--- /dev/null	Mon Aug  5 17:19:43 2019
+++ new/usr/src/test/nfsgen-tests/tests/recovery/client/clntrecov_pos04.ksh	Mon Aug  5 17:19:43 2019
@@ -0,0 +1,133 @@
+#! /usr/bin/ksh -p
+#
+# CDDL HEADER START
+#
+# The contents of this file are subject to the terms of the
+# Common Development and Distribution License (the "License").
+# You may not use this file except in compliance with the License.
+#
+# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+# or http://www.opensolaris.org/os/licensing.
+# See the License for the specific language governing permissions
+# and limitations under the License.
+#
+# When distributing Covered Code, include this CDDL HEADER in each
+# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+# If applicable, add the following below this CDDL HEADER, with the
+# fields enclosed by brackets "[]" replaced with your own identifying
+# information: Portions Copyright [yyyy] [name of copyright owner]
+#
+# CDDL HEADER END
+#
+
+#
+# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+# Use is subject to license terms.
+#
+
+#
+# NFSv4 client recovery:
+# a: Verify client recovers on write op after server reboots; 
+# try to close after reboot, expect OK
+# b: Verify client recovers on write op after after nfsd dies and
+# and restarts; try to close after nfsd restart, expect OK
+#
+
+. ${STF_SUITE}/include/nfsgen.kshlib
+
+NAME=$(basename $0)
+
+[[ :$NFSGEN_DEBUG: = *:${NAME}:* || :${NFSGEN_DEBUG}: = *:all:* ]] && set -x
+
+DIR=$(dirname $0)
+PATH=/usr/bin:$PATH
+prog=$STF_SUITE/bin/file_operator
+
+export RECOVERY_EXECUTE_PATH=$DIR
+export RECOVERY_STAT_PATH=$STF_SUITE/bin/
+
+TESTFILE="openfile.$$"
+
+if [[ ! -x $prog ]]; then
+        echo "$NAME: the executible program '$prog' not found."
+	echo "\t Test FAIL"
+        return $STF_FAIL
+fi
+
+# First check this test is not started before previous tests 
+# grace period ends.
+echo "xxx" > $MNTDIR/wait_for_grace
+rm -rf $MNTDIR/wait_for_grace > /dev/null 2>&1
+
+# Start test
+# --------------------------------------------------------------------
+function assertion_func 
+{
+   [[ :$NFSGEN_DEBUG: = *:${NAME}:* || :${NFSGEN_DEBUG}: = *:all:* ]] && set -x
+   actionType=$1
+
+   # start a process to open and write data info a file
+   # it also read those data back for check after server reboot or
+   # nfsd restart on server
+   $prog -c -W -o 4 -e $RANDOM -B "32768 1024 1024" $MNTDIR/$TESTFILE > \
+   $STF_TMPDIR/$NAME.out.$$ 2>&1 &
+   pid=$!
+
+   # wait untill prog wrote all data into the file
+   wait_now 200 "grep \"I am ready\" $STF_TMPDIR/$NAME.out.$$" \
+   > /dev/null 2>&1
+   if (( $? != 0 )); then
+        echo "$NAME: client failed to write 32MB data into $STF_TMPDIR/$NAME.out.$$ \
+                in 200 seconds"
+        cat $STF_TMPDIR/$NAME.out.$$
+        kill $pid
+        rm -f $MNTDIR/$TESTFILE* $STF_TMPDIR/$NAME.*
+        echo "\t Test FAIL"
+        return $STF_FAIL
+  fi
+
+  # reboot server or restart nfsd on server
+  $DIR/isserverup $actionType > $STF_TMPDIR/$NAME.reboot.$$ 2>&1
+  if (( $? != 0 )); then
+        echo "$NAME: failed to reboot $SERVER"
+        cat $STF_TMPDIR/$NAME.reboot.$$
+        kill $pid
+        rm -f $MNTDIR/$TESTFILE* $STF_TMPDIR/$NAME.*
+        echo "\t Test FAIL"
+        return $STF_FAIL
+  fi
+
+  # signal the test program to read data back
+  kill -16 $pid
+
+  wait $pid
+  if (( $? != 0 )); then
+        echo "wait the process with pid=$pid failed"
+        echo "\t Test FAIL"
+        kill $pid
+        rm -f $MNTDIR/$TESTFILE* $STF_TMPDIR/$NAME.*
+        return $STF_FAIL
+  fi
+
+   rm -f $MNTDIR/$TESTFILE* $STF_TMPDIR/$NAME.*
+   echo "\tTest PASS"
+   return $STF_PASS
+}
+
+
+# Start main program here:
+# ----------------------------------------------------------------------
+ASSERTION_a="Verify client recovers on write op after server reboot; \
+        try to close after reboot, expect sucess"
+ASSERTION_b="Verify client recovers on write op after after nfsd dies and \
+        and restarts; try to close after nfsd restart, expect sucess"
+
+echo "$NAME{a}: $ASSERTION"
+assertion_func "reboot"
+retcode=$?
+
+echo "$NAME{b}: $ASSERTION"
+assertion_func "reset-nfsd"
+retcode=$(($retcode+$?))
+
+(( $retcode == $STF_PASS )) && cleanup $STF_PASS || cleanup $STF_FAIL
