Annotation of sys/miscfs/specfs/specdev.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: specdev.h,v 1.20 2007/06/02 00:45:21 thib Exp $ */
2: /* $NetBSD: specdev.h,v 1.12 1996/02/13 13:13:01 mycroft Exp $ */
3:
4: /*
5: * Copyright (c) 1990, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: * @(#)specdev.h 8.3 (Berkeley) 8/10/94
33: */
34:
35: /*
36: * This structure defines the information maintained about
37: * special devices. It is allocated in checkalias and freed
38: * in vgone.
39: */
40: struct specinfo {
41: struct vnode **si_hashchain;
42: struct vnode *si_specnext;
43: struct mount *si_mountpoint;
44: dev_t si_rdev;
45: struct lockf *si_lockf;
46: daddr64_t si_lastr;
47: union {
48: struct vnode *ci_parent; /* pointer back to parent device */
49: u_int8_t ci_bitmap[8]; /* bitmap of devices cloned off us */
50: } si_ci;
51: };
52:
53: struct cloneinfo {
54: struct vnode *ci_vp; /* cloned vnode */
55: void *ci_data; /* original vnode's v_data */
56: };
57:
58: /*
59: * Exported shorthand
60: */
61: #define v_rdev v_specinfo->si_rdev
62: #define v_hashchain v_specinfo->si_hashchain
63: #define v_specnext v_specinfo->si_specnext
64: #define v_specmountpoint v_specinfo->si_mountpoint
65: #define v_speclockf v_specinfo->si_lockf
66: #define v_specparent v_specinfo->si_ci.ci_parent
67: #define v_specbitmap v_specinfo->si_ci.ci_bitmap
68:
69: /*
70: * Special device management
71: */
72: #define SPECHSZ 64
73: #if ((SPECHSZ&(SPECHSZ-1)) == 0)
74: #define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1))
75: #else
76: #define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
77: #endif
78:
79: extern struct vnode *speclisth[SPECHSZ];
80:
81: /*
82: * Prototypes for special file operations on vnodes.
83: */
84: extern int (**spec_vnodeop_p)(void *);
85: struct nameidata;
86: struct componentname;
87: struct ucred;
88: struct flock;
89: struct buf;
90: struct uio;
91:
92: int spec_badop(void *);
93: int spec_ebadf(void *);
94:
95: int spec_lookup(void *);
96: #define spec_create spec_badop
97: #define spec_mknod spec_badop
98: int spec_open(void *);
99: int spec_close(void *);
100: #define spec_access spec_ebadf
101: #define spec_getattr spec_ebadf
102: #define spec_setattr spec_ebadf
103: int spec_read(void *);
104: int spec_write(void *);
105: int spec_ioctl(void *);
106: int spec_poll(void *);
107: int spec_kqfilter(void *);
108: int spec_fsync(void *);
109: #define spec_remove spec_badop
110: #define spec_link spec_badop
111: #define spec_rename spec_badop
112: #define spec_mkdir spec_badop
113: #define spec_rmdir spec_badop
114: #define spec_symlink spec_badop
115: #define spec_readdir spec_badop
116: #define spec_readlink spec_badop
117: #define spec_abortop spec_badop
118: int spec_inactive(void *);
119: #define spec_reclaim nullop
120: #define spec_lock vop_generic_lock
121: #define spec_unlock vop_generic_unlock
122: #define spec_islocked vop_generic_islocked
123: int spec_bmap(void *);
124: int spec_strategy(void *);
125: int spec_print(void *);
126: int spec_pathconf(void *);
127: int spec_advlock(void *);
128: #define spec_reallocblks spec_badop
129: #define spec_bwrite vop_generic_bwrite
130: #define spec_revoke vop_generic_revoke
131:
132: int spec_vnoperate(void *);
133:
134: /* spec_subr.c */
135: int spec_open_clone(struct vop_open_args *);
136: int spec_close_clone(struct vop_close_args *);
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