util/uuid: add a new uuid copy API.

Change-Id: I03042c4a7030eaac406e3c3afe6fe2f69bd9db36
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/436301
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Tested-by: Jim Harris <james.r.harris@intel.com>

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## v19.01: (Upcoming Release)
 
+### util
+
+A new uuid API `spdk_uuid_copy` was added to make a copy of the source uuid.
+
 ### nvme
 
 admin_timeout_ms was added to NVMe controller initialization options, users

include/spdk/uuid.h

@@ -93,6 +93,14 @@ int spdk_uuid_compare(const struct spdk_uuid *u1, const struct spdk_uuid *u2);
  */
 void spdk_uuid_generate(struct spdk_uuid *uuid);
 
+/**
+ * Copy a UUID.
+ *
+ * \param src Source UUID to copy from.
+ * \param dst Destination UUID to store.
+ */
+void spdk_uuid_copy(struct spdk_uuid *dst, const struct spdk_uuid *src);
+
 #ifdef __cplusplus
 }
 #endif

lib/util/uuid.c

@@ -65,3 +65,9 @@ spdk_uuid_generate(struct spdk_uuid *uuid)
 {
 	uuid_generate((void *)uuid);
 }
+
+void
+spdk_uuid_copy(struct spdk_uuid *dst, const struct spdk_uuid *src)
+{
+	uuid_copy((void *)dst, (void *)src);
+}