Fix delegdb flush API

The `rndc flush` command flushes the delegdb by deleting the
existing database and creating a new one. In the process, the
delegdb was losing its configured size limit; as a result, once
flushed, the delegdb size became unbounded.

This is now fixed by using `dns_delegdb_getconfig()` to back up the
current configuration before instantiating a new delegdb, then
restoring it with `dns_delegdb_setconfig()`.

diff --git a/bin/named/server.c b/bin/named/server.c
index 52faae029cd83f867bfc7c7a58848a5c6a8b61c8..c58a01467e721d1ca00fb8af3cbbdc58f8379ec0 100644 (file)
--- a/bin/named/server.c
+++ b/bin/named/server.c
@@ -11263,9 +11263,12 @@ cleanup:
 
 static void
 flush_delegdb(dns_view_t *view) {
+       dns_delegdb_config_t config = dns_delegdb_getconfig(view->deleg);
+
        dns_delegdb_shutdown(view->deleg);
        dns_delegdb_detach(&view->deleg);
        dns_delegdb_create(&view->deleg);
+       dns_delegdb_setconfig(view->deleg, &config);
 }
 
 isc_result_t