/* * 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: src/sys/sys/disklabel.h,v 1.49.2.7 2001/05/27 05:58:26 jkh Exp $ * $DragonFly: src/sys/sys/Attic/odisklabel.h,v 1.13 2006/03/24 18:35:33 dillon Exp $ */ #ifndef _SYS_DISKLABEL_H_ #define _SYS_DISKLABEL_H_ #ifndef _KERNEL #include #endif #include #include /* * Disk description table, see disktab(5) */ #define _PATH_DISKTAB "/etc/disktab" #define DISKTAB "/etc/disktab" /* deprecated */ /* * 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! */ #ifdef __i386__ #define LABELSECTOR 1 /* sector containing label */ #define LABELOFFSET 0 /* offset of label in sector */ #endif #ifndef LABELSECTOR #define LABELSECTOR 0 /* sector containing label */ #endif #ifndef LABELOFFSET #define LABELOFFSET 64 /* offset of label in sector */ #endif #define DISKMAGIC ((u_int32_t)0x82564557) /* The disk magic number */ #ifndef MAXPARTITIONS #define MAXPARTITIONS 16 #endif #define LABEL_PART 2 /* partition containing label */ #define RAW_PART 2 /* partition containing whole disk */ #define SWAP_PART 1 /* partition normally containing swap */ #ifndef LOCORE 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" */ /* * 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 /boot. These are returned when using * getdiskbyname(3) to retrieve the values from /etc/disktab. */ 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 /* 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 */ union { u_int16_t cpg; /* UFS: FS cylinders per group */ u_int16_t sgs; /* LFS: FS segment shift */ } __partition_u1; #define p_cpg __partition_u1.cpg #define p_sgs __partition_u1.sgs } d_partitions[MAXPARTITIONS]; /* actually may be more */ }; static 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); } #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_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 */ #ifdef DKTYPENAMES static const char *dktypenames[] = { "unknown", "SMD", "MSCP", "old DEC", "SCSI", "ESDI", "ST506", "HP-IB", "HP-FL", "type 9", "floppy", "CCD", "Vinum", "DOC2K", 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 file system */ #define FS_MSDOS 8 /* MSDOS file system */ #define FS_BSDLFS 9 /* 4.4BSD log-structured file system */ #define FS_OTHER 10 /* in use, but unknown/unsupported */ #define FS_HPFS 11 /* OS/2 high-performance file system */ #define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */ #define FS_BOOT 13 /* partition contains bootstrap */ #define FS_VINUM 14 /* Vinum drive */ #ifdef DKTYPENAMES 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", 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 */ /* * 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 */ /* * Drive data for SCSI. */ #define d_blind d_drivedata[0] #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 */ daddr_t df_startblk; int df_reg[8]; /* result */ }; /* * Structure used internally to retrieve information about a partition * on a disk. */ struct partinfo { struct disklabel *disklab; struct partition *part; }; /* * 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 */ #define DIOCGPART _IOW('d', 104, struct partinfo) /* get partition */ #define DIOCGDVIRGIN _IOR('d', 105, struct disklabel) /* get virgin label */ #define DIOCWLABEL _IOW('d', 109, int) /* write en/disable label */ #ifdef _KERNEL /* * XXX encoding of disk minor numbers, should be elsewhere. * * See for a possibly better encoding. * * "cpio -H newc" can be used to back up device files with large minor * numbers (but not ones >= 2^31). Old cpio formats and all tar formats * don't have enough bits, and cpio and tar don't notice the lossage. * There are also some sign extension bugs. */ /* 3 2 1 0 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 _________________________________________________________________ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------- | TYPE |UNIT_2 |P| SLICE | MAJOR? | UNIT |PART | ----------------------------------------------------------------- */ #define DKMAXUNIT 0x1ff /* Highest disk unit number */ #define dkmakeminor(unit, slice, part) \ (((slice) << 16) | (((unit) & 0x1e0) << 16) | \ (((unit) & 0x1f) << 3) | (part & 7) | \ ((part & 0x08) << 17)) static __inline u_int dkunitmask(void) { return (0x01e000f8); } static __inline u_int dkmakeunit(int unit) { return(dkmakeminor(unit, 0, 0)); } static __inline dev_t dkmodpart(dev_t dev, int part) { int val; if (part < 8) val = (part & 7); else val = (part & 7) | 0x100000; return (make_sub_dev(dev, (minor(dev) & ~0x100007) | val)); } static __inline dev_t dkmodslice(dev_t dev, int slice) { return (make_sub_dev(dev, (minor(dev) & ~0x0f0000) | (slice << 16))); } static __inline int dkpart(dev_t dev) { return (((minor(dev) >> 17) & 0x08) | (minor(dev) & 7)); } #define dkslice(dev) ((minor(dev) >> 16) & 0x0f) #define dktype(dev) ((minor(dev) >> 25) & 0x7f) static __inline u_int dkunit(dev_t dev) { return (((minor(dev) >> 16) & 0x1e0) | ((minor(dev) >> 3) & 0x1f)); } struct buf; struct bio; struct bio_queue_head; struct bio *bounds_check_with_label (dev_t dev, struct bio *bio, struct disklabel *lp, int wlabel); void diskerr (struct bio *bio, dev_t dev, const char *what, int pri, int donecnt, struct disklabel *lp); void disksort (struct buf *ap, struct buf *bp); char *readdisklabel (dev_t dev, struct disklabel *lp); void bioqdisksort (struct bio_queue_head *ap, struct bio *bio); int setdisklabel (struct disklabel *olp, struct disklabel *nlp, u_long openmask); int writedisklabel (dev_t dev, struct disklabel *lp); #endif /* _KERNEL */ #endif /* LOCORE */ #ifndef _KERNEL __BEGIN_DECLS struct disklabel *getdiskbyname (const char *); __END_DECLS #endif #endif /* !_SYS_DISKLABEL_H_ */