mirror of
https://github.com/ventoy/Ventoy.git
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1. Optimization for WIMBOOT mode.
2. Add WIMBOOT for UEFI mode.
This commit is contained in:
longpanda
623
wimboot/wimboot-2.7.3/src/vdisk.h
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623
wimboot/wimboot-2.7.3/src/vdisk.h
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@@ -0,0 +1,623 @@
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#ifndef _VDISK_H
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#define _VDISK_H
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/*
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* Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
|
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*
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||||
* 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.
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||||
*
|
||||
* 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; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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/**
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* @file
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*
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* Virtual disk emulation
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*
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*/
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#include <stdint.h>
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/** Number of cylinders */
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#define VDISK_CYLINDERS 1024 /* Maximum possible */
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/** Number of heads */
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#define VDISK_HEADS 255
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/** Number of sectors per track */
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#define VDISK_SECTORS_PER_TRACK 63
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/** Sector size (in bytes) */
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#define VDISK_SECTOR_SIZE 512
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/** Partition start LBA */
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#define VDISK_PARTITION_LBA 128
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/** Cluster size (in sectors) */
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#define VDISK_CLUSTER_COUNT 64
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/** Cluster size (in bytes) */
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#define VDISK_CLUSTER_SIZE ( VDISK_CLUSTER_COUNT * VDISK_SECTOR_SIZE )
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/** Number of clusters */
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#define VDISK_CLUSTERS 0x03ffc000ULL /* Fill 2TB disk */
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/** Maximum number of virtual files
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*
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* The total number of files must be strictly less than the number of
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* sectors per cluster.
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*/
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#define VDISK_MAX_FILES ( VDISK_CLUSTER_COUNT - 1 )
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/** Maximum file size (in sectors) */
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#define VDISK_FILE_COUNT 0x800000UL /* max for 32-bit address space */
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/** Maximum file size (in clusters) */
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#define VDISK_FILE_CLUSTERS ( VDISK_FILE_COUNT / VDISK_CLUSTER_COUNT )
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/** File starting LBA */
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#define VDISK_FILE_LBA( idx ) ( ( (idx) + 1 ) * VDISK_FILE_COUNT )
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/** File index from LBA */
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#define VDISK_FILE_IDX( lba ) ( ( (lba) / VDISK_FILE_COUNT ) - 1 )
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/** File offset (in bytes) from LBA */
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#define VDISK_FILE_OFFSET( lba ) \
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( ( (lba) % VDISK_FILE_COUNT ) * VDISK_SECTOR_SIZE )
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/** File index from directory entry LBA */
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#define VDISK_FILE_DIRENT_IDX( lba ) ( ( (lba) - 1 ) % VDISK_CLUSTER_COUNT )
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/** Number of sectors allocated for FAT */
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#define VDISK_SECTORS_PER_FAT \
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( ( ( VDISK_CLUSTERS * sizeof ( uint32_t ) + \
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VDISK_CLUSTER_SIZE - 1 ) / VDISK_CLUSTER_SIZE ) \
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* VDISK_CLUSTER_COUNT )
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/** Number of reserved sectors */
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#define VDISK_RESERVED_COUNT VDISK_CLUSTER_COUNT
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/** Starting cluster number for file */
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#define VDISK_FILE_CLUSTER( idx ) \
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( ( ( ( VDISK_FILE_COUNT - VDISK_PARTITION_LBA - \
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VDISK_RESERVED_COUNT - VDISK_SECTORS_PER_FAT ) / \
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VDISK_CLUSTER_COUNT ) + 2 ) + \
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( (idx) * VDISK_FILE_CLUSTERS ) )
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/** Total number of sectors within partition */
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#define VDISK_PARTITION_COUNT \
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( VDISK_RESERVED_COUNT + VDISK_SECTORS_PER_FAT + \
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( VDISK_CLUSTERS * VDISK_CLUSTER_COUNT ) )
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/** Number of sectors */
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#define VDISK_COUNT ( VDISK_PARTITION_LBA + VDISK_PARTITION_COUNT )
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/** Calculate sector from cluster */
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#define VDISK_CLUSTER_SECTOR( cluster ) \
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( ( ( (cluster) - 2 ) * VDISK_CLUSTER_COUNT ) + \
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VDISK_RESERVED_COUNT + VDISK_SECTORS_PER_FAT )
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/*****************************************************************************
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*
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* Master Boot Record
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*
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*****************************************************************************
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*/
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/** Master Boot Record LBA */
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#define VDISK_MBR_LBA 0x00000000
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/** Master Boot Record sector count */
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#define VDISK_MBR_COUNT 1
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/** Partition table entry */
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||||
struct vdisk_partition {
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/** Bootable flag */
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uint8_t bootable;
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/** C/H/S start address */
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||||
uint8_t chs_start[3];
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/** System indicator (partition type) */
