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Diffstat (limited to 'include/device/disk_status.h')
| -rw-r--r-- | include/device/disk_status.h | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/include/device/disk_status.h b/include/device/disk_status.h new file mode 100644 index 00000000..868e06ef --- /dev/null +++ b/include/device/disk_status.h @@ -0,0 +1,306 @@ +/* + * Mach Operating System + * Copyright (c) 1991,1990,1989 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ +/* + * Copyright (c) 1987, 1988 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the University of California, Berkeley. The name of the + * University may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * @(#)disklabel.h 7.10 (Berkeley) 6/27/88 + */ + +#ifndef _DISK_STATUS_H_ +#define _DISK_STATUS_H_ + +/* + * 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. + */ + +#define LABELSECTOR 0 /* sector containing label */ +#define LABELOFFSET 64 /* offset of label in sector */ +#define DISKMAGIC ((unsigned int) 0x82564557U) /* The disk magic number */ +#ifndef MAXPARTITIONS +#define MAXPARTITIONS 8 +#endif + + +#ifndef LOCORE +struct disklabel { + unsigned int d_magic; /* the magic number */ + short d_type; /* drive type */ + short d_subtype; /* controller/d_type specific */ + char d_typename[16]; /* type name, e.g. "eagle" */ + /* + * d_packname contains the pack identifier and is returned when + * the disklabel is read off the disk or in-core copy. + * d_boot0 and d_boot1 are the (optional) names of the + * primary (block 0) and secondary (block 1-15) bootstraps + * as found in /usr/mdec. These are returned when using + * getdiskbyname(3) to retrieve the values from /etc/disktab. + */ +#if defined(MACH_KERNEL) || defined(STANDALONE) + char d_packname[16]; /* pack identifier */ +#else + union { + char un_d_packname[16]; /* pack identifier */ + struct { + char *un_d_boot0; /* primary bootstrap name */ + char *un_d_boot1; /* secondary bootstrap name */ + } un_b; + } d_un; +#define d_packname d_un.un_d_packname +#define d_boot0 d_un.un_b.un_d_boot0 +#define d_boot1 d_un.un_b.un_d_boot1 +#endif /* ! MACH_KERNEL or STANDALONE */ + /* disk geometry: */ + unsigned int d_secsize; /* # of bytes per sector */ + unsigned int d_nsectors; /* # of data sectors per track */ + unsigned int d_ntracks; /* # of tracks per cylinder */ + unsigned int d_ncylinders; /* # of data cylinders per unit */ + unsigned int d_secpercyl; /* # of data sectors per cylinder */ + unsigned int 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. + */ + unsigned short d_sparespertrack; /* # of spare sectors per track */ + unsigned short d_sparespercyl; /* # of spare sectors per cylinder */ + /* + * Alternate cylinders include maintenance, replacement, + * configuration description areas, etc. + */ + unsigned int 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. + */ + unsigned short d_rpm; /* rotational speed */ + unsigned short d_interleave; /* hardware sector interleave */ + unsigned short d_trackskew; /* sector 0 skew, per track */ + unsigned short d_cylskew; /* sector 0 skew, per cylinder */ + unsigned int d_headswitch; /* head switch time, usec */ + unsigned int d_trkseek; /* track-to-track seek, usec */ + unsigned int d_flags; /* generic flags */ +#define NDDATA 5 + unsigned int d_drivedata[NDDATA]; /* drive-type specific information */ +#define NSPARE 5 + unsigned int d_spare[NSPARE]; /* reserved for future use */ + unsigned int d_magic2; /* the magic number (again) */ + unsigned short d_checksum; /* xor of data incl. partitions */ + + /* filesystem and partition information: */ + unsigned short d_npartitions; /* number of partitions in following */ + unsigned int d_bbsize; /* size of boot area at sn0, bytes */ + unsigned int d_sbsize; /* max size of fs superblock, bytes */ + struct partition { /* the partition table */ + unsigned int p_size; /* number of sectors in partition */ + unsigned int p_offset; /* starting sector */ + unsigned int p_fsize; /* filesystem basic fragment size */ + unsigned char p_fstype; /* filesystem type, see below */ + unsigned char p_frag; /* filesystem fragments per block */ + unsigned short p_cpg; /* filesystem cylinders per group */ + } d_partitions[MAXPARTITIONS+1]; /* actually may be more */ + +#if defined(alpha) && defined(MACH_KERNEL) + /* + * Disgusting hack. If this structure contains a pointer, + * as it does for non-kernel, then the compiler rounds + * the size to make it pointer-sized properly (arrays of..). + * But if I define the pointer for the kernel then instances + * of this structure better be aligned otherwise picking + * up a short might be done by too-smart compilers (GCC) with + * a load-long instruction expecting the short to be aligned. + * I bet the OSF folks stomped into this too, since they use + * the same disgusting hack below.. [whatelse can I do ??] + */ + int bugfix; +#endif +}; +#else LOCORE + /* + * offsets for asm boot files. + */ + .set d_secsize,40 + .set d_nsectors,44 + .set d_ntracks,48 + .set d_ncylinders,52 + .set d_secpercyl,56 + .set d_secperunit,60 + .set d_end_,276 /* size of disk label */ +#endif LOCORE + +/* 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_FLOPPY 10 /* floppy */ + +#ifdef DKTYPENAMES +static char *dktypenames[] = { + "unknown", + "SMD", + "MSCP", + "old DEC", + "SCSI", + "ESDI", + "type 6", + "type 7", + "type 8", + "type 9", + "floppy", + 0 +}; +#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 file system */ +#define FS_LINUXFS 8 /* Linux file system */ + +#ifdef DKTYPENAMES +static char *fstypenames[] = { + "unused", + "swap", + "Version 6", + "Version 7", + "System V", + "4.1BSD", + "Eighth Edition", + "4.2BSD", + "Linux", + 0 +}; +#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 */ + +/* + * Drive data for SMD. + */ +#define d_smdflags d_drivedata[0] +#define D_SSE 0x1 /* supports skip sectoring */ +#define d_mindist d_drivedata[1] +#define d_maxdist d_drivedata[2] +#define d_sdist d_drivedata[3] + +/* + * Drive data for ST506. + */ +#define d_precompcyl d_drivedata[0] +#define d_gap3 d_drivedata[1] /* used only when formatting */ + +/* + * IBM controller info (d_precompcyl used, too) + */ +#define d_step d_drivedata[2] + +#ifndef LOCORE +/* + * Structure used to perform a format + * or other raw operation, returning data + * and/or register values. + * Register identification and format + * are device- and driver-dependent. + */ +struct format_op { + char *df_buf; + int df_count; /* value-result */ + recnum_t df_startblk; + int df_reg[8]; /* result */ +}; + +/* + * Disk-specific ioctls. + */ + /* get and set disklabel; DIOCGPART used internally */ +#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 */ + +/* do format operation, read or write */ +#define DIOCRFORMAT _IOWR('d', 105, struct format_op) +#define DIOCWFORMAT _IOWR('d', 106, struct format_op) + +#define DIOCSSTEP _IOW('d', 107, int) /* set step rate */ +#define DIOCSRETRIES _IOW('d', 108, int) /* set # of retries */ +#define DIOCWLABEL _IOW('d', 109, int) /* write en/disable label */ + +#define DIOCSBAD _IOW('d', 110, struct dkbad) /* set kernel dkbad */ + +#endif LOCORE + +#endif /* _DISK_STATUS_H_ */ |