master
1/*-
2 * Copyright (c) 1987, 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94
30 */
31
32#ifndef _SYS_DISK_BSD_H_
33#define _SYS_DISK_BSD_H_
34
35#include <sys/types.h>
36
37/* The disk magic number */
38#define BSD_MAGIC 0x82564557U
39
40#define BSD_NPARTS_MIN 8
41#define BSD_NPARTS_MAX 20
42
43/* Size of bootblock area in sector-size neutral bytes */
44#define BSD_BOOTBLOCK_SIZE 8192
45
46/* partition containing whole disk */
47#define BSD_PART_RAW 2
48
49/* partition normally containing swap */
50#define BSD_PART_SWAP 1
51
52/* Drive-type specific data size (in number of 32-bit inegrals) */
53#define BSD_NDRIVEDATA 5
54
55/* Number of spare 32-bit integrals following drive-type data */
56#define BSD_NSPARE 5
57
58struct disklabel {
59 uint32_t d_magic; /* the magic number */
60 uint16_t d_type; /* drive type */
61 uint16_t d_subtype; /* controller/d_type specific */
62 char d_typename[16]; /* type name, e.g. "eagle" */
63
64 char d_packname[16]; /* pack identifier */
65
66 /* disk geometry: */
67 uint32_t d_secsize; /* # of bytes per sector */
68 uint32_t d_nsectors; /* # of data sectors per track */
69 uint32_t d_ntracks; /* # of tracks per cylinder */
70 uint32_t d_ncylinders; /* # of data cylinders per unit */
71 uint32_t d_secpercyl; /* # of data sectors per cylinder */
72 uint32_t d_secperunit; /* # of data sectors per unit */
73
74 /*
75 * Spares (bad sector replacements) below are not counted in
76 * d_nsectors or d_secpercyl. Spare sectors are assumed to
77 * be physical sectors which occupy space at the end of each
78 * track and/or cylinder.
79 */
80 uint16_t d_sparespertrack; /* # of spare sectors per track */
81 uint16_t d_sparespercyl; /* # of spare sectors per cylinder */
82 /*
83 * Alternate cylinders include maintenance, replacement, configuration
84 * description areas, etc.
85 */
86 uint32_t d_acylinders; /* # of alt. cylinders per unit */
87
88 /* hardware characteristics: */
89 /*
90 * d_interleave, d_trackskew and d_cylskew describe perturbations
91 * in the media format used to compensate for a slow controller.
92 * Interleave is physical sector interleave, set up by the
93 * formatter or controller when formatting. When interleaving is
94 * in use, logically adjacent sectors are not physically
95 * contiguous, but instead are separated by some number of
96 * sectors. It is specified as the ratio of physical sectors
97 * traversed per logical sector. Thus an interleave of 1:1
98 * implies contiguous layout, while 2:1 implies that logical
99 * sector 0 is separated by one sector from logical sector 1.
100 * d_trackskew is the offset of sector 0 on track N relative to
101 * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew
102 * is the offset of sector 0 on cylinder N relative to sector 0
103 * on cylinder N-1.
