[PATCH 3/3] xfstests: dedupe with random io race test

[Zorro Lang <zlang@redhat.com>]

Run several duperemove processes with fsstress on same directory at
same time. Make sure the race won't break the fs or kernel.

Signed-off-by: Zorro Lang <zlang@redhat.com>
---
 tests/shared/010     | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/shared/010.out |   2 +
 tests/shared/group   |   1 +
 3 files changed, 114 insertions(+)
 create mode 100755 tests/shared/010
 create mode 100644 tests/shared/010.out

diff --git a/tests/shared/010 b/tests/shared/010
new file mode 100755
index 00000000..b9618ee6
--- /dev/null
+++ b/tests/shared/010
@@ -0,0 +1,111 @@
+#! /bin/bash
+# FS QA Test 010
+#
+# Dedup & random I/O race test, do multi-threads fsstress and dedupe on
+# same directory/files
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2018 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	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+	cd /
+	rm -f $tmp.*
+	kill_all_stress
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+
+# duperemove only supports btrfs and xfs (with reflink feature).
+# Add other filesystems if it supports more later.
+_supported_fs xfs btrfs
+_supported_os Linux
+_require_scratch_dedupe
+_require_command "$DUPEREMOVE_PROG" duperemove
+_require_command "$KILLALL_PROG" killall
+
+_scratch_mkfs > $seqres.full 2>&1
+_scratch_mount >> $seqres.full 2>&1
+
+function kill_all_stress()
+{
+	local f=1
+	local d=1
+
+	# kill the bash process which loop run duperemove
+	if [ -n "$loop_dedup_pid" ]; then
+		kill $loop_dedup_pid > /dev/null 2>&1
+		wait $loop_dedup_pid > /dev/null 2>&1
+		loop_dedup_pid=""
+	fi
+
+	# Make sure all fsstress and duperemove processes get killed
+	while [ $((f + d)) -ne 0 ]; do
+		$KILLALL_PROG -q $FSSTRESS_PROG > /dev/null 2>&1
+		$KILLALL_PROG -q $DUPEREMOVE_PROG > /dev/null 2>&1
+		f=`ps -eLf | grep $FSSTRESS_PROG | grep -v "grep" | wc -l`
+		d=`ps -eLf | grep $DUPEREMOVE_PROG | grep -v "grep" | wc -l`
+		sleep 2
+	done
+}
+
+SLEEP_TIME=$((50 * TIME_FACTOR))
+
+# Start fsstress
+fsstress_opts="-r -n 1000 -p $((5 * LOAD_FACTOR))"
+$FSSTRESS_PROG $fsstress_opts -d $SCRATCH_MNT -l 0 >> $seqres.full 2>&1 &
+loop_dedup_pid=""
+# Start several dedupe processes on same directory
+for ((i = 0; i < $((2 * LOAD_FACTOR)); i++)); do
+	while true; do
+		$DUPEREMOVE_PROG -dr --dedupe-options=same $SCRATCH_MNT/ \
+			>>$seqres.full 2>&1
+	done &
+	loop_dedup_pid="$! $loop_dedup_pid"
+done
+
+# End the test after $SLEEP_TIME seconds
+sleep $SLEEP_TIME
+kill_all_stress
+
+# umount and mount again, verify pagecache contents don't mutate and a fresh
+# read from the disk also doesn't show mutations.
+find $testdir -type f -exec md5sum {} \; > $TEST_DIR/${seq}md5.sum
+_scratch_cycle_mount
+md5sum -c --quiet $TEST_DIR/${seq}md5.sum
+
+echo "Silence is golden"
+status=0
+exit
diff --git a/tests/shared/010.out b/tests/shared/010.out
new file mode 100644
index 00000000..1d83a8d6
--- /dev/null
+++ b/tests/shared/010.out
@@ -0,0 +1,2 @@
+QA output created by 010
+Silence is golden
diff --git a/tests/shared/group b/tests/shared/group
index 2255844b..9ab88bac 100644
--- a/tests/shared/group
+++ b/tests/shared/group
@@ -12,6 +12,7 @@
 007 dangerous_fuzzers
 008 auto quick dedupe
 009 auto dedupe
+010 auto dedupe
 032 mkfs auto quick
 272 auto enospc rw
 289 auto quick
-- 
2.14.3