X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_vhost%2Fsocket.c;h=73e1dca95e1d8685416a8ffdfe58d2bfdf7f1ca7;hb=b46a99c6006ab8edf098e4ac351d366336f6ac71;hp=6eec427e466401529f4be17b7c4fe40cd6d3907d;hpb=dec7b1884a555c941110526cc6cb9dfa08fd51b9;p=dpdk.git

diff --git a/lib/librte_vhost/socket.c b/lib/librte_vhost/socket.c
index 6eec427e46..73e1dca95e 100644
--- a/lib/librte_vhost/socket.c
+++ b/lib/librte_vhost/socket.c
@@ -40,6 +40,9 @@ struct vhost_user_socket {
 	bool dequeue_zero_copy;
 	bool iommu_support;
 	bool use_builtin_virtio_net;
+	bool extbuf;
+	bool linearbuf;
+	bool async_copy;
 
 	/*
 	 * The "supported_features" indicates the feature bits the
@@ -51,12 +54,9 @@ struct vhost_user_socket {
 	uint64_t supported_features;
 	uint64_t features;
 
-	/*
-	 * Device id to identify a specific backend device.
-	 * It's set to -1 for the default software implementation.
-	 * If valid, one socket can have 1 connection only.
-	 */
-	int vdpa_dev_id;
+	uint64_t protocol_features;
+
+	struct rte_vdpa_device *vdpa_dev;
 
 	struct vhost_device_ops const *notify_ops;
 };
@@ -88,24 +88,30 @@ static struct vhost_user vhost_user = {
 	.fdset = {
 		.fd = { [0 ... MAX_FDS - 1] = {-1, NULL, NULL, NULL, 0} },
 		.fd_mutex = PTHREAD_MUTEX_INITIALIZER,
+		.fd_pooling_mutex = PTHREAD_MUTEX_INITIALIZER,
 		.num = 0
 	},
 	.vsocket_cnt = 0,
 	.mutex = PTHREAD_MUTEX_INITIALIZER,
 };
 
-/* return bytes# of read on success or negative val on failure. */
+/*
+ * return bytes# of read on success or negative val on failure. Update fdnum
+ * with number of fds read.
+ */
 int
-read_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num)
+read_fd_message(int sockfd, char *buf, int buflen, int *fds, int max_fds,
+		int *fd_num)
 {
 	struct iovec iov;
 	struct msghdr msgh;
-	size_t fdsize = fd_num * sizeof(int);
-	char control[CMSG_SPACE(fdsize)];
+	char control[CMSG_SPACE(max_fds * sizeof(int))];
 	struct cmsghdr *cmsg;
 	int got_fds = 0;
 	int ret;
 
+	*fd_num = 0;
+
 	memset(&msgh, 0, sizeof(msgh));
 	iov.iov_base = buf;
 	iov.iov_len  = buflen;
@@ -117,12 +123,13 @@ read_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num)
 
 	ret = recvmsg(sockfd, &msgh, 0);
 	if (ret <= 0) {
-		RTE_LOG(ERR, VHOST_CONFIG, "recvmsg failed\n");
+		if (ret)
+			VHOST_LOG_CONFIG(ERR, "recvmsg failed\n");
 		return ret;
 	}
 
 	if (msgh.msg_flags & (MSG_TRUNC | MSG_CTRUNC)) {
-		RTE_LOG(ERR, VHOST_CONFIG, "truncted msg\n");
+		VHOST_LOG_CONFIG(ERR, "truncated msg\n");
 		return -1;
 	}
 
@@ -131,13 +138,14 @@ read_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num)
 		if ((cmsg->cmsg_level == SOL_SOCKET) &&
 			(cmsg->cmsg_type == SCM_RIGHTS)) {
 			got_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
+			*fd_num = got_fds;
 			memcpy(fds, CMSG_DATA(cmsg), got_fds * sizeof(int));
 			break;
 		}
 	}
 
