Date:	Thu, 15 Jan 2015 07:28:32 -0500
From:	Brian Foster <bfoster@...hat.com>
To:	Namjae Jeon <namjae.jeon@...sung.com>
Cc:	"'Namjae Jeon'" <linkinjeon@...il.com>, david@...morbit.com,
	tytso@....edu, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org,
	xfs@....sgi.com, a.sangwan@...sung.com
Subject: Re: [PATCH v8 9/11] xfstests: generic/043: Test multiple fallocate
 insert/collapse range calls

On Thu, Jan 15, 2015 at 07:14:26PM +0900, Namjae Jeon wrote:
> 
> > > +_require_scratch
> > > +_require_xfs_io_command "fiemap"
> > > +_require_xfs_io_command "finsert"
> > > +_require_xfs_io_command "fcollapse"
> > > +_do_die_on_error=y
> > 
> > What is _do_die_on_error for? Seems like that's only relevant for using
> > _do()?
> > 
> > > +src=$SCRATCH_MNT/testfile
> > > +dest=$SCRATCH_MNT/testfile.dest
> > > +BLOCKS=100
> > > +BSIZE=`get_block_size $SCRATCH_MNT`
> > > +
> > 
> > rm -f $seqres.full
> > 
> > ... to clear out the old .full file.
> > 
> > > +_scratch_mkfs MKFS_OPTIONS >> $seqres.full 2>&1
> > 
> > You don't need MKFS_OPTIONS here. In fact, this currently causes a mkfs
> > failure (missing $) that we don't detect because we aren't checking that
> > the mkfs actually succeeds. All we need to do here is:
> > 
> > _scratch_mkfs >> $seqres.full 2>&1 || _fail "mkfs failed"
> > 
> > If you dig down into _scratch_mkfs(), you'll see that it already
> > includes $MKFS_OPTIONS and thus formats the fs as specified by the test
> > config.
> > 
> > It might also be a good idea to check that the _scratch_mount below
> > succeeds as well...
> > 
> > > +_scratch_mount >> $seqres.full 2>&1
> > > +length=$(($BLOCKS * $BSIZE))
> > > +
> > > +# Write file
> > > +$XFS_IO_PROG -f -c "pwrite 0 $length" -c fsync $src > /dev/null
> > > +cp $src $dest
> > > +
> > 
> > It seems quite unlikely for this to not create a single extent given the
> > smallish file size and freshly created fs, but who knows with various fs
> > types, test configurations, test device sizes, etc. Another option could
> > be to check the starting extent count and verify the ending extent count
> > matches, rather than assume hardcoded values of 1.
> > 
> > To be honest, even just including the starting extent count in the
> > golden output (e.g., add an fiemap command here as well) might be good
> > enough to distinguish that failure path from something going wrong in
> > the collapse path, should it ever occur.
> > 
> > > +# Insert alternate blocks
> > > +for (( j=0; j < $(($BLOCKS/2)); j++ )); do
> > > +	offset=$((($j*$BSIZE)*2))
> > > +	$XFS_IO_PROG -c "finsert $offset $BSIZE" $dest > /dev/null
> > > +done
> > > +
> > > +# Check if 100 extents are present
> > > +$XFS_IO_PROG -c "fiemap -v" $dest | grep "^ *[0-9]*:" |wc -l
> > > +
> > > +_check_scratch_fs
> > > +if [ $? -ne 0 ]; then
> > > +	status=1
> > > +	exit
> > > +fi
> > > +
> > > +# Collapse alternate blocks
> > > +for (( j=0; j < $(($BLOCKS/2)); j++ )); do
> > > +	offset=$((($j*$BSIZE)))
> > > +	$XFS_IO_PROG -c "fcollapse $offset $BSIZE" $dest > /dev/null
> > > +done
> > > +
> > > +# Check if 1 extents are present
> > > +$XFS_IO_PROG -c "fiemap -v" $dest | grep "^ *[0-9]*:" |wc -l
> > > +
> > > +# compare original file and test file.
> > > +cmp $src $dest || _fail "file bytes check failed"
> > > +
> > > +_check_scratch_fs
> > > +if [ $? -ne 0 ]; then
> > > +	status=1
> > > +	exit
> > > +fi
> > > +
> > > +umount $SCRATCH_MNT
> > > +
> > 
> > The scratch device is unmounted and checked after each test that uses it
> > so the above is unnecessary.
> I checked your each review points. and updated patch.
> 
> Could you please review below patch ?
> Thanks a lot!
> 
> ------------------------------------------------------------------------------
> Subject: [PATCH v9 9/11] xfstests: generic/043: Test multiple fallocate 
>  insert/collapse range calls
> 
> This testcase(043) tries to test finsert range a single alternate block
> mulitiple times and test merge code of collase range.
> 
> Signed-off-by: Namjae Jeon <namjae.jeon@...sung.com>
> Signed-off-by: Ashish Sangwan <a.sangwan@...sung.com>
> ---
>  tests/generic/043     |   96 +++++++++++++++++++++++++++++++++++++++++++++++++
>  tests/generic/043.out |    2 +
>  tests/generic/group   |    1 +
>  3 files changed, 99 insertions(+), 0 deletions(-)
>  create mode 100644 tests/generic/043
>  create mode 100644 tests/generic/043.out
> 
> diff --git a/tests/generic/043 b/tests/generic/043
> new file mode 100644
> index 0000000..a6f91ce
> --- /dev/null
> +++ b/tests/generic/043
> @@ -0,0 +1,96 @@
> +#! /bin/bash
> +# FS QA Test No. generic/043
> +#
> +# Test multiple fallocate insert/collapse range calls on same file.
> +# Call insert range a single alternate block multiple times until the file
> +# is left with 100 extents and as much number of extents. And Call collapse
> +# range about the previously inserted ranges to test merge code of collapse
> +# range. Also check for data integrity and file system consistency.
> +#-----------------------------------------------------------------------
> +# Copyright (c) 2014 Samsung Electronics.  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 "rm -f $tmp.*; exit \$status" 0 1 2 3 15
> +
> +# get standard environment, filters and checks
> +. ./common/rc
> +. ./common/filter
> +
> +# real QA test starts here
> +_supported_fs generic
> +_supported_os Linux
> +
> +_require_scratch
> +_require_xfs_io_command "fiemap"
> +_require_xfs_io_command "finsert"
> +_require_xfs_io_command "fcollapse"
> +_do_die_on_error=always

