OpenSolaris Launch

1 files changed, 810 insertions, 0 deletions

diff --git a/usr/src/lib/libuuid/common/uuid.c b/usr/src/lib/libuuid/common/uuid.c
new file mode 100644
index 0000000000..1be9fba0d1
--- /dev/null
+++ b/usr/src/lib/libuuid/common/uuid.c
@@ -0,0 +1,810 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+ * The copyright in this file is taken from the original Leach & Salz
+ * UUID specification, from which this implementation is derived.
+ */
+
+/*
+ * Copyright (c) 1990- 1993, 1996 Open Software Foundation, Inc.
+ * Copyright (c) 1989 by Hewlett-Packard Company, Palo Alto, Ca. &
+ * Digital Equipment Corporation, Maynard, Mass.  Copyright (c) 1998
+ * Microsoft.  To anyone who acknowledges that this file is provided
+ * "AS IS" without any express or implied warranty: permission to use,
+ * copy, modify, and distribute this file for any purpose is hereby
+ * granted without fee, provided that the above copyright notices and
+ * this notice appears in all source code copies, and that none of the
+ * names of Open Software Foundation, Inc., Hewlett-Packard Company,
+ * or Digital Equipment Corporation be used in advertising or
+ * publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Neither Open Software
+ * Foundation, Inc., Hewlett-Packard Company, Microsoft, nor Digital
+ * Equipment Corporation makes any representations about the
+ * suitability of this software for any purpose.
+ */
+
+/*
+ * Module:		uuid.c
+ *
+ * Description:		This module is the workhorse for generating abstract
+ *			UUIDs.  It delegates system-specific tasks (such
+ *			as obtaining the node identifier or system time)
+ *			to the sysdep module.
+ */
+
+#include <ctype.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <uuid/uuid.h>
+#include <thread.h>
+#include <synch.h>
+#include "uuid_misc.h"
+
+#define	STATE_LOCATION		"/var/sadm/system/uuid_state"
+#define	URANDOM_PATH		"/dev/urandom"
+#define	MAX_RETRY		8
+#define	UUID_PRINTF_SIZE	37
+#define	VER1_MASK		0xefff
+
+static	mutex_t			ulock = DEFAULTMUTEX;
+
+uint16_t	_get_random(void);
+void		_get_current_time(uuid_time_t *);
+void		struct_to_string(uuid_t, struct uuid *);
+void		string_to_struct(struct uuid *, uuid_t);
+int		get_ethernet_address(uuid_node_t *);
+
+/*
+ * local functions
+ */
+static	int	_lock_state(char *);
+static	void	_unlock_state(int);
+static	void	_read_state(int, uint16_t *, uuid_time_t *,
+		    uuid_node_t *);
+static	int	_write_state(int, uint16_t, uuid_time_t, uuid_node_t);
+static	void 	_format_uuid(struct uuid *, uint16_t, uuid_time_t,
+		    uuid_node_t);
+static	void	fill_random_bytes(uchar_t *, int);
+static	int	uuid_create(struct uuid *);
+
+static	void	gen_ethernet_address(uuid_node_t *);
+/*
+ * Name:		uuid_create.
+ *
+ * Description:	Generates a uuid based on Version 1 format
+ *
+ * Returns:	0 on success, -1 on Error
+ */
+static int
+uuid_create(struct uuid *uuid)
+{
+	uuid_time_t	timestamp, last_time;
+	uint16_t	clockseq = 0;
+	uuid_node_t	last_node;
+	uuid_node_t	system_node;
+	int		locked_state_fd;
+	int		non_unique = 0;
+
+	if (mutex_lock(&ulock) != 0) {
+	    return (-1);
+	}
+
+	gen_ethernet_address(&system_node);
+	/*
+	 * acquire system wide lock so we're alone
+	 */
+	locked_state_fd = _lock_state(STATE_LOCATION);
+	if (locked_state_fd < 0) {
+	    /* couldn't create and/or lock state; don't have access */
+	    non_unique++;
+	} else {
+	    /* read saved state from disk */
+	    _read_state(locked_state_fd, &clockseq, &last_time,
+			&last_node);
+	}
+
+	if (clockseq == 0) {
+	    /* couldn't read clock sequence; generate a random one */
+	    clockseq = _get_random();
+	    non_unique++;
+	}
+	if (memcmp(&system_node, &last_node, sizeof (uuid_node_t)) != 0) {
+	    clockseq++;
+	}
+
+	/*
+	 * get current time
+	 */
+	_get_current_time(&timestamp);
+
+	/*
+	 * If timestamp is not set or is not in the past,
+	 * increment clock sequence.
