+ if (!uuid_str_valid(uuid_str))
+ return -EINVAL;
+
+ if (str_format == UUID_STR_FORMAT_STD) {
+ tmp32 = cpu_to_be32(simple_strtoul(uuid_str, NULL, 16));
+ memcpy(uuid_bin, &tmp32, 4);
+
+ tmp16 = cpu_to_be16(simple_strtoul(uuid_str + 9, NULL, 16));
+ memcpy(uuid_bin + 4, &tmp16, 2);
+
+ tmp16 = cpu_to_be16(simple_strtoul(uuid_str + 14, NULL, 16));
+ memcpy(uuid_bin + 6, &tmp16, 2);
+ } else {
+ tmp32 = cpu_to_le32(simple_strtoul(uuid_str, NULL, 16));
+ memcpy(uuid_bin, &tmp32, 4);
+
+ tmp16 = cpu_to_le16(simple_strtoul(uuid_str + 9, NULL, 16));
+ memcpy(uuid_bin + 4, &tmp16, 2);
+
+ tmp16 = cpu_to_le16(simple_strtoul(uuid_str + 14, NULL, 16));
+ memcpy(uuid_bin + 6, &tmp16, 2);
+ }
+
+ tmp16 = cpu_to_be16(simple_strtoul(uuid_str + 19, NULL, 16));
+ memcpy(uuid_bin + 8, &tmp16, 2);
+
+ tmp64 = cpu_to_be64(simple_strtoull(uuid_str + 24, NULL, 16));
+ memcpy(uuid_bin + 10, (char *)&tmp64 + 2, 6);
+
+ return 0;
+}
+
+/*
+ * uuid_bin_to_str() - convert big endian binary data to string UUID or GUID.
+ *
+ * @param uuid_bin - pointer to binary data of UUID (big endian) [16B]
+ * @param uuid_str - pointer to allocated array for output string [37B]
+ * @str_format - UUID string format: 0 - UUID; 1 - GUID
+ */
+void uuid_bin_to_str(unsigned char *uuid_bin, char *uuid_str, int str_format)
+{
+ const u8 uuid_char_order[UUID_BIN_LEN] = {0, 1, 2, 3, 4, 5, 6, 7, 8,
+ 9, 10, 11, 12, 13, 14, 15};
+ const u8 guid_char_order[UUID_BIN_LEN] = {3, 2, 1, 0, 5, 4, 7, 6, 8,
+ 9, 10, 11, 12, 13, 14, 15};
+ const u8 *char_order;
+ int i;
+
+ /*
+ * UUID and GUID bin data - always in big endian:
+ * 4B-2B-2B-2B-6B
+ * be be be be be
+ */
+ if (str_format == UUID_STR_FORMAT_STD)
+ char_order = uuid_char_order;
+ else
+ char_order = guid_char_order;
+
+ for (i = 0; i < 16; i++) {
+ sprintf(uuid_str, "%02x", uuid_bin[char_order[i]]);
+ uuid_str += 2;
+ switch (i) {
+ case 3:
+ case 5:
+ case 7:
+ case 9:
+ *uuid_str++ = '-';
+ break;
+ }
+ }
+}
+
+/*
+ * 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.
+*/
+#if defined(CONFIG_RANDOM_UUID) || defined(CONFIG_CMD_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);