From patchwork Tue Sep 12 04:45:21 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ross Zwisler X-Patchwork-Id: 9948389 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id F03FE60360 for ; Tue, 12 Sep 2017 04:45:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E1F3628DF1 for ; Tue, 12 Sep 2017 04:45:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D6EDA28E08; Tue, 12 Sep 2017 04:45:59 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3B65128DF1 for ; Tue, 12 Sep 2017 04:45:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751045AbdILEpo (ORCPT ); Tue, 12 Sep 2017 00:45:44 -0400 Received: from mga02.intel.com ([134.134.136.20]:34591 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751354AbdILEpe (ORCPT ); Tue, 12 Sep 2017 00:45:34 -0400 Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Sep 2017 21:45:33 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.42,381,1500966000"; d="scan'208";a="127835440" Received: from theros.lm.intel.com ([10.232.112.77]) by orsmga004.jf.intel.com with ESMTP; 11 Sep 2017 21:45:32 -0700 From: Ross Zwisler To: fstests@vger.kernel.org, Eryu Guan Cc: Ross Zwisler , Andrew Morton , linux-kernel@vger.kernel.org, "Darrick J. Wong" , Theodore Ts'o , Christoph Hellwig , Dan Williams , Dave Chinner , Jan Kara , linux-ext4@vger.kernel.org, linux-nvdimm@lists.01.org, linux-xfs@vger.kernel.org, Andreas Dilger Subject: [PATCH 3/3] ext4: test for inline data + DAX corruption Date: Mon, 11 Sep 2017 22:45:21 -0600 Message-Id: <20170912044521.22644-3-ross.zwisler@linux.intel.com> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20170912044521.22644-1-ross.zwisler@linux.intel.com> References: <20170912044521.22644-1-ross.zwisler@linux.intel.com> Sender: fstests-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: fstests@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a regression test for the following kernel commit: ext4: prevent data corruption with inline data + DAX The test passes either if we don't encounter corruption, or if mounting with DAX + inline data fails. The latter is the way that we prevent this issue in the kernel. Signed-off-by: Ross Zwisler --- .gitignore | 1 + src/Makefile | 3 +- src/t_ext4_dax_inline_corruption.c | 70 +++++++++++++++++++++++++++++++ tests/ext4/031 | 84 ++++++++++++++++++++++++++++++++++++++ tests/ext4/031.out | 2 + tests/ext4/group | 1 + 6 files changed, 160 insertions(+), 1 deletion(-) create mode 100644 src/t_ext4_dax_inline_corruption.c create mode 100755 tests/ext4/031 create mode 100644 tests/ext4/031.out diff --git a/.gitignore b/.gitignore index 4bdc5bf..37670e6 100644 --- a/.gitignore +++ b/.gitignore @@ -155,6 +155,7 @@ /src/t_mmap_cow_race /src/t_mmap_fallocate /src/t_ext4_dax_journal_corruption +/src/t_ext4_dax_inline_corruption # dmapi/ binaries /dmapi/src/common/cmd/read_invis diff --git a/src/Makefile b/src/Makefile index e6558e2..bcfae01 100644 --- a/src/Makefile +++ b/src/Makefile @@ -13,7 +13,8 @@ TARGETS = dirstress fill fill2 getpagesize holes lstat64 \ multi_open_unlink dmiperf unwritten_sync genhashnames t_holes \ t_mmap_writev t_truncate_cmtime dirhash_collide t_rename_overwrite \ holetest t_truncate_self t_mmap_dio af_unix t_mmap_stale_pmd \ - t_mmap_cow_race t_mmap_fallocate fsync-err t_ext4_dax_journal_corruption + t_mmap_cow_race t_mmap_fallocate fsync-err t_ext4_dax_journal_corruption \ + t_ext4_dax_inline_corruption LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \ diff --git a/src/t_ext4_dax_inline_corruption.c b/src/t_ext4_dax_inline_corruption.c new