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.sun.com/software/products/lustre/docs/GPLv2.pdf
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
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
31 * This file is part of Lustre, http://www.lustre.org/
32 * Lustre is a trademark of Sun Microsystems, Inc.
34 * lustre/obdclass/uuid.c
36 * Public include file for the UUID library
39 #define DEBUG_SUBSYSTEM S_CLASS
42 # include <liblustre.h>
44 # include <libcfs/libcfs.h>
47 #include <obd_support.h>
48 #include <obd_class.h>
51 static inline __u32 consume(int nob, __u8 **ptr)
55 LASSERT(nob <= sizeof value);
57 for (value = 0; nob > 0; --nob)
58 value = (value << 8) | *((*ptr)++);
62 #define CONSUME(val, ptr) (val) = consume(sizeof(val), (ptr))
64 static void uuid_unpack(class_uuid_t in, __u16 *uu, int nr)
68 LASSERT(nr * sizeof *uu == sizeof(class_uuid_t));
71 CONSUME(uu[nr], &ptr);
74 void class_uuid_unparse(class_uuid_t uu, struct obd_uuid *out)
76 /* uu as an array of __u16's */
77 __u16 uuid[sizeof(class_uuid_t) / sizeof(__u16)];
79 CLASSERT(ARRAY_SIZE(uuid) == 8);
81 uuid_unpack(uu, uuid, ARRAY_SIZE(uuid));
82 sprintf(out->uuid, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
83 uuid[0], uuid[1], uuid[2], uuid[3],
84 uuid[4], uuid[5], uuid[6], uuid[7]);
86 EXPORT_SYMBOL(class_uuid_unparse);