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uint8_t type;
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/** C/H/S end address */
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uint8_t chs_end[3];
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/** Linear start address */
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uint32_t start;
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/** Linear length */
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uint32_t length;
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} __attribute__ (( packed ));
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/** Master Boot Record */
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struct vdisk_mbr {
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/** Code area */
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uint8_t code[440];
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/** Disk signature */
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uint32_t signature;
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/** Padding */
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uint8_t pad[2];
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/** Partition table */
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struct vdisk_partition partitions[4];
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/** 0x55aa signature */
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uint16_t magic;
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} __attribute__ (( packed ));
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/** MBR boot partition indiciator */
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#define VDISK_MBR_BOOTABLE 0x80
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/** MBR type indicator for FAT32 */
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#define VDISK_MBR_TYPE_FAT32 0x0c
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/** MBR signature */
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||||
#define VDISK_MBR_SIGNATURE 0xc0ffeeee
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/** MBR magic */
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#define VDISK_MBR_MAGIC 0xaa55
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/*****************************************************************************
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*
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* Volume Boot Record
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*
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*****************************************************************************
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*/
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/** Volume Boot Record LBA */
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#define VDISK_VBR_LBA VDISK_PARTITION_LBA
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/** Volume Boot Record sector count */
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#define VDISK_VBR_COUNT 1
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/** Volume Boot Record */
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struct vdisk_vbr {
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/** Jump instruction */
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uint8_t jump[3];
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/** OEM identifier */
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char oemid[8];
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/** Number of bytes per sector */
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uint16_t bytes_per_sector;
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/** Number of sectors per cluster */
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uint8_t sectors_per_cluster;
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/** Number of reserved sectors */
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uint16_t reserved_sectors;
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/** Number of FATs */
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uint8_t fats;
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/** Number of root directory entries (FAT12/FAT16 only) */
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uint16_t root_directory_entries;
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/** Total number of sectors (0 if more than 65535) */
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uint16_t sectors_short;
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/** Media descriptor type */
|
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uint8_t media;
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||||
/** Number of sectors per FAT (FAT12/FAT16 only) */
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uint16_t sectors_per_fat_short;
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||||
/** Number of sectors per track */
|
||||
uint16_t sectors_per_track;
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/** Number of heads */
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uint16_t heads;
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/** Number of hidden sectors (i.e. LBA of start of partition) */
|
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uint32_t hidden_sectors;
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/** Total number of sectors */
|
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uint32_t sectors;
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||||
|
||||
/* FAT32-specific fields */
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||||
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||||
/** Sectors per FAT */
|
||||
uint32_t sectors_per_fat;
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||||
/** Flags */
|
||||
uint16_t flags;
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||||
/** FAT version number */
|
||||
uint16_t version;
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||||
/** Root directory cluster */
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||||
uint32_t root;
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/** FSInfo sector */
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uint16_t fsinfo;
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/** Backup boot sector */
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uint16_t backup;
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/** Reserved */
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uint8_t reserved[12];
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/** Drive number */
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uint8_t drive;
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/** Windows NT flags */
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uint8_t nt_flags;
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||||
/** Signature */
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uint8_t signature;
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||||
/** Volume ID serial */
|
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uint32_t serial;
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||||
/** Label (space-padded) */
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char label[11];
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/** System identifier */
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char system[8];
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/** Boot code */
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uint8_t code[420];
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||||
/** 0x55aa signature */
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||||
uint16_t magic;
|
||||
} __attribute__ (( packed ));
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|
||||
/** VBR jump instruction
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||||
*
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* bootmgr.exe will actually fail unless this is present. Someone
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||||
* must read specification documents without bothering to understand
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* what's really happening.
