From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (Postfix) with ESMTP id B60997FA4 for ; Thu, 14 Mar 2013 16:40:22 -0500 (CDT) Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by relay2.corp.sgi.com (Postfix) with ESMTP id 9F9FF304043 for ; Thu, 14 Mar 2013 14:40:19 -0700 (PDT) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id QHKq7GnB8pwxKwpn for ; Thu, 14 Mar 2013 14:40:18 -0700 (PDT) Received: from int-mx12.intmail.prod.int.phx2.redhat.com (int-mx12.intmail.prod.int.phx2.redhat.com [10.5.11.25]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r2ELeI5r014661 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 14 Mar 2013 17:40:18 -0400 Received: from liberator.sandeen.net (ovpn01.gateway.prod.ext.phx2.redhat.com [10.5.9.1]) by int-mx12.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id r2ELeGtl000728 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO) for ; Thu, 14 Mar 2013 17:40:17 -0400 Message-ID: <514243C0.1000309@redhat.com> Date: Thu, 14 Mar 2013 16:40:16 -0500 From: Eric Sandeen MIME-Version: 1.0 Subject: [PATCH] xfstests: test writing to device node on an RO filesystem List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: xfs-oss we should be able to open device nodes for writing even if they live on a readonly filesytem. Signed-off-by: Eric Sandeen --- (I may have *cough* broken this on a backport once, hence the test) diff --git a/315 b/315 new file mode 100755 index 0000000..8b8ecc6 --- /dev/null +++ b/315 @@ -0,0 +1,79 @@ +#! /bin/bash +# FS QA Test No. 315 +# +# Test that we can write to a device node residing on a RO filesystem +# +#----------------------------------------------------------------------- +# Copyright (c) 2013 Red Hat, Inc. All Rights Reserved. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it would be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write the Free Software Foundation, +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +#----------------------------------------------------------------------- +# +# creator +owner=sandeen@redhat.com + +seq=`basename $0` +echo "QA output created by $seq" + +here=`pwd` +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + cd / + rm -f $tmp.* +} + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +# real QA test starts here + +# Modify as appropriate. +_supported_fs generic +_supported_os Linux +_require_scratch + +DEVNULL=$SCRATCH_MNT/devnull +DEVZERO=$SCRATCH_MNT/devzero + +_scratch_mount + +rm -f $DEVNULL $DEVZERO + +mknod $DEVNULL c 1 3 || _fail "Could not create devnull device" +mknod $DEVZERO c 1 5 || _fail "Could not create devzero device" + +_scratch_unmount || _fail "Could not unmount scratch device" +_scratch_mount -o ro || _fail "Could not remount scratch readonly" + +# We should be able to read & write to/from these devices even on an RO fs +echo "== try to create new file" +touch $SCRATCH_MNT/this_should_fail 2>&1 | _filter_scratch +echo "== prite to null device" +xfs_io -c "pwrite 0 512" /dev/null | _filter_xfs_io +echo "== pread from zero device" +xfs_io -c "pread 0 512" /dev/zero | _filter_xfs_io + +echo "== truncating write to null device" +echo foo >> $DEVNULL 2>&1 | _filter_scratch +echo "== appending write to null device" +echo foo >> $DEVNULL 2>&1 | _filter_scratch + +# success, all done +status=0 +exit diff --git a/315.out b/315.out new file mode 100644 index 0000000..d07c567 --- /dev/null +++ b/315.out @@ -0,0 +1,11 @@ +QA output created by 315 +== try to create new file +touch: cannot touch `SCRATCH_MNT/this_should_fail': Read-only file system +== prite to null device +wrote 512/512 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +== pread from zero device +read 512/512 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +== truncating write to null device +== appending write to null device diff --git a/group b/group index fcbdfb6..fd838ef 100644 --- a/group +++ b/group @@ -430,3 +430,4 @@ stress 305 aio dangerous enospc rw stress 313 auto quick 314 auto +315 auto rw _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs