From patchwork Wed Jun 2 20:06:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "J. Bruce Fields" X-Patchwork-Id: 12295621 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=-17.3 required=3.0 tests=BAYES_00,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_SANE_1 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 068D5C4708F for ; Wed, 2 Jun 2021 20:06:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D9142613AE for ; Wed, 2 Jun 2021 20:06:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229604AbhFBUIX (ORCPT ); Wed, 2 Jun 2021 16:08:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58284 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229491AbhFBUIX (ORCPT ); Wed, 2 Jun 2021 16:08:23 -0400 Received: from fieldses.org (fieldses.org [IPv6:2600:3c00:e000:2f7::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 93080C06174A for ; Wed, 2 Jun 2021 13:06:39 -0700 (PDT) Received: by fieldses.org (Postfix, from userid 2815) id 2AD381504; Wed, 2 Jun 2021 16:06:39 -0400 (EDT) DKIM-Filter: OpenDKIM Filter v2.11.0 fieldses.org 2AD381504 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fieldses.org; s=default; t=1622664399; bh=UvHJO9Z7G5dy2g+RkhXdMP0YWbL3xe2eieEUe8maNQI=; h=Date:To:Subject:From:From; b=m9IPLSD095FWmsCosEW25mdF7R6/yTuufoGd9iMXv9a4ko04nhev9jF0dv4EHB9YY MPX5FDqkfcGpBI6bgNhnl+NoI1Tnp1qwvks7O28Y0/haSuj/9VKQ3bacAnfwPLbDG/ unOiO+z2ashhHV8pfmZ0+vLOaE/NicO09ZGhsbe4= Date: Wed, 2 Jun 2021 16:06:39 -0400 To: linux-nfs@vger.kernel.org Subject: [PATCH] nfsd: move fsnotify on client creation outside spinlock Message-ID: <20210602200639.GC6995@fieldses.org> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) From: bfields@fieldses.org (J. Bruce Fields) Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: "J. Bruce Fields" This was causing a "sleeping function called from invalid context" warning. I don't think we need the set_and_test_bit() here; clients move from unconfirmed to confirmed only once, under the client_lock. The (conf == unconf) is a way to check whether we're in that confirming case, hopefully that's not too obscure. Fixes: 472d155a0631 "nfsd: report client confirmation status in "info" file" Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4state.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 99dfc668f605..c01ecb7b3fd3 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -2824,11 +2824,8 @@ move_to_confirmed(struct nfs4_client *clp) list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); add_clp_to_name_tree(clp, &nn->conf_name_tree); - if (!test_and_set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) { - trace_nfsd_clid_confirmed(&clp->cl_clientid); - if (clp->cl_nfsd_dentry && clp->cl_nfsd_info_dentry) - fsnotify_dentry(clp->cl_nfsd_info_dentry, FS_MODIFY); - } + set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); + trace_nfsd_clid_confirmed(&clp->cl_clientid); renew_client_locked(clp); } @@ -3487,6 +3484,8 @@ nfsd4_create_session(struct svc_rqst *rqstp, /* cache solo and embedded create sessions under the client_lock */ nfsd4_cache_create_session(cr_ses, cs_slot, status); spin_unlock(&nn->client_lock); + if (conf == unconf) + fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY); /* init connection and backchannel */ nfsd4_init_conn(rqstp, conn, new); nfsd4_put_session(new); @@ -4095,6 +4094,8 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, } get_client_locked(conf); spin_unlock(&nn->client_lock); + if (conf == unconf) + fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY); nfsd4_probe_callback(conf); spin_lock(&nn->client_lock); put_client_renew_locked(conf);