+	 */
+	if ((last_time == 0) || (last_time >= timestamp)) {
+	    clockseq++;
+	    last_time = timestamp;
+	}
+
+	if (non_unique)
+		system_node.nodeID[0] |= 0x80;
+	/*
+	 * stuff fields into the UUID
+	 */
+	_format_uuid(uuid, clockseq, timestamp, system_node);
+	if ((locked_state_fd >= 0) &&
+		(_write_state(locked_state_fd, clockseq, timestamp,
+		system_node) == -1)) {
+	    _unlock_state(locked_state_fd);
+	    (void) mutex_unlock(&ulock);
+	    return (-1);
+	}
+	/*
+	 * Unlock system-wide lock
+	 */
+	_unlock_state(locked_state_fd);
+	(void) mutex_unlock(&ulock);
+	return (0);
+}
+
+/*
+ * Name:	gen_ethernet_address
+ *
+ * Description: Fills system_node with Ethernet address if available,
+ *		else fills random numbers
+ *
+ * Returns:	Nothing
+ */
+static void
+gen_ethernet_address(uuid_node_t *system_node)
+{
+	uchar_t		node[6];
+
+	if (get_ethernet_address(system_node) != 0) {
+		fill_random_bytes(node, 6);
+		(void) memcpy(system_node->nodeID, node, 6);
+		/*
+		 * use 8:0:20 with the multicast bit set
+		 * to avoid namespace collisions.
+		 */
+		system_node->nodeID[0] = 0x88;
+		system_node->nodeID[1] = 0x00;
+		system_node->nodeID[2] = 0x20;
+	}
+}
+
+/*
+ * Name:	_format_uuid
+ *
+ * Description: Formats a UUID, given the clock_seq timestamp,
+ * 		and node address.  Fills in passed-in pointer with
+ *		the resulting uuid.
+ *
+ * Returns:	None.
+ */
+static void
+_format_uuid(struct uuid *uuid, uint16_t clock_seq,
+    uuid_time_t timestamp, uuid_node_t node)
+{
+
+	/*
+	 * First set up the first 60 bits from the timestamp
+	 */
+	uuid->time_low = (uint32_t)(timestamp & 0xFFFFFFFF);
+	uuid->time_mid = (uint16_t)((timestamp >> 32) & 0xFFFF);
+	uuid->time_hi_and_version = (uint16_t)((timestamp >> 48) &
+	    0x0FFF);
+
+	/*
+	 * This is version 1, so say so in the UUID version field (4 bits)
+	 */
+	uuid->time_hi_and_version |= (1 << 12);
+
+	/*
+	 * Now do the clock sequence
+	 */
+	uuid->clock_seq_low = clock_seq & 0xFF;
+
+	/*
+	 * We must save the most-significant 2 bits for the reserved field
+	 */
+	uuid->clock_seq_hi_and_reserved = (clock_seq & 0x3F00) >> 8;
+
+	/*
+	 * The variant for this format is the 2 high bits set to 10,
+	 * so here it is
+	 */
+	uuid->clock_seq_hi_and_reserved |= 0x80;
+
+	/*
+	 * write result to passed-in pointer
+	 */
+	(void) memcpy(&uuid->node_addr, &node, sizeof (uuid->node_addr));
+}
+
+/*
+ * Name:	_read_state
+ *
+ * Description: Reads non-volatile state from a (possibly) saved statefile.
+ * 		For each non-null pointer passed-in, the corresponding
+ *		information from the statefile is filled in.
+ *		the resulting uuid.
+ *
+ * Returns:	Nothing.
