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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 | #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>
#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>
*/
#define BSD_PARTITION 0xa5 /* Partition ID */
#define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */
#define BSD_MAXPARTITIONS 8
#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 */
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
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