xref: /illumos-gate/usr/src/uts/common/sys/lockfs.h (revision 2d6eb4a5)
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 #ifdef	__cplusplus
31 extern "C" {
32 #endif
33 
34 #ifdef _SYSCALL32
35 /*
36  * ILP32 version of lockfs, used in ufs_ioctl() to support 32-bit app in
37  * LP64 kernel
38  */
39 struct lockfs32 {
40 	uint32_t	lf_lock;	/* desired lock */
41 	uint32_t	lf_flags;	/* misc flags */
42 	uint32_t	lf_key;		/* lock key */
43 	uint32_t	lf_comlen;	/* length of comment */
44 	uint32_t	lf_comment;	/* address of comment */
45 };
46 #endif /* _SYSCALL32 */
47 
48 struct lockfs {
49 	ulong_t		lf_lock;	/* desired lock */
50 	ulong_t		lf_flags;	/* misc flags */
51 	ulong_t		lf_key;		/* lock key */
52 	ulong_t		lf_comlen;	/* length of comment */
53 	caddr_t		lf_comment;	/* address of comment */
54 };
55 
56 /*
57  * lf_lock and lf_locking
58  */
59 #define	LOCKFS_ULOCK	0	/* unlock */
60 #define	LOCKFS_WLOCK	1	/* write  lock */
61 #define	LOCKFS_NLOCK	2	/* name   lock */
62 #define	LOCKFS_DLOCK	3	/* delete lock */
63 #define	LOCKFS_HLOCK	4	/* hard   lock */
64 #define	LOCKFS_ELOCK	5	/* error  lock */
65 #define	LOCKFS_ROELOCK	6	/* error  lock (read-only) - unimplemented */
66 #define	LOCKFS_MAXLOCK	6	/* maximum lock number */
67 
68 /*
69  * lf_flags
70  */
71 #define	LOCKFS_BUSY	0x00000001	/* lock is being set */
72 #define	LOCKFS_MOD	0x00000002	/* file system modified */
73 
74 #define	LOCKFS_MAXCOMMENTLEN	1024	/* maximum comment length */
75 
76 /*
77  * some nice checking macros
78  */
79 
80 #define	LOCKFS_IS_BUSY(LF)	((LF)->lf_flags & LOCKFS_BUSY)
81 #define	LOCKFS_IS_MOD(LF)	((LF)->lf_flags & LOCKFS_MOD)
82 
83 #define	LOCKFS_CLR_BUSY(LF)	((LF)->lf_flags &= ~LOCKFS_BUSY)
84 #define	LOCKFS_CLR_MOD(LF)	((LF)->lf_flags &= ~LOCKFS_MOD)
85 
86 #define	LOCKFS_SET_MOD(LF)	((LF)->lf_flags |= LOCKFS_MOD)
87 #define	LOCKFS_SET_BUSY(LF)	((LF)->lf_flags |= LOCKFS_BUSY)
88 
89 #define	LOCKFS_IS_WLOCK(LF)	((LF)->lf_lock == LOCKFS_WLOCK)
90 #define	LOCKFS_IS_HLOCK(LF)	((LF)->lf_lock == LOCKFS_HLOCK)
91 #define	LOCKFS_IS_ROELOCK(LF)	((LF)->lf_lock == LOCKFS_ROELOCK)
92 #define	LOCKFS_IS_ELOCK(LF)	((LF)->lf_lock == LOCKFS_ELOCK)
93 #define	LOCKFS_IS_ULOCK(LF)	((LF)->lf_lock == LOCKFS_ULOCK)
94 #define	LOCKFS_IS_NLOCK(LF)	((LF)->lf_lock == LOCKFS_NLOCK)
95 #define	LOCKFS_IS_DLOCK(LF)	((LF)->lf_lock == LOCKFS_DLOCK)
96 
97 #ifdef	__cplusplus
98 }
99 #endif
100 
101 #endif	/* _SYS_LOCKFS_H */
102