vtoc.h revision 199767f8919635c4928607450d9e0abb932109ce
/*-
* Copyright (c) 2008 Marcel Moolenaar
* 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 ``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 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.
*
* $FreeBSD$
*/
#ifndef _SYS_VTOC_H_
#define _SYS_VTOC_H_
#define VTOC_TAG_UNASSIGNED 0x00
#define VTOC_TAG_BOOT 0x01
#define VTOC_TAG_ROOT 0x02
#define VTOC_TAG_SWAP 0x03
#define VTOC_TAG_USR 0x04
#define VTOC_TAG_BACKUP 0x05 /* "c" partition */
#define VTOC_TAG_STAND 0x06
#define VTOC_TAG_VAR 0x07
#define VTOC_TAG_HOME 0x08
#define VTOC_TAG_ALTSCTR 0x09 /* alternate sector partition */
#define VTOC_TAG_CACHE 0x0a /* Solaris cachefs partition */
#define VTOC_TAG_VXVM_PUB 0x0e /* VxVM public region */
#define VTOC_TAG_VXVM_PRIV 0x0f /* VxVM private region */
/* NetBSD/mips defines this */
#define VTOC_TAG_NETBSD_FFS 0xff
/* FreeBSD tags: the high byte equals ELFOSABI_FREEBSD */
#define VTOC_TAG_FREEBSD_SWAP 0x0901
#define VTOC_TAG_FREEBSD_UFS 0x0902
#define VTOC_TAG_FREEBSD_VINUM 0x0903
#define VTOC_TAG_FREEBSD_ZFS 0x0904
#define VTOC_TAG_FREEBSD_NANDFS 0x0905
#define VTOC_FLAG_UNMNT 0x01 /* unmountable partition */
#define VTOC_FLAG_RDONLY 0x10 /* partition is read/only */
#define VTOC_ASCII_LEN 128
#define VTOC_BOOTSIZE 8192 /* 16 sectors */
#define VTOC_MAGIC 0xdabe
#define VTOC_RAW_PART 2
#define VTOC_SANITY 0x600ddeee
#define VTOC_VERSION 1
#define VTOC_VOLUME_LEN 8
#define VTOC8_NPARTS 8
struct vtoc8 {
char ascii[VTOC_ASCII_LEN];
uint32_t version;
char volume[VTOC_VOLUME_LEN];
uint16_t nparts;
struct {
uint16_t tag;
uint16_t flag;
} part[VTOC8_NPARTS] __packed;
uint16_t __alignment;
uint32_t bootinfo[3];
uint32_t sanity;
uint32_t reserved[10];
uint32_t timestamp[VTOC8_NPARTS];
uint16_t wskip;
uint16_t rskip;
char padding[152];
uint16_t rpm;
uint16_t physcyls;
uint16_t sparesecs;
uint16_t spare1[2];
uint16_t interleave;
uint16_t ncyls;
uint16_t altcyls;
uint16_t nheads;
uint16_t nsecs;
uint16_t spare2[2];
struct {
uint32_t cyl;
uint32_t nblks;
} map[VTOC8_NPARTS];
uint16_t magic;
uint16_t cksum;
} __packed;
#ifdef CTASSERT
CTASSERT(sizeof(struct vtoc8) == 512);
#endif
#define NDKMAP 16 /* # of logical partitions */
#define DK_LABEL_LOC 1 /* location of disk label */
#define LEN_DKL_ASCII 128 /* length of dkl_asciilabel */
#define LEN_DKL_VVOL 8 /* length of v_volume */
#define DK_LABEL_SIZE 512 /* size of disk label */
#define DK_MAX_BLOCKS 0x7fffffff /* max # of blocks handled */
struct dk_vtoc {
uint32_t v_bootinfo[3]; /* info needed by mboot (unsupported) */
uint32_t v_sanity; /* to verify vtoc sanity */
uint32_t v_version; /* layout version */
char v_volume[LEN_DKL_VVOL]; /* volume name */
uint16_t v_sectorsz; /* sector size in bytes */
uint16_t v_nparts; /* number of partitions */
uint32_t v_reserved[10]; /* free space */
struct {
uint16_t p_tag; /* ID tag of partition */
uint16_t p_flag; /* permission flags */
uint32_t p_start;/* start sector no of partition */
int32_t p_size; /* # of blocks in partition */
} v_part[NDKMAP]; /* partition headers */
uint32_t timestamp[NDKMAP]; /* partition timestamp (unsupported) */
char v_asciilabel[LEN_DKL_ASCII]; /* for compatibility */
};
#define LEN_DKL_PAD (DK_LABEL_SIZE - \
((sizeof (struct dk_vtoc) + \
(4 * sizeof (uint32_t)) + \
(12 * sizeof (uint16_t)) + \
(2 * (sizeof (uint16_t))))))
struct dk_label {
struct dk_vtoc dkl_vtoc; /* vtoc inclusions from AT&T SVr4 */
uint32_t dkl_pcyl; /* # of physical cylinders */
uint32_t dkl_ncyl; /* # of data cylinders */
uint16_t dkl_acyl; /* # of alternate cylinders */
uint16_t dkl_bcyl; /* cyl offset (for fixed head area) */
uint32_t dkl_nhead; /* # of heads */
uint32_t dkl_nsect; /* # of data sectors per track */
uint16_t dkl_intrlv; /* interleave factor */
uint16_t dkl_skew; /* skew factor */
uint16_t dkl_apc; /* alternates per cyl (SCSI only) */
uint16_t dkl_rpm; /* revolutions per minute */
uint16_t dkl_write_reinstruct; /* # sectors to skip, writes */
uint16_t dkl_read_reinstruct; /* # sectors to skip, reads */
uint16_t dkl_extra[4]; /* for compatible expansion */
char dkl_pad[LEN_DKL_PAD]; /* unused part of 512 bytes */
uint16_t dkl_magic; /* identifies this label format */
uint16_t dkl_cksum; /* xor checksum of sector */
};
#ifdef CTASSERT
CTASSERT(sizeof(struct dk_label) == 512);
#endif
#endif /* _SYS_VTOC_H_ */