On Thu, Jul 22, 2021 at 07:46:34PM +0300, Amir Goldstein wrote:
> Overlayfs copies up a subset of lower file attributes since kernel
> commits:
> 173ff5c9ec37 ("ovl: consistent behavior for immutable/append-only inodes")
> 2e3f6e87c2b0 ("ovl: copy up sync/noatime fileattr flags")
>
> This test verifies this functionality works correctly and that it
> survives power failure and/or mount cycle.
Just out of curiosity -- is this supposed to succeed with a 5.14-rc4
kernel? I noticed a massive regression with this week's fstests,
probably because something didn't get cleaned up properly:
--- overlay/078.out
+++ overlay/078.out.bad
@@ -1,2 +1,17 @@
QA output created by 078
Silence is golden
+Before copy up: -------A-------------- /opt/ovl-mnt/testfile
+After copy up: ---------------------- /opt/ovl-mnt/testfile
+Before copy up: -------A-------------- /opt/ovl-mnt/testfile
+After copy up: ---------------------- /opt/ovl-mnt/testfile
+Before copy up: --S----A-------------- /opt/ovl-mnt/testfile
+After copy up: ---------------------- /opt/ovl-mnt/testfile
+Before copy up: --S----A-------------- /opt/ovl-mnt/testfile
+After copy up: ---------------------- /opt/ovl-mnt/testfile
+Before copy up: --S--a-A-------------- /opt/ovl-mnt/testfile
+After copy up: ---------------------- /opt/ovl-mnt/testfile
+Before copy up: --S--a-A-------------- /opt/ovl-mnt/testfile
+After copy up: ---------------------- /opt/ovl-mnt/testfile
+rm: cannot remove '/opt/ovl-upper/testfile': Operation not permitted
+rm: cannot remove
'/opt/ovl-work/index/00fb2100812f1a30dc474847dbad5281308293ece9030e00020000000054816fd1':
Operation not permitted
+Write unexpectedly returned 0 for file with attribute 'i'
and then the tests after it (e.g. generic/030) fail with:
+mount: /opt/ovl-mnt: mount(2) system call failed: Stale file handle.
+mount failed
+(see /var/tmp/fstests/generic/030.full for details)
--D
>
> Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
> ---
>
> Eryu,
>
> This test is failing on master and passes on overlayfs-next.
>
> Thanks,
> Amir.
>
> tests/overlay/078 | 145 ++++++++++++++++++++++++++++++++++++++++++
> tests/overlay/078.out | 2 +
> 2 files changed, 147 insertions(+)
> create mode 100755 tests/overlay/078
> create mode 100644 tests/overlay/078.out
>
> diff --git a/tests/overlay/078 b/tests/overlay/078
> new file mode 100755
> index 00000000..b43449d1
> --- /dev/null
> +++ b/tests/overlay/078
> @@ -0,0 +1,145 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2018 Huawei. All Rights Reserved.
> +# Copyright (C) 2021 CTERA Networks. All Rights Reserved.
> +#
> +# FS QA Test 078
> +#
> +# Test copy up of lower file attributes.
> +#
> +# Overlayfs copies up a subset of lower file attributes since kernel commits:
> +# 173ff5c9ec37 ("ovl: consistent behavior for immutable/append-only inodes")
> +# 2e3f6e87c2b0 ("ovl: copy up sync/noatime fileattr flags")
> +#
> +# This test is similar and was derived from generic/507, but instead
> +# of creating new files which are created in upper layer, prepare
> +# the file with attributes in lower layer and verify that attributes
> +# are not lost during copy up, (optional) shutdown and mount cycle.
> +#
> +. ./common/preamble
> +_begin_fstest auto quick perms shutdown
> +
> +# Override the default cleanup function.
> +_cleanup()
> +{
> + cd /
> + $CHATTR_PROG -ai $lowertestfile &> /dev/null
> + rm -f $tmp.*
> +}
> +
> +# Import common functions.
