On Wed, Jul 20, 2016 at 8:34 AM, Wang Xiaoguang
<wangxg.fnst@xxxxxxxxxxxxxx> wrote:
> Currently in btrfs, there is something wrong with data space reservation.
> For example, if we try to preallocate more than haf of whole fs space,
> ENOSPC will occur, but indeed fs still has free space to satisfy this
> request.
>
> To easily reproduce this bug, this test case needs fs is mixed mode(btrfs
> specific), so put this test case in btrfs group, not generic group.
Why does it need to be in mixed mode (why is it easier)? As far as I
can see from the corresponding btrfs patch (and its description),
the problem affects non-mixed mode, therefore it could be a generic test.
>
> Signed-off-by: Wang Xiaoguang <wangxg.fnst@xxxxxxxxxxxxxx>
> ---
> tests/btrfs/127 | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++
> tests/btrfs/127.out | 2 ++
> tests/btrfs/group | 1 +
> 3 files changed, 64 insertions(+)
> create mode 100755 tests/btrfs/127
> create mode 100644 tests/btrfs/127.out
>
> diff --git a/tests/btrfs/127 b/tests/btrfs/127
> new file mode 100755
> index 0000000..f95c72f
> --- /dev/null
> +++ b/tests/btrfs/127
> @@ -0,0 +1,61 @@
> +#! /bin/bash
> +# FS QA Test 127
> +#
> +# Test whether fallocate(2) can preallocate half of the whole fs space.
> +#
> +#-----------------------------------------------------------------------
> +# Copyright (c) 2016 Fujitsu. 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
> +#-----------------------------------------------------------------------
> +#
> +
> +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
> +
> +# remove previous $seqres.full before test
> +rm -f $seqres.full
> +
> +# real QA test starts here
> +
> +# Modify as appropriate.
> +_supported_fs btrfs
> +_supported_os Linux
> +_require_scratch
> +
> +MKFS_OPTIONS="-M"
This now overrides any specific mkfs options specified in the command
line, doesn't it?
> +_scratch_mkfs_sized $((256 * 1024 * 1024)) >> $seqres.full 2>&1
> +_scratch_mount
> +
> +$XFS_IO_PROG -f -c "falloc 0 128M" $SCRATCH_MNT/testfile | _filter_xfs_io
No need for the filter here.
> +
> +echo "Silence is golden"
> +status=0
> +exit
> diff --git a/tests/btrfs/127.out b/tests/btrfs/127.out
> new file mode 100644
> index 0000000..0af84c0
> --- /dev/null
> +++ b/tests/btrfs/127.out
> @@ -0,0 +1,2 @@
> +QA output created by 127
> +Silence is golden
> diff --git a/tests/btrfs/group b/tests/btrfs/group
> index a21a80a..4c3ac00 100644
> --- a/tests/btrfs/group
> +++ b/tests/btrfs/group
> @@ -129,3 +129,4 @@
> 124 auto replace
> 125 auto replace
> 126 auto quick qgroup
> +127 auto quick metadata enospc
> --
> 2.9.0
>
>
>
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