[dpdk-dev] [RFC PATCH v2 7/7] example/vhost_crypto: add vhost_crypto sample application

[Fan Zhang <roy.fan.zhang@intel.com>]

This patch adds vhost_crypto sample application to DPDK.

Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
---
 examples/vhost_crypto/Makefile |  59 ++++
 examples/vhost_crypto/main.c   | 617 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 676 insertions(+)
 create mode 100644 examples/vhost_crypto/Makefile
 create mode 100644 examples/vhost_crypto/main.c

diff --git a/examples/vhost_crypto/Makefile b/examples/vhost_crypto/Makefile
new file mode 100644
index 0000000..e457524
--- /dev/null
+++ b/examples/vhost_crypto/Makefile
@@ -0,0 +1,59 @@
+#   BSD LICENSE
+#
+#   Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
+#   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.
+
+ifeq ($(RTE_SDK),)
+$(error "Please define RTE_SDK environment variable")
+endif
+
+# Default target, can be overridden by command line or environment
+RTE_TARGET ?= x86_64-native-linuxapp-gcc
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+ifneq ($(CONFIG_RTE_EXEC_ENV),"linuxapp")
+$(info This application can only operate in a linuxapp environment, \
+please change the definition of the RTE_TARGET environment variable)
+all:
+else
+
+# binary name
+APP = vhost-crypto
+
+# all source are stored in SRCS-y
+SRCS-y := main.c
+
+CFLAGS += -O2 -D_FILE_OFFSET_BITS=64
+CFLAGS += $(WERROR_FLAGS)
+CFLAGS += -D_GNU_SOURCE
+
+include $(RTE_SDK)/mk/rte.extapp.mk
+
+endif
diff --git a/examples/vhost_crypto/main.c b/examples/vhost_crypto/main.c
new file mode 100644
index 0000000..a67469d
--- /dev/null
+++ b/examples/vhost_crypto/main.c
@@ -0,0 +1,617 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *   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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <assert.h>
+#include <getopt.h>
+
+#include <rte_malloc.h>
+#include <rte_cycles.h>
+#include <rte_vhost.h>
+#include <rte_cryptodev.h>
+#include <rte_vhost_crypto.h>
+
+#define NB_VIRTIO_QUEUES	(1)
+#define MAX_PKT_BURST 			(64) /**< Max burst size for RX/TX */
+#define NB_MEMPOOL_OBJS			(1024)
+#define NB_CRYPTO_DESCRIPTORS		(1024)
+#define NB_CACHE_OBJS			(128)
+#define SESSION_MAP_ENTRIES		(1024) /**< Max nb sessions per vdev */
+
+#define MAX_NB_SOCKETS			(32)
+#define DEF_SOCKET_FILE			"/tmp/vhost_crypto1.socket"
+
+struct vhost_crypto_options {
+	char *socket_files[MAX_NB_SOCKETS];
+	uint32_t nb_sockets;
+	uint64_t cryptodev_mask;
+	int no_copy;
+} options;
+
+struct vhost_crypto_info {
+	int vids[MAX_NB_SOCKETS];
+	struct rte_mempool *sess_pool;
+	struct rte_mempool *cop_pool;
+	uint32_t lcore_id;
+	uint8_t cid;
+	volatile uint32_t initialized;
+} info;
+
+#define NO_COPY_KEYWORD		"no-copy"
+#define SOCKET_FILE_KEYWORD	"socket-file"
+#define CRYPTODEV_MASK_KEYWORD	"cryptodev-mask"
+
+/** support *SOCKET_FILE_PATH:CRYPTODEV_ID* format */
+static int
+parse_socket_arg(char *arg)
+{
+	uint32_t nb_sockets = options.nb_sockets;
+	size_t len = strlen(arg);
+
+	if (nb_sockets >= MAX_NB_SOCKETS) {
+		RTE_LOG(ERR, USER1, "Too many socket files!\n");
+		return -ENOMEM;
+	}
+
