1/*	$NetBSD: netbsd32_event.c,v 1.14 2023/07/29 12:48:15 rin 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 1.14 2023/07/29 12:48:15 rin 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#include <compat/netbsd32/netbsd32_event.h>
48
49int
50netbsd32_kevent_fetch_timeout(const void *src, void *dest, size_t length)
51{
52	struct netbsd32_timespec ts32;
53	int error;
54
55	KASSERT(length == sizeof(struct timespec));
56
57	error = copyin(src, &ts32, sizeof(ts32));
58	if (error)
59		return error;
60	netbsd32_to_timespec(&ts32, (struct timespec *)dest);
61	return 0;
62}
63
64static int
65netbsd32_kevent_fetch_changes(void *ctx, const struct kevent *changelist,
66    struct kevent *changes, size_t index, int n)
67{
68	const struct netbsd32_kevent *src =
69	    (const struct netbsd32_kevent *)changelist;
70	struct netbsd32_kevent *kev32, *changes32 = ctx;
71	int error, i;
72
73	error = copyin(src + index, changes32, n * sizeof(*changes32));
74	if (error)
75		return error;
76	for (i = 0, kev32 = changes32; i < n; i++, kev32++, changes++)
77		netbsd32_to_kevent(kev32, changes);
78	return 0;
79}
80
81static int
82netbsd32_kevent_put_events(void *ctx, struct kevent *events,
83    struct kevent *eventlist, size_t index, int n)
84{
85	struct netbsd32_kevent *kev32, *events32 = ctx;
86	int i;
87
88	for (i = 0, kev32 = events32; i < n; i++, kev32++, events++)
89		netbsd32_from_kevent(events, kev32);
90	kev32 = ((struct netbsd32_kevent *)eventlist) + index;
91	return  copyout(events32, kev32, n * sizeof(*events32));
92}
93
94int
95netbsd32_kevent1(register_t *retval, int fd,
96    const netbsd32_keventp_t changelist, netbsd32_size_t nchanges,
97    netbsd32_keventp_t eventlist, netbsd32_size_t nevents,
98    netbsd32_timespecp_t timeout, struct kevent_ops *kops)
99{
100	const size_t maxalloc = KQ_NEVENTS;
101	int error;
102
103	kops->keo_private =
104	    kmem_alloc(maxalloc * sizeof(struct netbsd32_kevent), KM_SLEEP);
105
106	error = kevent1(retval, fd, NETBSD32PTR64(changelist), nchanges,
107	    NETBSD32PTR64(eventlist), nevents, NETBSD32PTR64(timeout), kops);
108
109	kmem_free(kops->keo_private, maxalloc * sizeof(struct netbsd32_kevent));
110	return error;
111}
112
113int
114netbsd32___kevent100(struct lwp *l,
115    const struct netbsd32___kevent100_args *uap, register_t *retval)
116{
117	/* {
118		syscallarg(int) fd;
119		syscallarg(const netbsd32_keventp_t) changelist;
120		syscallarg(netbsd32_size_t) nchanges;
121		syscallarg(netbsd32_keventp_t) eventlist;
122		syscallarg(netbsd32_size_t) nevents;
123		syscallarg(netbsd32_timespecp_t) timeout;
124	} */
125	struct kevent_ops kops = {
126		.keo_fetch_timeout = netbsd32_kevent_fetch_timeout,
127		.keo_fetch_changes = netbsd32_kevent_fetch_changes,
128		.keo_put_events = netbsd32_kevent_put_events,
129	};
130
131	return netbsd32_kevent1(retval, SCARG(uap, fd),
132	    SCARG(uap, changelist), SCARG(uap, nchanges),
133	    SCARG(uap, eventlist), SCARG(uap, nevents),
134	    SCARG(uap, timeout), &kops);
135}
136