Re: [PATCH v5 08/12] generic: Stress fsx with atomic writes enabled

[John Garry <john.g.garry@oracle.com>]

On 22/08/2025 09:02, Ojaswin Mujoo wrote:
> Stress file with atomic writes to ensure we excercise codepaths

exercise

> where we are mixing different FS operations with atomic writes
> 
> Suggested-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
> Reviewed-by: Darrick J. Wong <djwong@kernel.org>
> Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>

Reviewed-by: John Garry <john.g.garry@oracle.com>

> ---
>   tests/generic/1229     | 68 ++++++++++++++++++++++++++++++++++++++++++
>   tests/generic/1229.out |  2 ++
>   2 files changed, 70 insertions(+)
>   create mode 100755 tests/generic/1229
>   create mode 100644 tests/generic/1229.out
> 
> diff --git a/tests/generic/1229 b/tests/generic/1229
> new file mode 100755
> index 00000000..7fa57105
> --- /dev/null
> +++ b/tests/generic/1229
> @@ -0,0 +1,68 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2025 IBM Corporation. All Rights Reserved.
> +#
> +# FS QA Test 1229
> +#
> +# fuzz fsx with atomic writes
> +#
> +. ./common/preamble
> +. ./common/atomicwrites
> +_begin_fstest rw auto quick atomicwrites
> +
> +_require_odirect
> +_require_scratch_write_atomic
> +
> +_scratch_mkfs >> $seqres.full 2>&1
> +_scratch_mount  >> $seqres.full 2>&1
> +
> +testfile=$SCRATCH_MNT/testfile
> +touch $testfile
> +
> +awu_max=$(_get_atomic_write_unit_max $testfile)
> +blksz=$(_get_block_size $SCRATCH_MNT)
> +bsize=`$here/src/min_dio_alignment $SCRATCH_MNT $SCRATCH_DEV`
> +
> +set_fsx_avoid() {
> +	local file=$1
> +
> +	case "$FSTYP" in
> +	"ext4")
> +		local dev=$(findmnt -n -o SOURCE --target $testfile)
> +
> +		# fsx insert/collpase range support for ext4+bigalloc is
> +		# currently broken, so disable it. Also disable incase we can't

in case

> +		# detect bigalloc to be on safer side.
> +		if [ -z "$DUMPE2FS_PROG" ]; then
> +			echo "dumpe2fs not found, disabling insert/collapse range" >> $seqres.full
> +			FSX_AVOID+=" -I -C"
> +			return
> +		fi
> +
> +		$DUMPE2FS_PROG -h $dev 2>&1 | grep -q bigalloc && {
> +			echo "fsx insert/collapse range not supported with bigalloc. Disabling.." >> $seqres.full
> +			FSX_AVOID+=" -I -C"
> +		}
> +		;;
> +	*)
> +		;;
> +	esac
> +}
> +
> +# fsx usage:
> +#
> +# -N numops: total # operations to do
> +# -l flen: the upper bound on file size
> +# -o oplen: the upper bound on operation size (64k default)
> +# -Z: O_DIRECT ()
> +
> +set_fsx_avoid
> +_run_fsx_on_file $testfile -N 10000 -o $awu_max -A -l 500000 -r $bsize -w $bsize -Z $FSX_AVOID  >> $seqres.full
> +if [[ "$?" != "0" ]]
> +then
> +	_fail "fsx returned error: $?"
> +fi
> +
> +echo "Silence is golden"
> +status=0
> +exit
> diff --git a/tests/generic/1229.out b/tests/generic/1229.out
> new file mode 100644
> index 00000000..737d61c6
> --- /dev/null
> +++ b/tests/generic/1229.out
> @@ -0,0 +1,2 @@
> +QA output created by 1229
> +Silence is golden