+	options.socket_files[nb_sockets] = rte_malloc(NULL, len, 0);
+	if (!options.socket_files[nb_sockets]) {
+		RTE_LOG(ERR, USER1, "Insufficient memory\n");
+		return -ENOMEM;
+	}
+
+	rte_memcpy(options.socket_files[nb_sockets], arg, len);
+
+	options.nb_sockets++;
+
+	return 0;
+}
+
+static int
+parse_cryptodev_mask(const char *q_arg)
+{
+	char *end = NULL;
+	uint64_t pm;
+
+	/* parse hexadecimal string */
+	pm = strtoul(q_arg, &end, 16);
+	if ((pm == '\0') || (end == NULL) || (*end != '\0'))
+		pm = 0;
+
+	options.cryptodev_mask = pm;
+	if (options.cryptodev_mask == 0 ||
+			__builtin_popcountll(options.cryptodev_mask) > 1) {
+		printf("invalid cryptodev-mask specified\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+static void
+vhost_crypto_usage(const char *prgname)
+{
+	printf("%s [EAL options] --\n"
+		"  --%s SOCKET-FILE-PATH\n"
+		"  --%s\n" /* no-copy */
+		"  --%s MASK: hexadecimal bitmask of crypto devices to configure\n",
+		prgname, SOCKET_FILE_KEYWORD, NO_COPY_KEYWORD,
+		CRYPTODEV_MASK_KEYWORD);
+}
+
+static int
+vhost_crypto_parse_args(int argc, char **argv)
+{
+	int opt, ret;
+	char *prgname = argv[0];
+	char **argvopt;
+	int option_index;
+	struct option lgopts[] = {
+			{SOCKET_FILE_KEYWORD, required_argument, 0, 0},
+			{CRYPTODEV_MASK_KEYWORD, required_argument, 0, 0},
+			{NO_COPY_KEYWORD, no_argument, 0, 0},
+			{NULL, 0, 0, 0}
+	};
+
+	argvopt = argv;
+
+	while ((opt = getopt_long(argc, argvopt, "s:",
+				  lgopts, &option_index)) != EOF) {
+
+		switch (opt) {
+		case 0:
+			if (strcmp(lgopts[option_index].name,
+					SOCKET_FILE_KEYWORD) == 0) {
+				ret = parse_socket_arg(optarg);
+				if (ret < 0) {
+					vhost_crypto_usage(prgname);
+					return ret;
+				}
+			} else if (strcmp(lgopts[option_index].name,
+					CRYPTODEV_MASK_KEYWORD) == 0) {
+				ret = parse_cryptodev_mask(optarg);
+				if (ret < 0) {
+					vhost_crypto_usage(prgname);
+					return ret;
+				}
+			} else if (strcmp(lgopts[option_index].name,
+					NO_COPY_KEYWORD) == 0)
+				options.no_copy = 1;
+			else {
+				vhost_crypto_usage(prgname);
+				return -EINVAL;
+			}
+			break;
+		default:
+			return -1;
+		}
+	}
+
+	if (options.nb_sockets == 0) {
+		options.socket_files[0] = strdup(DEF_SOCKET_FILE);
+		options.nb_sockets = 1;
+		RTE_LOG(INFO, USER1,
+				"VHOST-CRYPTO: use default socket file %s\n",
+				DEF_SOCKET_FILE);
+	}
+
+	if (options.cryptodev_mask == 0)
+		options.cryptodev_mask = (1 << options.nb_sockets) - 1;
+
+	return 0;
+}
+
+static int
+new_device(int vid)
+{
+	char path[PATH_MAX];
+	uint32_t i;
+	int ret;
+
+	ret = rte_vhost_get_ifname(vid, path, PATH_MAX);
+	if (ret) {
+		RTE_LOG(ERR, USER1, "Cannot find matched socket\n");
+		return ret;
+	}
+
+	ret = rte_vhost_crypto_create(vid, info.cid, info.sess_pool,
+			rte_lcore_to_socket_id(info.lcore_id));
+	if (ret) {
+		RTE_LOG(ERR, USER1, "Cannot create vhost crypto\n");
+		return ret;
+	}
+
+	for (i = 0; i < options.nb_sockets; i++) {
+		if (strcmp(path, options.socket_files[i]) == 0)
+			break;
+	}
+
+	if (i == options.nb_sockets) {
+		RTE_LOG(ERR, USER1, "Cannot find socket file from list\n");
+		return -1;
+	}
+
+	info.vids[i] = vid;
+
+	info.initialized = 1;
+
