216 lines
5.5 KiB
C
216 lines
5.5 KiB
C
/**
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* ldm - Part of the Linux-NTFS project.
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*
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* Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>
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* Copyright (c) 2001-2007 Anton Altaparmakov
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* Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
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*
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* Documentation is available at http://www.linux-ntfs.org/content/view/19/37/
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (in the main directory of the Linux-NTFS source
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* in the file COPYING); if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _FS_PT_LDM_H_
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#define _FS_PT_LDM_H_
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/genhd.h>
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#include <linux/fs.h>
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#include <asm/unaligned.h>
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#include <asm/byteorder.h>
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struct parsed_partitions;
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/* Magic numbers in CPU format. */
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#define MAGIC_VMDB 0x564D4442 /* VMDB */
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#define MAGIC_VBLK 0x56424C4B /* VBLK */
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#define MAGIC_PRIVHEAD 0x5052495648454144ULL /* PRIVHEAD */
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#define MAGIC_TOCBLOCK 0x544F43424C4F434BULL /* TOCBLOCK */
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/* The defined vblk types. */
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#define VBLK_VOL5 0x51 /* Volume, version 5 */
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#define VBLK_CMP3 0x32 /* Component, version 3 */
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#define VBLK_PRT3 0x33 /* Partition, version 3 */
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#define VBLK_DSK3 0x34 /* Disk, version 3 */
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#define VBLK_DSK4 0x44 /* Disk, version 4 */
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#define VBLK_DGR3 0x35 /* Disk Group, version 3 */
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#define VBLK_DGR4 0x45 /* Disk Group, version 4 */
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/* vblk flags indicating extra information will be present */
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#define VBLK_FLAG_COMP_STRIPE 0x10
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#define VBLK_FLAG_PART_INDEX 0x08
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#define VBLK_FLAG_DGR3_IDS 0x08
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#define VBLK_FLAG_DGR4_IDS 0x08
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#define VBLK_FLAG_VOLU_ID1 0x08
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#define VBLK_FLAG_VOLU_ID2 0x20
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#define VBLK_FLAG_VOLU_SIZE 0x80
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#define VBLK_FLAG_VOLU_DRIVE 0x02
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/* size of a vblk's static parts */
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#define VBLK_SIZE_HEAD 16
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#define VBLK_SIZE_CMP3 22 /* Name and version */
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#define VBLK_SIZE_DGR3 12
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#define VBLK_SIZE_DGR4 44
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#define VBLK_SIZE_DSK3 12
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#define VBLK_SIZE_DSK4 45
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#define VBLK_SIZE_PRT3 28
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#define VBLK_SIZE_VOL5 58
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/* component types */
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#define COMP_STRIPE 0x01 /* Stripe-set */
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#define COMP_BASIC 0x02 /* Basic disk */
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#define COMP_RAID 0x03 /* Raid-set */
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/* Other constants. */
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#define LDM_DB_SIZE 2048 /* Size in sectors (= 1MiB). */
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#define OFF_PRIV1 6 /* Offset of the first privhead
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relative to the start of the
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device in sectors */
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/* Offsets to structures within the LDM Database in sectors. */
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#define OFF_PRIV2 1856 /* Backup private headers. */
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#define OFF_PRIV3 2047
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#define OFF_TOCB1 1 /* Tables of contents. */
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#define OFF_TOCB2 2
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#define OFF_TOCB3 2045
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#define OFF_TOCB4 2046
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#define OFF_VMDB 17 /* List of partitions. */
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#define LDM_PARTITION 0x42 /* Formerly SFS (Landis). */
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#define TOC_BITMAP1 "config" /* Names of the two defined */
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#define TOC_BITMAP2 "log" /* bitmaps in the TOCBLOCK. */
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/* Borrowed from msdos.c */
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#define SYS_IND(p) (get_unaligned(&(p)->sys_ind))
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struct frag { /* VBLK Fragment handling */
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struct list_head list;
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u32 group;
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u8 num; /* Total number of records */
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u8 rec; /* This is record number n */
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u8 map; /* Which portions are in use */
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u8 data[0];
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};
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/* In memory LDM database structures. */
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#define GUID_SIZE 16
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struct privhead { /* Offsets and sizes are in sectors. */
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u16 ver_major;
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u16 ver_minor;
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u64 logical_disk_start;
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u64 logical_disk_size;
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u64 config_start;
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u64 config_size;
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u8 disk_id[GUID_SIZE];
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};
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struct tocblock { /* We have exactly two bitmaps. */
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u8 bitmap1_name[16];
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u64 bitmap1_start;
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u64 bitmap1_size;
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u8 bitmap2_name[16];
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u64 bitmap2_start;
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u64 bitmap2_size;
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};
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struct vmdb { /* VMDB: The database header */
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u16 ver_major;
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u16 ver_minor;
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u32 vblk_size;
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u32 vblk_offset;
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u32 last_vblk_seq;
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};
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struct vblk_comp { /* VBLK Component */
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u8 state[16];
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u64 parent_id;
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u8 type;
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u8 children;
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u16 chunksize;
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};
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struct vblk_dgrp { /* VBLK Disk Group */
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u8 disk_id[64];
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};
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struct vblk_disk { /* VBLK Disk */
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u8 disk_id[GUID_SIZE];
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u8 alt_name[128];
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};
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struct vblk_part { /* VBLK Partition */
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u64 start;
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u64 size; /* start, size and vol_off in sectors */
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u64 volume_offset;
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u64 parent_id;
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u64 disk_id;
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u8 partnum;
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};
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struct vblk_volu { /* VBLK Volume */
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u8 volume_type[16];
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u8 volume_state[16];
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u8 guid[16];
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u8 drive_hint[4];
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u64 size;
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u8 partition_type;
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};
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struct vblk_head { /* VBLK standard header */
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u32 group;
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u16 rec;
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u16 nrec;
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};
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struct vblk { /* Generalised VBLK */
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u8 name[64];
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u64 obj_id;
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u32 sequence;
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u8 flags;
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u8 type;
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union {
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struct vblk_comp comp;
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struct vblk_dgrp dgrp;
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struct vblk_disk disk;
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struct vblk_part part;
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struct vblk_volu volu;
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} vblk;
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struct list_head list;
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};
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struct ldmdb { /* Cache of the database */
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struct privhead ph;
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struct tocblock toc;
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struct vmdb vm;
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struct list_head v_dgrp;
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struct list_head v_disk;
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struct list_head v_volu;
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struct list_head v_comp;
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struct list_head v_part;
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};
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int ldm_partition (struct parsed_partitions *state, struct block_device *bdev);
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#endif /* _FS_PT_LDM_H_ */
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