xfs_dir3_block_header_check
xfs_failaddr_t xfs_dir3_block_header_check(struct xfs_buf *bp, xfs_ino_t owner);
fa = xfs_dir3_block_header_check(*bpp, owner);
if (xfs_dir3_block_header_check(bp, rd->sc->ip->i_ino) != NULL)