[apple/boot.git] / i386 / libsaio / ntfs_private.h

/*
 * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*	$NetBSD: ntfs.h,v 1.9 1999/10/31 19:45:26 jdolecek Exp $	*/

/*-
 * Copyright (c) 1998, 1999 Semen Ustimenko
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: src/sys/fs/ntfs/ntfs.h,v 1.14 2001/11/27 00:18:33 jhb Exp $
 */

/*#define NTFS_DEBUG 1*/

#ifdef APPLE
/* We're using FreeBSD style byte order macros in the source. */
#include <libkern/OSByteOrder.h>
#define le16toh(x)		OSSwapLittleToHostInt16(x)
#define le32toh(x)		OSSwapLittleToHostInt32(x)
#define le64toh(x)		OSSwapLittleToHostInt64(x)

/* FreeBSD mutexes correspond to Darwin's simple locks */
#define mtx_lock(lock)		simple_lock(lock)
#define mtx_unlock(lock)	simple_unlock(lock)
#define mtx_destroy(lock)	/* Nothing. */

#define lockdestroy(lock)	/* Nothing. */

#endif

typedef u_int64_t cn_t;
typedef u_int16_t wchar;

#pragma pack(1)
#define BBSIZE			1024
#define	BBOFF			((off_t)(0))
#define	BBLOCK			((daddr_t)(0))
#define	NTFS_MFTINO		0
#define	NTFS_VOLUMEINO		3
#define	NTFS_ATTRDEFINO		4
#define	NTFS_ROOTINO		5
#define	NTFS_BITMAPINO		6
#define	NTFS_BOOTINO		7
#define	NTFS_BADCLUSINO		8
#define	NTFS_UPCASEINO		10
#define NTFS_MAXFILENAME	255

struct fixuphdr {
	u_int32_t       fh_magic;
	u_int16_t       fh_foff;
	u_int16_t       fh_fnum;
};

#define NTFS_AF_INRUN	0x00000001
struct attrhdr {
	u_int32_t       a_type;
	u_int32_t       reclen;
	u_int8_t        a_flag;
	u_int8_t        a_namelen;
	u_int8_t        a_nameoff;
	u_int8_t        reserved1;
	u_int8_t        a_compression;
	u_int8_t        reserved2;
	u_int16_t       a_index;
};
#define NTFS_A_STD	0x10
#define NTFS_A_ATTRLIST	0x20
#define NTFS_A_NAME	0x30
#define NTFS_A_VOLUMENAME	0x60
#define NTFS_A_DATA	0x80
#define	NTFS_A_INDXROOT	0x90
#define	NTFS_A_INDX	0xA0
#define NTFS_A_INDXBITMAP 0xB0

#define NTFS_MAXATTRNAME	255
struct attr {
	struct attrhdr  a_hdr;
	union {
		struct {
			u_int16_t       a_datalen;
			u_int16_t       reserved1;
			u_int16_t       a_dataoff;
			u_int16_t       a_indexed;
		}               a_S_r;
		struct {
			cn_t            a_vcnstart;
			cn_t            a_vcnend;
			u_int16_t       a_dataoff;
			u_int16_t       a_compressalg;
			u_int32_t       reserved1;
			u_int64_t       a_allocated;
			u_int64_t       a_datalen;
			u_int64_t       a_initialized;
		}               a_S_nr;
	}               a_S;
};
#define a_r	a_S.a_S_r
#define a_nr	a_S.a_S_nr

typedef struct {
	u_int64_t       t_create;
	u_int64_t       t_write;
	u_int64_t       t_mftwrite;
	u_int64_t       t_access;
}               ntfs_times_t;

#define NTFS_FFLAG_RDONLY	0x01LL
#define NTFS_FFLAG_HIDDEN	0x02LL
#define NTFS_FFLAG_SYSTEM	0x04LL
#define NTFS_FFLAG_ARCHIVE	0x20LL
#define NTFS_FFLAG_COMPRESSED	0x0800LL
#define NTFS_FFLAG_DIR		0x10000000LL

struct attr_name {
	u_int32_t	n_pnumber;	/* Parent ntnode */
	u_int32_t       reserved;
	ntfs_times_t    n_times;
	u_int64_t       n_size;
	u_int64_t       n_attrsz;
	u_int64_t       n_flag;
	u_int8_t        n_namelen;
	u_int8_t        n_nametype;
	u_int16_t       n_name[1];
};

