examples/nvme: add a reconnect example.

This is simply a dumbed down version of perf so that we don't add extra
functionality to perf that might impact its performance.

Change-Id: Ia2716a61abcc5269dafcda394d40517d156fdb2a
Signed-off-by: Seth Howell <seth.howell@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/471661
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>

examples/nvme/Makefile

@@ -34,7 +34,7 @@
 SPDK_ROOT_DIR := $(abspath $(CURDIR)/../..)
 include $(SPDK_ROOT_DIR)/mk/spdk.common.mk
 
-DIRS-y += hello_world identify perf reserve nvme_manage arbitration \
+DIRS-y += hello_world identify perf reconnect reserve nvme_manage arbitration \
 	hotplug cmb_copy
 
 DIRS-$(CONFIG_FIO_PLUGIN) += fio_plugin

examples/nvme/reconnect/.gitignore

@@ -0,0 +1 @@
+reconnect

examples/nvme/reconnect/Makefile

@@ -0,0 +1,38 @@
+#
+#  BSD LICENSE
+#
+#  Copyright (c) Intel Corporation.
+#  All rights reserved.
+#
+#  Redistribution and use in source and binary forms, with or without
+#  modification, are permitted provided that the following conditions
+#  are met:
+#
+#    * Redistributions of source code must retain the above copyright
+#      notice, this list of conditions and the following disclaimer.
+#    * Redistributions in binary form must reproduce the above copyright
+#      notice, this list of conditions and the following disclaimer in
+#      the documentation and/or other materials provided with the
+#      distribution.
+#    * Neither the name of Intel Corporation nor the names of its
+#      contributors may be used to endorse or promote products derived
+#      from this software without specific prior written permission.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+SPDK_ROOT_DIR := $(abspath $(CURDIR)/../../..)
+
+APP = reconnect
+
+include $(SPDK_ROOT_DIR)/mk/nvme.libtest.mk

test/nvmf/host/target_disconnect.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+
+testdir=$(readlink -f $(dirname $0))
+rootdir=$(readlink -f $testdir/../../..)
+source $rootdir/test/common/autotest_common.sh
+source $rootdir/test/nvmf/common.sh
+
+PLUGIN_DIR=$rootdir/examples/nvme/fio_plugin
+
+MALLOC_BDEV_SIZE=64
+MALLOC_BLOCK_SIZE=512
+
+rpc_py="$rootdir/scripts/rpc.py"
+
+function disconnect_init()
+{
+	nvmfappstart "-m 0xF0"
+
+	$rpc_py bdev_malloc_create $MALLOC_BDEV_SIZE $MALLOC_BLOCK_SIZE -b Malloc0
+
+	$rpc_py nvmf_create_transport $NVMF_TRANSPORT_OPTS
+	$rpc_py nvmf_subsystem_create nqn.2016-06.io.spdk:cnode1 -a -s SPDK00000000000001
+
+	$rpc_py nvmf_subsystem_add_ns nqn.2016-06.io.spdk:cnode1 Malloc0
+	$rpc_py nvmf_subsystem_add_listener nqn.2016-06.io.spdk:cnode1 -t $TEST_TRANSPORT -a $NVMF_FIRST_TARGET_IP -s $NVMF_PORT
+}
+
+timing_enter target_disconnect
+
+nvmftestinit
+
+disconnect_init
+
+# If perf doesn't shut down, this test will time out.
+$rootdir/examples/nvme/reconnect/reconnect -q 32 -o 4096 -w randrw -M 50 -t 20 -c 0xF -r "trtype:$TEST_TRANSPORT adrfam:IPv4 traddr:$NVMF_FIRST_TARGET_IP trsvcid:$NVMF_PORT" &
+perfpid=$!
+
+sleep 5
+kill -9 $nvmfpid
+
+sleep 2
+disconnect_init
+
+wait $perfpid
+sync
+
+trap - SIGINT SIGTERM EXIT
+rm -f $PLUGIN_DIR/example_config_extended.fio || true
+nvmftestfini
+timing_exit target_disconnect

test/nvmf/nvmf.sh

@@ -51,6 +51,10 @@ run_test suite test/nvmf/host/perf.sh $TEST_ARGS
 #run_test test/nvmf/host/identify_kernel_nvmf.sh $TEST_ARGS
 run_test suite test/nvmf/host/aer.sh $TEST_ARGS
 run_test suite test/nvmf/host/fio.sh $TEST_ARGS
+# The automated reconnect we do in this test currently only works for RDMA.
+if [ $TEST_TRANSPORT == "rdma" ]; then
+	run_test suite test/nvmf/host/target_disconnect.sh $TEST_ARGS
+fi
 
 timing_exit host