NFSD: Update WRITE3arg decoder to use struct xdr_stream

As part of the update, open code that sanity-checks the size of the
data payload against the length of the RPC Call message has to be
re-implemented to use xdr_stream infrastructure.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-10-22 11:14:55 -04:00
commit c43b2f229a