234 lines
9.2 KiB
C
234 lines
9.2 KiB
C
/*
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* Copyright (c) 1987, 1988 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#define BSD_DISKMAGIC ((u_long) 0x82564557)
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#define BSD_MAXPARTITIONS 8
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#define BSD_LINUX_BOOTDIR "/usr/ucb/mdec"
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#if defined (i386)
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#define BSD_LABELSECTOR 1
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#define BSD_LABELOFFSET 0
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#define BSD_BBSIZE 8192 /* size of boot area, with label */
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#define BSD_SBSIZE 8192 /* max size of fs superblock */
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#elif defined (__alpha__)
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#error LABELSECTOR, LABELOFFSET, BBSIZE & SBSIZE are undefined for __alpha__
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#define BSD_LABELSECTOR 0
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#define BSD_LABELOFFSET 0
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#define BSD_BBSIZE 0
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#define BSD_SBSIZE 0
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#else
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#error unknown architecture
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#endif
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struct disklabel {
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u_long d_magic; /* the magic number */
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short d_type; /* drive type */
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short d_subtype; /* controller/d_type specific */
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char d_typename[16]; /* type name, e.g. "eagle" */
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/*
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* d_packname contains the pack identifier and is returned when
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* the disklabel is read off the disk or in-core copy.
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* d_boot0 and d_boot1 are the (optional) names of the
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* primary (block 0) and secondary (block 1-15) bootstraps
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* as found in /usr/mdec. These are returned when using
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* getdiskbyname(3) to retrieve the values from /etc/disktab.
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*/
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#if defined(KERNEL) || defined(STANDALONE)
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char d_packname[16]; /* pack identifier */
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#else
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union {
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char un_d_packname[16]; /* pack identifier */
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struct {
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char *un_d_boot0; /* primary bootstrap name */
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char *un_d_boot1; /* secondary bootstrap name */
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} un_b;
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} d_un;
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#define d_packname d_un.un_d_packname
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#define d_boot0 d_un.un_b.un_d_boot0
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#define d_boot1 d_un.un_b.un_d_boot1
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#endif /* ! KERNEL or STANDALONE */
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/* disk geometry: */
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u_long d_secsize; /* # of bytes per sector */
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u_long d_nsectors; /* # of data sectors per track */
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u_long d_ntracks; /* # of tracks per cylinder */
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u_long d_ncylinders; /* # of data cylinders per unit */
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u_long d_secpercyl; /* # of data sectors per cylinder */
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u_long d_secperunit; /* # of data sectors per unit */
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/*
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* Spares (bad sector replacements) below
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* are not counted in d_nsectors or d_secpercyl.
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* Spare sectors are assumed to be physical sectors
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* which occupy space at the end of each track and/or cylinder.
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*/
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u_short d_sparespertrack; /* # of spare sectors per track */
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u_short d_sparespercyl; /* # of spare sectors per cylinder */
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/*
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* Alternate cylinders include maintenance, replacement,
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* configuration description areas, etc.
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*/
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u_long d_acylinders; /* # of alt. cylinders per unit */
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/* hardware characteristics: */
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/*
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* d_interleave, d_trackskew and d_cylskew describe perturbations
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* in the media format used to compensate for a slow controller.
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* Interleave is physical sector interleave, set up by the formatter
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* or controller when formatting. When interleaving is in use,
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* logically adjacent sectors are not physically contiguous,
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* but instead are separated by some number of sectors.
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* It is specified as the ratio of physical sectors traversed
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* per logical sector. Thus an interleave of 1:1 implies contiguous
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* layout, while 2:1 implies that logical sector 0 is separated
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* by one sector from logical sector 1.
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* d_trackskew is the offset of sector 0 on track N
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* relative to sector 0 on track N-1 on the same cylinder.
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* Finally, d_cylskew is the offset of sector 0 on cylinder N
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* relative to sector 0 on cylinder N-1.
