From patchwork Thu May 20 09:23:10 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: 445361 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=-19.1 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 64F2EC4361B for ; Thu, 20 May 2021 11:03:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 43E2F6135C for ; Thu, 20 May 2021 11:03:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237932AbhETLFD (ORCPT ); Thu, 20 May 2021 07:05:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:57322 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239090AbhETLCK (ORCPT ); Thu, 20 May 2021 07:02:10 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 713E96142F; Thu, 20 May 2021 10:04:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621505044; bh=YQZY9+XmeIwini8Qsv6Kxgjjrli83jL9m/mbdQ8qRIc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q4VcoZ9XSiFvHPDU7/ynIsAyhBvU+UBsAhLk/F4n8Q3vLia8gT88t1nWE+QWlCczF jJhyfHiQtv1HCOyTLuINI8ZmBn1ULnKNXaMvyU/mn0NrN9uvw8WBzDM9Qq+8P1U2uq bPaQdylbVEnoEFlHf3KeHqouLasN/TlLyfn7DGhA= 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 4.9 198/240] NFSv4.2 fix handling of sr_eof in SEEKs reply Date: Thu, 20 May 2021 11:23:10 +0200 Message-Id: <20210520092115.303308078@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092108.587553970@linuxfoundation.org> References: <20210520092108.587553970@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Olga Kornievskaia [ Upstream commit 73f5c88f521a630ea1628beb9c2d48a2e777a419 ] Currently the client ignores the value of the sr_eof of the SEEK operation. According to the spec, if the server didn't find the requested extent and reached the end of the file, the server would return sr_eof=true. In case the request for DATA and no data was found (ie in the middle of the hole), then the lseek expects that ENXIO would be returned. Fixes: 1c6dcbe5ceff8 ("NFS: Implement SEEK") Signed-off-by: Olga Kornievskaia Signed-off-by: Trond Myklebust Signed-off-by: Sasha Levin --- fs/nfs/nfs42proc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c index 7e9fb1119bcf..7efb9e0e9f25 100644 --- a/fs/nfs/nfs42proc.c +++ b/fs/nfs/nfs42proc.c @@ -294,7 +294,10 @@ static loff_t _nfs42_proc_llseek(struct file *filep, if (status) return status; - return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); + if (whence == SEEK_DATA && res.sr_eof) + return -NFS4ERR_NXIO; + else + return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); } loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)