xref: /netbsd-src/sys/miscfs/specfs/specdev.h (revision 2a399c6883d870daece976daec6ffa7bb7f934ce)
1 /*	$NetBSD: specdev.h,v 1.16 1997/04/11 21:52:05 kleink Exp $	*/
2 
3 /*
4  * Copyright (c) 1990, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. All advertising materials mentioning features or use of this software
16  *    must display the following acknowledgement:
17  *	This product includes software developed by the University of
18  *	California, Berkeley and its contributors.
19  * 4. Neither the name of the University nor the names of its contributors
20  *    may be used to endorse or promote products derived from this software
21  *    without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  *
35  *	@(#)specdev.h	8.3 (Berkeley) 8/10/94
36  */
37 
38 /*
39  * This structure defines the information maintained about
40  * special devices. It is allocated in checkalias and freed
41  * in vgone.
42  */
43 struct specinfo {
44 	struct	vnode **si_hashchain;
45 	struct	vnode *si_specnext;
46 	long	si_flags;
47 	dev_t	si_rdev;
48 	struct	lockf *si_lockf;
49 };
50 /*
51  * Exported shorthand
52  */
53 #define v_rdev		v_specinfo->si_rdev
54 #define v_hashchain	v_specinfo->si_hashchain
55 #define v_specnext	v_specinfo->si_specnext
56 #define v_specflags	v_specinfo->si_flags
57 #define v_speclockf	v_specinfo->si_lockf
58 
59 /*
60  * Flags for specinfo
61  */
62 #define	SI_MOUNTEDON	0x0001	/* block special device is mounted on */
63 
64 /*
65  * Special device management
66  */
67 #define	SPECHSZ	64
68 #if	((SPECHSZ&(SPECHSZ-1)) == 0)
69 #define	SPECHASH(rdev)	(((rdev>>5)+(rdev))&(SPECHSZ-1))
70 #else
71 #define	SPECHASH(rdev)	(((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
72 #endif
73 
74 struct vnode *speclisth[SPECHSZ];
75 
76 /*
77  * Prototypes for special file operations on vnodes.
78  */
79 extern	int (**spec_vnodeop_p) __P((void *));
80 struct	nameidata;
81 struct	componentname;
82 struct	ucred;
83 struct	flock;
84 struct	buf;
85 struct	uio;
86 
87 int	spec_lookup	__P((void *));
88 #define	spec_create	genfs_badop
89 #define	spec_mknod	genfs_badop
90 int	spec_open	__P((void *));
91 int	spec_close	__P((void *));
92 #define	spec_access	genfs_ebadf
93 #define	spec_getattr	genfs_ebadf
94 #define	spec_setattr	genfs_ebadf
95 int	spec_read	__P((void *));
96 int	spec_write	__P((void *));
97 #define	spec_lease_check genfs_nullop
98 int	spec_ioctl	__P((void *));
99 int	spec_poll	__P((void *));
100 #define	spec_mmap	genfs_badop
101 int	spec_fsync	__P((void *));
102 #define	spec_seek	genfs_nullop		/* XXX should query device */
103 #define	spec_remove	genfs_badop
104 #define	spec_link	genfs_badop
105 #define	spec_rename	genfs_badop
106 #define	spec_mkdir	genfs_badop
107 #define	spec_rmdir	genfs_badop
108 #define	spec_symlink	genfs_badop
109 #define	spec_readdir	genfs_badop
110 #define	spec_readlink	genfs_badop
111 #define	spec_abortop	genfs_badop
112 #define	spec_inactive	genfs_nullop
113 #define	spec_reclaim	genfs_nullop
114 int	spec_lock	__P((void *));
115 int	spec_unlock	__P((void *));
116 int	spec_bmap	__P((void *));
117 int	spec_strategy	__P((void *));
118 int	spec_print	__P((void *));
119 #define	spec_islocked	genfs_nullop
120 int	spec_pathconf	__P((void *));
121 int	spec_advlock	__P((void *));
122 #define	spec_blkatoff	genfs_badop
123 #define	spec_valloc	genfs_badop
124 #define	spec_reallocblks genfs_badop
125 #define	spec_vfree	genfs_badop
126 #define	spec_truncate	genfs_nullop
127 #define	spec_update	genfs_nullop
128 #define	spec_bwrite	vn_bwrite
129