From patchwork Tue May 5 22:22:45 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anand Jain X-Patchwork-Id: 6346721 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 529709F1C2 for ; Wed, 6 May 2015 06:25:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6C7B820251 for ; Wed, 6 May 2015 06:25:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6A3C320225 for ; Wed, 6 May 2015 06:25:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751169AbbEFGZJ (ORCPT ); Wed, 6 May 2015 02:25:09 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:37970 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751079AbbEFGZI (ORCPT ); Wed, 6 May 2015 02:25:08 -0400 Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id t466P6RB016606 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 6 May 2015 06:25:07 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userv0021.oracle.com (8.13.8/8.13.8) with ESMTP id t466P6ro017743 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL); Wed, 6 May 2015 06:25:06 GMT Received: from abhmp0001.oracle.com (abhmp0001.oracle.com [141.146.116.7]) by userv0122.oracle.com (8.13.8/8.13.8) with ESMTP id t466P62e015651; Wed, 6 May 2015 06:25:06 GMT Received: from OL.sg.oracle.com (/10.186.101.34) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 05 May 2015 23:25:05 -0700 From: Anand Jain To: fstests@vger.kernel.org Cc: linux-btrfs@vger.kernel.org, david@fromorbit.com Subject: [PATCH v2.1 1/3] xfstests: btrfs: add functions to create dm-error device Date: Wed, 6 May 2015 06:22:45 +0800 Message-Id: <1430864565-25079-1-git-send-email-anand.jain@oracle.com> X-Mailer: git-send-email 2.0.0.153.g79dcccc In-Reply-To: <1430852599-22724-2-git-send-email-anand.jain@oracle.com> References: <1430852599-22724-2-git-send-email-anand.jain@oracle.com> X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Spam-Status: No, score=-5.4 required=5.0 tests=BAYES_00, DATE_IN_PAST_06_12, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Anand Jain Controlled EIO from the device is achieved using the dm device. Helper functions are at common/dmerror. Broadly steps will include calling _init_dmerror(). _init_dmerror() will use SCRATCH_DEV to create dm linear device and assign DMERROR_DEV to /dev/mapper/error-test. When test script is ready to get EIO, the test cases can call _load_dmerror_table() which then it will load the dm error. so that reading DMERROR_DEV will cause EIO. After the test case is complete, cleanup must be done by calling _cleanup_dmerror(). Signed-off-by: Anand Jain --- v2->v2.1: fixed missed typo error fixup in the commit. v1->v2: accepts Dave Chinner's review comments, thanks common/dmerror | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ common/rc | 15 +++++++++++++ 2 files changed, 84 insertions(+) create mode 100644 common/dmerror diff --git a/common/dmerror b/common/dmerror new file mode 100644 index 0000000..f895d90 --- /dev/null +++ b/common/dmerror @@ -0,0 +1,69 @@ +##/bin/bash +# +# Copyright (c) 2015 Oracle. 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 +# +# +# common functions for setting up and tearing down a dmerror device + +_init_dmerror() +{ + $DMSETUP_PROG remove error-test > /dev/null 2>&1 + + local BLK_DEV_SIZE=`blockdev --getsz $SCRATCH_DEV` + + DMERROR_DEV='/dev/mapper/error-test' + + DMLINEAR_TABLE="0 $BLK_DEV_SIZE linear $SCRATCH_DEV 0" + + $DMSETUP_PROG create error-test --table "$DMLINEAR_TABLE" || \ + _fatal "failed to create dm linear device" + + DMERROR_TABLE="0 $BLK_DEV_SIZE error $SCRATCH_DEV 0" +} + +_scratch_mkfs_dmerror() +{ + $MKFS_BTRFS_PROG $* $DMERROR_DEV >> $seqres.full 2>&1 || \ + _fatal "failed to create mkfs.btrfs $* $DMERROR_DEV" +} + +_mount_dmerror() +{ + mount -t $FSTYP $MOUNT_OPTIONS $DMERROR_DEV $SCRATCH_MNT +} + +_unmount_dmerror() +{ + $UMOUNT_PROGS $SCRATCH_MNT +} + +_cleanup_dmerror() +{ + $UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1 + $DMSETUP_PROG remove error-test > /dev/null 2>&1 +} + +_load_dmerror_table() +{ + $DMSETUP_PROG suspend error-test + [ $? -ne 0 ] && _fatal "failed to suspend error-test" + + $DMSETUP_PROG load error-test --table "$DMERROR_TABLE" + [ $? -ne 0 ] && _fatal "failed to load error table error-test" + + $DMSETUP_PROG resume error-test + [ $? -ne 0 ] && _fatal "failed to resume error-test" +} diff --git a/common/rc b/common/rc index c5db0dd..447ab7f 100644 --- a/common/rc +++ b/common/rc @@ -1305,6 +1305,21 @@ _require_block_device() fi } +# this test requires the device mapper error target +# +_require_dmerror() +{ + _require_command "$DMSETUP_PROG" dmsetup + + $DMSETUP_PROG targets | grep error >/dev/null 2>&1 + if [ $? -eq 0 ] + then + : + else + _notrun "This test requires dm error support" + fi +} + # this test requires the device mapper flakey target # _require_dm_flakey()