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 | */ |
77 | struct 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 | thread_t si_mountingowner; |
93 | }; |
94 | /* |
95 | * Exported shorthand |
96 | */ |
97 | #define v_rdev v_specinfo->si_rdev |
98 | #define v_hashchain v_specinfo->si_hashchain |
99 | #define v_specnext v_specinfo->si_specnext |
100 | #define v_specflags v_specinfo->si_flags |
101 | #define v_specsize v_specinfo->si_size |
102 | #define v_specdevsize v_specinfo->si_devsize |
103 | #define v_speclastr v_specinfo->si_lastr |
104 | |
105 | /* |
106 | * Flags for specinfo |
107 | */ |
108 | #define SI_MOUNTEDON 0x0001 /* block special device is mounted on */ |
109 | #define SI_ALIASED 0x0002 /* multiple active vnodes refer to this device */ |
110 | #define SI_MOUNTING 0x0004 /* block special device is getting mounted on */ |
111 | |
112 | /* |
113 | * Special device management |
114 | */ |
115 | #define SPECHSZ 64 |
116 | #if ((SPECHSZ & (SPECHSZ - 1)) == 0) |
117 | #define SPECHASH(rdev) (((rdev>>21)+(rdev))&(SPECHSZ-1)) |
118 | #else |
119 | #define SPECHASH(rdev) (((unsigned)((rdev>>21)+(rdev)))%SPECHSZ) |
120 | #endif |
121 | |
122 | extern struct vnode *speclisth[SPECHSZ]; |
123 | |
124 | /* |
125 | * Prototypes for special file operations on vnodes. |
126 | */ |
127 | extern int(**spec_vnodeop_p)(void *); |
128 | struct nameidata; |
129 | struct componentname; |
130 | struct flock; |
131 | struct buf; |
132 | struct uio; |
133 | |
134 | __BEGIN_DECLS |
135 | #ifdef BSD_KERNEL_PRIVATE |
136 | int spec_blktooff(struct vnop_blktooff_args *); |
137 | int spec_offtoblk(struct vnop_offtoblk_args *); |
138 | int spec_fsync_internal(vnode_t, int, vfs_context_t); |
139 | int spec_blockmap(struct vnop_blockmap_args *); |
140 | int spec_kqfilter(vnode_t vp, struct knote *kn, struct kevent_qos_s *kev); |
141 | #endif /* BSD_KERNEL_PRIVATE */ |
142 | |
143 | int spec_ebadf(void *); |
144 | |
145 | int spec_lookup(struct vnop_lookup_args *); |
146 | #define spec_create (int (*) (struct vnop_access_args *))err_create |
147 | #define spec_mknod (int (*) (struct vnop_access_args *))err_mknod |
148 | int spec_open(struct vnop_open_args *); |
149 | int spec_close(struct vnop_close_args *); |
150 | #define spec_access (int (*) (struct vnop_access_args *))spec_ebadf |
151 | #define spec_getattr (int (*) (struct vnop_getattr_args *))spec_ebadf |
152 | #define spec_setattr (int (*) (struct vnop_setattr_args *))spec_ebadf |
153 | int spec_read(struct vnop_read_args *); |
154 | int spec_write(struct vnop_write_args *); |
155 | int spec_ioctl(struct vnop_ioctl_args *); |
156 | int spec_select(struct vnop_select_args *); |
157 | #define spec_revoke (int (*) (struct vnop_access_args *))nop_revoke |
158 | #define spec_mmap (int (*) (struct vnop_access_args *))err_mmap |
159 | int spec_fsync(struct vnop_fsync_args *); |
160 | #define spec_remove (int (*) (struct vnop_access_args *))err_remove |
161 | #define spec_link (int (*) (struct vnop_access_args *))err_link |
162 | #define spec_rename (int (*) (struct vnop_access_args *))err_rename |
163 | #define spec_mkdir (int (*) (struct vnop_access_args *))err_mkdir |
164 | #define spec_rmdir (int (*) (struct vnop_access_args *))err_rmdir |
165 | #define spec_symlink (int (*) (struct vnop_access_args *))err_symlink |
166 | #define spec_readdir (int (*) (struct vnop_access_args *))err_readdir |
167 | #define spec_readlink (int (*) (struct vnop_access_args *))err_readlink |
168 | #define spec_inactive (int (*) (struct vnop_access_args *))nop_inactive |
169 | #define spec_reclaim (int (*) (struct vnop_access_args *))nop_reclaim |
170 | #define spec_lock (int (*) (struct vnop_access_args *))nop_lock |
171 | #define spec_unlock (int (*)(struct vnop_access_args *))nop_unlock |
172 | int spec_strategy(struct vnop_strategy_args *); |
173 | #define spec_islocked (int (*) (struct vnop_access_args *))nop_islocked |
174 | int spec_pathconf(struct vnop_pathconf_args *); |
175 | #define spec_advlock (int (*) (struct vnop_access_args *))err_advlock |
176 | #define spec_blkatoff (int (*) (struct vnop_access_args *))err_blkatoff |
177 | #define spec_valloc (int (*) (struct vnop_access_args *))err_valloc |
178 | #define spec_vfree (int (*) (struct vnop_access_args *))err_vfree |
179 | #define spec_bwrite (int (*) (struct vnop_bwrite_args *))nop_bwrite |
180 | __END_DECLS |
181 | |
182 | #endif /* __APPLE_API_PRIVATE */ |
183 | #endif /* _MISCFS_SPECFS_SPECDEV_H_ */ |
184 | |