From cc3070a0b383463cc4a470b89c2668471cb42e00 Mon Sep 17 00:00:00 2001
From: Evan Hunt <each@isc.org>
Date: Sat, 2 Jul 2022 13:09:25 -0700
Subject: [PATCH] log the reason for falling back to AXFR from IXFR at level
 info

messages indicating the reason for a fallback to AXFR (i.e, because
the requested serial number is not present in the journal, or because
the size of the IXFR response would exceeed "max-ixfr-ratio") are now
logged at level info instead of debug(4).

(cherry picked from commit df1d81cf961b49172583e2424177b52a89caf041)
---
 CHANGES         | 4 ++++
 lib/ns/xfrout.c | 4 ++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/CHANGES b/CHANGES
index 0958628bc9..13d9e9fe3b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+5924.	[func]		When it's necessary to use AXFR to respond to an
+			IXFR request, a message explaining the reason
+			is now logged at level info. [GL #2683]
+
 5923.	[bug]		Fix inheritance for dnssec-policy when checking for
 			inline-signing. [GL #3438]
 
diff --git a/lib/ns/xfrout.c b/lib/ns/xfrout.c
index e2d11fa269..bb3e2c4cd6 100644
--- a/lib/ns/xfrout.c
+++ b/lib/ns/xfrout.c
@@ -1029,7 +1029,7 @@ got_soa:
 		}
 		if (result == ISC_R_NOTFOUND || result == ISC_R_RANGE) {
 			xfrout_log1(client, question_name, question_class,
-				    ISC_LOG_DEBUG(4),
+				    ISC_LOG_INFO,
 				    "IXFR version not in journal, "
 				    "falling back to AXFR");
 			mnemonic = "AXFR-style IXFR";
@@ -1044,7 +1044,7 @@ got_soa:
 				data_stream->methods->destroy(&data_stream);
 				data_stream = NULL;
 				xfrout_log1(client, question_name,
-					    question_class, ISC_LOG_DEBUG(4),
+					    question_class, ISC_LOG_INFO,
 					    "IXFR delta size (%zu bytes) "
 					    "exceeds the maximum ratio to "
 					    "database size "