void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
                         void *opaque)
{
    BlockDriver *drv;

    QLIST_FOREACH(drv, &bdrv_drivers, list) {
        it(opaque, drv->format_name);
    }
}
void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
                         void *opaque)
{
    BlockDriver *drv;

    QLIST_FOREACH(drv, &bdrv_drivers, list) {
        it(opaque, drv->format_name);
    }
}