#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2018 Intel Corporation.  All Rights Reserved.
#
# FS QA Test No. 503
#
# This is a regression test for kernel patch:
#   ext4: handle layout changes to pinned DAX mapping
#
# This test exercises each of the DAX paths in ext4 which remove blocks from
# an inode's block map.  This includes things like hole punch, truncate down,
# etc.  This test was written to regression test errors seen with an ext4 +
# DAX setup, but the test runs fine with or without DAX and with XFS so we
# don't require the DAX mount option or a specific filesystem for the test.

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

# Modify as appropriate.
_supported_fs generic
_supported_os Linux
_require_test
_require_scratch
_require_test_program "t_mmap_collision"
_require_xfs_io_command "falloc"
_require_xfs_io_command "fpunch"
_require_xfs_io_command "fcollapse"
_require_xfs_io_command "fzero"

_scratch_mkfs >> $seqres.full 2>&1
# To get the failure we turn off DAX on our SCRATCH_MNT so we can get O_DIRECT
# behavior.  We will continue to use unmodified mount options for the test
# TEST_DIR.  The failures fixed by the above mentioned kernel patch trigger
# when those mount options include "-o dax", but the test runs fine without
# that option so we don't require it.
export MOUNT_OPTIONS=""
_scratch_mount >> $seqres.full 2>&1

# real QA test starts here
$here/src/t_mmap_collision $TEST_DIR/testfile $SCRATCH_MNT/testfile

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