1 files changed, 33 insertions, 9 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 7c1d4466583b..25f87102ab66 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -88,19 +88,23 @@ struct wireless_dev;
 #define NETDEV_TX_BUSY 1        /* driver tx path was busy*/
 #define NETDEV_TX_LOCKED -1     /* driver tx lock was already taken */
+#ifdef  __KERNEL__
 /*
 *      Compute the worst case header length according to the protocols
 *      used.
 */
 
-#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
+#if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
-#define LL_MAX_HEADER   32
+# if defined(CONFIG_MAC80211_MESH)
-#else
+#  define LL_MAX_HEADER 128
-#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
+# else
-#define LL_MAX_HEADER   96
+#  define LL_MAX_HEADER 96
+# endif
+#elif defined(CONFIG_TR)
+# define LL_MAX_HEADER 48
 #else
-#define LL_MAX_HEADER   48
+# define LL_MAX_HEADER 32
-#endif
 #endif
 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
@@ -112,6 +116,8 @@ struct wireless_dev;
 #define MAX_HEADER (LL_MAX_HEADER + 48)
 #endif
+#endif  /*  __KERNEL__  */
 struct net_device_subqueue
 {
        /* Give a control state for each queue.  This struct may contain
@@ -244,11 +250,16 @@ struct hh_cache
 *
 * We could use other alignment values, but we must maintain the
 * relationship HH alignment <= LL alignment.
+ *
+ * LL_ALLOCATED_SPACE also takes into account the tailroom the device
+ * may need.
 */
 #define LL_RESERVED_SPACE(dev) \
-        (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
+        ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
-        ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
+        ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
+#define LL_ALLOCATED_SPACE(dev) \
+        ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
 struct header_ops {
        int     (*create) (struct sk_buff *skb, struct net_device *dev,
@@ -567,6 +578,13 @@ struct net_device
        unsigned short          type;   /* interface hardware type      */
        unsigned short          hard_header_len;        /* hardware hdr length  */
+        /* extra head- and tailroom the hardware may need, but not in all cases
+         * can this be guaranteed, especially tailroom. Some cases also use
+         * LL_MAX_HEADER instead to allocate the skb.
+         */
+        unsigned short          needed_headroom;
+        unsigned short          needed_tailroom;
        struct net_device       *master; /* Pointer to master device of a group,
                                          * which this device is member of.
                                          */
@@ -715,6 +733,9 @@ struct net_device
        struct net              *nd_net;
 #endif
+        /* mid-layer private */
+        void                    *ml_priv;
        /* bridge stuff */
        struct net_bridge_port  *br_port;
        /* macvlan */
@@ -728,6 +749,9 @@ struct net_device
        /* rtnetlink link ops */
        const struct rtnl_link_ops *rtnl_link_ops;
+        /* VLAN feature mask */
+        unsigned long vlan_features;
        /* for setting kernel sock attribute on TCP connection setup */
 #define GSO_MAX_SIZE            65536
        unsigned int            gso_max_size;