Object *user_creatable_add_opts(QemuOpts *opts, Error **errp)
{
Visitor *v;
QDict *pdict;
Object *obj;
const char *id = qemu_opts_id(opts);
char *type = qemu_opt_get_del(opts, "qom-type");
if (!type) {
error_setg(errp, QERR_MISSING_PARAMETER, "qom-type");
return NULL;
}
if (!id) {
error_setg(errp, QERR_MISSING_PARAMETER, "id");
qemu_opt_set(opts, "qom-type", type, &error_abort);
g_free(type);
return NULL;
}
qemu_opts_set_id(opts, NULL);
pdict = qemu_opts_to_qdict(opts, NULL);
v = opts_visitor_new(opts);
obj = user_creatable_add_type(type, id, pdict, v, errp);
visit_free(v);
qemu_opts_set_id(opts, (char *) id);
qemu_opt_set(opts, "qom-type", type, &error_abort);
g_free(type);
qobject_unref(pdict);
return obj;
}
static int vpc_create(const char *filename, QemuOpts *opts, Error **errp)
{
uint8_t buf[1024];
VHDFooter *footer = (VHDFooter *) buf;
char *disk_type_param;
int i;
uint16_t cyls = 0;
uint8_t heads = 0;
uint8_t secs_per_cyl = 0;
int64_t total_sectors;
int64_t total_size;
int disk_type;
int ret = -EIO;
Error *local_err = NULL;
BlockDriverState *bs = NULL;
/* Read out options */
total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
disk_type_param = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
if (disk_type_param) {
if (!strcmp(disk_type_param, "dynamic")) {
disk_type = VHD_DYNAMIC;
} else if (!strcmp(disk_type_param, "fixed")) {
disk_type = VHD_FIXED;
} else {
ret = -EINVAL;
goto out;
}
} else {
disk_type = VHD_DYNAMIC;
}
ret = bdrv_create_file(filename, opts, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto out;
}
ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
&local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto out;
}
/*
* Calculate matching total_size and geometry. Increase the number of
* sectors requested until we get enough (or fail). This ensures that
* qemu-img convert doesn't truncate images, but rather rounds up.
*
* If the image size can't be represented by a spec conform CHS geometry,
* we set the geometry to 65535 x 16 x 255 (CxHxS) sectors and use
* the image size from the VHD footer to calculate total_sectors.
*/
total_sectors = MIN(VHD_MAX_GEOMETRY, total_size / BDRV_SECTOR_SIZE);
for (i = 0; total_sectors > (int64_t)cyls * heads * secs_per_cyl; i++) {
calculate_geometry(total_sectors + i, &cyls, &heads, &secs_per_cyl);
}
if ((int64_t)cyls * heads * secs_per_cyl == VHD_MAX_GEOMETRY) {
total_sectors = total_size / BDRV_SECTOR_SIZE;
/* Allow a maximum disk size of approximately 2 TB */
if (total_sectors > VHD_MAX_SECTORS) {
ret = -EFBIG;
goto out;
}
} else {
total_sectors = (int64_t)cyls * heads * secs_per_cyl;
total_size = total_sectors * BDRV_SECTOR_SIZE;
}
/* Prepare the Hard Disk Footer */
memset(buf, 0, 1024);
memcpy(footer->creator, "conectix", 8);
/* TODO Check if "qemu" creator_app is ok for VPC */
memcpy(footer->creator_app, "qemu", 4);
memcpy(footer->creator_os, "Wi2k", 4);
footer->features = cpu_to_be32(0x02);
footer->version = cpu_to_be32(0x00010000);
if (disk_type == VHD_DYNAMIC) {
footer->data_offset = cpu_to_be64(HEADER_SIZE);
} else {
footer->data_offset = cpu_to_be64(0xFFFFFFFFFFFFFFFFULL);
}
footer->timestamp = cpu_to_be32(time(NULL) - VHD_TIMESTAMP_BASE);
/* Version of Virtual PC 2007 */
footer->major = cpu_to_be16(0x0005);
footer->minor = cpu_to_be16(0x0003);
footer->orig_size = cpu_to_be64(total_size);
footer->current_size = cpu_to_be64(total_size);
footer->cyls = cpu_to_be16(cyls);
footer->heads = heads;
footer->secs_per_cyl = secs_per_cyl;
footer->type = cpu_to_be32(disk_type);
#if defined(CONFIG_UUID)
uuid_generate(footer->uuid);
#endif
footer->checksum = cpu_to_be32(vpc_checksum(buf, HEADER_SIZE));
if (disk_type == VHD_DYNAMIC) {
ret = create_dynamic_disk(bs, buf, total_sectors);
} else {
ret = create_fixed_disk(bs, buf, total_size);
}
out:
bdrv_unref(bs);
g_free(disk_type_param);
return ret;
}
