Re: [PATCH 2/9 RESEND] generic: test quota handling on remount ro failure

[Brian Foster <bfoster@redhat.com>]

On Fri, Mar 20, 2015 at 06:16:51PM +0800, Eryu Guan wrote:
> Remount ro should not turn qouta off unconditionally, even remount ro
> failed, also kernel should not oops on the next succeeded remount ro.
> 
> Signed-off-by: Eryu Guan <eguan@redhat.com>
> ---
>  tests/generic/072     | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  tests/generic/072.out |  3 +++
>  tests/generic/group   |  1 +
>  3 files changed, 73 insertions(+)
>  create mode 100755 tests/generic/072
>  create mode 100644 tests/generic/072.out
> 
> diff --git a/tests/generic/072 b/tests/generic/072
> new file mode 100755
> index 0000000..ef40822
> --- /dev/null
> +++ b/tests/generic/072
> @@ -0,0 +1,69 @@
> +#! /bin/bash
> +# FS QA Test No. 072
> +#
> +# Test quota handling on remount ro failure
> +#
> +#-----------------------------------------------------------------------
> +# Copyright (c) 2015 Red Hat 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
> +#-----------------------------------------------------------------------
> +#
> +
> +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/quota
> +
> +# real QA test starts here
> +
> +# Modify as appropriate.
> +_supported_fs generic
> +_supported_os Linux
> +_require_test
> +_require_scratch
> +_require_quota
> +
> +rm -f $seqres.full
> +
> +_scratch_mkfs >>$seqres.full 2>&1
> +_scratch_mount "-o usrquota,grpquota"
> +
> +quotacheck -ug $SCRATCH_MNT >/dev/null 2>&1
> +quotaon $SCRATCH_MNT >/dev/null 2>&1
> +

What's the purpose of the above two commands? The quotacheck seems to
fail (masked by the redirect to /dev/null) and shouldn't quota be on by
virtue of the mount options?

> +# first remount ro with a bad option, a failed remount ro should not disable quota
> +_scratch_mount "-o remount,ro,nosuchopt" >>$seqres.full 2>&1
> +quotaon -p $SCRATCH_MNT | _filter_scratch
> +# second remount should succeed, no oops or hang expected
> +_scratch_mount "-o remount,ro"
> +

FWIW, when I '-o remount,ro,nosuchopt' on XFS the remount ro actually
succeeds and the bad option is dropped. Does that differ from other fs
behavior? If not, I wonder whether the second remount,ro is necessary
here as well.

Brian

> +# success, all done
> +status=0
> +exit
> diff --git a/tests/generic/072.out b/tests/generic/072.out
> new file mode 100644
> index 0000000..ff0e180
> --- /dev/null
> +++ b/tests/generic/072.out
> @@ -0,0 +1,3 @@
> +QA output created by 072
> +group quota on SCRATCH_MNT (SCRATCH_DEV) is on
> +user quota on SCRATCH_MNT (SCRATCH_DEV) is on
> diff --git a/tests/generic/group b/tests/generic/group
> index 03ad7b8..c0210d2 100644
> --- a/tests/generic/group
> +++ b/tests/generic/group
> @@ -74,6 +74,7 @@
>  069 rw udf auto quick
>  070 attr udf auto quick stress
>  071 auto quick prealloc
> +072 auto quick quota
>  074 rw udf auto
>  075 rw udf auto quick
>  076 metadata rw udf auto quick stress
> -- 
> 2.1.0
> 
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