* Ethernet-type device handling.
*
* Authors: Ben Greear <greearb@candelatech.com>
- * Please send support related email to: vlan@scry.wanfear.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
*
* TODO: This needs a checkup, I'm ignorant here. --BLG
*/
-int vlan_dev_rebuild_header(struct sk_buff *skb)
+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);
/* TODO: Confirm this will work with VLAN headers... */
return arp_find(veth->h_dest, skb);
-#endif
+#endif
default:
- printk(VLAN_DBG
- "%s: unable to resolve type %X addresses.\n",
- dev->name, (int)veth->h_vlan_encapsulated_proto);
-
+ pr_debug("%s: unable to resolve type %X addresses.\n",
+ dev->name, ntohs(veth->h_vlan_encapsulated_proto));
+
memcpy(veth->h_source, dev->dev_addr, ETH_ALEN);
break;
- };
+ }
return 0;
}
static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb)
{
- if (VLAN_DEV_INFO(skb->dev)->flags & 1) {
+ if (vlan_dev_info(skb->dev)->flags & VLAN_FLAG_REORDER_HDR) {
if (skb_shared(skb) || skb_cloned(skb)) {
struct sk_buff *nskb = skb_copy(skb, GFP_ATOMIC);
kfree_skb(skb);
/* Lifted from Gleb's VLAN code... */
memmove(skb->data - ETH_HLEN,
skb->data - VLAN_ETH_HLEN, 12);
- skb->mac.raw += VLAN_HLEN;
+ skb->mac_header += VLAN_HLEN;
}
}
return skb;
}
+static inline void vlan_set_encap_proto(struct sk_buff *skb,
+ struct vlan_hdr *vhdr)
+{
+ __be16 proto;
+ unsigned char *rawp;
+
+ /*
+ * Was a VLAN packet, grab the encapsulated protocol, which the layer
+ * three protocols care about.
+ */
+
+ proto = vhdr->h_vlan_encapsulated_proto;
+ if (ntohs(proto) >= 1536) {
+ skb->protocol = proto;
+ return;
+ }
+
+ rawp = skb->data;
+ if (*(unsigned short *)rawp == 0xFFFF)
+ /*
+ * This is a magic hack to spot IPX packets. Older Novell
+ * breaks the protocol design and runs IPX over 802.3 without
+ * an 802.2 LLC layer. We look for FFFF which isn't a used
+ * 802.2 SSAP/DSAP. This won't work for fault tolerant netware
+ * but does for the rest.
+ */
+ skb->protocol = htons(ETH_P_802_3);
+ else
+ /*
+ * Real 802.2 LLC
+ */
+ skb->protocol = htons(ETH_P_802_2);
+}
+
/*
- * Determine the packet's protocol ID. The rule here is that we
+ * Determine the packet's protocol ID. The rule here is that we
* assume 802.3 if the type field is short enough to be a length.
* This is normal practice and works for any 'now in use' protocol.
*
* SANITY NOTE 2: We are referencing to the VLAN_HDR frields, which MAY be
* stored UNALIGNED in the memory. RISC systems don't like
* such cases very much...
- * SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be aligned,
- * so there doesn't need to be any of the unaligned stuff. It has
- * been commented out now... --Ben
+ * SANITY NOTE 2a: According to Dave Miller & Alexey, it will always be
+ * aligned, so there doesn't need to be any of the unaligned
+ * stuff. It has been commented out now... --Ben
*
*/
int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type* ptype, struct net_device *orig_dev)
+ struct packet_type *ptype, struct net_device *orig_dev)
{
- unsigned char *rawp = NULL;
- struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data);
+ struct vlan_hdr *vhdr;
unsigned short vid;
struct net_device_stats *stats;
unsigned short vlan_TCI;
- __be16 proto;
- /* vlan_TCI = ntohs(get_unaligned(&vhdr->h_vlan_TCI)); */
- vlan_TCI = ntohs(vhdr->h_vlan_TCI);
+ if (dev_net(dev) != &init_net)
+ goto err_free;
- vid = (vlan_TCI & VLAN_VID_MASK);
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (skb == NULL)
+ goto err_free;
-#ifdef VLAN_DEBUG
- printk(VLAN_DBG "%s: skb: %p vlan_id: %hx\n",
- __FUNCTION__, skb, vid);
-#endif
+ if (unlikely(!pskb_may_pull(skb, VLAN_HLEN)))
+ goto err_free;
- /* Ok, we will find the correct VLAN device, strip the header,
- * and then go on as usual.
- */
-
- /* We have 12 bits of vlan ID.