Still not sure what the above is for, but otherwise this one looks fine
to me:

Reviewed-by: Brian Foster <bfoster@...hat.com>

> +src=$SCRATCH_MNT/testfile
> +dest=$SCRATCH_MNT/testfile.dest
> +BLOCKS=100
> +BSIZE=`get_block_size $SCRATCH_MNT`
> +rm -f $seqres.full
> +
> +_scratch_mkfs >> $seqres.full 2>&1 || _fail "mkfs failed"
> +_scratch_mount || _fail "mount failed"
> +length=$(($BLOCKS * $BSIZE))
> +
> +# Write file
> +_do "$XFS_IO_PROG -f -c \"pwrite 0 $length\" -c fsync $src"
> +cp $src $dest
> +extent_before=`$XFS_IO_PROG -c "fiemap -v" $dest | grep "^ *[0-9]*:" |wc -l`
> +
> +# Insert alternate blocks
> +for (( j=0; j < $(($BLOCKS/2)); j++ )); do
> +	offset=$((($j*$BSIZE)*2))
> +	_do "$XFS_IO_PROG -c \"finsert $offset $BSIZE\" $dest"
> +done
> +
> +# Check if 100 extents are present
> +$XFS_IO_PROG -c "fiemap -v" $dest | grep "^ *[0-9]*:" |wc -l
> +
> +_check_scratch_fs
> +if [ $? -ne 0 ]; then
> +	status=1
> +	exit
> +fi
> +
> +# Collapse alternate blocks
> +for (( j=0; j < $(($BLOCKS/2)); j++ )); do
> +	offset=$((($j*$BSIZE)))
> +	_do "$XFS_IO_PROG -c \"fcollapse $offset $BSIZE\" $dest"
> +done
> +
> +extent_after=`$XFS_IO_PROG -c "fiemap -v" $dest | grep "^ *[0-9]*:" |wc -l`
> +if [ $extent_before -ne $extent_after ]; then
> +	echo "extents mismatched before = $extent_before after = $extent_after"
> +fi
> +
> +# compare original file and test file.
> +cmp $src $dest || _fail "file bytes check failed"
> +
> +# success, all done
> +status=0
> +exit
> diff --git a/tests/generic/043.out b/tests/generic/043.out
> new file mode 100644
> index 0000000..28427c5
> --- /dev/null
> +++ b/tests/generic/043.out
> @@ -0,0 +1,2 @@
> +QA output created by 043
> +100
> diff --git a/tests/generic/group b/tests/generic/group
> index c0944b3..0a10bdd 100644
> --- a/tests/generic/group
> +++ b/tests/generic/group
> @@ -45,6 +45,7 @@
>  040 auto quick prealloc
>  041 auto quick prealloc
>  042 auto quick prealloc
> +043 auto quick prealloc
>  053 acl repair auto quick
>  062 attr udf auto quick
>  068 other auto freeze dangerous stress
> -- 
> 1.7.7
> 
> 
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