summaryrefslogtreecommitdiffstats
path: root/include/linux/if_vlan.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/if_vlan.h')
-rw-r--r--include/linux/if_vlan.h238
1 files changed, 71 insertions, 167 deletions
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 15ace02b7b2..9e7b49b8062 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -14,10 +14,6 @@
#define _LINUX_IF_VLAN_H_
#ifdef __KERNEL__
-
-/* externally defined structs */
-struct hlist_node;
-
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
@@ -91,7 +87,7 @@ struct vlan_group {
};
static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
- unsigned int vlan_id)
+ u16 vlan_id)
{
struct net_device **array;
array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
@@ -99,7 +95,7 @@ static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
}
static inline void vlan_group_set_device(struct vlan_group *vg,
- unsigned int vlan_id,
+ u16 vlan_id,
struct net_device *dev)
{
struct net_device **array;
@@ -109,164 +105,81 @@ static inline void vlan_group_set_device(struct vlan_group *vg,
array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
}
-struct vlan_priority_tci_mapping {
- u32 priority;
- unsigned short vlan_qos; /* This should be shifted when first set, so we only do it
- * at provisioning time.
- * ((skb->priority << 13) & 0xE000)
- */
- struct vlan_priority_tci_mapping *next;
-};
+#define vlan_tx_tag_present(__skb) ((__skb)->vlan_tci)
+#define vlan_tx_tag_get(__skb) ((__skb)->vlan_tci)
-/* Holds information that makes sense if this device is a VLAN device. */
-struct vlan_dev_info {
- /** This will be the mapping that correlates skb->priority to
- * 3 bits of VLAN QOS tags...
- */
- unsigned int nr_ingress_mappings;
- u32 ingress_priority_map[8];
-
- unsigned int nr_egress_mappings;
- struct vlan_priority_tci_mapping *egress_priority_map[16]; /* hash table */
-
- unsigned short vlan_id; /* The VLAN Identifier for this interface. */
- unsigned short flags; /* (1 << 0) re_order_header This option will cause the
- * VLAN code to move around the ethernet header on
- * ingress to make the skb look **exactly** like it
- * came in from an ethernet port. This destroys some of
- * the VLAN information in the skb, but it fixes programs
- * like DHCP that use packet-filtering and don't understand
- * 802.1Q
- */
- struct net_device *real_dev; /* the underlying device/interface */
- unsigned char real_dev_addr[ETH_ALEN];
- struct proc_dir_entry *dent; /* Holds the proc data */
- unsigned long cnt_inc_headroom_on_tx; /* How many times did we have to grow the skb on TX. */
- unsigned long cnt_encap_on_xmit; /* How many times did we have to encapsulate the skb on TX. */
-};
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+extern struct net_device *vlan_dev_real_dev(const struct net_device *dev);
+extern u16 vlan_dev_vlan_id(const struct net_device *dev);
-static inline struct vlan_dev_info *vlan_dev_info(const struct net_device *dev)
+extern int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
+ u16 vlan_tci, int polling);
+#else
+static inline struct net_device *vlan_dev_real_dev(const struct net_device *dev)
{
- return netdev_priv(dev);
+ BUG();
+ return NULL;
}
-/* inline functions */
-static inline __u32 vlan_get_ingress_priority(struct net_device *dev,
- unsigned short vlan_tag)
+static inline u16 vlan_dev_vlan_id(const struct net_device *dev)
{
- struct vlan_dev_info *vip = vlan_dev_info(dev);
-
- return vip->ingress_priority_map[(vlan_tag >> 13) & 0x7];
+ BUG();
+ return 0;
}
-/* VLAN tx hw acceleration helpers. */
-struct vlan_skb_tx_cookie {
- u32 magic;
- u32 vlan_tag;
-};
-
-#define VLAN_TX_COOKIE_MAGIC 0x564c414e /* "VLAN" in ascii. */
-#define VLAN_TX_SKB_CB(__skb) ((struct vlan_skb_tx_cookie *)&((__skb)->cb[0]))
-#define vlan_tx_tag_present(__skb) \
- (VLAN_TX_SKB_CB(__skb)->magic == VLAN_TX_COOKIE_MAGIC)
-#define vlan_tx_tag_get(__skb) (VLAN_TX_SKB_CB(__skb)->vlan_tag)
-
-/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */
-static inline int __vlan_hwaccel_rx(struct sk_buff *skb,
- struct vlan_group *grp,
- unsigned short vlan_tag, int polling)
+static inline int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
+ u16 vlan_tci, int polling)
{
- struct net_device_stats *stats;
-
- if (skb_bond_should_drop(skb)) {
- dev_kfree_skb_any(skb);
- return NET_RX_DROP;
- }
-
- skb->dev = vlan_group_get_device(grp, vlan_tag & VLAN_VID_MASK);
- if (skb->dev == NULL) {
- dev_kfree_skb_any(skb);
-
- /* Not NET_RX_DROP, this is not being dropped
- * due to congestion.