#define NTFS_IRFLAG_INDXALLOC	0x00000001
struct attr_indexroot {
	u_int32_t       ir_unkn1;	/* attribute type (0x30 for $FILE_NAME) */
	u_int32_t       ir_unkn2;	/* collation rule (0x01 for file names) */
	u_int32_t       ir_size;	/* size of index allocation entry */
	u_int32_t       ir_unkn3;	/* clusters per index record, and 3 bytes padding */
	u_int32_t       ir_unkn4;	/* (offset to first index entry?) always 0x10 */
	u_int32_t       ir_datalen;	/* (total size of index enties?) sizeof something */
	u_int32_t       ir_allocated;	/* (allocated size of index entries?) */
	u_int8_t       	ir_flag;	/* 1=index allocation needed (large index) */
        u_int8_t	ir_pad1;	/* padding */
	u_int16_t       ir_pad2;	/* padding */
};

struct attr_attrlist {
	u_int32_t       al_type;	/* Attribute type */
	u_int16_t       reclen;		/* length of this entry */
	u_int8_t        al_namelen;	/* Attribute name len */
	u_int8_t        al_nameoff;	/* Name offset from entry start */
	u_int64_t       al_vcnstart;	/* VCN number */
	u_int32_t       al_inumber;	/* Parent ntnode */
	u_int32_t       reserved;
	u_int16_t       al_index;	/* Attribute index in MFT record */
	u_int16_t       al_name[1];	/* Name */
};

#define	NTFS_INDXMAGIC	(u_int32_t)(0x58444E49)
struct attr_indexalloc {
	struct fixuphdr ia_fixup;
	u_int64_t       unknown1;
	cn_t            ia_bufcn;
	u_int16_t       ia_hdrsize;
	u_int16_t       unknown2;
	u_int32_t       ia_inuse;
	u_int32_t       ia_allocated;
};

#define	NTFS_IEFLAG_SUBNODE	0x00000001
#define	NTFS_IEFLAG_LAST	0x00000002

struct attr_indexentry {
	u_int32_t       ie_number;
	u_int32_t       unknown1;
	u_int16_t       reclen;
	u_int16_t       ie_size;
	u_int32_t       ie_flag;/* 1 - has subnodes, 2 - last */
	u_int32_t       ie_fpnumber;
	u_int32_t       unknown2;
	ntfs_times_t    ie_ftimes;
	u_int64_t       ie_fallocated;
	u_int64_t       ie_fsize;
	u_int32_t       ie_fflag;
        u_int32_t	unknown3;	/* used by reparse points and external attributes? */
	u_int8_t        ie_fnamelen;
	u_int8_t        ie_fnametype;
	wchar           ie_fname[NTFS_MAXFILENAME];
	/* cn_t		ie_bufcn;	 buffer with subnodes */
};

#define	NTFS_FILEMAGIC	(u_int32_t)(0x454C4946)
#define	NTFS_FRFLAG_DIR	0x0002
struct filerec {
	struct fixuphdr fr_fixup;
	u_int8_t        reserved[8];
	u_int16_t       fr_seqnum;	/* Sequence number */
	u_int16_t       fr_nlink;
	u_int16_t       fr_attroff;	/* offset to attributes */
	u_int16_t       fr_flags;	/* 1-nonresident attr, 2-directory */
	u_int32_t       fr_size;/* hdr + attributes */
	u_int32_t       fr_allocated;	/* allocated length of record */
	u_int64_t       fr_mainrec;	/* main record */
	u_int16_t       fr_attrnum;	/* maximum attr number + 1 ??? */
};

#define	NTFS_ATTRNAME_MAXLEN	0x40
#define	NTFS_ADFLAG_NONRES	0x0080	/* Attrib can be non resident */
#define	NTFS_ADFLAG_INDEX	0x0002	/* Attrib can be indexed */
struct attrdef {
	wchar		ad_name[NTFS_ATTRNAME_MAXLEN];
	u_int32_t	ad_type;
	u_int32_t	reserved1[2];
	u_int32_t	ad_flag;
	u_int64_t	ad_minlen;
	u_int64_t	ad_maxlen;	/* -1 for nonlimited */
};

struct ntvattrdef {
	char		ad_name[0x40];
	int		ad_namelen;
	u_int32_t	ad_type;
};

