1/*	$NetBSD: tmpfs_fifoops.c,v 1.5 2005/12/11 12:24:29 christos 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#include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
38
39#include <sys/param.h>
40#include <sys/filedesc.h>
41#include <sys/proc.h>
42#include <sys/vnode.h>
43
44#include <vm/vm.h>
45#include <vm/vm_object.h>
46
47#include <fs/tmpfs/tmpfs.h>
48#include <fs/tmpfs/tmpfs_fifoops.h>
49#include <fs/tmpfs/tmpfs_vnops.h>
50
51/* --------------------------------------------------------------------- */
52
53static int
54tmpfs_fifo_kqfilter(struct vop_kqfilter_args *ap)
55{
56	struct vnode *vp;
57	struct tmpfs_node *node;
58
59	vp = ap->a_vp;
60	node = VP_TO_TMPFS_NODE(vp);
61
62	switch (ap->a_kn->kn_filter){
63	case EVFILT_READ:
64		node->tn_status |= TMPFS_NODE_ACCESSED;
65		break;
66	case EVFILT_WRITE:
67		node->tn_status |= TMPFS_NODE_MODIFIED;
68		break;
69	}
70
71	return fifo_specops.vop_kqfilter(ap);
72}
73
74/* --------------------------------------------------------------------- */
75
76static int
77tmpfs_fifo_close(struct vop_close_args *v)
78{
79	struct tmpfs_node *node;
80	node = VP_TO_TMPFS_NODE(v->a_vp);
81	node->tn_status |= TMPFS_NODE_ACCESSED;
82
83	tmpfs_update(v->a_vp);
84	return fifo_specops.vop_close(v);
85}
86
87/*
88 * vnode operations vector used for fifos stored in a tmpfs file system.
89 */
90struct vop_vector tmpfs_fifoop_entries = {
91	.vop_default =			&fifo_specops,
92	.vop_close =			tmpfs_fifo_close,
93	.vop_reclaim =			tmpfs_reclaim,
94	.vop_access =			tmpfs_access,
95	.vop_getattr =			tmpfs_getattr,
96	.vop_setattr =			tmpfs_setattr,
97	.vop_kqfilter =			tmpfs_fifo_kqfilter,
98};
99
100