 	/* Clear out unused file descriptors */
-	while (got_fds < fd_num)
+	while (got_fds < max_fds)
 		fds[got_fds++] = -1;
 
 	return ret;
@@ -166,7 +174,7 @@ send_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num)
 		msgh.msg_controllen = sizeof(control);
 		cmsg = CMSG_FIRSTHDR(&msgh);
 		if (cmsg == NULL) {
-			RTE_LOG(ERR, VHOST_CONFIG, "cmsg == NULL\n");
+			VHOST_LOG_CONFIG(ERR, "cmsg == NULL\n");
 			errno = EINVAL;
 			return -1;
 		}
@@ -184,7 +192,7 @@ send_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num)
 	} while (ret < 0 && errno == EINTR);
 
 	if (ret < 0) {
-		RTE_LOG(ERR, VHOST_CONFIG,  "sendmsg error\n");
+		VHOST_LOG_CONFIG(ERR,  "sendmsg error\n");
 		return ret;
 	}
 
@@ -198,6 +206,10 @@ vhost_user_add_connection(int fd, struct vhost_user_socket *vsocket)
 	size_t size;
 	struct vhost_user_connection *conn;
 	int ret;
+	struct virtio_net *dev;
+
+	if (vsocket == NULL)
+		return;
 
 	conn = malloc(sizeof(*conn));
 	if (conn == NULL) {
@@ -215,20 +227,33 @@ vhost_user_add_connection(int fd, struct vhost_user_socket *vsocket)
 
 	vhost_set_builtin_virtio_net(vid, vsocket->use_builtin_virtio_net);
 
-	vhost_attach_vdpa_device(vid, vsocket->vdpa_dev_id);
+	vhost_attach_vdpa_device(vid, vsocket->vdpa_dev);
 
 	if (vsocket->dequeue_zero_copy)
 		vhost_enable_dequeue_zero_copy(vid);
 
-	RTE_LOG(INFO, VHOST_CONFIG, "new device, handle is %d\n", vid);
+	if (vsocket->extbuf)
+		vhost_enable_extbuf(vid);
+
+	if (vsocket->linearbuf)
+		vhost_enable_linearbuf(vid);
+
+	if (vsocket->async_copy) {
+		dev = get_device(vid);
+
+		if (dev)
+			dev->async_copy = 1;
+	}
+
+	VHOST_LOG_CONFIG(INFO, "new device, handle is %d\n", vid);
 
 	if (vsocket->notify_ops->new_connection) {
 		ret = vsocket->notify_ops->new_connection(vid);
 		if (ret < 0) {
-			RTE_LOG(ERR, VHOST_CONFIG,
+			VHOST_LOG_CONFIG(ERR,
 				"failed to add vhost user connection with fd %d\n",
 				fd);
-			goto err;
+			goto err_cleanup;
 		}
 	}
 
@@ -238,14 +263,14 @@ vhost_user_add_connection(int fd, struct vhost_user_socket *vsocket)
 	ret = fdset_add(&vhost_user.fdset, fd, vhost_user_read_cb,
 			NULL, conn);
 	if (ret < 0) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 			"failed to add fd %d into vhost server fdset\n",
 			fd);
 
 		if (vsocket->notify_ops->destroy_connection)
 			vsocket->notify_ops->destroy_connection(conn->vid);
 
-		goto err;
+		goto err_cleanup;
 	}
 
 	pthread_mutex_lock(&vsocket->conn_mutex);
@@ -255,6 +280,8 @@ vhost_user_add_connection(int fd, struct vhost_user_socket *vsocket)
 	fdset_pipe_notify(&vhost_user.fdset);
 	return;
 
+err_cleanup:
+	vhost_destroy_device(vid);
 err:
 	free(conn);
 	close(fd);
@@ -270,7 +297,7 @@ vhost_user_server_new_connection(int fd, void *dat, int *remove __rte_unused)
 	if (fd < 0)
 		return;
 
-	RTE_LOG(INFO, VHOST_CONFIG, "new vhost user connection is %d\n", fd);
+	VHOST_LOG_CONFIG(INFO, "new vhost user connection is %d\n", fd);
 	vhost_user_add_connection(fd, vsocket);
 }
 
@@ -283,23 +310,29 @@ vhost_user_read_cb(int connfd, void *dat, int *remove)
 
 	ret = vhost_user_msg_handler(conn->vid, connfd);
 	if (ret < 0) {
+		struct virtio_net *dev = get_device(conn->vid);
+
 		close(connfd);
 		*remove = 1;
-		vhost_destroy_device(conn->vid);
+
+		if (dev)
+			vhost_destroy_device_notify(dev);
 
 		if (vsocket->notify_ops->destroy_connection)
 			vsocket->notify_ops->destroy_connection(conn->vid);
 
