Merge branch 'master' into csb1725

[mv-sheeva.git] / include / linux / if_vlan.h

diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 3d870fda8c4ff3ca3477796a9c454e01e4598996..635e1faec412db465a429a626da4c373510f2d98 100644 (file)
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -16,6 +16,7 @@
 #ifdef __KERNEL__
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
+#include <linux/rtnetlink.h>
 
 #define VLAN_HLEN      4               /* The additional bytes (on top of the Ethernet header)
                                         * that VLAN requires.
@@ -68,6 +69,7 @@ static inline struct vlan_ethhdr *vlan_eth_hdr(const struct sk_buff *skb)
 #define VLAN_CFI_MASK          0x1000 /* Canonical Format Indicator */
 #define VLAN_TAG_PRESENT       VLAN_CFI_MASK
 #define VLAN_VID_MASK          0x0fff /* VLAN Identifier */
+#define VLAN_N_VID             4096
 
 /* found in socket.c */
 extern void vlan_ioctl_set(int (*hook)(struct net *, void __user *));
@@ -76,9 +78,8 @@ extern void vlan_ioctl_set(int (*hook)(struct net *, void __user *));
  * depends on completely exhausting the VLAN identifier space.  Thus
  * it gives constant time look-up, but in many cases it wastes memory.
  */
-#define VLAN_GROUP_ARRAY_LEN          4096
 #define VLAN_GROUP_ARRAY_SPLIT_PARTS  8
-#define VLAN_GROUP_ARRAY_PART_LEN     (VLAN_GROUP_ARRAY_LEN/VLAN_GROUP_ARRAY_SPLIT_PARTS)
+#define VLAN_GROUP_ARRAY_PART_LEN     (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS)
 
 struct vlan_group {
        struct net_device       *real_dev; /* The ethernet(like) device
@@ -114,12 +115,24 @@ static inline void vlan_group_set_device(struct vlan_group *vg,
 #define vlan_tx_tag_get(__skb)         ((__skb)->vlan_tci & ~VLAN_TAG_PRESENT)
 
 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+/* Must be invoked with rcu_read_lock or with RTNL. */
+static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
+                                              u16 vlan_id)
+{
+       struct vlan_group *grp = rcu_dereference_rtnl(real_dev->vlgrp);
+
+       if (grp)
+               return vlan_group_get_device(grp, vlan_id);
+
+       return NULL;
+}
+
 extern struct net_device *vlan_dev_real_dev(const struct net_device *dev);
 extern u16 vlan_dev_vlan_id(const struct net_device *dev);
 
 extern int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
                             u16 vlan_tci, int polling);
-extern int vlan_hwaccel_do_receive(struct sk_buff *skb);
+extern bool vlan_hwaccel_do_receive(struct sk_buff **skb);
 extern gro_result_t
 vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
                 unsigned int vlan_tci, struct sk_buff *skb);
@@ -128,6 +141,12 @@ vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
               unsigned int vlan_tci);
 
 #else
+static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
+                                              u16 vlan_id)
+{
+       return NULL;
+}
+
 static inline struct net_device *vlan_dev_real_dev(const struct net_device *dev)
 {
        BUG();
@@ -147,9 +166,11 @@ static inline int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
        return NET_XMIT_SUCCESS;
 }
 
-static inline int vlan_hwaccel_do_receive(struct sk_buff *skb)
+static inline bool vlan_hwaccel_do_receive(struct sk_buff **skb)
 {
-       return 0;
+       if ((*skb)->vlan_tci & VLAN_VID_MASK)
+               (*skb)->pkt_type = PACKET_OTHERHOST;
+       return false;
 }
 
 static inline gro_result_t
@@ -318,6 +339,31 @@ static inline int vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci)
        }
 }
 
+/**
+ * vlan_get_protocol - get protocol EtherType.
+ * @skb: skbuff to query
+ *
+ * Returns the EtherType of the packet, regardless of whether it is
+ * vlan encapsulated (normal or hardware accelerated) or not.
+ */
+static inline __be16 vlan_get_protocol(const struct sk_buff *skb)
+{
+       __be16 protocol = 0;
+
+       if (vlan_tx_tag_present(skb) ||
+            skb->protocol != cpu_to_be16(ETH_P_8021Q))
+               protocol = skb->protocol;
+       else {
+               __be16 proto, *protop;
+               protop = skb_header_pointer(skb, offsetof(struct vlan_ethhdr,
+                                               h_vlan_encapsulated_proto),
+                                               sizeof(proto), &proto);
+               if (likely(protop))
+                       protocol = *protop;
+       }
+
+       return protocol;
+}
 #endif /* __KERNEL__ */
 
 /* VLAN IOCTLs are found in sockios.h */