| /* |
| * GPL HEADER START |
| * |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 only, |
| * as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License version 2 for more details (a copy is included |
| * in the LICENSE file that accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License |
| * version 2 along with this program; If not, see |
| * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| * GPL HEADER END |
| */ |
| /* |
| * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| * |
| * lustre/obdclass/uuid.c |
| * |
| * Public include file for the UUID library |
| */ |
| |
| #define DEBUG_SUBSYSTEM S_CLASS |
| |
| #include "../../include/linux/libcfs/libcfs.h" |
| |
| #include "../include/obd_support.h" |
| #include "../include/obd_class.h" |
| |
| |
| static inline __u32 consume(int nob, __u8 **ptr) |
| { |
| __u32 value; |
| |
| LASSERT(nob <= sizeof(value)); |
| |
| for (value = 0; nob > 0; --nob) |
| value = (value << 8) | *((*ptr)++); |
| return value; |
| } |
| |
| #define CONSUME(val, ptr) (val) = consume(sizeof(val), (ptr)) |
| |
| static void uuid_unpack(class_uuid_t in, __u16 *uu, int nr) |
| { |
| __u8 *ptr = in; |
| |
| LASSERT(nr * sizeof(*uu) == sizeof(class_uuid_t)); |
| |
| while (nr-- > 0) |
| CONSUME(uu[nr], &ptr); |
| } |
| |
| void class_uuid_unparse(class_uuid_t uu, struct obd_uuid *out) |
| { |
| /* uu as an array of __u16's */ |
| __u16 uuid[sizeof(class_uuid_t) / sizeof(__u16)]; |
| |
| CLASSERT(ARRAY_SIZE(uuid) == 8); |
| |
| uuid_unpack(uu, uuid, ARRAY_SIZE(uuid)); |
| sprintf(out->uuid, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x", |
| uuid[0], uuid[1], uuid[2], uuid[3], |
| uuid[4], uuid[5], uuid[6], uuid[7]); |
| } |
| EXPORT_SYMBOL(class_uuid_unparse); |