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/* $NetBSD: rndpseudo_50.c,v 1.7 2020/04/30 03:30:10 riastradh Exp $ */
/*-
* Copyright (c) 1997-2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Michael Graff <explorer@flame.org> and Thor Lancelot Simon.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rndpseudo_50.c,v 1.7 2020/04/30 03:30:10 riastradh Exp $");
#if defined(_KERNEL_OPT)
#include "opt_compat_netbsd.h"
#endif
#include <sys/param.h>
#include <sys/file.h>
#include <sys/module_hook.h>
#include <sys/compat_stub.h>
#include <compat/sys/rnd.h>
#include <compat/common/compat_mod.h>
/*
* Convert from rndsource_t to rndsource50_t, for the results from
* RNDGETNUM50 and RNDGETNAME50.
*/
static void
rndsource_to_rndsource50(rndsource_t *r, rndsource50_t *r50)
{
memset(r50, 0, sizeof(*r50));
strlcpy(r50->name, r->name, sizeof(r50->name));
r50->total = r->total;
r50->type = r->type;
r50->flags = r->flags;
}
/*
* COMPAT_50 handling for rnd_ioctl. This is called from rnd_ioctl.
*
* It also handles the case of (COMPAT_50 && COMPAT_NETBSD32).
*/
int
compat_50_rnd_ioctl(struct file *fp, u_long cmd, void *addr)
{
int ret = 0;
switch (cmd) {
case RNDGETSRCNUM50:
{
rndstat_t rstbuf = {.start = 0};
rndstat50_t *rst50 = (rndstat50_t *)addr;
size_t count;
if (rst50->count > RND_MAXSTATCOUNT50)
return EINVAL;
rstbuf.start = rst50->start;
rstbuf.count = rst50->count;
ret = (fp->f_ops->fo_ioctl)(fp, RNDGETSRCNUM, &rstbuf);
if (ret != 0)
return ret;
for (count = 0; count < rst50->count; count++) {
rndsource_to_rndsource50(&rstbuf.source[count],
&rst50->source[count]);
}
rst50->count = rstbuf.count;
break;
}
case RNDGETSRCNAME50:
{
rndstat_name_t rstnmbuf = {.name[0] = 0};
rndstat_name50_t *rstnm50;
rstnm50 = (rndstat_name50_t *)addr;
strlcpy(rstnmbuf.name, rstnm50->name, sizeof(rstnmbuf.name));
ret = (fp->f_ops->fo_ioctl)(fp, RNDGETSRCNAME, &rstnmbuf);
if (ret != 0)
return ret;
rndsource_to_rndsource50(&rstnmbuf.source, &rstnm50->source);
break;
}
default:
return ENOTTY;
}
return ret;
}
void
rndpseudo_50_init(void)
{
MODULE_HOOK_SET(rnd_ioctl_50_hook, compat_50_rnd_ioctl);
}
void
rndpseudo_50_fini(void)
{
MODULE_HOOK_UNSET(rnd_ioctl_50_hook);
}
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