Re: [PATCH] xfs: Regression test for invalid sb_logsunit

["Darrick J. Wong" <darrick.wong@oracle.com>]

On Thu, Jan 11, 2018 at 04:25:08PM +0800, xiao yang wrote:
> If log stripe unit isn't a multiple of the fs blocksize and mounting,
> the invalid sb_logsunit leads to crash as soon as we try to write to
> the log.
> 
> Signed-off-by: xiao yang <yangx.jy@cn.fujitsu.com>
> ---
>  tests/xfs/437     | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  tests/xfs/437.out |  2 ++
>  tests/xfs/group   |  1 +
>  3 files changed, 76 insertions(+)
>  create mode 100755 tests/xfs/437
>  create mode 100644 tests/xfs/437.out
> 
> diff --git a/tests/xfs/437 b/tests/xfs/437
> new file mode 100755
> index 0000000..96cec25
> --- /dev/null
> +++ b/tests/xfs/437
> @@ -0,0 +1,73 @@
> +#! /bin/bash
> +# FS QA Test No. 437
> +#
> +# Regression test for commit:
> +# 9c92ee2 ("xfs: validate sb_logsunit is a multiple of the fs blocksize")
> +#
> +# If log stripe unit isn't a multiple of the fs blocksize and mounting,
> +# the invalid sb_logsunit leads to crash as soon as we try to write to
> +# the log.
> +#
> +#-----------------------------------------------------------------------
> +# Copyright (c) 2018 FUJITSU.  All Rights Reserved.
> +# Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
> +#
> +# This program is free software; you can redistribute it and/or
> +# modify it under the terms of the GNU General Public License as
> +# published by the Free Software Foundation.
> +#
> +# This program is distributed in the hope that it would be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> +# GNU General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with this program; if not, write the Free Software Foundation,
> +# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
> +#-----------------------------------------------------------------------
> +
> +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()
> +{
> +	rm -rf $tmp.*
> +}
> +
> +# get standard environment and checks
> +. ./common/rc
> +
> +# real QA test starts here
> +_supported_os Linux
> +_supported_fs xfs
> +_require_scratch
> +
> +rm -f "$seqres.full"
> +
> +# Format
> +_scratch_mkfs > $seqres.full 2>&1 || _fail "mkfs failed"
> +
> +# Set logsunit to a value which is not a multiple of the fs blocksize
> +blksz=$(_scratch_xfs_db -x -c "sb 0" -c "p blocksize")

_scratch_xfs_get_metadata_field ?

(Or, _scratch_xfs_get_sb_field if Hou Tao's dquot unmount tests go in)

> +_scratch_xfs_db -x -c "sb 0" -c "write logsunit $((blksz - 1))" \
> +	>> $seqres.full 2>&1 || _notrun "Failed to set sb_logsunit"

_scratch_xfs_set_metadata_field ?

Otherwise this looks decent.

--D

> +
> +# Mount and writing log may trigger a crash
> +if _scratch_mount >> $seqres.full 2>&1; then
> +	for i in $(seq 1 1000); do
> +		touch ${SCRATCH_MNT}/$i
> +	done
> +	_scratch_unmount
> +fi
> +
> +echo "Silence is golden"
> +
> +# success, all done
> +status=0
> +exit
> diff --git a/tests/xfs/437.out b/tests/xfs/437.out
> new file mode 100644
> index 0000000..4dcb607
> --- /dev/null
> +++ b/tests/xfs/437.out
> @@ -0,0 +1,2 @@
> +QA output created by 437
> +Silence is golden
> diff --git a/tests/xfs/group b/tests/xfs/group
> index d230060..35d1b03 100644
> --- a/tests/xfs/group
> +++ b/tests/xfs/group
> @@ -434,3 +434,4 @@
>  434 auto quick clone fsr
>  435 auto quick clone
>  436 auto quick clone fsr
> +437 auto quick log dangerous
> -- 
> 1.8.3.1
> 
> 
>