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apfstests/216
T
Dave Chinner 1670bd4f34 xfstests: loop devices vs umount stupidity
Unmounting a fileystem mounted on a loop device doesn't always tear
down the loop device. Its racy, and it causes tests to randomly
fail.

To avoid that, we have to use umount -d to ensure that we destroy
loop devices under filesystems in case the kernel doesn't tear it
down automatically to prevent the test from failing.  However, if
the kernel does tear it down automatically, umount now issues a
warning that it couldn't tear down the loop device because it
couldn't find it, and that causes the test to fail. *facepalm*

So, convert all the loop device unmounts to use -d, and direct the
output of all of them to /dev/null.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Rich Johnston <rjohnston@sgi.com>
Signed-off-by: Rich Johnston <rjohnston@sgi.com>
2012-08-22 15:50:46 -05:00

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#! /bin/bash
# FS QA Test No. 216
#
# log size mkfs test - ensure the log size scaling works for small filesystems
#
#-----------------------------------------------------------------------
# Copyright (c) 2008 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=dgc@sgi.com
seq=`basename $0`
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 $tmp.*
_cleanup_testdir
}
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
# real QA test starts here
_supported_fs xfs
_supported_os Linux
_setup_testdir
_require_scratch
_scratch_mkfs_xfs >/dev/null 2>&1
_scratch_mount
_require_loop
LOOP_DEV=$SCRATCH_MNT/test_fs
LOOP_MNT=$SCRATCH_MNT/test_fs_dir
_do_mkfs()
{
for i in $*; do
echo -n "fssize=${i}g "
$MKFS_XFS_PROG -f -b size=4096 -l version=2 \
-d name=$LOOP_DEV,size=${i}g |grep log
mount -o loop -t xfs $LOOP_DEV $LOOP_MNT
echo "test write" > $LOOP_MNT/test
umount -d $LOOP_MNT > /dev/null 2>&1
done
}
# make large holey file
$XFS_IO_PROG -f -c "truncate 256g" $LOOP_DEV
#make loopback mount dir
mkdir $LOOP_MNT
# walk over standard sizes (up to 256GB)
_do_mkfs 1 2 4 8 16 32 64 128 256
status=0
exit