROMISC visible to the user. */
|
| 705 |
|
|
flgs |= IFF_PROMISC;
|
| 706 |
|
|
printk("VLAN (%s): Setting underlying device (%s) to promiscious mode.\n",
|
| 707 |
|
|
dev->name, VLAN_DEV_INFO(dev)->real_dev->name);
|
| 708 |
|
|
dev_change_flags(VLAN_DEV_INFO(dev)->real_dev, flgs);
|
| 709 |
|
|
}
|
| 710 |
|
|
} else {
|
| 711 |
|
|
printk("VLAN (%s): Underlying device (%s) has same MAC, not checking promiscious mode.\n",
|
| 712 |
|
|
dev->name, VLAN_DEV_INFO(dev)->real_dev->name);
|
| 713 |
|
|
}
|
| 714 |
|
|
|
| 715 |
|
|
return 0;
|
| 716 |
|
|
}
|
| 717 |
|
|
|
| 718 |
|
|
static inline int vlan_dmi_equals(struct dev_mc_list *dmi1,
|
| 719 |
|
|
struct dev_mc_list *dmi2)
|
| 720 |
|
|
{
|
| 721 |
|
|
return ((dmi1->dmi_addrlen == dmi2->dmi_addrlen) &&
|
| 722 |
|
|
(memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0));
|
| 723 |
|
|
}
|
| 724 |
|
|
|
| 725 |
|
|
/** dmi is a single entry into a dev_mc_list, a single node. mc_list is
|
| 726 |
|
|
* an entire list, and we'll iterate through it.
|
| 727 |
|
|
*/
|
| 728 |
|
|
static int vlan_should_add_mc(struct dev_mc_list *dmi, struct dev_mc_list *mc_list)
|
| 729 |
|
|
{
|
| 730 |
|
|
struct dev_mc_list *idmi;
|
| 731 |
|
|
|
| 732 |
|
|
for (idmi = mc_list; idmi != NULL; ) {
|
| 733 |
|
|
if (vlan_dmi_equals(dmi, idmi)) {
|
| 734 |
|
|
if (dmi->dmi_users > idmi->dmi_users)
|
| 735 |
|
|
return 1;
|
| 736 |
|
|
else
|
| 737 |
|
|
return 0;
|
| 738 |
|
|
} else {
|
| 739 |
|
|
idmi = idmi->next;
|
| 740 |
|
|
}
|
| 741 |
|
|
}
|
| 742 |
|
|
|
| 743 |
|
|
return 1;
|
| 744 |
|
|
}
|
| 745 |
|
|
|
| 746 |
|
|
static inline void vlan_destroy_mc_list(struct dev_mc_list *mc_list)
|
| 747 |
|
|
{
|
| 748 |
|
|
struct dev_mc_list *dmi = mc_list;
|
| 749 |
|
|
struct dev_mc_list *next;
|
| 750 |
|
|
|
| 751 |
|
|
while(dmi) {
|
| 752 |
|
|
next = dmi->next;
|
| 753 |
|
|
kfree(dmi);
|
| 754 |
|
|
dmi = next;
|
| 755 |
|
|
}
|
| 756 |
|
|
}
|
| 757 |
|
|
|
| 758 |
|
|
static void vlan_copy_mc_list(struct dev_mc_list *mc_list, struct vlan_dev_info *vlan_info)
|
| 759 |
|
|
{
|
| 760 |
|
|
struct dev_mc_list *dmi, *new_dmi;
|
| 761 |
|
|
|
| 762 |
|
|
vlan_destroy_mc_list(vlan_info->old_mc_list);
|
| 763 |
|
|
vlan_info->old_mc_list = NULL;
|
| 764 |
|
|
|
| 765 |
|
|
for (dmi = mc_list; dmi != NULL; dmi = dmi->next) {
|
| 766 |
|
|
new_dmi = kmalloc(sizeof(*new_dmi), GFP_ATOMIC);
|
| 767 |
|
|
if (new_dmi == NULL) {
|
| 768 |
|
|
printk(KERN_ERR "vlan: cannot allocate memory. "
|
| 769 |
|
|
"Multicast may not work properly from now.\n");
|
| 770 |
|
|
return;
|
| 771 |
|
|
}
|
| 772 |
|
|
|
| 773 |
|
