17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*7257d1b4Sraf * Common Development and Distribution License (the "License").
6*7257d1b4Sraf * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate *
87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate * and limitations under the License.
127c478bd9Sstevel@tonic-gate *
137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate *
197c478bd9Sstevel@tonic-gate * CDDL HEADER END
207c478bd9Sstevel@tonic-gate */
21*7257d1b4Sraf
227c478bd9Sstevel@tonic-gate /*
23*7257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
247c478bd9Sstevel@tonic-gate * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate */
267c478bd9Sstevel@tonic-gate
277c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */
287c478bd9Sstevel@tonic-gate /* All Rights Reserved */
297c478bd9Sstevel@tonic-gate
30*7257d1b4Sraf #include "lint.h"
317c478bd9Sstevel@tonic-gate #include <sys/types.h>
327c478bd9Sstevel@tonic-gate #include <sys/mkdev.h>
337c478bd9Sstevel@tonic-gate #include <errno.h>
347c478bd9Sstevel@tonic-gate
357c478bd9Sstevel@tonic-gate /*
367c478bd9Sstevel@tonic-gate * Create a formatted device number
377c478bd9Sstevel@tonic-gate */
387c478bd9Sstevel@tonic-gate dev_t
__makedev(const int version,const major_t majdev,const minor_t mindev)397c478bd9Sstevel@tonic-gate __makedev(const int version, const major_t majdev, const minor_t mindev)
407c478bd9Sstevel@tonic-gate {
417c478bd9Sstevel@tonic-gate dev_t devnum;
427c478bd9Sstevel@tonic-gate switch (version) {
437c478bd9Sstevel@tonic-gate case OLDDEV:
447c478bd9Sstevel@tonic-gate if (majdev > OMAXMAJ || mindev > OMAXMIN) {
457c478bd9Sstevel@tonic-gate errno = EINVAL;
467c478bd9Sstevel@tonic-gate return ((o_dev_t)NODEV);
477c478bd9Sstevel@tonic-gate }
487c478bd9Sstevel@tonic-gate devnum = ((majdev << ONBITSMINOR) | mindev);
497c478bd9Sstevel@tonic-gate break;
507c478bd9Sstevel@tonic-gate
517c478bd9Sstevel@tonic-gate case NEWDEV:
527c478bd9Sstevel@tonic-gate #if MAXMAJ != 0xfffffffful /* assumes major_t == uint32_t */
537c478bd9Sstevel@tonic-gate if (majdev > MAXMAJ) {
547c478bd9Sstevel@tonic-gate errno = EINVAL;
557c478bd9Sstevel@tonic-gate return (NODEV);
567c478bd9Sstevel@tonic-gate }
577c478bd9Sstevel@tonic-gate #endif
587c478bd9Sstevel@tonic-gate #if MAXMIN != 0xfffffffful /* assumes minor_t == uint32_t */
597c478bd9Sstevel@tonic-gate if (mindev > MAXMIN) {
607c478bd9Sstevel@tonic-gate errno = EINVAL;
617c478bd9Sstevel@tonic-gate return (NODEV);
627c478bd9Sstevel@tonic-gate }
637c478bd9Sstevel@tonic-gate #endif
647c478bd9Sstevel@tonic-gate if ((devnum = (((dev_t)majdev << NBITSMINOR) |
657c478bd9Sstevel@tonic-gate mindev)) == NODEV) {
667c478bd9Sstevel@tonic-gate errno = EINVAL;
677c478bd9Sstevel@tonic-gate return (NODEV);
687c478bd9Sstevel@tonic-gate }
697c478bd9Sstevel@tonic-gate break;
707c478bd9Sstevel@tonic-gate
717c478bd9Sstevel@tonic-gate default:
727c478bd9Sstevel@tonic-gate errno = EINVAL;
737c478bd9Sstevel@tonic-gate return (NODEV);
747c478bd9Sstevel@tonic-gate }
757c478bd9Sstevel@tonic-gate
767c478bd9Sstevel@tonic-gate return (devnum);
