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[PATCH] xfstests: btrfs/014: add a regression test for snapshot creation

To: <xfs@xxxxxxxxxxx>, <linux-btrfs@xxxxxxxxxxxxxxx>
Subject: [PATCH] xfstests: btrfs/014: add a regression test for snapshot creation
From: Josef Bacik <jbacik@xxxxxxxxxxxx>
Date: Fri, 27 Sep 2013 09:55:37 -0400
Delivered-to: xfs@xxxxxxxxxxx
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/simple; d=fusionio.com; s=default; t=1380290139; bh=tBDhZj5CFeCm/FD9iYu2Y0P++yzIMl89qADKRfXcp8M=; h=From:To:Subject:Date; b=eaQyDFRVaz5P/89xHI1boU5RKzjjNkAlq2yQfMmpH8y2IloW0rl4tGMuQo/hPFh4p SYXAaNzW3oa75K5W91MqjUp4SrxtK9v2xbP6H85mMOhlVbnViXdGaL/rNr5o/rDf7u eqCmce2h/dMIjKQE9KQ5ag6Kt7OXQjtNkfpuSnDE=
We had a regression where you couldn't snapshot a file system if you mounted it
ro and then remounted it rw.  This is a test that does just that to make sure we
don't have this problem again.  I ran the test without the fix and it blew up,
and then applied the fix and verified that it passed.  Thanks,

Signed-off-by: Josef Bacik <jbacik@xxxxxxxxxxxx>
---
 tests/btrfs/014     | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/btrfs/014.out |  2 ++
 tests/btrfs/group   |  1 +
 3 files changed, 64 insertions(+)
 create mode 100644 tests/btrfs/014
 create mode 100644 tests/btrfs/014.out

diff --git a/tests/btrfs/014 b/tests/btrfs/014
new file mode 100644
index 0000000..8302f5f
--- /dev/null
+++ b/tests/btrfs/014
@@ -0,0 +1,61 @@
+#! /bin/bash
+# FS QA Test No. btrfs/014
+#
+# Regression test to make sure we can create a snapshot after mounting with
+# readonly and remounting rw.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2013 Fusion IO.  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
+
+rm -f $seqres.full
+
+_scratch_mkfs > /dev/null 2>&1
+_scratch_mount -o ro
+_scratch_mount -o rw,remount
+
+$BTRFS_UTIL_PROG sub snap $SCRATCH_MNT $SCRATCH_MNT/snap >> $seqres.full 2>&1 \
+       || _fail "couldn't create snapshot"
+
+echo "Silence is golden"
+status=0 ; exit
diff --git a/tests/btrfs/014.out b/tests/btrfs/014.out
new file mode 100644
index 0000000..db5250b
--- /dev/null
+++ b/tests/btrfs/014.out
@@ -0,0 +1,2 @@
+QA output created by 014
+Silence is golden
diff --git a/tests/btrfs/group b/tests/btrfs/group
index 8a168d5..3a5747f 100644
--- a/tests/btrfs/group
+++ b/tests/btrfs/group
@@ -16,3 +16,4 @@
 011 auto
 012 auto quick
 013 auto quick
+014 auto quick
-- 
1.8.3.1

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