lblkno
#define lblkno(fs, loc) /* loc / bsize */ \
#define lblkno(imp, loc) ((loc) >> (imp)->im_bshift)
#define lblkno(fs, loc) /* calculates (loc / fs->fs_bsize) */ \
#define lblkno(udfmp, loc) ((loc) >> (udfmp)->bshift)
#define lblkno(fs, loc) /* calculates (loc / fs->fs_bsize) */ \