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Release 4.11 block/partitions/ldm.h

Directory: block/partitions
/**
 * 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/doku.php?id=downloads 
 *
 * 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_ */


Overall Contributors

PersonTokensPropCommitsCommitProp
Richard Russon34859.59%111.11%
Linus Torvalds22939.21%333.33%
Dave Jones20.34%111.11%
Anton Altaparmakov20.34%222.22%
Al Viro20.34%111.11%
Justin P. Mattock10.17%111.11%
Total584100.00%9100.00%
Directory: block/partitions
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