On Tue, May 6, 2025 at 12:05 AM Chao Yu via Linux-f2fs-devel
<linux-f2fs-devel@lists.sourceforge.net> wrote:
>
> This is a regression testcase to check whether we will handle database
> inode dirty status correctly:
> 1. mount f2fs image w/ timeout fault injection option
> 2. create a regular file, and write data into the file
> 3. start transaction on the file (via F2FS_IOC_START_ATOMIC_WRITE)
> 4. write transaction data to the file
> 5. commit and end the transaction (via F2FS_IOC_COMMIT_ATOMIC_WRITE)
> 6. meanwhile loop call fsync in parallel
> Before f098aeba04c9 ("f2fs: fix to avoid atomicity corruption of atomic
> file"), database file may become corrupted after atomic write while
> there is concurrent dirty inode flush in background.
>
> Cc: Jaegeuk Kim <jaeg...@kernel.org>
> Cc: Daeho Jeong <daehoje...@google.com>
> Signed-off-by: Chao Yu <c...@kernel.org>
> ---
> v2:
> - fix description of test steps
> - add missing "_require_kernel_config CONFIG_F2FS_FAULT_INJECTION"
> - add missing "_require_command "$F2FS_IO_PROG" f2fs_io"
> - put correct filesize in the golden output
> tests/f2fs/013 | 71 ++++++++++++++++++++++++++++++++++++++++++++++
> tests/f2fs/013.out | 2 ++
> 2 files changed, 73 insertions(+)
> create mode 100755 tests/f2fs/013
> create mode 100644 tests/f2fs/013.out
>
> diff --git a/tests/f2fs/013 b/tests/f2fs/013
> new file mode 100755
> index 00000000..4cf56840
> --- /dev/null
> +++ b/tests/f2fs/013
> @@ -0,0 +1,71 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2025 Chao Yu. All Rights Reserved.
> +#
> +# FS QA Test No. f2fs/013
> +#
> +# This is a regression testcase to check whether we will handle database
> +# inode dirty status correctly:
> +# 1. mount f2fs image w/ timeout fault injection option
> +# 2. create a regular file, and write data into the file
> +# 3. start transaction on the file (via F2FS_IOC_START_ATOMIC_WRITE)
> +# 4. write transaction data to the file
> +# 5. commit and end the transaction (via F2FS_IOC_COMMIT_ATOMIC_WRITE)
> +# 6. meanwhile loop call fsync in parallel
> +# Before f098aeba04c9 ("f2fs: fix to avoid atomicity corruption of atomic
> +# file"), database file may become corrupted after atomic write while
> +# there is concurrent dirty inode flush in background.
> +#
> +. ./common/preamble
> +_begin_fstest auto quick
> +_require_kernel_config CONFIG_F2FS_FAULT_INJECTION
> +_require_command "$F2FS_IO_PROG" f2fs_io
> +
> +_cleanup()
> +{
> + [ -n "$atomic_write_pid" ] && kill -9 $atomic_write_pid
> + wait
> + cd /
> + rm -r -f $tmp.*
> +}
> +
> +_fixed_by_kernel_commit f098aeba04c9 \
> + "f2fs: fix to avoid atomicity corruption of atomic file"
> +
> +_require_scratch
> +
> +_scratch_mkfs >> $seqres.full
> +# note that it relis on FAULT_TIMEOUT fault injection support in f2fs
relis -> relies
> +_scratch_mount "-o fault_injection=1,fault_type=4194304" >> $seqres.full
> +
> +dbfile=$SCRATCH_MNT/file.db
> +
> +# initialize database file
> +$XFS_IO_PROG -c "pwrite 0 4k" -c "fsync" -f $dbfile >> $seqres.full
> +
> +# sync filesystem to clear dirty inode
> +sync
> +
> +# start atomic_write on src.db database file and commit transaction
> +$F2FS_IO_PROG write 1 0 2 zero atomic_commit $dbfile >> $seqres.full &
I think we might have some timing issues here like background f2fs_io
ends earlier than foreground fsync() loop.
> +atomic_write_pid=$!
> +
> +# call fsync to flush dirty inode of database file in parallel
> +for ((j=0;j<1000;j++)) do
> + $F2FS_IO_PROG fsync $dbfile >> $seqres.full
> +done
> +
> +wait $atomic_write_pid
> +unset atomic_write_pid
> +
> +# flush dirty data and drop cache
> +sync
> +echo 3 > /proc/sys/vm/drop_caches
> +
> +stat $dbfile -c %s
> +
> +rm $dbfile
> +sync
> +
> +status=0
> +exit
> diff --git a/tests/f2fs/013.out b/tests/f2fs/013.out
> new file mode 100644
> index 00000000..d9271f75
> --- /dev/null
> +++ b/tests/f2fs/013.out
> @@ -0,0 +1,2 @@
> +QA output created by 013
> +8192
> --
> 2.49.0
>
>
>
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