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/nbd.h b/nbd.h
index 8b84a50ed4..86921cd048 100644
--- a/nbd.h
+++ b/nbd.h
@@ -81,6 +81,8 @@ typedef struct NBDClient NBDClient;
 NBDExport *nbd_export_new(BlockDriverState *bs, off_t dev_offset,
                           off_t size, uint32_t nbdflags);
 void nbd_export_close(NBDExport *exp);
+void nbd_export_get(NBDExport *exp);
+void nbd_export_put(NBDExport *exp);
 
 NBDClient *nbd_client_new(NBDExport *exp, int csock,
                           void (*close)(NBDClient *));