-		pthread_mutex_lock(&vsocket->conn_mutex);
-		TAILQ_REMOVE(&vsocket->conn_list, conn, next);
-		pthread_mutex_unlock(&vsocket->conn_mutex);
-
-		free(conn);
+		vhost_destroy_device(conn->vid);
 
 		if (vsocket->reconnect) {
 			create_unix_socket(vsocket);
 			vhost_user_start_client(vsocket);
 		}
+
+		pthread_mutex_lock(&vsocket->conn_mutex);
+		TAILQ_REMOVE(&vsocket->conn_list, conn, next);
+		pthread_mutex_unlock(&vsocket->conn_mutex);
+
+		free(conn);
 	}
 }
 
@@ -312,11 +345,11 @@ create_unix_socket(struct vhost_user_socket *vsocket)
 	fd = socket(AF_UNIX, SOCK_STREAM, 0);
 	if (fd < 0)
 		return -1;
-	RTE_LOG(INFO, VHOST_CONFIG, "vhost-user %s: socket created, fd: %d\n",
+	VHOST_LOG_CONFIG(INFO, "vhost-user %s: socket created, fd: %d\n",
 		vsocket->is_server ? "server" : "client", fd);
 
 	if (!vsocket->is_server && fcntl(fd, F_SETFL, O_NONBLOCK)) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 			"vhost-user: can't set nonblocking mode for socket, fd: "
 			"%d (%s)\n", fd, strerror(errno));
 		close(fd);
@@ -351,12 +384,12 @@ vhost_user_start_server(struct vhost_user_socket *vsocket)
 	 */
 	ret = bind(fd, (struct sockaddr *)&vsocket->un, sizeof(vsocket->un));
 	if (ret < 0) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 			"failed to bind to %s: %s; remove it and try again\n",
 			path, strerror(errno));
 		goto err;
 	}
-	RTE_LOG(INFO, VHOST_CONFIG, "bind to %s\n", path);
+	VHOST_LOG_CONFIG(INFO, "bind to %s\n", path);
 
 	ret = listen(fd, MAX_VIRTIO_BACKLOG);
 	if (ret < 0)
@@ -365,7 +398,7 @@ vhost_user_start_server(struct vhost_user_socket *vsocket)
 	ret = fdset_add(&vhost_user.fdset, fd, vhost_user_server_new_connection,
 		  NULL, vsocket);
 	if (ret < 0) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 			"failed to add listen fd %d to vhost server fdset\n",
 			fd);
 		goto err;
@@ -406,12 +439,12 @@ vhost_user_connect_nonblock(int fd, struct sockaddr *un, size_t sz)
 
 	flags = fcntl(fd, F_GETFL, 0);
 	if (flags < 0) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 			"can't get flags for connfd %d\n", fd);
 		return -2;
 	}
 	if ((flags & O_NONBLOCK) && fcntl(fd, F_SETFL, flags & ~O_NONBLOCK)) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 				"can't disable nonblocking on fd %d\n", fd);
 		return -2;
 	}
@@ -440,7 +473,7 @@ vhost_user_client_reconnect(void *arg __rte_unused)
 						sizeof(reconn->un));
 			if (ret == -2) {
 				close(reconn->fd);
-				RTE_LOG(ERR, VHOST_CONFIG,
+				VHOST_LOG_CONFIG(ERR,
 					"reconnection for fd %d failed\n",
 					reconn->fd);
 				goto remove_fd;
@@ -448,7 +481,7 @@ vhost_user_client_reconnect(void *arg __rte_unused)
 			if (ret == -1)
 				continue;
 
-			RTE_LOG(INFO, VHOST_CONFIG,
+			VHOST_LOG_CONFIG(INFO,
 				"%s: connected\n", reconn->vsocket->path);
 			vhost_user_add_connection(reconn->fd, reconn->vsocket);
 remove_fd:
@@ -467,31 +500,22 @@ static int
 vhost_user_reconnect_init(void)
 {
 	int ret;
-	char thread_name[RTE_MAX_THREAD_NAME_LEN];
 
 	ret = pthread_mutex_init(&reconn_list.mutex, NULL);
 	if (ret < 0) {
-		RTE_LOG(ERR, VHOST_CONFIG, "failed to initialize mutex");
+		VHOST_LOG_CONFIG(ERR, "failed to initialize mutex");
 		return ret;
 	}
 	TAILQ_INIT(&reconn_list.head);
 
