tests/generic/140

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2015, Oracle and/or its affiliates.  All Rights Reserved.
#
# FS QA Test No. 140
#
# Ensuring that mmap copy on write through the page cache works:
#   - Reflink two files together
#   - Write to the beginning, middle, and end
#   - Check that the files are now different where we say they're different.
#
. ./common/preamble
_begin_fstest auto quick clone

# Override the default cleanup function.
_cleanup()
{
    cd /
    rm -rf $tmp.* $testdir
}

# Import common functions.
. ./common/filter
. ./common/reflink

# real QA test starts here
_require_test_reflink
_require_cp_reflink

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

echo "Create the original files"
blksz=65536
_pwrite_byte 0x61 0 $((blksz * 48 - 3)) $testdir/file1 >> $seqres.full
_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
_pwrite_byte 0x61 0 $((blksz * 48 - 3)) $testdir/file2.chk >> $seqres.full
_test_cycle_mount

echo "Compare files"
md5sum $testdir/file1 | _filter_test_dir
md5sum $testdir/file2 | _filter_test_dir
md5sum $testdir/file2.chk | _filter_test_dir

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

echo "mmap CoW the second file"
_mwrite_byte 0x62 0 17 $((blksz * 48 - 3)) $testdir/file2 >> $seqres.full
_mwrite_byte 0x62 0 17 $((blksz * 48 - 3)) $testdir/file2.chk >> $seqres.full

_mwrite_byte 0x62 $((blksz * 16 - 34)) 17 $((blksz * 48 - 3)) $testdir/file2 >> $seqres.full
_mwrite_byte 0x62 $((blksz * 16 - 34)) 17 $((blksz * 48 - 3)) $testdir/file2.chk >> $seqres.full

_mwrite_byte 0x62 $((blksz * 48 - 20)) 17 $((blksz * 48 - 3)) $testdir/file2 >> $seqres.full
_mwrite_byte 0x62 $((blksz * 48 - 20)) 17 $((blksz * 48 - 3)) $testdir/file2.chk >> $seqres.full
_test_cycle_mount

echo "Compare files"
md5sum $testdir/file1 | _filter_test_dir
md5sum $testdir/file2 | _filter_test_dir
md5sum $testdir/file2.chk | _filter_test_dir

cmp -s $testdir/file1 $testdir/file2 || echo "file1 and file2 do not match (intentional)"
cmp -s $testdir/file1 $testdir/file2.chk || echo "file1 and file2.chk do not match (intentional)"
cmp -s $testdir/file2 $testdir/file2.chk || echo "file2 and file2.chk do not match"

echo "Compare the CoW'd section to the before file"
_compare_range $testdir/file1 0 $testdir/file2 0 17 \
       || echo "Start sections do not match (intentional)"

_compare_range  $testdir/file1 $((blksz * 16 - 34)) \
		$testdir/file2 $((blksz * 16 - 34)) 17 \
       || echo "Middle sections do not match (intentional)"

_compare_range  $testdir/file1 $((blksz * 48 - 20)) \
		$testdir/file2 $((blksz * 48 - 20)) 17 \
       || echo "End sections do not match (intentional)"

echo "Compare the CoW'd section to the after file"
_compare_range $testdir/file2 0 $testdir/file2.chk 0 17 \
       || echo "Start sections do not match"

_compare_range  $testdir/file2 $((blksz * 16 - 34)) \
		$testdir/file2.chk $((blksz * 16 - 34)) 17 \
       || echo "Middle sections do not match"

_compare_range  $testdir/file2 $((blksz * 48 - 20)) \
		$testdir/file2.chk $((blksz * 48 - 20)) 17 \
       || echo "End sections do not match"

echo "Compare the not CoW'd sections"
_compare_range $testdir/file1 18 $testdir/file2 18 17 \
       || echo "Start sections of file1 and file2 do not match"

_compare_range $testdir/file2 18 $testdir/file2.chk 18 17 \
       || echo "Start sections of file2 and file2.chk do not match"

_compare_range  $testdir/file1 $((blksz * 16 - 17)) \
		$testdir/file2 $((blksz * 16 - 17)) 82 \
       || echo "Middle sections of file1 and file2 do not match"

_compare_range  $testdir/file2 $((blksz * 16 - 17)) \
		$testdir/file2.chk $((blksz * 16 - 17)) 82 \
       || echo "Middle sections of file2 and file2.chk do not match"

_compare_range  $testdir/file1 $((blksz * 48 - 120)) \
		$testdir/file2 $((blksz * 48 - 120)) 100 \
       || echo "End sections of file1 and file2 do not match"

_compare_range  $testdir/file2 $((blksz * 48 - 120)) \
		$testdir/file2.chk $((blksz * 48 - 120)) 100 \
       || echo "End sections of file2 and file2.chk do not match"

_compare_range  $testdir/file1 $((blksz * 14)) \
		$testdir/file2 $((blksz * 14)) $blksz \
       || echo "Untouched sections of file1 and file2 do not match"

_compare_range  $testdir/file2 $((blksz * 14)) \
		$testdir/file2.chk $((blksz * 14)) $blksz \
       || echo "Untouched sections of file2 and file2.chk do not match"

# success, all done
status=0
exit