--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/buffer_const.c	Tue Jul 11 00:17:36 2017 +0300
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2017 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "buffer_impl.h"
+
+static int const_buffer_check_append(struct buffer *buffer, const void *data,
+				     size_t size)
+{
+	return -EROFS;
+}
+
+const struct buffer_ops const_buffer = {
+	.check_append = const_buffer_check_append,
+
+	/*
+	 * no need for:
+	 *  - realloc since we have a borrowed const buffer
+	 *  - free since we have a borrowed const buffer
+	 */
+
+	.copyin = generic_buffer_copyin_panic,
+};