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
51static int
52tmpfs_fifo_kqfilter(struct vop_kqfilter_args *ap)
53{
54	struct vnode *vp;
55	struct tmpfs_node *node;
56
57	vp = ap->a_vp;
58	node = VP_TO_TMPFS_NODE(vp);
59
60	switch (ap->a_kn->kn_filter){
61	case EVFILT_READ:
62		node->tn_status |= TMPFS_NODE_ACCESSED;
63		break;
64	case EVFILT_WRITE:
65		node->tn_status |= TMPFS_NODE_MODIFIED;
66		break;
67	}
68
69	return fifo_specops.vop_kqfilter(ap);
70}
71
72static int
73tmpfs_fifo_close(struct vop_close_args *v)
74{
75	struct tmpfs_node *node;
76	node = VP_TO_TMPFS_NODE(v->a_vp);
77	node->tn_status |= TMPFS_NODE_ACCESSED;
78
79	tmpfs_update(v->a_vp);
80	return fifo_specops.vop_close(v);
81}
82
83/*
84 * vnode operations vector used for fifos stored in a tmpfs file system.
85 */
86struct vop_vector tmpfs_fifoop_entries = {
87	.vop_default =			&fifo_specops,
88	.vop_close =			tmpfs_fifo_close,
89	.vop_reclaim =			tmpfs_reclaim,
90	.vop_access =			tmpfs_access,
91	.vop_getattr =			tmpfs_getattr,
92	.vop_setattr =			tmpfs_setattr,
93	.vop_kqfilter =			tmpfs_fifo_kqfilter,
94};
95
96