#! /bin/bash
# FS QA Test No. 134
#
# Ensure that we can reflink the last block of a file whose size isn't
# block-aligned.
#   - Create two 'a' files file whose size isn't block-aligned.
#   - Create two 'b' files file whose size isn't block-aligned.
#   - Reflink the last block of file1 to the last block in file2 and file3.
#   - Check that files 1-2 match, 3-4 don't match, and that nothing matches 3.
#   - Check that the ends of 1-3 match, and 1-3 do not match the end of file4.
#
#-----------------------------------------------------------------------
# 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_test_reflink

rm -f "$seqres.full"

testdir="$TEST_DIR/test-$seq"
rm -rf "$testdir"
mkdir "$testdir"

echo "Create the original files"
blksz=65536
_pwrite_byte 0x61 0 $((blksz + 37)) "$testdir/file1" >> "$seqres.full"
_pwrite_byte 0x61 0 $((blksz + 37)) "$testdir/file2" >> "$seqres.full"
_pwrite_byte 0x62 0 $((blksz + 37)) "$testdir/file3" >> "$seqres.full"
_pwrite_byte 0x62 0 $((blksz + 37)) "$testdir/file4" >> "$seqres.full"
_test_remount

md5sum "$testdir/file1" | _filter_test_dir
md5sum "$testdir/file2" | _filter_test_dir
md5sum "$testdir/file3" | _filter_test_dir
md5sum "$testdir/file4" | _filter_test_dir

c1="$(_md5_checksum $testdir/file1)"
c2="$(_md5_checksum $testdir/file2)"
c3="$(_md5_checksum $testdir/file3)"
c4="$(_md5_checksum $testdir/file4)"

test "${c1}" = "${c2}" || echo "file1 and file2 should match"
test "${c1}" != "${c3}" || echo "file1 and file3 should not match"
test "${c1}" != "${c4}" || echo "file1 and file4 should not match"
test "${c2}" != "${c3}" || echo "file2 and file3 should not match"
test "${c2}" != "${c4}" || echo "file2 and file4 should not match"
test "${c3}" = "${c4}" || echo "file3 and file4 should match"

echo "Reflink the last blocks together, 1-2 1-3"
_reflink_range "$testdir/file1" $blksz "$testdir/file2" $blksz 37 >> "$seqres.full"
_reflink_range "$testdir/file1" $blksz "$testdir/file3" $blksz 37 >> "$seqres.full"
_test_remount

md5sum "$testdir/file1" | _filter_test_dir
md5sum "$testdir/file2" | _filter_test_dir
md5sum "$testdir/file3" | _filter_test_dir
md5sum "$testdir/file4" | _filter_test_dir

c1="$(_md5_checksum $testdir/file1)"
c2="$(_md5_checksum $testdir/file2)"
c3="$(_md5_checksum $testdir/file3)"
c4="$(_md5_checksum $testdir/file4)"

echo "Compare files"
test "${c1}" = "${c2}" || echo "file1 and file2 should match"
test "${c1}" != "${c3}" || echo "file1 and file3 should not match"
test "${c1}" != "${c4}" || echo "file1 and file4 should not match"
test "${c2}" != "${c3}" || echo "file2 and file3 should not match"
test "${c2}" != "${c4}" || echo "file2 and file4 should not match"
test "${c3}" != "${c4}" || echo "file3 and file4 should match"

echo "Compare sections"
_compare_range "$testdir/file1" $blksz "$testdir/file2" $blksz 37 \
       || echo "End sections of files 1-2 do not match"

_compare_range "$testdir/file1" $blksz "$testdir/file3" $blksz 37 \
       || echo "End sections of files 1-3 do not match"

_compare_range "$testdir/file1" $blksz "$testdir/file4" $blksz 37 \
       || echo "End sections of files 1-4 do not match (intentional)"

_compare_range "$testdir/file2" $blksz "$testdir/file3" $blksz 37 \
       || echo "End sections of files 2-3 do not match"

_compare_range "$testdir/file2" $blksz "$testdir/file4" $blksz 37 \
       || echo "End sections of files 2-4 do not match (intentional)"

_compare_range "$testdir/file3" $blksz "$testdir/file4" $blksz 37 \
       || echo "End sections of files 3-4 do not match (intentional)"

# success, all done
status=0
exit