190 lines
7.5 KiB
C
190 lines
7.5 KiB
C
/*
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File: bsd.h
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Copyright (C) 1998-2004,2006,2008 Christophe GRENIER <grenier@cgsecurity.org>
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This software is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write the Free Software Foundation, Inc., 51
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Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* Come mainly from sys/disklabel.h and disktab.h */
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#ifndef _BSD_H
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#define _BSD_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* BSD_DISKLABEL_SIZE is 276 */
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#define BSD_DISKLABEL_SIZE 512
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#define STANDALONE
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#define BBSIZE 8192 /* size of boot area, with label */
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#ifdef __i386__
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#define LABELSECTOR 1 /* sector containing label */
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#define LABELOFFSET 0 /* offset of label in sector */
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#endif
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#ifndef LABELSECTOR
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#define LABELSECTOR 0 /* sector containing label */
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#endif
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#ifndef LABELOFFSET
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#define LABELOFFSET 64 /* offset of label in sector */
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#endif
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#define DISKMAGIC ((uint32_t)0x82564557) /* The disk magic number */
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#define LABEL_PART 2 /* partition containing label */
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#define RAW_PART 2 /* partition containing whole disk */
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#define SWAP_PART 1 /* partition normally containing swap */
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struct disklabel {
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uint32_t d_magic; /* the magic number */
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uint16_t d_type; /* drive type */
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uint16_t d_subtype; /* controller/d_type specific */
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char d_typename[16]; /* type name, e.g. "eagle" */
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/*
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* d_packname contains the pack identifier and is returned when
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* the disklabel is read off the disk or in-core copy.
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* d_boot0 and d_boot1 are the (optional) names of the
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* primary (block 0) and secondary (block 1-15) bootstraps
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* as found in /usr/mdec. These are returned when using
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* getdiskbyname(3) to retrieve the values from /etc/disktab.
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*/
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#if defined(KERNEL) || defined(STANDALONE)
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char d_packname[16]; /* pack identifier */
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#else
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union {
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char un_d_packname[16]; /* pack identifier */
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struct {
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char *un_d_boot0; /* primary bootstrap name */
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char *un_d_boot1; /* secondary bootstrap name */
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} un_b;
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} d_un;
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#define d_packname d_un.un_d_packname
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#define d_boot0 d_un.un_b.un_d_boot0
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#define d_boot1 d_un.un_b.un_d_boot1
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#endif /* ! KERNEL or STANDALONE */
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/* disk geometry: */
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uint32_t d_secsize; /* # of bytes per sector */
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uint32_t d_nsectors; /* # of data sectors per track */
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uint32_t d_ntracks; /* # of tracks per cylinder */
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uint32_t d_ncylinders; /* # of data cylinders per unit */
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uint32_t d_secpercyl; /* # of data sectors per cylinder */
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uint32_t d_secperunit; /* # of data sectors per unit */
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/*
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* Spares (bad sector replacements) below are not counted in
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* d_nsectors or d_secpercyl. Spare sectors are assumed to
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* be physical sectors which occupy space at the end of each
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* track and/or cylinder.
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*/
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uint16_t d_sparespertrack; /* # of spare sectors per track */
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uint16_t d_sparespercyl; /* # of spare sectors per cylinder */
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/*
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* Alternate cylinders include maintenance, replacement, configuration
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* description areas, etc.
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*/
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uint32_t d_acylinders; /* # of alt. cylinders per unit */
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/* hardware characteristics: */
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/*
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* d_interleave, d_trackskew and d_cylskew describe perturbations
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* in the media format used to compensate for a slow controller.
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* Interleave is physical sector interleave, set up by the
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* formatter or controller when formatting. When interleaving is
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* in use, logically adjacent sectors are not physically
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* contiguous, but instead are separated by some number of
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* sectors. It is specified as the ratio of physical sectors
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* traversed per logical sector. Thus an interleave of 1:1
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* implies contiguous layout, while 2:1 implies that logical
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* sector 0 is separated by one sector from logical sector 1.
