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#ifndef _LINUX_GENHD_H
#define _LINUX_GENHD_H
/*
* genhd.h Copyright (C) 1992 Drew Eckhardt
* Generic hard disk header file by
* Drew Eckhardt
*
* <drew@colorado.edu>
*/
#include <linux/config.h>
#include <linux/types.h>
#define CONFIG_MSDOS_PARTITION 1
#ifdef __alpha__
#define CONFIG_OSF_PARTITION 1
#endif
#if defined(__sparc__) || defined(CONFIG_SMD_DISKLABEL)
#define CONFIG_SUN_PARTITION 1
#endif
#if defined(CONFIG_SGI) || defined(CONFIG_SGI_DISKLABEL)
#define CONFIG_SGI_PARTITION 1
#endif
/* These three have identical behaviour; use the second one if DOS fdisk gets
confused about extended/logical partitions starting past cylinder 1023. */
#define DOS_EXTENDED_PARTITION 5
#define LINUX_EXTENDED_PARTITION 0x85
#define WIN98_EXTENDED_PARTITION 0x0f
#define LINUX_SWAP_PARTITION 0x82
#ifdef CONFIG_SOLARIS_X86_PARTITION
#define SOLARIS_X86_PARTITION LINUX_SWAP_PARTITION
#endif
#define DM6_PARTITION 0x54 /* has DDO: use xlated geom & offset */
#define EZD_PARTITION 0x55 /* EZ-DRIVE */
#define DM6_AUX1PARTITION 0x51 /* no DDO: use xlated geom */
#define DM6_AUX3PARTITION 0x53 /* no DDO: use xlated geom */
struct partition {
unsigned char boot_ind; /* 0x80 - active */
unsigned char head; /* starting head */
unsigned char sector; /* starting sector */
unsigned char cyl; /* starting cylinder */
unsigned char sys_ind; /* What partition type */
unsigned char end_head; /* end head */
unsigned char end_sector; /* end sector */
unsigned char end_cyl; /* end cylinder */
unsigned int start_sect; /* starting sector counting from 0 */
unsigned int nr_sects; /* nr of sectors in partition */
} __attribute__((packed));
struct hd_struct {
long start_sect;
long nr_sects;
};
struct gendisk {
int major; /* major number of driver */
const char *major_name; /* name of major driver */
int minor_shift; /* number of times minor is shifted to
get real minor */
int max_p; /* maximum partitions per device */
int max_nr; /* maximum number of real devices */
void (*init)(struct gendisk *); /* Initialization called before we do our thing */
struct hd_struct *part; /* [indexed by minor] */
int *sizes; /* [idem], device size in blocks */
int nr_real; /* number of real devices */
void *real_devices; /* internal use */
struct gendisk *next;
};
#ifdef CONFIG_SOLARIS_X86_PARTITION
#define SOLARIS_X86_NUMSLICE 8
#define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL)
struct solaris_x86_slice {
ushort s_tag; /* ID tag of partition */
ushort s_flag; /* permision flags */
daddr_t s_start; /* start sector no of partition */
long s_size; /* # of blocks in partition */
};
struct solaris_x86_vtoc {
unsigned long v_bootinfo[3]; /* info needed by mboot (unsupported) */
unsigned long v_sanity; /* to verify vtoc sanity */
unsigned long v_version; /* layout version */
char v_volume[8]; /* volume name */
ushort v_sectorsz; /* sector size in bytes */
ushort v_nparts; /* number of partitions */
unsigned long v_reserved[10]; /* free space */
struct solaris_x86_slice
v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */
time_t timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp (unsupported) */
char v_asciilabel[128]; /* for compatibility */
};
#endif /* CONFIG_SOLARIS_X86_PARTITION */
#ifdef CONFIG_BSD_DISKLABEL
/*
* BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il>
* updated by Marc Espie <Marc.Espie@openbsd.org>
*/
#define FREEBSD_PARTITION 0xa5 /* FreeBSD Partition ID */
#define OPENBSD_PARTITION 0xa6 /* OpenBSD Partition ID */
#define NETBSD_PARTITION 0xa9 /* NetBSD Partition ID */
#define BSDI_PARTITION 0xb7 /* BSDI Partition ID */
/* Ours is not to wonder why.. */
#define BSD_PARTITION FREEBSD_PARTITION
/* check against BSD src/sys/sys/disklabel.h for consistency */
#define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */
#define BSD_MAXPARTITIONS 8
#define OPENBSD_MAXPARTITIONS 16
#define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */
struct bsd_disklabel {