- *
- * We must not drop allow preempt until we hold a
- * reference to the device (netif_rx does that) or we
- * fail.
- */
+ vhdr = (struct vlan_hdr *)skb->data;
+ vlan_TCI = ntohs(vhdr->h_vlan_TCI);
+ vid = (vlan_TCI & VLAN_VID_MASK);
rcu_read_lock();
skb->dev = __find_vlan_dev(dev, vid);
if (!skb->dev) {
- rcu_read_unlock();
-
-#ifdef VLAN_DEBUG
- printk(VLAN_DBG "%s: ERROR: No net_device for VID: %i on dev: %s [%i]\n",
- __FUNCTION__, (unsigned int)(vid), dev->name, dev->ifindex);
-#endif
- kfree_skb(skb);
- return -1;
+ pr_debug("%s: ERROR: No net_device for VID: %u on dev: %s\n",
+ __func__, (unsigned int)vid, dev->name);
+ goto err_unlock;
}
skb->dev->last_rx = jiffies;
- /* Bump the rx counters for the VLAN device. */
- stats = vlan_dev_get_stats(skb->dev);
+ stats = &skb->dev->stats;
stats->rx_packets++;
stats->rx_bytes += skb->len;
- skb_pull(skb, VLAN_HLEN); /* take off the VLAN header (4 bytes currently) */
-
- /* Need to correct hardware checksum */
- skb_postpull_rcsum(skb, vhdr, VLAN_HLEN);
+ skb_pull_rcsum(skb, VLAN_HLEN);
- /* Ok, lets check to make sure the device (dev) we
- * came in on is what this VLAN is attached to.
- */
-
- if (dev != VLAN_DEV_INFO(skb->dev)->real_dev) {
- rcu_read_unlock();
+ skb->priority = vlan_get_ingress_priority(skb->dev,
+ ntohs(vhdr->h_vlan_TCI));
-#ifdef VLAN_DEBUG
- printk(VLAN_DBG "%s: dropping skb: %p because came in on wrong device, dev: %s real_dev: %s, skb_dev: %s\n",
- __FUNCTION__, skb, dev->name,
- VLAN_DEV_INFO(skb->dev)->real_dev->name,
- skb->dev->name);
-#endif
- kfree_skb(skb);
- stats->rx_errors++;
- return -1;
- }
-
- /*
- * Deal with ingress priority mapping.
- */
- skb->priority = vlan_get_ingress_priority(skb->dev, ntohs(vhdr->h_vlan_TCI));
+ pr_debug("%s: priority: %u for TCI: %hu\n",
+ __func__, skb->priority, ntohs(vhdr->h_vlan_TCI));
-#ifdef VLAN_DEBUG
- printk(VLAN_DBG "%s: priority: %lu for TCI: %hu (hbo)\n",
- __FUNCTION__, (unsigned long)(skb->priority),
- ntohs(vhdr->h_vlan_TCI));
-#endif
-
- /* The ethernet driver already did the pkt_type calculations
- * for us...
- */
switch (skb->pkt_type) {
case PACKET_BROADCAST: /* Yeah, stats collect these together.. */
- // stats->broadcast ++; // no such counter :-(
+ /* stats->broadcast ++; // no such counter :-( */
break;
case PACKET_MULTICAST:
stats->multicast++;
break;
- case PACKET_OTHERHOST:
+ case PACKET_OTHERHOST:
/* Our lower layer thinks this is not local, let's make sure.
- * This allows the VLAN to have a different MAC than the underlying
- * device, and still route correctly.
+ * This allows the VLAN to have a different MAC than the
+ * underlying device, and still route correctly.
*/
- if (memcmp(eth_hdr(skb)->h_dest, skb->dev->dev_addr, ETH_ALEN) == 0) {
- /* It is for our (changed) MAC-address! */
+ if (!compare_ether_addr(eth_hdr(skb)->h_dest,
+ skb->dev->dev_addr))
skb->pkt_type = PACKET_HOST;
- }
break;
default:
break;
- };
-
- /* Was a VLAN packet, grab the encapsulated protocol, which the layer
- * three protocols care about.
- */
- /* proto = get_unaligned(&vhdr->h_vlan_encapsulated_proto); */
- proto = vhdr->h_vlan_encapsulated_proto;
-
- skb->protocol = proto;
- if (ntohs(proto) >= 1536) {
- /* place it back on the queue to be handled by
- * true layer 3 protocols.
- */
-
- /* See if we are configured to re-write the VLAN header
- * to make it look like ethernet...
