XFS_BLFT_UNKNOWN_BUF
ASSERT(type > XFS_BLFT_UNKNOWN_BUF && type < XFS_BLFT_MAX_BUF);
(xfs_blft_from_flags(&bip->__bli_format) > XFS_BLFT_UNKNOWN_BUF
type = XFS_BLFT_UNKNOWN_BUF;