nbd: add reference counting to NBDExport

We will use a similar two-phase destruction for NBDExport, so we need
each NBDClient to add a reference to NBDExport.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/qemu-nbd.c b/qemu-nbd.c
index 23392e0d3c..2a2cba3f73 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -586,7 +586,9 @@ int main(int argc, char **argv)
     } while (!sigterm_reported && (persistent || !nbd_started || nb_fds > 0));
 
     nbd_export_close(exp);
+    nbd_export_put(exp);
     bdrv_close(bs);
+
     if (sockpath) {
         unlink(sockpath);
     }