+ */
+static void
+_read_state(int fd, uint16_t *clockseq,
+    uuid_time_t *timestamp, uuid_node_t *node)
+{
+	uuid_state_t	vol_state;
+
+	bzero(node, sizeof (uuid_node_t));
+	*timestamp = 0;
+	*clockseq = 0;
+
+	if (read(fd, &vol_state, sizeof (uuid_state_t)) <
+	    sizeof (uuid_state_t)) {
+		/* This file is being accessed the first time */
+	}
+
+	*node = vol_state.node;
+	*timestamp = vol_state.ts;
+	*clockseq = vol_state.cs;
+}
+
+
+/*
+ * Name:	_write_state
+ *
+ * Description: Writes non-volatile state from the passed-in information.
+ *
+ * Returns:	-1 on error, 0 otherwise.
+ */
+static int
+_write_state(int fd, uint16_t clockseq,
+    uuid_time_t timestamp, uuid_node_t node)
+{
+	uuid_state_t	vol_state;
+
+	vol_state.cs = clockseq;
+	vol_state.ts = timestamp;
+	vol_state.node = node;
+	/*
+	 * seek to beginning of file and write data
+	 */
+	if (lseek(fd, 0, SEEK_SET) != -1) {
+	    if (write(fd, &vol_state, sizeof (uuid_state_t)) != -1) {
+		return (0);
+	    }
+	}
+	return (-1);
+}
+
+
+
+/*
+ * Name:	_uuid_print
+ *
+ * Description:	Prints a nicely-formatted uuid to stdout.
+ *
+ * Returns:	None.
+ *
+ */
+void
+uuid_print(struct uuid u)
+{
+	int i;
+
+	(void) printf("%8.8x-%4.4x-%4.4x-%2.2x%2.2x-", u.time_low, u.time_mid,
+	    u.time_hi_and_version, u.clock_seq_hi_and_reserved,
+	    u.clock_seq_low);
+	for (i = 0; i < 6; i++)
+		(void) printf("%2.2x", u.node_addr[i]);
+	(void) printf("\n");
+}
+
+/*
+ * Name:	_lock_state
+ *
+ * Description:	Locks down the statefile, by first creating the file
+ *		if it doesn't exist.
+ *
+ * Returns:	A non-negative file descriptor referring to the locked
+ *		state file, if it was able to be created and/or locked,
+ *		or -1 otherwise.
+ */
+static int
+_lock_state(char *loc)
+{
+	int fd;
+	struct flock lock;
+
+	fd = open(loc, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR);
+
+	if (fd < 0) {
+		return (-1);
+	}
+
+	lock.l_type = F_WRLCK;
+	lock.l_start = 0;
+	lock.l_whence = SEEK_SET;
+	lock.l_len = 0;
+
+	if (fcntl(fd, F_SETLKW, &lock) == -1) {
+		/*
+		 * File could not be locked, bail
+		 */
+		(void) close(fd);
+		return (-1);
+	}
+	return (fd);
+}
+
+/*
+ * Name:	_unlock_state
+ *
+ * Description:	Unlocks a locked statefile, and close()'s the file.
+ *
+ * Returns:	Nothing.
+ */
+void
+_unlock_state(int fd)
+{
+	struct flock lock;
+
+	lock.l_type = F_UNLCK;
+	lock.l_start = 0;
+	lock.l_whence = SEEK_SET;
+	lock.l_len = 0;
+
+	(void) fcntl(fd, F_SETLK, &lock);
+	(void) close(fd);
+}
+
+/*
+ * Name:	fill_random_bytes
+ *
+ * Description:	fills buf with random numbers - nbytes is the number of bytes
+ *		to fill-in. Tries to use /dev/urandom random number generator-
+ *		if that fails for some reason, it retries MAX_RETRY times. If
+ *		it still fails then it uses srand48(3C)
+ *
+ * Returns:	Nothing.