- */
- skb = vlan_check_reorder_header(skb);
-
- /* Can be null if skb-clone fails when re-ordering */
- if (skb) {
- netif_rx(skb);
- } else {
- /* TODO: Add a more specific counter here. */
- stats->rx_errors++;
- }
- rcu_read_unlock();
- return 0;
- }
-
- rawp = skb->data;
-
- /*
- * This is a magic hack to spot IPX packets. Older Novell breaks
- * the protocol design and runs IPX over 802.3 without an 802.2 LLC
- * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
- * won't work for fault tolerant netware but does for the rest.
- */
- if (*(unsigned short *)rawp == 0xFFFF) {
- skb->protocol = __constant_htons(ETH_P_802_3);
- /* place it back on the queue to be handled by true layer 3 protocols.
- */
-
- /* See if we are configured to re-write the VLAN header
- * to make it look like ethernet...
- */
- skb = vlan_check_reorder_header(skb);
-
- /* Can be null if skb-clone fails when re-ordering */
- if (skb) {
- netif_rx(skb);
- } else {
- /* TODO: Add a more specific counter here. */
- stats->rx_errors++;
- }
- rcu_read_unlock();
- return 0;
}
- /*
- * Real 802.2 LLC
- */
- skb->protocol = __constant_htons(ETH_P_802_2);
- /* place it back on the queue to be handled by upper layer protocols.
- */
+ vlan_set_encap_proto(skb, vhdr);
- /* See if we are configured to re-write the VLAN header
- * to make it look like ethernet...
- */
skb = vlan_check_reorder_header(skb);
-
- /* Can be null if skb-clone fails when re-ordering */
- if (skb) {
- netif_rx(skb);
- } else {
- /* TODO: Add a more specific counter here. */
+ if (!skb) {
stats->rx_errors++;
+ goto err_unlock;
}
+
+ netif_rx(skb);
rcu_read_unlock();
- return 0;
+ return NET_RX_SUCCESS;
+
+err_unlock:
+ rcu_read_unlock();
+err_free:
+ kfree_skb(skb);
+ return NET_RX_DROP;
}
-static inline unsigned short vlan_dev_get_egress_qos_mask(struct net_device* dev,
- struct sk_buff* skb)
+static inline unsigned short
+vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb)
{
- struct vlan_priority_tci_mapping *mp =
- VLAN_DEV_INFO(dev)->egress_priority_map[(skb->priority & 0xF)];
+ 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
- */
+ return mp->vlan_qos; /* This should already be shifted
+ * to mask correctly with the
+ * VLAN's TCI */
}
mp = mp->next;
}
}
/*
- * Create the VLAN header for an arbitrary protocol layer
+ * 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.
*/
-int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
- unsigned short type, void *daddr, void *saddr,
- unsigned len)
+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 short veth_TCI = 0;
int rc = 0;
int build_vlan_header = 0;
- struct net_device *vdev = dev; /* save this for the bottom of the method */
+ struct net_device *vdev = dev;
-#ifdef VLAN_DEBUG
- printk(VLAN_DBG "%s: skb: %p type: %hx len: %x vlan_id: %hx, daddr: %p\n",
- __FUNCTION__, skb, type, len, VLAN_DEV_INFO(dev)->vlan_id, daddr);
-#endif
+ pr_debug("%s: skb: %p type: %hx len: %u vlan_id: %hx, daddr: %p\n",
+ __func__, skb, type, len, vlan_dev_info(dev)->vlan_id,
+ daddr);
/* build vlan header only if re_order_header flag is NOT set. This
* fixes some programs that get confused when they see a VLAN device
* sending a frame that is VLAN encoded (the consensus is that the VLAN
* device should look completely like an Ethernet device when the
- * REORDER_HEADER flag is set) The drawback to this is some extra
+ * REORDER_HEADER flag is set) The drawback to this is some extra
* header shuffling in the hard_start_xmit. Users can turn off this
* REORDER behaviour with the vconfig tool.
*/
- build_vlan_header = ((VLAN_DEV_INFO(dev)->flags & 1) == 0);
+ if (!(vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR))
+ build_vlan_header = 1;
if (build_vlan_header) {
vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);
/* build the four bytes that make this a VLAN header. */
- /* Now, construct the second two bytes. This field looks something
- * like:
+ /* Now, construct the second two bytes. This field looks
+ * something like:
* usr_priority: 3 bits (high bits)
* CFI 1 bit
* VLAN ID 12 bits (low bits)
*
*/
- veth_TCI = VLAN_DEV_INFO(dev)->vlan_id;
+ veth_TCI = vlan_dev_info(dev)->vlan_id;
veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb);
vhdr->h_vlan_TCI = htons(veth_TCI);
/*
- * Set the protocol type.
