dpif: Generalize test for dummy dpifs beyond the name.

When --enable-dummy=system or --enable-dummy=override is in use, dpifs
other than "dummy" are actually dummy dpifs, so use a more reliable test.

Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Alex Wang <alexw@nicira.com>

3 files changed, 14 insertions, 5 deletions

diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c
index 5b82c8b63..d306f776a 100644
--- a/lib/dpif-netdev.c
+++ b/lib/dpif-netdev.c
@@ -519,10 +519,17 @@ emc_cache_slow_sweep(struct emc_cache *flow_cache)
     flow_cache->sweep_idx = (flow_cache->sweep_idx + 1) & EM_FLOW_HASH_MASK;
 }
 
+/* Returns true if 'dpif' is a netdev or dummy dpif, false otherwise. */
+bool
+dpif_is_netdev(const struct dpif *dpif)
+{
+    return dpif->dpif_class->open == dpif_netdev_open;
+}
+
 static struct dpif_netdev *
 dpif_netdev_cast(const struct dpif *dpif)
 {
-    ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
+    ovs_assert(dpif_is_netdev(dpif));
     return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
 }
 
diff --git a/lib/dpif-netdev.h b/lib/dpif-netdev.h
index 5428b31a0..9e2dd23fc 100644
--- a/lib/dpif-netdev.h
+++ b/lib/dpif-netdev.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2015 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,6 +40,8 @@ static inline void dp_packet_pad(struct dp_packet *p)
     }
 }
 
+bool dpif_is_netdev(const struct dpif *);
+
 #define NR_QUEUE   1
 #define NR_PMD_THREADS 1
 
diff --git a/lib/dpif.c b/lib/dpif.c
index 783a715fb..6e26f30fd 100644
--- a/lib/dpif.c
+++ b/lib/dpif.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,6 +26,7 @@
 #include "coverage.h"
 #include "dpctl.h"
 #include "dp-packet.h"
+#include "dpif-netdev.h"
 #include "dynamic-string.h"
 #include "flow.h"
 #include "netdev.h"
@@ -1705,6 +1706,5 @@ log_flow_get_message(const struct dpif *dpif, const struct dpif_flow_get *get,
 bool
 dpif_supports_tnl_push_pop(const struct dpif *dpif)
 {
-   return !strcmp(dpif->dpif_class->type, "netdev") ||
-          !strcmp(dpif->dpif_class->type, "dummy");
+    return dpif_is_netdev(dpif);
 }