On Tue, Dec 5, 2017 at 5:50 PM, Chengguang Xu <cgxu519@xxxxxxxxxx> wrote:
> Run syncfs and shutdown upper filesystem to check syncfs result.
>
Sorry to be zigzagging you from generic to overlay and back, but the test
you wrote is completely generic, which is a good thing, so it belongs in
generic IMO.
Eryu?
> Signed-off-by: Chengguang Xu <cgxu519@xxxxxxxxxx>
> ---
> tests/overlay/045 | 107 ++++++++++++++++++++++++++++++++++++++++++++++++++
> tests/overlay/045.out | 2 +
> tests/overlay/group | 1 +
> 3 files changed, 110 insertions(+)
> create mode 100755 tests/overlay/045
> create mode 100644 tests/overlay/045.out
>
> diff --git a/tests/overlay/045 b/tests/overlay/045
> new file mode 100755
> index 0000000..402a955
> --- /dev/null
> +++ b/tests/overlay/045
> @@ -0,0 +1,107 @@
> +#! /bin/bash
> +# FS QA Test 045
> +#
> +# Inspired by syncfs bug of overlayfs.
> +# Run syncfs and shutdown upper filesystem to check syncfs result.
> +# Test will be skipped if underlying upper filesystem does not support
> +# shutdown or syncfs syscall.
> +#
> +#-----------------------------------------------------------------------
> +# Copyright (c) 2017 Chengguang Xu <cgxu519@xxxxxxxxxx>.
> +# 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=0
> +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 $seqres.full
> +
> +# real QA test starts here
> +
> +# Modify as appropriate.
> +_supported_fs overlay
> +_supported_os Linux
> +_require_test
> +_require_scratch
> +_require_scratch_shutdown
> +_require_xfs_io_command "syncfs"
> +
> +# if error
> +
> +PREFIX=${seq}-testfile
> +TESTFILES=${PREFIX}-*
> +FCNT=1000
> +
> +write_data()
> +{
> + if [ $1 -eq 0 ]; then
> + TARGET=$TEST_DIR
> + else
> + TARGET=$SCRATCH_MNT
> + fi
> +
> + rm -f $TARGET/$TESTFILES >/dev/null 2>&1
> + for i in `seq 1 $FCNT`; do
> + $XFS_IO_PROG -f -c "pwrite 1K 1K" \
> + ${TARGET}/${PREFIX}-$i >/dev/null 2>&1
> + done
> +}
> +
> +
> +check_data()
> +{
> + diff -r $TEST_DIR $SCRATCH_MNT
TEST_DIR is typically filled with other stuff, so this won't work.
I would have gone for md5sum -c $TEST_DIR/$seq-md5, but diff
is fine as long as you keep it contained inside $TEST_DIR/$seq-dir
or something.
> + if [ $? -ne 0 ]; then
> + status=1
> + fi
> +}
> +
> +_scratch_mkfs >/dev/null 2>&1
> +_scratch_mount
> +
> +write_data 0
Why 0/1? pass the TARGET path as argument.
Or use md5sum instead or writing twice.
> +echo 3 > /proc/sys/vm/drop_caches
Why is this needed? if it is really needed add a comment why
> +
> +write_data 1
> +$XFS_IO_PROG -c "syncfs" $SCRATCH_MNT/${PREFIX}-${FCNT} >/dev/null 2>&1
> +
> +_scratch_shutdown
> +_scratch_cycle_mount
> +check_data
> +
> +rm -f $TEST_DIR/$TESTFILES >/dev/null 2>&1
> +rm -f $SCRATCH_MNT/$TESTFILES >/dev/null 2>&1
In TEST_DIR we leave garbage behind on purpose, clean the dir (e.g. $seq-dir)
on test start.
scratch gets formatted so you don't need to clean it.
> +
> +echo "Silence is golden"
> +exit
> diff --git a/tests/overlay/045.out b/tests/overlay/045.out
> new file mode 100644
> index 0000000..66276cf
> --- /dev/null
> +++ b/tests/overlay/045.out
> @@ -0,0 +1,2 @@
> +QA output created by 045
> +Silence is golden
> diff --git a/tests/overlay/group b/tests/overlay/group
> index b32c6cd..eccd7d0 100644
> --- a/tests/overlay/group
> +++ b/tests/overlay/group
> @@ -47,3 +47,4 @@
> 042 auto quick copyup hardlink
> 043 auto quick copyup nonsamefs
> 044 auto quick copyup hardlink nonsamefs
> +045 auto quick sync
Shutdown group seems in order.
Thanks,
Amir.
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