1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/obdclass/uuid.c
38 * Public include file for the UUID library
41 #define DEBUG_SUBSYSTEM S_CLASS
44 # include <liblustre.h>
46 # include <libcfs/libcfs.h>
49 #include <obd_support.h>
50 #include <obd_class.h>
53 static inline __u32 consume(int nob, __u8 **ptr)
57 LASSERT(nob <= sizeof value);
59 for (value = 0; nob > 0; --nob)
60 value = (value << 8) | *((*ptr)++);
64 #define CONSUME(val, ptr) (val) = consume(sizeof(val), (ptr))
66 static void uuid_unpack(class_uuid_t in, __u16 *uu, int nr)
70 LASSERT(nr * sizeof *uu == sizeof(class_uuid_t));
73 CONSUME(uu[nr], &ptr);
76 void class_uuid_unparse(class_uuid_t uu, struct obd_uuid *out)
78 /* uu as an array of __u16's */
79 __u16 uuid[sizeof(class_uuid_t) / sizeof(__u16)];
81 CLASSERT(ARRAY_SIZE(uuid) == 8);
83 uuid_unpack(uu, uuid, ARRAY_SIZE(uuid));
84 sprintf(out->uuid, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
85 uuid[0], uuid[1], uuid[2], uuid[3],
86 uuid[4], uuid[5], uuid[6], uuid[7]);