1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 7b816a032957..970ec4793442 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -67,9 +67,42 @@
 #include <asm/system.h>
 #include <asm/uaccess.h>
 
+/* Uncomment to enable debugging */
+/* #define TUN_DEBUG 1 */
+
 #ifdef TUN_DEBUG
 static int debug;
+
+#define DBG  if(tun->debug)printk
+#define DBG1 if(debug==2)printk
+#else
+#define DBG( a... )
+#define DBG1( a... )
+#endif
+
+struct tun_struct {
+        struct list_head        list;
+        unsigned long           flags;
+        int                     attached;
+        uid_t                   owner;
+        gid_t                   group;
+
+        wait_queue_head_t       read_wait;
+        struct sk_buff_head     readq;
+
+        struct net_device       *dev;
+
+        struct fasync_struct    *fasync;
+
+        unsigned long if_flags;
+        u8 dev_addr[ETH_ALEN];
+        u32 chr_filter[2];
+        u32 net_filter[2];
+
+#ifdef TUN_DEBUG
+        int debug;
 #endif
+};
 
 /* Network device part of the driver */