554 lines
16 KiB
C++
554 lines
16 KiB
C++
/////////////////////////////////////////////////////////////////////////
|
|
// $Id: hdimage.h,v 1.1 2005-11-06 11:07:01 vruppert Exp $
|
|
/////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Copyright (C) 2005 MandrakeSoft S.A.
|
|
//
|
|
// MandrakeSoft S.A.
|
|
// 43, rue d'Aboukir
|
|
// 75002 Paris - France
|
|
// http://www.linux-mandrake.com/
|
|
// http://www.mandrakesoft.com/
|
|
//
|
|
// This library is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Lesser General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 2 of the License, or (at your option) any later version.
|
|
//
|
|
// This library 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
|
|
// Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License along with this library; if not, write to the Free Software
|
|
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
// SPARSE IMAGES HEADER
|
|
#define SPARSE_HEADER_MAGIC (0x02468ace)
|
|
#define SPARSE_HEADER_VERSION 1
|
|
#define SPARSE_HEADER_SIZE (256) // Plenty of room for later
|
|
#define SPARSE_PAGE_NOT_ALLOCATED (0xffffffff)
|
|
|
|
typedef struct
|
|
{
|
|
Bit32u magic;
|
|
Bit32u version;
|
|
Bit32u pagesize;
|
|
Bit32u numpages;
|
|
|
|
Bit32u padding[60];
|
|
} sparse_header_t;
|
|
|
|
#define STANDARD_HEADER_MAGIC "Bochs Virtual HD Image"
|
|
#define STANDARD_HEADER_VERSION (0x00010000)
|
|
#define STANDARD_HEADER_SIZE (512)
|
|
|
|
|
|
// WARNING : headers are kept in x86 (little) endianness
|
|
typedef struct
|
|
{
|
|
Bit8u magic[32];
|
|
Bit8u type[16];
|
|
Bit8u subtype[16];
|
|
Bit32u version;
|
|
Bit32u header;
|
|
} standard_header_t;
|
|
|
|
#define REDOLOG_TYPE "Redolog"
|
|
#define REDOLOG_SUBTYPE_UNDOABLE "Undoable"
|
|
#define REDOLOG_SUBTYPE_VOLATILE "Volatile"
|
|
#define REDOLOG_SUBTYPE_GROWING "Growing"
|
|
// #define REDOLOG_SUBTYPE_Z_UNDOABLE "z-Undoable"
|
|
// #define REDOLOG_SUBTYPE_Z_VOLATILE "z-Volatile"
|
|
|
|
#define REDOLOG_PAGE_NOT_ALLOCATED (0xffffffff)
|
|
|
|
#define UNDOABLE_REDOLOG_EXTENSION ".redolog"
|
|
#define UNDOABLE_REDOLOG_EXTENSION_LENGTH (strlen(UNDOABLE_REDOLOG_EXTENSION))
|
|
#define VOLATILE_REDOLOG_EXTENSION ".XXXXXX"
|
|
#define VOLATILE_REDOLOG_EXTENSION_LENGTH (strlen(VOLATILE_REDOLOG_EXTENSION))
|
|
|
|
typedef struct
|
|
{
|
|
// the fields in the header are kept in little endian
|
|
Bit32u catalog; // #entries in the catalog
|
|
Bit32u bitmap; // bitmap size in bytes
|
|
Bit32u extent; // extent size in bytes
|
|
Bit64u disk; // disk size in bytes
|
|
} redolog_specific_header_t;
|
|
|
|
typedef struct
|
|
{
|
|
standard_header_t standard;
|
|
redolog_specific_header_t specific;
|
|
|
|
Bit8u padding[STANDARD_HEADER_SIZE - (sizeof (standard_header_t) + sizeof (redolog_specific_header_t))];
|
|
} redolog_header_t;
|
|
|
|
// htod : convert host to disk (little) endianness
|
|
// dtoh : convert disk (little) to host endianness
|
|
#if defined (BX_LITTLE_ENDIAN)
|
|
#define htod32(val) (val)
|
|
#define dtoh32(val) (val)
|
|
#define htod64(val) (val)
|
|
#define dtoh64(val) (val)
|
|
#else
|
|
#define htod32(val) ( (((val)&0xff000000)>>24) | (((val)&0xff0000)>>8) | (((val)&0xff00)<<8) | (((val)&0xff)<<24) )
|
|
#define dtoh32(val) htod32(val)
|
|
#define htod64(val) ( (((val)&0xff00000000000000LL)>>56) | (((val)&0xff000000000000LL)>>40) | (((val)&0xff0000000000LL)>>24) | (((val)&0xff00000000LL)>>8) | (((val)&0xff000000LL)<<8) | (((val)&0xff0000LL)<<24) | (((val)&0xff00LL)<<40) | (((val)&0xffLL)<<56) )
|
|
#define dtoh64(val) htod64(val)
|
|
#endif
|
|
|
|
#ifndef HDIMAGE_HEADERS_ONLY
|
|
|
|
class device_image_t
|
|
{
|
|
public:
|
|
// Open a image. Returns non-negative if successful.