-	ret = pthread_create(&reconn_tid, NULL,
+	ret = rte_ctrl_thread_create(&reconn_tid, "vhost_reconn", NULL,
 			     vhost_user_client_reconnect, NULL);
 	if (ret != 0) {
-		RTE_LOG(ERR, VHOST_CONFIG, "failed to create reconnect thread");
+		VHOST_LOG_CONFIG(ERR, "failed to create reconnect thread");
 		if (pthread_mutex_destroy(&reconn_list.mutex)) {
-			RTE_LOG(ERR, VHOST_CONFIG,
+			VHOST_LOG_CONFIG(ERR,
 				"failed to destroy reconnect mutex");
 		}
-	} else {
-		snprintf(thread_name, sizeof(thread_name),
-			 "vhost-reconn");
-
-		if (rte_thread_setname(reconn_tid, thread_name)) {
-			RTE_LOG(DEBUG, VHOST_CONFIG,
-				"failed to set reconnect thread name");
-		}
 	}
 
 	return ret;
@@ -512,7 +536,7 @@ vhost_user_start_client(struct vhost_user_socket *vsocket)
 		return 0;
 	}
 
-	RTE_LOG(WARNING, VHOST_CONFIG,
+	VHOST_LOG_CONFIG(WARNING,
 		"failed to connect to %s: %s\n",
 		path, strerror(errno));
 
@@ -521,10 +545,10 @@ vhost_user_start_client(struct vhost_user_socket *vsocket)
 		return -1;
 	}
 
-	RTE_LOG(INFO, VHOST_CONFIG, "%s: reconnecting...\n", path);
+	VHOST_LOG_CONFIG(INFO, "%s: reconnecting...\n", path);
 	reconn = malloc(sizeof(*reconn));
 	if (reconn == NULL) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 			"failed to allocate memory for reconnect\n");
 		close(fd);
 		return -1;
@@ -544,6 +568,9 @@ find_vhost_user_socket(const char *path)
 {
 	int i;
 
+	if (path == NULL)
+		return NULL;
+
 	for (i = 0; i < vhost_user.vsocket_cnt; i++) {
 		struct vhost_user_socket *vsocket = vhost_user.vsockets[i];
 
@@ -555,17 +582,18 @@ find_vhost_user_socket(const char *path)
 }
 
 int
-rte_vhost_driver_attach_vdpa_device(const char *path, int did)
+rte_vhost_driver_attach_vdpa_device(const char *path,
+		struct rte_vdpa_device *dev)
 {
 	struct vhost_user_socket *vsocket;
 
-	if (rte_vdpa_get_device(did) == NULL)
+	if (dev == NULL || path == NULL)
 		return -1;
 
 	pthread_mutex_lock(&vhost_user.mutex);
 	vsocket = find_vhost_user_socket(path);
 	if (vsocket)
-		vsocket->vdpa_dev_id = did;
+		vsocket->vdpa_dev = dev;
 	pthread_mutex_unlock(&vhost_user.mutex);
 
 	return vsocket ? 0 : -1;
@@ -579,25 +607,25 @@ rte_vhost_driver_detach_vdpa_device(const char *path)
 	pthread_mutex_lock(&vhost_user.mutex);
 	vsocket = find_vhost_user_socket(path);
 	if (vsocket)
-		vsocket->vdpa_dev_id = -1;
+		vsocket->vdpa_dev = NULL;
 	pthread_mutex_unlock(&vhost_user.mutex);
 
 	return vsocket ? 0 : -1;
 }
 
-int
-rte_vhost_driver_get_vdpa_device_id(const char *path)
+struct rte_vdpa_device *
+rte_vhost_driver_get_vdpa_device(const char *path)
 {
 	struct vhost_user_socket *vsocket;
-	int did = -1;
+	struct rte_vdpa_device *dev = NULL;
 
 	pthread_mutex_lock(&vhost_user.mutex);
 	vsocket = find_vhost_user_socket(path);
 	if (vsocket)
-		did = vsocket->vdpa_dev_id;
+		dev = vsocket->vdpa_dev;
 	pthread_mutex_unlock(&vhost_user.mutex);
 
