test/vhost: test multiple connections to a single vhost device

Two fio instancess will try to do simultaneous I/O
to a single vhost block device.

The test uses default_initiator.job as a fio config,
which apparently wasn't used anywhere and had to be
slightly adjusted to work. Specificaly, we had to
specify an empty job in the config file, as specifying
it from the command line wouldn't make it inherit
any options from the [global] section in the file.

Change-Id: I2c2a96a709c567f5c910715a5b3d85a4e28bcb97
Signed-off-by: Pawel Kaminski <pawelx.kaminski@intel.com>
Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/c/419066
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>

autotest.sh

@@ -179,6 +179,7 @@ if [ $SPDK_TEST_VHOST_INIT -eq 1 ]; then
 	timing_enter vhost_initiator
 	run_test suite ./test/vhost/initiator/blockdev.sh
 	run_test suite ./test/spdkcli/virtio.sh
+	run_test suite ./test/vhost/shared/shared.sh
 	report_test_completion "vhost_initiator"
 	timing_exit vhost_initiator
 fi

test/vhost/common/fio_jobs/default_initiator.job

@@ -7,3 +7,5 @@ do_verify=1
 verify=md5
 verify_backlog=1024
 fsync_on_close=1
+iodepth=32
+[job0]

test/vhost/shared/bdev.conf

@@ -0,0 +1,5 @@
+[VirtioUser0]
+  Path Malloc.0
+  Queues 2
+  Type Blk
+  Name VirtioBlk0

test/vhost/shared/shared.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+set -e
+SHARED_DIR=$(readlink -f $(dirname $0))
+[[ -z "$COMMON_DIR" ]] && COMMON_DIR="$(cd $SHARED_DIR/../common && pwd)"
+ROOT_DIR=$(readlink -f $SHARED_DIR/../../..)
+source $COMMON_DIR/common.sh
+PLUGIN_DIR=$ROOT_DIR/examples/bdev/fio_plugin
+FIO_PATH="/usr/src/fio"
+rpc_py="$SPDK_BUILD_DIR/scripts/rpc.py -s $(get_vhost_dir)/rpc.sock"
+
+function run_spdk_fio() {
+	LD_PRELOAD=$PLUGIN_DIR/fio_plugin $FIO_PATH/fio --ioengine=spdk_bdev \
+	"$COMMON_DIR/fio_jobs/default_initiator.job" --runtime=10 --rw=randrw \
+	--spdk_mem=1024 --spdk_single_seg=1 --spdk_conf=$SHARED_DIR/bdev.conf "$@"
+}
+
+trap 'error_exit "${FUNCNAME}" "${LINENO}"' ERR SIGTERM SIGABRT
+
+spdk_vhost_run
+
+$rpc_py construct_malloc_bdev -b Malloc 124 4096
+$rpc_py construct_vhost_blk_controller Malloc.0 Malloc
+
+run_spdk_fio --size=50% --offset=0 --filename=VirtioBlk0 &
+run_fio_pid=$!
+sleep 1
+run_spdk_fio --size=50% --offset=50% --filename=VirtioBlk0
+wait $run_fio_pid
+spdk_vhost_kill