btrfs: test unmount during quota rescan

This test case tests if we are able to unmount a filesystem while
a quota rescan is running.  Up to now (4.3) this would result
in a kernel NULL pointer dereference.

Fixed by patch (btrfs: qgroup: exit the rescan worker during umount).

Signed-off-by: Justin Maggard <jmaggard@netgear.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --git a/tests/btrfs/114 b/tests/btrfs/114
new file mode 100644 (file)
index 0000000..0a0e8ba
--- /dev/null
+++ b/tests/btrfs/114
@@ -0,0 +1,61 @@
+#! /bin/bash
+# FS QA Test No. btrfs/114
+#
+# btrfs quota scan/unmount sanity test
+# Make sure that unmounting during a quota rescan doesn't crash
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015 NETGEAR, Inc.  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 $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_supported_fs btrfs
+_supported_os Linux
+_require_scratch
+
+_scratch_mkfs >>$seqres.full 2>&1
+_scratch_mount
+
+for i in `seq 0 1 450000`; do
+       echo -n > $SCRATCH_MNT/file.$i
+done
+echo 3 > /proc/sys/vm/drop_caches
+$BTRFS_UTIL_PROG quota enable $SCRATCH_MNT
+_scratch_unmount
+
+echo "Silence is golden"
+status=0
+exit

diff --git a/tests/btrfs/114.out b/tests/btrfs/114.out
new file mode 100644 (file)
index 0000000..a2aa4a2
--- /dev/null
+++ b/tests/btrfs/114.out
@@ -0,0 +1,2 @@
+QA output created by 114
+Silence is golden

diff --git a/tests/btrfs/group b/tests/btrfs/group
index c5d529fec7d5da7cea95be1bd77c7ebfc5acfa48..b0c023218de555d6754aee4ef86763c0ef648ca2 100644 (file)
--- a/tests/btrfs/group
+++ b/tests/btrfs/group
@@ -113,3 +113,4 @@
 111 auto quick send
 112 auto quick clone
 113 auto quick compress clone
+114 auto qgroup