linux-ext4 - Re: [PATCHv2 2/2] generic: Add integrity tests with synchronous directio

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Message-ID: <20230928034204.htefxfkdobn3d5e4@dell-per750-06-vm-08.rhts.eng.pek2.redhat.com>
Date:   Thu, 28 Sep 2023 11:42:04 +0800
From:   Zorro Lang <zlang@...hat.com>
To:     "Ritesh Harjani (IBM)" <ritesh.list@...il.com>
Cc:     fstests@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: Re: [PATCHv2 2/2] generic: Add integrity tests with synchronous
 directio

On Sat, Sep 23, 2023 at 05:30:24PM +0530, Ritesh Harjani (IBM) wrote:
> This test covers data & metadata integrity check with directio with
> o_sync flag and checks the file contents & size after sudden fileystem
> shutdown once the directio write is completed. ext4 directio after iomap
> conversion was broken in the sense that if the FS crashes after
> synchronous directio write, it's file size is not properly updated.
> This test adds a testcase to cover such scenario.
> 
> Man page of open says that -
> O_SYNC provides synchronized I/O file integrity completion, meaning write
> operations will flush data and all associated metadata to the underlying
> hardware



> 
> Reported-by: Gao Xiang <hsiangkao@...ux.alibaba.com>
> Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@...il.com>
> ---
>  tests/generic/471     | 50 +++++++++++++++++++++++++++++++++++++++++++
>  tests/generic/471.out | 22 +++++++++++++++++++
>  2 files changed, 72 insertions(+)
>  create mode 100755 tests/generic/471
>  create mode 100644 tests/generic/471.out
> 
> diff --git a/tests/generic/471 b/tests/generic/471

The generic/471 has been taken last week, you can choose another number.
Or simply use generic/999, then I'll change the 999 to a proper number.

> new file mode 100755
> index 00000000..218e6676
> --- /dev/null
> +++ b/tests/generic/471
> @@ -0,0 +1,50 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2023 IBM Corporation.  All Rights Reserved.
> +#
> +# FS QA Test 471
> +#
> +# Integrity test for O_SYNC with buff-io, dio, aio-dio with sudden shutdown
> +#
> +. ./common/preamble
> +_begin_fstest auto quick shutdown aio
> +
> +# real QA test starts here
> +_supported_fs generic

Is the bug fix be reviewed and acked now? If it is, please use _fixed_by_kernel_commit
at here. The commit id can be "xxxxxxxxxxxx" if it's not merged by acked.

> +_require_scratch
> +_require_scratch_shutdown
> +_require_odirect

Due to you add aio test in v2, so this line should be: _require_aiodio

> +_require_aiodio aio-dio-write-verify
> +
> +_scratch_mkfs > $seqres.full 2>&1
> +_scratch_mount
> +
> +echo "T-1: Create a 1M file using buff-io & O_SYNC"
> +$XFS_IO_PROG -fs -c "pwrite -S 0x5a 0 1M" $SCRATCH_MNT/testfile.t1 > /dev/null 2>&1
> +echo "T-1: Shutdown the fs suddenly"
> +_scratch_shutdown
> +echo "T-1: Cycle mount"
> +_scratch_cycle_mount
> +echo "T-1: File contents after cycle mount"
> +_hexdump $SCRATCH_MNT/testfile.t1
> +
> +echo "T-2: Create a 1M file using O_DIRECT & O_SYNC"
> +$XFS_IO_PROG -fsd -c "pwrite -S 0x5a 0 1M" $SCRATCH_MNT/testfile.t2 > /dev/null 2>&1
> +echo "T-2: Shutdown the fs suddenly"
> +_scratch_shutdown
> +echo "T-2: Cycle mount"
> +_scratch_cycle_mount
> +echo "T-2: File contents after cycle mount"
> +_hexdump $SCRATCH_MNT/testfile.t2
> +
> +echo "T-3: Create a 1M file using AIO-DIO & O_SYNC"
> +$AIO_TEST -a size=1048576 -S -N $SCRATCH_MNT/testfile.t3 > /dev/null 2>&1

So you just need aio-dio-write-verify.c to do aio write. Maybe we can have aio
read and write support in xfs_io in one day:)

Thanks,
Zorro


> +echo "T-3: Shutdown the fs suddenly"
> +_scratch_shutdown
> +echo "T-3: Cycle mount"
> +_scratch_cycle_mount
> +echo "T-3: File contents after cycle mount"
> +_hexdump $SCRATCH_MNT/testfile.t3
> +
> +status=0
> +exit
> diff --git a/tests/generic/471.out b/tests/generic/471.out
> new file mode 100644
> index 00000000..2bfb033d
> --- /dev/null
> +++ b/tests/generic/471.out
> @@ -0,0 +1,22 @@
> +QA output created by 471
> +T-1: Create a 1M file using buff-io & O_SYNC
> +T-1: Shutdown the fs suddenly
> +T-1: Cycle mount
> +T-1: File contents after cycle mount
> +000000 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  >ZZZZZZZZZZZZZZZZ<
> +*
> +100000
> +T-2: Create a 1M file using O_DIRECT & O_SYNC
> +T-2: Shutdown the fs suddenly
> +T-2: Cycle mount
> +T-2: File contents after cycle mount
> +000000 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  >ZZZZZZZZZZZZZZZZ<
> +*
> +100000
> +T-3: Create a 1M file using AIO-DIO & O_SYNC
> +T-3: Shutdown the fs suddenly
> +T-3: Cycle mount
> +T-3: File contents after cycle mount
> +000000 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  >ZZZZZZZZZZZZZZZZ<
> +*
> +100000
> -- 
> 2.41.0
>