add dns_db_nodefullname()

the dyndb test requires a mechanism to retrieve the name associated
with a database node, and since the database no longer uses RBT for
its underlying storage, dns_rbt_fullnamefromnode() doesn't work.
addressed this by adding dns_db_nodefullname() to the database API.

bin/tests/system/dyndb/driver/db.c

@@ -76,21 +76,6 @@ struct sampledb {
 
 typedef struct sampledb sampledb_t;
 
-/*
- * Get full DNS name from the node.
- *
- * @warning
- * The code silently expects that "node" came from RBTDB and thus
- * assumption dns_dbnode_t (from RBTDB) == dns_rbtnode_t is correct.
- *
- * This should work as long as we use only RBTDB and nothing else.
- */
-static isc_result_t
-sample_name_fromnode(dns_dbnode_t *node, dns_name_t *name) {
-	dns_rbtnode_t *rbtnode = (dns_rbtnode_t *)node;
-	return (dns_rbt_fullnamefromnode(rbtnode, name));
-}
-
 static void
 destroy(dns_db_t *db) {
 	sampledb_t *sampledb = (sampledb_t *)db;
@@ -252,7 +237,8 @@ addrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
 	if (rdataset->type == dns_rdatatype_a ||
 	    rdataset->type == dns_rdatatype_aaaa)
 	{
-		CHECK(sample_name_fromnode(node, dns_fixedname_name(&name)));
+		CHECK(dns_db_nodefullname(sampledb->rbtdb, node,
+					  dns_fixedname_name(&name)));
 		CHECK(syncptrs(sampledb->inst, dns_fixedname_name(&name),
 			       rdataset, DNS_DIFFOP_ADD));
 	}
@@ -282,7 +268,8 @@ subtractrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
 	if (rdataset->type == dns_rdatatype_a ||
 	    rdataset->type == dns_rdatatype_aaaa)
 	{
-		CHECK(sample_name_fromnode(node, dns_fixedname_name(&name)));
+		CHECK(dns_db_nodefullname(sampledb->rbtdb, node,
+					  dns_fixedname_name(&name)));
 		CHECK(syncptrs(sampledb->inst, dns_fixedname_name(&name),
 			       rdataset, DNS_DIFFOP_DEL));
 	}
@@ -431,6 +418,15 @@ setcachestats(dns_db_t *db, isc_stats_t *stats) {
 	return (dns_db_setcachestats(sampledb->rbtdb, stats));
 }
 
+static isc_result_t
+nodefullname(dns_db_t *db, dns_dbnode_t *node, dns_name_t *name) {
+	sampledb_t *sampledb = (sampledb_t *)db;
+
+	REQUIRE(VALID_SAMPLEDB(sampledb));
+
+	return (dns_db_nodefullname(sampledb->rbtdb, node, name));
+}
+
 /*
  * DB interface definition. Database driver uses this structure to
  * determine which implementation of dns_db_*() function to call.
@@ -464,6 +460,7 @@ static dns_dbmethods_t sampledb_methods = {
 	.findnodeext = findnodeext,
 	.findext = findext,
 	.setcachestats = setcachestats,
+	.nodefullname = nodefullname,
 };
 
 /* Auxiliary driver functions. */

lib/dns/db.c

@@ -142,7 +142,7 @@ dns_db_create(isc_mem_t *mctx, const char *db_type, const dns_name_t *origin,
 
 #if DNS_DB_TRACE
 		fprintf(stderr, "dns_db_create:%s:%s:%d:%p->references = 1\n",
-			__func__, __FILE__, __LINE__ + 1, *dbp);
+			__func__, __FILE__, __LINE__ 1, *dbp);
 #endif
 		return (result);
 	}
@@ -1149,3 +1149,15 @@ dns_db_deletedata(dns_db_t *db, dns_dbnode_t *node, void *data) {
 		(db->methods->deletedata)(db, node, data);
 	}
 }
+
+isc_result_t
+dns_db_nodefullname(dns_db_t *db, dns_dbnode_t *node, dns_name_t *name) {
+	REQUIRE(db != NULL);
+	REQUIRE(node != NULL);
+	REQUIRE(name != NULL);
+
+	if (db->methods->nodefullname != NULL) {
+		return ((db->methods->nodefullname)(db, node, name));
+	}
+	return (ISC_R_NOTIMPLEMENTED);
+}

lib/dns/include/dns/db.h

@@ -179,6 +179,8 @@ typedef struct dns_dbmethods {
 				dns_rdataset_t *rdataset, dns_message_t *msg);
 	void (*expiredata)(dns_db_t *db, dns_dbnode_t *node, void *data);
 	void (*deletedata)(dns_db_t *db, dns_dbnode_t *node, void *data);
+	isc_result_t (*nodefullname)(dns_db_t *db, dns_dbnode_t *node,
+				     dns_name_t *name);
 } dns_dbmethods_t;
 
 typedef isc_result_t (*dns_dbcreatefunc_t)(isc_mem_t	    *mctx,
@@ -1782,6 +1784,14 @@ dns_db_deletedata(dns_db_t *db, dns_dbnode_t *node, void *data);
  * data from an LRU list or a heap.
  */
 
-void
-dns_db_expiredata(dns_db_t *db, dns_dbnode_t *node, void *data);
+isc_result_t
+dns_db_nodefullname(dns_db_t *db, dns_dbnode_t *node, dns_name_t *name);
+/*%<
+ * Get the name associated with a database node.
+ *
+ * Requires:
+ *
+ * \li 'db' is a valid database
+ * \li 'node' and 'name' are not NULL
+ */
 ISC_LANG_ENDDECLS

lib/dns/qp-cachedb.c

@@ -1549,6 +1549,7 @@ dns_dbmethods_t dns__qpdb_cachemethods = {
 	.unlocknode = dns__qpdb_unlocknode,
 	.expiredata = expiredata,
 	.deletedata = dns__qpdb_deletedata,
+	.nodefullname = dns__qpdb_nodefullname,
 };
 
 /*

lib/dns/qp-zonedb.c

@@ -2379,6 +2379,7 @@ dns_dbmethods_t dns__qpdb_zonemethods = {
 	.unlocknode = dns__qpdb_unlocknode,
 	.addglue = addglue,
 	.deletedata = dns__qpdb_deletedata,
+	.nodefullname = dns__qpdb_nodefullname,
 };
 
 void