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Message-ID: <547E7926.6030907@cn.fujitsu.com>
Date: Wed, 3 Dec 2014 10:44:54 +0800
From: Xiaoguang Wang <wangxg.fnst@...fujitsu.com>
To: Dave Chinner <david@...morbit.com>
CC: <fstests@...r.kernel.org>, <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH] ext4/004: add dump/restore test
hello,
Thanks, I'll send a new version today according to your comments.
Regards,
Xiaoguang Wang
On 12/01/2014 01:45 PM, Dave Chinner wrote:
> On Tue, Nov 25, 2014 at 06:21:09PM +0800, Xiaoguang Wang wrote:
>> This test case will first use fsstress to fill a file system, then
>> dump it to standard output and restore it from standard input, finally
>> check that the original contents and the new contents generated by
>> restore tool will be same.
>>
>> Signed-off-by: Xiaoguang Wang <wangxg.fnst@...fujitsu.com>
>> ---
>> common/config | 2 ++
>> common/rc | 7 ++++
>> tests/ext4/004 | 104 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>> tests/ext4/004.out | 7 ++++
>> tests/ext4/group | 3 +-
>> 5 files changed, 122 insertions(+), 1 deletion(-)
>> create mode 100755 tests/ext4/004
>> create mode 100644 tests/ext4/004.out
>>
>> diff --git a/common/config b/common/config
>> index 1cb08c0..8ea70ec 100644
>> --- a/common/config
>> +++ b/common/config
>> @@ -188,6 +188,8 @@ export LOGGER_PROG="`set_prog_path logger`"
>> export DBENCH_PROG="`set_prog_path dbench`"
>> export DMSETUP_PROG="`set_prog_path dmsetup`"
>> export WIPEFS_PROG="`set_prog_path wipefs`"
>> +export E2FS_DUMP_PROG="`set_prog_path dump`"
>> +export E2FS_RESTORE_PROG="`set_prog_path restore`"
>
> So now we have DUMPE2FS_PROG and E2FS_DUMP_PROG, which are different
> programs altogether but are going to be very easy to confuse.
>
> I would suggest that follow the convention of all the other *_PROG
> variables dump -> $DUMP_PROG is probably a good idea to avoid
> confusion.
>
>> # Generate a comparable xfsprogs version number in the form of
>> # major * 10000 + minor * 100 + release
>> diff --git a/common/rc b/common/rc
>> index d5e3aff..ef7939d 100644
>> --- a/common/rc
>> +++ b/common/rc
>> @@ -2258,6 +2258,13 @@ _require_fio()
>> [ $? -eq 0 ] || _notrun "$FIO_PROG too old, see $seqres.full"
>> }
>>
>> +# Check that dump/restore is present
>> +_require_dump_restore()
>> +{
>> + _require_command $E2FS_DUMP_PROG "dump"
>> + _require_command $E2FS_RESTORE_PROG "restore"
>> +}
>
> No need for the wrapper, just call _require_command directly.
>
>> +
>> # Does freeze work on this fs?
>> _require_freeze()
>> {
>> diff --git a/tests/ext4/004 b/tests/ext4/004
>> new file mode 100755
>> index 0000000..cbf35e5
>> --- /dev/null
>> +++ b/tests/ext4/004
>> @@ -0,0 +1,104 @@
>> +#! /bin/bash
>> +# FSQA Test No. 004
>> +#
>> +# Test "dump | restore"(as opposed to a tape)
>> +#
>> +#-----------------------------------------------------------------------
>> +# Copyright (c) 2014 Fujitsu. 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.*
>> + rm -rf $restore_dir
>> + rm -rf $dump_dir
>> + _scratch_unmount
>
> scratch does not need to be unmounted here, nor does it need to be
> cleaned up. Also, you have to assume that the previous run of the
> test did not clean up (i.e. system crashed before cleanup ran),
> so you are going to want to do the rm on $restore_dir as part of the
> test setup, not cleanup....
>
>> +}
>> +
>> +# get standard environment, filters and checks
>> +. ./common/rc
>> +. ./common/filter
>> +
>> +dump_dir=$SCRATCH_MNT/dump_restore_dir
>> +restore_dir=$TEST_DIR/dump_restore_dir
>> +
>> +_diff_compare()
>
> "_" prefix is for library functions (i.e. from common/...), not
> local functions.
>
>> +{
>> + echo "Comparing dump directory with restore directory"
>> + diff -rs $dump_dir $restore_dir >> $seqres.full 2>&1
>> + if [ $? -ne 0 ];then
>> + echo "Dump/Restore compare failed"
>> + exit
>> + fi
>> + echo "Dump/Restore compare success"
>> +}
>
> There is no need for this entire function. just running:
>
> diff -r $dump_dir $restore_dir
>
> will tell us everything. i.e. it is silent if both directories are
> the same, but will throw output if there are differences. That will
> output will cause the golden image match (and hence the test) to fail....
>
>> +
>> +_workout()
>> +{
>> + echo ""
>> + echo "Run fsstress"
>> + args=`_scale_fsstress_args -z -f creat=5 -f write=20 -f mkdir=5 -n 1000 -p 15 -d $dump_dir`
>> + echo "fsstress $args" >> $seqres.full
>> +
>> + $FSSTRESS_PROG $args >> $seqres.full 2>&1
>> +
>> + echo "start Dump/Restore"
>> + cd $TEST_DIR
>> +
>> + $E2FS_DUMP_PROG -0 -f - $dump_dir 2>/dev/null | $E2FS_RESTORE_PROG -urvf - >> $seqres.full 2>&1
>> + if [ $? -ne 0 ];then
>> + echo "Dump/Restore failed"
>> + exit
>
> _fail?
>
>> + else
>> + echo "Dump/Restore success"
>> + fi
>
> And there's no need to echo anything on success.
>
>> + rm -rf restoresymtable
>> + _diff_compare
>> +}
>
> No need to put all of this in a function.
>
>> +# real QA test starts here
>> +_supported_fs ext4
>> +_supported_os Linux
>> +
>> +_require_scratch
>> +_require_dump_restore
>
> _require_test
>
>> +
>> +rm -f $seqres.full
>> +
>> +_scratch_mkfs_sized $((512 * 1024 * 1024)) >> $seqres.full 2>&1
>> +_scratch_mount || _fail "couldn't mount fs"
>
> No need to check for mount failure.
>
>> +
>> +umount $TEST_DEV
>> +_test_mkfs >> $seqres.full 2>&1
>> +_test_mount
>
> No. That is just not allowed. The test device should *never* be
> mkfs'd by a test. It shouldn't even be unmounted. Prep should be
> just an rm...
>
> Cheers,
>
> Dave.
>
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