diff options
Diffstat (limited to 'sys/contrib/openzfs/lib/libspl/include/sys/dklabel.h')
| -rw-r--r-- | sys/contrib/openzfs/lib/libspl/include/sys/dklabel.h | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/lib/libspl/include/sys/dklabel.h b/sys/contrib/openzfs/lib/libspl/include/sys/dklabel.h new file mode 100644 index 000000000000..95faf2bb4ab3 --- /dev/null +++ b/sys/contrib/openzfs/lib/libspl/include/sys/dklabel.h @@ -0,0 +1,268 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 1990-2002 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#ifndef _SYS_DKLABEL_H +#define _SYS_DKLABEL_H + + + +#include <sys/isa_defs.h> +#include <sys/types32.h> +#include <sys/isa_defs.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Miscellaneous defines + */ +#define DKL_MAGIC 0xDABE /* magic number */ +#define FKL_MAGIC 0xff /* magic number for DOS floppies */ + +#if defined(_SUNOS_VTOC_16) +#define NDKMAP 16 /* # of logical partitions */ +#define DK_LABEL_LOC 1 /* location of disk label */ +#elif defined(_SUNOS_VTOC_8) +#define NDKMAP 8 /* # of logical partitions */ +#define DK_LABEL_LOC 0 /* location of disk label */ +#else +#error "No VTOC format defined." +#endif + +#define LEN_DKL_ASCII 128 /* length of dkl_asciilabel */ +#define LEN_DKL_VVOL 8 /* length of v_volume */ +#define DK_LABEL_SIZE 512 /* size of disk label */ +#define DK_MAX_BLOCKS 0x7fffffff /* max # of blocks handled */ + +/* + * Reserve two cylinders on SCSI disks. + * One is for the backup disk label and the other is for the deviceid. + * + * IPI disks only reserve one cylinder, but they will go away soon. + * CDROMs do not reserve any cylinders. + */ +#define DK_ACYL 2 + +/* + * Format of a Sun disk label. + * Resides in cylinder 0, head 0, sector 0. + * + * sizeof (struct dk_label) should be 512 (the current sector size), + * but should the sector size increase, this structure should remain + * at the beginning of the sector. + */ + +/* + * partition headers: section 1 + * Returned in struct dk_allmap by ioctl DKIOC[SG]APART (dkio(7I)) + */ +struct dk_map { + uint64_t dkl_cylno; /* starting cylinder */ + uint64_t dkl_nblk; /* number of blocks; if == 0, */ + /* partition is undefined */ +}; + +/* + * partition headers: section 1 + * Fixed size for on-disk dk_label + */ +struct dk_map32 { + daddr32_t dkl_cylno; /* starting cylinder */ + daddr32_t dkl_nblk; /* number of blocks; if == 0, */ + /* partition is undefined */ +}; + +/* + * partition headers: section 2, + * brought over from AT&T SVr4 vtoc structure. + */ +struct dk_map2 { + uint16_t p_tag; /* ID tag of partition */ + uint16_t p_flag; /* permission flag */ +}; + +struct dkl_partition { + uint16_t p_tag; /* ID tag of partition */ + uint16_t p_flag; /* permission flags */ + daddr32_t p_start; /* start sector no of partition */ + int32_t p_size; /* # of blocks in partition */ +}; + + +/* + * VTOC inclusions from AT&T SVr4 + * Fixed sized types for on-disk VTOC + */ + +struct dk_vtoc { +#if defined(_SUNOS_VTOC_16) + uint32_t v_bootinfo[3]; /* info for mboot (unsupported) */ + uint32_t v_sanity; /* to verify vtoc sanity */ + uint32_t v_version; /* layout version */ + char v_volume[LEN_DKL_VVOL]; /* volume name */ + uint16_t v_sectorsz; /* sector size in bytes */ + uint16_t v_nparts; /* number of partitions */ + uint32_t v_reserved[10]; /* free space */ + struct dkl_partition v_part[NDKMAP]; /* partition headers */ + time32_t timestamp[NDKMAP]; /* partition timestamp (unsupported) */ + char v_asciilabel[LEN_DKL_ASCII]; /* for compatibility */ +#elif defined(_SUNOS_VTOC_8) + uint32_t v_version; /* layout version */ + char v_volume[LEN_DKL_VVOL]; /* volume name */ + uint16_t v_nparts; /* number of partitions */ + struct dk_map2 v_part[NDKMAP]; /* partition hdrs, sec 2 */ + uint32_t v_bootinfo[3]; /* info needed by mboot */ + uint32_t v_sanity; /* to verify vtoc sanity */ + uint32_t v_reserved[10]; /* free space */ + time32_t v_timestamp[NDKMAP]; /* partition timestamp */ +#else +#error "No VTOC format defined." +#endif +}; + +/* + * define the amount of disk label padding needed to make + * the entire structure occupy 512 