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*/
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||||
#define VDISK_VBR_JUMP_WTF_MS 0xe9
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/** VBR OEM ID */
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#define VDISK_VBR_OEMID "wimboot\0"
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/** VBR media type */
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#define VDISK_VBR_MEDIA 0xf8
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/** VBR signature */
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#define VDISK_VBR_SIGNATURE 0x29
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/** VBR serial number */
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#define VDISK_VBR_SERIAL 0xf00df00d
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/** VBR label */
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#define VDISK_VBR_LABEL "wimboot "
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/** VBR system identifier */
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#define VDISK_VBR_SYSTEM "FAT32 "
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/** VBR magic */
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#define VDISK_VBR_MAGIC 0xaa55
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||||
/*****************************************************************************
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*
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* FSInfo
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*
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*****************************************************************************
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*/
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/** FSInfo sector */
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#define VDISK_FSINFO_SECTOR 0x00000001
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/** FSInfo LBA */
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#define VDISK_FSINFO_LBA ( VDISK_VBR_LBA + VDISK_FSINFO_SECTOR )
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/** FSInfo sector count */
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#define VDISK_FSINFO_COUNT 1
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/** FSInfo */
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struct vdisk_fsinfo {
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/** First signature */
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||||
uint32_t magic1;
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/** Reserved */
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||||
uint8_t reserved_1[480];
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||||
/** Second signature */
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uint32_t magic2;
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||||
/** Free cluster count */
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||||
uint32_t free_count;
|
||||
/** Next free cluster */
|
||||
uint32_t next_free;
|
||||
/** Reserved */
|
||||
uint8_t reserved_2[12];
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||||
/** Third signature */
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||||
uint32_t magic3;
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||||
} __attribute__ (( packed ));
|
||||
|
||||
/** FSInfo first signature */
|
||||
#define VDISK_FSINFO_MAGIC1 0x41615252
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||||
|
||||
/** FSInfo second signature */
|
||||
#define VDISK_FSINFO_MAGIC2 0x61417272
|
||||
|
||||
/** FSInfo next free cluster */
|
||||
#define VDISK_FSINFO_NEXT_FREE 0xffffffff /* No free clusters */
|
||||
|
||||
/** FSInfo third signature */
|
||||
#define VDISK_FSINFO_MAGIC3 0xaa550000
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Backup Volume Boot Record
|
||||
*
|
||||
*****************************************************************************
|
||||
*/
|
||||
|
||||
/** Backup Volume Boot Record sector */
|
||||
#define VDISK_BACKUP_VBR_SECTOR 0x00000006
|
||||
|
||||
/** Backup Volume Boot Record LBA */
|
||||
#define VDISK_BACKUP_VBR_LBA ( VDISK_VBR_LBA + VDISK_BACKUP_VBR_SECTOR )
|
||||
|
||||
/** Backup Volume Boot Record sector count */
|
||||
#define VDISK_BACKUP_VBR_COUNT 1
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* File Allocation Table