+	RTE_LOG(INFO, USER1, "New Vhost-crypto Device %s, Device ID %d\n", path,
+			vid);
+	return 0;
+}
+
+static void
+destroy_device(int vid)
+{
+	info.initialized = 0;
+
+	rte_vhost_crypto_free(vid);
+
+	rte_mempool_free(info.cop_pool);
+	rte_mempool_free(info.sess_pool);
+
+	RTE_LOG(INFO, USER1, "Vhost Crypto Device %i Removed\n", vid);
+}
+
+static const struct vhost_device_ops virtio_crypto_device_ops =
+{
+	.new_device =  new_device,
+	.destroy_device = destroy_device,
+};
+
+/*
+static void clrscr(void)
+{
+    system("@cls||clear");
+}
+*/
+static int
+vhost_crypto_stats_worker(__rte_unused void *arg)
+{
+	uint64_t t_start, t_end, hz = rte_get_tsc_hz();
+	struct rte_cryptodev_stats stats;
+	uint64_t threshold = hz;
+	double throughput;
+
+	RTE_LOG(INFO, USER1, "VHOST-CRYPTO: start stats lcore\n");
+
+	t_start = rte_rdtsc_precise();
+	while (1) {
+		uint64_t interval;
+		uint32_t timeout;
+
+		if (unlikely(info.initialized == 0))
+			continue;
+
+		t_end = rte_rdtsc_precise();
+		interval = t_end - t_start;
+		timeout = (interval > threshold) ? 1 : 0;
+		if (timeout)
+			t_start = t_end;
+
+		if (unlikely(timeout)) {
+			//clrscr();
+
+			rte_cryptodev_stats_get(info.cid, &stats);
+
+			if (unlikely(stats.enqueued_count + stats.dequeued_count
+					+ stats.enqueue_err_count +
+					stats.dequeue_err_count == 0))
+				continue;
+
+			throughput = ((double)stats.dequeued_count / interval)
+					* hz;
+
+			printf("%12s%12s%12s%12s%12s%12s\n", "cryptodevid",
+					"enq reqs", "deq reqs", "enq err",
+					"deq err", "ops/sec");
+			printf("%12u%12"PRIu64"%12"PRIu64"%12"PRIu64"%12"
+					PRIu64"%12.4f\n", info.cid,
+					stats.enqueued_count,
+					stats.dequeued_count,
+					stats.enqueue_err_count,
+					stats.dequeue_err_count, throughput);
+			rte_cryptodev_stats_reset(info.cid);
+		}
+	}
+
+	return 0;
+}
+
+static __rte_always_inline int
+enqueue_and_realloc_cops(uint16_t q_id, struct rte_crypto_op **ops,
+		uint16_t nb_ops)
+{
+	uint16_t enqd;
+
+	enqd = rte_cryptodev_enqueue_burst(info.cid, q_id, ops,
+			nb_ops);
+	if (unlikely(enqd < nb_ops)) {
+		RTE_LOG(ERR, USER1, "Cannot enqueue enough cops\n");
+		return -1;
+	}
+
+	if (unlikely(rte_crypto_op_bulk_alloc(info.cop_pool,
+			RTE_CRYPTO_OP_TYPE_SYMMETRIC, ops, enqd) < enqd)) {
+		RTE_LOG(ERR, USER1, "Failed to realloc cops\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+static __rte_always_inline int
+dequeue_and_free_cops(uint16_t q_id, struct rte_crypto_op **ops,
+		uint32_t *inflight)
+{
+	uint16_t nb_ops = *inflight < MAX_PKT_BURST ? *inflight : MAX_PKT_BURST;
+	uint64_t vid_mask;
+	uint16_t deqd;
+	uint8_t i;
+
+	deqd = rte_cryptodev_dequeue_burst(info.cid, q_id, ops, nb_ops);
+
+	if (!deqd)
+		return 0;
+
+	vid_mask = rte_vhost_crypto_finalize_requests(ops, deqd);
+
+	rte_mempool_put_bulk(info.cop_pool, (void **)ops, deqd);
+
+	for (i = 0; i < options.nb_sockets; i++) {
+		struct rte_vhost_vring vq;
+
+		if (unlikely(((1 << i) & vid_mask) == 0))
+			continue;
+
+		if (unlikely(rte_vhost_get_vhost_vring(info.vids[i], q_id, &vq)
+				< 0)) {
+			RTE_LOG(ERR, USER1, "Failed to get vring\n");
+			return -1;
+		}
+
+		if (unlikely(eventfd_write(vq.callfd, (eventfd_t)1) < 0)) {
