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Diffstat (limited to 'kernel/block/partitions/ldm.h')
| -rw-r--r-- | kernel/block/partitions/ldm.h | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/kernel/block/partitions/ldm.h b/kernel/block/partitions/ldm.h new file mode 100644 index 000000000..374242c09 --- /dev/null +++ b/kernel/block/partitions/ldm.h @@ -0,0 +1,215 @@ +/** + * 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_ */ + |