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Diffstat (limited to 'sys/sys/disk/bsd.h')
| -rw-r--r-- | sys/sys/disk/bsd.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/sys/sys/disk/bsd.h b/sys/sys/disk/bsd.h new file mode 100644 index 000000000000..829663bcf55c --- /dev/null +++ b/sys/sys/disk/bsd.h @@ -0,0 +1,191 @@ +/*- + * 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. + * 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_DISK_BSD_H_ +#define _SYS_DISK_BSD_H_ + +/* The disk magic number */ +#define BSD_MAGIC 0x82564557U + +#define BSD_NPARTS_MIN 8 +#define BSD_NPARTS_MAX 20 + +/* Size of bootblock area in sector-size neutral bytes */ +#define BSD_BOOTBLOCK_SIZE 8192 + +/* partition containing whole disk */ +#define BSD_PART_RAW 2 + +/* partition normally containing swap */ +#define BSD_PART_SWAP 1 + +/* Drive-type specific data size (in number of 32-bit inegrals) */ +#define BSD_NDRIVEDATA 5 + +/* Number of spare 32-bit integrals following drive-type data */ +#define BSD_NSPARE 5 + +struct disklabel { + uint32_t d_magic; /* the magic number */ + uint16_t d_type; /* drive type */ + uint16_t d_subtype; /* controller/d_type specific */ + char d_typename[16]; /* type name, e.g. "eagle" */ + + char d_packname[16]; /* pack identifier */ + + /* disk geometry: */ + uint32_t d_secsize; /* # of bytes per sector */ + uint32_t d_nsectors; /* # of data sectors per track */ + uint32_t d_ntracks; /* # of tracks per cylinder */ + uint32_t d_ncylinders; /* # of data cylinders per unit */ + uint32_t d_secpercyl; /* # of data sectors per cylinder */ + uint32_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. + */ + uint16_t d_sparespertrack; /* # of spare sectors per track */ + uint16_t d_sparespercyl; /* # of spare sectors per cylinder */ + /* + * Alternate cylinders include maintenance, replacement, configuration + * description areas, etc. + */ + uint32_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. + */ + uint16_t d_rpm; /* rotational speed */ + uint16_t d_interleave; /* hardware sector interleave */ + uint16_t d_trackskew; /* sector 0 skew, per track */ + uint16_t d_cylskew; /* sector 0 skew, per cylinder */ + uint32_t d_headswitch; /* head switch time, usec */ + uint32_t d_trkseek; /* track-to-track seek, usec */ + uint32_t d_flags; /* generic flags */ + uint32_t d_drivedata[BSD_NDRIVEDATA]; /* drive-type specific data */ + uint32_t d_spare[BSD_NSPARE]; /* reserved for future use */ + uint32_t d_magic2; /* the magic number (again) */ + uint16_t d_checksum; /* xor of data incl. partitions */ + + /* filesystem and partition information: */ + uint16_t d_npartitions; /* number of partitions in following */ + uint32_t d_bbsize; /* size of boot area at sn0, bytes */ + uint32_t d_sbsize; /* max size of fs superblock, bytes */ + struct partition { /* the partition table */ + uint32_t p_size; /* number of sectors in partition */ + uint32_t p_offset; /* starting sector */ + uint32_t p_fsize; /* filesystem basic fragment size */ + uint8_t p_fstype; /* filesystem type, see below */ + uint8_t p_frag; /* filesystem fragments per block */ + uint16_t p_cpg; /* filesystem cylinders per group */ + } d_partitions[BSD_NPARTS_MIN]; /* actually may be more */ +}; +#ifdef CTASSERT +CTASSERT(sizeof(struct disklabel) == 148 + BSD_NPARTS_MIN * 16); +#endif + +/* 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 */ + +/* + * 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_FILECORE 16 /* Acorn Filecore Filing System */ +#define FS_EXT2FS 17 /* ext2fs */ +#define FS_NTFS 18 /* Windows/NT file system */ +#define FS_CCD 20 /* concatenated disk component */ +#define FS_JFS2 21 /* IBM JFS2 */ +#define FS_HAMMER 22 /* DragonFlyBSD Hammer FS */ +#define FS_HAMMER2 23 /* DragonFlyBSD Hammer2 FS */ +#define FS_UDF 24 /* UDF */ +#define FS_EFS 26 /* SGI's Extent File system */ +#define FS_ZFS 27 /* Sun's ZFS */ +#define FS_NANDFS 30 /* FreeBSD nandfs (NiLFS derived) */ + +/* + * 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 */ + +#endif /* !_SYS_DISK_BSD_H_ */ |