From patchwork Mon Mar 1 16:10:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 389552 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT 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 1F48EC433E0 for ; Mon, 1 Mar 2021 18:55:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D1D7464DEE for ; Mon, 1 Mar 2021 18:55:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240063AbhCASzj (ORCPT ); Mon, 1 Mar 2021 13:55:39 -0500 Received: from mail.kernel.org ([198.145.29.99]:54450 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237575AbhCAStl (ORCPT ); Mon, 1 Mar 2021 13:49:41 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 382F4651F8; Mon, 1 Mar 2021 17:20:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614619210; bh=SVvwAv75TrcbfHIFGGl1zVyBbXg6J0DTdJJ2z64Ys8o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jSnLJaxHnG8TfRNkDHypfxTNV8zxlHEcqNtvbgVCyKXBTbukqWcR5R+Wh9IMXT/+z FVGoRVVukL7a6valdUw67e06a0Ww3qt1z0f+KHuVzZMlH1lGai9H5GK1fzveXw0D7D RHLr/NKJtxbIiemLVzN+hdyTDUxm3is/F/pBooqQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zhi Li , "J. Bruce Fields" , Chuck Lever , Sasha Levin Subject: [PATCH 5.10 373/663] nfsd: register pernet ops last, unregister first Date: Mon, 1 Mar 2021 17:10:21 +0100 Message-Id: <20210301161200.307560829@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161141.760350206@linuxfoundation.org> References: <20210301161141.760350206@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: J. Bruce Fields [ Upstream commit bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7 ] These pernet operations may depend on stuff set up or torn down in the module init/exit functions. And they may be called at any time in between. So it makes more sense for them to be the last to be registered in the init function, and the first to be unregistered in the exit function. In particular, without this, the drc slab is being destroyed before all the per-net drcs are shut down, resulting in an "Objects remaining in nfsd_drc on __kmem_cache_shutdown()" warning in exit_nfsd. Reported-by: Zhi Li Fixes: 3ba75830ce17 "nfsd4: drc containerization" Signed-off-by: J. Bruce Fields Signed-off-by: Chuck Lever Signed-off-by: Sasha Levin --- fs/nfsd/nfsctl.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index f6d5d783f4a45..0759e589ab52b 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -1522,12 +1522,9 @@ static int __init init_nfsd(void) int retval; printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); - retval = register_pernet_subsys(&nfsd_net_ops); - if (retval < 0) - return retval; retval = register_cld_notifier(); if (retval) - goto out_unregister_pernet; + return retval; retval = nfsd4_init_slabs(); if (retval) goto out_unregister_notifier; @@ -1544,9 +1541,14 @@ static int __init init_nfsd(void) goto out_free_lockd; retval = register_filesystem(&nfsd_fs_type); if (retval) + goto out_free_exports; + retval = register_pernet_subsys(&nfsd_net_ops); + if (retval < 0) goto out_free_all; return 0; out_free_all: + unregister_pernet_subsys(&nfsd_net_ops); +out_free_exports: remove_proc_entry("fs/nfs/exports", NULL); remove_proc_entry("fs/nfs", NULL); out_free_lockd: @@ -1559,13 +1561,12 @@ out_free_slabs: nfsd4_free_slabs(); out_unregister_notifier: unregister_cld_notifier(); -out_unregister_pernet: - unregister_pernet_subsys(&nfsd_net_ops); return retval; } static void __exit exit_nfsd(void) { + unregister_pernet_subsys(&nfsd_net_ops); nfsd_drc_slab_free(); remove_proc_entry("fs/nfs/exports", NULL); remove_proc_entry("fs/nfs", NULL); @@ -1575,7 +1576,6 @@ static void __exit exit_nfsd(void) nfsd4_exit_pnfs(); unregister_filesystem(&nfsd_fs_type); unregister_cld_notifier(); - unregister_pernet_subsys(&nfsd_net_ops); } MODULE_AUTHOR("Olaf Kirch ");