259: Test xfs fs creation with fs size close to 4 TB

mkfs.xfs failed to create xfs filesystems with 4 TB minus few bytes due
to round up error in mkfs.xfs code.
This test case is a regression test for the fs creation problem.

I've tested the test case with mkfs.xfs patch (in the form posted by
Eric Sandeen) and the test passed (and therefore the patch fixed the
issue for me).

I'm not sure whether bash guarantees at least 64-bit precision
values in its arithmetic operations.  Therefore the values are
computed in advance.

Signed-off-by: Boris Ranto <branto@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>

259

@@ -0,0 +1,71 @@
+#! /bin/bash
+# FS QA Test No. 259
+#
+# Test fs creation on 4 TB minus few bytes partition
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2011 Red Hat.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+#-----------------------------------------------------------------------
+#
+# creator
+owner=branto@redhat.com
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+status=1	# failure is the default!
+
+testfile=$TEST_DIR/259.image
+
+_cleanup()
+{
+    rm -f "$testfile"
+}
+
+trap "_cleanup ; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+
+# real QA test starts here
+_supported_fs xfs
+_supported_os Linux
+
+# Test various sizes slightly less than 4 TB
+# 4398046511103 = 2^42 - 1
+# 4398046510592 = 2^42 - 512
+# 4398046510080 = 2^42 - 1024
+# 4398046510079 = 2^42 - 1025
+# 4398046509056 = 2^42 - 2048
+# 4398046507008 = 2^42 - 4096
+
+for ddseek in 4398046511103 4398046510592 4398046510080 \
+	4398046510079 4398046509056 4398046507008;
+do
+	echo "Trying to make $ddseek B long xfs fs image"
+	rm -f "$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" -b size=512 $lofile >/dev/null || echo "mkfs failed!"
+	losetup -d $lofile
+done
+
+status=0
+
+exit

259.out

@@ -0,0 +1,7 @@
+QA output created by 259
+Trying to make 4398046511103 B long xfs fs image
+Trying to make 4398046510592 B long xfs fs image
+Trying to make 4398046510080 B long xfs fs image
+Trying to make 4398046510079 B long xfs fs image
+Trying to make 4398046509056 B long xfs fs image
+Trying to make 4398046507008 B long xfs fs image

group

@@ -372,3 +372,4 @@ deprecated
 256 auto quick
 257 dir auto quick
 258 auto quick
+259 auto quick