- 根目录:
- fs
- partitions
- ldm.h
/**
* 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_ */