vhost-user: introduce shared vhost-user state

When multi queue is enabled e.g. for a virtio-net device,
each queue pair will have a vhost_dev, and the only thing
shared between vhost devs currently is the chardev. This
patch introduces a vhost-user state structure which will
be shared by all vhost devs of the same virtio device.

Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/hw/virtio/vhost-stub.c b/hw/virtio/vhost-stub.c
index 2d76cdebdc..049089b5e2 100644
--- a/hw/virtio/vhost-stub.c
+++ b/hw/virtio/vhost-stub.c
@@ -1,7 +1,17 @@
 #include "qemu/osdep.h"
 #include "hw/virtio/vhost.h"
+#include "hw/virtio/vhost-user.h"
 
 bool vhost_has_free_slot(void)
 {
     return true;
 }
+
+VhostUserState *vhost_user_init(void)
+{
+    return NULL;
+}
+
+void vhost_user_cleanup(VhostUserState *user)
+{
+}