On Tue, Oct 15, 2024 at 10:51:05AM +0800, Chao Yu wrote:
> This is a regression test to check whether f2fs handles dirty
> data correctly when checkpoint is disabled, if lfs mode is on,
> it will trigger OPU for all overwritten data, this will cost
> free segments, so f2fs must account overwritten data as OPU
> data when calculating free space, otherwise, it may run out
> of free segments in f2fs' allocation function, resulting in
> panic.
>
> Cc: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
> Signed-off-by: Chao Yu <chao@xxxxxxxxxx>
> ---
> tests/f2fs/006 | 52 ++++++++++++++++++++++++++++++++++++++++++++++
> tests/f2fs/006.out | 6 ++++++
> 2 files changed, 58 insertions(+)
> create mode 100755 tests/f2fs/006
> create mode 100644 tests/f2fs/006.out
>
> diff --git a/tests/f2fs/006 b/tests/f2fs/006
> new file mode 100755
> index 00000000..b359ef8f
> --- /dev/null
> +++ b/tests/f2fs/006
> @@ -0,0 +1,52 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2024 Oppo. All Rights Reserved.
> +#
> +# FS QA Test No. f2fs/006
> +#
> +# This is a regression test to check whether f2fs handles dirty
> +# data correctly when checkpoint is disabled, if lfs mode is on,
> +# it will trigger OPU for all overwritten data, this will cost
> +# free segments, so f2fs must account overwritten data as OPU
> +# data when calculating free space, otherwise, it may run out
> +# of free segments in f2fs' allocation function, resulting in
> +# panic.
> +#
> +. ./common/preamble
> +_begin_fstest auto quick
> +
> +_cleanup()
> +{
> + rm -f $img
> + _scratch_unmount >> $seqres.full
> + cd /
> + rm -r -f $tmp.*
> +}
> +
> +_require_scratch
> +_scratch_mkfs >> $seqres.full
> +_scratch_mount >> $seqres.full
> +
> +img=$SCRATCH_MNT/f2fs.img
> +mnt=$SCRATCH_MNT/f2fs.mnt
> +testfile=$mnt/testfile
> +
> +mkdir $mnt
> +dd if=/dev/zero of=$img bs=1M count=100 2>/dev/null
> +$MKFS_F2FS_PROG -f $img >/dev/null 2>&1
> +sync
> +
> +# use mode=lfs to let f2fs always triggers OPU
> +mount -t $FSTYP -o loop,mode=lfs,checkpoint=disable:10%,noinline_dentry $img $mnt
Hi Chao,
Is the loop device necessary? What if use SCRATCH_DEV and SCRATCH_MNT directly?
Thanks,
Zorro
> +
> +dd if=/dev/zero of=$testfile bs=1M count=50 2>/dev/null
> +
> +# it may run out of free space of f2fs and hang kernel
> +dd if=/dev/zero of=$testfile bs=1M count=50 conv=notrunc conv=fsync
> +dd if=/dev/zero of=$testfile bs=1M count=50 conv=notrunc conv=fsync
> +
> +mount -o remount,checkpoint=enable $mnt
> +umount $mnt
> +
> +status=0
> +exit
> diff --git a/tests/f2fs/006.out b/tests/f2fs/006.out
> new file mode 100644
> index 00000000..a2c7ba48
> --- /dev/null
> +++ b/tests/f2fs/006.out
> @@ -0,0 +1,6 @@
> +QA output created by 006
> +50+0 records in
> +50+0 records out
> +dd: error writing '/mnt/scratch_f2fs/f2fs.mnt/testfile': No space left on device
> +3+0 records in
> +2+0 records out
> --
> 2.40.1
>
