/*
* Copyright (c) 1987, 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)disklabel.h 8.2 (Berkeley) 7/10/94
* $FreeBSD$
*/
#ifndef _SYS_DISKLABEL_H_
#define _SYS_DISKLABEL_H_
#ifndef _KERNEL
#include <sys/types.h>
#endif
#include <sys/ioccom.h>
/*
* Disk description table, see disktab(5)
*/
#define _PATH_DISKTAB "/etc/disktab"
/*
* Each disk has a label which includes information about the hardware
* disk geometry, filesystem partitions, and drive specific information.
* The label is in block 0 or 1, possibly offset from the beginning
* to leave room for a bootstrap, etc.
*/
/* XXX these should be defined per controller (or drive) elsewhere, not here! */
#if defined(__i386__) || defined(__amd64__) || defined(__ia64__)
#define LABELSECTOR 1 /* sector containing label */
#define LABELOFFSET 0 /* offset of label in sector */
#endif
#ifdef __alpha__
#define LABELSECTOR 0
#define LABELOFFSET 64
#endif
#define DISKMAGIC ((u_int32_t)0x82564557) /* The disk magic number */
#ifndef MAXPARTITIONS
#define MAXPARTITIONS 8
#endif
/* Size of bootblock area in sector-size neutral bytes */
#define BBSIZE 8192
#define LABEL_PART 2 /* partition containing label */
#define RAW_PART 2 /* partition containing whole disk */
#define SWAP_PART 1 /* partition normally containing swap */
struct disklabel {
u_int32_t d_magic; /* the magic number */
u_int16_t d_type; /* drive type */
u_int16_t d_subtype; /* controller/d_type specific */
char d_typename[16]; /* type name, e.g. "eagle" */
char d_packname[16]; /* pack identifier */
/* disk geometry: */
u_int32_t d_secsize; /* # of bytes per sector */
u_int32_t d_nsectors; /* # of data sectors per track */
u_int32_t d_ntracks; /* # of tracks per cylinder */
u_int32_t d_ncylinders; /* # of data cylinders per unit */
u_int32_t d_secpercyl; /* # of data sectors per cylinder */
u_int32_t d_secperunit; /* # of data sectors per unit */
/*
* Spares (bad sector replacements) below are not counted in
* d_nsectors or d_secpercyl. Spare sectors are assumed to
* be physical sectors which occupy space at the end of each
* track and/or cylinder.
*/
u_int16_t d_sparespertrack; /* # of spare sectors per track */
u_int16_t d_sparespercyl; /* # of spare sectors per cylinder */
/*
* Alternate cylinders include maintenance, replacement, configuration
* description areas, etc.
*/
u_int32_t d_acylinders; /* # of alt. cylinders per unit */
/* hardware characteristics: */
/*
* d_interleave, d_trackskew and d_cylskew describe perturbations
* in the media format used to compensate for a slow controller.
* Interleave is physical sector interleave, set up by the
* formatter or controller when formatting. When interleaving is
* in use, logically adjacent sectors are not physically
* contiguous, but instead are separated by some number of
* sectors. It is specified as the ratio of physical sectors
* traversed per logical sector. Thus an interleave of 1:1
* implies contiguous layout, while 2:1 implies that logical
* sector 0 is separated by one sector from logical sector 1.
* d_trackskew is the offset of sector 0 on track N relative to
* sector 0 on track N-1 on the same cylinder. Finally, d_cylskew
* is the offset of sector 0 on cylinder N relative to sector 0
* on cylinder N-1.
