/*
- * Public include file for the UUID library
- *
- * Copyright (C) 1996, 1997, 1998 Theodore Ts'o.
- * Copyright (C) 2002 Cluster File System
- * - changed for use in lustre
+ * 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
*
- * %Begin-Header%
- * This file may be redistributed under the terms of the GNU
- * Library General Public License.
- * %End-Header%
+ * 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
#ifndef __KERNEL__
# include <liblustre.h>
+#else
+# include <libcfs/libcfs.h>
#endif
#include <obd_support.h>
#include <obd_class.h>
-struct uuid {
- __u32 time_low;
- __u16 time_mid;
- __u16 time_hi_and_version;
- __u16 clock_seq;
- __u8 node[6];
-};
-static void uuid_unpack(class_uuid_t in, struct uuid *uu)
+static inline __u32 consume(int nob, __u8 **ptr)
{
- __u8 *ptr = in;
- __u32 tmp;
+ __u32 value;
- tmp = *ptr++;
- tmp = (tmp << 8) | *ptr++;
- tmp = (tmp << 8) | *ptr++;
- tmp = (tmp << 8) | *ptr++;
- uu->time_low = tmp;
+ LASSERT(nob <= sizeof value);
- tmp = *ptr++;
- tmp = (tmp << 8) | *ptr++;
- uu->time_mid = tmp;
+ for (value = 0; nob > 0; --nob)
+ value = (value << 8) | *((*ptr)++);
+ return value;
+}
- tmp = *ptr++;
- tmp = (tmp << 8) | *ptr++;
- uu->time_hi_and_version = tmp;
+#define CONSUME(val, ptr) (val) = consume(sizeof(val), (ptr))
- tmp = *ptr++;
- tmp = (tmp << 8) | *ptr++;
- uu->clock_seq = tmp;
+static void uuid_unpack(class_uuid_t in, __u16 *uu, int nr)
+{
+ __u8 *ptr = in;
- memcpy(uu->node, ptr, 6);
-}
+ LASSERT(nr * sizeof *uu == sizeof(class_uuid_t));
-void generate_random_uuid(unsigned char uuid_out[16]);
+ while (nr-- > 0)
+ CONSUME(uu[nr], &ptr);
+}
void class_uuid_unparse(class_uuid_t uu, struct obd_uuid *out)
{
- struct uuid uuid;
+ /* uu as an array of __u16's */
+ __u16 uuid[sizeof(class_uuid_t) / sizeof(__u16)];
+
+ CLASSERT(ARRAY_SIZE(uuid) == 8);
- uuid_unpack(uu, &uuid);
- sprintf(out->uuid,
- "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
- uuid.time_low, uuid.time_mid, uuid.time_hi_and_version,
- uuid.clock_seq >> 8, uuid.clock_seq & 0xFF,
- uuid.node[0], uuid.node[1], uuid.node[2],
- uuid.node[3], uuid.node[4], uuid.node[5]);
+ 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);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff