Thanos Makatos
2013-Jul-15 11:42 UTC
[PATCH RESEND] blktap3/part: Introduce partition header
This patch introduces partition structs and public functions. This file is
imported from blktap2.5. I haven''t looked thoroughly into this file, it
seems
to be used by libvhd to access partition tables inside VHD files.
Signed-off-by: Thanos Makatos <thanos.makatos@citrix.com>
diff --git a/tools/blktap3/part/partition.h b/tools/blktap3/part/partition.h
new file mode 100644
--- /dev/null
+++ b/tools/blktap3/part/partition.h
@@ -0,0 +1,45 @@
+#ifndef _PARTITION_H_
+#define _PARTITION_H_
+
+#include <inttypes.h>
+
+#define PARTITION_BOOTABLE 0x80
+#define PARTITION_NON_BOOTABLE 0x00
+
+#define MBR_SIGNATURE 0xAA55
+#define MBR_START_SECTOR 0x80
+
+struct partition_geometry {
+ unsigned char heads;
+ unsigned char sectors;
+ unsigned int cylinders;
+};
+
+struct partition_chs {
+ uint8_t chs[3];
+} __attribute__ ((__packed__));
+
+struct primary_partition {
+ uint8_t status;
+ struct partition_chs chs_first;
+ uint8_t type;
+ struct partition_chs chs_last;
+ uint32_t lba;
+ uint32_t blocks;
+} __attribute__ ((__packed__));
+
+struct partition_table {
+ uint8_t code[0x1b8];
+ uint32_t disk_signature;
+ uint8_t pad[0x2];
+ struct primary_partition partitions[4];
+ uint16_t mbr_signature;
+} __attribute__ ((__packed__));
+
+void partition_table_in(struct partition_table *);
+void partition_table_out(struct partition_table *);
+int partition_table_validate(struct partition_table *);
+void partition_table_dump(struct partition_table *);
+struct partition_chs lba_to_chs(struct partition_geometry *, uint64_t);
+
+#endif