#define	NTFS_BBID	"NTFS    "
#define	NTFS_BBIDLEN	8
struct bootfile {
	u_int8_t        reserved1[3];	/* asm jmp near ... */
	u_int8_t        bf_sysid[8];	/* 'NTFS    ' */
	u_int16_t       bf_bps;		/* bytes per sector */
	u_int8_t        bf_spc;		/* sectors per cluster */
	u_int8_t        reserved2[7];	/* unused (zeroed) */
	u_int8_t        bf_media;	/* media desc. (0xF8) */
	u_int8_t        reserved3[2];
	u_int16_t       bf_spt;		/* sectors per track */
	u_int16_t       bf_heads;	/* number of heads */
	u_int8_t        reserver4[12];
	u_int64_t       bf_spv;		/* sectors per volume */
	cn_t            bf_mftcn;	/* $MFT cluster number */
	cn_t            bf_mftmirrcn;	/* $MFTMirr cn */
	u_int8_t        bf_mftrecsz;	/* MFT record size (clust) */
					/* 0xF6 inducates 1/4 */
	u_int32_t       bf_ibsz;	/* index buffer size */
	u_int32_t       bf_volsn;	/* volume ser. num. */
};

/*
 * Darwin's ntfs.util needs to include this file to get definitions
 * for the on-disk structures.  It doesn't need the ntfsmount structure.
 * In fact, since it doesn't #define KERNEL, the struct netexport below
 * won't be defined.
 *
 * So, I'm using #ifdef KERNEL around the things that are only relevant
 * to the in-kernel implementation.
 *
Commit	Line	Data
57c72a9a A	1	/*
	2	* Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
	7	*
	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/* $NetBSD: ntfs.h,v 1.9 1999/10/31 19:45:26 jdolecek Exp $ */
	26
	27	/*-
	28	* Copyright (c) 1998, 1999 Semen Ustimenko
	29	* All rights reserved.
	30	*
	31	* Redistribution and use in source and binary forms, with or without
	32	* modification, are permitted provided that the following conditions
	33	* are met:
	34	* 1. Redistributions of source code must retain the above copyright
	35	* notice, this list of conditions and the following disclaimer.
	36	* 2. Redistributions in binary form must reproduce the above copyright
	37	* notice, this list of conditions and the following disclaimer in the
	38	* documentation and/or other materials provided with the distribution.
	39	*
	40	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	41	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	42	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	43	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	44	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	45	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	46	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	47	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	48	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	49	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	50	* SUCH DAMAGE.
	51	*
	52	* $FreeBSD: src/sys/fs/ntfs/ntfs.h,v 1.14 2001/11/27 00:18:33 jhb Exp $
	53	*/
	54
	55	/#define NTFS_DEBUG 1/
	56
	57	#ifdef APPLE
	58	/* We're using FreeBSD style byte order macros in the source. */
	59	#include <libkern/OSByteOrder.h>
	60	#define le16toh(x) OSSwapLittleToHostInt16(x)
	61	#define le32toh(x) OSSwapLittleToHostInt32(x)
	62	#define le64toh(x) OSSwapLittleToHostInt64(x)
	63
	64	/* FreeBSD mutexes correspond to Darwin's simple locks */
65	#define mtx_lock(lock) simple_lock(lock)
66	#define mtx_unlock(lock) simple_unlock(lock)
67	#define mtx_destroy(lock) /* Nothing. */
68
69	#define lockdestroy(lock) /* Nothing. */
