vhost-user driver could be vhost-user net, yet it could be something else,
say, vhost-user SCSI.
-* ``rte_vhost_driver_session_start()``
-
- This function starts the vhost session loop to handle vhost messages. It
- starts an infinite loop, therefore it should be called in a dedicated
- thread.
-
* ``rte_vhost_driver_callback_register(path, vhost_device_ops)``
This function registers a set of callbacks, to let DPDK applications take
``VHOST_F_LOG_ALL`` will be set/cleared at the start/end of live
migration, respectively.
+* ``rte_vhost_driver_disable/enable_features(path, features))``
+
+ This function disables/enables some features. For example, it can be used to
+ disable mergeable buffers and TSO features, which both are enabled by
+ default.
+
+* ``rte_vhost_driver_start(path)``
+
+ This function triggers the vhost-user negotiation. It should be invoked at
+ the end of initializing a vhost-user driver.
+
* ``rte_vhost_enqueue_burst(vid, queue_id, pkts, count)``
Transmits (enqueues) ``count`` packets from host to guest.
Receives (dequeues) ``count`` packets from guest, and stored them at ``pkts``.
-* ``rte_vhost_driver_disable/enable_features(path, features))``
-
- This function disables/enables some features. For example, it can be used to
- disable mergeable buffers and TSO features, which both are enabled by
- default.
-
-
Vhost-user Implementations
--------------------------
static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
-static rte_atomic16_t nb_started_ports;
-static pthread_t session_th;
-
static struct rte_eth_link pmd_link = {
.link_speed = 10000,
.link_duplex = ETH_LINK_FULL_DUPLEX,
return vid;
}
-static void *
-vhost_driver_session(void *param __rte_unused)
-{
- /* start event handling */
- rte_vhost_driver_session_start();
-
- return NULL;
-}
-
-static int
-vhost_driver_session_start(void)
-{
- int ret;
-
- ret = pthread_create(&session_th,
- NULL, vhost_driver_session, NULL);
- if (ret)
- RTE_LOG(ERR, PMD, "Can't create a thread\n");
-
- return ret;
-}
-
-static void
-vhost_driver_session_stop(void)
-{
- int ret;
-
- ret = pthread_cancel(session_th);
- if (ret)
- RTE_LOG(ERR, PMD, "Can't cancel the thread\n");
-
- ret = pthread_join(session_th, NULL);
- if (ret)
- RTE_LOG(ERR, PMD, "Can't join the thread\n");
-}
-
static int
eth_dev_start(struct rte_eth_dev *dev)
{
goto error;
}
- /* We need only one message handling thread */
- if (rte_atomic16_add_return(&nb_started_ports, 1) == 1) {
- if (vhost_driver_session_start())
- goto error;
+ if (rte_vhost_driver_start(iface_name) < 0) {
+ RTE_LOG(ERR, PMD, "Failed to start driver for %s\n",
+ iface_name);
+ goto error;
}
return data->port_id;
eth_dev_close(eth_dev);
- if (rte_atomic16_sub_return(&nb_started_ports, 1) == 0)
- vhost_driver_session_stop();
-
rte_free(vring_states[eth_dev->data->port_id]);
vring_states[eth_dev->data->port_id] = NULL;
struct vhost_user_connection_list conn_list;
pthread_mutex_t conn_mutex;
char *path;
- int listenfd;
+ int socket_fd;
+ struct sockaddr_un un;
bool is_server;
bool reconnect;
bool dequeue_zero_copy;
static void vhost_user_server_new_connection(int fd, void *data, int *remove);
static void vhost_user_read_cb(int fd, void *dat, int *remove);
-static int vhost_user_create_client(struct vhost_user_socket *vsocket);
+static int create_unix_socket(struct vhost_user_socket *vsocket);
+static int vhost_user_start_client(struct vhost_user_socket *vsocket);
static struct vhost_user vhost_user = {
.fdset = {
free(conn);
- if (vsocket->reconnect)
- vhost_user_create_client(vsocket);
+ if (vsocket->reconnect) {
+ create_unix_socket(vsocket);
+ vhost_user_start_client(vsocket);
