NFS: Use xdr_stream-based XDR encoder for MNT's dirpath argument

Check the length of the supplied dirpath, and see that it fits
properly in the RPC buffer.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
1 file changed