192 lines
6.0 KiB
C
Executable File
192 lines
6.0 KiB
C
Executable File
/*
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* Copyright (c) 1990 by Sun Microsystems, Inc.
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*/
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#ifndef _SYS_DKLABEL_H
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#define _SYS_DKLABEL_H
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#pragma ident "@(#)dklabel.h 1.4 94/08/08 SMI"
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#include <sys/isa_defs.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Miscellaneous defines
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*/
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#define DKL_MAGIC 0xDABE /* magic number */
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#define FKL_MAGIC 0xff /* magic number for DOS floppies */
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#if defined(_SUNOS_VTOC_16)
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#define NDKMAP 16 /* # of logical partitions */
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#elif defined(_SUNOS_VTOC_8)
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#define NDKMAP 8 /* # of logical partitions */
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#else
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#error No Platform defined.
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#endif
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#define LEN_DKL_ASCII 128 /* length of dkl_asciilabel */
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#define LEN_DKL_VVOL 8 /* length of v_volume */
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#define DK_LABEL_SIZE 512 /* size of disk label */
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#define DK_LABEL_LOC 1 /* location of disk label */
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/*
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* Format of a Sun disk label.
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* Resides in cylinder 0, head 0, sector 0.
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*
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* sizeof (struct dk_label) should be 512 (the current sector size),
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* but should the sector size increase, this structure should remain
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* at the beginning of the sector.
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*/
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/* partition headers: section 1 */
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struct dk_map {
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daddr_t dkl_cylno; /* starting cylinder */
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daddr_t dkl_nblk; /* number of blocks; if == 0, */
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/* partition is undefined */
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};
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/*
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* partition headers: section 2,
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* brought over from AT&T SVr4 vtoc structure.
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*/
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struct dk_map2 {
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unsigned short p_tag; /* ID tag of partition */
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unsigned short p_flag; /* permission flag */
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};
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struct dkl_partition {
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ushort p_tag; /* ID tag of partition */
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ushort p_flag; /* permision flags */
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daddr_t p_start; /* start sector no of partition */
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long p_size; /* # of blocks in partition */
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};
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/* vtoc inclusions from AT&T SVr4 */
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struct dk_vtoc {
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#if defined(_SUNOS_VTOC_16)
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unsigned long v_bootinfo[3]; /* info needed by mboot (unsupported) */
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unsigned long v_sanity; /* to verify vtoc sanity */
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unsigned long v_version; /* layout version */
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char v_volume[LEN_DKL_VVOL]; /* volume name */
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ushort v_sectorsz; /* sector size in bytes */
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ushort v_nparts; /* number of partitions */
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unsigned long v_reserved[10]; /* free space */
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struct dkl_partition v_part[NDKMAP]; /* partition headers */
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time_t timestamp[NDKMAP]; /* partition timestamp (unsupported) */
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char v_asciilabel[LEN_DKL_ASCII]; /* for compatibility */
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#elif defined(_SUNOS_VTOC_8)
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unsigned long v_version; /* layout version */
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char v_volume[LEN_DKL_VVOL]; /* volume name */
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unsigned short v_nparts; /* number of partitions */
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struct dk_map2 v_part[NDKMAP]; /* partition hdrs, sec 2 */
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u_long v_bootinfo[3]; /* info needed by mboot */
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u_long v_sanity; /* to verify vtoc sanity */
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u_long v_reserved[10]; /* free space */
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time_t v_timestamp[NDKMAP]; /* partition timestamp */
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#else
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#error No Platform defined.
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#endif
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};
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/*
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* define the amount of disk label padding needed to make
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* the entire structure occupy 512 bytes.
