service: fix memory leak with new function

The rte_service_finalize routine checks if service is initialized
or not. If yes; releases internal memory for services and lcore
states are freed. This routine is to be invoked at end of application
termination.

Fixes: 21698354c832 ("service: introduce service cores concept")
Cc: stable@dpdk.org

Signed-off-by: Vipin Varghese <vipin.varghese@intel.com>
Acked-by: Harry van Haaren <harry.van.haaren@intel.com>

lib/librte_eal/common/include/rte_service.h

@@ -429,6 +429,17 @@ int32_t rte_service_attr_get(uint32_t id, uint32_t attr_id,
  */
 int32_t rte_service_attr_reset_all(uint32_t id);
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Free up the memory that has been initialized. This routine
+ * is to be invoked prior to process termination.
+ *
+ * @retval None
+ */
+void rte_service_finalize(void);
+
 #ifdef __cplusplus
 }
 #endif

lib/librte_eal/common/rte_service.c

@@ -114,6 +114,20 @@ fail_mem:
 	return -ENOMEM;
 }
 
+void rte_service_finalize(void)
+{
+	if (!rte_service_library_initialized)
+		return;
+
+	if (rte_services)
+		rte_free(rte_services);
+
+	if (lcore_states)
+		rte_free(lcore_states);
+
+	rte_service_library_initialized = 0;
+}
+
 /* returns 1 if service is registered and has not been unregistered
  * Returns 0 if service never registered, or has been unregistered
  */

lib/librte_eal/rte_eal_version.map

@@ -223,6 +223,7 @@ EXPERIMENTAL {
 	rte_service_component_unregister;
 	rte_service_component_runstate_set;
 	rte_service_dump;
+	rte_service_finalize;
 	rte_service_get_by_id;
 	rte_service_get_by_name;
 	rte_service_get_count;