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VMDK disk image creation (Filip Navara)

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1461 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-07-02 14:02:54 +00:00
parent 97ccc689e6
commit 8979b2277d
2 changed files with 105 additions and 1 deletions
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1
Changelog
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@ -3,6 +3,7 @@ version 0.7.1:
- read-only Virtual FAT support (Johannes Schindelin)
- Windows 2000 install disk full hack (original idea from Vladimir
N. Oleynik)
- VMDK disk image creation (Filip Navara)
version 0.7.0:

105
block-vmdk.c
View File

@ -315,6 +315,109 @@ static int vmdk_write(BlockDriverState *bs, int64_t sector_num,
return 0;
}
static int vmdk_create(const char *filename, int64_t total_size,
const char *backing_file, int flags)
{
int fd, i;
VMDK4Header header;
uint32_t tmp, magic, grains, gd_size, gt_size, gt_count;
char *desc_template =
"# Disk DescriptorFile\n"
"version=1\n"
"CID=%x\n"
"parentCID=ffffffff\n"
"createType=\"monolithicSparse\"\n"
"\n"
"# Extent description\n"
"RW %lu SPARSE \"%s\"\n"
"\n"
"# The Disk Data Base \n"
"#DDB\n"
"\n"
"ddb.virtualHWVersion = \"3\"\n"
"ddb.geometry.cylinders = \"%lu\"\n"
"ddb.geometry.heads = \"16\"\n"
"ddb.geometry.sectors = \"63\"\n"
"ddb.adapterType = \"ide\"\n";
char desc[1024];
const char *real_filename, *temp_str;
/* XXX: add support for backing file */
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,
0644);
if (fd < 0)
return -1;
magic = cpu_to_be32(VMDK4_MAGIC);
memset(&header, 0, sizeof(header));
header.version = cpu_to_le32(1);
header.flags = cpu_to_le32(3); /* ?? */
header.capacity = cpu_to_le64(total_size);
header.granularity = cpu_to_le64(128);
header.num_gtes_per_gte = cpu_to_le32(512);
grains = (total_size + header.granularity - 1) / header.granularity;
gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9;
gt_count = (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte;
gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9;
header.desc_offset = 1;
header.desc_size = 20;
header.rgd_offset = header.desc_offset + header.desc_size;
header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count);
header.grain_offset =
((header.gd_offset + gd_size + (gt_size * gt_count) +
header.granularity - 1) / header.granularity) *
header.granularity;
header.desc_offset = cpu_to_le64(header.desc_offset);
header.desc_size = cpu_to_le64(header.desc_size);
header.rgd_offset = cpu_to_le64(header.rgd_offset);
header.gd_offset = cpu_to_le64(header.gd_offset);
header.grain_offset = cpu_to_le64(header.grain_offset);
header.check_bytes[0] = 0xa;
header.check_bytes[1] = 0x20;
header.check_bytes[2] = 0xd;
header.check_bytes[3] = 0xa;
/* write all the data */
write(fd, &magic, sizeof(magic));
write(fd, &header, sizeof(header));
ftruncate(fd, header.grain_offset << 9);
/* write grain directory */
lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET);
for (i = 0, tmp = header.rgd_offset + gd_size;
i < gt_count; i++, tmp += gt_size)
write(fd, &tmp, sizeof(tmp));
/* write backup grain directory */
lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET);
for (i = 0, tmp = header.gd_offset + gd_size;
i < gt_count; i++, tmp += gt_size)
write(fd, &tmp, sizeof(tmp));
/* compose the descriptor */
real_filename = filename;
if ((temp_str = strrchr(real_filename, '\\')) != NULL)
real_filename = temp_str + 1;
if ((temp_str = strrchr(real_filename, '/')) != NULL)
real_filename = temp_str + 1;
if ((temp_str = strrchr(real_filename, ':')) != NULL)
real_filename = temp_str + 1;
sprintf(desc, desc_template, time(NULL), (unsigned long)total_size,
real_filename, total_size / (63 * 16));
/* write the descriptor */
lseek(fd, le64_to_cpu(header.desc_offset) << 9, SEEK_SET);
write(fd, desc, strlen(desc));
close(fd);
return 0;
}
static void vmdk_close(BlockDriverState *bs)
{
BDRVVmdkState *s = bs->opaque;
@ -331,6 +434,6 @@ BlockDriver bdrv_vmdk = {
vmdk_read,
vmdk_write,
vmdk_close,
NULL, /* no create yet */
vmdk_create,
vmdk_is_allocated,
};