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*/
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#if defined(_SUNOS_VTOC_16)
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#define LEN_DKL_PAD (DK_LABEL_SIZE - \
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((sizeof (struct dk_vtoc) + \
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(4 * sizeof (unsigned long)) + \
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(12 * sizeof (unsigned short)) + \
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(2 * (sizeof (unsigned short))))))
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#elif defined(_SUNOS_VTOC_8)
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#define LEN_DKL_PAD (DK_LABEL_SIZE \
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- ((LEN_DKL_ASCII) + \
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(sizeof (struct dk_vtoc)) + \
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(sizeof (struct dk_map) * NDKMAP) + \
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(14 * (sizeof (unsigned short))) + \
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(2 * (sizeof (unsigned short)))))
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#else
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#error No Platform defined.
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#endif
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struct dk_label {
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#if defined(_SUNOS_VTOC_16)
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struct dk_vtoc dkl_vtoc; /* vtoc inclusions from AT&T SVr4 */
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unsigned long dkl_pcyl; /* # of physical cylinders */
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unsigned long dkl_ncyl; /* # of data cylinders */
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unsigned short dkl_acyl; /* # of alternate cylinders */
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unsigned short dkl_bcyl; /* cyl offset (for fixed head area) */
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unsigned long dkl_nhead; /* # of heads */
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unsigned long dkl_nsect; /* # of data sectors per track */
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unsigned short dkl_intrlv; /* interleave factor */
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unsigned short dkl_skew; /* skew factor */
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unsigned short dkl_apc; /* alternates per cyl (SCSI only) */
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unsigned short dkl_rpm; /* revolutions per minute */
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unsigned short dkl_write_reinstruct; /* # sectors to skip, writes */
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unsigned short dkl_read_reinstruct; /* # sectors to skip, reads */
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unsigned short dkl_extra[4]; /* for compatible expansion */
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char dkl_pad[LEN_DKL_PAD]; /* unused part of 512 bytes */
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#elif defined(_SUNOS_VTOC_8)
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char dkl_asciilabel[LEN_DKL_ASCII]; /* for compatibility */
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struct dk_vtoc dkl_vtoc; /* vtoc inclusions from AT&T SVr4 */
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unsigned short dkl_write_reinstruct; /* # sectors to skip, writes */
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unsigned short dkl_read_reinstruct; /* # sectors to skip, reads */
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char dkl_pad[LEN_DKL_PAD]; /* unused part of 512 bytes */
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unsigned short dkl_rpm; /* rotations per minute */
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unsigned short dkl_pcyl; /* # physical cylinders */
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unsigned short dkl_apc; /* alternates per cylinder */
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unsigned short dkl_obs1; /* obsolete */
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unsigned short dkl_obs2; /* obsolete */
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unsigned short dkl_intrlv; /* interleave factor */
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unsigned short dkl_ncyl; /* # of data cylinders */
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unsigned short dkl_acyl; /* # of alternate cylinders */
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unsigned short dkl_nhead; /* # of heads in this partition */
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unsigned short dkl_nsect; /* # of 512 byte sectors per track */
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unsigned short dkl_obs3; /* obsolete */
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unsigned short dkl_obs4; /* obsolete */
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/* */
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struct dk_map dkl_map[NDKMAP]; /* logical partition headers */
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#else
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#error No Platform defined.
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#endif
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unsigned short dkl_magic; /* identifies this label format */
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unsigned short dkl_cksum; /* xor checksum of sector */
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};
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#if defined(_SUNOS_VTOC_16)
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#define dkl_asciilabel dkl_vtoc.v_asciilabel
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#define v_timestamp timestamp
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#endif
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#if defined(_SUNOS_VTOC_8)
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/*
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* These defines are for historic compatibility with old drivers.
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*/
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#define dkl_gap1 dkl_obs1 /* used to be gap1 */
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#define dkl_gap2 dkl_obs2 /* used to be gap2 */
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#define dkl_bhead dkl_obs3 /* used to be label head offset */
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#define dkl_ppart dkl_obs4 /* used to by physical partition */
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#endif
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struct fk_label { /* DOS floppy label */
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u_char fkl_type;
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u_char fkl_magich;
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u_char fkl_magicl;
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u_char filler;
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};
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_DKLABEL_H */
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