bytes. + */ +#if defined(_SUNOS_VTOC_16) +#define LEN_DKL_PAD (DK_LABEL_SIZE - \ + ((sizeof (struct dk_vtoc) + \ + (4 * sizeof (uint32_t)) + \ + (12 * sizeof (uint16_t)) + \ + (2 * (sizeof (uint16_t)))))) +#elif defined(_SUNOS_VTOC_8) +#define LEN_DKL_PAD (DK_LABEL_SIZE \ + - ((LEN_DKL_ASCII) + \ + (sizeof (struct dk_vtoc)) + \ + (sizeof (struct dk_map32) * NDKMAP) + \ + (14 * (sizeof (uint16_t))) + \ + (2 * (sizeof (uint16_t))))) +#else +#error "No VTOC format defined." +#endif + + +struct dk_label { +#if defined(_SUNOS_VTOC_16) + struct dk_vtoc dkl_vtoc; /* vtoc inclusions from AT&T SVr4 */ + uint32_t dkl_pcyl; /* # of physical cylinders */ + uint32_t dkl_ncyl; /* # of data cylinders */ + uint16_t dkl_acyl; /* # of alternate cylinders */ + uint16_t dkl_bcyl; /* cyl offset (for fixed head area) */ + uint32_t dkl_nhead; /* # of heads */ + uint32_t dkl_nsect; /* # of data sectors per track */ + uint16_t dkl_intrlv; /* interleave factor */ + uint16_t dkl_skew; /* skew factor */ + uint16_t dkl_apc; /* alternates per cyl (SCSI only) */ + uint16_t dkl_rpm; /* revolutions per minute */ + uint16_t dkl_write_reinstruct; /* # sectors to skip, writes */ + uint16_t dkl_read_reinstruct; /* # sectors to skip, reads */ + uint16_t dkl_extra[4]; /* for compatible expansion */ + char dkl_pad[LEN_DKL_PAD]; /* unused part of 512 bytes */ +#elif defined(_SUNOS_VTOC_8) + char dkl_asciilabel[LEN_DKL_ASCII]; /* for compatibility */ + struct dk_vtoc dkl_vtoc; /* vtoc inclusions from AT&T SVr4 */ + uint16_t dkl_write_reinstruct; /* # sectors to skip, writes */ + uint16_t dkl_read_reinstruct; /* # sectors to skip, reads */ + char dkl_pad[LEN_DKL_PAD]; /* unused part of 512 bytes */ + uint16_t dkl_rpm; /* rotations per minute */ + uint16_t dkl_pcyl; /* # physical cylinders */ + uint16_t dkl_apc; /* alternates per cylinder */ + uint16_t dkl_obs1; /* obsolete */ + uint16_t dkl_obs2; /* obsolete */ + uint16_t dkl_intrlv; /* interleave factor */ + uint16_t dkl_ncyl; /* # of data cylinders */ + uint16_t dkl_acyl; /* # of alternate cylinders */ + uint16_t dkl_nhead; /* # of heads in this partition */ + uint16_t dkl_nsect; /* # of 512 byte sectors per track */ + uint16_t dkl_obs3; /* obsolete */ + uint16_t dkl_obs4; /* obsolete */ + struct dk_map32 dkl_map[NDKMAP]; /* logical partition headers */ +#else +#error "No VTOC format defined." +#endif + uint16_t dkl_magic; /* identifies this label format */ + uint16_t dkl_cksum; /* xor checksum of sector */ +}; + +#if defined(_SUNOS_VTOC_16) +#define dkl_asciilabel dkl_vtoc.v_asciilabel +#define v_timestamp timestamp + +#elif defined(_SUNOS_VTOC_8) + +/* + * These defines are for historic compatibility with old drivers. + */ +#define dkl_gap1 dkl_obs1 /* used to be gap1 */ +#define dkl_gap2 dkl_obs2 /* used to be gap2 */ +#define dkl_bhead dkl_obs3 /* used to be label head offset */ +#define dkl_ppart dkl_obs4 /* used to by physical partition */ +#else +#error "No VTOC format defined." +#endif + +struct fk_label { /* DOS floppy label */ + uchar_t fkl_type; + uchar_t fkl_magich; + uchar_t fkl_magicl; + uchar_t filler; +}; + +/* + * Layout of stored fabricated device id (on-disk) + */ +#define DK_DEVID_BLKSIZE (512) +#define DK_DEVID_SIZE (DK_DEVID_BLKSIZE - ((sizeof (uchar_t) * 7))) +#define DK_DEVID_REV_MSB (0) +#define DK_DEVID_REV_LSB (1) + +struct dk_devid { + uchar_t dkd_rev_hi; /* revision (MSB) */ + uchar_t dkd_rev_lo; /* revision (LSB) */ + uchar_t dkd_flags; /* flags (not used yet) */ + uchar_t dkd_devid[DK_DEVID_SIZE]; /* devid stored here */ + uchar_t dkd_checksum3; /* checksum (MSB) */ + uchar_t dkd_checksum2; + uchar_t dkd_checksum1; + uchar_t dkd_checksum0; /* checksum (LSB) */ +}; + +#define DKD_GETCHKSUM(dkd) ((dkd)->dkd_checksum3 << 24) + \ + ((dkd)->dkd_checksum2 << 16) + \ + ((dkd)->dkd_checksum1 << 8) + \ + ((dkd)->dkd_checksum0) + +#define DKD_FORMCHKSUM(c, dkd) (dkd)->dkd_checksum3 = hibyte(hiword((c))); \ + (dkd)->dkd_checksum2 = lobyte(hiword((c))); \ + (dkd)->dkd_checksum1 = hibyte(loword((c))); \ + (dkd)->dkd_checksum0 = lobyte(loword((c))); +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_DKLABEL_H */ |