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9530eb64e0
Sponsored-by: https://despairlabs.com/sponsor/ Signed-off-by: Rob Norris <robn@despairlabs.com> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
269 lines
8.4 KiB
C
269 lines
8.4 KiB
C
// SPDX-License-Identifier: CDDL-1.0
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 1990-2002 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _SYS_DKLABEL_H
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#define _SYS_DKLABEL_H
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#include <sys/isa_defs.h>
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#include <sys/types32.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Miscellaneous defines
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*/
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#define DKL_MAGIC 0xDABE /* magic number */
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#define FKL_MAGIC 0xff /* magic number for DOS floppies */
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#if defined(_SUNOS_VTOC_16)
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#define NDKMAP 16 /* # of logical partitions */
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#define DK_LABEL_LOC 1 /* location of disk label */
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#elif defined(_SUNOS_VTOC_8)
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#define NDKMAP 8 /* # of logical partitions */
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#define DK_LABEL_LOC 0 /* location of disk label */
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#else
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#error "No VTOC format defined."
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#endif
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#define LEN_DKL_ASCII 128 /* length of dkl_asciilabel */
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#define LEN_DKL_VVOL 8 /* length of v_volume */
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#define DK_LABEL_SIZE 512 /* size of disk label */
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#define DK_MAX_BLOCKS 0x7fffffff /* max # of blocks handled */
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/*
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* Reserve two cylinders on SCSI disks.
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* One is for the backup disk label and the other is for the deviceid.
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*
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* IPI disks only reserve one cylinder, but they will go away soon.
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* CDROMs do not reserve any cylinders.
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*/
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#define DK_ACYL 2
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/*
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* Format of a Sun disk label.
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* Resides in cylinder 0, head 0, sector 0.
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*
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* sizeof (struct dk_label) should be 512 (the current sector size),
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* but should the sector size increase, this structure should remain
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* at the beginning of the sector.
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*/
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/*
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* partition headers: section 1
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* Returned in struct dk_allmap by ioctl DKIOC[SG]APART (dkio(7I))
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*/
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struct dk_map {
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uint64_t dkl_cylno; /* starting cylinder */
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uint64_t dkl_nblk; /* number of blocks; if == 0, */
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/* partition is undefined */
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};
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/*
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* partition headers: section 1
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* Fixed size for on-disk dk_label
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*/
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struct dk_map32 {
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daddr32_t dkl_cylno; /* starting cylinder */
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daddr32_t dkl_nblk; /* number of blocks; if == 0, */
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/* partition is undefined */
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};
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/*
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* partition headers: section 2,
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* brought over from AT&T SVr4 vtoc structure.
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*/
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struct dk_map2 {
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uint16_t p_tag; /* ID tag of partition */
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uint16_t p_flag; /* permission flag */
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};
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struct dkl_partition {
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uint16_t p_tag; /* ID tag of partition */
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uint16_t p_flag; /* permission flags */
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daddr32_t p_start; /* start sector no of partition */
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int32_t p_size; /* # of blocks in partition */
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};
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/*
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* VTOC inclusions from AT&T SVr4
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* Fixed sized types for on-disk VTOC
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*/
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struct dk_vtoc {
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#if defined(_SUNOS_VTOC_16)
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uint32_t v_bootinfo[3]; /* info for mboot (unsupported) */
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uint32_t v_sanity; /* to verify vtoc sanity */
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uint32_t v_version; /* layout version */
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char v_volume[LEN_DKL_VVOL]; /* volume name */
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uint16_t v_sectorsz; /* sector size in bytes */
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uint16_t v_nparts; /* number of partitions */
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uint32_t v_reserved[10]; /* free space */
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struct dkl_partition v_part[NDKMAP]; /* partition headers */
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time32_t timestamp[NDKMAP]; /* partition timestamp (unsupported) */
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char v_asciilabel[LEN_DKL_ASCII]; /* for compatibility */
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#elif defined(_SUNOS_VTOC_8)
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uint32_t v_version; /* layout version */
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char v_volume[LEN_DKL_VVOL]; /* volume name */
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uint16_t v_nparts; /* number of partitions */
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struct dk_map2 v_part[NDKMAP]; /* partition hdrs, sec 2 */
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uint32_t v_bootinfo[3]; /* info needed by mboot */
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uint32_t v_sanity; /* to verify vtoc sanity */
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uint32_t v_reserved[10]; /* free space */
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time32_t v_timestamp[NDKMAP]; /* partition timestamp */
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#else
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#error "No VTOC format defined."
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#endif
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};
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/*
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* define the amount of disk label padding needed to make
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* the entire structure occupy 512 bytes.
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*/
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#if defined(_SUNOS_VTOC_16)
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#define LEN_DKL_PAD (DK_LABEL_SIZE - \
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((sizeof (struct dk_vtoc) + \
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(4 * sizeof (uint32_t)) + \
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(12 * sizeof (uint16_t)) + \
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(2 * (sizeof (uint16_t))))))
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#elif defined(_SUNOS_VTOC_8)
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#define LEN_DKL_PAD (DK_LABEL_SIZE \
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- ((LEN_DKL_ASCII) + \
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(sizeof (struct dk_vtoc)) + \
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(sizeof (struct dk_map32) * NDKMAP) + \
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(14 * (sizeof (uint16_t))) + \
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(2 * (sizeof (uint16_t)))))
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#else
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#error "No VTOC format defined."