|
/* Copy whole structure, then make new 'next' pointer */
|
| 774 |
|
|
*new_dmi = *dmi;
|
| 775 |
|
|
new_dmi->next = vlan_info->old_mc_list;
|
| 776 |
|
|
vlan_info->old_mc_list = new_dmi;
|
| 777 |
|
|
}
|
| 778 |
|
|
}
|
| 779 |
|
|
|
| 780 |
|
|
static void vlan_flush_mc_list(struct net_device *dev)
|
| 781 |
|
|
{
|
| 782 |
|
|
struct dev_mc_list *dmi = dev->mc_list;
|
| 783 |
|
|
|
| 784 |
|
|
while (dmi) {
|
| 785 |
|
|
dev_mc_delete(dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
|
| 786 |
|
|
printk(KERN_DEBUG "%s: del %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address from vlan interface\n",
|
| 787 |
|
|
dev->name,
|
| 788 |
|
|
dmi->dmi_addr[0],
|
| 789 |
|
|
dmi->dmi_addr[1],
|
| 790 |
|
|
dmi->dmi_addr[2],
|
| 791 |
|
|
dmi->dmi_addr[3],
|
| 792 |
|
|
dmi->dmi_addr[4],
|
| 793 |
|
|
dmi->dmi_addr[5]);
|
| 794 |
|
|
dmi = dev->mc_list;
|
| 795 |
|
|
}
|
| 796 |
|
|
|
| 797 |
|
|
/* dev->mc_list is NULL by the time we get here. */
|
| 798 |
|
|
vlan_destroy_mc_list(VLAN_DEV_INFO(dev)->old_mc_list);
|
| 799 |
|
|
VLAN_DEV_INFO(dev)->old_mc_list = NULL;
|
| 800 |
|
|
}
|
| 801 |
|
|
|
| 802 |
|
|
int vlan_dev_open(struct net_device *dev)
|
| 803 |
|
|
{
|
| 804 |
|
|
if (!(VLAN_DEV_INFO(dev)->real_dev->flags & IFF_UP))
|
| 805 |
|
|
return -ENETDOWN;
|
| 806 |
|
|
|
| 807 |
|
|
return 0;
|
| 808 |
|
|
}
|
| 809 |
|
|
|
| 810 |
|
|
int vlan_dev_stop(struct net_device *dev)
|
| 811 |
|
|
{
|
| 812 |
|
|
vlan_flush_mc_list(dev);
|
| 813 |
|
|
return 0;
|
| 814 |
|
|
}
|
| 815 |
|
|
|
| 816 |
|
|
int vlan_dev_init(struct net_device *dev)
|
| 817 |
|
|
{
|
| 818 |
|
|
/* TODO: figure this out, maybe do nothing?? */
|
| 819 |
|
|
return 0;
|
| 820 |
|
|
}
|
| 821 |
|
|
|
| 822 |
|
|
void vlan_dev_destruct(struct net_device *dev)
|
| 823 |
|
|
{
|
| 824 |
|
|
if (dev) {
|
| 825 |
|
|
vlan_flush_mc_list(dev);
|
| 826 |
|
|
if (dev->priv) {
|
| 827 |
|
|
if (VLAN_DEV_INFO(dev)->dent)
|
| 828 |
|
|
BUG();
|
| 829 |
|
|
|
| 830 |
|
|
kfree(dev->priv);
|
| 831 |
|
|
dev->priv = NULL;
|
| 832 |
|
|
}
|
| 833 |
|
|
}
|
| 834 |
|
|
}
|
| 835 |
|
|
|
| 836 |
|
|
/** Taken from Gleb + Lennert's VLAN code, and modified... */
|
| 837 |
|
|
void vlan_dev_set_multicast_list(struct net_device *vlan_dev)
|
| 838 |
|
|
{
|
| 839 |
|
|
struct dev_mc_list *dmi;
|
| 840 |
|
|
struct net_device *real_dev;
|
| 841 |
|
|
int inc;
|
| 842 |
|
|
|
| 843 |
|
|
if (vlan_dev && (vlan_dev->priv_flags & IFF_802_1Q_VLAN)) {
|
| 844 |
|
|
/* Then it's a real vlan device, as far as we can tell.. */
|
| 845 |
|
|
real_dev = VLAN_DEV_INFO(vlan_dev)->real_dev;
|
| 846 |