- * For a packet of type ETH_P_802_3 we put the length in here instead.
- * It is up to the 802.2 layer to carry protocol information.
+ * Set the protocol type. For a packet of type ETH_P_802_3 we
+ * put the length in here instead. It is up to the 802.2
+ * layer to carry protocol information.
*/
- if (type != ETH_P_802_3) {
+ if (type != ETH_P_802_3)
vhdr->h_vlan_encapsulated_proto = htons(type);
- } else {
+ else
vhdr->h_vlan_encapsulated_proto = htons(len);
- }
+
+ skb->protocol = htons(ETH_P_8021Q);
+ skb_reset_network_header(skb);
}
/* Before delegating work to the lower layer, enter our MAC-address */
if (saddr == NULL)
saddr = dev->dev_addr;
- dev = VLAN_DEV_INFO(dev)->real_dev;
+ dev = vlan_dev_info(dev)->real_dev;
- /* MPLS can send us skbuffs w/out enough space. This check will grow the
- * skb if it doesn't have enough headroom. Not a beautiful solution, so
- * I'll tick a counter so that users can know it's happening... If they
- * care...
+ /* MPLS can send us skbuffs w/out enough space. This check will grow
+ * the skb if it doesn't have enough headroom. Not a beautiful solution,
+ * so I'll tick a counter so that users can know it's happening...
+ * If they care...
*/
- /* NOTE: This may still break if the underlying device is not the final
- * device (and thus there are more headers to add...) It should work for
+ /* NOTE: This may still break if the underlying device is not the final
+ * device (and thus there are more headers to add...) It should work for
* good-ole-ethernet though.
*/
if (skb_headroom(skb) < dev->hard_header_len) {
skb = skb_realloc_headroom(sk_tmp, dev->hard_header_len);
kfree_skb(sk_tmp);
if (skb == NULL) {
- struct net_device_stats *stats = vlan_dev_get_stats(vdev);
+ struct net_device_stats *stats = &vdev->stats;
stats->tx_dropped++;
return -ENOMEM;
}
- VLAN_DEV_INFO(vdev)->cnt_inc_headroom_on_tx++;
-#ifdef VLAN_DEBUG
- printk(VLAN_DBG "%s: %s: had to grow skb.\n", __FUNCTION__, vdev->name);
-#endif
+ vlan_dev_info(vdev)->cnt_inc_headroom_on_tx++;
+ pr_debug("%s: %s: had to grow skb\n", __func__, vdev->name);
}
if (build_vlan_header) {
/* Now make the underlying real hard header */
- rc = dev->hard_header(skb, dev, ETH_P_8021Q, daddr, saddr, len + VLAN_HLEN);
-
- if (rc > 0) {
+ rc = dev_hard_header(skb, dev, ETH_P_8021Q, daddr, saddr,
+ len + VLAN_HLEN);
+ if (rc > 0)
rc += VLAN_HLEN;
- } else if (rc < 0) {
+ else if (rc < 0)
rc -= VLAN_HLEN;
- }
- } else {
- /* If here, then we'll just make a normal looking ethernet frame,
- * but, the hard_start_xmit method will insert the tag (it has to
- * be able to do this for bridged and other skbs that don't come
- * down the protocol stack in an orderly manner.
+ } else
+ /* If here, then we'll just make a normal looking ethernet
+ * frame, but, the hard_start_xmit method will insert the tag
+ * (it has to be able to do this for bridged and other skbs
+ * that don't come down the protocol stack in an orderly manner.
*/
- rc = dev->hard_header(skb, dev, type, daddr, saddr, len);
- }
+ rc = dev_hard_header(skb, dev, type, daddr, saddr, len);
return rc;
}
-int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
+static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
- struct net_device_stats *stats = vlan_dev_get_stats(dev);
+ struct net_device_stats *stats = &dev->stats;
struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
/* Handle non-VLAN frames if they are sent to us, for example by DHCP.
* OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
*/
- if (veth->h_vlan_proto != __constant_htons(ETH_P_8021Q)) {
+ if (veth->h_vlan_proto != htons(ETH_P_8021Q) ||
+ vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR) {
int orig_headroom = skb_headroom(skb);
unsigned short veth_TCI;
/* This is not a VLAN frame...but we can fix that! */
- VLAN_DEV_INFO(dev)->cnt_encap_on_xmit++;
+ vlan_dev_info(dev)->cnt_encap_on_xmit++;
-#ifdef VLAN_DEBUG
- printk(VLAN_DBG "%s: proto to encap: 0x%hx (hbo)\n",
- __FUNCTION__, htons(veth->h_vlan_proto));
-#endif
+ pr_debug("%s: proto to encap: 0x%hx\n",
+ __func__, ntohs(veth->h_vlan_proto));
/* Construct the second two bytes. This field looks something
* like:
* usr_priority: 3 bits (high bits)
* CFI 1 bit
* VLAN ID 12 bits (low bits)
*/
- veth_TCI = VLAN_DEV_INFO(dev)->vlan_id;
+ veth_TCI = vlan_dev_info(dev)->vlan_id;
veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb);
skb = __vlan_put_tag(skb, veth_TCI);
return 0;
}
- if (orig_headroom < VLAN_HLEN) {
- VLAN_DEV_INFO(dev)->cnt_inc_headroom_on_tx++;
- }
+ if (orig_headroom < VLAN_HLEN)
+ vlan_dev_info(dev)->cnt_inc_headroom_on_tx++;
}
-#ifdef VLAN_DEBUG
- printk(VLAN_DBG "%s: about to send skb: %p to dev: %s\n",
- __FUNCTION__, skb, skb->dev->name);
- printk(VLAN_DBG " %2hx.%2hx.%2hx.%2xh.%2hx.%2hx %2hx.%2hx.%2hx.%2hx.%2hx.%2hx %4hx %4hx %4hx\n",
- veth->h_dest[0], veth->h_dest[1], veth->h_dest[2], veth->h_dest[3], veth->h_dest[4], veth->h_dest[5],
- veth->h_source[0], veth->h_source[1], veth->h_source[2], veth->h_source[3], veth->h_source[4], veth->h_source[5],
- veth->h_vlan_proto, veth->h_vlan_TCI, veth->h_vlan_encapsulated_proto);
-#endif
+ pr_debug("%s: about to send skb: %p to dev: %s\n",
+ __func__, skb, skb->dev->name);
+ pr_debug(" " MAC_FMT " " MAC_FMT " %4hx %4hx %4hx\n",
+ veth->h_dest[0], veth->h_dest[1], veth->h_dest[2],
+ veth->h_dest[3], veth->h_dest[4], veth->h_dest[5],
+ veth->h_source[0], veth->h_source[1], veth->h_source[2],
+ veth->h_source[3], veth->h_source[4], veth->h_source[5],
+ veth->h_vlan_proto, veth->h_vlan_TCI,
+ veth->h_vlan_encapsulated_proto);
stats->tx_packets++; /* for statics only */
stats->tx_bytes += skb->len;
- skb->dev = VLAN_DEV_INFO(dev)->real_dev;
+ skb->dev = vlan_dev_info(dev)->real_dev;
dev_queue_xmit(skb);
return 0;
}
-int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
+static int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
{
- struct net_device_stats *stats = vlan_dev_get_stats(dev);
+ struct net_device_stats *stats = &dev->stats;
unsigned short veth_TCI;
/* Construct the second two bytes. This field looks something
* CFI 1 bit
* VLAN ID 12 bits (low bits)
*/
- veth_TCI = VLAN_DEV_INFO(dev)->vlan_id;
+ veth_TCI = vlan_dev_info(dev)->vlan_id;
veth_TCI |= vlan_dev_get_egress_qos_mask(dev, skb);
skb = __vlan_hwaccel_put_tag(skb, veth_TCI);
stats->tx_packets++;
stats->tx_bytes += skb->len;
- skb->dev = VLAN_DEV_INFO(dev)->real_dev;
+ skb->dev = vlan_dev_info(dev)->real_dev;
dev_queue_xmit(skb);
return 0;
}
-int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
+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)
+ if (vlan_dev_info(dev)->real_dev->mtu < new_mtu)
return -ERANGE;
dev->mtu = new_mtu;
return 0;
}
-int vlan_dev_set_ingress_priority(char *dev_name, __u32 skb_prio, short vlan_prio)
+void vlan_dev_set_ingress_priority(const struct net_device *dev,
+ u32 skb_prio, short vlan_prio)
{
- struct net_device *dev = dev_get_by_name(dev_name);
+ struct vlan_dev_info *vlan = vlan_dev_info(dev);
- if (dev) {
- if (dev->priv_flags & IFF_802_1Q_VLAN) {
- /* see if a priority mapping exists.. */
- VLAN_DEV_INFO(dev)->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
- dev_put(dev);
- return 0;
- }
+ 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++;
- dev_put(dev);
- }
- return -EINVAL;
+ vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
}
-int vlan_dev_set_egress_priority(char *dev_name, __u32 skb_prio, short vlan_prio)
+int vlan_dev_set_egress_priority(const struct net_device *dev,
+ u32 skb_prio, short vlan_prio)
{
- struct net_device *dev = dev_get_by_name(dev_name);
+ struct vlan_dev_info *vlan = vlan_dev_info(dev);
struct vlan_priority_tci_mapping *mp = NULL;
struct vlan_priority_tci_mapping *np;
-
- if (dev) {
- if (dev->priv_flags & IFF_802_1Q_VLAN) {
- /* See if a priority mapping exists.. */
- mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF];
- while (mp) {
- if (mp->priority == skb_prio) {
- mp->vlan_qos = ((vlan_prio << 13) & 0xE000);
- dev_put(dev);
- return 0;
- }
- mp = mp->next;
- }
-
- /* Create a new mapping then. */
- mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF];
- np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
- if (np) {
- np->next = mp;
- np->priority = skb_prio;
- np->vlan_qos = ((vlan_prio << 13) & 0xE000);
- VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF] = np;
- dev_put(dev);
- return 0;
- } else {
- dev_put(dev);
- return -ENOBUFS;
- }
+ u32 vlan_qos = (vlan_prio << 13) & 0xE000;
+
+ /* 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;
}
- dev_put(dev);
+ mp = mp->next;
}
- return -EINVAL;
+
+ /* 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_dev_info class in include/linux/if_vlan.h file. */
-int vlan_dev_set_vlan_flag(char *dev_name, __u32 flag, short flag_val)
+/* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */
+int vlan_dev_set_vlan_flag(const struct net_device *dev,
+ u32 flag, short flag_val)
{
- struct net_device *dev = dev_get_by_name(dev_name);
-
- if (dev) {
- if (dev->priv_flags & IFF_802_1Q_VLAN) {
- /* verify flag is supported */
- if (flag == 1) {
- if (flag_val) {
- VLAN_DEV_INFO(dev)->flags |= 1;
- } else {
- VLAN_DEV_INFO(dev)->flags &= ~1;
- }
- dev_put(dev);
- return 0;
- } else {
- printk(KERN_ERR "%s: flag %i is not valid.\n",
- __FUNCTION__, (int)(flag));
- dev_put(dev);
- return -EINVAL;
- }
- } else {
- printk(KERN_ERR
- "%s: %s is not a vlan device, priv_flags: %hX.\n",
- __FUNCTION__, dev->name, dev->priv_flags);
- dev_put(dev);
- }
- } else {
- printk(KERN_ERR "%s: Could not find device: %s\n",
- __FUNCTION__, dev_name);
+ /* verify flag is supported */
+ if (flag == VLAN_FLAG_REORDER_HDR) {
+ if (flag_val)
+ vlan_dev_info(dev)->flags |= VLAN_FLAG_REORDER_HDR;
+ else
+ vlan_dev_info(dev)->flags &= ~VLAN_FLAG_REORDER_HDR;
+ return 0;
}
-
return -EINVAL;
}
-
-int vlan_dev_get_realdev_name(const char *dev_name, char* result)
+void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
{
- struct net_device *dev = dev_get_by_name(dev_name);
- int rv = 0;
- if (dev) {
- if (dev->priv_flags & IFF_802_1Q_VLAN) {
- strncpy(result, VLAN_DEV_INFO(dev)->real_dev->name, 23);
- rv = 0;
- } else {
- rv = -EINVAL;
- }
- dev_put(dev);
- } else {
- rv = -ENODEV;
- }
- return rv;
+ strncpy(result, vlan_dev_info(dev)->real_dev->name, 23);
}
-int vlan_dev_get_vid(const char *dev_name, unsigned short* result)
+void vlan_dev_get_vid(const struct net_device *dev, unsigned short *result)
{
- struct net_device *dev = dev_get_by_name(dev_name);
- int rv = 0;
- if (dev) {
- if (dev->priv_flags & IFF_802_1Q_VLAN) {
- *result = VLAN_DEV_INFO(dev)->vlan_id;
- rv = 0;
- } else {
- rv = -EINVAL;
- }
- dev_put(dev);
- } else {
- rv = -ENODEV;
- }
- return rv;
+ *result = vlan_dev_info(dev)->vlan_id;
}
-
-int vlan_dev_set_mac_address(struct net_device *dev, void *addr_struct_p)
+static int vlan_dev_open(struct net_device *dev)
{
- struct sockaddr *addr = (struct sockaddr *)(addr_struct_p);
- int i;
-
- if (netif_running(dev))
- return -EBUSY;
-
- memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
+ struct vlan_dev_info *vlan = vlan_dev_info(dev);
