1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
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.
9 *
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).
15 *
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.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 */
30 /*
31 * This file is part of Lustre, http://www.lustre.org/
32 * Lustre is a trademark of Sun Microsystems, Inc.
33 *
34 * lustre/obdclass/uuid.c
35 *
36 * Public include file for the UUID library
37 */
38
39 #define DEBUG_SUBSYSTEM S_CLASS
40
41 #include "../../include/linux/libcfs/libcfs.h"
42
43 #include "../include/obd_support.h"
44 #include "../include/obd_class.h"
45
46
consume(int nob,__u8 ** ptr)47 static inline __u32 consume(int nob, __u8 **ptr)
48 {
49 __u32 value;
50
51 LASSERT(nob <= sizeof(value));
52
53 for (value = 0; nob > 0; --nob)
54 value = (value << 8) | *((*ptr)++);
55 return value;
56 }
57
58 #define CONSUME(val, ptr) (val) = consume(sizeof(val), (ptr))
59
uuid_unpack(class_uuid_t in,__u16 * uu,int nr)60 static void uuid_unpack(class_uuid_t in, __u16 *uu, int nr)
61 {
62 __u8 *ptr = in;
63
64 LASSERT(nr * sizeof(*uu) == sizeof(class_uuid_t));
65
66 while (nr-- > 0)
67 CONSUME(uu[nr], &ptr);
68 }
69
class_uuid_unparse(class_uuid_t uu,struct obd_uuid * out)70 void class_uuid_unparse(class_uuid_t uu, struct obd_uuid *out)
71 {
72 /* uu as an array of __u16's */
73 __u16 uuid[sizeof(class_uuid_t) / sizeof(__u16)];
74
75 CLASSERT(ARRAY_SIZE(uuid) == 8);
76
77 uuid_unpack(uu, uuid, ARRAY_SIZE(uuid));
78 sprintf(out->uuid, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
79 uuid[0], uuid[1], uuid[2], uuid[3],
80 uuid[4], uuid[5], uuid[6], uuid[7]);
81 }
82 EXPORT_SYMBOL(class_uuid_unparse);
83