Initialize a struct xdr_stream for sending data.
void xdr_init_encode(struct xdr_stream * xdr, struct xdr_buf * buf, __be32 * p);
xdr
pointer to xdr_stream struct
buf
pointer to XDR buffer in which to encode data
p
current pointer inside XDR buffer
at the moment the RPC client only passes the length of our scratch buffer in the xdr_buf's header kvec. Previously this meant we needed to call xdr_adjust_iovec after encoding the data. With the new scheme, the xdr_stream manages the details of the buffer length, and takes care of adjusting the kvec length for us.