Re: [PATCH 4/4] xfs: test upgrading filesystem to bigtime

[Amir Goldstein <amir73il@gmail.com>]

On Tue, Aug 18, 2020 at 2:23 AM Darrick J. Wong <darrick.wong@oracle.com> wrote:
>
> From: Darrick J. Wong <darrick.wong@oracle.com>
>
> Test that we can upgrade an existing filesystem to use bigtime.
>
> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
> ---
>  common/xfs        |   16 +++++++++++
>  tests/xfs/908     |   74 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  tests/xfs/908.out |    3 ++
>  tests/xfs/909     |   77 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  tests/xfs/909.out |   12 ++++++++
>  tests/xfs/group   |    2 +
>  6 files changed, 184 insertions(+)
>  create mode 100755 tests/xfs/908
>  create mode 100644 tests/xfs/908.out
>  create mode 100755 tests/xfs/909
>  create mode 100644 tests/xfs/909.out
>
>
> diff --git a/common/xfs b/common/xfs
> index 252a5c0d..c0735a51 100644
> --- a/common/xfs
> +++ b/common/xfs
> @@ -985,3 +985,19 @@ _xfs_timestamp_range()
>                 $dbprog -f -c 'timelimit --compact' | awk '{printf("%s %s", $1, $2);}'
>         fi
>  }
> +
> +_require_xfs_mkfs_bigtime()
> +{
> +       _scratch_mkfs_xfs_supported -m bigtime=1 >/dev/null 2>&1 \
> +          || _notrun "mkfs.xfs doesn't have bigtime feature"
> +}
> +
> +_require_xfs_scratch_bigtime()
> +{
> +       _require_scratch
> +
> +       _scratch_mkfs -m bigtime=1 > /dev/null
> +       _try_scratch_mount || \
> +               _notrun "bigtime not supported by scratch filesystem type: $FSTYP"
> +       _scratch_unmount
> +}
> diff --git a/tests/xfs/908 b/tests/xfs/908
> new file mode 100755
> index 00000000..e313e14b
> --- /dev/null
> +++ b/tests/xfs/908
> @@ -0,0 +1,74 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0-or-later
> +# Copyright (c) 2020, Oracle and/or its affiliates.  All Rights Reserved.
> +#
> +# FS QA Test No. 908
> +#
> +# Check that we can upgrade a filesystem to support bigtime and that inode
> +# timestamps work properly after the upgrade.
> +
> +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
> +
> +# real QA test starts here
> +_supported_fs xfs
> +_supported_os Linux
> +_require_xfs_mkfs_crc
> +_require_xfs_mkfs_bigtime
> +_require_xfs_scratch_bigtime
> +
> +date --date='Jan 1 00:00:00 UTC 2040' > /dev/null 2>&1 || \
> +       _notrun "Userspace does not support dates past 2038."
> +
> +rm -f $seqres.full
> +
> +# Format V5 filesystem without bigtime support and populate it
> +_scratch_mkfs -m crc=1,bigtime=0 > $seqres.full
> +_scratch_xfs_db -c 'version' -c 'sb 0' -c 'p' >> $seqres.full
> +_scratch_mount >> $seqres.full
> +
> +touch $SCRATCH_MNT/a
> +touch $SCRATCH_MNT/b
> +ls -la $SCRATCH_MNT/* >> $seqres.full
> +
> +_scratch_unmount
> +_check_scratch_fs
> +
> +# Now upgrade to bigtime support
> +_scratch_xfs_admin -O bigtime >> $seqres.full
> +_check_scratch_fs
> +_scratch_xfs_db -c 'version' -c 'sb 0' -c 'p' >> $seqres.full
> +
> +# Mount again, look at our files
> +_scratch_mount >> $seqres.full
> +ls -la $SCRATCH_MNT/* >> $seqres.full
> +
> +# Modify some timestamps
> +touch -d 'Feb 22 22:22:22 UTC 2222' $SCRATCH_MNT/b
> +
> +_scratch_cycle_mount
> +
> +# Did the timestamp survive?
> +ls -la $SCRATCH_MNT/* >> $seqres.full
> +TZ=UTC stat -c '%Y' $SCRATCH_MNT/b
> +

Darrick,

These tests look great, but I wonder.
generic/402 has more test coverage than above.
It tests several data points and it tests them with and without mount cycle.

With your current tests, bigtime will enjoy this test coverage only if
the entire
run is configured with custom XFS_MKFS_OPTIONS or when bigtime
becomes default for mkfs.

Do you think we should have a temporary clone of generic/402 for xfs which
enables bigtime for the time being?

Thanks,
Amir.