121 lines
3.6 KiB
C++
121 lines
3.6 KiB
C++
/*
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* This file provides the interface for using VMWare's virtual
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* disk image format under Bochs.
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*
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* Author: Sharvil Nanavati, for Net Integration Technologies, Inc.
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* Contact: snrrrub@yahoo.com
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*
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* Copyright (C) 2003 Net Integration Technologies, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _COWDISK_H
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#define _COWDISK_H 1
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class vmware3_image_t : public device_image_t
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{
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public:
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vmware3_image_t() : FL_SHIFT(25), FL_MASK(0xFE000000)
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{ };
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int open (const char* pathname);
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void close();
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off_t lseek (off_t offset, int whence);
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ssize_t read (void* buf, size_t count);
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ssize_t write (const void* buf, size_t count);
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private:
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static const off_t INVALID_OFFSET;
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#if defined(_MSC_VER) && (_MSC_VER<1300)
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#pragma pack(push, 1)
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#elif defined(__MWERKS__) && defined(macintosh)
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#pragma options align=packed
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#endif
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typedef
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#if defined(_MSC_VER) && (_MSC_VER>=1300)
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__declspec(align(1))
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#endif
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struct _COW_Header {
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Bit8u id[4];
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Bit32u header_version;
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Bit32u flags;
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Bit32u total_sectors;
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Bit32u tlb_size_sectors;
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Bit32u flb_offset_sectors;
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Bit32u flb_count;
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Bit32u next_sector_to_allocate;
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Bit32u cylinders;
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Bit32u heads;
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Bit32u sectors;
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Bit8u PAD0[1016];
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Bit32u last_modified_time;
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Bit8u PAD1[572];
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Bit32u last_modified_time_save;
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Bit8u label[8];
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Bit32u chain_id;
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Bit32u number_of_chains;
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Bit32u cylinders_in_disk;
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Bit32u heads_in_disk;
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Bit32u sectors_in_disk;
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Bit32u total_sectors_in_disk;
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Bit8u PAD2[8];
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Bit32u vmware_version;
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Bit8u PAD3[364];
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} COW_Header
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#if !defined(_MSC_VER)
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GCC_ATTRIBUTE((packed))
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#endif
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;
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#if defined(_MSC_VER) && (_MSC_VER<1300)
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#pragma pack(pop)
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#elif defined(__MWERKS__) && defined(macintosh)
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#pragma options align=reset
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#endif
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struct COW_Image;
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friend struct COW_Image;
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struct COW_Image {
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int fd;
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COW_Header header;
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Bit32u * flb;
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Bit32u ** slb;
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Bit8u * tlb;
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off_t offset;
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off_t min_offset;
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off_t max_offset;
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bool synced;
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} * images, * current;
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int read_header(int fd, COW_Header & header);
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int write_header(int fd, COW_Header & header);
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int read_ints(int fd, Bit32u *buffer, size_t count);
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int write_ints(int fd, Bit32u *buffer, size_t count);
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char * generate_cow_name(const char * filename, Bit32u chain);
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bool is_valid_header(COW_Header & header);
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off_t perform_seek();
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bool sync();
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const Bit32u FL_SHIFT;
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const Bit32u FL_MASK;
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off_t requested_offset;
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Bit32u slb_count;
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Bit32u tlb_size;
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};
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#endif
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