4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2014, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/obdclass/uuid.c
34 * Public include file for the UUID library
37 #define DEBUG_SUBSYSTEM S_CLASS
39 #include <libcfs/libcfs.h>
40 #include <obd_support.h>
41 #include <obd_class.h>
43 static inline size_t consume(size_t nob, __u8 **ptr)
47 LASSERT(nob <= sizeof(value));
49 for (value = 0; nob > 0; --nob)
50 value = (value << 8) | *((*ptr)++);
54 #define CONSUME(val, ptr) (val) = consume(sizeof(val), (ptr))
56 static void uuid_unpack(class_uuid_t in, __u16 *uu, size_t nr)
60 LASSERT(nr * sizeof(*uu) == sizeof(class_uuid_t));
63 CONSUME(uu[nr], &ptr);
66 void class_uuid_unparse(class_uuid_t uu, struct obd_uuid *out)
68 /* uu as an array of __u16's */
69 __u16 uuid[sizeof(class_uuid_t) / sizeof(__u16)];
71 CLASSERT(ARRAY_SIZE(uuid) == 8);
73 uuid_unpack(uu, uuid, ARRAY_SIZE(uuid));
74 sprintf(out->uuid, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
75 uuid[0], uuid[1], uuid[2], uuid[3],
76 uuid[4], uuid[5], uuid[6], uuid[7]);
78 EXPORT_SYMBOL(class_uuid_unparse);