1 /* $NetBSD: rndpseudo_50.c,v 1.7 2020/04/30 03:30:10 riastradh 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: rndpseudo_50.c,v 1.7 2020/04/30 03:30:10 riastradh Exp $");
34
35 #if defined(_KERNEL_OPT)
36 #include "opt_compat_netbsd.h"
37 #endif
38
39 #include <sys/param.h>
40 #include <sys/file.h>
41 #include <sys/module_hook.h>
42 #include <sys/compat_stub.h>
43
44 #include <compat/sys/rnd.h>
45 #include <compat/common/compat_mod.h>
46
47 /*
48 * Convert from rndsource_t to rndsource50_t, for the results from
49 * RNDGETNUM50 and RNDGETNAME50.
50 */
51 static void
rndsource_to_rndsource50(rndsource_t * r,rndsource50_t * r50)52 rndsource_to_rndsource50(rndsource_t *r, rndsource50_t *r50)
53 {
54 memset(r50, 0, sizeof(*r50));
55 strlcpy(r50->name, r->name, sizeof(r50->name));
56 r50->total = r->total;
57 r50->type = r->type;
58 r50->flags = r->flags;
59 }
60
61 /*
62 * COMPAT_50 handling for rnd_ioctl. This is called from rnd_ioctl.
63 *
64 * It also handles the case of (COMPAT_50 && COMPAT_NETBSD32).
65 */
66 int
compat_50_rnd_ioctl(struct file * fp,u_long cmd,void * addr)67 compat_50_rnd_ioctl(struct file *fp, u_long cmd, void *addr)
68 {
69 int ret = 0;
70
71 switch (cmd) {
72
73 case RNDGETSRCNUM50:
74 {
75 rndstat_t rstbuf = {.start = 0};
76 rndstat50_t *rst50 = (rndstat50_t *)addr;
77 size_t count;
78
79 if (rst50->count > RND_MAXSTATCOUNT50)
80 return EINVAL;
81
82 rstbuf.start = rst50->start;
83 rstbuf.count = rst50->count;
84
85 ret = (fp->f_ops->fo_ioctl)(fp, RNDGETSRCNUM, &rstbuf);
86 if (ret != 0)
87 return ret;
88
89 for (count = 0; count < rst50->count; count++) {
90 rndsource_to_rndsource50(&rstbuf.source[count],
91 &rst50->source[count]);
92 }
93 rst50->count = rstbuf.count;
94
95 break;
96 }
97
98 case RNDGETSRCNAME50:
99 {
100 rndstat_name_t rstnmbuf = {.name[0] = 0};
101 rndstat_name50_t *rstnm50;
102 rstnm50 = (rndstat_name50_t *)addr;
103
104 strlcpy(rstnmbuf.name, rstnm50->name, sizeof(rstnmbuf.name));
105
106 ret = (fp->f_ops->fo_ioctl)(fp, RNDGETSRCNAME, &rstnmbuf);
107 if (ret != 0)
108 return ret;
109
110 rndsource_to_rndsource50(&rstnmbuf.source, &rstnm50->source);
111
112 break;
113 }
114
115 default:
116 return ENOTTY;
117 }
118
119 return ret;
120 }
121
122 void
rndpseudo_50_init(void)123 rndpseudo_50_init(void)
124 {
125
126 MODULE_HOOK_SET(rnd_ioctl_50_hook, compat_50_rnd_ioctl);
127 }
128
129 void
rndpseudo_50_fini(void)130 rndpseudo_50_fini(void)
131 {
132
133 MODULE_HOOK_UNSET(rnd_ioctl_50_hook);
134 }
135