dns/ssu.c: Return void when ISC_R_SUCCESS is only returned value

With isc_mem_get() and dns_name_dup() no longer being able to fail, some
functions can now only return ISC_R_SUCCESS.  Change the return type to
void for the following function(s):

 * dns_ssutable_addrule()
 * dns_ssutable_create()
 * dns_ssutable_createdlz()

bin/named/zoneconf.c

@@ -202,7 +202,7 @@ configure_zone_ssutable(const cfg_obj_t *zconfig, dns_zone_t *zone,
 	dns_ssutable_t *table = NULL;
 	isc_mem_t *mctx = dns_zone_getmctx(zone);
 	bool autoddns = false;
-	isc_result_t result;
+	isc_result_t result = ISC_R_SUCCESS;
 
 	(void)cfg_map_get(zconfig, "update-policy", &updatepolicy);
 
@@ -218,10 +218,7 @@ configure_zone_ssutable(const cfg_obj_t *zconfig, dns_zone_t *zone,
 		updatepolicy = NULL;
 	}
 
-	result = dns_ssutable_create(mctx, &table);
-	if (result != ISC_R_SUCCESS) {
-		return (result);
-	}
+	dns_ssutable_create(mctx, &table);
 
 	for (element = cfg_list_first(updatepolicy); element != NULL;
 	     element = cfg_list_next(element))
@@ -342,15 +339,12 @@ configure_zone_ssutable(const cfg_obj_t *zconfig, dns_zone_t *zone,
 		}
 		INSIST(i == n);
 
-		result = dns_ssutable_addrule(
-			table, grant, dns_fixedname_name(&fident), mtype,
-			dns_fixedname_name(&fname), n, types);
+		dns_ssutable_addrule(table, grant, dns_fixedname_name(&fident),
+				     mtype, dns_fixedname_name(&fname), n,
+				     types);
 		if (types != NULL) {
 			isc_mem_put(mctx, types, n * sizeof(*types));
 		}
-		if (result != ISC_R_SUCCESS) {
-			goto cleanup;
-		}
 	}
 
 	/*
@@ -371,17 +365,12 @@ configure_zone_ssutable(const cfg_obj_t *zconfig, dns_zone_t *zone,
 			goto cleanup;
 		}
 
-		result = dns_ssutable_addrule(
-			table, true, named_g_server->session_keyname,
-			dns_ssumatchtype_local, dns_zone_getorigin(zone), 1,
-			&any);
-
-		if (result != ISC_R_SUCCESS) {
-			goto cleanup;
-		}
+		dns_ssutable_addrule(table, true,
+				     named_g_server->session_keyname,
+				     dns_ssumatchtype_local,
+				     dns_zone_getorigin(zone), 1, &any);
 	}
 
-	result = ISC_R_SUCCESS;
 	dns_zone_setssutable(zone, table);
 
 cleanup:

lib/dns/dlz.c

@@ -464,11 +464,7 @@ dns_dlz_writeablezone(dns_view_t *view, dns_dlzdb_t *dlzdb,
 	dns_zone_setadded(zone, true);
 
 	if (dlzdb->ssutable == NULL) {
-		result = dns_ssutable_createdlz(dlzdb->mctx, &dlzdb->ssutable,
-						dlzdb);
-		if (result != ISC_R_SUCCESS) {
-			goto cleanup;
-		}
+		dns_ssutable_createdlz(dlzdb->mctx, &dlzdb->ssutable, dlzdb);
 	}
 	dns_zone_setssutable(zone, dlzdb->ssutable);
 

lib/dns/include/dns/ssu.h

@@ -52,7 +52,7 @@ typedef struct dns_ssuruletype {
 	unsigned int	max;  /* maximum number of records allowed. */
 } dns_ssuruletype_t;
 
-isc_result_t
+void
 dns_ssutable_create(isc_mem_t *mctx, dns_ssutable_t **table);
 /*%<
  *	Creates a table that will be used to store simple-secure-update rules.
@@ -67,7 +67,7 @@ dns_ssutable_create(isc_mem_t *mctx, dns_ssutable_t **table);
  *\li		ISC_R_NOMEMORY
  */
 
-isc_result_t
+void
 dns_ssutable_createdlz(isc_mem_t *mctx, dns_ssutable_t **tablep,
 		       dns_dlzdb_t *dlzdatabase);
 /*%<
@@ -104,7 +104,7 @@ dns_ssutable_detach(dns_ssutable_t **tablep);
  *			resources used by the table will be freed.
  */
 
-isc_result_t
+void
 dns_ssutable_addrule(dns_ssutable_t *table, bool grant,
 		     const dns_name_t *identity, dns_ssumatchtype_t matchtype,
 		     const dns_name_t *name, unsigned int ntypes,

lib/dns/ssu.c

@@ -57,7 +57,7 @@ struct dns_ssutable {
 	ISC_LIST(dns_ssurule_t) rules;
 };
 
-isc_result_t
+void
 dns_ssutable_create(isc_mem_t *mctx, dns_ssutable_t **tablep) {
 	dns_ssutable_t *table;
 
@@ -71,7 +71,6 @@ dns_ssutable_create(isc_mem_t *mctx, dns_ssutable_t **tablep) {
 	ISC_LIST_INIT(table->rules);
 	table->magic = SSUTABLEMAGIC;
 	*tablep = table;
-	return (ISC_R_SUCCESS);
 }
 
 static inline void
@@ -129,7 +128,7 @@ dns_ssutable_detach(dns_ssutable_t **tablep) {
 	}
 }
 
-isc_result_t
+void
 dns_ssutable_addrule(dns_ssutable_t *table, bool grant,
 		     const dns_name_t *identity, dns_ssumatchtype_t matchtype,
 		     const dns_name_t *name, unsigned int ntypes,
@@ -177,8 +176,6 @@ dns_ssutable_addrule(dns_ssutable_t *table, bool grant,
 
 	rule->magic = SSURULEMAGIC;
 	ISC_LIST_INITANDAPPEND(table->rules, rule, link);
-
-	return (ISC_R_SUCCESS);
 }
 
 static inline bool
@@ -599,19 +596,15 @@ dns_ssutable_nextrule(dns_ssurule_t *rule, dns_ssurule_t **nextrule) {
 /*
  * Create a specialised SSU table that points at an external DLZ database
  */
-isc_result_t
+void
 dns_ssutable_createdlz(isc_mem_t *mctx, dns_ssutable_t **tablep,
 		       dns_dlzdb_t *dlzdatabase) {
-	isc_result_t result;
 	dns_ssurule_t *rule;
 	dns_ssutable_t *table = NULL;
 
 	REQUIRE(tablep != NULL && *tablep == NULL);
 
-	result = dns_ssutable_create(mctx, &table);
-	if (result != ISC_R_SUCCESS) {
-		return (result);
-	}
+	dns_ssutable_create(mctx, &table);
 
 	table->dlzdatabase = dlzdatabase;
 
@@ -627,7 +620,6 @@ dns_ssutable_createdlz(isc_mem_t *mctx, dns_ssutable_t **tablep,
 
 	ISC_LIST_INITANDAPPEND(table->rules, rule, link);
 	*tablep = table;
-	return (ISC_R_SUCCESS);
 }
 
 isc_result_t