+#! /bin/bash
+# FS QA Test No. btrfs/058
+#
+# Regression test for a btrfs issue where we create a RO snapshot to use for
+# a send operation which fails with a -ESTALE error, due to the presence of
+# orphan inodes accessible through the snapshot's commit root but no longer
+# present through the main root.
+#
+# This issue is fixed by the following linux kernel btrfs patch:
+#
+# Btrfs: update commit root on snapshot creation after orphan cleanup
+#
+#-----------------------------------------------------------------------
+# Copyright (C) 2014 SUSE Linux Products GmbH. All Rights Reserved.
+# Author: Filipe Manana <fdmanana@suse.com>
+#
+# 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"
+
+tmp=/tmp/$$
+status=1 # failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+ if [ ! -z $XFS_IO_PID ]; then
+ kill $XFS_IO_PID > /dev/null 2>&1
+ fi
+ rm -fr $tmp
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_supported_fs btrfs
+_supported_os Linux
+_require_scratch
+# Requiring flink command tests for the presence of the -T option used
+# to pass O_TMPFILE to open(2).
+_require_xfs_io_command "flink"
+_need_to_be_root
+
+rm -f $seqres.full
+
+_scratch_mkfs >/dev/null 2>&1
+_scratch_mount
+
+# Create a tmpfile file, write some data to it and leave it open, so that our
+# main subvolume has an orphan inode item.
+$XFS_IO_PROG -T $SCRATCH_MNT >>$seqres.full 2>&1 < <(
+ echo "pwrite 0 65536"
+ read
+) &
+XFS_IO_PID=$!
+
+# Give it some time to the xfs_io process to create the tmpfile.
+sleep 3
+
+# With the tmpfile open, create a RO snapshot and use it for a send operation.
+# The send operation used to fail with -ESTALE due to the presence of the
+# orphan inode.
+_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap
+_run_btrfs_util_prog send $SCRATCH_MNT/mysnap -f /dev/null
+
+status=0
+exit