xfs_bmap_last_before
int xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip,
error = xfs_bmap_last_before(tp, dp, &lastoff, w);
if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) {
if ((error = xfs_bmap_last_before(tp, dp, &fo, XFS_DATA_FORK))) {
error = xfs_bmap_last_before(rd->sc->tp, dp, &last, XFS_DATA_FORK);