xfs_bmbt_key_t
xfs_bmbt_key_t *prevp, *keyp;
xfs_bmbt_key_t *fkp;
xfs_bmbt_key_t *tkp;
xfs_bmbt_key_t *fkp;
xfs_bmbt_key_t *tkp;
.key_len = sizeof(xfs_bmbt_key_t),
return blocklen / (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t));