1/*	$NetBSD: netbsd32_event.c,v 1.9 2011/05/23 21:34:47 joerg Exp $	*/
2
3/*
4 *  Copyright (c) 2005 The NetBSD Foundation.
5 *  All rights reserved.
6 *
7 *  Redistribution and use in source and binary forms, with or without
8 *  modification, are permitted provided that the following conditions
9 *  are met:
10 *  1. Redistributions of source code must retain the above copyright
11 *     notice, this list of conditions and the following disclaimer.
12 *  2. Redistributions in binary form must reproduce the above copyright
13 *     notice, this list of conditions and the following disclaimer in the
14 *     documentation and/or other materials provided with the distribution.
15 *
16 *  THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 *  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 *  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 *  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 *  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 *  POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__KERNEL_RCSID(0, "$NetBSD: netbsd32_event.c,v 1.9 2011/05/23 21:34:47 joerg Exp $");
31
32#include <sys/types.h>
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/file.h>
36#include <sys/filedesc.h>
37#include <sys/select.h>
38#include <sys/event.h>
39#include <sys/eventvar.h>
40#include <sys/proc.h>
41#include <sys/dirent.h>
42
43#include <compat/netbsd32/netbsd32.h>
44#include <compat/netbsd32/netbsd32_syscall.h>
45#include <compat/netbsd32/netbsd32_syscallargs.h>
46#include <compat/netbsd32/netbsd32_conv.h>
47
48static int
49netbsd32_kevent_fetch_timeout(const void *src, void *dest, size_t length)
50{
51	struct netbsd32_timespec ts32;
52	int error;
53
54	KASSERT(length == sizeof(struct timespec));
55
56	error = copyin(src, &ts32, sizeof(ts32));
57	if (error)
58		return error;
59	netbsd32_to_timespec(&ts32, (struct timespec *)dest);
60	return 0;
61}
62
63static int
64netbsd32_kevent_fetch_changes(void *private, const struct kevent *changelist,
65    struct kevent *changes, size_t index, int n)
66{
67	const struct netbsd32_kevent *src =
68	    (const struct netbsd32_kevent *)changelist;
69	struct netbsd32_kevent *kev32, *changes32 = private;
70	int error, i;
71
72	error = copyin(src + index, changes32, n * sizeof(*changes32));
73	if (error)
74		return error;
75	for (i = 0, kev32 = changes32; i < n; i++, kev32++, changes++)
76		netbsd32_to_kevent(kev32, changes);
77	return 0;
78}
79
80static int
81netbsd32_kevent_put_events(void *private, struct kevent *events,
82    struct kevent *eventlist, size_t index, int n)
83{
84	struct netbsd32_kevent *kev32, *events32 = private;
85	int i;
86
87	for (i = 0, kev32 = events32; i < n; i++, kev32++, events++)
88		netbsd32_from_kevent(events, kev32);
89	kev32 = (struct netbsd32_kevent *)eventlist;
90	return  copyout(events32, kev32, n * sizeof(*events32));
91}
92
93int
94netbsd32___kevent50(struct lwp *l,
95    const struct netbsd32___kevent50_args *uap, register_t *retval)
96{
97	/* {
98		syscallarg(int) fd;
99		syscallarg(netbsd32_keventp_t) changelist;
100		syscallarg(netbsd32_size_t) nchanges;
101		syscallarg(netbsd32_keventp_t) eventlist;
102		syscallarg(netbsd32_size_t) nevents;
103		syscallarg(netbsd32_timespecp_t) timeout;
104	} */
105	int error;
106	size_t maxalloc, nchanges, nevents;
107	struct kevent_ops netbsd32_kevent_ops = {
108		.keo_fetch_timeout = netbsd32_kevent_fetch_timeout,
109		.keo_fetch_changes = netbsd32_kevent_fetch_changes,
110		.keo_put_events = netbsd32_kevent_put_events,
111	};
112
113	nchanges = SCARG(uap, nchanges);
114	nevents = SCARG(uap, nevents);
115	maxalloc = KQ_NEVENTS;
116
117	netbsd32_kevent_ops.keo_private =
118	    kmem_alloc(maxalloc * sizeof(struct netbsd32_kevent), KM_SLEEP);
119
120	error = kevent1(retval, SCARG(uap, fd),
121	    NETBSD32PTR64(SCARG(uap, changelist)), nchanges,
122	    NETBSD32PTR64(SCARG(uap, eventlist)), nevents,
123	    NETBSD32PTR64(SCARG(uap, timeout)), &netbsd32_kevent_ops);
124
125	kmem_free(netbsd32_kevent_ops.keo_private,
126	    maxalloc * sizeof(struct netbsd32_kevent));
127	return error;
128}
129