vhost: add missing C++ guards

[ upstream commit cedca40 ]

Some public header files were missing 'extern "C"' C++ guards,
and couldn't be used by C++ applications. Add the missing guards.

Fixes: d7280c9 ("vhost: support selective datapath")
Fixes: 78639d5 ("vhost: introduce async enqueue registration API")
Fixes: 3bb595e ("vhost/crypto: add request handler")
Fixes: 94c16e8 ("vhost: mark vDPA driver API as internal")

Signed-off-by: Brian Dooley <brian.dooley@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
Acked-by: Tyler Retzlaff <roretzla@linux.microsoft.com>

lib/librte_vhost/rte_vdpa.h

@@ -5,6 +5,10 @@
 #ifndef _RTE_VDPA_H_
 #define _RTE_VDPA_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * @file
  *
@@ -183,4 +187,9 @@ rte_vdpa_get_stats(struct rte_vdpa_device *dev, uint16_t qid,
  */
 int
 rte_vdpa_reset_stats(struct rte_vdpa_device *dev, uint16_t qid);
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* _RTE_VDPA_H_ */

lib/librte_vhost/rte_vdpa_dev.h

@@ -5,6 +5,10 @@
 #ifndef _RTE_VDPA_H_DEV_
 #define _RTE_VDPA_H_DEV_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stdbool.h>
 
 #include "rte_vhost.h"
@@ -135,4 +139,8 @@ rte_vhost_host_notifier_ctrl(int vid, uint16_t qid, bool enable);
 int
 rte_vdpa_relay_vring_used(int vid, uint16_t qid, void *vring_m);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* _RTE_VDPA_DEV_H_ */

lib/librte_vhost/rte_vhost_crypto.h

@@ -5,6 +5,10 @@
 #ifndef _VHOST_CRYPTO_H_
 #define _VHOST_CRYPTO_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stdint.h>
 
 #include <rte_compat.h>
@@ -137,4 +141,8 @@ uint16_t
 rte_vhost_crypto_finalize_requests(struct rte_crypto_op **ops,
 		uint16_t nb_ops, int *callfds, uint16_t *nb_callfds);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /**< _VHOST_CRYPTO_H_ */