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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>
#include <linux/major.h>
enum {
/* These three have identical behaviour; use the second one if DOS fdisk gets
confused about extended/logical partitions starting past cylinder 1023. */
DOS_EXTENDED_PARTITION = 5,
LINUX_EXTENDED_PARTITION = 0x85,
WIN98_EXTENDED_PARTITION = 0x0f,
LINUX_SWAP_PARTITION = 0x82,
LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */
SOLARIS_X86_PARTITION = LINUX_SWAP_PARTITION,
DM6_PARTITION = 0x54, /* has DDO: use xlated geom & offset */
EZD_PARTITION = 0x55, /* EZ-DRIVE */
DM6_AUX1PARTITION = 0x51, /* no DDO: use xlated geom */
DM6_AUX3PARTITION = 0x53, /* no DDO: use xlated geom */
FREEBSD_PARTITION = 0xa5, /* FreeBSD Partition ID */
OPENBSD_PARTITION = 0xa6, /* OpenBSD Partition ID */
NETBSD_PARTITION = 0xa9, /* NetBSD Partition ID */
BSDI_PARTITION = 0xb7, /* BSDI Partition ID */
/* Ours is not to wonder why.. */
BSD_PARTITION = FREEBSD_PARTITION,
MINIX_PARTITION = 0x81, /* Minix Partition ID */
PLAN9_PARTITION = 0x39, /* Plan 9 Partition ID */
UNIXWARE_PARTITION = 0x63, /* Partition ID, same as */
/* GNU_HURD and SCO Unix */
};
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));
#ifdef __KERNEL__
# include <linux/devfs_fs_kernel.h>
struct hd_struct {
unsigned long start_sect;
unsigned long nr_sects;
devfs_handle_t de; /* primary (master) devfs entry */
int number; /* stupid old code wastes space */
/* Performance stats: */
unsigned int ios_in_flight;
unsigned int io_ticks;
unsigned int last_idle_time;
unsigned int last_queue_change;
unsigned int aveq;
unsigned int rd_ios;
unsigned int rd_merges;
unsigned int rd_ticks;
unsigned int rd_sectors;
unsigned int wr_ios;
unsigned int wr_merges;
unsigned int wr_ticks;
unsigned int wr_sectors;
};
#define GENHD_FL_REMOVABLE 1
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 */
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;
struct block_device_operations *fops;
devfs_handle_t *de_arr; /* one per physical disc */
char *flags; /* one per physical disc */
};
/* drivers/block/genhd.c */
extern struct gendisk *gendisk_head;
extern void add_gendisk(struct gendisk *gp);
extern void del_gendisk(struct gendisk *gp);
extern struct gendisk *get_gendisk(kdev_t dev);
extern int walk_gendisk(int (*walk)(struct gendisk *, void *), void *);
#endif /* __KERNEL__ */
#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; /* permission flags */
unsigned int s_start; /* start sector no of partition */
unsigned int s_size; /* # of blocks in partition */
};
struct solaris_x86_vtoc {
unsigned int v_bootinfo[3]; /* info needed by mboot (unsupported) */
unsigned int v_sanity; /* to verify vtoc sanity */
unsigned int v_version; /* layout version */
char v_volume[8]; /* volume name */
ushort v_sectorsz; /* sector size in bytes */
ushort v_nparts; /* number of partitions */
unsigned int v_reserved[10]; /* free space */
struct solaris_x86_slice
v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */
unsigned int 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>
*/
/* 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_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 CONFIG_MINIX_SUBPARTITION
# define MINIX_NR_SUBPARTITIONS 4
#endif /* CONFIG_MINIX_SUBPARTITION */
#ifdef __KERNEL__
char *disk_name (struct gendisk *hd, int minor, char *buf);
/*
* disk_round_stats is used to round off the IO statistics for a disk
* for a complete clock tick.
*/
void disk_round_stats(struct hd_struct *hd);
/*
* Account for the completion of an IO request (used by drivers which
* bypass the normal end_request processing)
*/
struct request;
void req_finished_io(struct request *);
extern void devfs_register_partitions (struct gendisk *dev, int minor,
int unregister);
/*
* FIXME: this should use genhd->minor_shift, but that is slow to look up.
*/
static inline unsigned int disk_index (kdev_t dev)
{
int major = MAJOR(dev);
int minor = MINOR(dev);
unsigned int index;
switch (major) {
case DAC960_MAJOR+0:
index = (minor & 0x00f8) >> 3;
break;
case SCSI_DISK0_MAJOR:
index = (minor & 0x00f0) >> 4;
break;
case IDE0_MAJOR: /* same as HD_MAJOR */
case XT_DISK_MAJOR:
index = (minor & 0x0040) >> 6;
break;
case IDE1_MAJOR:
index = ((minor & 0x0040) >> 6) + 2;
break;
default:
return 0;
}
return index;
}
#endif
#endif
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