From ef1ca6c8822201307b279420777333f153565f90 Mon Sep 17 00:00:00 2001
From: "Yehoshua (Josh) Hershberg" <yehoshua@redislabs.com>
Date: Wed, 22 Nov 2023 11:32:23 +0200
Subject: [PATCH] add some file level comments and copyright (#12793)

A followup PR for #12742
Add some brief comments explaining the purpose of the file to the head
of cluster_legacy.c and cluster.c.
Add copyright notice to cluster.c

Signed-off-by: Josh Hershberg <yehoshua@redis.com>
Co-authored-by: Josh Hershberg <yehoshua@redis.com>
---
 src/cluster.c        | 35 +++++++++++++++++++++++++++++++++++
 src/cluster_legacy.c |  8 ++++++--
 2 files changed, 41 insertions(+), 2 deletions(-)

diff --git a/src/cluster.c b/src/cluster.c
index 74d6a4d6d..90c1291de 100644
--- a/src/cluster.c
+++ b/src/cluster.c
@@ -1,3 +1,38 @@
+/*
+ * Copyright (c) 2009-2012, Salvatore Sanfilippo <antirez at gmail dot com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * cluster.c contains the common parts of a clustering
+ * implementation, the parts that are shared between
+ * any implementation of Redis clustering.
+ */
+
 #include "server.h"
 #include "cluster.h"
 
diff --git a/src/cluster_legacy.c b/src/cluster_legacy.c
index b77bbdab3..0f20cbdbb 100644
--- a/src/cluster_legacy.c
+++ b/src/cluster_legacy.c
@@ -1,5 +1,4 @@
-/* Redis Cluster implementation.
- *
+/*
  * Copyright (c) 2009-2012, Salvatore Sanfilippo <antirez at gmail dot com>
  * All rights reserved.
  *
@@ -28,6 +27,11 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+/*
+ * cluster_legacy.c contains the implementation of the cluster API that is
+ * specific to the standard, Redis cluster-bus based clustering mechanism.
+ */
+
 #include "server.h"
 #include "cluster.h"
 #include "cluster_legacy.h"