From e1bd1a40031402cea64b58a30e620a2603bc7cf8 Mon Sep 17 00:00:00 2001
From: Matthijs Mekking <matthijs@isc.org>
Date: Tue, 24 Mar 2026 17:01:26 +0100
Subject: [PATCH] Introduce zone functions dns_zone_(get|set)modded

Introduce new functions to set and get whether the zone configuration
has been modified with 'rndc modzone'.
---
 lib/dns/include/dns/zone.h | 20 ++++++++++++++++++++
 lib/dns/zone.c             | 20 ++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/lib/dns/include/dns/zone.h b/lib/dns/include/dns/zone.h
index 04719e4f8e..025282bea1 100644
--- a/lib/dns/include/dns/zone.h
+++ b/lib/dns/include/dns/zone.h
@@ -2243,6 +2243,26 @@ dns_zone_getadded(dns_zone_t *zone);
  * \li	'zone' to be valid.
  */
 
+void
+dns_zone_setmodded(dns_zone_t *zone, bool added);
+/*%
+ * Sets the value of zone->modded, which should be true for
+ * zones that were modified by "rndc modzone".
+ *
+ * Requires:
+ * \li	'zone' to be valid.
+ */
+
+bool
+dns_zone_getmodded(dns_zone_t *zone);
+/*%
+ * Returns true if the zone was modified at runtime
+ * using "rndc modzone".
+ *
+ * Requires:
+ * \li	'zone' to be valid.
+ */
+
 void
 dns_zone_setautomatic(dns_zone_t *zone, bool automatic);
 /*%
diff --git a/lib/dns/zone.c b/lib/dns/zone.c
index ea3ccb1c16..919613050a 100644
--- a/lib/dns/zone.c
+++ b/lib/dns/zone.c
@@ -422,6 +422,11 @@ struct dns_zone {
 	 */
 	bool added;
 
+	/*%
+	 * True if modded by "rndc modzone"
+	 */
+	bool modded;
+
 	/*%
 	 * True if added by automatically by named.
 	 */
@@ -22636,6 +22641,21 @@ dns_zone_getadded(dns_zone_t *zone) {
 	return zone->added;
 }
 
+void
+dns_zone_setmodded(dns_zone_t *zone, bool modded) {
+	REQUIRE(DNS_ZONE_VALID(zone));
+
+	LOCK_ZONE(zone);
+	zone->modded = modded;
+	UNLOCK_ZONE(zone);
+}
+
+bool
+dns_zone_getmodded(dns_zone_t *zone) {
+	REQUIRE(DNS_ZONE_VALID(zone));
+	return zone->modded;
+}
+
 isc_result_t
 dns_zone_dlzpostload(dns_zone_t *zone, dns_db_t *db) {
 	isc_time_t loadtime;