+ }
}
}
static int
-create_unix_socket(const char *path, struct sockaddr_un *un, bool is_server)
+create_unix_socket(struct vhost_user_socket *vsocket)
{
int fd;
+ struct sockaddr_un *un = &vsocket->un;
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",
- is_server ? "server" : "client", fd);
+ vsocket->is_server ? "server" : "client", fd);
- if (!is_server && fcntl(fd, F_SETFL, O_NONBLOCK)) {
+ if (!vsocket->is_server && fcntl(fd, F_SETFL, O_NONBLOCK)) {
RTE_LOG(ERR, VHOST_CONFIG,
"vhost-user: can't set nonblocking mode for socket, fd: "
"%d (%s)\n", fd, strerror(errno));
memset(un, 0, sizeof(*un));
un->sun_family = AF_UNIX;
- strncpy(un->sun_path, path, sizeof(un->sun_path));
+ strncpy(un->sun_path, vsocket->path, sizeof(un->sun_path));
un->sun_path[sizeof(un->sun_path) - 1] = '\0';
- return fd;
+ vsocket->socket_fd = fd;
+ return 0;
}
static int
-vhost_user_create_server(struct vhost_user_socket *vsocket)
+vhost_user_start_server(struct vhost_user_socket *vsocket)
{
- int fd;
int ret;
- struct sockaddr_un un;
+ int fd = vsocket->socket_fd;
const char *path = vsocket->path;
- fd = create_unix_socket(path, &un, vsocket->is_server);
- if (fd < 0)
- return -1;
-
- ret = bind(fd, (struct sockaddr *)&un, sizeof(un));
+ ret = bind(fd, (struct sockaddr *)&vsocket->un, sizeof(vsocket->un));
if (ret < 0) {
RTE_LOG(ERR, VHOST_CONFIG,
"failed to bind to %s: %s; remove it and try again\n",
if (ret < 0)
goto err;
- vsocket->listenfd = fd;
ret = fdset_add(&vhost_user.fdset, fd, vhost_user_server_new_connection,
NULL, vsocket);
if (ret < 0) {
}
static int
-vhost_user_create_client(struct vhost_user_socket *vsocket)
+vhost_user_start_client(struct vhost_user_socket *vsocket)
{
- int fd;
int ret;
- struct sockaddr_un un;
+ int fd = vsocket->socket_fd;
const char *path = vsocket->path;
struct vhost_user_reconnect *reconn;
- fd = create_unix_socket(path, &un, vsocket->is_server);
- if (fd < 0)
- return -1;
-
- ret = vhost_user_connect_nonblock(fd, (struct sockaddr *)&un,
- sizeof(un));
+ ret = vhost_user_connect_nonblock(fd, (struct sockaddr *)&vsocket->un,
+ sizeof(vsocket->un));
if (ret == 0) {
vhost_user_add_connection(fd, vsocket);
return 0;
close(fd);
return -1;
}
- reconn->un = un;
+ reconn->un = vsocket->un;
reconn->fd = fd;
reconn->vsocket = vsocket;
pthread_mutex_lock(&reconn_list.mutex);
goto out;
}
}
- ret = vhost_user_create_client(vsocket);
} else {
vsocket->is_server = true;
- ret = vhost_user_create_server(vsocket);
}
+ ret = create_unix_socket(vsocket);
if (ret < 0) {
free(vsocket->path);
free(vsocket);
if (!strcmp(vsocket->path, path)) {
if (vsocket->is_server) {
- fdset_del(&vhost_user.fdset, vsocket->listenfd);
- close(vsocket->listenfd);
+ fdset_del(&vhost_user.fdset, vsocket->socket_fd);
+ close(vsocket->socket_fd);
unlink(path);
} else if (vsocket->reconnect) {
vhost_user_remove_reconnect(vsocket);
}
int
-rte_vhost_driver_session_start(void)
+rte_vhost_driver_start(const char *path)
{
- fdset_event_dispatch(&vhost_user.fdset);
- return 0;
+ struct vhost_user_socket *vsocket;
+ static pthread_t fdset_tid;
+
+ pthread_mutex_lock(&vhost_user.mutex);
+ vsocket = find_vhost_user_socket(path);
+ pthread_mutex_unlock(&vhost_user.mutex);
+
+ if (!vsocket)
+ return -1;
+
+ if (fdset_tid == 0) {
+ int ret = pthread_create(&fdset_tid, NULL, fdset_event_dispatch,
+ &vhost_user.fdset);
+ if (ret < 0)
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "failed to create fdset handling thread");
+ }
+
+ if (vsocket->is_server)
+ return vhost_user_start_server(vsocket);
+ else
+ return vhost_user_start_client(vsocket);
}
git.droids-corp.org / dpdk.git / commitdiff