VMware 4 disk images support
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@927 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard
parent
dbda808a4a
commit
05efe46eaa
|
|
@ -574,6 +574,14 @@ Since holes are used, the displayed size of the COW disk image is not
|
|||
the real one. To know it, use the @code{ls -ls} command.
|
||||
@end enumerate
|
||||
|
||||
@subsection Convert VMware disk images to raw disk images
|
||||
|
||||
You can use the tool @file{vmdk2raw} to convert VMware disk images to
|
||||
raw disk images directly usable by QEMU. The syntax is:
|
||||
@example
|
||||
vmdk2raw vmware_image output_image
|
||||
@end example
|
||||
|
||||
@section Network emulation
|
||||
|
||||
QEMU simulates up to 6 networks cards (NE2000 boards). Each card can
|
||||
|
|
|
|||
24
vmdk.h
24
vmdk.h
|
|
@ -32,12 +32,11 @@
|
|||
|
||||
struct cowdisk_header
|
||||
{
|
||||
char magic[4]; /* COWD */
|
||||
uint32_t version;
|
||||
uint32_t flags;
|
||||
uint32_t disk_sectors;
|
||||
uint32_t granularity;
|
||||
uint32_t l1dir_sector;
|
||||
uint32_t l1dir_offset;
|
||||
uint32_t l1dir_size;
|
||||
uint32_t file_sectors;
|
||||
uint32_t cylinders;
|
||||
|
|
@ -50,3 +49,24 @@ struct cowdisk_header2
|
|||
uint32_t parent_ts;
|
||||
uint32_t timestamp;
|
||||
};
|
||||
|
||||
/* based on vdk 3.1 10-11-2003 by Ken Kato */
|
||||
|
||||
struct vmdisk_header
|
||||
{
|
||||
uint32_t version;
|
||||
uint32_t flags;
|
||||
|
||||
int64_t capacity;
|
||||
int64_t granularity;
|
||||
int64_t desc_offset;
|
||||
int64_t desc_size;
|
||||
int32_t num_gtes_per_gte;
|
||||
int64_t rgd_offset;
|
||||
int64_t gd_offset;
|
||||
int64_t grain_offset;
|
||||
|
||||
char filler[1];
|
||||
|
||||
char check_bytes[4];
|
||||
};
|
||||
|
|
|
|||
199
vmdk2raw.c
199
vmdk2raw.c
|
|
@ -30,131 +30,210 @@
|
|||
#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];
|
||||
static struct cowdisk_header header;
|
||||
static struct vmdisk_header header4;
|
||||
static off64_t disk_limit;
|
||||
static unsigned int granule_size;
|
||||
static uint32_t *l1dir;
|
||||
|
||||
unsigned int cached_l2dir;
|
||||
uint32_t l2dir[L2_SIZE];
|
||||
static unsigned int cached_l2dir;
|
||||
static uint32_t l2dir[L2_SIZE];
|
||||
|
||||
size_t read_physical(int fd, off64_t offset, size_t length, void *buffer)
|
||||
static struct vmdk_prm {
|
||||
uint32_t grain_table_size;
|
||||
uint32_t sectors_per_grain;
|
||||
uint32_t sectors_per_table;
|
||||
uint32_t directory_size;
|
||||
} vdsk;
|
||||
|
||||
static 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");
|
||||
if (lseek64(fd, offset, SEEK_SET) == -1) {
|
||||
printf(" error trying to seek lseek to %lld", offset);
|
||||
return -1;
|
||||
}
|
||||
|
||||
n = read(fd, buffer, length);
|
||||
if (n == -1)
|
||||
{
|
||||
perror("read from disk");
|
||||
|
||||
if (n == -1) {
|
||||
printf("read from disk %lld", offset);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return n;
|
||||
}
|
||||
|
||||
size_t copy_virtual(int in_fd, int out_fd, off64_t offset, void *buffer, size_t length)
|
||||
static int read_l1dir(int fd, size_t offset, int num)
|
||||
{
|
||||
unsigned int granule_index, granule_offset;