-	return did;
+	return dev;
 }
 
 int
@@ -670,27 +698,25 @@ rte_vhost_driver_get_features(const char *path, uint64_t *features)
 	struct vhost_user_socket *vsocket;
 	uint64_t vdpa_features;
 	struct rte_vdpa_device *vdpa_dev;
-	int did = -1;
 	int ret = 0;
 
 	pthread_mutex_lock(&vhost_user.mutex);
 	vsocket = find_vhost_user_socket(path);
 	if (!vsocket) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 			"socket file %s is not registered yet.\n", path);
 		ret = -1;
 		goto unlock_exit;
 	}
 
-	did = vsocket->vdpa_dev_id;
-	vdpa_dev = rte_vdpa_get_device(did);
-	if (!vdpa_dev || !vdpa_dev->ops->get_features) {
+	vdpa_dev = vsocket->vdpa_dev;
+	if (!vdpa_dev) {
 		*features = vsocket->features;
 		goto unlock_exit;
 	}
 
-	if (vdpa_dev->ops->get_features(did, &vdpa_features) < 0) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+	if (vdpa_dev->ops->get_features(vdpa_dev, &vdpa_features) < 0) {
+		VHOST_LOG_CONFIG(ERR,
 				"failed to get vdpa features "
 				"for socket file %s.\n", path);
 		ret = -1;
@@ -704,6 +730,20 @@ unlock_exit:
 	return ret;
 }
 
+int
+rte_vhost_driver_set_protocol_features(const char *path,
+		uint64_t protocol_features)
+{
+	struct vhost_user_socket *vsocket;
+
+	pthread_mutex_lock(&vhost_user.mutex);
+	vsocket = find_vhost_user_socket(path);
+	if (vsocket)
+		vsocket->protocol_features = protocol_features;
+	pthread_mutex_unlock(&vhost_user.mutex);
+	return vsocket ? 0 : -1;
+}
+
 int
 rte_vhost_driver_get_protocol_features(const char *path,
 		uint64_t *protocol_features)
@@ -711,35 +751,33 @@ rte_vhost_driver_get_protocol_features(const char *path,
 	struct vhost_user_socket *vsocket;
 	uint64_t vdpa_protocol_features;
 	struct rte_vdpa_device *vdpa_dev;
-	int did = -1;
 	int ret = 0;
 
 	pthread_mutex_lock(&vhost_user.mutex);
 	vsocket = find_vhost_user_socket(path);
 	if (!vsocket) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 			"socket file %s is not registered yet.\n", path);
 		ret = -1;
 		goto unlock_exit;
 	}
 
-	did = vsocket->vdpa_dev_id;
-	vdpa_dev = rte_vdpa_get_device(did);
-	if (!vdpa_dev || !vdpa_dev->ops->get_protocol_features) {
-		*protocol_features = VHOST_USER_PROTOCOL_FEATURES;
+	vdpa_dev = vsocket->vdpa_dev;
+	if (!vdpa_dev) {
+		*protocol_features = vsocket->protocol_features;
 		goto unlock_exit;
 	}
 
-	if (vdpa_dev->ops->get_protocol_features(did,
+	if (vdpa_dev->ops->get_protocol_features(vdpa_dev,
 				&vdpa_protocol_features) < 0) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 				"failed to get vdpa protocol features "
 				"for socket file %s.\n", path);
 		ret = -1;
 		goto unlock_exit;
 	}
 
-	*protocol_features = VHOST_USER_PROTOCOL_FEATURES
+	*protocol_features = vsocket->protocol_features
 		& vdpa_protocol_features;
 
 unlock_exit:
@@ -753,27 +791,25 @@ rte_vhost_driver_get_queue_num(const char *path, uint32_t *queue_num)
 	struct vhost_user_socket *vsocket;
 	uint32_t vdpa_queue_num;
 	struct rte_vdpa_device *vdpa_dev;
-	int did = -1;
 	int ret = 0;
 
 	pthread_mutex_lock(&vhost_user.mutex);
 	vsocket = find_vhost_user_socket(path);
 	if (!vsocket) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 			"socket file %s is not registered yet.\n", path);
 		ret = -1;
 		goto unlock_exit;
 	}
 
