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Re: [7/8] xfstests: add a new test that runs fsstress under ENOSPC condi

To: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
Subject: Re: [7/8] xfstests: add a new test that runs fsstress under ENOSPC conditions
From: Phil White <pwhite@xxxxxxx>
Date: Fri, 2 Dec 2011 15:28:57 -0800
Cc: xfs@xxxxxxxxxxx
User-agent: Mutt/1.5.21 (2010-09-15)
On Sat, Oct 29, 2011 at 12:48:16AM -0000, Dmitry Monakhov wrote:
> During stress testing we want to cover as much code paths as possible
> fsstress is very good for this purpose. But it has expandable nature
> (disk usage almost continually grow). So once it goes in no ENOSPC
> condition it will be where till the end. But by running 'dd' writers
> in parallel we can regularly trigger ENOSPC but only for a limited
> periods of time because each time it opens the same file with O_TRUNC.
> 
> Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
> 
> ---
> 264     |   86 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  264.out |    5 +++
>  group   |    1 +
>  3 files changed, 92 insertions(+), 0 deletions(-)
>  create mode 100755 264
>  create mode 100644 264.out
> 
> diff --git a/264 b/264
> new file mode 100755
> index 0000000..fc6df23
> --- /dev/null
> +++ b/264
> @@ -0,0 +1,86 @@
> +#! /bin/bash
> +# FSQA Test No. 264
> +#
> +# Run fsstress and ENSPC hitters in parallel, check fs consistency an the end
> +#
> +#-----------------------------------------------------------------------
> +# Copyright (c) 2006 Silicon Graphics, Inc.  All Rights Reserved.
> +#
> +# 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
> +#
> +#-----------------------------------------------------------------------
> +#
> +# creator
> +owner=dmonakhov@xxxxxxxxxx
> +
> +seq=`basename $0`
> +echo "QA output created by $seq"
> +
> +here=`pwd`
> +tmp=/tmp/$$
> +status=1     # failure is the default!
> +trap "rm -f $tmp.*; exit \$status" 0 1 2 3 15
> +
> +# get standard environment, filters and checks
> +. ./common.rc
> +. ./common.filter
> +# Disable all sync operations to get higher load
> +FSSTRESS_AVOID="$FSSTRESS_AVOID -ffsync=0 -fsync=0 -ffdatasync=0"
> +_workout()
> +{
> +     echo ""
> +     echo "Run fsstress"
> +     echo ""
> +     num_iterations=10
> +     enospc_time=2
> +     out=$SCRATCH_MNT/fsstress.$$
> +     args="-p128 -n999999999 -f setattr=1 $FSSTRESS_AVOID -d $out"
> +     echo "fsstress $args" >> $here/$seq.full
> +     $FSSTRESS_PROG $args > /dev/null 2>&1 &
> +     pid=$!
> +     echo "Run dd writers in parallel"
> +     for ((i=0; i < num_iterations; i++))
> +     do
> +             # File will be opened with O_TRUNC each time
> +             dd if=/dev/zero of=$SCRATCH_MNT/SPACE_CONSUMER bs=1M count=1 \
> +                     > /dev/null 2>&1
> +             sleep $enospc_time
> +     done
> +     kill $pid
> +     wait $pid
> +}
> +
> +# real QA test starts here
> +_supported_fs generic
> +_supported_os Linux
> +_require_scratch
> +_need_to_be_root
> +
> +umount $SCRATCH_DEV 2>/dev/null
> +_scratch_mkfs_sized $((512 * 1024 * 1024)) >> $seq.full 2>&1
> +_scratch_mount
> +
> +if ! _workout; then
> +     umount $SCRATCH_DEV 2>/dev/null
> +     exit
> +fi
> +
> +if ! _scratch_unmount; then
> +     echo "failed to umount"
> +     status=1
> +     exit
> +fi
> +_check_scratch_fs
> +status=$?
> +exit
> diff --git a/264.out b/264.out
> new file mode 100644
> index 0000000..81b50e5
> --- /dev/null
> +++ b/264.out
> @@ -0,0 +1,5 @@
> +QA output created by 264
> +
> +Run fsstress
> +
> +Run dd writers in parallel
> diff --git a/group b/group
> index 2a8970c..e79c29b 100644
> --- a/group
> +++ b/group
> @@ -377,3 +377,4 @@ deprecated
>  261 auto quick quota
>  262 auto quick quota
>  263 rw auto quick
> +264 auto rw prealloc ioctl enospc

Looks good to me.

Reviewed-By: Phil White <pwhite@xxxxxxx>
Tested-By: Phil White <pwhite@xxxxxxx>

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