From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/lib/uuid.c | 20 +++++++++++---------
1 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/kernel/lib/uuid.c b/kernel/lib/uuid.c
index 2290b9f..562d539 100644
--- a/kernel/lib/uuid.c
+++ b/kernel/lib/uuid.c
@@ -1,17 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Unified UUID/GUID definition
*
* Copyright (C) 2009, 2016 Intel Corp.
* Huang Ying <ying.huang@intel.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation;
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
*/
#include <linux/kernel.h>
@@ -48,6 +40,16 @@
}
EXPORT_SYMBOL(generate_random_uuid);
+void generate_random_guid(unsigned char guid[16])
+{
+ get_random_bytes(guid, 16);
+ /* Set GUID version to 4 --- truly random generation */
+ guid[7] = (guid[7] & 0x0F) | 0x40;
+ /* Set the GUID variant to DCE */
+ guid[8] = (guid[8] & 0x3F) | 0x80;
+}
+EXPORT_SYMBOL(generate_random_guid);
+
static void __uuid_gen_common(__u8 b[16])
{
prandom_bytes(b, 16);
--
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