From patchwork Mon May 4 17:57:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 226415 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 B343DC3A5A9 for ; Mon, 4 May 2020 18:03:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 955E82073B for ; Mon, 4 May 2020 18:03:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588615423; bh=EDuFdQ8OJTSvFYRyENsSd//nuLUV5HFFKR4Cj6SGVTQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=CdrerF4VQrHqQvurTbVqh+lBkOCipLOwcjt+HwRL2X1sa103LgDwoM5mk3BWwuPj9 MY8MTotggSsKFNiIpT6Py16WcBoXIO/hzoGs6OgaRLVUIZ+wrULghC0shM1a2Bbdl7 LbLFCl5dXDB0dLvM9FUQaX+YKIFwOYDXpqyjkRHQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730993AbgEDSDl (ORCPT ); Mon, 4 May 2020 14:03:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:60886 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731535AbgEDSDi (ORCPT ); Mon, 4 May 2020 14:03:38 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 A4C61206B8; Mon, 4 May 2020 18:03:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588615418; bh=EDuFdQ8OJTSvFYRyENsSd//nuLUV5HFFKR4Cj6SGVTQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NtBrUzC7+Co9n+vffAkKzfHltO5VdFm1V1zgksw9dxc/Fmf9mik8kKDEj7NbwXTVo uhZcI9gO9bt2WEJQS6+cU4yowbOtVwbfAvcU3/3vqq2h5Rc/5p8EhhE8nEAlLuRm6H RoJXJ8Zw73thCPq9Jnqzn68hCG6C5Ar588yo1oGA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Olga Kornievskaia , Trond Myklebust Subject: [PATCH 5.4 07/57] NFSv4.1: fix handling of backchannel binding in BIND_CONN_TO_SESSION Date: Mon, 4 May 2020 19:57:11 +0200 Message-Id: <20200504165457.192577326@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200504165456.783676004@linuxfoundation.org> References: <20200504165456.783676004@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Olga Kornievskaia commit dff58530c4ca8ce7ee5a74db431c6e35362cf682 upstream. Currently, if the client sends BIND_CONN_TO_SESSION with NFS4_CDFC4_FORE_OR_BOTH but only gets NFS4_CDFS4_FORE back it ignores that it wasn't able to enable a backchannel. To make sure, the client sends BIND_CONN_TO_SESSION as the first operation on the connections (ie., no other session compounds haven't been sent before), and if the client's request to bind the backchannel is not satisfied, then reset the connection and retry. Cc: stable@vger.kernel.org Signed-off-by: Olga Kornievskaia Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman --- fs/nfs/nfs4proc.c | 8 ++++++++ include/linux/nfs_xdr.h | 2 ++ include/linux/sunrpc/clnt.h | 5 +++++ 3 files changed, 15 insertions(+) --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -7852,6 +7852,7 @@ static void nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) { struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; + struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; struct nfs_client *clp = args->client; switch (task->tk_status) { @@ -7860,6 +7861,12 @@ nfs4_bind_one_conn_to_session_done(struc nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); } + if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && + res->dir != NFS4_CDFS4_BOTH) { + rpc_task_close_connection(task); + if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) + rpc_restart_call(task); + } } static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { @@ -7882,6 +7889,7 @@ int nfs4_proc_bind_one_conn_to_session(s struct nfs41_bind_conn_to_session_args args = { .client = clp, .dir = NFS4_CDFC4_FORE_OR_BOTH, + .retries = 0, }; struct nfs41_bind_conn_to_session_res res; struct rpc_message msg = { --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1307,11 +1307,13 @@ struct nfs41_impl_id { struct nfstime4 date; }; +#define MAX_BIND_CONN_TO_SESSION_RETRIES 3 struct nfs41_bind_conn_to_session_args { struct nfs_client *client; struct nfs4_sessionid sessionid; u32 dir; bool use_conn_in_rdma_mode; + int retries; }; struct nfs41_bind_conn_to_session_res { --- a/include/linux/sunrpc/clnt.h +++ b/include/linux/sunrpc/clnt.h @@ -237,5 +237,10 @@ static inline int rpc_reply_expected(str (task->tk_msg.rpc_proc->p_decode != NULL); } +static inline void rpc_task_close_connection(struct rpc_task *task) +{ + if (task->tk_xprt) + xprt_force_disconnect(task->tk_xprt); +} #endif /* __KERNEL__ */ #endif /* _LINUX_SUNRPC_CLNT_H */