Index: uspace/app/mkexfat/exfat.h
===================================================================
--- uspace/app/mkexfat/exfat.h	(revision 116cb910fa4dc220c3e250c165417a58ca7c95b0)
+++ uspace/app/mkexfat/exfat.h	(revision acb866ae8543dfb11146d6a3a636f63d40165373)
@@ -33,4 +33,118 @@
 
 #include <sys/types.h>
+#include <stdint.h>
+#include <bool.h>
+
+#define EXFAT_FILENAME_LEN	255
+#define EXFAT_NAME_PART_LEN	15
+
+#define EXFAT_TYPE_UNUSED	0x00
+#define EXFAT_TYPE_USED		0x80
+#define EXFAT_TYPE_VOLLABEL	0x83
+#define EXFAT_TYPE_BITMAP	0x81
+#define EXFAT_TYPE_UCTABLE	0x82
+#define EXFAT_TYPE_GUID		0xA0
+#define EXFAT_TYPE_FILE		0x85
+#define EXFAT_TYPE_STREAM	0xC0
+#define EXFAT_TYPE_NAME		0xC1
+
+#define EXFAT_ATTR_RDONLY	0x01
+#define EXFAT_ATTR_HIDDEN	0x02
+#define EXFAT_ATTR_SYSTEM	0x04
+#define EXFAT_ATTR_SUBDIR	0x10
+#define EXFAT_ATTR_ARCHIVE	0x20
+
+
+/* All dentry structs should have 31 byte size */
+typedef struct {
+	uint8_t 	size;
+	uint16_t 	label[11];
+	uint8_t 	_reserved[8];
+} __attribute__ ((packed)) exfat_vollabel_dentry_t;
+
+typedef struct {
+	uint8_t 	flags;
+	uint8_t 	_reserved[18];
+	uint32_t 	firstc;
+	uint64_t 	size;
+} __attribute__ ((packed)) exfat_bitmap_dentry_t;
+
+typedef struct {
+	uint8_t 	_reserved1[3];
+	uint32_t 	checksum;
+	uint8_t 	_reserved2[12];
+	uint32_t 	firstc;
+	uint64_t 	size;
+} __attribute__ ((packed)) exfat_uctable_dentry_t;
+
+typedef struct {
+	uint8_t 	count; /* Always zero */ 
+	uint16_t 	checksum;
+	uint16_t 	flags;
+	uint8_t 	guid[16];
+	uint8_t 	_reserved[10];
+} __attribute__ ((packed)) exfat_guid_dentry_t;
+
+typedef struct {
+	uint8_t 	count;
+	uint16_t 	checksum;
+	uint16_t 	attr;
+	uint8_t 	_reserved1[2];
+	uint32_t 	ctime;
+	uint32_t 	mtime;
+	uint32_t 	atime;
+	uint8_t 	ctime_fine;
+	uint8_t 	mtime_fine;
+	uint8_t 	ctime_tz;
+	uint8_t 	mtime_tz;
+	uint8_t 	atime_tz;
+	uint8_t 	_reserved2[7];
+} __attribute__ ((packed)) exfat_file_dentry_t;
+
+typedef struct {
+	uint8_t 	flags;
+	uint8_t 	_reserved1[1];
+	uint8_t 	name_size;
+	uint16_t 	hash;
+	uint8_t 	_reserved2[2];
+	uint64_t 	valid_data_size;
+	uint8_t 	_reserved3[4];
+	uint32_t 	firstc;
+	uint64_t 	data_size;
+} __attribute__ ((packed)) exfat_stream_dentry_t;
+
+typedef struct {
+	uint8_t 	flags;
+	uint16_t 	name[EXFAT_NAME_PART_LEN];
+} __attribute__ ((packed)) exfat_name_dentry_t;
+
+
+typedef struct {
+	uint8_t type;
+	union {
+		exfat_vollabel_dentry_t	vollabel;
+		exfat_bitmap_dentry_t 	bitmap;
+		exfat_uctable_dentry_t 	uctable;
+		exfat_guid_dentry_t 	guid;
+		exfat_file_dentry_t 	file;
+		exfat_stream_dentry_t 	stream;
+		exfat_name_dentry_t 	name;
+	};
+} __attribute__ ((packed)) exfat_dentry_t;
+
+
+typedef enum {
+	EXFAT_DENTRY_SKIP,
+	EXFAT_DENTRY_LAST,
+	EXFAT_DENTRY_FREE,
+	EXFAT_DENTRY_VOLLABEL,
+	EXFAT_DENTRY_BITMAP,
+	EXFAT_DENTRY_UCTABLE,
+	EXFAT_DENTRY_GUID,
+	EXFAT_DENTRY_FILE,
+	EXFAT_DENTRY_STREAM,
+	EXFAT_DENTRY_NAME
+} exfat_dentry_clsf_t;
+
 
 typedef struct exfat_bs {