[v2] fstests: regression test for nocsum buffered read's repair
diff mbox

Message ID 1493400377-6215-1-git-send-email-bo.li.liu@oracle.com
State Not Applicable
Headers show

Commit Message

Liu Bo April 28, 2017, 5:26 p.m. UTC
This is to test whether buffered read retry-repair code is able to work in
raid1 case as expected.

Please note that without checksum, btrfs doesn't know if the data used to
repair is correct, so repair is more of resync which makes sure that both
of the copy has the same content.

Commit 20a7db8ab3f2 ("btrfs: add dummy callback for readpage_io_failed and drop
checks") introduced the regression.

The upstream fix is
	Btrfs: bring back repair during read

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
---
v2: - Add 'mkfs -b 1G' to limit filesystem size to 2G in raid1 profile so that
      we get a consistent output.

 tests/btrfs/143     | 197 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/btrfs/143.out |  39 +++++++++++
 tests/btrfs/group   |   1 +
 3 files changed, 237 insertions(+)
 create mode 100755 tests/btrfs/143
 create mode 100644 tests/btrfs/143.out

Comments

Filipe Manana May 2, 2017, 2:39 p.m. UTC | #1
On Fri, Apr 28, 2017 at 6:26 PM, Liu Bo <bo.li.liu@oracle.com> wrote:
> This is to test whether buffered read retry-repair code is able to work in
> raid1 case as expected.
>
> Please note that without checksum, btrfs doesn't know if the data used to
> repair is correct, so repair is more of resync which makes sure that both
> of the copy has the same content.
>
> Commit 20a7db8ab3f2 ("btrfs: add dummy callback for readpage_io_failed and drop
> checks") introduced the regression.
>
> The upstream fix is
>         Btrfs: bring back repair during read
>
> Signed-off-by: Liu Bo <bo.li.liu@oracle.com>

Reviewed-by: Filipe Manana <fdmanana@suse.com>

Just a comment below.