- */
- return 0;
- }
-
- skb->dev->last_rx = jiffies;
-
- stats = &skb->dev->stats;
- stats->rx_packets++;
- stats->rx_bytes += skb->len;
-
- skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tag);
- switch (skb->pkt_type) {
- case PACKET_BROADCAST:
- break;
-
- case PACKET_MULTICAST:
- stats->multicast++;
- break;
-
- 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.
- */
- if (!compare_ether_addr(eth_hdr(skb)->h_dest,
- skb->dev->dev_addr))
- skb->pkt_type = PACKET_HOST;
- break;
- };
-
- return (polling ? netif_receive_skb(skb) : netif_rx(skb));
+ BUG();
+ return NET_XMIT_SUCCESS;
}
+#endif
+/**
+ * vlan_hwaccel_rx - netif_rx wrapper for VLAN RX acceleration
+ * @skb: buffer
+ * @grp: vlan group
+ * @vlan_tci: VLAN TCI as received from the card
+ */
static inline int vlan_hwaccel_rx(struct sk_buff *skb,
struct vlan_group *grp,
- unsigned short vlan_tag)
+ u16 vlan_tci)
{
- return __vlan_hwaccel_rx(skb, grp, vlan_tag, 0);
+ return __vlan_hwaccel_rx(skb, grp, vlan_tci, 0);
}
+/**
+ * vlan_hwaccel_receive_skb - netif_receive_skb wrapper for VLAN RX acceleration
+ * @skb: buffer
+ * @grp: vlan group
+ * @vlan_tci: VLAN TCI as received from the card
+ */
static inline int vlan_hwaccel_receive_skb(struct sk_buff *skb,
struct vlan_group *grp,
- unsigned short vlan_tag)
+ u16 vlan_tci)
{
- return __vlan_hwaccel_rx(skb, grp, vlan_tag, 1);
+ return __vlan_hwaccel_rx(skb, grp, vlan_tci, 1);
}
/**
* __vlan_put_tag - regular VLAN tag inserting
* @skb: skbuff to tag
- * @tag: VLAN tag to insert
+ * @vlan_tci: VLAN TCI to insert
*
* Inserts the VLAN tag into @skb as part of the payload
* Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
- *
+ *
* Following the skb_unshare() example, in case of error, the calling function
* doesn't have to worry about freeing the original skb.
*/
-static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, unsigned short tag)
+static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, u16 vlan_tci)
{
struct vlan_ethhdr *veth;
- if (skb_headroom(skb) < VLAN_HLEN) {
- struct sk_buff *sk_tmp = skb;
- skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN);
- kfree_skb(sk_tmp);
- if (!skb) {
- printk(KERN_ERR "vlan: failed to realloc headroom\n");
- return NULL;
- }
- } else {
- skb = skb_unshare(skb, GFP_ATOMIC);
- if (!skb) {
- printk(KERN_ERR "vlan: failed to unshare skbuff\n");
- return NULL;
- }
+ if (skb_cow_head(skb, VLAN_HLEN) < 0) {
+ kfree_skb(skb);
+ return NULL;
}
-
veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
/* Move the mac addresses to the beginning of the new header. */
@@ -275,12 +188,10 @@ static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, unsigned short
/* first, the ethernet type */
veth->h_vlan_proto = htons(ETH_P_8021Q);
- /* now, the tag */
- veth->h_vlan_TCI = htons(tag);
+ /* now, the TCI */
+ veth->h_vlan_TCI = htons(vlan_tci);
skb->protocol = htons(ETH_P_8021Q);
- skb->mac_header -= VLAN_HLEN;
- skb->network_header -= VLAN_HLEN;
return skb;
}
@@ -288,18 +199,14 @@ static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, unsigned short
/**
* __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting
* @skb: skbuff to tag
- * @tag: VLAN tag to insert
+ * @vlan_tci: VLAN TCI to insert
*
- * Puts the VLAN tag in @skb->cb[] and lets the device do the rest
+ * Puts the VLAN TCI in @skb->vlan_tci and lets the device do the rest
*/
-static inline struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb, unsigned short tag)
+static inline struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb,
+ u16 vlan_tci)
{
- struct vlan_skb_tx_cookie *cookie;
-
- cookie = VLAN_TX_SKB_CB(skb);
- cookie->magic = VLAN_TX_COOKIE_MAGIC;
- cookie->vlan_tag = tag;
-
+ skb->vlan_tci = vlan_tci;
return skb;
}
@@ -308,28 +215,28 @@ static inline struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb, unsign
/**
* vlan_put_tag - inserts VLAN tag according to device features
* @skb: skbuff to tag
- * @tag: VLAN tag to insert
+ * @vlan_tci: VLAN TCI to insert
*
* Assumes skb->dev is the target that will xmit this frame.
* Returns a VLAN tagged skb.
*/
-static inline struct sk_buff *vlan_put_tag(struct sk_buff *skb, unsigned short tag)
+static inline struct sk_buff *vlan_put_tag(struct sk_buff *skb, u16 vlan_tci)
{
if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
- return __vlan_hwaccel_put_tag(skb, tag);
+ return __vlan_hwaccel_put_tag(skb, vlan_tci);
} else {
- return __vlan_put_tag(skb, tag);
+ return __vlan_put_tag(skb, vlan_tci);
}
}
/**
* __vlan_get_tag - get the VLAN ID that is part of the payload
* @skb: skbuff to query
- * @tag: buffer to store vlaue
- *
+ * @vlan_tci: buffer to store vlaue
+ *
* Returns error if the skb is not of VLAN type
*/
-static inline int __vlan_get_tag(const struct sk_buff *skb, unsigned short *tag)
+static inline int __vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci)
{
struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb->data;
@@ -337,29 +244,25 @@ static inline int __vlan_get_tag(const struct sk_buff *skb, unsigned short *tag)
return -EINVAL;
}
- *tag = ntohs(veth->h_vlan_TCI);
-
+ *vlan_tci = ntohs(veth->h_vlan_TCI);
return 0;
}
/**
* __vlan_hwaccel_get_tag - get the VLAN ID that is in @skb->cb[]
* @skb: skbuff to query
- * @tag: buffer to store vlaue
- *
- * Returns error if @skb->cb[] is not set correctly
+ * @vlan_tci: buffer to store vlaue
+ *
+ * Returns error if @skb->vlan_tci is not set correctly
*/
static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
- unsigned short *tag)
+ u16 *vlan_tci)
{
- struct vlan_skb_tx_cookie *cookie;
-
- cookie = VLAN_TX_SKB_CB(skb);
- if (cookie->magic == VLAN_TX_COOKIE_MAGIC) {
- *tag = cookie->vlan_tag;
+ if (vlan_tx_tag_present(skb)) {
+ *vlan_tci = skb->vlan_tci;
return 0;
} else {
- *tag = 0;
+ *vlan_tci = 0;
return -EINVAL;
}
}
@@ -369,16 +272,16 @@ static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
/**
* vlan_get_tag - get the VLAN ID from the skb
* @skb: skbuff to query
- * @tag: buffer to store vlaue
- *
+ * @vlan_tci: buffer to store vlaue
+ *
* Returns error if the skb is not VLAN tagged
*/
-static inline int vlan_get_tag(const struct sk_buff *skb, unsigned short *tag)
+static inline int vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci)
{
if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
- return __vlan_hwaccel_get_tag(skb, tag);
+ return __vlan_hwaccel_get_tag(skb, vlan_tci);
} else {
- return __vlan_get_tag(skb, tag);
+ return __vlan_get_tag(skb, vlan_tci);
}
}
@@ -402,6 +305,7 @@ enum vlan_ioctl_cmds {
enum vlan_flags {
VLAN_FLAG_REORDER_HDR = 0x1,
+ VLAN_FLAG_GVRP = 0x2,
};
enum vlan_name_types {