Re: [PATCH 2/2] xfs: test inobtcount upgrade

[Amir Goldstein <amir73il@gmail.com>]

On Wed, Apr 21, 2021 at 3:23 AM Darrick J. Wong <djwong@kernel.org> wrote:
>
> From: Darrick J. Wong <djwong@kernel.org>
>
> Make sure we can actually upgrade filesystems to support inode btree
> counters.
>
> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
> ---
>  common/xfs        |    8 +++-
>  tests/xfs/910     |   98 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  tests/xfs/910.out |   23 ++++++++++++
>  tests/xfs/group   |    1 +
>  4 files changed, 127 insertions(+), 3 deletions(-)
>  create mode 100755 tests/xfs/910
>  create mode 100644 tests/xfs/910.out
>
>
> diff --git a/common/xfs b/common/xfs
> index 5abc7034..3d660858 100644
> --- a/common/xfs
> +++ b/common/xfs
> @@ -1153,13 +1153,15 @@ _require_xfs_repair_upgrade()
>                 _notrun "xfs_repair does not support upgrading fs with $type"
>  }
>
> -_require_xfs_scratch_inobtcount()
> +# Require that the scratch device exists, that mkfs can format with inobtcount
> +# enabled, and that the kernel can mount such a filesystem.
> +_require_scratch_xfs_inobtcount()
>  {
>         _require_scratch
>
>         _scratch_mkfs -m inobtcount=1 &> /dev/null || \
> -               _notrun "mkfs.xfs doesn't have inobtcount feature"
> +               _notrun "mkfs.xfs doesn't support inobtcount feature"
>         _try_scratch_mount || \
> -               _notrun "inobtcount not supported by scratch filesystem type: $FSTYP"
> +               _notrun "kernel doesn't support xfs inobtcount feature"
>         _scratch_unmount
>  }
> diff --git a/tests/xfs/910 b/tests/xfs/910
> new file mode 100755
> index 00000000..237d0a35
> --- /dev/null
> +++ b/tests/xfs/910
> @@ -0,0 +1,98 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0-or-later
> +# Copyright (c) 2021 Oracle.  All Rights Reserved.
> +#
> +# FS QA Test No. 910
> +#
> +# Check that we can upgrade a filesystem to support inobtcount and that
> +# everything works 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 $tmp.*
> +}
> +
> +# get standard environment, filters and checks
> +. ./common/rc
> +. ./common/filter
> +
> +# real QA test starts here
> +_supported_fs xfs
> +_require_scratch_xfs_inobtcount
> +_require_command "$XFS_ADMIN_PROG" "xfs_admin"
> +_require_xfs_repair_upgrade inobtcount
> +
> +rm -f $seqres.full
> +
> +# Make sure we can't format a filesystem with inobtcount and not finobt.
> +_scratch_mkfs -m crc=1,inobtcount=1,finobt=0 &> $seqres.full && \
> +       echo "Should not be able to format with inobtcount but not finobt."
> +
> +# Make sure we can't upgrade a V4 filesystem
> +_scratch_mkfs -m crc=0,inobtcount=0,finobt=0 >> $seqres.full
> +_scratch_xfs_admin -O inobtcount=1 2>> $seqres.full
> +_check_scratch_xfs_features INOBTCNT
> +
> +# Make sure we can't upgrade a filesystem to inobtcount without finobt.
> +_scratch_mkfs -m crc=1,inobtcount=0,finobt=0 >> $seqres.full
> +_scratch_xfs_admin -O inobtcount=1 2>> $seqres.full
> +_check_scratch_xfs_features INOBTCNT
> +
> +# Format V5 filesystem without inode btree counter support and populate it.
> +_scratch_mkfs -m crc=1,inobtcount=0 >> $seqres.full
> +_scratch_mount
> +
> +mkdir $SCRATCH_MNT/stress
> +$FSSTRESS_PROG -d $SCRATCH_MNT/stress -n 1000 >> $seqres.full
> +echo moo > $SCRATCH_MNT/urk
> +
> +_scratch_unmount
> +
> +# Upgrade filesystem to have the counters and inject failure into repair and
> +# make sure that the only path forward is to re-run repair on the filesystem.
> +echo "Fail partway through upgrading"
> +XFS_REPAIR_FAIL_AFTER_PHASE=2 _scratch_xfs_repair -c inobtcount=1 2>> $seqres.full
> +test $? -eq 137 || echo "repair should have been killed??"
> +_check_scratch_xfs_features NEEDSREPAIR INOBTCNT
> +_try_scratch_mount &> $tmp.mount
> +res=$?
> +_filter_scratch < $tmp.mount
> +if [ $res -eq 0 ]; then
> +       echo "needsrepair should have prevented mount"
> +       _scratch_unmount
> +fi
> +
> +echo "Re-run repair to finish upgrade"
> +_scratch_xfs_repair 2>> $seqres.full
> +_check_scratch_xfs_features NEEDSREPAIR INOBTCNT
> +
> +echo "Filesystem should be usable again"
> +_scratch_mount
> +$FSSTRESS_PROG -d $SCRATCH_MNT/stress -n 1000 >> $seqres.full
> +_scratch_unmount
> +_check_scratch_fs
> +_check_scratch_xfs_features INOBTCNT
> +
> +echo "Make sure we have nonzero counters"
> +_scratch_xfs_db -c 'agi 0' -c 'print ino_blocks fino_blocks' | \
> +       sed -e 's/= [1-9]*/= NONZERO/g'
> +

I don't think = 100 translates to = NONZERO...

> +echo "Make sure we can't re-add inobtcount"
> +_scratch_xfs_admin -O inobtcount=1 2>> $seqres.full
> +
> +echo "Mount again, look at our files"
> +_scratch_mount >> $seqres.full
> +cat $SCRATCH_MNT/urk
> +
> +status=0
> +exit
> diff --git a/tests/xfs/910.out b/tests/xfs/910.out
> new file mode 100644
> index 00000000..1bf040d5
> --- /dev/null
> +++ b/tests/xfs/910.out
> @@ -0,0 +1,23 @@
> +QA output created by 910
> +Running xfs_repair to upgrade filesystem.
> +Inode btree count feature only supported on V5 filesystems.
> +FEATURES: INOBTCNT:NO
> +Running xfs_repair to upgrade filesystem.
> +Inode btree count feature requires free inode btree.
> +FEATURES: INOBTCNT:NO
> +Fail partway through upgrading
> +Adding inode btree counts to filesystem.
> +FEATURES: NEEDSREPAIR:YES INOBTCNT:YES
> +mount: SCRATCH_MNT: mount(2) system call failed: Structure needs cleaning.
> +Re-run repair to finish upgrade
> +FEATURES: NEEDSREPAIR:NO INOBTCNT:YES
> +Filesystem should be usable again
> +FEATURES: INOBTCNT:YES
> +Make sure we have nonzero counters
> +ino_blocks = NONZERO
> +fino_blocks = NONZERO
> +Make sure we can't re-add inobtcount
> +Running xfs_repair to upgrade filesystem.
> +Filesystem already has inode btree counts.
> +Mount again, look at our files
> +moo

This test is quite rigid in the format of messages expected from
xfs_repair. I suppose there is no precedent here...

> diff --git a/tests/xfs/group b/tests/xfs/group
> index a2309465..bd47333c 100644
> --- a/tests/xfs/group
> +++ b/tests/xfs/group
> @@ -526,3 +526,4 @@
>  768 auto quick repair
>  770 auto repair
>  773 auto quick repair
> +910 auto quick inobtcount
>
+repair?

Thanks,
Amir.