> ---
> v2: - Add 'mkfs -b 1G' to limit filesystem size to 2G in raid1 profile so that
>       we get a consistent output.
>
>  tests/btrfs/143     | 197 ++++++++++++++++++++++++++++++++++++++++++++++++++++
>  tests/btrfs/143.out |  39 +++++++++++
>  tests/btrfs/group   |   1 +
>  3 files changed, 237 insertions(+)
>  create mode 100755 tests/btrfs/143
>  create mode 100644 tests/btrfs/143.out
>
> diff --git a/tests/btrfs/143 b/tests/btrfs/143
> new file mode 100755
> index 0000000..70f3f9f
> --- /dev/null
> +++ b/tests/btrfs/143
> @@ -0,0 +1,197 @@
> +#! /bin/bash
> +# FS QA Test 143
> +#
> +# Regression test for btrfs buffered read's repair during read without checksum.
> +#
> +# This is to test whether buffered read retry-repair code is able to work in
> +# raid1 case as expected.
> +#
> +# Please note that without checksum, btrfs doesn't know if the data used to
> +# repair is correct, so repair is more of resync which makes sure that both
> +# of the copy has the same content.
> +#
> +# Commit 20a7db8ab3f2 ("btrfs: add dummy callback for readpage_io_failed and drop
> +# checks") introduced the regression.
> +#
> +# The upstream fix is
> +#        Btrfs: bring back repair during read
> +#
> +#-----------------------------------------------------------------------
> +# Copyright (c) 2017 Liu Bo.  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 $seqres.full
> +
> +# real QA test starts here
> +
> +# Modify as appropriate.
> +_supported_fs btrfs
> +_supported_os Linux
> +_require_scratch_dev_pool 2
> +
> +_require_btrfs_command inspect-internal dump-tree
> +_require_command "$FILEFRAG_PROG" filefrag
> +
> +# helpe to convert 'file offset' to btrfs logical offset
> +FILEFRAG_FILTER='
> +       if (/blocks? of (\d+) bytes/) {
> +               $blocksize = $1;
> +               next
> +       }
> +       ($ext, $logical, $physical, $length) =
> +               (/^\s*(\d+):\s+(\d+)..\s+\d+:\s+(\d+)..\s+\d+:\s+(\d+):/)
> +       or next;
> +       ($flags) = /.*:\s*(\S*)$/;
> +       print $physical * $blocksize, "#",
> +             $length * $blocksize, "#",
> +             $logical * $blocksize, "#",
> +             $flags, " "'
> +
> +# this makes filefrag output script readable by using a perl helper.
> +# output is one extent per line, with three numbers separated by '#'
> +# the numbers are: physical, length, logical (all in bytes)
> +# sample output: "1234#10#5678" -> physical 1234, length 10, logical 5678
> +_filter_extents()
> +{
> +       tee -a $seqres.full | $PERL_PROG -ne "$FILEFRAG_FILTER"
> +}
> +
> +_check_file_extents()
> +{
> +       cmd="filefrag -v $1"
> +       echo "# $cmd" >> $seqres.full
> +       out=`$cmd | _filter_extents`
> +       if [ -z "$out" ]; then
> +               return 1
> +       fi
> +       echo "after filter: $out" >> $seqres.full
> +       echo $out
> +       return 0
> +}
> +
> +_check_repair()
> +{
> +       filter=${1:-cat}
> +       dmesg | tac | sed -ne "0,\#run fstests $seqnum at $date_time#p" | tac | $filter | grep -q -e "read error corrected"
> +       if [ $? -eq 0 ]; then
> +               echo 1
> +       else
> +               echo 0
> +       fi
> +}
> +
> +_get_physical()
> +{
> +        # $1 is logical address
> +        # print chunk tree and find devid 2 which is $SCRATCH_DEV
> +        $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | grep $1 -A 6 | awk '($1 ~ /stripe/ && $3 ~ /devid/ && $4 ~ /1/) { print $6 }'
> +}
> +
> +SYSFS_BDEV=`_sysfs_dev $SCRATCH_DEV`
> +
> +start_fail()
> +{
> +       echo 100 > $DEBUGFS_MNT/fail_make_request/probability
> +       echo 4 > $DEBUGFS_MNT/fail_make_request/times
> +       echo 0 > $DEBUGFS_MNT/fail_make_request/verbose
> +       echo 1 > $SYSFS_BDEV/make-it-fail
> +}
> +
> +stop_fail()
> +{
> +       echo 0 > $DEBUGFS_MNT/fail_make_request/probability
> +       echo 0 > $DEBUGFS_MNT/fail_make_request/times
> +       echo 0 > $SYSFS_BDEV/make-it-fail
> +}
> +
> +_scratch_dev_pool_get 2
> +# step 1, create a raid1 btrfs which contains one 128k file.
> +echo "step 1......mkfs.btrfs" >>$seqres.full
> +
> +mkfs_opts="-d raid1 -b 1G"
> +_scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
> +
> +# -o nospace_cache makes sure data is written to the start position of the data
> +# chunk
> +_scratch_mount -o nospace_cache,nodatasum
> +
> +$XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" "$SCRATCH_MNT/foobar" | _filter_xfs_io
> +
> +sync

The sync is not necessary, since we cleanly unmount the fs below.

The test works now with a patched kernel and fails with an unpatched
kernel as expected.

Looks good to me, but FILEFRAG_FILTER, _filter_extents,
_check_file_extents, _get_physical and _check_repair are duplicated
across all the 4 test case files in the series. Could be factored into
common/btrfs later for example.

Thanks.