104 */
105 uint16_t d_rpm; /* rotational speed */
106 uint16_t d_interleave; /* hardware sector interleave */
107 uint16_t d_trackskew; /* sector 0 skew, per track */
108 uint16_t d_cylskew; /* sector 0 skew, per cylinder */
109 uint32_t d_headswitch; /* head switch time, usec */
110 uint32_t d_trkseek; /* track-to-track seek, usec */
111 uint32_t d_flags; /* generic flags */
112 uint32_t d_drivedata[BSD_NDRIVEDATA]; /* drive-type specific data */
113 uint32_t d_spare[BSD_NSPARE]; /* reserved for future use */
114 uint32_t d_magic2; /* the magic number (again) */
115 uint16_t d_checksum; /* xor of data incl. partitions */
116
117 /* filesystem and partition information: */
118 uint16_t d_npartitions; /* number of partitions in following */
119 uint32_t d_bbsize; /* size of boot area at sn0, bytes */
120 uint32_t d_sbsize; /* max size of fs superblock, bytes */
121 struct partition { /* the partition table */
122 uint32_t p_size; /* number of sectors in partition */
123 uint32_t p_offset; /* starting sector */
124 uint32_t p_fsize; /* filesystem basic fragment size */
125 uint8_t p_fstype; /* filesystem type, see below */
126 uint8_t p_frag; /* filesystem fragments per block */
127 uint16_t p_cpg; /* filesystem cylinders per group */
128 } d_partitions[BSD_NPARTS_MIN]; /* actually may be more */
129};
130#ifdef CTASSERT
131CTASSERT(sizeof(struct disklabel) == 148 + BSD_NPARTS_MIN * 16);
132#endif
133
134/* d_type values: */
135#define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */
136#define DTYPE_MSCP 2 /* MSCP */
137#define DTYPE_DEC 3 /* other DEC (rk, rl) */
138#define DTYPE_SCSI 4 /* SCSI */
139#define DTYPE_ESDI 5 /* ESDI interface */
140#define DTYPE_ST506 6 /* ST506 etc. */
141#define DTYPE_HPIB 7 /* CS/80 on HP-IB */
142#define DTYPE_HPFL 8 /* HP Fiber-link */
143#define DTYPE_FLOPPY 10 /* floppy */
144#define DTYPE_CCD 11 /* concatenated disk */
145#define DTYPE_VINUM 12 /* vinum volume */
146#define DTYPE_DOC2K 13 /* Msys DiskOnChip */
147#define DTYPE_RAID 14 /* CMU RAIDFrame */
148#define DTYPE_JFS2 16 /* IBM JFS 2 */
149
150/*
151 * Filesystem type and version.
152 * Used to interpret other filesystem-specific
153 * per-partition information.
154 */
155#define FS_UNUSED 0 /* unused */
156#define FS_SWAP 1 /* swap */
157#define FS_V6 2 /* Sixth Edition */
158#define FS_V7 3 /* Seventh Edition */
159#define FS_SYSV 4 /* System V */
160#define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */
161#define FS_V8 6 /* Eighth Edition, 4K blocks */
162#define FS_BSDFFS 7 /* 4.2BSD fast filesystem */
163#define FS_MSDOS 8 /* MSDOS filesystem */
164#define FS_BSDLFS 9 /* 4.4BSD log-structured filesystem */
165#define FS_OTHER 10 /* in use, but unknown/unsupported */
166#define FS_HPFS 11 /* OS/2 high-performance filesystem */
167#define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */
168#define FS_BOOT 13 /* partition contains bootstrap */
169#define FS_VINUM 14 /* Vinum drive */
170#define FS_RAID 15 /* RAIDFrame drive */
171#define FS_FILECORE 16 /* Acorn Filecore Filing System */
172#define FS_EXT2FS 17 /* ext2fs */
173#define FS_NTFS 18 /* Windows/NT file system */
174#define FS_CCD 20 /* concatenated disk component */
175#define FS_JFS2 21 /* IBM JFS2 */
176#define FS_HAMMER 22 /* DragonFlyBSD Hammer FS */
177#define FS_HAMMER2 23 /* DragonFlyBSD Hammer2 FS */
178#define FS_UDF 24 /* UDF */
179#define FS_EFS 26 /* SGI's Extent File system */
180#define FS_ZFS 27 /* Sun's ZFS */
181#define FS_NANDFS 30 /* FreeBSD nandfs (NiLFS derived) */
182
183/*
184 * flags shared by various drives:
185 */
186#define D_REMOVABLE 0x01 /* removable media */
187#define D_ECC 0x02 /* supports ECC */
188#define D_BADSECT 0x04 /* supports bad sector forw. */
189#define D_RAMDISK 0x08 /* disk emulator */
190#define D_CHAIN 0x10 /* can do back-back transfers */
191
192#endif /* !_SYS_DISK_BSD_H_ */