|
|
virtual int open (const char* pathname) = 0;
|
|
|
|
// Close the image.
|
|
virtual void close () = 0;
|
|
|
|
// Position ourselves. Return the resulting offset from the
|
|
// beginning of the file.
|
|
virtual off_t lseek (off_t offset, int whence) = 0;
|
|
|
|
// Read count bytes to the buffer buf. Return the number of
|
|
// bytes read (count).
|
|
virtual ssize_t read (void* buf, size_t count) = 0;
|
|
|
|
// Write count bytes from buf. Return the number of bytes
|
|
// written (count).
|
|
virtual ssize_t write (const void* buf, size_t count) = 0;
|
|
|
|
unsigned cylinders;
|
|
unsigned heads;
|
|
unsigned sectors;
|
|
off_t hd_size;
|
|
};
|
|
|
|
// FLAT MODE
|
|
class default_image_t : public device_image_t
|
|
{
|
|
public:
|
|
// Open a image. Returns non-negative if successful.
|
|
int open (const char* pathname);
|
|
|
|
// Open an image with specific flags. Returns non-negative if successful.
|
|
int open (const char* pathname, int flags);
|
|
|
|
// Close the image.
|
|
void close ();
|
|
|
|
// Position ourselves. Return the resulting offset from the
|
|
// beginning of the file.
|
|
off_t lseek (off_t offset, int whence);
|
|
|
|
// Read count bytes to the buffer buf. Return the number of
|
|
// bytes read (count).
|
|
ssize_t read (void* buf, size_t count);
|
|
|
|
// Write count bytes from buf. Return the number of bytes
|
|
// written (count).
|
|
ssize_t write (const void* buf, size_t count);
|
|
|
|
private:
|
|
int fd;
|
|
|
|
};
|
|
|
|
// CONCAT MODE
|
|
class concat_image_t : public device_image_t
|
|
{
|
|
public:
|
|
// Default constructor
|
|
concat_image_t();
|
|
|
|
// Open a image. Returns non-negative if successful.
|
|
int open (const char* pathname);
|
|
|
|
// Close the image.
|
|
void close ();
|
|
|
|
// Position ourselves. Return the resulting offset from the
|
|
// beginning of the file.
|
|
off_t lseek (off_t offset, int whence);
|
|
|
|
// Read count bytes to the buffer buf. Return the number of
|
|
// bytes read (count).
|
|
ssize_t read (void* buf, size_t count);
|
|
|
|
// Write count bytes from buf. Return the number of bytes
|
|
// written (count).
|
|
ssize_t write (const void* buf, size_t count);
|
|
|
|
private:
|
|
#define BX_CONCAT_MAX_IMAGES 8
|
|
int fd_table[BX_CONCAT_MAX_IMAGES];
|
|
off_t start_offset_table[BX_CONCAT_MAX_IMAGES];
|
|
off_t length_table[BX_CONCAT_MAX_IMAGES];
|
|
void increment_string (char *str);
|
|
int maxfd; // number of entries in tables that are valid
|
|
|
|
// notice if anyone does sequential read or write without seek in between.
