From: Christoph Hellwig <hch@lst.de>
Date: Thu, 21 May 2020 19:46:35 +0200

based on the review of Davids patch to do something similar I dusted off
the series I had started a few days ago to move the memdup_user or
copy_from_user from the inidividual sockopts into sctp_setsockopt,
which is done with one patch per option, so it might suit Marcelo's
taste a bit better.  I did not start any work on getsockopt.

I think you and David still need to discuss how to move forward here,
there doesn't seem to be consensus yet.

Thanks.