> +. ./common/filter
> +
> +# real QA test starts here
> +_supported_fs generic
> +
> +_require_command "$LSATTR_PROG" lasttr
> +_require_command "$CHATTR_PROG" chattr
> +_require_chattr ASai
> +_require_xfs_io_command "syncfs"
> +
> +_require_scratch
> +_require_scratch_shutdown
> +
> +lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
> +upperdir=$OVL_BASE_SCRATCH_MNT/$OVL_UPPER
> +workdir=$OVL_BASE_SCRATCH_MNT/$OVL_WORK
> +lowertestfile=$lowerdir/testfile
> +testfile=$SCRATCH_MNT/testfile
> +
> +_scratch_mkfs
> +mkdir -p $lowerdir
> +touch $lowertestfile
> +_scratch_mount
> +
> +# Set another flag on lowertestfile and verify all flags
> +# are kept though copy up (optional shutdown) and mount cycle
> +do_check()
> +{
> + attr=$1
> +
> + echo "Test chattr +$1 $2" >> $seqres.full
> +
> + $UMOUNT_PROG $SCRATCH_MNT
> +
> + # Add attribute to lower file
> + $CHATTR_PROG +$attr $lowertestfile
> +
> + # Re-create upperdir/workdir
> + rm -rf $upperdir $workdir
> + mkdir -p $upperdir $workdir
> +
> + if [ "$2" == "shutdown" ]; then
> + $XFS_IO_PROG -r $lowertestfile -c "fsync" | _filter_xfs_io
> + fi
> +
> + _scratch_mount
> +
> + before=`$LSATTR_PROG $testfile`
> +
> + # Write file in append mode to test copy up of append-only attribute
> + # Expect failure on write to immutable file
> + expect=0
> + if [ "$1" == "i" ]; then
> + expect=1
> + fi
> + $XFS_IO_PROG -a -c "pwrite -S 0x61 0 10" $testfile >> $seqres.full 2>&1
> + result=$?
> + if [ $result != $expect ]; then
> + echo "Write unexpectedly returned $result for file with attribute '$attr'"
> + fi
> +
> + if [ "$2" == "shutdown" ]; then
> + $XFS_IO_PROG -r $testfile -c "fsync" | _filter_xfs_io
> + _scratch_shutdown | tee -a $seqres.full
> + fi
> +
> + _scratch_cycle_mount
> +
> + after=`$LSATTR_PROG $testfile`
> + echo "Before copy up: $before" >> $seqres.full
> + echo "After copy up: $after" >> $seqres.full
> +
> + # Verify attributes were not lost during copy up, shutdown and mount cycle
> + if [ "$before" != "$after" ]; then
> + echo "Before copy up: $before"
> + echo "After copy up: $after"
> + fi
> +
> + echo "Test chattr -$1 $2" >> $seqres.full
> +
> + # Delete attribute from overlay file
> + $CHATTR_PROG -$attr $testfile
> +
> + before=`$LSATTR_PROG $testfile`
> +
> + if [ "$2" == "shutdown" ]; then
> + $XFS_IO_PROG -r $testfile -c "fsync" | _filter_xfs_io
> + _scratch_shutdown | tee -a $seqres.full
> + fi
> +
> + _scratch_cycle_mount
> +
> + after=`$LSATTR_PROG $testfile`
> + echo "Before mount cycle: $before" >> $seqres.full
> + echo "After mount cycle: $after" >> $seqres.full
> +
> + # Verify attribute deletion was not lost during shutdown or mount cycle
> + if [ "$before" != "$after" ]; then
> + echo "Before mount cycle: $before"
> + echo "After mount cycle: $after"
> + fi
> +}
> +
> +echo "Silence is golden"
> +
> +# This is the subset of attributes copied up by overlayfs since kernel
> +# commit ...
> +opts="A S a i"
> +for i in $opts; do
> + do_check $i
> + do_check $i shutdown
> +done
> +
> +status=0
> +exit
> diff --git a/tests/overlay/078.out b/tests/overlay/078.out
> new file mode 100644
> index 00000000..b8acea8c
> --- /dev/null
> +++ b/tests/overlay/078.out
> @@ -0,0 +1,2 @@
> +QA output created by 078
> +Silence is golden
> --
> 2.32.0
>
