tests/generic/492

#! /bin/bash
# FS QA Test 492
#
# Test the online filesystem label set/get ioctls
#
#-----------------------------------------------------------------------
# Copyright (c) 2018 Red Hat, Inc.  All Rights Reserved.
# Author: Eric Sandeen <sandeen@redhat.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()
{
	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

_supported_fs generic
_supported_os Linux
_require_scratch
_require_xfs_io_command "label"
_require_label_get_max

_scratch_mkfs > $seqres.full 2>&1
_scratch_mount

# Make sure we can set & clear the label
$XFS_IO_PROG -c "label -s label.$seq" $SCRATCH_MNT
$XFS_IO_PROG -c "label" $SCRATCH_MNT

$XFS_IO_PROG -c "label -c" $SCRATCH_MNT
$XFS_IO_PROG -c "label" $SCRATCH_MNT

# And that userspace can see it now, while mounted
# NB: some blkid has trailing whitespace, filter it out here
$XFS_IO_PROG -c "label -s label.$seq" $SCRATCH_MNT
$XFS_IO_PROG -c "label" $SCRATCH_MNT
blkid -s LABEL $SCRATCH_DEV | _filter_scratch | sed -e "s/ $//g"

# And that the it is still there when it's unmounted
_scratch_unmount
blkid -s LABEL $SCRATCH_DEV | _filter_scratch | sed -e "s/ $//g"

# And that it persists after a remount
_scratch_mount
$XFS_IO_PROG -c "label" $SCRATCH_MNT

# And that a too-long label is rejected, beyond the interface max:
fs_label=$(perl -e "print 'l' x 257;")
$XFS_IO_PROG -c "label -s $fs_label" $SCRATCH_MNT

# And it succeeds right at the filesystem max:
max_label_len=$(_label_get_max)
fs_label=$(perl -e "print 'o' x $max_label_len;")
$XFS_IO_PROG -c "label -s $fs_label" $SCRATCH_MNT | sed -e 's/o\+/MAXLABEL/'

# And that it fails past the filesystem max:
let toolong_label_len=max_label_len+1
fs_label=$(perl -e "print 'o' x $toolong_label_len;")
$XFS_IO_PROG -c "label -s $fs_label " $SCRATCH_MNT

# success, all done
status=0
exit