xfs: test xfs-specific reflink pieces

Check that the various XFS tools still work properly on reflinked XFSes.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>

tests/xfs/131

@@ -0,0 +1,76 @@
+#! /bin/bash
+# FS QA Test No. 131
+#
+# Ensure that we can't reflink realtime files.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, Oracle and/or its affiliates.  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
+#-----------------------------------------------------------------------
+
+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 /
+    umount "$SCRATCH_MNT" > /dev/null 2>&1
+    rm -rf "$tmp".* "$TESTDIR" "$METADUMP_FILE"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_supported_fs xfs
+_require_realtime
+_require_scratch_reflink
+_require_cp_reflink
+
+rm -f "$seqres.full"
+
+echo "Format and mount scratch device"
+_scratch_mkfs >> "$seqres.full"
+_scratch_mount
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf "$TESTDIR"
+mkdir "$TESTDIR"
+
+echo "Create the original file blocks"
+BLKSZ=65536
+$XFS_IO_PROG -R -f -c "truncate $BLKSZ" "$TESTDIR/file1"
+
+echo "Reflink every block"
+_cp_reflink "$TESTDIR/file1" "$TESTDIR/file2" 2>&1 | _filter_scratch
+
+test -s "$TESTDIR/file2" && _fail "Should not be able to reflink a realtime file."
+
+echo "Check restored fs"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit