1/*
2 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * Copyright (c) 1995, 1998 Apple Computer, Inc. All Rights Reserved.
30 * Copyright (c) 1990, 1993
31 * The Regents of the University of California. All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. All advertising materials mentioning features or use of this software
42 * must display the following acknowledgement:
43 * This product includes software developed by the University of
44 * California, Berkeley and its contributors.
45 * 4. Neither the name of the University nor the names of its contributors
46 * may be used to endorse or promote products derived from this software
47 * without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 * SUCH DAMAGE.
60 *
61 * @(#)specdev.h 8.6 (Berkeley) 5/21/95
62 */
63
64#ifndef _MISCFS_SPECFS_SPECDEV_H_
65#define _MISCFS_SPECFS_SPECDEV_H_
66
67#include <sys/appleapiopts.h>
68
69#ifdef __APPLE_API_PRIVATE
70#include <vfs/vfs_support.h>
71
72/*
73 * This structure defines the information maintained about
74 * special devices. It is allocated in checkalias and freed
75 * in vgone.
76 */
77struct specinfo {
78 struct vnode **si_hashchain;
79 struct vnode *si_specnext;
80 long si_flags;
81 dev_t si_rdev;
82 int32_t si_opencount;
83 daddr_t si_size; /* device block size in bytes */
84 daddr64_t si_lastr; /* last read blkno (read-ahead) */
85 u_int64_t si_devsize; /* actual device size in bytes */
86
87 u_int8_t si_initted;
88 u_int8_t si_throttleable;
89 u_int16_t si_isssd;
90 u_int32_t si_devbsdunit;
91 u_int64_t si_throttle_mask;
92};
93/*
94 * Exported shorthand
95 */
96#define v_rdev v_specinfo->si_rdev
97#define v_hashchain v_specinfo->si_hashchain
98#define v_specnext v_specinfo->si_specnext
99#define v_specflags v_specinfo->si_flags
100#define v_specsize v_specinfo->si_size
101#define v_specdevsize v_specinfo->si_devsize
102#define v_speclastr v_specinfo->si_lastr
103
104/*
105 * Flags for specinfo
106 */
107#define SI_MOUNTEDON 0x0001 /* block special device is mounted on */
108#define SI_ALIASED 0x0002 /* multiple active vnodes refer to this device */
109
110/*
111 * Special device management
112 */
113#define SPECHSZ 64
114#if ((SPECHSZ&(SPECHSZ-1)) == 0)
115#define SPECHASH(rdev) (((rdev>>21)+(rdev))&(SPECHSZ-1))
116#else
117#define SPECHASH(rdev) (((unsigned)((rdev>>21)+(rdev)))%SPECHSZ)
118#endif
119
120extern struct vnode *speclisth[SPECHSZ];
121
122/*
123 * Prototypes for special file operations on vnodes.
124 */
125extern int (**spec_vnodeop_p)(void *);
126struct nameidata;
127struct componentname;
128struct flock;
129struct buf;
130struct uio;
131
132__BEGIN_DECLS
133#ifdef BSD_KERNEL_PRIVATE
134int spec_blktooff (struct vnop_blktooff_args *);
135int spec_offtoblk (struct vnop_offtoblk_args *);
136int spec_fsync_internal (vnode_t, int, vfs_context_t);
137int spec_blockmap (struct vnop_blockmap_args *);
138int spec_kqfilter (vnode_t vp, struct knote *kn, struct kevent_internal_s *kev);
139#endif /* BSD_KERNEL_PRIVATE */
140
141int spec_ebadf(void *);
142
143int spec_lookup (struct vnop_lookup_args *);
144#define spec_create (int (*) (struct vnop_access_args *))err_create
145#define spec_mknod (int (*) (struct vnop_access_args *))err_mknod
146int spec_open (struct vnop_open_args *);
147int spec_close (struct vnop_close_args *);
148#define spec_access (int (*) (struct vnop_access_args *))spec_ebadf
149#define spec_getattr (int (*) (struct vnop_getattr_args *))spec_ebadf
150#define spec_setattr (int (*) (struct vnop_setattr_args *))spec_ebadf
151int spec_read (struct vnop_read_args *);
152int spec_write (struct vnop_write_args *);
153int spec_ioctl (struct vnop_ioctl_args *);
154int spec_select (struct vnop_select_args *);
155#define spec_revoke (int (*) (struct vnop_access_args *))nop_revoke
156#define spec_mmap (int (*) (struct vnop_access_args *))err_mmap
157int spec_fsync (struct vnop_fsync_args *);
158#define spec_remove (int (*) (struct vnop_access_args *))err_remove
159#define spec_link (int (*) (struct vnop_access_args *))err_link
160#define spec_rename (int (*) (struct vnop_access_args *))err_rename
161#define spec_mkdir (int (*) (struct vnop_access_args *))err_mkdir
162#define spec_rmdir (int (*) (struct vnop_access_args *))err_rmdir
163#define spec_symlink (int (*) (struct vnop_access_args *))err_symlink
164#define spec_readdir (int (*) (struct vnop_access_args *))err_readdir
165#define spec_readlink (int (*) (struct vnop_access_args *))err_readlink
166#define spec_inactive (int (*) (struct vnop_access_args *))nop_inactive
167#define spec_reclaim (int (*) (struct vnop_access_args *))nop_reclaim
168#define spec_lock (int (*) (struct vnop_access_args *))nop_lock
169#define spec_unlock (int (*)(struct vnop_access_args *))nop_unlock
170int spec_strategy (struct vnop_strategy_args *);
171#define spec_islocked (int (*) (struct vnop_access_args *))nop_islocked
172int spec_pathconf (struct vnop_pathconf_args *);
173#define spec_advlock (int (*) (struct vnop_access_args *))err_advlock
174#define spec_blkatoff (int (*) (struct vnop_access_args *))err_blkatoff
175#define spec_valloc (int (*) (struct vnop_access_args *))err_valloc
176#define spec_vfree (int (*) (struct vnop_access_args *))err_vfree
177#define spec_bwrite (int (*) (struct vnop_bwrite_args *))nop_bwrite
178__END_DECLS
179
180#endif /* __APPLE_API_PRIVATE */
181#endif /* _MISCFS_SPECFS_SPECDEV_H_ */
182