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authorbigbiff bigbiff <bigbiff@teamw.in>2013-02-23 02:55:50 +0100
committerbigbiff bigbiff <bigbiff@teamw.in>2013-02-25 15:06:46 +0100
commite60683a0d553b6488c564863f4e48954944fb0f8 (patch)
tree9364f97cb88b7c1359f5f06dfb32150a78168c31 /libblkid/unixware.c
parentFix building of updater for 4.2 environment (diff)
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Diffstat (limited to '')
-rw-r--r--libblkid/unixware.c194
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 }
+ }
+};
+