#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2021 Red Hat Inc.  All Rights Reserved.
#
# FS QA Test 638
#
# This case mmaps several pages of a file, alloc pages, copy data with pages
# overlapping, e.g:
#       +-----------------------+
#       |        (copy)         |
#       |                       V
#    +---------------+---------------+------------
#    |AAAA| ........ |AAAA| ... |AAAA|AAAA|
#    +---------------+---------------+------------
#                       |            ^
#                       |   (copy)   |
#                       +------------+
#
# This's a regression test cover kernel commit:
#   4f06dd92b5d0 ("fuse: fix write deadlock")
#
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

# remove previous $seqres.full before test
rm -f $seqres.full

# real QA test starts here
_supported_fs generic
_require_test
_require_test_program "t_mmap_writev_overlap"

pagesize=`getconf PAGE_SIZE`
testfile=$TEST_DIR/mmap-writev-overlap
$XFS_IO_PROG -f -c "truncate 0" $testfile
$here/src/t_mmap_writev_overlap -b $pagesize -c 2 -l 64 $testfile

echo "Silence is golden"
# success, all done
status=0
exit