Add mbr pseudo metadata handler.

To support incorpating a new bare device into a collection of arrays -
one partition each - mdadm needs a modest understanding of partition
tables.
The main needs to be able to recognise a partition table on one device
and copy it onto another.

This will be done using pseudo metadata types 'mbr' and 'gpt'.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 82 insertions, 0 deletions

diff --git a/part.h b/part.h
new file mode 100644
index 00000000..0afea33b
--- /dev/null
+++ b/part.h
@@ -0,0 +1,82 @@
+/*
+ * mdadm - manage Linux "md" devices aka RAID arrays.
+ *
+ * Copyright (C) 2010 Neil Brown <neilb@suse.de>
+ *
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *    Author: Neil Brown
+ *    Email: <neil@brown.name>
+ *
+ */
+
+/* Structure definitions ext  for MBR and GPT partition tables
+ */
+
+
+#define	MBR_SIGNATURE_MAGIC	__cpu_to_le16(0xAA55)
+#define MBR_PARTITIONS               4
+
+struct MBR_part_record {
+  __u8 bootable;
+  __u8 first_head;
+  __u8 first_sector;
+  __u8 first_cyl;
+  __u8 part_type;
+  __u8 last_head;
+  __u8 last_sector;
+  __u8 last_cyl;
+  __u32 first_sect_lba;
+  __u32 blocks_num;
+};
+
+struct MBR {
+	__u8 pad[446];
+	struct MBR_part_record parts[MBR_PARTITIONS];
+	__u16 magic;
+} __attribute__((packed));
+
+
+
+#define	GPT_SIGNATURE_MAGIC	__cpu_to_le64(0x5452415020494645ULL)
+#define MBR_GPT_PARTITION_TYPE       0xEE
+
+struct GPT_part_entry {
+	unsigned char type_guid[16];
+	unsigned char partition_guid[16];
+	__u64 starting_lba;
+	__u64 ending_lba;
+	unsigned char attr_bits[8];
+	unsigned char name[72];
+} __attribute__((packed));
+
+struct GPT {
+	__u64 magic;
+	__u32 revision;
+	__u32 header_size;
+	__u32 crc;
+	__u32 pad1;
+	__u64 current_lba;
+	__u64 backup_lba;
+	__u64 first_lba;
+	__u64 last_lba;
+	__u8 guid[16];
+	__u64 part_start;
+	__u32 part_cnt;
+	__u32 part_size;
+	__u32 part_crc;
+	__u8 pad2[420];
+} __attribute__((packed));