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#ifndef _FS_PT_LDM_H_
#define _FS_PT_LDM_H_
/*
* ldm - Part of the Linux-NTFS project.
*
* Copyright (C) 2001 Richard Russon <ldm@flatcap.org>
* Copyright (C) 2001 Anton Altaparmakov <antona@users.sf.net>
*
* Documentation is available at http://linux-ntfs.sf.net/ldm
*
* 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 (in the main directory of the Linux-NTFS source
* in the file COPYING); if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/types.h>
#include <asm/unaligned.h>
#include <asm/byteorder.h>
#include <linux/genhd.h>
/* Borrowed from kernel.h. */
#define LDM_PREFIX "LDM: " /* Prefix our error messages with this. */
#define LDM_CRIT KERN_CRIT LDM_PREFIX /* critical conditions */
#define LDM_ERR KERN_ERR LDM_PREFIX /* error conditions */
#define LDM_DEBUG KERN_DEBUG LDM_PREFIX /* debug-level messages */
/* Magic numbers in CPU format. */
#define MAGIC_VMDB 0x564D4442 /* VMDB */
#define MAGIC_VBLK 0x56424C4B /* VBLK */
#define MAGIC_PRIVHEAD 0x5052495648454144 /* PRIVHEAD */
#define MAGIC_TOCBLOCK 0x544F43424C4F434B /* TOCBLOCK */
/* The defined vblk types. */
#define VBLK_COMP 0x32 /* Component */
#define VBLK_PART 0x33 /* Partition */
#define VBLK_DSK1 0x34 /* Disk */
#define VBLK_DSK2 0x44 /* Disk */
#define VBLK_DGR1 0x35 /* Disk Group */
#define VBLK_DGR2 0x45 /* Disk Group */
#define VBLK_VOLU 0x51 /* Volume */
/* Other constants. */
#define LDM_BLOCKSIZE 1024 /* Size of block in bytes. */
#define LDM_DB_SIZE 2048 /* Size in sectors (= 1MiB). */
#define LDM_FIRST_PART_OFFSET 4 /* Add this to first_part_minor
to get to the first data
partition device minor. */
#define OFF_PRIVHEAD1 3 /* Offset of the first privhead
relative to the start of the
device in units of
LDM_BLOCKSIZE. */
/* Offsets to structures within the LDM Database in units of LDM_BLOCKSIZE. */
#define OFF_PRIVHEAD2 928 /* Backup private headers. */
#define OFF_PRIVHEAD3 1023
#define OFF_TOCBLOCK1 0 /* Tables of contents. */
#define OFF_TOCBLOCK2 1
#define OFF_TOCBLOCK3 1022
#define OFF_TOCBLOCK4 1023
#define OFF_VMDB 8 /* List of partitions. */
#define OFF_VBLK 9
#define WIN2K_DYNAMIC_PARTITION 0x42 /* Formerly SFS (Landis). */
#define WIN2K_EXTENDED_PARTITION 0x05 /* A standard extended
partition. */
#define TOC_BITMAP1 "config" /* Names of the two defined */
#define TOC_BITMAP2 "log" /* bitmaps in the TOCBLOCK. */
/* Most numbers we deal with are big-endian and won't be aligned. */
#define BE16(x) ((u16)be16_to_cpu(get_unaligned((u16*)(x))))
#define BE32(x) ((u32)be32_to_cpu(get_unaligned((u32*)(x))))
#define BE64(x) ((u64)be64_to_cpu(get_unaligned((u64*)(x))))
/* Borrowed from msdos.c. */
#define SYS_IND(p) (get_unaligned(&(p)->sys_ind))
#define NR_SECTS(p) ({ __typeof__((p)->nr_sects) __a = \
get_unaligned(&(p)->nr_sects); \
le32_to_cpu(__a); \
})
#define START_SECT(p) ({ __typeof__((p)->start_sect) __a = \
get_unaligned(&(p)->start_sect);\
le32_to_cpu(__a); \
})
/* In memory LDM database structures. */
#define DISK_ID_SIZE 64 /* Size in bytes. */
struct ldmdisk {
u64 obj_id;
u8 disk_id[DISK_ID_SIZE];
};
struct privhead { /* Offsets and sizes are in sectors. */
u16 ver_major;
u16 ver_minor;
u64 logical_disk_start;
u64 logical_disk_size;
u64 config_start;
u64 config_size;
u8 disk_id[DISK_ID_SIZE];
};
struct tocblock { /* We have exactly two bitmaps. */
u8 bitmap1_name[16];
u64 bitmap1_start;
u64 bitmap1_size;
/*u64 bitmap1_flags;*/
u8 bitmap2_name[16];
u64 bitmap2_start;
u64 bitmap2_size;
/*u64 bitmap2_flags;*/
};
struct vmdb {
u16 ver_major;
u16 ver_minor;
u32 vblk_size;
u32 vblk_offset;
u32 last_vblk_seq;
};
struct vblk {
u8 name[64];
u8 vblk_type;
u64 obj_id;
u64 disk_id;
u64 start_sector;
u64 num_sectors;
};
struct ldm_part {
struct list_head part_list;
unsigned long start;
unsigned long size;
};
int ldm_partition(struct gendisk *hd, struct block_device *bdev,
unsigned long first_sector, int first_part_minor);
#endif /* _FS_PT_LDM_H_ */
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