777c478bd9Sstevel@tonic-gate }
787c478bd9Sstevel@tonic-gate
797c478bd9Sstevel@tonic-gate /*
807c478bd9Sstevel@tonic-gate * Return major number part of formatted device number
817c478bd9Sstevel@tonic-gate */
827c478bd9Sstevel@tonic-gate major_t
__major(const int version,const dev_t devnum)837c478bd9Sstevel@tonic-gate __major(const int version, const dev_t devnum)
847c478bd9Sstevel@tonic-gate {
857c478bd9Sstevel@tonic-gate major_t maj;
867c478bd9Sstevel@tonic-gate
877c478bd9Sstevel@tonic-gate switch (version) {
887c478bd9Sstevel@tonic-gate case OLDDEV:
897c478bd9Sstevel@tonic-gate maj = (devnum >> ONBITSMINOR);
907c478bd9Sstevel@tonic-gate if (devnum == NODEV || maj > OMAXMAJ) {
917c478bd9Sstevel@tonic-gate errno = EINVAL;
927c478bd9Sstevel@tonic-gate return ((major_t)NODEV);
937c478bd9Sstevel@tonic-gate }
947c478bd9Sstevel@tonic-gate break;
957c478bd9Sstevel@tonic-gate
967c478bd9Sstevel@tonic-gate case NEWDEV:
977c478bd9Sstevel@tonic-gate maj = (devnum >> NBITSMINOR);
987c478bd9Sstevel@tonic-gate if (devnum == NODEV) {
997c478bd9Sstevel@tonic-gate errno = EINVAL;
1007c478bd9Sstevel@tonic-gate return ((major_t)NODEV);
1017c478bd9Sstevel@tonic-gate }
1027c478bd9Sstevel@tonic-gate #if MAXMAJ != 0xfffffffful /* assumes major_t == uint32_t */
1037c478bd9Sstevel@tonic-gate if (maj > MAXMAJ) {
1047c478bd9Sstevel@tonic-gate errno = EINVAL;
1057c478bd9Sstevel@tonic-gate return ((major_t)NODEV);
1067c478bd9Sstevel@tonic-gate }
1077c478bd9Sstevel@tonic-gate #endif
1087c478bd9Sstevel@tonic-gate break;
1097c478bd9Sstevel@tonic-gate
1107c478bd9Sstevel@tonic-gate default:
1117c478bd9Sstevel@tonic-gate errno = EINVAL;
1127c478bd9Sstevel@tonic-gate return ((major_t)NODEV);
1137c478bd9Sstevel@tonic-gate }
1147c478bd9Sstevel@tonic-gate
1157c478bd9Sstevel@tonic-gate return (maj);
1167c478bd9Sstevel@tonic-gate }
1177c478bd9Sstevel@tonic-gate
1187c478bd9Sstevel@tonic-gate
1197c478bd9Sstevel@tonic-gate /*
1207c478bd9Sstevel@tonic-gate * Return minor number part of formatted device number
1217c478bd9Sstevel@tonic-gate */
1227c478bd9Sstevel@tonic-gate minor_t
__minor(const int version,const dev_t devnum)1237c478bd9Sstevel@tonic-gate __minor(const int version, const dev_t devnum)
1247c478bd9Sstevel@tonic-gate {
1257c478bd9Sstevel@tonic-gate switch (version) {
1267c478bd9Sstevel@tonic-gate case OLDDEV:
1277c478bd9Sstevel@tonic-gate if (devnum == NODEV) {
1287c478bd9Sstevel@tonic-gate errno = EINVAL;
1297c478bd9Sstevel@tonic-gate return ((minor_t)NODEV);
1307c478bd9Sstevel@tonic-gate }
1317c478bd9Sstevel@tonic-gate return (devnum & OMAXMIN);
1327c478bd9Sstevel@tonic-gate
1337c478bd9Sstevel@tonic-gate case NEWDEV:
1347c478bd9Sstevel@tonic-gate if (devnum == NODEV) {
1357c478bd9Sstevel@tonic-gate errno = EINVAL;
1367c478bd9Sstevel@tonic-gate return ((minor_t)NODEV);
1377c478bd9Sstevel@tonic-gate }
1387c478bd9Sstevel@tonic-gate return (devnum & MAXMIN);
1397c478bd9Sstevel@tonic-gate
1407c478bd9Sstevel@tonic-gate default:
1417c478bd9Sstevel@tonic-gate errno = EINVAL;
1427c478bd9Sstevel@tonic-gate return ((minor_t)NODEV);
1437c478bd9Sstevel@tonic-gate }
1447c478bd9Sstevel@tonic-gate }
145