[PATCH] xfstests: btrfs: add test case for qgroup account on shared extents

[Liu Bo <bo.li.liu@oracle.com>]

This is a regression test of
'commit fcebe4562dec ("Btrfs: rework qgroup accounting")'

It can produce qgroup related warnings.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
---
 tests/btrfs/017     | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/btrfs/017.out |  3 +++
 tests/btrfs/group   |  1 +
 3 files changed, 78 insertions(+)
 create mode 100755 tests/btrfs/017
 create mode 100644 tests/btrfs/017.out

diff --git a/tests/btrfs/017 b/tests/btrfs/017
new file mode 100755
index 0000000..fc0e671
--- /dev/null
+++ b/tests/btrfs/017
@@ -0,0 +1,74 @@
+#! /bin/bash
+# FS QA Test No. 017
+#
+# Regression of 'commit fcebe4562dec ("Btrfs: rework qgroup accounting")',
+# this will throw a warning into dmesg.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2014 Liu Bo.  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 /
+    rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+
+_need_to_be_root
+_supported_fs btrfs
+_supported_os Linux
+_require_scratch
+_require_cloner
+ 
+run_check _scratch_mkfs "-b 1g --nodesize 4096"
+run_check _scratch_mount
+
+run_check $XFS_IO_PROG -f -d -c "pwrite 0 8K" $SCRATCH_MNT/foo
+
+_run_btrfs_util_prog subvolume snapshot $SCRATCH_MNT $SCRATCH_MNT/snap
+
+run_check $CLONER_PROG -s 0 -d 0 -l 8192 $SCRATCH_MNT/foo $SCRATCH_MNT/foo-reflink
+run_check $CLONER_PROG -s 0 -d 0 -l 8192 $SCRATCH_MNT/foo $SCRATCH_MNT/snap/foo-reflink
+run_check $CLONER_PROG -s 0 -d 0 -l 8192 $SCRATCH_MNT/foo $SCRATCH_MNT/snap/foo-reflink2
+
+_run_btrfs_util_prog quota enable $SCRATCH_MNT
+_run_btrfs_util_prog quota rescan -w $SCRATCH_MNT
+
+rm -fr $SCRATCH_MNT/* >/dev/null 2>&1
+
+_run_btrfs_util_prog filesystem sync $SCRATCH_MNT
+
+$BTRFS_UTIL_PROG qgroup show $SCRATCH_MNT | $SED_PROG -n '/[0-9]/p' | $AWK_PROG '{print $2" "$3}'
+
+# success, all done
+status=0
+exit
diff --git a/tests/btrfs/017.out b/tests/btrfs/017.out
new file mode 100644
index 0000000..e25e631
--- /dev/null
+++ b/tests/btrfs/017.out
@@ -0,0 +1,3 @@
+QA output created by 017
+4096 4096
+4096 4096
diff --git a/tests/btrfs/group b/tests/btrfs/group
index abb2fe4..e29999b 100644
--- a/tests/btrfs/group
+++ b/tests/btrfs/group
@@ -19,6 +19,7 @@
 014 auto balance
 015 auto quick snapshot
 016 auto quick send
+017 auto quick qgroup
 018 auto quick subvol
 019 auto quick send
 020 auto quick replace
-- 
1.8.2.1