From patchwork Tue Jun 28 18:09:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chuck Lever III X-Patchwork-Id: 12898688 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87142C433EF for ; Tue, 28 Jun 2022 18:09:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234448AbiF1SJO (ORCPT ); Tue, 28 Jun 2022 14:09:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53586 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234428AbiF1SJN (ORCPT ); Tue, 28 Jun 2022 14:09:13 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8AA1A13E8E; Tue, 28 Jun 2022 11:09:12 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 34DAEB81F38; Tue, 28 Jun 2022 18:09:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 941D6C3411D; Tue, 28 Jun 2022 18:09:09 +0000 (UTC) Subject: [PATCH v2 31/31] NFSD: NFSv4 CLOSE should release an nfsd_file immediately From: Chuck Lever To: linux-nfs@vger.kernel.org, netdev@vger.kernel.org Cc: david@fromorbit.com, jlayton@redhat.com, tgraf@suug.ch Date: Tue, 28 Jun 2022 14:09:08 -0400 Message-ID: <165643974865.84360.14514065655454215617.stgit@manet.1015granger.net> In-Reply-To: <165643915086.84360.2809940286726976517.stgit@manet.1015granger.net> References: <165643915086.84360.2809940286726976517.stgit@manet.1015granger.net> User-Agent: StGit/1.5.dev2+g9ce680a5 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The last close of a file should enable other accessors to open and use that file immediately. Leaving the file open in the filecache prevents other users from accessing that file until the filecache garbage-collects the file -- sometimes that takes several seconds. Reported-by: Wang Yugui Link: https://bugzilla.linux-nfs.org/show_bug.cgi?387 Signed-off-by: Chuck Lever --- fs/nfsd/filecache.c | 18 ++++++++++++++++++ fs/nfsd/filecache.h | 1 + fs/nfsd/nfs4state.c | 4 ++-- 3 files changed, 21 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index cee2770e13e5..5c2a68489480 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -458,6 +458,24 @@ nfsd_file_put(struct nfsd_file *nf) nfsd_file_put_noref(nf); } +/** + * nfsd_file_close - Close an nfsd_file + * @nf: nfsd_file to close + * + * If this is the final reference for @nf, free it immediately. + * This reflects an on-the-wire CLOSE or DELEGRETURN into the + * VFS and exported filesystem. + */ +void nfsd_file_close(struct nfsd_file *nf) +{ + nfsd_file_put(nf); + if (refcount_dec_if_one(&nf->nf_ref)) { + nfsd_file_unhash(nf); + nfsd_file_lru_remove(nf); + nfsd_file_free(nf); + } +} + struct nfsd_file * nfsd_file_get(struct nfsd_file *nf) { diff --git a/fs/nfsd/filecache.h b/fs/nfsd/filecache.h index 5ce3fdf3b729..c1f28a0e9c0f 100644 --- a/fs/nfsd/filecache.h +++ b/fs/nfsd/filecache.h @@ -54,6 +54,7 @@ void nfsd_file_cache_shutdown(void); int nfsd_file_cache_start_net(struct net *net); void nfsd_file_cache_shutdown_net(struct net *net); void nfsd_file_put(struct nfsd_file *nf); +void nfsd_file_close(struct nfsd_file *nf); struct nfsd_file *nfsd_file_get(struct nfsd_file *nf); void nfsd_file_close_inode_sync(struct inode *inode); bool nfsd_file_is_cached(struct inode *inode); diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 3a05c095dfe5..9d1a3e131c49 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -820,9 +820,9 @@ static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) swap(f2, fp->fi_fds[O_RDWR]); spin_unlock(&fp->fi_lock); if (f1) - nfsd_file_put(f1); + nfsd_file_close(f1); if (f2) - nfsd_file_put(f2); + nfsd_file_close(f2); } }