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
30#ifndef _SYS_DISK_BSD_H_
31#define _SYS_DISK_BSD_H_
32
33#include <sys/types.h>
34
35/* The disk magic number */
36#define BSD_MAGIC 0x82564557U
37
38#define BSD_NPARTS_MIN 8
39#define BSD_NPARTS_MAX 20
40
41/* Size of bootblock area in sector-size neutral bytes */
42#define BSD_BOOTBLOCK_SIZE 8192
43
44/* partition containing whole disk */
45#define BSD_PART_RAW 2
46
47/* partition normally containing swap */
48#define BSD_PART_SWAP 1
49
50/* Drive-type specific data size (in number of 32-bit inegrals) */
51#define BSD_NDRIVEDATA 5
52
53/* Number of spare 32-bit integrals following drive-type data */
54#define BSD_NSPARE 5
55
56struct disklabel {
57 uint32_t d_magic; /* the magic number */
58 uint16_t d_type; /* drive type */
59 uint16_t d_subtype; /* controller/d_type specific */
60 char d_typename[16]; /* type name, e.g. "eagle" */
61
62 char d_packname[16]; /* pack identifier */
63
64 /* disk geometry: */
65 uint32_t d_secsize; /* # of bytes per sector */
66 uint32_t d_nsectors; /* # of data sectors per track */
67 uint32_t d_ntracks; /* # of tracks per cylinder */
68 uint32_t d_ncylinders; /* # of data cylinders per unit */
69 uint32_t d_secpercyl; /* # of data sectors per cylinder */
70 uint32_t d_secperunit; /* # of data sectors per unit */
71
72 /*
73 * Spares (bad sector replacements) below are not counted in
74 * d_nsectors or d_secpercyl. Spare sectors are assumed to
75 * be physical sectors which occupy space at the end of each
76 * track and/or cylinder.
77 */
78 uint16_t d_sparespertrack; /* # of spare sectors per track */
79 uint16_t d_sparespercyl; /* # of spare sectors per cylinder */
80 /*
81 * Alternate cylinders include maintenance, replacement, configuration
82 * description areas, etc.
83 */
84 uint32_t d_acylinders; /* # of alt. cylinders per unit */
85
86 /* hardware characteristics: */
87 /*
88 * d_interleave, d_trackskew and d_cylskew describe perturbations
89 * in the media format used to compensate for a slow controller.
90 * Interleave is physical sector interleave, set up by the
91 * formatter or controller when formatting. When interleaving is
92 * in use, logically adjacent sectors are not physically
93 * contiguous, but instead are separated by some number of
94 * sectors. It is specified as the ratio of physical sectors
95 * traversed per logical sector. Thus an interleave of 1:1
96 * implies contiguous layout, while 2:1 implies that logical
97 * sector 0 is separated by one sector from logical sector 1.
98 * d_trackskew is the offset of sector 0 on track N relative to
99 * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew
100 * is the offset of sector 0 on cylinder N relative to sector 0
101 * on cylinder N-1.
102 */
103 uint16_t d_rpm; /* rotational speed */
104 uint16_t d_interleave; /* hardware sector interleave */
105 uint16_t d_trackskew; /* sector 0 skew, per track */
106 uint16_t d_cylskew; /* sector 0 skew, per cylinder */
107 uint32_t d_headswitch; /* head switch time, usec */
108 uint32_t d_trkseek; /* track-to-track seek, usec */
109 uint32_t d_flags; /* generic flags */
110 uint32_t d_drivedata[BSD_NDRIVEDATA]; /* drive-type specific data */
111 uint32_t d_spare[BSD_NSPARE]; /* reserved for future use */
112 uint32_t d_magic2; /* the magic number (again) */
113 uint16_t d_checksum; /* xor of data incl. partitions */
114
115 /* filesystem and partition information: */
116 uint16_t d_npartitions; /* number of partitions in following */
117 uint32_t d_bbsize; /* size of boot area at sn0, bytes */
118 uint32_t d_sbsize; /* max size of fs superblock, bytes */
119 struct partition { /* the partition table */
120 uint32_t p_size; /* number of sectors in partition */
121 uint32_t p_offset; /* starting sector */
122 uint32_t p_fsize; /* filesystem basic fragment size */
123 uint8_t p_fstype; /* filesystem type, see below */
124 uint8_t p_frag; /* filesystem fragments per block */
125 uint16_t p_cpg; /* filesystem cylinders per group */
126 } d_partitions[BSD_NPARTS_MIN]; /* actually may be more */
127};
128#ifdef CTASSERT
129CTASSERT(sizeof(struct disklabel) == 148 + BSD_NPARTS_MIN * 16);
130#endif
131
132/* d_type values: */
133#define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */
134#define DTYPE_MSCP 2 /* MSCP */
135#define DTYPE_DEC 3 /* other DEC (rk, rl) */
136#define DTYPE_SCSI 4 /* SCSI */
137#define DTYPE_ESDI 5 /* ESDI interface */
138#define DTYPE_ST506 6 /* ST506 etc. */
139#define DTYPE_HPIB 7 /* CS/80 on HP-IB */
140#define DTYPE_HPFL 8 /* HP Fiber-link */
141#define DTYPE_FLOPPY 10 /* floppy */
142#define DTYPE_CCD 11 /* concatenated disk */
143#define DTYPE_VINUM 12 /* vinum volume */
144#define DTYPE_DOC2K 13 /* Msys DiskOnChip */
145#define DTYPE_RAID 14 /* CMU RAIDFrame */
146#define DTYPE_JFS2 16 /* IBM JFS 2 */
147
148/*
149 * Filesystem type and version.
150 * Used to interpret other filesystem-specific
151 * per-partition information.
152 */
153#define FS_UNUSED 0 /* unused */
154#define FS_SWAP 1 /* swap */
155#define FS_V6 2 /* Sixth Edition */
156#define FS_V7 3 /* Seventh Edition */
157#define FS_SYSV 4 /* System V */
158#define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */
159#define FS_V8 6 /* Eighth Edition, 4K blocks */
160#define FS_BSDFFS 7 /* 4.2BSD fast filesystem */
161#define FS_MSDOS 8 /* MSDOS filesystem */
162#define FS_BSDLFS 9 /* 4.4BSD log-structured filesystem */
163#define FS_OTHER 10 /* in use, but unknown/unsupported */
164#define FS_HPFS 11 /* OS/2 high-performance filesystem */
165#define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */
166#define FS_BOOT 13 /* partition contains bootstrap */
167#define FS_VINUM 14 /* Vinum drive */
168#define FS_RAID 15 /* RAIDFrame drive */
169#define FS_FILECORE 16 /* Acorn Filecore Filing System */
170#define FS_EXT2FS 17 /* ext2fs */
171#define FS_NTFS 18 /* Windows/NT file system */
172#define FS_CCD 20 /* concatenated disk component */
173#define FS_JFS2 21 /* IBM JFS2 */
174#define FS_HAMMER 22 /* DragonFlyBSD Hammer FS */
175#define FS_HAMMER2 23 /* DragonFlyBSD Hammer2 FS */
176#define FS_UDF 24 /* UDF */
177#define FS_EFS 26 /* SGI's Extent File system */
178#define FS_ZFS 27 /* Sun's ZFS */
179#define FS_NANDFS 30 /* FreeBSD nandfs (NiLFS derived) */
180
181/*
182 * flags shared by various drives:
183 */
184#define D_REMOVABLE 0x01 /* removable media */
185#define D_ECC 0x02 /* supports ECC */
186#define D_BADSECT 0x04 /* supports bad sector forw. */
187#define D_RAMDISK 0x08 /* disk emulator */
188#define D_CHAIN 0x10 /* can do back-back transfers */
189
190#endif /* !_SYS_DISK_BSD_H_ */