|
||||
*
|
||||
*****************************************************************************
|
||||
*/
|
||||
|
||||
/** FAT sector */
|
||||
#define VDISK_FAT_SECTOR VDISK_RESERVED_COUNT
|
||||
|
||||
/** FAT LBA */
|
||||
#define VDISK_FAT_LBA ( VDISK_VBR_LBA + VDISK_FAT_SECTOR )
|
||||
|
||||
/** FAT sector count */
|
||||
#define VDISK_FAT_COUNT VDISK_SECTORS_PER_FAT
|
||||
|
||||
/** FAT end marker */
|
||||
#define VDISK_FAT_END_MARKER 0x0ffffff8
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Directory entries
|
||||
*
|
||||
*****************************************************************************
|
||||
*/
|
||||
|
||||
/** An 8.3 filename record */
|
||||
struct vdisk_short_filename {
|
||||
/** Filename */
|
||||
union {
|
||||
/** Structured 8.3 base name and extension */
|
||||
struct {
|
||||
/** Base name */
|
||||
char base[8];
|
||||
/** Extension */
|
||||
char ext[3];
|
||||
} __attribute__ (( packed ));
|
||||
/** Raw bytes */
|
||||
uint8_t raw[11];
|
||||
} filename;
|
||||
/** Attributes */
|
||||
uint8_t attr;
|
||||
/** Reserved */
|
||||
uint8_t reserved;
|
||||
/** Creation time in tenths of a second */
|
||||
uint8_t created_deciseconds;
|
||||
/** Creation time (HMS packed) */
|
||||
uint16_t created_time;
|
||||
/** Creation date (YMD packed) */
|
||||
uint16_t created_date;
|
||||
/** Last accessed date (YMD packed) */
|
||||
uint16_t accessed_date;
|
||||
/** High 16 bits of starting cluster number */
|
||||
uint16_t cluster_high;
|
||||
/** Modification time (HMS packed) */
|
||||
uint16_t modified_time;
|
||||
/** Modification date (YMD packed) */
|
||||
uint16_t modified_date;
|
||||
/** Low 16 bits of starting cluster number */
|
||||
uint16_t cluster_low;
|
||||
/** Size */
|
||||
uint32_t size;
|
||||
} __attribute__ (( packed ));
|
||||
|
||||
/** A long filename record */
|
||||
struct vdisk_long_filename {
|
||||
/** Sequence number */
|
||||
uint8_t sequence;
|
||||
/** Name characters */
|
||||
uint16_t name_1[5];
|
||||
/** Attributes */
|
||||
uint8_t attr;
|
||||
/** Type */
|
||||
uint8_t type;
|
||||
/** Checksum of 8.3 name */
|
||||
uint8_t checksum;
|
||||
/** Name characters */
|
||||
uint16_t name_2[6];
|
||||
/** Reserved */
|
||||
uint16_t reserved;
|
||||
/** Name characters */
|
||||
uint16_t name_3[2];
|
||||
} __attribute__ (( packed ));
|
||||
|
||||
/** Directory entry attributes */
|
||||
enum vdisk_directory_entry_attributes {
|
||||
VDISK_READ_ONLY = 0x01,
|
||||
VDISK_HIDDEN = 0x02,
|
||||
VDISK_SYSTEM = 0x04,
|
||||
VDISK_VOLUME_LABEL = 0x08,
|
||||
VDISK_DIRECTORY = 0x10,
|
||||
};
|
||||
|
||||
/** Long filename end-of-sequence marker */
|
||||
#define VDISK_LFN_END 0x40
|
||||
|
||||
/** Long filename attributes */
|
||||
#define VDISK_LFN_ATTR \
|
||||
( VDISK_READ_ONLY | VDISK_HIDDEN | VDISK_SYSTEM | VDISK_VOLUME_LABEL )
|
||||
|
||||
/** A directory entry */
|
||||
union vdisk_directory_entry {
|
||||
/** Deleted file marker */
|
||||
uint8_t deleted;
|
||||
/** 8.3 filename */
|
||||
struct vdisk_short_filename dos;
|
||||
/** Long filename */
|
||||
struct vdisk_long_filename lfn;
|
||||
} __attribute__ (( packed ));
|
||||
|
||||
/** Magic marker for deleted files */
|
||||
#define VDISK_DIRENT_DELETED 0xe5
|
||||
|
||||
/** Number of directory entries per sector */
|
||||
#define VDISK_DIRENT_PER_SECTOR \
|
||||
( VDISK_SECTOR_SIZE / \
|
||||
sizeof ( union vdisk_directory_entry ) )
|
||||
|
||||
/** A directory sector */
|
||||
struct vdisk_directory {
|
||||
/** Entries */
|
||||
union vdisk_directory_entry entry[VDISK_DIRENT_PER_SECTOR];
|
||||
} __attribute__ (( packed ));
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Root directory
|
||||
*
|
||||
*****************************************************************************
|
||||
*/
|
||||
|
||||
/** Root directory cluster */
|
||||
#define VDISK_ROOT_CLUSTER 2
|
||||
|
||||
/** Root directory sector */
|
||||
#define VDISK_ROOT_SECTOR VDISK_CLUSTER_SECTOR ( VDISK_ROOT_CLUSTER )
|
||||
|
||||
/** Root directory LBA */
|
||||
#define VDISK_ROOT_LBA ( VDISK_VBR_LBA + VDISK_ROOT_SECTOR )
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Boot directory
|
||||
*
|
||||
*****************************************************************************
|
||||
*/
|
||||
|
||||
/** Boot directory cluster */
|
||||
#define VDISK_BOOT_CLUSTER 3
|
||||
|
||||
/** Boot directory sector */
|
||||