> +
> +# step 2, corrupt the first 64k of one copy (on SCRATCH_DEV which is the first
> +# one in $SCRATCH_DEV_POOL
> +echo "step 2......corrupt file extent" >>$seqres.full
> +
> +extents=`_check_file_extents $SCRATCH_MNT/foobar`
> +logical_in_btrfs=`echo ${extents} | cut -d '#' -f 1`
> +physical_on_scratch=`_get_physical ${logical_in_btrfs}`
> +
> +_scratch_unmount
> +$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $physical_on_scratch 64K" $SCRATCH_DEV | _filter_xfs_io
> +
> +_scratch_mount -o nospace_cache
> +
> +# step 3, 128k buffered read (this read can repair bad copy)
> +echo "step 3......repair the bad copy" >>$seqres.full
> +
> +# since raid1 consists of two copies, and the following read may read the good
> +# copy directly, so lets loop 10 times here and discard output that buffered
> +# reads give
> +for i in `seq 1 10`; do
> +       # start_fail only fails the following buffered read so the repair is
> +       # supposed to work.
> +       echo 3 > /proc/sys/vm/drop_caches
> +       start_fail
> +       $XFS_IO_PROG -c "pread -b 128K 0 128K" "$SCRATCH_MNT/foobar" > /dev/null
> +       stop_fail
> +       repair=`_check_repair`
> +       if [ $repair -eq 1 ]; then
> +               break
> +       fi
> +       echo "$repair" >> $seqres.full
> +done
> +
> +_scratch_unmount
> +
> +# check if the repair works
> +$XFS_IO_PROG -c "pread -v -b 512 $physical_on_scratch 512" $SCRATCH_DEV | _filter_xfs_io
> +
> +_scratch_dev_pool_put
> +# success, all done
> +status=0
> +exit
> diff --git a/tests/btrfs/143.out b/tests/btrfs/143.out
> new file mode 100644
> index 0000000..97bf45c
> --- /dev/null
> +++ b/tests/btrfs/143.out
> @@ -0,0 +1,39 @@
> +QA output created by 143
> +wrote 131072/131072 bytes at offset 0
> +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +wrote 65536/65536 bytes at offset 136708096
> +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> +08260000:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260010:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260020:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260030:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260040:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260050:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260060:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260070:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260080:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260090:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +082600a0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +082600b0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +082600c0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +082600d0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +082600e0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +082600f0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260100:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260110:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260120:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260130:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260140:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260150:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260160:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260170:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260180:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +08260190:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +082601a0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +082601b0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +082601c0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +082601d0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +082601e0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +082601f0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
> +read 512/512 bytes at offset 136708096
> +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> diff --git a/tests/btrfs/group b/tests/btrfs/group
> index a4f97cd..6f19619 100644
> --- a/tests/btrfs/group
> +++ b/tests/btrfs/group
> @@ -144,3 +144,4 @@
>  140 auto quick
>  141 auto quick
>  142 auto quick
> +143 auto quick
> --
> 2.5.0
>