|
||||
unsigned int l1index, l2index;
|
||||
l1dir = malloc(sizeof(*l1dir) * num);
|
||||
if (!l1dir)
|
||||
return -1;
|
||||
return read_physical(fd, offset << SECTOR_BITS, sizeof(*l1dir) * num, (char *)l1dir) != (sizeof(*l1dir) * num);
|
||||
}
|
||||
|
||||
granule_index = offset / granule_size;
|
||||
static int read_l2dir(int fd, size_t offset, int num)
|
||||
{
|
||||
return read_physical(fd, offset << SECTOR_BITS, sizeof(l2dir[0]) * num, (char *)l2dir) != sizeof(l2dir);
|
||||
}
|
||||
|
||||
static size_t copy_virtual(struct vmdk_prm *dsk, int in_fd, int out_fd, off64_t offset, void *buffer, size_t length)
|
||||
{
|
||||
|
||||
unsigned int granule_offset;
|
||||
unsigned int grain_index;
|
||||
unsigned int sector_map_idx;
|
||||
|
||||
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;
|
||||
sector_map_idx = (offset >> SECTOR_BITS) / dsk->sectors_per_table;
|
||||
|
||||
if (sector_map_idx >= dsk->directory_size) {
|
||||
fprintf(stderr, "cannot locate grain table for %d in %d\n", sector_map_idx, dsk->directory_size);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (l2dir[l2index] == 0)
|
||||
if (l1dir[sector_map_idx] == 0)
|
||||
goto zero_fill;
|
||||
|
||||
if (sector_map_idx != cached_l2dir) {
|
||||
if (read_l2dir(in_fd, l1dir[sector_map_idx], dsk->grain_table_size)) {
|
||||
fprintf(stderr, "read failed\n");
|
||||
return -1;
|
||||
}
|
||||
cached_l2dir = sector_map_idx;
|
||||
}
|
||||
|
||||
grain_index = ((offset >> SECTOR_BITS) % dsk->sectors_per_table) / dsk->sectors_per_grain;
|
||||
|
||||
if (grain_index >= dsk->grain_table_size) {
|
||||
fprintf(stderr, "grain to large");
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (l2dir[grain_index] == 0)
|
||||
goto zero_fill;
|
||||
|
||||
if (read_physical(in_fd, (l2dir[l2index] << SECTOR_BITS) + granule_offset, length, buffer) != length)
|
||||
return 0;
|
||||
|
||||
if (read_physical(in_fd, (l2dir[grain_index] << SECTOR_BITS) + granule_offset, length, buffer) != length) {
|
||||
fprintf(stderr, "read error 2\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
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);
|
||||
if (offset + length >= disk_limit) {
|
||||
if (lseek64(out_fd, length-1, SEEK_CUR) == (off_t)-1)
|
||||
perror("lseek");
|
||||
/* write the last NULL byte instead of seeking */
|
||||
const char nil = 0;
|
||||
write(out_fd, &nil, 1);
|
||||
} else {
|
||||
if (lseek(out_fd, length, SEEK_CUR) == (off_t)-1)
|
||||
if (lseek64(out_fd, length, SEEK_CUR) == (off_t)-1)
|
||||
perror("lseek");
|
||||
}
|
||||
return length;
|
||||
}
|
||||
|
||||
|
||||
int open_vmdk(const char *filename)
|
||||
static int open_vmdk4(int fd)
|
||||
{
|
||||
int fd = open(filename, O_RDONLY | O_LARGEFILE);
|
||||
if (fd == -1)
|
||||
{
|
||||
perror(filename);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (read(fd, &header, sizeof(header)) != sizeof(header))
|
||||
{
|
||||
if (read(fd, &header4, sizeof(header4)) != sizeof(header4)) {
|
||||
perror("read from disk");
|
||||
return -1;
|
||||
}
|
||||
|
||||
granule_size = header4.granularity << SECTOR_BITS;
|
||||
disk_limit = header4.capacity << SECTOR_BITS;
|
||||
|
||||
