dm_task_create
if ((dmt_internal = dm_task_create(DM_DEVICE_CREATE)) == NULL)
struct dm_task *dm_task_create(int task_type);
if ((dmt = dm_task_create(DM_DEVICE_INFO)) == NULL)
if ((dmt = dm_task_create(DM_DEVICE_TABLE)) == NULL)
if ((dmt = dm_task_create(DM_DEVICE_REMOVE)) == NULL)
if ((dmt = dm_task_create(DM_DEVICE_CREATE)) == NULL) {