btrfs: add new clone overwrite regression test

This test uses the newly added cloner binary to dispatch full file and
range specific clone (reflink) requests.

Signed-off-by: David Disseldorp <ddiss@suse.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

tests/btrfs/035

@@ -0,0 +1,77 @@
+#!/bin/bash
+# FS QA Test No. btrfs/035
+#
+# Regression test for overwriting clones
+#
+#-----------------------------------------------------------------------
+# Copyright (C) 2014 SUSE Linux Products GmbH. 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!
+
+_cleanup()
+{
+    rm -f $tmp.*
+}
+
+trap "_cleanup ; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_supported_fs btrfs
+_supported_os Linux
+_require_scratch
+
+_scratch_mkfs > /dev/null 2>&1
+_scratch_mount
+
+CLONER_PROG=$here/src/cloner
+[ -x $CLONER_PROG ] || _notrun "cloner binary not present at $CLONER_PROG"
+
+src_str="aaaaaaaaaa"
+
+echo -n "$src_str" > $SCRATCH_MNT/src
+
+$CLONER_PROG $SCRATCH_MNT/src  $SCRATCH_MNT/src.clone1
+
+src_str="bbbbbbbbbbcccccccccc"
+
+echo -n "$src_str" > $SCRATCH_MNT/src
+
+$CLONER_PROG $SCRATCH_MNT/src $SCRATCH_MNT/src.clone2
+
+snap_src_sz=`ls -lah $SCRATCH_MNT/src.clone1 | awk '{print $5}'`
+echo "attempting ioctl (src.clone1 src)"
+$CLONER_PROG -s 0 -d 0 -l ${snap_src_sz} \
+	$SCRATCH_MNT/src.clone1 $SCRATCH_MNT/src
+
+snap_src_sz=`ls -lah $SCRATCH_MNT/src.clone2 | awk '{print $5}'`
+echo "attempting ioctl (src.clone2 src)"
+$CLONER_PROG -s 0 -d 0 -l ${snap_src_sz} \
+	$SCRATCH_MNT/src.clone2 $SCRATCH_MNT/src
+
+status=0 ; exit

tests/btrfs/035.out

@@ -0,0 +1,3 @@
+QA output created by 035
+attempting ioctl (src.clone1 src)
+attempting ioctl (src.clone2 src)

tests/btrfs/group

@@ -37,3 +37,4 @@
 032 auto quick
 033 auto quick
 034 auto quick
+035 auto quick