|
|
// This can be supported pretty easily, but needs additional checks.
|
|
// 0=something other than seek was last operation
|
|
// 1=seek was last operation
|
|
int seek_was_last_op;
|
|
|
|
// the following variables tell which partial image file to use for
|
|
// the next read and write.
|
|
int index; // index into table
|
|
int fd; // fd to use for reads and writes
|
|
off_t thismin, thismax; // byte offset boundary of this image
|
|
};
|
|
|
|
// SPARSE MODE
|
|
class sparse_image_t : public device_image_t
|
|
{
|
|
|
|
// Format of a sparse file:
|
|
// 256 byte header, containing details such as page size and number of pages
|
|
// Page indirection table, mapping virtual pages to physical pages within file
|
|
// Physical pages till end of file
|
|
|
|
public:
|
|
// Default constructor
|
|
sparse_image_t();
|
|
|
|
// Open a image. Returns non-negative if successful.
|
|
int open (const char* pathname);
|
|
|
|
// Close the image.
|
|
void close ();
|
|
|
|
// Position ourselves. Return the resulting offset from the
|
|
// beginning of the file.
|
|
off_t lseek (off_t offset, int whence);
|
|
|
|
// Read count bytes to the buffer buf. Return the number of
|
|
// bytes read (count).
|
|
ssize_t read (void* buf, size_t count);
|
|
|
|
// Write count bytes from buf. Return the number of bytes
|
|
// written (count).
|
|
ssize_t write (const void* buf, size_t count);
|
|
|
|
private:
|
|
int fd;
|
|
|
|
#ifdef _POSIX_MAPPED_FILES
|
|
void * mmap_header;
|
|
size_t mmap_length;
|
|
size_t system_pagesize_mask;
|
|
#endif
|
|
Bit32u * pagetable;
|
|
|
|
// Header is written to disk in little-endian (x86) format
|
|
// Thus needs to be converted on big-endian systems before read
|
|
// The pagetable is also kept little endian
|
|
|
|
sparse_header_t header;
|
|
|
|
Bit32u pagesize;
|
|
int pagesize_shift;
|
|
Bit32u pagesize_mask;
|
|
|
|
off_t data_start;
|
|
off_t underlying_filesize;
|
|
|
|
char * pathname;
|
|
|
|
off_t position;
|
|
|
|
Bit32u position_virtual_page;
|
|
Bit32u position_physical_page;
|
|
Bit32u position_page_offset;
|
|
|
|
off_t underlying_current_filepos;
|
|
|
|
off_t total_size;
|
|
|
|
void panic(const char * message);
|
|
off_t
|
|
#ifndef PARANOID
|
|
sparse_image_t::
|
|
#endif
|
|
get_physical_offset();
|
|
void
|
|
#ifndef PARANOID
|
|
sparse_image_t::
|
|
#endif
|
|
set_virtual_page(Bit32u new_virtual_page);
|
|
void read_header();
|
|
ssize_t read_page_fragment(Bit32u read_virtual_page, Bit32u read_page_offset, size_t read_size, void * buf);
|
|
|
|
sparse_image_t * parent_image;
|
|
};
|
|
|
|
#if EXTERNAL_DISK_SIMULATOR
|
|
#include "external-disk-simulator.h"
|
|
#endif
|
|
|
|
#if DLL_HD_SUPPORT
|
|
class dll_image_t : public device_image_t
|
|
{
|
|
public:
|
|
// Open a image. Returns non-negative if successful.
|
|
int open (const char* pathname);
|
|
|
|
// Close the image.
|
|
void close ();
|
|
|
|
// Position ourselves. Return the resulting offset from the
|
|
// beginning of the file.
|
|
off_t lseek (off_t offset, int whence);
|
|
|
|
// Read count bytes to the buffer buf. Return the number of
|
|
// bytes read (count).
|
|
ssize_t read (void* buf, size_t count);
|
|
|
|
// Write count bytes from buf. Return the number of bytes
|
|
// written (count).
|
|
ssize_t write (const void* buf, size_t count);
|
|
|
|
private:
|
|
int vunit,vblk;
|
|
|
|
};
|
|
#endif
|
|
|
|
// REDOLOG class
|
|
class redolog_t
|
|
{
|
|
public:
|
|
redolog_t();
|
|
int make_header (const char* type, Bit64u size);
|
|
int create (const char* filename, const char* type, Bit64u size);
|
|
int create (int filedes, const char* type, Bit64u size);
|
|
int open (const char* filename, const char* type, Bit64u size);
|
|
void close ();
|
|
|
|
off_t lseek (off_t offset, int whence);
|
|
ssize_t read (void* buf, size_t count);
|
|
ssize_t write (const void* buf, size_t count);
|
|
|
|
private:
|
|
void print_header();
|
|
int fd;
|
|
redolog_header_t header; // Header is kept in x86 (little) endianness
|
|
Bit32u *catalog;
|
|
Bit8u *bitmap;
|
|
Bit32u extent_index;
|
|
Bit32u extent_offset;
|
|
Bit32u extent_next;
|
|
|
|
Bit32u bitmap_blocs;
|
|
Bit32u extent_blocs;
|
|
};
|
|
|
|
// GROWING MODE
|
|
class growing_image_t : public device_image_t
|
|
{
|
|
public:
|
|
// Contructor
|
|
growing_image_t(Bit64u size);
|
|
|
|
// Open a image. Returns non-negative if successful.
|
|
int open (const char* pathname);
|
|
|
|
// Close the image.
|
|
void close ();
|
|
|
|
// Position ourselves. Return the resulting offset from the
|
|
// beginning of the file.
|
|
off_t lseek (off_t offset, int whence);
|
|
|
|
// Read count bytes to the buffer buf. Return the number of
|
|
// bytes read (count).
|
|
ssize_t read (void* buf, size_t count);
|
|
|
|
// Write count bytes from buf. Return the number of bytes
|
|
// written (count).
|
|
ssize_t write (const void* buf, size_t count);
|
|
|
|
private:
|
|
redolog_t *redolog;
|
|
Bit64u size;
|
|
};
|
|
|
|
// UNDOABLE MODE
|
|
class undoable_image_t : public device_image_t
|
|
{
|
|
public:
|
|
// Contructor
|
|
undoable_image_t(Bit64u size, const char* redolog_name);
|
|
|
|
// Open a image. Returns non-negative if successful.
|
|
int open (const char* pathname);
|
|
|
|
// Close the image.
|
|
void close ();
|
|
|
|
// Position ourselves. Return the resulting offset from the
|
|
// beginning of the file.
|
|
off_t lseek (off_t offset, int whence);
|
|
|
|
// Read count bytes to the buffer buf. Return the number of
|
|
// bytes read (count).
|
|
ssize_t read (void* buf, size_t count);
|
|
|
|
// Write count bytes from buf. Return the number of bytes
|
|
// written (count).
|
|
ssize_t write (const void* buf, size_t count);
|
|
|
|
private:
|
|
redolog_t *redolog; // Redolog instance
|
|
default_image_t *ro_disk; // Read-only flat disk instance
|
|
Bit64u size;
|
|
char *redolog_name; // Redolog name
|
|
};
|
|
|
|
|
|
// VOLATILE MODE
|
|
class volatile_image_t : public device_image_t
|
|
{
|
|
public:
|
|
// Contructor
|
|
volatile_image_t(Bit64u size, const char* redolog_name);
|
|
|
|
// Open a image. Returns non-negative if successful.
|
|
int open (const char* pathname);
|
|
|
|
// Close the image.
|
|
void close ();
|
|
|
|
// Position ourselves. Return the resulting offset from the
|
|
// beginning of the file.
|
|
off_t lseek (off_t offset, int whence);
|
|
|
|
// Read count bytes to the buffer buf. Return the number of
|
|
// bytes read (count).
