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 */
49 int (**tmpfs_fifoop_p)(void *);
50 const 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
73 const struct vnodeopv_desc tmpfs_fifoop_opv_desc = {
74 &tmpfs_fifoop_p, tmpfs_fifoop_entries
75 };
76
77 int
tmpfs_fifo_close(void * v)78 tmpfs_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
89 int
tmpfs_fifo_read(void * v)90 tmpfs_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
104 int
tmpfs_fifo_write(void * v)105 tmpfs_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