Patch
diff mbox

diff --git a/tests/btrfs/143 b/tests/btrfs/143
new file mode 100755
index 0000000..70f3f9f
--- /dev/null
+++ b/tests/btrfs/143
@@ -0,0 +1,197 @@ 
+#! /bin/bash
+# FS QA Test 143
+#
+# Regression test for btrfs buffered read's repair during read without checksum.
+#
+# This is to test whether buffered read retry-repair code is able to work in
+# raid1 case as expected.
+#
+# Please note that without checksum, btrfs doesn't know if the data used to
+# repair is correct, so repair is more of resync which makes sure that both
+# of the copy has the same content.
+#
+# Commit 20a7db8ab3f2 ("btrfs: add dummy callback for readpage_io_failed and drop
+# checks") introduced the regression.
+#
+# The upstream fix is
+#        Btrfs: bring back repair during read
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2017 Liu Bo.  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 $seqres.full
+
+# real QA test starts here
+
+# Modify as appropriate.
+_supported_fs btrfs
+_supported_os Linux
+_require_scratch_dev_pool 2
+
+_require_btrfs_command inspect-internal dump-tree
+_require_command "$FILEFRAG_PROG" filefrag
+
+# helpe to convert 'file offset' to btrfs logical offset
+FILEFRAG_FILTER='
+	if (/blocks? of (\d+) bytes/) {
+		$blocksize = $1;
+		next
+	}
+	($ext, $logical, $physical, $length) =
+		(/^\s*(\d+):\s+(\d+)..\s+\d+:\s+(\d+)..\s+\d+:\s+(\d+):/)
+	or next;
+	($flags) = /.*:\s*(\S*)$/;
+	print $physical * $blocksize, "#",
+	      $length * $blocksize, "#",
+	      $logical * $blocksize, "#",
+	      $flags, " "'
+
+# this makes filefrag output script readable by using a perl helper.
+# output is one extent per line, with three numbers separated by '#'
+# the numbers are: physical, length, logical (all in bytes)
+# sample output: "1234#10#5678" -> physical 1234, length 10, logical 5678
+_filter_extents()
+{
+	tee -a $seqres.full | $PERL_PROG -ne "$FILEFRAG_FILTER"
+}
+
+_check_file_extents()
+{
+	cmd="filefrag -v $1"
+	echo "# $cmd" >> $seqres.full
+	out=`$cmd | _filter_extents`
+	if [ -z "$out" ]; then
+		return 1
+	fi
+	echo "after filter: $out" >> $seqres.full
+	echo $out
+	return 0
+}
+
+_check_repair()
+{
+	filter=${1:-cat}
+	dmesg | tac | sed -ne "0,\#run fstests $seqnum at $date_time#p" | tac | $filter | grep -q -e "read error corrected"
+	if [ $? -eq 0 ]; then
+		echo 1
+	else
+		echo 0
+	fi
+}
+
+_get_physical()
+{
+        # $1 is logical address
+        # print chunk tree and find devid 2 which is $SCRATCH_DEV
+        $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | grep $1 -A 6 | awk '($1 ~ /stripe/ && $3 ~ /devid/ && $4 ~ /1/) { print $6 }'
+}
+
+SYSFS_BDEV=`_sysfs_dev $SCRATCH_DEV`
+
+start_fail()
+{
+	echo 100 > $DEBUGFS_MNT/fail_make_request/probability
+	echo 4 > $DEBUGFS_MNT/fail_make_request/times
+	echo 0 > $DEBUGFS_MNT/fail_make_request/verbose
+	echo 1 > $SYSFS_BDEV/make-it-fail
+}
+
+stop_fail()
+{
+	echo 0 > $DEBUGFS_MNT/fail_make_request/probability
+	echo 0 > $DEBUGFS_MNT/fail_make_request/times
+	echo 0 > $SYSFS_BDEV/make-it-fail
+}
+
+_scratch_dev_pool_get 2
+# step 1, create a raid1 btrfs which contains one 128k file.
+echo "step 1......mkfs.btrfs" >>$seqres.full
+
+mkfs_opts="-d raid1 -b 1G"
+_scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
+
+# -o nospace_cache makes sure data is written to the start position of the data
+# chunk
+_scratch_mount -o nospace_cache,nodatasum
+
+$XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" "$SCRATCH_MNT/foobar" | _filter_xfs_io
+
+sync
+
+# step 2, corrupt the first 64k of one copy (on SCRATCH_DEV which is the first
+# one in $SCRATCH_DEV_POOL
+echo "step 2......corrupt file extent" >>$seqres.full
+
+extents=`_check_file_extents $SCRATCH_MNT/foobar`
+logical_in_btrfs=`echo ${extents} | cut -d '#' -f 1`
+physical_on_scratch=`_get_physical ${logical_in_btrfs}`
+
+_scratch_unmount
+$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $physical_on_scratch 64K" $SCRATCH_DEV | _filter_xfs_io
+
+_scratch_mount -o nospace_cache
+
+# step 3, 128k buffered read (this read can repair bad copy)
+echo "step 3......repair the bad copy" >>$seqres.full
+
+# since raid1 consists of two copies, and the following read may read the good
+# copy directly, so lets loop 10 times here and discard output that buffered
+# reads give
+for i in `seq 1 10`; do
+	# start_fail only fails the following buffered read so the repair is
+	# supposed to work.
+	echo 3 > /proc/sys/vm/drop_caches
+	start_fail
+	$XFS_IO_PROG -c "pread -b 128K 0 128K" "$SCRATCH_MNT/foobar" > /dev/null
+	stop_fail
+	repair=`_check_repair`
+	if [ $repair -eq 1 ]; then
+		break
+	fi
+	echo "$repair" >> $seqres.full
+done
+
+_scratch_unmount
+
+# check if the repair works
+$XFS_IO_PROG -c "pread -v -b 512 $physical_on_scratch 512" $SCRATCH_DEV | _filter_xfs_io
+
+_scratch_dev_pool_put
+# success, all done
+status=0
+exit
diff --git a/tests/btrfs/143.out b/tests/btrfs/143.out
new file mode 100644
index 0000000..97bf45c
--- /dev/null
+++ b/tests/btrfs/143.out
@@ -0,0 +1,39 @@ 
+QA output created by 143
+wrote 131072/131072 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 65536/65536 bytes at offset 136708096
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+08260000:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260010:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260020:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260030:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260040:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260050:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260060:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260070:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260080:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260090:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+082600a0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+082600b0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+082600c0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+082600d0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+082600e0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+082600f0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260100:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260110:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260120:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260130:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260140:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260150:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260160:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260170:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260180:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+08260190:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+082601a0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+082601b0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+082601c0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+082601d0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+082601e0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+082601f0:  aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa  ................
+read 512/512 bytes at offset 136708096
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
diff --git a/tests/btrfs/group b/tests/btrfs/group
index a4f97cd..6f19619 100644
--- a/tests/btrfs/group
+++ b/tests/btrfs/group
@@ -144,3 +144,4 @@ 
 140 auto quick
 141 auto quick
 142 auto quick
+143 auto quick