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#endif
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struct dk_label {
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#if defined(_SUNOS_VTOC_16)
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struct dk_vtoc dkl_vtoc; /* vtoc inclusions from AT&T SVr4 */
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uint32_t dkl_pcyl; /* # of physical cylinders */
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uint32_t dkl_ncyl; /* # of data cylinders */
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uint16_t dkl_acyl; /* # of alternate cylinders */
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uint16_t dkl_bcyl; /* cyl offset (for fixed head area) */
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uint32_t dkl_nhead; /* # of heads */
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uint32_t dkl_nsect; /* # of data sectors per track */
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uint16_t dkl_intrlv; /* interleave factor */
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uint16_t dkl_skew; /* skew factor */
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uint16_t dkl_apc; /* alternates per cyl (SCSI only) */
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uint16_t dkl_rpm; /* revolutions per minute */
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uint16_t dkl_write_reinstruct; /* # sectors to skip, writes */
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uint16_t dkl_read_reinstruct; /* # sectors to skip, reads */
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uint16_t dkl_extra[4]; /* for compatible expansion */
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char dkl_pad[LEN_DKL_PAD]; /* unused part of 512 bytes */
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#elif defined(_SUNOS_VTOC_8)
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char dkl_asciilabel[LEN_DKL_ASCII]; /* for compatibility */
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struct dk_vtoc dkl_vtoc; /* vtoc inclusions from AT&T SVr4 */
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uint16_t dkl_write_reinstruct; /* # sectors to skip, writes */
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uint16_t dkl_read_reinstruct; /* # sectors to skip, reads */
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char dkl_pad[LEN_DKL_PAD]; /* unused part of 512 bytes */
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uint16_t dkl_rpm; /* rotations per minute */
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uint16_t dkl_pcyl; /* # physical cylinders */
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uint16_t dkl_apc; /* alternates per cylinder */
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uint16_t dkl_obs1; /* obsolete */
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uint16_t dkl_obs2; /* obsolete */
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uint16_t dkl_intrlv; /* interleave factor */
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uint16_t dkl_ncyl; /* # of data cylinders */
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uint16_t dkl_acyl; /* # of alternate cylinders */
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uint16_t dkl_nhead; /* # of heads in this partition */
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uint16_t dkl_nsect; /* # of 512 byte sectors per track */
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uint16_t dkl_obs3; /* obsolete */
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uint16_t dkl_obs4; /* obsolete */
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struct dk_map32 dkl_map[NDKMAP]; /* logical partition headers */
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#else
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#error "No VTOC format defined."
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#endif
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uint16_t dkl_magic; /* identifies this label format */
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uint16_t dkl_cksum; /* xor checksum of sector */
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};
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#if defined(_SUNOS_VTOC_16)
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#define dkl_asciilabel dkl_vtoc.v_asciilabel
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#define v_timestamp timestamp
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#elif defined(_SUNOS_VTOC_8)
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/*
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* These defines are for historic compatibility with old drivers.
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*/
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#define dkl_gap1 dkl_obs1 /* used to be gap1 */
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#define dkl_gap2 dkl_obs2 /* used to be gap2 */
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#define dkl_bhead dkl_obs3 /* used to be label head offset */
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#define dkl_ppart dkl_obs4 /* used to by physical partition */
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#else
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#error "No VTOC format defined."
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#endif
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struct fk_label { /* DOS floppy label */
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uchar_t fkl_type;
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uchar_t fkl_magich;
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uchar_t fkl_magicl;
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uchar_t filler;
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};
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/*
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* Layout of stored fabricated device id (on-disk)
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*/
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#define DK_DEVID_BLKSIZE (512)
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#define DK_DEVID_SIZE (DK_DEVID_BLKSIZE - ((sizeof (uchar_t) * 7)))
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#define DK_DEVID_REV_MSB (0)
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#define DK_DEVID_REV_LSB (1)
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struct dk_devid {
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uchar_t dkd_rev_hi; /* revision (MSB) */
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uchar_t dkd_rev_lo; /* revision (LSB) */
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uchar_t dkd_flags; /* flags (not used yet) */
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uchar_t dkd_devid[DK_DEVID_SIZE]; /* devid stored here */
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uchar_t dkd_checksum3; /* checksum (MSB) */
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uchar_t dkd_checksum2;
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uchar_t dkd_checksum1;
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uchar_t dkd_checksum0; /* checksum (LSB) */
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};
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#define DKD_GETCHKSUM(dkd) ((dkd)->dkd_checksum3 << 24) + \
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((dkd)->dkd_checksum2 << 16) + \
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((dkd)->dkd_checksum1 << 8) + \
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((dkd)->dkd_checksum0)
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#define DKD_FORMCHKSUM(c, dkd) (dkd)->dkd_checksum3 = hibyte(hiword((c))); \
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(dkd)->dkd_checksum2 = lobyte(hiword((c))); \
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(dkd)->dkd_checksum1 = hibyte(loword((c))); \
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(dkd)->dkd_checksum0 = lobyte(loword((c)));
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_DKLABEL_H */
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