From a6513c44d5576f94485630d5a0273c49f5c6c66e Mon Sep 17 00:00:00 2001
From: Petr Spacek <pspacek@redhat.com>
Date: May 21 2015 12:06:38 +0000
Subject: Add function for node deletion from generic meta-database.


https://fedorahosted.org/bind-dyndb-ldap/ticket/151

---

diff --git a/src/metadb.c b/src/metadb.c
index b9caf24..e36f281 100644
--- a/src/metadb.c
+++ b/src/metadb.c
@@ -9,6 +9,7 @@
 
 #include <dns/db.h>
 #include <dns/rdatalist.h>
+#include <dns/rdatasetiter.h>
 
 #include "metadb.h"
 #include "util.h"
@@ -147,6 +148,45 @@ metadb_node_close(metadb_node_t **nodep) {
 }
 
 /**
+ * Delete all RRsets in given metaDB node.
+ */
+isc_result_t
+metadb_node_delete(metadb_node_t **nodep) {
+	isc_result_t result;
+	metadb_node_t *node;
+	dns_rdatasetiter_t *iter = NULL;
+	dns_rdataset_t rdataset;
+
+	REQUIRE(nodep != NULL && *nodep != NULL);
+	node = *nodep;
+
+	dns_rdataset_init(&rdataset);
+	CHECK(dns_db_allrdatasets(node->rbtdb, node->dbnode, node->version, 0,
+				  &iter));
+
+	for (result = dns_rdatasetiter_first(iter);
+	     result == ISC_R_SUCCESS;
+	     result = dns_rdatasetiter_next(iter)) {
+
+		dns_rdatasetiter_current(iter, &rdataset);
+		CHECK(dns_db_deleterdataset(node->rbtdb, node->dbnode,
+					    node->version, rdataset.type, 0));
+		dns_rdataset_disassociate(&rdataset);
+	}
+	if (result == ISC_R_NOMORE)
+		result = ISC_R_SUCCESS;
+
+cleanup:
+	if (dns_rdataset_isassociated(&rdataset))
+		dns_rdataset_disassociate(&rdataset);
+	if (iter != NULL)
+		dns_rdatasetiter_destroy(&iter);
+	if (result == ISC_R_SUCCESS)
+		metadb_node_close(nodep);
+	return result;
+}
+
+/**
  * Create new "metaDB node" structure and attach underlying RBT DB node to it.
  *
  * @param[in]  version Underlying RBTDB version to use.
diff --git a/src/metadb.h b/src/metadb.h
index f1869d8..681535d 100644
--- a/src/metadb.h
+++ b/src/metadb.h
@@ -53,4 +53,7 @@ metadb_rdataset_get(metadb_node_t *node, dns_rdatatype_t rrtype,
 void ATTR_NONNULLS
 metadb_node_close(metadb_node_t **nodep);
 
+isc_result_t ATTR_NONNULLS
+metadb_node_delete(metadb_node_t **nodep);
+
 #endif /* SRC_METADB_H_ */