diff options
Diffstat (limited to 'sys/sys/disklabel.h')
| -rw-r--r-- | sys/sys/disklabel.h | 170 |
1 files changed, 153 insertions, 17 deletions
diff --git a/sys/sys/disklabel.h b/sys/sys/disklabel.h index f534d5cfcba0..42c757aaf3a0 100644 --- a/sys/sys/disklabel.h +++ b/sys/sys/disklabel.h @@ -38,38 +38,115 @@ #endif #include <sys/ioccom.h> -#include <sys/disk/bsd.h> - -/* Disk description table, see disktab(5) */ +/* + * 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! - * XXX in actuality it can't even be per controller or drive. It should be - * constant/fixed across storage hardware and CPU architectures. Disks can - * travel from one machine to another and a label created on one machine - * should be detectable and understood by the other. */ + +/* XXX these should be defined per controller (or drive) elsewhere, not here! */ +#if defined(__i386__) || defined(__amd64__) || defined(__arm__) || \ + defined(__powerpc__) || defined(__mips__) #define LABELSECTOR 1 /* sector containing label */ #define LABELOFFSET 0 /* offset of label in sector */ +#endif -#define DISKMAGIC BSD_MAGIC /* The disk magic number */ - +#define DISKMAGIC ((u_int32_t)0x82564557) /* The disk magic number */ #ifndef MAXPARTITIONS -#define MAXPARTITIONS BSD_NPARTS_MIN +#define MAXPARTITIONS 8 #endif /* Size of bootblock area in sector-size neutral bytes */ -#define BBSIZE BSD_BOOTBLOCK_SIZE +#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 */ -#define LABEL_PART BSD_PART_RAW -#define RAW_PART BSD_PART_RAW -#define SWAP_PART BSD_PART_SWAP + /* 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 */ -#define NDDATA BSD_NDRIVEDATA -#define NSPARE BSD_NSPARE + /* 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 @@ -85,6 +162,23 @@ dkcksum(struct disklabel *lp) 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", @@ -109,6 +203,39 @@ static const char *dktypenames[] = { #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_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) */ + #ifdef FSTYPENAMES static const char *fstypenames[] = { "unused", @@ -148,6 +275,15 @@ static const char *fstypenames[] = { #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 */ + +/* * NB: <sys/disk.h> defines ioctls from 'd'/128 and up. */ |