#! /bin/bash
# FS QA Test No. 140
#
# Try to ENOSPC while expanding the refcntbt by CoWing every other block
# of a file that eats the whole AG.
#
#-----------------------------------------------------------------------
# Copyright (c) 2015, Oracle and/or its affiliates.  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 -rf "$tmp".* "$testdir"
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter
. ./common/reflink

# real QA test starts here
_supported_os Linux
_require_scratch_reflink
_require_cp_reflink

rm -f "$seqres.full"

echo "Format and mount"
_scratch_mkfs -d agsize=$((32 * 1048576)) > "$seqres.full" 2>&1
_scratch_mount >> "$seqres.full" 2>&1

testdir="$SCRATCH_MNT/test-$seq"
rm -rf "$testdir"
mkdir "$testdir"
blksz="$(stat -f -c '%S' "$testdir")"

echo "Create the original files"
sz=$((48 * 1048576))
nr=$((sz / blksz))
_pwrite_byte 0x61 0 $sz "$testdir/file1" >> "$seqres.full"
_cp_reflink "$testdir/file1" "$testdir/file2" >> "$seqres.full"
_pwrite_byte 0x61 0 $sz "$testdir/file2.chk" >> "$seqres.full"
_scratch_remount

echo "Compare files"
cmp -s "$testdir/file1" "$testdir/file2" || echo "file1 and file2 do not match"
cmp -s "$testdir/file2" "$testdir/file2.chk" || echo "file2 and file2.chk do not match"

echo "CoW every other block"
seq 1 2 $((nr - 1)) | while read f; do
	_pwrite_byte 0x62 $((f * blksz)) $blksz "$testdir/file2" >> "$seqres.full"
	_pwrite_byte 0x62 $((f * blksz)) $blksz "$testdir/file2.chk" >> "$seqres.full"
done
_scratch_remount

echo "Compare files"
! cmp -s "$testdir/file1" "$testdir/file2" || echo "file1 and file2 must not match"
cmp -s "$testdir/file2" "$testdir/file2.chk" || echo "file2 and file2.chk do not match"

echo "Check scratch fs"
umount "$SCRATCH_MNT"

# success, all done
status=0
exit