vhost: add device op when notification to guest is sent

[dpdk.git] / lib / librte_vhost / rte_vhost.h

diff --git a/lib/librte_vhost/rte_vhost.h b/lib/librte_vhost/rte_vhost.h
index 7fb1729..878e339 100644 (file)
--- a/lib/librte_vhost/rte_vhost.h
+++ b/lib/librte_vhost/rte_vhost.h
@@ -172,7 +172,15 @@ struct vhost_device_ops {
        int (*new_connection)(int vid);
        void (*destroy_connection)(int vid);
 
-       void *reserved[2]; /**< Reserved for future extension */
+       /**
+        * This callback gets called each time a guest gets notified
+        * about waiting packets. This is the interrupt handling trough
+        * the eventfd_write(callfd), which can be used for counting these
+        * "slow" syscalls.
+        */
+       void (*guest_notified)(int vid);
+
+       void *reserved[1]; /**< Reserved for future extension */
 };
 
 /**