+			RTE_LOG(ERR, USER1, "Failed to kick\n");
+			return -1;
+		}
+	}
+
+	*inflight -= nb_ops;
+
+	return 0;
+}
+
+static int
+vhost_crypto_worker(__rte_unused void *arg)
+{
+	struct rte_crypto_op *ops[NB_VIRTIO_QUEUES][MAX_PKT_BURST + 1];
+	struct rte_crypto_op *ops_deq[NB_VIRTIO_QUEUES][MAX_PKT_BURST + 1];
+	struct rte_cryptodev_qp_conf qp_conf = {NB_CRYPTO_DESCRIPTORS};
+	uint32_t nb_inflight_ops[NB_VIRTIO_QUEUES];
+	uint16_t fetched[NB_VIRTIO_QUEUES];
+	uint32_t lcore_id = rte_lcore_id();
+	int socket_id = rte_lcore_to_socket_id(lcore_id);
+	struct rte_cryptodev_config config = {socket_id, NB_VIRTIO_QUEUES};
+	uint64_t t_start, t_end, hz = rte_get_tsc_hz();
+	uint64_t threshold = hz / 100;
+	uint32_t i, j;
+	char name[128];
+	int ret = 0;
+
+	RTE_LOG(INFO, USER1, "Procesing on Core %u started\n", lcore_id);
+
+	ret =rte_cryptodev_configure(info.cid, &config);
+	if (ret < 0) {
+		RTE_LOG(ERR, USER1, "Failed to configure cryptodev %u",
+				info.cid);
+		goto exit;
+	}
+
+	snprintf(name, 127, "COPPOOL_%u", lcore_id);
+	info.cop_pool = rte_vhost_crypto_create_cop_pool(name,
+			RTE_CRYPTO_OP_TYPE_SYMMETRIC, NB_MEMPOOL_OBJS,
+			NB_CACHE_OBJS, socket_id);
+	if (!info.cop_pool) {
+		RTE_LOG(ERR, USER1, "Lcore %u failed to create crypto pool",
+				lcore_id);
+		ret = -1;
+		goto exit;
+	}
+
+	for (i = 0; i < NB_VIRTIO_QUEUES; i++) {
+		ret = rte_cryptodev_queue_pair_setup(info.cid, i, &qp_conf,
+				socket_id, info.sess_pool);
+		if (ret < 0) {
+			RTE_LOG(ERR, USER1, "Failed to configure qp %u\n",
+					info.cid);
+			goto exit;
+		}
+
+		if (rte_crypto_op_bulk_alloc(info.cop_pool,
+				RTE_CRYPTO_OP_TYPE_SYMMETRIC, ops[i],
+				MAX_PKT_BURST) < MAX_PKT_BURST) {
+			RTE_LOG(ERR, USER1, "Failed to alloc cops\n");
+			ret = -1;
+			goto exit;
+		}
+
+		fetched[i] = 0;
+		nb_inflight_ops[i] = 0;
+	}
+
+	t_start = rte_rdtsc_precise();
+	while (1) {
+		uint64_t interval;
+		uint32_t timeout;
+
+		if (unlikely(info.initialized == 0))
+			continue;
+
+		t_end = rte_rdtsc_precise();
+		interval = t_end - t_start;
+		timeout = (interval > threshold) ? 1 : 0;
+		if (timeout)
+			t_start = t_end;
+
+		if (unlikely(timeout)) {
+			for (j = 0; j < NB_VIRTIO_QUEUES; j++) {
+				if (unlikely(enqueue_and_realloc_cops(j,
+						ops[j], fetched[j]) < 0))
+					goto exit;
+
+				nb_inflight_ops[j] += fetched[j];
+				fetched[j] = 0;
+
+				if (unlikely(dequeue_and_free_cops(j,
+						ops_deq[j], &nb_inflight_ops[j])
+						< 0))
+					goto exit;
+			}
+		}
+
+		for (j = 0; j < NB_VIRTIO_QUEUES; j++) {
+			for (i = 0; i < options.nb_sockets; i++) {
+				uint16_t to_fetch = MAX_PKT_BURST -
+						fetched[j];
+				uint16_t available = NB_CACHE_OBJS -
+						nb_inflight_ops[j];
+
+				fetched[j] += rte_vhost_crypto_fetch_requests(
+					info.vids[i], j, &ops[j][fetched[j]],
+					RTE_MIN(to_fetch, available));
+
+				if (fetched[j] >= MAX_PKT_BURST) {
+					if (unlikely(enqueue_and_realloc_cops(j,
+							ops[j], fetched[j])
+							< 0))
+						goto exit;
+
+					nb_inflight_ops[j] += fetched[j];
+					fetched[j] = 0;
+				}
+			}
+
+			if (nb_inflight_ops[j] >= MAX_PKT_BURST) {
+				if (unlikely(dequeue_and_free_cops(j,
