Re: [PATCH v3 1/1] generic: add test for boundary in xfs_attr_shortform_verify

[Eryu Guan <guan@eryu.me>]

On Sat, Sep 12, 2020 at 12:19:53PM +0200, Pavel Reichl wrote:
> Add a regression test to check that the boundary test
> for the fixed-offset parts of xfs_attr_sf_entry
> in xfs_attr_shortform_verify is not off by one.
> 
> This can be shown by:
> 
> touch file
> setfattr -n user.a file
> 
> With help from Zorro. Thanks very much.
> 
> Signed-off-by: Pavel Reichl <preichl@redhat.com>
> ---
>  tests/generic/609     | 63 +++++++++++++++++++++++++++++++++++++++++++
>  tests/generic/609.out |  4 +++
>  tests/generic/group   |  1 +
>  3 files changed, 68 insertions(+)
>  create mode 100755 tests/generic/609
>  create mode 100644 tests/generic/609.out
> 
> diff --git a/tests/generic/609 b/tests/generic/609
> new file mode 100755
> index 00000000..f048b2ba
> --- /dev/null
> +++ b/tests/generic/609
> @@ -0,0 +1,63 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2020 Red Hat, Inc. All Rights Reserved.
> +#
> +# FS QA Test 609
> +#
> +# Verify that metadata won't get corrupted when extended attribute
> +# name of size one is set.
> +#
> +# This test verifies the problem fixed in kernel with commit
> +# f4020438fab0 ("xfs: fix boundary test in xfs_attr_shortform_verify")
> +
> +seq=`basename $0`
> +seqres=$RESULT_DIR/$seq
> +echo "QA output created by $seq"
> +
> +here=`pwd`
> +tmp=/tmp/$$
> +status=1	# failure is the default!
> +trap "_cleanup; exit \$status" 0 1 2 3 15
> +
> +_cleanup()
> +{
> +	cd /
> +	rm -f $tmp.*
> +}
> +
> +# get standard environment, filters and checks
> +. ./common/rc
> +. ./common/filter
> +. ./common/attr
> +
> +# remove previous $seqres.full before test
> +rm -f $seqres.full
> +
> +# real QA test starts here
> +
> +_supported_fs generic
> +_supported_os Linux
> +_require_scratch
> +_require_attrs
> +
> +_scratch_mkfs > $seqres.full 2>&1
> +_scratch_mount
> +
> +localfile="${SCRATCH_MNT}/testfile"
> +
> +touch "${localfile}"
> +"${SETFATTR_PROG}" -n user.a "${localfile}"
> +
> +# Make sure that changes are written to disk
> +echo 3 > /proc/sys/vm/drop_caches
> +sleep 3

If _scratch_cycle_mount also works, I'd prefer it over a system-wide
drop cache.

And is "sleep 3" really needed?

> +
> +# If the target bug isn't fixed, getfattr fails
> +${GETFATTR_PROG} --absolute-names -n user.a $localfile | _filter_scratch
> +
> +# Make sure the filesystem isn't corrupted manually
> +_scratch_unmount
> +_check_scratch_fs

The test harness will do fsck by default after test, so there's no need
to _check_scratch_fs manually.

Thanks,
Eryu

> +
> +status=0
> +exit
> diff --git a/tests/generic/609.out b/tests/generic/609.out
> new file mode 100644
> index 00000000..d4ae152d
> --- /dev/null
> +++ b/tests/generic/609.out
> @@ -0,0 +1,4 @@
> +QA output created by 609
> +# file: SCRATCH_MNT/testfile
> +user.a=""
> +
> diff --git a/tests/generic/group b/tests/generic/group
> index aa969bcb..6fa83c13 100644
> --- a/tests/generic/group
> +++ b/tests/generic/group
> @@ -611,3 +611,4 @@
>  606 auto attr quick dax
>  607 auto attr quick dax
>  608 auto attr quick dax
> +609 auto attr quick
> -- 
> 2.26.2