Re: [PATCH 2/3] xfs: test that RT growfs not aligned to zone size fails

["Darrick J. Wong" <djwong@kernel.org>]

On Mon, Dec 15, 2025 at 10:50:28AM +0100, Christoph Hellwig wrote:
> Check that a file system with a zoned RT subvolume can't be resized to
> a size not aligned to the zone size.
> 
> Uses a zloop device so that we can control the exact zone size.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>

It seems to me that this test is creating a 10G zoned volume with a zone
size of 256M, and then growfs'ing to (12G + 52K) which is supposed to
fail, correct?

If so, then
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>

--D

> ---
>  tests/xfs/652     | 58 +++++++++++++++++++++++++++++++++++++++++++++++
>  tests/xfs/652.out |  4 ++++
>  2 files changed, 62 insertions(+)
>  create mode 100755 tests/xfs/652
>  create mode 100644 tests/xfs/652.out
> 
> diff --git a/tests/xfs/652 b/tests/xfs/652
> new file mode 100755
> index 000000000000..91399be28df0
> --- /dev/null
> +++ b/tests/xfs/652
> @@ -0,0 +1,58 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0-or-later
> +# Copyright (c) 2025 Christoph Hellwig.
> +#
> +# FS QA Test No. 652
> +#
> +# Tests that xfs_growfs to a realtime volume size that is not zone aligned is
> +# rejected.
> +#
> +. ./common/preamble
> +_begin_fstest auto quick realtime growfs zone
> +
> +. ./common/filter
> +. ./common/zoned
> +
> +_require_realtime
> +_require_zloop
> +_require_scratch
> +_require_scratch_size $((16 * 1024 * 1024)) # 16GiB in kiB units
> +
> +_cleanup()
> +{
> +	if [ -n "$mnt" ]; then
> +		_unmount $mnt 2>/dev/null
> +	fi
> +	_destroy_zloop $zloop
> +	cd /
> +	rm -r -f $tmp.*
> +}
> +
> +_scratch_mkfs > /dev/null 2>&1
> +_scratch_mount
> +
> +fsbsize=4096
> +unaligned_size=$((((12 * 1024 * 1024 * 1024) + (fsbsize * 13)) / fsbsize))
> +
> +mnt="$SCRATCH_MNT/mnt"
> +zloopdir="$SCRATCH_MNT/zloop"
> +
> +mkdir -p $mnt
> +zloop=$(_create_zloop $zloopdir 256 2)
> +
> +echo "Format and mount zloop file system"
> +_try_mkfs_dev -b size=4k -r size=10g $zloop >> $seqres.full 2>&1 ||\
> +	_notrun "cannot mkfs zoned filesystem"
> +_mount $zloop $mnt
> +
> +echo "Try to grow file system to a not zone aligned size"
> +$XFS_GROWFS_PROG -R $unaligned_size $mnt >> $seqres.full 2>&1 && \
> +	_fail "growfs to unaligned size succeeded"
> +
> +echo "Remount file system"
> +umount $mnt
> +_mount $zloop $mnt
> +
> +# success, all done
> +status=0
> +exit
> diff --git a/tests/xfs/652.out b/tests/xfs/652.out
> new file mode 100644
> index 000000000000..8de9ab41d47f
> --- /dev/null
> +++ b/tests/xfs/652.out
> @@ -0,0 +1,4 @@
> +QA output created by 652
> +Format and mount zloop file system
> +Try to grow file system to a not zone aligned size
> +Remount file system
> -- 
> 2.47.3
> 
>