xdrmem_create (&xdr, data, sizeof data, XDR_ENCODE);
if (!xdr_guestfs_chunk (&xdr, &chunk)) {
error (g, "xdr_guestfs_chunk failed (buf = %p, len = %zu)", buf, len);
xdrmem_create (&xdr, data, sizeof data, XDR_ENCODE);
if (!xdr_guestfs_chunk (&xdr, &chunk)) {
error (g, "xdr_guestfs_chunk failed (buf = %p, len = %zu)", buf, len);