|
|
|
| 847 |
|
|
/* compare the current promiscuity to the last promisc we had.. */
|
| 848 |
|
|
inc = vlan_dev->promiscuity - VLAN_DEV_INFO(vlan_dev)->old_promiscuity;
|
| 849 |
|
|
if (inc) {
|
| 850 |
|
|
printk(KERN_INFO "%s: dev_set_promiscuity(master, %d)\n",
|
| 851 |
|
|
vlan_dev->name, inc);
|
| 852 |
|
|
dev_set_promiscuity(real_dev, inc); /* found in dev.c */
|
| 853 |
|
|
VLAN_DEV_INFO(vlan_dev)->old_promiscuity = vlan_dev->promiscuity;
|
| 854 |
|
|
}
|
| 855 |
|
|
|
| 856 |
|
|
inc = vlan_dev->allmulti - VLAN_DEV_INFO(vlan_dev)->old_allmulti;
|
| 857 |
|
|
if (inc) {
|
| 858 |
|
|
printk(KERN_INFO "%s: dev_set_allmulti(master, %d)\n",
|
| 859 |
|
|
vlan_dev->name, inc);
|
| 860 |
|
|
dev_set_allmulti(real_dev, inc); /* dev.c */
|
| 861 |
|
|
VLAN_DEV_INFO(vlan_dev)->old_allmulti = vlan_dev->allmulti;
|
| 862 |
|
|
}
|
| 863 |
|
|
|
| 864 |
|
|
/* looking for addresses to add to master's list */
|
| 865 |
|
|
for (dmi = vlan_dev->mc_list; dmi != NULL; dmi = dmi->next) {
|
| 866 |
|
|
if (vlan_should_add_mc(dmi, VLAN_DEV_INFO(vlan_dev)->old_mc_list)) {
|
| 867 |
|
|
dev_mc_add(real_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
|
| 868 |
|
|
printk(KERN_DEBUG "%s: add %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address to master interface\n",
|
| 869 |
|
|
vlan_dev->name,
|
| 870 |
|
|
dmi->dmi_addr[0],
|
| 871 |
|
|
dmi->dmi_addr[1],
|
| 872 |
|
|
dmi->dmi_addr[2],
|
| 873 |
|
|
dmi->dmi_addr[3],
|
| 874 |
|
|
dmi->dmi_addr[4],
|
| 875 |
|
|
dmi->dmi_addr[5]);
|
| 876 |
|
|
}
|
| 877 |
|
|
}
|
| 878 |
|
|
|
| 879 |
|
|
/* looking for addresses to delete from master's list */
|
| 880 |
|
|
for (dmi = VLAN_DEV_INFO(vlan_dev)->old_mc_list; dmi != NULL; dmi = dmi->next) {
|
| 881 |
|
|
if (vlan_should_add_mc(dmi, vlan_dev->mc_list)) {
|
| 882 |
|
|
/* if we think we should add it to the new list, then we should really
|
| 883 |
|
|
* delete it from the real list on the underlying device.
|
| 884 |
|
|
*/
|
| 885 |
|
|
dev_mc_delete(real_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
|
| 886 |
|
|
printk(KERN_DEBUG "%s: del %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address from master interface\n",
|
| 887 |
|
|
vlan_dev->name,
|
| 888 |
|
|
dmi->dmi_addr[0],
|
| 889 |
|
|
dmi->dmi_addr[1],
|
| 890 |
|
|
dmi->dmi_addr[2],
|
| 891 |
|
|
dmi->dmi_addr[3],
|
| 892 |
|
|
dmi->dmi_addr[4],
|
| 893 |
|
|
dmi->dmi_addr[5]);
|
| 894 |
|
|
}
|
| 895 |
|
|
}
|
| 896 |
|
|
|
| 897 |
|
|
/* save multicast list */
|
| 898 |
|
|
vlan_copy_mc_list(vlan_dev->mc_list, VLAN_DEV_INFO(vlan_dev));
|
| 899 |
|
|
}
|
| 900 |
|
|
}
|
