From owner-svn-src-head@freebsd.org  Fri Apr 21 21:43:02 2017
Return-Path: <owner-svn-src-head@freebsd.org>
Delivered-To: svn-src-head@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 1E63CD4964A;
 Fri, 21 Apr 2017 21:43:02 +0000 (UTC)
 (envelope-from rmacklem@FreeBSD.org)
Received: from repo.freebsd.org (repo.freebsd.org
 [IPv6:2610:1c1:1:6068::e6a:0])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id E176CF06;
 Fri, 21 Apr 2017 21:43:01 +0000 (UTC)
 (envelope-from rmacklem@FreeBSD.org)
Received: from repo.freebsd.org ([127.0.1.37])
 by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id v3LLh1PA016664;
 Fri, 21 Apr 2017 21:43:01 GMT (envelope-from rmacklem@FreeBSD.org)
Received: (from rmacklem@localhost)
 by repo.freebsd.org (8.15.2/8.15.2/Submit) id v3LLh1bd016663;
 Fri, 21 Apr 2017 21:43:01 GMT (envelope-from rmacklem@FreeBSD.org)
Message-Id: <201704212143.v3LLh1bd016663@repo.freebsd.org>
X-Authentication-Warning: repo.freebsd.org: rmacklem set sender to
 rmacklem@FreeBSD.org using -f
From: Rick Macklem <rmacklem@FreeBSD.org>
Date: Fri, 21 Apr 2017 21:43:01 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: svn commit: r317272 - head/sys/fs/nfsclient
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
 <svn-src-head.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head/>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 21 Apr 2017 21:43:02 -0000

Author: rmacklem
Date: Fri Apr 21 21:43:00 2017
New Revision: 317272
URL: https://svnweb.freebsd.org/changeset/base/317272

Log:
  Add checks for failed operations to the NFSv4 client function nfscl_mtofh().
  
  The nfscl_mtofh() function didn't check for failed operations and, as such,
  would have returned EBADRPC for these cases, due to parsing failure.
  This patch adds checks, so that it returns with ND_NOMOREDATA set.
  This is needed for future use in the pNFS server and acts as a safety
  belt in the meantime.
  
  MFC after:	2 weeks

Modified:
  head/sys/fs/nfsclient/nfs_clcomsubs.c

Modified: head/sys/fs/nfsclient/nfs_clcomsubs.c
==============================================================================
--- head/sys/fs/nfsclient/nfs_clcomsubs.c	Fri Apr 21 21:06:11 2017	(r317271)
+++ head/sys/fs/nfsclient/nfs_clcomsubs.c	Fri Apr 21 21:43:00 2017	(r317272)
@@ -471,6 +471,11 @@ nfscl_mtofh(struct nfsrv_descript *nd, s
 		flag = fxdr_unsigned(int, *tl);
 	} else if (nd->nd_flag & ND_NFSV4) {
 		NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
+		/* If the GetFH failed, clear flag. */
+		if (*++tl != 0) {
+			nd->nd_flag |= ND_NOMOREDATA;
+			flag = 0;
+		}
 	}
 	if (flag) {
 		error = nfsm_getfh(nd, nfhpp);
@@ -481,8 +486,12 @@ nfscl_mtofh(struct nfsrv_descript *nd, s
 	/*
 	 * Now, get the attributes.
 	 */
-	if (nd->nd_flag & ND_NFSV4) {
+	if (flag != 0 && (nd->nd_flag & ND_NFSV4) != 0) {
 		NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
+		if (*++tl != 0) {
+			nd->nd_flag |= ND_NOMOREDATA;
+			flag = 0;
+		}
 	} else if (nd->nd_flag & ND_NFSV3) {
 		NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
 		if (flag) {