On Tue, Sep 13, 2022 at 02:58:01PM +0200, Pavel Reichl wrote:
> This is a regression test for an incorrect computation of i_blocks for
> truncated files larger than 4 GiB. Bug was filed for exFAT.
>
> Test is based on reproducer provied by Christophe Vu-Brugier as part
> of kernel patch-fix submission.
>
> Signed-off-by: Pavel Reichl <preichl@xxxxxxxxxx>
> ---
This version looks good to me.
Reviewed-by: Zorro Lang <zlang@xxxxxxxxxx>
> tests/generic/698 | 48 +++++++++++++++++++++++++++++++++++++++++++
> tests/generic/698.out | 2 ++
> 2 files changed, 50 insertions(+)
> create mode 100755 tests/generic/698
> create mode 100644 tests/generic/698.out
>
> diff --git a/tests/generic/698 b/tests/generic/698
> new file mode 100755
> index 00000000..337df6c5
> --- /dev/null
> +++ b/tests/generic/698
> @@ -0,0 +1,48 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2022 Red Hat Inc. All Rights Reserved.
> +#
> +# FS QA Test 698
> +#
> +# Verify that i_blocks for truncated files larger than 4 GiB have correct
> +# values.
> +#
> +# This test verifies the problem fixed in kernel with commit
> +# 92fba084b79e exfat: fix i_blocks for files truncated over 4 GiB
> +#
> +. ./common/preamble
> +. ./common/filter
> +
> +_begin_fstest auto
> +
> +# Override the default cleanup function.
> +_cleanup()
> +{
> + cd /
> + rm -r -f $tmp.* $junk_dir
> +}
> +
> +_supported_fs generic
> +_fixed_by_kernel_commit 92fba084b79e \
> + "exfat: fix i_blocks for files truncated over 4 GiB"
> +
> +_require_test
> +_require_fs_space $TEST_DIR $((5 * 1024 * 1024)) #kB
> +
> +junk_dir=$TEST_DIR/$seq
> +junk_file=$junk_dir/junk
> +mkdir -p $junk_dir
> +
> +$XFS_IO_PROG -f -c "pwrite -W 0 5G" $junk_file > /dev/null
> +
> +truncate -s $((4 * 1024 * 1024 * 1024)) $junk_file
> +
> +block_size=`stat -c '%B' $junk_file`
> +iblocks_after_truncate=`stat -c '%b' $junk_file`
> +iblocks_expected=$((4 * 1024 * 1024 * 1024 / $block_size))
> +
> +_within_tolerance "Number of allocated blocks after truncate" $iblocks_after_truncate $iblocks_expected 1% -v
> +
> +status=0
> +
> +exit
> diff --git a/tests/generic/698.out b/tests/generic/698.out
> new file mode 100644
> index 00000000..cbb02d37
> --- /dev/null
> +++ b/tests/generic/698.out
> @@ -0,0 +1,2 @@
> +QA output created by 698
> +Number of allocated blocks after truncate is in range
> --
> 2.37.3
>
