git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@813 c046a42c-6fe2-441c-8c8c-71466251a162
183 lines
4.4 KiB
C
183 lines
4.4 KiB
C
/*
|
|
vmdk2raw: convert vmware images to raw disk images
|
|
Copyright (C) Net Integration Technologies 2004
|
|
Copyright (C) Matthew Chapman 2003
|
|
|
|
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; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <inttypes.h>
|
|
#include <sys/types.h>
|
|
#include <string.h>
|
|
#include <sys/stat.h>
|
|
#include <errno.h>
|
|
#include "vmdk.h"
|
|
#include "config-host.h"
|
|
|
|
struct cowdisk_header header;
|
|
struct cowdisk_header2 header2;
|
|
off_t disk_base, disk_limit;
|
|
unsigned int granule_size;
|
|
uint32_t l1dir[L1_SIZE];
|
|
|
|
unsigned int cached_l2dir;
|
|
uint32_t l2dir[L2_SIZE];
|
|
|
|
size_t read_physical(int fd, off64_t offset, size_t length, void *buffer)
|
|
{
|
|
size_t n;
|
|
|
|
if (lseek64(fd, offset, SEEK_SET) == -1)
|
|
{
|
|
perror("lseek");
|
|
return -1;
|
|
}
|
|
|
|
n = read(fd, buffer, length);
|
|
if (n == -1)
|
|
{
|
|
perror("read from disk");
|
|
return -1;
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
size_t copy_virtual(int in_fd, int out_fd, off64_t offset, void *buffer, size_t length)
|
|
{
|
|
unsigned int granule_index, granule_offset;
|
|
unsigned int l1index, l2index;
|
|
|
|
granule_index = offset / granule_size;
|
|
granule_offset = offset % granule_size;
|
|
length = MIN(length, granule_size - granule_offset);
|
|
length = MIN(length, disk_limit - offset);
|
|
|
|
l1index = (granule_index >> L2_BITS) & L1_MASK;
|
|
l2index = granule_index & L2_MASK;
|
|
|
|
if (l1dir[l1index] == 0)
|
|
goto zero_fill;
|
|
|
|
if (l1index != cached_l2dir)
|
|
{
|
|
if (read_physical(in_fd, (l1dir[l1index] << SECTOR_BITS), sizeof(l2dir), (char *)l2dir) != sizeof(l2dir))
|
|
return 0;
|
|
|
|
cached_l2dir = l1index;
|
|
}
|
|
|
|
if (l2dir[l2index] == 0)
|
|
goto zero_fill;
|
|
|
|
if (read_physical(in_fd, (l2dir[l2index] << SECTOR_BITS) + granule_offset, length, buffer) != length)
|
|
return 0;
|
|
|
|
write(out_fd, buffer, length);
|
|
return length;
|
|
|
|
zero_fill:
|
|
/* the last chunk of the file can not be sparse
|
|
* or the file will be truncated */
|
|
if (offset + length < disk_limit) {
|
|
memset(buffer, 0, length);
|
|
write(out_fd, buffer, length);
|
|
} else {
|
|
if (lseek(out_fd, length, SEEK_CUR) == (off_t)-1)
|
|
perror("lseek");
|
|
}
|
|
return length;
|
|
}
|
|
|
|
|
|
int open_vmdk(const char *filename)
|
|
{
|
|
int fd = open(filename, O_RDONLY);
|
|
if (fd == -1)
|
|
{
|
|
perror(filename);
|
|
return -1;
|
|
}
|
|
|
|
if (read(fd, &header, sizeof(header)) != sizeof(header))
|
|
{
|
|
perror("read from disk");
|
|
return -1;
|
|
}
|
|
|
|
if (memcmp(header.magic, "COWD", 4) != 0)
|
|
{
|
|
fprintf(stderr, "%s is not a VMware virtual disk image\n", filename);
|
|
return -1;
|
|
}
|
|
|
|
granule_size = header.granularity << SECTOR_BITS;
|
|
if (read_physical(fd, header.l1dir_sector << SECTOR_BITS, sizeof(l1dir), (char *)l1dir) != sizeof(l1dir))
|
|
return -1;
|
|
|
|
disk_limit = header.disk_sectors << SECTOR_BITS;
|
|
|
|
cached_l2dir = -1;
|
|
return fd;
|
|
}
|
|
|
|
void help(void)
|
|
{
|
|
printf("vmdk2raw\n"
|
|
"usage: vmdk2raw vmware_image output_image\n"
|
|
"\n"
|
|
"vmware_image a vmware 2.x/3.x cow image\n"
|
|
"output_image the created disk image\n"
|
|
);
|
|
exit(1);
|
|
}
|
|
|
|
#define BUF_SIZE granule_size
|
|
void copy_disk(in_fd, out_fd)
|
|
{
|
|
char buf[BUF_SIZE];
|
|
off64_t i = 0;
|
|
while (i < disk_limit) {
|
|
i += copy_virtual(in_fd, out_fd, i, buf, sizeof(buf));
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int out_fd, in_fd;
|
|
|
|
if (argc < 3)
|
|
help();
|
|
|
|
in_fd = open_vmdk(argv[1]);
|
|
if (in_fd < 0) {
|
|
return -1;
|
|
}
|
|
|
|
out_fd = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
|
|
if (out_fd < 0) {
|
|
perror(argv[2]);
|
|
return -1;
|
|
}
|
|
|
|
copy_disk(in_fd, out_fd);
|
|
close(out_fd);
|
|
return 0;
|
|
}
|