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=-14.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 A1940C43465 for ; Mon, 21 Sep 2020 16:57:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6255320C09 for ; Mon, 21 Sep 2020 16:57:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600707470; bh=lej9QhMUZOEJoSIhmR5Ga6B7vctYMZVw0Fpwlb1LJ90=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WwIKy2+gJbHhyXTd1w1IfAgsPRtbx0IvYltuCUOS2xelpEIinv4cLwBRNzft4/O12 tcskRE2g/SXN+xul6jZoPW4uelPDi+WiBJVv0fyyT/nhJJ37DyNgOWmzHCVQTHwYpj o+AuHN02LneDUCqnACgPCIsEr/USoIorTbP4oY+A= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730150AbgIUQ5t (ORCPT ); Mon, 21 Sep 2020 12:57:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:47346 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728881AbgIUQnA (ORCPT ); Mon, 21 Sep 2020 12:43:00 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E24312076B; Mon, 21 Sep 2020 16:42:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600706579; bh=lej9QhMUZOEJoSIhmR5Ga6B7vctYMZVw0Fpwlb1LJ90=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KH2rg/Cmiw+w/kbQcozXOuFn5f45C0bnnucurJNfKrWkGBKwvnQxZZyAYDThy+/ta S5bsPryxcAKCCOcF/Vl61LoPNM2rw3UM9a4xt3F58X2qA8/GgVKp6HTvsDoLDG8dW+ pn0Y3hLXmiBkUWT2FZwRTZIkQlFASCR6+hivmtUY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Olga Kornievskaia , Trond Myklebust , Sasha Levin Subject: [PATCH 5.8 010/118] NFSv4.1 handle ERR_DELAY error reclaiming locking state on delegation recall Date: Mon, 21 Sep 2020 18:27:02 +0200 Message-Id: <20200921162036.810585110@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200921162036.324813383@linuxfoundation.org> References: <20200921162036.324813383@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Olga Kornievskaia [ Upstream commit 3d7a9520f0c3e6a68b6de8c5812fc8b6d7a52626 ] A client should be able to handle getting an ERR_DELAY error while doing a LOCK call to reclaim state due to delegation being recalled. This is a transient error that can happen due to server moving its volumes and invalidating its file location cache and upon reference to it during the LOCK call needing to do an expensive lookup (leading to an ERR_DELAY error on a PUTFH). Signed-off-by: Olga Kornievskaia Signed-off-by: Trond Myklebust Signed-off-by: Sasha Levin --- fs/nfs/nfs4proc.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 45e0585e0667c..7f337188a2829 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -7271,7 +7271,12 @@ int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, err = nfs4_set_lock_state(state, fl); if (err != 0) return err; - err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); + do { + err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); + if (err != -NFS4ERR_DELAY) + break; + ssleep(1); + } while (err == -NFS4ERR_DELAY); return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); } -- 2.25.1