Re: [PATCH 4/2] xfs: test running growfs on the realtime volume

[Chandan Babu R <chandanrlinux@gmail.com>]

On Saturday 10 October 2020 11:20:59 PM IST Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@oracle.com>
> 
> Make sure that we can run growfs to expand the realtime volume without
> it blowing up.  This is a regression test for the following patches:
> 
> xfs: Set xfs_buf type flag when growing summary/bitmap files
> xfs: Set xfs_buf's b_ops member when zeroing bitmap/summary files
> xfs: fix realtime bitmap/summary file truncation when growing rt volume
> xfs: make xfs_growfs_rt update secondary superblocks
> xfs: annotate grabbing the realtime bitmap/summary locks in growfs
> 
> Because the xfs maintainer realized that no, we have no tests for this
> particular piece of functionality.
>

The test looks good to me.

Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>

> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
> ---
>  tests/xfs/916     |   82 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  tests/xfs/916.out |   10 ++++++
>  tests/xfs/group   |    1 +
>  3 files changed, 93 insertions(+)
>  create mode 100755 tests/xfs/916
>  create mode 100644 tests/xfs/916.out
> 
> diff --git a/tests/xfs/916 b/tests/xfs/916
> new file mode 100755
> index 00000000..cde00314
> --- /dev/null
> +++ b/tests/xfs/916
> @@ -0,0 +1,82 @@
> +#! /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. 916
> +#
> +# Tests xfs_growfs on the realtime volume to make sure none of it blows up.
> +# This is a regression test for the following patches:
> +#
> +# xfs: Set xfs_buf type flag when growing summary/bitmap files
> +# xfs: Set xfs_buf's b_ops member when zeroing bitmap/summary files
> +# xfs: fix realtime bitmap/summary file truncation when growing rt volume
> +# xfs: make xfs_growfs_rt update secondary superblocks
> +# xfs: annotate grabbing the realtime bitmap/summary locks in growfs
> +#
> +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 /
> +	_scratch_unmount >> $seqres.full 2>&1
> +	test -e "$rtdev" && losetup -d $rtdev >> $seqres.full 2>&1
> +	rm -f $tmp.* $TEST_DIR/$seq.rtvol
> +}
> +
> +# get standard environment, filters and checks
> +. ./common/rc
> +. ./common/filter
> +
> +# real QA test starts here
> +_supported_fs xfs
> +# Note that we don't _require_realtime because we synthesize a rt volume
> +# below.
> +_require_scratch_nocheck
> +_require_no_large_scratch_dev
> +
> +echo "Create fake rt volume"
> +truncate -s 400m $TEST_DIR/$seq.rtvol
> +rtdev=$(_create_loop_device $TEST_DIR/$seq.rtvol)
> +
> +echo "Format and mount 100m rt volume"
> +export USE_EXTERNAL=yes
> +export SCRATCH_RTDEV=$rtdev
> +_scratch_mkfs -r size=100m > $seqres.full
> +_scratch_mount || _notrun "Could not mount scratch with synthetic rt volume"
> +
> +testdir=$SCRATCH_MNT/test-$seq
> +mkdir $testdir
> +
> +echo "Check rt volume stats"
> +$XFS_IO_PROG -c 'chattr +t' $testdir
> +$XFS_INFO_PROG $SCRATCH_MNT >> $seqres.full
> +before=$(stat -f -c '%b' $testdir)
> +
> +echo "Create some files"
> +_pwrite_byte 0x61 0 1m $testdir/original >> $seqres.full
> +
> +echo "Grow fs"
> +$XFS_GROWFS_PROG $SCRATCH_MNT 2>&1 |  _filter_growfs >> $seqres.full
> +_scratch_cycle_mount
> +
> +echo "Recheck 400m rt volume stats"
> +$XFS_INFO_PROG $SCRATCH_MNT >> $seqres.full
> +after=$(stat -f -c '%b' $testdir)
> +_within_tolerance "rt volume size" $after $((before * 4)) 5% -v
> +
> +echo "Create more copies to make sure the bitmap really works"
> +cp -p $testdir/original $testdir/copy3
> +
> +echo "Check filesystem"
> +_check_xfs_filesystem $SCRATCH_DEV none $rtdev
> +
> +# success, all done
> +status=0
> +exit
> diff --git a/tests/xfs/916.out b/tests/xfs/916.out
> new file mode 100644
> index 00000000..55f2356a
> --- /dev/null
> +++ b/tests/xfs/916.out
> @@ -0,0 +1,10 @@
> +QA output created by 916
> +Create fake rt volume
> +Format and mount 100m rt volume
> +Check rt volume stats
> +Create some files
> +Grow fs
> +Recheck 400m rt volume stats
> +rt volume size is in range
> +Create more copies to make sure the bitmap really works
> +Check filesystem
> diff --git a/tests/xfs/group b/tests/xfs/group
> index c75d2b99..74a29bc0 100644
> --- a/tests/xfs/group
> +++ b/tests/xfs/group
> @@ -528,3 +528,4 @@
>  910 auto quick inobtcount
>  911 auto quick bigtime
>  915 auto quick quota
> +916 auto quick realtime growfs
> 


-- 
chandan