text: /**
   * ldm - Part of the Linux-NTFS project.
   *
   * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>
   * Copyright (c) 2001-2007 Anton Altaparmakov
   * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
   *
   * Documentation is available at http://www.linux-ntfs.org/content/view/19/37/
   *
   * 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
   */
  
  #ifndef _FS_PT_LDM_H_
  #define _FS_PT_LDM_H_
  
  #include <linux/types.h>
  #include <linux/list.h>
  #include <linux/genhd.h>
  #include <linux/fs.h>
  #include <asm/unaligned.h>
  #include <asm/byteorder.h>
  
  struct parsed_partitions;
  
  /* Magic numbers in CPU format. */
  #define MAGIC_VMDB	0x564D4442		/* VMDB */
  #define MAGIC_VBLK	0x56424C4B		/* VBLK */
  #define MAGIC_PRIVHEAD	0x5052495648454144ULL	/* PRIVHEAD */
  #define MAGIC_TOCBLOCK	0x544F43424C4F434BULL	/* TOCBLOCK */
  
  /* The defined vblk types. */
  #define VBLK_VOL5		0x51		/* Volume,     version 5 */
  #define VBLK_CMP3		0x32		/* Component,  version 3 */
  #define VBLK_PRT3		0x33		/* Partition,  version 3 */
  #define VBLK_DSK3		0x34		/* Disk,       version 3 */
  #define VBLK_DSK4		0x44		/* Disk,       version 4 */
  #define VBLK_DGR3		0x35		/* Disk Group, version 3 */
  #define VBLK_DGR4		0x45		/* Disk Group, version 4 */
  
  /* vblk flags indicating extra information will be present */
  #define	VBLK_FLAG_COMP_STRIPE	0x10
  #define	VBLK_FLAG_PART_INDEX	0x08
  #define	VBLK_FLAG_DGR3_IDS	0x08
  #define	VBLK_FLAG_DGR4_IDS	0x08
  #define	VBLK_FLAG_VOLU_ID1	0x08
  #define	VBLK_FLAG_VOLU_ID2	0x20
  #define	VBLK_FLAG_VOLU_SIZE	0x80
  #define	VBLK_FLAG_VOLU_DRIVE	0x02
  
  /* size of a vblk's static parts */
  #define VBLK_SIZE_HEAD		16
  #define VBLK_SIZE_CMP3		22		/* Name and version */
  #define VBLK_SIZE_DGR3		12
  #define VBLK_SIZE_DGR4		44
  #define VBLK_SIZE_DSK3		12
  #define VBLK_SIZE_DSK4		45
  #define VBLK_SIZE_PRT3		28
  #define VBLK_SIZE_VOL5		58
  
  /* component types */
  #define COMP_STRIPE		0x01		/* Stripe-set */
  #define COMP_BASIC		0x02		/* Basic disk */
  #define COMP_RAID		0x03		/* Raid-set */
  
  /* Other constants. */
  #define LDM_DB_SIZE		2048		/* Size in sectors (= 1MiB). */
  
  #define OFF_PRIV1		6		/* Offset of the first privhead
  						   relative to the start of the
  						   device in sectors */
  
  /* Offsets to structures within the LDM Database in sectors. */
  #define OFF_PRIV2		1856		/* Backup private headers. */
  #define OFF_PRIV3		2047
  
  #define OFF_TOCB1		1		/* Tables of contents. */
  #define OFF_TOCB2		2
  #define OFF_TOCB3		2045
  #define OFF_TOCB4		2046
  
  #define OFF_VMDB		17		/* List of partitions. */
  
  #define LDM_PARTITION		0x42		/* Formerly SFS (Landis). */
  
  #define TOC_BITMAP1		"config"	/* Names of the two defined */
  #define TOC_BITMAP2		"log"		/* bitmaps in the TOCBLOCK. */
  
  /* Borrowed from msdos.c */
  #define SYS_IND(p)		(get_unaligned(&(p)->sys_ind))
  
  struct frag {				/* VBLK Fragment handling */
  	struct list_head list;
  	u32		group;
  	u8		num;		/* Total number of records */
  	u8		rec;		/* This is record number n */
  	u8		map;		/* Which portions are in use */
  	u8		data[0];
  };
  
  /* In memory LDM database structures. */
  
  #define GUID_SIZE		16
  
  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[GUID_SIZE];
  };
  
  struct tocblock {			/* We have exactly two bitmaps. */
  	u8	bitmap1_name[16];
  	u64	bitmap1_start;
  	u64	bitmap1_size;
  	u8	bitmap2_name[16];
  	u64	bitmap2_start;
  	u64	bitmap2_size;
  };
  
  struct vmdb {				/* VMDB: The database header */
  	u16	ver_major;
  	u16	ver_minor;
  	u32	vblk_size;
  	u32	vblk_offset;
  	u32	last_vblk_seq;
  };
  
  struct vblk_comp {			/* VBLK Component */
  	u8	state[16];
  	u64	parent_id;
  	u8	type;
  	u8	children;
  	u16	chunksize;
  };
  
  struct vblk_dgrp {			/* VBLK Disk Group */
  	u8	disk_id[64];
  };
  
  struct vblk_disk {			/* VBLK Disk */
  	u8	disk_id[GUID_SIZE];
  	u8	alt_name[128];
  };
  
  struct vblk_part {			/* VBLK Partition */
  	u64	start;
  	u64	size;			/* start, size and vol_off in sectors */
  	u64	volume_offset;
  	u64	parent_id;
  	u64	disk_id;
  	u8	partnum;
  };
  
  struct vblk_volu {			/* VBLK Volume */
  	u8	volume_type[16];
  	u8	volume_state[16];
  	u8	guid[16];
  	u8	drive_hint[4];
  	u64	size;
  	u8	partition_type;
  };
  
  struct vblk_head {			/* VBLK standard header */
  	u32 group;
  	u16 rec;
  	u16 nrec;
  };
  
  struct vblk {				/* Generalised VBLK */
  	u8	name[64];
  	u64	obj_id;
  	u32	sequence;
  	u8	flags;
  	u8	type;
  	union {
  		struct vblk_comp comp;
  		struct vblk_dgrp dgrp;
  		struct vblk_disk disk;
  		struct vblk_part part;
  		struct vblk_volu volu;
  	} vblk;
  	struct list_head list;
  };
  
  struct ldmdb {				/* Cache of the database */
  	struct privhead ph;
  	struct tocblock toc;
  	struct vmdb     vm;
  	struct list_head v_dgrp;
  	struct list_head v_disk;
  	struct list_head v_volu;
  	struct list_head v_comp;
  	struct list_head v_part;
  };
  
  int ldm_partition(struct parsed_partitions *state);
  
  #endif /* _FS_PT_LDM_H_ */
  
  