1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 1998 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#ifndef _SYS_LOCKFS_H
28#define	_SYS_LOCKFS_H
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32#ifdef	__cplusplus
33extern "C" {
34#endif
35
36#ifdef _SYSCALL32
37/*
38 * ILP32 version of lockfs, used in ufs_ioctl() to support 32-bit app in
39 * LP64 kernel
40 */
41struct lockfs32 {
42	uint32_t	lf_lock;	/* desired lock */
43	uint32_t	lf_flags;	/* misc flags */
44	uint32_t	lf_key;		/* lock key */
45	uint32_t	lf_comlen;	/* length of comment */
46	uint32_t	lf_comment;	/* address of comment */
47};
48#endif /* _SYSCALL32 */
49
50struct lockfs {
51	ulong_t		lf_lock;	/* desired lock */
52	ulong_t		lf_flags;	/* misc flags */
53	ulong_t		lf_key;		/* lock key */
54	ulong_t		lf_comlen;	/* length of comment */
55	caddr_t		lf_comment;	/* address of comment */
56};
57
58/*
59 * lf_lock and lf_locking
60 */
61#define	LOCKFS_ULOCK	0	/* unlock */
62#define	LOCKFS_WLOCK	1	/* write  lock */
63#define	LOCKFS_NLOCK	2	/* name   lock */
64#define	LOCKFS_DLOCK	3	/* delete lock */
65#define	LOCKFS_HLOCK	4	/* hard   lock */
66#define	LOCKFS_ELOCK	5	/* error  lock */
67#define	LOCKFS_ROELOCK	6	/* error  lock (read-only) - unimplemented */
68#define	LOCKFS_MAXLOCK	6	/* maximum lock number */
69
70/*
71 * lf_flags
72 */
73#define	LOCKFS_BUSY	0x00000001	/* lock is being set */
74#define	LOCKFS_MOD	0x00000002	/* file system modified */
75
76#define	LOCKFS_MAXCOMMENTLEN	1024	/* maximum comment length */
77
78/*
79 * some nice checking macros
80 */
81
82#define	LOCKFS_IS_BUSY(LF)	((LF)->lf_flags & LOCKFS_BUSY)
83#define	LOCKFS_IS_MOD(LF)	((LF)->lf_flags & LOCKFS_MOD)
84
85#define	LOCKFS_CLR_BUSY(LF)	((LF)->lf_flags &= ~LOCKFS_BUSY)
86#define	LOCKFS_CLR_MOD(LF)	((LF)->lf_flags &= ~LOCKFS_MOD)
87
88#define	LOCKFS_SET_MOD(LF)	((LF)->lf_flags |= LOCKFS_MOD)
89#define	LOCKFS_SET_BUSY(LF)	((LF)->lf_flags |= LOCKFS_BUSY)
90
91#define	LOCKFS_IS_WLOCK(LF)	((LF)->lf_lock == LOCKFS_WLOCK)
92#define	LOCKFS_IS_HLOCK(LF)	((LF)->lf_lock == LOCKFS_HLOCK)
93#define	LOCKFS_IS_ROELOCK(LF)	((LF)->lf_lock == LOCKFS_ROELOCK)
94#define	LOCKFS_IS_ELOCK(LF)	((LF)->lf_lock == LOCKFS_ELOCK)
95#define	LOCKFS_IS_ULOCK(LF)	((LF)->lf_lock == LOCKFS_ULOCK)
96#define	LOCKFS_IS_NLOCK(LF)	((LF)->lf_lock == LOCKFS_NLOCK)
97#define	LOCKFS_IS_DLOCK(LF)	((LF)->lf_lock == LOCKFS_DLOCK)
98
99#ifdef	__cplusplus
100}
101#endif
102
103#endif	/* _SYS_LOCKFS_H */
104