diff options
Diffstat (limited to 'libblkid/unixware.c')
| -rw-r--r-- | libblkid/unixware.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/libblkid/unixware.c b/libblkid/unixware.c new file mode 100644 index 000000000..e9bcba358 --- /dev/null +++ b/libblkid/unixware.c @@ -0,0 +1,194 @@ +/* + * unixware partition parsing code + * + * Copyright (C) 2009 Karel Zak <kzak@redhat.com> + * + * This file may be redistributed under the terms of the + * GNU Lesser General Public License. + * + * + * The intersting information about unixware PT: + * - Linux kernel / partx + * - vtoc(7) SCO UNIX command man page + * - evms source code (http://evms.sourceforge.net/) + * - vxtools source code (http://martin.hinner.info/fs/vxfs/) + */ +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <stdint.h> + +#include "partitions.h" + +/* disklabel location */ +#define UNIXWARE_SECTOR 29 +#define UNIXWARE_OFFSET (UNIXWARE_SECTOR << 9) /* offset in bytes */ +#define UNIXWARE_KBOFFSET (UNIXWARE_OFFSET >> 10) /* offset in 1024-blocks */ + +/* disklabel->d_magic offset within the last 1024 block */ +#define UNIXWARE_MAGICOFFSET (UNIXWARE_OFFSET - UNIXWARE_KBOFFSET + 4) + +#define UNIXWARE_VTOCMAGIC 0x600DDEEEUL +#define UNIXWARE_MAXPARTITIONS 16 + +/* unixware_partition->s_label flags */ +#define UNIXWARE_TAG_UNUSED 0x0000 /* unused partition */ +#define UNIXWARE_TAG_BOOT 0x0001 /* boot fs */ +#define UNIXWARE_TAG_ROOT 0x0002 /* root fs */ +#define UNIXWARE_TAG_SWAP 0x0003 /* swap fs */ +#define UNIXWARE_TAG_USER 0x0004 /* user fs */ +#define UNIXWARE_TAG_ENTIRE_DISK 0x0005 /* whole disk */ +#define UNIXWARE_TAG_ALT_S 0x0006 /* alternate sector space */ +#define UNIXWARE_TAG_OTHER 0x0007 /* non unix */ +#define UNIXWARE_TAG_ALT_T 0x0008 /* alternate track space */ +#define UNIXWARE_TAG_STAND 0x0009 /* stand partition */ +#define UNIXWARE_TAG_VAR 0x000a /* var partition */ +#define UNIXWARE_TAG_HOME 0x000b /* home partition */ +#define UNIXWARE_TAG_DUMP 0x000c /* dump partition */ +#define UNIXWARE_TAG_ALT_ST 0x000d /* alternate sector track */ +#define UNIXWARE_TAG_VM_PUBLIC 0x000e /* volume mgt public partition */ +#define UNIXWARE_TAG_VM_PRIVATE 0x000f /* volume mgt private partition */ + + +/* unixware_partition->s_flags flags */ +#define UNIXWARE_FLAG_VALID 0x0200 + +struct unixware_partition { + uint16_t s_label; /* partition label (tag) */ + uint16_t s_flags; /* permission flags */ + uint32_t start_sect; /* starting sector */ + uint32_t nr_sects; /* number of sectors */ +} __attribute__((packed)); + +struct unixware_disklabel { + uint32_t d_type; /* drive type */ + uint32_t d_magic; /* the magic number */ + uint32_t d_version; /* version number */ + char d_serial[12]; /* serial number of the device */ + uint32_t d_ncylinders; /* # of data cylinders per device */ + uint32_t d_ntracks; /* # of tracks per cylinder */ + uint32_t d_nsectors; /* # of data sectors per track */ + uint32_t d_secsize; /* # of bytes per sector */ + uint32_t d_part_start; /* # of first sector of this partition */ + uint32_t d_unknown1[12]; /* ? */ + uint32_t d_alt_tbl; /* byte offset of alternate table */ + uint32_t d_alt_len; /* byte length of alternate table */ + uint32_t d_phys_cyl; /* # of physical cylinders per device */ + uint32_t d_phys_trk; /* # of physical tracks per cylinder */ + uint32_t d_phys_sec; /* # of physical sectors per track */ + uint32_t d_phys_bytes; /* # of physical bytes per sector */ + uint32_t d_unknown2; /* ? */ + uint32_t d_unknown3; /* ? */ + uint32_t d_pad[8]; /* pad */ + + struct unixware_vtoc { + uint32_t v_magic; /* the magic number */ + uint32_t v_version; /* version number */ + char v_name[8]; /* volume name */ + uint16_t v_nslices; /* # of partitions */ + uint16_t v_unknown1; /* ? */ + uint32_t v_reserved[10]; /* reserved */ + + struct unixware_partition + v_slice[UNIXWARE_MAXPARTITIONS]; /* partition */ + } __attribute__((packed)) vtoc; +}; + +static int probe_unixware_pt(blkid_probe pr, + const struct blkid_idmag *mag __attribute__((__unused__))) +{ + struct unixware_disklabel *l; + struct unixware_partition *p; + blkid_parttable tab = NULL; + blkid_partition parent; + blkid_partlist ls; + int i; + + l = (struct unixware_disklabel *) + blkid_probe_get_sector(pr, UNIXWARE_SECTOR); + if (!l) + goto nothing; + + if (le32_to_cpu(l->vtoc.v_magic) != UNIXWARE_VTOCMAGIC) + goto nothing; + + if (blkid_partitions_need_typeonly(pr)) + /* caller does not ask for details about partitions */ + return 0; + + ls = blkid_probe_get_partlist(pr); + if (!ls) + goto err; + + parent = blkid_partlist_get_parent(ls); + + tab = blkid_partlist_new_parttable(ls, "unixware", UNIXWARE_OFFSET); + if (!tab) + goto err; + + /* Skip the first partition that describe whole disk + */ + for (i = 1, p = &l->vtoc.v_slice[1]; + i < UNIXWARE_MAXPARTITIONS; i++, p++) { + + uint32_t start, size; + uint16_t tag, flg; + blkid_partition par; + + tag = le16_to_cpu(p->s_label); + flg = le16_to_cpu(p->s_flags); + + if (tag == UNIXWARE_TAG_UNUSED || + tag == UNIXWARE_TAG_ENTIRE_DISK || + flg != UNIXWARE_FLAG_VALID) + continue; + + start = le32_to_cpu(p->start_sect); + size = le32_to_cpu(p->nr_sects); + + if (parent && !blkid_is_nested_dimension(parent, start, size)) { + DBG(DEBUG_LOWPROBE, printf( + "WARNING: unixware partition (%d) overflow " + "detected, ignore\n", i)); + continue; + } + + par = blkid_partlist_add_partition(ls, tab, start, size); + if (!par) + goto err; + + blkid_partition_set_type(par, tag); + blkid_partition_set_flags(par, flg); + } + + return 0; + +nothing: + return 1; +err: + return -1; +} + + +/* + * The unixware partition table is within primary DOS partition. The PT is + * located on 29 sector, PT magic string is d_magic member of 'struct + * unixware_disklabel'. + */ +const struct blkid_idinfo unixware_pt_idinfo = +{ + .name = "unixware", + .probefunc = probe_unixware_pt, + .minsz = 1024 * 1440 + 1, /* ignore floppies */ + .magics = + { + { + .magic = "\x0D\x60\xE5\xCA", /* little-endian magic string */ + .len = 4, /* d_magic size in bytes */ + .kboff = UNIXWARE_KBOFFSET, + .sboff = UNIXWARE_MAGICOFFSET + }, + { NULL } + } +}; + |