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959bc220df
Teach LDM about a new field encountered with Windows Vista. This fixes LDM for people using Vista who have disabled drive letter assignment from one or more volumes. Doing this introduces a so far unknown field in the LDM database in the VOL5 VBLK structure which causes the LDM driver to fail to parse the VBLK structure and hence LDM fails to parse the disk altogether. This patch teaches the driver about this field. Thanks got to Ashton Mills <amills@iinet.com.au> for reporting the problem and working with me on getting it fixed. It is now working for him. Signed-off-by: Anton Altaparmakov <aia21@cantab.net> CC: Richard Russon <ldm@flatcap.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
221 lines
5.7 KiB
C
221 lines
5.7 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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/* Most numbers we deal with are big-endian and won't be aligned. */
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#define BE16(x) ((u16)be16_to_cpu(get_unaligned((__be16*)(x))))
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#define BE32(x) ((u32)be32_to_cpu(get_unaligned((__be32*)(x))))
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#define BE64(x) ((u64)be64_to_cpu(get_unaligned((__be64*)(x))))
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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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