*/
u_int16_t d_rpm; /* rotational speed */
u_int16_t d_interleave; /* hardware sector interleave */
u_int16_t d_trackskew; /* sector 0 skew, per track */
u_int16_t d_cylskew; /* sector 0 skew, per cylinder */
u_int32_t d_headswitch; /* head switch time, usec */
u_int32_t d_trkseek; /* track-to-track seek, usec */
u_int32_t d_flags; /* generic flags */
#define NDDATA 5
u_int32_t d_drivedata[NDDATA]; /* drive-type specific information */
#define NSPARE 5
u_int32_t d_spare[NSPARE]; /* reserved for future use */
u_int32_t d_magic2; /* the magic number (again) */
u_int16_t d_checksum; /* xor of data incl. partitions */
/* filesystem and partition information: */
u_int16_t d_npartitions; /* number of partitions in following */
u_int32_t d_bbsize; /* size of boot area at sn0, bytes */
u_int32_t d_sbsize; /* max size of fs superblock, bytes */
struct partition { /* the partition table */
u_int32_t p_size; /* number of sectors in partition */
u_int32_t p_offset; /* starting sector */
u_int32_t p_fsize; /* filesystem basic fragment size */
u_int8_t p_fstype; /* filesystem type, see below */
u_int8_t p_frag; /* filesystem fragments per block */
u_int16_t p_cpg; /* filesystem cylinders per group */
} d_partitions[MAXPARTITIONS]; /* actually may be more */
};
#ifdef CTASSERT
CTASSERT(sizeof(struct disklabel) == 148 + MAXPARTITIONS * 16);
#endif
static __inline u_int16_t dkcksum(struct disklabel *lp);
static __inline u_int16_t
dkcksum(struct disklabel *lp)
{
u_int16_t *start, *end;
u_int16_t sum = 0;
start = (u_int16_t *)lp;
end = (u_int16_t *)&lp->d_partitions[lp->d_npartitions];
while (start < end)
sum ^= *start++;
return (sum);
}
/* d_type values: */
#define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */
#define DTYPE_MSCP 2 /* MSCP */
#define DTYPE_DEC 3 /* other DEC (rk, rl) */
#define DTYPE_SCSI 4 /* SCSI */
#define DTYPE_ESDI 5 /* ESDI interface */
#define DTYPE_ST506 6 /* ST506 etc. */
#define DTYPE_HPIB 7 /* CS/80 on HP-IB */
#define DTYPE_HPFL 8 /* HP Fiber-link */
#define DTYPE_FLOPPY 10 /* floppy */
#define DTYPE_CCD 11 /* concatenated disk */
#define DTYPE_VINUM 12 /* vinum volume */
#define DTYPE_DOC2K 13 /* Msys DiskOnChip */
#define DTYPE_RAID 14 /* CMU RAIDFrame */
#define DTYPE_JFS2 16 /* IBM JFS 2 */
#ifdef DKTYPENAMES
static const char *dktypenames[] = {
"unknown",
"SMD",
"MSCP",
"old DEC",
"SCSI",
"ESDI",
"ST506",
"HP-IB",
"HP-FL",
"type 9",
"floppy",
"CCD",
"Vinum",
"DOC2K",
"Raid",
"?",
"jfs",
NULL
};
#define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1)
#endif
/*
* Filesystem type and version.
* Used to interpret other filesystem-specific
* per-partition information.
*/
#define FS_UNUSED 0 /* unused */
#define FS_SWAP 1 /* swap */
#define FS_V6 2 /* Sixth Edition */
#define FS_V7 3 /* Seventh Edition */
#define FS_SYSV 4 /* System V */
#define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */
#define FS_V8 6 /* Eighth Edition, 4K blocks */
#define FS_BSDFFS 7 /* 4.2BSD fast filesystem */
#define FS_MSDOS 8 /* MSDOS filesystem */
#define FS_BSDLFS 9 /* 4.4BSD log-structured filesystem */
#define FS_OTHER 10 /* in use, but unknown/unsupported */
#define FS_HPFS 11 /* OS/2 high-performance filesystem */
#define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */
#define FS_BOOT 13 /* partition contains bootstrap */
#define FS_VINUM 14 /* Vinum drive */
#define FS_RAID 15 /* RAIDFrame drive */
#define FS_JFS2 21 /* IBM JFS2 */
#ifdef FSTYPENAMES
static const char *fstypenames[] = {
"unused",
"swap",
"Version 6",
"Version 7",
"System V",
"4.1BSD",
"Eighth Edition",
"4.2BSD",
"MSDOS",
"4.4LFS",
"unknown",
"HPFS",
"ISO9660",
"boot",
"vinum",
"raid",
"?",
"?",
"?",
"?",
"jfs",
NULL
};
#define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1)
#endif
/*
* flags shared by various drives:
*/
#define D_REMOVABLE 0x01 /* removable media */
#define D_ECC 0x02 /* supports ECC */
#define D_BADSECT 0x04 /* supports bad sector forw. */
#define D_RAMDISK 0x08 /* disk emulator */
#define D_CHAIN 0x10 /* can do back-back transfers */
/*
* Disklabel-specific ioctls.
*
* NB: <sys/disk.h> defines ioctls from 'd'/128 and up.
*/
/* get and set disklabel */
#define DIOCGDINFO _IOR('d', 101, struct disklabel)/* get */
#define DIOCSDINFO _IOW('d', 102, struct disklabel)/* set */
#define DIOCWDINFO _IOW('d', 103, struct disklabel)/* set, update disk */
#define DIOCBSDBB _IOW('d', 110, void *) /* write bootblocks */
/*
* Functions for proper encoding/decoding of struct disklabel into/from
* bytestring.
*/
void bsd_partition_le_dec(u_char *ptr, struct partition *d);
int bsd_disklabel_le_dec(u_char *ptr, struct disklabel *d, int maxpart);
void bsd_partition_le_enc(u_char *ptr, struct partition *d);
void bsd_disklabel_le_enc(u_char *ptr, struct disklabel *d);
#ifndef _KERNEL
__BEGIN_DECLS
struct disklabel *getdiskbyname(const char *);
__END_DECLS
#endif
#endif /* !_SYS_DISKLABEL_H_ */