+ */
+static void
+fill_random_bytes(uchar_t *buf, int nbytes)
+{
+	int i, fd, retries = 0;
+
+	fd = open(URANDOM_PATH, O_RDONLY);
+	if (fd >= 0) {
+	    while (nbytes > 0) {
+		i = read(fd, buf, nbytes);
+		if ((i < 0) && (errno == EINTR)) {
+		    continue;
+		}
+		if (i <= 0) {
+		    if (retries++ == MAX_RETRY)
+			break;
+		    continue;
+		}
+		nbytes -= i;
+		buf += i;
+		retries = 0;
+	    }
+	    if (nbytes == 0) {
+		(void) close(fd);
+		return;
+	    }
+	}
+	for (i = 0; i < nbytes; i++) {
+	    *buf++ = _get_random() & 0xFF;
+	}
+	if (fd >= 0) {
+	    (void) close(fd);
+	}
+}
+
+/*
+ * Name:	struct_to_string
+ *
+ * Description:	Unpacks the structure members in "struct uuid" to a char
+ *		string "uuid_t".
+ *
+ * Returns:	Nothing.
+ */
+void
+struct_to_string(uuid_t ptr, struct uuid *uu)
+{
+	uint_t		tmp;
+	uchar_t		*out = ptr;
+
+	tmp = uu->time_low;
+	out[3] = (uchar_t)tmp;
+	tmp >>= 8;
+	out[2] = (uchar_t)tmp;
+	tmp >>= 8;
+	out[1] = (uchar_t)tmp;
+	tmp >>= 8;
+	out[0] = (uchar_t)tmp;
+
+	tmp = uu->time_mid;
+	out[5] = (uchar_t)tmp;
+	tmp >>= 8;
+	out[4] = (uchar_t)tmp;
+
+	tmp = uu->time_hi_and_version;
+	out[7] = (uchar_t)tmp;
+	tmp >>= 8;
+	out[6] = (uchar_t)tmp;
+
+	tmp = uu->clock_seq_hi_and_reserved;
+	out[8] = (uchar_t)tmp;
+	tmp = uu->clock_seq_low;
+	out[9] = (uchar_t)tmp;
+
+	(void) memcpy(out+10, uu->node_addr, 6);
+
+}
+
+/*
+ * Name:	string_to_struct
+ *
+ * Description:	Packs the values in the "uuid_t" string into "struct uuid".
+ *
+ * Returns:	Nothing
+ */
+void
+string_to_struct(struct uuid *uuid, uuid_t in)
+{
+
+	uchar_t 	*ptr;
+	uint_t		tmp;
+
+	ptr = in;
+
+	tmp = *ptr++;
+	tmp = (tmp << 8) | *ptr++;
+	tmp = (tmp << 8) | *ptr++;
+	tmp = (tmp << 8) | *ptr++;
+	uuid->time_low = tmp;
+
+	tmp = *ptr++;
+	tmp = (tmp << 8) | *ptr++;
+	uuid->time_mid = tmp;
+
+	tmp = *ptr++;
+	tmp = (tmp << 8) | *ptr++;
+	uuid->time_hi_and_version = tmp;
+
+	tmp = *ptr++;
+	uuid->clock_seq_hi_and_reserved = tmp;
+
+	tmp = *ptr++;
+	uuid->clock_seq_low = tmp;
+
+	(void) memcpy(uuid->node_addr, ptr, 6);
+
+}
+
+/*
+ * Name:	uuid_generate_random
+ *
+ * Description:	Generates UUID based on DCE Version 4
+ *
+ * Returns:	Nothing. uu contains the newly generated UUID
+ */
+void
+uuid_generate_random(uuid_t uu)
+{
+
+	struct uuid	uuid;
+
+	if (uu == NULL)
+	    return;
+
+	(void) memset(uu, 0, sizeof (uuid_t));
+	(void) memset(&uuid, 0, sizeof (struct uuid));
+
+	fill_random_bytes(uu, sizeof (uuid_t));
+	string_to_struct(&uuid, uu);
+	/*
+	 * This is version 4, so say so in the UUID version field (4 bits)
+	 */
+	uuid.time_hi_and_version |= (1 << 14);
+	/*
+	 * we don't want the bit 1 to be set also which is for version 1
+	 */
+	uuid.time_hi_and_version &= VER1_MASK;
+
+	/*
+	 * The variant for this format is the 2 high bits set to 10,
+	 * so here it is
+	 */
+	uuid.clock_seq_hi_and_reserved |= 0x80;
+
+	/*
+	 * Set MSB of Ethernet address to 1 to indicate that it was generated
+	 * randomly
+	 */
+	uuid.node_addr[0] |= 0x80;
+	struct_to_string(uu, &uuid);
+}
+
+/*
+ * Name:	uuid_generate_time
+ *
+ * Description:	Generates UUID based on DCE Version 1.
