1 | /* $NetBSD: specdev.h,v 1.44 2015/06/23 10:42:35 hannken Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2008 The NetBSD Foundation, Inc. |
5 | * 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 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
17 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
18 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
19 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
26 | * POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | /* |
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. Neither the name of the University nor the names of its contributors |
42 | * may be used to endorse or promote products derived from this software |
43 | * without specific prior written permission. |
44 | * |
45 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
46 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
47 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
48 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
49 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
50 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
51 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
52 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
53 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
54 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
55 | * SUCH DAMAGE. |
56 | * |
57 | * @(#)specdev.h 8.6 (Berkeley) 5/21/95 |
58 | */ |
59 | |
60 | #ifndef _MISCFS_SPECFS_SPECDEV_H_ |
61 | #define _MISCFS_SPECFS_SPECDEV_H_ |
62 | |
63 | #include <sys/mutex.h> |
64 | #include <sys/vnode.h> |
65 | |
66 | typedef struct specnode { |
67 | vnode_t *sn_next; |
68 | struct specdev *sn_dev; |
69 | u_int sn_opencnt; |
70 | dev_t sn_rdev; |
71 | bool sn_gone; |
72 | } specnode_t; |
73 | |
74 | typedef struct specdev { |
75 | struct mount *sd_mountpoint; |
76 | struct lockf *sd_lockf; |
77 | vnode_t *sd_bdevvp; |
78 | u_int sd_opencnt; |
79 | u_int sd_refcnt; |
80 | dev_t sd_rdev; |
81 | } specdev_t; |
82 | |
83 | /* |
84 | * Exported shorthand |
85 | */ |
86 | #define v_specnext v_specnode->sn_next |
87 | #define v_rdev v_specnode->sn_rdev |
88 | #define v_speclockf v_specnode->sn_dev->sd_lockf |
89 | |
90 | /* |
91 | * Special device management |
92 | */ |
93 | void spec_node_init(vnode_t *, dev_t); |
94 | void spec_node_destroy(vnode_t *); |
95 | int spec_node_lookup_by_dev(enum vtype, dev_t, vnode_t **); |
96 | int spec_node_lookup_by_mount(struct mount *, vnode_t **); |
97 | struct mount *spec_node_getmountedfs(vnode_t *); |
98 | void spec_node_setmountedfs(vnode_t *, struct mount *); |
99 | void spec_node_revoke(vnode_t *); |
100 | |
101 | /* |
102 | * Prototypes for special file operations on vnodes. |
103 | */ |
104 | extern int (**spec_vnodeop_p)(void *); |
105 | struct nameidata; |
106 | struct componentname; |
107 | struct flock; |
108 | struct buf; |
109 | struct uio; |
110 | |
111 | int spec_lookup(void *); |
112 | #define spec_create genfs_badop |
113 | #define spec_whiteout genfs_badop |
114 | #define spec_mknod genfs_badop |
115 | int spec_open(void *); |
116 | int spec_close(void *); |
117 | #define spec_access genfs_ebadf |
118 | #define spec_getattr genfs_ebadf |
119 | #define spec_setattr genfs_ebadf |
120 | int spec_read(void *); |
121 | int spec_write(void *); |
122 | #define spec_fallocate genfs_eopnotsupp |
123 | int spec_fdiscard(void *); |
124 | #define spec_fcntl genfs_fcntl |
125 | int spec_ioctl(void *); |
126 | int spec_poll(void *); |
127 | int spec_kqfilter(void *); |
128 | #define spec_revoke genfs_revoke |
129 | int spec_mmap(void *); |
130 | int spec_fsync(void *); |
131 | #define spec_seek genfs_nullop /* XXX should query device */ |
132 | #define spec_remove genfs_badop |
133 | #define spec_link genfs_badop |
134 | #define spec_rename genfs_badop |
135 | #define spec_mkdir genfs_badop |
136 | #define spec_rmdir genfs_badop |
137 | #define spec_symlink genfs_badop |
138 | #define spec_readdir genfs_badop |
139 | #define spec_readlink genfs_badop |
140 | #define spec_abortop genfs_badop |
141 | int spec_inactive(void *); |
142 | int spec_reclaim(void *); |
143 | #define spec_lock genfs_nolock |
144 | #define spec_unlock genfs_nounlock |
145 | int spec_bmap(void *); |
146 | int spec_strategy(void *); |
147 | int spec_print(void *); |
148 | #define spec_islocked genfs_noislocked |
149 | int spec_pathconf(void *); |
150 | int spec_advlock(void *); |
151 | #define spec_bwrite vn_bwrite |
152 | #define spec_getpages genfs_getpages |
153 | #define spec_putpages genfs_putpages |
154 | |
155 | bool iskmemvp(struct vnode *); |
156 | void spec_init(void); |
157 | |
158 | #endif /* _MISCFS_SPECFS_SPECDEV_H_ */ |
159 | |