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hellwig |
/*
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* disklabel.h -- structure of the disklabel
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*/
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#ifndef _DISKLABEL_H_
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#define _DISKLABEL_H_
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#define DSKMAGIC 0x82564557
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#define NTYPENAME 16
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#define NPACKNAME 16
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#define NDDATA 5
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#define NSPARE 5
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#define MAXPARTS 16
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#define PADSIZE 108
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typedef struct {
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uint32_t p_size; /* number of sectors in partition */
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uint32_t p_offset; /* starting sector */
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uint32_t p_fsize; /* filesystem basic fragment size */
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uint8_t p_fstype; /* filesystem type */
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uint8_t p_frag; /* filesystem fragments per block */
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uint16_t p_cpg; /* filesystem cylinders per group */
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} Partition;
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typedef struct {
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uint32_t d_magic; /* magic number */
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uint16_t d_type; /* drive type */
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uint16_t d_subtype; /* controller, d_type specific */
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char d_typename[NTYPENAME]; /* type name */
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char d_packname[NPACKNAME]; /* pack identifier */
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uint32_t d_secsize; /* bytes per sector */
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uint32_t d_nsectors; /* data sectors per track */
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uint32_t d_ntracks; /* tracks per cylinder */
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uint32_t d_ncylinders; /* data cylinders per unit */
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uint32_t d_secpercyl; /* data sectors per cylinder */
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uint32_t d_secperunit; /* data sectors per unit */
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uint16_t d_sparespertrack; /* spare sectors per track */
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uint16_t d_sparespercyl; /* spare sectors per cylinder */
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uint32_t d_acylinders; /* alternative cylinders per unit */
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uint16_t d_rpm; /* rotational speed */
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uint16_t d_interleave; /* hardware sector interleave */
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uint16_t d_trackskew; /* sector 0 skew, per track */
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uint16_t d_cylskew; /* sector 0 skew, per cylinder */
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uint32_t d_headswitch; /* head switch time, usec */
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uint32_t d_trkseek; /* track-to-track seek, usec */
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uint32_t d_flags; /* generic flags */
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uint32_t d_drivedata[NDDATA]; /* drive-type specific information */
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uint32_t d_spare[NSPARE]; /* reserved for future use */
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uint32_t d_magic2; /* the magic number again */
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uint16_t d_checksum; /* xor of data incl partitions */
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uint16_t d_npartitions; /* number of partitions */
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uint32_t d_bbsize; /* size of boot area at sector 0, bytes */
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uint32_t d_sbsize; /* size of filesystem superblock, bytes */
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Partition d_parts[MAXPARTS]; /* the partition table */
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uint8_t d_pad[PADSIZE]; /* pad up to sector size */
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} DiskLabel;
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#endif /* _DISKLABEL_H_ */
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