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diff --git a/xlators/storage/bd_map/src/bd_map.h b/xlators/storage/bd_map/src/bd_map.h
new file mode 100644
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+++ b/xlators/storage/bd_map/src/bd_map.h
@@ -0,0 +1,75 @@
+/*
+  BD translator - Exports Block devices on server side as regular
+  files to client
+
+  Copyright IBM, Corp. 2012
+
+  This file is part of GlusterFS.
+
+  Author:
+  M. Mohan Kumar <mohan@in.ibm.com>
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+#ifndef _BD_MAP_H
+#define _BD_MAP_H
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "mem-types.h"
+
+#define BD_XLATOR "block device mapper xlator"
+
+#define BACKEND_VG "vg"
+
+enum gf_bd_mem_types_ {
+        gf_bd_fd = gf_common_mt_end + 1,
+        gf_bd_private,
+        gf_bd_entry,
+        gf_bd_attr,
+        gf_bd_mt_end
+};
+
+/*
+ * Each BD/LV is represented by this data structure
+ * Usually root entry will have only children and there is no sibling for that
+ * All other entries may have children and/or sibling entries
+ * If an entry is a Volume Group it will have child (. & .. and Logical
+ * Volumes) and also other Volume groups will be a sibling for this
+ */
+typedef struct bd_entry {
+        struct list_head child; /* List to child */
+        struct list_head sibling; /* List of siblings */
+        struct bd_entry  *parent;/* Parent of this node */
+        struct bd_entry  *link; /* Link to actual entry, if its . or .. */
+        char             name[NAME_MAX];
+        struct iatt      *attr;
+        int              refcnt;
+        uint64_t         size;
+        pthread_rwlock_t lock;
+} bd_entry_t;
+
+
+/**
+ * bd_fd - internal structure common to file and directory fd's
+ */
+typedef struct bd_fd {
+        bd_entry_t      *entry;
+        bd_entry_t      *p_entry; /* Parent entry */
+} bd_fd_t;
+
+typedef struct bd_priv {
+        lvm_t             handle;
+        pthread_rwlock_t  lock;
+        char              *vg;
+} bd_priv_t;
+
+#endif