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* unixware partition parsing code
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* Copyright (C) 2009 Karel Zak <kzak@redhat.com>
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* This file may be redistributed under the terms of the
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* GNU Lesser General Public License.
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* The intersting information about unixware PT:
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* - Linux kernel / partx
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* - vtoc(7) SCO UNIX command man page
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* - evms source code (http://evms.sourceforge.net/)
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* - vxtools source code (http://martin.hinner.info/fs/vxfs/)
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#include "partitions.h"
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/* disklabel location */
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#define UNIXWARE_SECTOR 29
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#define UNIXWARE_OFFSET (UNIXWARE_SECTOR << 9) /* offset in bytes */
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#define UNIXWARE_KBOFFSET (UNIXWARE_OFFSET >> 10) /* offset in 1024-blocks */
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/* disklabel->d_magic offset within the last 1024 block */
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#define UNIXWARE_MAGICOFFSET (UNIXWARE_OFFSET - UNIXWARE_KBOFFSET + 4)
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#define UNIXWARE_VTOCMAGIC 0x600DDEEEUL
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#define UNIXWARE_MAXPARTITIONS 16
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/* unixware_partition->s_label flags */
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#define UNIXWARE_TAG_UNUSED 0x0000 /* unused partition */
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#define UNIXWARE_TAG_BOOT 0x0001 /* boot fs */
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#define UNIXWARE_TAG_ROOT 0x0002 /* root fs */
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#define UNIXWARE_TAG_SWAP 0x0003 /* swap fs */
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#define UNIXWARE_TAG_USER 0x0004 /* user fs */
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#define UNIXWARE_TAG_ENTIRE_DISK 0x0005 /* whole disk */
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#define UNIXWARE_TAG_ALT_S 0x0006 /* alternate sector space */
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#define UNIXWARE_TAG_OTHER 0x0007 /* non unix */
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#define UNIXWARE_TAG_ALT_T 0x0008 /* alternate track space */
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#define UNIXWARE_TAG_STAND 0x0009 /* stand partition */
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#define UNIXWARE_TAG_VAR 0x000a /* var partition */
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#define UNIXWARE_TAG_HOME 0x000b /* home partition */
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#define UNIXWARE_TAG_DUMP 0x000c /* dump partition */
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#define UNIXWARE_TAG_ALT_ST 0x000d /* alternate sector track */
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#define UNIXWARE_TAG_VM_PUBLIC 0x000e /* volume mgt public partition */
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#define UNIXWARE_TAG_VM_PRIVATE 0x000f /* volume mgt private partition */
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/* unixware_partition->s_flags flags */
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#define UNIXWARE_FLAG_VALID 0x0200
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struct unixware_partition {
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uint16_t s_label; /* partition label (tag) */
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uint16_t s_flags; /* permission flags */
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uint32_t start_sect; /* starting sector */
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uint32_t nr_sects; /* number of sectors */
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} __attribute__((packed));
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struct unixware_disklabel {
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uint32_t d_type; /* drive type */
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uint32_t d_magic; /* the magic number */
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uint32_t d_version; /* version number */
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char d_serial[12]; /* serial number of the device */
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uint32_t d_ncylinders; /* # of data cylinders per device */
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uint32_t d_ntracks; /* # of tracks per cylinder */
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uint32_t d_nsectors; /* # of data sectors per track */
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uint32_t d_secsize; /* # of bytes per sector */
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uint32_t d_part_start; /* # of first sector of this partition */
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uint32_t d_unknown1[12]; /* ? */
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uint32_t d_alt_tbl; /* byte offset of alternate table */
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uint32_t d_alt_len; /* byte length of alternate table */
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uint32_t d_phys_cyl; /* # of physical cylinders per device */
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uint32_t d_phys_trk; /* # of physical tracks per cylinder */
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uint32_t d_phys_sec; /* # of physical sectors per track */
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uint32_t d_phys_bytes; /* # of physical bytes per sector */
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uint32_t d_unknown2; /* ? */
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uint32_t d_unknown3; /* ? */
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uint32_t d_pad[8]; /* pad */
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struct unixware_vtoc {
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uint32_t v_magic; /* the magic number */
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uint32_t v_version; /* version number */
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char v_name[8]; /* volume name */
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uint16_t v_nslices; /* # of partitions */
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uint16_t v_unknown1; /* ? */
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uint32_t v_reserved[10]; /* reserved */
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struct unixware_partition
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v_slice[UNIXWARE_MAXPARTITIONS]; /* partition */
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} __attribute__((packed)) vtoc;
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static int probe_unixware_pt(blkid_probe pr,
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const struct blkid_idmag *mag __attribute__((__unused__)))
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struct unixware_disklabel *l;
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struct unixware_partition *p;
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blkid_parttable tab = NULL;
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blkid_partition parent;
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l = (struct unixware_disklabel *)
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blkid_probe_get_sector(pr, UNIXWARE_SECTOR);
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if (le32_to_cpu(l->vtoc.v_magic) != UNIXWARE_VTOCMAGIC)
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if (blkid_partitions_need_typeonly(pr))
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/* caller does not ask for details about partitions */
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ls = blkid_probe_get_partlist(pr);
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parent = blkid_partlist_get_parent(ls);
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tab = blkid_partlist_new_parttable(ls, "unixware", UNIXWARE_OFFSET);
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/* Skip the first partition that describe whole disk
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for (i = 1, p = &l->vtoc.v_slice[1];
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i < UNIXWARE_MAXPARTITIONS; i++, p++) {
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uint32_t start, size;
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tag = le16_to_cpu(p->s_label);
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flg = le16_to_cpu(p->s_flags);
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if (tag == UNIXWARE_TAG_UNUSED ||
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tag == UNIXWARE_TAG_ENTIRE_DISK ||
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flg != UNIXWARE_FLAG_VALID)
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start = le32_to_cpu(p->start_sect);
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size = le32_to_cpu(p->nr_sects);
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if (parent && !blkid_is_nested_dimension(parent, start, size)) {
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DBG(DEBUG_LOWPROBE, printf(
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"WARNING: unixware partition (%d) overflow "
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"detected, ignore\n", i));
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par = blkid_partlist_add_partition(ls, tab, start, size);
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blkid_partition_set_type(par, tag);
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blkid_partition_set_flags(par, flg);
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* The unixware partition table is within primary DOS partition. The PT is
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* located on 29 sector, PT magic string is d_magic member of 'struct
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* unixware_disklabel'.
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const struct blkid_idinfo unixware_pt_idinfo =
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.probefunc = probe_unixware_pt,
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.minsz = 1024 * 1440 + 1, /* ignore floppies */
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.magic = "\x0D\x60\xE5\xCA", /* little-endian magic string */
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.len = 4, /* d_magic size in bytes */
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.kboff = UNIXWARE_KBOFFSET,
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.sboff = UNIXWARE_MAGICOFFSET
added
removed
libblkid/src/partitions/unixware.c
