+
+/*
+ * gen_rand_uuid() - this function generates a random binary UUID version 4.
+ * In this version all fields beside 4 bits of version and
+ * 2 bits of variant are randomly generated.
+ *
+ * @param uuid_bin - pointer to allocated array [16B]. Output is in big endian.
+*/
+#ifdef CONFIG_RANDOM_UUID
+void gen_rand_uuid(unsigned char *uuid_bin)
+{
+ struct uuid uuid;
+ unsigned int *ptr = (unsigned int *)&uuid;
+ int i;
+
+ /* Set all fields randomly */
+ for (i = 0; i < sizeof(struct uuid) / sizeof(*ptr); i++)
+ *(ptr + i) = cpu_to_be32(rand());
+
+ clrsetbits_be16(&uuid.time_hi_and_version,
+ UUID_VERSION_MASK,
+ UUID_VERSION << UUID_VERSION_SHIFT);
+
+ clrsetbits_8(&uuid.clock_seq_hi_and_reserved,
+ UUID_VARIANT_MASK,
+ UUID_VARIANT << UUID_VARIANT_SHIFT);
+
+ memcpy(uuid_bin, &uuid, sizeof(struct uuid));
+}
+
+/*
+ * gen_rand_uuid_str() - this function generates UUID v4 (random) in two string
+ * formats UUID or GUID.
+ *
+ * @param uuid_str - pointer to allocated array [37B].
+ * @param - uuid output type: UUID - 0, GUID - 1
+ */
+void gen_rand_uuid_str(char *uuid_str, int str_format)
+{
+ unsigned char uuid_bin[UUID_BIN_LEN];
+
+ /* Generate UUID (big endian) */
+ gen_rand_uuid(uuid_bin);
+
+ /* Convert UUID bin to UUID or GUID formated STRING */
+ uuid_bin_to_str(uuid_bin, uuid_str, str_format);
+}
+#endif