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authorbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2005-07-02 14:02:54 +0000
committerbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2005-07-02 14:02:54 +0000
commit8979b2277d92d0acd0fd3be523a7515f86f79bec (patch)
treee88fe777d1611bce0eaa0a6d73154913d902276f /block-vmdk.c
parent97ccc689e614918a3b21ef58ce77ce297ace27fa (diff)
VMDK disk image creation (Filip Navara)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1461 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'block-vmdk.c')
-rw-r--r--block-vmdk.c105
1 files changed, 104 insertions, 1 deletions
diff --git a/block-vmdk.c b/block-vmdk.c
index f80bf07b75..3bbd1494fe 100644
--- a/block-vmdk.c
+++ b/block-vmdk.c
@@ -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,
};