+						ops_deq[j],
+						&nb_inflight_ops[j]) < 0))
+					goto exit;
+			}
+		}
+	}
+exit:
+	rte_mempool_free(info.cop_pool);
+	rte_mempool_free(info.sess_pool);
+	return ret;
+}
+
+
+static void
+unregister_drivers(int socket_num)
+{
+	int ret;
+
+	ret = rte_vhost_driver_unregister(options.socket_files[socket_num]);
+	if (ret != 0)
+		RTE_LOG(ERR, USER1,
+			"Fail to unregister vhost driver for %s.\n",
+			options.socket_files[socket_num]);
+}
+
+int
+main(int argc, char *argv[])
+{
+	struct rte_cryptodev_info dev_info;
+	struct rte_mempool *sess_pool;
+	uint32_t cryptodev_id;
+	uint32_t worker_lcore;
+	uint32_t stats_lcore;
+	char name[128];
+	uint32_t i = 0;
+	int ret;
+
+	ret = rte_eal_init(argc, argv);
+	if (ret < 0)
+		return -1;
+	argc -= ret;
+	argv += ret;
+
+	ret = vhost_crypto_parse_args(argc, argv);
+	if (ret < 0) {
+		rte_exit(EXIT_FAILURE, "Failed to parse arguments!\n");
+	}
+
+	worker_lcore = rte_get_next_lcore(0, 1, 0);
+	stats_lcore = rte_get_next_lcore(worker_lcore, 1, 0);
+	if (worker_lcore == RTE_MAX_LCORE || stats_lcore == RTE_MAX_LCORE)
+		rte_exit(EXIT_FAILURE, "Not enough lcore\n");
+
+	for (cryptodev_id = 0; cryptodev_id < rte_cryptodev_count();
+			cryptodev_id++) {
+		uint64_t id = 1ULL << cryptodev_id;
+
+		if (id & options.cryptodev_mask)
+			break;
+	}
+
+	if (cryptodev_id == rte_cryptodev_count()) {
+		RTE_LOG(ERR, USER1, "Not enough Cryptodevs\n");
+		goto error_exit;
+	}
+
+	rte_cryptodev_info_get(cryptodev_id, &dev_info);
+	if (dev_info.max_nb_queue_pairs < NB_VIRTIO_QUEUES) {
+		RTE_LOG(ERR, USER1, "Number of queues cannot over %u",
+				dev_info.max_nb_queue_pairs);
+		goto error_exit;
+	}
+
+	snprintf(name, 127, "SESS_POOL_%u", worker_lcore);
+	sess_pool = rte_mempool_create(name, SESSION_MAP_ENTRIES,
+			rte_cryptodev_get_private_session_size(
+			cryptodev_id), 64, 0, NULL, NULL, NULL, NULL,
+			rte_lcore_to_socket_id(worker_lcore), 0);
+	if (!sess_pool) {
+		RTE_LOG(ERR, USER1, "Failed to create mempool");
+		goto error_exit;
+	}
+
+	info.cid = cryptodev_id;
+	info.sess_pool = sess_pool;
+	info.lcore_id = worker_lcore;
+
+	if (rte_eal_remote_launch(vhost_crypto_worker, NULL, worker_lcore)
+			< 0) {
+		RTE_LOG(ERR, USER1, "Failed to start worker lcore");
+		goto error_exit;
+	}
+	if (rte_eal_remote_launch(vhost_crypto_stats_worker, NULL, stats_lcore)
+			< 0) {
+		 {
+		RTE_LOG(ERR, USER1, "Failed to start stats lcore");
+		goto error_exit;
+	}
+	}
+
+	for (i = 0; i < options.nb_sockets; i++) {
+		if (rte_vhost_driver_register(options.socket_files[i], 0) < 0) {
+			RTE_LOG(ERR, USER1, "socket %s already exists\n",
+					options.socket_files[i]);
+			goto error_exit;
+		}
+
+		rte_vhost_driver_callback_register(options.socket_files[i],
+				&virtio_crypto_device_ops);
+
+		if (rte_vhost_driver_start(options.socket_files[i]) < 0) {
+			RTE_LOG(ERR, USER1, "failed to start vhost driver.\n");
+			goto error_exit;
+		}
+	}
+
+	RTE_LCORE_FOREACH(worker_lcore)
+		rte_eal_wait_lcore(worker_lcore);
+
+	return 0;
+
+error_exit:
+	for (i = 0; i < options.nb_sockets; i++)
+		unregister_drivers(i);
+
+	rte_mempool_free(info.sess_pool);
+
+	return -1;
+}
+
-- 
2.9.5