1/*	$NetBSD: tmpfs_fifoops.c,v 1.15 2021/07/19 01:30:25 dholland Exp $	*/
2
3/*
4 * Copyright (c) 2005 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code
9 * 2005 program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33/*
34 * tmpfs vnode interface for named pipes.
35 */
36
37#include <sys/cdefs.h>
38__KERNEL_RCSID(0, "$NetBSD: tmpfs_fifoops.c,v 1.15 2021/07/19 01:30:25 dholland Exp $");
39
40#include <sys/param.h>
41#include <sys/vnode.h>
42
43#include <fs/tmpfs/tmpfs.h>
44#include <fs/tmpfs/tmpfs_fifoops.h>
45
46/*
47 * vnode operations vector used for fifos stored in a tmpfs file system.
48 */
49int (**tmpfs_fifoop_p)(void *);
50const struct vnodeopv_entry_desc tmpfs_fifoop_entries[] = {
51	{ &vop_default_desc,		vn_default_error },
52	GENFS_FIFOOP_ENTRIES,
53	{ &vop_close_desc,		tmpfs_fifo_close },
54	{ &vop_access_desc,		tmpfs_access },
55	{ &vop_accessx_desc,		genfs_accessx },
56	{ &vop_getattr_desc,		tmpfs_getattr },
57	{ &vop_setattr_desc,		tmpfs_setattr },
58	{ &vop_read_desc,		tmpfs_fifo_read },
59	{ &vop_write_desc,		tmpfs_fifo_write },
60	{ &vop_fcntl_desc,		genfs_fcntl },
61	{ &vop_fsync_desc,		vn_fifo_bypass },
62	{ &vop_inactive_desc,		tmpfs_inactive },
63	{ &vop_reclaim_desc,		tmpfs_reclaim },
64	{ &vop_lock_desc,		genfs_lock },
65	{ &vop_unlock_desc,		genfs_unlock },
66	{ &vop_strategy_desc,		vn_fifo_bypass },
67	{ &vop_print_desc,		tmpfs_print },
68	{ &vop_islocked_desc,		genfs_islocked },
69	{ &vop_bwrite_desc,		genfs_nullop },
70	{ NULL, NULL }
71};
72
73const struct vnodeopv_desc tmpfs_fifoop_opv_desc = {
74	&tmpfs_fifoop_p, tmpfs_fifoop_entries
75};
76
77int
78tmpfs_fifo_close(void *v)
79{
80	struct vop_close_args /* {
81		struct vnode	*a_vp;
82		int		a_fflag;
83		kauth_cred_t	a_cred;
84	} */ *ap __unused = v;
85
86	return VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), v);
87}
88
89int
90tmpfs_fifo_read(void *v)
91{
92	struct vop_read_args /* {
93		struct vnode *a_vp;
94		struct uio *a_uio;
95		int a_ioflag;
96		kauth_cred_t a_cred;
97	} */ *ap = v;
98	vnode_t *vp = ap->a_vp;
99
100	tmpfs_update(vp, TMPFS_UPDATE_ATIME);
101	return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v);
102}
103
104int
105tmpfs_fifo_write(void *v)
106{
107	struct vop_write_args /* {
108		struct vnode *a_vp;
109		struct uio *a_uio;
110		int a_ioflag;
111		kauth_cred_t a_cred;
112	} */ *ap = v;
113	vnode_t *vp = ap->a_vp;
114
115	tmpfs_update(vp, TMPFS_UPDATE_MTIME);
116	return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v);
117}
118