1/*	$NetBSD: tmpfs_specops.c,v 1.16 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 special devices.
35 */
36
37#include <sys/cdefs.h>
38__KERNEL_RCSID(0, "$NetBSD: tmpfs_specops.c,v 1.16 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_specops.h>
45
46/*
47 * vnode operations vector used for special devices stored in a tmpfs
48 * file system.
49 */
50
51int (**tmpfs_specop_p)(void *);
52
53const struct vnodeopv_entry_desc tmpfs_specop_entries[] = {
54	{ &vop_default_desc,		vn_default_error },
55	GENFS_SPECOP_ENTRIES,
56	{ &vop_close_desc,		tmpfs_spec_close },
57	{ &vop_access_desc,		tmpfs_access },
58	{ &vop_accessx_desc,		genfs_accessx },
59	{ &vop_getattr_desc,		tmpfs_getattr },
60	{ &vop_setattr_desc,		tmpfs_setattr },
61	{ &vop_read_desc,		tmpfs_spec_read },
62	{ &vop_write_desc,		tmpfs_spec_write },
63	{ &vop_fcntl_desc,		genfs_fcntl },
64	{ &vop_fsync_desc,		spec_fsync },
65	{ &vop_inactive_desc,		tmpfs_inactive },
66	{ &vop_reclaim_desc,		tmpfs_reclaim },
67	{ &vop_lock_desc,		genfs_lock },
68	{ &vop_unlock_desc,		genfs_unlock },
69	{ &vop_print_desc,		tmpfs_print },
70	{ &vop_islocked_desc,		genfs_islocked },
71	{ &vop_bwrite_desc,		vn_bwrite },
72	{ NULL, NULL }
73};
74
75const struct vnodeopv_desc tmpfs_specop_opv_desc = {
76	&tmpfs_specop_p, tmpfs_specop_entries
77};
78
79int
80tmpfs_spec_close(void *v)
81{
82	struct vop_close_args /* {
83		struct vnode	*a_vp;
84		int		a_fflag;
85		kauth_cred_t	a_cred;
86	} */ *ap __unused = v;
87
88	return VOCALL(spec_vnodeop_p, VOFFSET(vop_close), v);
89}
90
91int
92tmpfs_spec_read(void *v)
93{
94	struct vop_read_args /* {
95		struct vnode *a_vp;
96		struct uio *a_uio;
97		int a_ioflag;
98		kauth_cred_t a_cred;
99	} */ *ap = v;
100	vnode_t *vp = ap->a_vp;
101
102	tmpfs_update(vp, TMPFS_UPDATE_ATIME);
103	return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v);
104}
105
106int
107tmpfs_spec_write(void *v)
108{
109	struct vop_write_args /* {
110		struct vnode *a_vp;
111		struct uio *a_uio;
112		int a_ioflag;
113		kauth_cred_t a_cred;
114	} */ *ap = v;
115	vnode_t *vp = ap->a_vp;
116
117	tmpfs_update(vp, TMPFS_UPDATE_MTIME);
118	return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v);
119}
120