apfstests/tests/xfs/128

#! /bin/bash
# FS QA Test No. 128
#
# Ensure that xfs_fsr un-reflinks files while defragmenting
#
#-----------------------------------------------------------------------
# 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 -f "$tmp".*
}

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

# real QA test starts here
_supported_os Linux
_supported_fs xfs
_require_test_lsattr
_require_scratch_reflink
_require_cp_reflink

echo "Format and mount"
_scratch_mkfs > "$seqres.full" 2>&1
_scratch_mount >> "$seqres.full" 2>&1

TESTDIR="$SCRATCH_MNT/test-$seq"
rm -rf "$TESTDIR"
mkdir "$TESTDIR"
FREE_BLOCKS0=$(stat -f "$TESTDIR" -c '%f')

echo "Create the original file and reflink to file2, file3"
BLKS=2000
MARGIN=160
BLKSZ=65536
REAL_BLKSZ="$(stat -f $TESTDIR -c '%S')"
BLKSZ_FACTOR=$((BLKSZ / REAL_BLKSZ))
_pwrite_byte 0x61 0 $((BLKS * BLKSZ)) "$TESTDIR/file1" >> "$seqres.full"
_cp_reflink "$TESTDIR/file1" "$TESTDIR/file2"
_cp_reflink "$TESTDIR/file2" "$TESTDIR/file3"
_cp_reflink "$TESTDIR/file3" "$TESTDIR/file4"
_test_remount
FREE_BLOCKS1=$(stat -f "$TESTDIR" -c '%f')

md5sum "$TESTDIR/file1" | _filter_scratch
md5sum "$TESTDIR/file2" | _filter_scratch
md5sum "$TESTDIR/file3" | _filter_scratch
md5sum "$TESTDIR/file4" | _filter_scratch

C01=$(_md5_checksum "$TESTDIR/file1")
C02=$(_md5_checksum "$TESTDIR/file2")
C03=$(_md5_checksum "$TESTDIR/file3")
C04=$(_md5_checksum "$TESTDIR/file4")

echo "CoW the reflink copies"
_pwrite_byte 0x62 $BLKSZ $BLKSZ "$TESTDIR/file2" >> "$seqres.full"
_pwrite_byte 0x63 $(( BLKSZ * (BLKS - 1) )) $BLKSZ "$TESTDIR/file3" >> "$seqres.full"
_test_remount
FREE_BLOCKS2=$(stat -f "$TESTDIR" -c '%f')

md5sum "$TESTDIR/file1" | _filter_scratch
md5sum "$TESTDIR/file2" | _filter_scratch
md5sum "$TESTDIR/file3" | _filter_scratch
md5sum "$TESTDIR/file4" | _filter_scratch

C11=$(_md5_checksum "$TESTDIR/file1")
C12=$(_md5_checksum "$TESTDIR/file2")
C13=$(_md5_checksum "$TESTDIR/file3")
C14=$(_md5_checksum "$TESTDIR/file4")

echo "Defragment"
lsattr -l "$TESTDIR/" | _filter_scratch
xfs_fsr -v -d "$TESTDIR/file1" >> "$seqres.full"
xfs_fsr -v -d "$TESTDIR/file2" >> "$seqres.full" # fsr probably breaks the link
xfs_fsr -v -d "$TESTDIR/file3" >> "$seqres.full" # fsr probably breaks the link
xfs_fsr -v -d "$TESTDIR/file4" >> "$seqres.full" # fsr probably ignores this file
_test_remount
FREE_BLOCKS3=$(stat -f "$TESTDIR" -c '%f')

md5sum "$TESTDIR/file1" | _filter_scratch
md5sum "$TESTDIR/file2" | _filter_scratch
md5sum "$TESTDIR/file3" | _filter_scratch
md5sum "$TESTDIR/file4" | _filter_scratch

C21=$(_md5_checksum "$TESTDIR/file1")
C22=$(_md5_checksum "$TESTDIR/file2")
C23=$(_md5_checksum "$TESTDIR/file3")
C24=$(_md5_checksum "$TESTDIR/file4")

echo "Check files"
test $C01 = $C02 || echo "Files 1-2 do not match"
test $C01 = $C03 || echo "Files 1-3 do not match"
test $C01 = $C04 || echo "Files 1-4 do not match"
test $C02 = $C03 || echo "Files 2-3 do not match"
test $C02 = $C04 || echo "Files 2-4 do not match"
test $C03 = $C04 || echo "Files 3-4 do not match"

test $C01 = $C11 || echo "File1 should not be different after CoW"
test $C02 != $C12 || echo "File2 should be different after CoW"
test $C03 != $C13 || echo "File3 should be different after CoW"
test $C04 = $C14 || echo "File4 should not be different after CoW"

test $C11 = $C21 || echo "File1 changed by defrag"
test $C12 = $C22 || echo "File2 changed by defrag"
test $C13 = $C23 || echo "File3 changed by defrag"
test $C14 = $C24 || echo "File4 changed by defrag"

#echo $FREE_BLOCKS0 $FREE_BLOCKS1 $FREE_BLOCKS2 $FREE_BLOCKS3

_within_tolerance "free blocks after creating some reflink copies" $FREE_BLOCKS1 $((FREE_BLOCKS0 - (BLKS * BLKSZ_FACTOR) )) $MARGIN -v
_within_tolerance "free blocks after CoW some reflink copies" $FREE_BLOCKS2 $((FREE_BLOCKS1 - 2)) $MARGIN -v
_within_tolerance "free blocks after defragging all reflink copies" $FREE_BLOCKS3 $((FREE_BLOCKS2 - (BLKS * 2 * BLKSZ_FACTOR))) $MARGIN -v
_within_tolerance "free blocks after all tests" $FREE_BLOCKS3 $((FREE_BLOCKS0 - (BLKS * 3 * BLKSZ_FACTOR))) $MARGIN -v

echo "Check scratch fs"
umount "$SCRATCH_MNT"
_check_scratch_fs

# success, all done
status=0
exit