file mode 100644 index 0000000..4b7d893 --- /dev/null +++ b/src/t_ext4_dax_inline_corruption.c @@ -0,0 +1,70 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define PAGE(a) ((a)*0x1000) +#define STRLEN 256 + +void err_exit(char *op) +{ + fprintf(stderr, "%s: %s\n", op, strerror(errno)); + exit(1); +} + +int main(int argc, char *argv[]) +{ + int fd, err, len = PAGE(1); + char *dax_data, *data; + char string[STRLEN]; + + if (argc < 2) { + printf("Usage: %s \n", basename(argv[0])); + exit(0); + } + + srand(time(NULL)); + snprintf(string, STRLEN, "random number %d\n", rand()); + + fd = open(argv[1], O_RDWR); + if (fd < 0) + err_exit("fd"); + + data = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); + if (!data) + err_exit("mmap data"); + + /* this fallocate turns off inline data and turns on DAX */ + fallocate(fd, 0, 0, PAGE(2)); + + dax_data = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); + if (!dax_data) + err_exit("mmap dax_data"); + + /* + * Write the data using the non-DAX mapping, and try and read it back + * using the DAX mapping. + */ + strcpy(data, string); + if (strcmp(dax_data, string) != 0) + printf("Data miscompare\n"); + + err = munmap(dax_data, len); + if (err < 0) + err_exit("munmap dax_data"); + + err = munmap(data, len); + if (err < 0) + err_exit("munmap data"); + + err = close(fd); + if (err < 0) + err_exit("close"); + return 0; +} diff --git a/tests/ext4/031 b/tests/ext4/031 new file mode 100755 index 0000000..95a5c65 --- /dev/null +++ b/tests/ext4/031 @@ -0,0 +1,84 @@ +#! /bin/bash +# FS QA Test ext4/031 +# +# This is a regression test for kernel patch: +# ext4: prevent data corruption with inline data + DAX +# created by Ross Zwisler +# +#----------------------------------------------------------------------- +# Copyright (c) 2017 Intel Corporation. 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 +#----------------------------------------------------------------------- +# + +seq=`basename $0` +seqres=$RESULT_DIR/$seq +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 + +# remove previous $seqres.full before test +rm -f $seqres.full + +# Modify as appropriate. +_supported_os Linux +_supported_fs ext4 +_require_scratch_dax +_require_test_program "t_ext4_dax_inline_corruption" + +# real QA test starts here +_scratch_mkfs_ext4 -O inline_data > $seqres.full 2>&1 + +TESTFILE=$SCRATCH_MNT/testfile + +# DAX needs to be off so we can create an inode with inline data +SAVE_MOUNT_OPTIONS="$MOUNT_OPTIONS" +MOUNT_OPTIONS="" +_scratch_mount >> $seqres.full 2>&1 + +echo "Need to make some inline data..." > $TESTFILE + +export MOUNT_OPTIONS="$SAVE_MOUNT_OPTIONS" + +_scratch_unmount >> $seqres.full 2>&1 +_scratch_mount "-o dax" >> $seqres.full 2>&1 + +if [[ $? != 0 ]]; then + # _require_scratch_dax already verified that we could mount with DAX. + # Failure here is expected because we have inline data. + echo "Silence is golden" + status=0 + exit +fi + +src/t_ext4_dax_inline_corruption $TESTFILE + +# success, all done +echo "Silence is golden" +status=0 +exit diff --git a/tests/ext4/031.out b/tests/ext4/031.out new file mode 100644 index 0000000..b3d0bb0 --- /dev/null +++ b/tests/ext4/031.out @@ -0,0 +1,2 @@ +QA output created by 031 +Silence is golden diff --git a/tests/ext4/group b/tests/ext4/group index ef768df..396f963 100644 --- a/tests/ext4/group +++ b/tests/ext4/group @@ -33,6 +33,7 @@ 028 auto quick fsmap 029 auto quick fsmap 030 auto quick +031 auto quick 271 auto rw quick 301 aio auto ioctl rw stress defrag 302 aio auto ioctl rw stress defrag