1 /* $NetBSD: netbsd32_event.c,v 1.12 2014/09/05 05:26:26 matt 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 1.12 2014/09/05 05:26:26 matt 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
48 static int
netbsd32_kevent_fetch_timeout(const void * src,void * dest,size_t length)49 netbsd32_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
63 static int
netbsd32_kevent_fetch_changes(void * ctx,const struct kevent * changelist,struct kevent * changes,size_t index,int n)64 netbsd32_kevent_fetch_changes(void *ctx, 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 = ctx;
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
80 static int
netbsd32_kevent_put_events(void * ctx,struct kevent * events,struct kevent * eventlist,size_t index,int n)81 netbsd32_kevent_put_events(void *ctx, struct kevent *events,
82 struct kevent *eventlist, size_t index, int n)
83 {
84 struct netbsd32_kevent *kev32, *events32 = ctx;
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) + index;
90 return copyout(events32, kev32, n * sizeof(*events32));
91 }
92
93 int
netbsd32___kevent50(struct lwp * l,const struct netbsd32___kevent50_args * uap,register_t * retval)94 netbsd32___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