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-rw-r--r--sys/sys/disklabel.h170
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.
*/