__u32 d_magic; /* the magic number */
__s16 d_type; /* drive type */
__s16 d_subtype; /* controller/d_type specific */
char d_typename[16]; /* type name, e.g. "eagle" */
char d_packname[16]; /* pack identifier */
__u32 d_secsize; /* # of bytes per sector */
__u32 d_nsectors; /* # of data sectors per track */
__u32 d_ntracks; /* # of tracks per cylinder */
__u32 d_ncylinders; /* # of data cylinders per unit */
__u32 d_secpercyl; /* # of data sectors per cylinder */
__u32 d_secperunit; /* # of data sectors per unit */
__u16 d_sparespertrack; /* # of spare sectors per track */
__u16 d_sparespercyl; /* # of spare sectors per cylinder */
__u32 d_acylinders; /* # of alt. cylinders per unit */
__u16 d_rpm; /* rotational speed */
__u16 d_interleave; /* hardware sector interleave */
__u16 d_trackskew; /* sector 0 skew, per track */
__u16 d_cylskew; /* sector 0 skew, per cylinder */
__u32 d_headswitch; /* head switch time, usec */
__u32 d_trkseek; /* track-to-track seek, usec */
__u32 d_flags; /* generic flags */
#define NDDATA 5
__u32 d_drivedata[NDDATA]; /* drive-type specific information */
#define NSPARE 5
__u32 d_spare[NSPARE]; /* reserved for future use */
__u32 d_magic2; /* the magic number (again) */
__u16 d_checksum; /* xor of data incl. partitions */
/* filesystem and partition information: */
__u16 d_npartitions; /* number of partitions in following */
__u32 d_bbsize; /* size of boot area at sn0, bytes */
__u32 d_sbsize; /* max size of fs superblock, bytes */
struct bsd_partition { /* the partition table */
__u32 p_size; /* number of sectors in partition */
__u32 p_offset; /* starting sector */
__u32 p_fsize; /* filesystem basic fragment size */
__u8 p_fstype; /* filesystem type, see below */
__u8 p_frag; /* filesystem fragments per block */
__u16 p_cpg; /* filesystem cylinders per group */
} d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */
};
#endif /* CONFIG_BSD_DISKLABEL */
#ifdef CONFIG_UNIXWARE_DISKLABEL
/*
* Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl>
* and Krzysztof G. Baranowski <kgb@knm.org.pl>
*/
#define UNIXWARE_PARTITION 0x63 /* Partition ID, same as */
/* GNU_HURD and SCO Unix */
#define UNIXWARE_DISKMAGIC (0xCA5E600DUL) /* The disk magic number */
#define UNIXWARE_DISKMAGIC2 (0x600DDEEEUL) /* The slice table magic nr */
#define UNIXWARE_NUMSLICE 16
#define UNIXWARE_FS_UNUSED 0 /* Unused slice entry ID */
struct unixware_slice {
__u16 s_label; /* label */
__u16 s_flags; /* permission flags */
__u32 start_sect; /* starting sector */
__u32 nr_sects; /* number of sectors in slice */
};
struct unixware_disklabel {
__u32 d_type; /* drive type */
__u32 d_magic; /* the magic number */
__u32 d_version; /* version number */
char d_serial[12]; /* serial number of the device */
__u32 d_ncylinders; /* # of data cylinders per device */
__u32 d_ntracks; /* # of tracks per cylinder */
__u32 d_nsectors; /* # of data sectors per track */
__u32 d_secsize; /* # of bytes per sector */
__u32 d_part_start; /* # of first sector of this partition */
__u32 d_unknown1[12]; /* ? */
__u32 d_alt_tbl; /* byte offset of alternate table */
__u32 d_alt_len; /* byte length of alternate table */
__u32 d_phys_cyl; /* # of physical cylinders per device */
__u32 d_phys_trk; /* # of physical tracks per cylinder */
__u32 d_phys_sec; /* # of physical sectors per track */
__u32 d_phys_bytes; /* # of physical bytes per sector */
__u32 d_unknown2; /* ? */
__u32 d_unknown3; /* ? */
__u32 d_pad[8]; /* pad */
struct unixware_vtoc {
__u32 v_magic; /* the magic number */
__u32 v_version; /* version number */
char v_name[8]; /* volume name */
__u16 v_nslices; /* # of slices */
__u16 v_unknown1; /* ? */
__u32 v_reserved[10]; /* reserved */
struct unixware_slice
v_slice[UNIXWARE_NUMSLICE]; /* slice headers */
} vtoc;
}; /* 408 */
#endif /* CONFIG_UNIXWARE_DISKLABEL */
#ifdef __KERNEL__
extern struct gendisk *gendisk_head; /* linked list of disks */
char *disk_name (struct gendisk *hd, int minor, char *buf);
int get_hardsect_size(kdev_t dev);
#endif
#endif
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