hammer_get_volume
hammer_volume_t hammer_get_volume(hammer_mount_t hmp,
volume = hammer_get_volume(hmp, vol_no, &error);
volume = hammer_get_volume(hmp, vol_no, &error);
volume = hammer_get_volume(hmp, vol_no, &error);
volume = hammer_get_volume(hmp, vol_no, errorp);
volume = hammer_get_volume(hmp, vol_no, &ret_error);
volume = hammer_get_volume(hmp, vol_no, &error);
volume = hammer_get_volume(hmp, free_vol_no, &error);
volume = hammer_get_volume(hmp, vol_no, &error);
volume = hammer_get_volume(hmp, i, &error);
volume = hammer_get_volume(hmp, vol_no, &error);