udf
struct udf udfs;
struct udf *udfs = &h->udh->udfs;
struct udf *udfs = &h->udh->udfs;
struct udf *udfs = &h->udh->udfs;
struct udf *udfs = &h->udh->udfs;
unsigned long udf:1;
#define fsbtodb(udf, blk) \
((blk) << udf->udf_l2d_shift)