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* d_trackskew is the offset of sector 0 on track N relative to
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* sector 0 on track N-1 on the same cylinder. Finally, d_cylskew
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* is the offset of sector 0 on cylinder N relative to sector 0
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* on cylinder N-1.
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*/
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uint16_t d_rpm; /* rotational speed */
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uint16_t d_interleave; /* hardware sector interleave */
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uint16_t d_trackskew; /* sector 0 skew, per track */
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uint16_t d_cylskew; /* sector 0 skew, per cylinder */
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uint32_t d_headswitch; /* head switch time, usec */
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uint32_t d_trkseek; /* track-to-track seek, usec */
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uint32_t d_flags; /* generic flags */
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#define NDDATA 5
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uint32_t d_drivedata[NDDATA]; /* drive-type specific information */
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#define NSPARE 5
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uint32_t d_spare[NSPARE]; /* reserved for future use */
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uint32_t d_magic2; /* the magic number (again) */
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uint16_t d_checksum; /* xor of data incl. partitions */
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/* filesystem and partition information: */
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uint16_t d_npartitions; /* number of partitions in following */
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uint32_t d_bbsize; /* size of boot area at sn0, bytes */
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uint32_t d_sbsize; /* max size of fs superblock, bytes */
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struct partition { /* the partition table */
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uint32_t p_size; /* number of sectors in partition */
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uint32_t p_offset; /* starting sector */
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uint32_t p_fsize; /* filesystem basic fragment size */
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uint8_t p_fstype; /* filesystem type, see below */
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uint8_t p_frag; /* filesystem fragments per block */
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union {
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uint16_t cpg; /* UFS: FS cylinders per group */
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uint16_t sgs; /* LFS: FS segment shift */
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} __partition_u1;
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#define p_cpg __partition_u1.cpg
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#define p_sgs __partition_u1.sgs
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} d_partitions[OPENBSD_MAXPARTITIONS]; /* actually may be more */
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};
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#define TST_FS_UNUSED 0 /* unused */
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#define TST_FS_SWAP 1 /* swap */
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#define TST_FS_V6 2 /* Sixth Edition */
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#define TST_FS_V7 3 /* Seventh Edition */
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#define TST_FS_SYSV 4 /* System V */
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#define TST_FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */
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#define TST_FS_V8 6 /* Eighth Edition, 4K blocks */
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#define TST_FS_BSDFFS 7 /* 4.2BSD fast filesystem */
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#define TST_FS_MSDOS 8 /* MSDOS filesystem */
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#define TST_FS_BSDLFS 9 /* 4.4BSD log-structured filesystem */
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#define TST_FS_OTHER 10 /* in use, but unknown/unsupported */
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#define TST_FS_HPFS 11 /* OS/2 high-performance filesystem */
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#define TST_FS_ISO9660 12 /* ISO 9660, normally CD-ROM */
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#define TST_FS_BOOT 13 /* partition contains bootstrap */
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#define TST_FS_VINUM 14 /* Vinum drive */
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#define TST_FS_RAID 15 /* RAIDFrame drive */
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#define TST_FS_JFS2 21 /* IBM JFS2 */
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/*@
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@ requires \valid(disk_car);
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@ requires \valid(partition);
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@ requires separation: \separated(disk_car, partition);
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@*/
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int check_BSD(disk_t *disk_car, partition_t *partition, const int verbose, const unsigned int max_partitions);
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/*@
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@ requires \valid_read(disk_car);
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@ requires \valid_read(bsd_header);
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@ requires \valid(partition);
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@ requires separation: \separated(disk_car, bsd_header, partition);
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@*/
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int recover_BSD(const disk_t *disk_car, const struct disklabel*bsd_header, partition_t *partition, const int verbose, const int dump_ind);
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#ifdef __cplusplus
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} /* closing brace for extern "C" */
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#endif
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#endif
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