1 /* $NetBSD: netbsd32_rndpseudo_50.c,v 1.6 2021/01/19 03:20:13 simonb Exp $ */
2
3 /*-
4 * Copyright (c) 1997-2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Michael Graff <explorer@flame.org> and Thor Lancelot Simon.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: netbsd32_rndpseudo_50.c,v 1.6 2021/01/19 03:20:13 simonb Exp $");
34
35 #if defined(_KERNEL_OPT)
36 #include "opt_compat_netbsd.h"
37 #include "opt_compat_netbsd32.h"
38 #endif
39
40 #include <sys/param.h>
41 #include <sys/file.h>
42
43 #include <compat/netbsd32/netbsd32.h>
44 #include <compat/sys/rnd.h>
45
46 /*
47 * Convert from rndsource_t to rndsource50_t, for the results from
48 * RNDGETNUM50 and RNDGETNAME50.
49 */
50
51 /*
52 * Convert from rndsource_t to rndsource50_32_t, for the results from
53 * RNDGETNUM50_32 and RNDGETNAME50_32.
54 */
55 static void
rndsource_to_rndsource50_32(rndsource_t * r,rndsource50_32_t * r50_32)56 rndsource_to_rndsource50_32(rndsource_t *r, rndsource50_32_t *r50_32)
57 {
58 memset(r50_32, 0, sizeof(*r50_32));
59 strlcpy(r50_32->name, r->name, sizeof(r50_32->name));
60 r50_32->total = r->total;
61 r50_32->type = r->type;
62 r50_32->flags = r->flags;
63 }
64
65 /*
66 * COMPAT32_50 handling for rnd_ioctl. This is called from rnd_ioctl.
67 *
68 * It also handles the case of (COMPAT_50 && COMPAT_NETBSD32).
69 */
70 int
compat32_50_rnd_ioctl(struct file * fp,u_long cmd,void * addr)71 compat32_50_rnd_ioctl(struct file *fp, u_long cmd, void *addr)
72 {
73 int ret = 0;
74
75 switch (cmd) {
76 case RNDGETSRCNUM50_32:
77 {
78 rndstat_t rstbuf = {.start = 0};
79 rndstat50_32_t *rst50_32 = (rndstat50_32_t *)addr;
80 size_t count;
81
82 if (rst50_32->count > RND_MAXSTATCOUNT50)
83 return EINVAL;
84
85 rstbuf.start = rst50_32->start;
86 rstbuf.count = rst50_32->count;
87
88 ret = (fp->f_ops->fo_ioctl)(fp, RNDGETSRCNUM, &rstbuf);
89 if (ret != 0)
90 return ret;
91
92 for (count = 0; count < rst50_32->count; count++) {
93 rndsource_to_rndsource50_32(&rstbuf.source[count],
94 &rst50_32->source[count]);
95 }
96 rst50_32->count = rstbuf.count;
97
98 break;
99 }
100
101 case RNDGETSRCNAME50_32:
102 {
103 rndstat_name_t rstnmbuf = {.name[0] = 0};
104 rndstat_name50_32_t *rstnm50_32;
105 rstnm50_32 = (rndstat_name50_32_t *)addr;
106
107 strlcpy(rstnmbuf.name, rstnm50_32->name, sizeof(rstnmbuf.name));
108
109 ret = (fp->f_ops->fo_ioctl)(fp, RNDGETSRCNAME, &rstnmbuf);
110 if (ret != 0)
111 return ret;
112
113 rndsource_to_rndsource50_32(&rstnmbuf.source,
114 &rstnm50_32->source);
115
116 break;
117 }
118
119 default:
120 return ENOTTY;
121 }
122
123 return ret;
124 }
125