NFSD: Update the NFSv2 READDIR argument decoder to use struct xdr_stream

As an additional clean up, move code not related to XDR decoding
into readdir's .pc_func call out.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-10-19 14:15:51 -04:00
commit 8688361ae2