1 files changed, 20 insertions, 0 deletions

diff --git a/lib/uuid.c b/lib/uuid.c
index 398821e4dce1..6c81c0b0467e 100644
--- a/lib/uuid.c
+++ b/lib/uuid.c
@@ -23,6 +23,26 @@
 #include <linux/uuid.h>
 #include <linux/random.h>
 
+/***************************************************************
+ * Random UUID interface
+ *
+ * Used here for a Boot ID, but can be useful for other kernel
+ * drivers.
+ ***************************************************************/
+
+/*
+ * Generate random UUID
+ */
+void generate_random_uuid(unsigned char uuid[16])
+{
+        get_random_bytes(uuid, 16);
+        /* Set UUID version to 4 --- truly random generation */
+        uuid[6] = (uuid[6] & 0x0F) | 0x40;
+        /* Set the UUID variant to DCE */
+        uuid[8] = (uuid[8] & 0x3F) | 0x80;
+}
+EXPORT_SYMBOL(generate_random_uuid);
+
 static void __uuid_gen_common(__u8 b[16])
 {
         prandom_bytes(b, 16);