-	did = vsocket->vdpa_dev_id;
-	vdpa_dev = rte_vdpa_get_device(did);
-	if (!vdpa_dev || !vdpa_dev->ops->get_queue_num) {
+	vdpa_dev = vsocket->vdpa_dev;
+	if (!vdpa_dev) {
 		*queue_num = VHOST_MAX_QUEUE_PAIRS;
 		goto unlock_exit;
 	}
 
-	if (vdpa_dev->ops->get_queue_num(did, &vdpa_queue_num) < 0) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+	if (vdpa_dev->ops->get_queue_num(vdpa_dev, &vdpa_queue_num) < 0) {
+		VHOST_LOG_CONFIG(ERR,
 				"failed to get vdpa queue number "
 				"for socket file %s.\n", path);
 		ret = -1;
@@ -787,6 +823,20 @@ unlock_exit:
 	return ret;
 }
 
+static void
+vhost_user_socket_mem_free(struct vhost_user_socket *vsocket)
+{
+	if (vsocket && vsocket->path) {
+		free(vsocket->path);
+		vsocket->path = NULL;
+	}
+
+	if (vsocket) {
+		free(vsocket);
+		vsocket = NULL;
+	}
+}
+
 /*
  * Register a new vhost-user socket; here we could act as server
  * (the default case), or client (when RTE_VHOST_USER_CLIENT) flag
@@ -804,7 +854,7 @@ rte_vhost_driver_register(const char *path, uint64_t flags)
 	pthread_mutex_lock(&vhost_user.mutex);
 
 	if (vhost_user.vsocket_cnt == MAX_VHOST_SOCKET) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 			"error: the number of vhost sockets reaches maximum\n");
 		goto out;
 	}
@@ -815,19 +865,41 @@ rte_vhost_driver_register(const char *path, uint64_t flags)
 	memset(vsocket, 0, sizeof(struct vhost_user_socket));
 	vsocket->path = strdup(path);
 	if (vsocket->path == NULL) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 			"error: failed to copy socket path string\n");
-		free(vsocket);
+		vhost_user_socket_mem_free(vsocket);
 		goto out;
 	}
 	TAILQ_INIT(&vsocket->conn_list);
 	ret = pthread_mutex_init(&vsocket->conn_mutex, NULL);
 	if (ret) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 			"error: failed to init connection mutex\n");
 		goto out_free;
 	}
+	vsocket->vdpa_dev = NULL;
 	vsocket->dequeue_zero_copy = flags & RTE_VHOST_USER_DEQUEUE_ZERO_COPY;
+	vsocket->extbuf = flags & RTE_VHOST_USER_EXTBUF_SUPPORT;
+	vsocket->linearbuf = flags & RTE_VHOST_USER_LINEARBUF_SUPPORT;
+
+	if (vsocket->dequeue_zero_copy &&
+	    (flags & RTE_VHOST_USER_IOMMU_SUPPORT)) {
+		VHOST_LOG_CONFIG(ERR,
+			"error: enabling dequeue zero copy and IOMMU features "
+			"simultaneously is not supported\n");
+		goto out_mutex;
+	}
+
+	vsocket->async_copy = flags & RTE_VHOST_USER_ASYNC_COPY;
+
+	if (vsocket->async_copy &&
+		(flags & (RTE_VHOST_USER_IOMMU_SUPPORT |
+		RTE_VHOST_USER_POSTCOPY_SUPPORT))) {
+		VHOST_LOG_CONFIG(ERR, "error: enabling async copy and IOMMU "
+			"or post-copy feature simultaneously is not "
+			"supported\n");
+		goto out_mutex;
+	}
 
