apfstests/tests/overlay/001

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016 Red Hat Inc. All Rights Reserved.
#
# FS QA Test 001
#
# Test copy up files from lower dir that are <, =, > 4G in size.
#
# Kernel commit 0480334fa604 ("ovl: use O_LARGEFILE in ovl_copy_up()")
# fixed bug when copying up large file from lower dir.
#
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 overlay
_supported_os Linux
_require_scratch

# Remove all files from previous tests
_scratch_mkfs

# overlay copy_up doesn't deal with sparse file well, holes will be filled by
# zeros, so at least (4G + 4G + 8k) free space is needed on scratch base fs
_require_fs_space $OVL_BASE_SCRATCH_MNT $((4*1024*1024*2 + 8))

# Create test files with different sizes in lower dir
lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
mkdir -p $lowerdir
touch $lowerdir/zero_size
$XFS_IO_PROG -fc "pwrite 0 4k" $lowerdir/less_than_4g >>$seqres.full
$XFS_IO_PROG -fc "pwrite 4294963200 4k" $lowerdir/4gfile >>$seqres.full
$XFS_IO_PROG -fc "pwrite 4g 4k" $lowerdir/larger_than_4g >>$seqres.full

_scratch_mount

echo "Silence is golden"

# Open the files should succeed, no errors are expected (e.g. EFBIG)
for f in $SCRATCH_MNT/*; do
	$XFS_IO_PROG -c "open" $f >>$seqres.full
done

# success, all done
status=0
exit