|
|
ssize_t read (void* buf, size_t count);
|
|
|
|
// Write count bytes from buf. Return the number of bytes
|
|
// written (count).
|
|
ssize_t write (const void* buf, size_t count);
|
|
|
|
private:
|
|
redolog_t *redolog; // Redolog instance
|
|
default_image_t *ro_disk; // Read-only flat disk instance
|
|
Bit64u size;
|
|
char *redolog_name; // Redolog name
|
|
char *redolog_temp; // Redolog temporary file name
|
|
};
|
|
|
|
|
|
#if BX_COMPRESSED_HD_SUPPORT
|
|
|
|
#include <zlib.h>
|
|
|
|
|
|
// Default compressed READ-ONLY image class
|
|
class z_ro_image_t : public device_image_t
|
|
{
|
|
public:
|
|
// Contructor
|
|
z_ro_image_t();
|
|
|
|
// Open a image. Returns non-negative if successful.
|
|
int open (const char* pathname);
|
|
|
|
// Close the image.
|
|
void close ();
|
|
|
|
// Position ourselves. Return the resulting offset from the
|
|
// beginning of the file.
|
|
off_t lseek (off_t offset, int whence);
|
|
|
|
// Read count bytes to the buffer buf. Return the number of
|
|
// bytes read (count).
|
|
ssize_t read (void* buf, size_t count);
|
|
|
|
// Write count bytes from buf. Return the number of bytes
|
|
// written (count).
|
|
ssize_t write (const void* buf, size_t count);
|
|
|
|
private:
|
|
off_t offset;
|
|
int fd;
|
|
gzFile gzfile;
|
|
|
|
};
|
|
|
|
// Z-UNDOABLE MODE
|
|
class z_undoable_image_t : public device_image_t
|
|
{
|
|
public:
|
|
// Contructor
|
|
z_undoable_image_t(Bit64u size, const char* redolog_name);
|
|
|
|
// Open a image. Returns non-negative if successful.
|
|
int open (const char* pathname);
|
|
|
|
// Close the image.
|
|
void close ();
|
|
|
|
// Position ourselves. Return the resulting offset from the
|
|
// beginning of the file.
|
|
off_t lseek (off_t offset, int whence);
|
|
|
|
// Read count bytes to the buffer buf. Return the number of
|
|
// bytes read (count).
|
|
ssize_t read (void* buf, size_t count);
|
|
|
|
// Write count bytes from buf. Return the number of bytes
|
|
// written (count).
|
|
ssize_t write (const void* buf, size_t count);
|
|
|
|
private:
|
|
redolog_t *redolog; // Redolog instance
|
|
z_ro_image_t *ro_disk; // Read-only compressed flat disk instance
|
|
Bit64u size;
|
|
char *redolog_name; // Redolog name
|
|
};
|
|
|
|
// Z-VOLATILE MODE
|
|
class z_volatile_image_t : public device_image_t
|
|
{
|
|
public:
|
|
// Contructor
|
|
z_volatile_image_t(Bit64u size, const char* redolog_name);
|
|
|
|
// Open a image. Returns non-negative if successful.
|
|
int open (const char* pathname);
|
|
|
|
// Close the image.
|
|
void close ();
|
|
|
|
// Position ourselves. Return the resulting offset from the
|
|
// beginning of the file.
|
|
off_t lseek (off_t offset, int whence);
|
|
|
|
// Read count bytes to the buffer buf. Return the number of
|
|
// bytes read (count).
|
|
ssize_t read (void* buf, size_t count);
|
|
|
|
// Write count bytes from buf. Return the number of bytes
|
|
// written (count).
|
|
ssize_t write (const void* buf, size_t count);
|
|
|
|
private:
|
|
redolog_t *redolog; // Redolog instance
|
|
z_ro_image_t *ro_disk; // Read-only compressed flat disk instance
|
|
Bit64u size;
|
|
char *redolog_name; // Redolog name
|
|
char *redolog_temp; // Redolog temporary file name
|
|
};
|
|
|
|
#endif
|
|
|
|
#endif // HDIMAGE_HEADERS_ONLY
|