#define VDISK_BOOT_SECTOR VDISK_CLUSTER_SECTOR ( VDISK_BOOT_CLUSTER )
|
||||
|
||||
/** Boot directory LBA */
|
||||
#define VDISK_BOOT_LBA ( VDISK_VBR_LBA + VDISK_BOOT_SECTOR )
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Sources directory
|
||||
*
|
||||
*****************************************************************************
|
||||
*/
|
||||
|
||||
/** Sources directory cluster */
|
||||
#define VDISK_SOURCES_CLUSTER 4
|
||||
|
||||
/** Sources directory sector */
|
||||
#define VDISK_SOURCES_SECTOR VDISK_CLUSTER_SECTOR ( VDISK_SOURCES_CLUSTER )
|
||||
|
||||
/** Sources directory LBA */
|
||||
#define VDISK_SOURCES_LBA ( VDISK_VBR_LBA + VDISK_SOURCES_SECTOR )
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Fonts directory
|
||||
*
|
||||
*****************************************************************************
|
||||
*/
|
||||
|
||||
/** Fonts directory cluster */
|
||||
#define VDISK_FONTS_CLUSTER 5
|
||||
|
||||
/** Fonts directory sector */
|
||||
#define VDISK_FONTS_SECTOR VDISK_CLUSTER_SECTOR ( VDISK_FONTS_CLUSTER )
|
||||
|
||||
/** Fonts directory LBA */
|
||||
#define VDISK_FONTS_LBA ( VDISK_VBR_LBA + VDISK_FONTS_SECTOR )
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Resources directory
|
||||
*
|
||||
*****************************************************************************
|
||||
*/
|
||||
|
||||
/** Resources directory cluster */
|
||||
#define VDISK_RESOURCES_CLUSTER 6
|
||||
|
||||
/** Resources directory sector */
|
||||
#define VDISK_RESOURCES_SECTOR VDISK_CLUSTER_SECTOR ( VDISK_RESOURCES_CLUSTER )
|
||||
|
||||
/** Resources directory LBA */
|
||||
#define VDISK_RESOURCES_LBA ( VDISK_VBR_LBA + VDISK_RESOURCES_SECTOR )
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* EFI directory
|
||||
*
|
||||
*****************************************************************************
|
||||
*/
|
||||
|
||||
/** EFI directory cluster */
|
||||
#define VDISK_EFI_CLUSTER 7
|
||||
|
||||
/** EFI directory sector */
|
||||
#define VDISK_EFI_SECTOR VDISK_CLUSTER_SECTOR ( VDISK_EFI_CLUSTER )
|
||||
|
||||
/** EFI directory LBA */
|
||||
#define VDISK_EFI_LBA ( VDISK_VBR_LBA + VDISK_EFI_SECTOR )
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Microsoft directory
|
||||
*
|
||||
*****************************************************************************
|
||||
*/
|
||||
|
||||
/** Microsoft directory cluster */
|
||||
#define VDISK_MICROSOFT_CLUSTER 8
|
||||
|
||||
/** Microsoft directory sector */
|
||||
#define VDISK_MICROSOFT_SECTOR VDISK_CLUSTER_SECTOR ( VDISK_MICROSOFT_CLUSTER )
|
||||
|
||||
/** Microsoft directory LBA */
|
||||
#define VDISK_MICROSOFT_LBA ( VDISK_VBR_LBA + VDISK_MICROSOFT_SECTOR )
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Files
|
||||
*
|
||||
*****************************************************************************
|
||||
*/
|
||||
|
||||
/** Maximum virtual filename length (excluding NUL) */
|
||||
#define VDISK_NAME_LEN 31
|
||||
|
||||
/** A virtual file */
|
||||
struct vdisk_file {
|
||||
/** Filename */
|
||||
char name[ VDISK_NAME_LEN + 1 /* NUL */ ];
|
||||
/** Opaque token */
|
||||
void *opaque;
|
||||
/** Length (excluding any zero-padding) */
|
||||
size_t len;
|
||||
/** Length (including any zero-padding) */
|
||||
size_t xlen;
|
||||
/** Read data
|
||||
*
|
||||
* @v file Virtual file
|
||||
* @v data Data buffer
|
||||
* @v offset Starting offset
|
||||
* @v len Length
|
||||
*/
|
||||
void ( * read ) ( struct vdisk_file *file, void *data, size_t offset,
|
||||
size_t len );
|
||||
/** Patch data (optional)
|
||||
*
|
||||
* @v file Virtual file
|
||||
* @v data Data buffer
|
||||
* @v offset Starting offset
|
||||
* @v len Length
|
||||
*/
|
||||
void ( * patch ) ( struct vdisk_file *file, void *data, size_t offset,
|
||||
size_t len );
|
||||
};
|
||||
|
||||
extern struct vdisk_file vdisk_files[VDISK_MAX_FILES];
|
||||
|
||||
extern void vdisk_read ( uint64_t lba, unsigned int count, void *data );
|
||||
extern struct vdisk_file *
|
||||
vdisk_add_file ( const char *name, void *opaque, size_t len,
|
||||
void ( * read ) ( struct vdisk_file *file, void *data,
|
||||
size_t offset, size_t len ) );
|
||||
extern void
|
||||
vdisk_patch_file ( struct vdisk_file *file,
|
||||
void ( * patch ) ( struct vdisk_file *file, void *data,
|
||||
size_t offset, size_t len ) );
|
||||
|
||||
#endif /* _VDISK_H */
|
||||
Reference in New Issue
Block a user