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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# FS QA Test No. 654
#
# See what happens if we MMAP CoW blocks 2-4 of a page's worth of blocks when
# the second block is delalloc. (MMAP version of generic/222,227)
#
# This test is dependent on the system page size, so we cannot use md5 in
# the golden output; we can only compare to a check file.
#
. ./common/preamble
_begin_fstest auto quick clone fiemap prealloc
# Import common functions.
. ./common/filter
. ./common/reflink
# real QA test starts here
_require_scratch_reflink
_require_xfs_io_command "falloc"
pagesz=$(getconf PAGE_SIZE)
blksz=$((pagesz / 4))
echo "Format and mount"
_scratch_mkfs_blocksized $blksz > $seqres.full 2>&1
_scratch_mount >> $seqres.full 2>&1
testdir=$SCRATCH_MNT/test-$seq
mkdir $testdir
real_blksz=$(_get_file_block_size $testdir)
test $real_blksz != $blksz && _notrun "Failed to format with small blocksize."
echo "Create the original files"
_pwrite_byte 0x61 0 $pagesz $testdir/file1 >> $seqres.full
$XFS_IO_PROG -f -c "truncate $pagesz" $testdir/file2 >> $seqres.full
$XFS_IO_PROG -f -c "truncate $pagesz" $testdir/file2.chk >> $seqres.full
_reflink_range $testdir/file1 $blksz $testdir/file2 $((blksz * 2)) $blksz >> $seqres.full
_pwrite_byte 0x61 $((blksz * 2)) $blksz $testdir/file2.chk >> $seqres.full
_scratch_cycle_mount
echo "Compare files"
cmp -s $testdir/file1 $testdir/file2 && echo "file1 and file2 should not match."
cmp -s $testdir/file2 $testdir/file2.chk || echo "file2 and file2.chk don't match."
echo "CoW and unmount"
_pwrite_byte 0x61 $blksz $blksz $testdir/file2 >> $seqres.full
_pwrite_byte 0x61 $blksz $blksz $testdir/file2.chk >> $seqres.full
_pwrite_byte 0x61 $((blksz * 3)) $blksz $testdir/file2 >> $seqres.full
_pwrite_byte 0x61 $((blksz * 3)) $blksz $testdir/file2.chk >> $seqres.full
# make sure we actually got delalloc block
$FILEFRAG_PROG -v $testdir/file2 2>&1 | grep -q delalloc || \
_notrun "test requires delayed allocation writes"
$XFS_IO_PROG -f -c "mmap 0 $pagesz" \
-c "mwrite -S 0x63 $((blksz + 17)) $((blksz * 3 - 34))" $testdir/file2 >> $seqres.full
$XFS_IO_PROG -f -c "mmap 0 $pagesz" \
-c "mwrite -S 0x63 $((blksz + 17)) $((blksz * 3 - 34))" $testdir/file2.chk >> $seqres.full
_scratch_cycle_mount
echo "Compare files"
cmp -s $testdir/file1 $testdir/file2 && echo "file1 and file2 should not match."
cmp -s $testdir/file2 $testdir/file2.chk || echo "file2 and file2.chk don't match."
# success, all done
status=0
exit
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