devices: vhost not reading packets from vring

[vpp.git] / src / vnet / devices / virtio / vhost_user.c

diff --git a/src/vnet/devices/virtio/vhost_user.c b/src/vnet/devices/virtio/vhost_user.c
index a18313b..c61828e 100644 (file)
--- a/src/vnet/devices/virtio/vhost_user.c
+++ b/src/vnet/devices/virtio/vhost_user.c
@@ -557,6 +557,24 @@ vhost_user_socket_read (clib_file_t * uf)
 
          vui->nregions++;
        }
+
+      /*
+       * Re-compute desc, used, and avail descriptor table if vring address
+       * is set.
+       */
+      for (q = 0; q < VHOST_VRING_MAX_N; q++)
+       {
+         if (vui->vrings[q].desc_user_addr &&
+             vui->vrings[q].used_user_addr && vui->vrings[q].avail_user_addr)
+           {
+             vui->vrings[q].desc =
+               map_user_mem (vui, vui->vrings[q].desc_user_addr);
+             vui->vrings[q].used =
+               map_user_mem (vui, vui->vrings[q].used_user_addr);
+             vui->vrings[q].avail =
+               map_user_mem (vui, vui->vrings[q].avail_user_addr);
+           }
+       }
       vlib_worker_thread_barrier_release (vm);
       break;
 
@@ -600,6 +618,10 @@ vhost_user_socket_read (clib_file_t * uf)
          goto close_socket;
        }
 
+      vui->vrings[msg.state.index].desc_user_addr = msg.addr.desc_user_addr;
+      vui->vrings[msg.state.index].used_user_addr = msg.addr.used_user_addr;
+      vui->vrings[msg.state.index].avail_user_addr = msg.addr.avail_user_addr;
+
       vlib_worker_thread_barrier_sync (vm);
       vui->vrings[msg.state.index].desc = desc;
       vui->vrings[msg.state.index].used = used;