btrfs: new case to run device replace and remount with different compress algorithms simultaneously

Run btrfs replace operations and remount with different compress
algorithms simultaneously with fsstress running in background.

Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

tests/btrfs/071

@@ -0,0 +1,123 @@
+#! /bin/bash
+# FSQA Test No. btrfs/071
+#
+# Run btrfs replace operations and remount with different compress
+# algorithms simultaneously with fsstress running in background.
+#
+#-----------------------------------------------------------------------
+# Copyright (C) 2014 Red Hat 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
+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
+# we check scratch dev after each loop
+_require_scratch_nocheck
+_require_scratch_dev_pool 5
+_require_scratch_dev_pool_equal_size
+_btrfs_get_profile_configs replace
+
+rm -f $seqres.full
+
+run_test()
+{
+	local mkfs_opts=$1
+	local saved_scratch_dev_pool=$SCRATCH_DEV_POOL
+
+	echo "Test $mkfs_opts" >>$seqres.full
+
+	# remove the last device from the SCRATCH_DEV_POOL list so
+	# _scratch_pool_mkfs won't use all devices in pool
+	local last_dev="`echo $SCRATCH_DEV_POOL | $AWK_PROG '{print $NF}'`"
+	SCRATCH_DEV_POOL=`echo $SCRATCH_DEV_POOL | sed -e "s# *$last_dev *##"`
+	_scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
+	# make sure we created btrfs with desired options
+	if [ $? -ne 0 ]; then
+		echo "mkfs $mkfs_opts failed"
+		SCRATCH_DEV_POOL=$saved_scratch_dev_pool
+		return
+	fi
+	_scratch_mount >>$seqres.full 2>&1
+	SCRATCH_DEV_POOL=$saved_scratch_dev_pool
+
+	args=`_scale_fsstress_args -p 20 -n 100 $FSSTRESS_AVOID -d $SCRATCH_MNT/stressdir`
+	echo "Run fsstress $args" >>$seqres.full
+	$FSSTRESS_PROG $args >/dev/null 2>&1 &
+	fsstress_pid=$!
+
+	echo -n "Start replace worker: " >>$seqres.full
+	_btrfs_stress_replace $SCRATCH_MNT >>$seqres.full 2>&1 &
+	replace_pid=$!
+	echo "$replace_pid" >>$seqres.full
+
+	echo -n "Start remount worker: " >>$seqres.full
+	_btrfs_stress_remount_compress $SCRATCH_MNT >/dev/null 2>&1 &
+	remount_pid=$!
+	echo "$remount_pid" >>$seqres.full
+
+	echo "Wait for fsstress to exit and kill all background workers" >>$seqres.full
+	wait $fsstress_pid
+	kill $replace_pid $remount_pid
+	wait
+
+	# wait for the remount and replace operations to finish
+	while ps aux | grep "replace start" | grep -qv grep; do
+		sleep 1
+	done
+	while ps aux | grep "mount.*$SCRATCH_MNT" | grep -qv grep; do
+		sleep 1
+	done
+
+	echo "Scrub the filesystem" >>$seqres.full
+	$BTRFS_UTIL_PROG scrub start -B $SCRATCH_MNT >>$seqres.full 2>&1
+	if [ $? -ne 0 ]; then
+		echo "Scrub find errors in \"$mkfs_opts\" test" | tee -a $seqres.full
+	fi
+
+	_scratch_unmount
+	# we called _require_scratch_nocheck instead of _require_scratch
+	# do check after test for each profile config
+	_check_scratch_fs
+}
+
+echo "Silence is golden"
+for t in "${_btrfs_profile_configs[@]}"; do
+	run_test "$t"
+done
+
+status=0
+exit

tests/btrfs/071.out

@@ -0,0 +1,2 @@
+QA output created by 071
+Silence is golden

tests/btrfs/group

@@ -73,3 +73,4 @@
 068 auto subvol remount compress
 069 auto replace scrub
 070 auto replace defrag compress
+071 auto replace remount compress