* used.
*/
-#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
-#define LL_MAX_HEADER 32
+#if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
+# if defined(CONFIG_MAC80211_MESH)
+# define LL_MAX_HEADER 128
+# else
+# define LL_MAX_HEADER 96
+# endif
+#elif defined(CONFIG_TR)
+# define LL_MAX_HEADER 48
#else
-#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
-#define LL_MAX_HEADER 96
-#else
-#define LL_MAX_HEADER 48
-#endif
+# define LL_MAX_HEADER 32
#endif
#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
*
* 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,
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.
*/
struct net *nd_net;
#endif
+ /* mid-layer private */
+ void *ml_priv;
+
/* bridge stuff */
struct net_bridge_port *br_port;
/* macvlan */