 	/*
 	 * Set the supported features correctly for the builtin vhost-user
@@ -844,12 +916,83 @@ rte_vhost_driver_register(const char *path, uint64_t flags)
 	vsocket->use_builtin_virtio_net = true;
 	vsocket->supported_features = VIRTIO_NET_SUPPORTED_FEATURES;
 	vsocket->features           = VIRTIO_NET_SUPPORTED_FEATURES;
+	vsocket->protocol_features  = VHOST_USER_PROTOCOL_FEATURES;
+
+	/*
+	 * Dequeue zero copy can't assure descriptors returned in order.
+	 * Also, it requires that the guest memory is populated, which is
+	 * not compatible with postcopy.
+	 */
+	if (vsocket->dequeue_zero_copy) {
+		if (vsocket->extbuf) {
+			VHOST_LOG_CONFIG(ERR,
+			"error: zero copy is incompatible with external buffers\n");
+			ret = -1;
+			goto out_mutex;
+		}
+		if (vsocket->linearbuf) {
+			VHOST_LOG_CONFIG(ERR,
+			"error: zero copy is incompatible with linear buffers\n");
+			ret = -1;
+			goto out_mutex;
+		}
+		if ((flags & RTE_VHOST_USER_CLIENT) != 0) {
+			VHOST_LOG_CONFIG(ERR,
+			"error: zero copy is incompatible with vhost client mode\n");
+			ret = -1;
+			goto out_mutex;
+		}
+		vsocket->supported_features &= ~(1ULL << VIRTIO_F_IN_ORDER);
+		vsocket->features &= ~(1ULL << VIRTIO_F_IN_ORDER);
+
+		VHOST_LOG_CONFIG(INFO,
+			"Dequeue zero copy requested, disabling postcopy support\n");
+		vsocket->protocol_features &=
+			~(1ULL << VHOST_USER_PROTOCOL_F_PAGEFAULT);
+	}
+
+	if (vsocket->async_copy) {
+		vsocket->supported_features &= ~(1ULL << VHOST_F_LOG_ALL);
+		vsocket->features &= ~(1ULL << VHOST_F_LOG_ALL);
+		VHOST_LOG_CONFIG(INFO,
+			"Logging feature is disabled in async copy mode\n");
+	}
+
+	/*
+	 * We'll not be able to receive a buffer from guest in linear mode
+	 * without external buffer if it will not fit in a single mbuf, which is
+	 * likely if segmentation offloading enabled.
+	 */
+	if (vsocket->linearbuf && !vsocket->extbuf) {
+		uint64_t seg_offload_features =
+				(1ULL << VIRTIO_NET_F_HOST_TSO4) |
+				(1ULL << VIRTIO_NET_F_HOST_TSO6) |
+				(1ULL << VIRTIO_NET_F_HOST_UFO);
+
+		VHOST_LOG_CONFIG(INFO,
+			"Linear buffers requested without external buffers, "
+			"disabling host segmentation offloading support\n");
+		vsocket->supported_features &= ~seg_offload_features;
+		vsocket->features &= ~seg_offload_features;
+	}
 
 	if (!(flags & RTE_VHOST_USER_IOMMU_SUPPORT)) {
 		vsocket->supported_features &= ~(1ULL << VIRTIO_F_IOMMU_PLATFORM);
 		vsocket->features &= ~(1ULL << VIRTIO_F_IOMMU_PLATFORM);
 	}
 
+	if (!(flags & RTE_VHOST_USER_POSTCOPY_SUPPORT)) {
+		vsocket->protocol_features &=
+			~(1ULL << VHOST_USER_PROTOCOL_F_PAGEFAULT);
+	} else {
+#ifndef RTE_LIBRTE_VHOST_POSTCOPY
+		VHOST_LOG_CONFIG(ERR,
+			"Postcopy requested but not compiled\n");
+		ret = -1;
+		goto out_mutex;
+#endif
+	}
+
 	if ((flags & RTE_VHOST_USER_CLIENT) != 0) {
 		vsocket->reconnect = !(flags & RTE_VHOST_USER_NO_RECONNECT);
 		if (vsocket->reconnect && reconn_tid == 0) {
@@ -871,12 +1014,11 @@ rte_vhost_driver_register(const char *path, uint64_t flags)
 
 out_mutex:
 	if (pthread_mutex_destroy(&vsocket->conn_mutex)) {
-		RTE_LOG(ERR, VHOST_CONFIG,
+		VHOST_LOG_CONFIG(ERR,
 			"error: failed to destroy connection mutex\n");
 	}
 out_free:
-	free(vsocket->path);
-	free(vsocket);
+	vhost_user_socket_mem_free(vsocket);
 out:
 	pthread_mutex_unlock(&vhost_user.mutex);
 
@@ -917,28 +1059,37 @@ rte_vhost_driver_unregister(const char *path)
 	int count;
 	struct vhost_user_connection *conn, *next;
 