cached_l2dir = -1;
|
||||
vdsk.grain_table_size = header4.num_gtes_per_gte;
|
||||
vdsk.sectors_per_grain = header4.granularity;
|
||||
vdsk.sectors_per_table = vdsk.grain_table_size * vdsk.sectors_per_grain;
|
||||
vdsk.directory_size = (header4.capacity + vdsk.sectors_per_table - 1) / vdsk.sectors_per_table + 1;
|
||||
|
||||
if (memcmp(header.magic, "COWD", 4) != 0)
|
||||
{
|
||||
fprintf(stderr, "%s is not a VMware virtual disk image\n", filename);
|
||||
if (read_l1dir(fd, header4.rgd_offset, vdsk.directory_size))
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
static int open_vmdk3(int fd)
|
||||
{
|
||||
if (read(fd, &header, sizeof(header)) != sizeof(header)) {
|
||||
perror("read from disk\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
granule_size = header.granularity << SECTOR_BITS;
|
||||
if (read_physical(fd, header.l1dir_sector << SECTOR_BITS, sizeof(l1dir), (char *)l1dir) != sizeof(l1dir))
|
||||
vdsk.sectors_per_grain = header.granularity;
|
||||
vdsk.grain_table_size = L2_SIZE;
|
||||
vdsk.sectors_per_table = vdsk.grain_table_size * vdsk.sectors_per_grain;
|
||||
vdsk.directory_size = L1_SIZE;
|
||||
if (read_l1dir(fd, header.l1dir_offset, L1_SIZE))
|
||||
return -1;
|
||||
|
||||
disk_limit = header.disk_sectors << SECTOR_BITS;
|
||||
|
||||
return fd;
|
||||
}
|
||||
|
||||
static int open_vmdk(const char *filename)
|
||||
{
|
||||
int fd = open(filename, O_RDONLY | O_LARGEFILE);
|
||||
if (fd == -1) {
|
||||
perror(filename);
|
||||
return -1;
|
||||
}
|
||||
|
||||
char magic[4];
|
||||
if (read(fd, &magic, sizeof(magic)) != sizeof(magic)) {
|
||||
perror("read from disk");
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (!memcmp(magic, "KDMV", sizeof(magic))) {
|
||||
open_vmdk4(fd);
|
||||
} else if (!memcmp(magic, "COWD", sizeof(magic))) {
|
||||
open_vmdk3(fd);
|
||||
} else {
|
||||
fprintf(stderr, "%s is not a VMware virtual disk image\n", filename);
|
||||
return -1;
|
||||
}
|
||||
|
||||
cached_l2dir = -1;
|
||||
return fd;
|
||||
}
|
||||
|
||||
void help(void)
|
||||
static 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"
|
||||
"vmware_image a vmware cow image\n"
|
||||
"output_image the created disk image\n"
|
||||
);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
#define BUF_SIZE granule_size
|
||||
void copy_disk(in_fd, out_fd)
|
||||
#define BUF_SIZE 0x10000
|
||||
static void copy_disk(in_fd, out_fd)
|
||||
{
|
||||
char buf[BUF_SIZE];
|
||||
off64_t i = 0;
|
||||
int ret;
|
||||
while (i < disk_limit) {
|
||||
i += copy_virtual(in_fd, out_fd, i, buf, sizeof(buf));
|
||||
ret = copy_virtual(&vdsk, in_fd, out_fd, i, buf, sizeof(buf));
|
||||
if (ret < 0) {
|
||||
fprintf(stderr, "copying failed\n");
|
||||
exit(-1);
|
||||
}
|
||||
i += ret;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -170,7 +249,7 @@ int main(int argc, char **argv)
|
|||
return -1;
|
||||
}
|
||||
|
||||
out_fd = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
|
||||
out_fd = open(argv[2], O_WRONLY | O_LARGEFILE | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
|
||||
if (out_fd < 0) {
|
||||
perror(argv[2]);
|
||||
return -1;
|
||||
|
|
|
|||
Loading…
Reference in a new issue