1/*-
2 * Copyright (c) 2008 Marcel Moolenaar
3 * 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 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#ifndef _SYS_VTOC_H_
30#define	_SYS_VTOC_H_
31
32#define	VTOC_TAG_UNASSIGNED	0x00
33#define	VTOC_TAG_BOOT		0x01
34#define	VTOC_TAG_ROOT		0x02
35#define	VTOC_TAG_SWAP		0x03
36#define	VTOC_TAG_USR		0x04
37#define	VTOC_TAG_BACKUP		0x05	/* "c" partition */
38#define	VTOC_TAG_STAND		0x06
39#define	VTOC_TAG_VAR		0x07
40#define	VTOC_TAG_HOME		0x08
41#define	VTOC_TAG_ALTSCTR	0x09	/* alternate sector partition */
42#define	VTOC_TAG_CACHE		0x0a	/* Solaris cachefs partition */
43#define	VTOC_TAG_VXVM_PUB	0x0e	/* VxVM public region */
44#define	VTOC_TAG_VXVM_PRIV	0x0f	/* VxVM private region */
45
46/* NetBSD/mips defines this */
47#define	VTOC_TAG_NETBSD_FFS	0xff
48
49/* FreeBSD tags: the high byte equals ELFOSABI_FREEBSD */
50#define	VTOC_TAG_FREEBSD_SWAP	0x0901
51#define	VTOC_TAG_FREEBSD_UFS	0x0902
52#define	VTOC_TAG_FREEBSD_VINUM	0x0903
53#define	VTOC_TAG_FREEBSD_ZFS	0x0904
54#define	VTOC_TAG_FREEBSD_NANDFS	0x0905
55
56#define	VTOC_FLAG_UNMNT		0x01	/* unmountable partition */
57#define	VTOC_FLAG_RDONLY	0x10    /* partition is read/only */
58
59#define	VTOC_ASCII_LEN	128
60#define	VTOC_BOOTSIZE	8192		/* 16 sectors */
61#define	VTOC_MAGIC	0xdabe
62#define	VTOC_RAW_PART	2
63#define	VTOC_SANITY	0x600ddeee
64#define	VTOC_VERSION	1
65#define	VTOC_VOLUME_LEN	8
66
67#define	VTOC8_NPARTS	8
68
69struct vtoc8 {
70	char		ascii[VTOC_ASCII_LEN];
71	uint32_t	version;
72	char		volume[VTOC_VOLUME_LEN];
73	uint16_t	nparts;
74	struct {
75		uint16_t	tag;
76		uint16_t	flag;
77	} part[VTOC8_NPARTS] __packed;
78	uint16_t	__alignment;
79	uint32_t	bootinfo[3];
80	uint32_t	sanity;
81	uint32_t	reserved[10];
82	uint32_t	timestamp[VTOC8_NPARTS];
83	uint16_t	wskip;
84	uint16_t	rskip;
85	char		padding[152];
86	uint16_t	rpm;
87	uint16_t	physcyls;
88	uint16_t	sparesecs;
89	uint16_t	spare1[2];
90	uint16_t	interleave;
91	uint16_t	ncyls;
92	uint16_t	altcyls;
93	uint16_t	nheads;
94	uint16_t	nsecs;
95	uint16_t	spare2[2];
96	struct {
97		uint32_t	cyl;
98		uint32_t	nblks;
99	} map[VTOC8_NPARTS];
100	uint16_t	magic;
101	uint16_t	cksum;
102} __packed;
103
104#ifdef CTASSERT
105CTASSERT(sizeof(struct vtoc8) == 512);
106#endif
107
108#define NDKMAP          16              /* # of logical partitions */
109#define DK_LABEL_LOC    1               /* location of disk label */
110#define LEN_DKL_ASCII   128             /* length of dkl_asciilabel */
111#define LEN_DKL_VVOL    8               /* length of v_volume */
112#define DK_LABEL_SIZE   512             /* size of disk label */
113#define DK_MAX_BLOCKS   0x7fffffff      /* max # of blocks handled */
114
115struct dk_vtoc {
116	uint32_t	v_bootinfo[3];	/* info needed by mboot (unsupported) */
117	uint32_t	v_sanity;	/* to verify vtoc sanity */
118	uint32_t	v_version;	/* layout version */
119	char	v_volume[LEN_DKL_VVOL];	/* volume name */
120	uint16_t	v_sectorsz;	/* sector size in bytes */
121	uint16_t	v_nparts;	/* number of partitions */
122	uint32_t	v_reserved[10];	/* free space */
123	struct {
124		uint16_t	p_tag;	/* ID tag of partition */
125		uint16_t	p_flag;	/* permission flags */
126		uint32_t	p_start;/* start sector no of partition */
127		int32_t		p_size;	/* # of blocks in partition */
128	} v_part[NDKMAP];		/* partition headers */
129	uint32_t timestamp[NDKMAP];	/* partition timestamp (unsupported) */
130	char	v_asciilabel[LEN_DKL_ASCII];	/* for compatibility */
131};
132
133#define	LEN_DKL_PAD	(DK_LABEL_SIZE - \
134			    ((sizeof (struct dk_vtoc) + \
135			    (4 * sizeof (uint32_t)) + \
136			    (12 * sizeof (uint16_t)) + \
137			    (2 * (sizeof (uint16_t))))))
138
139struct dk_label {
140        struct  dk_vtoc dkl_vtoc;       /* vtoc inclusions from AT&T SVr4 */
141        uint32_t        dkl_pcyl;       /* # of physical cylinders */
142        uint32_t        dkl_ncyl;       /* # of data cylinders */
143        uint16_t        dkl_acyl;       /* # of alternate cylinders */
144        uint16_t        dkl_bcyl;       /* cyl offset (for fixed head area) */
145        uint32_t        dkl_nhead;      /* # of heads */
146        uint32_t        dkl_nsect;      /* # of data sectors per track */
147        uint16_t        dkl_intrlv;     /* interleave factor */
148        uint16_t        dkl_skew;       /* skew factor */
149        uint16_t        dkl_apc;        /* alternates per cyl (SCSI only)   */
150        uint16_t        dkl_rpm;        /* revolutions per minute */
151        uint16_t        dkl_write_reinstruct;   /* # sectors to skip, writes */
152        uint16_t        dkl_read_reinstruct;    /* # sectors to skip, reads  */
153        uint16_t        dkl_extra[4];   /* for compatible expansion */
154        char            dkl_pad[LEN_DKL_PAD];   /* unused part of 512 bytes */
155        uint16_t        dkl_magic;      /* identifies this label format */
156        uint16_t        dkl_cksum;      /* xor checksum of sector */
157};
158
159#ifdef CTASSERT
160CTASSERT(sizeof(struct dk_label) == 512);
161#endif
162
163#endif /* _SYS_VTOC_H_ */
164