Split code out into separate compilation units (first pass, anyway).

nbdtypes.h

@@ -0,0 +1,36 @@
+#ifndef __NBDTYPES_H
+#define __NBDTYPES_H
+
+/* http://linux.derkeiler.com/Mailing-Lists/Kernel/2003-09/2332.html */
+#define INIT_PASSWD "NBDMAGIC" 
+#define INIT_MAGIC 0x0000420281861253 
+#define REQUEST_MAGIC 0x25609513 
+#define REPLY_MAGIC 0x67446698 
+#define REQUEST_READ 0 
+#define REQUEST_WRITE 1 
+#define REQUEST_DISCONNECT 2 
+
+#include <linux/types.h>
+struct nbd_init {
+	char passwd[8];
+	__be64 magic;
+	__be64 size;
+	char reserved[128];
+};
+
+struct nbd_request {
+        __be32 magic;
+        __be32 type;    /* == READ || == WRITE  */
+        char handle[8];
+        __be64 from;
+        __be32 len;
+} __attribute__((packed));
+
+struct nbd_reply {
+        __be32 magic;
+        __be32 error;           /* 0 = ok, else error   */
+        char handle[8];         /* handle you got from request  */
+};
+
+#endif
+