+ struct net_device *real_dev = vlan->real_dev;
+ int err;
- printk("%s: Setting MAC address to ", dev->name);
- for (i = 0; i < 6; i++)
- printk(" %2.2x", dev->dev_addr[i]);
- printk(".\n");
-
- if (memcmp(VLAN_DEV_INFO(dev)->real_dev->dev_addr,
- dev->dev_addr,
- dev->addr_len) != 0) {
- if (!(VLAN_DEV_INFO(dev)->real_dev->flags & IFF_PROMISC)) {
- int flgs = VLAN_DEV_INFO(dev)->real_dev->flags;
-
- /* Increment our in-use promiscuity counter */
- dev_set_promiscuity(VLAN_DEV_INFO(dev)->real_dev, 1);
+ if (!(real_dev->flags & IFF_UP))
+ return -ENETDOWN;
- /* Make PROMISC visible to the user. */
- flgs |= IFF_PROMISC;
- printk("VLAN (%s): Setting underlying device (%s) to promiscious mode.\n",
- dev->name, VLAN_DEV_INFO(dev)->real_dev->name);
- dev_change_flags(VLAN_DEV_INFO(dev)->real_dev, flgs);
- }
- } else {
- printk("VLAN (%s): Underlying device (%s) has same MAC, not checking promiscious mode.\n",
- dev->name, VLAN_DEV_INFO(dev)->real_dev->name);
+ 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);
return 0;
}
-static inline int vlan_dmi_equals(struct dev_mc_list *dmi1,
- struct dev_mc_list *dmi2)
+static int vlan_dev_stop(struct net_device *dev)
{
- return ((dmi1->dmi_addrlen == dmi2->dmi_addrlen) &&
- (memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0));
-}
+ struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
-/** dmi is a single entry into a dev_mc_list, a single node. mc_list is
- * an entire list, and we'll iterate through it.
- */
-static int vlan_should_add_mc(struct dev_mc_list *dmi, struct dev_mc_list *mc_list)
-{
- struct dev_mc_list *idmi;
-
- for (idmi = mc_list; idmi != NULL; ) {
- if (vlan_dmi_equals(dmi, idmi)) {
- if (dmi->dmi_users > idmi->dmi_users)
- return 1;
- else
- return 0;
- } else {
- idmi = idmi->next;
- }
- }
+ 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);
- return 1;
-}
-
-static inline void vlan_destroy_mc_list(struct dev_mc_list *mc_list)
-{
- struct dev_mc_list *dmi = mc_list;
- struct dev_mc_list *next;
+ if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
+ dev_unicast_delete(real_dev, dev->dev_addr, dev->addr_len);
- while(dmi) {
- next = dmi->next;
- kfree(dmi);
- dmi = next;
- }
+ return 0;
}
-static void vlan_copy_mc_list(struct dev_mc_list *mc_list, struct vlan_dev_info *vlan_info)
+static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
{
- struct dev_mc_list *dmi, *new_dmi;
+ struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
+ struct sockaddr *addr = p;
+ int err;
- vlan_destroy_mc_list(vlan_info->old_mc_list);
- vlan_info->old_mc_list = NULL;
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
- for (dmi = mc_list; dmi != NULL; dmi = dmi->next) {
- new_dmi = kmalloc(sizeof(*new_dmi), GFP_ATOMIC);
- if (new_dmi == NULL) {
- printk(KERN_ERR "vlan: cannot allocate memory. "
- "Multicast may not work properly from now.\n");
- return;
- }
+ if (!(dev->flags & IFF_UP))
+ goto out;
- /* Copy whole structure, then make new 'next' pointer */
- *new_dmi = *dmi;
- new_dmi->next = vlan_info->old_mc_list;
- vlan_info->old_mc_list = new_dmi;
+ 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;
}
-}
-
-static void vlan_flush_mc_list(struct net_device *dev)
-{
- struct dev_mc_list *dmi = dev->mc_list;
-
- while (dmi) {
- printk(KERN_DEBUG "%s: del %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address from vlan interface\n",
- dev->name,
- dmi->dmi_addr[0],
- dmi->dmi_addr[1],
- dmi->dmi_addr[2],
- dmi->dmi_addr[3],
- dmi->dmi_addr[4],
- dmi->dmi_addr[5]);
- dev_mc_delete(dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
- dmi = dev->mc_list;
- }
-
- /* dev->mc_list is NULL by the time we get here. */
- vlan_destroy_mc_list(VLAN_DEV_INFO(dev)->old_mc_list);
- VLAN_DEV_INFO(dev)->old_mc_list = NULL;
-}
-int vlan_dev_open(struct net_device *dev)
-{
