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authorMarcel Moolenaar <marcel@FreeBSD.org>2016-10-07 15:42:20 +0000
committerMarcel Moolenaar <marcel@FreeBSD.org>2016-10-07 15:42:20 +0000
commit0974f66d0647384e6489f2ba47bcec2f9c2d47de (patch)
treec3645e331fdeed530d3e126c13e5ea9a09cecf49 /sys/sys/disk/bsd.h
parente10037df2c438d4975ff0f24df9b3ad4edc464f0 (diff)
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In order to allow mkimg(1) (and other tools) to become a build tool
that can be compiled on various OSes (including on older versions of FreeBSD), make it possible to have it include the partitioning scheme definitions without pulling in FreeBSD specifics. In particular this means: o move the scheme definitions iand related defines to header files under sys/disk, o make them (more) portable by using uint#_t (where applicable) and renaming defines so that they at least have a good prefix, o make the new headers stand-alone so that they don't need FreeBSD definitions, like struct uuid(*) o keep the original headers for compatibility, but rewrite them to get the scheme definitions from <sys/disk/$scheme.h>. (*) since UUID/GUID type definitions are non-portable and the GPT scheme uses them, make it possible to have the scheme definitions use an external type by allowing consumers of the header to set GPT_UUID_TYPE. When GPT_UUID_TYPE has not been defined, the header will use it's own type definition, which is the same as struct uuid. The gpt_uuid_t typedef is created to abstract the details and allows consumers to refer to a single type. There is not conflict between the partitioning scheme headers and what is defined in them. All headers can be included in the same source files. Note: consumers of the old headers have not been changed yet. Such will be done if and when needed/beneficial. Reviewed by: imp, jhb MFC after: 1 month Sponsored by: Bracket Computing
Notes
Notes: svn path=/head/; revision=306811
Diffstat (limited to 'sys/sys/disk/bsd.h')
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1 files changed, 191 insertions, 0 deletions
diff --git a/sys/sys/disk/bsd.h b/sys/sys/disk/bsd.h
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+++ b/sys/sys/disk/bsd.h
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+/*-
+ * 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.
+ * 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
+ * $FreeBSD$
+ */
+
+#ifndef _SYS_DISK_BSD_H_
+#define _SYS_DISK_BSD_H_
+
+/* The disk magic number */
+#define BSD_MAGIC 0x82564557U
+
+#define BSD_NPARTS_MIN 8
+#define BSD_NPARTS_MAX 20
+
+/* Size of bootblock area in sector-size neutral bytes */
+#define BSD_BOOTBLOCK_SIZE 8192
+
+/* partition containing whole disk */
+#define BSD_PART_RAW 2
+
+/* partition normally containing swap */
+#define BSD_PART_SWAP 1
+
+/* Drive-type specific data size (in number of 32-bit inegrals) */
+#define BSD_NDRIVEDATA 5
+
+/* Number of spare 32-bit integrals following drive-type data */
+#define BSD_NSPARE 5
+
+struct disklabel {
+ uint32_t d_magic; /* the magic number */
+ uint16_t d_type; /* drive type */
+ uint16_t d_subtype; /* controller/d_type specific */
+ char d_typename[16]; /* type name, e.g. "eagle" */
+
+ char d_packname[16]; /* pack identifier */
+
+ /* disk geometry: */
+ uint32_t d_secsize; /* # of bytes per sector */
+ uint32_t d_nsectors; /* # of data sectors per track */
+ uint32_t d_ntracks; /* # of tracks per cylinder */
+ uint32_t d_ncylinders; /* # of data cylinders per unit */
+ uint32_t d_secpercyl; /* # of data sectors per cylinder */
+ uint32_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.
+ */
+ uint16_t d_sparespertrack; /* # of spare sectors per track */
+ uint16_t d_sparespercyl; /* # of spare sectors per cylinder */
+ /*
+ * Alternate cylinders include maintenance, replacement, configuration
+ * description areas, etc.
+ */
+ uint32_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.
+ */
+ uint16_t d_rpm; /* rotational speed */
+ uint16_t d_interleave; /* hardware sector interleave */
+ uint16_t d_trackskew; /* sector 0 skew, per track */
+ uint16_t d_cylskew; /* sector 0 skew, per cylinder */
+ uint32_t d_headswitch; /* head switch time, usec */
+ uint32_t d_trkseek; /* track-to-track seek, usec */
+ uint32_t d_flags; /* generic flags */
+ uint32_t d_drivedata[BSD_NDRIVEDATA]; /* drive-type specific data */
+ uint32_t d_spare[BSD_NSPARE]; /* reserved for future use */
+ uint32_t d_magic2; /* the magic number (again) */
+ uint16_t d_checksum; /* xor of data incl. partitions */
+
+ /* filesystem and partition information: */
+ uint16_t d_npartitions; /* number of partitions in following */
+ uint32_t d_bbsize; /* size of boot area at sn0, bytes */
+ uint32_t d_sbsize; /* max size of fs superblock, bytes */
+ struct partition { /* the partition table */
+ uint32_t p_size; /* number of sectors in partition */
+ uint32_t p_offset; /* starting sector */
+ uint32_t p_fsize; /* filesystem basic fragment size */
+ uint8_t p_fstype; /* filesystem type, see below */
+ uint8_t p_frag; /* filesystem fragments per block */
+ uint16_t p_cpg; /* filesystem cylinders per group */
+ } d_partitions[BSD_NPARTS_MIN]; /* actually may be more */
+};
+#ifdef CTASSERT
+CTASSERT(sizeof(struct disklabel) == 148 + BSD_NPARTS_MIN * 16);
+#endif
+
+/* 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 */
+
+/*
+ * 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) */
+
+/*
+ * 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 */
+
+#endif /* !_SYS_DISK_BSD_H_ */