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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)
- #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: same as DM6 (we think) */
- #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; /* partition table */
- int *sizes; /* device size in blocks, copied to blk_size[] */
- 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 */
-
- extern struct gendisk *gendisk_head; /* linked list of disks */
-
- /*
- * disk_name() is used by genhd.c and md.c.
- * It formats the devicename of the indicated disk
- * into the supplied buffer, and returns a pointer
- * to that same buffer (for convenience).
- */
- char *disk_name (struct gendisk *hd, int minor, char *buf);
-
- #endif
-