70
71	#endif
72
73	typedef u_int64_t cn_t;
74	typedef u_int16_t wchar;
75
76	#pragma pack(1)
77	#define BBSIZE 1024
78	#define BBOFF ((off_t)(0))
79	#define BBLOCK ((daddr_t)(0))
80	#define NTFS_MFTINO 0
81	#define NTFS_VOLUMEINO 3
82	#define NTFS_ATTRDEFINO 4
83	#define NTFS_ROOTINO 5
84	#define NTFS_BITMAPINO 6
85	#define NTFS_BOOTINO 7
86	#define NTFS_BADCLUSINO 8
87	#define NTFS_UPCASEINO 10
88	#define NTFS_MAXFILENAME 255
89
90	struct fixuphdr {
91	u_int32_t fh_magic;
92	u_int16_t fh_foff;
93	u_int16_t fh_fnum;
94	};
95
96	#define NTFS_AF_INRUN 0x00000001
97	struct attrhdr {
98	u_int32_t a_type;
99	u_int32_t reclen;
100	u_int8_t a_flag;
101	u_int8_t a_namelen;
102	u_int8_t a_nameoff;
103	u_int8_t reserved1;
104	u_int8_t a_compression;
105	u_int8_t reserved2;
106	u_int16_t a_index;
107	};
108	#define NTFS_A_STD 0x10
109	#define NTFS_A_ATTRLIST 0x20
110	#define NTFS_A_NAME 0x30
111	#define NTFS_A_VOLUMENAME 0x60
112	#define NTFS_A_DATA 0x80
113	#define NTFS_A_INDXROOT 0x90
114	#define NTFS_A_INDX 0xA0
115	#define NTFS_A_INDXBITMAP 0xB0
116
117	#define NTFS_MAXATTRNAME 255
118	struct attr {
119	struct attrhdr a_hdr;
120	union {
121	struct {
122	u_int16_t a_datalen;
123	u_int16_t reserved1;
124	u_int16_t a_dataoff;
125	u_int16_t a_indexed;
126	} a_S_r;
127	struct {
128	cn_t a_vcnstart;
129	cn_t a_vcnend;
130	u_int16_t a_dataoff;
131	u_int16_t a_compressalg;
132	u_int32_t reserved1;
133	u_int64_t a_allocated;
134	u_int64_t a_datalen;
135	u_int64_t a_initialized;
136	} a_S_nr;
137	} a_S;
138	};
139	#define a_r a_S.a_S_r
140	#define a_nr a_S.a_S_nr
141
142	typedef struct {
143	u_int64_t t_create;
144	u_int64_t t_write;
145	u_int64_t t_mftwrite;
146	u_int64_t t_access;
147	} ntfs_times_t;
148
149	#define NTFS_FFLAG_RDONLY 0x01LL
150	#define NTFS_FFLAG_HIDDEN 0x02LL
151	#define NTFS_FFLAG_SYSTEM 0x04LL
152	#define NTFS_FFLAG_ARCHIVE 0x20LL
153	#define NTFS_FFLAG_COMPRESSED 0x0800LL
154	#define NTFS_FFLAG_DIR 0x10000000LL
155
156	struct attr_name {
157	u_int32_t n_pnumber; /* Parent ntnode */
158	u_int32_t reserved;
159	ntfs_times_t n_times;
160	u_int64_t n_size;
161	u_int64_t n_attrsz;
162	u_int64_t n_flag;
163	u_int8_t n_namelen;
164	u_int8_t n_nametype;
165	u_int16_t n_name[1];
166	};
167
168	#define NTFS_IRFLAG_INDXALLOC 0x00000001
169	struct attr_indexroot {
170	u_int32_t ir_unkn1; /* attribute type (0x30 for $FILE_NAME) */
171	u_int32_t ir_unkn2; /* collation rule (0x01 for file names) */
172	u_int32_t ir_size; /* size of index allocation entry */
173	u_int32_t ir_unkn3; /* clusters per index record, and 3 bytes padding */
174	u_int32_t ir_unkn4; /* (offset to first index entry?) always 0x10 */
175	u_int32_t ir_datalen; /* (total size of index enties?) sizeof something */
176	u_int32_t ir_allocated; /* (allocated size of index entries?) */
177	u_int8_t ir_flag; /* 1=index allocation needed (large index) */
178	u_int8_t ir_pad1; /* padding */
179	u_int16_t ir_pad2; /* padding */
180	};
181
182	struct attr_attrlist {
183	u_int32_t al_type; /* Attribute type */
184	u_int16_t reclen; /* length of this entry */
185	u_int8_t al_namelen; /* Attribute name len */
186	u_int8_t al_nameoff; /* Name offset from entry start */
187	u_int64_t al_vcnstart; /* VCN number */
188	u_int32_t al_inumber; /* Parent ntnode */
189	u_int32_t reserved;
190	u_int16_t al_index; /* Attribute index in MFT record */
191	u_int16_t al_name[1]; /* Name */
192	};
193
194	#define NTFS_INDXMAGIC (u_int32_t)(0x58444E49)
195	struct attr_indexalloc {
196	struct fixuphdr ia_fixup;
197	u_int64_t unknown1;
198	cn_t ia_bufcn;
199	u_int16_t ia_hdrsize;
200	u_int16_t unknown2;
201	u_int32_t ia_inuse;
202	u_int32_t ia_allocated;
203	};
204
205	#define NTFS_IEFLAG_SUBNODE 0x00000001
206	#define NTFS_IEFLAG_LAST 0x00000002
207
208	struct attr_indexentry {
209	u_int32_t ie_number;
210	u_int32_t unknown1;
211	u_int16_t reclen;
212	u_int16_t ie_size;
213	u_int32_t ie_flag;/* 1 - has subnodes, 2 - last */
214	u_int32_t ie_fpnumber;
215	u_int32_t unknown2;
216	ntfs_times_t ie_ftimes;
217	u_int64_t ie_fallocated;
218	u_int64_t ie_fsize;
219	u_int32_t ie_fflag;
220	u_int32_t unknown3; /* used by reparse points and external attributes? */
221	u_int8_t ie_fnamelen;
222	u_int8_t ie_fnametype;
223	wchar ie_fname[NTFS_MAXFILENAME];
224	/* cn_t ie_bufcn; buffer with subnodes */
225	};
226
227	#define NTFS_FILEMAGIC (u_int32_t)(0x454C4946)
228	#define NTFS_FRFLAG_DIR 0x0002
229	struct filerec {
230	struct fixuphdr fr_fixup;
231	u_int8_t reserved[8];
232	u_int16_t fr_seqnum; /* Sequence number */
233	u_int16_t fr_nlink;
234	u_int16_t fr_attroff; /* offset to attributes */
235	u_int16_t fr_flags; /* 1-nonresident attr, 2-directory */
236	u_int32_t fr_size;/* hdr + attributes */
237	u_int32_t fr_allocated; /* allocated length of record */
238	u_int64_t fr_mainrec; /* main record */
239	u_int16_t fr_attrnum; /* maximum attr number + 1 ??? */
240	};
241
242	#define NTFS_ATTRNAME_MAXLEN 0x40
243	#define NTFS_ADFLAG_NONRES 0x0080 /* Attrib can be non resident */
244	#define NTFS_ADFLAG_INDEX 0x0002 /* Attrib can be indexed */
245	struct attrdef {
246	wchar ad_name[NTFS_ATTRNAME_MAXLEN];
247	u_int32_t ad_type;
248	u_int32_t reserved1[2];
249	u_int32_t ad_flag;
250	u_int64_t ad_minlen;
251	u_int64_t ad_maxlen; /* -1 for nonlimited */
252	};
253
254	struct ntvattrdef {
255	char ad_name[0x40];
256	int ad_namelen;
257	u_int32_t ad_type;
258	};
259
260	#define NTFS_BBID "NTFS "
261	#define NTFS_BBIDLEN 8
262	struct bootfile {
263	u_int8_t reserved1[3]; /* asm jmp near ... */
264	u_int8_t bf_sysid[8]; /* 'NTFS ' */
265	u_int16_t bf_bps; /* bytes per sector */
266	u_int8_t bf_spc; /* sectors per cluster */
267	u_int8_t reserved2[7]; /* unused (zeroed) */
268	u_int8_t bf_media; /* media desc. (0xF8) */
269	u_int8_t reserved3[2];
270	u_int16_t bf_spt; /* sectors per track */
271	u_int16_t bf_heads; /* number of heads */
272	u_int8_t reserver4[12];
273	u_int64_t bf_spv; /* sectors per volume */
274	cn_t bf_mftcn; /* $MFT cluster number */
275	cn_t bf_mftmirrcn; /* $MFTMirr cn */
276	u_int8_t bf_mftrecsz; /* MFT record size (clust) */
277	/* 0xF6 inducates 1/4 */
278	u_int32_t bf_ibsz; /* index buffer size */
279	u_int32_t bf_volsn; /* volume ser. num. */
280	};
281
282	/*
283	* Darwin's ntfs.util needs to include this file to get definitions
284	* for the on-disk structures. It doesn't need the ntfsmount structure.
285	* In fact, since it doesn't #define KERNEL, the struct netexport below
286	* won't be defined.
287	*
288	* So, I'm using #ifdef KERNEL around the things that are only relevant
289	* to the in-kernel implementation.
290	*
291