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*/
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u_short d_rpm; /* rotational speed */
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u_short d_interleave; /* hardware sector interleave */
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u_short d_trackskew; /* sector 0 skew, per track */
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u_short d_cylskew; /* sector 0 skew, per cylinder */
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u_long d_headswitch; /* head switch time, usec */
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u_long d_trkseek; /* track-to-track seek, usec */
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u_long d_flags; /* generic flags */
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#define NDDATA 5
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u_long d_drivedata[NDDATA]; /* drive-type specific information */
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#define NSPARE 5
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u_long d_spare[NSPARE]; /* reserved for future use */
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u_long d_magic2; /* the magic number (again) */
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u_short d_checksum; /* xor of data incl. partitions */
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/* filesystem and partition information: */
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u_short d_npartitions; /* number of partitions in following */
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u_long d_bbsize; /* size of boot area at sn0, bytes */
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u_long d_sbsize; /* max size of fs superblock, bytes */
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struct bsd_partition { /* the partition table */
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u_long p_size; /* number of sectors in partition */
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u_long p_offset; /* starting sector */
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u_long p_fsize; /* filesystem basic fragment size */
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u_char p_fstype; /* filesystem type, see below */
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u_char p_frag; /* filesystem fragments per block */
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u_short p_cpg; /* filesystem cylinders per group */
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} d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */
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};
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/* d_type values: */
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#define BSD_DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */
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#define BSD_DTYPE_MSCP 2 /* MSCP */
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#define BSD_DTYPE_DEC 3 /* other DEC (rk, rl) */
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#define BSD_DTYPE_SCSI 4 /* SCSI */
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#define BSD_DTYPE_ESDI 5 /* ESDI interface */
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#define BSD_DTYPE_ST506 6 /* ST506 etc. */
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#define BSD_DTYPE_HPIB 7 /* CS/80 on HP-IB */
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#define BSD_DTYPE_HPFL 8 /* HP Fiber-link */
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#define BSD_DTYPE_FLOPPY 10 /* floppy */
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/* d_subtype values: */
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#define BSD_DSTYPE_INDOSPART 0x8 /* is inside dos partition */
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#define BSD_DSTYPE_DOSPART(s) ((s) & 3) /* dos partition number */
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#define BSD_DSTYPE_GEOMETRY 0x10 /* drive params in label */
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#ifdef DKTYPENAMES
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static char *bsd_dktypenames[] = {
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"unknown",
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"SMD",
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"MSCP",
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"old DEC",
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"SCSI",
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"ESDI",
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"ST506",
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"HP-IB",
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"HP-FL",
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"type 9",
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"floppy",
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0
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};
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#define BSD_DKMAXTYPES (sizeof(bsd_dktypenames) / sizeof(bsd_dktypenames[0]) - 1)
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#endif
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/*
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* Filesystem type and version.
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* Used to interpret other filesystem-specific
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* per-partition information.
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*/
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#define BSD_FS_UNUSED 0 /* unused */
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#define BSD_FS_SWAP 1 /* swap */
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#define BSD_FS_V6 2 /* Sixth Edition */
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#define BSD_FS_V7 3 /* Seventh Edition */
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#define BSD_FS_SYSV 4 /* System V */
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#define BSD_FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */
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#define BSD_FS_V8 6 /* Eighth Edition, 4K blocks */
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#define BSD_FS_BSDFFS 7 /* 4.2BSD fast file system */
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#define BSD_FS_MSDOS 8 /* MS-DOS file system */
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#define BSD_FS_BSDLFS 9 /* 4.4BSD log-structured file system */
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#define BSD_FS_OTHER 10 /* in use, but unknown/unsupported */
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#define BSD_FS_HPFS 11 /* OS/2 high-performance file system */
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#define BSD_FS_ISO9660 12 /* ISO-9660 filesystem (cdrom) */
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#define BSD_FS_ISOFS BSD_FS_ISO9660
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#define BSD_FS_BOOT 13 /* partition contains bootstrap */
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#define BSD_FS_ADOS 14 /* AmigaDOS fast file system */
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#define BSD_FS_HFS 15 /* Macintosh HFS */
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#ifdef DKTYPENAMES
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static struct systypes bsd_fstypes[] = {
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{BSD_FS_UNUSED, "unused"},
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{BSD_FS_SWAP, "swap"},
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{BSD_FS_V6, "Version 6"},
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{BSD_FS_V7, "Version 7"},
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{BSD_FS_SYSV, "System V"},
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{BSD_FS_V71K, "4.1BSD"},
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{BSD_FS_V8, "Eighth Edition"},
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{BSD_FS_BSDFFS, "4.2BSD"},
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{BSD_FS_MSDOS, "MS-DOS"},
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{BSD_FS_BSDLFS, "4.4LFS"},
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{BSD_FS_OTHER, "unknown"},
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{BSD_FS_HPFS, "HPFS"},
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{BSD_FS_ISO9660,"ISO-9660"},
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{BSD_FS_BOOT, "boot"},
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{BSD_FS_ADOS, "ADOS"},
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{BSD_FS_HFS, "HFS"}
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};
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#define BSD_FSMAXTYPES (sizeof(bsd_fstypes) / sizeof(struct systypes))
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#endif
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/*
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* flags shared by various drives:
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*/
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#define BSD_D_REMOVABLE 0x01 /* removable media */
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#define BSD_D_ECC 0x02 /* supports ECC */
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#define BSD_D_BADSECT 0x04 /* supports bad sector forw. */
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#define BSD_D_RAMDISK 0x08 /* disk emulator */
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#define BSD_D_CHAIN 0x10 /* can do back-back transfers */
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#define BSD_D_DOSPART 0x20 /* within MSDOS partition */
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