1/* $NetBSD: fifo.h,v 1.28 2022/10/26 23:40:20 riastradh Exp $ */
2
3/*
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. 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 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)fifo.h 8.6 (Berkeley) 5/21/95
32 */
33
34#ifndef _MISCFS_FIFOFS_FIFO_H_
35#define _MISCFS_FIFOFS_FIFO_H_
36
37#include <sys/vnode.h>
38
39#include <miscfs/genfs/genfs.h>
40
41extern const struct vnodeopv_desc fifo_vnodeop_opv_desc;
42
43extern int (**fifo_vnodeop_p)(void *);
44
45/*
46 * This macro provides an initializer list for the fs-independent part
47 * of a filesystem's fifo vnode ops descriptor table. We still need
48 * such a table in every filesystem, but we can at least avoid the
49 * cutpaste.
50 *
51 * This contains these ops:
52 * parsepath lookup
53 * create whiteout mknod open fallocate fdiscard ioctl poll kqfilter
54 * revoke mmap seek remove link rename mkdir rmdir symlink readdir
55 * readlink abortop bmap pathconf advlock getpages putpages
56 *
57 * The filesystem should provide these ops that need to be its own:
58 * access and accessx
59 * getattr
60 * setattr
61 * fcntl
62 * inactive
63 * reclaim
64 * lock
65 * unlock
66 * strategy
67 * print (should probably also call fifo_print)
68 * islocked
69 * bwrite (normally vn_bwrite)
70 * openextattr
71 * closeextattr
72 * getextattr
73 * setextattr
74 * listextattr
75 * deleteextattr
76 * getacl
77 * setacl
78 * aclcheck
79 *
80 * The filesystem should also provide these ops that some filesystems
81 * do their own things with:
82 * close
83 * read
84 * write
85 * fsync
86 * In most cases "their own things" means adjust timestamps and call
87 * fifo_foo (currently via vn_fifo_bypass). For fsync it varies.
88 *
89 * Note that because the op descriptor tables are unordered it does not
90 * matter where in the table this macro goes (except I think default
91 * still needs to be first...)
92 *
93 * XXX currently all the ops are vn_fifo_bypass, which does an
94 * indirect call via the fifofs ops table (externed above), which
95 * someone decided was preferable to exposing the function
96 * definitions. This includes (for now at least) the ones that are
97 * sent to genfs by that table. This should probably be changed, but
98 * not just yet.
99 */
100#define GENFS_FIFOOP_ENTRIES \
101 { &vop_parsepath_desc, genfs_badop }, /* parsepath */ \
102 { &vop_lookup_desc, vn_fifo_bypass }, /* lookup */ \
103 { &vop_create_desc, vn_fifo_bypass }, /* create */ \
104 { &vop_whiteout_desc, vn_fifo_bypass }, /* whiteout */ \
105 { &vop_mknod_desc, vn_fifo_bypass }, /* mknod */ \
106 { &vop_open_desc, vn_fifo_bypass }, /* open */ \
107 { &vop_fallocate_desc, vn_fifo_bypass }, /* fallocate */ \
108 { &vop_fdiscard_desc, vn_fifo_bypass }, /* fdiscard */ \
109 { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ \
110 { &vop_poll_desc, vn_fifo_bypass }, /* poll */ \
111 { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ \
112 { &vop_revoke_desc, vn_fifo_bypass }, /* revoke */ \
113 { &vop_mmap_desc, vn_fifo_bypass }, /* mmap */ \
114 { &vop_seek_desc, vn_fifo_bypass }, /* seek */ \
115 { &vop_remove_desc, vn_fifo_bypass }, /* remove */ \
116 { &vop_link_desc, vn_fifo_bypass }, /* link */ \
117 { &vop_rename_desc, vn_fifo_bypass }, /* rename */ \
118 { &vop_mkdir_desc, vn_fifo_bypass }, /* mkdir */ \
119 { &vop_rmdir_desc, vn_fifo_bypass }, /* rmdir */ \
120 { &vop_symlink_desc, vn_fifo_bypass }, /* symlink */ \
121 { &vop_readdir_desc, vn_fifo_bypass }, /* readdir */ \
122 { &vop_readlink_desc, vn_fifo_bypass }, /* readlink */ \
123 { &vop_abortop_desc, vn_fifo_bypass }, /* abortop */ \
124 { &vop_bmap_desc, vn_fifo_bypass }, /* bmap */ \
125 { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ \
126 { &vop_advlock_desc, vn_fifo_bypass }, /* advlock */ \
127 { &vop_getpages_desc, genfs_badop }, /* getpages */ \
128 { &vop_putpages_desc, vn_fifo_bypass } /* putpages */
129
130#endif /* _MISCFS_FIFOFS_FIFO_H_ */