Subversion Repositories or1k

/**

 * ldm - Part of the Linux-NTFS project.

 *

 * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>

 * Copyright (C) 2001      Anton Altaparmakov <aia21@cantab.net>

 * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>

 *

 * Documentation is available at http://linux-ntfs.sf.net/ldm

 *

 * 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  0x5052495648454144      /* PRIVHEAD */

#define MAGIC_TOCBLOCK  0x544F43424C4F434B      /* 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          59

/* 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 WIN2K_DYNAMIC_PARTITION 0x42            /* Formerly SFS (Landis). */

#define TOC_BITMAP1             "config"        /* Names of the two defined */

#define TOC_BITMAP2             "log"           /* bitmaps in the TOCBLOCK. */

/* Most numbers we deal with are big-endian and won't be aligned. */

#define BE16(x)                 ((u16)be16_to_cpu(get_unaligned((u16*)(x))))

#define BE32(x)                 ((u32)be32_to_cpu(get_unaligned((u32*)(x))))

#define BE64(x)                 ((u64)be64_to_cpu(get_unaligned((u64*)(x))))

/* 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 gendisk *hd, struct block_device *bdev,

        unsigned long first_sector, int first_minor);

#endif /* _FS_PT_LDM_H_ */