tests/generic/495

#! /bin/bash
# FS QA Test 495
#
# Test invalid swap files.
#
#-----------------------------------------------------------------------
# Copyright (c) 2018 Facebook.  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

_supported_fs generic
_supported_os Linux
_require_scratch_swapfile
_require_test_program mkswap
_require_test_program swapon

_scratch_mkfs >> $seqres.full 2>&1
_scratch_mount

echo "File with holes"
# We can't use _format_swapfile because we're using our custom mkswap and
# swapon.
touch "$SCRATCH_MNT/swap"
$CHATTR_PROG +C "$SCRATCH_MNT/swap" >> $seqres.full 2>&1
chmod 0600 "$SCRATCH_MNT/swap"
$XFS_IO_PROG -c "truncate $(($(get_page_size) * 10))" "$SCRATCH_MNT/swap"
"$here/src/mkswap" "$SCRATCH_MNT/swap"
"$here/src/swapon" "$SCRATCH_MNT/swap"
swapoff "$SCRATCH_MNT/swap" >/dev/null 2>&1

echo "Empty swap file (only swap header)"
rm -f "$SCRATCH_MNT/swap"
touch "$SCRATCH_MNT/swap"
$CHATTR_PROG +C "$SCRATCH_MNT/swap" >> $seqres.full 2>&1
chmod 0600 "$SCRATCH_MNT/swap"
_pwrite_byte 0x61 0 $(get_page_size) "$SCRATCH_MNT/swap" >> $seqres.full
"$here/src/mkswap" "$SCRATCH_MNT/swap"
"$here/src/swapon" "$SCRATCH_MNT/swap"
swapoff "$SCRATCH_MNT/swap" >/dev/null 2>&1

status=0
exit