- if (!(VLAN_DEV_INFO(dev)->real_dev->flags & IFF_UP))
- return -ENETDOWN;
+ 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;
}
-int vlan_dev_stop(struct net_device *dev)
+static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
- vlan_flush_mc_list(dev);
- return 0;
-}
-
-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 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) {
+ switch (cmd) {
case SIOCGMIIPHY:
case SIOCGMIIREG:
case SIOCSMIIREG:
- if (real_dev->do_ioctl && netif_device_present(real_dev))
+ if (real_dev->do_ioctl && netif_device_present(real_dev))
err = real_dev->do_ioctl(real_dev, &ifrr, cmd);
break;
-
- case SIOCETHTOOL:
- err = dev_ethtool(&ifrr);
}
- if (!err)
+ if (!err)
ifr->ifr_ifru = ifrr.ifr_ifru;
return err;
}
-/** Taken from Gleb + Lennert's VLAN code, and modified... */
-void vlan_dev_set_multicast_list(struct net_device *vlan_dev)
+static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
{
- struct dev_mc_list *dmi;
- struct net_device *real_dev;
- int inc;
-
- if (vlan_dev && (vlan_dev->priv_flags & IFF_802_1Q_VLAN)) {
- /* Then it's a real vlan device, as far as we can tell.. */
- real_dev = VLAN_DEV_INFO(vlan_dev)->real_dev;
-
- /* compare the current promiscuity to the last promisc we had.. */
- inc = vlan_dev->promiscuity - VLAN_DEV_INFO(vlan_dev)->old_promiscuity;
- if (inc) {
- printk(KERN_INFO "%s: dev_set_promiscuity(master, %d)\n",
- vlan_dev->name, inc);
- dev_set_promiscuity(real_dev, inc); /* found in dev.c */
- VLAN_DEV_INFO(vlan_dev)->old_promiscuity = vlan_dev->promiscuity;
- }
+ struct net_device *real_dev = vlan_dev_info(dev)->real_dev;
- inc = vlan_dev->allmulti - VLAN_DEV_INFO(vlan_dev)->old_allmulti;
- if (inc) {
- printk(KERN_INFO "%s: dev_set_allmulti(master, %d)\n",
- vlan_dev->name, inc);
- dev_set_allmulti(real_dev, inc); /* dev.c */
- VLAN_DEV_INFO(vlan_dev)->old_allmulti = vlan_dev->allmulti;
- }
+ 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);
+}
- /* looking for addresses to add to master's list */
- for (dmi = vlan_dev->mc_list; dmi != NULL; dmi = dmi->next) {
- if (vlan_should_add_mc(dmi, VLAN_DEV_INFO(vlan_dev)->old_mc_list)) {
- dev_mc_add(real_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
- printk(KERN_DEBUG "%s: add %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address to master interface\n",
- vlan_dev->name,
- dmi->dmi_addr[0],
- dmi->dmi_addr[1],
- dmi->dmi_addr[2],
- dmi->dmi_addr[3],
- dmi->dmi_addr[4],
- dmi->dmi_addr[5]);
- }
- }
+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);
+}
- /* looking for addresses to delete from master's list */
- for (dmi = VLAN_DEV_INFO(vlan_dev)->old_mc_list; dmi != NULL; dmi = dmi->next) {
- if (vlan_should_add_mc(dmi, vlan_dev->mc_list)) {
- /* if we think we should add it to the new list, then we should really
- * delete it from the real list on the underlying device.
- */
- dev_mc_delete(real_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
- printk(KERN_DEBUG "%s: del %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address from master interface\n",
- vlan_dev->name,
- dmi->dmi_addr[0],
- dmi->dmi_addr[1],
- dmi->dmi_addr[2],
- dmi->dmi_addr[3],
- dmi->dmi_addr[4],
- dmi->dmi_addr[5]);
- }
- }
+/*
+ * 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 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);
+
+ /* 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;
+ }
- /* save multicast list */
- vlan_copy_mc_list(vlan_dev->mc_list, VLAN_DEV_INFO(vlan_dev));
+ if (real_dev->priv_flags & IFF_802_1Q_VLAN)
+ subclass = 1;
+
+ lockdep_set_class_and_subclass(&dev->_xmit_lock,
+ &vlan_netdev_xmit_lock_key, 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);
+ }
}
}
+
+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;
+
+ memset(dev->broadcast, 0, ETH_ALEN);
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff