master
1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1987, 1988, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94
32 */
33
34#ifndef _SYS_DISKLABEL_H_
35#define _SYS_DISKLABEL_H_
36
37#ifndef _KERNEL
38#include <sys/types.h>
39#endif
40#include <sys/ioccom.h>
41
42#include <sys/disk/bsd.h>
43
44/* Disk description table, see disktab(5) */
45#define _PATH_DISKTAB "/etc/disktab"
46
47/*
48 * The label is in block 0 or 1, possibly offset from the beginning
49 * to leave room for a bootstrap, etc.
50 * XXX these should be defined per controller (or drive) elsewhere, not here!
51 * XXX in actuality it can't even be per controller or drive. It should be
52 * constant/fixed across storage hardware and CPU architectures. Disks can
53 * travel from one machine to another and a label created on one machine
54 * should be detectable and understood by the other.
55 */
56#define LABELSECTOR 1 /* sector containing label */
57#define LABELOFFSET 0 /* offset of label in sector */
58
59#define DISKMAGIC BSD_MAGIC /* The disk magic number */
60
61#ifndef MAXPARTITIONS
62#define MAXPARTITIONS BSD_NPARTS_MIN
63#endif
64
65/* Size of bootblock area in sector-size neutral bytes */
66#define BBSIZE BSD_BOOTBLOCK_SIZE
67
68#define LABEL_PART BSD_PART_RAW
69#define RAW_PART BSD_PART_RAW
70#define SWAP_PART BSD_PART_SWAP
71
72#define NDDATA BSD_NDRIVEDATA
73#define NSPARE BSD_NSPARE
74
75static __inline u_int16_t dkcksum(struct disklabel *lp);
76static __inline u_int16_t
77dkcksum(struct disklabel *lp)
78{
79 u_int16_t *start, *end;
80 u_int16_t sum = 0;
81
82 start = (u_int16_t *)lp;
83 end = (u_int16_t *)&lp->d_partitions[lp->d_npartitions];
84 while (start < end)
85 sum ^= *start++;
86 return (sum);
87}
88
89#ifdef DKTYPENAMES
90static const char *dktypenames[] = {
91 "unknown",
92 "SMD",
93 "MSCP",
94 "old DEC",
95 "SCSI",
96 "ESDI",
97 "ST506",
98 "HP-IB",
99 "HP-FL",
100 "type 9",
101 "floppy",
102 "CCD",
103 "Vinum",
104 "DOC2K",
105 "Raid",
106 "?",
107 "jfs",
108 NULL
109};
110#define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1)
111#endif
112
113#ifdef FSTYPENAMES
114static const char *fstypenames[] = {
115 "unused",
116 "swap",
117 "Version 6",
118 "Version 7",
119 "System V",
120 "4.1BSD",
121 "Eighth Edition",
122 "4.2BSD",
123 "MSDOS",
124 "4.4LFS",
125 "unknown",
126 "HPFS",
127 "ISO9660",
128 "boot",
129 "vinum",
130 "raid",
131 "Filecore",
132 "EXT2FS",
133 "NTFS",
134 "?",
135 "ccd",
136 "jfs",
137 "HAMMER",
138 "HAMMER2",
139 "UDF",
140 "?",
141 "EFS",
142 "ZFS",
143 "?",
144 "?",
145 "nandfs",
146 NULL
147};
148#define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1)
149#endif
150
151/*
152 * NB: <sys/disk.h> defines ioctls from 'd'/128 and up.
153 */
154
155/*
156 * Functions for proper encoding/decoding of struct disklabel into/from
157 * bytestring.
158 */
159void bsd_partition_le_dec(u_char *ptr, struct partition *d);
160int bsd_disklabel_le_dec(u_char *ptr, struct disklabel *d, int maxpart);
161void bsd_partition_le_enc(u_char *ptr, struct partition *d);
162void bsd_disklabel_le_enc(u_char *ptr, struct disklabel *d);
163
164#ifndef _KERNEL
165__BEGIN_DECLS
166struct disklabel *getdiskbyname(const char *);
167__END_DECLS
168#endif
169
170#endif /* !_SYS_DISKLABEL_H_ */