+	if (path == NULL)
+		return -1;
+
+again:
 	pthread_mutex_lock(&vhost_user.mutex);
 
 	for (i = 0; i < vhost_user.vsocket_cnt; i++) {
 		struct vhost_user_socket *vsocket = vhost_user.vsockets[i];
 
 		if (!strcmp(vsocket->path, path)) {
-			if (vsocket->is_server) {
-				fdset_del(&vhost_user.fdset, vsocket->socket_fd);
-				close(vsocket->socket_fd);
-				unlink(path);
-			} else if (vsocket->reconnect) {
-				vhost_user_remove_reconnect(vsocket);
-			}
-
 			pthread_mutex_lock(&vsocket->conn_mutex);
 			for (conn = TAILQ_FIRST(&vsocket->conn_list);
 			     conn != NULL;
 			     conn = next) {
 				next = TAILQ_NEXT(conn, next);
 
-				fdset_del(&vhost_user.fdset, conn->connfd);
-				RTE_LOG(INFO, VHOST_CONFIG,
+				/*
+				 * If r/wcb is executing, release vsocket's
+				 * conn_mutex and vhost_user's mutex locks, and
+				 * try again since the r/wcb may use the
+				 * conn_mutex and mutex locks.
+				 */
+				if (fdset_try_del(&vhost_user.fdset,
+						  conn->connfd) == -1) {
+					pthread_mutex_unlock(
+							&vsocket->conn_mutex);
+					pthread_mutex_unlock(&vhost_user.mutex);
+					goto again;
+				}
+
+				VHOST_LOG_CONFIG(INFO,
 					"free connfd = %d for device '%s'\n",
 					conn->connfd, path);
 				close(conn->connfd);
@@ -948,9 +1099,26 @@ rte_vhost_driver_unregister(const char *path)
 			}
 			pthread_mutex_unlock(&vsocket->conn_mutex);
 
+			if (vsocket->is_server) {
+				/*
+				 * If r/wcb is executing, release vhost_user's
+				 * mutex lock, and try again since the r/wcb
+				 * may use the mutex lock.
+				 */
+				if (fdset_try_del(&vhost_user.fdset,
+						vsocket->socket_fd) == -1) {
+					pthread_mutex_unlock(&vhost_user.mutex);
+					goto again;
+				}
+
+				close(vsocket->socket_fd);
+				unlink(path);
+			} else if (vsocket->reconnect) {
+				vhost_user_remove_reconnect(vsocket);
+			}
+
 			pthread_mutex_destroy(&vsocket->conn_mutex);
-			free(vsocket->path);
-			free(vsocket);
+			vhost_user_socket_mem_free(vsocket);
 
 			count = --vhost_user.vsocket_cnt;
 			vhost_user.vsockets[i] = vhost_user.vsockets[count];
@@ -1000,7 +1168,6 @@ rte_vhost_driver_start(const char *path)
 {
 	struct vhost_user_socket *vsocket;
 	static pthread_t fdset_tid;
-	char thread_name[RTE_MAX_THREAD_NAME_LEN];
 
 	pthread_mutex_lock(&vhost_user.mutex);
 	vsocket = find_vhost_user_socket(path);
@@ -1015,27 +1182,20 @@ rte_vhost_driver_start(const char *path)
 		 * rebuild the wait list of poll.
 		 */
 		if (fdset_pipe_init(&vhost_user.fdset) < 0) {
-			RTE_LOG(ERR, VHOST_CONFIG,
+			VHOST_LOG_CONFIG(ERR,
 				"failed to create pipe for vhost fdset\n");
 			return -1;
 		}
 
-		int ret = pthread_create(&fdset_tid, NULL, fdset_event_dispatch,
-				     &vhost_user.fdset);
+		int ret = rte_ctrl_thread_create(&fdset_tid,
+			"vhost-events", NULL, fdset_event_dispatch,
+			&vhost_user.fdset);
 		if (ret != 0) {
-			RTE_LOG(ERR, VHOST_CONFIG,
+			VHOST_LOG_CONFIG(ERR,
 				"failed to create fdset handling thread");
 
 			fdset_pipe_uninit(&vhost_user.fdset);
 			return -1;
-		} else {
-			snprintf(thread_name, sizeof(thread_name),
-				 "vhost-events");
-
-			if (rte_thread_setname(fdset_tid, thread_name)) {
-				RTE_LOG(DEBUG, VHOST_CONFIG,
-					"failed to set vhost-event thread name");
-			}
 		}
 	}