ctl_get_lba_len
retval = ctl_get_lba_len(io2, &lba2, &len2);
retval = ctl_get_lba_len(io1, &lba1, &len1);
retval = ctl_get_lba_len(io1, &lba1, &len1);
retval = ctl_get_lba_len(io2, &lba2, &len2);
retval = ctl_get_lba_len((union ctl_io *)ctsio, &lba1, &len1);
static int ctl_get_lba_len(union ctl_io *io, uint64_t *lba, uint64_t *len);