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: releng/11.0/sys/fs/tmpfs/tmpfs_fifoops.c 268605 2014-07-14 08:17:11Z kib $");
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 static int
52 tmpfs_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
72 static int
73 tmpfs_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 */
86 struct 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
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