net/virtio-user: support server mode

[dpdk.git] / drivers / net / virtio / virtio_user / vhost_user.c

diff --git a/drivers/net/virtio/virtio_user/vhost_user.c b/drivers/net/virtio/virtio_user/vhost_user.c
index 91c6449..a6df97a 100644 (file)
--- a/drivers/net/virtio/virtio_user/vhost_user.c
+++ b/drivers/net/virtio/virtio_user/vhost_user.c
@@ -378,6 +378,30 @@ vhost_user_sock(struct virtio_user_dev *dev,
        return 0;
 }
 
+#define MAX_VIRTIO_USER_BACKLOG 1
+static int
+virtio_user_start_server(struct virtio_user_dev *dev, struct sockaddr_un *un)
+{
+       int ret;
+       int flag;
+       int fd = dev->listenfd;
+
+       ret = bind(fd, (struct sockaddr *)un, sizeof(*un));
+       if (ret < 0) {
+               PMD_DRV_LOG(ERR, "failed to bind to %s: %s; remove it and try again\n",
+                           dev->path, strerror(errno));
+               return -1;
+       }
+       ret = listen(fd, MAX_VIRTIO_USER_BACKLOG);
+       if (ret < 0)
+               return -1;
+
+       flag = fcntl(fd, F_GETFL);
+       fcntl(fd, F_SETFL, flag | O_NONBLOCK);
+
+       return 0;
+}
+
 /**
  * Set up environment to talk with a vhost user backend.
  *
@@ -405,13 +429,24 @@ vhost_user_setup(struct virtio_user_dev *dev)
        memset(&un, 0, sizeof(un));
        un.sun_family = AF_UNIX;
        snprintf(un.sun_path, sizeof(un.sun_path), "%s", dev->path);
-       if (connect(fd, (struct sockaddr *)&un, sizeof(un)) < 0) {
-               PMD_DRV_LOG(ERR, "connect error, %s", strerror(errno));
-               close(fd);
-               return -1;
+
+       if (dev->is_server) {
+               dev->listenfd = fd;
+               if (virtio_user_start_server(dev, &un) < 0) {
+                       PMD_DRV_LOG(ERR, "virtio-user startup fails in server mode");
+                       close(fd);
+                       return -1;
+               }
+               dev->vhostfd = -1;
+       } else {
+               if (connect(fd, (struct sockaddr *)&un, sizeof(un)) < 0) {
+                       PMD_DRV_LOG(ERR, "connect error, %s", strerror(errno));
+                       close(fd);
+                       return -1;
+               }
+               dev->vhostfd = fd;
        }
 
-       dev->vhostfd = fd;
        return 0;
 }