From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7D12C46464 for ; Tue, 6 Nov 2018 18:35:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9615320827 for ; Tue, 6 Nov 2018 18:35:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9615320827 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387848AbeKGEBp (ORCPT ); Tue, 6 Nov 2018 23:01:45 -0500 Received: from mx1.redhat.com ([209.132.183.28]:60922 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387905AbeKGEBp (ORCPT ); Tue, 6 Nov 2018 23:01:45 -0500 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 129123082A31; Tue, 6 Nov 2018 18:35:12 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-123-119.rdu2.redhat.com [10.10.123.119]) by smtp.corp.redhat.com (Postfix) with ESMTP id E15541948B; Tue, 6 Nov 2018 18:35:11 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id 6789F20BE2; Tue, 6 Nov 2018 13:35:11 -0500 (EST) From: Scott Mayhew To: bfields@fieldses.org, jlayton@kernel.org Cc: linux-nfs@vger.kernel.org Subject: [PATCH RFC 0/4] un-deprecate nfsdcld Date: Tue, 6 Nov 2018 13:35:07 -0500 Message-Id: <20181106183511.17836-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.45]); Tue, 06 Nov 2018 18:35:12 +0000 (UTC) Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org When nfsdcld was released, it was quickly deprecated in favor of the nfsdcltrack usermodehelper, so as to not require another running daemon. That prevents NFSv4 clients from reclaiming locks from nfsd's running in containers, since neither nfsdcltrack nor the legacy client tracking code work in containers. These patches un-deprecate the use of nfsdcld for NFSv4 client tracking. These patches are intended to go alongside some nfs-utils patches that introduce an enhancement that allows nfsd to "slurp" up the client records during client tracking initialization and store them internally in hash table. This enables nfsd to check whether an NFSv4 client is allowed to reclaim without having to do an upcall to nfsdcld. It also allows nfsd to decide to end the v4 grace period early if the number of RECLAIM_COMPLETE operations it has received from "known" clients is equal to the number of entries in the hash table. It also allows nfsd to skip the v4 grace period altogether if it knows there are no clients allowed to reclaim. There is a fallback to allow nfsd to continue to work with older nfsdcld daemons in the event that any are out in the wild (unlikely). Everything should work fine except nfsd will not be able to exit the grace period early or skip the grace period altogether. Scott Mayhew (4): nfsd: fix a warning in __cld_pipe_upcall() nfsd: make nfs4_client_reclaim use an xdr_netobj instead of a fixed char array nfsd: un-deprecate nfsdcld nfsd: keep a tally of RECLAIM_COMPLETE operations when using nfsdcld fs/nfsd/netns.h | 3 + fs/nfsd/nfs4recover.c | 326 ++++++++++++++++++++++++++++++---- fs/nfsd/nfs4state.c | 82 +++++++-- fs/nfsd/nfsctl.c | 1 + fs/nfsd/state.h | 8 +- include/uapi/linux/nfsd/cld.h | 1 + 6 files changed, 372 insertions(+), 49 deletions(-) -- 2.17.1