mac802154: slave interfaces declaration

Slaves represent typical network interfaces available from userspace.
Each ieee802154 device/transceiver may have several slaves and able
to be associated with several networks at the same time. So this
patch adds structure for slaves declaration.

Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mac802154/mac802154.h

@@ -58,6 +58,34 @@ struct mac802154_priv {
 #define	MAC802154_DEVICE_STOPPED	0x00
 #define MAC802154_DEVICE_RUN		0x01
 
+/* Slave interface definition.
+ *
+ * Slaves represent typical network interfaces available from userspace.
+ * Each ieee802154 device/transceiver may have several slaves and able
+ * to be associated with several networks at the same time.
+ */
+struct mac802154_sub_if_data {
+	struct list_head list; /* the ieee802154_priv->slaves list */
+
+	struct mac802154_priv *hw;
+	struct net_device *dev;
+
+	int type;
+
+	spinlock_t mib_lock;
+
+	__le16 pan_id;
+	__le16 short_addr;
+
+	u8 chan;
+	u8 page;
+
+	/* MAC BSN field */
+	u8 bsn;
+	/* MAC DSN field */
+	u8 dsn;
+};
+
 #define mac802154_to_priv(_hw)	container_of(_hw, struct mac802154_priv, hw)
 
 #define MAC802154_MAX_XMIT_ATTEMPTS	3