+ *
+ * Returns:	Nothing. uu contains the newly generated UUID.
+ */
+void
+uuid_generate_time(uuid_t uu)
+{
+	struct uuid uuid;
+
+	if (uu == NULL)
+	    return;
+
+	if (uuid_create(&uuid) == -1) {
+	    uuid_generate_random(uu);
+	    return;
+	}
+	struct_to_string(uu, &uuid);
+}
+
+/*
+ * Name:	uuid_generate
+ *
+ * Description:	Creates a new UUID. The uuid will be generated based on
+ *		high-quality randomness from /dev/urandom, if available by
+ *		calling uuid_generate_random. If it failed to generate UUID
+ *		then uuid_generate will call uuid_generate_time.
+ *
+ * Returns:	Nothing. uu contains the newly generated UUID.
+ */
+void
+uuid_generate(uuid_t uu)
+{
+	int fd;
+
+	if (uu == NULL) {
+	    return;
+	}
+	fd = open(URANDOM_PATH, O_RDONLY);
+	if (fd >= 0) {
+	    (void) close(fd);
+	    uuid_generate_random(uu);
+	} else {
+	    (void) uuid_generate_time(uu);
+	}
+}
+
+/*
+ * Name:	uuid_copy
+ *
+ * Description:	The uuid_copy function copies the UUID variable src to dst
+ *
+ * Returns:	Nothing
+ */
+void
+uuid_copy(uuid_t dst, uuid_t src)
+{
+
+	(void) memcpy(dst, src, UUID_LEN);
+}
+
+/*
+ * Name:	uuid_clear
+ *
+ * Description:	The uuid_clear function sets the value of the supplied uuid
+ *		variable uu, to the NULL value.
+ *
+ * Returns:	Nothing
+ */
+void
+uuid_clear(uuid_t uu)
+{
+	(void) memset(uu, 0, UUID_LEN);
+}
+
+/*
+ * Name:	uuid_unparse
+ *
+ * Description:	This function converts the supplied UUID uu from the internal
+ *		binary format into a 36-byte string (plus trailing null char)
+ *		and stores this value in the character string pointed to by out
+ *
+ * Returns:	Nothing.
+ */
+void
+uuid_unparse(uuid_t uu, char *out)
+{
+	struct uuid 	uuid;
+	uint16_t	clock_seq;
+	char		etheraddr[13];
+	int		index = 0, i;
+
+	/* basic sanity checking */
+	if (uu == NULL) {
+	    return;
+	}
+
+	/* XXX user should have allocated enough memory */
+	/*
+	 * if (strlen(out) < UUID_PRINTF_SIZE) {
+	 * return;
+	 * }
+	 */
+	string_to_struct(&uuid, uu);
+	clock_seq = uuid.clock_seq_hi_and_reserved;
+	clock_seq = (clock_seq  << 8) | uuid.clock_seq_low;
+	for (i = 0; i < 6; i++) {
+	    (void) sprintf(&etheraddr[index++], "%.2x", uuid.node_addr[i]);
+	    index++;
+	}
+	etheraddr[index] = '\0';
+
+	(void) snprintf(out, 25, "%08x-%04x-%04x-%04x-",
+	    uuid.time_low, uuid.time_mid, uuid.time_hi_and_version,
+		clock_seq);
+	(void) strlcat(out, etheraddr, UUID_PRINTF_SIZE);
+}
+
+/*
+ * Name:	uuid_is_null
+ *
+ * Description:	The uuid_is_null function compares the value of the supplied
+ *		UUID variable uu to the NULL value. If the value is equal
+ *		to the NULL UUID, 1 is returned, otherwise 0 is returned.
+ *
+ * Returns:	0 if uu is NOT null, 1 if uu is NULL.
+ */
+int
+uuid_is_null(uuid_t uu)
+{
+	int		i;
+	uuid_t		null_uu;
+
+	(void) memset(null_uu, 0, sizeof (uuid_t));
+	i = memcmp(uu, null_uu, sizeof (uuid_t));
+	if (i == 0) {
+	/* uu is NULL uuid */
+	    return (1);
+	} else {
+	    return (0);
+	}
+}
+
+/*
+ * Name:	uuid_parse
+ *
+ * Description:	uuid_parse converts the UUID string given by 'in' into the
+ *		internal uuid_t format. The input UUID is a string of the form
+ *		cefa7a9c-1dd2-11b2-8350-880020adbeef in printf(3C) format.
+ *		Upon successfully parsing the input string, UUID is stored
+ *		in the location pointed to by uu
+ *
+ * Returns:	0 if the UUID is successfully stored, -1 otherwise.
+ */
+int
+uuid_parse(char *in, uuid_t uu)
+{
+
+	char		*ptr, buf[3];
+	int		i;
+	struct uuid	uuid;
+	uint16_t	clock_seq;
+
+	/* do some sanity checking */
+	if ((strlen(in) != 36) || (uu == NULL) || (in[36] != '\0')) {
+	    return (-1);
+	}
+
+	ptr = in;
+	for (i = 0; i < 36; i++, ptr++) {
+	    if ((i == 8) || (i == 13) || (i == 18) || (i == 23)) {
+		if (*ptr != '-') {
+		    return (-1);
+		}
+	    } else {
+		if (!isxdigit(*ptr)) {
+		    return (-1);
+		}
+	    }
+	}
+
+	uuid.time_low = strtoul(in, NULL, 16);
+	uuid.time_mid = strtoul(in+9, NULL, 16);
+	uuid.time_hi_and_version = strtoul(in+14, NULL, 16);
+	clock_seq = strtoul(in+19, NULL, 16);
+	uuid.clock_seq_hi_and_reserved = (clock_seq & 0xFF00) >> 8;
+	uuid.clock_seq_low = (clock_seq & 0xFF);
+
+	ptr = in+24;
+	buf[2] = '\0';
+	for (i = 0; i < 6; i++) {
+	    buf[0] = *ptr++;
+	    buf[1] = *ptr++;
+	    uuid.node_addr[i] = strtoul(buf, NULL, 16);
+	}
+	struct_to_string(uu, &uuid);
+	return (0);
+}
+
+/*
+ * Name:	uuid_time
+ *
+ * Description:	uuid_time extracts the time at which the supplied UUID uu
+ *		was created. This function can only extract the creation
+ *		time for UUIDs created with the uuid_generate_time function.
+ *		The time at which the UUID was created, in seconds and
+ *		microseconds since the epoch is stored in the location
+ *		pointed to by ret_tv.
+ *
+ * Returns:	The time at which the UUID was created, in seconds since
+ *		January  1, 1970 GMT (the epoch). -1 otherwise.
+ */
+time_t
+uuid_time(uuid_t uu, struct timeval *ret_tv)
+{
+	struct uuid	uuid;
+	uint_t		high;
+	struct timeval	tv;
+	u_longlong_t	clock_reg;
+	uint_t		tmp;
+	uint8_t		clk;
+
+	string_to_struct(&uuid, uu);
+	tmp = (uuid.time_hi_and_version & 0xF000) >> 12;
+	clk = uuid.clock_seq_hi_and_reserved;
+
+	/* check if uu is NULL, Version = 1 of DCE and Variant = 0b10x */
+	if ((uu == NULL) || ((tmp & 0x01) != 0x01) || ((clk & 0x80) != 0x80)) {
+	    return (-1);
+	}
+	high = uuid.time_mid | ((uuid.time_hi_and_version & 0xFFF) << 16);
+	clock_reg = uuid.time_low | ((u_longlong_t)high << 32);
+
+	clock_reg -= (((u_longlong_t)0x01B21DD2) << 32) + 0x13814000;
+	tv.tv_sec = clock_reg / 10000000;
+	tv.tv_usec = (clock_reg % 10000000) / 10;
+
+	if (ret_tv) {
+	    *ret_tv = tv;
+	}
+
+	return (tv.tv_sec);
+}