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[apple/xnu.git] / bsd / miscfs / specfs / specdev.h
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A		 1/*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * The contents of this file constitute Original Code as defined in and
7 * are subject to the Apple Public Source License Version 1.1 (the
8 * "License"). You may not use this file except in compliance with the
9 * License. Please obtain a copy of the License at
10 * http://www.apple.com/publicsource and read it before using this file.
11 *
12 * This Original Code and all software distributed under the License are
13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17 * License for the specific language governing rights and limitations
18 * under the License.
19 *
20 * @APPLE_LICENSE_HEADER_END@
21 */
22/*
23 * Copyright (c) 1995, 1998 Apple Computer, Inc. All Rights Reserved.
24 * Copyright (c) 1990, 1993
25 * The Regents of the University of California. All rights reserved.
26 *
27 * Redistribution and use in source and binary forms, with or without
28 * modification, are permitted provided that the following conditions
29 * are met:
30 * 1. Redistributions of source code must retain the above copyright
31 * notice, this list of conditions and the following disclaimer.
32 * 2. Redistributions in binary form must reproduce the above copyright
33 * notice, this list of conditions and the following disclaimer in the
34 * documentation and/or other materials provided with the distribution.
35 * 3. All advertising materials mentioning features or use of this software
36 * must display the following acknowledgement:
37 * This product includes software developed by the University of
38 * California, Berkeley and its contributors.
39 * 4. Neither the name of the University nor the names of its contributors
40 * may be used to endorse or promote products derived from this software
41 * without specific prior written permission.
42 *
43 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * SUCH DAMAGE.
54 *
55 * @(#)specdev.h 8.6 (Berkeley) 5/21/95
56 */
57
58#ifndef _MISCFS_SPECFS_SPECDEV_H_
59#define _MISCFS_SPECFS_SPECDEV_H_
60
61#include <vfs/vfs_support.h>
62
63/*
64 * This structure defines the information maintained about
65 * special devices. It is allocated in checkalias and freed
66 * in vgone.
67 */
68struct specinfo {
69 struct vnode **si_hashchain;
70 struct vnode *si_specnext;
71 long si_flags;
72 dev_t si_rdev;
73 daddr_t si_size; /* block device size in bytes */
74};
75/*
76 * Exported shorthand
77 */
78#define v_rdev v_specinfo->si_rdev
79#define v_hashchain v_specinfo->si_hashchain
80#define v_specnext v_specinfo->si_specnext
81#define v_specflags v_specinfo->si_flags
82#define v_specsize v_specinfo->si_size
83
84/*
85 * Flags for specinfo
86 */
87#define SI_MOUNTEDON 0x0001 /* block special device is mounted on */
88
89/*
90 * Special device management
91 */
92#define SPECHSZ 64
93#if ((SPECHSZ&(SPECHSZ-1)) == 0)
94#define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1))
95#else
96#define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
97#endif
98
99extern struct vnode *speclisth[SPECHSZ];
100
101/*
102 * Prototypes for special file operations on vnodes.
103 */
104extern int (**spec_vnodeop_p)(void *);
105struct nameidata;
106struct componentname;
107struct ucred;
108struct flock;
109struct buf;
110struct uio;
111
112int spec_ebadf();
113
114int spec_lookup __P((struct vop_lookup_args *));
115#define spec_create ((int (*) __P((struct vop_access_args *)))err_create)
116#define spec_mknod ((int (*) __P((struct vop_access_args *)))err_mknod)
117int spec_open __P((struct vop_open_args *));
118int spec_close __P((struct vop_close_args *));
119#define spec_access ((int (*) __P((struct vop_access_args *)))spec_ebadf)
120#define spec_getattr ((int (*) __P((struct vop_getattr_args *)))spec_ebadf)
121#define spec_setattr ((int (*) __P((struct vop_setattr_args *)))spec_ebadf)
122int spec_read __P((struct vop_read_args *));
123int spec_write __P((struct vop_write_args *));
124#define spec_lease_check ((int (*) __P((struct vop_access_args *)))nop_lease)
125int spec_ioctl __P((struct vop_ioctl_args *));
126int spec_select __P((struct vop_select_args *));
127#define spec_revoke ((int (*) __P((struct vop_access_args *)))nop_revoke)
128#define spec_mmap ((int (*) __P((struct vop_access_args *)))err_mmap)
129int spec_fsync __P((struct vop_fsync_args *));
130#define spec_seek ((int (*) __P((struct vop_access_args *)))err_seek)
131#define spec_remove ((int (*) __P((struct vop_access_args *)))err_remove)
132#define spec_link ((int (*) __P((struct vop_access_args *)))err_link)
133#define spec_rename ((int (*) __P((struct vop_access_args *)))err_rename)
134#define spec_mkdir ((int (*) __P((struct vop_access_args *)))err_mkdir)
135#define spec_rmdir ((int (*) __P((struct vop_access_args *)))err_rmdir)
136#define spec_symlink ((int (*) __P((struct vop_access_args *)))err_symlink)
137#define spec_readdir ((int (*) __P((struct vop_access_args *)))err_readdir)
138#define spec_readlink ((int (*) __P((struct vop_access_args *)))err_readlink)
139#define spec_abortop ((int (*) __P((struct vop_access_args *)))err_abortop)
140#define spec_inactive ((int (*) __P((struct vop_access_args *)))nop_inactive)
141#define spec_reclaim ((int (*) __P((struct vop_access_args *)))nop_reclaim)
142#define spec_lock ((int (*) __P((struct vop_access_args *)))nop_lock)
143#define spec_unlock ((int (*) __P((struct vop_access_args *)))nop_unlock)
144int spec_bmap __P((struct vop_bmap_args *));
145int spec_strategy __P((struct vop_strategy_args *));
146int spec_print __P((struct vop_print_args *));
147#define spec_islocked ((int (*) __P((struct vop_access_args *)))nop_islocked)
148int spec_pathconf __P((struct vop_pathconf_args *));
149#define spec_advlock ((int (*) __P((struct vop_access_args *)))err_advlock)
150#define spec_blkatoff ((int (*) __P((struct vop_access_args *)))err_blkatoff)
151#define spec_valloc ((int (*) __P((struct vop_access_args *)))err_valloc)
152#define spec_vfree ((int (*) __P((struct vop_access_args *)))err_vfree)
153#define spec_truncate ((int (*) __P((struct vop_access_args *)))nop_truncate)
154#define spec_update ((int (*) __P((struct vop_access_args *)))nop_update)
155#define spec_reallocblks \
156 ((int (*) __P((struct vop_reallocblks_args *)))err_reallocblks)
157#define spec_bwrite ((int (*) __P((struct vop_bwrite_args *)))nop_bwrite)
158int spec_devblocksize __P((struct vop_devblocksize_args *));
159int spec_blktooff __P((struct vop_blktooff_args *));
160int spec_offtoblk __P((struct vop_offtoblk_args *));
161int spec_cmap __P((struct vop_cmap_args *));
162
163#endif /* _MISCFS_SPECFS_SPECDEV_H_ */
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