apfstests/tests/xfs/259

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2011 Red Hat.  All Rights Reserved.
#
# FS QA Test No. 259
#
# Test fs creation on 4 TB minus few bytes partition
#
. ./common/preamble
_begin_fstest auto quick

# Override the default cleanup function.
_cleanup()
{
    rm -f "$testfile"
}

# Import common functions.
. ./common/filter

# real QA test starts here
_supported_fs xfs
_require_test
_require_loop
_require_math

testfile=$TEST_DIR/259.image

# Test various sizes slightly less than 4 TB. Need to handle different
# minimum block sizes for CRC enabled filesystems, but use a small log so we
# don't write lots of zeros unnecessarily.
sizes_to_check="4096 2048 1024 512"
blocksizes="4096 2048 1024 512"
four_TB=$(_math "2^42")
# The initial value of _fs_has_crcs is not important, because we start testing
# with 4096 block size, it only matters for 512 block size test
_fs_has_crcs=0
for del in $sizes_to_check; do
	for bs in $blocksizes; do
		echo "Trying to make (4TB - ${del}B) long xfs, block size $bs"
		# skip tests with 512 block size if the fs created has crc
		# enabled by default
		if [ $_fs_has_crcs -eq 1 -a $bs -eq 512 ]; then
			break;
		fi
		ddseek=$(_math "$four_TB - $del")
		rm -f "$testfile"
		dd if=/dev/zero "of=$testfile" bs=1 count=0 seek=$ddseek \
			>/dev/null 2>&1 || echo "dd failed"
		lofile=$(losetup -f)
		losetup $lofile "$testfile"
		$MKFS_XFS_PROG -l size=32m -b size=$bs $lofile |  _filter_mkfs \
			>/dev/null 2> $tmp.mkfs || echo "mkfs failed!"
		. $tmp.mkfs
		sync
		losetup -d $lofile
	done
done

status=0
exit