Add statschannel counter for Root Key Sentinel feature

bin/named/statschannel.c

@@ -311,6 +311,8 @@ init_desc(void) {
 		       "QryUsedStale");
 	SET_NSSTATDESC(prefetch, "queries triggered prefetch", "Prefetch");
 	SET_NSSTATDESC(keytagopt, "Keytag option received", "KeyTagOpt");
+	SET_NSSTATDESC(rootkeysentinel, "Root key sentinel queries",
+		       "RootKeySentinel");
 	INSIST(i == ns_statscounter_max);
 
 	/* Initialize resolver statistics */

lib/ns/include/ns/stats.h

@@ -101,8 +101,9 @@ enum {
 
 	ns_statscounter_prefetch = 63,
 	ns_statscounter_keytagopt = 64,
+	ns_statscounter_rootkeysentinel = 65,
 
-	ns_statscounter_max = 65
+	ns_statscounter_max = 66
 };
 
 void

lib/ns/query.c

@@ -5166,6 +5166,7 @@ root_key_sentinel_detect(query_ctx_t *qctx) {
 		ns_client_log(qctx->client, NS_LOGCATEGORY_TAT,
 			      NS_LOGMODULE_QUERY, ISC_LOG_INFO,
 			      "root-key-sentinel-is-ta query label found");
+		inc_stats(qctx->client, ns_statscounter_rootkeysentinel);
 	} else if (qctx->client->query.qname->length > 31 && ndata[0] == 30 &&
 	           strncasecmp(ndata + 1, "root-key-sentinel-not-ta-", 25) == 0)
 	{
@@ -5181,6 +5182,7 @@ root_key_sentinel_detect(query_ctx_t *qctx) {
 		ns_client_log(qctx->client, NS_LOGCATEGORY_TAT,
 			      NS_LOGMODULE_QUERY, ISC_LOG_INFO,
 			      "root-key-sentinel-not-ta query label found");
+		inc_stats(qctx->client, ns_statscounter_rootkeysentinel);
 	}
 }